/* 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.
#include "threads/critical.h"
#include "threads/lock-common.h"
+#include "threads/threadlist.h"
#include "threads/threads-common.h"
#include "toolbox/list.h"
/* global variables ***********************************************************/
-/* global threads list */
-static list_t *list_threads;
-
-/* global threads free-list */
-
-typedef struct thread_index_t {
- int32_t index;
- listnode_t linkage;
-} thread_index_t;
-
-static list_t *list_free_thread_index;
-
#if defined(__LINUX__)
/* XXX Remove for exact-GC. */
bool threads_pthreads_implementation_nptl;
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)
size_t len;
#endif
+ TRACESUBSYSTEMINITIALIZATION("threads_preinit");
+
#if defined(__LINUX__)
/* XXX Remove for exact-GC. */
# endif
#endif
- /* initialize the threads lists */
-
- list_threads = list_create(OFFSET(threadobject, linkage));
- list_free_thread_index = list_create(OFFSET(thread_index_t, linkage));
-
/* Initialize the threads implementation (sets the thinlock on the
main thread). */
/* store the internal thread data-structure in the TSD */
threads_set_current_threadobject(mainthread);
-
- /* initialize locking subsystems */
-
- lock_init();
-
- /* initialize the critical section */
-
- critical_init();
-}
-
-
-/* threads_list_first **********************************************************
-
- Return the first entry in the threads list.
-
- NOTE: This function does not lock the lists.
-
-*******************************************************************************/
-
-threadobject *threads_list_first(void)
-{
- threadobject *t;
-
- t = list_first_unsynced(list_threads);
-
- return t;
-}
-
-
-/* threads_list_next ***********************************************************
-
- Return the next entry in the threads list.
-
- NOTE: This function does not lock the lists.
-
-*******************************************************************************/
-
-threadobject *threads_list_next(threadobject *t)
-{
- threadobject *next;
-
- next = list_next_unsynced(list_threads, t);
-
- return next;
-}
-
-
-/* threads_list_get_non_daemons ************************************************
-
- Return the number of non-daemon threads.
-
- NOTE: This function does a linear-search over the threads list,
- because it's only used for joining the threads.
-
-*******************************************************************************/
-
-s4 threads_list_get_non_daemons(void)
-{
- threadobject *t;
- s4 nondaemons;
-
- /* lock the threads lists */
-
- threads_list_lock();
-
- nondaemons = 0;
-
- for (t = threads_list_first(); t != NULL; t = threads_list_next(t)) {
- if (!(t->flags & THREAD_FLAG_DAEMON))
- nondaemons++;
- }
-
- /* unlock the threads lists */
-
- threads_list_unlock();
-
- return nondaemons;
}
threadobject *threads_thread_new(void)
{
- thread_index_t *ti;
int32_t index;
threadobject *t;
threads_list_lock();
- /* Try to get a thread index from the free-list. */
+ index = threadlist_get_free_index();
- ti = list_first_unsynced(list_free_thread_index);
+ /* Allocate a thread data structure. */
- /* Is a free thread index available? */
+ /* First, try to get one from the free-list. */
- if (ti != NULL) {
- /* Yes, remove it from the free list, get the index and free
- the entry. */
+ t = threadlist_free_first();
- list_remove_unsynced(list_free_thread_index, ti);
+ if (t != NULL) {
+ /* Remove from free list. */
- index = ti->index;
+ threadlist_free_remove(t);
- FREE(ti, thread_index_t);
+ /* Equivalent of MZERO on the else path */
-#if defined(ENABLE_STATISTICS)
- if (opt_stat)
- size_thread_index_t -= sizeof(thread_index_t);
-#endif
+ threads_impl_thread_clear(t);
}
else {
- /* Get a new the thread index. */
-
- index = list_threads->size + 1;
- }
-
- /* Allocate a thread data structure. */
-
#if defined(ENABLE_GC_BOEHM)
- t = GCNEW_UNCOLLECTABLE(threadobject, 1);
+ t = GCNEW_UNCOLLECTABLE(threadobject, 1);
#else
- t = NEW(threadobject);
+ t = NEW(threadobject);
#endif
#if defined(ENABLE_STATISTICS)
- if (opt_stat)
- size_threadobject += sizeof(threadobject);
+ if (opt_stat)
+ size_threadobject += sizeof(threadobject);
#endif
- /* Clear memory. */
+ /* Clear memory. */
- MZERO(t, threadobject, 1);
+ MZERO(t, threadobject, 1);
#if defined(ENABLE_GC_CACAO)
- /* Register reference to java.lang.Thread with the GC. */
+ /* 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);
+ 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);
/* Initialize the implementation-specific bits. */
- threads_impl_thread_new(t);
+ threads_impl_thread_reuse(t);
- /* Add the thread to the threads-list. */
+ /* Add the thread to the thread list. */
- list_add_last_unsynced(list_threads, t);
+ threadlist_add(t);
/* Unlock the threads-lists. */
void threads_thread_free(threadobject *t)
{
- thread_index_t *ti;
-
/* Lock the threads lists. */
threads_list_lock();
- /* Cleanup the implementation specific bits. */
-
- threads_impl_thread_free(t);
+ /* Remove the thread from the thread-list. */
- /* Remove the thread from the threads-list. */
-
- list_remove_unsynced(list_threads, t);
+ threadlist_remove(t);
/* Add the thread index to the free list. */
- ti = NEW(thread_index_t);
-
-#if defined(ENABLE_STATISTICS)
- if (opt_stat)
- size_thread_index_t += sizeof(thread_index_t);
-#endif
+ threadlist_index_add(t->index);
- ti->index = t->index;
+ /* Add the thread data structure to the free list. */
- list_add_last_unsynced(list_free_thread_index, ti);
+ threads_thread_set_object(t, NULL);
- /* Free the thread data structure. */
-
-#if defined(ENABLE_GC_BOEHM)
- GCFREE(t);
-#else
- FREE(t, threadobject);
-#endif
-
-#if defined(ENABLE_STATISTICS)
- if (opt_stat)
- size_threadobject -= sizeof(threadobject);
-#endif
+ threadlist_free_add(t);
/* Unlock the threads lists. */
}
+/* 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.
/* iterate over all started threads */
- for (t = threads_list_first(); t != NULL; t = threads_list_next(t)) {
+ for (t = threadlist_first(); t != NULL; t = threadlist_next(t)) {
/* ignore threads which are in state NEW */
if (t->state == THREAD_STATE_NEW)
continue;
- /* print thread info */
+#if defined(ENABLE_GC_CACAO)
+ /* Suspend the thread. */
+ /* XXX Is the suspend reason correct? */
+
+ if (threads_suspend_thread(t, SUSPEND_REASON_JNI) == false)
+ vm_abort("threads_dump: threads_suspend_thread failed");
+#endif
+
+ /* Print thread info. */
printf("\n");
threads_thread_print_info(t);
printf("\n");
- /* print trace of thread */
+ /* Print trace of thread. */
threads_thread_print_stacktrace(t);
+
+#if defined(ENABLE_GC_CACAO)
+ /* Resume the thread. */
+
+ if (threads_resume_thread(t) == false)
+ vm_abort("threads_dump: threads_resume_thread failed");
+#endif
}
/* unlock the threads lists */
/* 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_t *sfi;
- stacktracebuffer *stb;
- s4 dumpsize;
+ stackframeinfo_t *sfi;
+ java_handle_bytearray_t *ba;
+ stacktrace_t *st;
- /* mark start of dump memory area */
-
- 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. */
- if (stb != NULL)
- stacktrace_print_trace_from_buffer(stb);
+ stacktrace_print(st);
+
+ LLNI_CRITICAL_END;
+ }
else {
puts("\t<<No stacktrace available>>");
fflush(stdout);
}
-
- dump_release(dumpsize);
}
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