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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/testing/selftests/powerpc/signal/signal.c | |
parent | Initial commit. (diff) | |
download | linux-430c2fc249ea5c0536abd21c23382884005c9093.tar.xz linux-430c2fc249ea5c0536abd21c23382884005c9093.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/testing/selftests/powerpc/signal/signal.c')
-rw-r--r-- | tools/testing/selftests/powerpc/signal/signal.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/signal/signal.c b/tools/testing/selftests/powerpc/signal/signal.c new file mode 100644 index 000000000..766e484d9 --- /dev/null +++ b/tools/testing/selftests/powerpc/signal/signal.c @@ -0,0 +1,107 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright 2016, Cyril Bur, IBM Corp. + * + * Sending one self a signal should always get delivered. + */ + +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <unistd.h> + +#include <altivec.h> + +#include "utils.h" + +#define MAX_ATTEMPT 500000 +#define TIMEOUT 5 + +extern long signal_self(pid_t pid, int sig); + +static sig_atomic_t signaled; +static sig_atomic_t fail; + +static void signal_handler(int sig) +{ + if (sig == SIGUSR1) + signaled = 1; + else + fail = 1; +} + +static int test_signal() +{ + int i; + struct sigaction act; + pid_t ppid = getpid(); + pid_t pid; + + act.sa_handler = signal_handler; + act.sa_flags = 0; + sigemptyset(&act.sa_mask); + if (sigaction(SIGUSR1, &act, NULL) < 0) { + perror("sigaction SIGUSR1"); + exit(1); + } + if (sigaction(SIGALRM, &act, NULL) < 0) { + perror("sigaction SIGALRM"); + exit(1); + } + + /* Don't do this for MAX_ATTEMPT, its simply too long */ + for(i = 0; i < 1000; i++) { + pid = fork(); + if (pid == -1) { + perror("fork"); + exit(1); + } + if (pid == 0) { + signal_self(ppid, SIGUSR1); + exit(1); + } else { + alarm(0); /* Disable any pending */ + alarm(2); + while (!signaled && !fail) + asm volatile("": : :"memory"); + if (!signaled) { + fprintf(stderr, "Didn't get signal from child\n"); + FAIL_IF(1); /* For the line number */ + } + /* Otherwise we'll loop too fast and fork() will eventually fail */ + waitpid(pid, NULL, 0); + } + } + + for (i = 0; i < MAX_ATTEMPT; i++) { + long rc; + + alarm(0); /* Disable any pending */ + signaled = 0; + alarm(TIMEOUT); + rc = signal_self(ppid, SIGUSR1); + if (rc) { + fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx", + i, fail, rc); + FAIL_IF(1); /* For the line number */ + } + while (!signaled && !fail) + asm volatile("": : :"memory"); + if (!signaled) { + fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx", + i, fail, rc); + FAIL_IF(1); /* For the line number */ + } + } + + return 0; +} + +int main(void) +{ + test_harness_set_timeout(300); + return test_harness(test_signal, "signal"); +} |