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
24bool lsan_inited;
25bool lsan_init_is_running;
26
27namespace __lsan {
28
29///// Interface to the common LSan module. /////
30bool WordIsPoisoned(uptr addr) {
31  return false;
32}
33
34}  // namespace __lsan
35
36using namespace __lsan;  // NOLINT
37
38static 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.intercept_tls_get_addr = true;
47    cf.detect_leaks = true;
48    cf.exitcode = 23;
49    OverrideCommonFlags(cf);
50  }
51
52  Flags *f = flags();
53  f->SetDefaults();
54
55  FlagParser parser;
56  RegisterLsanFlags(&parser, f);
57  RegisterCommonFlags(&parser);
58
59  parser.ParseString(GetEnv("LSAN_OPTIONS"));
60
61  SetVerbosity(common_flags()->verbosity);
62
63  if (Verbosity()) ReportUnrecognizedFlags();
64
65  if (common_flags()->help) parser.PrintFlagDescriptions();
66}
67
68extern "C" void __lsan_init() {
69  CHECK(!lsan_init_is_running);
70  if (lsan_inited)
71    return;
72  lsan_init_is_running = true;
73  SanitizerToolName = "LeakSanitizer";
74  CacheBinaryName();
75  AvoidCVE_2016_2143();
76  InitializeFlags();
77  InitCommonLsan();
78  InitializeAllocator();
79  InitTlsSize();
80  InitializeInterceptors();
81  InitializeThreadRegistry();
82  u32 tid = ThreadCreate(0, 0, true);
83  CHECK_EQ(tid, 0);
84  ThreadStart(tid, GetTid());
85  SetCurrentThread(tid);
86
87  if (common_flags()->detect_leaks && common_flags()->leak_check_at_exit)
88    Atexit(DoLeakCheck);
89
90  InitializeCoverage(common_flags()->coverage, common_flags()->coverage_dir);
91
92  lsan_inited = true;
93  lsan_init_is_running = false;
94}
95
96extern "C" SANITIZER_INTERFACE_ATTRIBUTE
97void __sanitizer_print_stack_trace() {
98  GET_STACK_TRACE_FATAL;
99  stack.Print();
100}
101