1// RUN: %clang -g %s -o %t
2// RUN: %clang -g %s -DBUILD_SO -fPIC -o %t-so.so -shared
3// RUN: %run %t 2>&1 | FileCheck %s
4
5// REQUIRES: glibc
6
7// `__tls_get_addr` is somehow not invoked.
8// XFAIL: i386-linux
9
10// These don't intercept __tls_get_addr.
11// XFAIL: lsan,hwasan,ubsan
12
13// FIXME: Fails for unknown reasons.
14// UNSUPPORTED: powerpc64le-target-arch
15
16#ifndef BUILD_SO
17# include <assert.h>
18# include <dlfcn.h>
19# include <pthread.h>
20# include <stdio.h>
21# include <stdlib.h>
22
23// CHECK-COUNT-2: __sanitizer_get_dtls_size:
24size_t __sanitizer_get_dtls_size(const void *ptr)
25 __attribute__((disable_sanitizer_instrumentation)) {
26 fprintf(stderr, format: "__sanitizer_get_dtls_size: %p\n", ptr);
27 return 0;
28}
29
30typedef long *(*get_t)();
31get_t GetTls;
32void *Thread(void *unused) { return GetTls(); }
33
34int main(int argc, char *argv[]) {
35 char path[4096];
36 snprintf(s: path, maxlen: sizeof(path), format: "%s-so.so", argv[0]);
37 int i;
38
39 void *handle = dlopen(file: path, RTLD_LAZY);
40 if (!handle)
41 fprintf(stderr, format: "%s\n", dlerror());
42 assert(handle != 0);
43 GetTls = (get_t)dlsym(handle: handle, name: "GetTls");
44 assert(dlerror() == 0);
45
46 pthread_t t;
47 pthread_create(newthread: &t, attr: 0, start_routine: Thread, arg: 0);
48 pthread_join(th: t, thread_return: 0);
49 pthread_create(newthread: &t, attr: 0, start_routine: Thread, arg: 0);
50 pthread_join(th: t, thread_return: 0);
51 return 0;
52}
53#else // BUILD_SO
54__thread long huge_thread_local_array[1 << 17];
55long *GetTls() { return &huge_thread_local_array[0]; }
56#endif
57

source code of compiler-rt/test/sanitizer_common/TestCases/Linux/tls_get_addr.c