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>
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 // Number of bytes in largest array object we create. This could be
74 // increased to the largest size_t value, so long as the appropriate
75 // functions are changed to take a size_t argument instead of jint.
76 #define MAX_OBJECT_SIZE ((1<<31) - 1)
78 static const char *no_properties
[] = { NULL
};
80 // Properties set at compile time.
81 const char **_Jv_Compiler_Properties
= no_properties
;
83 // The JAR file to add to the beginning of java.class.path.
84 const char *_Jv_Jar_Class_Path
;
86 #ifndef DISABLE_GETENV_PROPERTIES
87 // Property key/value pairs.
88 property_pair
*_Jv_Environment_Properties
;
91 // Stash the argv pointer to benefit native libraries that need it.
92 const char **_Jv_argv
;
99 // _Jv_argc is 0 if not explicitly initialized.
104 _Jv_GetSafeArg (int index
)
106 if (index
>=0 && index
< _Jv_GetNbArgs ())
107 return _Jv_argv
[index
];
113 _Jv_SetArgs (int argc
, const char **argv
)
120 // Pointer to JVMPI notification functions.
121 void (*_Jv_JVMPI_Notify_OBJECT_ALLOC
) (JVMPI_Event
*event
);
122 void (*_Jv_JVMPI_Notify_THREAD_START
) (JVMPI_Event
*event
);
123 void (*_Jv_JVMPI_Notify_THREAD_END
) (JVMPI_Event
*event
);
127 /* Unblock a signal. Unless we do this, the signal may only be sent
130 unblock_signal (int signum
)
132 #ifdef _POSIX_VERSION
136 sigaddset (&sigs
, signum
);
137 sigprocmask (SIG_UNBLOCK
, &sigs
, NULL
);
142 SIGNAL_HANDLER (catch_segv
)
144 java::lang::NullPointerException
*nullp
145 = new java::lang::NullPointerException
;
146 unblock_signal (SIGSEGV
);
147 MAKE_THROW_FRAME (nullp
);
153 SIGNAL_HANDLER (catch_fpe
)
155 java::lang::ArithmeticException
*arithexception
156 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
157 unblock_signal (SIGFPE
);
158 #ifdef HANDLE_DIVIDE_OVERFLOW
159 HANDLE_DIVIDE_OVERFLOW
;
161 MAKE_THROW_FRAME (arithexception
);
163 throw arithexception
;
170 _Jv_equalUtf8Consts (const Utf8Const
* a
, const Utf8Const
*b
)
173 const _Jv_ushort
*aptr
, *bptr
;
176 if (a
->hash
!= b
->hash
)
179 if (b
->length
!= len
)
181 aptr
= (const _Jv_ushort
*)a
->data
;
182 bptr
= (const _Jv_ushort
*)b
->data
;
183 len
= (len
+ 1) >> 1;
185 if (*aptr
++ != *bptr
++)
190 /* True iff A is equal to STR.
191 HASH is STR->hashCode().
195 _Jv_equal (Utf8Const
* a
, jstring str
, jint hash
)
197 if (a
->hash
!= (_Jv_ushort
) hash
)
199 jint len
= str
->length();
201 jchar
*sptr
= _Jv_GetStringChars (str
);
202 unsigned char* ptr
= (unsigned char*) a
->data
;
203 unsigned char* limit
= ptr
+ a
->length
;
206 int ch
= UTF8_GET (ptr
, limit
);
215 /* Like _Jv_equal, but stop after N characters. */
217 _Jv_equaln (Utf8Const
*a
, jstring str
, jint n
)
219 jint len
= str
->length();
221 jchar
*sptr
= _Jv_GetStringChars (str
);
222 unsigned char* ptr
= (unsigned char*) a
->data
;
223 unsigned char* limit
= ptr
+ a
->length
;
224 for (; n
-- > 0; i
++, sptr
++)
226 int ch
= UTF8_GET (ptr
, limit
);
235 /* Count the number of Unicode chars encoded in a given Ut8 string. */
237 _Jv_strLengthUtf8(char* str
, int len
)
240 unsigned char* limit
;
243 ptr
= (unsigned char*) str
;
246 for (; ptr
< limit
; str_length
++)
248 if (UTF8_GET (ptr
, limit
) < 0)
254 /* Calculate a hash value for a string encoded in Utf8 format.
255 * This returns the same hash value as specified or java.lang.String.hashCode.
258 hashUtf8String (char* str
, int len
)
260 unsigned char* ptr
= (unsigned char*) str
;
261 unsigned char* limit
= ptr
+ len
;
266 int ch
= UTF8_GET (ptr
, limit
);
267 /* Updated specification from
268 http://www.javasoft.com/docs/books/jls/clarify.html. */
269 hash
= (31 * hash
) + ch
;
275 _Jv_makeUtf8Const (char* s
, int len
)
279 Utf8Const
* m
= (Utf8Const
*) _Jv_AllocBytes (sizeof(Utf8Const
) + len
+ 1);
280 memcpy (m
->data
, s
, len
);
283 m
->hash
= hashUtf8String (s
, len
) & 0xFFFF;
288 _Jv_makeUtf8Const (jstring string
)
290 jint hash
= string
->hashCode ();
291 jint len
= _Jv_GetStringUTFLength (string
);
293 Utf8Const
* m
= (Utf8Const
*)
294 _Jv_AllocBytes (sizeof(Utf8Const
) + len
+ 1);
299 _Jv_GetStringUTFRegion (string
, 0, string
->length (), m
->data
);
309 _Jv_Abort (const char *function
, const char *file
, int line
,
313 _Jv_Abort (const char *, const char *, int, const char *message
)
318 "libgcj failure: %s\n in function %s, file %s, line %d\n",
319 message
, function
, file
, line
);
321 fprintf (stderr
, "libgcj failure: %s\n", message
);
327 fail_on_finalization (jobject
)
329 JvFail ("object was finalized");
333 _Jv_GCWatch (jobject obj
)
335 _Jv_RegisterFinalizer (obj
, fail_on_finalization
);
339 _Jv_ThrowBadArrayIndex(jint bad_index
)
341 throw new java::lang::ArrayIndexOutOfBoundsException
342 (java::lang::String::valueOf (bad_index
));
346 _Jv_ThrowNullPointerException ()
348 throw new java::lang::NullPointerException
;
351 // Explicitly throw a no memory exception.
352 // The collector calls this when it encounters an out-of-memory condition.
353 void _Jv_ThrowNoMemory()
360 jvmpi_notify_alloc(jclass klass
, jint size
, jobject obj
)
362 // Service JVMPI allocation request.
363 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC
!= 0, false))
367 event
.event_type
= JVMPI_EVENT_OBJECT_ALLOC
;
369 event
.u
.obj_alloc
.arena_id
= 0;
370 event
.u
.obj_alloc
.class_id
= (jobjectID
) klass
;
371 event
.u
.obj_alloc
.is_array
= 0;
372 event
.u
.obj_alloc
.size
= size
;
373 event
.u
.obj_alloc
.obj_id
= (jobjectID
) obj
;
375 // FIXME: This doesn't look right for the Boehm GC. A GC may
376 // already be in progress. _Jv_DisableGC () doesn't wait for it.
377 // More importantly, I don't see the need for disabling GC, since we
378 // blatantly have a pointer to obj on our stack, ensuring that the
379 // object can't be collected. Even for a nonconservative collector,
380 // it appears to me that this must be true, since we are about to
381 // return obj. Isn't this whole approach way too intrusive for
382 // a useful profiling interface? - HB
384 (*_Jv_JVMPI_Notify_OBJECT_ALLOC
) (&event
);
388 #else /* !ENABLE_JVMPI */
389 # define jvmpi_notify_alloc(klass,size,obj) /* do nothing */
392 // Allocate a new object of class KLASS.
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
)
400 jint size
= klass
->size ();
401 jobject obj
= (jobject
) _Jv_AllocObj (size
, klass
);
402 jvmpi_notify_alloc (klass
, size
, obj
);
406 // And now a version that initializes if necessary.
408 _Jv_AllocObjectNoFinalizer (jclass klass
)
410 _Jv_InitClass (klass
);
411 jint size
= klass
->size ();
412 jobject obj
= (jobject
) _Jv_AllocObj (size
, klass
);
413 jvmpi_notify_alloc (klass
, size
, obj
);
417 // And now the general version that registers a finalizer if necessary.
419 _Jv_AllocObject (jclass klass
)
421 jobject obj
= _Jv_AllocObjectNoFinalizer (klass
);
423 // We assume that the compiler only generates calls to this routine
424 // if there really is an interesting finalizer.
425 // Unfortunately, we still have to the dynamic test, since there may
426 // be cni calls to this routine.
427 // Note that on IA64 get_finalizer() returns the starting address of the
428 // function, not a function pointer. Thus this still works.
429 if (klass
->vtable
->get_finalizer ()
430 != java::lang::Object::class$
.vtable
->get_finalizer ())
431 _Jv_RegisterFinalizer (obj
, _Jv_FinalizeObject
);
435 // Allocate a String, including variable length storage.
437 _Jv_AllocString(jsize len
)
439 using namespace java::lang
;
441 jsize sz
= sizeof(java::lang::String
) + len
* sizeof(jchar
);
443 // We assert that for strings allocated this way, the data field
444 // will always point to the object itself. Thus there is no reason
445 // for the garbage collector to scan any of it.
446 // Furthermore, we're about to overwrite the string data, so
447 // initialization of the object is not an issue.
449 // String needs no initialization, and there is no finalizer, so
450 // we can go directly to the collector's allocator interface.
451 jstring obj
= (jstring
) _Jv_AllocPtrFreeObj(sz
, &String::class$
);
454 obj
->boffset
= sizeof(java::lang::String
);
456 obj
->cachedHashCode
= 0;
459 // Service JVMPI request.
461 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC
!= 0, false))
465 event
.event_type
= JVMPI_EVENT_OBJECT_ALLOC
;
467 event
.u
.obj_alloc
.arena_id
= 0;
468 event
.u
.obj_alloc
.class_id
= (jobjectID
) &String::class$
;
469 event
.u
.obj_alloc
.is_array
= 0;
470 event
.u
.obj_alloc
.size
= sz
;
471 event
.u
.obj_alloc
.obj_id
= (jobjectID
) obj
;
474 (*_Jv_JVMPI_Notify_OBJECT_ALLOC
) (&event
);
482 // A version of the above that assumes the object contains no pointers,
483 // and requires no finalization. This can't happen if we need pointers
485 #ifdef JV_HASH_SYNCHRONIZATION
487 _Jv_AllocPtrFreeObject (jclass klass
)
489 _Jv_InitClass (klass
);
490 jint size
= klass
->size ();
492 jobject obj
= (jobject
) _Jv_AllocPtrFreeObj (size
, klass
);
495 // Service JVMPI request.
497 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC
!= 0, false))
501 event
.event_type
= JVMPI_EVENT_OBJECT_ALLOC
;
503 event
.u
.obj_alloc
.arena_id
= 0;
504 event
.u
.obj_alloc
.class_id
= (jobjectID
) klass
;
505 event
.u
.obj_alloc
.is_array
= 0;
506 event
.u
.obj_alloc
.size
= size
;
507 event
.u
.obj_alloc
.obj_id
= (jobjectID
) obj
;
510 (*_Jv_JVMPI_Notify_OBJECT_ALLOC
) (&event
);
517 #endif /* JV_HASH_SYNCHRONIZATION */
520 // Allocate a new array of Java objects. Each object is of type
521 // `elementClass'. `init' is used to initialize each slot in the
524 _Jv_NewObjectArray (jsize count
, jclass elementClass
, jobject init
)
526 if (__builtin_expect (count
< 0, false))
527 throw new java::lang::NegativeArraySizeException
;
529 JvAssert (! elementClass
->isPrimitive ());
531 // Ensure that elements pointer is properly aligned.
532 jobjectArray obj
= NULL
;
533 size_t size
= (size_t) elements (obj
);
534 // Check for overflow.
535 if (__builtin_expect ((size_t) count
>
536 (MAX_OBJECT_SIZE
- 1 - size
) / sizeof (jobject
), false))
539 size
+= count
* sizeof (jobject
);
541 jclass klass
= _Jv_GetArrayClass (elementClass
,
542 elementClass
->getClassLoaderInternal());
544 obj
= (jobjectArray
) _Jv_AllocArray (size
, klass
);
546 jsize
*lp
= const_cast<jsize
*> (&obj
->length
);
548 // We know the allocator returns zeroed memory. So don't bother
552 jobject
*ptr
= elements(obj
);
559 // Allocate a new array of primitives. ELTYPE is the type of the
560 // element, COUNT is the size of the array.
562 _Jv_NewPrimArray (jclass eltype
, jint count
)
564 int elsize
= eltype
->size();
565 if (__builtin_expect (count
< 0, false))
566 throw new java::lang::NegativeArraySizeException
;
568 JvAssert (eltype
->isPrimitive ());
569 jobject dummy
= NULL
;
570 size_t size
= (size_t) _Jv_GetArrayElementFromElementType (dummy
, eltype
);
572 // Check for overflow.
573 if (__builtin_expect ((size_t) count
>
574 (MAX_OBJECT_SIZE
- size
) / elsize
, false))
577 jclass klass
= _Jv_GetArrayClass (eltype
, 0);
579 # ifdef JV_HASH_SYNCHRONIZATION
580 // Since the vtable is always statically allocated,
581 // these are completely pointerfree! Make sure the GC doesn't touch them.
583 (__JArray
*) _Jv_AllocPtrFreeObj (size
+ elsize
* count
, klass
);
584 memset((char *)arr
+ size
, 0, elsize
* count
);
586 __JArray
*arr
= (__JArray
*) _Jv_AllocObj (size
+ elsize
* count
, klass
);
587 // Note that we assume we are given zeroed memory by the allocator.
590 jsize
*lp
= const_cast<jsize
*> (&arr
->length
);
597 _Jv_NewArray (jint type
, jint size
)
601 case 4: return JvNewBooleanArray (size
);
602 case 5: return JvNewCharArray (size
);
603 case 6: return JvNewFloatArray (size
);
604 case 7: return JvNewDoubleArray (size
);
605 case 8: return JvNewByteArray (size
);
606 case 9: return JvNewShortArray (size
);
607 case 10: return JvNewIntArray (size
);
608 case 11: return JvNewLongArray (size
);
610 throw new java::lang::InternalError
611 (JvNewStringLatin1 ("invalid type code in _Jv_NewArray"));
614 // Allocate a possibly multi-dimensional array but don't check that
615 // any array length is <0.
617 _Jv_NewMultiArrayUnchecked (jclass type
, jint dimensions
, jint
*sizes
)
619 JvAssert (type
->isArray());
620 jclass element_type
= type
->getComponentType();
622 if (element_type
->isPrimitive())
623 result
= _Jv_NewPrimArray (element_type
, sizes
[0]);
625 result
= _Jv_NewObjectArray (sizes
[0], element_type
, NULL
);
629 JvAssert (! element_type
->isPrimitive());
630 JvAssert (element_type
->isArray());
631 jobject
*contents
= elements ((jobjectArray
) result
);
632 for (int i
= 0; i
< sizes
[0]; ++i
)
633 contents
[i
] = _Jv_NewMultiArrayUnchecked (element_type
, dimensions
- 1,
641 _Jv_NewMultiArray (jclass type
, jint dimensions
, jint
*sizes
)
643 for (int i
= 0; i
< dimensions
; ++i
)
645 throw new java::lang::NegativeArraySizeException
;
647 return _Jv_NewMultiArrayUnchecked (type
, dimensions
, sizes
);
651 _Jv_NewMultiArray (jclass array_type
, jint dimensions
, ...)
654 jint sizes
[dimensions
];
655 va_start (args
, dimensions
);
656 for (int i
= 0; i
< dimensions
; ++i
)
658 jint size
= va_arg (args
, jint
);
660 throw new java::lang::NegativeArraySizeException
;
665 return _Jv_NewMultiArrayUnchecked (array_type
, dimensions
, sizes
);
670 // Ensure 8-byte alignment, for hash synchronization.
671 #define DECLARE_PRIM_TYPE(NAME) \
672 _Jv_ArrayVTable _Jv_##NAME##VTable; \
673 java::lang::Class _Jv_##NAME##Class __attribute__ ((aligned (8)));
675 DECLARE_PRIM_TYPE(byte
)
676 DECLARE_PRIM_TYPE(short)
677 DECLARE_PRIM_TYPE(int)
678 DECLARE_PRIM_TYPE(long)
679 DECLARE_PRIM_TYPE(boolean
)
680 DECLARE_PRIM_TYPE(char)
681 DECLARE_PRIM_TYPE(float)
682 DECLARE_PRIM_TYPE(double)
683 DECLARE_PRIM_TYPE(void)
686 _Jv_InitPrimClass (jclass cl
, char *cname
, char sig
, int len
,
687 _Jv_ArrayVTable
*array_vtable
)
689 using namespace java::lang::reflect
;
691 // We must set the vtable for the class; the Java constructor
693 (*(_Jv_VTable
**) cl
) = java::lang::Class::class$
.vtable
;
695 // Initialize the fields we care about. We do this in the same
696 // order they are declared in Class.h.
697 cl
->name
= _Jv_makeUtf8Const ((char *) cname
, -1);
698 cl
->accflags
= Modifier::PUBLIC
| Modifier::FINAL
| Modifier::ABSTRACT
;
699 cl
->method_count
= sig
;
700 cl
->size_in_bytes
= len
;
701 cl
->vtable
= JV_PRIMITIVE_VTABLE
;
702 cl
->state
= JV_STATE_DONE
;
705 _Jv_NewArrayClass (cl
, NULL
, (_Jv_VTable
*) array_vtable
);
709 _Jv_FindClassFromSignature (char *sig
, java::lang::ClassLoader
*loader
)
714 return JvPrimClass (byte
);
716 return JvPrimClass (short);
718 return JvPrimClass (int);
720 return JvPrimClass (long);
722 return JvPrimClass (boolean
);
724 return JvPrimClass (char);
726 return JvPrimClass (float);
728 return JvPrimClass (double);
730 return JvPrimClass (void);
734 for (i
= 1; sig
[i
] && sig
[i
] != ';'; ++i
)
736 _Jv_Utf8Const
*name
= _Jv_makeUtf8Const (&sig
[1], i
- 1);
737 return _Jv_FindClass (name
, loader
);
741 jclass klass
= _Jv_FindClassFromSignature (&sig
[1], loader
);
744 return _Jv_GetArrayClass (klass
, loader
);
748 return NULL
; // Placate compiler.
754 JvConvertArgv (int argc
, const char **argv
)
758 jobjectArray ar
= JvNewObjectArray(argc
, &StringClass
, NULL
);
759 jobject
*ptr
= elements(ar
);
760 jbyteArray bytes
= NULL
;
761 for (int i
= 0; i
< argc
; i
++)
763 const char *arg
= argv
[i
];
764 int len
= strlen (arg
);
765 if (bytes
== NULL
|| bytes
->length
< len
)
766 bytes
= JvNewByteArray (len
);
767 jbyte
*bytePtr
= elements (bytes
);
768 // We assume jbyte == char.
769 memcpy (bytePtr
, arg
, len
);
771 // Now convert using the default encoding.
772 *ptr
++ = new java::lang::String (bytes
, 0, len
);
774 return (JArray
<jstring
>*) ar
;
777 // FIXME: These variables are static so that they will be
778 // automatically scanned by the Boehm collector. This is needed
779 // because with qthreads the collector won't scan the initial stack --
780 // it will only scan the qthreads stacks.
782 // Command line arguments.
783 static JArray
<jstring
> *arg_vec
;
785 // The primary thread.
786 static java::lang::Thread
*main_thread
;
788 #ifndef DISABLE_GETENV_PROPERTIES
791 next_property_key (char *s
, size_t *length
)
797 // Skip over whitespace
801 // If we've reached the end, return NULL. Also return NULL if for
802 // some reason we've come across a malformed property string.
808 // Determine the length of the property key.
826 next_property_value (char *s
, size_t *length
)
842 // If we've reached the end, return NULL.
846 // Determine the length of the property value.
865 process_gcj_properties ()
867 char *props
= getenv("GCJ_PROPERTIES");
870 size_t property_count
= 0;
875 // Whip through props quickly in order to count the number of
877 while (p
&& (p
= next_property_key (p
, &length
)))
879 // Skip to the end of the key
882 p
= next_property_value (p
, &length
);
889 // Allocate an array of property value/key pairs.
890 _Jv_Environment_Properties
=
891 (property_pair
*) malloc (sizeof(property_pair
)
892 * (property_count
+ 1));
894 // Go through the properties again, initializing _Jv_Properties
898 while (p
&& (p
= next_property_key (p
, &length
)))
900 _Jv_Environment_Properties
[property_count
].key
= p
;
901 _Jv_Environment_Properties
[property_count
].key_length
= length
;
903 // Skip to the end of the key
906 p
= next_property_value (p
, &length
);
908 _Jv_Environment_Properties
[property_count
].value
= p
;
909 _Jv_Environment_Properties
[property_count
].value_length
= length
;
916 memset ((void *) &_Jv_Environment_Properties
[property_count
],
917 0, sizeof (property_pair
));
921 // Null terminate the strings.
922 while (_Jv_Environment_Properties
[i
].key
)
924 _Jv_Environment_Properties
[i
].key
[_Jv_Environment_Properties
[i
].key_length
] = 0;
925 _Jv_Environment_Properties
[i
++].value
[_Jv_Environment_Properties
[i
].value_length
] = 0;
929 #endif // DISABLE_GETENV_PROPERTIES
933 _Jv_Utf8Const
*void_signature
;
934 _Jv_Utf8Const
*clinit_name
;
935 _Jv_Utf8Const
*init_name
;
936 _Jv_Utf8Const
*finit_name
;
938 bool runtimeInitialized
= false;
942 _Jv_CreateJavaVM (void* /*vm_args*/)
946 if (runtimeInitialized
)
949 runtimeInitialized
= true;
951 PROCESS_GCJ_PROPERTIES
;
955 _Jv_InitializeSyncMutex ();
957 /* Initialize Utf8 constants declared in jvm.h. */
958 void_signature
= _Jv_makeUtf8Const ("()V", 3);
959 clinit_name
= _Jv_makeUtf8Const ("<clinit>", 8);
960 init_name
= _Jv_makeUtf8Const ("<init>", 6);
961 finit_name
= _Jv_makeUtf8Const ("finit$", 6);
963 /* Initialize built-in classes to represent primitive TYPEs. */
964 _Jv_InitPrimClass (&_Jv_byteClass
, "byte", 'B', 1, &_Jv_byteVTable
);
965 _Jv_InitPrimClass (&_Jv_shortClass
, "short", 'S', 2, &_Jv_shortVTable
);
966 _Jv_InitPrimClass (&_Jv_intClass
, "int", 'I', 4, &_Jv_intVTable
);
967 _Jv_InitPrimClass (&_Jv_longClass
, "long", 'J', 8, &_Jv_longVTable
);
968 _Jv_InitPrimClass (&_Jv_booleanClass
, "boolean", 'Z', 1, &_Jv_booleanVTable
);
969 _Jv_InitPrimClass (&_Jv_charClass
, "char", 'C', 2, &_Jv_charVTable
);
970 _Jv_InitPrimClass (&_Jv_floatClass
, "float", 'F', 4, &_Jv_floatVTable
);
971 _Jv_InitPrimClass (&_Jv_doubleClass
, "double", 'D', 8, &_Jv_doubleVTable
);
972 _Jv_InitPrimClass (&_Jv_voidClass
, "void", 'V', 0, &_Jv_voidVTable
);
974 // Turn stack trace generation off while creating exception objects.
975 _Jv_InitClass (&java::lang::VMThrowable::class$
);
976 java::lang::VMThrowable::trace_enabled
= 0;
978 // We have to initialize this fairly early, to avoid circular class
979 // initialization. In particular we want to start the
980 // initialization of ClassLoader before we start the initialization
982 _Jv_InitClass (&java::lang::ClassLoader::class$
);
983 // Once the bootstrap loader is in place, change it into a kind of
984 // system loader, by having it read the class path.
985 gnu::gcj::runtime::VMClassLoader::initialize();
992 no_memory
= new java::lang::OutOfMemoryError
;
994 java::lang::VMThrowable::trace_enabled
= 1;
997 LTDL_SET_PRELOADED_SYMBOLS ();
1000 _Jv_platform_initialize ();
1004 _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady
);
1006 // Start the GC finalizer thread. A VirtualMachineError can be
1007 // thrown by the runtime if, say, threads aren't available. In this
1008 // case finalizers simply won't run.
1011 using namespace gnu::gcj::runtime
;
1012 FinalizerThread
*ft
= new FinalizerThread ();
1015 catch (java::lang::VirtualMachineError
*ignore
)
1023 _Jv_RunMain (jclass klass
, const char *name
, int argc
, const char **argv
,
1026 _Jv_SetArgs (argc
, argv
);
1028 java::lang::Runtime
*runtime
= NULL
;
1032 // Set this very early so that it is seen when java.lang.System
1035 _Jv_Jar_Class_Path
= strdup (name
);
1036 _Jv_CreateJavaVM (NULL
);
1038 // Get the Runtime here. We want to initialize it before searching
1039 // for `main'; that way it will be set up if `main' is a JNI method.
1040 runtime
= java::lang::Runtime::getRuntime ();
1042 #ifdef DISABLE_MAIN_ARGS
1043 arg_vec
= JvConvertArgv (0, 0);
1045 arg_vec
= JvConvertArgv (argc
- 1, argv
+ 1);
1048 using namespace gnu::gcj::runtime
;
1050 main_thread
= new FirstThread (klass
, arg_vec
);
1052 main_thread
= new FirstThread (JvNewStringLatin1 (name
),
1055 catch (java::lang::Throwable
*t
)
1057 java::lang::System::err
->println (JvNewStringLatin1
1058 ("Exception during runtime initialization"));
1059 t
->printStackTrace();
1063 _Jv_AttachCurrentThread (main_thread
);
1064 _Jv_ThreadRun (main_thread
);
1067 int status
= (int) java::lang::ThreadGroup::had_uncaught_exception
;
1068 runtime
->exit (status
);
1072 JvRunMain (jclass klass
, int argc
, const char **argv
)
1074 _Jv_RunMain (klass
, NULL
, argc
, argv
, false);
1079 // Parse a string and return a heap size.
1081 parse_heap_size (const char *spec
)
1084 unsigned long val
= strtoul (spec
, &end
, 10);
1085 if (*end
== 'k' || *end
== 'K')
1087 else if (*end
== 'm' || *end
== 'M')
1089 return (size_t) val
;
1092 // Set the initial heap size. This might be ignored by the GC layer.
1093 // This must be called before _Jv_RunMain.
1095 _Jv_SetInitialHeapSize (const char *arg
)
1097 size_t size
= parse_heap_size (arg
);
1098 _Jv_GCSetInitialHeapSize (size
);
1101 // Set the maximum heap size. This might be ignored by the GC layer.
1102 // This must be called before _Jv_RunMain.
1104 _Jv_SetMaximumHeapSize (const char *arg
)
1106 size_t size
= parse_heap_size (arg
);
1107 _Jv_GCSetMaximumHeapSize (size
);
1113 _Jv_Malloc (jsize size
)
1115 if (__builtin_expect (size
== 0, false))
1117 void *ptr
= malloc ((size_t) size
);
1118 if (__builtin_expect (ptr
== NULL
, false))
1124 _Jv_Realloc (void *ptr
, jsize size
)
1126 if (__builtin_expect (size
== 0, false))
1128 ptr
= realloc (ptr
, (size_t) size
);
1129 if (__builtin_expect (ptr
== NULL
, false))
1135 _Jv_MallocUnchecked (jsize size
)
1137 if (__builtin_expect (size
== 0, false))
1139 return malloc ((size_t) size
);
1143 _Jv_Free (void* ptr
)
1150 // In theory, these routines can be #ifdef'd away on machines which
1151 // support divide overflow signals. However, we never know if some
1152 // code might have been compiled with "-fuse-divide-subroutine", so we
1153 // always include them in libgcj.
1156 _Jv_divI (jint dividend
, jint divisor
)
1158 if (__builtin_expect (divisor
== 0, false))
1160 java::lang::ArithmeticException
*arithexception
1161 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1162 throw arithexception
;
1165 if (dividend
== (jint
) 0x80000000L
&& divisor
== -1)
1168 return dividend
/ divisor
;
1172 _Jv_remI (jint dividend
, jint divisor
)
1174 if (__builtin_expect (divisor
== 0, false))
1176 java::lang::ArithmeticException
*arithexception
1177 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1178 throw arithexception
;
1181 if (dividend
== (jint
) 0x80000000L
&& divisor
== -1)
1184 return dividend
% divisor
;
1188 _Jv_divJ (jlong dividend
, jlong divisor
)
1190 if (__builtin_expect (divisor
== 0, false))
1192 java::lang::ArithmeticException
*arithexception
1193 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1194 throw arithexception
;
1197 if (dividend
== (jlong
) 0x8000000000000000LL
&& divisor
== -1)
1200 return dividend
/ divisor
;
1204 _Jv_remJ (jlong dividend
, jlong divisor
)
1206 if (__builtin_expect (divisor
== 0, false))
1208 java::lang::ArithmeticException
*arithexception
1209 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1210 throw arithexception
;
1213 if (dividend
== (jlong
) 0x8000000000000000LL
&& divisor
== -1)
1216 return dividend
% divisor
;
1221 // Return true if SELF_KLASS can access a field or method in
1222 // OTHER_KLASS. The field or method's access flags are specified in
1225 _Jv_CheckAccess (jclass self_klass
, jclass other_klass
, jint flags
)
1227 using namespace java::lang::reflect
;
1228 return ((self_klass
== other_klass
)
1229 || ((flags
& Modifier::PUBLIC
) != 0)
1230 || (((flags
& Modifier::PROTECTED
) != 0)
1231 && other_klass
->isAssignableFrom (self_klass
))
1232 || (((flags
& Modifier::PRIVATE
) == 0)
1233 && _Jv_ClassNameSamePackage (self_klass
->name
,
1234 other_klass
->name
)));