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perf script: Remove some large stack allocations

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Some char buffers are stack allocated but in total they come to
24kb. Avoid Wstack-usage warnings by moving the arrays to being
dynamically allocated.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230527034324.2597593-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers
2023-05-26 20:43:20 -07:00
committed by Arnaldo Carvalho de Melo
parent 232418a0b2
commit e590e46b54
1 changed files with 13 additions and 4 deletions
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17
tools/perf/builtin-script.c
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@@ -3318,14 +3318,21 @@ static int list_available_scripts(const struct option *opt __maybe_unused,
int unset __maybe_unused) int unset __maybe_unused)
{ {
struct dirent *script_dirent, *lang_dirent; struct dirent *script_dirent, *lang_dirent;
char scripts_path[MAXPATHLEN]; char *buf, *scripts_path, *script_path, *lang_path, *first_half;
DIR *scripts_dir, *lang_dir; DIR *scripts_dir, *lang_dir;
char script_path[MAXPATHLEN];
char lang_path[MAXPATHLEN];
struct script_desc *desc; struct script_desc *desc;
char first_half[BUFSIZ];
char *script_root; char *script_root;
buf = malloc(3 * MAXPATHLEN + BUFSIZ);
if (!buf) {
pr_err("malloc failed\n");
exit(-1);
}
scripts_path = buf;
script_path = buf + MAXPATHLEN;
lang_path = buf + 2 * MAXPATHLEN;
first_half = buf + 3 * MAXPATHLEN;
snprintf(scripts_path, MAXPATHLEN, "%s/scripts", get_argv_exec_path()); snprintf(scripts_path, MAXPATHLEN, "%s/scripts", get_argv_exec_path());
scripts_dir = opendir(scripts_path); scripts_dir = opendir(scripts_path);
@@ -3334,6 +3341,7 @@ static int list_available_scripts(const struct option *opt __maybe_unused,
"open(%s) failed.\n" "open(%s) failed.\n"
"Check \"PERF_EXEC_PATH\" env to set scripts dir.\n", "Check \"PERF_EXEC_PATH\" env to set scripts dir.\n",
scripts_path); scripts_path);
free(buf);
exit(-1); exit(-1);
} }
@@ -3364,6 +3372,7 @@ static int list_available_scripts(const struct option *opt __maybe_unused,
desc->half_liner ? desc->half_liner : ""); desc->half_liner ? desc->half_liner : "");
} }
free(buf);
exit(0); exit(0);
} }