1 // Test that dynamically allocated TLS space is included in the root set. 2 3 // This is known to be broken with glibc-2.27+ but it should pass with Bionic 4 // https://bugs.llvm.org/show_bug.cgi?id=37804 5 // XFAIL: glibc-2.27 6 7 // RUN: LSAN_BASE="report_objects=1:use_stacks=0:use_registers=0:use_ld_allocations=0" 8 // RUN: %clangxx %s -DBUILD_DSO -fPIC -shared -o %t-so.so 9 // RUN: %clangxx_lsan %s -o %t 10 // RUN: %env_lsan_opts=$LSAN_BASE:"use_tls=0" not %run %t 2>&1 | FileCheck %s 11 // RUN: %env_lsan_opts=$LSAN_BASE:"use_tls=1" %run %t 2>&1 12 // RUN: %env_lsan_opts="" %run %t 2>&1 13 // UNSUPPORTED: arm,powerpc,i386-linux && !android 14 15 #ifndef BUILD_DSO 16 #include <assert.h> 17 #include <dlfcn.h> 18 #include <stdio.h> 19 #include <stdlib.h> 20 #include <string> 21 #include "sanitizer_common/print_address.h" 22 23 int main(int argc, char *argv[]) { 24 std::string path = std::string(argv[0]) + "-so.so"; 25 26 // Clear any previous errors. On Android, the dynamic loader can have some 27 // left over dlerror() messages due to a missing symbol resolution for a 28 // deprecated malloc function. 29 dlerror(); 30 31 void *handle = dlopen(path.c_str(), RTLD_LAZY); 32 assert(handle != 0); 33 typedef void **(* store_t)(void *p); 34 store_t StoreToTLS = (store_t)dlsym(handle, "StoreToTLS"); 35 36 // Sometimes dlerror() occurs when we broke the interceptors. 37 // Add the message here to make the error more obvious. 38 const char *dlerror_msg = dlerror(); 39 if (dlerror_msg != nullptr) { 40 fprintf(stderr, "DLERROR: %s\n", dlerror_msg); 41 fflush(stderr); 42 abort(); 43 } 44 void *p = malloc(1337); 45 // If we don't know about dynamic TLS, we will return a false leak above. 46 void **p_in_tls = StoreToTLS(p); 47 assert(*p_in_tls == p); 48 print_address("Test alloc: ", 1, p); 49 return 0; 50 } 51 // CHECK: Test alloc: [[ADDR:0x[0-9,a-f]+]] 52 // CHECK: LeakSanitizer: detected memory leaks 53 // CHECK: [[ADDR]] (1337 bytes) 54 // CHECK: SUMMARY: {{(Leak|Address)}}Sanitizer: 55 56 #else // BUILD_DSO 57 // A loadable module with a large thread local section, which would require 58 // allocation of a new TLS storage chunk when loaded with dlopen(). We use it 59 // to test the reachability of such chunks in LSan tests. 60 61 // This must be large enough that it doesn't fit into preallocated static TLS 62 // space (see STATIC_TLS_SURPLUS in glibc). 63 __thread void *huge_thread_local_array[(1 << 20) / sizeof(void *)]; 64 65 extern "C" void **StoreToTLS(void *p) { 66 huge_thread_local_array[0] = p; 67 return &huge_thread_local_array[0]; 68 } 69 #endif // BUILD_DSO 70