| 1 | // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t 2>&1 | FileCheck %s |
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| 2 | #include "../test.h" |
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| 3 | #include <memory.h> |
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| 4 | |
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| 5 | // A reproducer for a known issue. |
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| 6 | // See reference to double_race.cpp in tsan_rtl_report.cpp for an explanation. |
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| 7 | |
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| 8 | long long buf[2]; |
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| 9 | volatile int nreport; |
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| 10 | |
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| 11 | __attribute__((disable_sanitizer_instrumentation)) void |
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| 12 | __sanitizer_report_error_summary(const char *summary) { |
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| 13 | nreport++; |
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| 14 | } |
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| 15 | |
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| 16 | const int kEventPCBits = 61; |
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| 17 | |
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| 18 | extern "C" __attribute__((disable_sanitizer_instrumentation)) bool |
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| 19 | __tsan_symbolize_external(unsigned long pc, char *func_buf, |
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| 20 | unsigned long func_siz, char *file_buf, |
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| 21 | unsigned long file_siz, int *line, int *col) { |
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| 22 | if (pc >> kEventPCBits) { |
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| 23 | printf(format: "bad PC passed to __tsan_symbolize_external: %lx\n" , pc); |
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| 24 | _exit(status: 1); |
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| 25 | } |
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| 26 | return true; |
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| 27 | } |
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| 28 | |
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| 29 | void *Thread(void *arg) { |
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| 30 | barrier_wait(barrier: &barrier); |
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| 31 | memset(s: buf, c: 2, n: sizeof(buf)); |
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| 32 | return 0; |
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| 33 | } |
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| 34 | |
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| 35 | int main() { |
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| 36 | barrier_init(barrier: &barrier, count: 2); |
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| 37 | pthread_t t; |
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| 38 | pthread_create(newthread: &t, attr: 0, start_routine: Thread, arg: 0); |
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| 39 | memset(s: buf, c: 1, n: sizeof(buf)); |
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| 40 | barrier_wait(barrier: &barrier); |
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| 41 | pthread_join(th: t, thread_return: 0); |
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| 42 | return 0; |
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| 43 | } |
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| 44 | |
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| 45 | // CHECK: WARNING: ThreadSanitizer: data race |
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| 46 | // CHECK: Write of size 8 at {{.*}} by thread T1: |
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| 47 | // CHECK: #0 {{.*}}memset |
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| 48 | // CHECK: #{{[12]}} Thread |
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| 49 | // CHECK-NOT: bad PC passed to __tsan_symbolize_external |
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| 50 | // CHECK-NOT: __sanitizer_report_error_summary |
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| 51 | // CHECK-NOT: WARNING: ThreadSanitizer: data race |
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| 52 | |
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