1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
//===-- hwasan.h --------------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is a part of HWAddressSanitizer.
//
// Private Hwasan header.
//===----------------------------------------------------------------------===//
#ifndef HWASAN_H
#define HWASAN_H
#include "sanitizer_common/sanitizer_flags.h"
#include "sanitizer_common/sanitizer_internal_defs.h"
#include "sanitizer_common/sanitizer_stacktrace.h"
#include "hwasan_interface_internal.h"
#include "hwasan_flags.h"
#include "ubsan/ubsan_platform.h"
#ifndef HWASAN_REPLACE_OPERATORS_NEW_AND_DELETE
# define HWASAN_REPLACE_OPERATORS_NEW_AND_DELETE 1
#endif
#ifndef HWASAN_CONTAINS_UBSAN
# define HWASAN_CONTAINS_UBSAN CAN_SANITIZE_UB
#endif
typedef u8 tag_t;
// Reasonable values are 4 (for 1/16th shadow) and 6 (for 1/64th).
const uptr kShadowScale = 4;
const uptr kShadowAlignment = 1UL << kShadowScale;
#define MEM_TO_SHADOW_OFFSET(mem) ((uptr)(mem) >> kShadowScale)
#define MEM_TO_SHADOW(mem) ((uptr)(mem) >> kShadowScale)
#define SHADOW_TO_MEM(shadow) ((uptr)(shadow) << kShadowScale)
#define MEM_IS_APP(mem) true
// TBI (Top Byte Ignore) feature of AArch64: bits [63:56] are ignored in address
// translation and can be used to store a tag.
const unsigned kAddressTagShift = 56;
const uptr kAddressTagMask = 0xFFUL << kAddressTagShift;
static inline tag_t GetTagFromPointer(uptr p) {
return p >> kAddressTagShift;
}
static inline uptr GetAddressFromPointer(uptr p) {
return p & ~kAddressTagMask;
}
static inline void * GetAddressFromPointer(const void *p) {
return (void *)((uptr)p & ~kAddressTagMask);
}
static inline uptr AddTagToPointer(uptr p, tag_t tag) {
return (p & ~kAddressTagMask) | ((uptr)tag << kAddressTagShift);
}
namespace __hwasan {
extern int hwasan_inited;
extern bool hwasan_init_is_running;
extern int hwasan_report_count;
bool ProtectRange(uptr beg, uptr end);
bool InitShadow();
char *GetProcSelfMaps();
void InitializeInterceptors();
void HwasanAllocatorInit();
void HwasanAllocatorThreadFinish();
void HwasanDeallocate(StackTrace *stack, void *ptr);
void *hwasan_malloc(uptr size, StackTrace *stack);
void *hwasan_calloc(uptr nmemb, uptr size, StackTrace *stack);
void *hwasan_realloc(void *ptr, uptr size, StackTrace *stack);
void *hwasan_valloc(uptr size, StackTrace *stack);
void *hwasan_pvalloc(uptr size, StackTrace *stack);
void *hwasan_aligned_alloc(uptr alignment, uptr size, StackTrace *stack);
void *hwasan_memalign(uptr alignment, uptr size, StackTrace *stack);
int hwasan_posix_memalign(void **memptr, uptr alignment, uptr size,
StackTrace *stack);
void InstallTrapHandler();
void InstallAtExitHandler();
const char *GetStackOriginDescr(u32 id, uptr *pc);
void EnterSymbolizer();
void ExitSymbolizer();
bool IsInSymbolizer();
struct SymbolizerScope {
SymbolizerScope() { EnterSymbolizer(); }
~SymbolizerScope() { ExitSymbolizer(); }
};
void PrintWarning(uptr pc, uptr bp);
void GetStackTrace(BufferedStackTrace *stack, uptr max_s, uptr pc, uptr bp,
void *context, bool request_fast_unwind);
void ReportInvalidAccess(StackTrace *stack, u32 origin);
void ReportTagMismatch(StackTrace *stack, uptr addr, uptr access_size,
bool is_store);
void ReportStats();
void ReportAtExitStatistics();
void DescribeMemoryRange(const void *x, uptr size);
void ReportInvalidAccessInsideAddressRange(const char *what, const void *start, uptr size,
uptr offset);
// Returns a "chained" origin id, pointing to the given stack trace followed by
// the previous origin id.
u32 ChainOrigin(u32 id, StackTrace *stack);
const int STACK_TRACE_TAG_POISON = StackTrace::TAG_CUSTOM + 1;
#define GET_MALLOC_STACK_TRACE \
BufferedStackTrace stack; \
if (hwasan_inited) \
GetStackTrace(&stack, common_flags()->malloc_context_size, \
StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(), nullptr, \
common_flags()->fast_unwind_on_malloc)
#define GET_FATAL_STACK_TRACE_PC_BP(pc, bp) \
BufferedStackTrace stack; \
if (hwasan_inited) \
GetStackTrace(&stack, kStackTraceMax, pc, bp, nullptr, \
common_flags()->fast_unwind_on_fatal)
class ScopedThreadLocalStateBackup {
public:
ScopedThreadLocalStateBackup() { Backup(); }
~ScopedThreadLocalStateBackup() { Restore(); }
void Backup();
void Restore();
private:
u64 va_arg_overflow_size_tls;
};
void HwasanTSDInit(void (*destructor)(void *tsd));
void *HwasanTSDGet();
void HwasanTSDSet(void *tsd);
void HwasanTSDDtor(void *tsd);
void HwasanOnDeadlySignal(int signo, void *info, void *context);
} // namespace __hwasan
#define HWASAN_MALLOC_HOOK(ptr, size) \
do { \
if (&__sanitizer_malloc_hook) { \
__sanitizer_malloc_hook(ptr, size); \
} \
RunMallocHooks(ptr, size); \
} while (false)
#define HWASAN_FREE_HOOK(ptr) \
do { \
if (&__sanitizer_free_hook) { \
__sanitizer_free_hook(ptr); \
} \
RunFreeHooks(ptr); \
} while (false)
#endif // HWASAN_H
|
