You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65 lines
1.5 KiB
65 lines
1.5 KiB
// Check that if LSan finds that SP doesn't point into thread stack (e.g.
|
|
// if swapcontext is used), LSan will not hit the guard page.
|
|
// RUN: %clang_lsan %s -o %t && %run %t
|
|
// Missing 'getcontext' and 'makecontext' on Android.
|
|
// UNSUPPORTED: android
|
|
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <pthread.h>
|
|
#include <ucontext.h>
|
|
|
|
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
|
|
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
int ctxfunc_started = 0;
|
|
|
|
static void die(const char* msg, int err) {
|
|
if (err == 0)
|
|
err = errno;
|
|
fprintf(stderr, "%s: %s\n", msg, strerror(err));
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
static void ctxfunc() {
|
|
pthread_mutex_lock(&mutex);
|
|
ctxfunc_started = 1;
|
|
// printf("ctxfunc\n");
|
|
pthread_cond_signal(&cond);
|
|
pthread_mutex_unlock(&mutex);
|
|
// Leave this context alive when the program exits.
|
|
for (;;);
|
|
}
|
|
|
|
static void* thread(void* arg) {
|
|
(void)arg;
|
|
ucontext_t ctx;
|
|
void* stack;
|
|
|
|
if (getcontext(&ctx) < 0)
|
|
die("getcontext", 0);
|
|
stack = malloc(1 << 12);
|
|
if (stack == NULL)
|
|
die("malloc", 0);
|
|
ctx.uc_stack.ss_sp = stack;
|
|
ctx.uc_stack.ss_size = 1 << 12;
|
|
makecontext(&ctx, ctxfunc, 0);
|
|
setcontext(&ctx);
|
|
die("setcontext", 0);
|
|
return NULL;
|
|
}
|
|
|
|
int main() {
|
|
pthread_t tid;
|
|
int i;
|
|
|
|
pthread_mutex_lock(&mutex);
|
|
i = pthread_create(&tid, NULL, thread, NULL);
|
|
if (i != 0)
|
|
die("pthread_create", i);
|
|
while (!ctxfunc_started) pthread_cond_wait(&cond, &mutex);
|
|
pthread_mutex_unlock(&mutex);
|
|
return 0;
|
|
}
|