/* 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 4866 2006-05-01 21:40:38Z edwin $
-
*/
#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"
+
+#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
-#ifdef MUTEXSIM
+#if defined(__DARWIN__)
+/* Darwin has no working semaphore implementation. This one is taken
+ from Boehm-GC. */
-/* We need this for older MacOSX (10.1.x) */
+/*
+ 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);
-typedef struct {
- pthread_mutex_t mutex;
- pthread_t owner;
- int count;
-} pthread_mutex_rec_t;
+ sem->value = value;
+
+ if (pthread_mutex_init(&sem->mutex, NULL) < 0)
+ return -1;
-static void pthread_mutex_init_rec(pthread_mutex_rec_t *m)
-{
- pthread_mutex_init(&m->mutex, NULL);
- m->count = 0;
+ if (pthread_cond_init(&sem->cond, NULL) < 0)
+ return -1;
+
+ 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
+
+
+/* startupinfo *****************************************************************
+
+ Struct used to pass info from threads_start_thread to
+ threads_startup_thread.
-#else /* MUTEXSIM */
+******************************************************************************/
+
+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;
-#define pthread_mutex_lock_rec pthread_mutex_lock
-#define pthread_mutex_unlock_rec pthread_mutex_unlock
-#define pthread_mutex_rec_t pthread_mutex_t
+/* 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 0
+
+/* this is one of the STOPWORLD_FROM_ constants, telling why the world is */
+/* being stopped */
+static volatile int stopworldwhere;
+
+/* 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));
}
-static void setPriority(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);
-}
+/* lock_stopworld **************************************************************
-static avl_tree *criticaltree;
-threadobject *mainthreadobj;
+ Enter the stopworld lock, specifying why the world shall be stopped.
-#ifndef HAVE___THREAD
-pthread_key_t tkey_threadinfo;
-#else
-__thread threadobject *threadobj;
-#endif
+ IN:
+ where........ STOPWORLD_FROM_GC (1) from within GC
+ STOPWORLD_FROM_CLASS_NUMBERING (2) class numbering
-static pthread_mutex_rec_t compiler_mutex;
+******************************************************************************/
-void compiler_lock()
+void lock_stopworld(int where)
{
- pthread_mutex_lock_rec(&compiler_mutex);
+ pthread_mutex_lock(&stopworldlock);
+/* stopworldwhere = where; */
}
-void compiler_unlock()
-{
- pthread_mutex_unlock_rec(&compiler_mutex);
-}
-static s4 criticalcompare(const void *pa, const void *pb)
-{
- const threadcritnode *na = pa;
- const threadcritnode *nb = pb;
+/* unlock_stopworld ************************************************************
- if (na->mcodebegin < nb->mcodebegin)
- return -1;
- if (na->mcodebegin > nb->mcodebegin)
- return 1;
- return 0;
-}
+ Release the stopworld lock.
+******************************************************************************/
-static const threadcritnode *findcritical(u1 *mcodeptr)
+void unlock_stopworld(void)
{
- 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;
- }
- }
- }
+/* stopworldwhere = 0; */
+ pthread_mutex_unlock(&stopworldlock);
}
+/* XXX We disable that whole bunch of code until we have the exact-GC
+ running. */
-void thread_registercritical(threadcritnode *n)
-{
- avl_insert(criticaltree, n);
-}
+#if 0
-u1 *thread_checkcritical(u1 *mcodeptr)
+#if !defined(__DARWIN__)
+/* Caller must hold threadlistlock */
+static s4 threads_cast_sendsignals(s4 sig)
{
- const threadcritnode *n = findcritical(mcodeptr);
- return (n && mcodeptr < n->mcodeend && mcodeptr > n->mcodebegin) ? n->mcoderestart : NULL;
-}
+ threadobject *t;
+ threadobject *self;
+ s4 count;
-static void thread_addstaticcritical()
-{
- /* XXX TWISTI: this is just a quick hack */
-#if defined(ENABLE_JIT)
- threadcritnode *n = &asm_criticalsections;
+ self = THREADOBJECT;
- while (n->mcodebegin)
- thread_registercritical(n++);
-#endif
-}
+ /* iterate over all started threads */
-static pthread_mutex_t threadlistlock;
+ count = 0;
-static pthread_mutex_t stopworldlock;
-volatile int stopworldwhere;
+ for (t = threads_list_first(); t != NULL; t = threads_list_next(t)) {
+ /* don't send the signal to ourself */
-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 == self)
+ continue;
-/*
- * where - 1 from within GC
- 2 class numbering
- */
-void lock_stopworld(int where)
-{
- pthread_mutex_lock(&stopworldlock);
- stopworldwhere = where;
-}
+ /* don't send the signal to NEW threads (because they are not
+ completely initialized) */
-void unlock_stopworld()
-{
- stopworldwhere = 0;
- pthread_mutex_unlock(&stopworldlock);
-}
+ if (t->state == THREAD_STATE_NEW)
+ continue;
-#if !defined(__DARWIN__)
-/* Caller must hold threadlistlock */
-static int cast_sendsignals(int sig, int count)
-{
- /* Count threads */
- threadobject *tobj = mainthreadobj;
- nativethread *infoself = THREADINFO;
+ /* send the signal */
- if (count == 0) {
- do {
- count++;
- tobj = tobj->info.next;
- } while (tobj != mainthreadobj);
+ pthread_kill(t->tid, sig);
+
+ /* increase threads count */
+
+ 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);
}
#endif
-void cast_stopworld()
+#if !defined(DISABLE_GC)
+
+void threads_cast_stopworld(void)
{
- int count, i;
- lock_stopworld(2);
- pthread_mutex_lock(&threadlistlock);
+#if !defined(__DARWIN__) && !defined(__CYGWIN__)
+ s4 count, i;
+#endif
+
+ lock_stopworld(STOPWORLD_FROM_CLASS_NUMBERING);
+
+ /* lock the threads lists */
+
+ threads_list_lock();
+
#if defined(__DARWIN__)
- cast_darwinstop();
+ threads_cast_darwinstop();
+#elif defined(__CYGWIN__)
+ /* TODO */
+ assert(0);
#else
- count = cast_sendsignals(GC_signum1(), 0);
- for (i=0; i<count; i++)
+ /* send all threads the suspend signal */
+
+ count = threads_cast_sendsignals(GC_signum1());
+
+ /* wait for all threads signaled to suspend */
+
+ for (i = 0; i < count; i++)
threads_sem_wait(&suspend_ack);
#endif
- pthread_mutex_unlock(&threadlistlock);
+
+ /* ATTENTION: Don't unlock the threads-lists here so that
+ non-signaled NEW threads can't change their state and execute
+ code. */
}
-void cast_startworld()
+
+void threads_cast_startworld(void)
{
- pthread_mutex_lock(&threadlistlock);
#if defined(__DARWIN__)
- cast_darwinresume();
+ threads_cast_darwinresume();
#elif defined(__MIPS__)
- cast_irixresume();
+ threads_cast_irixresume();
+#elif defined(__CYGWIN__)
+ /* TODO */
+ assert(0);
#else
- cast_sendsignals(GC_signum2(), -1);
+ (void) threads_cast_sendsignals(GC_signum2());
#endif
- pthread_mutex_unlock(&threadlistlock);
+
+ /* unlock the threads lists */
+
+ threads_list_unlock();
+
unlock_stopworld();
}
+
#if !defined(__DARWIN__)
-static void sigsuspend_handler(ucontext_t *ctx)
+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);
#endif
}
-int cacao_suspendhandler(ucontext_t *ctx)
+#endif
+
+
+/* This function is called from Boehm GC code. */
+
+int cacao_suspendhandler(ucontext_t *_uc)
{
- if (stopworldwhere != 2)
+ if (stopworldwhere != STOPWORLD_FROM_CLASS_NUMBERING)
return 0;
- sigsuspend_handler(ctx);
+ threads_sigsuspend_handler(_uc);
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
-}
+#endif /* DISABLE_GC */
+
+#endif /* 0 */
-/* thread_setself **************************************************************
+/* threads_set_current_threadobject ********************************************
- XXX
+ Set the current thread object.
+
+ IN:
+ thread.......the thread object to set
*******************************************************************************/
-void *thread_getself(void)
+void threads_set_current_threadobject(threadobject *thread)
{
- return THREADOBJECT;
+#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
}
-static monitorLockRecord *dummyLR;
-
-static void initPools();
-
+/* threads_impl_thread_new *****************************************************
-/* thread_preinit **************************************************************
+ Initialize implementation fields of a threadobject.
- Do some early initialization of stuff required.
+ IN:
+ t....the threadobject
*******************************************************************************/
-void threads_preinit(void)
+void threads_impl_thread_new(threadobject *t)
{
-#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
+ /* get the pthread id */
- pthread_mutex_init(&threadlistlock, NULL);
- pthread_mutex_init(&stopworldlock, NULL);
+ t->tid = pthread_self();
- /* Allocate something so the garbage collector's signal handlers
- are installed. */
- heap_allocate(1, false, NULL);
+ /* initialize the mutex and the condition */
- mainthreadobj = NEW(threadobject);
- mainthreadobj->info.tid = pthread_self();
-#if !defined(HAVE___THREAD)
- pthread_key_create(&tkey_threadinfo, NULL);
+ pthread_mutex_init(&(t->waitmutex), NULL);
+ pthread_cond_init(&(t->waitcond), NULL);
+
+#if defined(ENABLE_DEBUG_FILTER)
+ /* Initialize filter counters */
+ t->filterverbosecallctr[0] = 0;
+ t->filterverbosecallctr[1] = 0;
#endif
- setthreadobject(mainthreadobj);
- initPools();
- /* Every newly created object's monitorPtr points here so we save
- a check against NULL */
+#if !defined(NDEBUG)
+ t->tracejavacallindent = 0;
+ t->tracejavacallcount = 0;
+#endif
+}
- dummyLR = NEW(monitorLockRecord);
- dummyLR->o = NULL;
- dummyLR->ownerThread = NULL;
- dummyLR->waiting = NULL;
- dummyLR->incharge = dummyLR;
- /* we need a working dummyLR before initializing the critical
- section tree */
+/* threads_impl_thread_free ****************************************************
- criticaltree = avl_create(&criticalcompare);
+ Cleanup thread stuff.
- thread_addstaticcritical();
- threads_sem_init(&suspend_ack, 0, 0);
-}
+ IN:
+ t....the threadobject
+*******************************************************************************/
-static pthread_attr_t threadattr;
+void threads_impl_thread_free(threadobject *t)
+{
+ /* destroy the mutex and the condition */
-static void freeLockRecordPools(lockRecordPool *);
+ 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));
+}
-/* threads_init ****************************************************************
- Initializes the threads required by the JVM: main, finalizer.
+/* threads_get_current_threadobject ********************************************
+
+ Return the threadobject of the current thread.
+
+ RETURN VALUE:
+ the current threadobject * (an instance of java.lang.Thread)
*******************************************************************************/
-bool threads_init(u1 *stackbottom)
+threadobject *threads_get_current_threadobject(void)
{
- java_lang_String *threadname;
- java_lang_Thread *mainthread;
- java_lang_ThreadGroup *threadgroup;
- threadobject *tempthread;
- methodinfo *method;
-
- tempthread = mainthreadobj;
-
- freeLockRecordPools(mainthreadobj->ee.lrpool);
-
- /* 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. */
+ return THREADOBJECT;
+}
- class_java_lang_VMThread->instancesize = sizeof(threadobject);
- /* create a VMThread */
+/* threads_impl_preinit ********************************************************
- mainthreadobj = (threadobject *) builtin_new(class_java_lang_VMThread);
+ Do some early initialization of stuff required.
- if (!mainthreadobj)
- return false;
+ ATTENTION: Do NOT use any Java heap allocation here, as gc_init()
+ is called AFTER this function!
- FREE(tempthread, threadobject);
+*******************************************************************************/
- initThread(&mainthreadobj->o);
+void threads_impl_preinit(void)
+{
+ pthread_mutex_init(&stopworldlock, NULL);
- setthreadobject(mainthreadobj);
+ /* initialize exit mutex and condition (on exit we join all
+ threads) */
- initLocks();
+ pthread_mutex_init(&mutex_join, NULL);
+ pthread_cond_init(&cond_join, NULL);
- mainthreadobj->info.next = mainthreadobj;
- mainthreadobj->info.prev = mainthreadobj;
+ /* initialize the threads-list mutex */
-#if defined(ENABLE_INTRP)
- /* create interpreter stack */
+ pthread_mutex_init(&mutex_threads_list, NULL);
- if (opt_intrp) {
- MSET(intrp_main_stack, 0, u1, opt_stacksize);
- mainthreadobj->info._global_sp = intrp_main_stack + opt_stacksize;
- }
+#if !defined(HAVE___THREAD)
+ pthread_key_create(&threads_current_threadobject_key, NULL);
#endif
- threadname = javastring_new(utf_new_char("main"));
+/* threads_sem_init(&suspend_ack, 0, 0); */
+}
- /* allocate and init ThreadGroup */
- threadgroup = (java_lang_ThreadGroup *)
- native_new_and_init(class_java_lang_ThreadGroup);
+/* threads_list_lock ***********************************************************
- if (!threadgroup)
- throw_exception_exit();
+ Enter the threads table mutex.
- /* create a Thread */
+ 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.
- mainthread = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
+*******************************************************************************/
- if (!mainthread)
- throw_exception_exit();
+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));
+}
- mainthreadobj->o.thread = mainthread;
- /* call Thread.<init>(Ljava/lang/VMThread;Ljava/lang/String;IZ)V */
+/* threads_list_unlock *********************************************************
- 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);
+ Leave the threads list mutex.
- if (!method)
- return false;
+*******************************************************************************/
- (void) vm_call_method(method, (java_objectheader *) mainthread,
- mainthreadobj, threadname, 5, false);
+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));
+}
- if (*exceptionptr)
- return false;
- mainthread->group = threadgroup;
+/* threads_mutex_join_lock *****************************************************
- /* add mainthread to ThreadGroup */
+ Enter the join mutex.
- method = class_resolveclassmethod(class_java_lang_ThreadGroup,
- utf_new_char("addThread"),
- utf_new_char("(Ljava/lang/Thread;)V"),
- class_java_lang_ThreadGroup,
- true);
+*******************************************************************************/
+
+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);
+#elif defined(WITH_CLASSPATH_SUN)
+ method_thread_init =
+ class_resolveclassmethod(class_java_lang_Thread,
+ utf_init,
+ utf_new_char("(Ljava/lang/String;)V"),
+ class_java_lang_Thread,
+ true);
+#elif defined(WITH_CLASSPATH_CLDC1_1)
+ method_thread_init =
+ class_resolveclassmethod(class_java_lang_Thread,
+ utf_init,
+ utf_new_char("(Ljava/lang/String;)V"),
+ class_java_lang_Thread,
+ true);
+#else
+# error unknown classpath configuration
+#endif
- if (!method)
+ if (method_thread_init == NULL)
return false;
- (void) vm_call_method(method, (java_objectheader *) threadgroup,
- mainthread);
+ /* Get the main-thread (NOTE: The main threads is always the first
+ thread in the list). */
+
+ mainthread = threads_list_first();
+
+ /* create a java.lang.Thread for the main thread */
- if (*exceptionptr)
+ t = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
+
+ if (t == NULL)
return false;
- setPriority(pthread_self(), 5);
+ /* set the object in the internal data structure */
- pthread_attr_init(&threadattr);
- pthread_attr_setdetachstate(&threadattr, PTHREAD_CREATE_DETACHED);
+ mainthread->object = t;
- /* everything's ok */
+#if defined(ENABLE_INTRP)
+ /* create interpreter stack */
- return true;
-}
+ 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"));
-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;
-}
+#if defined(ENABLE_JAVASE)
+ /* allocate and init ThreadGroup */
-static void initThreadLocks(threadobject *);
+ threadgroup = (java_lang_ThreadGroup *)
+ native_new_and_init(class_java_lang_ThreadGroup);
+ if (threadgroup == NULL)
+ return false;
+#endif
-typedef struct {
- threadobject *thread;
- functionptr function;
- sem_t *psem;
- sem_t *psem_first;
-} startupinfo;
+#if defined(WITH_CLASSPATH_GNU)
+ /* create a java.lang.VMThread for the main thread */
+ vmt = (java_lang_VMThread *) builtin_new(class_java_lang_VMThread);
-/* threads_startup *************************************************************
+ if (vmt == NULL)
+ return false;
+
+ /* set the thread */
+
+ LLNI_field_set_ref(vmt, thread, t);
+ LLNI_field_set_val(vmt, vmdata, (java_lang_Object *) mainthread);
+
+ /* call java.lang.Thread.<init>(Ljava/lang/VMThread;Ljava/lang/String;IZ)V */
+ o = (java_handle_t *) t;
+
+ (void) vm_call_method(method_thread_init, o, vmt, threadname, NORM_PRIORITY,
+ false);
+
+#elif defined(WITH_CLASSPATH_SUN)
+
+ /* We trick java.lang.Thread.<init>, which sets the priority of
+ the current thread to the parent's one. */
+
+ t->priority = NORM_PRIORITY;
+
+ /* Call java.lang.Thread.<init>(Ljava/lang/String;)V */
+
+ o = (java_object_t *) t;
+
+ (void) vm_call_method(method_thread_init, o, threadname);
+
+#elif defined(WITH_CLASSPATH_CLDC1_1)
+
+ /* set the thread */
+
+ t->vm_thread = (java_lang_Object *) mainthread;
+
+ /* call public Thread(String name) */
+
+ 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:
+ 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;
+ 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);
- t = NULL;
#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 */
+
+ threads_set_current_threadobject(thread);
+
+ /* set our priority */
- pthread_mutex_lock(&threadlistlock);
+ threads_set_thread_priority(thread->tid, LLNI_field_direct(thread->object, priority));
- info->prev = mainthreadobj;
- info->next = tnext = mainthreadobj->info.next;
- mainthreadobj->info.next = thread;
- tnext->info.prev = thread;
+ /* thread is completely initialized */
- pthread_mutex_unlock(&threadlistlock);
+ threads_thread_state_runnable(thread);
- initThreadLocks(thread);
+ /* tell threads_startup_thread that we registered ourselves */
+ /* CAUTION: *startup becomes invalid with this! */
startup = NULL;
threads_sem_post(psem);
- setPriority(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 */
+
+ _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 (!method)
- throw_exception();
+#if defined(WITH_CLASSPATH_GNU)
+ /* we need to start the run method of java.lang.VMThread */
- (void) vm_call_method(method, (java_objectheader *) thread);
+ 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
+
+ /* 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);
+ /* We ignore the return value. */
- /* reset thread id (lock on joinMutex? TWISTI) */
+ (void) threads_detach_thread(thread);
- pthread_mutex_lock(&info->joinMutex);
- info->tid = 0;
- pthread_mutex_unlock(&info->joinMutex);
+ /* set ThreadMXBean variables */
- pthread_cond_broadcast(&info->joinCond);
+ _Jv_jvm->java_lang_management_ThreadMXBean_ThreadCount--;
return NULL;
}
-/* threads_start_thread ********************************************************
+/* threads_impl_thread_start ***************************************************
+
+ Start a thread in the JVM. Both (vm internal and java) thread
+ objects exist.
- Start a thread in the JVM.
+ 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_start_thread(thread *t, functionptr function)
+void threads_impl_thread_start(threadobject *thread, functionptr f)
{
- nativethread *info;
- sem_t sem;
- sem_t sem_first;
- startupinfo startup;
+ sem_t sem;
+ sem_t sem_first;
+ pthread_attr_t attr;
+ startupinfo startup;
+ int ret;
- info = &((threadobject *) t->vmThread)->info;
+ /* fill startupinfo structure passed by pthread_create to
+ * threads_startup_thread */
- /* fill startupinfo structure passed by pthread_create to XXX */
-
- startup.thread = (threadobject*) t->vmThread;
- startup.function = function; /* maybe we don't call Thread.run()V */
+ 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);
-
- if (pthread_create(&info->tid, &threadattr, threads_startup_thread,
- &startup)) {
- log_text("pthread_create failed");
- assert(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);
}
-/* At the end of the program, we wait for all running non-daemon threads to die
- */
+/* threads_set_thread_priority *************************************************
-static threadobject *findNonDaemon(threadobject *thread)
-{
- while (thread != mainthreadobj) {
- if (!thread->o.thread->daemon)
- return thread;
- thread = thread->info.prev;
- }
+ Set the priority of the given thread.
- return NULL;
-}
+ IN:
+ tid..........thread id
+ priority.....priority to set
-void joinAllThreads()
-{
- 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);
-}
+******************************************************************************/
-static void initLockRecord(monitorLockRecord *r, threadobject *t)
+void threads_set_thread_priority(pthread_t tid, int priority)
{
- 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);
+ struct sched_param schedp;
+ int policy;
+
+ pthread_getschedparam(tid, &policy, &schedp);
+ schedp.sched_priority = priority;
+ pthread_setschedparam(tid, policy, &schedp);
}
-/* No lock record must ever be destroyed because there may still be references
- * to it.
-static void destroyLockRecord(monitorLockRecord *r)
-{
- sem_destroy(&r->queueSem);
- pthread_mutex_destroy(&r->resolveLock);
- pthread_cond_destroy(&r->resolveWait);
-}
-*/
+/* threads_attach_current_thread ***********************************************
-void initLocks()
-{
- initThreadLocks(mainthreadobj);
-}
+ Attaches the current thread to the VM. Used in JNI.
-static void initThreadLocks(threadobject *thread)
-{
- thread->ee.firstLR = NULL;
- thread->ee.lrpool = NULL;
- thread->ee.numlr = 0;
-}
+*******************************************************************************/
-static lockRecordPool *allocNewLockRecordPool(threadobject *thread, int size)
+bool threads_attach_current_thread(JavaVMAttachArgs *vm_aargs, bool isdaemon)
{
- lockRecordPool *p = mem_alloc(sizeof(lockRecordPoolHeader) + sizeof(monitorLockRecord) * size);
- int i;
+ threadobject *thread;
+ utf *u;
+ java_handle_t *s;
+ java_handle_t *o;
+ java_lang_Thread *t;
- 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 defined(ENABLE_JAVASE)
+ java_lang_ThreadGroup *group;
+ threadobject *mainthread;
+ classinfo *c;
+ methodinfo *m;
+#endif
-#define INITIALLOCKRECORDS 8
+#if defined(WITH_CLASSPATH_GNU)
+ java_lang_VMThread *vmt;
+#endif
-pthread_mutex_t pool_lock;
-lockRecordPool *global_pool;
+ /* Enter the join-mutex, so if the main-thread is currently
+ waiting to join all threads, the number of non-daemon threads
+ is correct. */
-static void initPools()
-{
- pthread_mutex_init(&pool_lock, NULL);
-}
+ threads_mutex_join_lock();
-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;
-
- return pool;
+ /* 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");
}
- pthread_mutex_unlock(&pool_lock);
+#endif
- return allocNewLockRecordPool(t, size);
-}
+#if defined(ENABLE_INTRP)
+ /* create interpreter stack */
-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);
-}
+ if (opt_intrp) {
+ MSET(intrp_main_stack, 0, u1, opt_stacksize);
+ thread->_global_sp = (Cell *) (intrp_main_stack + opt_stacksize);
+ }
+#endif
-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(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
}
-
- t->ee.firstLR = r->nextFree;
-#ifndef NDEBUG
- r->nextFree = NULL; /* in order to find invalid uses of nextFree */
+ else {
+ u = utf_null;
+#if defined(ENABLE_JAVASE)
+ /* get the main thread */
+
+ mainthread = threads_list_first();
+ group = LLNI_field_direct(mainthread->object, group);
#endif
- return r;
-}
+ }
-static inline void recycleLockRecord(threadobject *t, monitorLockRecord *r)
-{
- assert(t);
- assert(r);
- assert(r->ownerThread == t);
- assert(r->nextFree == NULL);
-
- r->nextFree = t->ee.firstLR;
- t->ee.firstLR = r;
-}
+ /* the the thread name */
-void initObjectLock(java_objectheader *o)
-{
- assert(o);
+ s = javastring_new(u);
- o->monitorPtr = dummyLR;
-}
+ /* for convenience */
+ o = (java_handle_t *) thread->object;
-/* get_dummyLR *****************************************************************
+#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
- 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.
+ if (exceptions_get_exception())
+ return false;
-*******************************************************************************/
+#if defined(ENABLE_JAVASE)
+ /* store the thread group in the object */
-monitorLockRecord *get_dummyLR(void)
-{
- return dummyLR;
-}
+ LLNI_field_direct(thread->object, group) = group;
+ /* add thread to given thread-group */
-static void queueOnLockRecord(monitorLockRecord *lr, java_objectheader *o)
-{
- atomic_add(&lr->queuers, 1);
+ LLNI_class_get(group, c);
- MEMORY_BARRIER_AFTER_ATOMIC();
+ m = class_resolveclassmethod(c,
+ utf_addThread,
+ utf_java_lang_Thread__V,
+ class_java_lang_ThreadGroup,
+ true);
- if (lr->o == o)
- threads_sem_wait(&lr->queueSem);
+ o = (java_handle_t *) group;
- atomic_add(&lr->queuers, -1);
-}
+ (void) vm_call_method(m, o, t);
-static void freeLockRecord(monitorLockRecord *lr)
-{
- int q;
- lr->o = NULL;
- MEMORY_BARRIER();
- q = lr->queuers;
- while (q--)
- threads_sem_post(&lr->queueSem);
-}
+ if (exceptions_get_exception())
+ return false;
+#endif
-static inline void handleWaiter(monitorLockRecord *mlr, monitorLockRecord *lr, java_objectheader *o)
-{
- if (lr->waiting == o)
- mlr->waiter = lr;
+ return true;
}
-monitorLockRecord *monitorEnter(threadobject *t, java_objectheader *o)
+
+/* threads_detach_thread *******************************************************
+
+ Detaches the passed thread from the VM. Used in JNI.
+
+*******************************************************************************/
+
+bool threads_detach_thread(threadobject *t)
{
- 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 defined(ENABLE_JAVASE)
+ java_lang_Thread *object;
+ java_lang_ThreadGroup *group;
+ java_handle_t *e;
+ java_lang_Object *handler;
+ classinfo *c;
+ methodinfo *m;
+ java_handle_t *o;
+#endif
+
+#if defined(ENABLE_JAVASE)
+ object = t->object;
+
+ group = LLNI_field_direct(object, group);
- if (lr->ownerThread == t) {
- /* we own it already, just recurse */
- lr->lockCount++;
- return lr;
- }
+ /* If there's an uncaught exception, call uncaughtException on the
+ thread's exception handler, or the thread's group if this is
+ unset. */
- /* it's locked. we wait and then try again */
- queueOnLockRecord(lr, o);
+ e = exceptions_get_and_clear_exception();
+
+ if (e != NULL) {
+ /* We use a java_lang_Object here, as it's not trivial to
+ build the java_lang_Thread_UncaughtExceptionHandler header
+ file. */
+
+# if defined(WITH_CLASSPATH_GNU)
+ handler = (java_lang_Object *) LLNI_field_direct(object, exceptionHandler);
+# elif defined(WITH_CLASSPATH_SUN)
+ handler = (java_lang_Object *) LLNI_field_direct(object, uncaughtExceptionHandler);
+# endif
+
+ if (handler != NULL) {
+ LLNI_class_get(handler, c);
+ o = (java_handle_t *) handler;
+ }
+ else {
+ LLNI_class_get(group, c);
+ o = (java_handle_t *) group;
}
- }
-}
-static void wakeWaiters(monitorLockRecord *lr)
-{
- monitorLockRecord *tmplr;
- s4 q;
+ m = class_resolveclassmethod(c,
+ utf_uncaughtException,
+ utf_java_lang_Thread_java_lang_Throwable__V,
+ NULL,
+ true);
- /* assign lock record to a temporary variable */
+ if (m == NULL)
+ return false;
- tmplr = lr;
+ (void) vm_call_method(m, o, object, e);
- do {
- q = tmplr->queuers;
+ if (exceptions_get_exception())
+ return false;
+ }
- while (q--)
- threads_sem_post(&tmplr->queueSem);
+ /* XXX TWISTI: should all threads be in a ThreadGroup? */
- tmplr = tmplr->waiter;
- } while (tmplr != NULL && tmplr != lr);
-}
+ /* Remove thread from the thread group. */
-#define GRAB_LR(lr,t) \
- if (lr->ownerThread != t) { \
- lr = lr->incharge; \
- }
+ if (group != NULL) {
+ LLNI_class_get(group, c);
-#define CHECK_MONITORSTATE(lr,t,mo,a) \
- if (lr->o != mo || lr->ownerThread != t) { \
- *exceptionptr = new_illegalmonitorstateexception(); \
- a; \
- }
+# 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
-bool monitorExit(threadobject *t, java_objectheader *o)
-{
- monitorLockRecord *lr = o->monitorPtr;
- GRAB_LR(lr, t);
- CHECK_MONITORSTATE(lr, t, o, return false);
-
- if (lr->lockCount > 1) {
- /* we had locked this one recursively. just decrement, it will */
- /* still be locked. */
- lr->lockCount--;
- return true;
+ if (m == NULL)
+ return false;
+
+ o = (java_handle_t *) group;
+
+ (void) vm_call_method(m, o, object);
+
+ if (exceptions_get_exception())
+ return 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;
- nlr->waiter = wlr;
- STORE_ORDER_BARRIER();
- }
- else {
- wakeWaiters(wlr);
- }
- lr->waiter = NULL;
+#endif
+
+ /* thread is terminated */
+
+ threads_thread_state_terminated(t);
+
+#if !defined(NDEBUG)
+ if (opt_verbosethreads) {
+ printf("[Detaching thread ");
+ threads_thread_print_info(t);
+ printf("]\n");
}
+#endif
+
+ /* Enter the join-mutex before calling threads_thread_free, so
+ threads_join_all_threads gets the correct number of non-daemon
+ threads. */
+
+ threads_mutex_join_lock();
+
+ /* free the vm internal thread object */
+
+ threads_thread_free(t);
+
+ /* Signal that this thread has finished and leave the mutex. */
+
+ pthread_cond_signal(&cond_join);
+ threads_mutex_join_unlock();
- /* unlock and throw away this lock record */
- freeLockRecord(lr);
- recycleLockRecord(t, lr);
return true;
}
-static void removeFromWaiters(monitorLockRecord *lr, monitorLockRecord *wlr)
+
+/* threads_join_all_threads ****************************************************
+
+ Join all non-daemon threads.
+
+*******************************************************************************/
+
+void threads_join_all_threads(void)
{
- do {
- if (lr->waiter == wlr) {
- lr->waiter = wlr->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();
}
-static inline bool timespec_less(const struct timespec *tv1, const struct timespec *tv2)
+
+/* threads_timespec_earlier ****************************************************
+
+ Return true if timespec tv1 is earlier than timespec tv2.
+
+ IN:
+ tv1..........first timespec
+ tv2..........second timespec
+
+ RETURN VALUE:
+ true, if the first timespec is earlier
+
+*******************************************************************************/
+
+static inline bool threads_timespec_earlier(const struct timespec *tv1,
+ const struct timespec *tv2)
{
- return tv1->tv_sec < tv2->tv_sec || (tv1->tv_sec == tv2->tv_sec && tv1->tv_nsec < tv2->tv_nsec);
+ return (tv1->tv_sec < tv2->tv_sec)
+ ||
+ (tv1->tv_sec == tv2->tv_sec && tv1->tv_nsec < tv2->tv_nsec);
}
-static bool timeIsEarlier(const struct timespec *tv)
+
+/* threads_current_time_is_earlier_than ****************************************
+
+ Check if the current time is earlier than the given timespec.
+
+ IN:
+ tv...........the timespec to compare against
+
+ RETURN VALUE:
+ true, if the current time is earlier
+
+*******************************************************************************/
+
+static bool threads_current_time_is_earlier_than(const struct timespec *tv)
{
struct timeval tvnow;
struct timespec tsnow;
- gettimeofday(&tvnow, NULL);
+
+ /* get current time */
+
+ if (gettimeofday(&tvnow, NULL) != 0)
+ vm_abort("gettimeofday failed: %s\n", strerror(errno));
+
+ /* convert it to a timespec */
+
tsnow.tv_sec = tvnow.tv_sec;
tsnow.tv_nsec = tvnow.tv_usec * 1000;
- return timespec_less(&tsnow, tv);
+
+ /* compare current time with the given timespec */
+
+ return threads_timespec_earlier(&tsnow, tv);
}
-/* waitWithTimeout *************************************************************
+/* threads_wait_with_timeout ***************************************************
+
+ Wait until the given point in time on a monitor until either
+ we are notified, we are interrupted, or the time is up.
+
+ IN:
+ t............the current thread
+ wakeupTime...absolute (latest) wakeup time
+ If both tv_sec and tv_nsec are zero, this function
+ waits for an unlimited amount of time.
- XXX
+ RETURN VALUE:
+ true.........if the wait has been interrupted,
+ false........if the wait was ended by notification or timeout
*******************************************************************************/
-static bool waitWithTimeout(threadobject *t, monitorLockRecord *lr, struct timespec *wakeupTime)
+static bool threads_wait_with_timeout(threadobject *thread,
+ struct timespec *wakeupTime)
{
bool wasinterrupted;
- pthread_mutex_lock(&t->waitLock);
+ /* acquire the waitmutex */
- t->isSleeping = true;
+ pthread_mutex_lock(&thread->waitmutex);
+
+ /* mark us as sleeping */
+
+ thread->sleeping = true;
+
+ /* wait on waitcond */
if (wakeupTime->tv_sec || wakeupTime->tv_nsec) {
- while (!t->interrupted && !t->signaled && timeIsEarlier(wakeupTime))
- pthread_cond_timedwait(&t->waitCond, &t->waitLock, wakeupTime);
+ /* with timeout */
+ while (!thread->interrupted && !thread->signaled
+ && threads_current_time_is_earlier_than(wakeupTime))
+ {
+ threads_thread_state_timed_waiting(thread);
+
+ pthread_cond_timedwait(&thread->waitcond, &thread->waitmutex,
+ wakeupTime);
+
+ threads_thread_state_runnable(thread);
+ }
}
else {
- while (!t->interrupted && !t->signaled)
- pthread_cond_wait(&t->waitCond, &t->waitLock);
+ /* no timeout */
+ while (!thread->interrupted && !thread->signaled) {
+ threads_thread_state_waiting(thread);
+
+ pthread_cond_wait(&thread->waitcond, &thread->waitmutex);
+
+ threads_thread_state_runnable(thread);
+ }
}
- wasinterrupted = t->interrupted;
- t->interrupted = false;
- t->signaled = false;
- t->isSleeping = false;
+ /* check if we were interrupted */
+
+ wasinterrupted = thread->interrupted;
+
+ /* reset all flags */
+
+ thread->interrupted = false;
+ thread->signaled = false;
+ thread->sleeping = false;
- pthread_mutex_unlock(&t->waitLock);
+ /* release the waitmutex */
+
+ pthread_mutex_unlock(&thread->waitmutex);
return wasinterrupted;
}
-static void calcAbsoluteTime(struct timespec *tm, s8 millis, s4 nanos)
+/* threads_wait_with_timeout_relative ******************************************
+
+ 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
+ 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
+
+*******************************************************************************/
+
+bool threads_wait_with_timeout_relative(threadobject *thread, s8 millis,
+ s4 nanos)
+{
+ struct timespec wakeupTime;
+
+ /* calculate the the (latest) wakeup time */
+
+ threads_calc_absolute_time(&wakeupTime, millis, nanos);
+
+ /* wait */
+
+ return threads_wait_with_timeout(thread, &wakeupTime);
+}
+
+
+/* threads_calc_absolute_time **************************************************
+
+ Calculate the absolute point in time a given number of ms and ns from now.
+
+ IN:
+ millis............milliseconds from now
+ nanos.............nanoseconds from now
+
+ OUT:
+ *tm...............receives the timespec of the absolute point in time
+
+*******************************************************************************/
+
+static void threads_calc_absolute_time(struct timespec *tm, s8 millis, s4 nanos)
{
- if (millis || nanos) {
+ if ((millis != 0x7fffffffffffffffLLU) && (millis || nanos)) {
struct timeval tv;
long nsec;
gettimeofday(&tv, NULL);
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;
}
}
-void monitorWait(threadobject *t, java_objectheader *o, s8 millis, s4 nanos)
-{
- bool wasinterrupted;
- struct timespec wakeupTime;
- monitorLockRecord *mlr, *lr = o->monitorPtr;
- GRAB_LR(lr, t);
- CHECK_MONITORSTATE(lr, t, o, return);
-
- calcAbsoluteTime(&wakeupTime, millis, nanos);
-
- if (lr->waiter)
- wakeWaiters(lr->waiter);
- lr->waiting = o;
- STORE_ORDER_BARRIER();
- freeLockRecord(lr);
- wasinterrupted = waitWithTimeout(t, lr, &wakeupTime);
- mlr = monitorEnter(t, o);
- removeFromWaiters(mlr, lr);
- mlr->lockCount = lr->lockCount;
- lr->lockCount = 1;
- lr->waiting = NULL;
- lr->waiter = NULL;
- recycleLockRecord(t, lr);
-
- if (wasinterrupted)
- *exceptionptr = new_exception(string_java_lang_InterruptedException);
-}
-static void notifyOneOrAll(threadobject *t, java_objectheader *o, bool one)
-{
- monitorLockRecord *lr = o->monitorPtr;
- GRAB_LR(lr, t);
- CHECK_MONITORSTATE(lr, t, o, return);
- do {
- threadobject *wthread;
- monitorLockRecord *wlr = lr->waiter;
- if (!wlr)
- break;
- wthread = wlr->ownerThread;
- pthread_mutex_lock(&wthread->waitLock);
- if (wthread->isSleeping)
- pthread_cond_signal(&wthread->waitCond);
- wthread->signaled = true;
- pthread_mutex_unlock(&wthread->waitLock);
- lr = wlr;
- } while (!one);
-}
+/* threads_thread_interrupt ****************************************************
-bool threadHoldsLock(threadobject *t, java_objectheader *o)
-{
- monitorLockRecord *lr = o->monitorPtr;
- GRAB_LR(lr, t);
- /* The reason why we have to check against NULL is that
- * dummyLR->incharge == NULL */
- return lr->o == o && lr->ownerThread == t;
-}
+ Interrupt the given thread.
-void interruptThread(java_lang_VMThread *thread)
-{
- threadobject *t = (threadobject*) thread;
+ The thread gets the "waitcond" signal and
+ its interrupted flag is set to true.
- pthread_mutex_lock(&t->waitLock);
- if (t->isSleeping)
- pthread_cond_signal(&t->waitCond);
- t->interrupted = true;
- pthread_mutex_unlock(&t->waitLock);
-}
+ IN:
+ thread............the thread to interrupt
-bool interruptedThread()
-{
- threadobject *t = (threadobject*) THREADOBJECT;
- bool intr = t->interrupted;
- t->interrupted = false;
- return intr;
-}
+*******************************************************************************/
-bool isInterruptedThread(java_lang_VMThread *thread)
+void threads_thread_interrupt(threadobject *thread)
{
- threadobject *t = (threadobject*) thread;
- return t->interrupted;
-}
+ /* Signal the thread a "waitcond" and tell it that it has been
+ interrupted. */
+ pthread_mutex_lock(&thread->waitmutex);
-/* thread_sleep ****************************************************************
+ /* Interrupt blocking system call using a signal. */
- Sleep the current thread for the specified amount of time.
+ pthread_kill(thread->tid, SIGHUP);
-*******************************************************************************/
+ if (thread->sleeping)
+ pthread_cond_signal(&thread->waitcond);
-void thread_sleep(s8 millis, s4 nanos)
-{
- threadobject *t;
- struct timespec wakeupTime;
- monitorLockRecord *lr;
- bool wasinterrupted;
+ thread->interrupted = true;
- t = (threadobject *) THREADOBJECT;
+ pthread_mutex_unlock(&thread->waitmutex);
+}
- calcAbsoluteTime(&wakeupTime, millis, nanos);
- lr = allocLockRecordSimple(t);
+/* threads_check_if_interrupted_and_reset **************************************
- wasinterrupted = waitWithTimeout(t, lr, &wakeupTime);
+ Check if the current thread has been interrupted and reset the
+ interruption flag.
- recycleLockRecord(t, lr);
+ RETURN VALUE:
+ true, if the current thread had been interrupted
- if (wasinterrupted)
- *exceptionptr = new_exception(string_java_lang_InterruptedException);
-}
+*******************************************************************************/
-void yieldThread()
+bool threads_check_if_interrupted_and_reset(void)
{
- sched_yield();
-}
+ threadobject *thread;
+ bool intr;
-void setPriorityThread(thread *t, s4 priority)
-{
- nativethread *info = &((threadobject*) t->vmThread)->info;
- setPriority(info->tid, priority);
-}
+ thread = THREADOBJECT;
-void wait_cond_for_object(java_objectheader *o, s8 millis, s4 nanos)
-{
- threadobject *t = (threadobject*) THREADOBJECT;
- monitorWait(t, o, millis, nanos);
-}
+ /* get interrupted flag */
-void signal_cond_for_object(java_objectheader *o)
-{
- threadobject *t = (threadobject*) THREADOBJECT;
- notifyOneOrAll(t, o, true);
-}
+ intr = thread->interrupted;
-void broadcast_cond_for_object(java_objectheader *o)
-{
- threadobject *t = (threadobject*) THREADOBJECT;
- notifyOneOrAll(t, o, false);
+ /* reset interrupted flag */
+
+ thread->interrupted = false;
+
+ return intr;
}
-/* threads_dump ****************************************************************
+/* threads_thread_has_been_interrupted *****************************************
- Dumps info for all threads running in the JVM. This function is
- called when SIGQUIT (<ctrl>-\) is sent to CACAO.
+ Check if the given thread has been interrupted
-*******************************************************************************/
+ IN:
+ t............the thread to check
-void threads_dump(void)
-{
- threadobject *tobj;
- java_lang_VMThread *vmt;
- nativethread *nt;
- java_lang_Thread *t;
- utf *name;
+ RETURN VALUE:
+ true, if the given thread had been interrupted
- tobj = mainthreadobj;
+*******************************************************************************/
- printf("Full thread dump CACAO "VERSION":\n");
+bool threads_thread_has_been_interrupted(threadobject *thread)
+{
+ return thread->interrupted;
+}
- /* iterate over all started threads */
- do {
- /* get thread objects */
+/* threads_sleep ***************************************************************
- vmt = &tobj->o;
- nt = &tobj->info;
- t = vmt->thread;
+ Sleep the current thread for the specified amount of time.
- /* the thread may be currently in initalization, don't print it */
+*******************************************************************************/
- if (t) {
- /* get thread name */
+void threads_sleep(s8 millis, s4 nanos)
+{
+ threadobject *thread;
+ struct timespec wakeupTime;
+ bool wasinterrupted;
- name = javastring_toutf(t->name, false);
+ thread = THREADOBJECT;
- printf("\n\"");
- utf_display(name);
- printf("\" ");
+ threads_calc_absolute_time(&wakeupTime, millis, nanos);
- if (t->daemon)
- printf("daemon ");
+ wasinterrupted = threads_wait_with_timeout(thread, &wakeupTime);
-#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
+ if (wasinterrupted)
+ exceptions_throw_interruptedexception();
+}
- /* send SIGUSR1 to thread to print stacktrace */
- pthread_kill(nt->tid, SIGUSR1);
+/* threads_yield ***************************************************************
- /* sleep this thread a bit, so the signal can reach the thread */
+ Yield to the scheduler.
- thread_sleep(10, 0);
- }
+*******************************************************************************/
- tobj = tobj->info.next;
- } while (tobj && (tobj != mainthreadobj));
+void threads_yield(void)
+{
+ sched_yield();
}
projects / cacao.git / blobdiff