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 // 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. SIZE is the size of the object
393 // to allocate. You might think this is redundant, but it isn't; some
394 // classes, such as String, aren't of fixed size.
395 // First a version that assumes that we have no finalizer, and that
396 // the class is already initialized.
397 // If we know that JVMPI is disabled, this can be replaced by a direct call
398 // to the allocator for the appropriate GC.
400 _Jv_AllocObjectNoInitNoFinalizer (jclass klass
, jint size
)
402 jobject obj
= (jobject
) _Jv_AllocObj (size
, klass
);
403 jvmpi_notify_alloc (klass
, size
, obj
);
407 // And now a version that initializes if necessary.
409 _Jv_AllocObjectNoFinalizer (jclass klass
, jint size
)
411 _Jv_InitClass (klass
);
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
, jint size
)
421 jobject obj
= _Jv_AllocObjectNoFinalizer (klass
, size
);
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 // A version of the above that assumes the object contains no pointers,
436 // and requires no finalization. This can't happen if we need pointers
438 #ifdef JV_HASH_SYNCHRONIZATION
440 _Jv_AllocPtrFreeObject (jclass klass
, jint size
)
442 _Jv_InitClass (klass
);
444 jobject obj
= (jobject
) _Jv_AllocPtrFreeObj (size
, klass
);
447 // Service JVMPI request.
449 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC
!= 0, false))
453 event
.event_type
= JVMPI_EVENT_OBJECT_ALLOC
;
455 event
.u
.obj_alloc
.arena_id
= 0;
456 event
.u
.obj_alloc
.class_id
= (jobjectID
) klass
;
457 event
.u
.obj_alloc
.is_array
= 0;
458 event
.u
.obj_alloc
.size
= size
;
459 event
.u
.obj_alloc
.obj_id
= (jobjectID
) obj
;
462 (*_Jv_JVMPI_Notify_OBJECT_ALLOC
) (&event
);
469 #endif /* JV_HASH_SYNCHRONIZATION */
472 // Allocate a new array of Java objects. Each object is of type
473 // `elementClass'. `init' is used to initialize each slot in the
476 _Jv_NewObjectArray (jsize count
, jclass elementClass
, jobject init
)
478 if (__builtin_expect (count
< 0, false))
479 throw new java::lang::NegativeArraySizeException
;
481 JvAssert (! elementClass
->isPrimitive ());
483 // Ensure that elements pointer is properly aligned.
484 jobjectArray obj
= NULL
;
485 size_t size
= (size_t) elements (obj
);
486 // Check for overflow.
487 if (__builtin_expect ((size_t) count
>
488 (MAX_OBJECT_SIZE
- 1 - size
) / sizeof (jobject
), false))
491 size
+= count
* sizeof (jobject
);
493 jclass klass
= _Jv_GetArrayClass (elementClass
,
494 elementClass
->getClassLoaderInternal());
496 obj
= (jobjectArray
) _Jv_AllocArray (size
, klass
);
498 jsize
*lp
= const_cast<jsize
*> (&obj
->length
);
500 // We know the allocator returns zeroed memory. So don't bother
504 jobject
*ptr
= elements(obj
);
511 // Allocate a new array of primitives. ELTYPE is the type of the
512 // element, COUNT is the size of the array.
514 _Jv_NewPrimArray (jclass eltype
, jint count
)
516 int elsize
= eltype
->size();
517 if (__builtin_expect (count
< 0, false))
518 throw new java::lang::NegativeArraySizeException
;
520 JvAssert (eltype
->isPrimitive ());
521 jobject dummy
= NULL
;
522 size_t size
= (size_t) _Jv_GetArrayElementFromElementType (dummy
, eltype
);
524 // Check for overflow.
525 if (__builtin_expect ((size_t) count
>
526 (MAX_OBJECT_SIZE
- size
) / elsize
, false))
529 jclass klass
= _Jv_GetArrayClass (eltype
, 0);
531 # ifdef JV_HASH_SYNCHRONIZATION
532 // Since the vtable is always statically allocated,
533 // these are completely pointerfree! Make sure the GC doesn't touch them.
535 (__JArray
*) _Jv_AllocPtrFreeObj (size
+ elsize
* count
, klass
);
536 memset((char *)arr
+ size
, 0, elsize
* count
);
538 __JArray
*arr
= (__JArray
*) _Jv_AllocObj (size
+ elsize
* count
, klass
);
539 // Note that we assume we are given zeroed memory by the allocator.
542 jsize
*lp
= const_cast<jsize
*> (&arr
->length
);
549 _Jv_NewArray (jint type
, jint size
)
553 case 4: return JvNewBooleanArray (size
);
554 case 5: return JvNewCharArray (size
);
555 case 6: return JvNewFloatArray (size
);
556 case 7: return JvNewDoubleArray (size
);
557 case 8: return JvNewByteArray (size
);
558 case 9: return JvNewShortArray (size
);
559 case 10: return JvNewIntArray (size
);
560 case 11: return JvNewLongArray (size
);
562 throw new java::lang::InternalError
563 (JvNewStringLatin1 ("invalid type code in _Jv_NewArray"));
566 // Allocate a possibly multi-dimensional array but don't check that
567 // any array length is <0.
569 _Jv_NewMultiArrayUnchecked (jclass type
, jint dimensions
, jint
*sizes
)
571 JvAssert (type
->isArray());
572 jclass element_type
= type
->getComponentType();
574 if (element_type
->isPrimitive())
575 result
= _Jv_NewPrimArray (element_type
, sizes
[0]);
577 result
= _Jv_NewObjectArray (sizes
[0], element_type
, NULL
);
581 JvAssert (! element_type
->isPrimitive());
582 JvAssert (element_type
->isArray());
583 jobject
*contents
= elements ((jobjectArray
) result
);
584 for (int i
= 0; i
< sizes
[0]; ++i
)
585 contents
[i
] = _Jv_NewMultiArrayUnchecked (element_type
, dimensions
- 1,
593 _Jv_NewMultiArray (jclass type
, jint dimensions
, jint
*sizes
)
595 for (int i
= 0; i
< dimensions
; ++i
)
597 throw new java::lang::NegativeArraySizeException
;
599 return _Jv_NewMultiArrayUnchecked (type
, dimensions
, sizes
);
603 _Jv_NewMultiArray (jclass array_type
, jint dimensions
, ...)
606 jint sizes
[dimensions
];
607 va_start (args
, dimensions
);
608 for (int i
= 0; i
< dimensions
; ++i
)
610 jint size
= va_arg (args
, jint
);
612 throw new java::lang::NegativeArraySizeException
;
617 return _Jv_NewMultiArrayUnchecked (array_type
, dimensions
, sizes
);
622 // Ensure 8-byte alignment, for hash synchronization.
623 #define DECLARE_PRIM_TYPE(NAME) \
624 _Jv_ArrayVTable _Jv_##NAME##VTable; \
625 java::lang::Class _Jv_##NAME##Class __attribute__ ((aligned (8)));
627 DECLARE_PRIM_TYPE(byte
)
628 DECLARE_PRIM_TYPE(short)
629 DECLARE_PRIM_TYPE(int)
630 DECLARE_PRIM_TYPE(long)
631 DECLARE_PRIM_TYPE(boolean
)
632 DECLARE_PRIM_TYPE(char)
633 DECLARE_PRIM_TYPE(float)
634 DECLARE_PRIM_TYPE(double)
635 DECLARE_PRIM_TYPE(void)
638 _Jv_InitPrimClass (jclass cl
, char *cname
, char sig
, int len
,
639 _Jv_ArrayVTable
*array_vtable
)
641 using namespace java::lang::reflect
;
643 // We must set the vtable for the class; the Java constructor
645 (*(_Jv_VTable
**) cl
) = java::lang::Class::class$
.vtable
;
647 // Initialize the fields we care about. We do this in the same
648 // order they are declared in Class.h.
649 cl
->name
= _Jv_makeUtf8Const ((char *) cname
, -1);
650 cl
->accflags
= Modifier::PUBLIC
| Modifier::FINAL
| Modifier::ABSTRACT
;
651 cl
->method_count
= sig
;
652 cl
->size_in_bytes
= len
;
653 cl
->vtable
= JV_PRIMITIVE_VTABLE
;
654 cl
->state
= JV_STATE_DONE
;
657 _Jv_NewArrayClass (cl
, NULL
, (_Jv_VTable
*) array_vtable
);
661 _Jv_FindClassFromSignature (char *sig
, java::lang::ClassLoader
*loader
)
666 return JvPrimClass (byte
);
668 return JvPrimClass (short);
670 return JvPrimClass (int);
672 return JvPrimClass (long);
674 return JvPrimClass (boolean
);
676 return JvPrimClass (char);
678 return JvPrimClass (float);
680 return JvPrimClass (double);
682 return JvPrimClass (void);
686 for (i
= 1; sig
[i
] && sig
[i
] != ';'; ++i
)
688 _Jv_Utf8Const
*name
= _Jv_makeUtf8Const (&sig
[1], i
- 1);
689 return _Jv_FindClass (name
, loader
);
693 jclass klass
= _Jv_FindClassFromSignature (&sig
[1], loader
);
696 return _Jv_GetArrayClass (klass
, loader
);
700 return NULL
; // Placate compiler.
706 JvConvertArgv (int argc
, const char **argv
)
710 jobjectArray ar
= JvNewObjectArray(argc
, &StringClass
, NULL
);
711 jobject
*ptr
= elements(ar
);
712 jbyteArray bytes
= NULL
;
713 for (int i
= 0; i
< argc
; i
++)
715 const char *arg
= argv
[i
];
716 int len
= strlen (arg
);
717 if (bytes
== NULL
|| bytes
->length
< len
)
718 bytes
= JvNewByteArray (len
);
719 jbyte
*bytePtr
= elements (bytes
);
720 // We assume jbyte == char.
721 memcpy (bytePtr
, arg
, len
);
723 // Now convert using the default encoding.
724 *ptr
++ = new java::lang::String (bytes
, 0, len
);
726 return (JArray
<jstring
>*) ar
;
729 // FIXME: These variables are static so that they will be
730 // automatically scanned by the Boehm collector. This is needed
731 // because with qthreads the collector won't scan the initial stack --
732 // it will only scan the qthreads stacks.
734 // Command line arguments.
735 static JArray
<jstring
> *arg_vec
;
737 // The primary thread.
738 static java::lang::Thread
*main_thread
;
740 #ifndef DISABLE_GETENV_PROPERTIES
743 next_property_key (char *s
, size_t *length
)
749 // Skip over whitespace
753 // If we've reached the end, return NULL. Also return NULL if for
754 // some reason we've come across a malformed property string.
760 // Determine the length of the property key.
778 next_property_value (char *s
, size_t *length
)
794 // If we've reached the end, return NULL.
798 // Determine the length of the property value.
817 process_gcj_properties ()
819 char *props
= getenv("GCJ_PROPERTIES");
822 size_t property_count
= 0;
827 // Whip through props quickly in order to count the number of
829 while (p
&& (p
= next_property_key (p
, &length
)))
831 // Skip to the end of the key
834 p
= next_property_value (p
, &length
);
841 // Allocate an array of property value/key pairs.
842 _Jv_Environment_Properties
=
843 (property_pair
*) malloc (sizeof(property_pair
)
844 * (property_count
+ 1));
846 // Go through the properties again, initializing _Jv_Properties
850 while (p
&& (p
= next_property_key (p
, &length
)))
852 _Jv_Environment_Properties
[property_count
].key
= p
;
853 _Jv_Environment_Properties
[property_count
].key_length
= length
;
855 // Skip to the end of the key
858 p
= next_property_value (p
, &length
);
860 _Jv_Environment_Properties
[property_count
].value
= p
;
861 _Jv_Environment_Properties
[property_count
].value_length
= length
;
868 memset ((void *) &_Jv_Environment_Properties
[property_count
],
869 0, sizeof (property_pair
));
873 // Null terminate the strings.
874 while (_Jv_Environment_Properties
[i
].key
)
876 _Jv_Environment_Properties
[i
].key
[_Jv_Environment_Properties
[i
].key_length
] = 0;
877 _Jv_Environment_Properties
[i
++].value
[_Jv_Environment_Properties
[i
].value_length
] = 0;
881 #endif // DISABLE_GETENV_PROPERTIES
885 _Jv_Utf8Const
*void_signature
;
886 _Jv_Utf8Const
*clinit_name
;
887 _Jv_Utf8Const
*init_name
;
888 _Jv_Utf8Const
*finit_name
;
890 bool runtimeInitialized
= false;
894 _Jv_CreateJavaVM (void* /*vm_args*/)
898 if (runtimeInitialized
)
901 runtimeInitialized
= true;
903 PROCESS_GCJ_PROPERTIES
;
907 _Jv_InitializeSyncMutex ();
909 /* Initialize Utf8 constants declared in jvm.h. */
910 void_signature
= _Jv_makeUtf8Const ("()V", 3);
911 clinit_name
= _Jv_makeUtf8Const ("<clinit>", 8);
912 init_name
= _Jv_makeUtf8Const ("<init>", 6);
913 finit_name
= _Jv_makeUtf8Const ("finit$", 6);
915 /* Initialize built-in classes to represent primitive TYPEs. */
916 _Jv_InitPrimClass (&_Jv_byteClass
, "byte", 'B', 1, &_Jv_byteVTable
);
917 _Jv_InitPrimClass (&_Jv_shortClass
, "short", 'S', 2, &_Jv_shortVTable
);
918 _Jv_InitPrimClass (&_Jv_intClass
, "int", 'I', 4, &_Jv_intVTable
);
919 _Jv_InitPrimClass (&_Jv_longClass
, "long", 'J', 8, &_Jv_longVTable
);
920 _Jv_InitPrimClass (&_Jv_booleanClass
, "boolean", 'Z', 1, &_Jv_booleanVTable
);
921 _Jv_InitPrimClass (&_Jv_charClass
, "char", 'C', 2, &_Jv_charVTable
);
922 _Jv_InitPrimClass (&_Jv_floatClass
, "float", 'F', 4, &_Jv_floatVTable
);
923 _Jv_InitPrimClass (&_Jv_doubleClass
, "double", 'D', 8, &_Jv_doubleVTable
);
924 _Jv_InitPrimClass (&_Jv_voidClass
, "void", 'V', 0, &_Jv_voidVTable
);
926 // Turn stack trace generation off while creating exception objects.
927 _Jv_InitClass (&java::lang::VMThrowable::class$
);
928 java::lang::VMThrowable::trace_enabled
= 0;
935 no_memory
= new java::lang::OutOfMemoryError
;
937 java::lang::VMThrowable::trace_enabled
= 1;
940 LTDL_SET_PRELOADED_SYMBOLS ();
943 _Jv_platform_initialize ();
947 _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady
);
949 // Start the GC finalizer thread. A VirtualMachineError can be
950 // thrown by the runtime if, say, threads aren't available. In this
951 // case finalizers simply won't run.
954 using namespace gnu::gcj::runtime
;
955 FinalizerThread
*ft
= new FinalizerThread ();
958 catch (java::lang::VirtualMachineError
*ignore
)
966 _Jv_RunMain (jclass klass
, const char *name
, int argc
, const char **argv
,
969 _Jv_SetArgs (argc
, argv
);
971 java::lang::Runtime
*runtime
= NULL
;
975 // Set this very early so that it is seen when java.lang.System
978 _Jv_Jar_Class_Path
= strdup (name
);
979 _Jv_CreateJavaVM (NULL
);
981 // Get the Runtime here. We want to initialize it before searching
982 // for `main'; that way it will be set up if `main' is a JNI method.
983 runtime
= java::lang::Runtime::getRuntime ();
985 #ifdef DISABLE_MAIN_ARGS
986 arg_vec
= JvConvertArgv (0, 0);
988 arg_vec
= JvConvertArgv (argc
- 1, argv
+ 1);
991 // We have to initialize this fairly early, to avoid circular
992 // class initialization. In particular we want to start the
993 // initialization of ClassLoader before we start the
994 // initialization of VMClassLoader.
995 _Jv_InitClass (&java::lang::ClassLoader::class$
);
997 using namespace gnu::gcj::runtime
;
999 main_thread
= new FirstThread (klass
, arg_vec
);
1001 main_thread
= new FirstThread (JvNewStringLatin1 (name
),
1004 catch (java::lang::Throwable
*t
)
1006 java::lang::System::err
->println (JvNewStringLatin1
1007 ("Exception during runtime initialization"));
1008 t
->printStackTrace();
1012 _Jv_AttachCurrentThread (main_thread
);
1013 _Jv_ThreadRun (main_thread
);
1016 int status
= (int) java::lang::ThreadGroup::had_uncaught_exception
;
1017 runtime
->exit (status
);
1021 JvRunMain (jclass klass
, int argc
, const char **argv
)
1023 _Jv_RunMain (klass
, NULL
, argc
, argv
, false);
1028 // Parse a string and return a heap size.
1030 parse_heap_size (const char *spec
)
1033 unsigned long val
= strtoul (spec
, &end
, 10);
1034 if (*end
== 'k' || *end
== 'K')
1036 else if (*end
== 'm' || *end
== 'M')
1038 return (size_t) val
;
1041 // Set the initial heap size. This might be ignored by the GC layer.
1042 // This must be called before _Jv_RunMain.
1044 _Jv_SetInitialHeapSize (const char *arg
)
1046 size_t size
= parse_heap_size (arg
);
1047 _Jv_GCSetInitialHeapSize (size
);
1050 // Set the maximum heap size. This might be ignored by the GC layer.
1051 // This must be called before _Jv_RunMain.
1053 _Jv_SetMaximumHeapSize (const char *arg
)
1055 size_t size
= parse_heap_size (arg
);
1056 _Jv_GCSetMaximumHeapSize (size
);
1062 _Jv_Malloc (jsize size
)
1064 if (__builtin_expect (size
== 0, false))
1066 void *ptr
= malloc ((size_t) size
);
1067 if (__builtin_expect (ptr
== NULL
, false))
1073 _Jv_Realloc (void *ptr
, jsize size
)
1075 if (__builtin_expect (size
== 0, false))
1077 ptr
= realloc (ptr
, (size_t) size
);
1078 if (__builtin_expect (ptr
== NULL
, false))
1084 _Jv_MallocUnchecked (jsize size
)
1086 if (__builtin_expect (size
== 0, false))
1088 return malloc ((size_t) size
);
1092 _Jv_Free (void* ptr
)
1099 // In theory, these routines can be #ifdef'd away on machines which
1100 // support divide overflow signals. However, we never know if some
1101 // code might have been compiled with "-fuse-divide-subroutine", so we
1102 // always include them in libgcj.
1105 _Jv_divI (jint dividend
, jint divisor
)
1107 if (__builtin_expect (divisor
== 0, false))
1109 java::lang::ArithmeticException
*arithexception
1110 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1111 throw arithexception
;
1114 if (dividend
== (jint
) 0x80000000L
&& divisor
== -1)
1117 return dividend
/ divisor
;
1121 _Jv_remI (jint dividend
, jint divisor
)
1123 if (__builtin_expect (divisor
== 0, false))
1125 java::lang::ArithmeticException
*arithexception
1126 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1127 throw arithexception
;
1130 if (dividend
== (jint
) 0x80000000L
&& divisor
== -1)
1133 return dividend
% divisor
;
1137 _Jv_divJ (jlong dividend
, jlong divisor
)
1139 if (__builtin_expect (divisor
== 0, false))
1141 java::lang::ArithmeticException
*arithexception
1142 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1143 throw arithexception
;
1146 if (dividend
== (jlong
) 0x8000000000000000LL
&& divisor
== -1)
1149 return dividend
/ divisor
;
1153 _Jv_remJ (jlong dividend
, jlong divisor
)
1155 if (__builtin_expect (divisor
== 0, false))
1157 java::lang::ArithmeticException
*arithexception
1158 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1159 throw arithexception
;
1162 if (dividend
== (jlong
) 0x8000000000000000LL
&& divisor
== -1)
1165 return dividend
% divisor
;
1170 // Return true if SELF_KLASS can access a field or method in
1171 // OTHER_KLASS. The field or method's access flags are specified in
1174 _Jv_CheckAccess (jclass self_klass
, jclass other_klass
, jint flags
)
1176 using namespace java::lang::reflect
;
1177 return ((self_klass
== other_klass
)
1178 || ((flags
& Modifier::PUBLIC
) != 0)
1179 || (((flags
& Modifier::PROTECTED
) != 0)
1180 && other_klass
->isAssignableFrom (self_klass
))
1181 || (((flags
& Modifier::PRIVATE
) == 0)
1182 && _Jv_ClassNameSamePackage (self_klass
->name
,
1183 other_klass
->name
)));