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150
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1 // RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s
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2 // UNSUPPORTED: tvos, watchos
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3 // XFAIL: ios && !iossim
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4 #include "sanitizer_common/sanitizer_ucontext.h"
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5 #include "test.h"
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6
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7 char stack[64 * 1024] __attribute__((aligned(16)));
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8
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9 ucontext_t uc, orig_uc;
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10 void *fiber, *orig_fiber;
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11
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12 int var;
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13
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14 void func() {
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15 var = 1;
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16 __tsan_switch_to_fiber(orig_fiber, __tsan_switch_to_fiber_no_sync);
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17 swapcontext(&uc, &orig_uc);
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18 }
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19
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20 int main() {
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21 orig_fiber = __tsan_get_current_fiber();
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22 fiber = __tsan_create_fiber(0);
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23 getcontext(&uc);
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24 uc.uc_stack.ss_sp = stack;
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25 uc.uc_stack.ss_size = sizeof(stack);
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26 uc.uc_link = 0;
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27 makecontext(&uc, func, 0);
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28 var = 2;
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29 __tsan_switch_to_fiber(fiber, __tsan_switch_to_fiber_no_sync);
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30 swapcontext(&orig_uc, &uc);
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31 __tsan_destroy_fiber(fiber);
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32 fprintf(stderr, "PASS\n");
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33 return 0;
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34 }
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35
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36 // CHECK: WARNING: ThreadSanitizer: data race
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37 // CHECK: PASS
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