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