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
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
// SPDX-License-Identifier: GPL-3.0-or-later
#include "../libnetdata.h"
static size_t default_stacksize = 0, wanted_stacksize = 0;
static pthread_attr_t *attr = NULL;
// ----------------------------------------------------------------------------
// per thread data
typedef struct {
void *arg;
pthread_t *thread;
const char *tag;
void *(*start_routine) (void *);
NETDATA_THREAD_OPTIONS options;
} NETDATA_THREAD;
static __thread NETDATA_THREAD *netdata_thread = NULL;
inline int netdata_thread_tag_exists(void) {
return (netdata_thread && netdata_thread->tag && *netdata_thread->tag);
}
const char *netdata_thread_tag(void) {
return (netdata_thread_tag_exists() ? netdata_thread->tag : "MAIN");
}
// ----------------------------------------------------------------------------
// compatibility library functions
pid_t gettid(void) {
#ifdef __FreeBSD__
return (pid_t)pthread_getthreadid_np();
#elif defined(__APPLE__)
#if (defined __MAC_OS_X_VERSION_MIN_REQUIRED && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1060)
uint64_t curthreadid;
pthread_threadid_np(NULL, &curthreadid);
return (pid_t)curthreadid;
#else /* __MAC_OS_X_VERSION_MIN_REQUIRED */
return (pid_t)pthread_self;
#endif /* __MAC_OS_X_VERSION_MIN_REQUIRED */
#else /* __APPLE__*/
return (pid_t)syscall(SYS_gettid);
#endif /* __FreeBSD__, __APPLE__*/
}
// ----------------------------------------------------------------------------
// early initialization
size_t netdata_threads_init(void) {
int i;
// --------------------------------------------------------------------
// get the required stack size of the threads of netdata
attr = callocz(1, sizeof(pthread_attr_t));
i = pthread_attr_init(attr);
if(i != 0)
fatal("pthread_attr_init() failed with code %d.", i);
i = pthread_attr_getstacksize(attr, &default_stacksize);
if(i != 0)
fatal("pthread_attr_getstacksize() failed with code %d.", i);
else
debug(D_OPTIONS, "initial pthread stack size is %zu bytes", default_stacksize);
return default_stacksize;
}
// ----------------------------------------------------------------------------
// late initialization
void netdata_threads_init_after_fork(size_t stacksize) {
wanted_stacksize = stacksize;
int i;
// ------------------------------------------------------------------------
// set default pthread stack size
if(attr && default_stacksize < wanted_stacksize && wanted_stacksize > 0) {
i = pthread_attr_setstacksize(attr, wanted_stacksize);
if(i != 0)
fatal("pthread_attr_setstacksize() to %zu bytes, failed with code %d.", wanted_stacksize, i);
else
debug(D_SYSTEM, "Successfully set pthread stacksize to %zu bytes", wanted_stacksize);
}
}
// ----------------------------------------------------------------------------
// netdata_thread_create
static void thread_cleanup(void *ptr) {
if(netdata_thread != ptr) {
NETDATA_THREAD *info = (NETDATA_THREAD *)ptr;
error("THREADS: internal error - thread local variable does not match the one passed to this function. Expected thread '%s', passed thread '%s'", netdata_thread->tag, info->tag);
}
if(!(netdata_thread->options & NETDATA_THREAD_OPTION_DONT_LOG_CLEANUP))
info("thread with task id %d finished", gettid());
freez((void *)netdata_thread->tag);
netdata_thread->tag = NULL;
freez(netdata_thread);
netdata_thread = NULL;
}
static void thread_set_name_np(NETDATA_THREAD *nt) {
if (nt->tag) {
int ret = 0;
char threadname[NETDATA_THREAD_NAME_MAX+1];
strncpyz(threadname, nt->tag, NETDATA_THREAD_NAME_MAX);
#if defined(__FreeBSD__)
pthread_set_name_np(pthread_self(), threadname);
#elif defined(__APPLE__)
ret = pthread_setname_np(threadname);
#else
ret = pthread_setname_np(pthread_self(), threadname);
#endif
if (ret != 0)
error("cannot set pthread name of %d to %s. ErrCode: %d", gettid(), threadname, ret);
else
info("set name of thread %d to %s", gettid(), threadname);
}
}
void uv_thread_set_name_np(uv_thread_t ut, const char* name) {
int ret = 0;
char threadname[NETDATA_THREAD_NAME_MAX+1];
strncpyz(threadname, name, NETDATA_THREAD_NAME_MAX);
#if defined(__FreeBSD__)
pthread_set_name_np(ut, threadname);
#elif defined(__APPLE__)
// Apple can only set its own name
UNUSED(ut);
#else
ret = pthread_setname_np(ut, threadname);
#endif
if (ret)
info("cannot set libuv thread name to %s. Err: %d", threadname, ret);
}
void os_thread_get_current_name_np(char threadname[NETDATA_THREAD_NAME_MAX + 1])
{
threadname[0] = '\0';
#if defined(__FreeBSD__)
pthread_get_name_np(pthread_self(), threadname, NETDATA_THREAD_NAME_MAX + 1);
#elif defined(HAVE_PTHREAD_GETNAME_NP) /* Linux & macOS */
(void)pthread_getname_np(pthread_self(), threadname, NETDATA_THREAD_NAME_MAX + 1);
#endif
}
static void *thread_start(void *ptr) {
netdata_thread = (NETDATA_THREAD *)ptr;
if(!(netdata_thread->options & NETDATA_THREAD_OPTION_DONT_LOG_STARTUP))
info("thread created with task id %d", gettid());
if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
error("cannot set pthread cancel type to DEFERRED.");
if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
error("cannot set pthread cancel state to ENABLE.");
thread_set_name_np(ptr);
void *ret = NULL;
pthread_cleanup_push(thread_cleanup, ptr);
ret = netdata_thread->start_routine(netdata_thread->arg);
pthread_cleanup_pop(1);
return ret;
}
int netdata_thread_create(netdata_thread_t *thread, const char *tag, NETDATA_THREAD_OPTIONS options, void *(*start_routine) (void *), void *arg) {
NETDATA_THREAD *info = mallocz(sizeof(NETDATA_THREAD));
info->arg = arg;
info->thread = thread;
info->tag = strdupz(tag);
info->start_routine = start_routine;
info->options = options;
int ret = pthread_create(thread, attr, thread_start, info);
if(ret != 0)
error("failed to create new thread for %s. pthread_create() failed with code %d", tag, ret);
else {
if (!(options & NETDATA_THREAD_OPTION_JOINABLE)) {
int ret2 = pthread_detach(*thread);
if (ret2 != 0)
error("cannot request detach of newly created %s thread. pthread_detach() failed with code %d", tag, ret2);
}
}
return ret;
}
// ----------------------------------------------------------------------------
// netdata_thread_cancel
int netdata_thread_cancel(netdata_thread_t thread) {
int ret = pthread_cancel(thread);
if(ret != 0)
error("cannot cancel thread. pthread_cancel() failed with code %d.", ret);
return ret;
}
// ----------------------------------------------------------------------------
// netdata_thread_join
int netdata_thread_join(netdata_thread_t thread, void **retval) {
int ret = pthread_join(thread, retval);
if(ret != 0)
error("cannot join thread. pthread_join() failed with code %d.", ret);
return ret;
}
int netdata_thread_detach(pthread_t thread) {
int ret = pthread_detach(thread);
if(ret != 0)
error("cannot detach thread. pthread_detach() failed with code %d.", ret);
return ret;
}
|