forked from OSchip/llvm-project
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
|
// 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
|