// RUN: %clangxx_tsan -O1 %s -DBUILD_SO -fPIC -shared -o %t-so.so
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// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
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// dl_iterate_phdr doesn't exist on OS X.
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// UNSUPPORTED: darwin
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#ifdef BUILD_SO
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#include "test.h"
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int exported_var = 0;
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#else // BUILD_SO
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#include "test.h"
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#include <dlfcn.h>
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#include <link.h>
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#include <string.h>
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#include <string>
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static int callback(struct dl_phdr_info *info, size_t size, void *data) {
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if (info->dlpi_name[0] == '\0')
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info->dlpi_name = "/proc/self/exe";
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return !strcmp(info->dlpi_name, "non existent module");
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}
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void *thread(void *unused) {
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for (int i = 0; i < 1000; i++) {
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barrier_wait(&barrier);
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dl_iterate_phdr(callback, 0);
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}
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return 0;
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}
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int main(int argc, char *argv[]) {
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barrier_init(&barrier, 2);
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std::string path = std::string(argv[0]) + std::string("-so.so");
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pthread_t th;
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pthread_create(&th, 0, thread, 0);
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for (int i = 0; i < 1000; i++) {
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barrier_wait(&barrier);
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void *lib = dlopen(path.c_str(), RTLD_NOW);
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if (!lib) {
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printf("error in dlopen: %s\n", dlerror());
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return 1;
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}
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dlclose(lib);
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}
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pthread_join(th, 0);
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fprintf(stderr, "DONE\n");
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return 0;
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}
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#endif // BUILD_SO
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// CHECK-NOT: WARNING: ThreadSanitizer: data race
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// CHECK: DONE
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