| 1 | // RUN: %clangxx_tsan -O1 %s -o %t -DORDER1 && %deflake %run %t | FileCheck %s |
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| 2 | // RUN: %clangxx_tsan -O1 %s -o %t -DORDER2 && %deflake %run %t | FileCheck %s |
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| 3 | #include "test.h" |
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| 4 | |
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| 5 | volatile int X; |
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| 6 | volatile int N; |
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| 7 | void (*volatile F)(); |
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| 8 | |
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| 9 | static void foo() { |
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| 10 | if (--N == 0) |
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| 11 | X = 42; |
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| 12 | else |
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| 13 | F(); |
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| 14 | } |
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| 15 | |
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| 16 | void *Thread(void *p) { |
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| 17 | #ifdef ORDER1 |
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| 18 | barrier_wait(&barrier); |
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| 19 | #endif |
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| 20 | F(); |
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| 21 | #ifdef ORDER2 |
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| 22 | barrier_wait(&barrier); |
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| 23 | #endif |
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| 24 | return 0; |
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| 25 | } |
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| 26 | |
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| 27 | static size_t RoundUp(size_t n, size_t to) { |
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| 28 | return ((n + to - 1) / to) * to; |
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| 29 | } |
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| 30 | |
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| 31 | int main() { |
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| 32 | barrier_init(barrier: &barrier, count: 2); |
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| 33 | N = 50000; |
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| 34 | F = foo; |
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| 35 | pthread_t t; |
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| 36 | pthread_attr_t a; |
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| 37 | pthread_attr_init(attr: &a); |
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| 38 | size_t stack_size = N * 256 + (1 << 20); |
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| 39 | stack_size = RoundUp(n: stack_size, to: 0x10000); // round the stack size to 64k |
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| 40 | int ret = pthread_attr_setstacksize(attr: &a, stacksize: stack_size); |
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| 41 | if (ret) abort(); |
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| 42 | pthread_create(newthread: &t, attr: &a, start_routine: Thread, arg: 0); |
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| 43 | #ifdef ORDER2 |
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| 44 | barrier_wait(&barrier); |
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| 45 | #endif |
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| 46 | X = 43; |
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| 47 | #ifdef ORDER1 |
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| 48 | barrier_wait(&barrier); |
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| 49 | #endif |
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| 50 | |
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| 51 | pthread_join(th: t, thread_return: 0); |
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| 52 | } |
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| 53 | |
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| 54 | // CHECK: WARNING: ThreadSanitizer: data race |
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| 55 | // CHECK: #100 foo |
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| 56 | // We must output sufficiently large stack (at least 100 frames) |
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| 57 | |
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| 58 | |
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