[PATCH v7 14/14] perf callchain: Support aarch64 cross-platform

He Kuang
2016-05-31T11:19:58Z

Support aarch64 cross platform callchain unwind.

Signed-off-by: He Kuang <hekuang@huawei.com>
---
tools/perf/arch/arm64/util/unwind-libunwind.c | 4 +++-
tools/perf/config/Makefile | 12 ++++++++++++
tools/perf/util/Build | 1 +
tools/perf/util/libunwind/arm64.c | 18 ++++++++++++++++++
tools/perf/util/unwind-libunwind.c | 7 ++++++-
5 files changed, 40 insertions(+), 2 deletions(-)
create mode 100644 tools/perf/util/libunwind/arm64.c

diff --git a/tools/perf/arch/arm64/util/unwind-libunwind.c b/tools/perf/arch/arm64/util/unwind-libunwind.c
index a87afa9..c116b71 100644
--- a/tools/perf/arch/arm64/util/unwind-libunwind.c
+++ b/tools/perf/arch/arm64/util/unwind-libunwind.c
@@ -1,11 +1,13 @@

+#ifndef REMOTE_UNWIND_LIBUNWIND
#include <errno.h>
#include <libunwind.h>
#include "perf_regs.h"
#include "../../util/unwind.h"
#include "../../util/debug.h"
+#endif

-int libunwind__arch_reg_id(int regnum)
+int LIBUNWIND__ARCH_REG_ID(int regnum)
{
switch (regnum) {
case UNW_AARCH64_X0:
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index b8d8a77..00bd141 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -362,6 +362,18 @@ ifndef NO_LIBUNWIND
have_libunwind = 1
endif

+ ifeq ($(feature-libunwind-aarch64), 1)
+ $(call detected,CONFIG_LIBUNWIND_AARCH64)
+ CFLAGS += -DHAVE_LIBUNWIND_AARCH64_SUPPORT
+ LDFLAGS += -lunwind-aarch64
+ have_libunwind = 1
+ $(call feature_check,libunwind-debug-frame-aarch64)
+ ifneq ($(feature-libunwind-debug-frame-aarch64), 1)
+ msg := $(warning No debug_frame support found in libunwind-aarch64);
+ CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME_AARCH64
+ endif
+ endif
+
ifneq ($(feature-libunwind), 1)
msg := $(warning No libunwind found. Please install libunwind-dev[el] >= 1.1 and/or set LIBUNWIND_DIR);
NO_LOCAL_LIBUNWIND := 1
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index 7746e09..fced833 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -102,6 +102,7 @@ libperf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
libperf-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind-local.o
libperf-$(CONFIG_LIBUNWIND) += unwind-libunwind.o
libperf-$(CONFIG_LIBUNWIND_X86) += libunwind/x86_32.o
+libperf-$(CONFIG_LIBUNWIND_AARCH64) += libunwind/arm64.o

libperf-$(CONFIG_LIBBABELTRACE) += data-convert-bt.o

diff --git a/tools/perf/util/libunwind/arm64.c b/tools/perf/util/libunwind/arm64.c
new file mode 100644
index 0000000..99c0d42
--- /dev/null
+++ b/tools/perf/util/libunwind/arm64.c
@@ -0,0 +1,18 @@
+#define REMOTE_UNWIND_LIBUNWIND
+
+#define LIBUNWIND__ARCH_REG_ID libunwind__arm64_reg_id
+
+#include "unwind.h"
+#include "debug.h"
+#include "libunwind-aarch64.h"
+#include <../../../../arch/arm64/include/uapi/asm/perf_regs.h>
+#include "../../arch/arm64/util/unwind-libunwind.c"
+
+#undef NO_LIBUNWIND_DEBUG_FRAME
+#ifdef NO_LIBUNWIND_DEBUG_FRAME_AARCH64
+#define NO_LIBUNWIND_DEBUG_FRAME
+#endif
+#include "util/unwind-libunwind-local.c"
+
+struct unwind_libunwind_ops *
+arm64_unwind_libunwind_ops = &_unwind_libunwind_ops;
diff --git a/tools/perf/util/unwind-libunwind.c b/tools/perf/util/unwind-libunwind.c
index 5774317..b5f6ca2 100644
--- a/tools/perf/util/unwind-libunwind.c
+++ b/tools/perf/util/unwind-libunwind.c
@@ -6,6 +6,7 @@

struct unwind_libunwind_ops __weak *local_unwind_libunwind_ops;
struct unwind_libunwind_ops __weak *x86_32_unwind_libunwind_ops;
+struct unwind_libunwind_ops __weak *arm64_unwind_libunwind_ops;

void unwind__register_ops(struct thread *thread,
struct unwind_libunwind_ops *ops)
@@ -32,9 +33,13 @@ int unwind__prepare_access(struct thread *thread, struct map *map)

arch = normalize_arch(thread->mg->machine->env->arch);

- if (!strcmp(arch, "x86"))
+ if (!strcmp(arch, "x86")) {
if (dso_type != DSO__TYPE_64BIT)
ops = x86_32_unwind_libunwind_ops;
+ } else if (!strcmp(arch, "arm64") || !strcmp(arch, "arm")) {
+ if (dso_type == DSO__TYPE_64BIT)
+ ops = arm64_unwind_libunwind_ops;
+ }

if (!ops)
pr_err("unwind: target platform=%s is not supported\n", arch);
--
1.8.5.2