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author | 2023-06-08 16:28:21 -0700 | |
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committer | 2023-06-12 15:57:54 -0300 | |
commit | 8ab12a2038e36beda4062a8e7562a8cfe9655553 (patch) | |
tree | 684705274cac61b83099a7f8c88a156852c55beb /tools/perf/builtin-c2c.c | |
parent | perf header: Avoid out-of-bounds read (diff) | |
download | linux-8ab12a2038e36beda4062a8e7562a8cfe9655553.tar.gz linux-8ab12a2038e36beda4062a8e7562a8cfe9655553.tar.bz2 linux-8ab12a2038e36beda4062a8e7562a8cfe9655553.zip |
perf callchain: Use pthread keys for tls callchain_cursor
Pthread keys are more portable than __thread and allow the association
of a destructor with the key. Use the destructor to clean up TLS
callchain cursors to aid understanding memory leaks.
Committer notes:
Had to fixup a series of unconverted places and also check for the
return of get_tls_callchain_cursor() as it may fail and return NULL.
In that unlikely case we now either print something to a file, if the
caller was expecting to print a callchain, or return an error code to
state that resolving the callchain isn't possible.
In some cases this was made easier because thread__resolve_callchain()
already can fail for other reasons, so this new one (cursor == NULL) can
be added and the callers don't have to explicitely check for this new
condition.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ali Saidi <alisaidi@amazon.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Brian Robbins <brianrob@linux.microsoft.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: Fangrui Song <maskray@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ivan Babrou <ivan@cloudflare.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jing Zhang <renyu.zj@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Steinar H. Gunderson <sesse@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Wenyu Liu <liuwenyu7@huawei.com>
Cc: Will Deacon <will@kernel.org>
Cc: Yang Jihong <yangjihong1@huawei.com>
Cc: Ye Xingchen <ye.xingchen@zte.com.cn>
Cc: Yuan Can <yuancan@huawei.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230608232823.4027869-25-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-c2c.c')
-rw-r--r-- | tools/perf/builtin-c2c.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c index 530a44a59f41..a4cf9de7a7b5 100644 --- a/tools/perf/builtin-c2c.c +++ b/tools/perf/builtin-c2c.c @@ -284,6 +284,7 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused, struct hist_entry *he; struct addr_location al; struct mem_info *mi, *mi_dup; + struct callchain_cursor *cursor; int ret; addr_location__init(&al); @@ -297,7 +298,8 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused, if (c2c.stitch_lbr) thread__set_lbr_stitch_enable(al.thread, true); - ret = sample__resolve_callchain(sample, &callchain_cursor, NULL, + cursor = get_tls_callchain_cursor(); + ret = sample__resolve_callchain(sample, cursor, NULL, evsel, &al, sysctl_perf_event_max_stack); if (ret) goto out; |