forked from OSchip/llvm-project
43 lines
721 B
C++
43 lines
721 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
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#include "test.h"
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volatile long X;
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volatile long Y;
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volatile int N1 = 2 << 10;
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volatile int N2 = 32 << 10;
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void (*volatile F)();
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void (*volatile G)();
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static void foo() {
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if (--N1)
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return F();
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while (--N2)
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G();
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}
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static void bar() { Y++; }
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void *Thread(void *p) {
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F();
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X = 43;
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barrier_wait(&barrier);
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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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F = foo;
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G = bar;
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pthread_t t;
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pthread_create(&t, 0, Thread, 0);
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barrier_wait(&barrier);
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X = 43;
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pthread_join(t, 0);
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}
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK: Write
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// CHECK: #0 main
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// CHECK: Previous write
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// CHECK: #0 Thread
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