diff options
Diffstat (limited to 'test/lsan/TestCases/Linux/use_tls_dynamic.cc')
-rw-r--r-- | test/lsan/TestCases/Linux/use_tls_dynamic.cc | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/test/lsan/TestCases/Linux/use_tls_dynamic.cc b/test/lsan/TestCases/Linux/use_tls_dynamic.cc new file mode 100644 index 000000000..f5df231ba --- /dev/null +++ b/test/lsan/TestCases/Linux/use_tls_dynamic.cc @@ -0,0 +1,52 @@ +// Test that dynamically allocated TLS space is included in the root set. +// RUN: LSAN_BASE="report_objects=1:use_stacks=0:use_registers=0:use_ld_allocations=0" +// RUN: %clangxx %s -DBUILD_DSO -fPIC -shared -o %t-so.so +// RUN: %clangxx_lsan %s -o %t +// RUN: %env_lsan_opts=$LSAN_BASE:"use_tls=0" not %run %t 2>&1 | FileCheck %s +// RUN: %env_lsan_opts=$LSAN_BASE:"use_tls=1" %run %t 2>&1 +// RUN: %env_lsan_opts="" %run %t 2>&1 +// UNSUPPORTED: i386-linux,arm + +#ifndef BUILD_DSO +#include <assert.h> +#include <dlfcn.h> +#include <stdio.h> +#include <stdlib.h> +#include <string> +#include "sanitizer_common/print_address.h" + +int main(int argc, char *argv[]) { + std::string path = std::string(argv[0]) + "-so.so"; + + void *handle = dlopen(path.c_str(), RTLD_LAZY); + assert(handle != 0); + typedef void **(* store_t)(void *p); + store_t StoreToTLS = (store_t)dlsym(handle, "StoreToTLS"); + assert(dlerror() == 0); + + void *p = malloc(1337); + // If we don't know about dynamic TLS, we will return a false leak above. + void **p_in_tls = StoreToTLS(p); + assert(*p_in_tls == p); + print_address("Test alloc: ", 1, p); + return 0; +} +// CHECK: Test alloc: [[ADDR:0x[0-9,a-f]+]] +// CHECK: LeakSanitizer: detected memory leaks +// CHECK: [[ADDR]] (1337 bytes) +// CHECK: SUMMARY: {{(Leak|Address)}}Sanitizer: + +#else // BUILD_DSO +// A loadable module with a large thread local section, which would require +// allocation of a new TLS storage chunk when loaded with dlopen(). We use it +// to test the reachability of such chunks in LSan tests. + +// This must be large enough that it doesn't fit into preallocated static TLS +// space (see STATIC_TLS_SURPLUS in glibc). +__thread void *huge_thread_local_array[(1 << 20) / sizeof(void *)]; // NOLINT + +extern "C" void **StoreToTLS(void *p) { + huge_thread_local_array[0] = p; + return &huge_thread_local_array[0]; +} +#endif // BUILD_DSO |