msan.h revision 91659d56bab07fb82ac0edad18c04b333680fd62 
1//===-- msan.h --------------------------------------------------*- C++ -*-===//
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 MemorySanitizer.
11//
12// Private MSan header.
13//===----------------------------------------------------------------------===//
14
15#ifndef MSAN_H
16#define MSAN_H
17
18#include "sanitizer_common/sanitizer_flags.h"
19#include "sanitizer_common/sanitizer_internal_defs.h"
20#include "sanitizer_common/sanitizer_stacktrace.h"
21#include "msan_interface_internal.h"
22#include "msan_flags.h"
23
24#ifndef MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
25# define MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 1
26#endif
27
28#define MEM_TO_SHADOW(mem) (((uptr)mem)       & ~0x400000000000ULL)
29#define MEM_TO_ORIGIN(mem) (MEM_TO_SHADOW(mem) + 0x200000000000ULL)
30#define MEM_IS_APP(mem)    ((uptr)mem >=         0x600000000000ULL)
31#define MEM_IS_SHADOW(mem) ((uptr)mem >=         0x200000000000ULL && \
32                            (uptr)mem <=         0x400000000000ULL)
33
34const int kMsanParamTlsSizeInWords = 100;
35const int kMsanRetvalTlsSizeInWords = 100;
36
37namespace __msan {
38extern int msan_inited;
39extern bool msan_init_is_running;
40extern int msan_report_count;
41
42bool ProtectRange(uptr beg, uptr end);
43bool InitShadow(bool prot1, bool prot2, bool map_shadow, bool init_origins);
44char *GetProcSelfMaps();
45void InitializeInterceptors();
46
47void *MsanReallocate(StackTrace *stack, void *oldp, uptr size,
48                     uptr alignment, bool zeroise);
49void MsanDeallocate(void *ptr);
50void InstallTrapHandler();
51void InstallAtExitHandler();
52void ReplaceOperatorsNewAndDelete();
53
54void EnterSymbolizer();
55void ExitSymbolizer();
56bool IsInSymbolizer();
57
58struct SymbolizerScope {
59  SymbolizerScope() { EnterSymbolizer(); }
60  ~SymbolizerScope() { ExitSymbolizer(); }
61};
62
63void EnterLoader();
64void ExitLoader();
65
66void MsanDie();
67void PrintWarning(uptr pc, uptr bp);
68void PrintWarningWithOrigin(uptr pc, uptr bp, u32 origin);
69
70void GetStackTrace(StackTrace *stack, uptr max_s, uptr pc, uptr bp,
71                   bool fast);
72
73void ReportUMR(StackTrace *stack, u32 origin);
74void ReportExpectedUMRNotFound(StackTrace *stack);
75void ReportAtExitStatistics();
76
77// Unpoison first n function arguments.
78void UnpoisonParam(uptr n);
79void UnpoisonThreadLocalState();
80
81#define GET_MALLOC_STACK_TRACE                                     \
82  StackTrace stack;                                                \
83  stack.size = 0;                                                  \
84  if (__msan_get_track_origins() && msan_inited)                   \
85    GetStackTrace(&stack, common_flags()->malloc_context_size,     \
86        StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(),           \
87        common_flags()->fast_unwind_on_malloc)
88
89}  // namespace __msan
90
91#define MSAN_MALLOC_HOOK(ptr, size) \
92  if (&__msan_malloc_hook) __msan_malloc_hook(ptr, size)
93#define MSAN_FREE_HOOK(ptr) \
94  if (&__msan_free_hook) __msan_free_hook(ptr)
95
96#endif  // MSAN_H
97