1 //=-- lsan.cc -------------------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file is a part of LeakSanitizer.
11 // Standalone LSan RTL.
13 //===----------------------------------------------------------------------===//
17 #include "sanitizer_common/sanitizer_flags.h"
18 #include "sanitizer_common/sanitizer_flag_parser.h"
19 #include "sanitizer_common/sanitizer_stacktrace.h"
20 #include "lsan_allocator.h"
21 #include "lsan_common.h"
22 #include "lsan_thread.h"
25 bool lsan_init_is_running;
29 ///// Interface to the common LSan module. /////
30 bool WordIsPoisoned(uptr addr) {
36 using namespace __lsan; // NOLINT
38 static void InitializeFlags() {
39 // Set all the default values.
40 SetCommonFlagsDefaults();
43 cf.CopyFrom(*common_flags());
44 cf.external_symbolizer_path = GetEnv("LSAN_SYMBOLIZER_PATH");
45 cf.malloc_context_size = 30;
46 cf.intercept_tls_get_addr = true;
47 cf.detect_leaks = true;
49 OverrideCommonFlags(cf);
56 RegisterLsanFlags(&parser, f);
57 RegisterCommonFlags(&parser);
59 // Override from user-specified string.
60 const char *lsan_default_options = MaybeCallLsanDefaultOptions();
61 parser.ParseString(lsan_default_options);
62 parser.ParseString(GetEnv("LSAN_OPTIONS"));
64 SetVerbosity(common_flags()->verbosity);
66 if (Verbosity()) ReportUnrecognizedFlags();
68 if (common_flags()->help) parser.PrintFlagDescriptions();
71 static void OnStackUnwind(const SignalContext &sig, const void *,
72 BufferedStackTrace *stack) {
73 GetStackTrace(stack, kStackTraceMax, sig.pc, sig.bp, sig.context,
74 common_flags()->fast_unwind_on_fatal);
77 static void LsanOnDeadlySignal(int signo, void *siginfo, void *context) {
78 HandleDeadlySignal(siginfo, context, GetCurrentThread(), &OnStackUnwind,
82 extern "C" void __lsan_init() {
83 CHECK(!lsan_init_is_running);
86 lsan_init_is_running = true;
87 SanitizerToolName = "LeakSanitizer";
92 InitializeAllocator();
93 ReplaceSystemMalloc();
95 InitializeInterceptors();
96 InitializeThreadRegistry();
97 InstallDeadlySignalHandlers(LsanOnDeadlySignal);
98 u32 tid = ThreadCreate(0, 0, true);
100 ThreadStart(tid, GetTid());
101 SetCurrentThread(tid);
103 if (common_flags()->detect_leaks && common_flags()->leak_check_at_exit)
106 InitializeCoverage(common_flags()->coverage, common_flags()->coverage_dir);
109 lsan_init_is_running = false;
112 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
113 void __sanitizer_print_stack_trace() {
114 GET_STACK_TRACE_FATAL;