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
|
/*
Copyright (C) 2015 - 2015 Evan Teran
evan.teran@gmail.com
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "PlatformCommon.h"
#include <fstream>
#include <iostream>
#include <linux/limits.h>
#include <sys/wait.h>
namespace DebuggerCorePlugin {
/**
* @brief resume_code
* @param status
* @return
*/
int resume_code(int status) {
if (WIFSTOPPED(status) && WSTOPSIG(status) == SIGSTOP) {
return 0;
}
if (WIFSIGNALED(status)) {
return WTERMSIG(status);
}
if (WIFSTOPPED(status)) {
return WSTOPSIG(status);
}
return 0;
}
/**
* gets the contents of /proc/<pid>/stat
*
* @brief get_user_stat
* @param path
* @param user_stat
* @return the number of elements successfully parsed
*/
int get_user_stat(const char *path, struct user_stat *user_stat) {
Q_ASSERT(user_stat);
std::ifstream stream(path);
std::string line;
if (std::getline(stream, line)) {
// the comm field is wrapped with "(" and ")", so we look for the closing one
size_t left = line.find_first_of('(');
size_t right = line.find_last_of(')');
if (right == std::string::npos || left == std::string::npos) {
return -1;
}
int r = sscanf(&line[right + 2], "%c %d %d %d %d %d %u %llu %llu %llu %llu %llu %llu %lld %lld %lld %lld %lld %lld %llu %llu %lld %llu %llu %llu %llu %llu %llu %llu %llu %llu %llu %llu %llu %llu %d %d %u %u %llu %llu %lld %llu %llu %llu %llu %llu %llu %llu %d",
&user_stat->state,
&user_stat->ppid,
&user_stat->pgrp,
&user_stat->session,
&user_stat->tty_nr,
&user_stat->tpgid,
&user_stat->flags,
&user_stat->minflt,
&user_stat->cminflt,
&user_stat->majflt,
&user_stat->cmajflt,
&user_stat->utime,
&user_stat->stime,
&user_stat->cutime,
&user_stat->cstime,
&user_stat->priority,
&user_stat->nice,
&user_stat->num_threads,
&user_stat->itrealvalue,
&user_stat->starttime,
&user_stat->vsize,
&user_stat->rss,
&user_stat->rsslim,
&user_stat->startcode,
&user_stat->endcode,
&user_stat->startstack,
&user_stat->kstkesp,
&user_stat->kstkeip,
&user_stat->signal,
&user_stat->blocked,
&user_stat->sigignore,
&user_stat->sigcatch,
&user_stat->wchan,
&user_stat->nswap,
&user_stat->cnswap,
&user_stat->exit_signal,
&user_stat->processor,
&user_stat->rt_priority,
&user_stat->policy,
// Linux 2.6.18
&user_stat->delayacct_blkio_ticks,
// Linux 2.6.24
&user_stat->guest_time,
&user_stat->cguest_time,
// Linux 3.3
&user_stat->start_data,
&user_stat->end_data,
&user_stat->start_brk,
// Linux 3.5
&user_stat->arg_start,
&user_stat->arg_end,
&user_stat->env_start,
&user_stat->env_end,
&user_stat->exit_code);
// fill in the pid
r += sscanf(&line[0], "%d", &user_stat->pid);
// fill in the comm field
const size_t len = std::min(sizeof(user_stat->comm), (right - left) - 1);
line.copy(user_stat->comm, len, left + 1);
user_stat->comm[len] = '\0';
++r;
return r;
}
return -1;
}
/**
* gets the contents of /proc/<pid>/stat
*
* @brief get_user_stat
* @param pid
* @param user_stat
* @return the number of elements or -1 on error
*/
int get_user_stat(edb::pid_t pid, struct user_stat *user_stat) {
char path[PATH_MAX];
snprintf(path, sizeof(path), "/proc/%d/stat", pid);
return get_user_stat(path, user_stat);
}
/**
* gets the contents of /proc/<pid>/task/<tid>/stat
*
* @brief get_user_task_stat
* @param pid
* @param tid
* @param user_stat
* @return the number of elements or -1 on error
*/
int get_user_task_stat(edb::pid_t pid, edb::tid_t tid, struct user_stat *user_stat) {
char path[PATH_MAX];
snprintf(path, sizeof(path), "/proc/%d/task/%d/stat", pid, tid);
return get_user_stat(path, user_stat);
}
}
|
