2 * mono-threads-posix.c: Low-level threading, posix version
5 * Rodrigo Kumpera (kumpera@gmail.com)
12 /* For pthread_main_np, pthread_get_stackaddr_np and pthread_get_stacksize_np */
13 #if defined (__MACH__)
14 #define _DARWIN_C_SOURCE 1
17 #include <mono/utils/mono-threads.h>
18 #include <mono/utils/mono-coop-semaphore.h>
19 #include <mono/metadata/gc-internals.h>
20 #include <mono/utils/mono-threads-debug.h>
24 #if defined(PLATFORM_ANDROID) && !defined(TARGET_ARM64) && !defined(TARGET_AMD64)
25 #define USE_TKILL_ON_ANDROID 1
28 #ifdef USE_TKILL_ON_ANDROID
29 extern int tkill (pid_t tid, int signal);
32 #if defined(_POSIX_VERSION) || defined(__native_client__)
36 #include <sys/resource.h>
39 reset_priority (pthread_attr_t *attr)
41 struct sched_param param;
45 memset (¶m, 0, sizeof (param));
47 res = pthread_attr_getschedpolicy (attr, &policy);
49 g_error ("%s: pthread_attr_getschedpolicy failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
51 #ifdef _POSIX_PRIORITY_SCHEDULING
54 /* Necessary to get valid priority range */
56 min = sched_get_priority_min (policy);
57 max = sched_get_priority_max (policy);
59 if (max > 0 && min >= 0 && max > min)
60 param.sched_priority = (max - min) / 2 + min;
67 param.sched_priority = 50;
73 param.sched_priority = 0;
76 g_warning ("%s: unknown policy %d", __func__, policy);
81 res = pthread_attr_setschedparam (attr, ¶m);
83 g_error ("%s: pthread_attr_setschedparam failed, error: \"%s\" (%d)", __func__, g_strerror (res), res);
87 mono_threads_platform_create_thread (MonoThreadStart thread_fn, gpointer thread_data, gsize* const stack_size, MonoNativeThreadId *out_tid)
95 res = pthread_attr_init (&attr);
99 set_stack_size = *stack_size;
103 #ifdef HAVE_PTHREAD_ATTR_SETSTACKSIZE
104 if (set_stack_size == 0) {
105 #if HAVE_VALGRIND_MEMCHECK_H
106 if (RUNNING_ON_VALGRIND)
107 set_stack_size = 1 << 20;
109 set_stack_size = (SIZEOF_VOID_P / 4) * 1024 * 1024;
111 set_stack_size = (SIZEOF_VOID_P / 4) * 1024 * 1024;
115 #ifdef PTHREAD_STACK_MIN
116 if (set_stack_size < PTHREAD_STACK_MIN)
117 set_stack_size = PTHREAD_STACK_MIN;
120 res = pthread_attr_setstacksize (&attr, set_stack_size);
122 #endif /* HAVE_PTHREAD_ATTR_SETSTACKSIZE */
124 reset_priority (&attr);
127 res = pthread_attr_getstacksize (&attr, &min_stack_size);
129 g_error ("%s: pthread_attr_getstacksize failed, error: \"%s\" (%d)", g_strerror (res), res);
131 *stack_size = min_stack_size;
134 /* Actually start the thread */
135 res = mono_gc_pthread_create (&thread, &attr, (gpointer (*)(gpointer)) thread_fn, thread_data);
146 mono_threads_platform_init (void)
151 mono_threads_platform_in_critical_region (MonoNativeThreadId tid)
157 mono_threads_platform_yield (void)
159 return sched_yield () == 0;
163 mono_threads_platform_exit (gsize exit_code)
165 pthread_exit ((gpointer) exit_code);
169 mono_threads_get_max_stack_size (void)
173 /* If getrlimit fails, we don't enforce any limits. */
174 if (getrlimit (RLIMIT_STACK, &lim))
176 /* rlim_t is an unsigned long long on 64bits OSX but we want an int response. */
177 if (lim.rlim_max > (rlim_t)INT_MAX)
179 return (int)lim.rlim_max;
183 mono_threads_pthread_kill (MonoThreadInfo *info, int signum)
185 THREADS_SUSPEND_DEBUG ("sending signal %d to %p[%p]\n", signum, info, mono_thread_info_get_tid (info));
186 #ifdef USE_TKILL_ON_ANDROID
187 int result, old_errno = errno;
188 result = tkill (info->native_handle, signum);
194 #elif defined(__native_client__)
195 /* Workaround pthread_kill abort() in NaCl glibc. */
197 #elif !defined(HAVE_PTHREAD_KILL)
198 g_error ("pthread_kill() is not supported by this platform");
200 return pthread_kill (mono_thread_info_get_tid (info), signum);
205 mono_native_thread_id_get (void)
207 return pthread_self ();
211 mono_native_thread_id_equals (MonoNativeThreadId id1, MonoNativeThreadId id2)
213 return pthread_equal (id1, id2);
217 * mono_native_thread_create:
219 * Low level thread creation function without any GC wrappers.
222 mono_native_thread_create (MonoNativeThreadId *tid, gpointer func, gpointer arg)
224 return pthread_create (tid, NULL, (void *(*)(void *)) func, arg) == 0;
228 mono_native_thread_set_name (MonoNativeThreadId tid, const char *name)
232 * We can't set the thread name for other threads, but we can at least make
233 * it work for threads that try to change their own name.
235 if (tid != mono_native_thread_id_get ())
239 pthread_setname_np ("");
243 strncpy (n, name, 63);
245 pthread_setname_np (n);
247 #elif defined (__NetBSD__)
249 pthread_setname_np (tid, "%s", (void*)"");
251 char n [PTHREAD_MAX_NAMELEN_NP];
253 strncpy (n, name, PTHREAD_MAX_NAMELEN_NP);
254 n [PTHREAD_MAX_NAMELEN_NP - 1] = '\0';
255 pthread_setname_np (tid, "%s", (void*)n);
257 #elif defined (HAVE_PTHREAD_SETNAME_NP)
259 pthread_setname_np (tid, "");
263 strncpy (n, name, 16);
265 pthread_setname_np (tid, n);
271 mono_native_thread_join (MonoNativeThreadId tid)
275 return !pthread_join (tid, &res);
278 #endif /* defined(_POSIX_VERSION) || defined(__native_client__) */
280 #if defined(USE_POSIX_BACKEND)
283 mono_threads_suspend_begin_async_suspend (MonoThreadInfo *info, gboolean interrupt_kernel)
285 int sig = interrupt_kernel ? mono_threads_suspend_get_abort_signal () : mono_threads_suspend_get_suspend_signal ();
287 if (!mono_threads_pthread_kill (info, sig)) {
288 mono_threads_add_to_pending_operation_set (info);
295 mono_threads_suspend_check_suspend_result (MonoThreadInfo *info)
297 return info->suspend_can_continue;
301 This begins async resume. This function must do the following:
303 - Install an async target if one was requested.
304 - Notify the target to resume.
307 mono_threads_suspend_begin_async_resume (MonoThreadInfo *info)
309 int sig = mono_threads_suspend_get_restart_signal ();
311 if (!mono_threads_pthread_kill (info, sig)) {
312 mono_threads_add_to_pending_operation_set (info);
319 mono_threads_suspend_abort_syscall (MonoThreadInfo *info)
321 /* We signal a thread to break it from the current syscall.
322 * This signal should not be interpreted as a suspend request. */
323 info->syscall_break_signal = TRUE;
324 if (mono_threads_pthread_kill (info, mono_threads_suspend_get_abort_signal ()) == 0) {
325 mono_threads_add_to_pending_operation_set (info);
330 mono_threads_suspend_needs_abort_syscall (void)
336 mono_threads_suspend_register (MonoThreadInfo *info)
338 #if defined (PLATFORM_ANDROID)
339 info->native_handle = gettid ();
344 mono_threads_suspend_free (MonoThreadInfo *info)
349 mono_threads_suspend_init (void)
353 #endif /* defined(USE_POSIX_BACKEND) */