#include <mono/utils/mono-semaphore.h>
#include <mono/utils/mono-threads.h>
#include <mono/utils/mono-tls.h>
+#include <mono/utils/mono-mmap.h>
+#include <mono/metadata/threads-types.h>
+#include <limits.h>
#include <errno.h>
-#if defined(_POSIX_VERSION)
+#if defined(PLATFORM_ANDROID)
+extern int tkill (pid_t tid, int signal);
+#endif
+
+#if defined(_POSIX_VERSION) || defined(__native_client__)
+#include <sys/resource.h>
+#include <signal.h>
+
+#if defined(__native_client__)
+void nacl_shutdown_gc_thread(void);
+#endif
typedef struct {
void *(*start_routine)(void*);
void *arg;
int flags;
MonoSemType registered;
-} ThreadStartInfo;
-
+ HANDLE handle;
+} StartInfo;
static void*
inner_start_thread (void *arg)
{
- ThreadStartInfo *start_info = arg;
+ StartInfo *start_info = arg;
void *t_arg = start_info->arg;
- int post_result;
+ int res;
void *(*start_func)(void*) = start_info->start_routine;
+ guint32 flags = start_info->flags;
void *result;
+ HANDLE handle;
+ MonoThreadInfo *info;
+
+ /* Register the thread with the io-layer */
+ handle = wapi_create_thread_handle ();
+ if (!handle) {
+ res = MONO_SEM_POST (&(start_info->registered));
+ g_assert (!res);
+ return NULL;
+ }
+ start_info->handle = handle;
+
+ info = mono_thread_info_attach (&result);
+ info->runtime_thread = TRUE;
+ info->handle = handle;
+
+ if (flags & CREATE_SUSPENDED) {
+ info->create_suspended = TRUE;
+ MONO_SEM_INIT (&info->create_suspended_sem, 0);
+ }
- mono_thread_info_attach (&result);
+ /* start_info is not valid after this */
+ res = MONO_SEM_POST (&(start_info->registered));
+ g_assert (!res);
+ start_info = NULL;
- post_result = MONO_SEM_POST (&(start_info->registered));
- g_assert (!post_result);
+ if (flags & CREATE_SUSPENDED) {
+ while (MONO_SEM_WAIT (&info->create_suspended_sem) != 0 &&
+ errno == EINTR);
+ MONO_SEM_DESTROY (&info->create_suspended_sem);
+ }
+ /* Run the actual main function of the thread */
result = start_func (t_arg);
- g_assert (!mono_domain_get ());
+ /*
+ mono_thread_info_detach ();
+ */
+
+#if defined(__native_client__)
+ nacl_shutdown_gc_thread();
+#endif
+
+ wapi_thread_handle_set_exited (handle, GPOINTER_TO_UINT (result));
+ /* This is needed by mono_threads_core_unregister () which is called later */
+ info->handle = NULL;
+ g_assert (mono_threads_get_callbacks ()->thread_exit);
+ mono_threads_get_callbacks ()->thread_exit (NULL);
+ g_assert_not_reached ();
return result;
}
+HANDLE
+mono_threads_core_create_thread (LPTHREAD_START_ROUTINE start_routine, gpointer arg, guint32 stack_size, guint32 creation_flags, MonoNativeThreadId *out_tid)
+{
+ pthread_attr_t attr;
+ int res;
+ pthread_t thread;
+ StartInfo start_info;
+
+ res = pthread_attr_init (&attr);
+ g_assert (!res);
+
+ if (stack_size == 0) {
+#if HAVE_VALGRIND_MEMCHECK_H
+ if (RUNNING_ON_VALGRIND)
+ stack_size = 1 << 20;
+ else
+ stack_size = (SIZEOF_VOID_P / 4) * 1024 * 1024;
+#else
+ stack_size = (SIZEOF_VOID_P / 4) * 1024 * 1024;
+#endif
+ }
+
+#ifdef PTHREAD_STACK_MIN
+ if (stack_size < PTHREAD_STACK_MIN)
+ stack_size = PTHREAD_STACK_MIN;
+#endif
+
+#ifdef HAVE_PTHREAD_ATTR_SETSTACKSIZE
+ res = pthread_attr_setstacksize (&attr, stack_size);
+ g_assert (!res);
+#endif
+
+ memset (&start_info, 0, sizeof (StartInfo));
+ start_info.start_routine = (gpointer)start_routine;
+ start_info.arg = arg;
+ start_info.flags = creation_flags;
+ MONO_SEM_INIT (&(start_info.registered), 0);
+
+ /* Actually start the thread */
+ res = mono_threads_get_callbacks ()->mono_gc_pthread_create (&thread, &attr, inner_start_thread, &start_info);
+ if (res) {
+ MONO_SEM_DESTROY (&(start_info.registered));
+ return NULL;
+ }
+
+ /* Wait until the thread register itself in various places */
+ while (MONO_SEM_WAIT (&(start_info.registered)) != 0) {
+ /*if (EINTR != errno) ABORT("sem_wait failed"); */
+ }
+ MONO_SEM_DESTROY (&(start_info.registered));
+
+ if (out_tid)
+ *out_tid = thread;
+
+ return start_info.handle;
+}
+
+/*
+ * mono_threads_core_resume_created:
+ *
+ * Resume a newly created thread created using CREATE_SUSPENDED.
+ */
+void
+mono_threads_core_resume_created (MonoThreadInfo *info, MonoNativeThreadId tid)
+{
+ MONO_SEM_POST (&info->create_suspended_sem);
+}
+
+gboolean
+mono_threads_core_yield (void)
+{
+ return sched_yield () == 0;
+}
+
+void
+mono_threads_core_exit (int exit_code)
+{
+ MonoThreadInfo *current = mono_thread_info_current ();
+
+#if defined(__native_client__)
+ nacl_shutdown_gc_thread();
+#endif
+
+ wapi_thread_handle_set_exited (current->handle, exit_code);
+
+ g_assert (mono_threads_get_callbacks ()->thread_exit);
+ mono_threads_get_callbacks ()->thread_exit (NULL);
+}
+
+void
+mono_threads_core_unregister (MonoThreadInfo *info)
+{
+ if (info->handle) {
+ wapi_thread_handle_set_exited (info->handle, 0);
+ info->handle = NULL;
+ }
+}
+
+HANDLE
+mono_threads_core_open_handle (void)
+{
+ MonoThreadInfo *info;
+
+ info = mono_thread_info_current ();
+ g_assert (info);
+
+ if (!info->handle)
+ info->handle = wapi_create_thread_handle ();
+ else
+ wapi_ref_thread_handle (info->handle);
+ return info->handle;
+}
+
int
-mono_threads_pthread_create (pthread_t *new_thread, const pthread_attr_t *attr, void *(*start_routine)(void *), void *arg)
-{
- ThreadStartInfo *start_info;
- int result;
-
- start_info = g_malloc0 (sizeof (ThreadStartInfo));
- if (!start_info)
- return ENOMEM;
- MONO_SEM_INIT (&(start_info->registered), 0);
- start_info->arg = arg;
- start_info->start_routine = start_routine;
-
- result = pthread_create (new_thread, attr, inner_start_thread, start_info);
- if (result == 0) {
- while (MONO_SEM_WAIT (&(start_info->registered)) != 0) {
- /*if (EINTR != errno) ABORT("sem_wait failed"); */
- }
+mono_threads_get_max_stack_size (void)
+{
+ struct rlimit lim;
+
+ /* If getrlimit fails, we don't enforce any limits. */
+ if (getrlimit (RLIMIT_STACK, &lim))
+ return INT_MAX;
+ /* rlim_t is an unsigned long long on 64bits OSX but we want an int response. */
+ if (lim.rlim_max > (rlim_t)INT_MAX)
+ return INT_MAX;
+ return (int)lim.rlim_max;
+}
+
+HANDLE
+mono_threads_core_open_thread_handle (HANDLE handle, MonoNativeThreadId tid)
+{
+ wapi_ref_thread_handle (handle);
+
+ return handle;
+}
+
+#if !defined (__MACH__)
+
+#if !defined(__native_client__)
+static void
+suspend_signal_handler (int _dummy, siginfo_t *info, void *context)
+{
+ MonoThreadInfo *current = mono_thread_info_current ();
+ gboolean ret;
+
+ if (current->syscall_break_signal) {
+ current->syscall_break_signal = FALSE;
+ return;
+ }
+
+ ret = mono_threads_get_runtime_callbacks ()->thread_state_init_from_sigctx (¤t->suspend_state, context);
+
+ /* thread_state_init_from_sigctx return FALSE if the current thread is detaching and suspend can't continue. */
+ current->suspend_can_continue = ret;
+
+ MONO_SEM_POST (¤t->begin_suspend_semaphore);
+
+ /* This thread is doomed, all we can do is give up and let the suspender recover. */
+ if (!ret)
+ return;
+
+ while (MONO_SEM_WAIT (¤t->resume_semaphore) != 0) {
+ /*if (EINTR != errno) ABORT("sem_wait failed"); */
+ }
+
+ if (current->async_target) {
+#if MONO_ARCH_HAS_MONO_CONTEXT
+ MonoContext tmp = current->suspend_state.ctx;
+ mono_threads_get_runtime_callbacks ()->setup_async_callback (&tmp, current->async_target, current->user_data);
+ current->async_target = current->user_data = NULL;
+ mono_monoctx_to_sigctx (&tmp, context);
+#else
+ g_error ("The new interruption machinery requires a working mono-context");
+#endif
+ }
+
+ MONO_SEM_POST (¤t->finish_resume_semaphore);
+}
+#endif
+
+static void
+mono_posix_add_signal_handler (int signo, gpointer handler)
+{
+#if !defined(__native_client__)
+ /*FIXME, move the code from mini to utils and do the right thing!*/
+ struct sigaction sa;
+ struct sigaction previous_sa;
+ int ret;
+
+ sa.sa_sigaction = handler;
+ sigemptyset (&sa.sa_mask);
+ sa.sa_flags = SA_SIGINFO;
+ ret = sigaction (signo, &sa, &previous_sa);
+
+ g_assert (ret != -1);
+#endif
+}
+
+void
+mono_threads_init_platform (void)
+{
+#if !defined(__native_client__)
+ /*
+ FIXME we should use all macros from mini to make this more portable
+ FIXME it would be very sweet if sgen could end up using this too.
+ */
+ if (mono_thread_info_new_interrupt_enabled ())
+ mono_posix_add_signal_handler (mono_thread_get_abort_signal (), suspend_signal_handler);
+#endif
+}
+
+/*nothing to be done here since suspend always abort syscalls due using signals*/
+void
+mono_threads_core_interrupt (MonoThreadInfo *info)
+{
+}
+
+int
+mono_threads_pthread_kill (MonoThreadInfo *info, int signum)
+{
+#if defined (PLATFORM_ANDROID)
+ int result, old_errno = errno;
+ result = tkill (info->native_handle, signum);
+ if (result < 0) {
+ result = errno;
+ errno = old_errno;
}
- MONO_SEM_DESTROY (&(start_info->registered));
- g_free (start_info);
return result;
+#elif defined(__native_client__)
+ /* Workaround pthread_kill abort() in NaCl glibc. */
+ return 0;
+#else
+ return pthread_kill (mono_thread_info_get_tid (info), signum);
+#endif
+
+}
+
+void
+mono_threads_core_abort_syscall (MonoThreadInfo *info)
+{
+ /*
+ We signal a thread to break it from the urrent syscall.
+ This signal should not be interpreted as a suspend request.
+ */
+ info->syscall_break_signal = TRUE;
+ mono_threads_pthread_kill (info, mono_thread_get_abort_signal ());
+}
+
+gboolean
+mono_threads_core_needs_abort_syscall (void)
+{
+ return TRUE;
+}
+
+gboolean
+mono_threads_core_suspend (MonoThreadInfo *info)
+{
+ /*FIXME, check return value*/
+ mono_threads_pthread_kill (info, mono_thread_get_abort_signal ());
+ while (MONO_SEM_WAIT (&info->begin_suspend_semaphore) != 0) {
+ /* g_assert (errno == EINTR); */
+ }
+ return info->suspend_can_continue;
+}
+
+gboolean
+mono_threads_core_resume (MonoThreadInfo *info)
+{
+ MONO_SEM_POST (&info->resume_semaphore);
+ while (MONO_SEM_WAIT (&info->finish_resume_semaphore) != 0) {
+ /* g_assert (errno == EINTR); */
+ }
+
+ return TRUE;
+}
+
+void
+mono_threads_platform_register (MonoThreadInfo *info)
+{
+ MONO_SEM_INIT (&info->begin_suspend_semaphore, 0);
+
+#if defined (PLATFORM_ANDROID)
+ info->native_handle = (gpointer) gettid ();
+#endif
+}
+
+void
+mono_threads_platform_free (MonoThreadInfo *info)
+{
+ MONO_SEM_DESTROY (&info->begin_suspend_semaphore);
+}
+
+MonoNativeThreadId
+mono_native_thread_id_get (void)
+{
+ return pthread_self ();
+}
+
+gboolean
+mono_native_thread_id_equals (MonoNativeThreadId id1, MonoNativeThreadId id2)
+{
+ return pthread_equal (id1, id2);
+}
+
+/*
+ * mono_native_thread_create:
+ *
+ * Low level thread creation function without any GC wrappers.
+ */
+gboolean
+mono_native_thread_create (MonoNativeThreadId *tid, gpointer func, gpointer arg)
+{
+ return pthread_create (tid, NULL, func, arg) == 0;
+}
+
+void
+mono_threads_core_set_name (MonoNativeThreadId tid, const char *name)
+{
+#ifdef HAVE_PTHREAD_SETNAME_NP
+ if (!name) {
+ pthread_setname_np (tid, "");
+ } else {
+ char n [16];
+
+ strncpy (n, name, 16);
+ n [15] = '\0';
+ pthread_setname_np (tid, n);
+ }
+#endif
}
+#endif /*!defined (__MACH__)*/
#endif
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