129 lines
2.2 KiB
Bash
Executable File
129 lines
2.2 KiB
Bash
Executable File
#!/bin/sh
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# sigaltstack(2) regression test by Steven Hartland <killing@multiplay.co.uk>
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# Wrong altsigstack clearing on exec
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# https://github.com/golang/go/issues/15658#issuecomment-287276856
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# Fixed by r315453
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cd /tmp
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cat > test-sigs.c <<EOF
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#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <time.h>
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#include <pthread.h>
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extern char **environ;
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static void
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die(const char *s)
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{
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perror(s);
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exit(EXIT_FAILURE);
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}
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static void
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setstack(void *arg __unused)
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{
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stack_t ss;
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ss.ss_sp = malloc(SIGSTKSZ);
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if (ss.ss_sp == NULL)
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die("malloc");
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ss.ss_size = SIGSTKSZ;
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ss.ss_flags = 0;
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if (sigaltstack(&ss, NULL) < 0)
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die("sigaltstack set");
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}
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static void *
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thread_exec(void *arg)
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{
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struct timespec ts = {0, 1000};
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char *argv[] = {"./test-sigs", "no-more", 0};
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setstack(arg);
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nanosleep(&ts, NULL);
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execve(argv[0], &argv[0], environ);
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die("exec failed");
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return NULL;
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}
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static void *
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thread_sleep(void *arg __unused)
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{
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sleep(10);
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return NULL;
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}
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int
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main(int argc, char** argv __unused)
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{
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int j;
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pthread_t tid1, tid2;
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if (argc != 1) {
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stack_t ss;
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if (sigaltstack(NULL, &ss) < 0)
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die("sigaltstack get");
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if (ss.ss_sp != NULL || ss.ss_flags != SS_DISABLE ||
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ss.ss_size != 0) {
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fprintf(stderr, "invalid signal stack after execve: "
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"ss_sp=%p ss_size=%lu ss_flags=0x%x\n", ss.ss_sp,
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(unsigned long)ss.ss_size,
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(unsigned int)ss.ss_flags);
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return 1;
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}
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printf("valid signal stack is valid after execve\n");
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return 0;
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}
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// We have to use two threads to ensure that can detect the
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// issue when new threads are added to the head (pre 269095)
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// and the tail of the process thread list.
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j = pthread_create(&tid1, NULL, thread_exec, NULL);
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if (j != 0) {
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errno = j;
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die("pthread_create");
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}
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j = pthread_create(&tid2, NULL, thread_sleep, NULL);
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if (j != 0) {
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errno = j;
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die("pthread_create");
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}
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j = pthread_join(tid1, NULL);
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if (j != 0) {
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errno = j;
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die("pthread_join");
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}
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j = pthread_join(tid2, NULL);
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if (j != 0) {
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errno = j;
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}
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return 0;
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}
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EOF
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cc -o test-sigs -Wall -Wextra -O2 -g test-sigs.c -lpthread || exit 1
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./test-sigs
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s=$?
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rm -f test-sigs test-sigs.c
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exit $s
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