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// RUN: %clangxx_asan %s -pthread -o %t
// RUN: %env_asan_opts=detect_stack_use_after_return=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1
// RUN: %env_asan_opts=detect_stack_use_after_return=0 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK0
// RUN: %clangxx_asan -O3 %s -pthread -o %t
// RUN: %env_asan_opts=detect_stack_use_after_return=1 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1
// RUN: %env_asan_opts=detect_stack_use_after_return=0 %run %t 2>&1 | FileCheck %s --check-prefix=CHECK0
// REQUIRES: stable-runtime
#include <assert.h>
#include <stdio.h>
#include <pthread.h>
#include <sanitizer/asan_interface.h>
static const int kNumThreads = 2;
static const int kLeftRedzoneSize = sizeof(void *) * 4;
void *Thread(void *unused) {
void *fake_stack = __asan_get_current_fake_stack();
char var[15];
if (fake_stack) {
fprintf(stderr, "fake stack found: %p; var: %p\n", fake_stack, var);
// CHECK1: fake stack found
// CHECK1: fake stack found
void *beg, *end;
void *real_stack =
__asan_addr_is_in_fake_stack(fake_stack, &var[0], &beg, &end);
assert(real_stack);
assert((char*)beg <= (char*)&var[0]);
assert((char*)end > (char*)&var[0]);
for (int i = -kLeftRedzoneSize; i < 15; i++) {
void *beg1, *end1;
char *ptr = &var[0] + i;
void *real_stack1 =
__asan_addr_is_in_fake_stack(fake_stack, ptr, &beg1, &end1);
assert(real_stack == real_stack1);
assert(beg == beg1);
assert(end == end1);
}
} else {
fprintf(stderr, "no fake stack\n");
// CHECK0: no fake stack
// CHECK0: no fake stack
}
return NULL;
}
int main(int argc, char **argv) {
pthread_t t[kNumThreads];
for (int i = 0; i < kNumThreads; i++)
pthread_create(&t[i], 0, Thread, 0);
for (int i = 0; i < kNumThreads; i++)
pthread_join(t[i], 0);
return 0;
}
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