58 lines · cpp
1// RUN: %clangxx_tsan -O1 %s -o %t -DORDER1 && %deflake %run %t | FileCheck %s2// RUN: %clangxx_tsan -O1 %s -o %t -DORDER2 && %deflake %run %t | FileCheck %s3#include "test.h"4 5volatile int X;6volatile int N;7void (*volatile F)();8 9static void foo() {10 if (--N == 0)11 X = 42;12 else13 F();14}15 16void *Thread(void *p) {17#ifdef ORDER118 barrier_wait(&barrier);19#endif20 F();21#ifdef ORDER222 barrier_wait(&barrier);23#endif24 return 0;25}26 27static size_t RoundUp(size_t n, size_t to) {28 return ((n + to - 1) / to) * to;29}30 31int main() {32 barrier_init(&barrier, 2);33 N = 50000;34 F = foo;35 pthread_t t;36 pthread_attr_t a;37 pthread_attr_init(&a);38 size_t stack_size = N * 256 + (1 << 20);39 stack_size = RoundUp(stack_size, 0x10000); // round the stack size to 64k40 int ret = pthread_attr_setstacksize(&a, stack_size);41 if (ret) abort();42 pthread_create(&t, &a, Thread, 0);43#ifdef ORDER244 barrier_wait(&barrier);45#endif46 X = 43;47#ifdef ORDER148 barrier_wait(&barrier);49#endif50 51 pthread_join(t, 0);52}53 54// CHECK: WARNING: ThreadSanitizer: data race55// CHECK: #100 foo56// We must output sufficiently large stack (at least 100 frames)57 58