[PATCH v5 00/11] perf: Support multiple system call tables in the build

[PATCH v5 00/11] perf: Support multiple system call tables in the build

[Ian Rogers]

This work builds on the clean up of system call tables and removal of
libaudit by Charlie Jenkins <charlie@rivosinc.com>.

The system call table in perf trace is used to map system call numbers
to names and vice versa. Prior to these changes, a single table
matching the perf binary's build was present. The table would be
incorrect if tracing say a 32-bit binary from a 64-bit version of
perf, the names and numbers wouldn't match.

Change the build so that a single system call file is built and the
potentially multiple tables are identifiable from the ELF machine type
of the process being examined. To determine the ELF machine type, the
executable's maps are searched and the associated DSOs ELF headers are
read. When this fails and when live, /proc/pid/exe's ELF header is
read. Fallback to using the perf's binary type when unknown.

Remove some runtime types used by the system call tables and make
equivalents generated at build time.

v5: Add byte swap to dso__e_machine and fix comment as suggested by
    Namhyung.

v4: Add reading the e_machine from the thread's maps dsos, only read
    from /proc/pid/exe on failure and when live as requested by
    Namhyung. Add patches to add dso comments and remove unused
    dso_data variables that are unused without libunwind.

v3: Add Charlie's reviewed-by tags. Incorporate feedback from Arnd
    Bergmann <arnd@arndb.de> on additional optional column and MIPS
    system call numbering. Rebase past Namhyung's global system call
    statistics and add comments that they don't yet support an
    e_machine other than EM_HOST.

v2: Change the 1 element cache for the last table as suggested by
    Howard Chu, add Howard's reviewed-by tags.
    Add a comment and apology to Charlie for not doing better in
    guiding:
    https://lore.kernel.org/all/20250114-perf_syscall_arch_runtime-v1-1-5b304e408e11@rivosinc.com/
    After discussion on v1 and he agreed this patch series would be
    the better direction.

Ian Rogers (11):
  perf dso: Move libunwind dso_data variables into ifdef
  perf dso: kernel-doc for enum dso_binary_type
  perf syscalltbl: Remove syscall_table.h
  perf trace: Reorganize syscalls
  perf syscalltbl: Remove struct syscalltbl
  perf dso: Add support for reading the e_machine type for a dso
  perf thread: Add support for reading the e_machine type for a thread
  perf trace beauty: Add syscalltbl.sh generating all system call tables
  perf syscalltbl: Use lookup table containing multiple architectures
  perf build: Remove Makefile.syscalls
  perf syscalltbl: Mask off ABI type for MIPS system calls

 tools/perf/Makefile.perf                      |  10 +-
 tools/perf/arch/alpha/entry/syscalls/Kbuild   |   2 -
 .../alpha/entry/syscalls/Makefile.syscalls    |   5 -
 tools/perf/arch/alpha/include/syscall_table.h |   2 -
 tools/perf/arch/arc/entry/syscalls/Kbuild     |   2 -
 .../arch/arc/entry/syscalls/Makefile.syscalls |   3 -
 tools/perf/arch/arc/include/syscall_table.h   |   2 -
 tools/perf/arch/arm/entry/syscalls/Kbuild     |   4 -
 .../arch/arm/entry/syscalls/Makefile.syscalls |   2 -
 tools/perf/arch/arm/include/syscall_table.h   |   2 -
 tools/perf/arch/arm64/entry/syscalls/Kbuild   |   3 -
 .../arm64/entry/syscalls/Makefile.syscalls    |   6 -
 tools/perf/arch/arm64/include/syscall_table.h |   8 -
 tools/perf/arch/csky/entry/syscalls/Kbuild    |   2 -
 .../csky/entry/syscalls/Makefile.syscalls     |   3 -
 tools/perf/arch/csky/include/syscall_table.h  |   2 -
 .../perf/arch/loongarch/entry/syscalls/Kbuild |   2 -
 .../entry/syscalls/Makefile.syscalls          |   3 -
 .../arch/loongarch/include/syscall_table.h    |   2 -
 tools/perf/arch/mips/entry/syscalls/Kbuild    |   2 -
 .../mips/entry/syscalls/Makefile.syscalls     |   5 -
 tools/perf/arch/mips/include/syscall_table.h  |   2 -
 tools/perf/arch/parisc/entry/syscalls/Kbuild  |   3 -
 .../parisc/entry/syscalls/Makefile.syscalls   |   6 -
 .../perf/arch/parisc/include/syscall_table.h  |   8 -
 tools/perf/arch/powerpc/entry/syscalls/Kbuild |   3 -
 .../powerpc/entry/syscalls/Makefile.syscalls  |   6 -
 .../perf/arch/powerpc/include/syscall_table.h |   8 -
 tools/perf/arch/riscv/entry/syscalls/Kbuild   |   2 -
 .../riscv/entry/syscalls/Makefile.syscalls    |   4 -
 tools/perf/arch/riscv/include/syscall_table.h |   8 -
 tools/perf/arch/s390/entry/syscalls/Kbuild    |   2 -
 .../s390/entry/syscalls/Makefile.syscalls     |   5 -
 tools/perf/arch/s390/include/syscall_table.h  |   2 -
 tools/perf/arch/sh/entry/syscalls/Kbuild      |   2 -
 .../arch/sh/entry/syscalls/Makefile.syscalls  |   4 -
 tools/perf/arch/sh/include/syscall_table.h    |   2 -
 tools/perf/arch/sparc/entry/syscalls/Kbuild   |   3 -
 .../sparc/entry/syscalls/Makefile.syscalls    |   5 -
 tools/perf/arch/sparc/include/syscall_table.h |   8 -
 tools/perf/arch/x86/entry/syscalls/Kbuild     |   3 -
 .../arch/x86/entry/syscalls/Makefile.syscalls |   6 -
 tools/perf/arch/x86/include/syscall_table.h   |   8 -
 tools/perf/arch/xtensa/entry/syscalls/Kbuild  |   2 -
 .../xtensa/entry/syscalls/Makefile.syscalls   |   4 -
 .../perf/arch/xtensa/include/syscall_table.h  |   2 -
 tools/perf/builtin-trace.c                    | 290 +++++++++++-------
 tools/perf/scripts/Makefile.syscalls          |  61 ----
 tools/perf/scripts/syscalltbl.sh              |  86 ------
 tools/perf/trace/beauty/syscalltbl.sh         | 274 +++++++++++++++++
 tools/perf/util/dso.c                         |  88 ++++++
 tools/perf/util/dso.h                         |  58 ++++
 tools/perf/util/symbol-elf.c                  |  27 --
 tools/perf/util/syscalltbl.c                  | 148 ++++-----
 tools/perf/util/syscalltbl.h                  |  22 +-
 tools/perf/util/thread.c                      |  80 +++++
 tools/perf/util/thread.h                      |  14 +-
 57 files changed, 792 insertions(+), 536 deletions(-)
 delete mode 100644 tools/perf/arch/alpha/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/alpha/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/alpha/include/syscall_table.h
 delete mode 100644 tools/perf/arch/arc/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/arc/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/arc/include/syscall_table.h
 delete mode 100644 tools/perf/arch/arm/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/arm/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/arm/include/syscall_table.h
 delete mode 100644 tools/perf/arch/arm64/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/arm64/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/arm64/include/syscall_table.h
 delete mode 100644 tools/perf/arch/csky/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/csky/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/csky/include/syscall_table.h
 delete mode 100644 tools/perf/arch/loongarch/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/loongarch/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/loongarch/include/syscall_table.h
 delete mode 100644 tools/perf/arch/mips/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/mips/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/mips/include/syscall_table.h
 delete mode 100644 tools/perf/arch/parisc/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/parisc/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/parisc/include/syscall_table.h
 delete mode 100644 tools/perf/arch/powerpc/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/powerpc/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/powerpc/include/syscall_table.h
 delete mode 100644 tools/perf/arch/riscv/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/riscv/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/riscv/include/syscall_table.h
 delete mode 100644 tools/perf/arch/s390/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/s390/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/s390/include/syscall_table.h
 delete mode 100644 tools/perf/arch/sh/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/sh/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/sh/include/syscall_table.h
 delete mode 100644 tools/perf/arch/sparc/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/sparc/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/sparc/include/syscall_table.h
 delete mode 100644 tools/perf/arch/x86/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/x86/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/x86/include/syscall_table.h
 delete mode 100644 tools/perf/arch/xtensa/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/xtensa/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/xtensa/include/syscall_table.h
 delete mode 100644 tools/perf/scripts/Makefile.syscalls
 delete mode 100755 tools/perf/scripts/syscalltbl.sh
 create mode 100755 tools/perf/trace/beauty/syscalltbl.sh

-- 
2.49.0.rc0.332.g42c0ae87b1-goog

[PATCH v5 01/11] perf dso: Move libunwind dso_data variables into ifdef

[Ian Rogers]

The variables elf_base_addr, debug_frame_offset, eh_frame_hdr_addr and
eh_frame_hdr_offset are only accessed in unwind-libunwind-local.c
which is conditionally built on having libunwind support. Make the
variables conditional on libunwind support too.

Reviewed-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/util/dso.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index bb8e8f444054..dfd763a0bd9d 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -154,10 +154,12 @@ struct dso_data {
 	int		 status;
 	u32		 status_seen;
 	u64		 file_size;
+#ifdef HAVE_LIBUNWIND_SUPPORT
 	u64		 elf_base_addr;
 	u64		 debug_frame_offset;
 	u64		 eh_frame_hdr_addr;
 	u64		 eh_frame_hdr_offset;
+#endif
 };
 
 struct dso_bpf_prog {
-- 
2.49.0.rc0.332.g42c0ae87b1-goog

[PATCH v5 02/11] perf dso: kernel-doc for enum dso_binary_type

[Ian Rogers]

There are many and non-obvious meanings to the dso_binary_type enum
values. Add kernel-doc to speed interpretting their meanings.

Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/util/dso.h | 53 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index dfd763a0bd9d..4aa8c3d36566 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -20,30 +20,83 @@ struct perf_env;
 #define DSO__NAME_KALLSYMS	"[kernel.kallsyms]"
 #define DSO__NAME_KCORE		"[kernel.kcore]"
 
+/**
+ * enum dso_binary_type - The kind of DSO generally associated with a memory
+ *                        region (struct map).
+ */
 enum dso_binary_type {
+	/** @DSO_BINARY_TYPE__KALLSYMS: Symbols from /proc/kallsyms file. */
 	DSO_BINARY_TYPE__KALLSYMS = 0,
+	/** @DSO_BINARY_TYPE__GUEST_KALLSYMS: Guest /proc/kallsyms file. */
 	DSO_BINARY_TYPE__GUEST_KALLSYMS,
+	/** @DSO_BINARY_TYPE__VMLINUX: Path to kernel /boot/vmlinux file. */
 	DSO_BINARY_TYPE__VMLINUX,
+	/** @DSO_BINARY_TYPE__GUEST_VMLINUX: Path to guest kernel /boot/vmlinux file. */
 	DSO_BINARY_TYPE__GUEST_VMLINUX,
+	/** @DSO_BINARY_TYPE__JAVA_JIT: Symbols from /tmp/perf.map file. */
 	DSO_BINARY_TYPE__JAVA_JIT,
+	/**
+	 * @DSO_BINARY_TYPE__DEBUGLINK: Debug file readable from the file path
+	 * in the .gnu_debuglink ELF section of the dso.
+	 */
 	DSO_BINARY_TYPE__DEBUGLINK,
+	/**
+	 * @DSO_BINARY_TYPE__BUILD_ID_CACHE: File named after buildid located in
+	 * the buildid cache with an elf filename.
+	 */
 	DSO_BINARY_TYPE__BUILD_ID_CACHE,
+	/**
+	 * @DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO: File named after buildid
+	 * located in the buildid cache with a debug filename.
+	 */
 	DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO,
+	/**
+	 * @DSO_BINARY_TYPE__FEDORA_DEBUGINFO: Debug file in /usr/lib/debug
+	 * with .debug suffix.
+	 */
 	DSO_BINARY_TYPE__FEDORA_DEBUGINFO,
+	/** @DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: Debug file in /usr/lib/debug. */
 	DSO_BINARY_TYPE__UBUNTU_DEBUGINFO,
+	/**
+	 * @DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO: dso__long_name debuginfo
+	 * file in /usr/lib/debug/lib rather than the expected
+	 * /usr/lib/debug/usr/lib.
+	 */
 	DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO,
+	/**
+	 * @DSO_BINARY_TYPE__BUILDID_DEBUGINFO: File named after buildid located
+	 * in /usr/lib/debug/.build-id/.
+	 */
 	DSO_BINARY_TYPE__BUILDID_DEBUGINFO,
+	/** @DSO_BINARY_TYPE__SYSTEM_PATH_DSO: A regular executable/shared-object file. */
 	DSO_BINARY_TYPE__SYSTEM_PATH_DSO,
+	/** @DSO_BINARY_TYPE__GUEST_KMODULE: Guest kernel module .ko file. */
 	DSO_BINARY_TYPE__GUEST_KMODULE,
+	/** @DSO_BINARY_TYPE__GUEST_KMODULE_COMP: Guest kernel module .ko.gz file. */
 	DSO_BINARY_TYPE__GUEST_KMODULE_COMP,
+	/** @DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: Kernel module .ko file. */
 	DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE,
+	/** @DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: Kernel module .ko.gz file. */
 	DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP,
+	/** @DSO_BINARY_TYPE__KCORE: /proc/kcore file. */
 	DSO_BINARY_TYPE__KCORE,
+	/** @DSO_BINARY_TYPE__GUEST_KCORE: Guest /proc/kcore file. */
 	DSO_BINARY_TYPE__GUEST_KCORE,
+	/**
+	 * @DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: Openembedded/Yocto -dbg
+	 * package debug info.
+	 */
 	DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO,
+	/** @DSO_BINARY_TYPE__BPF_PROG_INFO: jitted BPF code. */
 	DSO_BINARY_TYPE__BPF_PROG_INFO,
+	/** @DSO_BINARY_TYPE__BPF_IMAGE: jitted BPF trampoline or dispatcher code. */
 	DSO_BINARY_TYPE__BPF_IMAGE,
+	/**
+	 * @DSO_BINARY_TYPE__OOL: out of line code such as kprobe-replaced
+	 * instructions or optimized kprobes or ftrace trampolines.
+	 */
 	DSO_BINARY_TYPE__OOL,
+	/** @DSO_BINARY_TYPE__NOT_FOUND: Unknown DSO kind. */
 	DSO_BINARY_TYPE__NOT_FOUND,
 };
 
-- 
2.49.0.rc0.332.g42c0ae87b1-goog

[PATCH v5 03/11] perf syscalltbl: Remove syscall_table.h

[Ian Rogers]

The definition of "static const char *const syscalltbl[] = {" is done
in a generated syscalls_32.h or syscalls_64.h that is architecture
dependent. In order to include the appropriate file a syscall_table.h
is found via the perf include path and it includes the syscalls_32.h
or syscalls_64.h as appropriate.

To support having multiple syscall tables, one for 32-bit and one for
64-bit, or for different architectures, an include path cannot be
used. Remove syscall_table.h because of this and inline what it does
into syscalltbl.c.

For architectures without a syscall_table.h this will cause a failure
to include either syscalls_32.h or syscalls_64.h rather than a failure
to include syscall_table.h. For architectures that only included one
or other, the behavior matches BITS_PER_LONG as previously done on
architectures supporting both syscalls_32.h and syscalls_64.h.

Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Howard Chu <howardchu95@gmail.com>
Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>
---
 tools/perf/arch/alpha/include/syscall_table.h     | 2 --
 tools/perf/arch/arc/include/syscall_table.h       | 2 --
 tools/perf/arch/arm/include/syscall_table.h       | 2 --
 tools/perf/arch/arm64/include/syscall_table.h     | 8 --------
 tools/perf/arch/csky/include/syscall_table.h      | 2 --
 tools/perf/arch/loongarch/include/syscall_table.h | 2 --
 tools/perf/arch/mips/include/syscall_table.h      | 2 --
 tools/perf/arch/parisc/include/syscall_table.h    | 8 --------
 tools/perf/arch/powerpc/include/syscall_table.h   | 8 --------
 tools/perf/arch/riscv/include/syscall_table.h     | 8 --------
 tools/perf/arch/s390/include/syscall_table.h      | 2 --
 tools/perf/arch/sh/include/syscall_table.h        | 2 --
 tools/perf/arch/sparc/include/syscall_table.h     | 8 --------
 tools/perf/arch/x86/include/syscall_table.h       | 8 --------
 tools/perf/arch/xtensa/include/syscall_table.h    | 2 --
 tools/perf/util/syscalltbl.c                      | 8 +++++++-
 16 files changed, 7 insertions(+), 67 deletions(-)
 delete mode 100644 tools/perf/arch/alpha/include/syscall_table.h
 delete mode 100644 tools/perf/arch/arc/include/syscall_table.h
 delete mode 100644 tools/perf/arch/arm/include/syscall_table.h
 delete mode 100644 tools/perf/arch/arm64/include/syscall_table.h
 delete mode 100644 tools/perf/arch/csky/include/syscall_table.h
 delete mode 100644 tools/perf/arch/loongarch/include/syscall_table.h
 delete mode 100644 tools/perf/arch/mips/include/syscall_table.h
 delete mode 100644 tools/perf/arch/parisc/include/syscall_table.h
 delete mode 100644 tools/perf/arch/powerpc/include/syscall_table.h
 delete mode 100644 tools/perf/arch/riscv/include/syscall_table.h
 delete mode 100644 tools/perf/arch/s390/include/syscall_table.h
 delete mode 100644 tools/perf/arch/sh/include/syscall_table.h
 delete mode 100644 tools/perf/arch/sparc/include/syscall_table.h
 delete mode 100644 tools/perf/arch/x86/include/syscall_table.h
 delete mode 100644 tools/perf/arch/xtensa/include/syscall_table.h

diff --git a/tools/perf/arch/alpha/include/syscall_table.h b/tools/perf/arch/alpha/include/syscall_table.h
deleted file mode 100644
index b53e31c15805..000000000000
--- a/tools/perf/arch/alpha/include/syscall_table.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/syscalls_64.h>
diff --git a/tools/perf/arch/arc/include/syscall_table.h b/tools/perf/arch/arc/include/syscall_table.h
deleted file mode 100644
index 4c942821662d..000000000000
--- a/tools/perf/arch/arc/include/syscall_table.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/syscalls_32.h>
diff --git a/tools/perf/arch/arm/include/syscall_table.h b/tools/perf/arch/arm/include/syscall_table.h
deleted file mode 100644
index 4c942821662d..000000000000
--- a/tools/perf/arch/arm/include/syscall_table.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/syscalls_32.h>
diff --git a/tools/perf/arch/arm64/include/syscall_table.h b/tools/perf/arch/arm64/include/syscall_table.h
deleted file mode 100644
index 7ff51b783000..000000000000
--- a/tools/perf/arch/arm64/include/syscall_table.h
+++ /dev/null
@@ -1,8 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/bitsperlong.h>
-
-#if __BITS_PER_LONG == 64
-#include <asm/syscalls_64.h>
-#else
-#include <asm/syscalls_32.h>
-#endif
diff --git a/tools/perf/arch/csky/include/syscall_table.h b/tools/perf/arch/csky/include/syscall_table.h
deleted file mode 100644
index 4c942821662d..000000000000
--- a/tools/perf/arch/csky/include/syscall_table.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/syscalls_32.h>
diff --git a/tools/perf/arch/loongarch/include/syscall_table.h b/tools/perf/arch/loongarch/include/syscall_table.h
deleted file mode 100644
index 9d0646d3455c..000000000000
--- a/tools/perf/arch/loongarch/include/syscall_table.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/syscall_table_64.h>
diff --git a/tools/perf/arch/mips/include/syscall_table.h b/tools/perf/arch/mips/include/syscall_table.h
deleted file mode 100644
index b53e31c15805..000000000000
--- a/tools/perf/arch/mips/include/syscall_table.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/syscalls_64.h>
diff --git a/tools/perf/arch/parisc/include/syscall_table.h b/tools/perf/arch/parisc/include/syscall_table.h
deleted file mode 100644
index 7ff51b783000..000000000000
--- a/tools/perf/arch/parisc/include/syscall_table.h
+++ /dev/null
@@ -1,8 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/bitsperlong.h>
-
-#if __BITS_PER_LONG == 64
-#include <asm/syscalls_64.h>
-#else
-#include <asm/syscalls_32.h>
-#endif
diff --git a/tools/perf/arch/powerpc/include/syscall_table.h b/tools/perf/arch/powerpc/include/syscall_table.h
deleted file mode 100644
index 7ff51b783000..000000000000
--- a/tools/perf/arch/powerpc/include/syscall_table.h
+++ /dev/null
@@ -1,8 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/bitsperlong.h>
-
-#if __BITS_PER_LONG == 64
-#include <asm/syscalls_64.h>
-#else
-#include <asm/syscalls_32.h>
-#endif
diff --git a/tools/perf/arch/riscv/include/syscall_table.h b/tools/perf/arch/riscv/include/syscall_table.h
deleted file mode 100644
index 7ff51b783000..000000000000
--- a/tools/perf/arch/riscv/include/syscall_table.h
+++ /dev/null
@@ -1,8 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/bitsperlong.h>
-
-#if __BITS_PER_LONG == 64
-#include <asm/syscalls_64.h>
-#else
-#include <asm/syscalls_32.h>
-#endif
diff --git a/tools/perf/arch/s390/include/syscall_table.h b/tools/perf/arch/s390/include/syscall_table.h
deleted file mode 100644
index b53e31c15805..000000000000
--- a/tools/perf/arch/s390/include/syscall_table.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/syscalls_64.h>
diff --git a/tools/perf/arch/sh/include/syscall_table.h b/tools/perf/arch/sh/include/syscall_table.h
deleted file mode 100644
index 4c942821662d..000000000000
--- a/tools/perf/arch/sh/include/syscall_table.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/syscalls_32.h>
diff --git a/tools/perf/arch/sparc/include/syscall_table.h b/tools/perf/arch/sparc/include/syscall_table.h
deleted file mode 100644
index 7ff51b783000..000000000000
--- a/tools/perf/arch/sparc/include/syscall_table.h
+++ /dev/null
@@ -1,8 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/bitsperlong.h>
-
-#if __BITS_PER_LONG == 64
-#include <asm/syscalls_64.h>
-#else
-#include <asm/syscalls_32.h>
-#endif
diff --git a/tools/perf/arch/x86/include/syscall_table.h b/tools/perf/arch/x86/include/syscall_table.h
deleted file mode 100644
index 7ff51b783000..000000000000
--- a/tools/perf/arch/x86/include/syscall_table.h
+++ /dev/null
@@ -1,8 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/bitsperlong.h>
-
-#if __BITS_PER_LONG == 64
-#include <asm/syscalls_64.h>
-#else
-#include <asm/syscalls_32.h>
-#endif
diff --git a/tools/perf/arch/xtensa/include/syscall_table.h b/tools/perf/arch/xtensa/include/syscall_table.h
deleted file mode 100644
index 4c942821662d..000000000000
--- a/tools/perf/arch/xtensa/include/syscall_table.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#include <asm/syscalls_32.h>
diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c
index 928aca4cd6e9..2f76241494c8 100644
--- a/tools/perf/util/syscalltbl.c
+++ b/tools/perf/util/syscalltbl.c
@@ -7,13 +7,19 @@
 
 #include "syscalltbl.h"
 #include <stdlib.h>
+#include <asm/bitsperlong.h>
 #include <linux/compiler.h>
 #include <linux/zalloc.h>
 
 #include <string.h>
 #include "string2.h"
 
-#include <syscall_table.h>
+#if __BITS_PER_LONG == 64
+  #include <asm/syscalls_64.h>
+#else
+  #include <asm/syscalls_32.h>
+#endif
+
 const int syscalltbl_native_max_id = SYSCALLTBL_MAX_ID;
 static const char *const *syscalltbl_native = syscalltbl;
 
-- 
2.49.0.rc0.332.g42c0ae87b1-goog

[PATCH v5 04/11] perf trace: Reorganize syscalls

[Ian Rogers]

Identify struct syscall information in the syscalls table by a machine
type and syscall number, not just system call number. Having the
machine type means that 32-bit system calls can be differentiated from
64-bit ones on a machine capable of both. Having a table for all
machine types and all system call numbers would be too large, so
maintain a sorted array of system calls as they are encountered.

Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Howard Chu <howardchu95@gmail.com>
Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>
---
 tools/perf/builtin-trace.c | 177 ++++++++++++++++++++++++-------------
 1 file changed, 118 insertions(+), 59 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 092c5f6404ba..f7d035dc0e00 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -66,6 +66,7 @@
 #include "syscalltbl.h"
 #include "../perf.h"
 #include "trace_augment.h"
+#include "dwarf-regs.h"
 
 #include <errno.h>
 #include <inttypes.h>
@@ -86,6 +87,7 @@
 
 #include <linux/ctype.h>
 #include <perf/mmap.h>
+#include <tools/libc_compat.h>
 
 #ifdef HAVE_LIBTRACEEVENT
 #include <event-parse.h>
@@ -149,7 +151,10 @@ struct trace {
 	struct perf_tool	tool;
 	struct syscalltbl	*sctbl;
 	struct {
+		/** Sorted sycall numbers used by the trace. */
 		struct syscall  *table;
+		/** Size of table. */
+		size_t		table_size;
 		struct {
 			struct evsel *sys_enter,
 				*sys_exit,
@@ -1454,22 +1459,37 @@ static const struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias)
 	return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias);
 }
 
-/*
- * is_exit: is this "exit" or "exit_group"?
- * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter.
- * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc.
- * nonexistent: Just a hole in the syscall table, syscall id not allocated
+/**
+ * struct syscall
  */
 struct syscall {
+	/** @e_machine: The ELF machine associated with the entry. */
+	int e_machine;
+	/** @id: id value from the tracepoint, the system call number. */
+	int id;
 	struct tep_event    *tp_format;
 	int		    nr_args;
+	/**
+	 * @args_size: sum of the sizes of the syscall arguments, anything
+	 * after that is augmented stuff: pathname for openat, etc.
+	 */
+
 	int		    args_size;
 	struct {
 		struct bpf_program *sys_enter,
 				   *sys_exit;
 	}		    bpf_prog;
+	/** @is_exit: is this "exit" or "exit_group"? */
 	bool		    is_exit;
+	/**
+	 * @is_open: is this "open" or "openat"? To associate the fd returned in
+	 * sys_exit with the pathname in sys_enter.
+	 */
 	bool		    is_open;
+	/**
+	 * @nonexistent: Name lookup failed. Just a hole in the syscall table,
+	 * syscall id not allocated.
+	 */
 	bool		    nonexistent;
 	bool		    use_btf;
 	struct tep_format_field *args;
@@ -2107,22 +2127,21 @@ static int syscall__set_arg_fmts(struct syscall *sc)
 	return 0;
 }
 
-static int trace__read_syscall_info(struct trace *trace, int id)
+static int syscall__read_info(struct syscall *sc, struct trace *trace)
 {
 	char tp_name[128];
-	struct syscall *sc;
-	const char *name = syscalltbl__name(trace->sctbl, id);
+	const char *name;
 	int err;
 
-	if (trace->syscalls.table == NULL) {
-		trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc));
-		if (trace->syscalls.table == NULL)
-			return -ENOMEM;
-	}
-	sc = trace->syscalls.table + id;
 	if (sc->nonexistent)
 		return -EEXIST;
 
+	if (sc->name) {
+		/* Info already read. */
+		return 0;
+	}
+
+	name = syscalltbl__name(trace->sctbl, sc->id);
 	if (name == NULL) {
 		sc->nonexistent = true;
 		return -EEXIST;
@@ -2145,15 +2164,16 @@ static int trace__read_syscall_info(struct trace *trace, int id)
 	 */
 	if (IS_ERR(sc->tp_format)) {
 		sc->nonexistent = true;
-		return PTR_ERR(sc->tp_format);
+		err = PTR_ERR(sc->tp_format);
+		sc->tp_format = NULL;
+		return err;
 	}
 
 	/*
 	 * The tracepoint format contains __syscall_nr field, so it's one more
 	 * than the actual number of syscall arguments.
 	 */
-	if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ?
-					RAW_SYSCALL_ARGS_NUM : sc->tp_format->format.nr_fields - 1))
+	if (syscall__alloc_arg_fmts(sc, sc->tp_format->format.nr_fields - 1))
 		return -ENOMEM;
 
 	sc->args = sc->tp_format->format.fields;
@@ -2442,13 +2462,67 @@ static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size,
 	return printed;
 }
 
+static void syscall__init(struct syscall *sc, int e_machine, int id)
+{
+	memset(sc, 0, sizeof(*sc));
+	sc->e_machine = e_machine;
+	sc->id = id;
+}
+
+static void syscall__exit(struct syscall *sc)
+{
+	if (!sc)
+		return;
+
+	zfree(&sc->arg_fmt);
+}
+
+static int syscall__cmp(const void *va, const void *vb)
+{
+	const struct syscall *a = va, *b = vb;
+
+	if (a->e_machine != b->e_machine)
+		return a->e_machine - b->e_machine;
+
+	return a->id - b->id;
+}
+
+static struct syscall *trace__find_syscall(struct trace *trace, int e_machine, int id)
+{
+	struct syscall key = {
+		.e_machine = e_machine,
+		.id = id,
+	};
+	struct syscall *sc, *tmp;
+
+	sc = bsearch(&key, trace->syscalls.table, trace->syscalls.table_size,
+		     sizeof(struct syscall), syscall__cmp);
+	if (sc)
+		return sc;
+
+	tmp = reallocarray(trace->syscalls.table, trace->syscalls.table_size + 1,
+			   sizeof(struct syscall));
+	if (!tmp)
+		return NULL;
+
+	trace->syscalls.table = tmp;
+	sc = &trace->syscalls.table[trace->syscalls.table_size++];
+	syscall__init(sc, e_machine, id);
+	qsort(trace->syscalls.table, trace->syscalls.table_size, sizeof(struct syscall),
+	      syscall__cmp);
+	sc = bsearch(&key, trace->syscalls.table, trace->syscalls.table_size,
+		     sizeof(struct syscall), syscall__cmp);
+	return sc;
+}
+
 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel,
 				  union perf_event *event,
 				  struct perf_sample *sample);
 
-static struct syscall *trace__syscall_info(struct trace *trace,
-					   struct evsel *evsel, int id)
+static struct syscall *trace__syscall_info(struct trace *trace, struct evsel *evsel,
+					   int e_machine, int id)
 {
+	struct syscall *sc;
 	int err = 0;
 
 	if (id < 0) {
@@ -2473,28 +2547,20 @@ static struct syscall *trace__syscall_info(struct trace *trace,
 
 	err = -EINVAL;
 
-	if (id > trace->sctbl->syscalls.max_id) {
-		goto out_cant_read;
-	}
-
-	if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) &&
-	    (err = trace__read_syscall_info(trace, id)) != 0)
-		goto out_cant_read;
+	sc = trace__find_syscall(trace, e_machine, id);
+	if (sc)
+		err = syscall__read_info(sc, trace);
 
-	if (trace->syscalls.table && trace->syscalls.table[id].nonexistent)
-		goto out_cant_read;
-
-	return &trace->syscalls.table[id];
-
-out_cant_read:
-	if (verbose > 0) {
+	if (err && verbose > 0) {
 		char sbuf[STRERR_BUFSIZE];
-		fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf)));
-		if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL)
-			fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
+
+		fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err,
+			str_error_r(-err, sbuf, sizeof(sbuf)));
+		if (sc && sc->name)
+			fprintf(trace->output, "(%s)", sc->name);
 		fputs(" information\n", trace->output);
 	}
-	return NULL;
+	return err ? NULL : sc;
 }
 
 struct syscall_stats {
@@ -2643,14 +2709,6 @@ static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sam
 	return NULL;
 }
 
-static void syscall__exit(struct syscall *sc)
-{
-	if (!sc)
-		return;
-
-	zfree(&sc->arg_fmt);
-}
-
 static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
 			    union perf_event *event __maybe_unused,
 			    struct perf_sample *sample)
@@ -2662,7 +2720,7 @@ static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
 	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
 	int augmented_args_size = 0;
 	void *augmented_args = NULL;
-	struct syscall *sc = trace__syscall_info(trace, evsel, id);
+	struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id);
 	struct thread_trace *ttrace;
 
 	if (sc == NULL)
@@ -2736,7 +2794,7 @@ static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
 	struct thread_trace *ttrace;
 	struct thread *thread;
 	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
-	struct syscall *sc = trace__syscall_info(trace, evsel, id);
+	struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id);
 	char msg[1024];
 	void *args, *augmented_args = NULL;
 	int augmented_args_size;
@@ -2811,7 +2869,7 @@ static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
 	struct thread *thread;
 	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
 	int alignment = trace->args_alignment;
-	struct syscall *sc = trace__syscall_info(trace, evsel, id);
+	struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id);
 	struct thread_trace *ttrace;
 
 	if (sc == NULL)
@@ -3164,7 +3222,7 @@ static int trace__event_handler(struct trace *trace, struct evsel *evsel,
 
 	if (evsel == trace->syscalls.events.bpf_output) {
 		int id = perf_evsel__sc_tp_uint(evsel, id, sample);
-		struct syscall *sc = trace__syscall_info(trace, evsel, id);
+		struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id);
 
 		if (sc) {
 			fprintf(trace->output, "%s(", sc->name);
@@ -3673,7 +3731,7 @@ static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, str
 
 static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
 {
-	struct syscall *sc = trace__syscall_info(trace, NULL, id);
+	struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, id);
 
 	if (sc == NULL)
 		return;
@@ -3684,20 +3742,20 @@ static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
 
 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
 {
-	struct syscall *sc = trace__syscall_info(trace, NULL, id);
+	struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, id);
 	return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->skel->progs.syscall_unaugmented);
 }
 
 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
 {
-	struct syscall *sc = trace__syscall_info(trace, NULL, id);
+	struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, id);
 	return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->skel->progs.syscall_unaugmented);
 }
 
 static int trace__bpf_sys_enter_beauty_map(struct trace *trace, int key, unsigned int *beauty_array)
 {
 	struct tep_format_field *field;
-	struct syscall *sc = trace__syscall_info(trace, NULL, key);
+	struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, key);
 	const struct btf_type *bt;
 	char *struct_offset, *tmp, name[32];
 	bool can_augment = false;
@@ -3795,7 +3853,7 @@ static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace
 try_to_find_pair:
 	for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) {
 		int id = syscalltbl__id_at_idx(trace->sctbl, i);
-		struct syscall *pair = trace__syscall_info(trace, NULL, id);
+		struct syscall *pair = trace__syscall_info(trace, NULL, EM_HOST, id);
 		struct bpf_program *pair_prog;
 		bool is_candidate = false;
 
@@ -3945,7 +4003,7 @@ static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
 	 */
 	for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) {
 		int key = syscalltbl__id_at_idx(trace->sctbl, i);
-		struct syscall *sc = trace__syscall_info(trace, NULL, key);
+		struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, key);
 		struct bpf_program *pair_prog;
 		int prog_fd;
 
@@ -4761,7 +4819,10 @@ static size_t syscall__dump_stats(struct trace *trace, FILE *fp,
 			pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0;
 			avg /= NSEC_PER_MSEC;
 
-			sc = &trace->syscalls.table[entry->syscall];
+			sc = trace__syscall_info(trace, /*evsel=*/NULL, EM_HOST, entry->syscall);
+			if (!sc)
+				continue;
+
 			printed += fprintf(fp, "   %-15s", sc->name);
 			printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f",
 					   n, stats->nr_failures, entry->msecs, min, avg);
@@ -5218,12 +5279,10 @@ static int trace__config(const char *var, const char *value, void *arg)
 
 static void trace__exit(struct trace *trace)
 {
-	int i;
-
 	strlist__delete(trace->ev_qualifier);
 	zfree(&trace->ev_qualifier_ids.entries);
 	if (trace->syscalls.table) {
-		for (i = 0; i <= trace->sctbl->syscalls.max_id; i++)
+		for (size_t i = 0; i < trace->syscalls.table_size; i++)
 			syscall__exit(&trace->syscalls.table[i]);
 		zfree(&trace->syscalls.table);
 	}
-- 
2.49.0.rc0.332.g42c0ae87b1-goog

[PATCH v5 05/11] perf syscalltbl: Remove struct syscalltbl

[Ian Rogers]

The syscalltbl held entries of system call name and number pairs,
generated from a native syscalltbl at start up. As there are gaps in
the system call number there is a notion of index into the
table. Going forward we want the system call table to be identifiable
by a machine type, for example, i386 vs x86-64. Change the interface
to the syscalltbl so (1) a (currently unused machine type of EM_HOST)
is passed (2) the index to syscall number and system call name mapping
is computed at build time.

Two tables are used for this, an array of system call number to name,
an array of system call numbers sorted by the system call name. The
sorted array doesn't store strings in part to save memory and
relocations. The index notion is carried forward and is an index into
the sorted array of system call numbers, the data structures are
opaque (held only in syscalltbl.c), and so the number of indices for a
machine type is exposed as a new API.

The arrays are computed in the syscalltbl.sh script and so no start-up
time computation and storage is necessary.

Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Howard Chu <howardchu95@gmail.com>
Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>
---
 tools/perf/builtin-trace.c       | 106 +++++++++++++++++------------
 tools/perf/scripts/syscalltbl.sh |  36 ++++------
 tools/perf/util/syscalltbl.c     | 113 ++++++++++---------------------
 tools/perf/util/syscalltbl.h     |  22 ++----
 4 files changed, 117 insertions(+), 160 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index f7d035dc0e00..cfc8cb8cbef8 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -149,7 +149,6 @@ enum summary_mode {
 
 struct trace {
 	struct perf_tool	tool;
-	struct syscalltbl	*sctbl;
 	struct {
 		/** Sorted sycall numbers used by the trace. */
 		struct syscall  *table;
@@ -188,6 +187,14 @@ struct trace {
 		pid_t		*entries;
 		struct bpf_map  *map;
 	}			filter_pids;
+	/*
+	 * TODO: The map is from an ID (aka system call number) to struct
+	 * syscall_stats. If there is >1 e_machine, such as i386 and x86-64
+	 * processes, then the stats here will gather wrong the statistics for
+	 * the non EM_HOST system calls. A fix would be to add the e_machine
+	 * into the key, but this would make the code inconsistent with the
+	 * per-thread version.
+	 */
 	struct hashmap		*syscall_stats;
 	double			duration_filter;
 	double			runtime_ms;
@@ -2141,7 +2148,7 @@ static int syscall__read_info(struct syscall *sc, struct trace *trace)
 		return 0;
 	}
 
-	name = syscalltbl__name(trace->sctbl, sc->id);
+	name = syscalltbl__name(sc->e_machine, sc->id);
 	if (name == NULL) {
 		sc->nonexistent = true;
 		return -EEXIST;
@@ -2241,10 +2248,14 @@ static int trace__validate_ev_qualifier(struct trace *trace)
 
 	strlist__for_each_entry(pos, trace->ev_qualifier) {
 		const char *sc = pos->s;
-		int id = syscalltbl__id(trace->sctbl, sc), match_next = -1;
+		/*
+		 * TODO: Assume more than the validation/warnings are all for
+		 * the same binary type as perf.
+		 */
+		int id = syscalltbl__id(EM_HOST, sc), match_next = -1;
 
 		if (id < 0) {
-			id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next);
+			id = syscalltbl__strglobmatch_first(EM_HOST, sc, &match_next);
 			if (id >= 0)
 				goto matches;
 
@@ -2264,7 +2275,7 @@ static int trace__validate_ev_qualifier(struct trace *trace)
 			continue;
 
 		while (1) {
-			id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next);
+			id = syscalltbl__strglobmatch_next(EM_HOST, sc, &match_next);
 			if (id < 0)
 				break;
 			if (nr_allocated == nr_used) {
@@ -2720,6 +2731,7 @@ static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
 	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
 	int augmented_args_size = 0;
 	void *augmented_args = NULL;
+	/* TODO: get e_machine from thread. */
 	struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id);
 	struct thread_trace *ttrace;
 
@@ -2794,6 +2806,7 @@ static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
 	struct thread_trace *ttrace;
 	struct thread *thread;
 	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
+	/* TODO: get e_machine from thread. */
 	struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id);
 	char msg[1024];
 	void *args, *augmented_args = NULL;
@@ -2869,6 +2882,7 @@ static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
 	struct thread *thread;
 	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
 	int alignment = trace->args_alignment;
+	/* TODO: get e_machine from thread. */
 	struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id);
 	struct thread_trace *ttrace;
 
@@ -3222,6 +3236,7 @@ static int trace__event_handler(struct trace *trace, struct evsel *evsel,
 
 	if (evsel == trace->syscalls.events.bpf_output) {
 		int id = perf_evsel__sc_tp_uint(evsel, id, sample);
+		/* TODO: get e_machine from thread. */
 		struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id);
 
 		if (sc) {
@@ -3729,9 +3744,9 @@ static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, str
 	return trace->skel->progs.syscall_unaugmented;
 }
 
-static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
+static void trace__init_syscall_bpf_progs(struct trace *trace, int e_machine, int id)
 {
-	struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, id);
+	struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, id);
 
 	if (sc == NULL)
 		return;
@@ -3740,22 +3755,22 @@ static void trace__init_syscall_bpf_progs(struct trace *trace, int id)
 	sc->bpf_prog.sys_exit  = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit  : NULL,  "exit");
 }
 
-static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id)
+static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int e_machine, int id)
 {
-	struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, id);
+	struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, id);
 	return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->skel->progs.syscall_unaugmented);
 }
 
-static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id)
+static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int e_machine, int id)
 {
-	struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, id);
+	struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, id);
 	return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->skel->progs.syscall_unaugmented);
 }
 
-static int trace__bpf_sys_enter_beauty_map(struct trace *trace, int key, unsigned int *beauty_array)
+static int trace__bpf_sys_enter_beauty_map(struct trace *trace, int e_machine, int key, unsigned int *beauty_array)
 {
 	struct tep_format_field *field;
-	struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, key);
+	struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, key);
 	const struct btf_type *bt;
 	char *struct_offset, *tmp, name[32];
 	bool can_augment = false;
@@ -3851,9 +3866,9 @@ static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace
 	return NULL;
 
 try_to_find_pair:
-	for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) {
-		int id = syscalltbl__id_at_idx(trace->sctbl, i);
-		struct syscall *pair = trace__syscall_info(trace, NULL, EM_HOST, id);
+	for (int i = 0, num_idx = syscalltbl__num_idx(sc->e_machine); i < num_idx; ++i) {
+		int id = syscalltbl__id_at_idx(sc->e_machine, i);
+		struct syscall *pair = trace__syscall_info(trace, NULL, sc->e_machine, id);
 		struct bpf_program *pair_prog;
 		bool is_candidate = false;
 
@@ -3937,7 +3952,7 @@ static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace
 	return NULL;
 }
 
-static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
+static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace, int e_machine)
 {
 	int map_enter_fd = bpf_map__fd(trace->skel->maps.syscalls_sys_enter);
 	int map_exit_fd  = bpf_map__fd(trace->skel->maps.syscalls_sys_exit);
@@ -3945,27 +3960,27 @@ static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
 	int err = 0;
 	unsigned int beauty_array[6];
 
-	for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) {
-		int prog_fd, key = syscalltbl__id_at_idx(trace->sctbl, i);
+	for (int i = 0, num_idx = syscalltbl__num_idx(e_machine); i < num_idx; ++i) {
+		int prog_fd, key = syscalltbl__id_at_idx(e_machine, i);
 
 		if (!trace__syscall_enabled(trace, key))
 			continue;
 
-		trace__init_syscall_bpf_progs(trace, key);
+		trace__init_syscall_bpf_progs(trace, e_machine, key);
 
 		// It'll get at least the "!raw_syscalls:unaugmented"
-		prog_fd = trace__bpf_prog_sys_enter_fd(trace, key);
+		prog_fd = trace__bpf_prog_sys_enter_fd(trace, e_machine, key);
 		err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY);
 		if (err)
 			break;
-		prog_fd = trace__bpf_prog_sys_exit_fd(trace, key);
+		prog_fd = trace__bpf_prog_sys_exit_fd(trace, e_machine, key);
 		err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY);
 		if (err)
 			break;
 
 		/* use beauty_map to tell BPF how many bytes to collect, set beauty_map's value here */
 		memset(beauty_array, 0, sizeof(beauty_array));
-		err = trace__bpf_sys_enter_beauty_map(trace, key, (unsigned int *)beauty_array);
+		err = trace__bpf_sys_enter_beauty_map(trace, e_machine, key, (unsigned int *)beauty_array);
 		if (err)
 			continue;
 		err = bpf_map_update_elem(beauty_map_fd, &key, beauty_array, BPF_ANY);
@@ -4001,9 +4016,9 @@ static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace)
 	 * first and second arg (this one on the raw_syscalls:sys_exit prog
 	 * array tail call, then that one will be used.
 	 */
-	for (int i = 0; i < trace->sctbl->syscalls.nr_entries; ++i) {
-		int key = syscalltbl__id_at_idx(trace->sctbl, i);
-		struct syscall *sc = trace__syscall_info(trace, NULL, EM_HOST, key);
+	for (int i = 0, num_idx = syscalltbl__num_idx(e_machine); i < num_idx; ++i) {
+		int key = syscalltbl__id_at_idx(e_machine, i);
+		struct syscall *sc = trace__syscall_info(trace, NULL, e_machine, key);
 		struct bpf_program *pair_prog;
 		int prog_fd;
 
@@ -4449,8 +4464,13 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
 		goto out_error_mem;
 
 #ifdef HAVE_BPF_SKEL
-	if (trace->skel && trace->skel->progs.sys_enter)
-		trace__init_syscalls_bpf_prog_array_maps(trace);
+	if (trace->skel && trace->skel->progs.sys_enter) {
+		/*
+		 * TODO: Initialize for all host binary machine types, not just
+		 * those matching the perf binary.
+		 */
+		trace__init_syscalls_bpf_prog_array_maps(trace, EM_HOST);
+	}
 #endif
 
 	if (trace->ev_qualifier_ids.nr > 0) {
@@ -4475,7 +4495,8 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
 	 *  So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is
 	 *  not in use.
 	 */
-	trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close"));
+	/* TODO: support for more than just perf binary machine type close. */
+	trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(EM_HOST, "close"));
 
 	err = trace__expand_filters(trace, &evsel);
 	if (err)
@@ -4788,7 +4809,7 @@ static struct syscall_entry *syscall__sort_stats(struct hashmap *syscall_stats)
 	return entry;
 }
 
-static size_t syscall__dump_stats(struct trace *trace, FILE *fp,
+static size_t syscall__dump_stats(struct trace *trace, int e_machine, FILE *fp,
 				  struct hashmap *syscall_stats)
 {
 	size_t printed = 0;
@@ -4819,7 +4840,7 @@ static size_t syscall__dump_stats(struct trace *trace, FILE *fp,
 			pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0;
 			avg /= NSEC_PER_MSEC;
 
-			sc = trace__syscall_info(trace, /*evsel=*/NULL, EM_HOST, entry->syscall);
+			sc = trace__syscall_info(trace, /*evsel=*/NULL, e_machine, entry->syscall);
 			if (!sc)
 				continue;
 
@@ -4846,14 +4867,14 @@ static size_t syscall__dump_stats(struct trace *trace, FILE *fp,
 }
 
 static size_t thread__dump_stats(struct thread_trace *ttrace,
-				 struct trace *trace, FILE *fp)
+				 struct trace *trace, int e_machine, FILE *fp)
 {
-	return syscall__dump_stats(trace, fp, ttrace->syscall_stats);
+	return syscall__dump_stats(trace, e_machine, fp, ttrace->syscall_stats);
 }
 
-static size_t system__dump_stats(struct trace *trace, FILE *fp)
+static size_t system__dump_stats(struct trace *trace, int e_machine, FILE *fp)
 {
-	return syscall__dump_stats(trace, fp, trace->syscall_stats);
+	return syscall__dump_stats(trace, e_machine, fp, trace->syscall_stats);
 }
 
 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace)
@@ -4879,7 +4900,8 @@ static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trac
 	else if (fputc('\n', fp) != EOF)
 		++printed;
 
-	printed += thread__dump_stats(ttrace, trace, fp);
+	/* TODO: get e_machine from thread. */
+	printed += thread__dump_stats(ttrace, trace, EM_HOST, fp);
 
 	return printed;
 }
@@ -4940,7 +4962,8 @@ static size_t trace__fprintf_total_summary(struct trace *trace, FILE *fp)
 	else if (fputc('\n', fp) != EOF)
 		++printed;
 
-	printed += system__dump_stats(trace, fp);
+	/* TODO: get all system e_machines. */
+	printed += system__dump_stats(trace, EM_HOST, fp);
 
 	return printed;
 }
@@ -5132,8 +5155,9 @@ static int trace__parse_events_option(const struct option *opt, const char *str,
 			*sep = '\0';
 
 		list = 0;
-		if (syscalltbl__id(trace->sctbl, s) >= 0 ||
-		    syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) {
+		/* TODO: support for more than just perf binary machine type syscalls. */
+		if (syscalltbl__id(EM_HOST, s) >= 0 ||
+		    syscalltbl__strglobmatch_first(EM_HOST, s, &idx) >= 0) {
 			list = 1;
 			goto do_concat;
 		}
@@ -5286,7 +5310,6 @@ static void trace__exit(struct trace *trace)
 			syscall__exit(&trace->syscalls.table[i]);
 		zfree(&trace->syscalls.table);
 	}
-	syscalltbl__delete(trace->sctbl);
 	zfree(&trace->perfconfig_events);
 }
 
@@ -5435,9 +5458,8 @@ int cmd_trace(int argc, const char **argv)
 	sigaction(SIGCHLD, &sigchld_act, NULL);
 
 	trace.evlist = evlist__new();
-	trace.sctbl = syscalltbl__new();
 
-	if (trace.evlist == NULL || trace.sctbl == NULL) {
+	if (trace.evlist == NULL) {
 		pr_err("Not enough memory to run!\n");
 		err = -ENOMEM;
 		goto out;
diff --git a/tools/perf/scripts/syscalltbl.sh b/tools/perf/scripts/syscalltbl.sh
index 1ce0d5aa8b50..a39b3013b103 100755
--- a/tools/perf/scripts/syscalltbl.sh
+++ b/tools/perf/scripts/syscalltbl.sh
@@ -50,37 +50,27 @@ fi
 infile="$1"
 outfile="$2"
 
-nxt=0
-
-syscall_macro() {
-    nr="$1"
-    name="$2"
-
-    echo "	[$nr] = \"$name\","
-}
-
-emit() {
-    nr="$1"
-    entry="$2"
-
-    syscall_macro "$nr" "$entry"
-}
-
-echo "static const char *const syscalltbl[] = {" > $outfile
-
 sorted_table=$(mktemp /tmp/syscalltbl.XXXXXX)
 grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | sort -n > $sorted_table
 
-max_nr=0
+echo "static const char *const syscall_num_to_name[] = {" > $outfile
 # the params are: nr abi name entry compat
 # use _ for intentionally unused variables according to SC2034
 while read nr _ name _ _; do
-    emit "$nr" "$name" >> $outfile
-    max_nr=$nr
+	echo "	[$nr] = \"$name\"," >> $outfile
 done < $sorted_table
+echo "};" >> $outfile
 
-rm -f $sorted_table
+echo "static const uint16_t syscall_sorted_names[] = {" >> $outfile
 
+# When sorting by name, add a suffix of 0s upto 20 characters so that system
+# calls that differ with a numerical suffix don't sort before those
+# without. This default behavior of sort differs from that of strcmp used at
+# runtime. Use sed to strip the trailing 0s suffix afterwards.
+grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | awk '{printf $3; for (i = length($3); i < 20; i++) { printf "0"; }; print " " $1}'| sort | sed 's/\([a-zA-Z1-9]\+\)0\+ \([0-9]\+\)/\1 \2/' > $sorted_table
+while read name nr; do
+	echo "	$nr,	/* $name */" >> $outfile
+done < $sorted_table
 echo "};" >> $outfile
 
-echo "#define SYSCALLTBL_MAX_ID ${max_nr}" >> $outfile
+rm -f $sorted_table
diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c
index 2f76241494c8..760ac4d0869f 100644
--- a/tools/perf/util/syscalltbl.c
+++ b/tools/perf/util/syscalltbl.c
@@ -9,6 +9,7 @@
 #include <stdlib.h>
 #include <asm/bitsperlong.h>
 #include <linux/compiler.h>
+#include <linux/kernel.h>
 #include <linux/zalloc.h>
 
 #include <string.h>
@@ -20,112 +21,66 @@
   #include <asm/syscalls_32.h>
 #endif
 
-const int syscalltbl_native_max_id = SYSCALLTBL_MAX_ID;
-static const char *const *syscalltbl_native = syscalltbl;
+const char *syscalltbl__name(int e_machine __maybe_unused, int id)
+{
+	if (id >= 0 && id <= (int)ARRAY_SIZE(syscall_num_to_name))
+		return syscall_num_to_name[id];
+	return NULL;
+}
 
-struct syscall {
-	int id;
+struct syscall_cmp_key {
 	const char *name;
+	const char *const *tbl;
 };
 
 static int syscallcmpname(const void *vkey, const void *ventry)
 {
-	const char *key = vkey;
-	const struct syscall *entry = ventry;
+	const struct syscall_cmp_key *key = vkey;
+	const uint16_t *entry = ventry;
 
-	return strcmp(key, entry->name);
+	return strcmp(key->name, key->tbl[*entry]);
 }
 
-static int syscallcmp(const void *va, const void *vb)
+int syscalltbl__id(int e_machine __maybe_unused, const char *name)
 {
-	const struct syscall *a = va, *b = vb;
-
-	return strcmp(a->name, b->name);
+	struct syscall_cmp_key key = {
+		.name = name,
+		.tbl = syscall_num_to_name,
+	};
+	const int *id = bsearch(&key, syscall_sorted_names,
+				ARRAY_SIZE(syscall_sorted_names),
+				sizeof(syscall_sorted_names[0]),
+				syscallcmpname);
+
+	return id ? *id : -1;
 }
 
-static int syscalltbl__init_native(struct syscalltbl *tbl)
+int syscalltbl__num_idx(int e_machine __maybe_unused)
 {
-	int nr_entries = 0, i, j;
-	struct syscall *entries;
-
-	for (i = 0; i <= syscalltbl_native_max_id; ++i)
-		if (syscalltbl_native[i])
-			++nr_entries;
-
-	entries = tbl->syscalls.entries = malloc(sizeof(struct syscall) * nr_entries);
-	if (tbl->syscalls.entries == NULL)
-		return -1;
-
-	for (i = 0, j = 0; i <= syscalltbl_native_max_id; ++i) {
-		if (syscalltbl_native[i]) {
-			entries[j].name = syscalltbl_native[i];
-			entries[j].id = i;
-			++j;
-		}
-	}
-
-	qsort(tbl->syscalls.entries, nr_entries, sizeof(struct syscall), syscallcmp);
-	tbl->syscalls.nr_entries = nr_entries;
-	tbl->syscalls.max_id	 = syscalltbl_native_max_id;
-	return 0;
+	return ARRAY_SIZE(syscall_sorted_names);
 }
 
-struct syscalltbl *syscalltbl__new(void)
+int syscalltbl__id_at_idx(int e_machine __maybe_unused, int idx)
 {
-	struct syscalltbl *tbl = malloc(sizeof(*tbl));
-	if (tbl) {
-		if (syscalltbl__init_native(tbl)) {
-			free(tbl);
-			return NULL;
-		}
-	}
-	return tbl;
-}
-
-void syscalltbl__delete(struct syscalltbl *tbl)
-{
-	zfree(&tbl->syscalls.entries);
-	free(tbl);
-}
-
-const char *syscalltbl__name(const struct syscalltbl *tbl __maybe_unused, int id)
-{
-	return id <= syscalltbl_native_max_id ? syscalltbl_native[id]: NULL;
-}
-
-int syscalltbl__id(struct syscalltbl *tbl, const char *name)
-{
-	struct syscall *sc = bsearch(name, tbl->syscalls.entries,
-				     tbl->syscalls.nr_entries, sizeof(*sc),
-				     syscallcmpname);
-
-	return sc ? sc->id : -1;
-}
-
-int syscalltbl__id_at_idx(struct syscalltbl *tbl, int idx)
-{
-	struct syscall *syscalls = tbl->syscalls.entries;
-
-	return idx < tbl->syscalls.nr_entries ? syscalls[idx].id : -1;
+	return syscall_sorted_names[idx];
 }
 
-int syscalltbl__strglobmatch_next(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
+int syscalltbl__strglobmatch_next(int e_machine __maybe_unused, const char *syscall_glob, int *idx)
 {
-	int i;
-	struct syscall *syscalls = tbl->syscalls.entries;
+	for (int i = *idx + 1; i < (int)ARRAY_SIZE(syscall_sorted_names); ++i) {
+		const char *name = syscall_num_to_name[syscall_sorted_names[i]];
 
-	for (i = *idx + 1; i < tbl->syscalls.nr_entries; ++i) {
-		if (strglobmatch(syscalls[i].name, syscall_glob)) {
+		if (strglobmatch(name, syscall_glob)) {
 			*idx = i;
-			return syscalls[i].id;
+			return syscall_sorted_names[i];
 		}
 	}
 
 	return -1;
 }
 
-int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
+int syscalltbl__strglobmatch_first(int e_machine, const char *syscall_glob, int *idx)
 {
 	*idx = -1;
-	return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
+	return syscalltbl__strglobmatch_next(e_machine, syscall_glob, idx);
 }
diff --git a/tools/perf/util/syscalltbl.h b/tools/perf/util/syscalltbl.h
index 362411a6d849..2bb628eff367 100644
--- a/tools/perf/util/syscalltbl.h
+++ b/tools/perf/util/syscalltbl.h
@@ -2,22 +2,12 @@
 #ifndef __PERF_SYSCALLTBL_H
 #define __PERF_SYSCALLTBL_H
 
-struct syscalltbl {
-	struct {
-		int max_id;
-		int nr_entries;
-		void *entries;
-	} syscalls;
-};
+const char *syscalltbl__name(int e_machine, int id);
+int syscalltbl__id(int e_machine, const char *name);
+int syscalltbl__num_idx(int e_machine);
+int syscalltbl__id_at_idx(int e_machine, int idx);
 
-struct syscalltbl *syscalltbl__new(void);
-void syscalltbl__delete(struct syscalltbl *tbl);
-
-const char *syscalltbl__name(const struct syscalltbl *tbl, int id);
-int syscalltbl__id(struct syscalltbl *tbl, const char *name);
-int syscalltbl__id_at_idx(struct syscalltbl *tbl, int idx);
-
-int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx);
-int syscalltbl__strglobmatch_next(struct syscalltbl *tbl, const char *syscall_glob, int *idx);
+int syscalltbl__strglobmatch_first(int e_machine, const char *syscall_glob, int *idx);
+int syscalltbl__strglobmatch_next(int e_machine, const char *syscall_glob, int *idx);
 
 #endif /* __PERF_SYSCALLTBL_H */
-- 
2.49.0.rc0.332.g42c0ae87b1-goog

[PATCH v5 06/11] perf dso: Add support for reading the e_machine type for a dso

[Ian Rogers]

For ELF file dsos read the e_machine from the ELF header. For kernel
types assume the e_machine matches the perf tool. In other cases
return EM_NONE.

When reading from the ELF header use DSO__SWAP that may need
dso->needs_swap initializing. Factor out dso__swap_init to allow this.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/util/dso.c        | 88 ++++++++++++++++++++++++++++++++++++
 tools/perf/util/dso.h        |  3 ++
 tools/perf/util/symbol-elf.c | 27 -----------
 3 files changed, 91 insertions(+), 27 deletions(-)

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 5c6e85fdae0d..00fec1bc32bc 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -1170,6 +1170,67 @@ ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
 	return data_read_write_offset(dso, machine, offset, data, size, true);
 }
 
+uint16_t dso__e_machine(struct dso *dso, struct machine *machine)
+{
+	uint16_t e_machine = EM_NONE;
+	int fd;
+
+	switch (dso__binary_type(dso)) {
+	case DSO_BINARY_TYPE__KALLSYMS:
+	case DSO_BINARY_TYPE__GUEST_KALLSYMS:
+	case DSO_BINARY_TYPE__VMLINUX:
+	case DSO_BINARY_TYPE__GUEST_VMLINUX:
+	case DSO_BINARY_TYPE__GUEST_KMODULE:
+	case DSO_BINARY_TYPE__GUEST_KMODULE_COMP:
+	case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
+	case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP:
+	case DSO_BINARY_TYPE__KCORE:
+	case DSO_BINARY_TYPE__GUEST_KCORE:
+	case DSO_BINARY_TYPE__BPF_PROG_INFO:
+	case DSO_BINARY_TYPE__BPF_IMAGE:
+	case DSO_BINARY_TYPE__OOL:
+	case DSO_BINARY_TYPE__JAVA_JIT:
+		return EM_HOST;
+	case DSO_BINARY_TYPE__DEBUGLINK:
+	case DSO_BINARY_TYPE__BUILD_ID_CACHE:
+	case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO:
+	case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
+	case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
+	case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
+	case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
+	case DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO:
+	case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
+		break;
+	case DSO_BINARY_TYPE__NOT_FOUND:
+	default:
+		return EM_NONE;
+	}
+
+	pthread_mutex_lock(&dso__data_open_lock);
+
+	/*
+	 * dso__data(dso)->fd might be closed if other thread opened another
+	 * file (dso) due to open file limit (RLIMIT_NOFILE).
+	 */
+	try_to_open_dso(dso, machine);
+	fd = dso__data(dso)->fd;
+	if (fd >= 0) {
+		_Static_assert(offsetof(Elf32_Ehdr, e_machine) == 18, "Unexpected offset");
+		_Static_assert(offsetof(Elf64_Ehdr, e_machine) == 18, "Unexpected offset");
+		if (dso__needs_swap(dso) == DSO_SWAP__UNSET) {
+			unsigned char eidata;
+
+			if (pread(fd, &eidata, sizeof(eidata), EI_DATA) == sizeof(eidata))
+				dso__swap_init(dso, eidata);
+		}
+		if (dso__needs_swap(dso) != DSO_SWAP__UNSET &&
+		    pread(fd, &e_machine, sizeof(e_machine), 18) == sizeof(e_machine))
+			e_machine = DSO__SWAP(dso, uint16_t, e_machine);
+	}
+	pthread_mutex_unlock(&dso__data_open_lock);
+	return e_machine;
+}
+
 /**
  * dso__data_read_addr - Read data from dso address
  * @dso: dso object
@@ -1525,6 +1586,33 @@ void dso__put(struct dso *dso)
 		RC_CHK_PUT(dso);
 }
 
+int dso__swap_init(struct dso *dso, unsigned char eidata)
+{
+	static unsigned int const endian = 1;
+
+	dso__set_needs_swap(dso, DSO_SWAP__NO);
+
+	switch (eidata) {
+	case ELFDATA2LSB:
+		/* We are big endian, DSO is little endian. */
+		if (*(unsigned char const *)&endian != 1)
+			dso__set_needs_swap(dso, DSO_SWAP__YES);
+		break;
+
+	case ELFDATA2MSB:
+		/* We are little endian, DSO is big endian. */
+		if (*(unsigned char const *)&endian != 0)
+			dso__set_needs_swap(dso, DSO_SWAP__YES);
+		break;
+
+	default:
+		pr_err("unrecognized DSO data encoding %d\n", eidata);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
 void dso__set_build_id(struct dso *dso, struct build_id *bid)
 {
 	RC_CHK_ACCESS(dso)->bid = *bid;
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index 4aa8c3d36566..38d9e3eac501 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -730,6 +730,8 @@ bool dso__sorted_by_name(const struct dso *dso);
 void dso__set_sorted_by_name(struct dso *dso);
 void dso__sort_by_name(struct dso *dso);
 
+int dso__swap_init(struct dso *dso, unsigned char eidata);
+
 void dso__set_build_id(struct dso *dso, struct build_id *bid);
 bool dso__build_id_equal(const struct dso *dso, struct build_id *bid);
 void dso__read_running_kernel_build_id(struct dso *dso,
@@ -818,6 +820,7 @@ int dso__data_file_size(struct dso *dso, struct machine *machine);
 off_t dso__data_size(struct dso *dso, struct machine *machine);
 ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
 			      u64 offset, u8 *data, ssize_t size);
+uint16_t dso__e_machine(struct dso *dso, struct machine *machine);
 ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
 			    struct machine *machine, u64 addr,
 			    u8 *data, ssize_t size);
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index 66fd1249660a..71df13a5722a 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -1173,33 +1173,6 @@ int filename__read_debuglink(const char *filename, char *debuglink,
 
 #endif
 
-static int dso__swap_init(struct dso *dso, unsigned char eidata)
-{
-	static unsigned int const endian = 1;
-
-	dso__set_needs_swap(dso, DSO_SWAP__NO);
-
-	switch (eidata) {
-	case ELFDATA2LSB:
-		/* We are big endian, DSO is little endian. */
-		if (*(unsigned char const *)&endian != 1)
-			dso__set_needs_swap(dso, DSO_SWAP__YES);
-		break;
-
-	case ELFDATA2MSB:
-		/* We are little endian, DSO is big endian. */
-		if (*(unsigned char const *)&endian != 0)
-			dso__set_needs_swap(dso, DSO_SWAP__YES);
-		break;
-
-	default:
-		pr_err("unrecognized DSO data encoding %d\n", eidata);
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
 bool symsrc__possibly_runtime(struct symsrc *ss)
 {
 	return ss->dynsym || ss->opdsec;
-- 
2.49.0.rc0.332.g42c0ae87b1-goog

[PATCH v5 07/11] perf thread: Add support for reading the e_machine type for a thread

[Ian Rogers]

First try to read the e_machine from the dsos associated with the
thread's maps. If live use the executable from /proc/pid/exe and read
the e_machine from the ELF header. On failure use EM_HOST. Change
builtin-trace syscall functions to pass e_machine from the thread
rather than EM_HOST, so that in later patches when syscalltbl can use
the e_machine the system calls are specific to the architecture.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/builtin-trace.c | 43 ++++++++++----------
 tools/perf/util/thread.c   | 80 ++++++++++++++++++++++++++++++++++++++
 tools/perf/util/thread.h   | 14 ++++++-
 3 files changed, 115 insertions(+), 22 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index cfc8cb8cbef8..49199d753b7c 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2729,16 +2729,16 @@ static int trace__sys_enter(struct trace *trace, struct evsel *evsel,
 	int printed = 0;
 	struct thread *thread;
 	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
-	int augmented_args_size = 0;
+	int augmented_args_size = 0, e_machine;
 	void *augmented_args = NULL;
-	/* TODO: get e_machine from thread. */
-	struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id);
+	struct syscall *sc;
 	struct thread_trace *ttrace;
 
-	if (sc == NULL)
-		return -1;
-
 	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+	e_machine = thread__e_machine(thread, trace->host);
+	sc = trace__syscall_info(trace, evsel, e_machine, id);
+	if (sc == NULL)
+		goto out_put;
 	ttrace = thread__trace(thread, trace);
 	if (ttrace == NULL)
 		goto out_put;
@@ -2806,17 +2806,18 @@ static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel,
 	struct thread_trace *ttrace;
 	struct thread *thread;
 	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1;
-	/* TODO: get e_machine from thread. */
-	struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id);
+	struct syscall *sc;
 	char msg[1024];
 	void *args, *augmented_args = NULL;
-	int augmented_args_size;
+	int augmented_args_size, e_machine;
 	size_t printed = 0;
 
-	if (sc == NULL)
-		return -1;
 
 	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+	e_machine = thread__e_machine(thread, trace->host);
+	sc = trace__syscall_info(trace, evsel, e_machine, id);
+	if (sc == NULL)
+		return -1;
 	ttrace = thread__trace(thread, trace);
 	/*
 	 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args()
@@ -2881,15 +2882,15 @@ static int trace__sys_exit(struct trace *trace, struct evsel *evsel,
 	bool duration_calculated = false;
 	struct thread *thread;
 	int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0;
-	int alignment = trace->args_alignment;
-	/* TODO: get e_machine from thread. */
-	struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id);
+	int alignment = trace->args_alignment, e_machine;
+	struct syscall *sc;
 	struct thread_trace *ttrace;
 
-	if (sc == NULL)
-		return -1;
-
 	thread = machine__findnew_thread(trace->host, sample->pid, sample->tid);
+	e_machine = thread__e_machine(thread, trace->host);
+	sc = trace__syscall_info(trace, evsel, e_machine, id);
+	if (sc == NULL)
+		goto out_put;
 	ttrace = thread__trace(thread, trace);
 	if (ttrace == NULL)
 		goto out_put;
@@ -3236,8 +3237,8 @@ static int trace__event_handler(struct trace *trace, struct evsel *evsel,
 
 	if (evsel == trace->syscalls.events.bpf_output) {
 		int id = perf_evsel__sc_tp_uint(evsel, id, sample);
-		/* TODO: get e_machine from thread. */
-		struct syscall *sc = trace__syscall_info(trace, evsel, EM_HOST, id);
+		int e_machine = thread ? thread__e_machine(thread, trace->host) : EM_HOST;
+		struct syscall *sc = trace__syscall_info(trace, evsel, e_machine, id);
 
 		if (sc) {
 			fprintf(trace->output, "%s(", sc->name);
@@ -4881,6 +4882,7 @@ static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trac
 {
 	size_t printed = 0;
 	struct thread_trace *ttrace = thread__priv(thread);
+	int e_machine = thread__e_machine(thread, trace->host);
 	double ratio;
 
 	if (ttrace == NULL)
@@ -4900,8 +4902,7 @@ static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trac
 	else if (fputc('\n', fp) != EOF)
 		++printed;
 
-	/* TODO: get e_machine from thread. */
-	printed += thread__dump_stats(ttrace, trace, EM_HOST, fp);
+	printed += thread__dump_stats(ttrace, trace, e_machine, fp);
 
 	return printed;
 }
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 0ffdd52d86d7..89585f53c1d5 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
+#include <elf.h>
 #include <errno.h>
+#include <fcntl.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
@@ -16,6 +18,7 @@
 #include "symbol.h"
 #include "unwind.h"
 #include "callchain.h"
+#include "dwarf-regs.h"
 
 #include <api/fs/fs.h>
 
@@ -51,6 +54,7 @@ struct thread *thread__new(pid_t pid, pid_t tid)
 		thread__set_ppid(thread, -1);
 		thread__set_cpu(thread, -1);
 		thread__set_guest_cpu(thread, -1);
+		thread__set_e_machine(thread, EM_NONE);
 		thread__set_lbr_stitch_enable(thread, false);
 		INIT_LIST_HEAD(thread__namespaces_list(thread));
 		INIT_LIST_HEAD(thread__comm_list(thread));
@@ -423,6 +427,82 @@ void thread__find_cpumode_addr_location(struct thread *thread, u64 addr,
 	}
 }
 
+static uint16_t read_proc_e_machine_for_pid(pid_t pid)
+{
+	char path[6 /* "/proc/" */ + 11 /* max length of pid */ + 5 /* "/exe\0" */];
+	int fd;
+	uint16_t e_machine = EM_NONE;
+
+	snprintf(path, sizeof(path), "/proc/%d/exe", pid);
+	fd = open(path, O_RDONLY);
+	if (fd >= 0) {
+		_Static_assert(offsetof(Elf32_Ehdr, e_machine) == 18, "Unexpected offset");
+		_Static_assert(offsetof(Elf64_Ehdr, e_machine) == 18, "Unexpected offset");
+		if (pread(fd, &e_machine, sizeof(e_machine), 18) != sizeof(e_machine))
+			e_machine = EM_NONE;
+		close(fd);
+	}
+	return e_machine;
+}
+
+static int thread__e_machine_callback(struct map *map, void *machine)
+{
+	struct dso *dso = map__dso(map);
+
+	_Static_assert(0 == EM_NONE, "Unexpected EM_NONE");
+	if (!dso)
+		return EM_NONE;
+
+	return dso__e_machine(dso, machine);
+}
+
+uint16_t thread__e_machine(struct thread *thread, struct machine *machine)
+{
+	pid_t tid, pid;
+	uint16_t e_machine = RC_CHK_ACCESS(thread)->e_machine;
+
+	if (e_machine != EM_NONE)
+		return e_machine;
+
+	tid = thread__tid(thread);
+	pid = thread__pid(thread);
+	if (pid != tid) {
+		struct thread *parent = machine__findnew_thread(machine, pid, pid);
+
+		if (parent) {
+			e_machine = thread__e_machine(parent, machine);
+			thread__set_e_machine(thread, e_machine);
+			return e_machine;
+		}
+		/* Something went wrong, fallback. */
+	}
+	/* Reading on the PID thread. First try to find from the maps. */
+	e_machine = maps__for_each_map(thread__maps(thread),
+				       thread__e_machine_callback,
+				       machine);
+	if (e_machine == EM_NONE) {
+		/* Maps failed, perhaps we're live with map events disabled. */
+		bool is_live = machine->machines == NULL;
+
+		if (!is_live) {
+			/* Check if the session has a data file. */
+			struct perf_session *session = container_of(machine->machines,
+								    struct perf_session,
+								    machines);
+
+			is_live = !!session->data;
+		}
+		/* Read from /proc/pid/exe if live. */
+		if (is_live)
+			e_machine = read_proc_e_machine_for_pid(pid);
+	}
+	if (e_machine != EM_NONE)
+		thread__set_e_machine(thread, e_machine);
+	else
+		e_machine = EM_HOST;
+	return e_machine;
+}
+
 struct thread *thread__main_thread(struct machine *machine, struct thread *thread)
 {
 	if (thread__pid(thread) == thread__tid(thread))
diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h
index 6cbf6eb2812e..cd574a896418 100644
--- a/tools/perf/util/thread.h
+++ b/tools/perf/util/thread.h
@@ -60,7 +60,11 @@ DECLARE_RC_STRUCT(thread) {
 	struct srccode_state	srccode_state;
 	bool			filter;
 	int			filter_entry_depth;
-
+	/**
+	 * @e_machine: The ELF EM_* associated with the thread. EM_NONE if not
+	 * computed.
+	 */
+	uint16_t		e_machine;
 	/* LBR call stack stitch */
 	bool			lbr_stitch_enable;
 	struct lbr_stitch	*lbr_stitch;
@@ -302,6 +306,14 @@ static inline void thread__set_filter_entry_depth(struct thread *thread, int dep
 	RC_CHK_ACCESS(thread)->filter_entry_depth = depth;
 }
 
+uint16_t thread__e_machine(struct thread *thread, struct machine *machine);
+
+static inline void thread__set_e_machine(struct thread *thread, uint16_t e_machine)
+{
+	RC_CHK_ACCESS(thread)->e_machine = e_machine;
+}
+
+
 static inline bool thread__lbr_stitch_enable(const struct thread *thread)
 {
 	return RC_CHK_ACCESS(thread)->lbr_stitch_enable;
-- 
2.49.0.rc0.332.g42c0ae87b1-goog

[PATCH v5 08/11] perf trace beauty: Add syscalltbl.sh generating all system call tables

[Ian Rogers]

Rather than generating individual syscall header files generate a
single trace/beauty/generated/syscalltbl.c. In a syscalltbls array
have references to each architectures tables along with the
corresponding e_machine. When the 32-bit or 64-bit table is ambiguous,
match the perf binary's type. For ARM32 don't use the arm64 32-bit
table which is smaller. EM_NONE is present for is no machine matches.

Conditionally compile the tables, only having the appropriate 32 and
64-bit table. If ALL_SYSCALLTBL is defined all tables can be
compiled.

Add comment for noreturn column suggested by Arnd Bergmann:
https://lore.kernel.org/lkml/d47c35dd-9c52-48e7-a00d-135572f11fbb@app.fastmail.com/
and added in commit 9142be9e6443 ("x86/syscall: Mark exit[_group]
syscall handlers __noreturn").

Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Howard Chu <howardchu95@gmail.com>
Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>
---
 tools/perf/Makefile.perf              |   9 +
 tools/perf/trace/beauty/syscalltbl.sh | 274 ++++++++++++++++++++++++++
 2 files changed, 283 insertions(+)
 create mode 100755 tools/perf/trace/beauty/syscalltbl.sh

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index d0b50ccc9d7b..f949ec72f3d2 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -559,6 +559,14 @@ beauty_ioctl_outdir := $(beauty_outdir)/ioctl
 # Create output directory if not already present
 $(shell [ -d '$(beauty_ioctl_outdir)' ] || mkdir -p '$(beauty_ioctl_outdir)')
 
+syscall_array := $(beauty_outdir)/syscalltbl.c
+syscall_tbl := $(srctree)/tools/perf/trace/beauty/syscalltbl.sh
+syscall_tbl_data := $(srctree)/tools/scripts/syscall.tbl \
+	$(wildcard $(srctree)/tools/perf/arch/*/entry/syscalls/syscall*.tbl)
+
+$(syscall_array): $(syscall_tbl) $(syscall_tbl_data)
+	$(Q)$(SHELL) '$(syscall_tbl)' $(srctree)/tools $@
+
 fs_at_flags_array := $(beauty_outdir)/fs_at_flags_array.c
 fs_at_flags_tbl := $(srctree)/tools/perf/trace/beauty/fs_at_flags.sh
 
@@ -878,6 +886,7 @@ build-dir   = $(or $(__build-dir),.)
 
 prepare: $(OUTPUT)PERF-VERSION-FILE $(OUTPUT)common-cmds.h archheaders \
 	arm64-sysreg-defs \
+	$(syscall_array) \
 	$(fs_at_flags_array) \
 	$(clone_flags_array) \
 	$(drm_ioctl_array) \
diff --git a/tools/perf/trace/beauty/syscalltbl.sh b/tools/perf/trace/beauty/syscalltbl.sh
new file mode 100755
index 000000000000..1199618dc178
--- /dev/null
+++ b/tools/perf/trace/beauty/syscalltbl.sh
@@ -0,0 +1,274 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Generate all syscall tables.
+#
+# Each line of the syscall table should have the following format:
+#
+# NR ABI NAME [NATIVE] [COMPAT [noreturn]]
+#
+# NR       syscall number
+# ABI      ABI name
+# NAME     syscall name
+# NATIVE   native entry point (optional)
+# COMPAT   compat entry point (optional)
+# noreturn system call doesn't return (optional)
+set -e
+
+usage() {
+       cat >&2 <<EOF
+usage: $0 <TOOLS DIRECTORY> <OUTFILE>
+
+  <TOOLS DIRECTORY>    path to kernel tools directory
+  <OUTFILE>            output header file
+EOF
+       exit 1
+}
+
+if [ $# -ne 2 ]; then
+       usage
+fi
+tools_dir=$1
+outfile=$2
+
+build_tables() {
+	infile="$1"
+	outfile="$2"
+	abis=$(echo "($3)" | tr ',' '|')
+	e_machine="$4"
+
+	if [ ! -f "$infile" ]
+	then
+		echo "Missing file $infile"
+		exit 1
+	fi
+	sorted_table=$(mktemp /tmp/syscalltbl.XXXXXX)
+	grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | sort -n > "$sorted_table"
+
+	echo "static const char *const syscall_num_to_name_${e_machine}[] = {" >> "$outfile"
+	# the params are: nr abi name entry compat
+	# use _ for intentionally unused variables according to SC2034
+	while read -r nr _ name _ _; do
+		echo "	[$nr] = \"$name\"," >> "$outfile"
+	done < "$sorted_table"
+	echo "};" >> "$outfile"
+
+	echo "static const uint16_t syscall_sorted_names_${e_machine}[] = {" >> "$outfile"
+
+	# When sorting by name, add a suffix of 0s upto 20 characters so that
+	# system calls that differ with a numerical suffix don't sort before
+	# those without. This default behavior of sort differs from that of
+	# strcmp used at runtime. Use sed to strip the trailing 0s suffix
+	# afterwards.
+	grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | awk '{printf $3; for (i = length($3); i < 20; i++) { printf "0"; }; print " " $1}'| sort | sed 's/\([a-zA-Z1-9]\+\)0\+ \([0-9]\+\)/\1 \2/' > "$sorted_table"
+	while read -r name nr; do
+		echo "	$nr,	/* $name */" >> "$outfile"
+	done < "$sorted_table"
+	echo "};" >> "$outfile"
+
+	rm -f "$sorted_table"
+}
+
+rm -f "$outfile"
+cat >> "$outfile" <<EOF
+#include <elf.h>
+#include <stdint.h>
+#include <asm/bitsperlong.h>
+#include <linux/kernel.h>
+
+struct syscalltbl {
+       const char *const *num_to_name;
+       const uint16_t *sorted_names;
+       uint16_t e_machine;
+       uint16_t num_to_name_len;
+       uint16_t sorted_names_len;
+};
+
+#if defined(ALL_SYSCALLTBL) || defined(__alpha__)
+EOF
+build_tables "$tools_dir/perf/arch/alpha/entry/syscalls/syscall.tbl" "$outfile" common,64 EM_ALPHA
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__alpha__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__arm__) || defined(__aarch64__)
+EOF
+build_tables "$tools_dir/perf/arch/arm/entry/syscalls/syscall.tbl" "$outfile" common,32,oabi EM_ARM
+build_tables "$tools_dir/perf/arch/arm64/entry/syscalls/syscall_64.tbl" "$outfile" common,64,renameat,rlimit,memfd_secret EM_AARCH64
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__arm__) || defined(__aarch64__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__csky__)
+EOF
+build_tables "$tools_dir/scripts/syscall.tbl" "$outfile" common,32,csky,time32,stat64,rlimit EM_CSKY
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__csky__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__mips__)
+EOF
+build_tables "$tools_dir/perf/arch/mips/entry/syscalls/syscall_n64.tbl" "$outfile" common,64,n64 EM_MIPS
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__mips__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__hppa__)
+#if __BITS_PER_LONG != 64
+EOF
+build_tables "$tools_dir/perf/arch/parisc/entry/syscalls/syscall.tbl" "$outfile" common,32 EM_PARISC
+echo "#else" >> "$outfile"
+build_tables "$tools_dir/perf/arch/parisc/entry/syscalls/syscall.tbl" "$outfile" common,64 EM_PARISC
+cat >> "$outfile" <<EOF
+#endif //__BITS_PER_LONG != 64
+#endif // defined(ALL_SYSCALLTBL) || defined(__hppa__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__powerpc__) || defined(__powerpc64__)
+EOF
+build_tables "$tools_dir/perf/arch/powerpc/entry/syscalls/syscall.tbl" "$outfile" common,32,nospu EM_PPC
+build_tables "$tools_dir/perf/arch/powerpc/entry/syscalls/syscall.tbl" "$outfile" common,64,nospu EM_PPC64
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__powerpc__) || defined(__powerpc64__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__riscv)
+#if __BITS_PER_LONG != 64
+EOF
+build_tables "$tools_dir/scripts/syscall.tbl" "$outfile" common,32,riscv,memfd_secret EM_RISCV
+echo "#else" >> "$outfile"
+build_tables "$tools_dir/scripts/syscall.tbl" "$outfile" common,64,riscv,rlimit,memfd_secret EM_RISCV
+cat >> "$outfile" <<EOF
+#endif //__BITS_PER_LONG != 64
+#endif // defined(ALL_SYSCALLTBL) || defined(__riscv)
+#if defined(ALL_SYSCALLTBL) || defined(__s390x__)
+EOF
+build_tables "$tools_dir/perf/arch/s390/entry/syscalls/syscall.tbl" "$outfile" common,64,renameat,rlimit,memfd_secret EM_S390
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__s390x__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__sh__)
+EOF
+build_tables "$tools_dir/perf/arch/sh/entry/syscalls/syscall.tbl" "$outfile" common,32 EM_SH
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__sh__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__sparc64__) || defined(__sparc__)
+#if __BITS_PER_LONG != 64
+EOF
+build_tables "$tools_dir/perf/arch/sparc/entry/syscalls/syscall.tbl" "$outfile" common,32 EM_SPARC
+echo "#else" >> "$outfile"
+build_tables "$tools_dir/perf/arch/sparc/entry/syscalls/syscall.tbl" "$outfile" common,64 EM_SPARC
+cat >> "$outfile" <<EOF
+#endif //__BITS_PER_LONG != 64
+#endif // defined(ALL_SYSCALLTBL) || defined(__sparc64__) || defined(__sparc__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__i386__) || defined(__x86_64__)
+EOF
+build_tables "$tools_dir/perf/arch/x86/entry/syscalls/syscall_32.tbl" "$outfile" common,32,i386 EM_386
+build_tables "$tools_dir/perf/arch/x86/entry/syscalls/syscall_64.tbl" "$outfile" common,64 EM_X86_64
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__i386__) || defined(__x86_64__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__xtensa__)
+EOF
+build_tables "$tools_dir/perf/arch/xtensa/entry/syscalls/syscall.tbl" "$outfile" common,32 EM_XTENSA
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__xtensa__)
+
+#if __BITS_PER_LONG != 64
+EOF
+build_tables "$tools_dir/scripts/syscall.tbl" "$outfile" common,32 EM_NONE
+echo "#else" >> "$outfile"
+build_tables "$tools_dir/scripts/syscall.tbl" "$outfile" common,64 EM_NONE
+echo "#endif //__BITS_PER_LONG != 64" >> "$outfile"
+
+build_outer_table() {
+       e_machine=$1
+       outfile="$2"
+       cat >> "$outfile" <<EOF
+       {
+	      .num_to_name = syscall_num_to_name_$e_machine,
+	      .sorted_names = syscall_sorted_names_$e_machine,
+	      .e_machine = $e_machine,
+	      .num_to_name_len = ARRAY_SIZE(syscall_num_to_name_$e_machine),
+	      .sorted_names_len = ARRAY_SIZE(syscall_sorted_names_$e_machine),
+       },
+EOF
+}
+
+cat >> "$outfile" <<EOF
+static const struct syscalltbl syscalltbls[] = {
+#if defined(ALL_SYSCALLTBL) || defined(__alpha__)
+EOF
+build_outer_table EM_ALPHA "$outfile"
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__alpha__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__arm__) || defined(__aarch64__)
+EOF
+build_outer_table EM_ARM "$outfile"
+build_outer_table EM_AARCH64 "$outfile"
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__arm__) || defined(__aarch64__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__csky__)
+EOF
+build_outer_table EM_CSKY "$outfile"
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__csky__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__mips__)
+EOF
+build_outer_table EM_MIPS "$outfile"
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__mips__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__hppa__)
+EOF
+build_outer_table EM_PARISC "$outfile"
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__hppa__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__powerpc__) || defined(__powerpc64__)
+EOF
+build_outer_table EM_PPC "$outfile"
+build_outer_table EM_PPC64 "$outfile"
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__powerpc__) || defined(__powerpc64__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__riscv)
+EOF
+build_outer_table EM_RISCV "$outfile"
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__riscv)
+
+#if defined(ALL_SYSCALLTBL) || defined(__s390x__)
+EOF
+build_outer_table EM_S390 "$outfile"
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__s390x__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__sh__)
+EOF
+build_outer_table EM_SH "$outfile"
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__sh__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__sparc64__) || defined(__sparc__)
+EOF
+build_outer_table EM_SPARC "$outfile"
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__sparc64__) || defined(__sparc__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__i386__) || defined(__x86_64__)
+EOF
+build_outer_table EM_386 "$outfile"
+build_outer_table EM_X86_64 "$outfile"
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__i386__) || defined(__x86_64__)
+
+#if defined(ALL_SYSCALLTBL) || defined(__xtensa__)
+EOF
+build_outer_table EM_XTENSA "$outfile"
+cat >> "$outfile" <<EOF
+#endif // defined(ALL_SYSCALLTBL) || defined(__xtensa__)
+EOF
+build_outer_table EM_NONE "$outfile"
+cat >> "$outfile" <<EOF
+};
+EOF
-- 
2.49.0.rc0.332.g42c0ae87b1-goog

[PATCH v5 09/11] perf syscalltbl: Use lookup table containing multiple architectures

[Ian Rogers]

Switch to use the lookup table containing all architectures rather
than tables matching the perf binary.

This fixes perf trace when executed on a 32-bit i386 binary on an
x86-64 machine. Note in the following the system call names of the
32-bit i386 binary as seen by an x86-64 perf.

Before:
```
         ? (         ): a.out/447296  ... [continued]: munmap())                                           = 0
     0.024 ( 0.001 ms): a.out/447296 recvfrom(ubuf: 0x2, size: 4160585708, flags: DONTROUTE|CTRUNC|TRUNC|DONTWAIT|EOR|WAITALL|FIN|SYN|CONFIRM|RST|ERRQUEUE|NOSIGNAL|WAITFORONE|BATCH|SOCK_DEVMEM|ZEROCOPY|FASTOPEN|CMSG_CLOEXEC|0x91f80000, addr: 0xe30, addr_len: 0xffce438c) = 1475198976
     0.042 ( 0.003 ms): a.out/447296 lgetxattr(name: "", value: 0x3, size: 34)                             = 4160344064
     0.054 ( 0.003 ms): a.out/447296 dup2(oldfd: -134422744, newfd: 4)                                     = -1 ENOENT (No such file or directory)
     0.060 ( 0.009 ms): a.out/447296 preadv(fd: 4294967196, vec: (struct iovec){.iov_base = (void *)0x2e646c2f6374652f,.iov_len = (__kernel_size_t)7307199665335594867,}, vlen: 557056, pos_h: 4160585708) = 3
     0.074 ( 0.004 ms): a.out/447296 lgetxattr(name: "", value: 0x1, size: 2)                              = 4160237568
     0.080 ( 0.001 ms): a.out/447296 lstat(filename: "", statbuf: 0x193f6)                                 = 0
     0.089 ( 0.007 ms): a.out/447296 preadv(fd: 4294967196, vec: (struct iovec){.iov_base = (void *)0x3833692f62696c2f,.iov_len = (__kernel_size_t)3276497845987585334,}, vlen: 557056, pos_h: 4160585708) = 3
     0.097 ( 0.002 ms): a.out/447296 close(fd: 3</proc/447296/status>)                                     = 512
     0.103 ( 0.002 ms): a.out/447296 lgetxattr(name: "", value: 0x1, size: 2050)                           = 4157935616
     0.107 ( 0.007 ms): a.out/447296 lgetxattr(pathname: "", name: "", value: 0x5, size: 2066)             = 4158078976
     0.116 ( 0.003 ms): a.out/447296 lgetxattr(pathname: "", name: "", value: 0x1, size: 2066)             = 4159639552
     0.121 ( 0.003 ms): a.out/447296 lgetxattr(pathname: "", name: "", value: 0x3, size: 2066)             = 4160184320
     0.129 ( 0.002 ms): a.out/447296 lgetxattr(pathname: "", name: "", value: 0x3, size: 50)               = 4160196608
     0.138 ( 0.001 ms): a.out/447296 lstat(filename: "")                                                   = 0
     0.145 ( 0.002 ms): a.out/447296 mq_timedreceive(mqdes: 4291706800, u_msg_ptr: 0xf7f9ea48, msg_len: 134616640, u_msg_prio: 0xf7fd7fec, u_abs_timeout: (struct __kernel_timespec){.tv_sec = (__kernel_time64_t)-578174027777317696,.tv_nsec = (long long int)4160349376,}) = 0
     0.148 ( 0.001 ms): a.out/447296 mkdirat(dfd: -134617816, pathname: " ��� ���▒���▒���", mode: IFREG|ISUID|IRUSR|IWGRP|0xf7fd0000) = 447296
     0.150 ( 0.001 ms): a.out/447296 process_vm_writev(pid: -134617812, lvec: (struct iovec){.iov_base = (void *)0xf7f9e9c8f7f9e4c0,.iov_len = (__kernel_size_t)4160349376,}, liovcnt: 4160588048, rvec: (struct iovec){}, riovcnt: 4160585708, flags: 4291707352) = 0
     0.197 ( 0.004 ms): a.out/447296 capget(header: 4160184320, dataptr: 8192)                             = 0
     0.202 ( 0.002 ms): a.out/447296 capget(header: 1448669184, dataptr: 4096)                             = 0
     0.208 ( 0.002 ms): a.out/447296 capget(header: 4160577536, dataptr: 8192)                             = 0
     0.220 ( 0.001 ms): a.out/447296 getxattr(pathname: "", name: "c������", value: 0xf7f77e34, size: 1)  = 0
     0.228 ( 0.005 ms): a.out/447296 fchmod(fd: -134729728, mode: IRUGO|IWUGO|IFREG|IFIFO|ISVTX|IXUSR|0x10000) = 0
     0.240 ( 0.009 ms): a.out/447296 preadv(fd: 4294967196, vec: 0x5658e008, pos_h: 4160192052)            = 3
     0.250 ( 0.008 ms): a.out/447296 close(fd: 3</proc/447296/status>)                                     = 1436
     0.260 ( 0.018 ms): a.out/447296 stat(filename: "", statbuf: 0xffce32ac)                               = 1436
     0.288 (1000.213 ms): a.out/447296 readlinkat(buf: 0xffce31d4, bufsiz: 4291703244)                       = 0
```

After:
```
         ? (         ): a.out/442930  ... [continued]: execve())                                           = 0
     0.023 ( 0.002 ms): a.out/442930 brk()                                                                 = 0x57760000
     0.052 ( 0.003 ms): a.out/442930 access(filename: 0xf7f5af28, mode: R)                                 = -1 ENOENT (No such file or directory)
     0.059 ( 0.009 ms): a.out/442930 openat(dfd: CWD, filename: "/etc/ld.so.cache", flags: RDONLY|CLOEXEC|LARGEFILE) = 3
     0.078 ( 0.001 ms): a.out/442930 close(fd: 3</proc/442930/status>)                                     = 0
     0.087 ( 0.007 ms): a.out/442930 openat(dfd: CWD, filename: "/lib/i386-linux-", flags: RDONLY|CLOEXEC|LARGEFILE) = 3
     0.095 ( 0.002 ms): a.out/442930 read(fd: 3</proc/442930/status>, buf: 0xffbdbb70, count: 512)         = 512
     0.135 ( 0.001 ms): a.out/442930 close(fd: 3</proc/442930/status>)                                     = 0
     0.148 ( 0.001 ms): a.out/442930 set_tid_address(tidptr: 0xf7f2b528)                                   = 442930 (a.out)
     0.150 ( 0.001 ms): a.out/442930 set_robust_list(head: 0xf7f2b52c, len: 12)                            =
     0.196 ( 0.004 ms): a.out/442930 mprotect(start: 0xf7f03000, len: 8192, prot: READ)                    = 0
     0.202 ( 0.002 ms): a.out/442930 mprotect(start: 0x5658e000, len: 4096, prot: READ)                    = 0
     0.207 ( 0.002 ms): a.out/442930 mprotect(start: 0xf7f63000, len: 8192, prot: READ)                    = 0
     0.230 ( 0.005 ms): a.out/442930 munmap(addr: 0xf7f10000, len: 103414)                                 = 0
     0.244 ( 0.010 ms): a.out/442930 openat(dfd: CWD, filename: 0x5658d008)                                = 3
     0.255 ( 0.007 ms): a.out/442930 read(fd: 3</proc/442930/status>, buf: 0xffbdb67c, count: 4096)        = 1436
     0.264 ( 0.018 ms): a.out/442930 write(fd: 1</dev/pts/4>, buf: , count: 1436)                          = 1436
     0.292 (1000.173 ms): a.out/442930 clock_nanosleep(rqtp: { .tv_sec: 17866546940376776704, .tv_nsec: 4159878336 }, rmtp: 0xffbdb59c) = 0
  1000.478 (         ): a.out/442930 exit_group()                                                          = ?
```

Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Howard Chu <howardchu95@gmail.com>
Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>
---
 tools/perf/util/syscalltbl.c | 89 ++++++++++++++++++++++++++----------
 1 file changed, 64 insertions(+), 25 deletions(-)

diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c
index 760ac4d0869f..db0d2b81aed1 100644
--- a/tools/perf/util/syscalltbl.c
+++ b/tools/perf/util/syscalltbl.c
@@ -15,16 +15,39 @@
 #include <string.h>
 #include "string2.h"
 
-#if __BITS_PER_LONG == 64
-  #include <asm/syscalls_64.h>
-#else
-  #include <asm/syscalls_32.h>
-#endif
+#include "trace/beauty/generated/syscalltbl.c"
 
-const char *syscalltbl__name(int e_machine __maybe_unused, int id)
+static const struct syscalltbl *find_table(int e_machine)
 {
-	if (id >= 0 && id <= (int)ARRAY_SIZE(syscall_num_to_name))
-		return syscall_num_to_name[id];
+	static const struct syscalltbl *last_table;
+	static int last_table_machine = EM_NONE;
+
+	/* Tables only exist for EM_SPARC. */
+	if (e_machine == EM_SPARCV9)
+		e_machine = EM_SPARC;
+
+	if (last_table_machine == e_machine && last_table != NULL)
+		return last_table;
+
+	for (size_t i = 0; i < ARRAY_SIZE(syscalltbls); i++) {
+		const struct syscalltbl *entry = &syscalltbls[i];
+
+		if (entry->e_machine != e_machine && entry->e_machine != EM_NONE)
+			continue;
+
+		last_table = entry;
+		last_table_machine = e_machine;
+		return entry;
+	}
+	return NULL;
+}
+
+const char *syscalltbl__name(int e_machine, int id)
+{
+	const struct syscalltbl *table = find_table(e_machine);
+
+	if (table && id >= 0 && id < table->num_to_name_len)
+		return table->num_to_name[id];
 	return NULL;
 }
 
@@ -41,38 +64,54 @@ static int syscallcmpname(const void *vkey, const void *ventry)
 	return strcmp(key->name, key->tbl[*entry]);
 }
 
-int syscalltbl__id(int e_machine __maybe_unused, const char *name)
+int syscalltbl__id(int e_machine, const char *name)
 {
-	struct syscall_cmp_key key = {
-		.name = name,
-		.tbl = syscall_num_to_name,
-	};
-	const int *id = bsearch(&key, syscall_sorted_names,
-				ARRAY_SIZE(syscall_sorted_names),
-				sizeof(syscall_sorted_names[0]),
-				syscallcmpname);
+	const struct syscalltbl *table = find_table(e_machine);
+	struct syscall_cmp_key key;
+	const int *id;
+
+	if (!table)
+		return -1;
+
+	key.name = name;
+	key.tbl = table->num_to_name;
+	id = bsearch(&key, table->sorted_names, table->sorted_names_len,
+		     sizeof(table->sorted_names[0]), syscallcmpname);
 
 	return id ? *id : -1;
 }
 
-int syscalltbl__num_idx(int e_machine __maybe_unused)
+int syscalltbl__num_idx(int e_machine)
 {
-	return ARRAY_SIZE(syscall_sorted_names);
+	const struct syscalltbl *table = find_table(e_machine);
+
+	if (!table)
+		return 0;
+
+	return table->sorted_names_len;
 }
 
-int syscalltbl__id_at_idx(int e_machine __maybe_unused, int idx)
+int syscalltbl__id_at_idx(int e_machine, int idx)
 {
-	return syscall_sorted_names[idx];
+	const struct syscalltbl *table = find_table(e_machine);
+
+	if (!table)
+		return -1;
+
+	assert(idx >= 0 && idx < table->sorted_names_len);
+	return table->sorted_names[idx];
 }
 
-int syscalltbl__strglobmatch_next(int e_machine __maybe_unused, const char *syscall_glob, int *idx)
+int syscalltbl__strglobmatch_next(int e_machine, const char *syscall_glob, int *idx)
 {
-	for (int i = *idx + 1; i < (int)ARRAY_SIZE(syscall_sorted_names); ++i) {
-		const char *name = syscall_num_to_name[syscall_sorted_names[i]];
+	const struct syscalltbl *table = find_table(e_machine);
+
+	for (int i = *idx + 1; table && i < table->sorted_names_len; ++i) {
+		const char *name = table->num_to_name[table->sorted_names[i]];
 
 		if (strglobmatch(name, syscall_glob)) {
 			*idx = i;
-			return syscall_sorted_names[i];
+			return table->sorted_names[i];
 		}
 	}
 
-- 
2.49.0.rc0.332.g42c0ae87b1-goog

[PATCH v5 10/11] perf build: Remove Makefile.syscalls

[Ian Rogers]

Now a single beauty file is generated and used by all architectures,
remove the per-architecture Makefiles, Kbuild files and previous
generator script.

Note: there was conversation with Charlie Jenkins
<charlie@rivosinc.com> and they'd written an alternate approach to
support multiple architectures:
https://lore.kernel.org/all/20250114-perf_syscall_arch_runtime-v1-1-5b304e408e11@rivosinc.com/
It would have been better to have helped Charlie fix their series (my
apologies) but they agreed that the approach taken here was likely
best for longer term maintainability:
https://lore.kernel.org/lkml/Z6Jk_UN9i69QGqUj@ghost/

Signed-off-by: Ian Rogers <irogers@google.com>
Reviewed-by: Howard Chu <howardchu95@gmail.com>
Reviewed-by: Charlie Jenkins <charlie@rivosinc.com>
---
 tools/perf/Makefile.perf                      |  1 -
 tools/perf/arch/alpha/entry/syscalls/Kbuild   |  2 -
 .../alpha/entry/syscalls/Makefile.syscalls    |  5 --
 tools/perf/arch/arc/entry/syscalls/Kbuild     |  2 -
 .../arch/arc/entry/syscalls/Makefile.syscalls |  3 -
 tools/perf/arch/arm/entry/syscalls/Kbuild     |  4 -
 .../arch/arm/entry/syscalls/Makefile.syscalls |  2 -
 tools/perf/arch/arm64/entry/syscalls/Kbuild   |  3 -
 .../arm64/entry/syscalls/Makefile.syscalls    |  6 --
 tools/perf/arch/csky/entry/syscalls/Kbuild    |  2 -
 .../csky/entry/syscalls/Makefile.syscalls     |  3 -
 .../perf/arch/loongarch/entry/syscalls/Kbuild |  2 -
 .../entry/syscalls/Makefile.syscalls          |  3 -
 tools/perf/arch/mips/entry/syscalls/Kbuild    |  2 -
 .../mips/entry/syscalls/Makefile.syscalls     |  5 --
 tools/perf/arch/parisc/entry/syscalls/Kbuild  |  3 -
 .../parisc/entry/syscalls/Makefile.syscalls   |  6 --
 tools/perf/arch/powerpc/entry/syscalls/Kbuild |  3 -
 .../powerpc/entry/syscalls/Makefile.syscalls  |  6 --
 tools/perf/arch/riscv/entry/syscalls/Kbuild   |  2 -
 .../riscv/entry/syscalls/Makefile.syscalls    |  4 -
 tools/perf/arch/s390/entry/syscalls/Kbuild    |  2 -
 .../s390/entry/syscalls/Makefile.syscalls     |  5 --
 tools/perf/arch/sh/entry/syscalls/Kbuild      |  2 -
 .../arch/sh/entry/syscalls/Makefile.syscalls  |  4 -
 tools/perf/arch/sparc/entry/syscalls/Kbuild   |  3 -
 .../sparc/entry/syscalls/Makefile.syscalls    |  5 --
 tools/perf/arch/x86/entry/syscalls/Kbuild     |  3 -
 .../arch/x86/entry/syscalls/Makefile.syscalls |  6 --
 tools/perf/arch/xtensa/entry/syscalls/Kbuild  |  2 -
 .../xtensa/entry/syscalls/Makefile.syscalls   |  4 -
 tools/perf/scripts/Makefile.syscalls          | 61 ---------------
 tools/perf/scripts/syscalltbl.sh              | 76 -------------------
 33 files changed, 242 deletions(-)
 delete mode 100644 tools/perf/arch/alpha/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/alpha/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/arc/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/arc/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/arm/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/arm/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/arm64/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/arm64/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/csky/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/csky/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/loongarch/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/loongarch/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/mips/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/mips/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/parisc/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/parisc/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/powerpc/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/powerpc/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/riscv/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/riscv/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/s390/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/s390/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/sh/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/sh/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/sparc/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/sparc/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/x86/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/x86/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/arch/xtensa/entry/syscalls/Kbuild
 delete mode 100644 tools/perf/arch/xtensa/entry/syscalls/Makefile.syscalls
 delete mode 100644 tools/perf/scripts/Makefile.syscalls
 delete mode 100755 tools/perf/scripts/syscalltbl.sh

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index f949ec72f3d2..f3cd8de15d1a 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -339,7 +339,6 @@ ifeq ($(filter feature-dump,$(MAKECMDGOALS)),feature-dump)
 FEATURE_TESTS := all
 endif
 endif
-include $(srctree)/tools/perf/scripts/Makefile.syscalls
 include Makefile.config
 endif
 
diff --git a/tools/perf/arch/alpha/entry/syscalls/Kbuild b/tools/perf/arch/alpha/entry/syscalls/Kbuild
deleted file mode 100644
index 9a41e3572c3a..000000000000
--- a/tools/perf/arch/alpha/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_64.h
diff --git a/tools/perf/arch/alpha/entry/syscalls/Makefile.syscalls b/tools/perf/arch/alpha/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index 690168aac34d..000000000000
--- a/tools/perf/arch/alpha/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,5 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_64  +=
-
-syscalltbl = $(srctree)/tools/perf/arch/alpha/entry/syscalls/syscall.tbl
diff --git a/tools/perf/arch/arc/entry/syscalls/Kbuild b/tools/perf/arch/arc/entry/syscalls/Kbuild
deleted file mode 100644
index 11707c481a24..000000000000
--- a/tools/perf/arch/arc/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_32.h
diff --git a/tools/perf/arch/arc/entry/syscalls/Makefile.syscalls b/tools/perf/arch/arc/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index 391d30ab7a83..000000000000
--- a/tools/perf/arch/arc/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,3 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_32 += arc time32 renameat stat64 rlimit
diff --git a/tools/perf/arch/arm/entry/syscalls/Kbuild b/tools/perf/arch/arm/entry/syscalls/Kbuild
deleted file mode 100644
index 9d777540f089..000000000000
--- a/tools/perf/arch/arm/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,4 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_32 += oabi
-syscalltbl = $(srctree)/tools/perf/arch/arm/entry/syscalls/syscall.tbl
diff --git a/tools/perf/arch/arm/entry/syscalls/Makefile.syscalls b/tools/perf/arch/arm/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index 11707c481a24..000000000000
--- a/tools/perf/arch/arm/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_32.h
diff --git a/tools/perf/arch/arm64/entry/syscalls/Kbuild b/tools/perf/arch/arm64/entry/syscalls/Kbuild
deleted file mode 100644
index 84c6599b4ea6..000000000000
--- a/tools/perf/arch/arm64/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,3 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_32.h
-syscall-y += syscalls_64.h
diff --git a/tools/perf/arch/arm64/entry/syscalls/Makefile.syscalls b/tools/perf/arch/arm64/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index e7e78c2d1c02..000000000000
--- a/tools/perf/arch/arm64/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,6 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_32 +=
-syscall_abis_64 += renameat rlimit memfd_secret
-
-syscalltbl = $(srctree)/tools/perf/arch/arm64/entry/syscalls/syscall_%.tbl
diff --git a/tools/perf/arch/csky/entry/syscalls/Kbuild b/tools/perf/arch/csky/entry/syscalls/Kbuild
deleted file mode 100644
index 11707c481a24..000000000000
--- a/tools/perf/arch/csky/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_32.h
diff --git a/tools/perf/arch/csky/entry/syscalls/Makefile.syscalls b/tools/perf/arch/csky/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index ea2dd10d0571..000000000000
--- a/tools/perf/arch/csky/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,3 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_32 += csky time32 stat64 rlimit
diff --git a/tools/perf/arch/loongarch/entry/syscalls/Kbuild b/tools/perf/arch/loongarch/entry/syscalls/Kbuild
deleted file mode 100644
index 9a41e3572c3a..000000000000
--- a/tools/perf/arch/loongarch/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_64.h
diff --git a/tools/perf/arch/loongarch/entry/syscalls/Makefile.syscalls b/tools/perf/arch/loongarch/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index 47d32da2aed8..000000000000
--- a/tools/perf/arch/loongarch/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,3 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_64 +=
diff --git a/tools/perf/arch/mips/entry/syscalls/Kbuild b/tools/perf/arch/mips/entry/syscalls/Kbuild
deleted file mode 100644
index 9a41e3572c3a..000000000000
--- a/tools/perf/arch/mips/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_64.h
diff --git a/tools/perf/arch/mips/entry/syscalls/Makefile.syscalls b/tools/perf/arch/mips/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index 9ee914bdfb05..000000000000
--- a/tools/perf/arch/mips/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,5 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_64 += n64
-
-syscalltbl = $(srctree)/tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl
diff --git a/tools/perf/arch/parisc/entry/syscalls/Kbuild b/tools/perf/arch/parisc/entry/syscalls/Kbuild
deleted file mode 100644
index 84c6599b4ea6..000000000000
--- a/tools/perf/arch/parisc/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,3 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_32.h
-syscall-y += syscalls_64.h
diff --git a/tools/perf/arch/parisc/entry/syscalls/Makefile.syscalls b/tools/perf/arch/parisc/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index ae326fecb83b..000000000000
--- a/tools/perf/arch/parisc/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,6 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_32  +=
-syscall_abis_64  +=
-
-syscalltbl = $(srctree)/tools/perf/arch/parisc/entry/syscalls/syscall.tbl
diff --git a/tools/perf/arch/powerpc/entry/syscalls/Kbuild b/tools/perf/arch/powerpc/entry/syscalls/Kbuild
deleted file mode 100644
index 84c6599b4ea6..000000000000
--- a/tools/perf/arch/powerpc/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,3 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_32.h
-syscall-y += syscalls_64.h
diff --git a/tools/perf/arch/powerpc/entry/syscalls/Makefile.syscalls b/tools/perf/arch/powerpc/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index e35afbc57c79..000000000000
--- a/tools/perf/arch/powerpc/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,6 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_32 += nospu
-syscall_abis_64 += nospu
-
-syscalltbl = $(srctree)/tools/perf/arch/powerpc/entry/syscalls/syscall.tbl
diff --git a/tools/perf/arch/riscv/entry/syscalls/Kbuild b/tools/perf/arch/riscv/entry/syscalls/Kbuild
deleted file mode 100644
index 9a41e3572c3a..000000000000
--- a/tools/perf/arch/riscv/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_64.h
diff --git a/tools/perf/arch/riscv/entry/syscalls/Makefile.syscalls b/tools/perf/arch/riscv/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index 9668fd1faf60..000000000000
--- a/tools/perf/arch/riscv/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,4 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_32 += riscv memfd_secret
-syscall_abis_64 += riscv rlimit memfd_secret
diff --git a/tools/perf/arch/s390/entry/syscalls/Kbuild b/tools/perf/arch/s390/entry/syscalls/Kbuild
deleted file mode 100644
index 9a41e3572c3a..000000000000
--- a/tools/perf/arch/s390/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_64.h
diff --git a/tools/perf/arch/s390/entry/syscalls/Makefile.syscalls b/tools/perf/arch/s390/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index 9762d7abf17c..000000000000
--- a/tools/perf/arch/s390/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,5 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_64 += renameat rlimit memfd_secret
-
-syscalltbl = $(srctree)/tools/perf/arch/s390/entry/syscalls/syscall.tbl
diff --git a/tools/perf/arch/sh/entry/syscalls/Kbuild b/tools/perf/arch/sh/entry/syscalls/Kbuild
deleted file mode 100644
index 11707c481a24..000000000000
--- a/tools/perf/arch/sh/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_32.h
diff --git a/tools/perf/arch/sh/entry/syscalls/Makefile.syscalls b/tools/perf/arch/sh/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index 25080390e4ed..000000000000
--- a/tools/perf/arch/sh/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,4 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_32 +=
-syscalltbl = $(srctree)/tools/perf/arch/sh/entry/syscalls/syscall.tbl
diff --git a/tools/perf/arch/sparc/entry/syscalls/Kbuild b/tools/perf/arch/sparc/entry/syscalls/Kbuild
deleted file mode 100644
index 84c6599b4ea6..000000000000
--- a/tools/perf/arch/sparc/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,3 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_32.h
-syscall-y += syscalls_64.h
diff --git a/tools/perf/arch/sparc/entry/syscalls/Makefile.syscalls b/tools/perf/arch/sparc/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index 212c1800b644..000000000000
--- a/tools/perf/arch/sparc/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,5 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_32  +=
-syscall_abis_64  +=
-syscalltbl = $(srctree)/tools/perf/arch/sparc/entry/syscalls/syscall.tbl
diff --git a/tools/perf/arch/x86/entry/syscalls/Kbuild b/tools/perf/arch/x86/entry/syscalls/Kbuild
deleted file mode 100644
index 84c6599b4ea6..000000000000
--- a/tools/perf/arch/x86/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,3 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_32.h
-syscall-y += syscalls_64.h
diff --git a/tools/perf/arch/x86/entry/syscalls/Makefile.syscalls b/tools/perf/arch/x86/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index db3d5d6d4e56..000000000000
--- a/tools/perf/arch/x86/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,6 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_32 += i386
-syscall_abis_64 +=
-
-syscalltbl = $(srctree)/tools/perf/arch/x86/entry/syscalls/syscall_%.tbl
diff --git a/tools/perf/arch/xtensa/entry/syscalls/Kbuild b/tools/perf/arch/xtensa/entry/syscalls/Kbuild
deleted file mode 100644
index 11707c481a24..000000000000
--- a/tools/perf/arch/xtensa/entry/syscalls/Kbuild
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-syscall-y += syscalls_32.h
diff --git a/tools/perf/arch/xtensa/entry/syscalls/Makefile.syscalls b/tools/perf/arch/xtensa/entry/syscalls/Makefile.syscalls
deleted file mode 100644
index d4aa2358460c..000000000000
--- a/tools/perf/arch/xtensa/entry/syscalls/Makefile.syscalls
+++ /dev/null
@@ -1,4 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-syscall_abis_32  +=
-syscalltbl = $(srctree)/tools/perf/arch/xtensa/entry/syscalls/syscall.tbl
diff --git a/tools/perf/scripts/Makefile.syscalls b/tools/perf/scripts/Makefile.syscalls
deleted file mode 100644
index 8bf55333262e..000000000000
--- a/tools/perf/scripts/Makefile.syscalls
+++ /dev/null
@@ -1,61 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-# This Makefile generates headers in
-# tools/perf/arch/$(SRCARCH)/include/generated/asm from the architecture's
-# syscall table. This will either be from the generic syscall table, or from a
-# table that is specific to that architecture.
-
-PHONY := all
-all:
-
-obj := $(OUTPUT)arch/$(SRCARCH)/include/generated/asm
-
-syscall_abis_32  := common,32
-syscall_abis_64  := common,64
-syscalltbl := $(srctree)/tools/scripts/syscall.tbl
-
-# let architectures override $(syscall_abis_%) and $(syscalltbl)
--include $(srctree)/tools/perf/arch/$(SRCARCH)/entry/syscalls/Makefile.syscalls
-include $(srctree)/tools/build/Build.include
--include $(srctree)/tools/perf/arch/$(SRCARCH)/entry/syscalls/Kbuild
-
-systbl := $(srctree)/tools/perf/scripts/syscalltbl.sh
-
-syscall-y   := $(addprefix $(obj)/, $(syscall-y))
-
-# Remove stale wrappers when the corresponding files are removed from generic-y
-old-headers := $(wildcard $(obj)/*.h)
-unwanted    := $(filter-out $(syscall-y),$(old-headers))
-
-quiet_cmd_remove = REMOVE  $(unwanted)
-      cmd_remove = rm -f $(unwanted)
-
-quiet_cmd_systbl = SYSTBL  $@
-      cmd_systbl = $(CONFIG_SHELL) $(systbl) \
-		   $(if $(systbl-args-$*),$(systbl-args-$*),$(systbl-args)) \
-		   --abis $(subst $(space),$(comma),$(strip $(syscall_abis_$*))) \
-		   $< $@
-
-all: $(syscall-y)
-	$(if $(unwanted),$(call cmd,remove))
-	@:
-
-$(obj)/syscalls_%.h: $(syscalltbl) $(systbl) FORCE
-	$(call if_changed,systbl)
-
-targets := $(syscall-y)
-
-# Create output directory. Skip it if at least one old header exists
-# since we know the output directory already exists.
-ifeq ($(old-headers),)
-$(shell mkdir -p $(obj))
-endif
-
-PHONY += FORCE
-
-FORCE:
-
-existing-targets := $(wildcard $(sort $(targets)))
-
--include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd)
-
-.PHONY: $(PHONY)
diff --git a/tools/perf/scripts/syscalltbl.sh b/tools/perf/scripts/syscalltbl.sh
deleted file mode 100755
index a39b3013b103..000000000000
--- a/tools/perf/scripts/syscalltbl.sh
+++ /dev/null
@@ -1,76 +0,0 @@
-#!/bin/sh
-# SPDX-License-Identifier: GPL-2.0
-#
-# Generate a syscall table header.
-#
-# Each line of the syscall table should have the following format:
-#
-# NR ABI NAME [NATIVE] [COMPAT]
-#
-# NR       syscall number
-# ABI      ABI name
-# NAME     syscall name
-# NATIVE   native entry point (optional)
-# COMPAT   compat entry point (optional)
-
-set -e
-
-usage() {
-	echo >&2 "usage: $0 [--abis ABIS] INFILE OUTFILE" >&2
-	echo >&2
-	echo >&2 "  INFILE    input syscall table"
-	echo >&2 "  OUTFILE   output header file"
-	echo >&2
-	echo >&2 "options:"
-	echo >&2 "  --abis ABIS        ABI(s) to handle (By default, all lines are handled)"
-	exit 1
-}
-
-# default unless specified by options
-abis=
-
-while [ $# -gt 0 ]
-do
-	case $1 in
-	--abis)
-		abis=$(echo "($2)" | tr ',' '|')
-		shift 2;;
-	-*)
-		echo "$1: unknown option" >&2
-		usage;;
-	*)
-		break;;
-	esac
-done
-
-if [ $# -ne 2 ]; then
-	usage
-fi
-
-infile="$1"
-outfile="$2"
-
-sorted_table=$(mktemp /tmp/syscalltbl.XXXXXX)
-grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | sort -n > $sorted_table
-
-echo "static const char *const syscall_num_to_name[] = {" > $outfile
-# the params are: nr abi name entry compat
-# use _ for intentionally unused variables according to SC2034
-while read nr _ name _ _; do
-	echo "	[$nr] = \"$name\"," >> $outfile
-done < $sorted_table
-echo "};" >> $outfile
-
-echo "static const uint16_t syscall_sorted_names[] = {" >> $outfile
-
-# When sorting by name, add a suffix of 0s upto 20 characters so that system
-# calls that differ with a numerical suffix don't sort before those
-# without. This default behavior of sort differs from that of strcmp used at
-# runtime. Use sed to strip the trailing 0s suffix afterwards.
-grep -E "^[0-9]+[[:space:]]+$abis" "$infile" | awk '{printf $3; for (i = length($3); i < 20; i++) { printf "0"; }; print " " $1}'| sort | sed 's/\([a-zA-Z1-9]\+\)0\+ \([0-9]\+\)/\1 \2/' > $sorted_table
-while read name nr; do
-	echo "	$nr,	/* $name */" >> $outfile
-done < $sorted_table
-echo "};" >> $outfile
-
-rm -f $sorted_table
-- 
2.49.0.rc0.332.g42c0ae87b1-goog

[PATCH v5 11/11] perf syscalltbl: Mask off ABI type for MIPS system calls

[Ian Rogers]

Arnd Bergmann described that MIPS system calls don't necessarily start
from 0 as an ABI prefix is applied:
https://lore.kernel.org/lkml/8ed7dfb2-1e4d-4aa4-a04b-0397a89365d1@app.fastmail.com/
When decoding the "id" (aka system call number) for MIPS ignore values
greater-than 1000.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/util/syscalltbl.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c
index db0d2b81aed1..ace66e69c1bc 100644
--- a/tools/perf/util/syscalltbl.c
+++ b/tools/perf/util/syscalltbl.c
@@ -46,6 +46,14 @@ const char *syscalltbl__name(int e_machine, int id)
 {
 	const struct syscalltbl *table = find_table(e_machine);
 
+	if (e_machine == EM_MIPS && id > 1000) {
+		/*
+		 * MIPS may encode the N32/64/O32 type in the high part of
+		 * syscall number. Mask this off if present. See the values of
+		 * __NR_N32_Linux, __NR_64_Linux, __NR_O32_Linux and __NR_Linux.
+		 */
+		id = id % 1000;
+	}
 	if (table && id >= 0 && id < table->num_to_name_len)
 		return table->num_to_name[id];
 	return NULL;
-- 
2.49.0.rc0.332.g42c0ae87b1-goog

Re: [PATCH v5 06/11] perf dso: Add support for reading the e_machine type for a dso

[Arnaldo Carvalho de Melo]

On Fri, Mar 07, 2025 at 04:32:04PM -0800, Ian Rogers wrote:
> For ELF file dsos read the e_machine from the ELF header. For kernel
> types assume the e_machine matches the perf tool. In other cases
> return EM_NONE.
> 
> When reading from the ELF header use DSO__SWAP that may need
> dso->needs_swap initializing. Factor out dso__swap_init to allow this.
> 
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
>  tools/perf/util/dso.c        | 88 ++++++++++++++++++++++++++++++++++++
>  tools/perf/util/dso.h        |  3 ++
>  tools/perf/util/symbol-elf.c | 27 -----------
>  3 files changed, 91 insertions(+), 27 deletions(-)

This one, due to this having already been merged:

commit b10f74308e1305275e69ddde711ec817cc69e306 (perf-tools-next/perf-tools-next)
Author: Stephen Brennan <stephen.s.brennan@oracle.com>
Date:   Fri Mar 7 15:22:03 2025 -0800

    perf symbol: Support .gnu_debugdata for symbols

Needs this so that we read the e_machine from the ELF file:

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 8188ba4d432cd5ac..8d2d8bb22e077bea 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -1203,6 +1203,7 @@ uint16_t dso__e_machine(struct dso *dso, struct machine *machine)
 	case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
 	case DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO:
 	case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
+	case DSO_BINARY_TYPE__GNU_DEBUGDATA:
 		break;
 	case DSO_BINARY_TYPE__NOT_FOUND:
 	default:
 
---

Continuing the review and test.

- Arnaldo

> diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
> index 5c6e85fdae0d..00fec1bc32bc 100644
> --- a/tools/perf/util/dso.c
> +++ b/tools/perf/util/dso.c
> @@ -1170,6 +1170,67 @@ ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
>  	return data_read_write_offset(dso, machine, offset, data, size, true);
>  }
>  
> +uint16_t dso__e_machine(struct dso *dso, struct machine *machine)
> +{
> +	uint16_t e_machine = EM_NONE;
> +	int fd;
> +
> +	switch (dso__binary_type(dso)) {
> +	case DSO_BINARY_TYPE__KALLSYMS:
> +	case DSO_BINARY_TYPE__GUEST_KALLSYMS:
> +	case DSO_BINARY_TYPE__VMLINUX:
> +	case DSO_BINARY_TYPE__GUEST_VMLINUX:
> +	case DSO_BINARY_TYPE__GUEST_KMODULE:
> +	case DSO_BINARY_TYPE__GUEST_KMODULE_COMP:
> +	case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
> +	case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP:
> +	case DSO_BINARY_TYPE__KCORE:
> +	case DSO_BINARY_TYPE__GUEST_KCORE:
> +	case DSO_BINARY_TYPE__BPF_PROG_INFO:
> +	case DSO_BINARY_TYPE__BPF_IMAGE:
> +	case DSO_BINARY_TYPE__OOL:
> +	case DSO_BINARY_TYPE__JAVA_JIT:
> +		return EM_HOST;
> +	case DSO_BINARY_TYPE__DEBUGLINK:
> +	case DSO_BINARY_TYPE__BUILD_ID_CACHE:
> +	case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO:
> +	case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
> +	case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
> +	case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
> +	case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
> +	case DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO:
> +	case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
> +		break;
> +	case DSO_BINARY_TYPE__NOT_FOUND:
> +	default:
> +		return EM_NONE;
> +	}
> +
> +	pthread_mutex_lock(&dso__data_open_lock);
> +
> +	/*
> +	 * dso__data(dso)->fd might be closed if other thread opened another
> +	 * file (dso) due to open file limit (RLIMIT_NOFILE).
> +	 */
> +	try_to_open_dso(dso, machine);
> +	fd = dso__data(dso)->fd;
> +	if (fd >= 0) {
> +		_Static_assert(offsetof(Elf32_Ehdr, e_machine) == 18, "Unexpected offset");
> +		_Static_assert(offsetof(Elf64_Ehdr, e_machine) == 18, "Unexpected offset");
> +		if (dso__needs_swap(dso) == DSO_SWAP__UNSET) {
> +			unsigned char eidata;
> +
> +			if (pread(fd, &eidata, sizeof(eidata), EI_DATA) == sizeof(eidata))
> +				dso__swap_init(dso, eidata);
> +		}
> +		if (dso__needs_swap(dso) != DSO_SWAP__UNSET &&
> +		    pread(fd, &e_machine, sizeof(e_machine), 18) == sizeof(e_machine))
> +			e_machine = DSO__SWAP(dso, uint16_t, e_machine);
> +	}
> +	pthread_mutex_unlock(&dso__data_open_lock);
> +	return e_machine;
> +}
> +
>  /**
>   * dso__data_read_addr - Read data from dso address
>   * @dso: dso object
> @@ -1525,6 +1586,33 @@ void dso__put(struct dso *dso)
>  		RC_CHK_PUT(dso);
>  }
>  
> +int dso__swap_init(struct dso *dso, unsigned char eidata)
> +{
> +	static unsigned int const endian = 1;
> +
> +	dso__set_needs_swap(dso, DSO_SWAP__NO);
> +
> +	switch (eidata) {
> +	case ELFDATA2LSB:
> +		/* We are big endian, DSO is little endian. */
> +		if (*(unsigned char const *)&endian != 1)
> +			dso__set_needs_swap(dso, DSO_SWAP__YES);
> +		break;
> +
> +	case ELFDATA2MSB:
> +		/* We are little endian, DSO is big endian. */
> +		if (*(unsigned char const *)&endian != 0)
> +			dso__set_needs_swap(dso, DSO_SWAP__YES);
> +		break;
> +
> +	default:
> +		pr_err("unrecognized DSO data encoding %d\n", eidata);
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
>  void dso__set_build_id(struct dso *dso, struct build_id *bid)
>  {
>  	RC_CHK_ACCESS(dso)->bid = *bid;
> diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
> index 4aa8c3d36566..38d9e3eac501 100644
> --- a/tools/perf/util/dso.h
> +++ b/tools/perf/util/dso.h
> @@ -730,6 +730,8 @@ bool dso__sorted_by_name(const struct dso *dso);
>  void dso__set_sorted_by_name(struct dso *dso);
>  void dso__sort_by_name(struct dso *dso);
>  
> +int dso__swap_init(struct dso *dso, unsigned char eidata);
> +
>  void dso__set_build_id(struct dso *dso, struct build_id *bid);
>  bool dso__build_id_equal(const struct dso *dso, struct build_id *bid);
>  void dso__read_running_kernel_build_id(struct dso *dso,
> @@ -818,6 +820,7 @@ int dso__data_file_size(struct dso *dso, struct machine *machine);
>  off_t dso__data_size(struct dso *dso, struct machine *machine);
>  ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
>  			      u64 offset, u8 *data, ssize_t size);
> +uint16_t dso__e_machine(struct dso *dso, struct machine *machine);
>  ssize_t dso__data_read_addr(struct dso *dso, struct map *map,
>  			    struct machine *machine, u64 addr,
>  			    u8 *data, ssize_t size);
> diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
> index 66fd1249660a..71df13a5722a 100644
> --- a/tools/perf/util/symbol-elf.c
> +++ b/tools/perf/util/symbol-elf.c
> @@ -1173,33 +1173,6 @@ int filename__read_debuglink(const char *filename, char *debuglink,
>  
>  #endif
>  
> -static int dso__swap_init(struct dso *dso, unsigned char eidata)
> -{
> -	static unsigned int const endian = 1;
> -
> -	dso__set_needs_swap(dso, DSO_SWAP__NO);
> -
> -	switch (eidata) {
> -	case ELFDATA2LSB:
> -		/* We are big endian, DSO is little endian. */
> -		if (*(unsigned char const *)&endian != 1)
> -			dso__set_needs_swap(dso, DSO_SWAP__YES);
> -		break;
> -
> -	case ELFDATA2MSB:
> -		/* We are little endian, DSO is big endian. */
> -		if (*(unsigned char const *)&endian != 0)
> -			dso__set_needs_swap(dso, DSO_SWAP__YES);
> -		break;
> -
> -	default:
> -		pr_err("unrecognized DSO data encoding %d\n", eidata);
> -		return -EINVAL;
> -	}
> -
> -	return 0;
> -}
> -
>  bool symsrc__possibly_runtime(struct symsrc *ss)
>  {
>  	return ss->dynsym || ss->opdsec;
> -- 
> 2.49.0.rc0.332.g42c0ae87b1-goog
> 

Re: [PATCH v5 00/11] perf: Support multiple system call tables in the build

[Namhyung Kim]

On Fri, Mar 07, 2025 at 04:31:58PM -0800, Ian Rogers wrote:
> This work builds on the clean up of system call tables and removal of
> libaudit by Charlie Jenkins <charlie@rivosinc.com>.
> 
> The system call table in perf trace is used to map system call numbers
> to names and vice versa. Prior to these changes, a single table
> matching the perf binary's build was present. The table would be
> incorrect if tracing say a 32-bit binary from a 64-bit version of
> perf, the names and numbers wouldn't match.
> 
> Change the build so that a single system call file is built and the
> potentially multiple tables are identifiable from the ELF machine type
> of the process being examined. To determine the ELF machine type, the
> executable's maps are searched and the associated DSOs ELF headers are
> read. When this fails and when live, /proc/pid/exe's ELF header is
> read. Fallback to using the perf's binary type when unknown.

Now it works well for me!

  $ sudo ./perf trace a32.out
           ? (         ): a32.out/1267727  ... [continued]: execve())                                           = 0
           ? (         ): a32.out/1267727  ... [continued]: brk())                                              = 0x57f33000
       0.062 ( 0.003 ms): a32.out/1267727 access(filename: 0xf7f170cc, mode: R)                                 = -1 ENOENT (No such file or directory)
       0.070 ( 0.011 ms): a32.out/1267727 openat(dfd: CWD, filename: 0xf7f1347f, flags: RDONLY|CLOEXEC|LARGEFILE) = 3
       0.070 ( 0.023 ms): a32.out/1267727  ... [continued]: close())                                            = 0
       0.103 ( 0.009 ms): a32.out/1267727 openat(dfd: CWD, filename: 0xf7ee43e0, flags: RDONLY|CLOEXEC|LARGEFILE) = 3
       0.113 ( 0.002 ms): a32.out/1267727 read(fd: 3, buf: 0xff854990, count: 512)                              = 512
       0.113 ( 0.049 ms): a32.out/1267727  ... [continued]: close())                                            = 0
       0.113 ( 0.060 ms): a32.out/1267727  ... [continued]: set_tid_address())                                  = 1267727 (a32.out)
       0.175 ( 0.001 ms): a32.out/1267727 set_robust_list(head: 0xf7ee556c, len: 12)                            = 
       0.222 ( 0.005 ms): a32.out/1267727 mprotect(start: 0xf7ebc000, len: 8192, prot: READ)                    = 0
       0.230 ( 0.004 ms): a32.out/1267727 mprotect(start: 0x565b1000, len: 4096, prot: READ)                    = 0
       0.237 ( 0.003 ms): a32.out/1267727 mprotect(start: 0xf7f1f000, len: 8192, prot: READ)                    = 0
       0.258 ( 0.006 ms): a32.out/1267727 munmap(addr: 0xf7ec9000, len: 108298)                                 = 0
       0.258 ( 0.027 ms): a32.out/1267727  ... [continued]: brk())                                              = 0x57f33000
       0.258 ( 0.031 ms): a32.out/1267727  ... [continued]: brk())                                              = 0x57f54000
       0.258 ( 0.033 ms): a32.out/1267727  ... [continued]: brk())                                              = 0x57f55000
       0.296 ( 0.008 ms): a32.out/1267727 openat(dfd: CWD, filename: 0x565b000a)                                = 3
       0.316 ( 0.002 ms): a32.out/1267727 read(fd: 3, buf: 0xff8544a8, count: 4096)                             = 211
       0.319 ( 0.001 ms): a32.out/1267727 read(fd: 3, buf: 0x57f332e0, count: 4096)                             = 0
       0.319 ( 0.005 ms): a32.out/1267727  ... [continued]: close())                                            = 0
       0.319 ( 0.010 ms): a32.out/1267727  ... [continued]: brk())                                              = 0x57f54000
       0.337 (         ): a32.out/1267727 exit_group()                                                          = ?

Thanks,
Namhyung

> 
> Remove some runtime types used by the system call tables and make
> equivalents generated at build time.
> 
> v5: Add byte swap to dso__e_machine and fix comment as suggested by
>     Namhyung.
> 
> v4: Add reading the e_machine from the thread's maps dsos, only read
>     from /proc/pid/exe on failure and when live as requested by
>     Namhyung. Add patches to add dso comments and remove unused
>     dso_data variables that are unused without libunwind.
> 
> v3: Add Charlie's reviewed-by tags. Incorporate feedback from Arnd
>     Bergmann <arnd@arndb.de> on additional optional column and MIPS
>     system call numbering. Rebase past Namhyung's global system call
>     statistics and add comments that they don't yet support an
>     e_machine other than EM_HOST.
> 
> v2: Change the 1 element cache for the last table as suggested by
>     Howard Chu, add Howard's reviewed-by tags.
>     Add a comment and apology to Charlie for not doing better in
>     guiding:
>     https://lore.kernel.org/all/20250114-perf_syscall_arch_runtime-v1-1-5b304e408e11@rivosinc.com/
>     After discussion on v1 and he agreed this patch series would be
>     the better direction.
> 
> Ian Rogers (11):
>   perf dso: Move libunwind dso_data variables into ifdef
>   perf dso: kernel-doc for enum dso_binary_type
>   perf syscalltbl: Remove syscall_table.h
>   perf trace: Reorganize syscalls
>   perf syscalltbl: Remove struct syscalltbl
>   perf dso: Add support for reading the e_machine type for a dso
>   perf thread: Add support for reading the e_machine type for a thread
>   perf trace beauty: Add syscalltbl.sh generating all system call tables
>   perf syscalltbl: Use lookup table containing multiple architectures
>   perf build: Remove Makefile.syscalls
>   perf syscalltbl: Mask off ABI type for MIPS system calls
> 
>  tools/perf/Makefile.perf                      |  10 +-
>  tools/perf/arch/alpha/entry/syscalls/Kbuild   |   2 -
>  .../alpha/entry/syscalls/Makefile.syscalls    |   5 -
>  tools/perf/arch/alpha/include/syscall_table.h |   2 -
>  tools/perf/arch/arc/entry/syscalls/Kbuild     |   2 -
>  .../arch/arc/entry/syscalls/Makefile.syscalls |   3 -
>  tools/perf/arch/arc/include/syscall_table.h   |   2 -
>  tools/perf/arch/arm/entry/syscalls/Kbuild     |   4 -
>  .../arch/arm/entry/syscalls/Makefile.syscalls |   2 -
>  tools/perf/arch/arm/include/syscall_table.h   |   2 -
>  tools/perf/arch/arm64/entry/syscalls/Kbuild   |   3 -
>  .../arm64/entry/syscalls/Makefile.syscalls    |   6 -
>  tools/perf/arch/arm64/include/syscall_table.h |   8 -
>  tools/perf/arch/csky/entry/syscalls/Kbuild    |   2 -
>  .../csky/entry/syscalls/Makefile.syscalls     |   3 -
>  tools/perf/arch/csky/include/syscall_table.h  |   2 -
>  .../perf/arch/loongarch/entry/syscalls/Kbuild |   2 -
>  .../entry/syscalls/Makefile.syscalls          |   3 -
>  .../arch/loongarch/include/syscall_table.h    |   2 -
>  tools/perf/arch/mips/entry/syscalls/Kbuild    |   2 -
>  .../mips/entry/syscalls/Makefile.syscalls     |   5 -
>  tools/perf/arch/mips/include/syscall_table.h  |   2 -
>  tools/perf/arch/parisc/entry/syscalls/Kbuild  |   3 -
>  .../parisc/entry/syscalls/Makefile.syscalls   |   6 -
>  .../perf/arch/parisc/include/syscall_table.h  |   8 -
>  tools/perf/arch/powerpc/entry/syscalls/Kbuild |   3 -
>  .../powerpc/entry/syscalls/Makefile.syscalls  |   6 -
>  .../perf/arch/powerpc/include/syscall_table.h |   8 -
>  tools/perf/arch/riscv/entry/syscalls/Kbuild   |   2 -
>  .../riscv/entry/syscalls/Makefile.syscalls    |   4 -
>  tools/perf/arch/riscv/include/syscall_table.h |   8 -
>  tools/perf/arch/s390/entry/syscalls/Kbuild    |   2 -
>  .../s390/entry/syscalls/Makefile.syscalls     |   5 -
>  tools/perf/arch/s390/include/syscall_table.h  |   2 -
>  tools/perf/arch/sh/entry/syscalls/Kbuild      |   2 -
>  .../arch/sh/entry/syscalls/Makefile.syscalls  |   4 -
>  tools/perf/arch/sh/include/syscall_table.h    |   2 -
>  tools/perf/arch/sparc/entry/syscalls/Kbuild   |   3 -
>  .../sparc/entry/syscalls/Makefile.syscalls    |   5 -
>  tools/perf/arch/sparc/include/syscall_table.h |   8 -
>  tools/perf/arch/x86/entry/syscalls/Kbuild     |   3 -
>  .../arch/x86/entry/syscalls/Makefile.syscalls |   6 -
>  tools/perf/arch/x86/include/syscall_table.h   |   8 -
>  tools/perf/arch/xtensa/entry/syscalls/Kbuild  |   2 -
>  .../xtensa/entry/syscalls/Makefile.syscalls   |   4 -
>  .../perf/arch/xtensa/include/syscall_table.h  |   2 -
>  tools/perf/builtin-trace.c                    | 290 +++++++++++-------
>  tools/perf/scripts/Makefile.syscalls          |  61 ----
>  tools/perf/scripts/syscalltbl.sh              |  86 ------
>  tools/perf/trace/beauty/syscalltbl.sh         | 274 +++++++++++++++++
>  tools/perf/util/dso.c                         |  88 ++++++
>  tools/perf/util/dso.h                         |  58 ++++
>  tools/perf/util/symbol-elf.c                  |  27 --
>  tools/perf/util/syscalltbl.c                  | 148 ++++-----
>  tools/perf/util/syscalltbl.h                  |  22 +-
>  tools/perf/util/thread.c                      |  80 +++++
>  tools/perf/util/thread.h                      |  14 +-
>  57 files changed, 792 insertions(+), 536 deletions(-)
>  delete mode 100644 tools/perf/arch/alpha/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/alpha/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/alpha/include/syscall_table.h
>  delete mode 100644 tools/perf/arch/arc/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/arc/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/arc/include/syscall_table.h
>  delete mode 100644 tools/perf/arch/arm/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/arm/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/arm/include/syscall_table.h
>  delete mode 100644 tools/perf/arch/arm64/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/arm64/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/arm64/include/syscall_table.h
>  delete mode 100644 tools/perf/arch/csky/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/csky/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/csky/include/syscall_table.h
>  delete mode 100644 tools/perf/arch/loongarch/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/loongarch/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/loongarch/include/syscall_table.h
>  delete mode 100644 tools/perf/arch/mips/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/mips/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/mips/include/syscall_table.h
>  delete mode 100644 tools/perf/arch/parisc/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/parisc/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/parisc/include/syscall_table.h
>  delete mode 100644 tools/perf/arch/powerpc/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/powerpc/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/powerpc/include/syscall_table.h
>  delete mode 100644 tools/perf/arch/riscv/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/riscv/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/riscv/include/syscall_table.h
>  delete mode 100644 tools/perf/arch/s390/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/s390/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/s390/include/syscall_table.h
>  delete mode 100644 tools/perf/arch/sh/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/sh/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/sh/include/syscall_table.h
>  delete mode 100644 tools/perf/arch/sparc/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/sparc/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/sparc/include/syscall_table.h
>  delete mode 100644 tools/perf/arch/x86/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/x86/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/x86/include/syscall_table.h
>  delete mode 100644 tools/perf/arch/xtensa/entry/syscalls/Kbuild
>  delete mode 100644 tools/perf/arch/xtensa/entry/syscalls/Makefile.syscalls
>  delete mode 100644 tools/perf/arch/xtensa/include/syscall_table.h
>  delete mode 100644 tools/perf/scripts/Makefile.syscalls
>  delete mode 100755 tools/perf/scripts/syscalltbl.sh
>  create mode 100755 tools/perf/trace/beauty/syscalltbl.sh
> 
> -- 
> 2.49.0.rc0.332.g42c0ae87b1-goog
> 

Re: [PATCH v5 09/11] perf syscalltbl: Use lookup table containing multiple architectures

[Arnaldo Carvalho de Melo]

On Fri, Mar 07, 2025 at 04:32:07PM -0800, Ian Rogers wrote:
> Switch to use the lookup table containing all architectures rather
> than tables matching the perf binary.
> 
> This fixes perf trace when executed on a 32-bit i386 binary on an
> x86-64 machine. Note in the following the system call names of the
> 32-bit i386 binary as seen by an x86-64 perf.
> 

Reproduced the results here:

root@number:/home/acme/c# file faccessat2
faccessat2: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, BuildID[sha1]=8dafcc1549658d57248dce883e8ec7eea3d6e8a5, for GNU/Linux 3.2.0, not stripped
root@number:/home/acme/c#

root@number:/home/acme/c# strace ./faccessat2 |& head 
execve("./faccessat2", ["./faccessat2"], 0x7ffce63265e0 /* 39 vars */) = 0
[ Process PID=2552445 runs in 32 bit mode. ]
brk(NULL)                               = 0x849a000
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xf7fb3000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 3
statx(3, "", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT|AT_EMPTY_PATH, STATX_BASIC_STATS, {stx_mask=STATX_ALL|STATX_MNT_ID|STATX_SUBVOL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=85091, ...}) = 0
mmap2(NULL, 85091, PROT_READ, MAP_PRIVATE, 3, 0) = 0xf7f9e000
close(3)                                = 0
openat(AT_FDCWD, "/lib/libc.so.6", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 3
root@number:/home/acme/c#

Before:

root@number:/home/acme/c# perf trace ./faccessat2 |& head
faccessat2(123, (null), X_OK, AT_EACCESS | AT_SYMLINK_NOFOLLOW) = -1
         ? (         ): faccessat2/2552543  ... [continued]: munmap())                                           = 0
     0.024 ( 0.002 ms): faccessat2/2552543 recvfrom(ubuf: 0x2, size: 4159848428, flags: DONTROUTE|CTRUNC|TRUNC|DONTWAIT|EOR|WAITALL|FIN|SYN|CONFIRM|RST|ERRQUEUE|SOCK_DEVMEM|ZEROCOPY|FASTOPEN|CMSG_CLOEXEC|0x91f20000, addr: 0xe30, addr_len: 0xffcda98c) = 138993664
     0.047 ( 0.006 ms): faccessat2/2552543 lgetxattr(name: "", value: 0x3, size: 34)                             = 4159602688
     0.063 ( 0.003 ms): faccessat2/2552543 dup2(oldfd: -135160188, newfd: 4)                                     = -1 ENOENT (No such file or directory)
     0.071 ( 0.023 ms): faccessat2/2552543 preadv(fd: 4294967196, vec: 0xf7f16420, vlen: 557056, pos_h: 4159848428) = 3
     0.098 ( 0.004 ms): faccessat2/2552543 lgetxattr(name: "", value: 0x1, size: 2)                              = 4159516672
     0.104 ( 0.001 ms): faccessat2/2552543 lstat(filename: "", statbuf: 0x14c63)                                 = 0
     0.114 ( 0.004 ms): faccessat2/2552543 preadv(fd: 4294967196, vec: 0xf7ee8380, vlen: 557056, pos_h: 4159848428) = 3
     0.118 ( 0.002 ms): faccessat2/2552543 close(fd: 3)                                                          = 512
root@number:/home/acme/c# 

After:

root@number:/home/acme/c# perf trace ./faccessat2 |& head
faccessat2(123, (null), X_OK, AT_EACCESS | AT_SYMLINK_NOFOLLOW) = -1
sh: line 1: perf-read-vdso32: command not found
         ? (         ): faccessat2/2556897  ... [continued]: execve())                                           = 0
     0.028 ( 0.002 ms): faccessat2/2556897 brk()                                                                 = 0x8fe4000
     0.068 ( 0.003 ms): faccessat2/2556897 access(filename: 0xf7ff2e84, mode: R)                                 = -1 ENOENT (No such file or directory)
     0.080 ( 0.005 ms): faccessat2/2556897 openat(dfd: CWD, filename: "/etc/ld.so.cache", flags: RDONLY|CLOEXEC|LARGEFILE) = 3
     0.094 ( 0.001 ms): faccessat2/2556897 close(fd: 3)                                                          = 0
     0.103 ( 0.003 ms): faccessat2/2556897 openat(dfd: CWD, filename: "/lib/libc.so.6", flags: RDONLY|CLOEXEC|LARGEFILE) = 3
     0.108 ( 0.002 ms): faccessat2/2556897 read(fd: 3, buf: 0xffdd84b0, count: 512)                              = 512
     0.216 ( 0.001 ms): faccessat2/2556897 close(fd: 3)                                                          = 0
root@number:/home/acme/c#

And interestingly the openat syscall got its contents obtained via the
BPF augmenter... better to test this more thoroughly, but I think it
should come after this series lands.

- Arnaldo

Re: [PATCH v5 00/11] perf: Support multiple system call tables in the build

[Arnaldo Carvalho de Melo]

On Thu, Mar 13, 2025 at 12:11:40AM -0700, Namhyung Kim wrote:
> On Fri, Mar 07, 2025 at 04:31:58PM -0800, Ian Rogers wrote:
> > This work builds on the clean up of system call tables and removal of
> > libaudit by Charlie Jenkins <charlie@rivosinc.com>.
> > 
> > The system call table in perf trace is used to map system call numbers
> > to names and vice versa. Prior to these changes, a single table
> > matching the perf binary's build was present. The table would be
> > incorrect if tracing say a 32-bit binary from a 64-bit version of
> > perf, the names and numbers wouldn't match.
> > 
> > Change the build so that a single system call file is built and the
> > potentially multiple tables are identifiable from the ELF machine type
> > of the process being examined. To determine the ELF machine type, the
> > executable's maps are searched and the associated DSOs ELF headers are
> > read. When this fails and when live, /proc/pid/exe's ELF header is
> > read. Fallback to using the perf's binary type when unknown.
> 
> Now it works well for me!

Its working for me on x86_64 as well, I'm doing some more tests, the
container builds and will do 32-bit tracing on 64-bit ARM (rpi5 aarch64)
and then report results here, should be later today as the default
kernel for the rpi5 doesn't come with CONFIG_FTRACE_SYSCALLS=y and BTF,
so building one with it.

- Arnaldo

Re: [PATCH v5 09/11] perf syscalltbl: Use lookup table containing multiple architectures

[Namhyung Kim]

On Thu, Mar 13, 2025 at 04:21:36PM -0300, Arnaldo Carvalho de Melo wrote:
> On Fri, Mar 07, 2025 at 04:32:07PM -0800, Ian Rogers wrote:
> > Switch to use the lookup table containing all architectures rather
> > than tables matching the perf binary.
> > 
> > This fixes perf trace when executed on a 32-bit i386 binary on an
> > x86-64 machine. Note in the following the system call names of the
> > 32-bit i386 binary as seen by an x86-64 perf.
> > 
> 
> Reproduced the results here:
> 
> root@number:/home/acme/c# file faccessat2
> faccessat2: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, BuildID[sha1]=8dafcc1549658d57248dce883e8ec7eea3d6e8a5, for GNU/Linux 3.2.0, not stripped
> root@number:/home/acme/c#
> 
> root@number:/home/acme/c# strace ./faccessat2 |& head 
> execve("./faccessat2", ["./faccessat2"], 0x7ffce63265e0 /* 39 vars */) = 0
> [ Process PID=2552445 runs in 32 bit mode. ]
> brk(NULL)                               = 0x849a000
> mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xf7fb3000
> access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
> openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 3
> statx(3, "", AT_STATX_SYNC_AS_STAT|AT_NO_AUTOMOUNT|AT_EMPTY_PATH, STATX_BASIC_STATS, {stx_mask=STATX_ALL|STATX_MNT_ID|STATX_SUBVOL, stx_attributes=0, stx_mode=S_IFREG|0644, stx_size=85091, ...}) = 0
> mmap2(NULL, 85091, PROT_READ, MAP_PRIVATE, 3, 0) = 0xf7f9e000
> close(3)                                = 0
> openat(AT_FDCWD, "/lib/libc.so.6", O_RDONLY|O_LARGEFILE|O_CLOEXEC) = 3
> root@number:/home/acme/c#
> 
> Before:
> 
> root@number:/home/acme/c# perf trace ./faccessat2 |& head
> faccessat2(123, (null), X_OK, AT_EACCESS | AT_SYMLINK_NOFOLLOW) = -1
>          ? (         ): faccessat2/2552543  ... [continued]: munmap())                                           = 0
>      0.024 ( 0.002 ms): faccessat2/2552543 recvfrom(ubuf: 0x2, size: 4159848428, flags: DONTROUTE|CTRUNC|TRUNC|DONTWAIT|EOR|WAITALL|FIN|SYN|CONFIRM|RST|ERRQUEUE|SOCK_DEVMEM|ZEROCOPY|FASTOPEN|CMSG_CLOEXEC|0x91f20000, addr: 0xe30, addr_len: 0xffcda98c) = 138993664
>      0.047 ( 0.006 ms): faccessat2/2552543 lgetxattr(name: "", value: 0x3, size: 34)                             = 4159602688
>      0.063 ( 0.003 ms): faccessat2/2552543 dup2(oldfd: -135160188, newfd: 4)                                     = -1 ENOENT (No such file or directory)
>      0.071 ( 0.023 ms): faccessat2/2552543 preadv(fd: 4294967196, vec: 0xf7f16420, vlen: 557056, pos_h: 4159848428) = 3
>      0.098 ( 0.004 ms): faccessat2/2552543 lgetxattr(name: "", value: 0x1, size: 2)                              = 4159516672
>      0.104 ( 0.001 ms): faccessat2/2552543 lstat(filename: "", statbuf: 0x14c63)                                 = 0
>      0.114 ( 0.004 ms): faccessat2/2552543 preadv(fd: 4294967196, vec: 0xf7ee8380, vlen: 557056, pos_h: 4159848428) = 3
>      0.118 ( 0.002 ms): faccessat2/2552543 close(fd: 3)                                                          = 512
> root@number:/home/acme/c# 
> 
> After:
> 
> root@number:/home/acme/c# perf trace ./faccessat2 |& head
> faccessat2(123, (null), X_OK, AT_EACCESS | AT_SYMLINK_NOFOLLOW) = -1
> sh: line 1: perf-read-vdso32: command not found
>          ? (         ): faccessat2/2556897  ... [continued]: execve())                                           = 0
>      0.028 ( 0.002 ms): faccessat2/2556897 brk()                                                                 = 0x8fe4000
>      0.068 ( 0.003 ms): faccessat2/2556897 access(filename: 0xf7ff2e84, mode: R)                                 = -1 ENOENT (No such file or directory)
>      0.080 ( 0.005 ms): faccessat2/2556897 openat(dfd: CWD, filename: "/etc/ld.so.cache", flags: RDONLY|CLOEXEC|LARGEFILE) = 3
>      0.094 ( 0.001 ms): faccessat2/2556897 close(fd: 3)                                                          = 0
>      0.103 ( 0.003 ms): faccessat2/2556897 openat(dfd: CWD, filename: "/lib/libc.so.6", flags: RDONLY|CLOEXEC|LARGEFILE) = 3
>      0.108 ( 0.002 ms): faccessat2/2556897 read(fd: 3, buf: 0xffdd84b0, count: 512)                              = 512
>      0.216 ( 0.001 ms): faccessat2/2556897 close(fd: 3)                                                          = 0
> root@number:/home/acme/c#
> 
> And interestingly the openat syscall got its contents obtained via the
> BPF augmenter... better to test this more thoroughly, but I think it
> should come after this series lands.

Right, I don't see the filename in openat() in my tests.

openat() is 295 on i386 and that's preadv() on x86_64 so BPF won't try
to augment the argument.  I wonder how it can get the filename.  But
anyway we can take a look later.

Thanks,
Namhyung

Re: [PATCH v5 00/11] perf: Support multiple system call tables in the build

[Arnaldo Carvalho de Melo]

On Thu, Mar 13, 2025 at 04:49:52PM -0300, Arnaldo Carvalho de Melo wrote:
> On Thu, Mar 13, 2025 at 12:11:40AM -0700, Namhyung Kim wrote:
> > On Fri, Mar 07, 2025 at 04:31:58PM -0800, Ian Rogers wrote:
> > > This work builds on the clean up of system call tables and removal of
> > > libaudit by Charlie Jenkins <charlie@rivosinc.com>.
> > > 
> > > The system call table in perf trace is used to map system call numbers
> > > to names and vice versa. Prior to these changes, a single table
> > > matching the perf binary's build was present. The table would be
> > > incorrect if tracing say a 32-bit binary from a 64-bit version of
> > > perf, the names and numbers wouldn't match.
> > > 
> > > Change the build so that a single system call file is built and the
> > > potentially multiple tables are identifiable from the ELF machine type
> > > of the process being examined. To determine the ELF machine type, the
> > > executable's maps are searched and the associated DSOs ELF headers are
> > > read. When this fails and when live, /proc/pid/exe's ELF header is
> > > read. Fallback to using the perf's binary type when unknown.
> > 
> > Now it works well for me!
> 
> Its working for me on x86_64 as well, I'm doing some more tests, the
> container builds and will do 32-bit tracing on 64-bit ARM (rpi5 aarch64)
> and then report results here, should be later today as the default
> kernel for the rpi5 doesn't come with CONFIG_FTRACE_SYSCALLS=y and BTF,
> so building one with it.

Still building, but noticed this on x86_64:

105: perf trace enum augmentation tests                              : FAILED!
106: perf trace BTF general tests                                    : FAILED!
107: perf trace exit race                                            : Ok
108: perf trace record and replay                                    : FAILED!


The first doesn´t help that much with verbose mode, haven't checked if
before this series it was failing :-\

root@x1:~# perf test -vvv 105
105: perf trace enum augmentation tests:
--- start ---
test child forked, pid 19411
Checking if vmlinux exists
Tracing syscall landlock_add_rule
---- end(-1) ----
105: perf trace enum augmentation tests                              : FAILED!
root@x1:~#

Ditto for 106:

root@x1:~# perf test -vv 106
106: perf trace BTF general tests:
--- start ---
test child forked, pid 19467
Checking if vmlinux BTF exists
Testing perf trace's string augmentation
Testing perf trace's buffer augmentation
Buffer augmentation test failed
---- end(-1) ----
106: perf trace BTF general tests                                    : FAILED!
root@x1:~# 

108 works when its the only test:

root@x1:~# perf test 108
108: perf trace record and replay                                    : Ok
root@x1:~# perf test 108
108: perf trace record and replay                                    : Ok
root@x1:~# perf test 108
108: perf trace record and replay                                    : Ok
root@x1:~#

I'll try to check what is happening with the first two later today.

- Arnaldo

Re: [PATCH v5 00/11] perf: Support multiple system call tables in the build

[Arnaldo Carvalho de Melo]

On Thu, Mar 13, 2025 at 05:20:09PM -0300, Arnaldo Carvalho de Melo wrote:
> Still building, but noticed this on x86_64:
> 
> 105: perf trace enum augmentation tests                              : FAILED!
> 106: perf trace BTF general tests                                    : FAILED!
> 107: perf trace exit race                                            : Ok
> 108: perf trace record and replay                                    : FAILED!
> 
> 
> The first doesn´t help that much with verbose mode, haven't checked if
> before this series it was failing :-\
> 
> root@x1:~# perf test -vvv 105
> 105: perf trace enum augmentation tests:
> --- start ---
> test child forked, pid 19411
> Checking if vmlinux exists
> Tracing syscall landlock_add_rule
> ---- end(-1) ----
> 105: perf trace enum augmentation tests                              : FAILED!
> root@x1:~#

So:

root@x1:~# perf trace -e landlock_add_rule perf test -w landlock
root@x1:~# 

But:

root@x1:~# perf trace perf test -w landlock |& grep landlock_add_rule
    26.120 ( 0.002 ms): perf/19791 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_PATH_BENEATH, rule_attr: 0x7ffde75e2680, flags: 45) = -1 EINVAL (Invalid argument)
    26.124 ( 0.001 ms): perf/19791 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_NET_PORT, rule_attr: 0x7ffde75e2690, flags: 45) = -1 EINVAL (Invalid argument)
root@x1:~# 

-e is having some trouble, when no event is specified, then it works.

Something in the changes made to:

static int trace__parse_events_option(const struct option *opt, const char *str,
                                      int unset __maybe_unused)


- Arnaldo

More data:

root@x1:~# perf trace -vvv -e landlock_add_rule perf test -w landlock
Using CPUID GenuineIntel-6-BA-3
Opening: cpu/cycles/
------------------------------------------------------------
perf_event_attr:
  type                             0 (PERF_TYPE_HARDWARE)
  config                           0xa00000000 (cpu_atom/PERF_COUNT_HW_CPU_CYCLES/)
  disabled                         1
------------------------------------------------------------
sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8 = 27
Opening: cpu/cycles/
------------------------------------------------------------
perf_event_attr:
  type                             0 (PERF_TYPE_HARDWARE)
  config                           0x400000000 (cpu_core/PERF_COUNT_HW_CPU_CYCLES/)
  disabled                         1
------------------------------------------------------------
sys_perf_event_open: pid 0  cpu -1  group_fd -1  flags 0x8 = 28
Opening: raw_syscalls:sys_enter
------------------------------------------------------------
perf_event_attr:
  type                             2 (PERF_TYPE_TRACEPOINT)
  size                             136
  config                           0x197 (raw_syscalls:sys_enter)
  { sample_period, sample_freq }   1
  sample_type                      IP|TID|TIME|ID|CPU|PERIOD|RAW
  read_format                      ID|LOST
  disabled                         1
  inherit                          1
  mmap                             1
  comm                             1
  enable_on_exec                   1
  task                             1
  sample_id_all                    1
  mmap2                            1
  comm_exec                        1
  ksymbol                          1
  bpf_event                        1
  { wakeup_events, wakeup_watermark } 1
------------------------------------------------------------
sys_perf_event_open: pid 19786  cpu 0  group_fd -1  flags 0x8 = 29
sys_perf_event_open: pid 19786  cpu 1  group_fd -1  flags 0x8 = 30
sys_perf_event_open: pid 19786  cpu 2  group_fd -1  flags 0x8 = 31
sys_perf_event_open: pid 19786  cpu 3  group_fd -1  flags 0x8 = 33
sys_perf_event_open: pid 19786  cpu 4  group_fd -1  flags 0x8 = 34
sys_perf_event_open: pid 19786  cpu 5  group_fd -1  flags 0x8 = 35
sys_perf_event_open: pid 19786  cpu 6  group_fd -1  flags 0x8 = 36
sys_perf_event_open: pid 19786  cpu 7  group_fd -1  flags 0x8 = 37
sys_perf_event_open: pid 19786  cpu 8  group_fd -1  flags 0x8 = 38
sys_perf_event_open: pid 19786  cpu 9  group_fd -1  flags 0x8 = 39
sys_perf_event_open: pid 19786  cpu 10  group_fd -1  flags 0x8 = 40
sys_perf_event_open: pid 19786  cpu 11  group_fd -1  flags 0x8 = 41
Opening: raw_syscalls:sys_exit
------------------------------------------------------------
perf_event_attr:
  type                             2 (PERF_TYPE_TRACEPOINT)
  size                             136
  config                           0x196 (raw_syscalls:sys_exit)
  { sample_period, sample_freq }   1
  sample_type                      IP|TID|TIME|ID|CPU|PERIOD|RAW
  read_format                      ID|LOST
  disabled                         1
  inherit                          1
  enable_on_exec                   1
  sample_id_all                    1
  { wakeup_events, wakeup_watermark } 1
------------------------------------------------------------
sys_perf_event_open: pid 19786  cpu 0  group_fd -1  flags 0x8 = 42
sys_perf_event_open: pid 19786  cpu 1  group_fd -1  flags 0x8 = 43
sys_perf_event_open: pid 19786  cpu 2  group_fd -1  flags 0x8 = 44
sys_perf_event_open: pid 19786  cpu 3  group_fd -1  flags 0x8 = 45
sys_perf_event_open: pid 19786  cpu 4  group_fd -1  flags 0x8 = 46
sys_perf_event_open: pid 19786  cpu 5  group_fd -1  flags 0x8 = 47
sys_perf_event_open: pid 19786  cpu 6  group_fd -1  flags 0x8 = 48
sys_perf_event_open: pid 19786  cpu 7  group_fd -1  flags 0x8 = 49
sys_perf_event_open: pid 19786  cpu 8  group_fd -1  flags 0x8 = 50
sys_perf_event_open: pid 19786  cpu 9  group_fd -1  flags 0x8 = 51
sys_perf_event_open: pid 19786  cpu 10  group_fd -1  flags 0x8 = 52
sys_perf_event_open: pid 19786  cpu 11  group_fd -1  flags 0x8 = 53
Opening: __augmented_syscalls__
------------------------------------------------------------
perf_event_attr:
  type                             1 (PERF_TYPE_SOFTWARE)
  size                             136
  config                           0xa (PERF_COUNT_SW_BPF_OUTPUT)
  { sample_period, sample_freq }   1
  sample_type                      IP|TID|TIME|ID|CPU|PERIOD|RAW
  read_format                      ID|LOST
  disabled                         1
  enable_on_exec                   1
  sample_id_all                    1
  { wakeup_events, wakeup_watermark } 1
------------------------------------------------------------
sys_perf_event_open: pid 19786  cpu 0  group_fd -1  flags 0x8 = 54
sys_perf_event_open: pid 19786  cpu 1  group_fd -1  flags 0x8 = 55
sys_perf_event_open: pid 19786  cpu 2  group_fd -1  flags 0x8 = 56
sys_perf_event_open: pid 19786  cpu 3  group_fd -1  flags 0x8 = 57
sys_perf_event_open: pid 19786  cpu 4  group_fd -1  flags 0x8 = 58
sys_perf_event_open: pid 19786  cpu 5  group_fd -1  flags 0x8 = 59
sys_perf_event_open: pid 19786  cpu 6  group_fd -1  flags 0x8 = 60
sys_perf_event_open: pid 19786  cpu 7  group_fd -1  flags 0x8 = 61
sys_perf_event_open: pid 19786  cpu 8  group_fd -1  flags 0x8 = 62
sys_perf_event_open: pid 19786  cpu 9  group_fd -1  flags 0x8 = 63
sys_perf_event_open: pid 19786  cpu 10  group_fd -1  flags 0x8 = 64
sys_perf_event_open: pid 19786  cpu 11  group_fd -1  flags 0x8 = 65
Problems reading syscall 156: 2 (No such file or directory)(_sysctl) information
Problems reading syscall 183: 2 (No such file or directory)(afs_syscall) information
Problems reading syscall 174: 2 (No such file or directory)(create_module) information
Problems reading syscall 214: 2 (No such file or directory)(epoll_ctl_old) information
Problems reading syscall 215: 2 (No such file or directory)(epoll_wait_old) information
Problems reading syscall 177: 2 (No such file or directory)(get_kernel_syms) information
Problems reading syscall 211: 2 (No such file or directory)(get_thread_area) information
Problems reading syscall 181: 2 (No such file or directory)(getpmsg) information
vmlinux BTF loaded
Problems reading syscall 212: 2 (No such file or directory)(lookup_dcookie) information
Problems reading syscall 180: 2 (No such file or directory)(nfsservctl) information
Problems reading syscall 182: 2 (No such file or directory)(putpmsg) information
Problems reading syscall 178: 2 (No such file or directory)(query_module) information
Problems reading syscall 185: 2 (No such file or directory)(security) information
Problems reading syscall 205: 2 (No such file or directory)(set_thread_area) information
Problems reading syscall 184: 2 (No such file or directory)(tuxcall) information
Problems reading syscall 134: 2 (No such file or directory)(uselib) information
Problems reading syscall 236: 2 (No such file or directory)(vserver) information
event qualifier tracepoint filter: id == 29098429
mmap size 528384B
libperf: mmap_per_cpu: nr cpu values 12 nr threads 1
libperf: idx 0: mmapping fd 29
<SNIP>
root@x1:~#

root@x1:~# cat /sys/kernel/tracing/events/syscalls/sys_enter_landlock_add_rule/id
1449
root@x1:~# perf trace -e landlock_add_rule perf test -w landlock
root@x1:~# strace -e landlock_add_rule perf test -w landlock
landlock_add_rule(11, LANDLOCK_RULE_PATH_BENEATH, {allowed_access=LANDLOCK_ACCESS_FS_READ_FILE, parent_fd=14}, 0x2d) = -1 EINVAL (Invalid argument)
landlock_add_rule(11, LANDLOCK_RULE_NET_PORT, {allowed_access=LANDLOCK_ACCESS_NET_CONNECT_TCP, port=19}, 0x2d) = -1 EINVAL (Invalid argument)
+++ exited with 0 +++
root@x1:~# 

root@x1:~# vim /tmp/build/perf-tools-next/trace/beauty/generated/syscalltbl.c
<SNIP>
static const char *const syscall_num_to_name_EM_X86_64[] = {
	[0] = "read",
	[1] = "write",
	[2] = "open",
<SNIP>
	[442] = "mount_setattr",
	[443] = "quotactl_fd",
	[444] = "landlock_create_ruleset",
	[445] = "landlock_add_rule",
	[446] = "landlock_restrict_self",
	[447] = "memfd_secret",
	[448] = "process_mrelease",
	[449] = "futex_waitv",
	[450] = "set_mempolicy_home_node",
<SNIP>
};
static const uint16_t syscall_sorted_names_EM_X86_64[] = {
	156,	/* _sysctl */
	43,	/* accept */
	288,	/* accept4 */
<SNIP>
	246,	/* kexec_load */
	250,	/* keyctl */
	62,	/* kill */
	445,	/* landlock_add_rule */
	444,	/* landlock_create_ruleset */
	446,	/* landlock_restrict_self */
	94,	/* lchown */
	192,	/* lgetxattr */
<SNIP>
};

<SNIP>

#if defined(ALL_SYSCALLTBL) || defined(__i386__) || defined(__x86_64__)
       {
	      .num_to_name = syscall_num_to_name_EM_386,
	      .sorted_names = syscall_sorted_names_EM_386,
	      .e_machine = EM_386,
	      .num_to_name_len = ARRAY_SIZE(syscall_num_to_name_EM_386),
	      .sorted_names_len = ARRAY_SIZE(syscall_sorted_names_EM_386),
       },
       {
	      .num_to_name = syscall_num_to_name_EM_X86_64,
	      .sorted_names = syscall_sorted_names_EM_X86_64,
	      .e_machine = EM_X86_64,
	      .num_to_name_len = ARRAY_SIZE(syscall_num_to_name_EM_X86_64),
	      .sorted_names_len = ARRAY_SIZE(syscall_sorted_names_EM_X86_64),
       },
#endif // defined(ALL_SYSCALLTBL) || defined(__i386__) || defined(__x86_64__)

<SNIP>

Re: [PATCH v5 00/11] perf: Support multiple system call tables in the build

[Namhyung Kim]

On Thu, Mar 13, 2025 at 05:47:27PM -0300, Arnaldo Carvalho de Melo wrote:
> On Thu, Mar 13, 2025 at 05:20:09PM -0300, Arnaldo Carvalho de Melo wrote:
> > Still building, but noticed this on x86_64:
> > 
> > 105: perf trace enum augmentation tests                              : FAILED!
> > 106: perf trace BTF general tests                                    : FAILED!
> > 107: perf trace exit race                                            : Ok
> > 108: perf trace record and replay                                    : FAILED!
> > 
> > 
> > The first doesn´t help that much with verbose mode, haven't checked if
> > before this series it was failing :-\
> > 
> > root@x1:~# perf test -vvv 105
> > 105: perf trace enum augmentation tests:
> > --- start ---
> > test child forked, pid 19411
> > Checking if vmlinux exists
> > Tracing syscall landlock_add_rule
> > ---- end(-1) ----
> > 105: perf trace enum augmentation tests                              : FAILED!
> > root@x1:~#
> 
> So:
> 
> root@x1:~# perf trace -e landlock_add_rule perf test -w landlock
> root@x1:~# 
> 
> But:
> 
> root@x1:~# perf trace perf test -w landlock |& grep landlock_add_rule
>     26.120 ( 0.002 ms): perf/19791 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_PATH_BENEATH, rule_attr: 0x7ffde75e2680, flags: 45) = -1 EINVAL (Invalid argument)
>     26.124 ( 0.001 ms): perf/19791 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_NET_PORT, rule_attr: 0x7ffde75e2690, flags: 45) = -1 EINVAL (Invalid argument)
> root@x1:~# 
> 
> -e is having some trouble, when no event is specified, then it works.
> 
> Something in the changes made to:
> 
> static int trace__parse_events_option(const struct option *opt, const char *str,
>                                       int unset __maybe_unused)

Thanks for the test, I think this should fix it:

Thanks,
Namhyung


---8<---
diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c
index ace66e69c1bcde1e..67a8ec10e9e4bc8d 100644
--- a/tools/perf/util/syscalltbl.c
+++ b/tools/perf/util/syscalltbl.c
@@ -76,7 +76,7 @@ int syscalltbl__id(int e_machine, const char *name)
 {
        const struct syscalltbl *table = find_table(e_machine);
        struct syscall_cmp_key key;
-       const int *id;
+       const uint16_t *id;
 
        if (!table)
                return -1;

Re: [PATCH v5 00/11] perf: Support multiple system call tables in the build

[Arnaldo Carvalho de Melo]

On Thu, Mar 13, 2025 at 10:45:49PM -0700, Namhyung Kim wrote:
> On Thu, Mar 13, 2025 at 05:47:27PM -0300, Arnaldo Carvalho de Melo wrote:
> > On Thu, Mar 13, 2025 at 05:20:09PM -0300, Arnaldo Carvalho de Melo wrote:
> > > Still building, but noticed this on x86_64:
> > > 
> > > 105: perf trace enum augmentation tests                              : FAILED!
> > > 106: perf trace BTF general tests                                    : FAILED!
> > > 107: perf trace exit race                                            : Ok
> > > 108: perf trace record and replay                                    : FAILED!
> > > 
> > > 
> > > The first doesn´t help that much with verbose mode, haven't checked if
> > > before this series it was failing :-\
> > > 
> > > root@x1:~# perf test -vvv 105
> > > 105: perf trace enum augmentation tests:
> > > --- start ---
> > > test child forked, pid 19411
> > > Checking if vmlinux exists
> > > Tracing syscall landlock_add_rule
> > > ---- end(-1) ----
> > > 105: perf trace enum augmentation tests                              : FAILED!
> > > root@x1:~#
> > 
> > So:
> > 
> > root@x1:~# perf trace -e landlock_add_rule perf test -w landlock
> > root@x1:~# 
> > 
> > But:
> > 
> > root@x1:~# perf trace perf test -w landlock |& grep landlock_add_rule
> >     26.120 ( 0.002 ms): perf/19791 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_PATH_BENEATH, rule_attr: 0x7ffde75e2680, flags: 45) = -1 EINVAL (Invalid argument)
> >     26.124 ( 0.001 ms): perf/19791 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_NET_PORT, rule_attr: 0x7ffde75e2690, flags: 45) = -1 EINVAL (Invalid argument)
> > root@x1:~# 
> > 
> > -e is having some trouble, when no event is specified, then it works.
> > 
> > Something in the changes made to:
> > 
> > static int trace__parse_events_option(const struct option *opt, const char *str,
> >                                       int unset __maybe_unused)
> 
> Thanks for the test, I think this should fix it:
> 

Well, not really:

root@number:~# perf trace -e landlock_add_rule perf test -w landlock
perf: Segmentation fault
Obtained 10 stack frames.
perf() [0x5be761]
perf() [0x5be7f9]
/lib64/libc.so.6(+0x40fd0) [0x7fe005c4efd0]
perf() [0x491bc1]
perf() [0x497090]
perf() [0x4973ab]
perf() [0x413483]
/lib64/libc.so.6(+0x2a088) [0x7fe005c38088]
/lib64/libc.so.6(__libc_start_main+0x8b) [0x7fe005c3814b]
perf() [0x413ad5]
Segmentation fault (core dumped)
root@number:~#

Time for me to test another patch from Ian, the one symbolizing the
above backtrace...

- Arnaldo


> 
> 
> ---8<---
> diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c
> index ace66e69c1bcde1e..67a8ec10e9e4bc8d 100644
> --- a/tools/perf/util/syscalltbl.c
> +++ b/tools/perf/util/syscalltbl.c
> @@ -76,7 +76,7 @@ int syscalltbl__id(int e_machine, const char *name)
>  {
>         const struct syscalltbl *table = find_table(e_machine);
>         struct syscall_cmp_key key;
> -       const int *id;
> +       const uint16_t *id;
>  
>         if (!table)
>                 return -1;

Re: [PATCH v5 00/11] perf: Support multiple system call tables in the build

[Arnaldo Carvalho de Melo]

On Fri, Mar 14, 2025 at 02:10:57PM -0300, Arnaldo Carvalho de Melo wrote:
> On Thu, Mar 13, 2025 at 10:45:49PM -0700, Namhyung Kim wrote:
> > On Thu, Mar 13, 2025 at 05:47:27PM -0300, Arnaldo Carvalho de Melo wrote:
> > > On Thu, Mar 13, 2025 at 05:20:09PM -0300, Arnaldo Carvalho de Melo wrote:
> > > > Still building, but noticed this on x86_64:
> > > > 
> > > > 105: perf trace enum augmentation tests                              : FAILED!
> > > > 106: perf trace BTF general tests                                    : FAILED!
> > > > 107: perf trace exit race                                            : Ok
> > > > 108: perf trace record and replay                                    : FAILED!
> > > > 
> > > > 
> > > > The first doesn´t help that much with verbose mode, haven't checked if
> > > > before this series it was failing :-\
> > > > 
> > > > root@x1:~# perf test -vvv 105
> > > > 105: perf trace enum augmentation tests:
> > > > --- start ---
> > > > test child forked, pid 19411
> > > > Checking if vmlinux exists
> > > > Tracing syscall landlock_add_rule
> > > > ---- end(-1) ----
> > > > 105: perf trace enum augmentation tests                              : FAILED!
> > > > root@x1:~#
> > > 
> > > So:
> > > 
> > > root@x1:~# perf trace -e landlock_add_rule perf test -w landlock
> > > root@x1:~# 
> > > 
> > > But:
> > > 
> > > root@x1:~# perf trace perf test -w landlock |& grep landlock_add_rule
> > >     26.120 ( 0.002 ms): perf/19791 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_PATH_BENEATH, rule_attr: 0x7ffde75e2680, flags: 45) = -1 EINVAL (Invalid argument)
> > >     26.124 ( 0.001 ms): perf/19791 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_NET_PORT, rule_attr: 0x7ffde75e2690, flags: 45) = -1 EINVAL (Invalid argument)
> > > root@x1:~# 
> > > 
> > > -e is having some trouble, when no event is specified, then it works.
> > > 
> > > Something in the changes made to:
> > > 
> > > static int trace__parse_events_option(const struct option *opt, const char *str,
> > >                                       int unset __maybe_unused)
> > 
> > Thanks for the test, I think this should fix it:
> > 
> 
> Well, not really:
> 
> root@number:~# perf trace -e landlock_add_rule perf test -w landlock
> perf: Segmentation fault
> Obtained 10 stack frames.
> perf() [0x5be761]
> perf() [0x5be7f9]
> /lib64/libc.so.6(+0x40fd0) [0x7fe005c4efd0]
> perf() [0x491bc1]
> perf() [0x497090]
> perf() [0x4973ab]
> perf() [0x413483]
> /lib64/libc.so.6(+0x2a088) [0x7fe005c38088]
> /lib64/libc.so.6(__libc_start_main+0x8b) [0x7fe005c3814b]
> perf() [0x413ad5]
> Segmentation fault (core dumped)
> root@number:~#
> 
> Time for me to test another patch from Ian, the one symbolizing the
> above backtrace...
> 
> Worked, but didn't help as much, with gdb:
> 
> (gdb) run trace -e landlock_add_rule perf test -w landlock
> Starting program: /root/bin/perf trace -e landlock_add_rule perf test -w landlock
> 
> This GDB supports auto-downloading debuginfo from the following URLs:
>   <https://debuginfod.fedoraproject.org/>
> Enable debuginfod for this session? (y or [n]) y
> Debuginfod has been enabled.
> To make this setting permanent, add 'set debuginfod enabled on' to .gdbinit.
> Downloading 53.88 K separate debug info for system-supplied DSO at 0x7ffff7fc6000
> Downloading 458.26 K separate debug info for /lib64/libtracefs.so.1                                                                                                                            
> [Thread debugging using libthread_db enabled]                                                                                                                                                  
> Using host libthread_db library "/lib64/libthread_db.so.1".
> [Detaching after fork from child process 39141]
> 
> Program received signal SIGSEGV, Segmentation fault.
> 0x00000000004d0e56 in trace__find_usable_bpf_prog_entry (trace=0x7fffffffa510, sc=0x10fb7b0) at builtin-trace.c:3882
> 3882				bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
> (gdb) p field
> $1 = (struct tep_format_field *) 0x64656e6769736e75
> (gdb) bt
> #0  0x00000000004d0e56 in trace__find_usable_bpf_prog_entry (trace=0x7fffffffa510, sc=0x10fb7b0) at builtin-trace.c:3882
> #1  0x00000000004cf3de in trace__init_syscalls_bpf_prog_array_maps (trace=0x7fffffffa510, e_machine=62) at builtin-trace.c:4040
> #2  0x00000000004bf626 in trace__run (trace=0x7fffffffa510, argc=4, argv=0x7fffffffde40) at builtin-trace.c:4473
> #3  0x00000000004bb7a9 in cmd_trace (argc=4, argv=0x7fffffffde40) at builtin-trace.c:5741
> #4  0x00000000004d873f in run_builtin (p=0xf83d48 <commands+648>, argc=7, argv=0x7fffffffde40) at perf.c:351
> #5  0x00000000004d7df3 in handle_internal_command (argc=7, argv=0x7fffffffde40) at perf.c:404
> #6  0x00000000004d860f in run_argv (argcp=0x7fffffffdc7c, argv=0x7fffffffdc70) at perf.c:448
> #7  0x00000000004d7a4f in main (argc=7, argv=0x7fffffffde40) at perf.c:556
> (gdb) list -10
> 3867		return NULL;
> 3868	
> 3869	try_to_find_pair:
> 3870		for (int i = 0, num_idx = syscalltbl__num_idx(sc->e_machine); i < num_idx; ++i) {
> 3871			int id = syscalltbl__id_at_idx(sc->e_machine, i);
> 3872			struct syscall *pair = trace__syscall_info(trace, NULL, sc->e_machine, id);
> 3873			struct bpf_program *pair_prog;
> 3874			bool is_candidate = false;
> 3875	
> 3876			if (pair == NULL || pair == sc ||
> (gdb)

Humm

(gdb) p i
$1 = 147
(gdb) p num_idx
$2 = 379
(gdb) p id
$3 = 192
(gdb) p pair
$4 = (struct syscall *) 0x10fe8f0
(gdb) p *pair
$5 = {e_machine = 62, id = 192, tp_format = 0x10f6c00, nr_args = 3, args_size = 48, bpf_prog = {sys_enter = 0x0, sys_exit = 0x0}, is_exit = false, is_open = false, nonexistent = false, 
  use_btf = false, args = 0x10f9480, name = 0x814406 "lgetxattr", fmt = 0x0, arg_fmt = 0x10fa0a0}
(gdb) p sc
$6 = (struct syscall *) 0x10fb7b0
(gdb) p sc->args
$7 = (struct tep_format_field *) 0x64656e6769736e75
(gdb) p *pair
$8 = {e_machine = 62, id = 192, tp_format = 0x10f6c00, nr_args = 3, args_size = 48, bpf_prog = {sys_enter = 0x0, sys_exit = 0x0}, is_exit = false, is_open = false, nonexistent = false, 
  use_btf = false, args = 0x10f9480, name = 0x814406 "lgetxattr", fmt = 0x0, arg_fmt = 0x10fa0a0}
(gdb)

it finds the pair, but then its sc->args has a bogus pointer... I'll see
where this isn't being initialized...

- Arnaldo

Re: [PATCH v5 00/11] perf: Support multiple system call tables in the build

[Arnaldo Carvalho de Melo]

On Fri, Mar 14, 2025 at 02:26:41PM -0300, Arnaldo Carvalho de Melo wrote:
> it finds the pair, but then its sc->args has a bogus pointer... I'll see
> where this isn't being initialized...

Breakpoint 4, trace__find_usable_bpf_prog_entry (trace=0x7fffffffa510, sc=0x1046f10) at builtin-trace.c:3874
3874			bool is_candidate = false;
(gdb) n
3876			if (pair == NULL || pair == sc ||
(gdb) p pair
$7 = (struct syscall *) 0x1083c50
(gdb) p pair->name
$8 = 0x81478e "accept4"
(gdb) n
3877			    pair->bpf_prog.sys_enter == trace->skel->progs.syscall_unaugmented)
(gdb) p i
$9 = 1
(gdb) n
3876			if (pair == NULL || pair == sc ||
(gdb) n
3880			printf("sc=%p\n", sc); fflush(stdout);
(gdb) n
sc=0x1046f10
3881			printf("sc->name=%p\n", sc->name); fflush(stdout);
(gdb) n
sc->name=0x6c66202c786c3830
3882			printf("sc->nr_args=%d, sc->args=%p\n", sc->nr_args, sc->args); fflush(stdout);
(gdb) p sc->nr_args
$10 = 1935635045
(gdb) p sc->args
$11 = (struct tep_format_field *) 0x257830203a6e656c
(gdb) p *sc
$12 = {e_machine = 540697702, id = 807761968, tp_format = 0x657075202c786c38, nr_args = 1935635045, args_size = 1634427759, bpf_prog = {sys_enter = 0x257830203a726464, 
    sys_exit = 0x7075202c786c3830}, is_exit = 101, is_open = 101, nonexistent = 114, use_btf = 95, args = 0x257830203a6e656c, 
  name = 0x6c66202c786c3830 <error: Cannot access memory at address 0x6c66202c786c3830>, fmt = 0x257830203a736761, arg_fmt = 0x786c3830}
(gdb) 

Ok, ran out of time, but if I simple avoid the second loop in:

static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace, int e_machine)


I.e. the one that starts with:

        /*
         * Now lets do a second pass looking for enabled syscalls without
         * an augmenter that have a signature that is a superset of another
         * syscall with an augmenter so that we can auto-reuse it.

This:

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index e0434f7dc67cb988..3664bb512c70cabf 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -3989,6 +3989,8 @@ static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace, int e_m
                        goto out;
        }
 
+       return 0;
+
        /*
         * Now lets do a second pass looking for enabled syscalls without
         * an augmenter that have a signature that is a superset of another
⬢ [acme@toolbox perf-tools-next]$ 


Then all works, we don't reuse any BPF program, but then that is an
heuristic anyway, that is tried becuase landlock_add_rule has a pointer
argument:

root@number:~# perf trace -e landlock_add_rule perf test -w landlock
     0.000 ( 0.003 ms): perf/71034 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_PATH_BENEATH, rule_attr: 0x7fff6f2bb550, flags: 45) = -1 EINVAL (Invalid argument)
     0.004 ( 0.001 ms): perf/71034 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_NET_PORT, rule_attr: 0x7fff6f2bb540, flags: 45) = -1 EINVAL (Invalid argument)
root@number:~# perf test enum
105: perf trace enum augmentation tests                              : Ok
root@number:~#

So its some sort of syncronization on the various new tables, sorted by
name, etc that then when iterating over the syscalls ends up using a sc
that is not initialized.

- Arnaldo

Re: [PATCH v5 00/11] perf: Support multiple system call tables in the build

[Namhyung Kim]

On Fri, Mar 14, 2025 at 05:48:12PM -0300, Arnaldo Carvalho de Melo wrote:
> On Fri, Mar 14, 2025 at 02:26:41PM -0300, Arnaldo Carvalho de Melo wrote:
> > it finds the pair, but then its sc->args has a bogus pointer... I'll see
> > where this isn't being initialized...
> 
> Breakpoint 4, trace__find_usable_bpf_prog_entry (trace=0x7fffffffa510, sc=0x1046f10) at builtin-trace.c:3874
> 3874			bool is_candidate = false;
> (gdb) n
> 3876			if (pair == NULL || pair == sc ||
> (gdb) p pair
> $7 = (struct syscall *) 0x1083c50
> (gdb) p pair->name
> $8 = 0x81478e "accept4"
> (gdb) n
> 3877			    pair->bpf_prog.sys_enter == trace->skel->progs.syscall_unaugmented)
> (gdb) p i
> $9 = 1
> (gdb) n
> 3876			if (pair == NULL || pair == sc ||
> (gdb) n
> 3880			printf("sc=%p\n", sc); fflush(stdout);
> (gdb) n
> sc=0x1046f10
> 3881			printf("sc->name=%p\n", sc->name); fflush(stdout);
> (gdb) n
> sc->name=0x6c66202c786c3830
> 3882			printf("sc->nr_args=%d, sc->args=%p\n", sc->nr_args, sc->args); fflush(stdout);
> (gdb) p sc->nr_args
> $10 = 1935635045
> (gdb) p sc->args
> $11 = (struct tep_format_field *) 0x257830203a6e656c
> (gdb) p *sc
> $12 = {e_machine = 540697702, id = 807761968, tp_format = 0x657075202c786c38, nr_args = 1935635045, args_size = 1634427759, bpf_prog = {sys_enter = 0x257830203a726464, 
>     sys_exit = 0x7075202c786c3830}, is_exit = 101, is_open = 101, nonexistent = 114, use_btf = 95, args = 0x257830203a6e656c, 
>   name = 0x6c66202c786c3830 <error: Cannot access memory at address 0x6c66202c786c3830>, fmt = 0x257830203a736761, arg_fmt = 0x786c3830}
> (gdb) 
> 
> Ok, ran out of time, but if I simple avoid the second loop in:
> 
> static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace, int e_machine)
> 
> 
> I.e. the one that starts with:
> 
>         /*
>          * Now lets do a second pass looking for enabled syscalls without
>          * an augmenter that have a signature that is a superset of another
>          * syscall with an augmenter so that we can auto-reuse it.
> 
> This:
> 
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index e0434f7dc67cb988..3664bb512c70cabf 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -3989,6 +3989,8 @@ static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace, int e_m
>                         goto out;
>         }
>  
> +       return 0;
> +
>         /*
>          * Now lets do a second pass looking for enabled syscalls without
>          * an augmenter that have a signature that is a superset of another
> ⬢ [acme@toolbox perf-tools-next]$ 
> 
> 
> Then all works, we don't reuse any BPF program, but then that is an
> heuristic anyway, that is tried becuase landlock_add_rule has a pointer
> argument:
> 
> root@number:~# perf trace -e landlock_add_rule perf test -w landlock
>      0.000 ( 0.003 ms): perf/71034 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_PATH_BENEATH, rule_attr: 0x7fff6f2bb550, flags: 45) = -1 EINVAL (Invalid argument)
>      0.004 ( 0.001 ms): perf/71034 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_NET_PORT, rule_attr: 0x7fff6f2bb540, flags: 45) = -1 EINVAL (Invalid argument)
> root@number:~# perf test enum
> 105: perf trace enum augmentation tests                              : Ok
> root@number:~#
> 
> So its some sort of syncronization on the various new tables, sorted by
> name, etc that then when iterating over the syscalls ends up using a sc
> that is not initialized.

Right, I've realized that calling trace__syscall_info() can invalidate
the existing sc since it calls trace__find_syscall() which reallocates
and resorts the syscall table.  That's why it was ok when no filter was
used since it'd allocate the whole table in the first pass.  Otherwise
it looks for a pair syscall while holding the original sc but calling
the function would invalidate the sc.

What about this (on top of my earlier fix)?

Thanks,
Namhyung


---8<---
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 49199d753b7cafbf..da0ddc713e6b35da 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2506,10 +2506,12 @@ static struct syscall *trace__find_syscall(struct trace *trace, int e_machine, i
 	};
 	struct syscall *sc, *tmp;
 
-	sc = bsearch(&key, trace->syscalls.table, trace->syscalls.table_size,
-		     sizeof(struct syscall), syscall__cmp);
-	if (sc)
-		return sc;
+	if (trace->syscalls.table) {
+		sc = bsearch(&key, trace->syscalls.table, trace->syscalls.table_size,
+			     sizeof(struct syscall), syscall__cmp);
+		if (sc)
+			return sc;
+	}
 
 	tmp = reallocarray(trace->syscalls.table, trace->syscalls.table_size + 1,
 			   sizeof(struct syscall));
@@ -3855,6 +3857,10 @@ static int trace__bpf_sys_enter_beauty_map(struct trace *trace, int e_machine, i
 
 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
 {
+	int orig_id = sc->id;
+	const char *orig_name = sc->name;
+	int e_machine = sc->e_machine;
+	struct tep_format_field *args = sc->args;
 	struct tep_format_field *field, *candidate_field;
 	/*
 	 * We're only interested in syscalls that have a pointer:
@@ -3866,18 +3872,19 @@ static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace
 
 	return NULL;
 
+	/* calling trace__syscall_info() may invalidate 'sc' */
 try_to_find_pair:
-	for (int i = 0, num_idx = syscalltbl__num_idx(sc->e_machine); i < num_idx; ++i) {
-		int id = syscalltbl__id_at_idx(sc->e_machine, i);
-		struct syscall *pair = trace__syscall_info(trace, NULL, sc->e_machine, id);
+	for (int i = 0, num_idx = syscalltbl__num_idx(e_machine); i < num_idx; ++i) {
+		int id = syscalltbl__id_at_idx(e_machine, i);
+		struct syscall *pair = trace__syscall_info(trace, NULL, e_machine, id);
 		struct bpf_program *pair_prog;
 		bool is_candidate = false;
 
-		if (pair == NULL || pair == sc ||
+		if (pair == NULL || pair->id == orig_id ||
 		    pair->bpf_prog.sys_enter == trace->skel->progs.syscall_unaugmented)
 			continue;
 
-		for (field = sc->args, candidate_field = pair->args;
+		for (field = args, candidate_field = pair->args;
 		     field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
 			bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
 			     candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
@@ -3944,7 +3951,7 @@ static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace
 				goto next_candidate;
 		}
 
-		pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
+		pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, orig_name);
 		return pair_prog;
 	next_candidate:
 		continue;
@@ -4041,6 +4048,11 @@ static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace, int e_m
 		if (pair_prog == NULL)
 			continue;
 
+		/*
+		 * Get syscall info again as find usable entry above might
+		 * modify the syscall table and shuffle it.
+		 */
+		sc = trace__syscall_info(trace, NULL, e_machine, key);
 		sc->bpf_prog.sys_enter = pair_prog;
 
 		/*

Re: [PATCH v5 00/11] perf: Support multiple system call tables in the build

[Ian Rogers]

On Sat, Mar 15, 2025 at 4:02 PM Namhyung Kim <namhyung@kernel.org> wrote:
>
> On Fri, Mar 14, 2025 at 05:48:12PM -0300, Arnaldo Carvalho de Melo wrote:
> > On Fri, Mar 14, 2025 at 02:26:41PM -0300, Arnaldo Carvalho de Melo wrote:
> > > it finds the pair, but then its sc->args has a bogus pointer... I'll see
> > > where this isn't being initialized...
> >
> > Breakpoint 4, trace__find_usable_bpf_prog_entry (trace=0x7fffffffa510, sc=0x1046f10) at builtin-trace.c:3874
> > 3874                  bool is_candidate = false;
> > (gdb) n
> > 3876                  if (pair == NULL || pair == sc ||
> > (gdb) p pair
> > $7 = (struct syscall *) 0x1083c50
> > (gdb) p pair->name
> > $8 = 0x81478e "accept4"
> > (gdb) n
> > 3877                      pair->bpf_prog.sys_enter == trace->skel->progs.syscall_unaugmented)
> > (gdb) p i
> > $9 = 1
> > (gdb) n
> > 3876                  if (pair == NULL || pair == sc ||
> > (gdb) n
> > 3880                  printf("sc=%p\n", sc); fflush(stdout);
> > (gdb) n
> > sc=0x1046f10
> > 3881                  printf("sc->name=%p\n", sc->name); fflush(stdout);
> > (gdb) n
> > sc->name=0x6c66202c786c3830
> > 3882                  printf("sc->nr_args=%d, sc->args=%p\n", sc->nr_args, sc->args); fflush(stdout);
> > (gdb) p sc->nr_args
> > $10 = 1935635045
> > (gdb) p sc->args
> > $11 = (struct tep_format_field *) 0x257830203a6e656c
> > (gdb) p *sc
> > $12 = {e_machine = 540697702, id = 807761968, tp_format = 0x657075202c786c38, nr_args = 1935635045, args_size = 1634427759, bpf_prog = {sys_enter = 0x257830203a726464,
> >     sys_exit = 0x7075202c786c3830}, is_exit = 101, is_open = 101, nonexistent = 114, use_btf = 95, args = 0x257830203a6e656c,
> >   name = 0x6c66202c786c3830 <error: Cannot access memory at address 0x6c66202c786c3830>, fmt = 0x257830203a736761, arg_fmt = 0x786c3830}
> > (gdb)
> >
> > Ok, ran out of time, but if I simple avoid the second loop in:
> >
> > static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace, int e_machine)
> >
> >
> > I.e. the one that starts with:
> >
> >         /*
> >          * Now lets do a second pass looking for enabled syscalls without
> >          * an augmenter that have a signature that is a superset of another
> >          * syscall with an augmenter so that we can auto-reuse it.
> >
> > This:
> >
> > diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> > index e0434f7dc67cb988..3664bb512c70cabf 100644
> > --- a/tools/perf/builtin-trace.c
> > +++ b/tools/perf/builtin-trace.c
> > @@ -3989,6 +3989,8 @@ static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace, int e_m
> >                         goto out;
> >         }
> >
> > +       return 0;
> > +
> >         /*
> >          * Now lets do a second pass looking for enabled syscalls without
> >          * an augmenter that have a signature that is a superset of another
> > ⬢ [acme@toolbox perf-tools-next]$
> >
> >
> > Then all works, we don't reuse any BPF program, but then that is an
> > heuristic anyway, that is tried becuase landlock_add_rule has a pointer
> > argument:
> >
> > root@number:~# perf trace -e landlock_add_rule perf test -w landlock
> >      0.000 ( 0.003 ms): perf/71034 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_PATH_BENEATH, rule_attr: 0x7fff6f2bb550, flags: 45) = -1 EINVAL (Invalid argument)
> >      0.004 ( 0.001 ms): perf/71034 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_NET_PORT, rule_attr: 0x7fff6f2bb540, flags: 45) = -1 EINVAL (Invalid argument)
> > root@number:~# perf test enum
> > 105: perf trace enum augmentation tests                              : Ok
> > root@number:~#
> >
> > So its some sort of syncronization on the various new tables, sorted by
> > name, etc that then when iterating over the syscalls ends up using a sc
> > that is not initialized.
>
> Right, I've realized that calling trace__syscall_info() can invalidate
> the existing sc since it calls trace__find_syscall() which reallocates
> and resorts the syscall table.  That's why it was ok when no filter was
> used since it'd allocate the whole table in the first pass.  Otherwise
> it looks for a pair syscall while holding the original sc but calling
> the function would invalidate the sc.
>
> What about this (on top of my earlier fix)?

LGTM.
Reviewed-by: Ian Rogers <irogers@google.com>

Thanks,
Ian

> Thanks,
> Namhyung
>
>
> ---8<---
> diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
> index 49199d753b7cafbf..da0ddc713e6b35da 100644
> --- a/tools/perf/builtin-trace.c
> +++ b/tools/perf/builtin-trace.c
> @@ -2506,10 +2506,12 @@ static struct syscall *trace__find_syscall(struct trace *trace, int e_machine, i
>         };
>         struct syscall *sc, *tmp;
>
> -       sc = bsearch(&key, trace->syscalls.table, trace->syscalls.table_size,
> -                    sizeof(struct syscall), syscall__cmp);
> -       if (sc)
> -               return sc;
> +       if (trace->syscalls.table) {
> +               sc = bsearch(&key, trace->syscalls.table, trace->syscalls.table_size,
> +                            sizeof(struct syscall), syscall__cmp);
> +               if (sc)
> +                       return sc;
> +       }
>
>         tmp = reallocarray(trace->syscalls.table, trace->syscalls.table_size + 1,
>                            sizeof(struct syscall));
> @@ -3855,6 +3857,10 @@ static int trace__bpf_sys_enter_beauty_map(struct trace *trace, int e_machine, i
>
>  static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc)
>  {
> +       int orig_id = sc->id;
> +       const char *orig_name = sc->name;
> +       int e_machine = sc->e_machine;
> +       struct tep_format_field *args = sc->args;
>         struct tep_format_field *field, *candidate_field;
>         /*
>          * We're only interested in syscalls that have a pointer:
> @@ -3866,18 +3872,19 @@ static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace
>
>         return NULL;
>
> +       /* calling trace__syscall_info() may invalidate 'sc' */
>  try_to_find_pair:
> -       for (int i = 0, num_idx = syscalltbl__num_idx(sc->e_machine); i < num_idx; ++i) {
> -               int id = syscalltbl__id_at_idx(sc->e_machine, i);
> -               struct syscall *pair = trace__syscall_info(trace, NULL, sc->e_machine, id);
> +       for (int i = 0, num_idx = syscalltbl__num_idx(e_machine); i < num_idx; ++i) {
> +               int id = syscalltbl__id_at_idx(e_machine, i);
> +               struct syscall *pair = trace__syscall_info(trace, NULL, e_machine, id);
>                 struct bpf_program *pair_prog;
>                 bool is_candidate = false;
>
> -               if (pair == NULL || pair == sc ||
> +               if (pair == NULL || pair->id == orig_id ||
>                     pair->bpf_prog.sys_enter == trace->skel->progs.syscall_unaugmented)
>                         continue;
>
> -               for (field = sc->args, candidate_field = pair->args;
> +               for (field = args, candidate_field = pair->args;
>                      field && candidate_field; field = field->next, candidate_field = candidate_field->next) {
>                         bool is_pointer = field->flags & TEP_FIELD_IS_POINTER,
>                              candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER;
> @@ -3944,7 +3951,7 @@ static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace
>                                 goto next_candidate;
>                 }
>
> -               pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name);
> +               pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, orig_name);
>                 return pair_prog;
>         next_candidate:
>                 continue;
> @@ -4041,6 +4048,11 @@ static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace, int e_m
>                 if (pair_prog == NULL)
>                         continue;
>
> +               /*
> +                * Get syscall info again as find usable entry above might
> +                * modify the syscall table and shuffle it.
> +                */
> +               sc = trace__syscall_info(trace, NULL, e_machine, key);
>                 sc->bpf_prog.sys_enter = pair_prog;
>
>                 /*
>

Re: [PATCH v5 00/11] perf: Support multiple system call tables in the build

[Arnaldo Carvalho de Melo]

On Fri, Mar 14, 2025 at 02:10:54PM -0300, Arnaldo Carvalho de Melo wrote:
> On Thu, Mar 13, 2025 at 10:45:49PM -0700, Namhyung Kim wrote:
> > On Thu, Mar 13, 2025 at 05:47:27PM -0300, Arnaldo Carvalho de Melo wrote:
> > > On Thu, Mar 13, 2025 at 05:20:09PM -0300, Arnaldo Carvalho de Melo wrote:
> > > > Still building, but noticed this on x86_64:
> > > > 
> > > > 105: perf trace enum augmentation tests                              : FAILED!
> > > > 106: perf trace BTF general tests                                    : FAILED!
> > > > 107: perf trace exit race                                            : Ok
> > > > 108: perf trace record and replay                                    : FAILED!
> > > > 
> > > > 
> > > > The first doesn´t help that much with verbose mode, haven't checked if
> > > > before this series it was failing :-\
> > > > 
> > > > root@x1:~# perf test -vvv 105
> > > > 105: perf trace enum augmentation tests:
> > > > --- start ---
> > > > test child forked, pid 19411
> > > > Checking if vmlinux exists
> > > > Tracing syscall landlock_add_rule
> > > > ---- end(-1) ----
> > > > 105: perf trace enum augmentation tests                              : FAILED!
> > > > root@x1:~#

This one is now ok:

     0.004 ( 0.000 ms): perf/200342 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_NET_PORT, rule_attr: 0x7ffd649bd0d0, flags: 45) = -1 EINVAL (Invalid argument)
root@number:~# perf test enum
105: perf trace enum augmentation tests                              : Ok
root@number:~#

now looking at:

root@number:~# perf test -vvvvvvvvv 106
106: perf trace BTF general tests:
--- start ---
test child forked, pid 200467
Checking if vmlinux BTF exists
Testing perf trace's string augmentation
String augmentation test failed
---- end(-1) ----
106: perf trace BTF general tests                                    : FAILED!
root@number:~#

No clue from the test, reading its source code now to see where it is
failing to try and reproduce the problem.

- Arnaldo

Re: [PATCH v5 00/11] perf: Support multiple system call tables in the build

[Arnaldo Carvalho de Melo]

On Mon, Mar 17, 2025 at 05:48:10PM -0300, Arnaldo Carvalho de Melo wrote:
> On Fri, Mar 14, 2025 at 02:10:54PM -0300, Arnaldo Carvalho de Melo wrote:
> > On Thu, Mar 13, 2025 at 10:45:49PM -0700, Namhyung Kim wrote:
> > > On Thu, Mar 13, 2025 at 05:47:27PM -0300, Arnaldo Carvalho de Melo wrote:
> > > > On Thu, Mar 13, 2025 at 05:20:09PM -0300, Arnaldo Carvalho de Melo wrote:
> > > > > Still building, but noticed this on x86_64:
> > > > > 
> > > > > 105: perf trace enum augmentation tests                              : FAILED!
> > > > > 106: perf trace BTF general tests                                    : FAILED!
> > > > > 107: perf trace exit race                                            : Ok
> > > > > 108: perf trace record and replay                                    : FAILED!
> > > > > 
> > > > > 
> > > > > The first doesn´t help that much with verbose mode, haven't checked if
> > > > > before this series it was failing :-\
> > > > > 
> > > > > root@x1:~# perf test -vvv 105
> > > > > 105: perf trace enum augmentation tests:
> > > > > --- start ---
> > > > > test child forked, pid 19411
> > > > > Checking if vmlinux exists
> > > > > Tracing syscall landlock_add_rule
> > > > > ---- end(-1) ----
> > > > > 105: perf trace enum augmentation tests                              : FAILED!
> > > > > root@x1:~#
 
> This one is now ok:
 
>      0.004 ( 0.000 ms): perf/200342 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_NET_PORT, rule_attr: 0x7ffd649bd0d0, flags: 45) = -1 EINVAL (Invalid argument)
> root@number:~# perf test enum
> 105: perf trace enum augmentation tests                              : Ok
> root@number:~#
 
> now looking at:
 
> root@number:~# perf test -vvvvvvvvv 106
> 106: perf trace BTF general tests:
> --- start ---
> test child forked, pid 200467
> Checking if vmlinux BTF exists
> Testing perf trace's string augmentation
> String augmentation test failed
> ---- end(-1) ----
> 106: perf trace BTF general tests                                    : FAILED!
> root@number:~#
 
> No clue from the test, reading its source code now to see where it is
> failing to try and reproduce the problem.

root@number:~# rm -f /tmp/1234567 ; touch /tmp/1234567 ; perf trace -e renameat* --max-events=1 -- mv /tmp/1234567 /tmp/abcdefg
         ? (         ): mv/200698  ... [continued]: renameat2())                                        = -1 EEXIST (File exists)
root@number:~# 

At this point it works:

⬢ [acme@toolbox perf-tools-next]$ git log -1
commit 58f4f294b358861adaee68dfd19da1060058ec27 (HEAD)
Author: James Clark <james.clark@linaro.org>
Date:   Mon Jan 6 16:42:58 2025 +0000

    perf test trace_btf_general: Fix shellcheck warning


root@number:~# rm -f /tmp/1234567 ; touch /tmp/1234567 ; perf trace -e renameat* --max-events=1 -- mv /tmp/1234567 /tmp/abcdefg
     0.000 ( 0.006 ms): mv/218282 renameat2(olddfd: CWD, oldname: "/tmp/1234567", newdfd: CWD, newname: "/tmp/abcdefg", flags: NOREPLACE) = -1 EEXIST (File exists)
root@number:~#

Seems like some transient problem on this test machine, didn't manage to
bisect and now everything seems to work:

Well, not always :-\

root@number:~# perf test 105 106 107 108 
105: perf trace enum augmentation tests                              : Ok
106: perf trace BTF general tests                                    : Ok
107: perf trace exit race                                            : Ok
108: perf trace record and replay                                    : Ok
root@number:~# perf test 105 106 107 108 
105: perf trace enum augmentation tests                              : Ok
106: perf trace BTF general tests                                    : Ok
107: perf trace exit race                                            : Ok
108: perf trace record and replay                                    : Ok
root@number:~# perf test 105 106 107 108 
105: perf trace enum augmentation tests                              : FAILED!
106: perf trace BTF general tests                                    : FAILED!
107: perf trace exit race                                            : Ok
108: perf trace record and replay                                    : Ok
root@number:~# perf test 105 106 107 108 
105: perf trace enum augmentation tests                              : FAILED!
106: perf trace BTF general tests                                    : FAILED!
107: perf trace exit race                                            : Ok
108: perf trace record and replay                                    : Ok
root@number:~# perf test 105 106 107 108 
105: perf trace enum augmentation tests                              : FAILED!
106: perf trace BTF general tests                                    : FAILED!
107: perf trace exit race                                            : Ok
108: perf trace record and replay                                    : Ok
root@number:~# perf test 105 106 107 108 
105: perf trace enum augmentation tests                              : FAILED!
106: perf trace BTF general tests                                    : FAILED!
107: perf trace exit race                                            : Ok
108: perf trace record and replay                                    : Ok
root@number:~# perf test 105 106 107 108 
105: perf trace enum augmentation tests                              : Ok
106: perf trace BTF general tests                                    : FAILED!
107: perf trace exit race                                            : Ok
108: perf trace record and replay                                    : Ok
root@number:~# for test in 105 106 107 108 ; do perf test $test ; done
105: perf trace enum augmentation tests                              : FAILED!
106: perf trace BTF general tests                                    : FAILED!
107: perf trace exit race                                            : Ok
108: perf trace record and replay                                    : Ok
root@number:~# for test in 105 106 107 108 ; do perf test $test ; done
105: perf trace enum augmentation tests                              : FAILED!
106: perf trace BTF general tests                                    : FAILED!
107: perf trace exit race                                            : Ok
108: perf trace record and replay                                    : Ok
root@number:~#

So, overall, I think this should land and we should continue trying to
figure out how to find out about the above failure cases, probably the
perf trace cases, since they do set up BPF programs, etc should be done
serially?

Doesn't seem to be the case:

root@number:~# for test in 105 106 107 108 ; do perf test --sequential $test ; done
105: perf trace enum augmentation tests                              : FAILED!
106: perf trace BTF general tests                                    : Ok
107: perf trace exit race                                            : Ok
108: perf trace record and replay                                    : Ok
root@number:~# for test in 105 106 107 108 ; do perf test --sequential $test ; done
105: perf trace enum augmentation tests                              : FAILED!
106: perf trace BTF general tests                                    : Ok
107: perf trace exit race                                            : Ok
108: perf trace record and replay                                    : Ok
root@number:~# perf test --sequential 105 106 107 108
105: perf trace enum augmentation tests                              : FAILED!
106: perf trace BTF general tests                                    : Ok
107: perf trace exit race                                            : Ok
108: perf trace record and replay                                    : Ok
root@number:~# 

But then if that is the case it needs some love and care to deal with
other BPF users in the system, being more graceful in the face of
errors.

- Arnaldo