1 //=-- lsan.cc -------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file is a part of LeakSanitizer.
11 // Standalone LSan RTL.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "lsan.h"
16 
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"
23 
24 bool lsan_inited;
25 bool lsan_init_is_running;
26 
27 namespace __lsan {
28 
29 ///// Interface to the common LSan module. /////
WordIsPoisoned(uptr addr)30 bool WordIsPoisoned(uptr addr) {
31   return false;
32 }
33 
34 }  // namespace __lsan
35 
36 using namespace __lsan;  // NOLINT
37 
InitializeFlags()38 static void InitializeFlags() {
39   // Set all the default values.
40   SetCommonFlagsDefaults();
41   {
42     CommonFlags cf;
43     cf.CopyFrom(*common_flags());
44     cf.external_symbolizer_path = GetEnv("LSAN_SYMBOLIZER_PATH");
45     cf.malloc_context_size = 30;
46     cf.detect_leaks = true;
47     cf.exitcode = 23;
48     OverrideCommonFlags(cf);
49   }
50 
51   Flags *f = flags();
52   f->SetDefaults();
53 
54   FlagParser parser;
55   RegisterLsanFlags(&parser, f);
56   RegisterCommonFlags(&parser);
57 
58   parser.ParseString(GetEnv("LSAN_OPTIONS"));
59 
60   SetVerbosity(common_flags()->verbosity);
61 
62   if (Verbosity()) ReportUnrecognizedFlags();
63 
64   if (common_flags()->help) parser.PrintFlagDescriptions();
65 }
66 
__lsan_init()67 extern "C" void __lsan_init() {
68   CHECK(!lsan_init_is_running);
69   if (lsan_inited)
70     return;
71   lsan_init_is_running = true;
72   SanitizerToolName = "LeakSanitizer";
73   CacheBinaryName();
74   InitializeFlags();
75   InitCommonLsan();
76   InitializeAllocator();
77   InitTlsSize();
78   InitializeInterceptors();
79   InitializeThreadRegistry();
80   u32 tid = ThreadCreate(0, 0, true);
81   CHECK_EQ(tid, 0);
82   ThreadStart(tid, GetTid());
83   SetCurrentThread(tid);
84 
85   if (common_flags()->detect_leaks && common_flags()->leak_check_at_exit)
86     Atexit(DoLeakCheck);
87 
88   InitializeCoverage(common_flags()->coverage, common_flags()->coverage_dir);
89 
90   lsan_inited = true;
91   lsan_init_is_running = false;
92 }
93 
94 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
__sanitizer_print_stack_trace()95 void __sanitizer_print_stack_trace() {
96   GET_STACK_TRACE_FATAL;
97   stack.Print();
98 }
99