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
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
//===-- sanitizer_common.h --------------------------------------*- C++ -*-===//
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is shared between AddressSanitizer and ThreadSanitizer
// run-time libraries.
// It declares common functions and classes that are used in both runtimes.
// Implementation of some functions are provided in sanitizer_common, while
// others must be defined by run-time library itself.
//===----------------------------------------------------------------------===//
#ifndef SANITIZER_COMMON_H
#define SANITIZER_COMMON_H
#include "sanitizer_internal_defs.h"
namespace __sanitizer {
// Constants.
const uptr kWordSize = SANITIZER_WORDSIZE / 8;
const uptr kWordSizeInBits = 8 * kWordSize;
#if defined(__powerpc__) || defined(__powerpc64__)
// Current PPC64 kernels use 64K pages sizes, but they can be
// configured with 4K or even other sizes.
// We may want to use getpagesize() or sysconf(_SC_PAGESIZE) here rather than
// hardcoding the values, but today these values need to be compile-time
// constants.
const uptr kPageSize = 1UL << 16;
const uptr kCacheLineSize = 128;
const uptr kMmapGranularity = kPageSize;
#elif !defined(_WIN32)
const uptr kPageSize = 1UL << 12;
const uptr kCacheLineSize = 64;
const uptr kMmapGranularity = kPageSize;
#else
const uptr kPageSize = 1UL << 12;
const uptr kCacheLineSize = 64;
const uptr kMmapGranularity = 1UL << 16;
#endif
// Threads
int GetPid();
uptr GetTid();
uptr GetThreadSelf();
void GetThreadStackTopAndBottom(bool at_initialization, uptr *stack_top,
uptr *stack_bottom);
// Memory management
void *MmapOrDie(uptr size, const char *mem_type);
void UnmapOrDie(void *addr, uptr size);
void *MmapFixedNoReserve(uptr fixed_addr, uptr size);
void *Mprotect(uptr fixed_addr, uptr size);
// Used to check if we can map shadow memory to a fixed location.
bool MemoryRangeIsAvailable(uptr range_start, uptr range_end);
// Internal allocator
void *InternalAlloc(uptr size);
void InternalFree(void *p);
// Given the pointer p into a valid allocated block,
// returns a pointer to the beginning of the block.
void *InternalAllocBlock(void *p);
// InternalScopedBuffer can be used instead of large stack arrays to
// keep frame size low.
// FIXME: use InternalAlloc instead of MmapOrDie once
// InternalAlloc is made libc-free.
template<typename T>
class InternalScopedBuffer {
public:
explicit InternalScopedBuffer(uptr cnt) {
cnt_ = cnt;
ptr_ = (T*)MmapOrDie(cnt * sizeof(T), "InternalScopedBuffer");
}
~InternalScopedBuffer() {
UnmapOrDie(ptr_, cnt_ * sizeof(T));
}
T &operator[](uptr i) { return ptr_[i]; }
T *data() { return ptr_; }
uptr size() { return cnt_ * sizeof(T); }
private:
T *ptr_;
uptr cnt_;
// Disallow evil constructors.
InternalScopedBuffer(const InternalScopedBuffer&);
void operator=(const InternalScopedBuffer&);
};
// Simple low-level (mmap-based) allocator for internal use. Doesn't have
// constructor, so all instances of LowLevelAllocator should be
// linker initialized.
class LowLevelAllocator {
public:
// Requires an external lock.
void *Allocate(uptr size);
private:
char *allocated_end_;
char *allocated_current_;
};
typedef void (*LowLevelAllocateCallback)(uptr ptr, uptr size);
// Allows to register tool-specific callbacks for LowLevelAllocator.
// Passing NULL removes the callback.
void SetLowLevelAllocateCallback(LowLevelAllocateCallback callback);
// IO
void RawWrite(const char *buffer);
bool PrintsToTty();
void Printf(const char *format, ...);
void Report(const char *format, ...);
void SetPrintfAndReportCallback(void (*callback)(const char *));
// Opens the file 'file_name" and reads up to 'max_len' bytes.
// The resulting buffer is mmaped and stored in '*buff'.
// The size of the mmaped region is stored in '*buff_size',
// Returns the number of read bytes or 0 if file can not be opened.
uptr ReadFileToBuffer(const char *file_name, char **buff,
uptr *buff_size, uptr max_len);
// Maps given file to virtual memory, and returns pointer to it
// (or NULL if the mapping failes). Stores the size of mmaped region
// in '*buff_size'.
void *MapFileToMemory(const char *file_name, uptr *buff_size);
// OS
void DisableCoreDumper();
void DumpProcessMap();
bool FileExists(const char *filename);
const char *GetEnv(const char *name);
const char *GetPwd();
void ReExec();
bool StackSizeIsUnlimited();
void SetStackSizeLimitInBytes(uptr limit);
// Other
void SleepForSeconds(int seconds);
void SleepForMillis(int millis);
int Atexit(void (*function)(void));
void SortArray(uptr *array, uptr size);
// Exit
void NORETURN Abort();
void NORETURN Exit(int exitcode);
void NORETURN Die();
void NORETURN SANITIZER_INTERFACE_ATTRIBUTE
CheckFailed(const char *file, int line, const char *cond, u64 v1, u64 v2);
// Specific tools may override behavior of "Die" and "CheckFailed" functions
// to do tool-specific job.
void SetDieCallback(void (*callback)(void));
typedef void (*CheckFailedCallbackType)(const char *, int, const char *,
u64, u64);
void SetCheckFailedCallback(CheckFailedCallbackType callback);
// Math
INLINE bool IsPowerOfTwo(uptr x) {
return (x & (x - 1)) == 0;
}
INLINE uptr RoundUpTo(uptr size, uptr boundary) {
CHECK(IsPowerOfTwo(boundary));
return (size + boundary - 1) & ~(boundary - 1);
}
// Don't use std::min, std::max or std::swap, to minimize dependency
// on libstdc++.
template<class T> T Min(T a, T b) { return a < b ? a : b; }
template<class T> T Max(T a, T b) { return a > b ? a : b; }
template<class T> void Swap(T& a, T& b) {
T tmp = a;
a = b;
b = tmp;
}
// Char handling
INLINE bool IsSpace(int c) {
return (c == ' ') || (c == '\n') || (c == '\t') ||
(c == '\f') || (c == '\r') || (c == '\v');
}
INLINE bool IsDigit(int c) {
return (c >= '0') && (c <= '9');
}
INLINE int ToLower(int c) {
return (c >= 'A' && c <= 'Z') ? (c + 'a' - 'A') : c;
}
#if SANITIZER_WORDSIZE == 64
# define FIRST_32_SECOND_64(a, b) (b)
#else
# define FIRST_32_SECOND_64(a, b) (a)
#endif
} // namespace __sanitizer
#endif // SANITIZER_COMMON_H
|
