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Changes in v3: - Add trace__btf_scnprintf() helper function - Remove is_enum memeber in struct syscall_arg_fmt, replace it with btf_is_enum() - Add syscall_arg_fmt__cache_btf_enum() to cache btf_type only - Resolve NO_LIBBPF=1 build error - Skip BTF augmentation test if landlock_add_rule syscall and LIBBPF are not available - Rename landlock.c workload, add a comment to landlock.c workload - Change the way of skipping 'enum ' prefix - Add type_name member to struct syscall_arg Changes in v2: - Add trace_btf_enum regression test, and landlock workload v1: In this patch, BTF is used to turn enum value to the corresponding enum variable name. There is only one system call that uses enum value as its argument, that is `landlock_add_rule()`. Enum arguments of non-syscall tracepoints can also be augmented, for instance timer:hrtimer_start and timer:hrtimer_init's 'mode' argument. Arnaldo Carvalho de Melo (2): perf trace: Introduce trace__btf_scnprintf() perf trace: Remove arg_fmt->is_enum, we can get that from the BTF type Howard Chu (6): perf trace: Fix iteration of syscall ids in syscalltbl->entries perf trace: BTF-based enum pretty printing for syscall args perf trace: Augment non-syscall tracepoints with enum arguments with BTF perf trace: Filter enum arguments with enum names perf test: Add landlock workload perf test trace_btf_enum: Add regression test for the BTF augmentation of enums in 'perf trace' tools/perf/builtin-trace.c | 229 ++++++++++++++++++++--- tools/perf/tests/builtin-test.c | 1 + tools/perf/tests/shell/trace_btf_enum.sh | 61 ++++++ tools/perf/tests/tests.h | 1 + tools/perf/tests/workloads/Build | 2 + tools/perf/tests/workloads/landlock.c | 38 ++++ tools/perf/trace/beauty/beauty.h | 1 + tools/perf/util/syscalltbl.c | 7 + tools/perf/util/syscalltbl.h | 1 + 9 files changed, 317 insertions(+), 24 deletions(-) create mode 100755 tools/perf/tests/shell/trace_btf_enum.sh create mode 100644 tools/perf/tests/workloads/landlock.c -- 2.45.2