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f831d6fc80
FdClose is a subjet to the same atomicity problem as MemoryRangeFreed (memory state is not "monotoic" wrt race detection). So we need to lock the thread slot in FdClose the same way we do in MemoryRangeFreed. This fixes the modified stress.cpp test. Reviewed By: vitalybuka, melver Differential Revision: https://reviews.llvm.org/D121143
27 lines
573 B
C++
27 lines
573 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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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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void *Thread(void *arg) {
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char buf;
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read((long)arg, &buf, 1);
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barrier_wait(&barrier);
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return NULL;
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}
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int main() {
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barrier_init(&barrier, 2);
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int fd = open("/dev/random", O_RDONLY);
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pthread_t t;
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pthread_create(&t, NULL, Thread, (void *)(long)fd);
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barrier_wait(&barrier);
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close(fd);
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pthread_join(t, NULL);
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fprintf(stderr, "DONE\n");
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}
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// CHECK: WARNING: ThreadSanitizer: data race
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// CHECK: DONE
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