/* 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 4903 2006-05-11 12:48:43Z edwin $
+ $Id: threads.c 8321 2007-08-16 11:37:25Z michi $
*/
#include "config.h"
+/* XXX cleanup these includes */
+
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <pthread.h>
-#include <semaphore.h>
#include "vm/types.h"
#include "arch.h"
-#ifndef USE_MD_THREAD_STUFF
-#include "machine-instr.h"
+#if !defined(USE_FAKE_ATOMIC_INSTRUCTIONS)
+# include "machine-instr.h"
#else
-#include "threads/native/generic-primitives.h"
+# include "threads/native/generic-primitives.h"
#endif
-#include "mm/boehm.h"
+#include "mm/gc-common.h"
#include "mm/memory.h"
+
+#if defined(ENABLE_GC_CACAO)
+# include "mm/cacao-gc/gc.h"
+#endif
+
+#include "native/jni.h"
+#include "native/llni.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"
-#if !defined(__DARWIN__)
-#if defined(__LINUX__)
-#define GC_LINUX_THREADS
-#elif defined(__MIPS__)
-#define GC_IRIX_THREADS
+#include "vmcore/options.h"
+
+#if defined(ENABLE_STATISTICS)
+# include "vmcore/statistics.h"
#endif
-#include "boehm-gc/include/gc.h"
+
+#if !defined(__DARWIN__)
+# if defined(__LINUX__)
+# define GC_LINUX_THREADS
+# elif defined(__MIPS__)
+# define GC_IRIX_THREADS
+# endif
+# include <semaphore.h>
+# if defined(ENABLE_GC_BOEHM)
+# include "mm/boehm-gc/include/gc.h"
+# endif
#endif
-#ifdef USE_MD_THREAD_STUFF
-pthread_mutex_t _atomic_add_lock = PTHREAD_MUTEX_INITIALIZER;
-pthread_mutex_t _cas_lock = PTHREAD_MUTEX_INITIALIZER;
-pthread_mutex_t _mb_lock = PTHREAD_MUTEX_INITIALIZER;
+#if defined(ENABLE_JVMTI)
+#include "native/jvmti/cacaodbg.h"
#endif
-/******************************************************************************/
-/* Recursive Mutex Implementation for Darwin */
-/******************************************************************************/
+#if defined(__DARWIN__)
+/* Darwin has no working semaphore implementation. This one is taken
+ from Boehm-GC. */
-#ifdef MUTEXSIM
+/*
+ This is a very simple semaphore implementation for darwin. It
+ is implemented in terms of pthreads calls so it isn't async signal
+ safe. This isn't a problem because signals aren't used to
+ suspend threads on darwin.
+*/
+
+static int sem_init(sem_t *sem, int pshared, int value)
+{
+ if (pshared)
+ assert(0);
-/* We need this for older MacOSX (10.1.x) */
+ sem->value = value;
+
+ if (pthread_mutex_init(&sem->mutex, NULL) < 0)
+ return -1;
-typedef struct {
- pthread_mutex_t mutex;
- pthread_t owner;
- int count;
-} pthread_mutex_rec_t;
+ if (pthread_cond_init(&sem->cond, NULL) < 0)
+ return -1;
-static void pthread_mutex_init_rec(pthread_mutex_rec_t *m)
-{
- pthread_mutex_init(&m->mutex, NULL);
- m->count = 0;
+ return 0;
}
-static void pthread_mutex_destroy_rec(pthread_mutex_rec_t *m)
+static int sem_post(sem_t *sem)
{
- pthread_mutex_destroy(&m->mutex);
+ if (pthread_mutex_lock(&sem->mutex) < 0)
+ return -1;
+
+ sem->value++;
+
+ if (pthread_cond_signal(&sem->cond) < 0) {
+ pthread_mutex_unlock(&sem->mutex);
+ return -1;
+ }
+
+ if (pthread_mutex_unlock(&sem->mutex) < 0)
+ return -1;
+
+ return 0;
}
-static void pthread_mutex_lock_rec(pthread_mutex_rec_t *m)
+static int sem_wait(sem_t *sem)
{
- 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;
- }
- }
+ if (pthread_mutex_lock(&sem->mutex) < 0)
+ return -1;
+
+ while (sem->value == 0) {
+ pthread_cond_wait(&sem->cond, &sem->mutex);
}
+
+ sem->value--;
+
+ if (pthread_mutex_unlock(&sem->mutex) < 0)
+ return -1;
+
+ return 0;
}
-static void pthread_mutex_unlock_rec(pthread_mutex_rec_t *m)
+static int sem_destroy(sem_t *sem)
{
- if (!--m->count)
- pthread_mutex_unlock(&m->mutex);
+ if (pthread_cond_destroy(&sem->cond) < 0)
+ return -1;
+
+ if (pthread_mutex_destroy(&sem->mutex) < 0)
+ return -1;
+
+ return 0;
}
+#endif /* defined(__DARWIN__) */
+
+
+/* internally used constants **************************************************/
+
+/* CAUTION: Do not change these values. Boehm GC code depends on them. */
+#define STOPWORLD_FROM_GC 1
+#define STOPWORLD_FROM_CLASS_NUMBERING 2
+
-#else /* MUTEXSIM */
+/* startupinfo *****************************************************************
+
+ Struct used to pass info from threads_start_thread to
+ threads_startup_thread.
+
+******************************************************************************/
+
+typedef struct {
+ threadobject *thread; /* threadobject for this thread */
+ functionptr function; /* function to run in the new thread */
+ sem_t *psem; /* signals when thread has been entered */
+ /* in the thread list */
+ sem_t *psem_first; /* signals when pthread_create has returned */
+} startupinfo;
+
+
+/* prototypes *****************************************************************/
+
+static void threads_calc_absolute_time(struct timespec *tm, s8 millis, s4 nanos);
+
+
+/******************************************************************************/
+/* GLOBAL VARIABLES */
+/******************************************************************************/
+
+static methodinfo *method_thread_init;
+
+/* the thread object of the current thread */
+/* This is either a thread-local variable defined with __thread, or */
+/* a thread-specific value stored with key threads_current_threadobject_key. */
+#if defined(HAVE___THREAD)
+__thread threadobject *threads_current_threadobject;
+#else
+pthread_key_t threads_current_threadobject_key;
+#endif
+
+/* global mutex for the threads table */
+static pthread_mutex_t mutex_threads_list;
+
+/* 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;
+
+/* XXX We disable that whole bunch of code until we have the exact-GC
+ running. */
+
+#if 1
+
+/* this is one of the STOPWORLD_FROM_ constants, telling why the world is */
+/* being stopped */
+static volatile int stopworldwhere;
-#define pthread_mutex_lock_rec pthread_mutex_lock
-#define pthread_mutex_unlock_rec pthread_mutex_unlock
-#define pthread_mutex_rec_t pthread_mutex_t
+/* semaphore used for acknowleding thread suspension */
+static sem_t suspend_ack;
+#if defined(__MIPS__)
+static pthread_mutex_t suspend_ack_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t suspend_cond = PTHREAD_COND_INITIALIZER;
+#endif
+
+#endif /* 0 */
+
+/* mutexes used by the fake atomic instructions */
+#if defined(USE_FAKE_ATOMIC_INSTRUCTIONS)
+pthread_mutex_t _atomic_add_lock = PTHREAD_MUTEX_INITIALIZER;
+pthread_mutex_t _cas_lock = PTHREAD_MUTEX_INITIALIZER;
+pthread_mutex_t _mb_lock = PTHREAD_MUTEX_INITIALIZER;
+#endif
-#endif /* MUTEXSIM */
/* threads_sem_init ************************************************************
return;
} while (errno == EINTR);
- fprintf(stderr,"error: sem_init returned unexpected error %d: %s\n",
- errno, strerror(errno));
- abort();
+ vm_abort("sem_init failed: %s", strerror(errno));
}
+
/* threads_sem_wait ************************************************************
Wait for a semaphore, non-interruptible.
return;
} while (errno == EINTR);
- fprintf(stderr,"error: sem_wait returned unexpected error %d: %s\n",
- errno, strerror(errno));
- abort();
+ vm_abort("sem_wait failed: %s", strerror(errno));
}
+
/* threads_sem_post ************************************************************
Increase the count of a semaphore. Checks for errors.
if (r == 0)
return;
- fprintf(stderr,"error: sem_post returned unexpected error %d: %s\n",
- errno, strerror(errno));
- abort();
+ vm_abort("sem_post failed: %s", strerror(errno));
}
-/* threads_set_thread_priority *************************************************
- Set the priority of the given thread.
+/* lock_stopworld **************************************************************
+
+ Enter the stopworld lock, specifying why the world shall be stopped.
IN:
- tid..........thread id
- priority.....priority to set
+ where........ STOPWORLD_FROM_GC (1) from within GC
+ STOPWORLD_FROM_CLASS_NUMBERING (2) class numbering
******************************************************************************/
-static void threads_set_thread_priority(pthread_t tid, int priority)
+void lock_stopworld(int where)
{
- struct sched_param schedp;
- int policy;
-
- pthread_getschedparam(tid, &policy, &schedp);
- schedp.sched_priority = priority;
- pthread_setschedparam(tid, policy, &schedp);
+ pthread_mutex_lock(&stopworldlock);
+/* stopworldwhere = where; */
}
-static avl_tree *criticaltree;
-threadobject *mainthreadobj;
-
-#ifndef HAVE___THREAD
-pthread_key_t tkey_threadinfo;
-#else
-__thread threadobject *threadobj;
-#endif
+/* unlock_stopworld ************************************************************
-static pthread_mutex_rec_t compiler_mutex;
+ Release the stopworld lock.
-void compiler_lock()
-{
- pthread_mutex_lock_rec(&compiler_mutex);
-}
+******************************************************************************/
-void compiler_unlock()
+void unlock_stopworld(void)
{
- pthread_mutex_unlock_rec(&compiler_mutex);
+/* stopworldwhere = 0; */
+ pthread_mutex_unlock(&stopworldlock);
}
-static s4 criticalcompare(const void *pa, const void *pb)
-{
- const threadcritnode *na = pa;
- const threadcritnode *nb = pb;
-
- if (na->mcodebegin < nb->mcodebegin)
- return -1;
- if (na->mcodebegin > nb->mcodebegin)
- return 1;
- return 0;
-}
+/* XXX We disable that whole bunch of code until we have the exact-GC
+ running. */
+#if 0
-static const threadcritnode *findcritical(u1 *mcodeptr)
+#if !defined(__DARWIN__)
+/* Caller must hold threadlistlock */
+static s4 threads_cast_sendsignals(s4 sig)
{
- avl_node *n;
- const threadcritnode *m;
-
- n = criticaltree->root;
- m = NULL;
-
- if (!n)
- return NULL;
-
- for (;;) {
- const threadcritnode *d = n->data;
-
- if (mcodeptr == d->mcodebegin)
- return d;
-
- if (mcodeptr < d->mcodebegin) {
- if (n->childs[0]) {
- n = n->childs[0];
- }
- else {
- return m;
- }
- }
- else {
- if (n->childs[1]) {
- m = n->data;
- n = n->childs[1];
- }
- else {
- return n->data;
- }
- }
- }
-}
-
+ threadobject *t;
+ threadobject *self;
+ s4 count;
-void thread_registercritical(threadcritnode *n)
-{
- avl_insert(criticaltree, n);
-}
+ self = THREADOBJECT;
-u1 *thread_checkcritical(u1 *mcodeptr)
-{
- const threadcritnode *n = findcritical(mcodeptr);
- return (n && mcodeptr < n->mcodeend && mcodeptr > n->mcodebegin) ? n->mcoderestart : NULL;
-}
+ /* iterate over all started threads */
-static void thread_addstaticcritical()
-{
- /* XXX TWISTI: this is just a quick hack */
-#if defined(ENABLE_JIT)
- threadcritnode *n = &asm_criticalsections;
+ count = 0;
- while (n->mcodebegin)
- thread_registercritical(n++);
-#endif
-}
+ for (t = threads_list_first(); t != NULL; t = threads_list_next(t)) {
+ /* don't send the signal to ourself */
-static pthread_mutex_t threadlistlock;
+ if (t == self)
+ continue;
-static pthread_mutex_t stopworldlock;
-volatile int stopworldwhere;
+ /* don't send the signal to NEW threads (because they are not
+ completely initialized) */
-static sem_t suspend_ack;
-#if defined(__MIPS__)
-static pthread_mutex_t suspend_ack_lock = PTHREAD_MUTEX_INITIALIZER;
-static pthread_cond_t suspend_cond = PTHREAD_COND_INITIALIZER;
-#endif
+ if (t->state == THREAD_STATE_NEW)
+ continue;
-/*
- * where - 1 from within GC
- 2 class numbering
- */
-void lock_stopworld(int where)
-{
- pthread_mutex_lock(&stopworldlock);
- stopworldwhere = where;
-}
+ /* send the signal */
-void unlock_stopworld()
-{
- stopworldwhere = 0;
- pthread_mutex_unlock(&stopworldlock);
-}
+ pthread_kill(t->tid, sig);
-#if !defined(__DARWIN__)
-/* Caller must hold threadlistlock */
-static int cast_sendsignals(int sig, int count)
-{
- /* Count threads */
- threadobject *tobj = mainthreadobj;
- nativethread *infoself = THREADINFO;
+ /* increase threads count */
- if (count == 0) {
- do {
- count++;
- tobj = tobj->info.next;
- } while (tobj != mainthreadobj);
+ count++;
}
- do {
- nativethread *info = &tobj->info;
- if (info != infoself)
- pthread_kill(info->tid, sig);
- tobj = tobj->info.next;
- } while (tobj != mainthreadobj);
-
- return count-1;
+ return count;
}
#else
-static void cast_darwinstop()
+static void threads_cast_darwinstop(void)
{
threadobject *tobj = mainthreadobj;
- nativethread *infoself = THREADINFO;
+ threadobject *self = THREADOBJECT;
do {
- nativethread *info = &tobj->info;
- if (info != infoself)
+ if (tobj != self)
{
- thread_state_flavor_t flavor = PPC_THREAD_STATE;
- mach_msg_type_number_t thread_state_count = PPC_THREAD_STATE_COUNT;
+ thread_state_flavor_t flavor = MACHINE_THREAD_STATE;
+ mach_msg_type_number_t thread_state_count = MACHINE_THREAD_STATE_COUNT;
+#if defined(__I386__)
+ i386_thread_state_t thread_state;
+#else
ppc_thread_state_t thread_state;
- mach_port_t thread = info->mach_thread;
+#endif
+ mach_port_t thread = tobj->mach_thread;
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");
+
+ md_critical_section_restart((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->info.next;
+
+ tobj = tobj->next;
} while (tobj != mainthreadobj);
}
-static void cast_darwinresume()
+static void threads_cast_darwinresume(void)
{
threadobject *tobj = mainthreadobj;
- nativethread *infoself = THREADINFO;
+ threadobject *self = THREADOBJECT;
do {
- nativethread *info = &tobj->info;
- if (info != infoself)
+ if (tobj != self)
{
- mach_port_t thread = info->mach_thread;
+ mach_port_t thread = tobj->mach_thread;
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->info.next;
+
+ tobj = tobj->next;
} while (tobj != mainthreadobj);
}
#endif
#if defined(__MIPS__)
-static void cast_irixresume()
+static void threads_cast_irixresume(void)
{
pthread_mutex_lock(&suspend_ack_lock);
pthread_cond_broadcast(&suspend_cond);
pthread_mutex_unlock(&suspend_ack_lock);
}
#endif
-
-void cast_stopworld()
-{
- int count, i;
- lock_stopworld(2);
- pthread_mutex_lock(&threadlistlock);
-#if defined(__DARWIN__)
- cast_darwinstop();
-#else
- count = cast_sendsignals(GC_signum1(), 0);
- for (i=0; i<count; i++)
- threads_sem_wait(&suspend_ack);
-#endif
- pthread_mutex_unlock(&threadlistlock);
-}
-
-void cast_startworld()
-{
- pthread_mutex_lock(&threadlistlock);
-#if defined(__DARWIN__)
- cast_darwinresume();
-#elif defined(__MIPS__)
- cast_irixresume();
-#else
- cast_sendsignals(GC_signum2(), -1);
#endif
- pthread_mutex_unlock(&threadlistlock);
- unlock_stopworld();
-}
-#if !defined(__DARWIN__)
-static void sigsuspend_handler(ucontext_t *ctx)
+#if defined(ENABLE_GC_BOEHM) && !defined(__DARWIN__)
+static void threads_sigsuspend_handler(ucontext_t *_uc)
{
int sig;
sigset_t sigs;
/* XXX TWISTI: this is just a quick hack */
#if defined(ENABLE_JIT)
- thread_restartcriticalsection(ctx);
+ md_critical_section_restart(_uc);
#endif
/* Do as Boehm does. On IRIX a condition variable is used for wake-up
threads_sem_post(&suspend_ack);
pthread_cond_wait(&suspend_cond, &suspend_ack_lock);
pthread_mutex_unlock(&suspend_ack_lock);
+#elif defined(__CYGWIN__)
+ /* TODO */
+ assert(0);
#else
- threads_sem_post(&suspend_ack);
sig = GC_signum2();
sigfillset(&sigs);
sigsuspend(&sigs);
#endif
}
-
-int cacao_suspendhandler(ucontext_t *ctx)
-{
- if (stopworldwhere != 2)
- return 0;
-
- sigsuspend_handler(ctx);
- return 1;
-}
-#endif
-
-#if !defined(ENABLE_JVMTI)
-static void setthreadobject(threadobject *thread)
-#else
-void setthreadobject(threadobject *thread)
-#endif
-{
-#if !defined(HAVE___THREAD)
- pthread_setspecific(tkey_threadinfo, thread);
-#else
- threadobj = thread;
#endif
-}
+/* threads_stopworld ***********************************************************
-/* thread_setself **************************************************************
-
- Return the threadobject of the current thread.
-
- XXX The return value type should be changed to a typed pointer.
+ Stops the world from turning. All threads except the calling one
+ are suspended. The function returns as soon as all threads have
+ acknowledged their suspension.
*******************************************************************************/
-void *thread_getself(void)
+#if !defined(DISABLE_GC)
+void threads_stopworld(void)
{
- return THREADOBJECT;
-}
-
-/* unlocked dummy record - avoids NULL checks */
-static monitorLockRecord *dummyLR;
-
-static void initPools();
-
+#if !defined(__DARWIN__) && !defined(__CYGWIN__)
+ threadobject *t;
+ threadobject *self;
+ bool result;
+ s4 count, i;
+#endif
-/* thread_preinit **************************************************************
+ lock_stopworld(STOPWORLD_FROM_CLASS_NUMBERING);
- Do some early initialization of stuff required.
+ /* lock the threads lists */
-*******************************************************************************/
+ threads_list_lock();
-void threads_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);
+#if defined(__DARWIN__)
+ threads_cast_darwinstop();
+#elif defined(__CYGWIN__)
+ /* TODO */
+ assert(0);
#else
- pthread_mutex_init_rec(&compiler_mutex);
-#endif
+ self = THREADOBJECT;
- pthread_mutex_init(&threadlistlock, NULL);
- pthread_mutex_init(&stopworldlock, NULL);
+ count = 0;
- /* Allocate something so the garbage collector's signal handlers
- are installed. */
- heap_allocate(1, false, NULL);
+ /* suspend all running threads */
+ for (t = threads_list_first(); t != NULL; t = threads_list_next(t)) {
+ /* don't send the signal to ourself */
- mainthreadobj = NEW(threadobject);
- mainthreadobj->info.tid = pthread_self();
-#if !defined(HAVE___THREAD)
- pthread_key_create(&tkey_threadinfo, NULL);
-#endif
- setthreadobject(mainthreadobj);
- initPools();
+ if (t == self)
+ continue;
- /* Every newly created object's monitorPtr points here so we save
- a check against NULL */
+ /* don't send the signal to NEW threads (because they are not
+ completely initialized) */
- dummyLR = NEW(monitorLockRecord);
- dummyLR->o = NULL;
- dummyLR->ownerThread = NULL;
- dummyLR->waiting = NULL;
- dummyLR->incharge = dummyLR;
+ if (t->state == THREAD_STATE_NEW)
+ continue;
- /* we need a working dummyLR before initializing the critical
- section tree */
+ /* send the signal */
- criticaltree = avl_create(&criticalcompare);
+ result = threads_suspend_thread(t, SUSPEND_REASON_STOPWORLD);
+ assert(result);
- thread_addstaticcritical();
- threads_sem_init(&suspend_ack, 0, 0);
-}
+ /* increase threads count */
+ count++;
+ }
-static pthread_attr_t threadattr;
+ /* wait for all threads signaled to suspend */
+ for (i = 0; i < count; i++)
+ threads_sem_wait(&suspend_ack);
+#endif
-static void freeLockRecordPools(lockRecordPool *);
+ /* ATTENTION: Don't unlock the threads-lists here so that
+ non-signaled NEW threads can't change their state and execute
+ code. */
+}
+#endif /* !defined(DISABLE_GC) */
-/* threads_init ****************************************************************
+/* threads_startworld **********************************************************
- Initializes the threads required by the JVM: main, finalizer.
+ Starts the world again after it has previously been stopped.
*******************************************************************************/
-bool threads_init(u1 *stackbottom)
+#if !defined(DISABLE_GC)
+void threads_startworld(void)
{
- java_lang_String *threadname;
- java_lang_Thread *mainthread;
- java_lang_ThreadGroup *threadgroup;
- threadobject *tempthread;
- methodinfo *method;
+#if !defined(__DARWIN__) && !defined(__CYGWIN__)
+ threadobject *t;
+ threadobject *self;
+ bool result;
+ s4 count, i;
+#endif
+
+#if defined(__DARWIN__)
+ threads_cast_darwinresume();
+#elif defined(__MIPS__)
+ threads_cast_irixresume();
+#elif defined(__CYGWIN__)
+ /* TODO */
+ assert(0);
+#else
+ self = THREADOBJECT;
- tempthread = mainthreadobj;
+ count = 0;
- freeLockRecordPools(mainthreadobj->ee.lrpool);
+ /* resume all thread we haltet */
+ for (t = threads_list_first(); t != NULL; t = threads_list_next(t)) {
+ /* don't send the signal to ourself */
- /* 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 (t == self)
+ continue;
- class_java_lang_VMThread->instancesize = sizeof(threadobject);
+ /* don't send the signal to NEW threads (because they are not
+ completely initialized) */
- /* create a VMThread */
+ if (t->state == THREAD_STATE_NEW)
+ continue;
- mainthreadobj = (threadobject *) builtin_new(class_java_lang_VMThread);
+ /* send the signal */
- if (!mainthreadobj)
- return false;
+ result = threads_resume_thread(t);
+ assert(result);
- FREE(tempthread, threadobject);
+ /* increase threads count */
- initThread(&mainthreadobj->o);
+ count++;
+ }
- setthreadobject(mainthreadobj);
+ /* wait for all threads signaled to suspend */
+ for (i = 0; i < count; i++)
+ threads_sem_wait(&suspend_ack);
- initLocks();
+#endif
- mainthreadobj->info.next = mainthreadobj;
- mainthreadobj->info.prev = mainthreadobj;
+ /* unlock the threads lists */
-#if defined(ENABLE_INTRP)
- /* create interpreter stack */
+ threads_list_unlock();
- if (opt_intrp) {
- MSET(intrp_main_stack, 0, u1, opt_stacksize);
- mainthreadobj->info._global_sp = intrp_main_stack + opt_stacksize;
- }
+ unlock_stopworld();
+}
#endif
- threadname = javastring_new(utf_new_char("main"));
- /* allocate and init ThreadGroup */
+/* threads_set_current_threadobject ********************************************
- threadgroup = (java_lang_ThreadGroup *)
- native_new_and_init(class_java_lang_ThreadGroup);
+ Set the current thread object.
+
+ IN:
+ thread.......the thread object to set
+
+*******************************************************************************/
+
+void threads_set_current_threadobject(threadobject *thread)
+{
+#if !defined(HAVE___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_impl_thread_new *****************************************************
+
+ Initialize implementation fields of a threadobject.
+
+ IN:
+ t....the threadobject
+
+*******************************************************************************/
+
+void threads_impl_thread_new(threadobject *t)
+{
+ /* get the pthread id */
+
+ t->tid = pthread_self();
+
+ /* initialize the mutex and the condition */
+
+ pthread_mutex_init(&(t->waitmutex), NULL);
+ pthread_cond_init(&(t->waitcond), NULL);
+ pthread_mutex_init(&(t->suspendmutex), NULL);
+ pthread_cond_init(&(t->suspendcond), NULL);
+
+#if defined(ENABLE_DEBUG_FILTER)
+ /* Initialize filter counters */
+ t->filterverbosecallctr[0] = 0;
+ t->filterverbosecallctr[1] = 0;
+#endif
+
+#if !defined(NDEBUG)
+ t->tracejavacallindent = 0;
+ t->tracejavacallcount = 0;
+#endif
+}
+
+
+/* threads_impl_thread_free ****************************************************
+
+ Cleanup thread stuff.
+
+ IN:
+ t....the threadobject
+
+*******************************************************************************/
+
+void threads_impl_thread_free(threadobject *t)
+{
+ /* destroy the mutex and the condition */
+
+ if (pthread_mutex_destroy(&(t->waitmutex)) != 0)
+ vm_abort("threads_impl_thread_free: pthread_mutex_destroy failed: %s",
+ strerror(errno));
+
+ if (pthread_cond_destroy(&(t->waitcond)) != 0)
+ vm_abort("threads_impl_thread_free: pthread_cond_destroy failed: %s",
+ strerror(errno));
+
+ if (pthread_mutex_destroy(&(t->suspendmutex)) != 0)
+ vm_abort("threads_impl_thread_free: pthread_mutex_destroy failed: %s",
+ strerror(errno));
+
+ if (pthread_cond_destroy(&(t->suspendcond)) != 0)
+ vm_abort("threads_impl_thread_free: pthread_cond_destroy failed: %s",
+ strerror(errno));
+}
- if (!threadgroup)
- throw_exception_exit();
- /* create a Thread */
+/* threads_get_current_threadobject ********************************************
- mainthread = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
+ Return the threadobject of the current thread.
+
+ RETURN VALUE:
+ the current threadobject *
+
+*******************************************************************************/
+
+threadobject *threads_get_current_threadobject(void)
+{
+ return THREADOBJECT;
+}
+
+
+/* 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_impl_preinit(void)
+{
+ pthread_mutex_init(&stopworldlock, NULL);
+
+ /* initialize exit mutex and condition (on exit we join all
+ threads) */
+
+ pthread_mutex_init(&mutex_join, NULL);
+ pthread_cond_init(&cond_join, NULL);
- if (!mainthread)
- throw_exception_exit();
+ /* initialize the threads-list mutex */
- mainthreadobj->o.thread = mainthread;
+ pthread_mutex_init(&mutex_threads_list, NULL);
- /* call Thread.<init>(Ljava/lang/VMThread;Ljava/lang/String;IZ)V */
+#if !defined(HAVE___THREAD)
+ pthread_key_create(&threads_current_threadobject_key, NULL);
+#endif
+
+ threads_sem_init(&suspend_ack, 0, 0);
+}
+
+
+/* threads_list_lock ***********************************************************
+
+ Enter the threads table mutex.
+
+ NOTE: We need this function as we can't use an internal lock for
+ the threads lists because the thread's lock is initialized in
+ threads_table_add (when we have the thread index), but we
+ already need the lock at the entry of the function.
+
+*******************************************************************************/
+
+void threads_list_lock(void)
+{
+ if (pthread_mutex_lock(&mutex_threads_list) != 0)
+ vm_abort("threads_list_lock: pthread_mutex_lock failed: %s",
+ strerror(errno));
+}
+
+
+/* threads_list_unlock *********************************************************
+
+ Leave the threads list mutex.
+
+*******************************************************************************/
+
+void threads_list_unlock(void)
+{
+ if (pthread_mutex_unlock(&mutex_threads_list) != 0)
+ vm_abort("threads_list_unlock: pthread_mutex_unlock failed: %s",
+ strerror(errno));
+}
- method = 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)
+/* threads_mutex_join_lock *****************************************************
+
+ Enter the join mutex.
+
+*******************************************************************************/
+
+void threads_mutex_join_lock(void)
+{
+ if (pthread_mutex_lock(&mutex_join) != 0)
+ vm_abort("threads_mutex_join_lock: pthread_mutex_lock failed: %s",
+ strerror(errno));
+}
+
+
+/* threads_mutex_join_unlock ***************************************************
+
+ Leave the join mutex.
+
+*******************************************************************************/
+
+void threads_mutex_join_unlock(void)
+{
+ if (pthread_mutex_unlock(&mutex_join) != 0)
+ vm_abort("threads_mutex_join_unlock: pthread_mutex_unlock failed: %s",
+ strerror(errno));
+}
+
+
+/* threads_init ****************************************************************
+
+ Initializes the threads required by the JVM: main, finalizer.
+
+*******************************************************************************/
+
+bool threads_init(void)
+{
+ threadobject *mainthread;
+ java_handle_t *threadname;
+ java_lang_Thread *t;
+ java_handle_t *o;
+
+#if defined(ENABLE_JAVASE)
+ java_lang_ThreadGroup *threadgroup;
+ methodinfo *m;
+#endif
+
+#if defined(WITH_CLASSPATH_GNU)
+ java_lang_VMThread *vmt;
+#endif
+
+ pthread_attr_t attr;
+
+ /* 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);
+#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_thread_init == NULL)
return false;
- (void) vm_call_method(method, (java_objectheader *) mainthread,
- mainthreadobj, threadname, 5, false);
+ /* Get the main-thread (NOTE: The main threads is always the first
+ thread in the list). */
+
+ mainthread = threads_list_first();
+
+#if defined(ENABLE_GC_CACAO)
+ /* register reference to java.lang.Thread with the GC */
+
+ gc_reference_register((java_objectheader **) &(mainthread->object));
+#endif
+
+ /* create a java.lang.Thread for the main thread */
+
+ t = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
- if (*exceptionptr)
+ if (t == NULL)
return false;
- mainthread->group = threadgroup;
+ /* set the object in the internal data structure */
- /* add mainthread to ThreadGroup */
+ mainthread->object = t;
- method = class_resolveclassmethod(class_java_lang_ThreadGroup,
- utf_new_char("addThread"),
- utf_new_char("(Ljava/lang/Thread;)V"),
- class_java_lang_ThreadGroup,
- true);
+#if defined(ENABLE_INTRP)
+ /* create interpreter stack */
- if (!method)
+ if (opt_intrp) {
+ MSET(intrp_main_stack, 0, u1, opt_stacksize);
+ mainthread->_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 == NULL)
return false;
+#endif
+
+#if defined(WITH_CLASSPATH_GNU)
+ /* create a java.lang.VMThread for the main thread */
- (void) vm_call_method(method, (java_objectheader *) threadgroup,
- mainthread);
+ vmt = (java_lang_VMThread *) builtin_new(class_java_lang_VMThread);
- if (*exceptionptr)
+ if (vmt == NULL)
return false;
- threads_set_thread_priority(pthread_self(), 5);
+ /* set the thread */
- pthread_attr_init(&threadattr);
- pthread_attr_setdetachstate(&threadattr, PTHREAD_CREATE_DETACHED);
+ LLNI_field_set_ref(vmt, thread, t);
+ LLNI_field_set_val(vmt, vmdata, (java_lang_Object *) mainthread);
- /* everything's ok */
+ /* call java.lang.Thread.<init>(Ljava/lang/VMThread;Ljava/lang/String;IZ)V */
+ o = (java_handle_t *) t;
- return true;
-}
+ (void) vm_call_method(method_thread_init, o, vmt, threadname, NORM_PRIORITY,
+ false);
+#elif defined(WITH_CLASSPATH_SUN)
-void initThread(java_lang_VMThread *t)
-{
- threadobject *thread = (threadobject*) t;
- nativethread *info = &thread->info;
- info->tid = pthread_self();
- /* TODO destroy all those things */
- pthread_mutex_init(&info->joinMutex, NULL);
- pthread_cond_init(&info->joinCond, NULL);
-
- pthread_mutex_init(&thread->waitLock, NULL);
- pthread_cond_init(&thread->waitCond, NULL);
- thread->interrupted = false;
- thread->signaled = false;
- thread->isSleeping = false;
-}
+ /* We trick java.lang.Thread.init, which sets the priority of the
+ current thread to the parent's one. */
-static void initThreadLocks(threadobject *);
+ t->priority = NORM_PRIORITY;
+#elif defined(WITH_CLASSPATH_CLDC1_1)
-/* startupinfo *****************************************************************
+ /* set the thread */
- Struct used to pass info from threads_start_thread to
- threads_startup_thread.
+ t->vm_thread = (java_lang_Object *) mainthread;
-******************************************************************************/
+ /* call public Thread(String name) */
-typedef struct {
- threadobject *thread; /* threadobject for this thread */
- functionptr function; /* function to run in the new thread */
- sem_t *psem; /* signals when thread has been entered */
- /* in the thread list */
- sem_t *psem_first; /* signals when pthread_create has returned */
-} startupinfo;
+ o = (java_handle_t *) t;
+
+ (void) vm_call_method(method_thread_init, o, threadname);
+#else
+# error unknown classpath configuration
+#endif
+
+ if (exceptions_get_exception())
+ return false;
+
+#if defined(ENABLE_JAVASE)
+ LLNI_field_set_ref(t, group, threadgroup);
+
+# if defined(WITH_CLASSPATH_GNU)
+ /* add main thread to java.lang.ThreadGroup */
+
+ m = class_resolveclassmethod(class_java_lang_ThreadGroup,
+ utf_addThread,
+ utf_java_lang_Thread__V,
+ class_java_lang_ThreadGroup,
+ true);
+
+ o = (java_handle_t *) threadgroup;
+
+ (void) vm_call_method(m, o, t);
+
+ if (exceptions_get_exception())
+ return false;
+# else
+# warning Do not know what to do here
+# endif
+#endif
+
+ threads_set_thread_priority(pthread_self(), NORM_PRIORITY);
+
+ /* initialize the thread attribute object */
+
+ if (pthread_attr_init(&attr) != 0)
+ vm_abort("threads_init: pthread_attr_init failed: %s", strerror(errno));
+
+ if (pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) != 0)
+ vm_abort("threads_init: pthread_attr_setdetachstate failed: %s",
+ strerror(errno));
+
+#if !defined(NDEBUG)
+ if (opt_verbosethreads) {
+ printf("[Starting thread ");
+ threads_thread_print_info(mainthread);
+ printf("]\n");
+ }
+#endif
+
+ /* everything's ok */
+
+ return true;
+}
/* threads_startup_thread ******************************************************
Thread startup function called by pthread_create.
+ Thread which have a startup.function != NULL are marked as internal
+ threads. All other threads are threated as normal Java threads.
+
NOTE: This function is not called directly by pthread_create. The Boehm GC
inserts its own GC_start_routine in between, which then calls
threads_startup.
IN:
- t............the argument passed to pthread_create, ie. a pointer to
+ arg..........the argument passed to pthread_create, ie. a pointer to
a startupinfo struct. CAUTION: When the `psem` semaphore
is posted, the startupinfo struct becomes invalid! (It
is allocated on the stack of threads_start_thread.)
******************************************************************************/
-static void *threads_startup_thread(void *t)
+static void *threads_startup_thread(void *arg)
{
- startupinfo *startup;
- threadobject *thread;
- sem_t *psem;
- nativethread *info;
- threadobject *tnext;
- methodinfo *method;
- functionptr function;
+ startupinfo *startup;
+ threadobject *thread;
+#if defined(WITH_CLASSPATH_GNU)
+ java_lang_VMThread *vmt;
+#endif
+ sem_t *psem;
+ classinfo *c;
+ methodinfo *m;
+ java_handle_t *o;
+ functionptr function;
#if defined(ENABLE_INTRP)
u1 *intrp_thread_stack;
/* create interpreter stack */
if (opt_intrp) {
- intrp_thread_stack = (u1 *) alloca(opt_stacksize);
+ intrp_thread_stack = GCMNEW(u1, opt_stacksize);
MSET(intrp_thread_stack, 0, u1, opt_stacksize);
- } else {
- intrp_thread_stack = NULL;
}
+ else
+ intrp_thread_stack = NULL;
#endif
/* get passed startupinfo structure and the values in there */
- startup = t;
- t = NULL; /* make sure it's not used wrongly */
+ startup = arg;
thread = startup->thread;
function = startup->function;
psem = startup->psem;
- info = &thread->info;
+ /* Seems like we've encountered a situation where thread->tid was
+ not set by pthread_create. We alleviate this problem by waiting
+ for pthread_create to return. */
- /* Seems like we've encountered a situation where info->tid was not set by
- * pthread_create. We alleviate this problem by waiting for pthread_create
- * to return. */
threads_sem_wait(startup->psem_first);
- /* set the thread object */
-
#if defined(__DARWIN__)
- info->mach_thread = mach_thread_self();
+ thread->mach_thread = mach_thread_self();
#endif
- setthreadobject(thread);
- /* insert the thread into the threadlist */
+ /* store the internal thread data-structure in the TSD */
- pthread_mutex_lock(&threadlistlock);
+ threads_set_current_threadobject(thread);
- info->prev = mainthreadobj;
- info->next = tnext = mainthreadobj->info.next;
- mainthreadobj->info.next = thread;
- tnext->info.prev = thread;
+ /* set our priority */
- pthread_mutex_unlock(&threadlistlock);
+ threads_set_thread_priority(thread->tid, LLNI_field_direct(thread->object, priority));
- /* init data structures of this thread */
+ /* thread is completely initialized */
- initThreadLocks(thread);
+ threads_thread_state_runnable(thread);
/* tell threads_startup_thread that we registered ourselves */
/* CAUTION: *startup becomes invalid with this! */
startup = NULL;
threads_sem_post(psem);
- /* set our priority */
-
- threads_set_thread_priority(info->tid, thread->o.thread->priority);
-
#if defined(ENABLE_INTRP)
/* set interpreter stack */
if (opt_intrp)
- THREADINFO->_global_sp = (void *) (intrp_thread_stack + opt_stacksize);
+ thread->_global_sp = (Cell *) (intrp_thread_stack + opt_stacksize);
+#endif
+
+#if defined(ENABLE_JVMTI)
+ /* fire thread start event */
+
+ if (jvmti)
+ jvmti_ThreadStartEnd(JVMTI_EVENT_THREAD_START);
+#endif
+
+#if !defined(NDEBUG)
+ if (opt_verbosethreads) {
+ printf("[Starting thread ");
+ threads_thread_print_info(thread);
+ printf("]\n");
+ }
#endif
/* find and run the Thread.run()V method if no other function was passed */
if (function == NULL) {
- 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_SUN) || defined(WITH_CLASSPATH_CLDC1_1)
+ c = thread->object->header.vftbl->class;
+#else
+# error unknown classpath configuration
+#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 */
- if (!method)
- throw_exception();
+ _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 */
+
+ vmt = (java_lang_VMThread *) LLNI_field_direct(thread->object, vmThread);
+ o = (java_handle_t *) vmt;
+
+#elif defined(WITH_CLASSPATH_SUN) || defined(WITH_CLASSPATH_CLDC1_1)
+ o = (java_handle_t *) thread->object;
+#else
+# error unknown classpath configuration
+#endif
- (void) vm_call_method(method, (java_objectheader *) thread);
+ /* run the thread */
+ (void) vm_call_method(m, o);
}
else {
+ /* 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;
+
/* call passed function, e.g. finalizer_thread */
(function)();
}
- /* Allow lock record pools to be used by other threads. They
- cannot be deleted so we'd better not waste them. */
+#if !defined(NDEBUG)
+ if (opt_verbosethreads) {
+ printf("[Stopping thread ");
+ threads_thread_print_info(thread);
+ printf("]\n");
+ }
+#endif
- freeLockRecordPools(thread->ee.lrpool);
+#if defined(ENABLE_JVMTI)
+ /* fire thread end event */
- /* remove thread from thread list, do this inside a lock */
+ if (jvmti)
+ jvmti_ThreadStartEnd(JVMTI_EVENT_THREAD_END);
+#endif
- pthread_mutex_lock(&threadlistlock);
- info->next->info.prev = info->prev;
- info->prev->info.next = info->next;
- pthread_mutex_unlock(&threadlistlock);
+ if (!threads_detach_thread(thread))
+ vm_abort("threads_startup_thread: threads_detach_thread failed");
- /* reset thread id (lock on joinMutex? TWISTI) */
+ /* set ThreadMXBean variables */
- pthread_mutex_lock(&info->joinMutex);
- info->tid = 0;
- pthread_mutex_unlock(&info->joinMutex);
+ _Jv_jvm->java_lang_management_ThreadMXBean_ThreadCount--;
- /* tell everyone that a thread has finished */
+ return NULL;
+}
- pthread_cond_broadcast(&info->joinCond);
- return NULL;
+/* threads_impl_thread_start ***************************************************
+
+ Start a thread in the JVM. Both (vm internal and java) thread
+ objects exist.
+
+ IN:
+ thread....the thread object
+ f.........function to run in the new thread. NULL means that the
+ "run" method of the object `t` should be called
+
+******************************************************************************/
+
+void threads_impl_thread_start(threadobject *thread, functionptr f)
+{
+ sem_t sem;
+ sem_t sem_first;
+ pthread_attr_t attr;
+ startupinfo startup;
+ int ret;
+
+ /* fill startupinfo structure passed by pthread_create to
+ * threads_startup_thread */
+
+ startup.thread = thread;
+ startup.function = f; /* maybe we don't call Thread.run()V */
+ startup.psem = &sem;
+ startup.psem_first = &sem_first;
+
+ threads_sem_init(&sem, 0, 0);
+ threads_sem_init(&sem_first, 0, 0);
+
+ /* initialize thread attributes */
+
+ if (pthread_attr_init(&attr) != 0)
+ vm_abort("threads_impl_thread_start: pthread_attr_init failed: %s",
+ strerror(errno));
+
+ if (pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) != 0)
+ vm_abort("threads_impl_thread_start: pthread_attr_setdetachstate failed: %s",
+ strerror(errno));
+
+ /* initialize thread stacksize */
+
+ if (pthread_attr_setstacksize(&attr, opt_stacksize))
+ vm_abort("threads_impl_thread_start: pthread_attr_setstacksize failed: %s",
+ strerror(errno));
+
+ /* create the thread */
+
+ ret = pthread_create(&(thread->tid), &attr, threads_startup_thread, &startup);
+
+ /* destroy the thread attributes */
+
+ if (pthread_attr_destroy(&attr) != 0)
+ vm_abort("threads_impl_thread_start: pthread_attr_destroy failed: %s",
+ strerror(errno));
+
+ /* check for pthread_create error */
+
+ if (ret != 0)
+ vm_abort("threads_impl_thread_start: pthread_create failed: %s",
+ strerror(errno));
+
+ /* signal that pthread_create has returned, so thread->tid is valid */
+
+ threads_sem_post(&sem_first);
+
+ /* wait here until the thread has entered itself into the thread list */
+
+ threads_sem_wait(&sem);
+
+ /* cleanup */
+
+ sem_destroy(&sem);
+ sem_destroy(&sem_first);
}
-/* threads_start_thread ********************************************************
+/* threads_set_thread_priority *************************************************
- Start a thread in the JVM.
+ Set the priority of the given thread.
IN:
- t............the java.lang.Thread object
- function.....function to run in the new thread. NULL means that the
- "run" method of the object `t` should be called
+ 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;
+ utf *u;
+ java_handle_t *s;
+ java_handle_t *o;
+ java_lang_Thread *t;
+
+#if defined(ENABLE_JAVASE)
+ java_lang_ThreadGroup *group;
+ threadobject *mainthread;
+ classinfo *c;
+ methodinfo *m;
+#endif
+
+#if defined(WITH_CLASSPATH_GNU)
+ java_lang_VMThread *vmt;
+#endif
+
+ /* Enter the join-mutex, so if the main-thread is currently
+ waiting to join all threads, the number of non-daemon threads
+ is correct. */
+
+ threads_mutex_join_lock();
+
+ /* create internal thread data-structure */
+
+ thread = threads_thread_new();
+
+ /* thread is a Java thread and running */
+
+ thread->flags = THREAD_FLAG_JAVA;
+
+ if (isdaemon)
+ thread->flags |= THREAD_FLAG_DAEMON;
+
+ /* The thread is flagged and (non-)daemon thread, we can leave the
+ mutex. */
+
+ threads_mutex_join_unlock();
+
+ /* create a java.lang.Thread object */
+
+ t = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
+
+ /* XXX memory leak!!! */
+ if (t == NULL)
+ return false;
+
+ thread->object = t;
+
+ /* thread is completely initialized */
+
+ threads_thread_state_runnable(thread);
+
+#if !defined(NDEBUG)
+ if (opt_verbosethreads) {
+ printf("[Attaching thread ");
+ threads_thread_print_info(thread);
+ printf("]\n");
+ }
+#endif
+
+#if defined(ENABLE_INTRP)
+ /* create interpreter stack */
+
+ if (opt_intrp) {
+ MSET(intrp_main_stack, 0, u1, opt_stacksize);
+ thread->_global_sp = (Cell *) (intrp_main_stack + opt_stacksize);
+ }
+#endif
+
+#if defined(WITH_CLASSPATH_GNU)
+
+ /* create a java.lang.VMThread object */
+
+ vmt = (java_lang_VMThread *) builtin_new(class_java_lang_VMThread);
+
+ /* XXX memory leak!!! */
+ if (vmt == NULL)
+ return false;
+
+ /* set the thread */
+
+ LLNI_field_set_ref(vmt, thread, t);
+ LLNI_field_set_val(vmt, vmdata, (java_lang_Object *) thread);
+
+#elif defined(WITH_CLASSPATH_SUN)
+
+ vm_abort("threads_attach_current_thread: IMPLEMENT ME!");
+
+#elif defined(WITH_CLASSPATH_CLDC1_1)
+
+ LLNI_field_set_val(t, vm_thread, (java_lang_Object *) thread);
+
+#else
+# error unknown classpath configuration
+#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;
+#if defined(ENABLE_JAVASE)
+ /* get the main thread */
+
+ mainthread = threads_list_first();
+ group = LLNI_field_direct(mainthread->object, group);
+#endif
+ }
+
+ /* the the thread name */
-******************************************************************************/
+ s = javastring_new(u);
-void threads_start_thread(thread *t, functionptr function)
-{
- nativethread *info;
- sem_t sem;
- sem_t sem_first;
- startupinfo startup;
+ /* for convenience */
- info = &((threadobject *) t->vmThread)->info;
+ o = (java_handle_t *) thread->object;
- /* fill startupinfo structure passed by pthread_create to
- * threads_startup_thread */
+#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
- startup.thread = (threadobject*) t->vmThread;
- startup.function = function; /* maybe we don't call Thread.run()V */
- startup.psem = &sem;
- startup.psem_first = &sem_first;
+ if (exceptions_get_exception())
+ return false;
- threads_sem_init(&sem, 0, 0);
- threads_sem_init(&sem_first, 0, 0);
+#if defined(ENABLE_JAVASE)
+ /* store the thread group in the object */
- /* create the thread */
+ LLNI_field_direct(thread->object, group) = group;
- if (pthread_create(&info->tid, &threadattr, threads_startup_thread,
- &startup)) {
- log_text("pthread_create failed");
- assert(0);
- }
+ /* add thread to given thread-group */
- /* signal that pthread_create has returned, so info->tid is valid */
+ LLNI_class_get(group, c);
- threads_sem_post(&sem_first);
+ m = class_resolveclassmethod(c,
+ utf_addThread,
+ utf_java_lang_Thread__V,
+ class_java_lang_ThreadGroup,
+ true);
- /* wait here until the thread has entered itself into the thread list */
+ o = (java_handle_t *) group;
- threads_sem_wait(&sem);
+ (void) vm_call_method(m, o, t);
- /* cleanup */
+ if (exceptions_get_exception())
+ return false;
+#endif
- sem_destroy(&sem);
- sem_destroy(&sem_first);
+ return true;
}
-/* At the end of the program, we wait for all running non-daemon threads to die
- */
+/* threads_detach_thread *******************************************************
-static threadobject *findNonDaemon(threadobject *thread)
-{
- while (thread != mainthreadobj) {
- if (!thread->o.thread->daemon)
- return thread;
- thread = thread->info.prev;
- }
+ Detaches the passed thread from the VM. Used in JNI.
- return NULL;
-}
+*******************************************************************************/
-void joinAllThreads()
+bool threads_detach_thread(threadobject *thread)
{
- threadobject *thread;
- pthread_mutex_lock(&threadlistlock);
- while ((thread = findNonDaemon(mainthreadobj->info.prev)) != NULL) {
- nativethread *info = &thread->info;
- pthread_mutex_lock(&info->joinMutex);
- pthread_mutex_unlock(&threadlistlock);
- while (info->tid)
- pthread_cond_wait(&info->joinCond, &info->joinMutex);
- pthread_mutex_unlock(&info->joinMutex);
- pthread_mutex_lock(&threadlistlock);
- }
- pthread_mutex_unlock(&threadlistlock);
-}
+#if defined(ENABLE_JAVASE)
+ java_lang_ThreadGroup *group;
+ classinfo *c;
+ methodinfo *m;
+ java_handle_t *o;
+ java_lang_Thread *t;
+#endif
-static void initLockRecord(monitorLockRecord *r, threadobject *t)
-{
- r->lockCount = 1;
- r->ownerThread = t;
- r->queuers = 0;
- r->o = NULL;
- r->waiter = NULL;
- r->incharge = (monitorLockRecord *) &dummyLR;
- r->waiting = NULL;
- threads_sem_init(&r->queueSem, 0, 0);
- pthread_mutex_init(&r->resolveLock, NULL);
- pthread_cond_init(&r->resolveWait, NULL);
-}
+ /* XXX implement uncaught exception stuff (like JamVM does) */
-void initLocks()
-{
- initThreadLocks(mainthreadobj);
-}
+#if defined(ENABLE_JAVASE)
+ /* remove thread from the thread group */
-static void initThreadLocks(threadobject *thread)
-{
- thread->ee.firstLR = NULL;
- thread->ee.lrpool = NULL;
- thread->ee.numlr = 0;
-}
+ group = LLNI_field_direct(thread->object, group);
-static lockRecordPool *allocNewLockRecordPool(threadobject *thread, int size)
-{
- lockRecordPool *p = mem_alloc(sizeof(lockRecordPoolHeader) + sizeof(monitorLockRecord) * size);
- int i;
+ /* XXX TWISTI: should all threads be in a ThreadGroup? */
- p->header.size = size;
- for (i=0; i<size; i++) {
- initLockRecord(&p->lr[i], thread);
- p->lr[i].nextFree = &p->lr[i+1];
- }
- p->lr[i-1].nextFree = NULL;
- return p;
-}
+ if (group != NULL) {
+ LLNI_class_get(group, c);
-#define INITIALLOCKRECORDS 8
+# if defined(WITH_CLASSPATH_GNU)
+ m = class_resolveclassmethod(c,
+ utf_removeThread,
+ utf_java_lang_Thread__V,
+ class_java_lang_ThreadGroup,
+ true);
+# elif defined(WITH_CLASSPATH_SUN)
+ m = class_resolveclassmethod(c,
+ utf_remove,
+ utf_java_lang_Thread__V,
+ class_java_lang_ThreadGroup,
+ true);
+# else
+# error unknown classpath configuration
+# endif
-pthread_mutex_t pool_lock;
-lockRecordPool *global_pool;
+ if (m == NULL)
+ return false;
-static void initPools()
-{
- pthread_mutex_init(&pool_lock, NULL);
-}
+ o = (java_handle_t *) group;
+ t = thread->object;
-static lockRecordPool *allocLockRecordPool(threadobject *t, int size)
-{
- pthread_mutex_lock(&pool_lock);
- if (global_pool) {
- int i;
- lockRecordPool *pool = global_pool;
- global_pool = pool->header.next;
- pthread_mutex_unlock(&pool_lock);
-
- for (i=0; i < pool->header.size; i++) {
- pool->lr[i].ownerThread = t;
- pool->lr[i].nextFree = &pool->lr[i+1];
- }
- pool->lr[i-1].nextFree = NULL;
+ (void) vm_call_method(m, o, t);
- return pool;
+ if (exceptions_get_exception())
+ return false;
}
- pthread_mutex_unlock(&pool_lock);
+#endif
- return allocNewLockRecordPool(t, size);
-}
+ /* thread is terminated */
-static void freeLockRecordPools(lockRecordPool *pool)
-{
- lockRecordPoolHeader *last;
- pthread_mutex_lock(&pool_lock);
- last = &pool->header;
- while (last->next)
- last = &last->next->header;
- last->next = global_pool;
- global_pool = pool;
- pthread_mutex_unlock(&pool_lock);
-}
+ threads_thread_state_terminated(thread);
-static monitorLockRecord *allocLockRecordSimple(threadobject *t)
-{
- monitorLockRecord *r;
-
- assert(t);
- r = t->ee.firstLR;
-
- if (!r) {
- int poolsize = t->ee.numlr ? t->ee.numlr * 2 : INITIALLOCKRECORDS;
- lockRecordPool *pool = allocLockRecordPool(t, poolsize);
- pool->header.next = t->ee.lrpool;
- t->ee.lrpool = pool;
- r = &pool->lr[0];
- t->ee.numlr += pool->header.size;
+#if !defined(NDEBUG)
+ if (opt_verbosethreads) {
+ printf("[Detaching thread ");
+ threads_thread_print_info(thread);
+ printf("]\n");
}
-
- t->ee.firstLR = r->nextFree;
-#ifndef NDEBUG
- r->nextFree = NULL; /* in order to find invalid uses of nextFree */
#endif
- return r;
-}
-static inline void recycleLockRecord(threadobject *t, monitorLockRecord *r)
-{
- assert(t);
- assert(r);
- assert(r->ownerThread == t);
- assert(r->nextFree == NULL);
+ /* Enter the join-mutex before calling threads_thread_free, so
+ threads_join_all_threads gets the correct number of non-daemon
+ threads. */
- r->nextFree = t->ee.firstLR;
- t->ee.firstLR = r;
-}
+ threads_mutex_join_lock();
-/* initObjectLock **************************************************************
+ /* free the vm internal thread object */
- Initialize the monitor pointer of the given object. The monitor gets
- initialized to an unlocked state.
+ threads_thread_free(thread);
-*******************************************************************************/
+ /* Signal that this thread has finished and leave the mutex. */
-void initObjectLock(java_objectheader *o)
-{
- assert(o);
+ pthread_cond_signal(&cond_join);
+ threads_mutex_join_unlock();
- o->monitorPtr = dummyLR;
+ return true;
}
-/* get_dummyLR *****************************************************************
-
- Returns the global dummy monitor lock record. The pointer is
- required in the code generator to set up a virtual
- java_objectheader for code patch locking.
+/* threads_suspend_thread ******************************************************
-*******************************************************************************/
+ Suspend the passed thread. Execution stops until the thread
+ is explicitly resumend again.
-monitorLockRecord *get_dummyLR(void)
-{
- return dummyLR;
-}
+ IN:
+ reason.....Reason for suspending this thread.
+*******************************************************************************/
-static void queueOnLockRecord(monitorLockRecord *lr, java_objectheader *o)
+bool threads_suspend_thread(threadobject *thread, s4 reason)
{
- atomic_add(&lr->queuers, 1);
- MEMORY_BARRIER_AFTER_ATOMIC();
+ /* acquire the suspendmutex */
+ if (pthread_mutex_lock(&(thread->suspendmutex)) != 0)
+ vm_abort("threads_suspend_thread: pthread_mutex_lock failed: %s",
+ strerror(errno));
- if (lr->o == o)
- threads_sem_wait(&lr->queueSem);
+ if (thread->suspended) {
+ pthread_mutex_unlock(&(thread->suspendmutex));
+ return false;
+ }
- atomic_add(&lr->queuers, -1);
-}
+ /* set the reason for the suspension */
+ thread->suspend_reason = reason;
-static void freeLockRecord(monitorLockRecord *lr)
-{
- int q;
- lr->o = NULL;
- MEMORY_BARRIER();
- q = lr->queuers;
- while (q--)
- threads_sem_post(&lr->queueSem);
-}
+ /* send the suspend signal to the thread */
+ assert(thread != THREADOBJECT);
+ if (pthread_kill(thread->tid, SIGUSR1) != 0)
+ vm_abort("threads_suspend_thread: pthread_kill failed: %s",
+ strerror(errno));
-static inline void handleWaiter(monitorLockRecord *newlr,
- monitorLockRecord *curlr,
- java_objectheader *o)
-{
- /* if the current lock record is used for waiting on the object */
- /* `o`, then record it as a waiter in the new lock record */
+ /* REMEMBER: do not release the suspendmutex, this is done
+ by the thread itself in threads_suspend_ack(). */
- if (curlr->waiting == o)
- newlr->waiter = curlr;
+ return true;
}
-/* monitorEnter ****************************************************************
- Acquire the monitor of the given object. If the current thread already
- owns the monitor, the lock counter is simply increased.
+/* threads_suspend_ack *********************************************************
- This function blocks until it can acquire the monitor.
+ Acknowledges the suspension of the current thread.
IN:
- t............the current thread
- o............the object of which to enter the monitor
-
- RETURN VALUE:
- the new lock record of the object when it has been entered
+ pc.....The PC where the thread suspended its execution.
+ sp.....The SP before the thread suspended its execution.
*******************************************************************************/
-monitorLockRecord *monitorEnter(threadobject *t, java_objectheader *o)
+void threads_suspend_ack(u1* pc, u1* sp)
{
- for (;;) {
- monitorLockRecord *lr = o->monitorPtr;
- if (lr->o != o) {
- /* the lock record does not lock this object */
- monitorLockRecord *nlr;
- monitorLockRecord *mlr;
-
- /* allocate a new lock record for this object */
- mlr = allocLockRecordSimple(t);
- mlr->o = o;
-
- /* check if it is the same record the object refered to earlier */
- if (mlr == lr) {
- MEMORY_BARRIER();
- nlr = o->monitorPtr;
- if (nlr == lr) {
- /* the object still refers to the same lock record */
- /* got it! */
- handleWaiter(mlr, lr, o);
- return mlr;
- }
- }
- else {
- /* no, it's another lock record */
- /* if we don't own the old record, set incharge XXX */
- if (lr->ownerThread != t)
- mlr->incharge = lr;
-
- /* if the object still refers to lr, replace it by the new mlr */
- MEMORY_BARRIER_BEFORE_ATOMIC();
- nlr = (monitorLockRecord *) compare_and_swap((long*) &o->monitorPtr, (long) lr, (long) mlr);
- }
-
- if (nlr == lr) {
- /* we swapped the new record in successfully */
- if (mlr == lr || lr->o != o) {
- /* the old lock record is the same as the new one, or */
- /* it locks another object. */
- /* got it! */
- handleWaiter(mlr, lr, o);
- return mlr;
- }
- /* lr locks the object, we have to wait */
- while (lr->o == o)
- queueOnLockRecord(lr, o);
-
- /* got it! */
- handleWaiter(mlr, lr, o);
- return mlr;
- }
-
- /* forget this mlr lock record, wait on nlr and try again */
- freeLockRecord(mlr);
- recycleLockRecord(t, mlr);
- queueOnLockRecord(nlr, o);
- }
- else {
- /* the lock record is for the object we want */
-
- if (lr->ownerThread == t) {
- /* we own it already, just recurse */
- lr->lockCount++;
- return lr;
- }
-
- /* it's locked. we wait and then try again */
- queueOnLockRecord(lr, o);
- }
- }
-}
-
-/* threads_wake_waiters ********************************************************
-
- For each lock record in the given waiter list, post the queueSem
- once for each queuer of the lock record.
+ threadobject *thread;
- IN:
- lr...........the head of the waiter list
+ thread = THREADOBJECT;
-*******************************************************************************/
+ assert(thread->suspend_reason != 0);
-static void threads_wake_waiters(monitorLockRecord *lr)
-{
- monitorLockRecord *tmplr;
- s4 q;
+ /* TODO: remember dump memory size */
- /* move it to a local variable (Stefan commented this especially.
- * Might be important somehow...) */
+#if defined(ENABLE_GC_CACAO)
+ /* inform the GC about the suspension */
+ if (thread->suspend_reason == SUSPEND_REASON_STOPWORLD && gc_pending) {
- tmplr = lr;
+ /* check if the GC wants to leave the thread running */
+ if (!gc_suspend(thread, pc, sp)) {
- do {
- q = tmplr->queuers;
+ /* REMEMBER: we do not unlock the suspendmutex because the thread
+ will suspend itself again at a later time */
+ return;
- while (q--)
- threads_sem_post(&tmplr->queueSem);
+ }
+ }
+#endif
- tmplr = tmplr->waiter;
- } while (tmplr != NULL && tmplr != lr); /* this breaks cycles to lr */
-}
+ /* mark this thread as suspended and remember the PC */
+ thread->pc = pc;
+ thread->suspended = true;
-#define GRAB_LR(lr,t) \
- if (lr->ownerThread != t) { \
- lr = lr->incharge; \
+ /* if we are stopping the world, we should send a global ack */
+ if (thread->suspend_reason == SUSPEND_REASON_STOPWORLD) {
+ threads_sem_post(&suspend_ack);
}
-#define CHECK_MONITORSTATE(lr,t,mo,a) \
- if (lr->o != mo || lr->ownerThread != t) { \
- *exceptionptr = new_illegalmonitorstateexception(); \
- a; \
+ /* release the suspension mutex and wait till we are resumed */
+ /*printf("thread down %p\n", thread);*/
+ pthread_cond_wait(&(thread->suspendcond), &(thread->suspendmutex));
+ /*printf("thread up %p\n", thread);*/
+
+ /* if we are stopping the world, we should send a global ack */
+ if (thread->suspend_reason == SUSPEND_REASON_STOPWORLD) {
+ threads_sem_post(&suspend_ack);
}
-/* monitorExit *****************************************************************
+ /* TODO: free dump memory */
- Decrement the counter of a (currently owned) monitor. If the counter
- reaches zero, release the monitor.
+ /* release the suspendmutex */
+ if (pthread_mutex_unlock(&(thread->suspendmutex)) != 0)
+ vm_abort("threads_suspend_ack: pthread_mutex_unlock failed: %s",
+ strerror(errno));
+}
- If the current thread is not the owner of the monitor, an
- IllegalMonitorState exception is thrown.
- IN:
- t............the current thread
- o............the object of which to exit the monitor
+/* threads_resume_thread *******************************************************
- RETURN VALUE:
- true.........everything ok,
- false........an exception has been thrown
+ Resumes the execution of the passed thread.
*******************************************************************************/
-bool monitorExit(threadobject *t, java_objectheader *o)
+bool threads_resume_thread(threadobject *thread)
{
- monitorLockRecord *lr;
-
- lr = o->monitorPtr;
- GRAB_LR(lr, t);
- CHECK_MONITORSTATE(lr, t, o, return false);
+ /* acquire the suspendmutex */
+ if (pthread_mutex_lock(&(thread->suspendmutex)) != 0)
+ vm_abort("threads_resume_ack: pthread_mutex_unlock failed: %s",
+ strerror(errno));
- /* { the current thread `t` owns the lock record `lr` on object `o` } */
-
- if (lr->lockCount > 1) {
- /* we had locked this one recursively. just decrement, it will */
- /* still be locked. */
- lr->lockCount--;
- return true;
+ if (!thread->suspended) {
+ pthread_mutex_unlock(&(thread->suspendmutex));
+ return false;
}
- /* we are going to unlock and recycle this lock record */
+ thread->suspended = false;
- if (lr->waiter) {
- monitorLockRecord *wlr = lr->waiter;
- if (o->monitorPtr != lr ||
- (void*) compare_and_swap((long*) &o->monitorPtr, (long) lr, (long) wlr) != lr)
- {
- monitorLockRecord *nlr = o->monitorPtr;
- assert(nlr->waiter == NULL);
- nlr->waiter = wlr; /* XXX is it ok to overwrite the nlr->waiter field like that? */
- STORE_ORDER_BARRIER();
- }
- else {
- threads_wake_waiters(wlr);
- }
- lr->waiter = NULL;
- }
+ /* tell everyone that the thread should resume */
+ assert(thread != THREADOBJECT);
+ pthread_cond_broadcast(&(thread->suspendcond));
+
+ /* release the suspendmutex */
+ pthread_mutex_unlock(&(thread->suspendmutex));
- /* unlock and throw away this lock record */
- freeLockRecord(lr);
- recycleLockRecord(t, lr);
return true;
}
-/* threads_remove_waiter *******************************************************
- Remove a waiter lock record from the waiter list of the given lock record
+/* threads_join_all_threads ****************************************************
- IN:
- lr...........the lock record holding the waiter list
- toremove.....the record to remove from the list
+ Join all non-daemon threads.
*******************************************************************************/
-static void threads_remove_waiter(monitorLockRecord *lr,
- monitorLockRecord *toremove)
+void threads_join_all_threads(void)
{
- do {
- if (lr->waiter == toremove) {
- lr->waiter = toremove->waiter;
- break;
- }
- lr = lr->waiter;
- } while (lr); /* XXX need to break cycle? */
+ threadobject *t;
+
+ /* get current thread */
+
+ t = THREADOBJECT;
+
+ /* this thread is waiting for all non-daemon threads to exit */
+
+ threads_thread_state_waiting(t);
+
+ /* enter join mutex */
+
+ threads_mutex_join_lock();
+
+ /* Wait for condition as long as we have non-daemon threads. We
+ compare against 1 because the current (main thread) is also a
+ non-daemon thread. */
+
+ while (threads_list_get_non_daemons() > 1)
+ pthread_cond_wait(&cond_join, &mutex_join);
+
+ /* leave join mutex */
+
+ threads_mutex_join_unlock();
}
+
/* threads_timespec_earlier ****************************************************
Return true if timespec tv1 is earlier than timespec tv2.
(tv1->tv_sec == tv2->tv_sec && tv1->tv_nsec < tv2->tv_nsec);
}
+
/* threads_current_time_is_earlier_than ****************************************
Check if the current time is earlier than the given timespec.
/* get current time */
- if (gettimeofday(&tvnow, NULL) != 0) {
- fprintf(stderr,"error: gettimeofday returned unexpected error %d: %s\n",
- errno, strerror(errno));
- abort();
- }
+ if (gettimeofday(&tvnow, NULL) != 0)
+ vm_abort("gettimeofday failed: %s\n", strerror(errno));
/* convert it to a timespec */
/* threads_wait_with_timeout ***************************************************
- Wait for the given maximum amount of time on a monitor until either
+ Wait until the given point in time on a monitor until either
we are notified, we are interrupted, or the time is up.
IN:
*******************************************************************************/
-static bool threads_wait_with_timeout(threadobject *t,
+static bool threads_wait_with_timeout(threadobject *thread,
struct timespec *wakeupTime)
{
bool wasinterrupted;
- /* acquire the waitLock */
+ /* acquire the waitmutex */
- pthread_mutex_lock(&t->waitLock);
+ pthread_mutex_lock(&thread->waitmutex);
/* mark us as sleeping */
- t->isSleeping = true;
+ thread->sleeping = true;
- /* wait on waitCond */
+ /* 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->waitLock, wakeupTime);
+ threads_thread_state_timed_waiting(thread);
+
+ pthread_cond_timedwait(&thread->waitcond, &thread->waitmutex,
+ wakeupTime);
+
+ threads_thread_state_runnable(thread);
}
}
else {
/* no timeout */
- while (!t->interrupted && !t->signaled)
- pthread_cond_wait(&t->waitCond, &t->waitLock);
+ while (!thread->interrupted && !thread->signaled) {
+ threads_thread_state_waiting(thread);
+
+ pthread_cond_wait(&thread->waitcond, &thread->waitmutex);
+
+ threads_thread_state_runnable(thread);
+ }
}
/* check if we were interrupted */
- wasinterrupted = t->interrupted;
+ wasinterrupted = thread->interrupted;
/* reset all flags */
- t->interrupted = false;
- t->signaled = false;
- t->isSleeping = false;
+ thread->interrupted = false;
+ thread->signaled = false;
+ thread->sleeping = false;
- /* release the waitLock */
+ /* release the waitmutex */
- pthread_mutex_unlock(&t->waitLock);
+ pthread_mutex_unlock(&thread->waitmutex);
return wasinterrupted;
}
-static void calcAbsoluteTime(struct timespec *tm, s8 millis, s4 nanos)
-{
- if (millis || nanos) {
- struct timeval tv;
- long nsec;
- gettimeofday(&tv, NULL);
- tv.tv_sec += millis / 1000;
- millis %= 1000;
- nsec = tv.tv_usec * 1000 + (s4) millis * 1000000 + nanos;
- tm->tv_sec = tv.tv_sec + nsec / 1000000000;
- tm->tv_nsec = nsec % 1000000000;
- }
- else {
- tm->tv_sec = 0;
- tm->tv_nsec = 0;
- }
-}
-
-/* monitorWait *****************************************************************
+/* threads_wait_with_timeout_relative ******************************************
- Wait on an object for a given (maximum) amount of time.
+ Wait for the given maximum amount of time on a monitor until either
+ we are notified, we are interrupted, or the time is up.
IN:
t............the current thread
- o............the object
- millis.......milliseconds of timeout
- nanos........nanoseconds of timeout
+ millis.......milliseconds to wait
+ nanos........nanoseconds to wait
+
+ RETURN VALUE:
+ true.........if the wait has been interrupted,
+ false........if the wait was ended by notification or timeout
- PRE-CONDITION:
- The current thread must be the owner of the object's monitor.
-
*******************************************************************************/
-void monitorWait(threadobject *t, java_objectheader *o, s8 millis, s4 nanos)
+bool threads_wait_with_timeout_relative(threadobject *thread, s8 millis,
+ s4 nanos)
{
- bool wasinterrupted;
struct timespec wakeupTime;
- monitorLockRecord *newlr;
- monitorLockRecord *lr;
-
- lr = o->monitorPtr;
- GRAB_LR(lr, t);
- CHECK_MONITORSTATE(lr, t, o, return);
-
- /* { the thread t owns the lock record lr on the object o } */
/* calculate the the (latest) wakeup time */
- calcAbsoluteTime(&wakeupTime, millis, nanos);
-
- /* wake threads waiting on this record XXX why? */
-
- if (lr->waiter)
- threads_wake_waiters(lr->waiter);
-
- /* mark the lock record as "waiting on object o" */
-
- lr->waiting = o;
- STORE_ORDER_BARRIER();
-
- /* unlock this record */
-
- freeLockRecord(lr);
-
- /* wait until notified/interrupted/timed out */
-
- wasinterrupted = threads_wait_with_timeout(t, &wakeupTime);
-
- /* re-enter the monitor */
+ threads_calc_absolute_time(&wakeupTime, millis, nanos);
- newlr = monitorEnter(t, o);
+ /* wait */
- /* we are no longer waiting */
-
- threads_remove_waiter(newlr, lr);
- newlr->lockCount = lr->lockCount;
-
- /* recylce the old lock record */
-
- lr->lockCount = 1;
- lr->waiting = NULL;
- lr->waiter = NULL;
- recycleLockRecord(t, lr);
-
- /* if we have been interrupted, throw the appropriate exception */
-
- if (wasinterrupted)
- *exceptionptr = new_exception(string_java_lang_InterruptedException);
+ return threads_wait_with_timeout(thread, &wakeupTime);
}
-/* notifyOneOrAll **************************************************************
- Notify one thread or all threads waiting on the given object.
+/* threads_calc_absolute_time **************************************************
+
+ Calculate the absolute point in time a given number of ms and ns from now.
IN:
- t............the current thread
- o............the object
- one..........if true, only notify one thread
+ millis............milliseconds from now
+ nanos.............nanoseconds from now
+
+ OUT:
+ *tm...............receives the timespec of the absolute point in time
- PRE-CONDITION:
- The current thread must be the owner of the object's monitor.
-
*******************************************************************************/
-static void notifyOneOrAll(threadobject *t, java_objectheader *o, bool one)
+static void threads_calc_absolute_time(struct timespec *tm, s8 millis, s4 nanos)
{
- monitorLockRecord *lr;
- monitorLockRecord *wlr;
- threadobject *wthread;
-
- lr = o->monitorPtr;
- GRAB_LR(lr, t);
- CHECK_MONITORSTATE(lr, t, o, return);
-
- /* { the thread t owns the lock record lr on the object o } */
-
- /* for each waiter: */
-
- for (wlr = lr->waiter; wlr; wlr = wlr->waiter) {
-
- /* signal the waiting thread */
-
- wthread = wlr->ownerThread;
- pthread_mutex_lock(&wthread->waitLock);
- if (wthread->isSleeping)
- pthread_cond_signal(&wthread->waitCond);
- wthread->signaled = true;
- pthread_mutex_unlock(&wthread->waitLock);
-
- /* if we should only wake one, we are done */
-
- if (one)
- break;
+ if ((millis != 0x7fffffffffffffffLLU) && (millis || nanos)) {
+ struct timeval tv;
+ long nsec;
+ gettimeofday(&tv, NULL);
+ tv.tv_sec += millis / 1000;
+ millis %= 1000;
+ nsec = tv.tv_usec * 1000 + (s4) millis * 1000000 + nanos;
+ tm->tv_sec = tv.tv_sec + nsec / 1000000000;
+ tm->tv_nsec = nsec % 1000000000;
+ }
+ else {
+ tm->tv_sec = 0;
+ tm->tv_nsec = 0;
}
}
-/* threadHoldsLock *************************************************************
-
- Return true if the given thread owns the monitor of the given object.
-
- IN:
- t............the thread
- o............the object
-
- RETURN VALUE:
- true, if the thread is locking the object
-
-*******************************************************************************/
-
-bool threadHoldsLock(threadobject *t, java_objectheader *o)
-{
- monitorLockRecord *lr;
-
- lr = o->monitorPtr;
- GRAB_LR(lr, t);
- return (lr->o == o) && (lr->ownerThread == t);
-}
-
-/* interruptThread *************************************************************
+/* threads_thread_interrupt ****************************************************
Interrupt the given thread.
- The thread gets the "waitCond" signal and
+ The thread gets the "waitcond" signal and
its interrupted flag is set to true.
IN:
*******************************************************************************/
-void interruptThread(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. */
- /* signal the thread a "waitCond" and tell it that it has been */
- /* interrupted */
+ pthread_kill(thread->tid, SIGHUP);
- pthread_mutex_lock(&t->waitLock);
- if (t->isSleeping)
- pthread_cond_signal(&t->waitCond);
- t->interrupted = true;
- pthread_mutex_unlock(&t->waitLock);
+ if (thread->sleeping)
+ pthread_cond_signal(&thread->waitcond);
+
+ thread->interrupted = true;
+
+ pthread_mutex_unlock(&thread->waitmutex);
}
-/* interruptedThread ***********************************************************
+
+/* threads_check_if_interrupted_and_reset **************************************
Check if the current thread has been interrupted and reset the
interruption flag.
*******************************************************************************/
-bool interruptedThread()
+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;
}
-/* isInterruptedThread *********************************************************
+
+/* threads_thread_has_been_interrupted *****************************************
Check if the given thread has been interrupted
*******************************************************************************/
-bool isInterruptedThread(java_lang_VMThread *thread)
+bool threads_thread_has_been_interrupted(threadobject *thread)
{
- threadobject *t;
-
- t = (threadobject*) thread;
-
- return t->interrupted;
+ return thread->interrupted;
}
-/* thread_sleep ****************************************************************
+
+/* threads_sleep ***************************************************************
Sleep the current thread for the specified amount of time.
*******************************************************************************/
-void thread_sleep(s8 millis, s4 nanos)
+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;
- calcAbsoluteTime(&wakeupTime, millis, nanos);
+ 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);
-}
-
-void yieldThread()
-{
- sched_yield();
-}
-
-void setPriorityThread(thread *t, s4 priority)
-{
- nativethread *info = &((threadobject*) t->vmThread)->info;
- threads_set_thread_priority(info->tid, priority);
+ exceptions_throw_interruptedexception();
}
-void wait_cond_for_object(java_objectheader *o, s8 millis, s4 nanos)
-{
- threadobject *t = (threadobject*) THREADOBJECT;
- monitorWait(t, o, millis, nanos);
-}
-
-void signal_cond_for_object(java_objectheader *o)
-{
- threadobject *t = (threadobject*) THREADOBJECT;
- notifyOneOrAll(t, o, true);
-}
-
-void broadcast_cond_for_object(java_objectheader *o)
-{
- threadobject *t = (threadobject*) THREADOBJECT;
- notifyOneOrAll(t, o, false);
-}
+/* threads_yield ***************************************************************
-/* threads_dump ****************************************************************
-
- Dumps info for all threads running in the JVM. This function is
- called when SIGQUIT (<ctrl>-\) is sent to CACAO.
+ Yield to the scheduler.
*******************************************************************************/
-void threads_dump(void)
+void threads_yield(void)
{
- threadobject *tobj;
- java_lang_VMThread *vmt;
- nativethread *nt;
- 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;
- nt = &tobj->info;
- 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, nt->tid);
-#else
- printf("prio=%d tid=0x%08lx\n", t->priority, nt->tid);
-#endif
-
- /* send SIGUSR1 to thread to print stacktrace */
-
- pthread_kill(nt->tid, SIGUSR1);
-
- /* sleep this thread a bit, so the signal can reach the thread */
-
- thread_sleep(10, 0);
- }
-
- tobj = tobj->info.next;
- } while (tobj && (tobj != mainthreadobj));
+ sched_yield();
}
projects / cacao.git / blobdiff