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| author | Ian Rogers <irogers@google.com> | 2023-10-25 00:23:07 +0200 |
|---|---|---|
| committer | Namhyung Kim <namhyung@kernel.org> | 2023-10-25 22:37:22 +0200 |
| commit | 78c32f4cb12f9430e29402118635dcf972b7d325 (patch) | |
| tree | cb7dfd433eb0341dff198952f969daff3f5d6d1d /tools/lib | |
| parent | libperf rc_check: Make implicit enabling work for GCC (diff) | |
| download | linux-78c32f4cb12f9430e29402118635dcf972b7d325.tar.xz linux-78c32f4cb12f9430e29402118635dcf972b7d325.zip | |
libperf rc_check: Add RC_CHK_EQUAL
Comparing pointers with reference count checking is tricky to avoid a
SEGV. Add a convenience macro to simplify and use.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: liuwenyu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Song Liu <song@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231024222353.3024098-5-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/perf/include/internal/rc_check.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/lib/perf/include/internal/rc_check.h b/tools/lib/perf/include/internal/rc_check.h index e88a6d8a0b0f..f80ddfc80129 100644 --- a/tools/lib/perf/include/internal/rc_check.h +++ b/tools/lib/perf/include/internal/rc_check.h @@ -54,6 +54,9 @@ /* A put operation removing the indirection layer. */ #define RC_CHK_PUT(object) {} +/* Pointer equality when the indirection may or may not be there. */ +#define RC_CHK_EQUAL(object1, object2) (object1 == object2) + #else /* Replaces "struct foo" so that the pointer may be interposed. */ @@ -101,6 +104,10 @@ } \ } while(0) +/* Pointer equality when the indirection may or may not be there. */ +#define RC_CHK_EQUAL(object1, object2) (object1 == object2 || \ + (object1 && object2 && object1->orig == object2->orig)) + #endif #endif /* __LIBPERF_INTERNAL_RC_CHECK_H */ |