2 * sgen-os-mach.c: Mach-OS support.
5 * Paolo Molaro (lupus@ximian.com)
6 * Mark Probst (mprobst@novell.com)
7 * Geoff Norton (gnorton@novell.com)
9 * Copyright 2010 Novell, Inc (http://www.novell.com)
10 * Copyright (C) 2012 Xamarin Inc
12 * This library is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU Library General Public
14 * License 2.0 as published by the Free Software Foundation;
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Library General Public License for more details.
21 * You should have received a copy of the GNU Library General Public
22 * License 2.0 along with this library; if not, write to the Free
23 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
31 #include "sgen/sgen-gc.h"
32 #include "sgen/sgen-archdep.h"
33 #include "sgen/sgen-protocol.h"
34 #include "sgen/sgen-thread-pool.h"
35 #include "metadata/object-internals.h"
36 #include "metadata/gc-internals.h"
39 #include "utils/mach-support.h"
42 #if defined(__MACH__) && MONO_MACH_ARCH_SUPPORTED
44 #if !defined(USE_COOP_GC)
46 sgen_resume_thread (SgenThreadInfo *info)
48 return thread_resume (info->client_info.info.native_handle) == KERN_SUCCESS;
52 sgen_suspend_thread (SgenThreadInfo *info)
54 mach_msg_type_number_t num_state;
62 state = (thread_state_t) alloca (mono_mach_arch_get_thread_state_size ());
63 mctx = (mcontext_t) alloca (mono_mach_arch_get_mcontext_size ());
65 ret = thread_suspend (info->client_info.info.native_handle);
66 if (ret != KERN_SUCCESS)
69 ret = mono_mach_arch_get_thread_state (info->client_info.info.native_handle, state, &num_state);
70 if (ret != KERN_SUCCESS)
73 mono_mach_arch_thread_state_to_mcontext (state, mctx);
74 ctx.uc_mcontext = mctx;
76 info->client_info.stopped_domain = mono_thread_info_tls_get (info, TLS_KEY_DOMAIN);
77 info->client_info.stopped_ip = (gpointer) mono_mach_arch_get_ip (state);
78 info->client_info.stack_start = NULL;
79 stack_start = (char*) mono_mach_arch_get_sp (state) - REDZONE_SIZE;
80 /* If stack_start is not within the limits, then don't set it in info and we will be restarted. */
81 if (stack_start >= info->client_info.stack_start_limit && stack_start <= info->client_info.stack_end) {
82 info->client_info.stack_start = stack_start;
85 mono_sigctx_to_monoctx (&ctx, &info->client_info.ctx);
87 ARCH_COPY_SIGCTX_REGS (&info->client_info.regs, &ctx);
90 g_assert (!info->client_info.stack_start);
94 if (mono_gc_get_gc_callbacks ()->thread_suspend_func)
95 mono_gc_get_gc_callbacks ()->thread_suspend_func (info->client_info.runtime_data, &ctx, NULL);
97 SGEN_LOG (2, "thread %p stopped at %p stack_start=%p", (void*)(gsize)info->client_info.info.native_handle, info->client_info.stopped_ip, info->client_info.stack_start);
98 binary_protocol_thread_suspend ((gpointer)mono_thread_info_get_tid (info), info->client_info.stopped_ip);
104 sgen_wait_for_suspend_ack (int count)
106 /* mach thread_resume is synchronous so we dont need to wait for them */
109 /* LOCKING: assumes the GC lock is held */
111 sgen_thread_handshake (BOOL suspend)
113 SgenThreadInfo *cur_thread = mono_thread_info_current ();
118 cur_thread->client_info.suspend_done = TRUE;
119 FOREACH_THREAD (info) {
120 if (info == cur_thread || sgen_thread_pool_is_thread_pool_thread (mono_thread_info_get_tid (info)))
123 info->client_info.suspend_done = FALSE;
124 if (info->client_info.gc_disabled)
128 if (!sgen_suspend_thread (info))
131 ret = thread_resume (info->client_info.info.native_handle);
132 if (ret != KERN_SUCCESS)
146 mono_gc_get_suspend_signal (void)
152 mono_gc_get_restart_signal (void)