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 // The name of this executable.
90 static char *_Jv_execName;
92 // Stash the argv pointer to benefit native libraries that need it.
93 const char **_Jv_argv;
97 // Pointer to JVMPI notification functions.
98 void (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (JVMPI_Event *event);
99 void (*_Jv_JVMPI_Notify_THREAD_START) (JVMPI_Event *event);
100 void (*_Jv_JVMPI_Notify_THREAD_END) (JVMPI_Event *event);
104 extern "C" void _Jv_ThrowSignal (jthrowable) __attribute ((noreturn));
106 // Just like _Jv_Throw, but fill in the stack trace first. Although
107 // this is declared extern in order that its name not be mangled, it
108 // is not intended to be used outside this file.
110 _Jv_ThrowSignal (jthrowable throwable)
112 throwable->fillInStackTrace ();
117 static java::lang::NullPointerException *nullp;
119 SIGNAL_HANDLER (catch_segv)
121 MAKE_THROW_FRAME (nullp);
122 _Jv_ThrowSignal (nullp);
126 static java::lang::ArithmeticException *arithexception;
129 SIGNAL_HANDLER (catch_fpe)
131 #ifdef HANDLE_DIVIDE_OVERFLOW
132 HANDLE_DIVIDE_OVERFLOW;
134 MAKE_THROW_FRAME (arithexception);
136 _Jv_ThrowSignal (arithexception);
143 _Jv_equalUtf8Consts (Utf8Const* a, Utf8Const *b)
146 _Jv_ushort *aptr, *bptr;
149 if (a->hash != b->hash)
152 if (b->length != len)
154 aptr = (_Jv_ushort *)a->data;
155 bptr = (_Jv_ushort *)b->data;
156 len = (len + 1) >> 1;
158 if (*aptr++ != *bptr++)
163 /* True iff A is equal to STR.
164 HASH is STR->hashCode().
168 _Jv_equal (Utf8Const* a, jstring str, jint hash)
170 if (a->hash != (_Jv_ushort) hash)
172 jint len = str->length();
174 jchar *sptr = _Jv_GetStringChars (str);
175 unsigned char* ptr = (unsigned char*) a->data;
176 unsigned char* limit = ptr + a->length;
179 int ch = UTF8_GET (ptr, limit);
188 /* Like _Jv_equal, but stop after N characters. */
190 _Jv_equaln (Utf8Const *a, jstring str, jint n)
192 jint len = str->length();
194 jchar *sptr = _Jv_GetStringChars (str);
195 unsigned char* ptr = (unsigned char*) a->data;
196 unsigned char* limit = ptr + a->length;
197 for (; n-- > 0; i++, sptr++)
199 int ch = UTF8_GET (ptr, limit);
208 /* Count the number of Unicode chars encoded in a given Ut8 string. */
210 _Jv_strLengthUtf8(char* str, int len)
213 unsigned char* limit;
216 ptr = (unsigned char*) str;
219 for (; ptr < limit; str_length++)
221 if (UTF8_GET (ptr, limit) < 0)
227 /* Calculate a hash value for a string encoded in Utf8 format.
228 * This returns the same hash value as specified or java.lang.String.hashCode.
231 hashUtf8String (char* str, int len)
233 unsigned char* ptr = (unsigned char*) str;
234 unsigned char* limit = ptr + len;
239 int ch = UTF8_GET (ptr, limit);
240 /* Updated specification from
241 http://www.javasoft.com/docs/books/jls/clarify.html. */
242 hash = (31 * hash) + ch;
248 _Jv_makeUtf8Const (char* s, int len)
252 Utf8Const* m = (Utf8Const*) _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
253 memcpy (m->data, s, len);
256 m->hash = hashUtf8String (s, len) & 0xFFFF;
261 _Jv_makeUtf8Const (jstring string)
263 jint hash = string->hashCode ();
264 jint len = _Jv_GetStringUTFLength (string);
266 Utf8Const* m = (Utf8Const*)
267 _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
272 _Jv_GetStringUTFRegion (string, 0, string->length (), m->data);
282 _Jv_Abort (const char *function, const char *file, int line,
286 _Jv_Abort (const char *, const char *, int, const char *message)
291 "libgcj failure: %s\n in function %s, file %s, line %d\n",
292 message, function, file, line);
294 fprintf (stderr, "libgcj failure: %s\n", message);
300 fail_on_finalization (jobject)
302 JvFail ("object was finalized");
306 _Jv_GCWatch (jobject obj)
308 _Jv_RegisterFinalizer (obj, fail_on_finalization);
312 _Jv_ThrowBadArrayIndex(jint bad_index)
314 throw new java::lang::ArrayIndexOutOfBoundsException
315 (java::lang::String::valueOf (bad_index));
319 _Jv_ThrowNullPointerException ()
321 throw new java::lang::NullPointerException;
324 // Explicitly throw a no memory exception.
325 // The collector calls this when it encounters an out-of-memory condition.
326 void _Jv_ThrowNoMemory()
333 jvmpi_notify_alloc(jclass klass, jint size, jobject obj)
335 // Service JVMPI allocation request.
336 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
340 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
342 event.u.obj_alloc.arena_id = 0;
343 event.u.obj_alloc.class_id = (jobjectID) klass;
344 event.u.obj_alloc.is_array = 0;
345 event.u.obj_alloc.size = size;
346 event.u.obj_alloc.obj_id = (jobjectID) obj;
348 // FIXME: This doesn't look right for the Boehm GC. A GC may
349 // already be in progress. _Jv_DisableGC () doesn't wait for it.
350 // More importantly, I don't see the need for disabling GC, since we
351 // blatantly have a pointer to obj on our stack, ensuring that the
352 // object can't be collected. Even for a nonconservative collector,
353 // it appears to me that this must be true, since we are about to
354 // return obj. Isn't this whole approach way too intrusive for
355 // a useful profiling interface? - HB
357 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
361 #else /* !ENABLE_JVMPI */
362 # define jvmpi_notify_alloc(klass,size,obj) /* do nothing */
365 // Allocate a new object of class KLASS. SIZE is the size of the object
366 // to allocate. You might think this is redundant, but it isn't; some
367 // classes, such as String, aren't of fixed size.
368 // First a version that assumes that we have no finalizer, and that
369 // the class is already initialized.
370 // If we know that JVMPI is disabled, this can be replaced by a direct call
371 // to the allocator for the appropriate GC.
373 _Jv_AllocObjectNoInitNoFinalizer (jclass klass, jint size)
375 jobject obj = (jobject) _Jv_AllocObj (size, klass);
376 jvmpi_notify_alloc (klass, size, obj);
380 // And now a version that initializes if necessary.
382 _Jv_AllocObjectNoFinalizer (jclass klass, jint size)
384 _Jv_InitClass (klass);
385 jobject obj = (jobject) _Jv_AllocObj (size, klass);
386 jvmpi_notify_alloc (klass, size, obj);
390 // And now the general version that registers a finalizer if necessary.
392 _Jv_AllocObject (jclass klass, jint size)
394 jobject obj = _Jv_AllocObjectNoFinalizer (klass, size);
396 // We assume that the compiler only generates calls to this routine
397 // if there really is an interesting finalizer.
398 // Unfortunately, we still have to the dynamic test, since there may
399 // be cni calls to this routine.
400 // Note that on IA64 get_finalizer() returns the starting address of the
401 // function, not a function pointer. Thus this still works.
402 if (klass->vtable->get_finalizer ()
403 != java::lang::Object::class$.vtable->get_finalizer ())
404 _Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
408 // A version of the above that assumes the object contains no pointers,
409 // and requires no finalization. This can't happen if we need pointers
411 #ifdef JV_HASH_SYNCHRONIZATION
413 _Jv_AllocPtrFreeObject (jclass klass, jint size)
415 _Jv_InitClass (klass);
417 jobject obj = (jobject) _Jv_AllocPtrFreeObj (size, klass);
420 // Service JVMPI request.
422 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
426 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
428 event.u.obj_alloc.arena_id = 0;
429 event.u.obj_alloc.class_id = (jobjectID) klass;
430 event.u.obj_alloc.is_array = 0;
431 event.u.obj_alloc.size = size;
432 event.u.obj_alloc.obj_id = (jobjectID) obj;
435 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
442 #endif /* JV_HASH_SYNCHRONIZATION */
445 // Allocate a new array of Java objects. Each object is of type
446 // `elementClass'. `init' is used to initialize each slot in the
449 _Jv_NewObjectArray (jsize count, jclass elementClass, jobject init)
451 if (__builtin_expect (count < 0, false))
452 throw new java::lang::NegativeArraySizeException;
454 JvAssert (! elementClass->isPrimitive ());
456 // Ensure that elements pointer is properly aligned.
457 jobjectArray obj = NULL;
458 size_t size = (size_t) elements (obj);
459 size += count * sizeof (jobject);
461 jclass klass = _Jv_GetArrayClass (elementClass,
462 elementClass->getClassLoaderInternal());
464 obj = (jobjectArray) _Jv_AllocArray (size, klass);
466 jsize *lp = const_cast<jsize *> (&obj->length);
468 // We know the allocator returns zeroed memory. So don't bother
472 jobject *ptr = elements(obj);
479 // Allocate a new array of primitives. ELTYPE is the type of the
480 // element, COUNT is the size of the array.
482 _Jv_NewPrimArray (jclass eltype, jint count)
484 int elsize = eltype->size();
485 if (__builtin_expect (count < 0, false))
486 throw new java::lang::NegativeArraySizeException;
488 JvAssert (eltype->isPrimitive ());
489 jobject dummy = NULL;
490 size_t size = (size_t) _Jv_GetArrayElementFromElementType (dummy, eltype);
492 // Check for overflow.
493 if (__builtin_expect ((size_t) count >
494 (SIZE_T_MAX - size) / elsize, false))
497 jclass klass = _Jv_GetArrayClass (eltype, 0);
499 # ifdef JV_HASH_SYNCHRONIZATION
500 // Since the vtable is always statically allocated,
501 // these are completely pointerfree! Make sure the GC doesn't touch them.
503 (__JArray*) _Jv_AllocPtrFreeObj (size + elsize * count, klass);
504 memset((char *)arr + size, 0, elsize * count);
506 __JArray *arr = (__JArray*) _Jv_AllocObj (size + elsize * count, klass);
507 // Note that we assume we are given zeroed memory by the allocator.
510 jsize *lp = const_cast<jsize *> (&arr->length);
517 _Jv_NewArray (jint type, jint size)
521 case 4: return JvNewBooleanArray (size);
522 case 5: return JvNewCharArray (size);
523 case 6: return JvNewFloatArray (size);
524 case 7: return JvNewDoubleArray (size);
525 case 8: return JvNewByteArray (size);
526 case 9: return JvNewShortArray (size);
527 case 10: return JvNewIntArray (size);
528 case 11: return JvNewLongArray (size);
530 throw new java::lang::InternalError
531 (JvNewStringLatin1 ("invalid type code in _Jv_NewArray"));
534 // Allocate a possibly multi-dimensional array but don't check that
535 // any array length is <0.
537 _Jv_NewMultiArrayUnchecked (jclass type, jint dimensions, jint *sizes)
539 JvAssert (type->isArray());
540 jclass element_type = type->getComponentType();
542 if (element_type->isPrimitive())
543 result = _Jv_NewPrimArray (element_type, sizes[0]);
545 result = _Jv_NewObjectArray (sizes[0], element_type, NULL);
549 JvAssert (! element_type->isPrimitive());
550 JvAssert (element_type->isArray());
551 jobject *contents = elements ((jobjectArray) result);
552 for (int i = 0; i < sizes[0]; ++i)
553 contents[i] = _Jv_NewMultiArrayUnchecked (element_type, dimensions - 1,
561 _Jv_NewMultiArray (jclass type, jint dimensions, jint *sizes)
563 for (int i = 0; i < dimensions; ++i)
565 throw new java::lang::NegativeArraySizeException;
567 return _Jv_NewMultiArrayUnchecked (type, dimensions, sizes);
571 _Jv_NewMultiArray (jclass array_type, jint dimensions, ...)
574 jint sizes[dimensions];
575 va_start (args, dimensions);
576 for (int i = 0; i < dimensions; ++i)
578 jint size = va_arg (args, jint);
580 throw new java::lang::NegativeArraySizeException;
585 return _Jv_NewMultiArrayUnchecked (array_type, dimensions, sizes);
590 // Ensure 8-byte alignment, for hash synchronization.
591 #define DECLARE_PRIM_TYPE(NAME) \
592 _Jv_ArrayVTable _Jv_##NAME##VTable; \
593 java::lang::Class _Jv_##NAME##Class __attribute__ ((aligned (8)));
595 DECLARE_PRIM_TYPE(byte);
596 DECLARE_PRIM_TYPE(short);
597 DECLARE_PRIM_TYPE(int);
598 DECLARE_PRIM_TYPE(long);
599 DECLARE_PRIM_TYPE(boolean);
600 DECLARE_PRIM_TYPE(char);
601 DECLARE_PRIM_TYPE(float);
602 DECLARE_PRIM_TYPE(double);
603 DECLARE_PRIM_TYPE(void);
606 _Jv_InitPrimClass (jclass cl, char *cname, char sig, int len,
607 _Jv_ArrayVTable *array_vtable)
609 using namespace java::lang::reflect;
611 _Jv_InitNewClassFields (cl);
613 // We must set the vtable for the class; the Java constructor
615 (*(_Jv_VTable **) cl) = java::lang::Class::class$.vtable;
617 // Initialize the fields we care about. We do this in the same
618 // order they are declared in Class.h.
619 cl->name = _Jv_makeUtf8Const ((char *) cname, -1);
620 cl->accflags = Modifier::PUBLIC | Modifier::FINAL | Modifier::ABSTRACT;
621 cl->method_count = sig;
622 cl->size_in_bytes = len;
623 cl->vtable = JV_PRIMITIVE_VTABLE;
624 cl->state = JV_STATE_DONE;
627 _Jv_NewArrayClass (cl, NULL, (_Jv_VTable *) array_vtable);
631 _Jv_FindClassFromSignature (char *sig, java::lang::ClassLoader *loader)
636 return JvPrimClass (byte);
638 return JvPrimClass (short);
640 return JvPrimClass (int);
642 return JvPrimClass (long);
644 return JvPrimClass (boolean);
646 return JvPrimClass (char);
648 return JvPrimClass (float);
650 return JvPrimClass (double);
652 return JvPrimClass (void);
656 for (i = 1; sig[i] && sig[i] != ';'; ++i)
658 _Jv_Utf8Const *name = _Jv_makeUtf8Const (&sig[1], i - 1);
659 return _Jv_FindClass (name, loader);
663 jclass klass = _Jv_FindClassFromSignature (&sig[1], loader);
666 return _Jv_GetArrayClass (klass, loader);
670 return NULL; // Placate compiler.
676 JvConvertArgv (int argc, const char **argv)
680 jobjectArray ar = JvNewObjectArray(argc, &StringClass, NULL);
681 jobject *ptr = elements(ar);
682 jbyteArray bytes = NULL;
683 for (int i = 0; i < argc; i++)
685 const char *arg = argv[i];
686 int len = strlen (arg);
687 if (bytes == NULL || bytes->length < len)
688 bytes = JvNewByteArray (len);
689 jbyte *bytePtr = elements (bytes);
690 // We assume jbyte == char.
691 memcpy (bytePtr, arg, len);
693 // Now convert using the default encoding.
694 *ptr++ = new java::lang::String (bytes, 0, len);
696 return (JArray<jstring>*) ar;
699 // FIXME: These variables are static so that they will be
700 // automatically scanned by the Boehm collector. This is needed
701 // because with qthreads the collector won't scan the initial stack --
702 // it will only scan the qthreads stacks.
704 // Command line arguments.
705 static JArray<jstring> *arg_vec;
707 // The primary thread.
708 static java::lang::Thread *main_thread;
711 _Jv_ThisExecutable (void)
717 _Jv_ThisExecutable (const char *name)
721 _Jv_execName = (char *) _Jv_Malloc (strlen (name) + 1);
722 strcpy (_Jv_execName, name);
726 #ifndef DISABLE_GETENV_PROPERTIES
729 next_property_key (char *s, size_t *length)
735 // Skip over whitespace
739 // If we've reached the end, return NULL. Also return NULL if for
740 // some reason we've come across a malformed property string.
746 // Determine the length of the property key.
764 next_property_value (char *s, size_t *length)
780 // If we've reached the end, return NULL.
784 // Determine the length of the property value.
803 process_gcj_properties ()
805 char *props = getenv("GCJ_PROPERTIES");
808 size_t property_count = 0;
813 // Whip through props quickly in order to count the number of
815 while (p && (p = next_property_key (p, &length)))
817 // Skip to the end of the key
820 p = next_property_value (p, &length);
827 // Allocate an array of property value/key pairs.
828 _Jv_Environment_Properties =
829 (property_pair *) malloc (sizeof(property_pair)
830 * (property_count + 1));
832 // Go through the properties again, initializing _Jv_Properties
836 while (p && (p = next_property_key (p, &length)))
838 _Jv_Environment_Properties[property_count].key = p;
839 _Jv_Environment_Properties[property_count].key_length = length;
841 // Skip to the end of the key
844 p = next_property_value (p, &length);
846 _Jv_Environment_Properties[property_count].value = p;
847 _Jv_Environment_Properties[property_count].value_length = length;
854 memset ((void *) &_Jv_Environment_Properties[property_count],
855 0, sizeof (property_pair));
859 // Null terminate the strings.
860 while (_Jv_Environment_Properties[i].key)
862 _Jv_Environment_Properties[i].key[_Jv_Environment_Properties[i].key_length] = 0;
863 _Jv_Environment_Properties[i++].value[_Jv_Environment_Properties[i].value_length] = 0;
867 #endif // DISABLE_GETENV_PROPERTIES
871 _Jv_Utf8Const *void_signature;
872 _Jv_Utf8Const *clinit_name;
873 _Jv_Utf8Const *init_name;
874 _Jv_Utf8Const *finit_name;
876 bool runtimeInitialized = false;
880 _Jv_CreateJavaVM (void* /*vm_args*/)
884 if (runtimeInitialized)
887 runtimeInitialized = true;
889 PROCESS_GCJ_PROPERTIES;
893 _Jv_InitializeSyncMutex ();
895 /* Initialize Utf8 constants declared in jvm.h. */
896 void_signature = _Jv_makeUtf8Const ("()V", 3);
897 clinit_name = _Jv_makeUtf8Const ("<clinit>", 8);
898 init_name = _Jv_makeUtf8Const ("<init>", 6);
899 finit_name = _Jv_makeUtf8Const ("finit$", 6);
901 /* Initialize built-in classes to represent primitive TYPEs. */
902 _Jv_InitPrimClass (&_Jv_byteClass, "byte", 'B', 1, &_Jv_byteVTable);
903 _Jv_InitPrimClass (&_Jv_shortClass, "short", 'S', 2, &_Jv_shortVTable);
904 _Jv_InitPrimClass (&_Jv_intClass, "int", 'I', 4, &_Jv_intVTable);
905 _Jv_InitPrimClass (&_Jv_longClass, "long", 'J', 8, &_Jv_longVTable);
906 _Jv_InitPrimClass (&_Jv_booleanClass, "boolean", 'Z', 1, &_Jv_booleanVTable);
907 _Jv_InitPrimClass (&_Jv_charClass, "char", 'C', 2, &_Jv_charVTable);
908 _Jv_InitPrimClass (&_Jv_floatClass, "float", 'F', 4, &_Jv_floatVTable);
909 _Jv_InitPrimClass (&_Jv_doubleClass, "double", 'D', 8, &_Jv_doubleVTable);
910 _Jv_InitPrimClass (&_Jv_voidClass, "void", 'V', 0, &_Jv_voidVTable);
912 // Turn stack trace generation off while creating exception objects.
913 _Jv_InitClass (&java::lang::VMThrowable::class$);
914 java::lang::VMThrowable::trace_enabled = 0;
920 arithexception = new java::lang::ArithmeticException
921 (JvNewStringLatin1 ("/ by zero"));
924 no_memory = new java::lang::OutOfMemoryError;
926 java::lang::VMThrowable::trace_enabled = 1;
929 LTDL_SET_PRELOADED_SYMBOLS ();
932 _Jv_platform_initialize ();
936 _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady);
938 // Start the GC finalizer thread. A VirtualMachineError can be
939 // thrown by the runtime if, say, threads aren't available. In this
940 // case finalizers simply won't run.
943 using namespace gnu::gcj::runtime;
944 FinalizerThread *ft = new FinalizerThread ();
947 catch (java::lang::VirtualMachineError *ignore)
955 _Jv_RunMain (jclass klass, const char *name, int argc, const char **argv,
961 java::lang::Runtime *runtime = NULL;
964 #ifdef DISABLE_MAIN_ARGS
965 _Jv_ThisExecutable ("[Embedded App]");
967 #ifdef HAVE_PROC_SELF_EXE
969 sprintf (exec_name, "/proc/%d/exe", getpid ());
970 _Jv_ThisExecutable (exec_name);
972 _Jv_ThisExecutable (argv[0]);
973 #endif /* HAVE_PROC_SELF_EXE */
974 #endif /* DISABLE_MAIN_ARGS */
978 // Set this very early so that it is seen when java.lang.System
981 _Jv_Jar_Class_Path = strdup (name);
982 _Jv_CreateJavaVM (NULL);
984 // Get the Runtime here. We want to initialize it before searching
985 // for `main'; that way it will be set up if `main' is a JNI method.
986 runtime = java::lang::Runtime::getRuntime ();
988 #ifdef DISABLE_MAIN_ARGS
989 arg_vec = JvConvertArgv (0, 0);
991 arg_vec = JvConvertArgv (argc - 1, argv + 1);
994 using namespace gnu::gcj::runtime;
996 main_thread = new FirstThread (klass, arg_vec);
998 main_thread = new FirstThread (JvNewStringLatin1 (name),
1001 catch (java::lang::Throwable *t)
1003 java::lang::System::err->println (JvNewStringLatin1
1004 ("Exception during runtime initialization"));
1005 t->printStackTrace();
1009 _Jv_AttachCurrentThread (main_thread);
1010 _Jv_ThreadRun (main_thread);
1013 int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
1014 runtime->exit (status);
1018 JvRunMain (jclass klass, int argc, const char **argv)
1020 _Jv_RunMain (klass, NULL, argc, argv, false);
1025 // Parse a string and return a heap size.
1027 parse_heap_size (const char *spec)
1030 unsigned long val = strtoul (spec, &end, 10);
1031 if (*end == 'k' || *end == 'K')
1033 else if (*end == 'm' || *end == 'M')
1035 return (size_t) val;
1038 // Set the initial heap size. This might be ignored by the GC layer.
1039 // This must be called before _Jv_RunMain.
1041 _Jv_SetInitialHeapSize (const char *arg)
1043 size_t size = parse_heap_size (arg);
1044 _Jv_GCSetInitialHeapSize (size);
1047 // Set the maximum heap size. This might be ignored by the GC layer.
1048 // This must be called before _Jv_RunMain.
1050 _Jv_SetMaximumHeapSize (const char *arg)
1052 size_t size = parse_heap_size (arg);
1053 _Jv_GCSetMaximumHeapSize (size);
1059 _Jv_Malloc (jsize size)
1061 if (__builtin_expect (size == 0, false))
1063 void *ptr = malloc ((size_t) size);
1064 if (__builtin_expect (ptr == NULL, false))
1070 _Jv_Realloc (void *ptr, jsize size)
1072 if (__builtin_expect (size == 0, false))
1074 ptr = realloc (ptr, (size_t) size);
1075 if (__builtin_expect (ptr == NULL, false))
1081 _Jv_MallocUnchecked (jsize size)
1083 if (__builtin_expect (size == 0, false))
1085 return malloc ((size_t) size);
1089 _Jv_Free (void* ptr)
1096 // In theory, these routines can be #ifdef'd away on machines which
1097 // support divide overflow signals. However, we never know if some
1098 // code might have been compiled with "-fuse-divide-subroutine", so we
1099 // always include them in libgcj.
1102 _Jv_divI (jint dividend, jint divisor)
1104 if (__builtin_expect (divisor == 0, false))
1105 _Jv_ThrowSignal (arithexception);
1107 if (dividend == (jint) 0x80000000L && divisor == -1)
1110 return dividend / divisor;
1114 _Jv_remI (jint dividend, jint divisor)
1116 if (__builtin_expect (divisor == 0, false))
1117 _Jv_ThrowSignal (arithexception);
1119 if (dividend == (jint) 0x80000000L && divisor == -1)
1122 return dividend % divisor;
1126 _Jv_divJ (jlong dividend, jlong divisor)
1128 if (__builtin_expect (divisor == 0, false))
1129 _Jv_ThrowSignal (arithexception);
1131 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1134 return dividend / divisor;
1138 _Jv_remJ (jlong dividend, jlong divisor)
1140 if (__builtin_expect (divisor == 0, false))
1141 _Jv_ThrowSignal (arithexception);
1143 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1146 return dividend % divisor;