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
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
|
// SPDX-License-Identifier: GPL-3.0-or-later
#include "../libnetdata.h"
static pthread_attr_t *netdata_threads_attr = NULL;
// ----------------------------------------------------------------------------
// per thread data
typedef struct {
void *arg;
char tag[NETDATA_THREAD_NAME_MAX + 1];
SPINLOCK detach_lock;
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);
}
static const char *thread_name_get(bool recheck) {
static __thread char threadname[NETDATA_THREAD_NAME_MAX + 1] = "";
if(netdata_thread_tag_exists())
strncpyz(threadname, netdata_thread->tag, NETDATA_THREAD_NAME_MAX);
else {
if(!recheck && threadname[0])
return threadname;
#if defined(__FreeBSD__)
pthread_get_name_np(pthread_self(), threadname, NETDATA_THREAD_NAME_MAX + 1);
if(strcmp(threadname, "netdata") == 0)
strncpyz(threadname, "MAIN", NETDATA_THREAD_NAME_MAX);
#elif defined(__APPLE__)
strncpyz(threadname, "MAIN", NETDATA_THREAD_NAME_MAX);
#elif defined(HAVE_PTHREAD_GETNAME_NP)
pthread_getname_np(pthread_self(), threadname, NETDATA_THREAD_NAME_MAX + 1);
if(strcmp(threadname, "netdata") == 0)
strncpyz(threadname, "MAIN", NETDATA_THREAD_NAME_MAX);
#else
strncpyz(threadname, "MAIN", NETDATA_THREAD_NAME_MAX);
#endif
}
return threadname;
}
const char *netdata_thread_tag(void) {
return thread_name_get(false);
}
static size_t webrtc_id = 0;
static __thread bool webrtc_name_set = false;
void webrtc_set_thread_name(void) {
if(!netdata_thread && !webrtc_name_set) {
webrtc_name_set = true;
char threadname[NETDATA_THREAD_NAME_MAX + 1];
#if defined(__FreeBSD__)
snprintfz(threadname, NETDATA_THREAD_NAME_MAX, "WEBRTC[%zu]", __atomic_fetch_add(&webrtc_id, 1, __ATOMIC_RELAXED));
pthread_set_name_np(pthread_self(), threadname);
#elif defined(__APPLE__)
snprintfz(threadname, NETDATA_THREAD_NAME_MAX, "WEBRTC[%zu]", __atomic_fetch_add(&webrtc_id, 1, __ATOMIC_RELAXED));
pthread_setname_np(threadname);
#elif defined(HAVE_PTHREAD_GETNAME_NP)
pthread_getname_np(pthread_self(), threadname, NETDATA_THREAD_NAME_MAX+1);
if(strcmp(threadname, "netdata") == 0) {
snprintfz(threadname, NETDATA_THREAD_NAME_MAX, "WEBRTC[%zu]", __atomic_fetch_add(&webrtc_id, 1, __ATOMIC_RELAXED));
pthread_setname_np(pthread_self(), threadname);
}
#else
snprintfz(threadname, NETDATA_THREAD_NAME_MAX, "WEBRTC[%zu]", __atomic_fetch_add(&webrtc_id, 1, __ATOMIC_RELAXED));
pthread_setname_np(pthread_self(), threadname);
#endif
thread_name_get(true);
}
}
// ----------------------------------------------------------------------------
// compatibility library functions
static __thread pid_t gettid_cached_tid = 0;
pid_t gettid(void) {
pid_t tid = 0;
if(likely(gettid_cached_tid > 0))
return gettid_cached_tid;
#ifdef __FreeBSD__
tid = (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);
tid = (pid_t)curthreadid;
#else /* __MAC_OS_X_VERSION_MIN_REQUIRED */
tid = (pid_t)pthread_self;
#endif /* __MAC_OS_X_VERSION_MIN_REQUIRED */
#else /* __APPLE__*/
tid = (pid_t)syscall(SYS_gettid);
#endif /* __FreeBSD__, __APPLE__*/
gettid_cached_tid = tid;
return tid;
}
// ----------------------------------------------------------------------------
// early initialization
size_t netdata_threads_init(void) {
int i;
// --------------------------------------------------------------------
// get the required stack size of the threads of netdata
if(!netdata_threads_attr) {
netdata_threads_attr = callocz(1, sizeof(pthread_attr_t));
i = pthread_attr_init(netdata_threads_attr);
if (i != 0)
fatal("pthread_attr_init() failed with code %d.", i);
}
size_t stacksize = 0;
i = pthread_attr_getstacksize(netdata_threads_attr, &stacksize);
if(i != 0)
fatal("pthread_attr_getstacksize() failed with code %d.", i);
else
netdata_log_debug(D_OPTIONS, "initial pthread stack size is %zu bytes", stacksize);
return stacksize;
}
// ----------------------------------------------------------------------------
// late initialization
void netdata_threads_init_after_fork(size_t stacksize) {
int i;
// ------------------------------------------------------------------------
// set pthread stack size
if(netdata_threads_attr && stacksize > (size_t)PTHREAD_STACK_MIN) {
i = pthread_attr_setstacksize(netdata_threads_attr, stacksize);
if(i != 0)
netdata_log_error("pthread_attr_setstacksize() to %zu bytes, failed with code %d.", stacksize, i);
else
netdata_log_info("Set threads stack size to %zu bytes", stacksize);
}
else
netdata_log_error("Invalid pthread stacksize %zu", stacksize);
}
// ----------------------------------------------------------------------------
// threads init for external plugins
void netdata_threads_init_for_external_plugins(size_t stacksize) {
size_t default_stacksize = netdata_threads_init();
if(default_stacksize < 1 * 1024 * 1024)
default_stacksize = 1 * 1024 * 1024;
netdata_threads_init_after_fork(stacksize ? stacksize : default_stacksize);
}
// ----------------------------------------------------------------------------
// netdata_thread_create
void rrdset_thread_rda_free(void);
void sender_thread_buffer_free(void);
void query_target_free(void);
void service_exits(void);
void rrd_collector_finished(void);
static void thread_cleanup(void *ptr) {
if(netdata_thread != ptr) {
NETDATA_THREAD *info = (NETDATA_THREAD *)ptr;
netdata_log_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);
}
spinlock_lock(&netdata_thread->detach_lock);
if(!(netdata_thread->options & NETDATA_THREAD_OPTION_DONT_LOG_CLEANUP))
netdata_log_info("thread with task id %d finished", gettid());
rrd_collector_finished();
sender_thread_buffer_free();
rrdset_thread_rda_free();
query_target_free();
thread_cache_destroy();
service_exits();
worker_unregister();
netdata_thread->tag[0] = '\0';
spinlock_unlock(&netdata_thread->detach_lock);
freez(netdata_thread);
netdata_thread = NULL;
}
static void thread_set_name_np(NETDATA_THREAD *nt) {
if (nt && nt->tag[0]) {
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)
netdata_log_error("cannot set pthread name of %d to %s. ErrCode: %d", gettid(), threadname, ret);
else
netdata_log_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 ? ut : pthread_self(), threadname);
#elif defined(__APPLE__)
// Apple can only set its own name
UNUSED(ut);
#else
ret = pthread_setname_np(ut ? ut : pthread_self(), threadname);
#endif
thread_name_get(true);
if (ret)
netdata_log_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 *netdata_thread_init(void *ptr) {
netdata_thread = (NETDATA_THREAD *)ptr;
if(!(netdata_thread->options & NETDATA_THREAD_OPTION_DONT_LOG_STARTUP))
netdata_log_info("thread created with task id %d", gettid());
if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
netdata_log_error("cannot set pthread cancel type to DEFERRED.");
if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
netdata_log_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 = callocz(1, sizeof(NETDATA_THREAD));
info->arg = arg;
info->start_routine = start_routine;
info->options = options;
strncpyz(info->tag, tag, NETDATA_THREAD_NAME_MAX);
spinlock_init(&info->detach_lock);
spinlock_lock(&info->detach_lock);
int ret = pthread_create(thread, netdata_threads_attr, netdata_thread_init, info);
if(ret != 0)
netdata_log_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)
netdata_log_error("cannot request detach of newly created %s thread. pthread_detach() failed with code %d", tag, ret2);
}
}
spinlock_unlock(&info->detach_lock);
return ret;
}
// ----------------------------------------------------------------------------
// netdata_thread_cancel
#ifdef NETDATA_INTERNAL_CHECKS
int netdata_thread_cancel_with_trace(netdata_thread_t thread, int line, const char *file, const char *function) {
#else
int netdata_thread_cancel(netdata_thread_t thread) {
#endif
int ret = pthread_cancel(thread);
if(ret != 0)
#ifdef NETDATA_INTERNAL_CHECKS
netdata_log_error("cannot cancel thread. pthread_cancel() failed with code %d at %d@%s, function %s()", ret, line, file, function);
#else
netdata_log_error("cannot cancel thread. pthread_cancel() failed with code %d.", ret);
#endif
return ret;
}
// ----------------------------------------------------------------------------
// netdata_thread_join
int netdata_thread_join(netdata_thread_t thread, void **retval) {
int ret = pthread_join(thread, retval);
if(ret != 0)
netdata_log_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)
netdata_log_error("cannot detach thread. pthread_detach() failed with code %d.", ret);
return ret;
}
|