/* 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: signal.c 7246 2007-01-29 18:49:05Z 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 "threads/native/threads.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/statistics.h"
+#endif
+
#include "vmcore/utf8.h"
-/* threads_create_thread *******************************************************
+/* global variables ***********************************************************/
+
+#if defined(__LINUX__)
+/* XXX Remove for exact-GC. */
+bool threads_pthreads_implementation_nptl;
+#endif
+
- Creates a thread object with the given name.
+/* threads_preinit *************************************************************
+
+ Do some early initialization of stuff required.
*******************************************************************************/
-threadobject *threads_create_thread(utf *name)
+void threads_preinit(void)
{
- threadobject *thread;
- java_lang_Thread *t;
+ 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). */
+
+ threads_impl_preinit();
+
+ /* create internal thread data-structure for the main thread */
+
+ mainthread = threads_thread_new();
+
+ /* thread is a Java thread and running */
+
+ mainthread->flags |= THREAD_FLAG_JAVA;
+ mainthread->state = THREAD_STATE_RUNNABLE;
+
+ /* store the internal thread data-structure in the TSD */
+
+ threads_set_current_threadobject(mainthread);
+}
+
+
+/* threads_thread_new **********************************************************
+
+ Allocates and initializes an internal thread data-structure and
+ adds it to the threads list.
+
+*******************************************************************************/
+
+threadobject *threads_thread_new(void)
+{
+ int32_t index;
+ threadobject *t;
+
+ /* lock the threads-lists */
+
+ threads_list_lock();
+
+ index = threadlist_get_free_index();
+
+ /* Allocate a thread data structure. */
+
+ /* First, try to get one from the free-list. */
+
+ t = threadlist_free_first();
+
+ if (t != NULL) {
+ /* Remove from free list. */
+
+ threadlist_free_remove(t);
+
+ /* Equivalent of MZERO on the else path */
+
+ threads_impl_thread_clear(t);
+ }
+ else {
+#if defined(ENABLE_GC_BOEHM)
+ t = GCNEW_UNCOLLECTABLE(threadobject, 1);
+#else
+ t = NEW(threadobject);
+#endif
+
+#if defined(ENABLE_STATISTICS)
+ if (opt_stat)
+ size_threadobject += sizeof(threadobject);
+#endif
+
+ /* Clear memory. */
+
+ MZERO(t, threadobject, 1);
+
+#if defined(ENABLE_GC_CACAO)
+ /* Register reference to java.lang.Thread with the GC. */
+ /* FIXME is it ok to do this only once? */
+
+ gc_reference_register(&(t->object), GC_REFTYPE_THREADOBJECT);
+ gc_reference_register(&(t->_exceptionptr), GC_REFTYPE_THREADOBJECT);
+#endif
+
+ /* Initialize the implementation-specific bits. */
+
+ threads_impl_thread_init(t);
+ }
+
+ /* Pre-compute the thinlock-word. */
+
+ assert(index != 0);
+
+ t->index = index;
+ t->thinlock = lock_pre_compute_thinlock(t->index);
+ t->flags = 0;
+ t->state = THREAD_STATE_NEW;
+
+#if defined(ENABLE_GC_CACAO)
+ t->flags |= THREAD_FLAG_IN_NATIVE;
+#endif
+
+ /* Initialize the implementation-specific bits. */
+
+ threads_impl_thread_reuse(t);
+
+ /* Add the thread to the thread list. */
+
+ threadlist_add(t);
+
+ /* Unlock the threads-lists. */
+
+ threads_list_unlock();
+
+ return t;
+}
+
+
+/* threads_thread_free *********************************************************
+
+ 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.
+
+ IN:
+ t....thread data structure
+
+*******************************************************************************/
+
+void threads_thread_free(threadobject *t)
+{
+ /* Lock the threads lists. */
+
+ threads_list_lock();
+
+ /* Remove the thread from the thread-list. */
+
+ threadlist_remove(t);
+
+ /* Add the thread index to the free list. */
+
+ threadlist_index_add(t->index);
+
+ /* Add the thread data structure to the free list. */
+
+ threads_thread_set_object(t, NULL);
+
+ threadlist_free_add(t);
+
+ /* Unlock the threads lists. */
+
+ threads_list_unlock();
+}
+
+
+/* threads_thread_start_internal ***********************************************
+
+ 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
+
+*******************************************************************************/
+
+bool threads_thread_start_internal(utf *name, functionptr f)
+{
+ threadobject *t;
+ java_lang_Thread *object;
#if defined(WITH_CLASSPATH_GNU)
java_lang_VMThread *vmt;
#endif
- /* create the vm internal thread object */
+ /* Enter the join-mutex, so if the main-thread is currently
+ waiting to join all threads, the number of non-daemon threads
+ is correct. */
- thread = NEW(threadobject);
+ threads_mutex_join_lock();
- if (thread == NULL)
- return NULL;
+ /* create internal thread data-structure */
+
+ t = threads_thread_new();
+
+ t->flags |= THREAD_FLAG_INTERNAL | THREAD_FLAG_DAEMON;
+
+ /* The thread is flagged as (non-)daemon thread, we can leave the
+ mutex. */
+
+ threads_mutex_join_unlock();
/* create the java thread object */
- t = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
+ object = (java_lang_Thread *) builtin_new(class_java_lang_Thread);
- if (t == NULL)
- return NULL;
+ /* XXX memory leak!!! */
+ if (object == NULL)
+ return false;
#if defined(WITH_CLASSPATH_GNU)
vmt = (java_lang_VMThread *) builtin_new(class_java_lang_VMThread);
+ /* XXX memory leak!!! */
if (vmt == NULL)
- return NULL;
+ return false;
- vmt->thread = t;
- vmt->vmdata = (java_lang_Object *) thread;
+ LLNI_field_set_ref(vmt, thread, object);
+ LLNI_field_set_val(vmt, vmdata, (java_lang_Object *) t);
- t->vmThread = vmt;
+ LLNI_field_set_ref(object, vmThread, vmt);
#elif defined(WITH_CLASSPATH_CLDC1_1)
- t->vm_thread = (java_lang_Object *) thread;
+ LLNI_field_set_val(object, vm_thread, (java_lang_Object *) t);
#endif
- thread->object = t;
- thread->flags = THREAD_FLAG_DAEMON;
+ threads_thread_set_object(t, (java_handle_t *) object);
/* set java.lang.Thread fields */
- t->name = javastring_new(name);
+#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)
- t->daemon = true;
+ LLNI_field_set_val(object, daemon , true);
+#endif
+
+ LLNI_field_set_val(object, priority, NORM_PRIORITY);
+
+ /* start the thread */
+
+ threads_impl_thread_start(t, f);
+
+ /* everything's ok */
+
+ return true;
+}
+
+
+/* threads_thread_start ********************************************************
+
+ Start a Java thread in the JVM. Only the java thread object exists
+ so far.
+
+ IN:
+ object.....the java thread object java.lang.Thread
+
+*******************************************************************************/
+
+void threads_thread_start(java_handle_t *object)
+{
+ java_lang_Thread *o;
+ threadobject *thread;
+#if defined(WITH_CLASSPATH_GNU)
+ java_lang_VMThread *vmt;
+#endif
+
+ o = (java_lang_Thread *) object;
+
+ /* Enter the join-mutex, so if the main-thread is currently
+ waiting to join all threads, the number of non-daemon threads
+ is correct. */
+
+ threads_mutex_join_lock();
+
+ /* create internal thread data-structure */
+
+ thread = threads_thread_new();
+
+ /* this is a normal Java thread */
+
+ thread->flags |= THREAD_FLAG_JAVA;
+
+#if defined(ENABLE_JAVASE)
+ /* is this a daemon thread? */
+
+ if (LLNI_field_direct(o, daemon) == true)
+ thread->flags |= THREAD_FLAG_DAEMON;
+#endif
+
+ /* The thread is flagged and (non-)daemon thread, we can leave the
+ mutex. */
+
+ threads_mutex_join_unlock();
+
+ /* link the two objects together */
+
+ threads_thread_set_object(thread, object);
+
+#if defined(WITH_CLASSPATH_GNU)
+ LLNI_field_get_ref(o, vmThread, vmt);
+
+ assert(vmt);
+ assert(LLNI_field_direct(vmt, vmdata) == NULL);
+
+ 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
- t->priority = NORM_PRIORITY;
- /* return the thread object */
+ /* 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_thread_print_info ***************************************************
+
+ Print information of the passed thread.
+
+*******************************************************************************/
+
+void threads_thread_print_info(threadobject *t)
+{
+ java_lang_Thread *object;
+#if defined(WITH_CLASSPATH_GNU)
+ java_lang_String *namestring;
+#endif
+ utf *name;
+
+ assert(t->state != THREAD_STATE_NEW);
+
+ /* the thread may be currently in initalization, don't print it */
+
+ object = (java_lang_Thread *) threads_thread_get_object(t);
+
+ if (object != NULL) {
+ /* get thread name */
+
+#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 (t->flags & THREAD_FLAG_DAEMON)
+ printf(" daemon");
+
+ printf(" prio=%d", LLNI_field_direct(object, priority));
+
+#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
+
+ printf(" index=%d", t->index);
+
+ /* 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_thread_print_info: unknown thread state %d",
+ t->state);
+ }
+ }
}
}
+/* threads_get_current_object **************************************************
+
+ Return the Java object of the current thread.
+
+ RETURN VALUE:
+ the Java object
+
+*******************************************************************************/
+
+#include "native/include/java_lang_ThreadGroup.h"
+
+java_object_t *threads_get_current_object(void)
+{
+#if defined(ENABLE_THREADS)
+ threadobject *t;
+# if defined(ENABLE_JAVASE)
+ java_lang_ThreadGroup *group;
+# endif
+#endif
+ java_lang_Thread *o;
+
+#if defined(ENABLE_THREADS)
+ t = THREADOBJECT;
+ o = threads_thread_get_object(t);
+
+# 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. */
+
+ LLNI_field_get_ref(o, group, group);
+
+ if (group == NULL) {
+ /* ThreadGroup of currentThread is not initialized */
+
+ group = (java_lang_ThreadGroup *)
+ native_new_and_init(class_java_lang_ThreadGroup);
+
+ if (group == NULL)
+ vm_abort("unable to create ThreadGroup");
+
+ 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. */
+
+ o = builtin_new(class_java_lang_Thread);
+#endif
+
+ return o;
+}
+
+
+/* threads_thread_state_runnable ***********************************************
+
+ Set the current state of the given thread to THREAD_STATE_RUNNABLE.
+
+ NOTE: If the thread has already terminated, don't set the state.
+ This is important for threads_detach_thread.
+
+*******************************************************************************/
+
+void threads_thread_state_runnable(threadobject *t)
+{
+ /* Set the state inside a lock. */
+
+ threads_list_lock();
+
+ if (t->state != THREAD_STATE_TERMINATED)
+ t->state = THREAD_STATE_RUNNABLE;
+
+ DEBUGTHREADS("is RUNNABLE", t);
+
+ threads_list_unlock();
+}
+
+
+/* threads_thread_state_waiting ************************************************
+
+ Set the current state of the given thread to THREAD_STATE_WAITING.
+
+ NOTE: If the thread has already terminated, don't set the state.
+ This is important for threads_detach_thread.
+
+*******************************************************************************/
+
+void threads_thread_state_waiting(threadobject *t)
+{
+ /* Set the state inside a lock. */
+
+ threads_list_lock();
+
+ if (t->state != THREAD_STATE_TERMINATED)
+ t->state = THREAD_STATE_WAITING;
+
+ DEBUGTHREADS("is WAITING", t);
+
+ threads_list_unlock();
+}
+
+
+/* threads_thread_state_timed_waiting ******************************************
+
+ Set the current state of the given thread to
+ THREAD_STATE_TIMED_WAITING.
+
+ NOTE: If the thread has already terminated, don't set the state.
+ This is important for threads_detach_thread.
+
+*******************************************************************************/
+
+void threads_thread_state_timed_waiting(threadobject *t)
+{
+ /* Set the state inside a lock. */
+
+ threads_list_lock();
+
+ if (t->state != THREAD_STATE_TERMINATED)
+ t->state = THREAD_STATE_TIMED_WAITING;
+
+ DEBUGTHREADS("is TIMED_WAITING", t);
+
+ threads_list_unlock();
+}
+
+
+/* threads_thread_state_terminated *********************************************
+
+ Set the current state of the given thread to
+ THREAD_STATE_TERMINATED.
+
+*******************************************************************************/
+
+void threads_thread_state_terminated(threadobject *t)
+{
+ /* set the state in the lock */
+
+ threads_list_lock();
+
+ t->state = THREAD_STATE_TERMINATED;
+
+ DEBUGTHREADS("is TERMINATED", t);
+
+ threads_list_unlock();
+}
+
+
+/* threads_thread_get_state ****************************************************
+
+ Returns the current state of the given thread.
+
+*******************************************************************************/
+
+utf *threads_thread_get_state(threadobject *t)
+{
+ utf *u;
+
+ switch (t->state) {
+ case THREAD_STATE_NEW:
+ u = utf_new_char("NEW");
+ break;
+ case THREAD_STATE_RUNNABLE:
+ u = utf_new_char("RUNNABLE");
+ break;
+ case THREAD_STATE_BLOCKED:
+ u = utf_new_char("BLOCKED");
+ break;
+ case THREAD_STATE_WAITING:
+ u = utf_new_char("WAITING");
+ break;
+ case THREAD_STATE_TIMED_WAITING:
+ u = utf_new_char("TIMED_WAITING");
+ break;
+ case THREAD_STATE_TERMINATED:
+ u = utf_new_char("TERMINATED");
+ break;
+ default:
+ vm_abort("threads_get_state: unknown thread state %d", t->state);
+
+ /* keep compiler happy */
+
+ u = NULL;
+ }
+
+ return u;
+}
+
+
+/* threads_thread_is_alive *****************************************************
+
+ Returns if the give thread is alive.
+
+*******************************************************************************/
+
+bool threads_thread_is_alive(threadobject *t)
+{
+ switch (t->state) {
+ case THREAD_STATE_NEW:
+ case THREAD_STATE_TERMINATED:
+ return false;
+
+ case THREAD_STATE_RUNNABLE:
+ case THREAD_STATE_BLOCKED:
+ case THREAD_STATE_WAITING:
+ case THREAD_STATE_TIMED_WAITING:
+ return true;
+
+ default:
+ vm_abort("threads_thread_is_alive: unknown thread state %d", t->state);
+ }
+
+ /* keep compiler happy */
+
+ return false;
+}
+
+
/* threads_dump ****************************************************************
Dumps info for all threads running in the JVM. This function is
void threads_dump(void)
{
- threadobject *thread;
- java_lang_Thread *t;
- utf *name;
-
- thread = mainthreadobj;
+ threadobject *t;
/* XXX we should stop the world here */
+ /* lock the threads lists */
+
+ threads_list_lock();
+
printf("Full thread dump CACAO "VERSION":\n");
/* iterate over all started threads */
- do {
- /* 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;
- t = thread->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 (t != NULL) {
- /* get thread name */
+ /* Print thread info. */
-#if defined(ENABLE_JAVASE)
- name = javastring_toutf(t->name, false);
-#elif defined(ENABLE_JAVAME_CLDC1_1)
- name = t->name;
-#endif
+ printf("\n");
+ threads_thread_print_info(t);
+ printf("\n");
- printf("\n\"");
- utf_display_printable_ascii(name);
- printf("\" ");
+ /* Print trace of thread. */
- if (thread->flags & THREAD_FLAG_DAEMON)
- printf("daemon ");
+ threads_thread_print_stacktrace(t);
-#if SIZEOF_VOID_P == 8
- printf("prio=%d tid=0x%016lx\n", t->priority, (ptrint) thread->tid);
-#else
- printf("prio=%d tid=0x%08lx\n", t->priority, (ptrint) thread->tid);
+#if defined(ENABLE_GC_CACAO)
+ /* Resume the thread. */
+
+ if (threads_resume_thread(t) == false)
+ vm_abort("threads_dump: threads_resume_thread failed");
#endif
+ }
- /* print trace of thread */
+ /* unlock the threads lists */
- threads_print_stacktrace(thread);
- }
-
- thread = thread->next;
- } while ((thread != NULL) && (thread != mainthreadobj));
+ threads_list_unlock();
}
-/* threads_print_stacktrace ****************************************************
+/* threads_thread_print_stacktrace *********************************************
Print the current stacktrace of the given thread.
*******************************************************************************/
-void threads_print_stacktrace(threadobject *thread)
+void threads_thread_print_stacktrace(threadobject *thread)
{
- stacktracebuffer *stb;
- s4 dumpsize;
+ stackframeinfo_t *sfi;
+ java_handle_bytearray_t *ba;
+ stacktrace_t *st;
- /* mark start of dump memory area */
+ /* Build a stacktrace for the passed thread. */
- dumpsize = dump_size();
+ 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. */
- /* create a stacktrace for the current thread */
+ LLNI_CRITICAL_START;
+
+ st = (stacktrace_t *) LLNI_array_data(ba);
- stb = stacktrace_create(thread);
+ /* 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);
}
+}
+
+
+/* threads_print_stacktrace ****************************************************
+
+ Print the current stacktrace of the current thread.
+
+*******************************************************************************/
+
+void threads_print_stacktrace(void)
+{
+ threadobject *thread;
+
+ thread = THREADOBJECT;
- dump_release(dumpsize);
+ threads_thread_print_stacktrace(thread);
}
projects / cacao.git / blobdiff