2 * mono-threads-mach.c: Low-level threading, mach 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-mmap.h>
20 #if defined (USE_MACH_BACKEND)
22 #include <mono/utils/mach-support.h>
23 #include <mono/utils/mono-compiler.h>
24 #include <mono/utils/mono-semaphore.h>
25 #include <mono/utils/mono-threads.h>
26 #include <mono/utils/hazard-pointer.h>
29 mono_threads_init_platform (void)
31 mono_threads_init_dead_letter ();
35 mono_threads_core_interrupt (MonoThreadInfo *info)
37 thread_abort (info->native_handle);
41 mono_threads_core_abort_syscall (MonoThreadInfo *info)
44 ret = thread_suspend (info->native_handle);
45 if (ret != KERN_SUCCESS)
48 thread_abort_safely (info->native_handle);
49 thread_resume (info->native_handle);
53 mono_threads_core_needs_abort_syscall (void)
59 mono_threads_core_begin_async_suspend (MonoThreadInfo *info, gboolean interrupt_kernel)
66 ret = thread_suspend (info->native_handle);
67 THREADS_SUSPEND_DEBUG ("SUSPEND %p -> %d\n", (void*)info->native_handle, ret);
68 if (ret != KERN_SUCCESS)
71 /* We're in the middle of a self-suspend, resume and register */
72 if (!mono_threads_transition_finish_async_suspend (info)) {
73 mono_threads_add_to_pending_operation_set (info);
74 g_assert (thread_resume (info->native_handle) == KERN_SUCCESS);
75 THREADS_SUSPEND_DEBUG ("FAILSAFE RESUME/1 %p -> %d\n", (void*)info->native_handle, 0);
76 //XXX interrupt_kernel doesn't make sense in this case as the target is not in a syscall
79 res = mono_threads_get_runtime_callbacks ()->
80 thread_state_init_from_handle (&info->thread_saved_state [ASYNC_SUSPEND_STATE_INDEX], info);
81 THREADS_SUSPEND_DEBUG ("thread state %p -> %d\n", (void*)info->native_handle, res);
84 thread_abort (info->native_handle);
86 mono_threads_transition_async_suspend_compensation (info);
87 g_assert (thread_resume (info->native_handle) == KERN_SUCCESS);
88 THREADS_SUSPEND_DEBUG ("FAILSAFE RESUME/2 %p -> %d\n", (void*)info->native_handle, 0);
94 mono_threads_core_check_suspend_result (MonoThreadInfo *info)
100 mono_threads_core_begin_async_resume (MonoThreadInfo *info)
104 if (info->async_target) {
105 MonoContext tmp = info->thread_saved_state [ASYNC_SUSPEND_STATE_INDEX].ctx;
106 mach_msg_type_number_t num_state;
107 thread_state_t state;
111 mono_threads_get_runtime_callbacks ()->setup_async_callback (&tmp, info->async_target, info->user_data);
112 info->async_target = info->user_data = NULL;
114 state = (thread_state_t) alloca (mono_mach_arch_get_thread_state_size ());
115 mctx = (mcontext_t) alloca (mono_mach_arch_get_mcontext_size ());
117 ret = mono_mach_arch_get_thread_state (info->native_handle, state, &num_state);
118 if (ret != KERN_SUCCESS)
121 mono_mach_arch_thread_state_to_mcontext (state, mctx);
123 g_assert_not_reached ();
125 uctx.uc_mcontext = mctx;
127 mono_monoctx_to_sigctx (&tmp, &uctx);
129 mono_mach_arch_mcontext_to_thread_state (mctx, state);
131 ret = mono_mach_arch_set_thread_state (info->native_handle, state, num_state);
132 if (ret != KERN_SUCCESS)
136 ret = thread_resume (info->native_handle);
137 THREADS_SUSPEND_DEBUG ("RESUME %p -> %d\n", (void*)info->native_handle, ret);
139 return ret == KERN_SUCCESS;
143 mono_threads_platform_register (MonoThreadInfo *info)
145 info->native_handle = mach_thread_self ();
146 mono_threads_install_dead_letter ();
150 mono_threads_platform_free (MonoThreadInfo *info)
152 mach_port_deallocate (current_task (), info->native_handle);
156 mono_native_thread_id_get (void)
158 return pthread_self ();
162 mono_native_thread_id_equals (MonoNativeThreadId id1, MonoNativeThreadId id2)
164 return pthread_equal (id1, id2);
168 * mono_native_thread_create:
170 * Low level thread creation function without any GC wrappers.
173 mono_native_thread_create (MonoNativeThreadId *tid, gpointer func, gpointer arg)
175 return pthread_create (tid, NULL, func, arg) == 0;
179 mono_threads_core_set_name (MonoNativeThreadId tid, const char *name)
181 /* pthread_setnmae_np() on Mac is not documented and doesn't receive thread id. */
183 #endif /* USE_MACH_BACKEND */
187 mono_threads_core_get_stack_bounds (guint8 **staddr, size_t *stsize)
189 *staddr = (guint8*)pthread_get_stackaddr_np (pthread_self());
190 *stsize = pthread_get_stacksize_np (pthread_self());
194 * Mavericks reports stack sizes as 512kb:
195 * http://permalink.gmane.org/gmane.comp.java.openjdk.hotspot.devel/11590
196 * https://bugs.openjdk.java.net/browse/JDK-8020753
198 if (pthread_main_np () && *stsize == 512 * 1024)
199 *stsize = 2048 * mono_pagesize ();
202 /* staddr points to the start of the stack, not the end */