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63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
// RUN: %clang_tsan %s -o %t
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// RUN: %clang_tsan %s -DBUILD_SO -fPIC -o %t-so.so -shared
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// RUN: %run %t 2>&1 | FileCheck %s
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// Test that tsan cleans up dynamic TLS memory between reuse.
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#include "test.h"
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#ifndef BUILD_SO
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#include <assert.h>
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#include <dlfcn.h>
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typedef volatile long *(* get_t)();
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get_t GetTls;
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void *Thread1(void *arg) {
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pthread_detach(pthread_self());
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volatile long *x = GetTls();
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*x = 42;
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fprintf(stderr, "stack: %p dtls: %p\n", &x, x);
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barrier_wait(&barrier);
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return 0;
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}
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void *Thread2(void *arg) {
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volatile long *x = GetTls();
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*x = 42;
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fprintf(stderr, "stack: %p dtls: %p\n", &x, x);
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return 0;
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}
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int main(int argc, char *argv[]) {
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char path[4096];
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snprintf(path, sizeof(path), "%s-so.so", argv[0]);
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void *handle = dlopen(path, RTLD_LAZY);
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if (!handle) fprintf(stderr, "%s\n", dlerror());
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assert(handle != 0);
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GetTls = (get_t)dlsym(handle, "GetTls");
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assert(dlerror() == 0);
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barrier_init(&barrier, 2);
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pthread_t t[2];
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pthread_create(&t[0], 0, Thread1, 0);
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barrier_wait(&barrier);
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// Wait for actual thread termination without using pthread_join,
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// which would synchronize threads.
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sleep(1);
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pthread_create(&t[1], 0, Thread2, 0);
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pthread_join(t[1], 0);
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fprintf(stderr, "DONE\n");
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return 0;
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}
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#else // BUILD_SO
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__thread long huge_thread_local_array[1 << 17];
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long *GetTls() {
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return &huge_thread_local_array[0];
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}
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#endif
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// CHECK-NOT: ThreadSanitizer: data race
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// CHECK: DONE
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