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/reflect/Modifier.h>
57 #include <java/io/PrintStream.h>
58 #include <java/lang/UnsatisfiedLinkError.h>
59 #include <java/lang/VirtualMachineError.h>
60 #include <gnu/gcj/runtime/VMClassLoader.h>
61 #include <gnu/gcj/runtime/FinalizerThread.h>
62 #include <gnu/gcj/runtime/FirstThread.h>
68 // We allocate a single OutOfMemoryError exception which we keep
69 // around for use if we run out of memory.
70 static java::lang::OutOfMemoryError *no_memory;
72 // Largest representable size_t.
73 #define SIZE_T_MAX ((size_t) (~ (size_t) 0))
75 static const char *no_properties[] = { NULL };
77 // Properties set at compile time.
78 const char **_Jv_Compiler_Properties = no_properties;
80 // The JAR file to add to the beginning of java.class.path.
81 const char *_Jv_Jar_Class_Path;
83 #ifndef DISABLE_GETENV_PROPERTIES
84 // Property key/value pairs.
85 property_pair *_Jv_Environment_Properties;
88 // The name of this executable.
89 static char *_Jv_execName;
91 // Stash the argv pointer to benefit native libraries that need it.
92 const char **_Jv_argv;
96 // Pointer to JVMPI notification functions.
97 void (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (JVMPI_Event *event);
98 void (*_Jv_JVMPI_Notify_THREAD_START) (JVMPI_Event *event);
99 void (*_Jv_JVMPI_Notify_THREAD_END) (JVMPI_Event *event);
103 extern "C" void _Jv_ThrowSignal (jthrowable) __attribute ((noreturn));
105 // Just like _Jv_Throw, but fill in the stack trace first. Although
106 // this is declared extern in order that its name not be mangled, it
107 // is not intended to be used outside this file.
109 _Jv_ThrowSignal (jthrowable throwable)
111 throwable->fillInStackTrace ();
116 static java::lang::NullPointerException *nullp;
118 SIGNAL_HANDLER (catch_segv)
120 MAKE_THROW_FRAME (nullp);
121 _Jv_ThrowSignal (nullp);
125 static java::lang::ArithmeticException *arithexception;
128 SIGNAL_HANDLER (catch_fpe)
130 #ifdef HANDLE_DIVIDE_OVERFLOW
131 HANDLE_DIVIDE_OVERFLOW;
133 MAKE_THROW_FRAME (arithexception);
135 _Jv_ThrowSignal (arithexception);
142 _Jv_equalUtf8Consts (Utf8Const* a, Utf8Const *b)
145 _Jv_ushort *aptr, *bptr;
148 if (a->hash != b->hash)
151 if (b->length != len)
153 aptr = (_Jv_ushort *)a->data;
154 bptr = (_Jv_ushort *)b->data;
155 len = (len + 1) >> 1;
157 if (*aptr++ != *bptr++)
162 /* True iff A is equal to STR.
163 HASH is STR->hashCode().
167 _Jv_equal (Utf8Const* a, jstring str, jint hash)
169 if (a->hash != (_Jv_ushort) hash)
171 jint len = str->length();
173 jchar *sptr = _Jv_GetStringChars (str);
174 unsigned char* ptr = (unsigned char*) a->data;
175 unsigned char* limit = ptr + a->length;
178 int ch = UTF8_GET (ptr, limit);
187 /* Like _Jv_equal, but stop after N characters. */
189 _Jv_equaln (Utf8Const *a, jstring str, jint n)
191 jint len = str->length();
193 jchar *sptr = _Jv_GetStringChars (str);
194 unsigned char* ptr = (unsigned char*) a->data;
195 unsigned char* limit = ptr + a->length;
196 for (; n-- > 0; i++, sptr++)
198 int ch = UTF8_GET (ptr, limit);
207 /* Count the number of Unicode chars encoded in a given Ut8 string. */
209 _Jv_strLengthUtf8(char* str, int len)
212 unsigned char* limit;
215 ptr = (unsigned char*) str;
218 for (; ptr < limit; str_length++)
220 if (UTF8_GET (ptr, limit) < 0)
226 /* Calculate a hash value for a string encoded in Utf8 format.
227 * This returns the same hash value as specified or java.lang.String.hashCode.
230 hashUtf8String (char* str, int len)
232 unsigned char* ptr = (unsigned char*) str;
233 unsigned char* limit = ptr + len;
238 int ch = UTF8_GET (ptr, limit);
239 /* Updated specification from
240 http://www.javasoft.com/docs/books/jls/clarify.html. */
241 hash = (31 * hash) + ch;
247 _Jv_makeUtf8Const (char* s, int len)
251 Utf8Const* m = (Utf8Const*) _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
252 memcpy (m->data, s, len);
255 m->hash = hashUtf8String (s, len) & 0xFFFF;
260 _Jv_makeUtf8Const (jstring string)
262 jint hash = string->hashCode ();
263 jint len = _Jv_GetStringUTFLength (string);
265 Utf8Const* m = (Utf8Const*)
266 _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
271 _Jv_GetStringUTFRegion (string, 0, string->length (), m->data);
281 _Jv_Abort (const char *function, const char *file, int line,
285 _Jv_Abort (const char *, const char *, int, const char *message)
290 "libgcj failure: %s\n in function %s, file %s, line %d\n",
291 message, function, file, line);
293 fprintf (stderr, "libgcj failure: %s\n", message);
299 fail_on_finalization (jobject)
301 JvFail ("object was finalized");
305 _Jv_GCWatch (jobject obj)
307 _Jv_RegisterFinalizer (obj, fail_on_finalization);
311 _Jv_ThrowBadArrayIndex(jint bad_index)
313 throw new java::lang::ArrayIndexOutOfBoundsException
314 (java::lang::String::valueOf (bad_index));
318 _Jv_ThrowNullPointerException ()
320 throw new java::lang::NullPointerException;
323 // Explicitly throw a no memory exception.
324 // The collector calls this when it encounters an out-of-memory condition.
325 void _Jv_ThrowNoMemory()
332 jvmpi_notify_alloc(jclass klass, jint size, jobject obj)
334 // Service JVMPI allocation request.
335 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
339 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
341 event.u.obj_alloc.arena_id = 0;
342 event.u.obj_alloc.class_id = (jobjectID) klass;
343 event.u.obj_alloc.is_array = 0;
344 event.u.obj_alloc.size = size;
345 event.u.obj_alloc.obj_id = (jobjectID) obj;
347 // FIXME: This doesn't look right for the Boehm GC. A GC may
348 // already be in progress. _Jv_DisableGC () doesn't wait for it.
349 // More importantly, I don't see the need for disabling GC, since we
350 // blatantly have a pointer to obj on our stack, ensuring that the
351 // object can't be collected. Even for a nonconservative collector,
352 // it appears to me that this must be true, since we are about to
353 // return obj. Isn't this whole approach way too intrusive for
354 // a useful profiling interface? - HB
356 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
360 #else /* !ENABLE_JVMPI */
361 # define jvmpi_notify_alloc(klass,size,obj) /* do nothing */
364 // Allocate a new object of class KLASS. SIZE is the size of the object
365 // to allocate. You might think this is redundant, but it isn't; some
366 // classes, such as String, aren't of fixed size.
367 // First a version that assumes that we have no finalizer, and that
368 // the class is already initialized.
369 // If we know that JVMPI is disabled, this can be replaced by a direct call
370 // to the allocator for the appropriate GC.
372 _Jv_AllocObjectNoInitNoFinalizer (jclass klass, jint size)
374 jobject obj = (jobject) _Jv_AllocObj (size, klass);
375 jvmpi_notify_alloc (klass, size, obj);
379 // And now a version that initializes if necessary.
381 _Jv_AllocObjectNoFinalizer (jclass klass, jint size)
383 _Jv_InitClass (klass);
384 jobject obj = (jobject) _Jv_AllocObj (size, klass);
385 jvmpi_notify_alloc (klass, size, obj);
389 // And now the general version that registers a finalizer if necessary.
391 _Jv_AllocObject (jclass klass, jint size)
393 jobject obj = _Jv_AllocObjectNoFinalizer (klass, size);
395 // We assume that the compiler only generates calls to this routine
396 // if there really is an interesting finalizer.
397 // Unfortunately, we still have to the dynamic test, since there may
398 // be cni calls to this routine.
399 // Nore that on IA64 get_finalizer() returns the starting address of the
400 // function, not a function pointer. Thus this still works.
401 if (klass->vtable->get_finalizer ()
402 != java::lang::Object::class$.vtable->get_finalizer ())
403 _Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
407 // A version of the above that assumes the object contains no pointers,
408 // and requires no finalization. This can't happen if we need pointers
410 #ifdef JV_HASH_SYNCHRONIZATION
412 _Jv_AllocPtrFreeObject (jclass klass, jint size)
414 _Jv_InitClass (klass);
416 jobject obj = (jobject) _Jv_AllocPtrFreeObj (size, klass);
419 // Service JVMPI request.
421 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
425 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
427 event.u.obj_alloc.arena_id = 0;
428 event.u.obj_alloc.class_id = (jobjectID) klass;
429 event.u.obj_alloc.is_array = 0;
430 event.u.obj_alloc.size = size;
431 event.u.obj_alloc.obj_id = (jobjectID) obj;
434 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
441 #endif /* JV_HASH_SYNCHRONIZATION */
444 // Allocate a new array of Java objects. Each object is of type
445 // `elementClass'. `init' is used to initialize each slot in the
448 _Jv_NewObjectArray (jsize count, jclass elementClass, jobject init)
450 if (__builtin_expect (count < 0, false))
451 throw new java::lang::NegativeArraySizeException;
453 JvAssert (! elementClass->isPrimitive ());
455 // Ensure that elements pointer is properly aligned.
456 jobjectArray obj = NULL;
457 size_t size = (size_t) elements (obj);
458 size += count * sizeof (jobject);
460 // FIXME: second argument should be "current loader"
461 jclass klass = _Jv_GetArrayClass (elementClass, 0);
463 obj = (jobjectArray) _Jv_AllocArray (size, klass);
465 jsize *lp = const_cast<jsize *> (&obj->length);
467 // We know the allocator returns zeroed memory. So don't bother
471 jobject *ptr = elements(obj);
478 // Allocate a new array of primitives. ELTYPE is the type of the
479 // element, COUNT is the size of the array.
481 _Jv_NewPrimArray (jclass eltype, jint count)
483 int elsize = eltype->size();
484 if (__builtin_expect (count < 0, false))
485 throw new java::lang::NegativeArraySizeException;
487 JvAssert (eltype->isPrimitive ());
488 jobject dummy = NULL;
489 size_t size = (size_t) _Jv_GetArrayElementFromElementType (dummy, eltype);
491 // Check for overflow.
492 if (__builtin_expect ((size_t) count >
493 (SIZE_T_MAX - size) / elsize, false))
496 jclass klass = _Jv_GetArrayClass (eltype, 0);
498 # ifdef JV_HASH_SYNCHRONIZATION
499 // Since the vtable is always statically allocated,
500 // these are completely pointerfree! Make sure the GC doesn't touch them.
502 (__JArray*) _Jv_AllocPtrFreeObj (size + elsize * count, klass);
503 memset((char *)arr + size, 0, elsize * count);
505 __JArray *arr = (__JArray*) _Jv_AllocObj (size + elsize * count, klass);
506 // Note that we assume we are given zeroed memory by the allocator.
509 jsize *lp = const_cast<jsize *> (&arr->length);
516 _Jv_NewArray (jint type, jint size)
520 case 4: return JvNewBooleanArray (size);
521 case 5: return JvNewCharArray (size);
522 case 6: return JvNewFloatArray (size);
523 case 7: return JvNewDoubleArray (size);
524 case 8: return JvNewByteArray (size);
525 case 9: return JvNewShortArray (size);
526 case 10: return JvNewIntArray (size);
527 case 11: return JvNewLongArray (size);
529 throw new java::lang::InternalError
530 (JvNewStringLatin1 ("invalid type code in _Jv_NewArray"));
533 // Allocate a possibly multi-dimensional array but don't check that
534 // any array length is <0.
536 _Jv_NewMultiArrayUnchecked (jclass type, jint dimensions, jint *sizes)
538 JvAssert (type->isArray());
539 jclass element_type = type->getComponentType();
541 if (element_type->isPrimitive())
542 result = _Jv_NewPrimArray (element_type, sizes[0]);
544 result = _Jv_NewObjectArray (sizes[0], element_type, NULL);
548 JvAssert (! element_type->isPrimitive());
549 JvAssert (element_type->isArray());
550 jobject *contents = elements ((jobjectArray) result);
551 for (int i = 0; i < sizes[0]; ++i)
552 contents[i] = _Jv_NewMultiArrayUnchecked (element_type, dimensions - 1,
560 _Jv_NewMultiArray (jclass type, jint dimensions, jint *sizes)
562 for (int i = 0; i < dimensions; ++i)
564 throw new java::lang::NegativeArraySizeException;
566 return _Jv_NewMultiArrayUnchecked (type, dimensions, sizes);
570 _Jv_NewMultiArray (jclass array_type, jint dimensions, ...)
573 jint sizes[dimensions];
574 va_start (args, dimensions);
575 for (int i = 0; i < dimensions; ++i)
577 jint size = va_arg (args, jint);
579 throw new java::lang::NegativeArraySizeException;
584 return _Jv_NewMultiArrayUnchecked (array_type, dimensions, sizes);
589 #define DECLARE_PRIM_TYPE(NAME) \
590 _Jv_ArrayVTable _Jv_##NAME##VTable; \
591 java::lang::Class _Jv_##NAME##Class;
593 DECLARE_PRIM_TYPE(byte);
594 DECLARE_PRIM_TYPE(short);
595 DECLARE_PRIM_TYPE(int);
596 DECLARE_PRIM_TYPE(long);
597 DECLARE_PRIM_TYPE(boolean);
598 DECLARE_PRIM_TYPE(char);
599 DECLARE_PRIM_TYPE(float);
600 DECLARE_PRIM_TYPE(double);
601 DECLARE_PRIM_TYPE(void);
604 _Jv_InitPrimClass (jclass cl, char *cname, char sig, int len,
605 _Jv_ArrayVTable *array_vtable)
607 using namespace java::lang::reflect;
609 _Jv_InitNewClassFields (cl);
611 // We must set the vtable for the class; the Java constructor
613 (*(_Jv_VTable **) cl) = java::lang::Class::class$.vtable;
615 // Initialize the fields we care about. We do this in the same
616 // order they are declared in Class.h.
617 cl->name = _Jv_makeUtf8Const ((char *) cname, -1);
618 cl->accflags = Modifier::PUBLIC | Modifier::FINAL | Modifier::ABSTRACT;
619 cl->method_count = sig;
620 cl->size_in_bytes = len;
621 cl->vtable = JV_PRIMITIVE_VTABLE;
622 cl->state = JV_STATE_DONE;
625 _Jv_NewArrayClass (cl, NULL, (_Jv_VTable *) array_vtable);
629 _Jv_FindClassFromSignature (char *sig, java::lang::ClassLoader *loader)
634 return JvPrimClass (byte);
636 return JvPrimClass (short);
638 return JvPrimClass (int);
640 return JvPrimClass (long);
642 return JvPrimClass (boolean);
644 return JvPrimClass (char);
646 return JvPrimClass (float);
648 return JvPrimClass (double);
650 return JvPrimClass (void);
654 for (i = 1; sig[i] && sig[i] != ';'; ++i)
656 _Jv_Utf8Const *name = _Jv_makeUtf8Const (&sig[1], i - 1);
657 return _Jv_FindClass (name, loader);
662 jclass klass = _Jv_FindClassFromSignature (&sig[1], loader);
665 return _Jv_GetArrayClass (klass, loader);
669 return NULL; // Placate compiler.
675 JvConvertArgv (int argc, const char **argv)
679 jobjectArray ar = JvNewObjectArray(argc, &StringClass, NULL);
680 jobject *ptr = elements(ar);
681 jbyteArray bytes = NULL;
682 for (int i = 0; i < argc; i++)
684 const char *arg = argv[i];
685 int len = strlen (arg);
686 if (bytes == NULL || bytes->length < len)
687 bytes = JvNewByteArray (len);
688 jbyte *bytePtr = elements (bytes);
689 // We assume jbyte == char.
690 memcpy (bytePtr, arg, len);
692 // Now convert using the default encoding.
693 *ptr++ = new java::lang::String (bytes, 0, len);
695 return (JArray<jstring>*) ar;
698 // FIXME: These variables are static so that they will be
699 // automatically scanned by the Boehm collector. This is needed
700 // because with qthreads the collector won't scan the initial stack --
701 // it will only scan the qthreads stacks.
703 // Command line arguments.
704 static JArray<jstring> *arg_vec;
706 // The primary thread.
707 static java::lang::Thread *main_thread;
710 _Jv_ThisExecutable (void)
716 _Jv_ThisExecutable (const char *name)
720 _Jv_execName = (char *) _Jv_Malloc (strlen (name) + 1);
721 strcpy (_Jv_execName, name);
725 #ifndef DISABLE_GETENV_PROPERTIES
728 next_property_key (char *s, size_t *length)
734 // Skip over whitespace
738 // If we've reached the end, return NULL. Also return NULL if for
739 // some reason we've come across a malformed property string.
745 // Determine the length of the property key.
763 next_property_value (char *s, size_t *length)
779 // If we've reached the end, return NULL.
783 // Determine the length of the property value.
802 process_gcj_properties ()
804 char *props = getenv("GCJ_PROPERTIES");
807 size_t property_count = 0;
812 // Whip through props quickly in order to count the number of
814 while (p && (p = next_property_key (p, &length)))
816 // Skip to the end of the key
819 p = next_property_value (p, &length);
826 // Allocate an array of property value/key pairs.
827 _Jv_Environment_Properties =
828 (property_pair *) malloc (sizeof(property_pair)
829 * (property_count + 1));
831 // Go through the properties again, initializing _Jv_Properties
835 while (p && (p = next_property_key (p, &length)))
837 _Jv_Environment_Properties[property_count].key = p;
838 _Jv_Environment_Properties[property_count].key_length = length;
840 // Skip to the end of the key
843 p = next_property_value (p, &length);
845 _Jv_Environment_Properties[property_count].value = p;
846 _Jv_Environment_Properties[property_count].value_length = length;
853 memset ((void *) &_Jv_Environment_Properties[property_count],
854 0, sizeof (property_pair));
858 // Null terminate the strings.
859 while (_Jv_Environment_Properties[i].key)
861 _Jv_Environment_Properties[i].key[_Jv_Environment_Properties[i].key_length] = 0;
862 _Jv_Environment_Properties[i++].value[_Jv_Environment_Properties[i].value_length] = 0;
866 #endif // DISABLE_GETENV_PROPERTIES
870 _Jv_Utf8Const *void_signature;
871 _Jv_Utf8Const *clinit_name;
872 _Jv_Utf8Const *init_name;
873 _Jv_Utf8Const *finit_name;
875 bool runtimeInitialized = false;
879 _Jv_CreateJavaVM (void* /*vm_args*/)
883 if (runtimeInitialized)
886 runtimeInitialized = true;
888 PROCESS_GCJ_PROPERTIES;
892 _Jv_InitializeSyncMutex ();
894 /* Initialize Utf8 constants declared in jvm.h. */
895 void_signature = _Jv_makeUtf8Const ("()V", 3);
896 clinit_name = _Jv_makeUtf8Const ("<clinit>", 8);
897 init_name = _Jv_makeUtf8Const ("<init>", 6);
898 finit_name = _Jv_makeUtf8Const ("finit$", 6);
900 /* Initialize built-in classes to represent primitive TYPEs. */
901 _Jv_InitPrimClass (&_Jv_byteClass, "byte", 'B', 1, &_Jv_byteVTable);
902 _Jv_InitPrimClass (&_Jv_shortClass, "short", 'S', 2, &_Jv_shortVTable);
903 _Jv_InitPrimClass (&_Jv_intClass, "int", 'I', 4, &_Jv_intVTable);
904 _Jv_InitPrimClass (&_Jv_longClass, "long", 'J', 8, &_Jv_longVTable);
905 _Jv_InitPrimClass (&_Jv_booleanClass, "boolean", 'Z', 1, &_Jv_booleanVTable);
906 _Jv_InitPrimClass (&_Jv_charClass, "char", 'C', 2, &_Jv_charVTable);
907 _Jv_InitPrimClass (&_Jv_floatClass, "float", 'F', 4, &_Jv_floatVTable);
908 _Jv_InitPrimClass (&_Jv_doubleClass, "double", 'D', 8, &_Jv_doubleVTable);
909 _Jv_InitPrimClass (&_Jv_voidClass, "void", 'V', 0, &_Jv_voidVTable);
911 // Turn stack trace generation off while creating exception objects.
912 _Jv_InitClass (&java::lang::Throwable::class$);
913 java::lang::Throwable::trace_enabled = 0;
919 arithexception = new java::lang::ArithmeticException
920 (JvNewStringLatin1 ("/ by zero"));
923 no_memory = new java::lang::OutOfMemoryError;
925 java::lang::Throwable::trace_enabled = 1;
928 LTDL_SET_PRELOADED_SYMBOLS ();
931 _Jv_platform_initialize ();
935 _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady);
937 // Start the GC finalizer thread. A VirtualMachineError can be
938 // thrown by the runtime if, say, threads aren't available. In this
939 // case finalizers simply won't run.
942 using namespace gnu::gcj::runtime;
943 FinalizerThread *ft = new FinalizerThread ();
946 catch (java::lang::VirtualMachineError *ignore)
954 _Jv_RunMain (jclass klass, const char *name, int argc, const char **argv,
960 java::lang::Runtime *runtime = NULL;
963 #ifdef DISABLE_MAIN_ARGS
964 _Jv_ThisExecutable ("[Embedded App]");
966 #ifdef HAVE_PROC_SELF_EXE
968 sprintf (exec_name, "/proc/%d/exe", getpid ());
969 _Jv_ThisExecutable (exec_name);
971 _Jv_ThisExecutable (argv[0]);
972 #endif /* HAVE_PROC_SELF_EXE */
973 #endif /* DISABLE_MAIN_ARGS */
977 // Set this very early so that it is seen when java.lang.System
980 _Jv_Jar_Class_Path = strdup (name);
981 _Jv_CreateJavaVM (NULL);
983 // Get the Runtime here. We want to initialize it before searching
984 // for `main'; that way it will be set up if `main' is a JNI method.
985 runtime = java::lang::Runtime::getRuntime ();
987 #ifdef DISABLE_MAIN_ARGS
988 arg_vec = JvConvertArgv (0, 0);
990 arg_vec = JvConvertArgv (argc - 1, argv + 1);
993 using namespace gnu::gcj::runtime;
995 main_thread = new FirstThread (klass, arg_vec);
997 main_thread = new FirstThread (JvNewStringLatin1 (name),
1000 catch (java::lang::Throwable *t)
1002 java::lang::System::err->println (JvNewStringLatin1
1003 ("Exception during runtime initialization"));
1004 t->printStackTrace();
1008 _Jv_AttachCurrentThread (main_thread);
1009 _Jv_ThreadRun (main_thread);
1012 int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
1013 runtime->exit (status);
1017 JvRunMain (jclass klass, int argc, const char **argv)
1019 _Jv_RunMain (klass, NULL, argc, argv, false);
1024 // Parse a string and return a heap size.
1026 parse_heap_size (const char *spec)
1029 unsigned long val = strtoul (spec, &end, 10);
1030 if (*end == 'k' || *end == 'K')
1032 else if (*end == 'm' || *end == 'M')
1034 return (size_t) val;
1037 // Set the initial heap size. This might be ignored by the GC layer.
1038 // This must be called before _Jv_RunMain.
1040 _Jv_SetInitialHeapSize (const char *arg)
1042 size_t size = parse_heap_size (arg);
1043 _Jv_GCSetInitialHeapSize (size);
1046 // Set the maximum heap size. This might be ignored by the GC layer.
1047 // This must be called before _Jv_RunMain.
1049 _Jv_SetMaximumHeapSize (const char *arg)
1051 size_t size = parse_heap_size (arg);
1052 _Jv_GCSetMaximumHeapSize (size);
1058 _Jv_Malloc (jsize size)
1060 if (__builtin_expect (size == 0, false))
1062 void *ptr = malloc ((size_t) size);
1063 if (__builtin_expect (ptr == NULL, false))
1069 _Jv_Realloc (void *ptr, jsize size)
1071 if (__builtin_expect (size == 0, false))
1073 ptr = realloc (ptr, (size_t) size);
1074 if (__builtin_expect (ptr == NULL, false))
1080 _Jv_MallocUnchecked (jsize size)
1082 if (__builtin_expect (size == 0, false))
1084 return malloc ((size_t) size);
1088 _Jv_Free (void* ptr)
1095 // In theory, these routines can be #ifdef'd away on machines which
1096 // support divide overflow signals. However, we never know if some
1097 // code might have been compiled with "-fuse-divide-subroutine", so we
1098 // always include them in libgcj.
1101 _Jv_divI (jint dividend, jint divisor)
1103 if (__builtin_expect (divisor == 0, false))
1104 _Jv_ThrowSignal (arithexception);
1106 if (dividend == (jint) 0x80000000L && divisor == -1)
1109 return dividend / divisor;
1113 _Jv_remI (jint dividend, jint divisor)
1115 if (__builtin_expect (divisor == 0, false))
1116 _Jv_ThrowSignal (arithexception);
1118 if (dividend == (jint) 0x80000000L && divisor == -1)
1121 return dividend % divisor;
1125 _Jv_divJ (jlong dividend, jlong divisor)
1127 if (__builtin_expect (divisor == 0, false))
1128 _Jv_ThrowSignal (arithexception);
1130 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1133 return dividend / divisor;
1137 _Jv_remJ (jlong dividend, jlong divisor)
1139 if (__builtin_expect (divisor == 0, false))
1140 _Jv_ThrowSignal (arithexception);
1142 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1145 return dividend % divisor;