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
|
//===-- sanitizer_flag_parser.cc ------------------------------------------===//
//
// 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 ThreadSanitizer/AddressSanitizer runtime.
//
//===----------------------------------------------------------------------===//
#include "sanitizer_flag_parser.h"
#include "sanitizer_common.h"
#include "sanitizer_libc.h"
#include "sanitizer_flags.h"
#include "sanitizer_flag_parser.h"
namespace __sanitizer {
LowLevelAllocator FlagParser::Alloc;
class UnknownFlags {
static const int kMaxUnknownFlags = 20;
const char *unknown_flags_[kMaxUnknownFlags];
int n_unknown_flags_;
public:
void Add(const char *name) {
CHECK_LT(n_unknown_flags_, kMaxUnknownFlags);
unknown_flags_[n_unknown_flags_++] = name;
}
void Report() {
if (!n_unknown_flags_) return;
Printf("WARNING: found %d unrecognized flag(s):\n", n_unknown_flags_);
for (int i = 0; i < n_unknown_flags_; ++i)
Printf(" %s\n", unknown_flags_[i]);
n_unknown_flags_ = 0;
}
};
UnknownFlags unknown_flags;
void ReportUnrecognizedFlags() {
unknown_flags.Report();
}
char *FlagParser::ll_strndup(const char *s, uptr n) {
uptr len = internal_strnlen(s, n);
char *s2 = (char*)Alloc.Allocate(len + 1);
internal_memcpy(s2, s, len);
s2[len] = 0;
return s2;
}
void FlagParser::PrintFlagDescriptions() {
Printf("Available flags for %s:\n", SanitizerToolName);
for (int i = 0; i < n_flags_; ++i)
Printf("\t%s\n\t\t- %s\n", flags_[i].name, flags_[i].desc);
}
void FlagParser::fatal_error(const char *err) {
Printf("ERROR: %s\n", err);
Die();
}
bool FlagParser::is_space(char c) {
return c == ' ' || c == ',' || c == ':' || c == '\n' || c == '\t' ||
c == '\r';
}
void FlagParser::skip_whitespace() {
while (is_space(buf_[pos_])) ++pos_;
}
void FlagParser::parse_flag() {
uptr name_start = pos_;
while (buf_[pos_] != 0 && buf_[pos_] != '=' && !is_space(buf_[pos_])) ++pos_;
if (buf_[pos_] != '=') fatal_error("expected '='");
char *name = ll_strndup(buf_ + name_start, pos_ - name_start);
uptr value_start = ++pos_;
char *value;
if (buf_[pos_] == '\'' || buf_[pos_] == '"') {
char quote = buf_[pos_++];
while (buf_[pos_] != 0 && buf_[pos_] != quote) ++pos_;
if (buf_[pos_] == 0) fatal_error("unterminated string");
value = ll_strndup(buf_ + value_start + 1, pos_ - value_start - 1);
++pos_; // consume the closing quote
} else {
while (buf_[pos_] != 0 && !is_space(buf_[pos_])) ++pos_;
if (buf_[pos_] != 0 && !is_space(buf_[pos_]))
fatal_error("expected separator or eol");
value = ll_strndup(buf_ + value_start, pos_ - value_start);
}
bool res = run_handler(name, value);
if (!res) fatal_error("Flag parsing failed.");
}
void FlagParser::parse_flags() {
while (true) {
skip_whitespace();
if (buf_[pos_] == 0) break;
parse_flag();
}
// Do a sanity check for certain flags.
if (common_flags_dont_use.malloc_context_size < 1)
common_flags_dont_use.malloc_context_size = 1;
}
void FlagParser::ParseString(const char *s) {
if (!s) return;
// Backup current parser state to allow nested ParseString() calls.
const char *old_buf_ = buf_;
uptr old_pos_ = pos_;
buf_ = s;
pos_ = 0;
parse_flags();
buf_ = old_buf_;
pos_ = old_pos_;
}
bool FlagParser::ParseFile(const char *path, bool ignore_missing) {
static const uptr kMaxIncludeSize = 1 << 15;
char *data;
uptr data_mapped_size;
error_t err;
uptr len;
if (!ReadFileToBuffer(path, &data, &data_mapped_size, &len,
Max(kMaxIncludeSize, GetPageSizeCached()), &err)) {
if (ignore_missing)
return true;
Printf("Failed to read options from '%s': error %d\n", path, err);
return false;
}
ParseString(data);
UnmapOrDie(data, data_mapped_size);
return true;
}
bool FlagParser::run_handler(const char *name, const char *value) {
for (int i = 0; i < n_flags_; ++i) {
if (internal_strcmp(name, flags_[i].name) == 0)
return flags_[i].handler->Parse(value);
}
// Unrecognized flag. This is not a fatal error, we may print a warning later.
unknown_flags.Add(name);
return true;
}
void FlagParser::RegisterHandler(const char *name, FlagHandlerBase *handler,
const char *desc) {
CHECK_LT(n_flags_, kMaxFlags);
flags_[n_flags_].name = name;
flags_[n_flags_].desc = desc;
flags_[n_flags_].handler = handler;
++n_flags_;
}
FlagParser::FlagParser() : n_flags_(0), buf_(nullptr), pos_(0) {
flags_ = (Flag *)Alloc.Allocate(sizeof(Flag) * kMaxFlags);
}
} // namespace __sanitizer
|
