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_VMThread.h"
#endif
+#include "threads/critical.h"
+#include "threads/lock-common.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"
+
+#if defined(ENABLE_STATISTICS)
+# include "vmcore/options.h"
+# include "vmcore/statistics.h"
+#endif
+
#include "vmcore/utf8.h"
-/* threads_create_thread *******************************************************
+/* global variables ***********************************************************/
+
+/* global threads list */
+static list_t *list_threads;
+
+/* global threads free-list */
+static list_t *list_threads_free;
+
+#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
+
+#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 lists */
+
+ list_threads = list_create(OFFSET(threadobject, linkage));
+ list_threads_free = list_create(OFFSET(threadobject, linkage));
+
+ /* 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);
+
+ /* 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();
- Creates a thread object with the given name.
+ return nondaemons;
+}
+
+
+/* threads_thread_new **********************************************************
+
+ Allocates and initializes an internal thread data-structure and
+ adds it to the threads list.
*******************************************************************************/
-threadobject *threads_create_thread(utf *name)
+threadobject *threads_thread_new(void)
{
- threadobject *thread;
- java_lang_Thread *t;
+ threadobject *t;
+
+ /* lock the threads-lists */
+
+ threads_list_lock();
+
+ /* try to get a thread from the free-list */
+
+ t = list_first_unsynced(list_threads_free);
+
+ /* is a free thread available? */
+
+ if (t != NULL) {
+ /* yes, remove it from the free list */
+
+ list_remove_unsynced(list_threads_free, t);
+ }
+ else {
+ /* no, allocate a new one */
+
+#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);
+
+ /* set the threads-index */
+
+ t->index = list_threads->size + 1;
+ }
+
+ /* pre-compute the thinlock-word */
+
+ assert(t->index != 0);
+
+ t->thinlock = lock_pre_compute_thinlock(t->index);
+ t->state = THREAD_STATE_NEW;
+
+ /* initialize the implementation-specific bits */
+
+ threads_impl_thread_new(t);
+
+ /* add the thread to the threads-list */
+
+ list_add_last_unsynced(list_threads, t);
+
+ /* unlock the threads-lists */
+
+ threads_list_unlock();
+
+ return t;
+}
+
+
+/* threads_thread_free *********************************************************
+
+ Frees an internal thread data-structure by removing it from the
+ threads-list and adding it to the free-list.
+
+ NOTE: The data-structure is NOT freed, the pointer keeps valid!
+
+*******************************************************************************/
+
+void threads_thread_free(threadobject *t)
+{
+ int32_t index;
+ uint32_t state;
+
+ /* lock the threads-lists */
+
+ threads_list_lock();
+
+ /* cleanup the implementation-specific bits */
+
+ threads_impl_thread_free(t);
+
+ /* remove the thread from the threads-list */
+
+ list_remove_unsynced(list_threads, t);
+
+ /* Clear memory, but keep the thread-index and the
+ thread-state. */
+
+ /* ATTENTION: Do this after list_remove, otherwise the linkage
+ pointers are invalid. */
+
+ index = t->index;
+ state = t->state;
+
+ MZERO(t, threadobject, 1);
+
+ t->index = index;
+ t->state = state;
+
+ /* add the thread to the free list */
+
+ list_add_first_unsynced(list_threads_free, 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;
+ t->object = 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)
+ 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_lang_Thread *object)
+{
+ threadobject *thread;
+#if defined(WITH_CLASSPATH_GNU)
+ java_lang_VMThread *vmt;
+#endif
+
+ /* Enter the join-mutex, so if the main-thread is currently
+ waiting to join all threads, the number of non-daemon threads
+ is correct. */
+
+ threads_mutex_join_lock();
+
+ /* create internal thread data-structure */
+
+ thread = threads_thread_new();
+
+ /* this is a normal Java thread */
+
+ thread->flags = THREAD_FLAG_JAVA;
+
#if defined(ENABLE_JAVASE)
- t->daemon = true;
+ /* is this a daemon thread? */
+
+ if (LLNI_field_direct(object, daemon) == true)
+ thread->flags |= THREAD_FLAG_DAEMON;
#endif
- t->priority = NORM_PRIORITY;
- /* return the thread object */
+ /* The thread is flagged and (non-)daemon thread, we can leave the
+ mutex. */
+
+ threads_mutex_join_unlock();
+
+ /* link the two objects together */
+
+ thread->object = object;
- return thread;
+#if defined(WITH_CLASSPATH_GNU)
+ LLNI_field_get_ref(object, 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(object, vm_thread, (java_lang_Object *) thread);
+#endif
+
+ /* Start the thread. Don't pass a function pointer (NULL) since
+ we want Thread.run()V here. */
+
+ 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;
+ utf *name;
+
+ assert(t->state != THREAD_STATE_NEW);
+
+ /* the thread may be currently in initalization, don't print it */
+
+ object = t->object;
+
+ if (object != NULL) {
+ /* get thread name */
+
+#if defined(WITH_CLASSPATH_GNU)
+ name = javastring_toutf((java_handle_t *) LLNI_field_direct(object, name), 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_thread_state_runnable ***********************************************
+
+ Set the current state of the given thread to THREAD_STATE_RUNNABLE.
+
+*******************************************************************************/
+
+void threads_thread_state_runnable(threadobject *t)
+{
+ /* set the state inside the lock */
+
+ threads_list_lock();
+
+ t->state = THREAD_STATE_RUNNABLE;
+
+ threads_list_unlock();
+}
+
+
+/* threads_thread_state_waiting ************************************************
+
+ Set the current state of the given thread to THREAD_STATE_WAITING.
+
+*******************************************************************************/
+
+void threads_thread_state_waiting(threadobject *t)
+{
+ /* set the state in the lock */
+
+ threads_list_lock();
+
+ t->state = THREAD_STATE_WAITING;
+
+ threads_list_unlock();
+}
+
+
+/* threads_thread_state_timed_waiting ******************************************
+
+ Set the current state of the given thread to
+ THREAD_STATE_TIMED_WAITING.
+
+*******************************************************************************/
+
+void threads_thread_state_timed_waiting(threadobject *t)
+{
+ /* set the state in the lock */
+
+ threads_list_lock();
+
+ t->state = THREAD_STATE_TIMED_WAITING;
+
+ 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;
+
+ 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 *thread)
+{
+ bool result;
+
+ switch (thread->state) {
+ case THREAD_STATE_NEW:
+ case THREAD_STATE_TERMINATED:
+ result = false;
+ break;
+
+ case THREAD_STATE_RUNNABLE:
+ case THREAD_STATE_BLOCKED:
+ case THREAD_STATE_WAITING:
+ case THREAD_STATE_TIMED_WAITING:
+ result = true;
+ break;
+
+ default:
+ vm_abort("threads_is_alive: unknown thread state %d", thread->state);
+
+ /* keep compiler happy */
+
+ result = false;
+ }
+
+ return result;
+}
+
+
+/* threads_dump ****************************************************************
+
+ Dumps info for all threads running in the JVM. This function is
+ called when SIGQUIT (<ctrl>-\) is sent to CACAO.
+
+*******************************************************************************/
+
+void threads_dump(void)
+{
+ 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 */
+
+ for (t = threads_list_first(); t != NULL; t = threads_list_next(t)) {
+ /* print thread info */
+
+ printf("\n");
+ threads_thread_print_info(t);
+ printf("\n");
+
+ /* print trace of thread */
+
+ threads_thread_print_stacktrace(t);
+ }
+
+ /* unlock the threads lists */
+
+ threads_list_unlock();
+}
+
+
+/* threads_thread_print_stacktrace *********************************************
+
+ Print the current stacktrace of the current thread.
+
+*******************************************************************************/
+
+void threads_thread_print_stacktrace(threadobject *thread)
+{
+ stackframeinfo *sfi;
+ stacktracebuffer *stb;
+ s4 dumpsize;
+
+ /* mark start of dump memory area */
+
+ dumpsize = dump_size();
+
+ /* create a stacktrace for the passed thread */
+
+ sfi = thread->_stackframeinfo;
+
+ stb = stacktrace_create(sfi);
+
+ /* print stacktrace */
+
+ if (stb != NULL)
+ stacktrace_print_trace_from_buffer(stb);
+ else {
+ puts("\t<<No stacktrace available>>");
+ fflush(stdout);
+ }
+
+ dump_release(dumpsize);
+}
+
+
+/* threads_print_stacktrace ****************************************************
+
+ Print the current stacktrace of the current thread.
+
+*******************************************************************************/
+
+void threads_print_stacktrace(void)
+{
+ threadobject *thread;
+
+ thread = THREADOBJECT;
+
+ threads_thread_print_stacktrace(thread);
+}
+
+
/*
* These are local overrides for various environment variables in Emacs.
* Please do not remove this and leave it at the end of the file, where
projects / cacao.git / blobdiff