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author | Ian Rogers <irogers@google.com> | 2024-10-25 12:21:05 -0700 |
---|---|---|
committer | Namhyung Kim <namhyung@kernel.org> | 2024-10-28 09:32:58 -0700 |
commit | a6fffc60940a903ebcd70d44f047277ba5188225 (patch) | |
tree | d40ab96308136a58e424002f2be2ae7ef0ccc1fe /tools/perf/tests/builtin-test.c | |
parent | 2532be3d219d8819e59dc52a5ead4696b8354a82 (diff) | |
download | lwn-a6fffc60940a903ebcd70d44f047277ba5188225.tar.gz lwn-a6fffc60940a903ebcd70d44f047277ba5188225.zip |
perf test: Add a signal handler around running a test
Add a signal handler around running a test. If a signal occurs during
the test a siglongjmp unwinds the stack and output is flushed. The
global run_test_jmp_buf is either unique per forked child or not
shared during sequential execution.
Tested-by: James Clark <james.clark@linaro.org>
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Colin Ian King <colin.i.king@gmail.com>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Weilin Wang <weilin.wang@intel.com>
Cc: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dapeng Mi <dapeng1.mi@linux.intel.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Veronika Molnarova <vmolnaro@redhat.com>
Link: https://lore.kernel.org/r/20241025192109.132482-7-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'tools/perf/tests/builtin-test.c')
-rw-r--r-- | tools/perf/tests/builtin-test.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index 0e8f877f4b1f..8a720ddb0396 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -8,6 +8,7 @@ #include <errno.h> #include <poll.h> #include <unistd.h> +#include <setjmp.h> #include <string.h> #include <stdlib.h> #include <sys/types.h> @@ -229,16 +230,41 @@ struct child_test { int subtest; }; +static jmp_buf run_test_jmp_buf; + +static void child_test_sig_handler(int sig) +{ + siglongjmp(run_test_jmp_buf, sig); +} + static int run_test_child(struct child_process *process) { - struct child_test *child = container_of(process, struct child_test, process); + const int signals[] = { + SIGABRT, SIGBUS, SIGFPE, SIGILL, SIGINT, SIGPIPE, SIGQUIT, SIGSEGV, SIGTERM, + }; + static struct child_test *child; int err; + err = sigsetjmp(run_test_jmp_buf, 1); + if (err) { + fprintf(stderr, "\n---- unexpected signal (%d) ----\n", err); + err = err > 0 ? -err : -1; + goto err_out; + } + + child = container_of(process, struct child_test, process); + for (size_t i = 0; i < ARRAY_SIZE(signals); i++) + signal(signals[i], child_test_sig_handler); + pr_debug("--- start ---\n"); pr_debug("test child forked, pid %d\n", getpid()); err = test_function(child->test, child->subtest)(child->test, child->subtest); pr_debug("---- end(%d) ----\n", err); + +err_out: fflush(NULL); + for (size_t i = 0; i < ARRAY_SIZE(signals); i++) + signal(signals[i], SIG_DFL); return -err; } |