1 // prims.cc - Code for core of runtime environment.
3 /* Copyright (C) 1998, 1999, 2000, 2001, 2002 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/gcj/runtime/FirstThread.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 // Largest representable size_t.
74 #define SIZE_T_MAX ((size_t) (~ (size_t) 0))
76 static const char *no_properties[] = { NULL };
78 // Properties set at compile time.
79 const char **_Jv_Compiler_Properties = no_properties;
81 // The JAR file to add to the beginning of java.class.path.
82 const char *_Jv_Jar_Class_Path;
84 #ifndef DISABLE_GETENV_PROPERTIES
85 // Property key/value pairs.
86 property_pair *_Jv_Environment_Properties;
89 // Stash the argv pointer to benefit native libraries that need it.
90 const char **_Jv_argv;
94 // Pointer to JVMPI notification functions.
95 void (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (JVMPI_Event *event);
96 void (*_Jv_JVMPI_Notify_THREAD_START) (JVMPI_Event *event);
97 void (*_Jv_JVMPI_Notify_THREAD_END) (JVMPI_Event *event);
101 extern "C" void _Jv_ThrowSignal (jthrowable) __attribute ((noreturn));
103 // Just like _Jv_Throw, but fill in the stack trace first. Although
104 // this is declared extern in order that its name not be mangled, it
105 // is not intended to be used outside this file.
107 _Jv_ThrowSignal (jthrowable throwable)
109 throwable->fillInStackTrace ();
114 static java::lang::NullPointerException *nullp;
116 SIGNAL_HANDLER (catch_segv)
118 MAKE_THROW_FRAME (nullp);
119 _Jv_ThrowSignal (nullp);
123 static java::lang::ArithmeticException *arithexception;
126 SIGNAL_HANDLER (catch_fpe)
128 #ifdef HANDLE_DIVIDE_OVERFLOW
129 HANDLE_DIVIDE_OVERFLOW;
131 MAKE_THROW_FRAME (arithexception);
133 _Jv_ThrowSignal (arithexception);
140 _Jv_equalUtf8Consts (Utf8Const* a, Utf8Const *b)
143 _Jv_ushort *aptr, *bptr;
146 if (a->hash != b->hash)
149 if (b->length != len)
151 aptr = (_Jv_ushort *)a->data;
152 bptr = (_Jv_ushort *)b->data;
153 len = (len + 1) >> 1;
155 if (*aptr++ != *bptr++)
160 /* True iff A is equal to STR.
161 HASH is STR->hashCode().
165 _Jv_equal (Utf8Const* a, jstring str, jint hash)
167 if (a->hash != (_Jv_ushort) hash)
169 jint len = str->length();
171 jchar *sptr = _Jv_GetStringChars (str);
172 unsigned char* ptr = (unsigned char*) a->data;
173 unsigned char* limit = ptr + a->length;
176 int ch = UTF8_GET (ptr, limit);
185 /* Like _Jv_equal, but stop after N characters. */
187 _Jv_equaln (Utf8Const *a, jstring str, jint n)
189 jint len = str->length();
191 jchar *sptr = _Jv_GetStringChars (str);
192 unsigned char* ptr = (unsigned char*) a->data;
193 unsigned char* limit = ptr + a->length;
194 for (; n-- > 0; i++, sptr++)
196 int ch = UTF8_GET (ptr, limit);
205 /* Count the number of Unicode chars encoded in a given Ut8 string. */
207 _Jv_strLengthUtf8(char* str, int len)
210 unsigned char* limit;
213 ptr = (unsigned char*) str;
216 for (; ptr < limit; str_length++)
218 if (UTF8_GET (ptr, limit) < 0)
224 /* Calculate a hash value for a string encoded in Utf8 format.
225 * This returns the same hash value as specified or java.lang.String.hashCode.
228 hashUtf8String (char* str, int len)
230 unsigned char* ptr = (unsigned char*) str;
231 unsigned char* limit = ptr + len;
236 int ch = UTF8_GET (ptr, limit);
237 /* Updated specification from
238 http://www.javasoft.com/docs/books/jls/clarify.html. */
239 hash = (31 * hash) + ch;
245 _Jv_makeUtf8Const (char* s, int len)
249 Utf8Const* m = (Utf8Const*) _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
250 memcpy (m->data, s, len);
253 m->hash = hashUtf8String (s, len) & 0xFFFF;
258 _Jv_makeUtf8Const (jstring string)
260 jint hash = string->hashCode ();
261 jint len = _Jv_GetStringUTFLength (string);
263 Utf8Const* m = (Utf8Const*)
264 _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
269 _Jv_GetStringUTFRegion (string, 0, string->length (), m->data);
279 _Jv_Abort (const char *function, const char *file, int line,
283 _Jv_Abort (const char *, const char *, int, const char *message)
288 "libgcj failure: %s\n in function %s, file %s, line %d\n",
289 message, function, file, line);
291 fprintf (stderr, "libgcj failure: %s\n", message);
297 fail_on_finalization (jobject)
299 JvFail ("object was finalized");
303 _Jv_GCWatch (jobject obj)
305 _Jv_RegisterFinalizer (obj, fail_on_finalization);
309 _Jv_ThrowBadArrayIndex(jint bad_index)
311 throw new java::lang::ArrayIndexOutOfBoundsException
312 (java::lang::String::valueOf (bad_index));
316 _Jv_ThrowNullPointerException ()
318 throw new java::lang::NullPointerException;
321 // Explicitly throw a no memory exception.
322 // The collector calls this when it encounters an out-of-memory condition.
323 void _Jv_ThrowNoMemory()
330 jvmpi_notify_alloc(jclass klass, jint size, jobject obj)
332 // Service JVMPI allocation request.
333 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
337 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
339 event.u.obj_alloc.arena_id = 0;
340 event.u.obj_alloc.class_id = (jobjectID) klass;
341 event.u.obj_alloc.is_array = 0;
342 event.u.obj_alloc.size = size;
343 event.u.obj_alloc.obj_id = (jobjectID) obj;
345 // FIXME: This doesn't look right for the Boehm GC. A GC may
346 // already be in progress. _Jv_DisableGC () doesn't wait for it.
347 // More importantly, I don't see the need for disabling GC, since we
348 // blatantly have a pointer to obj on our stack, ensuring that the
349 // object can't be collected. Even for a nonconservative collector,
350 // it appears to me that this must be true, since we are about to
351 // return obj. Isn't this whole approach way too intrusive for
352 // a useful profiling interface? - HB
354 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
358 #else /* !ENABLE_JVMPI */
359 # define jvmpi_notify_alloc(klass,size,obj) /* do nothing */
362 // Allocate a new object of class KLASS. SIZE is the size of the object
363 // to allocate. You might think this is redundant, but it isn't; some
364 // classes, such as String, aren't of fixed size.
365 // First a version that assumes that we have no finalizer, and that
366 // the class is already initialized.
367 // If we know that JVMPI is disabled, this can be replaced by a direct call
368 // to the allocator for the appropriate GC.
370 _Jv_AllocObjectNoInitNoFinalizer (jclass klass, jint size)
372 jobject obj = (jobject) _Jv_AllocObj (size, klass);
373 jvmpi_notify_alloc (klass, size, obj);
377 // And now a version that initializes if necessary.
379 _Jv_AllocObjectNoFinalizer (jclass klass, jint size)
381 _Jv_InitClass (klass);
382 jobject obj = (jobject) _Jv_AllocObj (size, klass);
383 jvmpi_notify_alloc (klass, size, obj);
387 // And now the general version that registers a finalizer if necessary.
389 _Jv_AllocObject (jclass klass, jint size)
391 jobject obj = _Jv_AllocObjectNoFinalizer (klass, size);
393 // We assume that the compiler only generates calls to this routine
394 // if there really is an interesting finalizer.
395 // Unfortunately, we still have to the dynamic test, since there may
396 // be cni calls to this routine.
397 // Note that on IA64 get_finalizer() returns the starting address of the
398 // function, not a function pointer. Thus this still works.
399 if (klass->vtable->get_finalizer ()
400 != java::lang::Object::class$.vtable->get_finalizer ())
401 _Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
405 // A version of the above that assumes the object contains no pointers,
406 // and requires no finalization. This can't happen if we need pointers
408 #ifdef JV_HASH_SYNCHRONIZATION
410 _Jv_AllocPtrFreeObject (jclass klass, jint size)
412 _Jv_InitClass (klass);
414 jobject obj = (jobject) _Jv_AllocPtrFreeObj (size, klass);
417 // Service JVMPI request.
419 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
423 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
425 event.u.obj_alloc.arena_id = 0;
426 event.u.obj_alloc.class_id = (jobjectID) klass;
427 event.u.obj_alloc.is_array = 0;
428 event.u.obj_alloc.size = size;
429 event.u.obj_alloc.obj_id = (jobjectID) obj;
432 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
439 #endif /* JV_HASH_SYNCHRONIZATION */
442 // Allocate a new array of Java objects. Each object is of type
443 // `elementClass'. `init' is used to initialize each slot in the
446 _Jv_NewObjectArray (jsize count, jclass elementClass, jobject init)
448 if (__builtin_expect (count < 0, false))
449 throw new java::lang::NegativeArraySizeException;
451 JvAssert (! elementClass->isPrimitive ());
453 // Ensure that elements pointer is properly aligned.
454 jobjectArray obj = NULL;
455 size_t size = (size_t) elements (obj);
456 size += count * sizeof (jobject);
458 jclass klass = _Jv_GetArrayClass (elementClass,
459 elementClass->getClassLoaderInternal());
461 obj = (jobjectArray) _Jv_AllocArray (size, klass);
463 jsize *lp = const_cast<jsize *> (&obj->length);
465 // We know the allocator returns zeroed memory. So don't bother
469 jobject *ptr = elements(obj);
476 // Allocate a new array of primitives. ELTYPE is the type of the
477 // element, COUNT is the size of the array.
479 _Jv_NewPrimArray (jclass eltype, jint count)
481 int elsize = eltype->size();
482 if (__builtin_expect (count < 0, false))
483 throw new java::lang::NegativeArraySizeException;
485 JvAssert (eltype->isPrimitive ());
486 jobject dummy = NULL;
487 size_t size = (size_t) _Jv_GetArrayElementFromElementType (dummy, eltype);
489 // Check for overflow.
490 if (__builtin_expect ((size_t) count >
491 (SIZE_T_MAX - size) / elsize, false))
494 jclass klass = _Jv_GetArrayClass (eltype, 0);
496 # ifdef JV_HASH_SYNCHRONIZATION
497 // Since the vtable is always statically allocated,
498 // these are completely pointerfree! Make sure the GC doesn't touch them.
500 (__JArray*) _Jv_AllocPtrFreeObj (size + elsize * count, klass);
501 memset((char *)arr + size, 0, elsize * count);
503 __JArray *arr = (__JArray*) _Jv_AllocObj (size + elsize * count, klass);
504 // Note that we assume we are given zeroed memory by the allocator.
507 jsize *lp = const_cast<jsize *> (&arr->length);
514 _Jv_NewArray (jint type, jint size)
518 case 4: return JvNewBooleanArray (size);
519 case 5: return JvNewCharArray (size);
520 case 6: return JvNewFloatArray (size);
521 case 7: return JvNewDoubleArray (size);
522 case 8: return JvNewByteArray (size);
523 case 9: return JvNewShortArray (size);
524 case 10: return JvNewIntArray (size);
525 case 11: return JvNewLongArray (size);
527 throw new java::lang::InternalError
528 (JvNewStringLatin1 ("invalid type code in _Jv_NewArray"));
531 // Allocate a possibly multi-dimensional array but don't check that
532 // any array length is <0.
534 _Jv_NewMultiArrayUnchecked (jclass type, jint dimensions, jint *sizes)
536 JvAssert (type->isArray());
537 jclass element_type = type->getComponentType();
539 if (element_type->isPrimitive())
540 result = _Jv_NewPrimArray (element_type, sizes[0]);
542 result = _Jv_NewObjectArray (sizes[0], element_type, NULL);
546 JvAssert (! element_type->isPrimitive());
547 JvAssert (element_type->isArray());
548 jobject *contents = elements ((jobjectArray) result);
549 for (int i = 0; i < sizes[0]; ++i)
550 contents[i] = _Jv_NewMultiArrayUnchecked (element_type, dimensions - 1,
558 _Jv_NewMultiArray (jclass type, jint dimensions, jint *sizes)
560 for (int i = 0; i < dimensions; ++i)
562 throw new java::lang::NegativeArraySizeException;
564 return _Jv_NewMultiArrayUnchecked (type, dimensions, sizes);
568 _Jv_NewMultiArray (jclass array_type, jint dimensions, ...)
571 jint sizes[dimensions];
572 va_start (args, dimensions);
573 for (int i = 0; i < dimensions; ++i)
575 jint size = va_arg (args, jint);
577 throw new java::lang::NegativeArraySizeException;
582 return _Jv_NewMultiArrayUnchecked (array_type, dimensions, sizes);
587 // Ensure 8-byte alignment, for hash synchronization.
588 #define DECLARE_PRIM_TYPE(NAME) \
589 _Jv_ArrayVTable _Jv_##NAME##VTable; \
590 java::lang::Class _Jv_##NAME##Class __attribute__ ((aligned (8)));
592 DECLARE_PRIM_TYPE(byte)
593 DECLARE_PRIM_TYPE(short)
594 DECLARE_PRIM_TYPE(int)
595 DECLARE_PRIM_TYPE(long)
596 DECLARE_PRIM_TYPE(boolean)
597 DECLARE_PRIM_TYPE(char)
598 DECLARE_PRIM_TYPE(float)
599 DECLARE_PRIM_TYPE(double)
600 DECLARE_PRIM_TYPE(void)
603 _Jv_InitPrimClass (jclass cl, char *cname, char sig, int len,
604 _Jv_ArrayVTable *array_vtable)
606 using namespace java::lang::reflect;
608 _Jv_InitNewClassFields (cl);
610 // We must set the vtable for the class; the Java constructor
612 (*(_Jv_VTable **) cl) = java::lang::Class::class$.vtable;
614 // Initialize the fields we care about. We do this in the same
615 // order they are declared in Class.h.
616 cl->name = _Jv_makeUtf8Const ((char *) cname, -1);
617 cl->accflags = Modifier::PUBLIC | Modifier::FINAL | Modifier::ABSTRACT;
618 cl->method_count = sig;
619 cl->size_in_bytes = len;
620 cl->vtable = JV_PRIMITIVE_VTABLE;
621 cl->state = JV_STATE_DONE;
624 _Jv_NewArrayClass (cl, NULL, (_Jv_VTable *) array_vtable);
628 _Jv_FindClassFromSignature (char *sig, java::lang::ClassLoader *loader)
633 return JvPrimClass (byte);
635 return JvPrimClass (short);
637 return JvPrimClass (int);
639 return JvPrimClass (long);
641 return JvPrimClass (boolean);
643 return JvPrimClass (char);
645 return JvPrimClass (float);
647 return JvPrimClass (double);
649 return JvPrimClass (void);
653 for (i = 1; sig[i] && sig[i] != ';'; ++i)
655 _Jv_Utf8Const *name = _Jv_makeUtf8Const (&sig[1], i - 1);
656 return _Jv_FindClass (name, loader);
660 jclass klass = _Jv_FindClassFromSignature (&sig[1], loader);
663 return _Jv_GetArrayClass (klass, loader);
667 return NULL; // Placate compiler.
673 JvConvertArgv (int argc, const char **argv)
677 jobjectArray ar = JvNewObjectArray(argc, &StringClass, NULL);
678 jobject *ptr = elements(ar);
679 jbyteArray bytes = NULL;
680 for (int i = 0; i < argc; i++)
682 const char *arg = argv[i];
683 int len = strlen (arg);
684 if (bytes == NULL || bytes->length < len)
685 bytes = JvNewByteArray (len);
686 jbyte *bytePtr = elements (bytes);
687 // We assume jbyte == char.
688 memcpy (bytePtr, arg, len);
690 // Now convert using the default encoding.
691 *ptr++ = new java::lang::String (bytes, 0, len);
693 return (JArray<jstring>*) ar;
696 // FIXME: These variables are static so that they will be
697 // automatically scanned by the Boehm collector. This is needed
698 // because with qthreads the collector won't scan the initial stack --
699 // it will only scan the qthreads stacks.
701 // Command line arguments.
702 static JArray<jstring> *arg_vec;
704 // The primary thread.
705 static java::lang::Thread *main_thread;
707 #ifndef DISABLE_GETENV_PROPERTIES
710 next_property_key (char *s, size_t *length)
716 // Skip over whitespace
720 // If we've reached the end, return NULL. Also return NULL if for
721 // some reason we've come across a malformed property string.
727 // Determine the length of the property key.
745 next_property_value (char *s, size_t *length)
761 // If we've reached the end, return NULL.
765 // Determine the length of the property value.
784 process_gcj_properties ()
786 char *props = getenv("GCJ_PROPERTIES");
789 size_t property_count = 0;
794 // Whip through props quickly in order to count the number of
796 while (p && (p = next_property_key (p, &length)))
798 // Skip to the end of the key
801 p = next_property_value (p, &length);
808 // Allocate an array of property value/key pairs.
809 _Jv_Environment_Properties =
810 (property_pair *) malloc (sizeof(property_pair)
811 * (property_count + 1));
813 // Go through the properties again, initializing _Jv_Properties
817 while (p && (p = next_property_key (p, &length)))
819 _Jv_Environment_Properties[property_count].key = p;
820 _Jv_Environment_Properties[property_count].key_length = length;
822 // Skip to the end of the key
825 p = next_property_value (p, &length);
827 _Jv_Environment_Properties[property_count].value = p;
828 _Jv_Environment_Properties[property_count].value_length = length;
835 memset ((void *) &_Jv_Environment_Properties[property_count],
836 0, sizeof (property_pair));
840 // Null terminate the strings.
841 while (_Jv_Environment_Properties[i].key)
843 _Jv_Environment_Properties[i].key[_Jv_Environment_Properties[i].key_length] = 0;
844 _Jv_Environment_Properties[i++].value[_Jv_Environment_Properties[i].value_length] = 0;
848 #endif // DISABLE_GETENV_PROPERTIES
852 _Jv_Utf8Const *void_signature;
853 _Jv_Utf8Const *clinit_name;
854 _Jv_Utf8Const *init_name;
855 _Jv_Utf8Const *finit_name;
857 bool runtimeInitialized = false;
861 _Jv_CreateJavaVM (void* /*vm_args*/)
865 if (runtimeInitialized)
868 runtimeInitialized = true;
870 PROCESS_GCJ_PROPERTIES;
874 _Jv_InitializeSyncMutex ();
876 /* Initialize Utf8 constants declared in jvm.h. */
877 void_signature = _Jv_makeUtf8Const ("()V", 3);
878 clinit_name = _Jv_makeUtf8Const ("<clinit>", 8);
879 init_name = _Jv_makeUtf8Const ("<init>", 6);
880 finit_name = _Jv_makeUtf8Const ("finit$", 6);
882 /* Initialize built-in classes to represent primitive TYPEs. */
883 _Jv_InitPrimClass (&_Jv_byteClass, "byte", 'B', 1, &_Jv_byteVTable);
884 _Jv_InitPrimClass (&_Jv_shortClass, "short", 'S', 2, &_Jv_shortVTable);
885 _Jv_InitPrimClass (&_Jv_intClass, "int", 'I', 4, &_Jv_intVTable);
886 _Jv_InitPrimClass (&_Jv_longClass, "long", 'J', 8, &_Jv_longVTable);
887 _Jv_InitPrimClass (&_Jv_booleanClass, "boolean", 'Z', 1, &_Jv_booleanVTable);
888 _Jv_InitPrimClass (&_Jv_charClass, "char", 'C', 2, &_Jv_charVTable);
889 _Jv_InitPrimClass (&_Jv_floatClass, "float", 'F', 4, &_Jv_floatVTable);
890 _Jv_InitPrimClass (&_Jv_doubleClass, "double", 'D', 8, &_Jv_doubleVTable);
891 _Jv_InitPrimClass (&_Jv_voidClass, "void", 'V', 0, &_Jv_voidVTable);
893 // Turn stack trace generation off while creating exception objects.
894 _Jv_InitClass (&java::lang::VMThrowable::class$);
895 java::lang::VMThrowable::trace_enabled = 0;
901 arithexception = new java::lang::ArithmeticException
902 (JvNewStringLatin1 ("/ by zero"));
905 no_memory = new java::lang::OutOfMemoryError;
907 java::lang::VMThrowable::trace_enabled = 1;
910 LTDL_SET_PRELOADED_SYMBOLS ();
913 _Jv_platform_initialize ();
917 _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady);
919 // Start the GC finalizer thread. A VirtualMachineError can be
920 // thrown by the runtime if, say, threads aren't available. In this
921 // case finalizers simply won't run.
924 using namespace gnu::gcj::runtime;
925 FinalizerThread *ft = new FinalizerThread ();
928 catch (java::lang::VirtualMachineError *ignore)
936 _Jv_RunMain (jclass klass, const char *name, int argc, const char **argv,
942 java::lang::Runtime *runtime = NULL;
946 // Set this very early so that it is seen when java.lang.System
949 _Jv_Jar_Class_Path = strdup (name);
950 _Jv_CreateJavaVM (NULL);
952 // Get the Runtime here. We want to initialize it before searching
953 // for `main'; that way it will be set up if `main' is a JNI method.
954 runtime = java::lang::Runtime::getRuntime ();
956 #ifdef DISABLE_MAIN_ARGS
957 arg_vec = JvConvertArgv (0, 0);
959 arg_vec = JvConvertArgv (argc - 1, argv + 1);
962 using namespace gnu::gcj::runtime;
964 main_thread = new FirstThread (klass, arg_vec);
966 main_thread = new FirstThread (JvNewStringLatin1 (name),
969 catch (java::lang::Throwable *t)
971 java::lang::System::err->println (JvNewStringLatin1
972 ("Exception during runtime initialization"));
973 t->printStackTrace();
977 _Jv_AttachCurrentThread (main_thread);
978 _Jv_ThreadRun (main_thread);
981 int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
982 runtime->exit (status);
986 JvRunMain (jclass klass, int argc, const char **argv)
988 _Jv_RunMain (klass, NULL, argc, argv, false);
993 // Parse a string and return a heap size.
995 parse_heap_size (const char *spec)
998 unsigned long val = strtoul (spec, &end, 10);
999 if (*end == 'k' || *end == 'K')
1001 else if (*end == 'm' || *end == 'M')
1003 return (size_t) val;
1006 // Set the initial heap size. This might be ignored by the GC layer.
1007 // This must be called before _Jv_RunMain.
1009 _Jv_SetInitialHeapSize (const char *arg)
1011 size_t size = parse_heap_size (arg);
1012 _Jv_GCSetInitialHeapSize (size);
1015 // Set the maximum heap size. This might be ignored by the GC layer.
1016 // This must be called before _Jv_RunMain.
1018 _Jv_SetMaximumHeapSize (const char *arg)
1020 size_t size = parse_heap_size (arg);
1021 _Jv_GCSetMaximumHeapSize (size);
1027 _Jv_Malloc (jsize size)
1029 if (__builtin_expect (size == 0, false))
1031 void *ptr = malloc ((size_t) size);
1032 if (__builtin_expect (ptr == NULL, false))
1038 _Jv_Realloc (void *ptr, jsize size)
1040 if (__builtin_expect (size == 0, false))
1042 ptr = realloc (ptr, (size_t) size);
1043 if (__builtin_expect (ptr == NULL, false))
1049 _Jv_MallocUnchecked (jsize size)
1051 if (__builtin_expect (size == 0, false))
1053 return malloc ((size_t) size);
1057 _Jv_Free (void* ptr)
1064 // In theory, these routines can be #ifdef'd away on machines which
1065 // support divide overflow signals. However, we never know if some
1066 // code might have been compiled with "-fuse-divide-subroutine", so we
1067 // always include them in libgcj.
1070 _Jv_divI (jint dividend, jint divisor)
1072 if (__builtin_expect (divisor == 0, false))
1073 _Jv_ThrowSignal (arithexception);
1075 if (dividend == (jint) 0x80000000L && divisor == -1)
1078 return dividend / divisor;
1082 _Jv_remI (jint dividend, jint divisor)
1084 if (__builtin_expect (divisor == 0, false))
1085 _Jv_ThrowSignal (arithexception);
1087 if (dividend == (jint) 0x80000000L && divisor == -1)
1090 return dividend % divisor;
1094 _Jv_divJ (jlong dividend, jlong divisor)
1096 if (__builtin_expect (divisor == 0, false))
1097 _Jv_ThrowSignal (arithexception);
1099 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1102 return dividend / divisor;
1106 _Jv_remJ (jlong dividend, jlong divisor)
1108 if (__builtin_expect (divisor == 0, false))
1109 _Jv_ThrowSignal (arithexception);
1111 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1114 return dividend % divisor;