llvm-project

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// RUN: rm -rf %t-dir
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// RUN: mkdir %t-dir
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// RUN: %clangxx_tsan -O1 %s -o %t-dir/global_race.cpp.exe && %deflake %run %t-dir/global_race.cpp.exe 2>&1 \
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// RUN:   | FileCheck %s
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// Also check that memory access instrumentation can be configured by either
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// driver or legacy flags:
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// RUN: %clangxx_tsan -O1 %s -o %t-dir/global_race.cpp.exe -fno-sanitize-thread-memory-access && not %deflake %run %t-dir/global_race.cpp.exe 2>&1 \
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// RUN:   | FileCheck --allow-empty --check-prefix=CHECK-MEMORY-ACCESS-OFF %s
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// RUN: %clangxx_tsan -O1 %s -o %t-dir/global_race.cpp.exe -mllvm -tsan-instrument-memory-accesses=0 && not %deflake %run %t-dir/global_race.cpp.exe 2>&1 \
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// RUN:   | FileCheck --allow-empty --check-prefix=CHECK-MEMORY-ACCESS-OFF %s
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#include "test.h"
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int GlobalData[10];
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void *Thread(void *a) {
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  barrier_wait(&barrier);
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  GlobalData[2] = 42;
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  return 0;
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}
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int main() {
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  barrier_init(&barrier, 2);
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  print_address("addr=", 1, GlobalData);
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  pthread_t t;
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  pthread_create(&t, 0, Thread, 0);
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  GlobalData[2] = 43;
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  barrier_wait(&barrier);
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  pthread_join(t, 0);
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}
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// CHECK: addr=[[ADDR:0x[0-9,a-f]+]]
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK: Location is global 'GlobalData' {{(of size 40 )?}}at [[ADDR]] (global_race.cpp.exe+0x{{[0-9,a-f]+}})
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// CHECK-MEMORY-ACCESS-OFF-NOT: WARNING: ThreadSanitizer: data race
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