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 <execution.h>
65 #include <gnu/java/lang/MainThread.h>
71 // Execution engine for compiled code.
72 _Jv_CompiledEngine _Jv_soleCompiledEngine;
74 // We allocate a single OutOfMemoryError exception which we keep
75 // around for use if we run out of memory.
76 static java::lang::OutOfMemoryError *no_memory;
78 // Number of bytes in largest array object we create. This could be
79 // increased to the largest size_t value, so long as the appropriate
80 // functions are changed to take a size_t argument instead of jint.
81 #define MAX_OBJECT_SIZE ((1<<31) - 1)
83 static const char *no_properties[] = { NULL };
85 // Properties set at compile time.
86 const char **_Jv_Compiler_Properties = no_properties;
88 // The JAR file to add to the beginning of java.class.path.
89 const char *_Jv_Jar_Class_Path;
91 #ifndef DISABLE_GETENV_PROPERTIES
92 // Property key/value pairs.
93 property_pair *_Jv_Environment_Properties;
96 // Stash the argv pointer to benefit native libraries that need it.
97 const char **_Jv_argv;
104 // _Jv_argc is 0 if not explicitly initialized.
109 _Jv_GetSafeArg (int index)
111 if (index >=0 && index < _Jv_GetNbArgs ())
112 return _Jv_argv[index];
118 _Jv_SetArgs (int argc, const char **argv)
125 // Pointer to JVMPI notification functions.
126 void (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (JVMPI_Event *event);
127 void (*_Jv_JVMPI_Notify_THREAD_START) (JVMPI_Event *event);
128 void (*_Jv_JVMPI_Notify_THREAD_END) (JVMPI_Event *event);
132 #if defined (HANDLE_SEGV) || defined(HANDLE_FPE)
133 /* Unblock a signal. Unless we do this, the signal may only be sent
136 unblock_signal (int signum __attribute__ ((__unused__)))
138 #ifdef _POSIX_VERSION
142 sigaddset (&sigs, signum);
143 sigprocmask (SIG_UNBLOCK, &sigs, NULL);
149 SIGNAL_HANDLER (catch_segv)
151 java::lang::NullPointerException *nullp
152 = new java::lang::NullPointerException;
153 unblock_signal (SIGSEGV);
154 MAKE_THROW_FRAME (nullp);
160 SIGNAL_HANDLER (catch_fpe)
162 java::lang::ArithmeticException *arithexception
163 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
164 unblock_signal (SIGFPE);
165 #ifdef HANDLE_DIVIDE_OVERFLOW
166 HANDLE_DIVIDE_OVERFLOW;
168 MAKE_THROW_FRAME (arithexception);
170 throw arithexception;
177 _Jv_equalUtf8Consts (const Utf8Const* a, const Utf8Const *b)
180 const _Jv_ushort *aptr, *bptr;
183 if (a->hash != b->hash)
186 if (b->length != len)
188 aptr = (const _Jv_ushort *)a->data;
189 bptr = (const _Jv_ushort *)b->data;
190 len = (len + 1) >> 1;
192 if (*aptr++ != *bptr++)
197 /* True iff A is equal to STR.
198 HASH is STR->hashCode().
202 _Jv_equal (Utf8Const* a, jstring str, jint hash)
204 if (a->hash != (_Jv_ushort) hash)
206 jint len = str->length();
208 jchar *sptr = _Jv_GetStringChars (str);
209 unsigned char* ptr = (unsigned char*) a->data;
210 unsigned char* limit = ptr + a->length;
213 int ch = UTF8_GET (ptr, limit);
222 /* Like _Jv_equal, but stop after N characters. */
224 _Jv_equaln (Utf8Const *a, jstring str, jint n)
226 jint len = str->length();
228 jchar *sptr = _Jv_GetStringChars (str);
229 unsigned char* ptr = (unsigned char*) a->data;
230 unsigned char* limit = ptr + a->length;
231 for (; n-- > 0; i++, sptr++)
233 int ch = UTF8_GET (ptr, limit);
242 /* Count the number of Unicode chars encoded in a given Ut8 string. */
244 _Jv_strLengthUtf8(char* str, int len)
247 unsigned char* limit;
250 ptr = (unsigned char*) str;
253 for (; ptr < limit; str_length++)
255 if (UTF8_GET (ptr, limit) < 0)
261 /* Calculate a hash value for a string encoded in Utf8 format.
262 * This returns the same hash value as specified or java.lang.String.hashCode.
265 _Jv_hashUtf8String (char* str, int len)
267 unsigned char* ptr = (unsigned char*) str;
268 unsigned char* limit = ptr + len;
273 int ch = UTF8_GET (ptr, limit);
274 /* Updated specification from
275 http://www.javasoft.com/docs/books/jls/clarify.html. */
276 hash = (31 * hash) + ch;
282 _Jv_Utf8Const::init(char *s, int len)
284 ::memcpy (data, s, len);
287 hash = _Jv_hashUtf8String (s, len) & 0xFFFF;
291 _Jv_makeUtf8Const (char* s, int len)
296 = (Utf8Const*) _Jv_AllocBytes (_Jv_Utf8Const::space_needed(s, len));
302 _Jv_makeUtf8Const (jstring string)
304 jint hash = string->hashCode ();
305 jint len = _Jv_GetStringUTFLength (string);
307 Utf8Const* m = (Utf8Const*)
308 _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
313 _Jv_GetStringUTFRegion (string, 0, string->length (), m->data);
323 _Jv_Abort (const char *function, const char *file, int line,
327 _Jv_Abort (const char *, const char *, int, const char *message)
332 "libgcj failure: %s\n in function %s, file %s, line %d\n",
333 message, function, file, line);
335 fprintf (stderr, "libgcj failure: %s\n", message);
341 fail_on_finalization (jobject)
343 JvFail ("object was finalized");
347 _Jv_GCWatch (jobject obj)
349 _Jv_RegisterFinalizer (obj, fail_on_finalization);
353 _Jv_ThrowBadArrayIndex(jint bad_index)
355 throw new java::lang::ArrayIndexOutOfBoundsException
356 (java::lang::String::valueOf (bad_index));
360 _Jv_ThrowNullPointerException ()
362 throw new java::lang::NullPointerException;
365 // Explicitly throw a no memory exception.
366 // The collector calls this when it encounters an out-of-memory condition.
367 void _Jv_ThrowNoMemory()
373 # define JVMPI_NOTIFY_ALLOC(klass,size,obj) \
374 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false)) \
375 jvmpi_notify_alloc(klass,size,obj);
377 jvmpi_notify_alloc(jclass klass, jint size, jobject obj)
379 // Service JVMPI allocation request.
382 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
384 event.u.obj_alloc.arena_id = 0;
385 event.u.obj_alloc.class_id = (jobjectID) klass;
386 event.u.obj_alloc.is_array = 0;
387 event.u.obj_alloc.size = size;
388 event.u.obj_alloc.obj_id = (jobjectID) obj;
390 // FIXME: This doesn't look right for the Boehm GC. A GC may
391 // already be in progress. _Jv_DisableGC () doesn't wait for it.
392 // More importantly, I don't see the need for disabling GC, since we
393 // blatantly have a pointer to obj on our stack, ensuring that the
394 // object can't be collected. Even for a nonconservative collector,
395 // it appears to me that this must be true, since we are about to
396 // return obj. Isn't this whole approach way too intrusive for
397 // a useful profiling interface? - HB
399 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
402 #else /* !ENABLE_JVMPI */
403 # define JVMPI_NOTIFY_ALLOC(klass,size,obj) /* do nothing */
406 // Allocate a new object of class KLASS.
407 // First a version that assumes that we have no finalizer, and that
408 // the class is already initialized.
409 // If we know that JVMPI is disabled, this can be replaced by a direct call
410 // to the allocator for the appropriate GC.
412 _Jv_AllocObjectNoInitNoFinalizer (jclass klass)
414 jint size = klass->size ();
415 jobject obj = (jobject) _Jv_AllocObj (size, klass);
416 JVMPI_NOTIFY_ALLOC (klass, size, obj);
420 // And now a version that initializes if necessary.
422 _Jv_AllocObjectNoFinalizer (jclass klass)
424 _Jv_InitClass (klass);
425 jint size = klass->size ();
426 jobject obj = (jobject) _Jv_AllocObj (size, klass);
427 JVMPI_NOTIFY_ALLOC (klass, size, obj);
431 // And now the general version that registers a finalizer if necessary.
433 _Jv_AllocObject (jclass klass)
435 jobject obj = _Jv_AllocObjectNoFinalizer (klass);
437 // We assume that the compiler only generates calls to this routine
438 // if there really is an interesting finalizer.
439 // Unfortunately, we still have to the dynamic test, since there may
440 // be cni calls to this routine.
441 // Note that on IA64 get_finalizer() returns the starting address of the
442 // function, not a function pointer. Thus this still works.
443 if (klass->vtable->get_finalizer ()
444 != java::lang::Object::class$.vtable->get_finalizer ())
445 _Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
449 // Allocate a String, including variable length storage.
451 _Jv_AllocString(jsize len)
453 using namespace java::lang;
455 jsize sz = sizeof(java::lang::String) + len * sizeof(jchar);
457 // We assert that for strings allocated this way, the data field
458 // will always point to the object itself. Thus there is no reason
459 // for the garbage collector to scan any of it.
460 // Furthermore, we're about to overwrite the string data, so
461 // initialization of the object is not an issue.
463 // String needs no initialization, and there is no finalizer, so
464 // we can go directly to the collector's allocator interface.
465 jstring obj = (jstring) _Jv_AllocPtrFreeObj(sz, &String::class$);
468 obj->boffset = sizeof(java::lang::String);
470 obj->cachedHashCode = 0;
472 JVMPI_NOTIFY_ALLOC (&String::class$, sz, obj);
477 // A version of the above that assumes the object contains no pointers,
478 // and requires no finalization. This can't happen if we need pointers
480 #ifdef JV_HASH_SYNCHRONIZATION
482 _Jv_AllocPtrFreeObject (jclass klass)
484 _Jv_InitClass (klass);
485 jint size = klass->size ();
487 jobject obj = (jobject) _Jv_AllocPtrFreeObj (size, klass);
489 JVMPI_NOTIFY_ALLOC (klass, size, obj);
493 #endif /* JV_HASH_SYNCHRONIZATION */
496 // Allocate a new array of Java objects. Each object is of type
497 // `elementClass'. `init' is used to initialize each slot in the
500 _Jv_NewObjectArray (jsize count, jclass elementClass, jobject init)
502 if (__builtin_expect (count < 0, false))
503 throw new java::lang::NegativeArraySizeException;
505 JvAssert (! elementClass->isPrimitive ());
507 // Ensure that elements pointer is properly aligned.
508 jobjectArray obj = NULL;
509 size_t size = (size_t) elements (obj);
510 // Check for overflow.
511 if (__builtin_expect ((size_t) count >
512 (MAX_OBJECT_SIZE - 1 - size) / sizeof (jobject), false))
515 size += count * sizeof (jobject);
517 jclass klass = _Jv_GetArrayClass (elementClass,
518 elementClass->getClassLoaderInternal());
520 obj = (jobjectArray) _Jv_AllocArray (size, klass);
522 jsize *lp = const_cast<jsize *> (&obj->length);
524 // We know the allocator returns zeroed memory. So don't bother
528 jobject *ptr = elements(obj);
535 // Allocate a new array of primitives. ELTYPE is the type of the
536 // element, COUNT is the size of the array.
538 _Jv_NewPrimArray (jclass eltype, jint count)
540 int elsize = eltype->size();
541 if (__builtin_expect (count < 0, false))
542 throw new java::lang::NegativeArraySizeException;
544 JvAssert (eltype->isPrimitive ());
545 jobject dummy = NULL;
546 size_t size = (size_t) _Jv_GetArrayElementFromElementType (dummy, eltype);
548 // Check for overflow.
549 if (__builtin_expect ((size_t) count >
550 (MAX_OBJECT_SIZE - size) / elsize, false))
553 jclass klass = _Jv_GetArrayClass (eltype, 0);
555 # ifdef JV_HASH_SYNCHRONIZATION
556 // Since the vtable is always statically allocated,
557 // these are completely pointerfree! Make sure the GC doesn't touch them.
559 (__JArray*) _Jv_AllocPtrFreeObj (size + elsize * count, klass);
560 memset((char *)arr + size, 0, elsize * count);
562 __JArray *arr = (__JArray*) _Jv_AllocObj (size + elsize * count, klass);
563 // Note that we assume we are given zeroed memory by the allocator.
566 jsize *lp = const_cast<jsize *> (&arr->length);
573 _Jv_NewArray (jint type, jint size)
577 case 4: return JvNewBooleanArray (size);
578 case 5: return JvNewCharArray (size);
579 case 6: return JvNewFloatArray (size);
580 case 7: return JvNewDoubleArray (size);
581 case 8: return JvNewByteArray (size);
582 case 9: return JvNewShortArray (size);
583 case 10: return JvNewIntArray (size);
584 case 11: return JvNewLongArray (size);
586 throw new java::lang::InternalError
587 (JvNewStringLatin1 ("invalid type code in _Jv_NewArray"));
590 // Allocate a possibly multi-dimensional array but don't check that
591 // any array length is <0.
593 _Jv_NewMultiArrayUnchecked (jclass type, jint dimensions, jint *sizes)
595 JvAssert (type->isArray());
596 jclass element_type = type->getComponentType();
598 if (element_type->isPrimitive())
599 result = _Jv_NewPrimArray (element_type, sizes[0]);
601 result = _Jv_NewObjectArray (sizes[0], element_type, NULL);
605 JvAssert (! element_type->isPrimitive());
606 JvAssert (element_type->isArray());
607 jobject *contents = elements ((jobjectArray) result);
608 for (int i = 0; i < sizes[0]; ++i)
609 contents[i] = _Jv_NewMultiArrayUnchecked (element_type, dimensions - 1,
617 _Jv_NewMultiArray (jclass type, jint dimensions, jint *sizes)
619 for (int i = 0; i < dimensions; ++i)
621 throw new java::lang::NegativeArraySizeException;
623 return _Jv_NewMultiArrayUnchecked (type, dimensions, sizes);
627 _Jv_NewMultiArray (jclass array_type, jint dimensions, ...)
630 jint sizes[dimensions];
631 va_start (args, dimensions);
632 for (int i = 0; i < dimensions; ++i)
634 jint size = va_arg (args, jint);
636 throw new java::lang::NegativeArraySizeException;
641 return _Jv_NewMultiArrayUnchecked (array_type, dimensions, sizes);
646 // Ensure 8-byte alignment, for hash synchronization.
647 #define DECLARE_PRIM_TYPE(NAME) \
648 java::lang::Class _Jv_##NAME##Class __attribute__ ((aligned (8)));
650 DECLARE_PRIM_TYPE(byte)
651 DECLARE_PRIM_TYPE(short)
652 DECLARE_PRIM_TYPE(int)
653 DECLARE_PRIM_TYPE(long)
654 DECLARE_PRIM_TYPE(boolean)
655 DECLARE_PRIM_TYPE(char)
656 DECLARE_PRIM_TYPE(float)
657 DECLARE_PRIM_TYPE(double)
658 DECLARE_PRIM_TYPE(void)
661 _Jv_InitPrimClass (jclass cl, char *cname, char sig, int len)
663 using namespace java::lang::reflect;
665 // We must set the vtable for the class; the Java constructor
667 (*(_Jv_VTable **) cl) = java::lang::Class::class$.vtable;
669 // Initialize the fields we care about. We do this in the same
670 // order they are declared in Class.h.
671 cl->name = _Jv_makeUtf8Const ((char *) cname, -1);
672 cl->accflags = Modifier::PUBLIC | Modifier::FINAL | Modifier::ABSTRACT;
673 cl->method_count = sig;
674 cl->size_in_bytes = len;
675 cl->vtable = JV_PRIMITIVE_VTABLE;
676 cl->state = JV_STATE_DONE;
681 _Jv_FindClassFromSignature (char *sig, java::lang::ClassLoader *loader)
686 return JvPrimClass (byte);
688 return JvPrimClass (short);
690 return JvPrimClass (int);
692 return JvPrimClass (long);
694 return JvPrimClass (boolean);
696 return JvPrimClass (char);
698 return JvPrimClass (float);
700 return JvPrimClass (double);
702 return JvPrimClass (void);
706 for (i = 1; sig[i] && sig[i] != ';'; ++i)
708 _Jv_Utf8Const *name = _Jv_makeUtf8Const (&sig[1], i - 1);
709 return _Jv_FindClass (name, loader);
713 jclass klass = _Jv_FindClassFromSignature (&sig[1], loader);
716 return _Jv_GetArrayClass (klass, loader);
720 return NULL; // Placate compiler.
726 JvConvertArgv (int argc, const char **argv)
730 jobjectArray ar = JvNewObjectArray(argc, &java::lang::String::class$, NULL);
731 jobject *ptr = elements(ar);
732 jbyteArray bytes = NULL;
733 for (int i = 0; i < argc; i++)
735 const char *arg = argv[i];
736 int len = strlen (arg);
737 if (bytes == NULL || bytes->length < len)
738 bytes = JvNewByteArray (len);
739 jbyte *bytePtr = elements (bytes);
740 // We assume jbyte == char.
741 memcpy (bytePtr, arg, len);
743 // Now convert using the default encoding.
744 *ptr++ = new java::lang::String (bytes, 0, len);
746 return (JArray<jstring>*) ar;
749 // FIXME: These variables are static so that they will be
750 // automatically scanned by the Boehm collector. This is needed
751 // because with qthreads the collector won't scan the initial stack --
752 // it will only scan the qthreads stacks.
754 // Command line arguments.
755 static JArray<jstring> *arg_vec;
757 // The primary thread.
758 static java::lang::Thread *main_thread;
760 #ifndef DISABLE_GETENV_PROPERTIES
763 next_property_key (char *s, size_t *length)
769 // Skip over whitespace
773 // If we've reached the end, return NULL. Also return NULL if for
774 // some reason we've come across a malformed property string.
780 // Determine the length of the property key.
798 next_property_value (char *s, size_t *length)
814 // If we've reached the end, return NULL.
818 // Determine the length of the property value.
837 process_gcj_properties ()
839 char *props = getenv("GCJ_PROPERTIES");
842 size_t property_count = 0;
847 // Whip through props quickly in order to count the number of
849 while (p && (p = next_property_key (p, &length)))
851 // Skip to the end of the key
854 p = next_property_value (p, &length);
861 // Allocate an array of property value/key pairs.
862 _Jv_Environment_Properties =
863 (property_pair *) malloc (sizeof(property_pair)
864 * (property_count + 1));
866 // Go through the properties again, initializing _Jv_Properties
870 while (p && (p = next_property_key (p, &length)))
872 _Jv_Environment_Properties[property_count].key = p;
873 _Jv_Environment_Properties[property_count].key_length = length;
875 // Skip to the end of the key
878 p = next_property_value (p, &length);
880 _Jv_Environment_Properties[property_count].value = p;
881 _Jv_Environment_Properties[property_count].value_length = length;
888 memset ((void *) &_Jv_Environment_Properties[property_count],
889 0, sizeof (property_pair));
891 // Null terminate the strings.
892 for (property_pair *prop = &_Jv_Environment_Properties[0];
896 prop->key[prop->key_length] = 0;
897 prop->value[prop->value_length] = 0;
900 #endif // DISABLE_GETENV_PROPERTIES
904 _Jv_Utf8Const *void_signature;
905 _Jv_Utf8Const *clinit_name;
906 _Jv_Utf8Const *init_name;
907 _Jv_Utf8Const *finit_name;
909 bool runtimeInitialized = false;
913 _Jv_CreateJavaVM (void* /*vm_args*/)
917 if (runtimeInitialized)
920 runtimeInitialized = true;
922 PROCESS_GCJ_PROPERTIES;
926 _Jv_InitializeSyncMutex ();
929 _Jv_InitInterpreter ();
940 /* Initialize Utf8 constants declared in jvm.h. */
941 void_signature = _Jv_makeUtf8Const ("()V", 3);
942 clinit_name = _Jv_makeUtf8Const ("<clinit>", 8);
943 init_name = _Jv_makeUtf8Const ("<init>", 6);
944 finit_name = _Jv_makeUtf8Const ("finit$", 6);
946 /* Initialize built-in classes to represent primitive TYPEs. */
947 _Jv_InitPrimClass (&_Jv_byteClass, "byte", 'B', 1);
948 _Jv_InitPrimClass (&_Jv_shortClass, "short", 'S', 2);
949 _Jv_InitPrimClass (&_Jv_intClass, "int", 'I', 4);
950 _Jv_InitPrimClass (&_Jv_longClass, "long", 'J', 8);
951 _Jv_InitPrimClass (&_Jv_booleanClass, "boolean", 'Z', 1);
952 _Jv_InitPrimClass (&_Jv_charClass, "char", 'C', 2);
953 _Jv_InitPrimClass (&_Jv_floatClass, "float", 'F', 4);
954 _Jv_InitPrimClass (&_Jv_doubleClass, "double", 'D', 8);
955 _Jv_InitPrimClass (&_Jv_voidClass, "void", 'V', 0);
957 // Turn stack trace generation off while creating exception objects.
958 _Jv_InitClass (&java::lang::VMThrowable::class$);
959 java::lang::VMThrowable::trace_enabled = 0;
961 // We have to initialize this fairly early, to avoid circular class
962 // initialization. In particular we want to start the
963 // initialization of ClassLoader before we start the initialization
965 _Jv_InitClass (&java::lang::ClassLoader::class$);
967 // Once the bootstrap loader is in place, change it into a kind of
968 // system loader, by having it read the class path.
969 gnu::gcj::runtime::VMClassLoader::initialize();
971 no_memory = new java::lang::OutOfMemoryError;
973 java::lang::VMThrowable::trace_enabled = 1;
976 LTDL_SET_PRELOADED_SYMBOLS ();
979 _Jv_platform_initialize ();
983 _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady);
985 // Start the GC finalizer thread. A VirtualMachineError can be
986 // thrown by the runtime if, say, threads aren't available.
989 using namespace gnu::gcj::runtime;
990 FinalizerThread *ft = new FinalizerThread ();
993 catch (java::lang::VirtualMachineError *ignore)
1001 _Jv_RunMain (jclass klass, const char *name, int argc, const char **argv,
1004 #ifndef DISABLE_MAIN_ARGS
1005 _Jv_SetArgs (argc, argv);
1008 java::lang::Runtime *runtime = NULL;
1012 // Set this very early so that it is seen when java.lang.System
1015 _Jv_Jar_Class_Path = strdup (name);
1016 _Jv_CreateJavaVM (NULL);
1018 // Get the Runtime here. We want to initialize it before searching
1019 // for `main'; that way it will be set up if `main' is a JNI method.
1020 runtime = java::lang::Runtime::getRuntime ();
1022 #ifdef DISABLE_MAIN_ARGS
1023 arg_vec = JvConvertArgv (0, 0);
1025 arg_vec = JvConvertArgv (argc - 1, argv + 1);
1028 using namespace gnu::java::lang;
1030 main_thread = new MainThread (klass, arg_vec);
1032 main_thread = new MainThread (JvNewStringLatin1 (name),
1035 catch (java::lang::Throwable *t)
1037 java::lang::System::err->println (JvNewStringLatin1
1038 ("Exception during runtime initialization"));
1039 t->printStackTrace();
1043 _Jv_AttachCurrentThread (main_thread);
1044 _Jv_ThreadRun (main_thread);
1047 int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
1048 runtime->exit (status);
1052 JvRunMain (jclass klass, int argc, const char **argv)
1054 _Jv_RunMain (klass, NULL, argc, argv, false);
1059 // Parse a string and return a heap size.
1061 parse_heap_size (const char *spec)
1064 unsigned long val = strtoul (spec, &end, 10);
1065 if (*end == 'k' || *end == 'K')
1067 else if (*end == 'm' || *end == 'M')
1069 return (size_t) val;
1072 // Set the initial heap size. This might be ignored by the GC layer.
1073 // This must be called before _Jv_RunMain.
1075 _Jv_SetInitialHeapSize (const char *arg)
1077 size_t size = parse_heap_size (arg);
1078 _Jv_GCSetInitialHeapSize (size);
1081 // Set the maximum heap size. This might be ignored by the GC layer.
1082 // This must be called before _Jv_RunMain.
1084 _Jv_SetMaximumHeapSize (const char *arg)
1086 size_t size = parse_heap_size (arg);
1087 _Jv_GCSetMaximumHeapSize (size);
1093 _Jv_Malloc (jsize size)
1095 if (__builtin_expect (size == 0, false))
1097 void *ptr = malloc ((size_t) size);
1098 if (__builtin_expect (ptr == NULL, false))
1104 _Jv_Realloc (void *ptr, jsize size)
1106 if (__builtin_expect (size == 0, false))
1108 ptr = realloc (ptr, (size_t) size);
1109 if (__builtin_expect (ptr == NULL, false))
1115 _Jv_MallocUnchecked (jsize size)
1117 if (__builtin_expect (size == 0, false))
1119 return malloc ((size_t) size);
1123 _Jv_Free (void* ptr)
1130 // In theory, these routines can be #ifdef'd away on machines which
1131 // support divide overflow signals. However, we never know if some
1132 // code might have been compiled with "-fuse-divide-subroutine", so we
1133 // always include them in libgcj.
1136 _Jv_divI (jint dividend, jint divisor)
1138 if (__builtin_expect (divisor == 0, false))
1140 java::lang::ArithmeticException *arithexception
1141 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1142 throw arithexception;
1145 if (dividend == (jint) 0x80000000L && divisor == -1)
1148 return dividend / divisor;
1152 _Jv_remI (jint dividend, jint divisor)
1154 if (__builtin_expect (divisor == 0, false))
1156 java::lang::ArithmeticException *arithexception
1157 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1158 throw arithexception;
1161 if (dividend == (jint) 0x80000000L && divisor == -1)
1164 return dividend % divisor;
1168 _Jv_divJ (jlong dividend, jlong divisor)
1170 if (__builtin_expect (divisor == 0, false))
1172 java::lang::ArithmeticException *arithexception
1173 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1174 throw arithexception;
1177 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1180 return dividend / divisor;
1184 _Jv_remJ (jlong dividend, jlong divisor)
1186 if (__builtin_expect (divisor == 0, false))
1188 java::lang::ArithmeticException *arithexception
1189 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1190 throw arithexception;
1193 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1196 return dividend % divisor;
1201 // Return true if SELF_KLASS can access a field or method in
1202 // OTHER_KLASS. The field or method's access flags are specified in
1205 _Jv_CheckAccess (jclass self_klass, jclass other_klass, jint flags)
1207 using namespace java::lang::reflect;
1208 return ((self_klass == other_klass)
1209 || ((flags & Modifier::PUBLIC) != 0)
1210 || (((flags & Modifier::PROTECTED) != 0)
1211 && _Jv_IsAssignableFromSlow (other_klass, self_klass))
1212 || (((flags & Modifier::PRIVATE) == 0)
1213 && _Jv_ClassNameSamePackage (self_klass->name,
1214 other_klass->name)));