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authorJiri Olsa <jolsa@kernel.org>2018-03-19 09:29:01 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-10-18 09:16:28 +0200
commitd0c9f9f9fb446e31b36d76e9a47001188f961a44 (patch)
treed7d7437b4e4da6b608ae9a078f437fd6a3133d14
parent57bff812c4e2ca91a876f759198f2cd9e15967ad (diff)
perf tools: Fix snprint warnings for gcc 8
commit 77f18153c080855e1c3fb520ca31a4e61530121d upstream. With gcc 8 we get new set of snprintf() warnings that breaks the compilation, one example: tests/mem.c: In function ‘check’: tests/mem.c:19:48: error: ‘%s’ directive output may be truncated writing \ up to 99 bytes into a region of size 89 [-Werror=format-truncation=] snprintf(failure, sizeof failure, "unexpected %s", out); The gcc docs says: To avoid the warning either use a bigger buffer or handle the function's return value which indicates whether or not its output has been truncated. Given that all these warnings are harmless, because the code either properly fails due to uncomplete file path or we don't care for truncated output at all, I'm changing all those snprintf() calls to scnprintf(), which actually 'checks' for the snprint return value so the gcc stays silent. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> Link: http://lkml.kernel.org/r/20180319082902.4518-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Ignat Korchagin <ignat@cloudflare.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--tools/perf/builtin-script.c22
-rw-r--r--tools/perf/tests/attr.c4
-rw-r--r--tools/perf/tests/mem.c2
-rw-r--r--tools/perf/tests/pmu.c2
-rw-r--r--tools/perf/util/cgroup.c2
-rw-r--r--tools/perf/util/parse-events.c4
-rw-r--r--tools/perf/util/pmu.c2
7 files changed, 19 insertions, 19 deletions
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index e37653b0f2d0..76789523429a 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -2304,8 +2304,8 @@ static int list_available_scripts(const struct option *opt __maybe_unused,
}
for_each_lang(scripts_path, scripts_dir, lang_dirent) {
- snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
- lang_dirent->d_name);
+ scnprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
+ lang_dirent->d_name);
lang_dir = opendir(lang_path);
if (!lang_dir)
continue;
@@ -2314,8 +2314,8 @@ static int list_available_scripts(const struct option *opt __maybe_unused,
script_root = get_script_root(script_dirent, REPORT_SUFFIX);
if (script_root) {
desc = script_desc__findnew(script_root);
- snprintf(script_path, MAXPATHLEN, "%s/%s",
- lang_path, script_dirent->d_name);
+ scnprintf(script_path, MAXPATHLEN, "%s/%s",
+ lang_path, script_dirent->d_name);
read_script_info(desc, script_path);
free(script_root);
}
@@ -2351,7 +2351,7 @@ static int check_ev_match(char *dir_name, char *scriptname,
int match, len;
FILE *fp;
- sprintf(filename, "%s/bin/%s-record", dir_name, scriptname);
+ scnprintf(filename, MAXPATHLEN, "%s/bin/%s-record", dir_name, scriptname);
fp = fopen(filename, "r");
if (!fp)
@@ -2427,8 +2427,8 @@ int find_scripts(char **scripts_array, char **scripts_path_array)
}
for_each_lang(scripts_path, scripts_dir, lang_dirent) {
- snprintf(lang_path, MAXPATHLEN, "%s/%s", scripts_path,
- lang_dirent->d_name);
+ scnprintf(lang_path, MAXPATHLEN, "%s/%s", scripts_path,
+ lang_dirent->d_name);
#ifdef NO_LIBPERL
if (strstr(lang_path, "perl"))
continue;
@@ -2483,8 +2483,8 @@ static char *get_script_path(const char *script_root, const char *suffix)
return NULL;
for_each_lang(scripts_path, scripts_dir, lang_dirent) {
- snprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
- lang_dirent->d_name);
+ scnprintf(lang_path, MAXPATHLEN, "%s/%s/bin", scripts_path,
+ lang_dirent->d_name);
lang_dir = opendir(lang_path);
if (!lang_dir)
continue;
@@ -2495,8 +2495,8 @@ static char *get_script_path(const char *script_root, const char *suffix)
free(__script_root);
closedir(lang_dir);
closedir(scripts_dir);
- snprintf(script_path, MAXPATHLEN, "%s/%s",
- lang_path, script_dirent->d_name);
+ scnprintf(script_path, MAXPATHLEN, "%s/%s",
+ lang_path, script_dirent->d_name);
return strdup(script_path);
}
free(__script_root);
diff --git a/tools/perf/tests/attr.c b/tools/perf/tests/attr.c
index 0e1367f90af5..60fea0a376fc 100644
--- a/tools/perf/tests/attr.c
+++ b/tools/perf/tests/attr.c
@@ -164,8 +164,8 @@ static int run_dir(const char *d, const char *perf)
if (verbose > 0)
vcnt++;
- snprintf(cmd, 3*PATH_MAX, PYTHON " %s/attr.py -d %s/attr/ -p %s %.*s",
- d, d, perf, vcnt, v);
+ scnprintf(cmd, 3*PATH_MAX, PYTHON " %s/attr.py -d %s/attr/ -p %s %.*s",
+ d, d, perf, vcnt, v);
return system(cmd) ? TEST_FAIL : TEST_OK;
}
diff --git a/tools/perf/tests/mem.c b/tools/perf/tests/mem.c
index 21952e1e6e6d..0f82ee9fd3f7 100644
--- a/tools/perf/tests/mem.c
+++ b/tools/perf/tests/mem.c
@@ -16,7 +16,7 @@ static int check(union perf_mem_data_src data_src,
n = perf_mem__snp_scnprintf(out, sizeof out, &mi);
n += perf_mem__lvl_scnprintf(out + n, sizeof out - n, &mi);
- snprintf(failure, sizeof failure, "unexpected %s", out);
+ scnprintf(failure, sizeof failure, "unexpected %s", out);
TEST_ASSERT_VAL(failure, !strcmp(string, out));
return 0;
}
diff --git a/tools/perf/tests/pmu.c b/tools/perf/tests/pmu.c
index 9abca267afa9..7bedf8608fdd 100644
--- a/tools/perf/tests/pmu.c
+++ b/tools/perf/tests/pmu.c
@@ -98,7 +98,7 @@ static char *test_format_dir_get(void)
struct test_format *format = &test_formats[i];
FILE *file;
- snprintf(name, PATH_MAX, "%s/%s", dir, format->name);
+ scnprintf(name, PATH_MAX, "%s/%s", dir, format->name);
file = fopen(name, "w");
if (!file)
diff --git a/tools/perf/util/cgroup.c b/tools/perf/util/cgroup.c
index d9ffc1e6eb39..ce6bcb0a5368 100644
--- a/tools/perf/util/cgroup.c
+++ b/tools/perf/util/cgroup.c
@@ -78,7 +78,7 @@ static int open_cgroup(char *name)
if (cgroupfs_find_mountpoint(mnt, PATH_MAX + 1))
return -1;
- snprintf(path, PATH_MAX, "%s/%s", mnt, name);
+ scnprintf(path, PATH_MAX, "%s/%s", mnt, name);
fd = open(path, O_RDONLY);
if (fd == -1)
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index b25635e945f3..53f620472151 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -202,8 +202,8 @@ struct tracepoint_path *tracepoint_id_to_path(u64 config)
for_each_event(sys_dirent, evt_dir, evt_dirent) {
- snprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
- evt_dirent->d_name);
+ scnprintf(evt_path, MAXPATHLEN, "%s/%s/id", dir_path,
+ evt_dirent->d_name);
fd = open(evt_path, O_RDONLY);
if (fd < 0)
continue;
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 9dff41bcc776..d87d458996b7 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -349,7 +349,7 @@ static int pmu_aliases_parse(char *dir, struct list_head *head)
if (pmu_alias_info_file(name))
continue;
- snprintf(path, PATH_MAX, "%s/%s", dir, name);
+ scnprintf(path, PATH_MAX, "%s/%s", dir, name);
file = fopen(path, "r");
if (!file) {