/* src/threads/threads-common.c - machine independent thread functions
- Copyright (C) 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
+ Copyright (C) 2007, 2008
+ CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
This file is part of CACAO.
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- $Id: threads-common.c 7893 2007-05-10 13:27:29Z twisti $
-
*/
#include "config.h"
#include <assert.h>
+#include <stdint.h>
+#include <unistd.h>
#include "vm/types.h"
+#include "mm/memory.h"
+
#include "native/jni.h"
+#include "native/llni.h"
#include "native/include/java_lang_Object.h"
#include "native/include/java_lang_String.h"
#include "native/include/java_lang_Thread.h"
#if defined(WITH_CLASSPATH_GNU)
+# include "native/include/java_lang_Throwable.h"
# include "native/include/java_lang_VMThread.h"
#endif
#include "threads/critical.h"
#include "threads/lock-common.h"
+#include "threads/threadlist.h"
#include "threads/threads-common.h"
+#include "toolbox/list.h"
+
#include "vm/builtin.h"
#include "vm/stringlocal.h"
#include "vm/vm.h"
#include "vm/jit/stacktrace.h"
#include "vmcore/class.h"
+#include "vmcore/options.h"
#if defined(ENABLE_STATISTICS)
-# include "vmcore/options.h"
# include "vmcore/statistics.h"
#endif
/* global variables ***********************************************************/
-/* global threads table */
-static threads_table_t threads_table;
-
-
-/* prototypes *****************************************************************/
-
-static void threads_table_init(threadobject *mainthread);
+#if defined(__LINUX__)
+/* XXX Remove for exact-GC. */
+bool threads_pthreads_implementation_nptl;
+#endif
/* threads_preinit *************************************************************
Do some early initialization of stuff required.
- ATTENTION: Do NOT use any Java heap allocation here, as gc_init()
- is called AFTER this function!
-
*******************************************************************************/
void threads_preinit(void)
{
threadobject *mainthread;
+#if defined(__LINUX__) && defined(_CS_GNU_LIBPTHREAD_VERSION)
+ char *pathbuf;
+ size_t len;
+#endif
+
+ TRACESUBSYSTEMINITIALIZATION("threads_preinit");
+
+#if defined(__LINUX__)
+ /* XXX Remove for exact-GC. */
+
+ /* On Linux we need to check the pthread implementation. */
+
+ /* _CS_GNU_LIBPTHREAD_VERSION (GNU C library only; since glibc 2.3.2) */
+ /* If the glibc is a pre-2.3.2 version, we fall back to
+ linuxthreads. */
+
+# if defined(_CS_GNU_LIBPTHREAD_VERSION)
+ len = confstr(_CS_GNU_LIBPTHREAD_VERSION, NULL, (size_t) 0);
+
+ /* Some systems return as length 0 (maybe cross-compilation
+ related). In this case we also fall back to linuxthreads. */
+
+ if (len > 0) {
+ pathbuf = MNEW(char, len);
+
+ (void) confstr(_CS_GNU_LIBPTHREAD_VERSION, pathbuf, len);
+
+ if (strstr(pathbuf, "NPTL") != NULL)
+ threads_pthreads_implementation_nptl = true;
+ else
+ threads_pthreads_implementation_nptl = false;
+ }
+ else
+ threads_pthreads_implementation_nptl = false;
+# else
+ threads_pthreads_implementation_nptl = false;
+# endif
+#endif
/* Initialize the threads implementation (sets the thinlock on the
main thread). */
/* create internal thread data-structure for the main thread */
- mainthread = threads_create_thread();
-
- mainthread->object = NULL;
- mainthread->index = 1;
- mainthread->thinlock = lock_pre_compute_thinlock(mainthread->index);
+ mainthread = threads_thread_new();
/* thread is a Java thread and running */
- mainthread->flags = THREAD_FLAG_JAVA;
+ mainthread->flags |= THREAD_FLAG_JAVA;
mainthread->state = THREAD_STATE_RUNNABLE;
/* store the internal thread data-structure in the TSD */
threads_set_current_threadobject(mainthread);
-
- /* initialize the threads table with the main-thread */
-
- threads_table_init(mainthread);
-
- /* initialize locking subsystems */
-
- lock_init();
-
- /* initialize the critical section */
-
- critical_init();
}
-/* threads_table_init **********************************************************
-
- Initialize the global threads table. We initialize the table with
- the main-thread, which has always the index 1.
+/* threads_thread_new **********************************************************
- IN:
- mainthread....the main-thread
+ Allocates and initializes an internal thread data-structure and
+ adds it to the threads list.
*******************************************************************************/
-#define THREADS_INITIAL_TABLE_SIZE 8
-
-static void threads_table_init(threadobject *mainthread)
+threadobject *threads_thread_new(void)
{
- threads_table_entry_t *ttemain;
- s4 size;
- s4 i;
-
- /* initialize the threads table lock */
-
- threads_impl_table_init();
-
- /* initialize the table */
-
- size = THREADS_INITIAL_TABLE_SIZE;
-
- threads_table.table = MNEW(threads_table_entry_t, size);
- threads_table.size = size;
- threads_table.used = 0;
- threads_table.daemons = 0;
-
- /* Link the entries in a freelist. Skip 2 entries: 0 is the
- free-list header and 1 is the main thread. */
-
- for (i = 2; i < size; i++) {
- threads_table.table[i].thread = NULL;
- threads_table.table[i].next = i + 1;
- }
-
- threads_table.table[0].next = 2;
-
- /* terminate the freelist */
-
- threads_table.table[size - 1].next = 0; /* index 0 is never free */
-
- /* insert the main-thread */
-
- ttemain = &(threads_table.table[1]);
-
- ttemain->thread = mainthread;
- ttemain->next = 0;
+ int32_t index;
+ threadobject *t;
+
+ /* lock the threads-lists */
- /* now 1 entry is used */
+ threads_list_lock();
- threads_table.used = 1;
-}
+ index = threadlist_get_free_index();
+ /* Allocate a thread data structure. */
-/* threads_table_add ***********************************************************
+ /* First, try to get one from the free-list. */
- Add a thread to the global threads table. The index is entered in the
- threadobject. The thinlock value for the thread is pre-computed.
+ t = threadlist_free_first();
- IN:
- thread............the thread to add
+ if (t != NULL) {
+ /* Remove from free list. */
- RETURN VALUE:
- The table index for the newly added thread. This value has also been
- entered in the threadobject.
+ threadlist_free_remove(t);
-*******************************************************************************/
+ /* Equivalent of MZERO on the else path */
-s4 threads_table_add(threadobject *thread)
-{
- threads_table_entry_t *ttefree;
- threads_table_entry_t *ttemain;
- threads_table_entry_t *tte;
- s4 index;
- s4 oldsize;
- s4 newsize;
- s4 i;
-
- /* lock the threads table */
-
- threads_table_lock();
+ threads_impl_thread_clear(t);
+ }
+ else {
+#if defined(ENABLE_GC_BOEHM)
+ t = GCNEW_UNCOLLECTABLE(threadobject, 1);
+#else
+ t = NEW(threadobject);
+#endif
- /* get free and main entry */
+#if defined(ENABLE_STATISTICS)
+ if (opt_stat)
+ size_threadobject += sizeof(threadobject);
+#endif
- ttefree = &(threads_table.table[0]);
- ttemain = &(threads_table.table[1]);
+ /* Clear memory. */
- /* get the next free index */
+ MZERO(t, threadobject, 1);
- index = ttefree->next;
+#if defined(ENABLE_GC_CACAO)
+ /* Register reference to java.lang.Thread with the GC. */
+ /* FIXME is it ok to do this only once? */
- /* no entry free anymore? resize the table */
+ gc_reference_register(&(t->object), GC_REFTYPE_THREADOBJECT);
+ gc_reference_register(&(t->_exceptionptr), GC_REFTYPE_THREADOBJECT);
+#endif
- if (index == 0) {
- /* we must grow the table */
+ /* Initialize the implementation-specific bits. */
- oldsize = threads_table.size;
- newsize = oldsize * 2;
+ threads_impl_thread_init(t);
+ }
- threads_table.table = MREALLOC(threads_table.table,
- threads_table_entry_t, oldsize, newsize);
- threads_table.size = newsize;
+ /* Pre-compute the thinlock-word. */
- /* the addresses have changed, get them again */
+ assert(index != 0);
- ttefree = &(threads_table.table[0]);
- ttemain = &(threads_table.table[1]);
+ t->index = index;
+ t->thinlock = lock_pre_compute_thinlock(t->index);
+ t->flags = 0;
+ t->state = THREAD_STATE_NEW;
- /* link the new entries to a free list */
+#if defined(ENABLE_GC_CACAO)
+ t->flags |= THREAD_FLAG_IN_NATIVE;
+#endif
- for (i = oldsize; i < newsize; i++) {
- threads_table.table[i].thread = NULL;
- threads_table.table[i].next = i + 1;
- }
+ /* Initialize the implementation-specific bits. */
- ttefree->next = oldsize;
+ threads_impl_thread_reuse(t);
- /* terminate the freelist */
+ /* Add the thread to the thread list. */
- threads_table.table[newsize - 1].next = 0; /* index 0 is never free */
+ threadlist_add(t);
- /* use the first of the new entries */
+ /* Unlock the threads-lists. */
- index = ttefree->next;
- }
+ threads_list_unlock();
- /* get the entry with the assigned index */
+ return t;
+}
- tte = &(threads_table.table[index]);
- /* store the next free index into the free-list header */
+/* threads_thread_free *********************************************************
- ttefree->next = tte->next;
+ Remove the thread from the threads-list and free the internal
+ thread data structure. The thread index is added to the
+ thread-index free-list.
- /* store the thread in the table */
+ IN:
+ t....thread data structure
- tte->thread = thread;
+*******************************************************************************/
- /* link the new entry into the used-list */
+void threads_thread_free(threadobject *t)
+{
+ /* Lock the threads lists. */
- tte->next = ttemain->next;
- ttemain->next = index;
+ threads_list_lock();
- /* update the counters */
+ /* Remove the thread from the thread-list. */
- threads_table.used++;
+ threadlist_remove(t);
- if (thread->flags & THREAD_FLAG_DAEMON)
- threads_table.daemons++;
+ /* Add the thread index to the free list. */
- assert(threads_table.used < threads_table.size);
+ threadlist_index_add(t->index);
- /* set the thread variables */
+ /* Add the thread data structure to the free list. */
- thread->index = index;
- thread->thinlock = lock_pre_compute_thinlock(index);
+ threads_thread_set_object(t, NULL);
- /* unlock the threads table */
+ threadlist_free_add(t);
- threads_table_unlock();
+ /* Unlock the threads lists. */
- return index;
+ threads_list_unlock();
}
-/* threads_table_remove *******************************************************
+/* threads_thread_start_internal ***********************************************
- Remove a thread from the global threads table.
+ Start an internal thread in the JVM. No Java thread objects exists
+ so far.
IN:
- thread............the thread to remove
+ name.......UTF-8 name of the thread
+ f..........function pointer to C function to start
-******************************************************************************/
+*******************************************************************************/
-void threads_table_remove(threadobject *thread)
+bool threads_thread_start_internal(utf *name, functionptr f)
{
- threads_table_entry_t *ttefree;
- threads_table_entry_t *tte;
- s4 index;
- s4 i;
-
- /* lock the threads table */
-
- threads_table_lock();
-
- /* get the free entry */
-
- ttefree = &(threads_table.table[0]);
+ threadobject *t;
+ java_lang_Thread *object;
+#if defined(WITH_CLASSPATH_GNU)
+ java_lang_VMThread *vmt;
+#endif
- /* get the current entry */
+ /* Enter the join-mutex, so if the main-thread is currently
+ waiting to join all threads, the number of non-daemon threads
+ is correct. */
- index = thread->index;
- tte = &(threads_table.table[index]);
+ threads_mutex_join_lock();
- assert(tte->thread == thread);
+ /* create internal thread data-structure */
- /* Find the entry which has the one to be removed as next entry (I
- think it's better to do it at the removal in linear time than
- to have a list or to do it every time we iterate over all
- threads). */
+ t = threads_thread_new();
- for (i = 0; i < threads_table.size; i++) {
- if (threads_table.table[i].next == index) {
- threads_table.table[i].next = tte->next;
- break;
- }
- }
+ t->flags |= THREAD_FLAG_INTERNAL | THREAD_FLAG_DAEMON;
- /* clear the thread pointer in the entry */
+ /* The thread is flagged as (non-)daemon thread, we can leave the
+ mutex. */
- tte->thread = NULL;
+ threads_mutex_join_unlock();
- /* this entry is free now, add it to the free-list */
+ /* create the java thread object */
- tte->next = ttefree->next;
- ttefree->next = index;
+ object = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
- /* update the counters */
+ /* XXX memory leak!!! */
+ if (object == NULL)
+ return false;
- threads_table.used--;
+#if defined(WITH_CLASSPATH_GNU)
+ vmt = (java_lang_VMThread *) builtin_new(class_java_lang_VMThread);
- if (thread->flags & THREAD_FLAG_DAEMON)
- threads_table.daemons--;
+ /* XXX memory leak!!! */
+ if (vmt == NULL)
+ return false;
- assert(threads_table.used >= 0);
+ LLNI_field_set_ref(vmt, thread, object);
+ LLNI_field_set_val(vmt, vmdata, (java_lang_Object *) t);
- /* delete the index in the threadobject to discover bugs */
-#if !defined(NDEBUG)
- thread->index = 0;
+ LLNI_field_set_ref(object, vmThread, vmt);
+#elif defined(WITH_CLASSPATH_CLDC1_1)
+ LLNI_field_set_val(object, vm_thread, (java_lang_Object *) t);
#endif
- /* unlock the threads table */
-
- threads_table_unlock();
-}
-
-
-/* threads_table_get ***********************************************************
-
- Return the thread of the given table-entry index.
+ threads_thread_set_object(t, (java_handle_t *) object);
- NOTE: It is valid to pass and index of 0, as this entry is the
- free-list header where the thread pointer is always NULL and
- this is thre expected behavior.
+ /* set java.lang.Thread fields */
- NOTE: This function does not lock the table.
+#if defined(WITH_CLASSPATH_GNU)
+ LLNI_field_set_ref(object, name , (java_lang_String *) javastring_new(name));
+#elif defined(WITH_CLASSPATH_CLDC1_1)
+ /* FIXME: In cldc the name is a char[] */
+/* LLNI_field_set_ref(object, name , (java_chararray *) javastring_new(name)); */
+ LLNI_field_set_ref(object, name , NULL);
+#endif
-*******************************************************************************/
+#if defined(ENABLE_JAVASE)
+ LLNI_field_set_val(object, daemon , true);
+#endif
-static threadobject *threads_table_get(s4 index)
-{
- threadobject *thread;
+ LLNI_field_set_val(object, priority, NORM_PRIORITY);
- /* get the requested entry */
+ /* start the thread */
- assert((index >= 0) && (index < threads_table.size));
+ threads_impl_thread_start(t, f);
- thread = threads_table.table[index].thread;
+ /* everything's ok */
- return thread;
+ return true;
}
-/* threads_table_get_threads ***************************************************
+/* threads_thread_start ********************************************************
- Return the number of running threads.
+ Start a Java thread in the JVM. Only the java thread object exists
+ so far.
- NOTE: This function does not lock the table.
+ IN:
+ object.....the java thread object java.lang.Thread
*******************************************************************************/
-s4 threads_table_get_threads(void)
+void threads_thread_start(java_handle_t *object)
{
- return threads_table.used;
-}
-
-
-/* threads_table_get_non_daemons ***********************************************
-
- Return the number of non-daemon threads.
+ java_lang_Thread *o;
+ threadobject *thread;
+#if defined(WITH_CLASSPATH_GNU)
+ java_lang_VMThread *vmt;
+#endif
-*******************************************************************************/
+ o = (java_lang_Thread *) object;
-s4 threads_table_get_non_daemons(void)
-{
- s4 nondaemons;
+ /* Enter the join-mutex, so if the main-thread is currently
+ waiting to join all threads, the number of non-daemon threads
+ is correct. */
- /* lock the threads table */
+ threads_mutex_join_lock();
- threads_table_lock();
+ /* create internal thread data-structure */
- nondaemons = threads_table.used - threads_table.daemons;
+ thread = threads_thread_new();
- /* unlock the threads table */
+ /* this is a normal Java thread */
- threads_table_unlock();
+ thread->flags |= THREAD_FLAG_JAVA;
- return nondaemons;
-}
+#if defined(ENABLE_JAVASE)
+ /* is this a daemon thread? */
+ if (LLNI_field_direct(o, daemon) == true)
+ thread->flags |= THREAD_FLAG_DAEMON;
+#endif
-/* threads_table_first *********************************************************
+ /* The thread is flagged and (non-)daemon thread, we can leave the
+ mutex. */
- Return the first thread of the threads table.
+ threads_mutex_join_unlock();
- NOTE: This is always the entry with index 1 and must be the main
- thread.
+ /* link the two objects together */
- NOTE: This function does not lock the table.
+ threads_thread_set_object(thread, object);
-*******************************************************************************/
+#if defined(WITH_CLASSPATH_GNU)
+ LLNI_field_get_ref(o, vmThread, vmt);
-threadobject *threads_table_first(void)
-{
- threadobject *thread;
+ assert(vmt);
+ assert(LLNI_field_direct(vmt, vmdata) == NULL);
- /* get the requested entry */
+ LLNI_field_set_val(vmt, vmdata, (java_lang_Object *) thread);
+#elif defined(WITH_CLASSPATH_CLDC1_1)
+ LLNI_field_set_val(o, vm_thread, (java_lang_Object *) thread);
+#endif
- thread = threads_table_get(1);
+ /* Start the thread. Don't pass a function pointer (NULL) since
+ we want Thread.run()V here. */
- return thread;
+ threads_impl_thread_start(thread, NULL);
}
-/* threads_table_next **********************************************************
-
- Return the next thread of the threads table relative to the passed
- one.
-
- NOTE: This function does not lock the table.
+/* threads_thread_print_info ***************************************************
+ Print information of the passed thread.
+
*******************************************************************************/
-threadobject *threads_table_next(threadobject *thread)
+void threads_thread_print_info(threadobject *t)
{
- threads_table_entry_t *tte;
- threadobject *next;
- s4 index;
-
- index = thread->index;
-
- /* get the passed entry */
-
- assert((index > 0) && (index < threads_table.size));
-
- tte = &(threads_table.table[index]);
-
- /* get the requested entry */
+ java_lang_Thread *object;
+#if defined(WITH_CLASSPATH_GNU)
+ java_lang_String *namestring;
+#endif
+ utf *name;
- next = threads_table_get(tte->next);
+ assert(t->state != THREAD_STATE_NEW);
- return next;
-}
+ /* the thread may be currently in initalization, don't print it */
+ object = (java_lang_Thread *) threads_thread_get_object(t);
-/* threads_table_dump *********************************************************
+ if (object != NULL) {
+ /* get thread name */
- Dump the threads table for debugging purposes.
+#if defined(WITH_CLASSPATH_GNU)
+ LLNI_field_get_ref(object, name, namestring);
+ name = javastring_toutf((java_handle_t *) namestring, false);
+#elif defined(WITH_CLASSPATH_SUN) || defined(WITH_CLASSPATH_CLDC1_1)
+ /* FIXME: In cldc the name is a char[] */
+/* name = object->name; */
+ name = utf_null;
+#else
+# error unknown classpath configuration
+#endif
-******************************************************************************/
+ printf("\"");
+ utf_display_printable_ascii(name);
+ printf("\"");
-#if !defined(NDEBUG)
-void threads_table_dump(void)
-{
- s4 i;
- s4 size;
- ptrint index;
+ if (t->flags & THREAD_FLAG_DAEMON)
+ printf(" daemon");
- size = threads_table.size;
+ printf(" prio=%d", LLNI_field_direct(object, priority));
- log_println("threads table ==========");
+#if SIZEOF_VOID_P == 8
+ printf(" t=0x%016lx tid=0x%016lx (%ld)",
+ (ptrint) t, (ptrint) t->tid, (ptrint) t->tid);
+#else
+ printf(" t=0x%08x tid=0x%08x (%d)",
+ (ptrint) t, (ptrint) t->tid, (ptrint) t->tid);
+#endif
- log_println("size: %d", size);
- log_println("used: %d", threads_table.used);
- log_println("daemons: %d", threads_table.daemons);
+ printf(" index=%d", t->index);
- for (i = 0; i < size; i++) {
- index = threads_table.table[i].next;
+ /* print thread state */
- if (threads_table.table[i].thread != NULL)
- log_println("%4d: thread=0x%08x, next=%d", i,
- threads_table.table[i].thread->tid, (int) index);
- else
- log_println("%4d: free, next=%d", i, (int) index);
+ switch (t->state) {
+ case THREAD_STATE_NEW:
+ printf(" new");
+ break;
+ case THREAD_STATE_RUNNABLE:
+ printf(" runnable");
+ break;
+ case THREAD_STATE_BLOCKED:
+ printf(" blocked");
+ break;
+ case THREAD_STATE_WAITING:
+ printf(" waiting");
+ break;
+ case THREAD_STATE_TIMED_WAITING:
+ printf(" waiting on condition");
+ break;
+ case THREAD_STATE_TERMINATED:
+ printf(" terminated");
+ break;
+ default:
+ vm_abort("threads_thread_print_info: unknown thread state %d",
+ t->state);
+ }
}
-
- log_println("end of threads table ==========");
}
-#endif
-/* threads_create_thread *******************************************************
+/* threads_get_current_tid *****************************************************
- Creates and initializes an internal thread data-structure.
+ Return the tid of the current thread.
+
+ RETURN VALUE:
+ the current tid
*******************************************************************************/
-threadobject *threads_create_thread(void)
+ptrint threads_get_current_tid(void)
{
threadobject *thread;
- /* allocate internal thread data-structure */
-
-#if defined(ENABLE_GC_BOEHM)
- thread = GCNEW_UNCOLLECTABLE(threadobject, 1);
-#else
- thread = NEW(threadobject);
-#endif
-
-#if defined(ENABLE_STATISTICS)
- if (opt_stat)
- size_threadobject += sizeof(threadobject);
-#endif
+ thread = THREADOBJECT;
- /* initialize thread data structure */
+ /* this may happen during bootstrap */
- threads_init_threadobject(thread);
- lock_init_execution_env(thread);
+ if (thread == NULL)
+ return 0;
- return thread;
+ return (ptrint) thread->tid;
}
-/* threads_thread_start_internal ***********************************************
+/* threads_get_current_object **************************************************
- Start an internal thread in the JVM. No Java thread objects exists
- so far.
-
- IN:
- name.......UTF-8 name of the thread
- f..........function pointer to C function to start
+ Return the Java object of the current thread.
+
+ RETURN VALUE:
+ the Java object
*******************************************************************************/
-bool threads_thread_start_internal(utf *name, functionptr f)
+#include "native/include/java_lang_ThreadGroup.h"
+
+java_object_t *threads_get_current_object(void)
{
- threadobject *thread;
- java_lang_Thread *t;
-#if defined(WITH_CLASSPATH_GNU)
- java_lang_VMThread *vmt;
+#if defined(ENABLE_THREADS)
+ threadobject *t;
+# if defined(ENABLE_JAVASE)
+ java_lang_ThreadGroup *group;
+# endif
#endif
+ java_lang_Thread *o;
- /* create internal thread data-structure */
-
- thread = threads_create_thread();
+#if defined(ENABLE_THREADS)
+ t = THREADOBJECT;
+ o = threads_thread_get_object(t);
- /* create the java thread object */
+# if defined(ENABLE_JAVASE)
+ /* TODO Do we really need this code? Or should we check, when we
+ create the threads, that all of them have a group? */
+ /* TWISTI No, we don't need this code! We need to allocate a
+ ThreadGroup before we initialize the main thread. */
- t = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
+ LLNI_field_get_ref(o, group, group);
- if (t == NULL)
- return false;
+ if (group == NULL) {
+ /* ThreadGroup of currentThread is not initialized */
-#if defined(WITH_CLASSPATH_GNU)
- vmt = (java_lang_VMThread *) builtin_new(class_java_lang_VMThread);
+ group = (java_lang_ThreadGroup *)
+ native_new_and_init(class_java_lang_ThreadGroup);
- if (vmt == NULL)
- return false;
+ if (group == NULL)
+ vm_abort("unable to create ThreadGroup");
- vmt->thread = t;
- vmt->vmdata = (java_lang_Object *) thread;
+ LLNI_field_set_ref(o, group, group);
+ }
+# endif
+#else
+ /* We just return a fake java.lang.Thread object, otherwise we get
+ NullPointerException's in GNU Classpath. */
- t->vmThread = vmt;
-#elif defined(WITH_CLASSPATH_CLDC1_1)
- t->vm_thread = (java_lang_Object *) thread;
+ o = builtin_new(class_java_lang_Thread);
#endif
- thread->object = t;
+ return o;
+}
- thread->flags = THREAD_FLAG_INTERNAL | THREAD_FLAG_DAEMON;
- /* set java.lang.Thread fields */
+/* threads_thread_state_runnable ***********************************************
- t->name = (java_lang_String *) javastring_new(name);
-#if defined(ENABLE_JAVASE)
- t->daemon = true;
-#endif
- t->priority = NORM_PRIORITY;
+ Set the current state of the given thread to THREAD_STATE_RUNNABLE.
- /* start the thread */
+ NOTE: If the thread has already terminated, don't set the state.
+ This is important for threads_detach_thread.
- threads_impl_thread_start(thread, f);
+*******************************************************************************/
- /* everything's ok */
+void threads_thread_state_runnable(threadobject *t)
+{
+ /* Set the state inside a lock. */
- return true;
+ threads_list_lock();
+
+ if (t->state != THREAD_STATE_TERMINATED)
+ t->state = THREAD_STATE_RUNNABLE;
+
+ DEBUGTHREADS("is RUNNABLE", t);
+
+ threads_list_unlock();
}
-/* threads_thread_start ********************************************************
+/* threads_thread_state_waiting ************************************************
- Start a Java thread in the JVM. Only the java thread object exists
- so far.
+ Set the current state of the given thread to THREAD_STATE_WAITING.
- IN:
- object.....the java thread object java.lang.Thread
+ NOTE: If the thread has already terminated, don't set the state.
+ This is important for threads_detach_thread.
*******************************************************************************/
-void threads_thread_start(java_lang_Thread *object)
+void threads_thread_state_waiting(threadobject *t)
{
- threadobject *thread;
+ /* Set the state inside a lock. */
- /* create internal thread data-structure */
+ threads_list_lock();
- thread = threads_create_thread();
+ if (t->state != THREAD_STATE_TERMINATED)
+ t->state = THREAD_STATE_WAITING;
- /* link the two objects together */
+ DEBUGTHREADS("is WAITING", t);
- thread->object = object;
+ threads_list_unlock();
+}
- /* this is a normal Java thread */
- thread->flags = THREAD_FLAG_JAVA;
+/* threads_thread_state_timed_waiting ******************************************
-#if defined(ENABLE_JAVASE)
- /* is this a daemon thread? */
+ Set the current state of the given thread to
+ THREAD_STATE_TIMED_WAITING.
- if (object->daemon == true)
- thread->flags |= THREAD_FLAG_DAEMON;
-#endif
+ NOTE: If the thread has already terminated, don't set the state.
+ This is important for threads_detach_thread.
-#if defined(WITH_CLASSPATH_GNU)
- assert(object->vmThread);
- assert(object->vmThread->vmdata == NULL);
+*******************************************************************************/
- object->vmThread->vmdata = (java_lang_Object *) thread;
-#elif defined(WITH_CLASSPATH_CLDC1_1)
- object->vm_thread = (java_lang_Object *) thread;
-#endif
+void threads_thread_state_timed_waiting(threadobject *t)
+{
+ /* Set the state inside a lock. */
- /* Start the thread. Don't pass a function pointer (NULL) since
- we want Thread.run()V here. */
+ threads_list_lock();
- threads_impl_thread_start(thread, NULL);
+ if (t->state != THREAD_STATE_TERMINATED)
+ t->state = THREAD_STATE_TIMED_WAITING;
+
+ DEBUGTHREADS("is TIMED_WAITING", t);
+
+ threads_list_unlock();
}
-/* threads_get_current_tid *****************************************************
+/* threads_thread_state_terminated *********************************************
- Return the tid of the current thread.
-
- RETURN VALUE:
- the current tid
+ Set the current state of the given thread to
+ THREAD_STATE_TERMINATED.
*******************************************************************************/
-ptrint threads_get_current_tid(void)
+void threads_thread_state_terminated(threadobject *t)
{
- threadobject *thread;
+ /* set the state in the lock */
- thread = THREADOBJECT;
+ threads_list_lock();
- /* this may happen during bootstrap */
+ t->state = THREAD_STATE_TERMINATED;
- if (thread == NULL)
- return 0;
+ DEBUGTHREADS("is TERMINATED", t);
- return (ptrint) thread->tid;
+ threads_list_unlock();
}
*******************************************************************************/
-utf *threads_thread_get_state(threadobject *thread)
+utf *threads_thread_get_state(threadobject *t)
{
utf *u;
- switch (thread->state) {
+ switch (t->state) {
case THREAD_STATE_NEW:
u = utf_new_char("NEW");
break;
u = utf_new_char("TERMINATED");
break;
default:
- vm_abort("threads_get_state: unknown thread state %d", thread->state);
+ vm_abort("threads_get_state: unknown thread state %d", t->state);
+
+ /* keep compiler happy */
+
+ u = NULL;
}
return u;
*******************************************************************************/
-bool threads_thread_is_alive(threadobject *thread)
+bool threads_thread_is_alive(threadobject *t)
{
- bool result;
-
- switch (thread->state) {
+ switch (t->state) {
case THREAD_STATE_NEW:
case THREAD_STATE_TERMINATED:
- result = false;
- break;
+ return false;
case THREAD_STATE_RUNNABLE:
case THREAD_STATE_BLOCKED:
case THREAD_STATE_WAITING:
case THREAD_STATE_TIMED_WAITING:
- result = true;
- break;
+ return true;
default:
- vm_abort("threads_is_alive: unknown thread state %d", thread->state);
+ vm_abort("threads_thread_is_alive: unknown thread state %d", t->state);
}
- return result;
+ /* keep compiler happy */
+
+ return false;
}
void threads_dump(void)
{
- threadobject *t;
- java_lang_Thread *object;
- utf *name;
+ threadobject *t;
/* XXX we should stop the world here */
- /* lock the threads table */
+ /* lock the threads lists */
- threads_table_lock();
+ threads_list_lock();
printf("Full thread dump CACAO "VERSION":\n");
/* iterate over all started threads */
- for (t = threads_table_first(); t != NULL; t = threads_table_next(t)) {
- /* get thread object */
+ for (t = threadlist_first(); t != NULL; t = threadlist_next(t)) {
+ /* ignore threads which are in state NEW */
+ if (t->state == THREAD_STATE_NEW)
+ continue;
- object = t->object;
+#if defined(ENABLE_GC_CACAO)
+ /* Suspend the thread. */
+ /* XXX Is the suspend reason correct? */
- /* the thread may be currently in initalization, don't print it */
+ if (threads_suspend_thread(t, SUSPEND_REASON_JNI) == false)
+ vm_abort("threads_dump: threads_suspend_thread failed");
+#endif
- if (object != NULL) {
- /* get thread name */
+ /* Print thread info. */
-#if defined(ENABLE_JAVASE)
- name = javastring_toutf((java_objectheader *) object->name, false);
-#elif defined(ENABLE_JAVAME_CLDC1_1)
- name = object->name;
-#endif
+ printf("\n");
+ threads_thread_print_info(t);
+ printf("\n");
- printf("\n\"");
- utf_display_printable_ascii(name);
- printf("\"");
+ /* Print trace of thread. */
- if (t->flags & THREAD_FLAG_DAEMON)
- printf(" daemon");
+ threads_thread_print_stacktrace(t);
- printf(" prio=%d", object->priority);
+#if defined(ENABLE_GC_CACAO)
+ /* Resume the thread. */
-#if SIZEOF_VOID_P == 8
- printf(" tid=0x%016lx (%ld)", (ptrint) t->tid, (ptrint) t->tid);
-#else
- printf(" tid=0x%08x (%d)", (ptrint) t->tid, (ptrint) t->tid);
+ if (threads_resume_thread(t) == false)
+ vm_abort("threads_dump: threads_resume_thread failed");
#endif
-
- /* print thread state */
-
- switch (t->state) {
- case THREAD_STATE_NEW:
- printf(" new");
- break;
- case THREAD_STATE_RUNNABLE:
- printf(" runnable");
- break;
- case THREAD_STATE_BLOCKED:
- printf(" blocked");
- break;
- case THREAD_STATE_WAITING:
- printf(" waiting");
- break;
- case THREAD_STATE_TIMED_WAITING:
- printf(" waiting on condition");
- break;
- case THREAD_STATE_TERMINATED:
- printf(" terminated");
- break;
- default:
- vm_abort("threads_dump: unknown thread state %d", t->state);
- }
-
- printf("\n");
-
- /* print trace of thread */
-
- threads_thread_print_stacktrace(t);
- }
}
- /* unlock the threads table */
+ /* unlock the threads lists */
- threads_table_unlock();
+ threads_list_unlock();
}
/* threads_thread_print_stacktrace *********************************************
- Print the current stacktrace of the current thread.
+ Print the current stacktrace of the given thread.
*******************************************************************************/
void threads_thread_print_stacktrace(threadobject *thread)
{
- stackframeinfo *sfi;
- stacktracebuffer *stb;
- s4 dumpsize;
-
- /* mark start of dump memory area */
+ stackframeinfo_t *sfi;
+ java_handle_bytearray_t *ba;
+ stacktrace_t *st;
- dumpsize = dump_size();
-
- /* create a stacktrace for the passed thread */
+ /* Build a stacktrace for the passed thread. */
sfi = thread->_stackframeinfo;
+ ba = stacktrace_get(sfi);
+
+ if (ba != NULL) {
+ /* We need a critical section here as we use the byte-array
+ data pointer directly. */
- stb = stacktrace_create(sfi);
+ LLNI_CRITICAL_START;
+
+ st = (stacktrace_t *) LLNI_array_data(ba);
+
+ /* Print stacktrace. */
- /* print stacktrace */
+ stacktrace_print(st);
- if (stb != NULL)
- stacktrace_print_trace_from_buffer(stb);
+ LLNI_CRITICAL_END;
+ }
else {
puts("\t<<No stacktrace available>>");
fflush(stdout);
}
-
- dump_release(dumpsize);
}
projects / cacao.git / blobdiff