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
194
195
196
197
198
199
200
201
202
|
//===-- sanitizer_flag_parser.h ---------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of ThreadSanitizer/AddressSanitizer runtime.
//
//===----------------------------------------------------------------------===//
#ifndef SANITIZER_FLAG_REGISTRY_H
#define SANITIZER_FLAG_REGISTRY_H
#include "sanitizer_common.h"
#include "sanitizer_internal_defs.h"
#include "sanitizer_libc.h"
namespace __sanitizer {
class FlagHandlerBase {
public:
virtual bool Parse(const char *value) { return false; }
// Write the C string representation of the current value (truncated to fit)
// into the buffer of size `size`. Returns false if truncation occurred and
// returns true otherwise.
virtual bool Format(char *buffer, uptr size) {
if (size > 0)
buffer[0] = '\0';
return false;
}
protected:
~FlagHandlerBase() {}
inline bool FormatString(char *buffer, uptr size, const char *str_to_use) {
uptr num_symbols_should_write =
internal_snprintf(buffer, size, "%s", str_to_use);
return num_symbols_should_write < size;
}
};
template <typename T>
class FlagHandler final : public FlagHandlerBase {
T *t_;
public:
explicit FlagHandler(T *t) : t_(t) {}
bool Parse(const char *value) final;
bool Format(char *buffer, uptr size) final;
};
inline bool ParseBool(const char *value, bool *b) {
if (internal_strcmp(value, "0") == 0 ||
internal_strcmp(value, "no") == 0 ||
internal_strcmp(value, "false") == 0) {
*b = false;
return true;
}
if (internal_strcmp(value, "1") == 0 ||
internal_strcmp(value, "yes") == 0 ||
internal_strcmp(value, "true") == 0) {
*b = true;
return true;
}
return false;
}
template <>
inline bool FlagHandler<bool>::Parse(const char *value) {
if (ParseBool(value, t_)) return true;
Printf("ERROR: Invalid value for bool option: '%s'\n", value);
return false;
}
template <>
inline bool FlagHandler<bool>::Format(char *buffer, uptr size) {
return FormatString(buffer, size, *t_ ? "true" : "false");
}
template <>
inline bool FlagHandler<HandleSignalMode>::Parse(const char *value) {
bool b;
if (ParseBool(value, &b)) {
*t_ = b ? kHandleSignalYes : kHandleSignalNo;
return true;
}
if (internal_strcmp(value, "2") == 0 ||
internal_strcmp(value, "exclusive") == 0) {
*t_ = kHandleSignalExclusive;
return true;
}
Printf("ERROR: Invalid value for signal handler option: '%s'\n", value);
return false;
}
template <>
inline bool FlagHandler<HandleSignalMode>::Format(char *buffer, uptr size) {
uptr num_symbols_should_write = internal_snprintf(buffer, size, "%d", *t_);
return num_symbols_should_write < size;
}
template <>
inline bool FlagHandler<const char *>::Parse(const char *value) {
*t_ = value;
return true;
}
template <>
inline bool FlagHandler<const char *>::Format(char *buffer, uptr size) {
return FormatString(buffer, size, *t_);
}
template <>
inline bool FlagHandler<int>::Parse(const char *value) {
const char *value_end;
*t_ = internal_simple_strtoll(value, &value_end, 10);
bool ok = *value_end == 0;
if (!ok) Printf("ERROR: Invalid value for int option: '%s'\n", value);
return ok;
}
template <>
inline bool FlagHandler<int>::Format(char *buffer, uptr size) {
uptr num_symbols_should_write = internal_snprintf(buffer, size, "%d", *t_);
return num_symbols_should_write < size;
}
template <>
inline bool FlagHandler<uptr>::Parse(const char *value) {
const char *value_end;
*t_ = internal_simple_strtoll(value, &value_end, 10);
bool ok = *value_end == 0;
if (!ok) Printf("ERROR: Invalid value for uptr option: '%s'\n", value);
return ok;
}
template <>
inline bool FlagHandler<uptr>::Format(char *buffer, uptr size) {
uptr num_symbols_should_write = internal_snprintf(buffer, size, "0x%zx", *t_);
return num_symbols_should_write < size;
}
template <>
inline bool FlagHandler<s64>::Parse(const char *value) {
const char *value_end;
*t_ = internal_simple_strtoll(value, &value_end, 10);
bool ok = *value_end == 0;
if (!ok) Printf("ERROR: Invalid value for s64 option: '%s'\n", value);
return ok;
}
template <>
inline bool FlagHandler<s64>::Format(char *buffer, uptr size) {
uptr num_symbols_should_write = internal_snprintf(buffer, size, "%lld", *t_);
return num_symbols_should_write < size;
}
class FlagParser {
static const int kMaxFlags = 200;
struct Flag {
const char *name;
const char *desc;
FlagHandlerBase *handler;
} *flags_;
int n_flags_;
const char *buf_;
uptr pos_;
public:
FlagParser();
void RegisterHandler(const char *name, FlagHandlerBase *handler,
const char *desc);
void ParseString(const char *s, const char *env_name = 0);
void ParseStringFromEnv(const char *env_name);
bool ParseFile(const char *path, bool ignore_missing);
void PrintFlagDescriptions();
private:
void fatal_error(const char *err);
bool is_space(char c);
void skip_whitespace();
void parse_flags(const char *env_option_name);
void parse_flag(const char *env_option_name);
bool run_handler(const char *name, const char *value);
char *ll_strndup(const char *s, uptr n);
};
template <typename T>
static void RegisterFlag(FlagParser *parser, const char *name, const char *desc,
T *var) {
FlagHandler<T> *fh = new (GetGlobalLowLevelAllocator()) FlagHandler<T>(var);
parser->RegisterHandler(name, fh, desc);
}
void ReportUnrecognizedFlags();
} // namespace __sanitizer
#endif // SANITIZER_FLAG_REGISTRY_H
|
