diff options
author | Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> | 2015-11-19 15:04:53 +0900 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-11-19 13:19:19 -0300 |
commit | c4068f51d40df151a661a384ab1309b11d7f012e (patch) | |
tree | 49f5332f3aa16b6eef6089885da532d8ae353e02 /tools/perf/util/exec_cmd.c | |
parent | ebe9729c8c3171aa46ad5d7af40acdc29806689d (diff) |
perf tools: Make perf_exec_path() always return malloc'd string
Since system_path() returns malloc'd string if given path is not an
absolute path, perf_exec_path() sometimes returns a static string and
sometimes returns a malloc'd string depending on the environment
variables or command options.
This may cause a memory leak because the caller can not unconditionally
free the returned string.
This fixes perf_exec_path() and system_path() to always return a
malloc'd string, so the caller can always free it.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20151119060453.14210.65666.stgit@localhost.localdomain
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/exec_cmd.c')
-rw-r--r-- | tools/perf/util/exec_cmd.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/tools/perf/util/exec_cmd.c b/tools/perf/util/exec_cmd.c index 7adf4ad15d8f..1099e92f5ee1 100644 --- a/tools/perf/util/exec_cmd.c +++ b/tools/perf/util/exec_cmd.c @@ -9,17 +9,17 @@ static const char *argv_exec_path; static const char *argv0_path; -const char *system_path(const char *path) +char *system_path(const char *path) { static const char *prefix = PREFIX; struct strbuf d = STRBUF_INIT; if (is_absolute_path(path)) - return path; + return strdup(path); strbuf_addf(&d, "%s/%s", prefix, path); path = strbuf_detach(&d, NULL); - return path; + return (char *)path; } const char *perf_extract_argv0_path(const char *argv0) @@ -52,17 +52,16 @@ void perf_set_argv_exec_path(const char *exec_path) /* Returns the highest-priority, location to look for perf programs. */ -const char *perf_exec_path(void) +char *perf_exec_path(void) { - const char *env; + char *env; if (argv_exec_path) - return argv_exec_path; + return strdup(argv_exec_path); env = getenv(EXEC_PATH_ENVIRONMENT); - if (env && *env) { - return env; - } + if (env && *env) + return strdup(env); return system_path(PERF_EXEC_PATH); } @@ -83,9 +82,11 @@ void setup_path(void) { const char *old_path = getenv("PATH"); struct strbuf new_path = STRBUF_INIT; + char *tmp = perf_exec_path(); - add_path(&new_path, perf_exec_path()); + add_path(&new_path, tmp); add_path(&new_path, argv0_path); + free(tmp); if (old_path) strbuf_addstr(&new_path, old_path); |