| 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(fiber: orig_fiber, flags: __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(flags: 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, flags: __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, format: "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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| 38 | |
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