1//=-- lsan.cpp ------------------------------------------------------------===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// This file is a part of LeakSanitizer. 10// Standalone LSan RTL. 11// 12//===----------------------------------------------------------------------===// 13 14#include "lsan.h" 15 16#include "lsan_allocator.h" 17#include "lsan_common.h" 18#include "lsan_thread.h" 19#include "sanitizer_common/sanitizer_flag_parser.h" 20#include "sanitizer_common/sanitizer_flags.h" 21#include "sanitizer_common/sanitizer_interface_internal.h" 22 23bool lsan_inited; 24bool lsan_init_is_running; 25 26namespace __lsan { 27 28///// Interface to the common LSan module. ///// 29bool WordIsPoisoned(uptr addr) { 30 return false; 31} 32 33} // namespace __lsan 34 35void __sanitizer::BufferedStackTrace::UnwindImpl( 36 uptr pc, uptr bp, void *context, bool request_fast, u32 max_depth) { 37 using namespace __lsan; 38 uptr stack_top = 0, stack_bottom = 0; 39 if (ThreadContext *t = CurrentThreadContext()) { 40 stack_top = t->stack_end(); 41 stack_bottom = t->stack_begin(); 42 } 43 if (SANITIZER_MIPS && !IsValidFrame(bp, stack_top, stack_bottom)) 44 return; 45 bool fast = StackTrace::WillUseFastUnwind(request_fast); 46 Unwind(max_depth, pc, bp, context, stack_top, stack_bottom, fast); 47} 48 49using namespace __lsan; 50 51static void InitializeFlags() { 52 // Set all the default values. 53 SetCommonFlagsDefaults(); 54 { 55 CommonFlags cf; 56 cf.CopyFrom(*common_flags()); 57 cf.external_symbolizer_path = GetEnv("LSAN_SYMBOLIZER_PATH"); 58 cf.malloc_context_size = 30; 59 cf.intercept_tls_get_addr = true; 60 cf.detect_leaks = true; 61 cf.exitcode = 23; 62 OverrideCommonFlags(cf); 63 } 64 65 Flags *f = flags(); 66 f->SetDefaults(); 67 68 FlagParser parser; 69 RegisterLsanFlags(&parser, f); 70 RegisterCommonFlags(&parser); 71 72 // Override from user-specified string. 73 const char *lsan_default_options = __lsan_default_options(); 74 parser.ParseString(lsan_default_options); 75 parser.ParseStringFromEnv("LSAN_OPTIONS"); 76 77 InitializeCommonFlags(); 78 79 if (Verbosity()) ReportUnrecognizedFlags(); 80 81 if (common_flags()->help) parser.PrintFlagDescriptions(); 82 83 __sanitizer_set_report_path(common_flags()->log_path); 84} 85 86extern "C" void __lsan_init() { 87 CHECK(!lsan_init_is_running); 88 if (lsan_inited) 89 return; 90 lsan_init_is_running = true; 91 SanitizerToolName = "LeakSanitizer"; 92 CacheBinaryName(); 93 AvoidCVE_2016_2143(); 94 InitializeFlags(); 95 InitCommonLsan(); 96 InitializeAllocator(); 97 ReplaceSystemMalloc(); 98 InitTlsSize(); 99 InitializeInterceptors(); 100 InitializeThreadRegistry(); 101 InstallDeadlySignalHandlers(LsanOnDeadlySignal); 102 InitializeMainThread(); 103 InstallAtExitCheckLeaks(); 104 105 InitializeCoverage(common_flags()->coverage, common_flags()->coverage_dir); 106 107 lsan_inited = true; 108 lsan_init_is_running = false; 109} 110 111extern "C" SANITIZER_INTERFACE_ATTRIBUTE 112void __sanitizer_print_stack_trace() { 113 GET_STACK_TRACE_FATAL; 114 stack.Print(); 115} 116