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
|
/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <functional>
#include <string>
#include <vector>
#include <android-base/file.h>
namespace android {
namespace procinfo {
template <class CallbackType>
bool ReadMapFileContent(char* content, const CallbackType& callback) {
uint64_t start_addr;
uint64_t end_addr;
uint16_t flags;
uint64_t pgoff;
ino_t inode;
char* next_line = content;
char* p;
auto pass_space = [&]() {
if (*p != ' ') {
return false;
}
while (*p == ' ') {
p++;
}
return true;
};
auto pass_xdigit = [&]() {
if (!isxdigit(*p)) {
return false;
}
do {
p++;
} while (isxdigit(*p));
return true;
};
while (next_line != nullptr && *next_line != '\0') {
p = next_line;
next_line = strchr(next_line, '\n');
if (next_line != nullptr) {
*next_line = '\0';
next_line++;
}
// Parse line like: 00400000-00409000 r-xp 00000000 fc:00 426998 /usr/lib/gvfs/gvfsd-http
char* end;
// start_addr
start_addr = strtoull(p, &end, 16);
if (end == p || *end != '-') {
return false;
}
p = end + 1;
// end_addr
end_addr = strtoull(p, &end, 16);
if (end == p) {
return false;
}
p = end;
if (!pass_space()) {
return false;
}
// flags
flags = 0;
if (*p == 'r') {
flags |= PROT_READ;
} else if (*p != '-') {
return false;
}
p++;
if (*p == 'w') {
flags |= PROT_WRITE;
} else if (*p != '-') {
return false;
}
p++;
if (*p == 'x') {
flags |= PROT_EXEC;
} else if (*p != '-') {
return false;
}
p++;
if (*p != 'p' && *p != 's') {
return false;
}
p++;
if (!pass_space()) {
return false;
}
// pgoff
pgoff = strtoull(p, &end, 16);
if (end == p) {
return false;
}
p = end;
if (!pass_space()) {
return false;
}
// major:minor
if (!pass_xdigit() || *p++ != ':' || !pass_xdigit() || !pass_space()) {
return false;
}
// inode
inode = strtoull(p, &end, 10);
if (end == p) {
return false;
}
p = end;
if (*p != '\0' && !pass_space()) {
return false;
}
// filename
callback(start_addr, end_addr, flags, pgoff, inode, p);
}
return true;
}
inline bool ReadMapFile(const std::string& map_file,
const std::function<void(uint64_t, uint64_t, uint16_t, uint64_t, ino_t,
const char*)>& callback) {
std::string content;
if (!android::base::ReadFileToString(map_file, &content)) {
return false;
}
return ReadMapFileContent(&content[0], callback);
}
inline bool ReadProcessMaps(pid_t pid,
const std::function<void(uint64_t, uint64_t, uint16_t, uint64_t, ino_t,
const char*)>& callback) {
return ReadMapFile("/proc/" + std::to_string(pid) + "/maps", callback);
}
struct MapInfo {
uint64_t start;
uint64_t end;
uint16_t flags;
uint64_t pgoff;
ino_t inode;
std::string name;
MapInfo(uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, ino_t inode,
const char* name)
: start(start), end(end), flags(flags), pgoff(pgoff), inode(inode), name(name) {}
};
inline bool ReadProcessMaps(pid_t pid, std::vector<MapInfo>* maps) {
return ReadProcessMaps(
pid, [&](uint64_t start, uint64_t end, uint16_t flags, uint64_t pgoff, ino_t inode,
const char* name) { maps->emplace_back(start, end, flags, pgoff, inode, name); });
}
bool ReadMapFileAsyncSafe(const char* map_file, void* buffer, size_t buffer_size,
const std::function<void(uint64_t, uint64_t, uint16_t, uint64_t, ino_t,
const char*)>& callback);
} /* namespace procinfo */
} /* namespace android */
|
