1// RUN: %clangxx %s -DBUILD_DSO -fPIC -shared -o %t.so
2// RUN: %clangxx --std=c++11 %s -o %t
3// RUN: %env_tool_opts=verbosity=3 %run %t 2>&1 | FileCheck %s
4
5// Does not call __tls_get_addr
6// UNSUPPORTED: i386-linux
7
8// Do not intercept __tls_get_addr
9// UNSUPPORTED: hwasan, lsan, ubsan, android
10
11// FIXME: Investigate
12// UNSUPPORTED: target=powerpc64{{.*}}
13
14// Fails because AArch64 uses TLSDESC instead of __tls_get_addr.
15// UNSUPPORTED: aarch64-target-arch
16
17#include <string.h>
18
19#ifndef BUILD_DSO
20
21#include <assert.h>
22#include <dlfcn.h>
23#include <stdio.h>
24#include <stdlib.h>
25
26char buff[10000];
27
28int main(int argc, char *argv[]) {
29 sprintf(s: buff, format: "rm -f %s.so.*", argv[0]);
30 system(command: buff);
31
32 void *prev_handle = 0;
33 for (int i = 0; i < 600; ++i) {
34 sprintf(s: buff, format: "cp %s.so %s.so.%d", argv[0], argv[0], i);
35 system(command: buff);
36
37 sprintf(s: buff, format: "%s.so.%d", argv[0], i);
38 void *handle = dlopen(file: buff, RTLD_LAZY);
39 assert(handle != 0);
40 assert(handle != prev_handle);
41 prev_handle = handle;
42
43 typedef void (*FnType)(char c);
44 ((FnType)dlsym(handle: handle, name: "StoreToTLS"))(i);
45 }
46 return 0;
47}
48
49#else // BUILD_DSO
50__thread char huge_thread_local_array[1 << 12];
51
52extern "C" void StoreToTLS(char c) {
53 memset(huge_thread_local_array, c, sizeof(huge_thread_local_array));
54}
55#endif // BUILD_DSO
56
57// CHECK: DTLS_Find [[DTLS:0x[a-f0-9]+]] {{[0-9]+}}
58// CHECK: DTLS_NextBlock [[DTLS]] 0
59// CHECK: DTLS_Find [[DTLS:0x[a-f0-9]+]] {{[0-9]+}}
60// CHECK: DTLS_NextBlock [[DTLS]] 1
61

source code of compiler-rt/test/sanitizer_common/TestCases/Linux/resize_tls_dynamic.cpp