msan.h revision c2918bf11fc65b1f9551eee03719e9bdf02eedd5 
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
34struct link_map;  // Opaque type returned by dlopen().
35
36const int kMsanParamTlsSizeInWords = 100;
37const int kMsanRetvalTlsSizeInWords = 100;
38
39namespace __msan {
40extern int msan_inited;
41extern bool msan_init_is_running;
42extern int msan_report_count;
43
44bool ProtectRange(uptr beg, uptr end);
45bool InitShadow(bool prot1, bool prot2, bool map_shadow, bool init_origins);
46char *GetProcSelfMaps();
47void InitializeInterceptors();
48
49void *MsanReallocate(StackTrace *stack, void *oldp, uptr size,
50                     uptr alignment, bool zeroise);
51void MsanDeallocate(void *ptr);
52void InstallTrapHandler();
53void InstallAtExitHandler();
54void ReplaceOperatorsNewAndDelete();
55
56void EnterSymbolizer();
57void ExitSymbolizer();
58bool IsInSymbolizer();
59
60struct SymbolizerScope {
61  SymbolizerScope() { EnterSymbolizer(); }
62  ~SymbolizerScope() { ExitSymbolizer(); }
63};
64
65void EnterLoader();
66void ExitLoader();
67
68void MsanDie();
69void PrintWarning(uptr pc, uptr bp);
70void PrintWarningWithOrigin(uptr pc, uptr bp, u32 origin);
71
72void GetStackTrace(StackTrace *stack, uptr max_s, uptr pc, uptr bp,
73                   bool fast);
74
75void ReportUMR(StackTrace *stack, u32 origin);
76void ReportExpectedUMRNotFound(StackTrace *stack);
77void ReportAtExitStatistics();
78
79void UnpoisonMappedDSO(struct link_map *map);
80// Unpoison first n function arguments.
81void UnpoisonParam(uptr n);
82
83#define GET_MALLOC_STACK_TRACE                                     \
84  StackTrace stack;                                                \
85  stack.size = 0;                                                  \
86  if (__msan_get_track_origins() && msan_inited)                   \
87    GetStackTrace(&stack, common_flags()->malloc_context_size,     \
88        StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(),           \
89        common_flags()->fast_unwind_on_malloc)
90
91}  // namespace __msan
92
93#endif  // MSAN_H
94