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tools: Introduce str_error_r()

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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@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-d4t42fnf48ytlk8rjxs822tf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
2016-07-06 11:56:20 -03:00
parent ffe3a28a8b
commit c8b5f2c96d
41 changed files with 113 additions and 77 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
tools/perf/tests/backward-ring-buffer.c
View File

@@ -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;
}

4
tools/perf/tests/bpf.c
View File

@@ -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;
}

2
tools/perf/tests/builtin-test.c
View File

@@ -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;
}

2
tools/perf/tests/event-times.c
View File

@@ -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;
}

6
tools/perf/tests/mmap-basic.c
View File

@@ -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;
}

4
tools/perf/tests/openat-syscall-all-cpus.c
View File

@@ -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) {

4
tools/perf/tests/openat-syscall-tp-fields.c
View File

@@ -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;
}

2
tools/perf/tests/openat-syscall.c
View File

@@ -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;
}

8
tools/perf/tests/perf-record.c
View File

@@ -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;
}

4
tools/perf/tests/sw-clock.c
View File

@@ -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;
}

4
tools/perf/tests/task-exit.c
View File

@@ -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;
}