/*
- * sgen-os-mach.c: Simple generational GC.
+ * sgen-os-mach.c: Mach-OS support.
*
* Author:
* Paolo Molaro (lupus@ximian.com)
* Geoff Norton (gnorton@novell.com)
*
* Copyright 2010 Novell, Inc (http://www.novell.com)
+ * Copyright (C) 2012 Xamarin Inc
*
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License 2.0 as published by the Free Software Foundation;
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License 2.0 along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "config.h"
#ifdef HAVE_SGEN_GC
+
+
#include <glib.h>
-#include "metadata/gc-internal.h"
#include "metadata/sgen-gc.h"
#include "metadata/sgen-archdep.h"
+#include "metadata/sgen-protocol.h"
#include "metadata/object-internals.h"
+#include "metadata/gc-internal.h"
#if defined(__MACH__)
#include "utils/mach-support.h"
#endif
-/* LOCKING: assumes the GC lock is held */
#if defined(__MACH__) && MONO_MACH_ARCH_SUPPORTED
-int
-mono_sgen_thread_handshake (int signum)
+gboolean
+sgen_resume_thread (SgenThreadInfo *info)
+{
+ return thread_resume (info->info.native_handle) == KERN_SUCCESS;
+}
+
+gboolean
+sgen_suspend_thread (SgenThreadInfo *info)
{
- task_t task = current_task ();
- thread_port_t cur_thread = mach_thread_self ();
- thread_act_array_t thread_list;
- mach_msg_type_number_t num_threads;
mach_msg_type_number_t num_state;
thread_state_t state;
kern_return_t ret;
ucontext_t ctx;
mcontext_t mctx;
- pthread_t exception_thread = mono_gc_get_mach_exception_thread ();
- SgenThreadInfo *info;
+ gpointer stack_start;
+
+ state = (thread_state_t) alloca (mono_mach_arch_get_thread_state_size ());
+ mctx = (mcontext_t) alloca (mono_mach_arch_get_mcontext_size ());
+
+ ret = thread_suspend (info->info.native_handle);
+ if (ret != KERN_SUCCESS)
+ return FALSE;
+
+ ret = mono_mach_arch_get_thread_state (info->info.native_handle, state, &num_state);
+ if (ret != KERN_SUCCESS)
+ return FALSE;
+
+ mono_mach_arch_thread_state_to_mcontext (state, mctx);
+ ctx.uc_mcontext = mctx;
+
+ info->stopped_domain = mono_thread_info_tls_get (info, TLS_KEY_DOMAIN);
+ info->stopped_ip = (gpointer) mono_mach_arch_get_ip (state);
+ info->stack_start = NULL;
+ stack_start = (char*) mono_mach_arch_get_sp (state) - REDZONE_SIZE;
+ /* If stack_start is not within the limits, then don't set it in info and we will be restarted. */
+ if (stack_start >= info->stack_start_limit && info->stack_start <= info->stack_end) {
+ info->stack_start = stack_start;
+
#ifdef USE_MONO_CTX
- MonoContext monoctx;
+ mono_sigctx_to_monoctx (&ctx, &info->ctx);
#else
- gpointer regs [ARCH_NUM_REGS];
+ ARCH_COPY_SIGCTX_REGS (&info->regs, &ctx);
#endif
- gpointer stack_start;
+ } else {
+ g_assert (!info->stack_start);
+ }
+
+ /* Notify the JIT */
+ if (mono_gc_get_gc_callbacks ()->thread_suspend_func)
+ mono_gc_get_gc_callbacks ()->thread_suspend_func (info->runtime_data, &ctx, NULL);
- int count, i;
+ SGEN_LOG (2, "thread %p stopped at %p stack_start=%p", (void*)(gsize)info->info.native_handle, info->stopped_ip, info->stack_start);
- mono_mach_get_threads (&thread_list, &num_threads);
+ binary_protocol_thread_suspend ((gpointer)mono_thread_info_get_tid (info), info->stopped_ip);
- for (i = 0, count = 0; i < num_threads; i++) {
- thread_port_t t = thread_list [i];
- pthread_t pt = pthread_from_mach_thread_np (t);
- if (t != cur_thread && pt != exception_thread && !mono_sgen_is_worker_thread (pt)) {
- if (signum == suspend_signal_num) {
- ret = thread_suspend (t);
- if (ret != KERN_SUCCESS) {
- mach_port_deallocate (task, t);
- continue;
- }
+ return TRUE;
+}
- state = (thread_state_t) alloca (mono_mach_arch_get_thread_state_size ());
- ret = mono_mach_arch_get_thread_state (t, state, &num_state);
- if (ret != KERN_SUCCESS) {
- mach_port_deallocate (task, t);
- continue;
- }
+void
+sgen_wait_for_suspend_ack (int count)
+{
+ /* mach thread_resume is synchronous so we dont need to wait for them */
+}
+/* LOCKING: assumes the GC lock is held */
+int
+sgen_thread_handshake (BOOL suspend)
+{
+ SgenThreadInfo *cur_thread = mono_thread_info_current ();
+ kern_return_t ret;
+ SgenThreadInfo *info;
- info = mono_sgen_thread_info_lookup (pt);
+ int count = 0;
- /* Ensure that the runtime is aware of this thread */
- if (info != NULL) {
- mctx = (mcontext_t) alloca (mono_mach_arch_get_mcontext_size ());
- mono_mach_arch_thread_state_to_mcontext (state, mctx);
- ctx.uc_mcontext = mctx;
+ cur_thread->suspend_done = TRUE;
+ FOREACH_THREAD_SAFE (info) {
+ if (info == cur_thread || sgen_is_worker_thread (mono_thread_info_get_tid (info)))
+ continue;
- info->stopped_domain = mono_mach_arch_get_tls_value_from_thread (t, mono_pthread_key_for_tls (mono_domain_get_tls_key ()));
- info->stopped_ip = (gpointer) mono_mach_arch_get_ip (state);
- stack_start = (char*) mono_mach_arch_get_sp (state) - REDZONE_SIZE;
- /* If stack_start is not within the limits, then don't set it in info and we will be restarted. */
- if (stack_start >= info->stack_start_limit && info->stack_start <= info->stack_end) {
- info->stack_start = stack_start;
+ info->suspend_done = FALSE;
+ if (info->gc_disabled)
+ continue;
-#ifdef USE_MONO_CTX
- mono_sigctx_to_monoctx (&ctx, &monoctx);
- info->monoctx = &monoctx;
-#else
- ARCH_COPY_SIGCTX_REGS (regs, &ctx);
- info->stopped_regs = regs;
-#endif
- } else {
- g_assert (!info->stack_start);
- }
-
- /* Notify the JIT */
- if (mono_gc_get_gc_callbacks ()->thread_suspend_func)
- mono_gc_get_gc_callbacks ()->thread_suspend_func (info->runtime_data, &ctx);
- }
- } else {
- ret = thread_resume (t);
- if (ret != KERN_SUCCESS) {
- mach_port_deallocate (task, t);
- continue;
- }
- }
- count ++;
-
- mach_port_deallocate (task, t);
+ if (suspend) {
+ if (!sgen_suspend_thread (info))
+ continue;
} else {
- mach_port_deallocate (task, t);
+ ret = thread_resume (info->info.native_handle);
+ if (ret != KERN_SUCCESS)
+ continue;
}
- }
+ count ++;
+ } END_FOREACH_THREAD_SAFE
+ return count;
+}
- mono_mach_free_threads (thread_list, num_threads);
+void
+sgen_os_init (void)
+{
+}
- mach_port_deallocate (task, cur_thread);
+int
+mono_gc_get_suspend_signal (void)
+{
+ return -1;
+}
- return count;
+int
+mono_gc_get_restart_signal (void)
+{
+ return -1;
}
#endif
#endif
projects / mono.git / blobdiff