-/*
+ /*
* mono-threads.c: Coop threading
*
* Author:
* Copyright 2015 Xamarin, Inc (http://www.xamarin.com)
*/
+#include <config.h>
+
+/* enable pthread extensions */
+#ifdef TARGET_MACH
+#define _DARWIN_C_SOURCE
+#endif
+
#include <mono/utils/mono-compiler.h>
#include <mono/utils/mono-semaphore.h>
#include <mono/utils/mono-threads.h>
#include <mono/utils/mono-mmap.h>
#include <mono/utils/atomic.h>
#include <mono/utils/mono-time.h>
+#include <mono/utils/mono-counters.h>
+#include <mono/utils/mono-threads-coop.h>
+
+#ifdef TARGET_OSX
+#include <mono/utils/mach-support.h>
+#endif
-#ifdef USE_COOP_BACKEND
+#ifdef _MSC_VER
+// TODO: Find MSVC replacement for __builtin_unwind_init
+#define SAVE_REGS_ON_STACK g_assert_not_reached ();
+#else
+#define SAVE_REGS_ON_STACK __builtin_unwind_init ();
+#endif
volatile size_t mono_polling_required;
+static int coop_reset_blocking_count;
+static int coop_try_blocking_count;
+static int coop_do_blocking_count;
+static int coop_do_polling_count;
+static int coop_save_count;
+
void
mono_threads_state_poll (void)
{
MonoThreadInfo *info;
+ g_assert (mono_threads_is_coop_enabled ());
+
+ ++coop_do_polling_count;
+
info = mono_thread_info_current_unchecked ();
if (!info)
return;
if (!(info->thread_state & (STATE_ASYNC_SUSPEND_REQUESTED | STATE_SELF_SUSPEND_REQUESTED)))
return;
- g_assert (mono_threads_get_runtime_callbacks ()->thread_state_init_from_sigctx (&info->thread_saved_state [SELF_SUSPEND_STATE_INDEX], NULL));
+ ++coop_save_count;
+ mono_threads_get_runtime_callbacks ()->thread_state_init (&info->thread_saved_state [SELF_SUSPEND_STATE_INDEX]);
/* commit the saved state and notify others if needed */
switch (mono_threads_transition_state_poll (info)) {
}
}
+static void *
+return_stack_ptr ()
+{
+ int i;
+ return &i;
+}
+
+static void
+copy_stack_data (MonoThreadInfo *info, void* stackdata_begin)
+{
+ MonoThreadUnwindState *state;
+ int stackdata_size;
+ void* stackdata_end = return_stack_ptr ();
+
+ SAVE_REGS_ON_STACK;
+
+ state = &info->thread_saved_state [SELF_SUSPEND_STATE_INDEX];
+
+ stackdata_size = (char*)stackdata_begin - (char*)stackdata_end;
+ if (stackdata_size <= 0)
+ g_error ("stackdata_size = %d, but must be > 0, stackdata_begin = %p, stackdata_end = %p", stackdata_size, stackdata_begin, stackdata_end);
+
+ g_byte_array_set_size (info->stackdata, stackdata_size);
+ state->gc_stackdata = info->stackdata->data;
+ memcpy (state->gc_stackdata, stackdata_end, stackdata_size);
+
+ state->gc_stackdata_size = stackdata_size;
+}
+
void*
-mono_threads_prepare_blocking (void)
+mono_threads_prepare_blocking (void* stackdata)
{
MonoThreadInfo *info;
+ if (!mono_threads_is_coop_enabled ())
+ return NULL;
+
+ ++coop_do_blocking_count;
+
info = mono_thread_info_current_unchecked ();
/* If the thread is not attached, it doesn't make sense prepare for suspend. */
if (!info || !mono_thread_info_is_live (info)) {
return NULL;
}
+ copy_stack_data (info, stackdata);
+
retry:
- /*The JIT might not be able to save*/
- if (!mono_threads_get_runtime_callbacks ()->thread_state_init_from_sigctx (&info->thread_saved_state [SELF_SUSPEND_STATE_INDEX], NULL)) {
- THREADS_SUSPEND_DEBUG ("PREPARE-BLOCKING failed %p to save thread state\n", mono_thread_info_get_tid (info));
- return NULL;
- }
+ ++coop_save_count;
+ mono_threads_get_runtime_callbacks ()->thread_state_init (&info->thread_saved_state [SELF_SUSPEND_STATE_INDEX]);
switch (mono_threads_transition_do_blocking (info)) {
case DoBlockingContinue:
}
void
-mono_threads_finish_blocking (void *cookie)
+mono_threads_finish_blocking (void *cookie, void* stackdata)
{
static gboolean warned_about_bad_transition;
- MonoThreadInfo *info = cookie;
+ MonoThreadInfo *info;
+
+ if (!mono_threads_is_coop_enabled ())
+ return;
+ info = cookie;
if (!info)
return;
void*
-mono_threads_reset_blocking_start (void)
+mono_threads_reset_blocking_start (void* stackdata)
{
- MonoThreadInfo *info = mono_thread_info_current_unchecked ();
+ MonoThreadInfo *info;
+ if (!mono_threads_is_coop_enabled ())
+ return NULL;
+
+ ++coop_reset_blocking_count;
+
+ info = mono_thread_info_current_unchecked ();
/* If the thread is not attached, it doesn't make sense prepare for suspend. */
if (!info || !mono_thread_info_is_live (info))
return NULL;
+ copy_stack_data (info, stackdata);
+
switch (mono_threads_transition_abort_blocking (info)) {
case AbortBlockingIgnore:
info->thread_saved_state [SELF_SUSPEND_STATE_INDEX].valid = FALSE;
}
void
-mono_threads_reset_blocking_end (void *cookie)
+mono_threads_reset_blocking_end (void *cookie, void* stackdata)
{
- MonoThreadInfo *info = cookie;
+ MonoThreadInfo *info;
+
+ if (!mono_threads_is_coop_enabled ())
+ return;
+ info = cookie;
if (!info)
return;
g_assert (info == mono_thread_info_current_unchecked ());
- mono_threads_prepare_blocking ();
+ mono_threads_prepare_blocking (stackdata);
}
void*
-mono_threads_try_prepare_blocking (void)
+mono_threads_try_prepare_blocking (void* stackdata)
{
MonoThreadInfo *info;
+ if (!mono_threads_is_coop_enabled ())
+ return NULL;
+
+ ++coop_try_blocking_count;
+
info = mono_thread_info_current_unchecked ();
/* If the thread is not attached, it doesn't make sense prepare for suspend. */
if (!info || !mono_thread_info_is_live (info) || mono_thread_info_current_state (info) == STATE_BLOCKING) {
return NULL;
}
+ copy_stack_data (info, stackdata);
+
retry:
- /*The JIT might not be able to save*/
- if (!mono_threads_get_runtime_callbacks ()->thread_state_init_from_sigctx (&info->thread_saved_state [SELF_SUSPEND_STATE_INDEX], NULL)) {
- THREADS_SUSPEND_DEBUG ("PREPARE-TRY-BLOCKING failed %p to save thread state\n", mono_thread_info_get_tid (info));
- return NULL;
- }
+ ++coop_save_count;
+ mono_threads_get_runtime_callbacks ()->thread_state_init (&info->thread_saved_state [SELF_SUSPEND_STATE_INDEX]);
switch (mono_threads_transition_do_blocking (info)) {
case DoBlockingContinue:
}
void
-mono_threads_finish_try_blocking (void* cookie)
-{
- mono_threads_finish_blocking (cookie);
-}
-
-void
-mono_threads_core_abort_syscall (MonoThreadInfo *info)
-{
- g_error ("FIXME");
-}
-
-gboolean
-mono_threads_core_begin_async_resume (MonoThreadInfo *info)
-{
- g_error ("FIXME");
- return FALSE;
-}
-
-gboolean
-mono_threads_core_begin_async_suspend (MonoThreadInfo *info, gboolean interrupt_kernel)
-{
- mono_threads_add_to_pending_operation_set (info);
- /* There's nothing else to do after we async request the thread to suspend */
- return TRUE;
-}
-
-gboolean
-mono_threads_core_check_suspend_result (MonoThreadInfo *info)
+mono_threads_finish_try_blocking (void* cookie, void* stackdata)
{
- /* Async suspend can't async fail on coop */
- return TRUE;
-}
+ if (!mono_threads_is_coop_enabled ())
+ return;
-gboolean
-mono_threads_core_needs_abort_syscall (void)
-{
- /*
- Small digression.
- Syscall abort can't be handled by the suspend machinery even though it's kind of implemented
- in a similar way (with, like, signals).
-
- So, having it here is wrong, it should be on mono-threads-(mach|posix|windows).
- Ideally we would slice this in (coop|preemp) and target. Then have this file set:
- mono-threads-mach, mono-threads-mach-preempt and mono-threads-mach-coop.
- More files, less ifdef hell.
- */
- return FALSE;
+ mono_threads_finish_blocking (cookie, stackdata);
}
void
-mono_threads_init_platform (void)
+mono_threads_init_coop (void)
{
+ if (!mono_threads_is_coop_enabled ())
+ return;
+
+ mono_counters_register ("Coop Reset Blocking", MONO_COUNTER_GC | MONO_COUNTER_INT, &coop_reset_blocking_count);
+ mono_counters_register ("Coop Try Blocking", MONO_COUNTER_GC | MONO_COUNTER_INT, &coop_try_blocking_count);
+ mono_counters_register ("Coop Do Blocking", MONO_COUNTER_GC | MONO_COUNTER_INT, &coop_do_blocking_count);
+ mono_counters_register ("Coop Do Polling", MONO_COUNTER_GC | MONO_COUNTER_INT, &coop_do_polling_count);
+ mono_counters_register ("Coop Save Count", MONO_COUNTER_GC | MONO_COUNTER_INT, &coop_save_count);
//See the above for what's wrong here.
}
void
-mono_threads_platform_free (MonoThreadInfo *info)
+mono_threads_coop_begin_global_suspend (void)
{
- //See the above for what's wrong here.
+ if (mono_threads_is_coop_enabled ())
+ mono_polling_required = 1;
}
void
-mono_threads_platform_register (MonoThreadInfo *info)
+mono_threads_coop_end_global_suspend (void)
{
- //See the above for what's wrong here.
+ if (mono_threads_is_coop_enabled ())
+ mono_polling_required = 0;
}
-void
-mono_threads_core_begin_global_suspend (void)
+void*
+mono_threads_enter_gc_unsafe_region (void* stackdata)
{
- mono_polling_required = 1;
+ if (!mono_threads_is_coop_enabled ())
+ return NULL;
+
+ return mono_threads_reset_blocking_start (stackdata);
}
void
-mono_threads_core_end_global_suspend (void)
+mono_threads_exit_gc_unsafe_region (void *regions_cookie, void* stackdata)
{
- mono_polling_required = 0;
-}
-
+ if (!mono_threads_is_coop_enabled ())
+ return;
-#endif
\ No newline at end of file
+ mono_threads_reset_blocking_end (regions_cookie, stackdata);
+}
projects / mono.git / blobdiff