[PATCH 16/20] perf trace: free syscall->arg_fmt
From: Riccardo Mancini <hidden>
Date: 2021-07-15 16:08:09
Also in:
lkml
Subsystem:
performance events subsystem, the rest · Maintainers:
Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
ASan reports several memory leaks running the perf test "88: Check open filename arg using perf trace + vfs_getname". The second of these leaks is caused by the arg_fmt field of syscall not being deallocated. This patch adds a new function syscall__exit which is called on all syscalls.table entries in trace__exit, which will free the arg_fmt field. Signed-off-by: Riccardo Mancini <redacted> --- tools/perf/builtin-trace.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index fe26d87ca8ccc14d..d67f02d237eb0c7e 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c@@ -2266,6 +2266,14 @@ static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sam return augmented_args; } +static void syscall__exit(struct syscall *sc) +{ + if (!sc) + return; + + free(sc->arg_fmt); +} + static int trace__sys_enter(struct trace *trace, struct evsel *evsel, union perf_event *event __maybe_unused, struct perf_sample *sample)
@@ -4703,9 +4711,15 @@ 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); free(trace->ev_qualifier_ids.entries); - free(trace->syscalls.table); + if (trace->syscalls.table) { + for (i = 0; i <= trace->sctbl->syscalls.max_id; i++) + syscall__exit(&trace->syscalls.table[i]); + free(trace->syscalls.table); + } syscalltbl__delete(trace->sctbl); zfree(&trace->perfconfig_events); }
--
2.31.1