* [PATCH v2] perf jit: Fix a few memory leaks
@ 2023-04-03 20:35 Ian Rogers
2023-04-03 21:50 ` Arnaldo Carvalho de Melo
0 siblings, 1 reply; 2+ messages in thread
From: Ian Rogers @ 2023-04-03 20:35 UTC (permalink / raw)
To: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
Ian Rogers, Adrian Hunter, Brian Robbins, Yuan Can,
linux-perf-users, linux-kernel
As reported by leak sanitizer.
Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/util/genelf_debug.c | 45 +++++++++++++++++++++-------------
tools/perf/util/jitdump.c | 7 +++++-
2 files changed, 34 insertions(+), 18 deletions(-)
diff --git a/tools/perf/util/genelf_debug.c b/tools/perf/util/genelf_debug.c
index dd40683bd4c0..8786c366566e 100644
--- a/tools/perf/util/genelf_debug.c
+++ b/tools/perf/util/genelf_debug.c
@@ -87,6 +87,12 @@ buffer_ext_init(struct buffer_ext *be)
be->max_sz = 0;
}
+static void
+buffer_ext_exit(struct buffer_ext *be)
+{
+ free(be->data);
+}
+
static inline size_t
buffer_ext_size(struct buffer_ext *be)
{
@@ -487,28 +493,28 @@ jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries
Elf_Scn *scn;
Elf_Shdr *shdr;
struct buffer_ext dl, di, da;
- int ret;
+ int ret = -1;
buffer_ext_init(&dl);
buffer_ext_init(&di);
buffer_ext_init(&da);
- ret = jit_process_debug_info(code_addr, debug, nr_debug_entries, &dl, &da, &di);
- if (ret)
- return -1;
+ if (jit_process_debug_info(code_addr, debug, nr_debug_entries, &dl, &da, &di))
+ goto out;
+
/*
* setup .debug_line section
*/
scn = elf_newscn(e);
if (!scn) {
warnx("cannot create section");
- return -1;
+ goto out;
}
d = elf_newdata(scn);
if (!d) {
warnx("cannot get new data");
- return -1;
+ goto out;
}
d->d_align = 1;
@@ -521,7 +527,7 @@ jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries
shdr = elf_getshdr(scn);
if (!shdr) {
warnx("cannot get section header");
- return -1;
+ goto out;
}
shdr->sh_name = 52; /* .debug_line */
@@ -536,13 +542,13 @@ jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries
scn = elf_newscn(e);
if (!scn) {
warnx("cannot create section");
- return -1;
+ goto out;
}
d = elf_newdata(scn);
if (!d) {
warnx("cannot get new data");
- return -1;
+ goto out;
}
d->d_align = 1;
@@ -555,7 +561,7 @@ jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries
shdr = elf_getshdr(scn);
if (!shdr) {
warnx("cannot get section header");
- return -1;
+ goto out;
}
shdr->sh_name = 64; /* .debug_info */
@@ -570,13 +576,13 @@ jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries
scn = elf_newscn(e);
if (!scn) {
warnx("cannot create section");
- return -1;
+ goto out;
}
d = elf_newdata(scn);
if (!d) {
warnx("cannot get new data");
- return -1;
+ goto out;
}
d->d_align = 1;
@@ -589,7 +595,7 @@ jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries
shdr = elf_getshdr(scn);
if (!shdr) {
warnx("cannot get section header");
- return -1;
+ goto out;
}
shdr->sh_name = 76; /* .debug_info */
@@ -601,9 +607,14 @@ jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries
/*
* now we update the ELF image with all the sections
*/
- if (elf_update(e, ELF_C_WRITE) < 0) {
+ if (elf_update(e, ELF_C_WRITE) < 0)
warnx("elf_update debug failed");
- return -1;
- }
- return 0;
+ else
+ ret = 0;
+
+out:
+ buffer_ext_exit(&dl);
+ buffer_ext_exit(&di);
+ buffer_ext_exit(&da);
+ return ret;
}
diff --git a/tools/perf/util/jitdump.c b/tools/perf/util/jitdump.c
index 0e033278fa12..28e49502db5e 100644
--- a/tools/perf/util/jitdump.c
+++ b/tools/perf/util/jitdump.c
@@ -235,9 +235,11 @@ jit_open(struct jit_buf_desc *jd, const char *name)
*/
strcpy(jd->dir, name);
dirname(jd->dir);
+ free(buf);
return 0;
error:
+ free(buf);
funlockfile(jd->in);
fclose(jd->in);
return retval;
@@ -523,7 +525,7 @@ static int jit_repipe_code_load(struct jit_buf_desc *jd, union jr_entry *jr)
ret = perf_event__process_mmap2(tool, event, &sample, jd->machine);
if (ret)
- return ret;
+ goto out;
ret = jit_inject_event(jd, event);
/*
@@ -532,6 +534,8 @@ static int jit_repipe_code_load(struct jit_buf_desc *jd, union jr_entry *jr)
if (!ret)
build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine);
+out:
+ free(event);
return ret;
}
@@ -874,6 +878,7 @@ jit_process(struct perf_session *session,
}
nsinfo__put(jd.nsi);
+ free(jd.buf);
return ret;
}
--
2.40.0.348.gf938b09366-goog
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2] perf jit: Fix a few memory leaks
2023-04-03 20:35 [PATCH v2] perf jit: Fix a few memory leaks Ian Rogers
@ 2023-04-03 21:50 ` Arnaldo Carvalho de Melo
0 siblings, 0 replies; 2+ messages in thread
From: Arnaldo Carvalho de Melo @ 2023-04-03 21:50 UTC (permalink / raw)
To: Ian Rogers
Cc: Peter Zijlstra, Ingo Molnar, Mark Rutland, Alexander Shishkin,
Jiri Olsa, Namhyung Kim, Adrian Hunter, Brian Robbins, Yuan Can,
linux-perf-users, linux-kernel
Em Mon, Apr 03, 2023 at 01:35:45PM -0700, Ian Rogers escreveu:
> As reported by leak sanitizer.
Thanks, applied.
- Arnaldo
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
> tools/perf/util/genelf_debug.c | 45 +++++++++++++++++++++-------------
> tools/perf/util/jitdump.c | 7 +++++-
> 2 files changed, 34 insertions(+), 18 deletions(-)
>
> diff --git a/tools/perf/util/genelf_debug.c b/tools/perf/util/genelf_debug.c
> index dd40683bd4c0..8786c366566e 100644
> --- a/tools/perf/util/genelf_debug.c
> +++ b/tools/perf/util/genelf_debug.c
> @@ -87,6 +87,12 @@ buffer_ext_init(struct buffer_ext *be)
> be->max_sz = 0;
> }
>
> +static void
> +buffer_ext_exit(struct buffer_ext *be)
> +{
> + free(be->data);
> +}
> +
> static inline size_t
> buffer_ext_size(struct buffer_ext *be)
> {
> @@ -487,28 +493,28 @@ jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries
> Elf_Scn *scn;
> Elf_Shdr *shdr;
> struct buffer_ext dl, di, da;
> - int ret;
> + int ret = -1;
>
> buffer_ext_init(&dl);
> buffer_ext_init(&di);
> buffer_ext_init(&da);
>
> - ret = jit_process_debug_info(code_addr, debug, nr_debug_entries, &dl, &da, &di);
> - if (ret)
> - return -1;
> + if (jit_process_debug_info(code_addr, debug, nr_debug_entries, &dl, &da, &di))
> + goto out;
> +
> /*
> * setup .debug_line section
> */
> scn = elf_newscn(e);
> if (!scn) {
> warnx("cannot create section");
> - return -1;
> + goto out;
> }
>
> d = elf_newdata(scn);
> if (!d) {
> warnx("cannot get new data");
> - return -1;
> + goto out;
> }
>
> d->d_align = 1;
> @@ -521,7 +527,7 @@ jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries
> shdr = elf_getshdr(scn);
> if (!shdr) {
> warnx("cannot get section header");
> - return -1;
> + goto out;
> }
>
> shdr->sh_name = 52; /* .debug_line */
> @@ -536,13 +542,13 @@ jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries
> scn = elf_newscn(e);
> if (!scn) {
> warnx("cannot create section");
> - return -1;
> + goto out;
> }
>
> d = elf_newdata(scn);
> if (!d) {
> warnx("cannot get new data");
> - return -1;
> + goto out;
> }
>
> d->d_align = 1;
> @@ -555,7 +561,7 @@ jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries
> shdr = elf_getshdr(scn);
> if (!shdr) {
> warnx("cannot get section header");
> - return -1;
> + goto out;
> }
>
> shdr->sh_name = 64; /* .debug_info */
> @@ -570,13 +576,13 @@ jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries
> scn = elf_newscn(e);
> if (!scn) {
> warnx("cannot create section");
> - return -1;
> + goto out;
> }
>
> d = elf_newdata(scn);
> if (!d) {
> warnx("cannot get new data");
> - return -1;
> + goto out;
> }
>
> d->d_align = 1;
> @@ -589,7 +595,7 @@ jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries
> shdr = elf_getshdr(scn);
> if (!shdr) {
> warnx("cannot get section header");
> - return -1;
> + goto out;
> }
>
> shdr->sh_name = 76; /* .debug_info */
> @@ -601,9 +607,14 @@ jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_entries
> /*
> * now we update the ELF image with all the sections
> */
> - if (elf_update(e, ELF_C_WRITE) < 0) {
> + if (elf_update(e, ELF_C_WRITE) < 0)
> warnx("elf_update debug failed");
> - return -1;
> - }
> - return 0;
> + else
> + ret = 0;
> +
> +out:
> + buffer_ext_exit(&dl);
> + buffer_ext_exit(&di);
> + buffer_ext_exit(&da);
> + return ret;
> }
> diff --git a/tools/perf/util/jitdump.c b/tools/perf/util/jitdump.c
> index 0e033278fa12..28e49502db5e 100644
> --- a/tools/perf/util/jitdump.c
> +++ b/tools/perf/util/jitdump.c
> @@ -235,9 +235,11 @@ jit_open(struct jit_buf_desc *jd, const char *name)
> */
> strcpy(jd->dir, name);
> dirname(jd->dir);
> + free(buf);
>
> return 0;
> error:
> + free(buf);
> funlockfile(jd->in);
> fclose(jd->in);
> return retval;
> @@ -523,7 +525,7 @@ static int jit_repipe_code_load(struct jit_buf_desc *jd, union jr_entry *jr)
>
> ret = perf_event__process_mmap2(tool, event, &sample, jd->machine);
> if (ret)
> - return ret;
> + goto out;
>
> ret = jit_inject_event(jd, event);
> /*
> @@ -532,6 +534,8 @@ static int jit_repipe_code_load(struct jit_buf_desc *jd, union jr_entry *jr)
> if (!ret)
> build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine);
>
> +out:
> + free(event);
> return ret;
> }
>
> @@ -874,6 +878,7 @@ jit_process(struct perf_session *session,
> }
>
> nsinfo__put(jd.nsi);
> + free(jd.buf);
>
> return ret;
> }
> --
> 2.40.0.348.gf938b09366-goog
>
--
- Arnaldo
^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-04-03 20:35 [PATCH v2] perf jit: Fix a few memory leaks Ian Rogers
2023-04-03 21:50 ` Arnaldo Carvalho de Melo
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