3ab6b2347e
Even sleep(1) lead to episodical flakes on some machines. Use an invisible by tsan barrier to enforce required execution order instead. This makes the tests deterministic and faster. llvm-svn: 226659
51 lines
920 B
C++
51 lines
920 B
C++
// RUN: %clangxx_tsan -O1 %s -o %t -DORDER1 && %deflake %run %t | FileCheck %s
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// RUN: %clangxx_tsan -O1 %s -o %t -DORDER2 && %deflake %run %t | FileCheck %s
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#include "test.h"
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volatile int X;
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volatile int N;
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void (*volatile F)();
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static void foo() {
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if (--N == 0)
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X = 42;
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else
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F();
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}
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void *Thread(void *p) {
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#ifdef ORDER1
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barrier_wait(&barrier);
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#endif
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F();
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#ifdef ORDER2
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barrier_wait(&barrier);
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#endif
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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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N = 50000;
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F = foo;
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pthread_t t;
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pthread_attr_t a;
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pthread_attr_init(&a);
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pthread_attr_setstacksize(&a, N * 256 + (1 << 20));
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pthread_create(&t, &a, Thread, 0);
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#ifdef ORDER2
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barrier_wait(&barrier);
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#endif
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X = 43;
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#ifdef ORDER1
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barrier_wait(&barrier);
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#endif
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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: #100 foo
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// We must output suffucuently large stack (at least 100 frames)
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