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>
28 #include <java-interp.h>
32 #include <java/lang/ThreadGroup.h>
35 #ifndef DISABLE_GETENV_PROPERTIES
37 #include <java-props.h>
38 #define PROCESS_GCJ_PROPERTIES process_gcj_properties()
40 #define PROCESS_GCJ_PROPERTIES
41 #endif // DISABLE_GETENV_PROPERTIES
43 #include <java/lang/Class.h>
44 #include <java/lang/ClassLoader.h>
45 #include <java/lang/Runtime.h>
46 #include <java/lang/String.h>
47 #include <java/lang/Thread.h>
48 #include <java/lang/ThreadGroup.h>
49 #include <java/lang/ArrayIndexOutOfBoundsException.h>
50 #include <java/lang/ArithmeticException.h>
51 #include <java/lang/ClassFormatError.h>
52 #include <java/lang/InternalError.h>
53 #include <java/lang/NegativeArraySizeException.h>
54 #include <java/lang/NullPointerException.h>
55 #include <java/lang/OutOfMemoryError.h>
56 #include <java/lang/System.h>
57 #include <java/lang/VMThrowable.h>
58 #include <java/lang/reflect/Modifier.h>
59 #include <java/io/PrintStream.h>
60 #include <java/lang/UnsatisfiedLinkError.h>
61 #include <java/lang/VirtualMachineError.h>
62 #include <gnu/gcj/runtime/VMClassLoader.h>
63 #include <gnu/gcj/runtime/FinalizerThread.h>
64 #include <gnu/java/lang/MainThread.h>
70 // We allocate a single OutOfMemoryError exception which we keep
71 // around for use if we run out of memory.
72 static java::lang::OutOfMemoryError *no_memory;
74 // Number of bytes in largest array object we create. This could be
75 // increased to the largest size_t value, so long as the appropriate
76 // functions are changed to take a size_t argument instead of jint.
77 #define MAX_OBJECT_SIZE ((1<<31) - 1)
79 static const char *no_properties[] = { NULL };
81 // Properties set at compile time.
82 const char **_Jv_Compiler_Properties = no_properties;
84 // The JAR file to add to the beginning of java.class.path.
85 const char *_Jv_Jar_Class_Path;
87 #ifndef DISABLE_GETENV_PROPERTIES
88 // Property key/value pairs.
89 property_pair *_Jv_Environment_Properties;
92 // Stash the argv pointer to benefit native libraries that need it.
93 const char **_Jv_argv;
100 // _Jv_argc is 0 if not explicitly initialized.
105 _Jv_GetSafeArg (int index)
107 if (index >=0 && index < _Jv_GetNbArgs ())
108 return _Jv_argv[index];
114 _Jv_SetArgs (int argc, const char **argv)
121 // Pointer to JVMPI notification functions.
122 void (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (JVMPI_Event *event);
123 void (*_Jv_JVMPI_Notify_THREAD_START) (JVMPI_Event *event);
124 void (*_Jv_JVMPI_Notify_THREAD_END) (JVMPI_Event *event);
128 #if defined (HANDLE_SEGV) || defined(HANDLE_FPE)
129 /* Unblock a signal. Unless we do this, the signal may only be sent
132 unblock_signal (int signum __attribute__ ((__unused__)))
134 #ifdef _POSIX_VERSION
138 sigaddset (&sigs, signum);
139 sigprocmask (SIG_UNBLOCK, &sigs, NULL);
145 SIGNAL_HANDLER (catch_segv)
147 java::lang::NullPointerException *nullp
148 = new java::lang::NullPointerException;
149 unblock_signal (SIGSEGV);
150 MAKE_THROW_FRAME (nullp);
156 SIGNAL_HANDLER (catch_fpe)
158 java::lang::ArithmeticException *arithexception
159 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
160 unblock_signal (SIGFPE);
161 #ifdef HANDLE_DIVIDE_OVERFLOW
162 HANDLE_DIVIDE_OVERFLOW;
164 MAKE_THROW_FRAME (arithexception);
166 throw arithexception;
173 _Jv_equalUtf8Consts (const Utf8Const* a, const Utf8Const *b)
176 const _Jv_ushort *aptr, *bptr;
179 if (a->hash != b->hash)
182 if (b->length != len)
184 aptr = (const _Jv_ushort *)a->data;
185 bptr = (const _Jv_ushort *)b->data;
186 len = (len + 1) >> 1;
188 if (*aptr++ != *bptr++)
193 /* True iff A is equal to STR.
194 HASH is STR->hashCode().
198 _Jv_equal (Utf8Const* a, jstring str, jint hash)
200 if (a->hash != (_Jv_ushort) hash)
202 jint len = str->length();
204 jchar *sptr = _Jv_GetStringChars (str);
205 unsigned char* ptr = (unsigned char*) a->data;
206 unsigned char* limit = ptr + a->length;
209 int ch = UTF8_GET (ptr, limit);
218 /* Like _Jv_equal, but stop after N characters. */
220 _Jv_equaln (Utf8Const *a, jstring str, jint n)
222 jint len = str->length();
224 jchar *sptr = _Jv_GetStringChars (str);
225 unsigned char* ptr = (unsigned char*) a->data;
226 unsigned char* limit = ptr + a->length;
227 for (; n-- > 0; i++, sptr++)
229 int ch = UTF8_GET (ptr, limit);
238 /* Count the number of Unicode chars encoded in a given Ut8 string. */
240 _Jv_strLengthUtf8(char* str, int len)
243 unsigned char* limit;
246 ptr = (unsigned char*) str;
249 for (; ptr < limit; str_length++)
251 if (UTF8_GET (ptr, limit) < 0)
257 /* Calculate a hash value for a string encoded in Utf8 format.
258 * This returns the same hash value as specified or java.lang.String.hashCode.
261 _Jv_hashUtf8String (char* str, int len)
263 unsigned char* ptr = (unsigned char*) str;
264 unsigned char* limit = ptr + len;
269 int ch = UTF8_GET (ptr, limit);
270 /* Updated specification from
271 http://www.javasoft.com/docs/books/jls/clarify.html. */
272 hash = (31 * hash) + ch;
278 _Jv_Utf8Const::init(char *s, int len)
280 ::memcpy (data, s, len);
283 hash = _Jv_hashUtf8String (s, len) & 0xFFFF;
287 _Jv_makeUtf8Const (char* s, int len)
292 = (Utf8Const*) _Jv_AllocBytes (_Jv_Utf8Const::space_needed(s, len));
298 _Jv_makeUtf8Const (jstring string)
300 jint hash = string->hashCode ();
301 jint len = _Jv_GetStringUTFLength (string);
303 Utf8Const* m = (Utf8Const*)
304 _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
309 _Jv_GetStringUTFRegion (string, 0, string->length (), m->data);
319 _Jv_Abort (const char *function, const char *file, int line,
323 _Jv_Abort (const char *, const char *, int, const char *message)
328 "libgcj failure: %s\n in function %s, file %s, line %d\n",
329 message, function, file, line);
331 fprintf (stderr, "libgcj failure: %s\n", message);
337 fail_on_finalization (jobject)
339 JvFail ("object was finalized");
343 _Jv_GCWatch (jobject obj)
345 _Jv_RegisterFinalizer (obj, fail_on_finalization);
349 _Jv_ThrowBadArrayIndex(jint bad_index)
351 throw new java::lang::ArrayIndexOutOfBoundsException
352 (java::lang::String::valueOf (bad_index));
356 _Jv_ThrowNullPointerException ()
358 throw new java::lang::NullPointerException;
361 // Explicitly throw a no memory exception.
362 // The collector calls this when it encounters an out-of-memory condition.
363 void _Jv_ThrowNoMemory()
369 # define JVMPI_NOTIFY_ALLOC(klass,size,obj) \
370 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false)) \
371 jvmpi_notify_alloc(klass,size,obj);
373 jvmpi_notify_alloc(jclass klass, jint size, jobject obj)
375 // Service JVMPI allocation request.
378 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
380 event.u.obj_alloc.arena_id = 0;
381 event.u.obj_alloc.class_id = (jobjectID) klass;
382 event.u.obj_alloc.is_array = 0;
383 event.u.obj_alloc.size = size;
384 event.u.obj_alloc.obj_id = (jobjectID) obj;
386 // FIXME: This doesn't look right for the Boehm GC. A GC may
387 // already be in progress. _Jv_DisableGC () doesn't wait for it.
388 // More importantly, I don't see the need for disabling GC, since we
389 // blatantly have a pointer to obj on our stack, ensuring that the
390 // object can't be collected. Even for a nonconservative collector,
391 // it appears to me that this must be true, since we are about to
392 // return obj. Isn't this whole approach way too intrusive for
393 // a useful profiling interface? - HB
395 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
398 #else /* !ENABLE_JVMPI */
399 # define JVMPI_NOTIFY_ALLOC(klass,size,obj) /* do nothing */
402 // Allocate a new object of class KLASS.
403 // First a version that assumes that we have no finalizer, and that
404 // the class is already initialized.
405 // If we know that JVMPI is disabled, this can be replaced by a direct call
406 // to the allocator for the appropriate GC.
408 _Jv_AllocObjectNoInitNoFinalizer (jclass klass)
410 jint size = klass->size ();
411 jobject obj = (jobject) _Jv_AllocObj (size, klass);
412 JVMPI_NOTIFY_ALLOC (klass, size, obj);
416 // And now a version that initializes if necessary.
418 _Jv_AllocObjectNoFinalizer (jclass klass)
420 _Jv_InitClass (klass);
421 jint size = klass->size ();
422 jobject obj = (jobject) _Jv_AllocObj (size, klass);
423 JVMPI_NOTIFY_ALLOC (klass, size, obj);
427 // And now the general version that registers a finalizer if necessary.
429 _Jv_AllocObject (jclass klass)
431 jobject obj = _Jv_AllocObjectNoFinalizer (klass);
433 // We assume that the compiler only generates calls to this routine
434 // if there really is an interesting finalizer.
435 // Unfortunately, we still have to the dynamic test, since there may
436 // be cni calls to this routine.
437 // Note that on IA64 get_finalizer() returns the starting address of the
438 // function, not a function pointer. Thus this still works.
439 if (klass->vtable->get_finalizer ()
440 != java::lang::Object::class$.vtable->get_finalizer ())
441 _Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
445 // Allocate a String, including variable length storage.
447 _Jv_AllocString(jsize len)
449 using namespace java::lang;
451 jsize sz = sizeof(java::lang::String) + len * sizeof(jchar);
453 // We assert that for strings allocated this way, the data field
454 // will always point to the object itself. Thus there is no reason
455 // for the garbage collector to scan any of it.
456 // Furthermore, we're about to overwrite the string data, so
457 // initialization of the object is not an issue.
459 // String needs no initialization, and there is no finalizer, so
460 // we can go directly to the collector's allocator interface.
461 jstring obj = (jstring) _Jv_AllocPtrFreeObj(sz, &String::class$);
464 obj->boffset = sizeof(java::lang::String);
466 obj->cachedHashCode = 0;
468 JVMPI_NOTIFY_ALLOC (&String::class$, sz, obj);
473 // A version of the above that assumes the object contains no pointers,
474 // and requires no finalization. This can't happen if we need pointers
476 #ifdef JV_HASH_SYNCHRONIZATION
478 _Jv_AllocPtrFreeObject (jclass klass)
480 _Jv_InitClass (klass);
481 jint size = klass->size ();
483 jobject obj = (jobject) _Jv_AllocPtrFreeObj (size, klass);
485 JVMPI_NOTIFY_ALLOC (klass, size, obj);
489 #endif /* JV_HASH_SYNCHRONIZATION */
492 // Allocate a new array of Java objects. Each object is of type
493 // `elementClass'. `init' is used to initialize each slot in the
496 _Jv_NewObjectArray (jsize count, jclass elementClass, jobject init)
498 if (__builtin_expect (count < 0, false))
499 throw new java::lang::NegativeArraySizeException;
501 JvAssert (! elementClass->isPrimitive ());
503 // Ensure that elements pointer is properly aligned.
504 jobjectArray obj = NULL;
505 size_t size = (size_t) elements (obj);
506 // Check for overflow.
507 if (__builtin_expect ((size_t) count >
508 (MAX_OBJECT_SIZE - 1 - size) / sizeof (jobject), false))
511 size += count * sizeof (jobject);
513 jclass klass = _Jv_GetArrayClass (elementClass,
514 elementClass->getClassLoaderInternal());
516 obj = (jobjectArray) _Jv_AllocArray (size, klass);
518 jsize *lp = const_cast<jsize *> (&obj->length);
520 // We know the allocator returns zeroed memory. So don't bother
524 jobject *ptr = elements(obj);
531 // Allocate a new array of primitives. ELTYPE is the type of the
532 // element, COUNT is the size of the array.
534 _Jv_NewPrimArray (jclass eltype, jint count)
536 int elsize = eltype->size();
537 if (__builtin_expect (count < 0, false))
538 throw new java::lang::NegativeArraySizeException;
540 JvAssert (eltype->isPrimitive ());
541 jobject dummy = NULL;
542 size_t size = (size_t) _Jv_GetArrayElementFromElementType (dummy, eltype);
544 // Check for overflow.
545 if (__builtin_expect ((size_t) count >
546 (MAX_OBJECT_SIZE - size) / elsize, false))
549 jclass klass = _Jv_GetArrayClass (eltype, 0);
551 # ifdef JV_HASH_SYNCHRONIZATION
552 // Since the vtable is always statically allocated,
553 // these are completely pointerfree! Make sure the GC doesn't touch them.
555 (__JArray*) _Jv_AllocPtrFreeObj (size + elsize * count, klass);
556 memset((char *)arr + size, 0, elsize * count);
558 __JArray *arr = (__JArray*) _Jv_AllocObj (size + elsize * count, klass);
559 // Note that we assume we are given zeroed memory by the allocator.
562 jsize *lp = const_cast<jsize *> (&arr->length);
569 _Jv_NewArray (jint type, jint size)
573 case 4: return JvNewBooleanArray (size);
574 case 5: return JvNewCharArray (size);
575 case 6: return JvNewFloatArray (size);
576 case 7: return JvNewDoubleArray (size);
577 case 8: return JvNewByteArray (size);
578 case 9: return JvNewShortArray (size);
579 case 10: return JvNewIntArray (size);
580 case 11: return JvNewLongArray (size);
582 throw new java::lang::InternalError
583 (JvNewStringLatin1 ("invalid type code in _Jv_NewArray"));
586 // Allocate a possibly multi-dimensional array but don't check that
587 // any array length is <0.
589 _Jv_NewMultiArrayUnchecked (jclass type, jint dimensions, jint *sizes)
591 JvAssert (type->isArray());
592 jclass element_type = type->getComponentType();
594 if (element_type->isPrimitive())
595 result = _Jv_NewPrimArray (element_type, sizes[0]);
597 result = _Jv_NewObjectArray (sizes[0], element_type, NULL);
601 JvAssert (! element_type->isPrimitive());
602 JvAssert (element_type->isArray());
603 jobject *contents = elements ((jobjectArray) result);
604 for (int i = 0; i < sizes[0]; ++i)
605 contents[i] = _Jv_NewMultiArrayUnchecked (element_type, dimensions - 1,
613 _Jv_NewMultiArray (jclass type, jint dimensions, jint *sizes)
615 for (int i = 0; i < dimensions; ++i)
617 throw new java::lang::NegativeArraySizeException;
619 return _Jv_NewMultiArrayUnchecked (type, dimensions, sizes);
623 _Jv_NewMultiArray (jclass array_type, jint dimensions, ...)
626 jint sizes[dimensions];
627 va_start (args, dimensions);
628 for (int i = 0; i < dimensions; ++i)
630 jint size = va_arg (args, jint);
632 throw new java::lang::NegativeArraySizeException;
637 return _Jv_NewMultiArrayUnchecked (array_type, dimensions, sizes);
642 // Ensure 8-byte alignment, for hash synchronization.
643 #define DECLARE_PRIM_TYPE(NAME) \
644 java::lang::Class _Jv_##NAME##Class __attribute__ ((aligned (8)));
646 DECLARE_PRIM_TYPE(byte)
647 DECLARE_PRIM_TYPE(short)
648 DECLARE_PRIM_TYPE(int)
649 DECLARE_PRIM_TYPE(long)
650 DECLARE_PRIM_TYPE(boolean)
651 DECLARE_PRIM_TYPE(char)
652 DECLARE_PRIM_TYPE(float)
653 DECLARE_PRIM_TYPE(double)
654 DECLARE_PRIM_TYPE(void)
657 _Jv_InitPrimClass (jclass cl, char *cname, char sig, int len)
659 using namespace java::lang::reflect;
661 // We must set the vtable for the class; the Java constructor
663 (*(_Jv_VTable **) cl) = java::lang::Class::class$.vtable;
665 // Initialize the fields we care about. We do this in the same
666 // order they are declared in Class.h.
667 cl->name = _Jv_makeUtf8Const ((char *) cname, -1);
668 cl->accflags = Modifier::PUBLIC | Modifier::FINAL | Modifier::ABSTRACT;
669 cl->method_count = sig;
670 cl->size_in_bytes = len;
671 cl->vtable = JV_PRIMITIVE_VTABLE;
672 cl->state = JV_STATE_DONE;
677 _Jv_FindClassFromSignature (char *sig, java::lang::ClassLoader *loader)
682 return JvPrimClass (byte);
684 return JvPrimClass (short);
686 return JvPrimClass (int);
688 return JvPrimClass (long);
690 return JvPrimClass (boolean);
692 return JvPrimClass (char);
694 return JvPrimClass (float);
696 return JvPrimClass (double);
698 return JvPrimClass (void);
702 for (i = 1; sig[i] && sig[i] != ';'; ++i)
704 _Jv_Utf8Const *name = _Jv_makeUtf8Const (&sig[1], i - 1);
705 return _Jv_FindClass (name, loader);
709 jclass klass = _Jv_FindClassFromSignature (&sig[1], loader);
712 return _Jv_GetArrayClass (klass, loader);
716 return NULL; // Placate compiler.
722 JvConvertArgv (int argc, const char **argv)
726 jobjectArray ar = JvNewObjectArray(argc, &StringClass, NULL);
727 jobject *ptr = elements(ar);
728 jbyteArray bytes = NULL;
729 for (int i = 0; i < argc; i++)
731 const char *arg = argv[i];
732 int len = strlen (arg);
733 if (bytes == NULL || bytes->length < len)
734 bytes = JvNewByteArray (len);
735 jbyte *bytePtr = elements (bytes);
736 // We assume jbyte == char.
737 memcpy (bytePtr, arg, len);
739 // Now convert using the default encoding.
740 *ptr++ = new java::lang::String (bytes, 0, len);
742 return (JArray<jstring>*) ar;
745 // FIXME: These variables are static so that they will be
746 // automatically scanned by the Boehm collector. This is needed
747 // because with qthreads the collector won't scan the initial stack --
748 // it will only scan the qthreads stacks.
750 // Command line arguments.
751 static JArray<jstring> *arg_vec;
753 // The primary thread.
754 static java::lang::Thread *main_thread;
756 #ifndef DISABLE_GETENV_PROPERTIES
759 next_property_key (char *s, size_t *length)
765 // Skip over whitespace
769 // If we've reached the end, return NULL. Also return NULL if for
770 // some reason we've come across a malformed property string.
776 // Determine the length of the property key.
794 next_property_value (char *s, size_t *length)
810 // If we've reached the end, return NULL.
814 // Determine the length of the property value.
833 process_gcj_properties ()
835 char *props = getenv("GCJ_PROPERTIES");
838 size_t property_count = 0;
843 // Whip through props quickly in order to count the number of
845 while (p && (p = next_property_key (p, &length)))
847 // Skip to the end of the key
850 p = next_property_value (p, &length);
857 // Allocate an array of property value/key pairs.
858 _Jv_Environment_Properties =
859 (property_pair *) malloc (sizeof(property_pair)
860 * (property_count + 1));
862 // Go through the properties again, initializing _Jv_Properties
866 while (p && (p = next_property_key (p, &length)))
868 _Jv_Environment_Properties[property_count].key = p;
869 _Jv_Environment_Properties[property_count].key_length = length;
871 // Skip to the end of the key
874 p = next_property_value (p, &length);
876 _Jv_Environment_Properties[property_count].value = p;
877 _Jv_Environment_Properties[property_count].value_length = length;
884 memset ((void *) &_Jv_Environment_Properties[property_count],
885 0, sizeof (property_pair));
887 // Null terminate the strings.
888 for (property_pair *prop = &_Jv_Environment_Properties[0];
892 prop->key[prop->key_length] = 0;
893 prop->value[prop->value_length] = 0;
896 #endif // DISABLE_GETENV_PROPERTIES
900 _Jv_Utf8Const *void_signature;
901 _Jv_Utf8Const *clinit_name;
902 _Jv_Utf8Const *init_name;
903 _Jv_Utf8Const *finit_name;
905 bool runtimeInitialized = false;
909 _Jv_CreateJavaVM (void* /*vm_args*/)
913 if (runtimeInitialized)
916 runtimeInitialized = true;
918 PROCESS_GCJ_PROPERTIES;
922 _Jv_InitializeSyncMutex ();
925 _Jv_InitInterpreter ();
936 /* Initialize Utf8 constants declared in jvm.h. */
937 void_signature = _Jv_makeUtf8Const ("()V", 3);
938 clinit_name = _Jv_makeUtf8Const ("<clinit>", 8);
939 init_name = _Jv_makeUtf8Const ("<init>", 6);
940 finit_name = _Jv_makeUtf8Const ("finit$", 6);
942 /* Initialize built-in classes to represent primitive TYPEs. */
943 _Jv_InitPrimClass (&_Jv_byteClass, "byte", 'B', 1);
944 _Jv_InitPrimClass (&_Jv_shortClass, "short", 'S', 2);
945 _Jv_InitPrimClass (&_Jv_intClass, "int", 'I', 4);
946 _Jv_InitPrimClass (&_Jv_longClass, "long", 'J', 8);
947 _Jv_InitPrimClass (&_Jv_booleanClass, "boolean", 'Z', 1);
948 _Jv_InitPrimClass (&_Jv_charClass, "char", 'C', 2);
949 _Jv_InitPrimClass (&_Jv_floatClass, "float", 'F', 4);
950 _Jv_InitPrimClass (&_Jv_doubleClass, "double", 'D', 8);
951 _Jv_InitPrimClass (&_Jv_voidClass, "void", 'V', 0);
953 // Turn stack trace generation off while creating exception objects.
954 _Jv_InitClass (&java::lang::VMThrowable::class$);
955 java::lang::VMThrowable::trace_enabled = 0;
957 // We have to initialize this fairly early, to avoid circular class
958 // initialization. In particular we want to start the
959 // initialization of ClassLoader before we start the initialization
961 _Jv_InitClass (&java::lang::ClassLoader::class$);
963 // Once the bootstrap loader is in place, change it into a kind of
964 // system loader, by having it read the class path.
965 gnu::gcj::runtime::VMClassLoader::initialize();
967 no_memory = new java::lang::OutOfMemoryError;
969 java::lang::VMThrowable::trace_enabled = 1;
972 LTDL_SET_PRELOADED_SYMBOLS ();
975 _Jv_platform_initialize ();
979 _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady);
981 // Start the GC finalizer thread. A VirtualMachineError can be
982 // thrown by the runtime if, say, threads aren't available.
985 using namespace gnu::gcj::runtime;
986 FinalizerThread *ft = new FinalizerThread ();
989 catch (java::lang::VirtualMachineError *ignore)
997 _Jv_RunMain (jclass klass, const char *name, int argc, const char **argv,
1000 #ifndef DISABLE_MAIN_ARGS
1001 _Jv_SetArgs (argc, argv);
1004 java::lang::Runtime *runtime = NULL;
1008 // Set this very early so that it is seen when java.lang.System
1011 _Jv_Jar_Class_Path = strdup (name);
1012 _Jv_CreateJavaVM (NULL);
1014 // Get the Runtime here. We want to initialize it before searching
1015 // for `main'; that way it will be set up if `main' is a JNI method.
1016 runtime = java::lang::Runtime::getRuntime ();
1018 #ifdef DISABLE_MAIN_ARGS
1019 arg_vec = JvConvertArgv (0, 0);
1021 arg_vec = JvConvertArgv (argc - 1, argv + 1);
1024 using namespace gnu::java::lang;
1026 main_thread = new MainThread (klass, arg_vec);
1028 main_thread = new MainThread (JvNewStringLatin1 (name),
1031 catch (java::lang::Throwable *t)
1033 java::lang::System::err->println (JvNewStringLatin1
1034 ("Exception during runtime initialization"));
1035 t->printStackTrace();
1039 _Jv_AttachCurrentThread (main_thread);
1040 _Jv_ThreadRun (main_thread);
1043 int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
1044 runtime->exit (status);
1048 JvRunMain (jclass klass, int argc, const char **argv)
1050 _Jv_RunMain (klass, NULL, argc, argv, false);
1055 // Parse a string and return a heap size.
1057 parse_heap_size (const char *spec)
1060 unsigned long val = strtoul (spec, &end, 10);
1061 if (*end == 'k' || *end == 'K')
1063 else if (*end == 'm' || *end == 'M')
1065 return (size_t) val;
1068 // Set the initial heap size. This might be ignored by the GC layer.
1069 // This must be called before _Jv_RunMain.
1071 _Jv_SetInitialHeapSize (const char *arg)
1073 size_t size = parse_heap_size (arg);
1074 _Jv_GCSetInitialHeapSize (size);
1077 // Set the maximum heap size. This might be ignored by the GC layer.
1078 // This must be called before _Jv_RunMain.
1080 _Jv_SetMaximumHeapSize (const char *arg)
1082 size_t size = parse_heap_size (arg);
1083 _Jv_GCSetMaximumHeapSize (size);
1089 _Jv_Malloc (jsize size)
1091 if (__builtin_expect (size == 0, false))
1093 void *ptr = malloc ((size_t) size);
1094 if (__builtin_expect (ptr == NULL, false))
1100 _Jv_Realloc (void *ptr, jsize size)
1102 if (__builtin_expect (size == 0, false))
1104 ptr = realloc (ptr, (size_t) size);
1105 if (__builtin_expect (ptr == NULL, false))
1111 _Jv_MallocUnchecked (jsize size)
1113 if (__builtin_expect (size == 0, false))
1115 return malloc ((size_t) size);
1119 _Jv_Free (void* ptr)
1126 // In theory, these routines can be #ifdef'd away on machines which
1127 // support divide overflow signals. However, we never know if some
1128 // code might have been compiled with "-fuse-divide-subroutine", so we
1129 // always include them in libgcj.
1132 _Jv_divI (jint dividend, jint divisor)
1134 if (__builtin_expect (divisor == 0, false))
1136 java::lang::ArithmeticException *arithexception
1137 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1138 throw arithexception;
1141 if (dividend == (jint) 0x80000000L && divisor == -1)
1144 return dividend / divisor;
1148 _Jv_remI (jint dividend, jint divisor)
1150 if (__builtin_expect (divisor == 0, false))
1152 java::lang::ArithmeticException *arithexception
1153 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1154 throw arithexception;
1157 if (dividend == (jint) 0x80000000L && divisor == -1)
1160 return dividend % divisor;
1164 _Jv_divJ (jlong dividend, jlong divisor)
1166 if (__builtin_expect (divisor == 0, false))
1168 java::lang::ArithmeticException *arithexception
1169 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1170 throw arithexception;
1173 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1176 return dividend / divisor;
1180 _Jv_remJ (jlong dividend, jlong divisor)
1182 if (__builtin_expect (divisor == 0, false))
1184 java::lang::ArithmeticException *arithexception
1185 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1186 throw arithexception;
1189 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1192 return dividend % divisor;
1197 // Return true if SELF_KLASS can access a field or method in
1198 // OTHER_KLASS. The field or method's access flags are specified in
1201 _Jv_CheckAccess (jclass self_klass, jclass other_klass, jint flags)
1203 using namespace java::lang::reflect;
1204 return ((self_klass == other_klass)
1205 || ((flags & Modifier::PUBLIC) != 0)
1206 || (((flags & Modifier::PROTECTED) != 0)
1207 && other_klass->isAssignableFrom (self_klass))
1208 || (((flags & Modifier::PRIVATE) == 0)
1209 && _Jv_ClassNameSamePackage (self_klass->name,
1210 other_klass->name)));