69 lines · cpp
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 Bionic4// https://bugs.llvm.org/show_bug.cgi?id=378045// XFAIL: glibc-2.276 7// RUN: %clangxx %s -DBUILD_DSO -fPIC -shared -o %t-so.so8// RUN: %clangxx_lsan %s -o %t9// RUN: %env_lsan_opts="report_objects=1:use_stacks=0:use_registers=0:use_ld_allocations=0:use_tls=0" not %run %t 2>&1 | FileCheck %s10// RUN: %env_lsan_opts="report_objects=1:use_stacks=0:use_registers=0:use_ld_allocations=0:use_tls=1" %run %t 2>&111// RUN: %env_lsan_opts="" %run %t 2>&112// UNSUPPORTED: target={{(arm|powerpc).*}},i386-linux && !android13 14#ifndef BUILD_DSO15#include <assert.h>16#include <dlfcn.h>17#include <stdio.h>18#include <stdlib.h>19#include <string>20#include "sanitizer_common/print_address.h"21 22int main(int argc, char *argv[]) {23 std::string path = std::string(argv[0]) + "-so.so";24 25 // Clear any previous errors. On Android, the dynamic loader can have some26 // left over dlerror() messages due to a missing symbol resolution for a27 // deprecated malloc function.28 dlerror();29 30 void *handle = dlopen(path.c_str(), RTLD_LAZY);31 assert(handle != 0);32 typedef void **(* store_t)(void *p);33 store_t StoreToTLS = (store_t)dlsym(handle, "StoreToTLS");34 35 // Sometimes dlerror() occurs when we broke the interceptors.36 // Add the message here to make the error more obvious.37 const char *dlerror_msg = dlerror();38 if (dlerror_msg != nullptr) {39 fprintf(stderr, "DLERROR: %s\n", dlerror_msg);40 fflush(stderr);41 abort();42 }43 void *p = malloc(1337);44 // If we don't know about dynamic TLS, we will return a false leak above.45 void **p_in_tls = StoreToTLS(p);46 assert(*p_in_tls == p);47 print_address("Test alloc: ", 1, p);48 return 0;49}50// CHECK: Test alloc: [[ADDR:0x[0-9,a-f]+]]51// CHECK: LeakSanitizer: detected memory leaks52// CHECK: [[ADDR]] (1337 bytes)53// CHECK: SUMMARY: {{.*}}Sanitizer:54 55#else // BUILD_DSO56// A loadable module with a large thread local section, which would require57// allocation of a new TLS storage chunk when loaded with dlopen(). We use it58// to test the reachability of such chunks in LSan tests.59 60// This must be large enough that it doesn't fit into preallocated static TLS61// space (see STATIC_TLS_SURPLUS in glibc).62__thread void *huge_thread_local_array[(1 << 20) / sizeof(void *)];63 64extern "C" void **StoreToTLS(void *p) {65 huge_thread_local_array[0] = p;66 return &huge_thread_local_array[0];67}68#endif // BUILD_DSO69