/* src/threads/native/threads.c - native threads support
- Copyright (C) 1996-2005, 2006 R. Grafl, A. Krall, C. Kruegel,
+ Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
J. Wenninger, Institut f. Computersprachen - TU Wien
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- Contact: cacao@cacaojvm.org
-
- Authors: Stefan Ring
-
- Changes: Christian Thalinger
- Edwin Steiner
-
- $Id: threads.c 5698 2006-10-05 17:28:13Z twisti $
+ $Id: threads.c 7830 2007-04-26 11:14:39Z twisti $
*/
# include "threads/native/generic-primitives.h"
#endif
-#include "mm/boehm.h"
+#include "mm/gc-common.h"
#include "mm/memory.h"
+
+#include "native/jni.h"
#include "native/native.h"
#include "native/include/java_lang_Object.h"
+#include "native/include/java_lang_String.h"
#include "native/include/java_lang_Throwable.h"
#include "native/include/java_lang_Thread.h"
-#include "native/include/java_lang_ThreadGroup.h"
-#include "native/include/java_lang_VMThread.h"
+
+#if defined(ENABLE_JAVASE)
+# include "native/include/java_lang_ThreadGroup.h"
+#endif
+
+#if defined(WITH_CLASSPATH_GNU)
+# include "native/include/java_lang_VMThread.h"
+#endif
+
+#include "threads/lock-common.h"
+#include "threads/threads-common.h"
+
#include "threads/native/threads.h"
+
#include "toolbox/avl.h"
#include "toolbox/logging.h"
+
#include "vm/builtin.h"
#include "vm/exceptions.h"
#include "vm/global.h"
-#include "vm/loader.h"
-#include "vm/options.h"
#include "vm/stringlocal.h"
#include "vm/vm.h"
+
#include "vm/jit/asmpart.h"
+#include "vmcore/options.h"
+
+#if defined(ENABLE_STATISTICS)
+# include "vmcore/statistics.h"
+#endif
+
#if !defined(__DARWIN__)
# if defined(__LINUX__)
# define GC_LINUX_THREADS
# define GC_IRIX_THREADS
# endif
# include <semaphore.h>
-# include "boehm-gc/include/gc.h"
+# if defined(ENABLE_GC_BOEHM)
+# include "mm/boehm-gc/include/gc.h"
+# endif
#endif
#if defined(ENABLE_JVMTI)
#define STOPWORLD_FROM_GC 1
#define STOPWORLD_FROM_CLASS_NUMBERING 2
-#define THREADS_INITIAL_TABLE_SIZE 8
-
/* startupinfo *****************************************************************
/* prototypes *****************************************************************/
-static void threads_table_init(void);
-static s4 threads_table_add(threadobject *thread);
-static void threads_table_remove(threadobject *thread);
static void threads_calc_absolute_time(struct timespec *tm, s8 millis, s4 nanos);
-#if !defined(NDEBUG)
-static void threads_table_dump(FILE *file);
-#endif
/******************************************************************************/
/* GLOBAL VARIABLES */
threadobject *mainthreadobj;
static methodinfo *method_thread_init;
-static methodinfo *method_threadgroup_add;
/* the thread object of the current thread */
/* This is either a thread-local variable defined with __thread, or */
pthread_key_t threads_current_threadobject_key;
#endif
-/* global threads table */
-static threads_table_t threads_table;
-
-/* global compiler mutex */
-static pthread_mutex_rec_t compiler_mutex;
-
/* global mutex for changing the thread list */
static pthread_mutex_t threadlistlock;
/* global mutex for stop-the-world */
static pthread_mutex_t stopworldlock;
+/* global mutex and condition for joining threads on exit */
+static pthread_mutex_t mutex_join;
+static pthread_cond_t cond_join;
+
/* this is one of the STOPWORLD_FROM_ constants, telling why the world is */
/* being stopped */
static volatile int stopworldwhere;
#endif
-/******************************************************************************/
-/* Recursive Mutex Implementation for Darwin */
-/******************************************************************************/
-
-#if defined(MUTEXSIM)
-
-/* We need this for older MacOSX (10.1.x) */
-
-void pthread_mutex_init_rec(pthread_mutex_rec_t *m)
-{
- pthread_mutex_init(&m->mutex, NULL);
- m->count = 0;
-}
-
-void pthread_mutex_destroy_rec(pthread_mutex_rec_t *m)
-{
- pthread_mutex_destroy(&m->mutex);
-}
-
-void pthread_mutex_lock_rec(pthread_mutex_rec_t *m)
-{
- for (;;) {
- if (!m->count)
- {
- pthread_mutex_lock(&m->mutex);
- m->owner = pthread_self();
- m->count++;
- break;
- }
- else {
- if (m->owner != pthread_self()) {
- pthread_mutex_lock(&m->mutex);
- }
- else {
- m->count++;
- break;
- }
- }
- }
-}
-
-void pthread_mutex_unlock_rec(pthread_mutex_rec_t *m)
-{
- if (!--m->count)
- pthread_mutex_unlock(&m->mutex);
-}
-
-#endif /* defined(MUTEXSIM) */
-
-
/* threads_sem_init ************************************************************
Initialize a semaphore. Checks against errors and interruptions.
}
-/* threads_set_thread_priority *************************************************
-
- Set the priority of the given thread.
-
- IN:
- tid..........thread id
- priority.....priority to set
-
-******************************************************************************/
-
-static void threads_set_thread_priority(pthread_t tid, int priority)
-{
- struct sched_param schedp;
- int policy;
-
- pthread_getschedparam(tid, &policy, &schedp);
- schedp.sched_priority = priority;
- pthread_setschedparam(tid, policy, &schedp);
-}
-
-
-/* compiler_lock ***************************************************************
-
- Enter the compiler lock.
-
-******************************************************************************/
-
-void compiler_lock(void)
-{
- pthread_mutex_lock_rec(&compiler_mutex);
-}
-
-
-/* compiler_unlock *************************************************************
-
- Release the compiler lock.
-
-******************************************************************************/
-
-void compiler_unlock(void)
-{
- pthread_mutex_unlock_rec(&compiler_mutex);
-}
-
-
/* lock_stopworld **************************************************************
Enter the stopworld lock, specifying why the world shall be stopped.
kern_return_t r;
r = thread_suspend(thread);
- if (r != KERN_SUCCESS) {
- log_text("thread_suspend failed");
- assert(0);
- }
-
- r = thread_get_state(thread, flavor,
- (natural_t*)&thread_state, &thread_state_count);
- if (r != KERN_SUCCESS) {
- log_text("thread_get_state failed");
- assert(0);
- }
-
- thread_restartcriticalsection(&thread_state);
-
- r = thread_set_state(thread, flavor,
- (natural_t*)&thread_state, thread_state_count);
- if (r != KERN_SUCCESS) {
- log_text("thread_set_state failed");
- assert(0);
- }
+
+ if (r != KERN_SUCCESS)
+ vm_abort("thread_suspend failed");
+
+ r = thread_get_state(thread, flavor, (natural_t *) &thread_state,
+ &thread_state_count);
+
+ if (r != KERN_SUCCESS)
+ vm_abort("thread_get_state failed");
+
+ thread_restartcriticalsection((ucontext_t *) &thread_state);
+
+ r = thread_set_state(thread, flavor, (natural_t *) &thread_state,
+ thread_state_count);
+
+ if (r != KERN_SUCCESS)
+ vm_abort("thread_set_state failed");
}
+
tobj = tobj->next;
} while (tobj != mainthreadobj);
}
kern_return_t r;
r = thread_resume(thread);
- if (r != KERN_SUCCESS) {
- log_text("thread_resume failed");
- assert(0);
- }
+
+ if (r != KERN_SUCCESS)
+ vm_abort("thread_resume failed");
}
+
tobj = tobj->next;
} while (tobj != mainthreadobj);
}
}
#endif
+#if !defined(DISABLE_GC)
+
void threads_cast_stopworld(void)
{
+#if !defined(__DARWIN__) && !defined(__CYGWIN__)
int count, i;
+#endif
+
lock_stopworld(STOPWORLD_FROM_CLASS_NUMBERING);
pthread_mutex_lock(&threadlistlock);
+
#if defined(__DARWIN__)
threads_cast_darwinstop();
#elif defined(__CYGWIN__)
assert(0);
#else
count = threads_cast_sendsignals(GC_signum1(), 0);
- for (i=0; i<count; i++)
+ for (i = 0; i < count; i++)
threads_sem_wait(&suspend_ack);
#endif
+
pthread_mutex_unlock(&threadlistlock);
}
unlock_stopworld();
}
+
#if !defined(__DARWIN__)
static void threads_sigsuspend_handler(ucontext_t *ctx)
{
}
#endif
+#endif /* DISABLE_GC */
+
+
/* threads_set_current_threadobject ********************************************
Set the current thread object.
*******************************************************************************/
-static void threads_set_current_threadobject(threadobject *thread)
+void threads_set_current_threadobject(threadobject *thread)
{
#if !defined(HAVE___THREAD)
- pthread_setspecific(threads_current_threadobject_key, thread);
+ if (pthread_setspecific(threads_current_threadobject_key, thread) != 0)
+ vm_abort("threads_set_current_threadobject: pthread_setspecific failed: %s", strerror(errno));
#else
threads_current_threadobject = thread;
#endif
}
+/* threads_init_threadobject **************************************************
+
+ Initialize implementation fields of a threadobject.
+
+ IN:
+ thread............the threadobject
+
+******************************************************************************/
+
+void threads_init_threadobject(threadobject *thread)
+{
+ /* get the pthread id */
+
+ thread->tid = pthread_self();
+
+ thread->index = 0;
+
+ /* TODO destroy all those things */
+
+ pthread_mutex_init(&(thread->waitmutex), NULL);
+ pthread_cond_init(&(thread->waitcond), NULL);
+
+ thread->interrupted = false;
+ thread->signaled = false;
+ thread->sleeping = false;
+}
+
+
/* threads_get_current_threadobject ********************************************
Return the threadobject of the current thread.
RETURN VALUE:
- the current threadobject * (an instance of java.lang.VMThread)
+ the current threadobject * (an instance of java.lang.Thread)
*******************************************************************************/
}
-/* threads_preinit *************************************************************
+/* threads_impl_preinit ********************************************************
Do some early initialization of stuff required.
+ ATTENTION: Do NOT use any Java heap allocation here, as gc_init()
+ is called AFTER this function!
+
*******************************************************************************/
-void threads_preinit(void)
+void threads_impl_preinit(void)
{
-#ifndef MUTEXSIM
- pthread_mutexattr_t mutexattr;
- pthread_mutexattr_init(&mutexattr);
- pthread_mutexattr_settype(&mutexattr, PTHREAD_MUTEX_RECURSIVE);
- pthread_mutex_init(&compiler_mutex, &mutexattr);
- pthread_mutexattr_destroy(&mutexattr);
-#else
- pthread_mutex_init_rec(&compiler_mutex);
-#endif
-
pthread_mutex_init(&threadlistlock, NULL);
pthread_mutex_init(&stopworldlock, NULL);
- /* Allocate something so the garbage collector's signal handlers
- are installed. */
- heap_allocate(1, false, NULL);
+ /* initialize exit mutex and condition (on exit we join all
+ threads) */
+
+ pthread_mutex_init(&mutex_join, NULL);
+ pthread_cond_init(&cond_join, NULL);
- mainthreadobj = NEW(threadobject);
- mainthreadobj->tid = pthread_self();
- mainthreadobj->index = 1;
- mainthreadobj->thinlock = lock_pre_compute_thinlock(mainthreadobj->index);
-
#if !defined(HAVE___THREAD)
pthread_key_create(&threads_current_threadobject_key, NULL);
#endif
- threads_set_current_threadobject(mainthreadobj);
- threads_sem_init(&suspend_ack, 0, 0);
-
- /* initialize the threads table */
+ /* create internal thread data-structure */
- threads_table_init();
+ mainthreadobj = threads_create_thread();
- /* initialize subsystems */
+ mainthreadobj->object = NULL;
+ mainthreadobj->index = 1;
+ mainthreadobj->thinlock = lock_pre_compute_thinlock(mainthreadobj->index);
- lock_init();
+ /* store the internal thread data-structure in the TSD */
- critical_init();
+ threads_set_current_threadobject(mainthreadobj);
+
+ threads_sem_init(&suspend_ack, 0, 0);
}
bool threads_init(void)
{
- java_lang_String *threadname;
- java_lang_Thread *mainthread;
- java_lang_ThreadGroup *threadgroup;
- threadobject *tempthread;
-
- tempthread = mainthreadobj;
-
- /* XXX We have to find a new way to free lock records */
- /* with the new locking algorithm. */
- /* lock_record_free_pools(mainthreadobj->ee.lockrecordpools); */
+ java_objectheader *threadname;
+ java_lang_Thread *t;
+ java_objectheader *o;
- /* This is kinda tricky, we grow the java.lang.Thread object so we
- can keep the execution environment there. No Thread object must
- have been created at an earlier time. */
+#if defined(ENABLE_JAVASE)
+ java_lang_ThreadGroup *threadgroup;
+ methodinfo *m;
+#endif
- class_java_lang_VMThread->instancesize = sizeof(threadobject);
+#if defined(WITH_CLASSPATH_GNU)
+ java_lang_VMThread *vmt;
+#endif
/* get methods we need in this file */
+#if defined(WITH_CLASSPATH_GNU)
method_thread_init =
class_resolveclassmethod(class_java_lang_Thread,
utf_init,
utf_new_char("(Ljava/lang/VMThread;Ljava/lang/String;IZ)V"),
class_java_lang_Thread,
true);
-
- if (method_thread_init == NULL)
- return false;
-
- method_threadgroup_add =
- class_resolveclassmethod(class_java_lang_ThreadGroup,
- utf_new_char("addThread"),
- utf_new_char("(Ljava/lang/Thread;)V"),
- class_java_lang_ThreadGroup,
+#else
+ method_thread_init =
+ class_resolveclassmethod(class_java_lang_Thread,
+ utf_init,
+ utf_new_char("(Ljava/lang/String;)V"),
+ class_java_lang_Thread,
true);
+#endif
- if (method_threadgroup_add == NULL)
+ if (method_thread_init == NULL)
return false;
- /* create a VMThread */
+ /* create a java.lang.Thread for the main thread */
- mainthreadobj = (threadobject *) builtin_new(class_java_lang_VMThread);
+ t = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
- if (mainthreadobj == NULL)
+ if (t == NULL)
return false;
- FREE(tempthread, threadobject);
+ /* set the object in the internal data structure */
- threads_init_threadobject(&mainthreadobj->o);
+ mainthreadobj->object = t;
- threads_set_current_threadobject(mainthreadobj);
+ /* thread is running */
- lock_init_execution_env(mainthreadobj);
+ mainthreadobj->state = THREAD_STATE_RUNNABLE;
mainthreadobj->next = mainthreadobj;
mainthreadobj->prev = mainthreadobj;
if (opt_intrp) {
MSET(intrp_main_stack, 0, u1, opt_stacksize);
- mainthreadobj->_global_sp = intrp_main_stack + opt_stacksize;
+ mainthreadobj->_global_sp = (Cell*) (intrp_main_stack + opt_stacksize);
}
#endif
threadname = javastring_new(utf_new_char("main"));
+#if defined(ENABLE_JAVASE)
/* allocate and init ThreadGroup */
threadgroup = (java_lang_ThreadGroup *)
native_new_and_init(class_java_lang_ThreadGroup);
- if (!threadgroup)
- throw_exception_exit();
+ if (threadgroup == NULL)
+ return false;
+#endif
+
+#if defined(WITH_CLASSPATH_GNU)
+ /* create a java.lang.VMThread for the main thread */
- /* create a Thread */
+ vmt = (java_lang_VMThread *) builtin_new(class_java_lang_VMThread);
- mainthread = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
+ if (vmt == NULL)
+ return false;
+
+ /* set the thread */
- if (mainthread == NULL)
- throw_exception_exit();
+ vmt->thread = t;
+ vmt->vmdata = (java_lang_Object *) mainthreadobj;
+
+ /* call java.lang.Thread.<init>(Ljava/lang/VMThread;Ljava/lang/String;IZ)V */
+ o = (java_objectheader *) t;
- mainthreadobj->o.thread = mainthread;
+ (void) vm_call_method(method_thread_init, o, vmt, threadname, NORM_PRIORITY,
+ false);
+#elif defined(WITH_CLASSPATH_CLDC1_1)
+ /* set the thread */
- /* call Thread.<init>(Ljava/lang/VMThread;Ljava/lang/String;IZ)V */
+ t->vm_thread = (java_lang_Object *) mainthreadobj;
- (void) vm_call_method(method_thread_init, (java_objectheader *) mainthread,
- mainthreadobj, threadname, NORM_PRIORITY, false);
+ /* call public Thread(String name) */
+
+ o = (java_objectheader *) t;
+
+ (void) vm_call_method(method_thread_init, o, threadname);
+#endif
if (*exceptionptr)
return false;
- mainthread->group = threadgroup;
+#if defined(ENABLE_JAVASE)
+ t->group = threadgroup;
+
+ /* add main thread to java.lang.ThreadGroup */
- /* add mainthread to ThreadGroup */
+ m = class_resolveclassmethod(class_java_lang_ThreadGroup,
+ utf_addThread,
+ utf_java_lang_Thread__V,
+ class_java_lang_ThreadGroup,
+ true);
- (void) vm_call_method(method_threadgroup_add,
- (java_objectheader *) threadgroup,
- mainthread);
+ o = (java_objectheader *) threadgroup;
+
+ (void) vm_call_method(m, o, t);
if (*exceptionptr)
return false;
+#endif
threads_set_thread_priority(pthread_self(), NORM_PRIORITY);
}
-/* threads_table_init *********************************************************
-
- Initialize the global threads table.
-
-******************************************************************************/
-
-static void threads_table_init(void)
-{
- s4 size;
- s4 i;
-
- size = THREADS_INITIAL_TABLE_SIZE;
-
- threads_table.size = size;
- threads_table.table = MNEW(threads_table_entry_t, size);
-
- /* link the entries in a freelist */
-
- for (i=0; i<size; ++i) {
- threads_table.table[i].nextfree = i+1;
- }
-
- /* terminate the freelist */
-
- threads_table.table[size-1].nextfree = 0; /* index 0 is never free */
-}
-
-
-/* threads_table_add **********************************************************
-
- Add a thread to the global threads table. The index is entered in the
- threadobject. The thinlock value for the thread is pre-computed.
-
- IN:
- thread............the thread to add
-
- RETURN VALUE:
- The table index for the newly added thread. This value has also been
- entered in the threadobject.
-
- PRE-CONDITION:
- The caller must hold the threadlistlock!
-
-******************************************************************************/
-
-static s4 threads_table_add(threadobject *thread)
-{
- s4 index;
- s4 oldsize;
- s4 newsize;
- s4 i;
-
- /* table[0] serves as the head of the freelist */
-
- index = threads_table.table[0].nextfree;
-
- /* if we got a free index, use it */
-
- if (index) {
-got_an_index:
- threads_table.table[0].nextfree = threads_table.table[index].nextfree;
- threads_table.table[index].thread = thread;
- thread->index = index;
- thread->thinlock = lock_pre_compute_thinlock(index);
- return index;
- }
-
- /* we must grow the table */
-
- oldsize = threads_table.size;
- newsize = oldsize * 2;
-
- threads_table.table = MREALLOC(threads_table.table, threads_table_entry_t,
- oldsize, newsize);
- threads_table.size = newsize;
-
- /* link the new entries to a free list */
-
- for (i=oldsize; i<newsize; ++i) {
- threads_table.table[i].nextfree = i+1;
- }
-
- /* terminate the freelist */
-
- threads_table.table[newsize-1].nextfree = 0; /* index 0 is never free */
-
- /* use the first of the new entries */
-
- index = oldsize;
- goto got_an_index;
-}
-
-
-/* threads_table_remove *******************************************************
-
- Remove a thread from the global threads table.
-
- IN:
- thread............the thread to remove
-
- PRE-CONDITION:
- The caller must hold the threadlistlock!
-
-******************************************************************************/
-
-static void threads_table_remove(threadobject *thread)
-{
- s4 index;
-
- index = thread->index;
-
- /* put the index into the freelist */
-
- threads_table.table[index] = threads_table.table[0];
- threads_table.table[0].nextfree = index;
-
- /* delete the index in the threadobject to discover bugs */
-#if !defined(NDEBUG)
- thread->index = 0;
-#endif
-}
-
-/* threads_init_threadobject **************************************************
-
- Initialize implementation fields of a java.lang.VMThread.
-
- IN:
- t............the java.lang.VMThread
-
-******************************************************************************/
-
-void threads_init_threadobject(java_lang_VMThread *t)
-{
- threadobject *thread = (threadobject*) t;
-
- thread->tid = pthread_self();
-
- thread->index = 0;
-
- /* TODO destroy all those things */
- pthread_mutex_init(&(thread->joinmutex), NULL);
- pthread_cond_init(&(thread->joincond), NULL);
-
- pthread_mutex_init(&(thread->waitmutex), NULL);
- pthread_cond_init(&(thread->waitcond), NULL);
-
- thread->interrupted = false;
- thread->signaled = false;
- thread->sleeping = false;
-}
-
-
/* threads_startup_thread ******************************************************
Thread startup function called by pthread_create.
static void *threads_startup_thread(void *t)
{
- startupinfo *startup;
- threadobject *thread;
- sem_t *psem;
- threadobject *tnext;
- methodinfo *method;
- functionptr function;
+ startupinfo *startup;
+ threadobject *thread;
+#if defined(WITH_CLASSPATH_GNU)
+ java_lang_VMThread *vmt;
+#endif
+ sem_t *psem;
+ threadobject *tnext;
+ classinfo *c;
+ methodinfo *m;
+ java_objectheader *o;
+ functionptr function;
#if defined(ENABLE_INTRP)
u1 *intrp_thread_stack;
* to return. */
threads_sem_wait(startup->psem_first);
- /* set the thread object */
-
#if defined(__DARWIN__)
thread->mach_thread = mach_thread_self();
#endif
+
+ /* store the internal thread data-structure in the TSD */
+
threads_set_current_threadobject(thread);
+ /* thread is running */
+
+ thread->state = THREAD_STATE_RUNNABLE;
+
/* insert the thread into the threadlist and the threads table */
pthread_mutex_lock(&threadlistlock);
pthread_mutex_unlock(&threadlistlock);
- /* init data structures of this thread */
-
- lock_init_execution_env(thread);
-
/* tell threads_startup_thread that we registered ourselves */
/* CAUTION: *startup becomes invalid with this! */
/* set our priority */
- threads_set_thread_priority(thread->tid, thread->o.thread->priority);
+ threads_set_thread_priority(thread->tid, thread->object->priority);
#if defined(ENABLE_INTRP)
/* set interpreter stack */
if (opt_intrp)
- thread->_global_sp = (void *) (intrp_thread_stack + opt_stacksize);
+ thread->_global_sp = (Cell *) (intrp_thread_stack + opt_stacksize);
#endif
#if defined(ENABLE_JVMTI)
thread->flags |= THREAD_FLAG_JAVA;
- method = class_resolveclassmethod(thread->o.header.vftbl->class,
- utf_run,
- utf_void__void,
- thread->o.header.vftbl->class,
- true);
+#if defined(WITH_CLASSPATH_GNU)
+ /* We need to start the run method of
+ java.lang.VMThread. Since this is a final class, we can use
+ the class object directly. */
+
+ c = class_java_lang_VMThread;
+#elif defined(WITH_CLASSPATH_CLDC1_1)
+ c = thread->object->header.vftbl->class;
+#endif
+
+ m = class_resolveclassmethod(c, utf_run, utf_void__void, c, true);
+
+ if (m == NULL)
+ vm_abort("threads_startup_thread: run() method not found in class");
+
+ /* set ThreadMXBean variables */
+
+ _Jv_jvm->java_lang_management_ThreadMXBean_ThreadCount++;
+ _Jv_jvm->java_lang_management_ThreadMXBean_TotalStartedThreadCount++;
+
+ if (_Jv_jvm->java_lang_management_ThreadMXBean_ThreadCount >
+ _Jv_jvm->java_lang_management_ThreadMXBean_PeakThreadCount)
+ _Jv_jvm->java_lang_management_ThreadMXBean_PeakThreadCount =
+ _Jv_jvm->java_lang_management_ThreadMXBean_ThreadCount;
+
+#if defined(WITH_CLASSPATH_GNU)
+ /* we need to start the run method of java.lang.VMThread */
- if (method == NULL)
- throw_exception();
+ vmt = (java_lang_VMThread *) thread->object->vmThread;
+ o = (java_objectheader *) vmt;
- /* increase total started thread count */
+#elif defined(WITH_CLASSPATH_CLDC1_1)
+ o = (java_objectheader *) thread->object;
+#endif
- _Jv_jvm->total_started_thread_count++;
+ /* run the thread */
- (void) vm_call_method(method, (java_objectheader *) thread);
+ (void) vm_call_method(m, o);
}
else {
/* this is an internal thread */
thread->flags |= THREAD_FLAG_INTERNAL;
- /* increase total started thread count */
+ /* set ThreadMXBean variables */
+
+ _Jv_jvm->java_lang_management_ThreadMXBean_ThreadCount++;
+ _Jv_jvm->java_lang_management_ThreadMXBean_TotalStartedThreadCount++;
- _Jv_jvm->total_started_thread_count++;
+ if (_Jv_jvm->java_lang_management_ThreadMXBean_ThreadCount >
+ _Jv_jvm->java_lang_management_ThreadMXBean_PeakThreadCount)
+ _Jv_jvm->java_lang_management_ThreadMXBean_PeakThreadCount =
+ _Jv_jvm->java_lang_management_ThreadMXBean_ThreadCount;
/* call passed function, e.g. finalizer_thread */
jvmti_ThreadStartEnd(JVMTI_EVENT_THREAD_END);
#endif
- threads_detach_thread(thread);
+ if (!threads_detach_thread(thread))
+ vm_abort("threads_startup_thread: threads_detach_thread failed");
+
+ /* set ThreadMXBean variables */
+
+ _Jv_jvm->java_lang_management_ThreadMXBean_ThreadCount--;
return NULL;
}
/* threads_start_thread ********************************************************
- Start a thread in the JVM.
+ Start a thread in the JVM. Both (vm internal and java) thread objects exist.
IN:
- t............the java.lang.Thread object
+ thread.......the thread object
function.....function to run in the new thread. NULL means that the
"run" method of the object `t` should be called
******************************************************************************/
-void threads_start_thread(java_lang_Thread *t, functionptr function)
+void threads_start_thread(threadobject *thread, functionptr function)
{
sem_t sem;
sem_t sem_first;
pthread_attr_t attr;
startupinfo startup;
- threadobject *thread;
-
- thread = (threadobject *) t->vmThread;
/* fill startupinfo structure passed by pthread_create to
* threads_startup_thread */
/* create the thread */
- if (pthread_create(&thread->tid, &attr, threads_startup_thread, &startup))
+ if (pthread_create(&(thread->tid), &attr, threads_startup_thread, &startup))
vm_abort("pthread_create failed: %s", strerror(errno));
/* signal that pthread_create has returned, so thread->tid is valid */
}
+/* threads_set_thread_priority *************************************************
+
+ Set the priority of the given thread.
+
+ IN:
+ tid..........thread id
+ priority.....priority to set
+
+******************************************************************************/
+
+void threads_set_thread_priority(pthread_t tid, int priority)
+{
+ struct sched_param schedp;
+ int policy;
+
+ pthread_getschedparam(tid, &policy, &schedp);
+ schedp.sched_priority = priority;
+ pthread_setschedparam(tid, policy, &schedp);
+}
+
+
/* threads_attach_current_thread ***********************************************
Attaches the current thread to the VM. Used in JNI.
bool threads_attach_current_thread(JavaVMAttachArgs *vm_aargs, bool isdaemon)
{
threadobject *thread;
- java_lang_Thread *t;
utf *u;
- java_lang_String *s;
- java_lang_ThreadGroup *group;
+ java_objectheader *s;
java_objectheader *o;
+ java_lang_Thread *t;
- /* create a java.lang.VMThread object */
+#if defined(ENABLE_JAVASE)
+ java_lang_ThreadGroup *group;
+ methodinfo *m;
+#endif
+
+#if defined(WITH_CLASSPATH_GNU)
+ java_lang_VMThread *vmt;
+#endif
+
+ /* create internal thread data-structure */
- thread = (threadobject *) builtin_new(class_java_lang_VMThread);
+ thread = threads_create_thread();
- if (thread == NULL)
+ /* create a java.lang.Thread object */
+
+ t = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
+
+ if (t == NULL)
return false;
- threads_init_threadobject(&thread->o);
- threads_set_current_threadobject(thread);
- lock_init_execution_env(thread);
+ thread->object = t;
+
+ /* thread is running */
+
+ thread->state = THREAD_STATE_RUNNABLE;
/* insert the thread into the threadlist and the threads table */
pthread_mutex_unlock(&threadlistlock);
- /* mark main thread as Java thread */
+ /* mark thread as Java thread */
thread->flags = THREAD_FLAG_JAVA;
+ if (isdaemon)
+ thread->flags |= THREAD_FLAG_DAEMON;
+
#if defined(ENABLE_INTRP)
/* create interpreter stack */
if (opt_intrp) {
MSET(intrp_main_stack, 0, u1, opt_stacksize);
- t->_global_sp = intrp_main_stack + opt_stacksize;
+ thread->_global_sp = (Cell *) (intrp_main_stack + opt_stacksize);
}
#endif
- /* create a java.lang.Thread object */
+#if defined(WITH_CLASSPATH_GNU)
+ /* create a java.lang.VMThread object */
- t = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
+ vmt = (java_lang_VMThread *) builtin_new(class_java_lang_VMThread);
- if (t == NULL)
+ if (vmt == NULL)
return false;
- thread->o.thread = t;
+ /* set the thread */
+
+ vmt->thread = t;
+ vmt->vmdata = (java_lang_Object *) thread;
+#elif defined(WITH_CLASSPATH_CLDC1_1)
+ t->vm_thread = (java_lang_Object *) thread;
+#endif
if (vm_aargs != NULL) {
u = utf_new_char(vm_aargs->name);
+#if defined(ENABLE_JAVASE)
group = (java_lang_ThreadGroup *) vm_aargs->group;
+#endif
}
else {
u = utf_null;
- group = mainthreadobj->o.thread->group;
+#if defined(ENABLE_JAVASE)
+ group = mainthreadobj->object->group;
+#endif
}
+ /* the the thread name */
+
s = javastring_new(u);
- o = (java_objectheader *) t;
+ /* for convenience */
+
+ o = (java_objectheader *) thread->object;
- (void) vm_call_method(method_thread_init, o, thread, s, NORM_PRIORITY,
+#if defined(WITH_CLASSPATH_GNU)
+ (void) vm_call_method(method_thread_init, o, vmt, s, NORM_PRIORITY,
isdaemon);
+#elif defined(WITH_CLASSPATH_CLDC1_1)
+ (void) vm_call_method(method_thread_init, o, s);
+#endif
if (*exceptionptr)
return false;
+#if defined(ENABLE_JAVASE)
/* store the thread group in the object */
- t->group = group;
+ thread->object->group = group;
+
+ /* add thread to given thread-group */
+
+ m = class_resolveclassmethod(group->header.vftbl->class,
+ utf_addThread,
+ utf_java_lang_Thread__V,
+ class_java_lang_ThreadGroup,
+ true);
o = (java_objectheader *) group;
- (void) vm_call_method(method_threadgroup_add, o, t);
+ (void) vm_call_method(m, o, t);
if (*exceptionptr)
return false;
+#endif
return true;
}
bool threads_detach_thread(threadobject *thread)
{
- java_lang_Thread *t;
+#if defined(ENABLE_JAVASE)
java_lang_ThreadGroup *group;
methodinfo *m;
java_objectheader *o;
+ java_lang_Thread *t;
+#endif
/* Allow lock record pools to be used by other threads. They
cannot be deleted so we'd better not waste them. */
/* XXX implement uncaught exception stuff (like JamVM does) */
+#if defined(ENABLE_JAVASE)
/* remove thread from the thread group */
- t = thread->o.thread;
- group = t->group;
+ group = thread->object->group;
/* XXX TWISTI: should all threads be in a ThreadGroup? */
return false;
o = (java_objectheader *) group;
+ t = thread->object;
(void) vm_call_method(m, o, t);
if (*exceptionptr)
return false;
}
+#endif
+
+ /* thread is terminated */
- /* remove thread from thread list and threads table, do this
- inside a lock */
+ thread->state = THREAD_STATE_TERMINATED;
+
+ /* lock thread list */
pthread_mutex_lock(&threadlistlock);
+ /* remove thread from thread list and threads table */
+
thread->next->prev = thread->prev;
thread->prev->next = thread->next;
threads_table_remove(thread);
+ /* unlock thread list */
+
pthread_mutex_unlock(&threadlistlock);
- /* reset thread id (lock on joinmutex? TWISTI) */
+ /* signal that this thread has finished */
- pthread_mutex_lock(&thread->joinmutex);
- thread->tid = 0;
- pthread_mutex_unlock(&thread->joinmutex);
+ pthread_mutex_lock(&mutex_join);
+ pthread_cond_signal(&cond_join);
+ pthread_mutex_unlock(&mutex_join);
- /* tell everyone that a thread has finished */
+ /* free the vm internal thread object */
- pthread_cond_broadcast(&thread->joincond);
+#if defined(ENABLE_GC_BOEHM)
+ GCFREE(thread);
+#else
+ FREE(thread, threadobject);
+#endif
+
+#if defined(ENABLE_STATISTICS)
+ if (opt_stat)
+ size_threadobject -= sizeof(threadobject);
+#endif
return true;
}
*******************************************************************************/
-/* At the end of the program, we wait for all running non-daemon
- threads to die. */
-
-static threadobject *threads_find_non_daemon_thread(threadobject *thread)
+static threadobject *threads_find_non_daemon_thread(void)
{
+ threadobject *thread;
+
+ /* lock the thread list */
+
+ pthread_mutex_lock(&threadlistlock);
+
+ /* iterate over all threads */
+
+ thread = mainthreadobj->next;
+
while (thread != mainthreadobj) {
- if (!thread->o.thread->daemon)
+ if (!(thread->flags & THREAD_FLAG_DAEMON)) {
+ /* unlock thread list */
+
+ pthread_mutex_unlock(&threadlistlock);
+
return thread;
- thread = thread->prev;
+ }
+
+ thread = thread->next;
}
+ /* unlock thread list */
+
+ pthread_mutex_unlock(&threadlistlock);
+
return NULL;
}
{
threadobject *thread;
- pthread_mutex_lock(&threadlistlock);
+ /* get current thread */
- while ((thread = threads_find_non_daemon_thread(mainthreadobj->prev)) != NULL) {
+ thread = THREADOBJECT;
- pthread_mutex_lock(&thread->joinmutex);
+ /* this thread is waiting for all non-daemon threads to exit */
- pthread_mutex_unlock(&threadlistlock);
+ thread->state = THREAD_STATE_WAITING;
- while (thread->tid)
- pthread_cond_wait(&thread->joincond, &thread->joinmutex);
+ /* enter join mutex */
- pthread_mutex_unlock(&thread->joinmutex);
+ pthread_mutex_lock(&mutex_join);
- pthread_mutex_lock(&threadlistlock);
- }
+ /* wait for condition as long as we have non-daemon threads */
- pthread_mutex_unlock(&threadlistlock);
+ while (threads_find_non_daemon_thread() != NULL)
+ pthread_cond_wait(&cond_join, &mutex_join);
+
+ /* leave join mutex */
+
+ pthread_mutex_unlock(&mutex_join);
}
*******************************************************************************/
-static bool threads_wait_with_timeout(threadobject *t,
+static bool threads_wait_with_timeout(threadobject *thread,
struct timespec *wakeupTime)
{
bool wasinterrupted;
/* acquire the waitmutex */
- pthread_mutex_lock(&t->waitmutex);
+ pthread_mutex_lock(&thread->waitmutex);
/* mark us as sleeping */
- t->sleeping = true;
+ thread->sleeping = true;
/* wait on waitcond */
if (wakeupTime->tv_sec || wakeupTime->tv_nsec) {
/* with timeout */
- while (!t->interrupted && !t->signaled
+ while (!thread->interrupted && !thread->signaled
&& threads_current_time_is_earlier_than(wakeupTime))
{
- pthread_cond_timedwait(&t->waitcond, &t->waitmutex, wakeupTime);
+ thread->state = THREAD_STATE_TIMED_WAITING;
+
+ pthread_cond_timedwait(&thread->waitcond, &thread->waitmutex,
+ wakeupTime);
+
+ thread->state = THREAD_STATE_RUNNABLE;
}
}
else {
/* no timeout */
- while (!t->interrupted && !t->signaled)
- pthread_cond_wait(&t->waitcond, &t->waitmutex);
+ while (!thread->interrupted && !thread->signaled) {
+ thread->state = THREAD_STATE_WAITING;
+
+ pthread_cond_wait(&thread->waitcond, &thread->waitmutex);
+
+ thread->state = THREAD_STATE_RUNNABLE;
+ }
}
/* check if we were interrupted */
- wasinterrupted = t->interrupted;
+ wasinterrupted = thread->interrupted;
/* reset all flags */
- t->interrupted = false;
- t->signaled = false;
- t->sleeping = false;
+ thread->interrupted = false;
+ thread->signaled = false;
+ thread->sleeping = false;
/* release the waitmutex */
- pthread_mutex_unlock(&t->waitmutex);
+ pthread_mutex_unlock(&thread->waitmutex);
return wasinterrupted;
}
*******************************************************************************/
-bool threads_wait_with_timeout_relative(threadobject *t,
- s8 millis,
+bool threads_wait_with_timeout_relative(threadobject *thread, s8 millis,
s4 nanos)
{
struct timespec wakeupTime;
/* wait */
- return threads_wait_with_timeout(t, &wakeupTime);
+ return threads_wait_with_timeout(thread, &wakeupTime);
}
}
-/* threads_interrupt_thread ****************************************************
+/* threads_thread_interrupt ****************************************************
Interrupt the given thread.
*******************************************************************************/
-void threads_interrupt_thread(java_lang_VMThread *thread)
+void threads_thread_interrupt(threadobject *thread)
{
- threadobject *t = (threadobject*) thread;
+ /* Signal the thread a "waitcond" and tell it that it has been
+ interrupted. */
+
+ pthread_mutex_lock(&thread->waitmutex);
+
+ /* Interrupt blocking system call using a signal. */
+
+ pthread_kill(thread->tid, SIGHUP);
- /* signal the thread a "waitcond" and tell it that it has been */
- /* interrupted */
+ if (thread->sleeping)
+ pthread_cond_signal(&thread->waitcond);
- pthread_mutex_lock(&t->waitmutex);
- if (t->sleeping)
- pthread_cond_signal(&t->waitcond);
- t->interrupted = true;
- pthread_mutex_unlock(&t->waitmutex);
+ thread->interrupted = true;
+
+ pthread_mutex_unlock(&thread->waitmutex);
}
bool threads_check_if_interrupted_and_reset(void)
{
- threadobject *t;
+ threadobject *thread;
bool intr;
- t = (threadobject*) THREADOBJECT;
+ thread = THREADOBJECT;
+
+ /* get interrupted flag */
- intr = t->interrupted;
+ intr = thread->interrupted;
- t->interrupted = false;
+ /* reset interrupted flag */
+
+ thread->interrupted = false;
return intr;
}
-/* threads_thread_has_been_interrupted *********************************************************
+/* threads_thread_has_been_interrupted *****************************************
Check if the given thread has been interrupted
*******************************************************************************/
-bool threads_thread_has_been_interrupted(java_lang_VMThread *thread)
+bool threads_thread_has_been_interrupted(threadobject *thread)
{
- threadobject *t;
-
- t = (threadobject*) thread;
-
- return t->interrupted;
+ return thread->interrupted;
}
void threads_sleep(s8 millis, s4 nanos)
{
- threadobject *t;
- struct timespec wakeupTime;
- bool wasinterrupted;
+ threadobject *thread;
+ struct timespec wakeupTime;
+ bool wasinterrupted;
- t = (threadobject *) THREADOBJECT;
+ thread = THREADOBJECT;
threads_calc_absolute_time(&wakeupTime, millis, nanos);
- wasinterrupted = threads_wait_with_timeout(t, &wakeupTime);
+ wasinterrupted = threads_wait_with_timeout(thread, &wakeupTime);
if (wasinterrupted)
- *exceptionptr = new_exception(string_java_lang_InterruptedException);
+ exceptions_throw_interruptedexception();
}
-/* threads_yield *****************************************************************
+/* threads_yield ***************************************************************
Yield to the scheduler.
}
-/* threads_java_lang_Thread_set_priority ***********************************************************
-
- Set the priority for the given java.lang.Thread.
-
- IN:
- t............the java.lang.Thread
- priority.....the priority
-
-*******************************************************************************/
-
-void threads_java_lang_Thread_set_priority(java_lang_Thread *t, s4 priority)
-{
- threadobject *thread;
-
- thread = (threadobject*) t->vmThread;
-
- threads_set_thread_priority(thread->tid, priority);
-}
-
-
-/* threads_dump ****************************************************************
-
- Dumps info for all threads running in the JVM. This function is
- called when SIGQUIT (<ctrl>-\) is sent to CACAO.
-
-*******************************************************************************/
-
-void threads_dump(void)
-{
- threadobject *tobj;
- java_lang_VMThread *vmt;
- java_lang_Thread *t;
- utf *name;
-
- tobj = mainthreadobj;
-
- printf("Full thread dump CACAO "VERSION":\n");
-
- /* iterate over all started threads */
-
- do {
- /* get thread objects */
-
- vmt = &tobj->o;
- t = vmt->thread;
-
- /* the thread may be currently in initalization, don't print it */
-
- if (t) {
- /* get thread name */
-
- name = javastring_toutf(t->name, false);
-
- printf("\n\"");
- utf_display_printable_ascii(name);
- printf("\" ");
-
- if (t->daemon)
- printf("daemon ");
-
-#if SIZEOF_VOID_P == 8
- printf("prio=%d tid=0x%016lx\n", t->priority, tobj->tid);
-#else
- printf("prio=%d tid=0x%08lx\n", t->priority, tobj->tid);
-#endif
-
- /* send SIGUSR1 to thread to print stacktrace */
-
- pthread_kill(tobj->tid, SIGUSR1);
-
- /* sleep this thread a bit, so the signal can reach the thread */
-
- threads_sleep(10, 0);
- }
-
- tobj = tobj->next;
- } while (tobj && (tobj != mainthreadobj));
-}
-
-
-/* threads_table_dump *********************************************************
-
- Dump the threads table for debugging purposes.
-
- IN:
- file..............stream to write to
-
-******************************************************************************/
-
-#if !defined(NDEBUG)
-static void threads_table_dump(FILE *file)
-{
- s4 i;
- s4 size;
- ptrint index;
-
- pthread_mutex_lock(&threadlistlock);
-
- size = threads_table.size;
-
- fprintf(file, "======== THREADS TABLE (size %d) ========\n", size);
-
- for (i=0; i<size; ++i) {
- index = threads_table.table[i].nextfree;
-
- fprintf(file, "%4d: ", i);
-
- if (index < size) {
- fprintf(file, "free, nextfree = %d\n", index);
- }
- else {
- fprintf(file, "thread %p\n", (void*) threads_table.table[i].thread);
- }
- }
-
- fprintf(file, "======== END OF THREADS TABLE ========\n");
-
- pthread_mutex_unlock(&threadlistlock);
-}
-#endif
-
/*
* These are local overrides for various environment variables in Emacs.
* Please do not remove this and leave it at the end of the file, where