1 // prims.cc - Code for core of runtime environment.
3 /* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation
5 This file is part of libgcj.
7 This software is copyrighted work licensed under the terms of the
8 Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
26 #include <java-signal.h>
27 #include <java-threads.h>
31 #include <java/lang/ThreadGroup.h>
34 #ifndef DISABLE_GETENV_PROPERTIES
36 #include <java-props.h>
37 #define PROCESS_GCJ_PROPERTIES process_gcj_properties()
39 #define PROCESS_GCJ_PROPERTIES
40 #endif // DISABLE_GETENV_PROPERTIES
42 #include <java/lang/Class.h>
43 #include <java/lang/ClassLoader.h>
44 #include <java/lang/Runtime.h>
45 #include <java/lang/String.h>
46 #include <java/lang/Thread.h>
47 #include <java/lang/ThreadGroup.h>
48 #include <java/lang/ArrayIndexOutOfBoundsException.h>
49 #include <java/lang/ArithmeticException.h>
50 #include <java/lang/ClassFormatError.h>
51 #include <java/lang/InternalError.h>
52 #include <java/lang/NegativeArraySizeException.h>
53 #include <java/lang/NullPointerException.h>
54 #include <java/lang/OutOfMemoryError.h>
55 #include <java/lang/System.h>
56 #include <java/lang/VMThrowable.h>
57 #include <java/lang/reflect/Modifier.h>
58 #include <java/io/PrintStream.h>
59 #include <java/lang/UnsatisfiedLinkError.h>
60 #include <java/lang/VirtualMachineError.h>
61 #include <gnu/gcj/runtime/VMClassLoader.h>
62 #include <gnu/gcj/runtime/FinalizerThread.h>
63 #include <gnu/java/lang/MainThread.h>
69 // We allocate a single OutOfMemoryError exception which we keep
70 // around for use if we run out of memory.
71 static java::lang::OutOfMemoryError *no_memory;
73 // Number of bytes in largest array object we create. This could be
74 // increased to the largest size_t value, so long as the appropriate
75 // functions are changed to take a size_t argument instead of jint.
76 #define MAX_OBJECT_SIZE ((1<<31) - 1)
78 static const char *no_properties[] = { NULL };
80 // Properties set at compile time.
81 const char **_Jv_Compiler_Properties = no_properties;
83 // The JAR file to add to the beginning of java.class.path.
84 const char *_Jv_Jar_Class_Path;
86 #ifndef DISABLE_GETENV_PROPERTIES
87 // Property key/value pairs.
88 property_pair *_Jv_Environment_Properties;
91 // Stash the argv pointer to benefit native libraries that need it.
92 const char **_Jv_argv;
99 // _Jv_argc is 0 if not explicitly initialized.
104 _Jv_GetSafeArg (int index)
106 if (index >=0 && index < _Jv_GetNbArgs ())
107 return _Jv_argv[index];
113 _Jv_SetArgs (int argc, const char **argv)
120 // Pointer to JVMPI notification functions.
121 void (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (JVMPI_Event *event);
122 void (*_Jv_JVMPI_Notify_THREAD_START) (JVMPI_Event *event);
123 void (*_Jv_JVMPI_Notify_THREAD_END) (JVMPI_Event *event);
127 /* Unblock a signal. Unless we do this, the signal may only be sent
130 unblock_signal (int signum)
132 #ifdef _POSIX_VERSION
136 sigaddset (&sigs, signum);
137 sigprocmask (SIG_UNBLOCK, &sigs, NULL);
142 SIGNAL_HANDLER (catch_segv)
144 java::lang::NullPointerException *nullp
145 = new java::lang::NullPointerException;
146 unblock_signal (SIGSEGV);
147 MAKE_THROW_FRAME (nullp);
153 SIGNAL_HANDLER (catch_fpe)
155 java::lang::ArithmeticException *arithexception
156 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
157 unblock_signal (SIGFPE);
158 #ifdef HANDLE_DIVIDE_OVERFLOW
159 HANDLE_DIVIDE_OVERFLOW;
161 MAKE_THROW_FRAME (arithexception);
163 throw arithexception;
170 _Jv_equalUtf8Consts (const Utf8Const* a, const Utf8Const *b)
173 const _Jv_ushort *aptr, *bptr;
176 if (a->hash != b->hash)
179 if (b->length != len)
181 aptr = (const _Jv_ushort *)a->data;
182 bptr = (const _Jv_ushort *)b->data;
183 len = (len + 1) >> 1;
185 if (*aptr++ != *bptr++)
190 /* True iff A is equal to STR.
191 HASH is STR->hashCode().
195 _Jv_equal (Utf8Const* a, jstring str, jint hash)
197 if (a->hash != (_Jv_ushort) hash)
199 jint len = str->length();
201 jchar *sptr = _Jv_GetStringChars (str);
202 unsigned char* ptr = (unsigned char*) a->data;
203 unsigned char* limit = ptr + a->length;
206 int ch = UTF8_GET (ptr, limit);
215 /* Like _Jv_equal, but stop after N characters. */
217 _Jv_equaln (Utf8Const *a, jstring str, jint n)
219 jint len = str->length();
221 jchar *sptr = _Jv_GetStringChars (str);
222 unsigned char* ptr = (unsigned char*) a->data;
223 unsigned char* limit = ptr + a->length;
224 for (; n-- > 0; i++, sptr++)
226 int ch = UTF8_GET (ptr, limit);
235 /* Count the number of Unicode chars encoded in a given Ut8 string. */
237 _Jv_strLengthUtf8(char* str, int len)
240 unsigned char* limit;
243 ptr = (unsigned char*) str;
246 for (; ptr < limit; str_length++)
248 if (UTF8_GET (ptr, limit) < 0)
254 /* Calculate a hash value for a string encoded in Utf8 format.
255 * This returns the same hash value as specified or java.lang.String.hashCode.
258 hashUtf8String (char* str, int len)
260 unsigned char* ptr = (unsigned char*) str;
261 unsigned char* limit = ptr + len;
266 int ch = UTF8_GET (ptr, limit);
267 /* Updated specification from
268 http://www.javasoft.com/docs/books/jls/clarify.html. */
269 hash = (31 * hash) + ch;
275 _Jv_makeUtf8Const (char* s, int len)
279 Utf8Const* m = (Utf8Const*) _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
280 memcpy (m->data, s, len);
283 m->hash = hashUtf8String (s, len) & 0xFFFF;
288 _Jv_makeUtf8Const (jstring string)
290 jint hash = string->hashCode ();
291 jint len = _Jv_GetStringUTFLength (string);
293 Utf8Const* m = (Utf8Const*)
294 _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
299 _Jv_GetStringUTFRegion (string, 0, string->length (), m->data);
309 _Jv_Abort (const char *function, const char *file, int line,
313 _Jv_Abort (const char *, const char *, int, const char *message)
318 "libgcj failure: %s\n in function %s, file %s, line %d\n",
319 message, function, file, line);
321 fprintf (stderr, "libgcj failure: %s\n", message);
327 fail_on_finalization (jobject)
329 JvFail ("object was finalized");
333 _Jv_GCWatch (jobject obj)
335 _Jv_RegisterFinalizer (obj, fail_on_finalization);
339 _Jv_ThrowBadArrayIndex(jint bad_index)
341 throw new java::lang::ArrayIndexOutOfBoundsException
342 (java::lang::String::valueOf (bad_index));
346 _Jv_ThrowNullPointerException ()
348 throw new java::lang::NullPointerException;
351 // Explicitly throw a no memory exception.
352 // The collector calls this when it encounters an out-of-memory condition.
353 void _Jv_ThrowNoMemory()
360 jvmpi_notify_alloc(jclass klass, jint size, jobject obj)
362 // Service JVMPI allocation request.
363 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
367 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
369 event.u.obj_alloc.arena_id = 0;
370 event.u.obj_alloc.class_id = (jobjectID) klass;
371 event.u.obj_alloc.is_array = 0;
372 event.u.obj_alloc.size = size;
373 event.u.obj_alloc.obj_id = (jobjectID) obj;
375 // FIXME: This doesn't look right for the Boehm GC. A GC may
376 // already be in progress. _Jv_DisableGC () doesn't wait for it.
377 // More importantly, I don't see the need for disabling GC, since we
378 // blatantly have a pointer to obj on our stack, ensuring that the
379 // object can't be collected. Even for a nonconservative collector,
380 // it appears to me that this must be true, since we are about to
381 // return obj. Isn't this whole approach way too intrusive for
382 // a useful profiling interface? - HB
384 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
388 #else /* !ENABLE_JVMPI */
389 # define jvmpi_notify_alloc(klass,size,obj) /* do nothing */
392 // Allocate a new object of class KLASS.
393 // First a version that assumes that we have no finalizer, and that
394 // the class is already initialized.
395 // If we know that JVMPI is disabled, this can be replaced by a direct call
396 // to the allocator for the appropriate GC.
398 _Jv_AllocObjectNoInitNoFinalizer (jclass klass)
400 jint size = klass->size ();
401 jobject obj = (jobject) _Jv_AllocObj (size, klass);
402 jvmpi_notify_alloc (klass, size, obj);
406 // And now a version that initializes if necessary.
408 _Jv_AllocObjectNoFinalizer (jclass klass)
410 _Jv_InitClass (klass);
411 jint size = klass->size ();
412 jobject obj = (jobject) _Jv_AllocObj (size, klass);
413 jvmpi_notify_alloc (klass, size, obj);
417 // And now the general version that registers a finalizer if necessary.
419 _Jv_AllocObject (jclass klass)
421 jobject obj = _Jv_AllocObjectNoFinalizer (klass);
423 // We assume that the compiler only generates calls to this routine
424 // if there really is an interesting finalizer.
425 // Unfortunately, we still have to the dynamic test, since there may
426 // be cni calls to this routine.
427 // Note that on IA64 get_finalizer() returns the starting address of the
428 // function, not a function pointer. Thus this still works.
429 if (klass->vtable->get_finalizer ()
430 != java::lang::Object::class$.vtable->get_finalizer ())
431 _Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
435 // Allocate a String, including variable length storage.
437 _Jv_AllocString(jsize len)
439 using namespace java::lang;
441 jsize sz = sizeof(java::lang::String) + len * sizeof(jchar);
443 // We assert that for strings allocated this way, the data field
444 // will always point to the object itself. Thus there is no reason
445 // for the garbage collector to scan any of it.
446 // Furthermore, we're about to overwrite the string data, so
447 // initialization of the object is not an issue.
449 // String needs no initialization, and there is no finalizer, so
450 // we can go directly to the collector's allocator interface.
451 jstring obj = (jstring) _Jv_AllocPtrFreeObj(sz, &String::class$);
454 obj->boffset = sizeof(java::lang::String);
456 obj->cachedHashCode = 0;
459 // Service JVMPI request.
461 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
465 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
467 event.u.obj_alloc.arena_id = 0;
468 event.u.obj_alloc.class_id = (jobjectID) &String::class$;
469 event.u.obj_alloc.is_array = 0;
470 event.u.obj_alloc.size = sz;
471 event.u.obj_alloc.obj_id = (jobjectID) obj;
474 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
482 // A version of the above that assumes the object contains no pointers,
483 // and requires no finalization. This can't happen if we need pointers
485 #ifdef JV_HASH_SYNCHRONIZATION
487 _Jv_AllocPtrFreeObject (jclass klass)
489 _Jv_InitClass (klass);
490 jint size = klass->size ();
492 jobject obj = (jobject) _Jv_AllocPtrFreeObj (size, klass);
495 // Service JVMPI request.
497 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
501 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
503 event.u.obj_alloc.arena_id = 0;
504 event.u.obj_alloc.class_id = (jobjectID) klass;
505 event.u.obj_alloc.is_array = 0;
506 event.u.obj_alloc.size = size;
507 event.u.obj_alloc.obj_id = (jobjectID) obj;
510 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
517 #endif /* JV_HASH_SYNCHRONIZATION */
520 // Allocate a new array of Java objects. Each object is of type
521 // `elementClass'. `init' is used to initialize each slot in the
524 _Jv_NewObjectArray (jsize count, jclass elementClass, jobject init)
526 if (__builtin_expect (count < 0, false))
527 throw new java::lang::NegativeArraySizeException;
529 JvAssert (! elementClass->isPrimitive ());
531 // Ensure that elements pointer is properly aligned.
532 jobjectArray obj = NULL;
533 size_t size = (size_t) elements (obj);
534 // Check for overflow.
535 if (__builtin_expect ((size_t) count >
536 (MAX_OBJECT_SIZE - 1 - size) / sizeof (jobject), false))
539 size += count * sizeof (jobject);
541 jclass klass = _Jv_GetArrayClass (elementClass,
542 elementClass->getClassLoaderInternal());
544 obj = (jobjectArray) _Jv_AllocArray (size, klass);
546 jsize *lp = const_cast<jsize *> (&obj->length);
548 // We know the allocator returns zeroed memory. So don't bother
552 jobject *ptr = elements(obj);
559 // Allocate a new array of primitives. ELTYPE is the type of the
560 // element, COUNT is the size of the array.
562 _Jv_NewPrimArray (jclass eltype, jint count)
564 int elsize = eltype->size();
565 if (__builtin_expect (count < 0, false))
566 throw new java::lang::NegativeArraySizeException;
568 JvAssert (eltype->isPrimitive ());
569 jobject dummy = NULL;
570 size_t size = (size_t) _Jv_GetArrayElementFromElementType (dummy, eltype);
572 // Check for overflow.
573 if (__builtin_expect ((size_t) count >
574 (MAX_OBJECT_SIZE - size) / elsize, false))
577 jclass klass = _Jv_GetArrayClass (eltype, 0);
579 # ifdef JV_HASH_SYNCHRONIZATION
580 // Since the vtable is always statically allocated,
581 // these are completely pointerfree! Make sure the GC doesn't touch them.
583 (__JArray*) _Jv_AllocPtrFreeObj (size + elsize * count, klass);
584 memset((char *)arr + size, 0, elsize * count);
586 __JArray *arr = (__JArray*) _Jv_AllocObj (size + elsize * count, klass);
587 // Note that we assume we are given zeroed memory by the allocator.
590 jsize *lp = const_cast<jsize *> (&arr->length);
597 _Jv_NewArray (jint type, jint size)
601 case 4: return JvNewBooleanArray (size);
602 case 5: return JvNewCharArray (size);
603 case 6: return JvNewFloatArray (size);
604 case 7: return JvNewDoubleArray (size);
605 case 8: return JvNewByteArray (size);
606 case 9: return JvNewShortArray (size);
607 case 10: return JvNewIntArray (size);
608 case 11: return JvNewLongArray (size);
610 throw new java::lang::InternalError
611 (JvNewStringLatin1 ("invalid type code in _Jv_NewArray"));
614 // Allocate a possibly multi-dimensional array but don't check that
615 // any array length is <0.
617 _Jv_NewMultiArrayUnchecked (jclass type, jint dimensions, jint *sizes)
619 JvAssert (type->isArray());
620 jclass element_type = type->getComponentType();
622 if (element_type->isPrimitive())
623 result = _Jv_NewPrimArray (element_type, sizes[0]);
625 result = _Jv_NewObjectArray (sizes[0], element_type, NULL);
629 JvAssert (! element_type->isPrimitive());
630 JvAssert (element_type->isArray());
631 jobject *contents = elements ((jobjectArray) result);
632 for (int i = 0; i < sizes[0]; ++i)
633 contents[i] = _Jv_NewMultiArrayUnchecked (element_type, dimensions - 1,
641 _Jv_NewMultiArray (jclass type, jint dimensions, jint *sizes)
643 for (int i = 0; i < dimensions; ++i)
645 throw new java::lang::NegativeArraySizeException;
647 return _Jv_NewMultiArrayUnchecked (type, dimensions, sizes);
651 _Jv_NewMultiArray (jclass array_type, jint dimensions, ...)
654 jint sizes[dimensions];
655 va_start (args, dimensions);
656 for (int i = 0; i < dimensions; ++i)
658 jint size = va_arg (args, jint);
660 throw new java::lang::NegativeArraySizeException;
665 return _Jv_NewMultiArrayUnchecked (array_type, dimensions, sizes);
670 // Ensure 8-byte alignment, for hash synchronization.
671 #define DECLARE_PRIM_TYPE(NAME) \
672 _Jv_ArrayVTable _Jv_##NAME##VTable; \
673 java::lang::Class _Jv_##NAME##Class __attribute__ ((aligned (8)));
675 DECLARE_PRIM_TYPE(byte)
676 DECLARE_PRIM_TYPE(short)
677 DECLARE_PRIM_TYPE(int)
678 DECLARE_PRIM_TYPE(long)
679 DECLARE_PRIM_TYPE(boolean)
680 DECLARE_PRIM_TYPE(char)
681 DECLARE_PRIM_TYPE(float)
682 DECLARE_PRIM_TYPE(double)
683 DECLARE_PRIM_TYPE(void)
686 _Jv_InitPrimClass (jclass cl, char *cname, char sig, int len,
687 _Jv_ArrayVTable *array_vtable)
689 using namespace java::lang::reflect;
691 // We must set the vtable for the class; the Java constructor
693 (*(_Jv_VTable **) cl) = java::lang::Class::class$.vtable;
695 // Initialize the fields we care about. We do this in the same
696 // order they are declared in Class.h.
697 cl->name = _Jv_makeUtf8Const ((char *) cname, -1);
698 cl->accflags = Modifier::PUBLIC | Modifier::FINAL | Modifier::ABSTRACT;
699 cl->method_count = sig;
700 cl->size_in_bytes = len;
701 cl->vtable = JV_PRIMITIVE_VTABLE;
702 cl->state = JV_STATE_DONE;
705 _Jv_NewArrayClass (cl, NULL, (_Jv_VTable *) array_vtable);
709 _Jv_FindClassFromSignature (char *sig, java::lang::ClassLoader *loader)
714 return JvPrimClass (byte);
716 return JvPrimClass (short);
718 return JvPrimClass (int);
720 return JvPrimClass (long);
722 return JvPrimClass (boolean);
724 return JvPrimClass (char);
726 return JvPrimClass (float);
728 return JvPrimClass (double);
730 return JvPrimClass (void);
734 for (i = 1; sig[i] && sig[i] != ';'; ++i)
736 _Jv_Utf8Const *name = _Jv_makeUtf8Const (&sig[1], i - 1);
737 return _Jv_FindClass (name, loader);
741 jclass klass = _Jv_FindClassFromSignature (&sig[1], loader);
744 return _Jv_GetArrayClass (klass, loader);
748 return NULL; // Placate compiler.
754 JvConvertArgv (int argc, const char **argv)
758 jobjectArray ar = JvNewObjectArray(argc, &StringClass, NULL);
759 jobject *ptr = elements(ar);
760 jbyteArray bytes = NULL;
761 for (int i = 0; i < argc; i++)
763 const char *arg = argv[i];
764 int len = strlen (arg);
765 if (bytes == NULL || bytes->length < len)
766 bytes = JvNewByteArray (len);
767 jbyte *bytePtr = elements (bytes);
768 // We assume jbyte == char.
769 memcpy (bytePtr, arg, len);
771 // Now convert using the default encoding.
772 *ptr++ = new java::lang::String (bytes, 0, len);
774 return (JArray<jstring>*) ar;
777 // FIXME: These variables are static so that they will be
778 // automatically scanned by the Boehm collector. This is needed
779 // because with qthreads the collector won't scan the initial stack --
780 // it will only scan the qthreads stacks.
782 // Command line arguments.
783 static JArray<jstring> *arg_vec;
785 // The primary thread.
786 static java::lang::Thread *main_thread;
788 #ifndef DISABLE_GETENV_PROPERTIES
791 next_property_key (char *s, size_t *length)
797 // Skip over whitespace
801 // If we've reached the end, return NULL. Also return NULL if for
802 // some reason we've come across a malformed property string.
808 // Determine the length of the property key.
826 next_property_value (char *s, size_t *length)
842 // If we've reached the end, return NULL.
846 // Determine the length of the property value.
865 process_gcj_properties ()
867 char *props = getenv("GCJ_PROPERTIES");
870 size_t property_count = 0;
875 // Whip through props quickly in order to count the number of
877 while (p && (p = next_property_key (p, &length)))
879 // Skip to the end of the key
882 p = next_property_value (p, &length);
889 // Allocate an array of property value/key pairs.
890 _Jv_Environment_Properties =
891 (property_pair *) malloc (sizeof(property_pair)
892 * (property_count + 1));
894 // Go through the properties again, initializing _Jv_Properties
898 while (p && (p = next_property_key (p, &length)))
900 _Jv_Environment_Properties[property_count].key = p;
901 _Jv_Environment_Properties[property_count].key_length = length;
903 // Skip to the end of the key
906 p = next_property_value (p, &length);
908 _Jv_Environment_Properties[property_count].value = p;
909 _Jv_Environment_Properties[property_count].value_length = length;
916 memset ((void *) &_Jv_Environment_Properties[property_count],
917 0, sizeof (property_pair));
921 // Null terminate the strings.
922 while (_Jv_Environment_Properties[i].key)
924 _Jv_Environment_Properties[i].key[_Jv_Environment_Properties[i].key_length] = 0;
925 _Jv_Environment_Properties[i++].value[_Jv_Environment_Properties[i].value_length] = 0;
929 #endif // DISABLE_GETENV_PROPERTIES
933 _Jv_Utf8Const *void_signature;
934 _Jv_Utf8Const *clinit_name;
935 _Jv_Utf8Const *init_name;
936 _Jv_Utf8Const *finit_name;
938 bool runtimeInitialized = false;
942 _Jv_CreateJavaVM (void* /*vm_args*/)
946 if (runtimeInitialized)
949 runtimeInitialized = true;
951 PROCESS_GCJ_PROPERTIES;
955 _Jv_InitializeSyncMutex ();
965 /* Initialize Utf8 constants declared in jvm.h. */
966 void_signature = _Jv_makeUtf8Const ("()V", 3);
967 clinit_name = _Jv_makeUtf8Const ("<clinit>", 8);
968 init_name = _Jv_makeUtf8Const ("<init>", 6);
969 finit_name = _Jv_makeUtf8Const ("finit$", 6);
971 /* Initialize built-in classes to represent primitive TYPEs. */
972 _Jv_InitPrimClass (&_Jv_byteClass, "byte", 'B', 1, &_Jv_byteVTable);
973 _Jv_InitPrimClass (&_Jv_shortClass, "short", 'S', 2, &_Jv_shortVTable);
974 _Jv_InitPrimClass (&_Jv_intClass, "int", 'I', 4, &_Jv_intVTable);
975 _Jv_InitPrimClass (&_Jv_longClass, "long", 'J', 8, &_Jv_longVTable);
976 _Jv_InitPrimClass (&_Jv_booleanClass, "boolean", 'Z', 1, &_Jv_booleanVTable);
977 _Jv_InitPrimClass (&_Jv_charClass, "char", 'C', 2, &_Jv_charVTable);
978 _Jv_InitPrimClass (&_Jv_floatClass, "float", 'F', 4, &_Jv_floatVTable);
979 _Jv_InitPrimClass (&_Jv_doubleClass, "double", 'D', 8, &_Jv_doubleVTable);
980 _Jv_InitPrimClass (&_Jv_voidClass, "void", 'V', 0, &_Jv_voidVTable);
982 // Turn stack trace generation off while creating exception objects.
983 _Jv_InitClass (&java::lang::VMThrowable::class$);
984 java::lang::VMThrowable::trace_enabled = 0;
986 // We have to initialize this fairly early, to avoid circular class
987 // initialization. In particular we want to start the
988 // initialization of ClassLoader before we start the initialization
990 _Jv_InitClass (&java::lang::ClassLoader::class$);
992 // Once the bootstrap loader is in place, change it into a kind of
993 // system loader, by having it read the class path.
994 gnu::gcj::runtime::VMClassLoader::initialize();
996 no_memory = new java::lang::OutOfMemoryError;
998 java::lang::VMThrowable::trace_enabled = 1;
1001 LTDL_SET_PRELOADED_SYMBOLS ();
1004 _Jv_platform_initialize ();
1008 _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady);
1010 // Start the GC finalizer thread. A VirtualMachineError can be
1011 // thrown by the runtime if, say, threads aren't available. In this
1012 // case finalizers simply won't run.
1015 using namespace gnu::gcj::runtime;
1016 FinalizerThread *ft = new FinalizerThread ();
1019 catch (java::lang::VirtualMachineError *ignore)
1027 _Jv_RunMain (jclass klass, const char *name, int argc, const char **argv,
1030 _Jv_SetArgs (argc, argv);
1032 java::lang::Runtime *runtime = NULL;
1036 // Set this very early so that it is seen when java.lang.System
1039 _Jv_Jar_Class_Path = strdup (name);
1040 _Jv_CreateJavaVM (NULL);
1042 // Get the Runtime here. We want to initialize it before searching
1043 // for `main'; that way it will be set up if `main' is a JNI method.
1044 runtime = java::lang::Runtime::getRuntime ();
1046 #ifdef DISABLE_MAIN_ARGS
1047 arg_vec = JvConvertArgv (0, 0);
1049 arg_vec = JvConvertArgv (argc - 1, argv + 1);
1052 using namespace gnu::java::lang;
1054 main_thread = new MainThread (klass, arg_vec);
1056 main_thread = new MainThread (JvNewStringLatin1 (name),
1059 catch (java::lang::Throwable *t)
1061 java::lang::System::err->println (JvNewStringLatin1
1062 ("Exception during runtime initialization"));
1063 t->printStackTrace();
1067 _Jv_AttachCurrentThread (main_thread);
1068 _Jv_ThreadRun (main_thread);
1071 int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
1072 runtime->exit (status);
1076 JvRunMain (jclass klass, int argc, const char **argv)
1078 _Jv_RunMain (klass, NULL, argc, argv, false);
1083 // Parse a string and return a heap size.
1085 parse_heap_size (const char *spec)
1088 unsigned long val = strtoul (spec, &end, 10);
1089 if (*end == 'k' || *end == 'K')
1091 else if (*end == 'm' || *end == 'M')
1093 return (size_t) val;
1096 // Set the initial heap size. This might be ignored by the GC layer.
1097 // This must be called before _Jv_RunMain.
1099 _Jv_SetInitialHeapSize (const char *arg)
1101 size_t size = parse_heap_size (arg);
1102 _Jv_GCSetInitialHeapSize (size);
1105 // Set the maximum heap size. This might be ignored by the GC layer.
1106 // This must be called before _Jv_RunMain.
1108 _Jv_SetMaximumHeapSize (const char *arg)
1110 size_t size = parse_heap_size (arg);
1111 _Jv_GCSetMaximumHeapSize (size);
1117 _Jv_Malloc (jsize size)
1119 if (__builtin_expect (size == 0, false))
1121 void *ptr = malloc ((size_t) size);
1122 if (__builtin_expect (ptr == NULL, false))
1128 _Jv_Realloc (void *ptr, jsize size)
1130 if (__builtin_expect (size == 0, false))
1132 ptr = realloc (ptr, (size_t) size);
1133 if (__builtin_expect (ptr == NULL, false))
1139 _Jv_MallocUnchecked (jsize size)
1141 if (__builtin_expect (size == 0, false))
1143 return malloc ((size_t) size);
1147 _Jv_Free (void* ptr)
1154 // In theory, these routines can be #ifdef'd away on machines which
1155 // support divide overflow signals. However, we never know if some
1156 // code might have been compiled with "-fuse-divide-subroutine", so we
1157 // always include them in libgcj.
1160 _Jv_divI (jint dividend, jint divisor)
1162 if (__builtin_expect (divisor == 0, false))
1164 java::lang::ArithmeticException *arithexception
1165 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1166 throw arithexception;
1169 if (dividend == (jint) 0x80000000L && divisor == -1)
1172 return dividend / divisor;
1176 _Jv_remI (jint dividend, jint divisor)
1178 if (__builtin_expect (divisor == 0, false))
1180 java::lang::ArithmeticException *arithexception
1181 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1182 throw arithexception;
1185 if (dividend == (jint) 0x80000000L && divisor == -1)
1188 return dividend % divisor;
1192 _Jv_divJ (jlong dividend, jlong divisor)
1194 if (__builtin_expect (divisor == 0, false))
1196 java::lang::ArithmeticException *arithexception
1197 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1198 throw arithexception;
1201 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1204 return dividend / divisor;
1208 _Jv_remJ (jlong dividend, jlong divisor)
1210 if (__builtin_expect (divisor == 0, false))
1212 java::lang::ArithmeticException *arithexception
1213 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1214 throw arithexception;
1217 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1220 return dividend % divisor;
1225 // Return true if SELF_KLASS can access a field or method in
1226 // OTHER_KLASS. The field or method's access flags are specified in
1229 _Jv_CheckAccess (jclass self_klass, jclass other_klass, jint flags)
1231 using namespace java::lang::reflect;
1232 return ((self_klass == other_klass)
1233 || ((flags & Modifier::PUBLIC) != 0)
1234 || (((flags & Modifier::PROTECTED) != 0)
1235 && other_klass->isAssignableFrom (self_klass))
1236 || (((flags & Modifier::PRIVATE) == 0)
1237 && _Jv_ClassNameSamePackage (self_klass->name,
1238 other_klass->name)));