+++ /dev/null
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Test installing a signal handler before the Go code starts.
-// This is a lot like misc/cgo/testcshared/main4.c.
-
-#include <setjmp.h>
-#include <signal.h>
-#include <stdarg.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <sched.h>
-#include <time.h>
-#include <errno.h>
-
-#include "libgo2.h"
-
-static void die(const char* msg) {
- perror(msg);
- exit(EXIT_FAILURE);
-}
-
-static volatile sig_atomic_t sigioSeen;
-static volatile sig_atomic_t sigpipeSeen;
-
-// Use up some stack space.
-static void recur(int i, char *p) {
- char a[1024];
-
- *p = '\0';
- if (i > 0) {
- recur(i - 1, a);
- }
-}
-
-static void pipeHandler(int signo, siginfo_t* info, void* ctxt) {
- sigpipeSeen = 1;
-}
-
-// Signal handler that uses up more stack space than a goroutine will have.
-static void ioHandler(int signo, siginfo_t* info, void* ctxt) {
- char a[1024];
-
- recur(4, a);
- sigioSeen = 1;
-}
-
-static jmp_buf jmp;
-static char* nullPointer;
-
-// An arbitrary function which requires proper stack alignment; see
-// http://golang.org/issue/17641.
-static void callWithVarargs(void* dummy, ...) {
- va_list args;
- va_start(args, dummy);
- va_end(args);
-}
-
-// Signal handler for SIGSEGV on a C thread.
-static void segvHandler(int signo, siginfo_t* info, void* ctxt) {
- sigset_t mask;
- int i;
-
- // Call an arbitrary function that requires the stack to be properly aligned.
- callWithVarargs("dummy arg", 3.1415);
-
- if (sigemptyset(&mask) < 0) {
- die("sigemptyset");
- }
- if (sigaddset(&mask, SIGSEGV) < 0) {
- die("sigaddset");
- }
- i = sigprocmask(SIG_UNBLOCK, &mask, NULL);
- if (i != 0) {
- fprintf(stderr, "sigprocmask: %s\n", strerror(i));
- exit(EXIT_FAILURE);
- }
-
- // Don't try this at home.
- longjmp(jmp, signo);
-
- // We should never get here.
- abort();
-}
-
-// Set up the signal handlers in a high priority constructor,
-// so that they are installed before the Go code starts.
-
-static void init(void) __attribute__ ((constructor (200)));
-
-static void init() {
- struct sigaction sa;
-
- memset(&sa, 0, sizeof sa);
- sa.sa_sigaction = ioHandler;
- if (sigemptyset(&sa.sa_mask) < 0) {
- die("sigemptyset");
- }
- sa.sa_flags = SA_SIGINFO;
- if (sigaction(SIGIO, &sa, NULL) < 0) {
- die("sigaction");
- }
-
- sa.sa_sigaction = segvHandler;
- if (sigaction(SIGSEGV, &sa, NULL) < 0 || sigaction(SIGBUS, &sa, NULL) < 0) {
- die("sigaction");
- }
-
- sa.sa_sigaction = pipeHandler;
- if (sigaction(SIGPIPE, &sa, NULL) < 0) {
- die("sigaction");
- }
-}
-
-int main(int argc, char** argv) {
- int verbose;
- sigset_t mask;
- int i;
- struct timespec ts;
- int darwin;
-
- darwin = atoi(argv[1]);
-
- verbose = argc > 2;
-
- setvbuf(stdout, NULL, _IONBF, 0);
-
- // Call setsid so that we can use kill(0, SIGIO) below.
- // Don't check the return value so that this works both from
- // a job control shell and from a shell script.
- setsid();
-
- if (verbose) {
- printf("calling RunGoroutines\n");
- }
-
- RunGoroutines();
-
- // Block SIGIO in this thread to make it more likely that it
- // will be delivered to a goroutine.
-
- if (verbose) {
- printf("calling pthread_sigmask\n");
- }
-
- if (sigemptyset(&mask) < 0) {
- die("sigemptyset");
- }
- if (sigaddset(&mask, SIGIO) < 0) {
- die("sigaddset");
- }
- i = pthread_sigmask(SIG_BLOCK, &mask, NULL);
- if (i != 0) {
- fprintf(stderr, "pthread_sigmask: %s\n", strerror(i));
- exit(EXIT_FAILURE);
- }
-
- if (verbose) {
- printf("calling kill\n");
- }
-
- if (kill(0, SIGIO) < 0) {
- die("kill");
- }
-
- if (verbose) {
- printf("waiting for sigioSeen\n");
- }
-
- // Wait until the signal has been delivered.
- i = 0;
- while (!sigioSeen) {
- ts.tv_sec = 0;
- ts.tv_nsec = 1000000;
- nanosleep(&ts, NULL);
- i++;
- if (i > 5000) {
- fprintf(stderr, "looping too long waiting for SIGIO\n");
- exit(EXIT_FAILURE);
- }
- }
-
- if (verbose) {
- printf("provoking SIGPIPE\n");
- }
-
- // SIGPIPE is never forwarded on Darwin, see golang.org/issue/33384.
- if (!darwin) {
- GoRaiseSIGPIPE();
-
- if (verbose) {
- printf("waiting for sigpipeSeen\n");
- }
-
- // Wait until the signal has been delivered.
- i = 0;
- while (!sigpipeSeen) {
- ts.tv_sec = 0;
- ts.tv_nsec = 1000000;
- nanosleep(&ts, NULL);
- i++;
- if (i > 5000) {
- fprintf(stderr, "looping too long waiting for SIGPIPE\n");
- exit(EXIT_FAILURE);
- }
- }
- }
-
- if (verbose) {
- printf("calling setjmp\n");
- }
-
- // Test that a SIGSEGV on this thread is delivered to us.
- if (setjmp(jmp) == 0) {
- if (verbose) {
- printf("triggering SIGSEGV\n");
- }
-
- *nullPointer = '\0';
-
- fprintf(stderr, "continued after address error\n");
- exit(EXIT_FAILURE);
- }
-
- if (verbose) {
- printf("calling TestSEGV\n");
- }
-
- TestSEGV();
-
- printf("PASS\n");
- return 0;
-}