| // RUN: %clangxx_tsan -O1 %s -o %t -DORDER1 && %deflake %run %t | FileCheck %s |
| // RUN: %clangxx_tsan -O1 %s -o %t -DORDER2 && %deflake %run %t | FileCheck %s |
| #include "test.h" |
| |
| volatile int X; |
| volatile int N; |
| void (*volatile F)(); |
| |
| static void foo() { |
| if (--N == 0) |
| X = 42; |
| else |
| F(); |
| } |
| |
| void *Thread(void *p) { |
| #ifdef ORDER1 |
| barrier_wait(&barrier); |
| #endif |
| F(); |
| #ifdef ORDER2 |
| barrier_wait(&barrier); |
| #endif |
| return 0; |
| } |
| |
| static size_t RoundUp(size_t n, size_t to) { |
| return ((n + to - 1) / to) * to; |
| } |
| |
| int main() { |
| barrier_init(&barrier, 2); |
| N = 50000; |
| F = foo; |
| pthread_t t; |
| pthread_attr_t a; |
| pthread_attr_init(&a); |
| size_t stack_size = N * 256 + (1 << 20); |
| stack_size = RoundUp(stack_size, 0x10000); // round the stack size to 64k |
| int ret = pthread_attr_setstacksize(&a, stack_size); |
| if (ret) abort(); |
| pthread_create(&t, &a, Thread, 0); |
| #ifdef ORDER2 |
| barrier_wait(&barrier); |
| #endif |
| X = 43; |
| #ifdef ORDER1 |
| barrier_wait(&barrier); |
| #endif |
| |
| pthread_join(t, 0); |
| } |
| |
| // CHECK: WARNING: ThreadSanitizer: data race |
| // CHECK: #100 foo |
| // We must output sufficiently large stack (at least 100 frames) |
| |