1 // prims.cc - Code for core of runtime environment.
3 /* Copyright (C) 1998, 1999, 2000, 2001 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
13 #ifdef USE_WIN32_SIGNALLING
15 #endif /* USE_WIN32_SIGNALLING */
18 #undef __INSIDE_CYGWIN__
20 #endif /* USE_WINSOCK */
34 #include <java-signal.h>
35 #include <java-threads.h>
39 #include <java/lang/ThreadGroup.h>
42 #ifndef DISABLE_GETENV_PROPERTIES
44 #include <java-props.h>
45 #define PROCESS_GCJ_PROPERTIES process_gcj_properties()
47 #define PROCESS_GCJ_PROPERTIES
48 #endif // DISABLE_GETENV_PROPERTIES
50 #include <java/lang/Class.h>
51 #include <java/lang/ClassLoader.h>
52 #include <java/lang/Runtime.h>
53 #include <java/lang/String.h>
54 #include <java/lang/Thread.h>
55 #include <java/lang/ThreadGroup.h>
56 #include <java/lang/ArrayIndexOutOfBoundsException.h>
57 #include <java/lang/ArithmeticException.h>
58 #include <java/lang/ClassFormatError.h>
59 #include <java/lang/NegativeArraySizeException.h>
60 #include <java/lang/NullPointerException.h>
61 #include <java/lang/OutOfMemoryError.h>
62 #include <java/lang/System.h>
63 #include <java/lang/reflect/Modifier.h>
64 #include <java/io/PrintStream.h>
65 #include <java/lang/UnsatisfiedLinkError.h>
66 #include <java/lang/VirtualMachineError.h>
67 #include <gnu/gcj/runtime/VMClassLoader.h>
68 #include <gnu/gcj/runtime/FinalizerThread.h>
69 #include <gnu/gcj/runtime/FirstThread.h>
75 // We allocate a single OutOfMemoryError exception which we keep
76 // around for use if we run out of memory.
77 static java::lang::OutOfMemoryError
*no_memory
;
79 // Largest representable size_t.
80 #define SIZE_T_MAX ((size_t) (~ (size_t) 0))
82 static const char *no_properties
[] = { NULL
};
84 // Properties set at compile time.
85 const char **_Jv_Compiler_Properties
= no_properties
;
87 // The JAR file to add to the beginning of java.class.path.
88 const char *_Jv_Jar_Class_Path
;
90 #ifndef DISABLE_GETENV_PROPERTIES
91 // Property key/value pairs.
92 property_pair
*_Jv_Environment_Properties
;
95 // The name of this executable.
96 static char *_Jv_execName
;
98 // Stash the argv pointer to benefit native libraries that need it.
99 const char **_Jv_argv
;
103 // Pointer to JVMPI notification functions.
104 void (*_Jv_JVMPI_Notify_OBJECT_ALLOC
) (JVMPI_Event
*event
);
105 void (*_Jv_JVMPI_Notify_THREAD_START
) (JVMPI_Event
*event
);
106 void (*_Jv_JVMPI_Notify_THREAD_END
) (JVMPI_Event
*event
);
110 extern "C" void _Jv_ThrowSignal (jthrowable
) __attribute ((noreturn
));
112 // Just like _Jv_Throw, but fill in the stack trace first. Although
113 // this is declared extern in order that its name not be mangled, it
114 // is not intended to be used outside this file.
116 _Jv_ThrowSignal (jthrowable throwable
)
118 throwable
->fillInStackTrace ();
123 static java::lang::NullPointerException
*nullp
;
125 SIGNAL_HANDLER (catch_segv
)
127 MAKE_THROW_FRAME (nullp
);
128 _Jv_ThrowSignal (nullp
);
132 static java::lang::ArithmeticException
*arithexception
;
135 SIGNAL_HANDLER (catch_fpe
)
137 #ifdef HANDLE_DIVIDE_OVERFLOW
138 HANDLE_DIVIDE_OVERFLOW
;
140 MAKE_THROW_FRAME (arithexception
);
142 _Jv_ThrowSignal (arithexception
);
149 _Jv_equalUtf8Consts (Utf8Const
* a
, Utf8Const
*b
)
152 _Jv_ushort
*aptr
, *bptr
;
155 if (a
->hash
!= b
->hash
)
158 if (b
->length
!= len
)
160 aptr
= (_Jv_ushort
*)a
->data
;
161 bptr
= (_Jv_ushort
*)b
->data
;
162 len
= (len
+ 1) >> 1;
164 if (*aptr
++ != *bptr
++)
169 /* True iff A is equal to STR.
170 HASH is STR->hashCode().
174 _Jv_equal (Utf8Const
* a
, jstring str
, jint hash
)
176 if (a
->hash
!= (_Jv_ushort
) hash
)
178 jint len
= str
->length();
180 jchar
*sptr
= _Jv_GetStringChars (str
);
181 unsigned char* ptr
= (unsigned char*) a
->data
;
182 unsigned char* limit
= ptr
+ a
->length
;
185 int ch
= UTF8_GET (ptr
, limit
);
194 /* Like _Jv_equal, but stop after N characters. */
196 _Jv_equaln (Utf8Const
*a
, jstring str
, jint n
)
198 jint len
= str
->length();
200 jchar
*sptr
= _Jv_GetStringChars (str
);
201 unsigned char* ptr
= (unsigned char*) a
->data
;
202 unsigned char* limit
= ptr
+ a
->length
;
203 for (; n
-- > 0; i
++, sptr
++)
205 int ch
= UTF8_GET (ptr
, limit
);
214 /* Count the number of Unicode chars encoded in a given Ut8 string. */
216 _Jv_strLengthUtf8(char* str
, int len
)
219 unsigned char* limit
;
222 ptr
= (unsigned char*) str
;
225 for (; ptr
< limit
; str_length
++)
227 if (UTF8_GET (ptr
, limit
) < 0)
233 /* Calculate a hash value for a string encoded in Utf8 format.
234 * This returns the same hash value as specified or java.lang.String.hashCode.
237 hashUtf8String (char* str
, int len
)
239 unsigned char* ptr
= (unsigned char*) str
;
240 unsigned char* limit
= ptr
+ len
;
245 int ch
= UTF8_GET (ptr
, limit
);
246 /* Updated specification from
247 http://www.javasoft.com/docs/books/jls/clarify.html. */
248 hash
= (31 * hash
) + ch
;
254 _Jv_makeUtf8Const (char* s
, int len
)
258 Utf8Const
* m
= (Utf8Const
*) _Jv_AllocBytes (sizeof(Utf8Const
) + len
+ 1);
261 memcpy (m
->data
, s
, len
);
264 m
->hash
= hashUtf8String (s
, len
) & 0xFFFF;
269 _Jv_makeUtf8Const (jstring string
)
271 jint hash
= string
->hashCode ();
272 jint len
= _Jv_GetStringUTFLength (string
);
274 Utf8Const
* m
= (Utf8Const
*)
275 _Jv_AllocBytes (sizeof(Utf8Const
) + len
+ 1);
280 _Jv_GetStringUTFRegion (string
, 0, string
->length (), m
->data
);
290 _Jv_Abort (const char *function
, const char *file
, int line
,
294 _Jv_Abort (const char *, const char *, int, const char *message
)
299 "libgcj failure: %s\n in function %s, file %s, line %d\n",
300 message
, function
, file
, line
);
302 fprintf (stderr
, "libgcj failure: %s\n", message
);
308 fail_on_finalization (jobject
)
310 JvFail ("object was finalized");
314 _Jv_GCWatch (jobject obj
)
316 _Jv_RegisterFinalizer (obj
, fail_on_finalization
);
320 _Jv_ThrowBadArrayIndex(jint bad_index
)
322 throw new java::lang::ArrayIndexOutOfBoundsException
323 (java::lang::String::valueOf (bad_index
));
327 _Jv_ThrowNullPointerException ()
329 throw new java::lang::NullPointerException
;
332 // Explicitly throw a no memory exception.
333 // The collector calls this when it encounters an out-of-memory condition.
334 void _Jv_ThrowNoMemory()
336 _Jv_Throw (no_memory
);
339 // Allocate a new object of class KLASS. SIZE is the size of the object
340 // to allocate. You might think this is redundant, but it isn't; some
341 // classes, such as String, aren't of fixed size.
343 _Jv_AllocObject (jclass klass
, jint size
)
345 _Jv_InitClass (klass
);
347 jobject obj
= (jobject
) _Jv_AllocObj (size
, klass
);
349 // If this class has inherited finalize from Object, then don't
350 // bother registering a finalizer. We know that finalize() is the
351 // very first method after the dummy entry. If this turns out to be
352 // unreliable, a more robust implementation can be written. Such an
353 // implementation would look for Object.finalize in Object's method
354 // table at startup, and then use that information to find the
355 // appropriate index in the method vector.
356 if (klass
->vtable
->get_finalizer()
357 != java::lang::Object::class$
.vtable
->get_finalizer())
358 _Jv_RegisterFinalizer (obj
, _Jv_FinalizeObject
);
361 // Service JVMPI 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
);
392 // A version of the above that assumes the object contains no pointers,
393 // and requires no finalization. This can't happen if we need pointers
395 #ifdef JV_HASH_SYNCHRONIZATION
397 _Jv_AllocPtrFreeObject (jclass klass
, jint size
)
399 _Jv_InitClass (klass
);
401 jobject obj
= (jobject
) _Jv_AllocPtrFreeObj (size
, klass
);
404 // Service JVMPI request.
406 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC
!= 0, false))
410 event
.event_type
= JVMPI_EVENT_OBJECT_ALLOC
;
412 event
.u
.obj_alloc
.arena_id
= 0;
413 event
.u
.obj_alloc
.class_id
= (jobjectID
) klass
;
414 event
.u
.obj_alloc
.is_array
= 0;
415 event
.u
.obj_alloc
.size
= size
;
416 event
.u
.obj_alloc
.obj_id
= (jobjectID
) obj
;
419 (*_Jv_JVMPI_Notify_OBJECT_ALLOC
) (&event
);
426 #endif /* JV_HASH_SYNCHRONIZATION */
429 // Allocate a new array of Java objects. Each object is of type
430 // `elementClass'. `init' is used to initialize each slot in the
433 _Jv_NewObjectArray (jsize count
, jclass elementClass
, jobject init
)
435 if (__builtin_expect (count
< 0, false))
436 throw new java::lang::NegativeArraySizeException
;
438 JvAssert (! elementClass
->isPrimitive ());
440 // Ensure that elements pointer is properly aligned.
441 jobjectArray obj
= NULL
;
442 size_t size
= (size_t) elements (obj
);
443 size
+= count
* sizeof (jobject
);
445 // FIXME: second argument should be "current loader"
446 jclass klass
= _Jv_GetArrayClass (elementClass
, 0);
448 obj
= (jobjectArray
) _Jv_AllocArray (size
, klass
);
450 jsize
*lp
= const_cast<jsize
*> (&obj
->length
);
452 // We know the allocator returns zeroed memory. So don't bother
456 jobject
*ptr
= elements(obj
);
463 // Allocate a new array of primitives. ELTYPE is the type of the
464 // element, COUNT is the size of the array.
466 _Jv_NewPrimArray (jclass eltype
, jint count
)
468 int elsize
= eltype
->size();
469 if (__builtin_expect (count
< 0, false))
470 throw new java::lang::NegativeArraySizeException
;
472 JvAssert (eltype
->isPrimitive ());
473 jobject dummy
= NULL
;
474 size_t size
= (size_t) _Jv_GetArrayElementFromElementType (dummy
, eltype
);
476 // Check for overflow.
477 if (__builtin_expect ((size_t) count
>
478 (SIZE_T_MAX
- size
) / elsize
, false))
481 jclass klass
= _Jv_GetArrayClass (eltype
, 0);
483 # ifdef JV_HASH_SYNCHRONIZATION
484 // Since the vtable is always statically allocated,
485 // these are completely pointerfree! Make sure the GC doesn't touch them.
487 (__JArray
*) _Jv_AllocPtrFreeObj (size
+ elsize
* count
, klass
);
488 memset((char *)arr
+ size
, 0, elsize
* count
);
490 __JArray
*arr
= (__JArray
*) _Jv_AllocObj (size
+ elsize
* count
, klass
);
491 // Note that we assume we are given zeroed memory by the allocator.
494 jsize
*lp
= const_cast<jsize
*> (&arr
->length
);
501 _Jv_NewArray (jint type
, jint size
)
505 case 4: return JvNewBooleanArray (size
);
506 case 5: return JvNewCharArray (size
);
507 case 6: return JvNewFloatArray (size
);
508 case 7: return JvNewDoubleArray (size
);
509 case 8: return JvNewByteArray (size
);
510 case 9: return JvNewShortArray (size
);
511 case 10: return JvNewIntArray (size
);
512 case 11: return JvNewLongArray (size
);
514 JvFail ("newarray - bad type code");
515 return NULL
; // Placate compiler.
518 // Allocate a possibly multi-dimensional array but don't check that
519 // any array length is <0.
521 _Jv_NewMultiArrayUnchecked (jclass type
, jint dimensions
, jint
*sizes
)
523 JvAssert (type
->isArray());
524 jclass element_type
= type
->getComponentType();
526 if (element_type
->isPrimitive())
527 result
= _Jv_NewPrimArray (element_type
, sizes
[0]);
529 result
= _Jv_NewObjectArray (sizes
[0], element_type
, NULL
);
533 JvAssert (! element_type
->isPrimitive());
534 JvAssert (element_type
->isArray());
535 jobject
*contents
= elements ((jobjectArray
) result
);
536 for (int i
= 0; i
< sizes
[0]; ++i
)
537 contents
[i
] = _Jv_NewMultiArrayUnchecked (element_type
, dimensions
- 1,
545 _Jv_NewMultiArray (jclass type
, jint dimensions
, jint
*sizes
)
547 for (int i
= 0; i
< dimensions
; ++i
)
549 throw new java::lang::NegativeArraySizeException
;
551 return _Jv_NewMultiArrayUnchecked (type
, dimensions
, sizes
);
555 _Jv_NewMultiArray (jclass array_type
, jint dimensions
, ...)
558 jint sizes
[dimensions
];
559 va_start (args
, dimensions
);
560 for (int i
= 0; i
< dimensions
; ++i
)
562 jint size
= va_arg (args
, jint
);
564 throw new java::lang::NegativeArraySizeException
;
569 return _Jv_NewMultiArrayUnchecked (array_type
, dimensions
, sizes
);
574 #define DECLARE_PRIM_TYPE(NAME) \
575 _Jv_ArrayVTable _Jv_##NAME##VTable; \
576 java::lang::Class _Jv_##NAME##Class;
578 DECLARE_PRIM_TYPE(byte
);
579 DECLARE_PRIM_TYPE(short);
580 DECLARE_PRIM_TYPE(int);
581 DECLARE_PRIM_TYPE(long);
582 DECLARE_PRIM_TYPE(boolean
);
583 DECLARE_PRIM_TYPE(char);
584 DECLARE_PRIM_TYPE(float);
585 DECLARE_PRIM_TYPE(double);
586 DECLARE_PRIM_TYPE(void);
589 _Jv_InitPrimClass (jclass cl
, char *cname
, char sig
, int len
,
590 _Jv_ArrayVTable
*array_vtable
)
592 using namespace java::lang::reflect
;
594 // We must initialize every field of the class. We do this in the
595 // same order they are declared in Class.h, except for fields that
596 // are initialized to NULL.
597 cl
->name
= _Jv_makeUtf8Const ((char *) cname
, -1);
598 cl
->accflags
= Modifier::PUBLIC
| Modifier::FINAL
| Modifier::ABSTRACT
;
599 cl
->method_count
= sig
;
600 cl
->size_in_bytes
= len
;
601 cl
->vtable
= JV_PRIMITIVE_VTABLE
;
602 cl
->state
= JV_STATE_DONE
;
605 _Jv_NewArrayClass (cl
, NULL
, (_Jv_VTable
*) array_vtable
);
609 _Jv_FindClassFromSignature (char *sig
, java::lang::ClassLoader
*loader
)
614 return JvPrimClass (byte
);
616 return JvPrimClass (short);
618 return JvPrimClass (int);
620 return JvPrimClass (long);
622 return JvPrimClass (boolean
);
624 return JvPrimClass (char);
626 return JvPrimClass (float);
628 return JvPrimClass (double);
630 return JvPrimClass (void);
634 for (i
= 1; sig
[i
] && sig
[i
] != ';'; ++i
)
636 _Jv_Utf8Const
*name
= _Jv_makeUtf8Const (&sig
[1], i
- 1);
637 return _Jv_FindClass (name
, loader
);
642 jclass klass
= _Jv_FindClassFromSignature (&sig
[1], loader
);
645 return _Jv_GetArrayClass (klass
, loader
);
649 return NULL
; // Placate compiler.
655 JvConvertArgv (int argc
, const char **argv
)
659 jobjectArray ar
= JvNewObjectArray(argc
, &StringClass
, NULL
);
660 jobject
* ptr
= elements(ar
);
661 for (int i
= 0; i
< argc
; i
++)
663 const char *arg
= argv
[i
];
664 // FIXME - should probably use JvNewStringUTF.
665 *ptr
++ = JvNewStringLatin1(arg
, strlen(arg
));
667 return (JArray
<jstring
>*) ar
;
670 // FIXME: These variables are static so that they will be
671 // automatically scanned by the Boehm collector. This is needed
672 // because with qthreads the collector won't scan the initial stack --
673 // it will only scan the qthreads stacks.
675 // Command line arguments.
676 static JArray
<jstring
> *arg_vec
;
678 // The primary thread.
679 static java::lang::Thread
*main_thread
;
682 _Jv_ThisExecutable (void)
688 _Jv_ThisExecutable (const char *name
)
692 _Jv_execName
= (char *) _Jv_Malloc (strlen (name
) + 1);
693 strcpy (_Jv_execName
, name
);
697 #ifdef USE_WIN32_SIGNALLING
699 extern "C" int* win32_get_restart_frame (void *);
702 win32_exception_handler (LPEXCEPTION_POINTERS e
)
705 if (e
->ExceptionRecord
->ExceptionCode
== EXCEPTION_ACCESS_VIOLATION
)
706 setjmp_buf
= win32_get_restart_frame (nullp
);
707 else if (e
->ExceptionRecord
->ExceptionCode
== EXCEPTION_INT_DIVIDE_BY_ZERO
)
708 setjmp_buf
= win32_get_restart_frame (arithexception
);
710 return EXCEPTION_CONTINUE_SEARCH
;
712 e
->ContextRecord
->Ebp
= setjmp_buf
[0];
713 // FIXME: Why does i386-signal.h increment the PC here, do we need to do it?
714 e
->ContextRecord
->Eip
= setjmp_buf
[1];
715 // FIXME: Is this the stack pointer? Do we need it?
716 e
->ContextRecord
->Esp
= setjmp_buf
[2];
718 return EXCEPTION_CONTINUE_EXECUTION
;
723 #ifndef DISABLE_GETENV_PROPERTIES
726 next_property_key (char *s
, size_t *length
)
732 // Skip over whitespace
736 // If we've reached the end, return NULL. Also return NULL if for
737 // some reason we've come across a malformed property string.
743 // Determine the length of the property key.
761 next_property_value (char *s
, size_t *length
)
777 // If we've reached the end, return NULL.
781 // Determine the length of the property value.
800 process_gcj_properties ()
802 char *props
= getenv("GCJ_PROPERTIES");
805 size_t property_count
= 0;
810 // Whip through props quickly in order to count the number of
812 while (p
&& (p
= next_property_key (p
, &length
)))
814 // Skip to the end of the key
817 p
= next_property_value (p
, &length
);
824 // Allocate an array of property value/key pairs.
825 _Jv_Environment_Properties
=
826 (property_pair
*) malloc (sizeof(property_pair
)
827 * (property_count
+ 1));
829 // Go through the properties again, initializing _Jv_Properties
833 while (p
&& (p
= next_property_key (p
, &length
)))
835 _Jv_Environment_Properties
[property_count
].key
= p
;
836 _Jv_Environment_Properties
[property_count
].key_length
= length
;
838 // Skip to the end of the key
841 p
= next_property_value (p
, &length
);
843 _Jv_Environment_Properties
[property_count
].value
= p
;
844 _Jv_Environment_Properties
[property_count
].value_length
= length
;
851 memset ((void *) &_Jv_Environment_Properties
[property_count
],
852 0, sizeof (property_pair
));
856 // Null terminate the strings.
857 while (_Jv_Environment_Properties
[i
].key
)
859 _Jv_Environment_Properties
[i
].key
[_Jv_Environment_Properties
[i
].key_length
] = 0;
860 _Jv_Environment_Properties
[i
++].value
[_Jv_Environment_Properties
[i
].value_length
] = 0;
864 #endif // DISABLE_GETENV_PROPERTIES
868 _Jv_Utf8Const
*void_signature
;
869 _Jv_Utf8Const
*clinit_name
;
870 _Jv_Utf8Const
*init_name
;
871 _Jv_Utf8Const
*finit_name
;
873 bool runtimeInitialized
= false;
877 _Jv_CreateJavaVM (void* /*vm_args*/)
881 if (runtimeInitialized
)
884 runtimeInitialized
= true;
886 PROCESS_GCJ_PROPERTIES
;
890 _Jv_InitializeSyncMutex ();
892 /* Initialize Utf8 constants declared in jvm.h. */
893 void_signature
= _Jv_makeUtf8Const ("()V", 3);
894 clinit_name
= _Jv_makeUtf8Const ("<clinit>", 8);
895 init_name
= _Jv_makeUtf8Const ("<init>", 6);
896 finit_name
= _Jv_makeUtf8Const ("finit$", 6);
898 /* Initialize built-in classes to represent primitive TYPEs. */
899 _Jv_InitPrimClass (&_Jv_byteClass
, "byte", 'B', 1, &_Jv_byteVTable
);
900 _Jv_InitPrimClass (&_Jv_shortClass
, "short", 'S', 2, &_Jv_shortVTable
);
901 _Jv_InitPrimClass (&_Jv_intClass
, "int", 'I', 4, &_Jv_intVTable
);
902 _Jv_InitPrimClass (&_Jv_longClass
, "long", 'J', 8, &_Jv_longVTable
);
903 _Jv_InitPrimClass (&_Jv_booleanClass
, "boolean", 'Z', 1, &_Jv_booleanVTable
);
904 _Jv_InitPrimClass (&_Jv_charClass
, "char", 'C', 2, &_Jv_charVTable
);
905 _Jv_InitPrimClass (&_Jv_floatClass
, "float", 'F', 4, &_Jv_floatVTable
);
906 _Jv_InitPrimClass (&_Jv_doubleClass
, "double", 'D', 8, &_Jv_doubleVTable
);
907 _Jv_InitPrimClass (&_Jv_voidClass
, "void", 'V', 0, &_Jv_voidVTable
);
909 // Turn stack trace generation off while creating exception objects.
910 _Jv_InitClass (&java::lang::Throwable::class$
);
911 java::lang::Throwable::trace_enabled
= 0;
917 arithexception
= new java::lang::ArithmeticException
918 (JvNewStringLatin1 ("/ by zero"));
921 no_memory
= new java::lang::OutOfMemoryError
;
923 java::lang::Throwable::trace_enabled
= 1;
926 LTDL_SET_PRELOADED_SYMBOLS ();
930 // Initialise winsock for networking
932 if (WSAStartup (MAKEWORD (1, 1), &data
))
933 MessageBox (NULL
, "Error initialising winsock library.", "Error", MB_OK
| MB_ICONEXCLAMATION
);
934 #endif /* USE_WINSOCK */
936 #ifdef USE_WIN32_SIGNALLING
937 // Install exception handler
938 SetUnhandledExceptionFilter (win32_exception_handler
);
939 #elif defined(HAVE_SIGACTION)
940 // We only want this on POSIX systems.
941 struct sigaction act
;
942 act
.sa_handler
= SIG_IGN
;
943 sigemptyset (&act
.sa_mask
);
945 sigaction (SIGPIPE
, &act
, NULL
);
947 signal (SIGPIPE
, SIG_IGN
);
952 _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady
);
954 // Start the GC finalizer thread. A VirtualMachineError can be
955 // thrown by the runtime if, say, threads aren't available. In this
956 // case finalizers simply won't run.
959 using namespace gnu::gcj::runtime
;
960 FinalizerThread
*ft
= new FinalizerThread ();
963 catch (java::lang::VirtualMachineError
*ignore
)
971 _Jv_RunMain (jclass klass
, const char *name
, int argc
, const char **argv
,
977 java::lang::Runtime
*runtime
= NULL
;
979 #ifdef HAVE_PROC_SELF_EXE
981 sprintf (exec_name
, "/proc/%d/exe", getpid ());
982 _Jv_ThisExecutable (exec_name
);
984 _Jv_ThisExecutable (argv
[0]);
989 _Jv_CreateJavaVM (NULL
);
991 // Get the Runtime here. We want to initialize it before searching
992 // for `main'; that way it will be set up if `main' is a JNI method.
993 runtime
= java::lang::Runtime::getRuntime ();
995 arg_vec
= JvConvertArgv (argc
- 1, argv
+ 1);
998 main_thread
= new gnu::gcj::runtime::FirstThread (klass
, arg_vec
);
1000 main_thread
= new gnu::gcj::runtime::FirstThread
1001 (JvNewStringLatin1 (name
), arg_vec
, is_jar
);
1005 // We need a new ClassLoader because the classpath must be the
1006 // jar file only. The easiest way to do this is to lose our
1007 // reference to the previous classloader.
1008 _Jv_Jar_Class_Path
= strdup (name
);
1009 gnu::gcj::runtime::VMClassLoader::instance
= NULL
;
1012 catch (java::lang::Throwable
*t
)
1014 java::lang::System::err
->println (JvNewStringLatin1
1015 ("Exception during runtime initialization"));
1016 t
->printStackTrace();
1020 _Jv_AttachCurrentThread (main_thread
);
1021 _Jv_ThreadRun (main_thread
);
1024 int status
= (int) java::lang::ThreadGroup::had_uncaught_exception
;
1025 runtime
->exit (status
);
1029 JvRunMain (jclass klass
, int argc
, const char **argv
)
1031 _Jv_RunMain (klass
, NULL
, argc
, argv
, false);
1036 // Parse a string and return a heap size.
1038 parse_heap_size (const char *spec
)
1041 unsigned long val
= strtoul (spec
, &end
, 10);
1042 if (*end
== 'k' || *end
== 'K')
1044 else if (*end
== 'm' || *end
== 'M')
1046 return (size_t) val
;
1049 // Set the initial heap size. This might be ignored by the GC layer.
1050 // This must be called before _Jv_RunMain.
1052 _Jv_SetInitialHeapSize (const char *arg
)
1054 size_t size
= parse_heap_size (arg
);
1055 _Jv_GCSetInitialHeapSize (size
);
1058 // Set the maximum heap size. This might be ignored by the GC layer.
1059 // This must be called before _Jv_RunMain.
1061 _Jv_SetMaximumHeapSize (const char *arg
)
1063 size_t size
= parse_heap_size (arg
);
1064 _Jv_GCSetMaximumHeapSize (size
);
1070 _Jv_Malloc (jsize size
)
1072 if (__builtin_expect (size
== 0, false))
1074 void *ptr
= malloc ((size_t) size
);
1075 if (__builtin_expect (ptr
== NULL
, false))
1081 _Jv_Realloc (void *ptr
, jsize size
)
1083 if (__builtin_expect (size
== 0, false))
1085 ptr
= realloc (ptr
, (size_t) size
);
1086 if (__builtin_expect (ptr
== NULL
, false))
1092 _Jv_MallocUnchecked (jsize size
)
1094 if (__builtin_expect (size
== 0, false))
1096 return malloc ((size_t) size
);
1100 _Jv_Free (void* ptr
)
1107 // In theory, these routines can be #ifdef'd away on machines which
1108 // support divide overflow signals. However, we never know if some
1109 // code might have been compiled with "-fuse-divide-subroutine", so we
1110 // always include them in libgcj.
1113 _Jv_divI (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_remI (jint dividend
, jint divisor
)
1127 if (__builtin_expect (divisor
== 0, false))
1128 _Jv_ThrowSignal (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))
1140 _Jv_ThrowSignal (arithexception
);
1142 if (dividend
== (jlong
) 0x8000000000000000LL
&& divisor
== -1)
1145 return dividend
/ divisor
;
1149 _Jv_remJ (jlong dividend
, jlong divisor
)
1151 if (__builtin_expect (divisor
== 0, false))
1152 _Jv_ThrowSignal (arithexception
);
1154 if (dividend
== (jlong
) 0x8000000000000000LL
&& divisor
== -1)
1157 return dividend
% divisor
;