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selftests/harness: Move test child waiting logic

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In order to better handle timeout failures, rearrange the child waiting
logic into a separate function. This is mostly a copy/paste with an
indentation change. To handle pid tracking, a new field is added for
the child pid. Also move the alarm() pairing into the function.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Kees Cook 2020-03-13 16:12:51 -07:00 committed by Shuah Khan
parent fb0bb39524
commit f46f576280
1 changed files with 49 additions and 44 deletions
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93
tools/testing/selftests/kselftest_harness.h
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@ -635,6 +635,7 @@
struct __test_metadata {
const char *name;
void (*fn)(struct __test_metadata *);
pid_t pid; /* pid of test when being run */
int termsig;
int passed;
int trigger; /* extra handler after the evaluation */
@ -695,64 +696,68 @@ static inline int __bail(int for_realz, bool no_print, __u8 step)
return 0;
}
void __run_test(struct __test_metadata *t)
void __wait_for_test(struct __test_metadata *t)
{
pid_t child_pid;
int status;
alarm(t->timeout);
waitpid(t->pid, &status, 0);
alarm(0);
if (WIFEXITED(status)) {
t->passed = t->termsig == -1 ? !WEXITSTATUS(status) : 0;
if (t->termsig != -1) {
fprintf(TH_LOG_STREAM,
"%s: Test exited normally "
"instead of by signal (code: %d)\n",
t->name,
WEXITSTATUS(status));
} else if (!t->passed) {
fprintf(TH_LOG_STREAM,
"%s: Test failed at step #%d\n",
t->name,
WEXITSTATUS(status));
}
} else if (WIFSIGNALED(status)) {
t->passed = 0;
if (WTERMSIG(status) == SIGABRT) {
fprintf(TH_LOG_STREAM,
"%s: Test terminated by assertion\n",
t->name);
} else if (WTERMSIG(status) == t->termsig) {
t->passed = 1;
} else {
fprintf(TH_LOG_STREAM,
"%s: Test terminated unexpectedly "
"by signal %d\n",
t->name,
WTERMSIG(status));
}
} else {
fprintf(TH_LOG_STREAM,
"%s: Test ended in some other way [%u]\n",
t->name,
status);
}
}
void __run_test(struct __test_metadata *t)
{
t->passed = 1;
t->trigger = 0;
printf("[ RUN ] %s\n", t->name);
alarm(t->timeout);
child_pid = fork();
if (child_pid < 0) {
t->pid = fork();
if (t->pid < 0) {
printf("ERROR SPAWNING TEST CHILD\n");
t->passed = 0;
} else if (child_pid == 0) {
} else if (t->pid == 0) {
t->fn(t);
/* return the step that failed or 0 */
_exit(t->passed ? 0 : t->step);
} else {
/* TODO(wad) add timeout support. */
waitpid(child_pid, &status, 0);
if (WIFEXITED(status)) {
t->passed = t->termsig == -1 ? !WEXITSTATUS(status) : 0;
if (t->termsig != -1) {
fprintf(TH_LOG_STREAM,
"%s: Test exited normally "
"instead of by signal (code: %d)\n",
t->name,
WEXITSTATUS(status));
} else if (!t->passed) {
fprintf(TH_LOG_STREAM,
"%s: Test failed at step #%d\n",
t->name,
WEXITSTATUS(status));
}
} else if (WIFSIGNALED(status)) {
t->passed = 0;
if (WTERMSIG(status) == SIGABRT) {
fprintf(TH_LOG_STREAM,
"%s: Test terminated by assertion\n",
t->name);
} else if (WTERMSIG(status) == t->termsig) {
t->passed = 1;
} else {
fprintf(TH_LOG_STREAM,
"%s: Test terminated unexpectedly "
"by signal %d\n",
t->name,
WTERMSIG(status));
}
} else {
fprintf(TH_LOG_STREAM,
"%s: Test ended in some other way [%u]\n",
t->name,
status);
}
__wait_for_test(t);
}
printf("[ %4s ] %s\n", (t->passed ? "OK" : "FAIL"), t->name);
alarm(0);
}
static int test_harness_run(int __attribute__((unused)) argc,