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// Fails because AArch64 uses TLSDESC instead of __tls_get_addr.
17// UNSUPPORTED: aarch64-target-arch
18
19#ifndef BUILD_SO
20# include <assert.h>
21# include <dlfcn.h>
22# include <pthread.h>
23# include <stdio.h>
24# include <stdlib.h>
25
26// CHECK-COUNT-2: __sanitizer_get_dtls_size:
27size_t __sanitizer_get_dtls_size(const void *ptr)
28 __attribute__((disable_sanitizer_instrumentation)) {
29 fprintf(stderr, format: "__sanitizer_get_dtls_size: %p\n", ptr);
30 return 0;
31}
32
33typedef long *(*get_t)();
34get_t GetTls;
35void *Thread(void *unused) { return GetTls(); }
36
37int main(int argc, char *argv[]) {
38 char path[4096];
39 snprintf(s: path, maxlen: sizeof(path), format: "%s-so.so", argv[0]);
40 int i;
41
42 void *handle = dlopen(file: path, RTLD_LAZY);
43 if (!handle)
44 fprintf(stderr, format: "%s\n", dlerror());
45 assert(handle != 0);
46 GetTls = (get_t)dlsym(handle: handle, name: "GetTls");
47 assert(dlerror() == 0);
48
49 pthread_t t;
50 pthread_create(newthread: &t, attr: 0, start_routine: Thread, arg: 0);
51 pthread_join(th: t, thread_return: 0);
52 pthread_create(newthread: &t, attr: 0, start_routine: Thread, arg: 0);
53 pthread_join(th: t, thread_return: 0);
54 return 0;
55}
56#else // BUILD_SO
57__thread long huge_thread_local_array[1 << 17];
58long *GetTls() { return &huge_thread_local_array[0]; }
59#endif
60

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