[tip:perf/core] tools: Introduce str_error_r()

From: tip-bot for Arnaldo Carvalho de Melo
Date: Wed Jul 13 2016 - 03:06:46 EST

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Commit-ID: c8b5f2c96d1bf6cefcbe12f67dce0b892fe20512
Gitweb: http://git.kernel.org/tip/c8b5f2c96d1bf6cefcbe12f67dce0b892fe20512
Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Wed, 6 Jul 2016 11:56:20 -0300
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 12 Jul 2016 15:19:47 -0300

tools: Introduce str_error_r()

The tools so far have been using the strerror_r() GNU variant, that
returns a string, be it the buffer passed or something else.

But that, besides being tricky in cases where we expect that the
function using strerror_r() returns the error formatted in a provided
buffer (we have to check if it returned something else and copy that
instead), breaks the build on systems not using glibc, like Alpine
Linux, where musl libc is used.

So, introduce yet another wrapper, str_error_r(), that has the GNU
interface, but uses the portable XSI variant of strerror_r(), so that
users rest asured that the provided buffer is used and it is what is
returned.

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-d4t42fnf48ytlk8rjxs822tf@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/include/linux/string.h | 2 ++
tools/lib/str_error_r.c | 26 ++++++++++++++++++++++++++
tools/perf/MANIFEST | 1 +
tools/perf/arch/x86/tests/rdpmc.c | 4 ++--
tools/perf/builtin-buildid-cache.c | 8 ++++----
tools/perf/builtin-help.c | 8 ++++----
tools/perf/builtin-kvm.c | 4 ++--
tools/perf/builtin-probe.c | 2 +-
tools/perf/builtin-record.c | 6 +++---
tools/perf/builtin-sched.c | 2 +-
tools/perf/builtin-stat.c | 4 ++--
tools/perf/builtin-top.c | 6 +++---
tools/perf/builtin-trace.c | 4 ++--
tools/perf/perf.c | 6 +++---
tools/perf/tests/backward-ring-buffer.c | 4 ++--
tools/perf/tests/bpf.c | 4 ++--
tools/perf/tests/builtin-test.c | 2 +-
tools/perf/tests/event-times.c | 2 +-
tools/perf/tests/mmap-basic.c | 6 +++---
tools/perf/tests/openat-syscall-all-cpus.c | 4 ++--
tools/perf/tests/openat-syscall-tp-fields.c | 4 ++--
tools/perf/tests/openat-syscall.c | 2 +-
tools/perf/tests/perf-record.c | 8 ++++----
tools/perf/tests/sw-clock.c | 4 ++--
tools/perf/tests/task-exit.c | 4 ++--
tools/perf/ui/browsers/hists.c | 2 +-
tools/perf/util/Build | 5 +++++
tools/perf/util/bpf-loader.c | 2 +-
tools/perf/util/cloexec.c | 4 ++--
tools/perf/util/data.c | 4 ++--
tools/perf/util/debug.h | 2 +-
tools/perf/util/dso.c | 6 +++---
tools/perf/util/evlist.c | 4 ++--
tools/perf/util/evsel.c | 2 +-
tools/perf/util/llvm-utils.c | 8 ++++----
tools/perf/util/probe-event.c | 6 +++---
tools/perf/util/probe-file.c | 10 +++++-----
tools/perf/util/probe-finder.c | 4 ++--
tools/perf/util/python-ext-sources | 1 +
tools/perf/util/target.c | 2 +-
tools/perf/util/util.h | 1 +
41 files changed, 113 insertions(+), 77 deletions(-)

diff --git a/tools/include/linux/string.h b/tools/include/linux/string.h
index e26223f..b466d02 100644
--- a/tools/include/linux/string.h
+++ b/tools/include/linux/string.h
@@ -12,4 +12,6 @@ int strtobool(const char *s, bool *res);
extern size_t strlcpy(char *dest, const char *src, size_t size);
#endif

+char *str_error_r(int errnum, char *buf, size_t buflen);
+
#endif /* _LINUX_STRING_H_ */
diff --git a/tools/lib/str_error_r.c b/tools/lib/str_error_r.c
new file mode 100644
index 0000000..503ae07
--- /dev/null
+++ b/tools/lib/str_error_r.c
@@ -0,0 +1,26 @@
+#undef _GNU_SOURCE
+#include <string.h>
+#include <stdio.h>
+#include <linux/string.h>
+
+/*
+ * The tools so far have been using the strerror_r() GNU variant, that returns
+ * a string, be it the buffer passed or something else.
+ *
+ * But that, besides being tricky in cases where we expect that the function
+ * using strerror_r() returns the error formatted in a provided buffer (we have
+ * to check if it returned something else and copy that instead), breaks the
+ * build on systems not using glibc, like Alpine Linux, where musl libc is
+ * used.
+ *
+ * So, introduce yet another wrapper, str_error_r(), that has the GNU
+ * interface, but uses the portable XSI variant of strerror_r(), so that users
+ * rest asured that the provided buffer is used and it is what is returned.
+ */
+char *str_error_r(int errnum, char *buf, size_t buflen)
+{
+ int err = strerror_r(errnum, buf, buflen);
+ if (err)
+ snprintf(buf, buflen, "INTERNAL ERROR: strerror_r(%d, %p, %zd)=%d", errnum, buf, buflen, err);
+ return buf;
+}
diff --git a/tools/perf/MANIFEST b/tools/perf/MANIFEST
index 8c8c6b9..f18e781 100644
--- a/tools/perf/MANIFEST
+++ b/tools/perf/MANIFEST
@@ -29,6 +29,7 @@ tools/lib/symbol/kallsyms.c
tools/lib/symbol/kallsyms.h
tools/lib/find_bit.c
tools/lib/bitmap.c
+tools/lib/str_error_r.c
tools/include/asm/atomic.h
tools/include/asm/barrier.h
tools/include/asm/bug.h
diff --git a/tools/perf/arch/x86/tests/rdpmc.c b/tools/perf/arch/x86/tests/rdpmc.c
index 72193f19..a32d72e 100644
--- a/tools/perf/arch/x86/tests/rdpmc.c
+++ b/tools/perf/arch/x86/tests/rdpmc.c
@@ -111,14 +111,14 @@ static int __test__rdpmc(void)
if (fd < 0) {
pr_err("Error: sys_perf_event_open() syscall returned "
"with %d (%s)\n", fd,
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
return -1;
}

addr = mmap(NULL, page_size, PROT_READ, MAP_SHARED, fd, 0);
if (addr == (void *)(-1)) {
pr_err("Error: mmap() syscall returned with (%s)\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_close;
}

diff --git a/tools/perf/builtin-buildid-cache.c b/tools/perf/builtin-buildid-cache.c
index 76a4d03..30e2b2c 100644
--- a/tools/perf/builtin-buildid-cache.c
+++ b/tools/perf/builtin-buildid-cache.c
@@ -351,7 +351,7 @@ int cmd_buildid_cache(int argc, const char **argv,
continue;
}
pr_warning("Couldn't add %s: %s\n",
- pos->s, strerror_r(errno, sbuf, sizeof(sbuf)));
+ pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
}

strlist__delete(list);
@@ -369,7 +369,7 @@ int cmd_buildid_cache(int argc, const char **argv,
continue;
}
pr_warning("Couldn't remove %s: %s\n",
- pos->s, strerror_r(errno, sbuf, sizeof(sbuf)));
+ pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
}

strlist__delete(list);
@@ -387,7 +387,7 @@ int cmd_buildid_cache(int argc, const char **argv,
continue;
}
pr_warning("Couldn't remove %s: %s\n",
- pos->s, strerror_r(errno, sbuf, sizeof(sbuf)));
+ pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
}

strlist__delete(list);
@@ -408,7 +408,7 @@ int cmd_buildid_cache(int argc, const char **argv,
continue;
}
pr_warning("Couldn't update %s: %s\n",
- pos->s, strerror_r(errno, sbuf, sizeof(sbuf)));
+ pos->s, str_error_r(errno, sbuf, sizeof(sbuf)));
}

strlist__delete(list);
diff --git a/tools/perf/builtin-help.c b/tools/perf/builtin-help.c
index 268ab73..3bdb2c7 100644
--- a/tools/perf/builtin-help.c
+++ b/tools/perf/builtin-help.c
@@ -117,7 +117,7 @@ static void exec_woman_emacs(const char *path, const char *page)
free(man_page);
}
warning("failed to exec '%s': %s", path,
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
}
}

@@ -150,7 +150,7 @@ static void exec_man_konqueror(const char *path, const char *page)
free(man_page);
}
warning("failed to exec '%s': %s", path,
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
}
}

@@ -162,7 +162,7 @@ static void exec_man_man(const char *path, const char *page)
path = "man";
execlp(path, "man", page, NULL);
warning("failed to exec '%s': %s", path,
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
}

static void exec_man_cmd(const char *cmd, const char *page)
@@ -175,7 +175,7 @@ static void exec_man_cmd(const char *cmd, const char *page)
free(shell_cmd);
}
warning("failed to exec '%s': %s", cmd,
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
}

static void add_man_viewer(const char *name)
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index f4efef9..5e2127e 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -1018,13 +1018,13 @@ static int kvm_live_open_events(struct perf_kvm_stat *kvm)
err = perf_evlist__open(evlist);
if (err < 0) {
printf("Couldn't create the events: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out;
}

if (perf_evlist__mmap(evlist, kvm->opts.mmap_pages, false) < 0) {
ui__error("Failed to mmap the events: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
perf_evlist__close(evlist);
goto out;
}
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index a1a5cd1..c6d890a 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -308,7 +308,7 @@ static void pr_err_with_code(const char *msg, int err)

pr_err("%s", msg);
pr_debug(" Reason: %s (Code: %d)",
- strerror_r(-err, sbuf, sizeof(sbuf)), err);
+ str_error_r(-err, sbuf, sizeof(sbuf)), err);
pr_err("\n");
}

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index b2b3b60..d9f5cc3 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -361,7 +361,7 @@ static int record__mmap_evlist(struct record *rec,
return -errno;
} else {
pr_err("failed to mmap with %d (%s)\n", errno,
- strerror_r(errno, msg, sizeof(msg)));
+ str_error_r(errno, msg, sizeof(msg)));
if (errno)
return -errno;
else
@@ -407,7 +407,7 @@ try_again:
if (perf_evlist__apply_filters(evlist, &pos)) {
error("failed to set filter \"%s\" on event %s with %d (%s)\n",
pos->filter, perf_evsel__name(pos), errno,
- strerror_r(errno, msg, sizeof(msg)));
+ str_error_r(errno, msg, sizeof(msg)));
rc = -1;
goto out;
}
@@ -1003,7 +1003,7 @@ static int __cmd_record(struct record *rec, int argc, const char **argv)

if (forks && workload_exec_errno) {
char msg[STRERR_BUFSIZE];
- const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
+ const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
pr_err("Workload failed: %s\n", emsg);
err = -1;
goto out_child;
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index afa0576..0dfe8df 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -494,7 +494,7 @@ force_again:
}
pr_err("Error: sys_perf_event_open() syscall returned "
"with %d (%s)\n%s", fd,
- strerror_r(errno, sbuf, sizeof(sbuf)), info);
+ str_error_r(errno, sbuf, sizeof(sbuf)), info);
exit(EXIT_FAILURE);
}
return fd;
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index c367a43..8c5a3bf 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -596,7 +596,7 @@ try_again:
if (perf_evlist__apply_filters(evsel_list, &counter)) {
error("failed to set filter \"%s\" on event %s with %d (%s)\n",
counter->filter, perf_evsel__name(counter), errno,
- strerror_r(errno, msg, sizeof(msg)));
+ str_error_r(errno, msg, sizeof(msg)));
return -1;
}

@@ -637,7 +637,7 @@ try_again:
wait(&status);

if (workload_exec_errno) {
- const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
+ const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
pr_err("Workload failed: %s\n", emsg);
return -1;
}
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 07fc792..bd10868 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -907,7 +907,7 @@ try_again:

if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
ui__error("Failed to mmap with %d (%s)\n",
- errno, strerror_r(errno, msg, sizeof(msg)));
+ errno, str_error_r(errno, msg, sizeof(msg)));
goto out_err;
}

@@ -1028,7 +1028,7 @@ out_delete:

out_err_cpu_topo: {
char errbuf[BUFSIZ];
- const char *err = strerror_r(-ret, errbuf, sizeof(errbuf));
+ const char *err = str_error_r(-ret, errbuf, sizeof(errbuf));

ui__error("Could not read the CPU topology map: %s\n", err);
goto out_delete;
@@ -1295,7 +1295,7 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)

if (perf_evlist__create_maps(top.evlist, target) < 0) {
ui__error("Couldn't create thread/CPU maps: %s\n",
- errno == ENOENT ? "No such process" : strerror_r(errno, errbuf, sizeof(errbuf)));
+ errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));
goto out_delete_evlist;
}

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index cf90de8..e7e0b6e 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -1601,7 +1601,7 @@ signed_print:
fprintf(trace->output, ") = %ld", ret);
} else if (ret < 0 && (sc->fmt->errmsg || sc->fmt->errpid)) {
char bf[STRERR_BUFSIZE];
- const char *emsg = strerror_r(-ret, bf, sizeof(bf)),
+ const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
*e = audit_errno_to_name(-ret);

fprintf(trace->output, ") = -1 %s %s", e, emsg);
@@ -2402,7 +2402,7 @@ out_error_apply_filters:
fprintf(trace->output,
"Failed to set filter \"%s\" on event %s with %d (%s)\n",
evsel->filter, perf_evsel__name(evsel), errno,
- strerror_r(errno, errbuf, sizeof(errbuf)));
+ str_error_r(errno, errbuf, sizeof(errbuf)));
goto out_delete_evlist;
}
out_error_mem:
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 8f21922..f7d7dbb 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -374,7 +374,7 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
/* Check for ENOSPC and EIO errors.. */
if (fflush(stdout)) {
fprintf(stderr, "write failure on standard output: %s",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out;
}
if (ferror(stdout)) {
@@ -383,7 +383,7 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
}
if (fclose(stdout)) {
fprintf(stderr, "close failed on standard output: %s",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out;
}
status = 0;
@@ -615,7 +615,7 @@ int main(int argc, const char **argv)
}

fprintf(stderr, "Failed to run command '%s': %s\n",
- cmd, strerror_r(errno, sbuf, sizeof(sbuf)));
+ cmd, str_error_r(errno, sbuf, sizeof(sbuf)));
out:
return 1;
}
diff --git a/tools/perf/tests/backward-ring-buffer.c b/tools/perf/tests/backward-ring-buffer.c
index e70313f..f20ea4c 100644
--- a/tools/perf/tests/backward-ring-buffer.c
+++ b/tools/perf/tests/backward-ring-buffer.c
@@ -60,7 +60,7 @@ static int do_test(struct perf_evlist *evlist, int mmap_pages,
err = perf_evlist__mmap(evlist, mmap_pages, true);
if (err < 0) {
pr_debug("perf_evlist__mmap: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
return TEST_FAIL;
}

@@ -124,7 +124,7 @@ int test__backward_ring_buffer(int subtest __maybe_unused)
err = perf_evlist__open(evlist);
if (err < 0) {
pr_debug("perf_evlist__open: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}

diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index f31eed3..da0d87613 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -143,14 +143,14 @@ static int do_test(struct bpf_object *obj, int (*func)(void),
err = perf_evlist__open(evlist);
if (err < 0) {
pr_debug("perf_evlist__open: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}

err = perf_evlist__mmap(evlist, opts.mmap_pages, false);
if (err < 0) {
pr_debug("perf_evlist__mmap: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}

diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 07c14e9..c23cbf7 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -258,7 +258,7 @@ static int run_test(struct test *test, int subtest)

if (child < 0) {
pr_err("failed to fork test: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
return -1;
}

diff --git a/tools/perf/tests/event-times.c b/tools/perf/tests/event-times.c
index 9f5698a..19ef77b 100644
--- a/tools/perf/tests/event-times.c
+++ b/tools/perf/tests/event-times.c
@@ -37,7 +37,7 @@ static int attach__enable_on_exec(struct perf_evlist *evlist)
err = perf_evlist__open(evlist);
if (err < 0) {
pr_debug("perf_evlist__open: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
return err;
}

diff --git a/tools/perf/tests/mmap-basic.c b/tools/perf/tests/mmap-basic.c
index aea33f5..5c9b931 100644
--- a/tools/perf/tests/mmap-basic.c
+++ b/tools/perf/tests/mmap-basic.c
@@ -49,7 +49,7 @@ int test__basic_mmap(int subtest __maybe_unused)
sched_setaffinity(0, sizeof(cpu_set), &cpu_set);
if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
pr_debug("sched_setaffinity() failed on CPU %d: %s ",
- cpus->map[0], strerror_r(errno, sbuf, sizeof(sbuf)));
+ cpus->map[0], str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_free_cpus;
}

@@ -79,7 +79,7 @@ int test__basic_mmap(int subtest __maybe_unused)
if (perf_evsel__open(evsels[i], cpus, threads) < 0) {
pr_debug("failed to open counter: %s, "
"tweak /proc/sys/kernel/perf_event_paranoid?\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}

@@ -89,7 +89,7 @@ int test__basic_mmap(int subtest __maybe_unused)

if (perf_evlist__mmap(evlist, 128, true) < 0) {
pr_debug("failed to mmap events: %d (%s)\n", errno,
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}

diff --git a/tools/perf/tests/openat-syscall-all-cpus.c b/tools/perf/tests/openat-syscall-all-cpus.c
index ad1cb63..265abb1 100644
--- a/tools/perf/tests/openat-syscall-all-cpus.c
+++ b/tools/perf/tests/openat-syscall-all-cpus.c
@@ -41,7 +41,7 @@ int test__openat_syscall_event_on_all_cpus(int subtest __maybe_unused)
if (perf_evsel__open(evsel, cpus, threads) < 0) {
pr_debug("failed to open counter: %s, "
"tweak /proc/sys/kernel/perf_event_paranoid?\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_evsel_delete;
}

@@ -62,7 +62,7 @@ int test__openat_syscall_event_on_all_cpus(int subtest __maybe_unused)
if (sched_setaffinity(0, sizeof(cpu_set), &cpu_set) < 0) {
pr_debug("sched_setaffinity() failed on CPU %d: %s ",
cpus->map[cpu],
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_close_fd;
}
for (i = 0; i < ncalls; ++i) {
diff --git a/tools/perf/tests/openat-syscall-tp-fields.c b/tools/perf/tests/openat-syscall-tp-fields.c
index 4344fe4..942dbf4 100644
--- a/tools/perf/tests/openat-syscall-tp-fields.c
+++ b/tools/perf/tests/openat-syscall-tp-fields.c
@@ -51,14 +51,14 @@ int test__syscall_openat_tp_fields(int subtest __maybe_unused)
err = perf_evlist__open(evlist);
if (err < 0) {
pr_debug("perf_evlist__open: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}

err = perf_evlist__mmap(evlist, UINT_MAX, false);
if (err < 0) {
pr_debug("perf_evlist__mmap: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}

diff --git a/tools/perf/tests/openat-syscall.c b/tools/perf/tests/openat-syscall.c
index 1184f9b..d741412 100644
--- a/tools/perf/tests/openat-syscall.c
+++ b/tools/perf/tests/openat-syscall.c
@@ -29,7 +29,7 @@ int test__openat_syscall_event(int subtest __maybe_unused)
if (perf_evsel__open_per_thread(evsel, threads) < 0) {
pr_debug("failed to open counter: %s, "
"tweak /proc/sys/kernel/perf_event_paranoid?\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_evsel_delete;
}

diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index b836ee6a..3eb67a9 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -104,7 +104,7 @@ int test__PERF_RECORD(int subtest __maybe_unused)
err = sched__get_first_possible_cpu(evlist->workload.pid, &cpu_mask);
if (err < 0) {
pr_debug("sched__get_first_possible_cpu: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}

@@ -115,7 +115,7 @@ int test__PERF_RECORD(int subtest __maybe_unused)
*/
if (sched_setaffinity(evlist->workload.pid, cpu_mask_size, &cpu_mask) < 0) {
pr_debug("sched_setaffinity: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}

@@ -126,7 +126,7 @@ int test__PERF_RECORD(int subtest __maybe_unused)
err = perf_evlist__open(evlist);
if (err < 0) {
pr_debug("perf_evlist__open: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}

@@ -138,7 +138,7 @@ int test__PERF_RECORD(int subtest __maybe_unused)
err = perf_evlist__mmap(evlist, opts.mmap_pages, false);
if (err < 0) {
pr_debug("perf_evlist__mmap: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}

diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c
index 36e8ce1..4c9fd04 100644
--- a/tools/perf/tests/sw-clock.c
+++ b/tools/perf/tests/sw-clock.c
@@ -70,7 +70,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)

err = -errno;
pr_debug("Couldn't open evlist: %s\nHint: check %s, using %" PRIu64 " in this test.\n",
- strerror_r(errno, sbuf, sizeof(sbuf)),
+ str_error_r(errno, sbuf, sizeof(sbuf)),
knob, (u64)attr.sample_freq);
goto out_delete_evlist;
}
@@ -78,7 +78,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
err = perf_evlist__mmap(evlist, 128, true);
if (err < 0) {
pr_debug("failed to mmap event: %d (%s)\n", errno,
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}

diff --git a/tools/perf/tests/task-exit.c b/tools/perf/tests/task-exit.c
index 2dfff7a..01a5ba2 100644
--- a/tools/perf/tests/task-exit.c
+++ b/tools/perf/tests/task-exit.c
@@ -91,13 +91,13 @@ int test__task_exit(int subtest __maybe_unused)
err = perf_evlist__open(evlist);
if (err < 0) {
pr_debug("Couldn't open the evlist: %s\n",
- strerror_r(-err, sbuf, sizeof(sbuf)));
+ str_error_r(-err, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}

if (perf_evlist__mmap(evlist, 128, true) < 0) {
pr_debug("failed to mmap events: %d (%s)\n", errno,
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
goto out_delete_evlist;
}

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index e08b8f7..13d4143 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -2029,7 +2029,7 @@ static int hist_browser__dump(struct hist_browser *browser)
fp = fopen(filename, "w");
if (fp == NULL) {
char bf[64];
- const char *err = strerror_r(errno, bf, sizeof(bf));
+ const char *err = str_error_r(errno, bf, sizeof(bf));
ui_helpline__fpush("Couldn't write to %s: %s", filename, err);
return -1;
}
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index fced833..a6a8053 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -70,6 +70,7 @@ libperf-y += stat.o
libperf-y += stat-shadow.o
libperf-y += record.o
libperf-y += srcline.o
+libperf-y += str_error_r.o
libperf-y += data.o
libperf-y += tsc.o
libperf-y += cloexec.o
@@ -173,6 +174,10 @@ $(OUTPUT)util/libstring.o: ../lib/string.c FORCE
$(call rule_mkdir)
$(call if_changed_dep,cc_o_c)

+$(OUTPUT)util/str_error_r.o: ../lib/str_error_r.c FORCE
+ $(call rule_mkdir)
+ $(call if_changed_dep,cc_o_c)
+
$(OUTPUT)util/hweight.o: ../lib/hweight.c FORCE
$(call rule_mkdir)
$(call if_changed_dep,cc_o_c)
diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index dcc8845..8445e89 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -1589,7 +1589,7 @@ bpf_loader_strerror(int err, char *buf, size_t size)
snprintf(buf, size, "Unknown bpf loader error %d", err);
else
snprintf(buf, size, "%s",
- strerror_r(err, sbuf, sizeof(sbuf)));
+ str_error_r(err, sbuf, sizeof(sbuf)));

buf[size - 1] = '\0';
return -1;
diff --git a/tools/perf/util/cloexec.c b/tools/perf/util/cloexec.c
index 2babdda..fde772d 100644
--- a/tools/perf/util/cloexec.c
+++ b/tools/perf/util/cloexec.c
@@ -58,7 +58,7 @@ static int perf_flag_probe(void)

WARN_ONCE(err != EINVAL && err != EBUSY,
"perf_event_open(..., PERF_FLAG_FD_CLOEXEC) failed with unexpected error %d (%s)\n",
- err, strerror_r(err, sbuf, sizeof(sbuf)));
+ err, str_error_r(err, sbuf, sizeof(sbuf)));

/* not supported, confirm error related to PERF_FLAG_FD_CLOEXEC */
while (1) {
@@ -76,7 +76,7 @@ static int perf_flag_probe(void)

if (WARN_ONCE(fd < 0 && err != EBUSY,
"perf_event_open(..., 0) failed unexpectedly with error %d (%s)\n",
- err, strerror_r(err, sbuf, sizeof(sbuf))))
+ err, str_error_r(err, sbuf, sizeof(sbuf))))
return -1;

return 0;
diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
index be835161..60bfc9c 100644
--- a/tools/perf/util/data.c
+++ b/tools/perf/util/data.c
@@ -57,7 +57,7 @@ static int open_file_read(struct perf_data_file *file)
int err = errno;

pr_err("failed to open %s: %s", file->path,
- strerror_r(err, sbuf, sizeof(sbuf)));
+ str_error_r(err, sbuf, sizeof(sbuf)));
if (err == ENOENT && !strcmp(file->path, "perf.data"))
pr_err(" (try 'perf record' first)");
pr_err("\n");
@@ -99,7 +99,7 @@ static int open_file_write(struct perf_data_file *file)

if (fd < 0)
pr_err("failed to open %s : %s\n", file->path,
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));

return fd;
}
diff --git a/tools/perf/util/debug.h b/tools/perf/util/debug.h
index 14bafda..d242adc 100644
--- a/tools/perf/util/debug.h
+++ b/tools/perf/util/debug.h
@@ -38,7 +38,7 @@ extern int debug_data_convert;
#define pr_oe_time(t, fmt, ...) pr_time_N(1, debug_ordered_events, t, pr_fmt(fmt), ##__VA_ARGS__)
#define pr_oe_time2(t, fmt, ...) pr_time_N(2, debug_ordered_events, t, pr_fmt(fmt), ##__VA_ARGS__)

-#define STRERR_BUFSIZE 128 /* For the buffer size of strerror_r */
+#define STRERR_BUFSIZE 128 /* For the buffer size of str_error_r */

int dump_printf(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
void trace_event(union perf_event *event);
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index e1de6cc..774f6ec 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -335,7 +335,7 @@ static int do_open(char *name)
return fd;

pr_debug("dso open failed: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
if (!dso__data_open_cnt || errno != EMFILE)
break;

@@ -786,7 +786,7 @@ static int data_file_size(struct dso *dso, struct machine *machine)
if (fstat(dso->data.fd, &st) < 0) {
ret = -errno;
pr_err("dso cache fstat failed: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
dso->data.status = DSO_DATA_STATUS_ERROR;
goto out;
}
@@ -1366,7 +1366,7 @@ int dso__strerror_load(struct dso *dso, char *buf, size_t buflen)
BUG_ON(buflen == 0);

if (errnum >= 0) {
- const char *err = strerror_r(errnum, buf, buflen);
+ const char *err = str_error_r(errnum, buf, buflen);

if (err != buf)
scnprintf(buf, buflen, "%s", err);
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 1135077..f2d478d 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1790,7 +1790,7 @@ int perf_evlist__strerror_open(struct perf_evlist *evlist,
int err, char *buf, size_t size)
{
int printed, value;
- char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf));
+ char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf));

switch (err) {
case EACCES:
@@ -1842,7 +1842,7 @@ out_default:

int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size)
{
- char sbuf[STRERR_BUFSIZE], *emsg = strerror_r(err, sbuf, sizeof(sbuf));
+ char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf));
int pages_attempted = evlist->mmap_len / 1024, pages_max_per_user, printed = 0;

switch (err) {
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 0fea724..d8c2298 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -2419,7 +2419,7 @@ int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target,
"The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n"
"/bin/dmesg may provide additional information.\n"
"No CONFIG_PERF_EVENTS=y kernel support configured?",
- err, strerror_r(err, sbuf, sizeof(sbuf)),
+ err, str_error_r(err, sbuf, sizeof(sbuf)),
perf_evsel__name(evsel));
}

diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c
index 40b6f72..282c30f 100644
--- a/tools/perf/util/llvm-utils.c
+++ b/tools/perf/util/llvm-utils.c
@@ -106,7 +106,7 @@ read_from_pipe(const char *cmd, void **p_buf, size_t *p_read_sz)
file = popen(cmd, "r");
if (!file) {
pr_err("ERROR: unable to popen cmd: %s\n",
- strerror_r(errno, serr, sizeof(serr)));
+ str_error_r(errno, serr, sizeof(serr)));
return -EINVAL;
}

@@ -140,7 +140,7 @@ read_from_pipe(const char *cmd, void **p_buf, size_t *p_read_sz)

if (ferror(file)) {
pr_err("ERROR: error occurred when reading from pipe: %s\n",
- strerror_r(errno, serr, sizeof(serr)));
+ str_error_r(errno, serr, sizeof(serr)));
err = -EIO;
goto errout;
}
@@ -382,7 +382,7 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf,
if (path[0] != '-' && realpath(path, abspath) == NULL) {
err = errno;
pr_err("ERROR: problems with path %s: %s\n",
- path, strerror_r(err, serr, sizeof(serr)));
+ path, str_error_r(err, serr, sizeof(serr)));
return -err;
}

@@ -410,7 +410,7 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf,
if (nr_cpus_avail <= 0) {
pr_err(
"WARNING:\tunable to get available CPUs in this system: %s\n"
-" \tUse 128 instead.\n", strerror_r(errno, serr, sizeof(serr)));
+" \tUse 128 instead.\n", str_error_r(errno, serr, sizeof(serr)));
nr_cpus_avail = 128;
}
snprintf(nr_cpus_avail_str, sizeof(nr_cpus_avail_str), "%d",
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 0201f66..2b222a7 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -468,7 +468,7 @@ static struct debuginfo *open_debuginfo(const char *module, bool silent)
err = kernel_get_module_dso(module, &dso);
if (err < 0) {
if (!dso || dso->load_errno == 0) {
- if (!strerror_r(-err, reason, STRERR_BUFSIZE))
+ if (!str_error_r(-err, reason, STRERR_BUFSIZE))
strcpy(reason, "(unknown)");
} else
dso__strerror_load(dso, reason, STRERR_BUFSIZE);
@@ -806,7 +806,7 @@ static int __show_one_line(FILE *fp, int l, bool skip, bool show_num)
error:
if (ferror(fp)) {
pr_warning("File read error: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
return -1;
}
return 0;
@@ -886,7 +886,7 @@ static int __show_line_range(struct line_range *lr, const char *module,
fp = fopen(lr->path, "r");
if (fp == NULL) {
pr_warning("Failed to open %s: %s\n", lr->path,
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
return -errno;
}
/* Skip to starting line number */
diff --git a/tools/perf/util/probe-file.c b/tools/perf/util/probe-file.c
index 5b563b2..98398b5 100644
--- a/tools/perf/util/probe-file.c
+++ b/tools/perf/util/probe-file.c
@@ -50,7 +50,7 @@ static void print_open_warning(int err, bool uprobe)
else
pr_warning("Failed to open %cprobe_events: %s\n",
uprobe ? 'u' : 'k',
- strerror_r(-err, sbuf, sizeof(sbuf)));
+ str_error_r(-err, sbuf, sizeof(sbuf)));
}

static void print_both_open_warning(int kerr, int uerr)
@@ -64,9 +64,9 @@ static void print_both_open_warning(int kerr, int uerr)
else {
char sbuf[STRERR_BUFSIZE];
pr_warning("Failed to open kprobe events: %s.\n",
- strerror_r(-kerr, sbuf, sizeof(sbuf)));
+ str_error_r(-kerr, sbuf, sizeof(sbuf)));
pr_warning("Failed to open uprobe events: %s.\n",
- strerror_r(-uerr, sbuf, sizeof(sbuf)));
+ str_error_r(-uerr, sbuf, sizeof(sbuf)));
}
}

@@ -224,7 +224,7 @@ int probe_file__add_event(int fd, struct probe_trace_event *tev)
if (write(fd, buf, strlen(buf)) < (int)strlen(buf)) {
ret = -errno;
pr_warning("Failed to write event: %s\n",
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
}
}
free(buf);
@@ -262,7 +262,7 @@ static int __del_trace_probe_event(int fd, struct str_node *ent)
return 0;
error:
pr_warning("Failed to delete event: %s\n",
- strerror_r(-ret, buf, sizeof(buf)));
+ str_error_r(-ret, buf, sizeof(buf)));
return ret;
}

diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 1259839..f2d9ff0 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -381,7 +381,7 @@ formatted:
if (ret >= 16)
ret = -E2BIG;
pr_warning("Failed to convert variable type: %s\n",
- strerror_r(-ret, sbuf, sizeof(sbuf)));
+ str_error_r(-ret, sbuf, sizeof(sbuf)));
return ret;
}
tvar->type = strdup(buf);
@@ -809,7 +809,7 @@ static int find_lazy_match_lines(struct intlist *list,
fp = fopen(fname, "r");
if (!fp) {
pr_warning("Failed to open %s: %s\n", fname,
- strerror_r(errno, sbuf, sizeof(sbuf)));
+ str_error_r(errno, sbuf, sizeof(sbuf)));
return -errno;
}

diff --git a/tools/perf/util/python-ext-sources b/tools/perf/util/python-ext-sources
index 36c6862..49210b7 100644
--- a/tools/perf/util/python-ext-sources
+++ b/tools/perf/util/python-ext-sources
@@ -13,6 +13,7 @@ util/cpumap.c
../lib/bitmap.c
../lib/find_bit.c
../lib/hweight.c
+../lib/str_error_r.c
util/thread_map.c
util/util.c
util/xyarray.c
diff --git a/tools/perf/util/target.c b/tools/perf/util/target.c
index a53603b..5898af4 100644
--- a/tools/perf/util/target.c
+++ b/tools/perf/util/target.c
@@ -121,7 +121,7 @@ int target__strerror(struct target *target, int errnum,
BUG_ON(buflen == 0);

if (errnum >= 0) {
- const char *err = strerror_r(errnum, buf, buflen);
+ const char *err = str_error_r(errnum, buf, buflen);

if (err != buf)
scnprintf(buf, buflen, "%s", err);
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 1e8c316..2370cfb 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -360,4 +360,5 @@ typedef void (*print_binary_t)(enum binary_printer_ops,
void print_binary(unsigned char *data, size_t len,
size_t bytes_per_line, print_binary_t printer,
void *extra);
+
#endif /* GIT_COMPAT_UTIL_H */

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