1 // prims.cc - Code for core of runtime environment.
3 /* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation
5 This file is part of libgcj.
7 This software is copyrighted work licensed under the terms of the
8 Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
26 #include <java-signal.h>
27 #include <java-threads.h>
31 #include <java/lang/ThreadGroup.h>
34 #ifndef DISABLE_GETENV_PROPERTIES
36 #include <java-props.h>
37 #define PROCESS_GCJ_PROPERTIES process_gcj_properties()
39 #define PROCESS_GCJ_PROPERTIES
40 #endif // DISABLE_GETENV_PROPERTIES
42 #include <java/lang/Class.h>
43 #include <java/lang/ClassLoader.h>
44 #include <java/lang/Runtime.h>
45 #include <java/lang/String.h>
46 #include <java/lang/Thread.h>
47 #include <java/lang/ThreadGroup.h>
48 #include <java/lang/ArrayIndexOutOfBoundsException.h>
49 #include <java/lang/ArithmeticException.h>
50 #include <java/lang/ClassFormatError.h>
51 #include <java/lang/InternalError.h>
52 #include <java/lang/NegativeArraySizeException.h>
53 #include <java/lang/NullPointerException.h>
54 #include <java/lang/OutOfMemoryError.h>
55 #include <java/lang/System.h>
56 #include <java/lang/VMThrowable.h>
57 #include <java/lang/reflect/Modifier.h>
58 #include <java/io/PrintStream.h>
59 #include <java/lang/UnsatisfiedLinkError.h>
60 #include <java/lang/VirtualMachineError.h>
61 #include <gnu/gcj/runtime/VMClassLoader.h>
62 #include <gnu/gcj/runtime/FinalizerThread.h>
63 #include <gnu/gcj/runtime/FirstThread.h>
69 // We allocate a single OutOfMemoryError exception which we keep
70 // around for use if we run out of memory.
71 static java::lang::OutOfMemoryError
*no_memory
;
73 // Largest representable size_t.
74 #define SIZE_T_MAX ((size_t) (~ (size_t) 0))
76 static const char *no_properties
[] = { NULL
};
78 // Properties set at compile time.
79 const char **_Jv_Compiler_Properties
= no_properties
;
81 // The JAR file to add to the beginning of java.class.path.
82 const char *_Jv_Jar_Class_Path
;
84 #ifndef DISABLE_GETENV_PROPERTIES
85 // Property key/value pairs.
86 property_pair
*_Jv_Environment_Properties
;
89 // Stash the argv pointer to benefit native libraries that need it.
90 const char **_Jv_argv
;
97 // _Jv_argc is 0 if not explicitly initialized.
102 _Jv_GetSafeArg (int index
)
104 if (index
>=0 && index
< _Jv_GetNbArgs ())
105 return _Jv_argv
[index
];
111 _Jv_SetArgs (int argc
, const char **argv
)
118 // Pointer to JVMPI notification functions.
119 void (*_Jv_JVMPI_Notify_OBJECT_ALLOC
) (JVMPI_Event
*event
);
120 void (*_Jv_JVMPI_Notify_THREAD_START
) (JVMPI_Event
*event
);
121 void (*_Jv_JVMPI_Notify_THREAD_END
) (JVMPI_Event
*event
);
125 /* Unblock a signal. Unless we do this, the signal may only be sent
128 unblock_signal (int signum
)
130 #ifdef _POSIX_VERSION
134 sigaddset (&sigs
, signum
);
135 sigprocmask (SIG_UNBLOCK
, &sigs
, NULL
);
140 SIGNAL_HANDLER (catch_segv
)
142 java::lang::NullPointerException
*nullp
143 = new java::lang::NullPointerException
;
144 unblock_signal (SIGSEGV
);
145 MAKE_THROW_FRAME (nullp
);
151 SIGNAL_HANDLER (catch_fpe
)
153 java::lang::ArithmeticException
*arithexception
154 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
155 unblock_signal (SIGFPE
);
156 #ifdef HANDLE_DIVIDE_OVERFLOW
157 HANDLE_DIVIDE_OVERFLOW
;
159 MAKE_THROW_FRAME (arithexception
);
161 throw arithexception
;
168 _Jv_equalUtf8Consts (const Utf8Const
* a
, const Utf8Const
*b
)
171 const _Jv_ushort
*aptr
, *bptr
;
174 if (a
->hash
!= b
->hash
)
177 if (b
->length
!= len
)
179 aptr
= (const _Jv_ushort
*)a
->data
;
180 bptr
= (const _Jv_ushort
*)b
->data
;
181 len
= (len
+ 1) >> 1;
183 if (*aptr
++ != *bptr
++)
188 /* True iff A is equal to STR.
189 HASH is STR->hashCode().
193 _Jv_equal (Utf8Const
* a
, jstring str
, jint hash
)
195 if (a
->hash
!= (_Jv_ushort
) hash
)
197 jint len
= str
->length();
199 jchar
*sptr
= _Jv_GetStringChars (str
);
200 unsigned char* ptr
= (unsigned char*) a
->data
;
201 unsigned char* limit
= ptr
+ a
->length
;
204 int ch
= UTF8_GET (ptr
, limit
);
213 /* Like _Jv_equal, but stop after N characters. */
215 _Jv_equaln (Utf8Const
*a
, jstring str
, jint n
)
217 jint len
= str
->length();
219 jchar
*sptr
= _Jv_GetStringChars (str
);
220 unsigned char* ptr
= (unsigned char*) a
->data
;
221 unsigned char* limit
= ptr
+ a
->length
;
222 for (; n
-- > 0; i
++, sptr
++)
224 int ch
= UTF8_GET (ptr
, limit
);
233 /* Count the number of Unicode chars encoded in a given Ut8 string. */
235 _Jv_strLengthUtf8(char* str
, int len
)
238 unsigned char* limit
;
241 ptr
= (unsigned char*) str
;
244 for (; ptr
< limit
; str_length
++)
246 if (UTF8_GET (ptr
, limit
) < 0)
252 /* Calculate a hash value for a string encoded in Utf8 format.
253 * This returns the same hash value as specified or java.lang.String.hashCode.
256 hashUtf8String (char* str
, int len
)
258 unsigned char* ptr
= (unsigned char*) str
;
259 unsigned char* limit
= ptr
+ len
;
264 int ch
= UTF8_GET (ptr
, limit
);
265 /* Updated specification from
266 http://www.javasoft.com/docs/books/jls/clarify.html. */
267 hash
= (31 * hash
) + ch
;
273 _Jv_makeUtf8Const (char* s
, int len
)
277 Utf8Const
* m
= (Utf8Const
*) _Jv_AllocBytes (sizeof(Utf8Const
) + len
+ 1);
278 memcpy (m
->data
, s
, len
);
281 m
->hash
= hashUtf8String (s
, len
) & 0xFFFF;
286 _Jv_makeUtf8Const (jstring string
)
288 jint hash
= string
->hashCode ();
289 jint len
= _Jv_GetStringUTFLength (string
);
291 Utf8Const
* m
= (Utf8Const
*)
292 _Jv_AllocBytes (sizeof(Utf8Const
) + len
+ 1);
297 _Jv_GetStringUTFRegion (string
, 0, string
->length (), m
->data
);
307 _Jv_Abort (const char *function
, const char *file
, int line
,
311 _Jv_Abort (const char *, const char *, int, const char *message
)
316 "libgcj failure: %s\n in function %s, file %s, line %d\n",
317 message
, function
, file
, line
);
319 fprintf (stderr
, "libgcj failure: %s\n", message
);
325 fail_on_finalization (jobject
)
327 JvFail ("object was finalized");
331 _Jv_GCWatch (jobject obj
)
333 _Jv_RegisterFinalizer (obj
, fail_on_finalization
);
337 _Jv_ThrowBadArrayIndex(jint bad_index
)
339 throw new java::lang::ArrayIndexOutOfBoundsException
340 (java::lang::String::valueOf (bad_index
));
344 _Jv_ThrowNullPointerException ()
346 throw new java::lang::NullPointerException
;
349 // Explicitly throw a no memory exception.
350 // The collector calls this when it encounters an out-of-memory condition.
351 void _Jv_ThrowNoMemory()
358 jvmpi_notify_alloc(jclass klass
, jint size
, jobject obj
)
360 // Service JVMPI allocation request.
361 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC
!= 0, false))
365 event
.event_type
= JVMPI_EVENT_OBJECT_ALLOC
;
367 event
.u
.obj_alloc
.arena_id
= 0;
368 event
.u
.obj_alloc
.class_id
= (jobjectID
) klass
;
369 event
.u
.obj_alloc
.is_array
= 0;
370 event
.u
.obj_alloc
.size
= size
;
371 event
.u
.obj_alloc
.obj_id
= (jobjectID
) obj
;
373 // FIXME: This doesn't look right for the Boehm GC. A GC may
374 // already be in progress. _Jv_DisableGC () doesn't wait for it.
375 // More importantly, I don't see the need for disabling GC, since we
376 // blatantly have a pointer to obj on our stack, ensuring that the
377 // object can't be collected. Even for a nonconservative collector,
378 // it appears to me that this must be true, since we are about to
379 // return obj. Isn't this whole approach way too intrusive for
380 // a useful profiling interface? - HB
382 (*_Jv_JVMPI_Notify_OBJECT_ALLOC
) (&event
);
386 #else /* !ENABLE_JVMPI */
387 # define jvmpi_notify_alloc(klass,size,obj) /* do nothing */
390 // Allocate a new object of class KLASS. SIZE is the size of the object
391 // to allocate. You might think this is redundant, but it isn't; some
392 // classes, such as String, aren't of fixed size.
393 // First a version that assumes that we have no finalizer, and that
394 // the class is already initialized.
395 // If we know that JVMPI is disabled, this can be replaced by a direct call
396 // to the allocator for the appropriate GC.
398 _Jv_AllocObjectNoInitNoFinalizer (jclass klass
, jint size
)
400 jobject obj
= (jobject
) _Jv_AllocObj (size
, klass
);
401 jvmpi_notify_alloc (klass
, size
, obj
);
405 // And now a version that initializes if necessary.
407 _Jv_AllocObjectNoFinalizer (jclass klass
, jint size
)
409 _Jv_InitClass (klass
);
410 jobject obj
= (jobject
) _Jv_AllocObj (size
, klass
);
411 jvmpi_notify_alloc (klass
, size
, obj
);
415 // And now the general version that registers a finalizer if necessary.
417 _Jv_AllocObject (jclass klass
, jint size
)
419 jobject obj
= _Jv_AllocObjectNoFinalizer (klass
, size
);
421 // We assume that the compiler only generates calls to this routine
422 // if there really is an interesting finalizer.
423 // Unfortunately, we still have to the dynamic test, since there may
424 // be cni calls to this routine.
425 // Note that on IA64 get_finalizer() returns the starting address of the
426 // function, not a function pointer. Thus this still works.
427 if (klass
->vtable
->get_finalizer ()
428 != java::lang::Object::class$
.vtable
->get_finalizer ())
429 _Jv_RegisterFinalizer (obj
, _Jv_FinalizeObject
);
433 // A version of the above that assumes the object contains no pointers,
434 // and requires no finalization. This can't happen if we need pointers
436 #ifdef JV_HASH_SYNCHRONIZATION
438 _Jv_AllocPtrFreeObject (jclass klass
, jint size
)
440 _Jv_InitClass (klass
);
442 jobject obj
= (jobject
) _Jv_AllocPtrFreeObj (size
, klass
);
445 // Service JVMPI request.
447 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC
!= 0, false))
451 event
.event_type
= JVMPI_EVENT_OBJECT_ALLOC
;
453 event
.u
.obj_alloc
.arena_id
= 0;
454 event
.u
.obj_alloc
.class_id
= (jobjectID
) klass
;
455 event
.u
.obj_alloc
.is_array
= 0;
456 event
.u
.obj_alloc
.size
= size
;
457 event
.u
.obj_alloc
.obj_id
= (jobjectID
) obj
;
460 (*_Jv_JVMPI_Notify_OBJECT_ALLOC
) (&event
);
467 #endif /* JV_HASH_SYNCHRONIZATION */
470 // Allocate a new array of Java objects. Each object is of type
471 // `elementClass'. `init' is used to initialize each slot in the
474 _Jv_NewObjectArray (jsize count
, jclass elementClass
, jobject init
)
476 if (__builtin_expect (count
< 0, false))
477 throw new java::lang::NegativeArraySizeException
;
479 JvAssert (! elementClass
->isPrimitive ());
481 // Ensure that elements pointer is properly aligned.
482 jobjectArray obj
= NULL
;
483 size_t size
= (size_t) elements (obj
);
484 size
+= count
* sizeof (jobject
);
486 jclass klass
= _Jv_GetArrayClass (elementClass
,
487 elementClass
->getClassLoaderInternal());
489 obj
= (jobjectArray
) _Jv_AllocArray (size
, klass
);
491 jsize
*lp
= const_cast<jsize
*> (&obj
->length
);
493 // We know the allocator returns zeroed memory. So don't bother
497 jobject
*ptr
= elements(obj
);
504 // Allocate a new array of primitives. ELTYPE is the type of the
505 // element, COUNT is the size of the array.
507 _Jv_NewPrimArray (jclass eltype
, jint count
)
509 int elsize
= eltype
->size();
510 if (__builtin_expect (count
< 0, false))
511 throw new java::lang::NegativeArraySizeException
;
513 JvAssert (eltype
->isPrimitive ());
514 jobject dummy
= NULL
;
515 size_t size
= (size_t) _Jv_GetArrayElementFromElementType (dummy
, eltype
);
517 // Check for overflow.
518 if (__builtin_expect ((size_t) count
>
519 (SIZE_T_MAX
- size
) / elsize
, false))
522 jclass klass
= _Jv_GetArrayClass (eltype
, 0);
524 # ifdef JV_HASH_SYNCHRONIZATION
525 // Since the vtable is always statically allocated,
526 // these are completely pointerfree! Make sure the GC doesn't touch them.
528 (__JArray
*) _Jv_AllocPtrFreeObj (size
+ elsize
* count
, klass
);
529 memset((char *)arr
+ size
, 0, elsize
* count
);
531 __JArray
*arr
= (__JArray
*) _Jv_AllocObj (size
+ elsize
* count
, klass
);
532 // Note that we assume we are given zeroed memory by the allocator.
535 jsize
*lp
= const_cast<jsize
*> (&arr
->length
);
542 _Jv_NewArray (jint type
, jint size
)
546 case 4: return JvNewBooleanArray (size
);
547 case 5: return JvNewCharArray (size
);
548 case 6: return JvNewFloatArray (size
);
549 case 7: return JvNewDoubleArray (size
);
550 case 8: return JvNewByteArray (size
);
551 case 9: return JvNewShortArray (size
);
552 case 10: return JvNewIntArray (size
);
553 case 11: return JvNewLongArray (size
);
555 throw new java::lang::InternalError
556 (JvNewStringLatin1 ("invalid type code in _Jv_NewArray"));
559 // Allocate a possibly multi-dimensional array but don't check that
560 // any array length is <0.
562 _Jv_NewMultiArrayUnchecked (jclass type
, jint dimensions
, jint
*sizes
)
564 JvAssert (type
->isArray());
565 jclass element_type
= type
->getComponentType();
567 if (element_type
->isPrimitive())
568 result
= _Jv_NewPrimArray (element_type
, sizes
[0]);
570 result
= _Jv_NewObjectArray (sizes
[0], element_type
, NULL
);
574 JvAssert (! element_type
->isPrimitive());
575 JvAssert (element_type
->isArray());
576 jobject
*contents
= elements ((jobjectArray
) result
);
577 for (int i
= 0; i
< sizes
[0]; ++i
)
578 contents
[i
] = _Jv_NewMultiArrayUnchecked (element_type
, dimensions
- 1,
586 _Jv_NewMultiArray (jclass type
, jint dimensions
, jint
*sizes
)
588 for (int i
= 0; i
< dimensions
; ++i
)
590 throw new java::lang::NegativeArraySizeException
;
592 return _Jv_NewMultiArrayUnchecked (type
, dimensions
, sizes
);
596 _Jv_NewMultiArray (jclass array_type
, jint dimensions
, ...)
599 jint sizes
[dimensions
];
600 va_start (args
, dimensions
);
601 for (int i
= 0; i
< dimensions
; ++i
)
603 jint size
= va_arg (args
, jint
);
605 throw new java::lang::NegativeArraySizeException
;
610 return _Jv_NewMultiArrayUnchecked (array_type
, dimensions
, sizes
);
615 // Ensure 8-byte alignment, for hash synchronization.
616 #define DECLARE_PRIM_TYPE(NAME) \
617 _Jv_ArrayVTable _Jv_##NAME##VTable; \
618 java::lang::Class _Jv_##NAME##Class __attribute__ ((aligned (8)));
620 DECLARE_PRIM_TYPE(byte
)
621 DECLARE_PRIM_TYPE(short)
622 DECLARE_PRIM_TYPE(int)
623 DECLARE_PRIM_TYPE(long)
624 DECLARE_PRIM_TYPE(boolean
)
625 DECLARE_PRIM_TYPE(char)
626 DECLARE_PRIM_TYPE(float)
627 DECLARE_PRIM_TYPE(double)
628 DECLARE_PRIM_TYPE(void)
631 _Jv_InitPrimClass (jclass cl
, char *cname
, char sig
, int len
,
632 _Jv_ArrayVTable
*array_vtable
)
634 using namespace java::lang::reflect
;
636 _Jv_InitNewClassFields (cl
);
638 // We must set the vtable for the class; the Java constructor
640 (*(_Jv_VTable
**) cl
) = java::lang::Class::class$
.vtable
;
642 // Initialize the fields we care about. We do this in the same
643 // order they are declared in Class.h.
644 cl
->name
= _Jv_makeUtf8Const ((char *) cname
, -1);
645 cl
->accflags
= Modifier::PUBLIC
| Modifier::FINAL
| Modifier::ABSTRACT
;
646 cl
->method_count
= sig
;
647 cl
->size_in_bytes
= len
;
648 cl
->vtable
= JV_PRIMITIVE_VTABLE
;
649 cl
->state
= JV_STATE_DONE
;
652 _Jv_NewArrayClass (cl
, NULL
, (_Jv_VTable
*) array_vtable
);
656 _Jv_FindClassFromSignature (char *sig
, java::lang::ClassLoader
*loader
)
661 return JvPrimClass (byte
);
663 return JvPrimClass (short);
665 return JvPrimClass (int);
667 return JvPrimClass (long);
669 return JvPrimClass (boolean
);
671 return JvPrimClass (char);
673 return JvPrimClass (float);
675 return JvPrimClass (double);
677 return JvPrimClass (void);
681 for (i
= 1; sig
[i
] && sig
[i
] != ';'; ++i
)
683 _Jv_Utf8Const
*name
= _Jv_makeUtf8Const (&sig
[1], i
- 1);
684 return _Jv_FindClass (name
, loader
);
688 jclass klass
= _Jv_FindClassFromSignature (&sig
[1], loader
);
691 return _Jv_GetArrayClass (klass
, loader
);
695 return NULL
; // Placate compiler.
701 JvConvertArgv (int argc
, const char **argv
)
705 jobjectArray ar
= JvNewObjectArray(argc
, &StringClass
, NULL
);
706 jobject
*ptr
= elements(ar
);
707 jbyteArray bytes
= NULL
;
708 for (int i
= 0; i
< argc
; i
++)
710 const char *arg
= argv
[i
];
711 int len
= strlen (arg
);
712 if (bytes
== NULL
|| bytes
->length
< len
)
713 bytes
= JvNewByteArray (len
);
714 jbyte
*bytePtr
= elements (bytes
);
715 // We assume jbyte == char.
716 memcpy (bytePtr
, arg
, len
);
718 // Now convert using the default encoding.
719 *ptr
++ = new java::lang::String (bytes
, 0, len
);
721 return (JArray
<jstring
>*) ar
;
724 // FIXME: These variables are static so that they will be
725 // automatically scanned by the Boehm collector. This is needed
726 // because with qthreads the collector won't scan the initial stack --
727 // it will only scan the qthreads stacks.
729 // Command line arguments.
730 static JArray
<jstring
> *arg_vec
;
732 // The primary thread.
733 static java::lang::Thread
*main_thread
;
735 #ifndef DISABLE_GETENV_PROPERTIES
738 next_property_key (char *s
, size_t *length
)
744 // Skip over whitespace
748 // If we've reached the end, return NULL. Also return NULL if for
749 // some reason we've come across a malformed property string.
755 // Determine the length of the property key.
773 next_property_value (char *s
, size_t *length
)
789 // If we've reached the end, return NULL.
793 // Determine the length of the property value.
812 process_gcj_properties ()
814 char *props
= getenv("GCJ_PROPERTIES");
817 size_t property_count
= 0;
822 // Whip through props quickly in order to count the number of
824 while (p
&& (p
= next_property_key (p
, &length
)))
826 // Skip to the end of the key
829 p
= next_property_value (p
, &length
);
836 // Allocate an array of property value/key pairs.
837 _Jv_Environment_Properties
=
838 (property_pair
*) malloc (sizeof(property_pair
)
839 * (property_count
+ 1));
841 // Go through the properties again, initializing _Jv_Properties
845 while (p
&& (p
= next_property_key (p
, &length
)))
847 _Jv_Environment_Properties
[property_count
].key
= p
;
848 _Jv_Environment_Properties
[property_count
].key_length
= length
;
850 // Skip to the end of the key
853 p
= next_property_value (p
, &length
);
855 _Jv_Environment_Properties
[property_count
].value
= p
;
856 _Jv_Environment_Properties
[property_count
].value_length
= length
;
863 memset ((void *) &_Jv_Environment_Properties
[property_count
],
864 0, sizeof (property_pair
));
868 // Null terminate the strings.
869 while (_Jv_Environment_Properties
[i
].key
)
871 _Jv_Environment_Properties
[i
].key
[_Jv_Environment_Properties
[i
].key_length
] = 0;
872 _Jv_Environment_Properties
[i
++].value
[_Jv_Environment_Properties
[i
].value_length
] = 0;
876 #endif // DISABLE_GETENV_PROPERTIES
880 _Jv_Utf8Const
*void_signature
;
881 _Jv_Utf8Const
*clinit_name
;
882 _Jv_Utf8Const
*init_name
;
883 _Jv_Utf8Const
*finit_name
;
885 bool runtimeInitialized
= false;
889 _Jv_CreateJavaVM (void* /*vm_args*/)
893 if (runtimeInitialized
)
896 runtimeInitialized
= true;
898 PROCESS_GCJ_PROPERTIES
;
902 _Jv_InitializeSyncMutex ();
904 /* Initialize Utf8 constants declared in jvm.h. */
905 void_signature
= _Jv_makeUtf8Const ("()V", 3);
906 clinit_name
= _Jv_makeUtf8Const ("<clinit>", 8);
907 init_name
= _Jv_makeUtf8Const ("<init>", 6);
908 finit_name
= _Jv_makeUtf8Const ("finit$", 6);
910 /* Initialize built-in classes to represent primitive TYPEs. */
911 _Jv_InitPrimClass (&_Jv_byteClass
, "byte", 'B', 1, &_Jv_byteVTable
);
912 _Jv_InitPrimClass (&_Jv_shortClass
, "short", 'S', 2, &_Jv_shortVTable
);
913 _Jv_InitPrimClass (&_Jv_intClass
, "int", 'I', 4, &_Jv_intVTable
);
914 _Jv_InitPrimClass (&_Jv_longClass
, "long", 'J', 8, &_Jv_longVTable
);
915 _Jv_InitPrimClass (&_Jv_booleanClass
, "boolean", 'Z', 1, &_Jv_booleanVTable
);
916 _Jv_InitPrimClass (&_Jv_charClass
, "char", 'C', 2, &_Jv_charVTable
);
917 _Jv_InitPrimClass (&_Jv_floatClass
, "float", 'F', 4, &_Jv_floatVTable
);
918 _Jv_InitPrimClass (&_Jv_doubleClass
, "double", 'D', 8, &_Jv_doubleVTable
);
919 _Jv_InitPrimClass (&_Jv_voidClass
, "void", 'V', 0, &_Jv_voidVTable
);
921 // Turn stack trace generation off while creating exception objects.
922 _Jv_InitClass (&java::lang::VMThrowable::class$
);
923 java::lang::VMThrowable::trace_enabled
= 0;
930 no_memory
= new java::lang::OutOfMemoryError
;
932 java::lang::VMThrowable::trace_enabled
= 1;
935 LTDL_SET_PRELOADED_SYMBOLS ();
938 _Jv_platform_initialize ();
942 _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady
);
944 // Start the GC finalizer thread. A VirtualMachineError can be
945 // thrown by the runtime if, say, threads aren't available. In this
946 // case finalizers simply won't run.
949 using namespace gnu::gcj::runtime
;
950 FinalizerThread
*ft
= new FinalizerThread ();
953 catch (java::lang::VirtualMachineError
*ignore
)
961 _Jv_RunMain (jclass klass
, const char *name
, int argc
, const char **argv
,
964 _Jv_SetArgs (argc
, argv
);
966 java::lang::Runtime
*runtime
= NULL
;
970 // Set this very early so that it is seen when java.lang.System
973 _Jv_Jar_Class_Path
= strdup (name
);
974 _Jv_CreateJavaVM (NULL
);
976 // Get the Runtime here. We want to initialize it before searching
977 // for `main'; that way it will be set up if `main' is a JNI method.
978 runtime
= java::lang::Runtime::getRuntime ();
980 #ifdef DISABLE_MAIN_ARGS
981 arg_vec
= JvConvertArgv (0, 0);
983 arg_vec
= JvConvertArgv (argc
- 1, argv
+ 1);
986 using namespace gnu::gcj::runtime
;
988 main_thread
= new FirstThread (klass
, arg_vec
);
990 main_thread
= new FirstThread (JvNewStringLatin1 (name
),
993 catch (java::lang::Throwable
*t
)
995 java::lang::System::err
->println (JvNewStringLatin1
996 ("Exception during runtime initialization"));
997 t
->printStackTrace();
1001 _Jv_AttachCurrentThread (main_thread
);
1002 _Jv_ThreadRun (main_thread
);
1005 int status
= (int) java::lang::ThreadGroup::had_uncaught_exception
;
1006 runtime
->exit (status
);
1010 JvRunMain (jclass klass
, int argc
, const char **argv
)
1012 _Jv_RunMain (klass
, NULL
, argc
, argv
, false);
1017 // Parse a string and return a heap size.
1019 parse_heap_size (const char *spec
)
1022 unsigned long val
= strtoul (spec
, &end
, 10);
1023 if (*end
== 'k' || *end
== 'K')
1025 else if (*end
== 'm' || *end
== 'M')
1027 return (size_t) val
;
1030 // Set the initial heap size. This might be ignored by the GC layer.
1031 // This must be called before _Jv_RunMain.
1033 _Jv_SetInitialHeapSize (const char *arg
)
1035 size_t size
= parse_heap_size (arg
);
1036 _Jv_GCSetInitialHeapSize (size
);
1039 // Set the maximum heap size. This might be ignored by the GC layer.
1040 // This must be called before _Jv_RunMain.
1042 _Jv_SetMaximumHeapSize (const char *arg
)
1044 size_t size
= parse_heap_size (arg
);
1045 _Jv_GCSetMaximumHeapSize (size
);
1051 _Jv_Malloc (jsize size
)
1053 if (__builtin_expect (size
== 0, false))
1055 void *ptr
= malloc ((size_t) size
);
1056 if (__builtin_expect (ptr
== NULL
, false))
1062 _Jv_Realloc (void *ptr
, jsize size
)
1064 if (__builtin_expect (size
== 0, false))
1066 ptr
= realloc (ptr
, (size_t) size
);
1067 if (__builtin_expect (ptr
== NULL
, false))
1073 _Jv_MallocUnchecked (jsize size
)
1075 if (__builtin_expect (size
== 0, false))
1077 return malloc ((size_t) size
);
1081 _Jv_Free (void* ptr
)
1088 // In theory, these routines can be #ifdef'd away on machines which
1089 // support divide overflow signals. However, we never know if some
1090 // code might have been compiled with "-fuse-divide-subroutine", so we
1091 // always include them in libgcj.
1094 _Jv_divI (jint dividend
, jint divisor
)
1096 if (__builtin_expect (divisor
== 0, false))
1098 java::lang::ArithmeticException
*arithexception
1099 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1100 throw arithexception
;
1103 if (dividend
== (jint
) 0x80000000L
&& divisor
== -1)
1106 return dividend
/ divisor
;
1110 _Jv_remI (jint dividend
, jint divisor
)
1112 if (__builtin_expect (divisor
== 0, false))
1114 java::lang::ArithmeticException
*arithexception
1115 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1116 throw 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))
1130 java::lang::ArithmeticException
*arithexception
1131 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1132 throw arithexception
;
1135 if (dividend
== (jlong
) 0x8000000000000000LL
&& divisor
== -1)
1138 return dividend
/ divisor
;
1142 _Jv_remJ (jlong dividend
, jlong divisor
)
1144 if (__builtin_expect (divisor
== 0, false))
1146 java::lang::ArithmeticException
*arithexception
1147 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1148 throw arithexception
;
1151 if (dividend
== (jlong
) 0x8000000000000000LL
&& divisor
== -1)
1154 return dividend
% divisor
;
1159 // Return true if SELF_KLASS can access a field or method in
1160 // OTHER_KLASS. The field or method's access flags are specified in
1163 _Jv_CheckAccess (jclass self_klass
, jclass other_klass
, jint flags
)
1165 using namespace java::lang::reflect
;
1166 return ((self_klass
== other_klass
)
1167 || ((flags
& Modifier::PUBLIC
) != 0)
1168 || (((flags
& Modifier::PROTECTED
) != 0)
1169 && other_klass
->isAssignableFrom (self_klass
))
1170 || (((flags
& Modifier::PRIVATE
) == 0)
1171 && _Jv_ClassNameSamePackage (self_klass
->name
,
1172 other_klass
->name
)));