1 // prims.cc - Code for core of runtime environment.
3 /* Copyright (C) 1998, 1999, 2000 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>
41 #ifndef DISABLE_GETENV_PROPERTIES
43 #include <java-props.h>
44 #define PROCESS_GCJ_PROPERTIES process_gcj_properties()
46 #define PROCESS_GCJ_PROPERTIES
47 #endif // DISABLE_GETENV_PROPERTIES
49 #include <java/lang/Class.h>
50 #include <java/lang/ClassLoader.h>
51 #include <java/lang/Runtime.h>
52 #include <java/lang/String.h>
53 #include <java/lang/Thread.h>
54 #include <java/lang/ThreadGroup.h>
55 #include <gnu/gcj/runtime/FirstThread.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>
70 // We allocate a single OutOfMemoryError exception which we keep
71 // around for use if we run out of memory.
72 static java::lang::OutOfMemoryError
*no_memory
;
74 // Largest representable size_t.
75 #define SIZE_T_MAX ((size_t) (~ (size_t) 0))
77 // Properties set at compile time.
78 const char **_Jv_Compiler_Properties
;
80 // The JAR file to add to the beginning of java.class.path.
81 const char *_Jv_Jar_Class_Path
;
83 #ifndef DISABLE_GETENV_PROPERTIES
84 // Property key/value pairs.
85 property_pair
*_Jv_Environment_Properties
;
88 // The name of this executable.
89 static char * _Jv_execName
;
91 // Stash the argv pointer to benefit native libraries that need it.
92 const char **_Jv_argv
;
96 // Pointer to JVMPI notification functions.
97 void (*_Jv_JVMPI_Notify_OBJECT_ALLOC
) (JVMPI_Event
*event
);
98 void (*_Jv_JVMPI_Notify_THREAD_START
) (JVMPI_Event
*event
);
99 void (*_Jv_JVMPI_Notify_THREAD_END
) (JVMPI_Event
*event
);
103 extern "C" void _Jv_ThrowSignal (void *) __attribute ((noreturn
));
105 // Just like _Jv_Throw, but fill in the stack trace first. Although
106 // this is declared extern in order that its name not be mangled, it
107 // is not intended to be used outside this file.
109 _Jv_ThrowSignal (void *e
)
111 java::lang::Throwable
*throwable
= (java::lang::Throwable
*)e
;
112 throwable
->fillInStackTrace ();
113 _Jv_Throw (throwable
);
117 static java::lang::NullPointerException
*nullp
;
119 SIGNAL_HANDLER (catch_segv
)
121 MAKE_THROW_FRAME (nullp
);
122 _Jv_ThrowSignal (nullp
);
126 static java::lang::ArithmeticException
*arithexception
;
129 SIGNAL_HANDLER (catch_fpe
)
131 #ifdef HANDLE_DIVIDE_OVERFLOW
132 HANDLE_DIVIDE_OVERFLOW
;
134 MAKE_THROW_FRAME (arithexception
);
136 _Jv_ThrowSignal (arithexception
);
143 _Jv_equalUtf8Consts (Utf8Const
* a
, Utf8Const
*b
)
146 _Jv_ushort
*aptr
, *bptr
;
149 if (a
->hash
!= b
->hash
)
152 if (b
->length
!= len
)
154 aptr
= (_Jv_ushort
*)a
->data
;
155 bptr
= (_Jv_ushort
*)b
->data
;
156 len
= (len
+ 1) >> 1;
158 if (*aptr
++ != *bptr
++)
163 /* True iff A is equal to STR.
164 HASH is STR->hashCode().
168 _Jv_equal (Utf8Const
* a
, jstring str
, jint hash
)
170 if (a
->hash
!= (_Jv_ushort
) hash
)
172 jint len
= str
->length();
174 jchar
*sptr
= _Jv_GetStringChars (str
);
175 unsigned char* ptr
= (unsigned char*) a
->data
;
176 unsigned char* limit
= ptr
+ a
->length
;
179 int ch
= UTF8_GET (ptr
, limit
);
188 /* Like _Jv_equal, but stop after N characters. */
190 _Jv_equaln (Utf8Const
*a
, jstring str
, jint n
)
192 jint len
= str
->length();
194 jchar
*sptr
= _Jv_GetStringChars (str
);
195 unsigned char* ptr
= (unsigned char*) a
->data
;
196 unsigned char* limit
= ptr
+ a
->length
;
197 for (; n
-- > 0; i
++, sptr
++)
199 int ch
= UTF8_GET (ptr
, limit
);
208 /* Count the number of Unicode chars encoded in a given Ut8 string. */
210 _Jv_strLengthUtf8(char* str
, int len
)
213 unsigned char* limit
;
216 ptr
= (unsigned char*) str
;
219 for (; ptr
< limit
; str_length
++) {
220 if (UTF8_GET (ptr
, limit
) < 0) {
227 /* Calculate a hash value for a string encoded in Utf8 format.
228 * This returns the same hash value as specified or java.lang.String.hashCode.
231 hashUtf8String (char* str
, int len
)
233 unsigned char* ptr
= (unsigned char*) str
;
234 unsigned char* limit
= ptr
+ len
;
239 int ch
= UTF8_GET (ptr
, limit
);
240 /* Updated specification from
241 http://www.javasoft.com/docs/books/jls/clarify.html. */
242 hash
= (31 * hash
) + ch
;
248 _Jv_makeUtf8Const (char* s
, int len
)
252 Utf8Const
* m
= (Utf8Const
*) _Jv_AllocBytes (sizeof(Utf8Const
) + len
+ 1);
255 memcpy (m
->data
, s
, len
);
258 m
->hash
= hashUtf8String (s
, len
) & 0xFFFF;
263 _Jv_makeUtf8Const (jstring string
)
265 jint hash
= string
->hashCode ();
266 jint len
= _Jv_GetStringUTFLength (string
);
268 Utf8Const
* m
= (Utf8Const
*)
269 _Jv_AllocBytesChecked (sizeof(Utf8Const
) + len
+ 1);
274 _Jv_GetStringUTFRegion (string
, 0, string
->length (), m
->data
);
284 _Jv_Abort (const char *function
, const char *file
, int line
,
288 _Jv_Abort (const char *, const char *, int, const char *message
)
293 "libgcj failure: %s\n in function %s, file %s, line %d\n",
294 message
, function
, file
, line
);
296 java::io::PrintStream
*err
= java::lang::System::err
;
297 err
->print(JvNewStringLatin1 ("libgcj failure: "));
298 err
->println(JvNewStringLatin1 (message
));
305 fail_on_finalization (jobject
)
307 JvFail ("object was finalized");
311 _Jv_GCWatch (jobject obj
)
313 _Jv_RegisterFinalizer (obj
, fail_on_finalization
);
317 _Jv_ThrowBadArrayIndex(jint bad_index
)
319 JvThrow (new java::lang::ArrayIndexOutOfBoundsException
320 (java::lang::String::valueOf(bad_index
)));
324 _Jv_ThrowNullPointerException ()
326 throw new java::lang::NullPointerException ();
329 // Allocate some unscanned memory and throw an exception if no memory.
331 _Jv_AllocBytesChecked (jsize size
)
333 void *r
= _Jv_AllocBytes (size
);
335 _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
);
348 if (__builtin_expect (! obj
, false))
351 // If this class has inherited finalize from Object, then don't
352 // bother registering a finalizer. We know that finalize() is the
353 // very first method after the dummy entry. If this turns out to be
354 // unreliable, a more robust implementation can be written. Such an
355 // implementation would look for Object.finalize in Object's method
356 // table at startup, and then use that information to find the
357 // appropriate index in the method vector.
358 if (klass
->vtable
->get_finalizer()
359 != java::lang::Object::class$
.vtable
->get_finalizer())
360 _Jv_RegisterFinalizer (obj
, _Jv_FinalizeObject
);
363 // Service JVMPI request.
365 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC
!= 0, false))
369 event
.event_type
= JVMPI_EVENT_OBJECT_ALLOC
;
371 event
.u
.obj_alloc
.arena_id
= 0;
372 event
.u
.obj_alloc
.class_id
= (jobjectID
) klass
;
373 event
.u
.obj_alloc
.is_array
= 0;
374 event
.u
.obj_alloc
.size
= size
;
375 event
.u
.obj_alloc
.obj_id
= (jobjectID
) obj
;
378 (*_Jv_JVMPI_Notify_OBJECT_ALLOC
) (&event
);
386 // Allocate a new array of Java objects. Each object is of type
387 // `elementClass'. `init' is used to initialize each slot in the
390 _Jv_NewObjectArray (jsize count
, jclass elementClass
, jobject init
)
392 if (__builtin_expect (count
< 0, false))
393 JvThrow (new java::lang::NegativeArraySizeException
);
395 JvAssert (! elementClass
->isPrimitive ());
397 jobjectArray obj
= NULL
;
398 size_t size
= (size_t) _Jv_GetArrayElementFromElementType (obj
,
401 // Check for overflow.
402 if (__builtin_expect ((size_t) count
>
403 (SIZE_T_MAX
- size
) / sizeof (jobject
), false))
406 size
+= count
* sizeof (jobject
);
408 // FIXME: second argument should be "current loader" //
409 jclass klass
= _Jv_FindArrayClass (elementClass
, 0);
411 obj
= (jobjectArray
) _Jv_AllocArray (size
, klass
);
412 if (__builtin_expect (! obj
, false))
415 jobject
* ptr
= elements(obj
);
416 // We know the allocator returns zeroed memory. So don't bother
426 // Allocate a new array of primitives. ELTYPE is the type of the
427 // element, COUNT is the size of the array.
429 _Jv_NewPrimArray (jclass eltype
, jint count
)
431 int elsize
= eltype
->size();
432 if (__builtin_expect (count
< 0, false))
433 JvThrow (new java::lang::NegativeArraySizeException ());
435 JvAssert (eltype
->isPrimitive ());
436 jobject dummy
= NULL
;
437 size_t size
= (size_t) _Jv_GetArrayElementFromElementType (dummy
, eltype
);
439 // Check for overflow.
440 if (__builtin_expect ((size_t) count
>
441 (SIZE_T_MAX
- size
) / elsize
, false))
444 jclass klass
= _Jv_FindArrayClass (eltype
, 0);
446 __JArray
*arr
= (__JArray
*) _Jv_AllocObj (size
+ elsize
* count
, klass
);
447 if (__builtin_expect (! arr
, false))
450 // Note that we assume we are given zeroed memory by the allocator.
456 _Jv_NewArray (jint type
, jint size
)
460 case 4: return JvNewBooleanArray (size
);
461 case 5: return JvNewCharArray (size
);
462 case 6: return JvNewFloatArray (size
);
463 case 7: return JvNewDoubleArray (size
);
464 case 8: return JvNewByteArray (size
);
465 case 9: return JvNewShortArray (size
);
466 case 10: return JvNewIntArray (size
);
467 case 11: return JvNewLongArray (size
);
469 JvFail ("newarray - bad type code");
470 return NULL
; // Placate compiler.
474 _Jv_NewMultiArray (jclass type
, jint dimensions
, jint
*sizes
)
476 JvAssert (type
->isArray());
477 jclass element_type
= type
->getComponentType();
479 if (element_type
->isPrimitive())
480 result
= _Jv_NewPrimArray (element_type
, sizes
[0]);
482 result
= _Jv_NewObjectArray (sizes
[0], element_type
, NULL
);
486 JvAssert (! element_type
->isPrimitive());
487 JvAssert (element_type
->isArray());
488 jobject
*contents
= elements ((jobjectArray
) result
);
489 for (int i
= 0; i
< sizes
[0]; ++i
)
490 contents
[i
] = _Jv_NewMultiArray (element_type
, dimensions
- 1,
498 _Jv_NewMultiArray (jclass array_type
, jint dimensions
, ...)
501 jint sizes
[dimensions
];
502 va_start (args
, dimensions
);
503 for (int i
= 0; i
< dimensions
; ++i
)
505 jint size
= va_arg (args
, jint
);
510 return _Jv_NewMultiArray (array_type
, dimensions
, sizes
);
515 class _Jv_PrimClass
: public java::lang::Class
518 // FIXME: calling convention is weird. If we use the natural types
519 // then the compiler will complain because they aren't Java types.
520 _Jv_PrimClass (jobject cname
, jbyte sig
, jint len
, jobject array_vtable
)
522 using namespace java::lang::reflect
;
524 // We must initialize every field of the class. We do this in
525 // the same order they are declared in Class.h.
527 name
= _Jv_makeUtf8Const ((char *) cname
, -1);
528 accflags
= Modifier::PUBLIC
| Modifier::FINAL
;
531 constants
.tags
= NULL
;
532 constants
.data
= NULL
;
535 vtable_method_count
= 0;
539 static_field_count
= 0;
540 vtable
= JV_PRIMITIVE_VTABLE
;
544 state
= JV_STATE_DONE
;
547 // Note that we have to set `methods' to NULL.
549 _Jv_FindArrayClass (this, NULL
, (_Jv_VTable
*) array_vtable
);
553 // We use this to define both primitive classes and the vtables for
554 // arrays of primitive classes. The latter are given names so that we
555 // can refer to them from the compiler, allowing us to construct
556 // arrays of primitives statically.
557 #define DECLARE_PRIM_TYPE(NAME, SIG, LEN) \
558 _Jv_ArrayVTable _Jv_##NAME##VTable; \
559 _Jv_PrimClass _Jv_##NAME##Class((jobject) #NAME, (jbyte) SIG, (jint) LEN, \
560 (jobject) &_Jv_##NAME##VTable)
562 DECLARE_PRIM_TYPE(byte
, 'B', 1);
563 DECLARE_PRIM_TYPE(short, 'S', 2);
564 DECLARE_PRIM_TYPE(int, 'I', 4);
565 DECLARE_PRIM_TYPE(long, 'J', 8);
566 DECLARE_PRIM_TYPE(boolean
, 'Z', 1);
567 DECLARE_PRIM_TYPE(char, 'C', 2);
568 DECLARE_PRIM_TYPE(float, 'F', 4);
569 DECLARE_PRIM_TYPE(double, 'D', 8);
570 DECLARE_PRIM_TYPE(void, 'V', 0);
573 _Jv_FindClassFromSignature (char *sig
, java::lang::ClassLoader
*loader
)
578 return JvPrimClass (byte
);
580 return JvPrimClass (short);
582 return JvPrimClass (int);
584 return JvPrimClass (long);
586 return JvPrimClass (boolean
);
588 return JvPrimClass (char);
590 return JvPrimClass (float);
592 return JvPrimClass (double);
594 return JvPrimClass (void);
598 for (i
= 1; sig
[i
] && sig
[i
] != ';'; ++i
)
600 _Jv_Utf8Const
*name
= _Jv_makeUtf8Const (&sig
[1], i
- 1);
601 return _Jv_FindClass (name
, loader
);
605 return _Jv_FindArrayClass (_Jv_FindClassFromSignature (&sig
[1], loader
),
608 JvFail ("couldn't understand class signature");
609 return NULL
; // Placate compiler.
615 JvConvertArgv (int argc
, const char **argv
)
619 jobjectArray ar
= JvNewObjectArray(argc
, &StringClass
, NULL
);
620 jobject
* ptr
= elements(ar
);
621 for (int i
= 0; i
< argc
; i
++)
623 const char *arg
= argv
[i
];
624 // FIXME - should probably use JvNewStringUTF.
625 *ptr
++ = JvNewStringLatin1(arg
, strlen(arg
));
627 return (JArray
<jstring
>*) ar
;
630 // FIXME: These variables are static so that they will be
631 // automatically scanned by the Boehm collector. This is needed
632 // because with qthreads the collector won't scan the initial stack --
633 // it will only scan the qthreads stacks.
635 // Command line arguments.
636 static jobject arg_vec
;
638 // The primary thread.
639 static java::lang::Thread
*main_thread
;
642 _Jv_ThisExecutable (void)
648 _Jv_ThisExecutable (const char *name
)
652 _Jv_execName
= new char[strlen (name
) + 1];
653 strcpy (_Jv_execName
, name
);
657 #ifdef USE_WIN32_SIGNALLING
659 extern "C" int* win32_get_restart_frame (void *);
662 win32_exception_handler (LPEXCEPTION_POINTERS e
)
665 if (e
->ExceptionRecord
->ExceptionCode
== EXCEPTION_ACCESS_VIOLATION
)
666 setjmp_buf
= win32_get_restart_frame (nullp
);
667 else if (e
->ExceptionRecord
->ExceptionCode
== EXCEPTION_INT_DIVIDE_BY_ZERO
)
668 setjmp_buf
= win32_get_restart_frame (arithexception
);
670 return EXCEPTION_CONTINUE_SEARCH
;
672 e
->ContextRecord
->Ebp
= setjmp_buf
[0];
673 // FIXME: Why does i386-signal.h increment the PC here, do we need to do it?
674 e
->ContextRecord
->Eip
= setjmp_buf
[1];
675 // FIXME: Is this the stack pointer? Do we need it?
676 e
->ContextRecord
->Esp
= setjmp_buf
[2];
678 return EXCEPTION_CONTINUE_EXECUTION
;
690 arithexception
= new java::lang::ArithmeticException
691 (JvNewStringLatin1 ("/ by zero"));
694 no_memory
= new java::lang::OutOfMemoryError
;
697 LTDL_SET_PRELOADED_SYMBOLS ();
701 // Initialise winsock for networking
703 if (WSAStartup (MAKEWORD (1, 1), &data
))
704 MessageBox (NULL
, "Error initialising winsock library.", "Error", MB_OK
| MB_ICONEXCLAMATION
);
705 #endif /* USE_WINSOCK */
707 #ifdef USE_WIN32_SIGNALLING
708 // Install exception handler
709 SetUnhandledExceptionFilter (win32_exception_handler
);
711 // We only want this on POSIX systems.
712 struct sigaction act
;
713 act
.sa_handler
= SIG_IGN
;
714 sigemptyset (&act
.sa_mask
);
716 sigaction (SIGPIPE
, &act
, NULL
);
717 #endif /* USE_WIN32_SIGNALLING */
722 #ifndef DISABLE_GETENV_PROPERTIES
725 next_property_key (char *s
, size_t *length
)
731 // Skip over whitespace
735 // If we've reached the end, return NULL. Also return NULL if for
736 // some reason we've come across a malformed property string.
742 // Determine the length of the property key.
760 next_property_value (char *s
, size_t *length
)
776 // If we've reached the end, return NULL.
780 // Determine the length of the property value.
799 process_gcj_properties ()
801 char *props
= getenv("GCJ_PROPERTIES");
804 size_t property_count
= 0;
809 // Whip through props quickly in order to count the number of
811 while (p
&& (p
= next_property_key (p
, &length
)))
813 // Skip to the end of the key
816 p
= next_property_value (p
, &length
);
823 // Allocate an array of property value/key pairs.
824 _Jv_Environment_Properties
=
825 (property_pair
*) malloc (sizeof(property_pair
)
826 * (property_count
+ 1));
828 // Go through the properties again, initializing _Jv_Properties
832 while (p
&& (p
= next_property_key (p
, &length
)))
834 _Jv_Environment_Properties
[property_count
].key
= p
;
835 _Jv_Environment_Properties
[property_count
].key_length
= length
;
837 // Skip to the end of the key
840 p
= next_property_value (p
, &length
);
842 _Jv_Environment_Properties
[property_count
].value
= p
;
843 _Jv_Environment_Properties
[property_count
].value_length
= length
;
850 memset ((void *) &_Jv_Environment_Properties
[property_count
],
851 0, sizeof (property_pair
));
855 // Null terminate the strings.
856 while (_Jv_Environment_Properties
[i
].key
)
858 _Jv_Environment_Properties
[i
].key
[_Jv_Environment_Properties
[i
].key_length
] = 0;
859 _Jv_Environment_Properties
[i
++].value
[_Jv_Environment_Properties
[i
].value_length
] = 0;
863 #endif // DISABLE_GETENV_PROPERTIES
866 JvRunMain (jclass klass
, int argc
, const char **argv
)
868 PROCESS_GCJ_PROPERTIES
;
874 #ifdef HAVE_PROC_SELF_EXE
876 sprintf (exec_name
, "/proc/%d/exe", getpid ());
877 _Jv_ThisExecutable (exec_name
);
879 _Jv_ThisExecutable (argv
[0]);
882 arg_vec
= JvConvertArgv (argc
- 1, argv
+ 1);
883 main_thread
= new gnu::gcj::runtime::FirstThread (klass
, arg_vec
);
885 main_thread
->start();
888 int status
= (int) java::lang::ThreadGroup::had_uncaught_exception
;
890 java::lang::Runtime::getRuntime ()->exit (status
);
894 _Jv_RunMain (const char *name
, int argc
, const char **argv
, bool is_jar
)
897 PROCESS_GCJ_PROPERTIES
;
901 #ifdef HAVE_PROC_SELF_EXE
903 sprintf (exec_name
, "/proc/%d/exe", getpid ());
904 _Jv_ThisExecutable (exec_name
);
909 // name specifies a jar file. We must now extract the
910 // Main-Class attribute from the jar's manifest file. This is
911 // done by gnu.gcj.runtime.FirstThread.main.
912 _Jv_Jar_Class_Path
= strdup (name
);
913 arg_vec
= JvConvertArgv (1, &_Jv_Jar_Class_Path
);
916 new gnu::gcj::runtime::FirstThread (&gnu::gcj::runtime::FirstThread::class$
,
918 main_thread
->start();
921 // FirstThread.main extracts the main class name and stores it
923 class_name
= gnu::gcj::runtime::FirstThread::jarMainClassName
;
925 // We need a new ClassLoader because the classpath must be the
926 // jar file only. The easiest way to do this is to lose our
927 // reference to the previous classloader.
928 java::lang::ClassLoader::system
= NULL
;
931 class_name
= JvNewStringLatin1 (name
);
933 arg_vec
= JvConvertArgv (argc
- 1, argv
+ 1);
937 main_thread
= new gnu::gcj::runtime::FirstThread (class_name
, arg_vec
);
938 main_thread
->start();
942 int status
= (int) java::lang::ThreadGroup::had_uncaught_exception
;
944 java::lang::Runtime::getRuntime ()->exit (status
);
949 // Parse a string and return a heap size.
951 parse_heap_size (const char *spec
)
954 unsigned long val
= strtoul (spec
, &end
, 10);
955 if (*end
== 'k' || *end
== 'K')
957 else if (*end
== 'm' || *end
== 'M')
962 // Set the initial heap size. This might be ignored by the GC layer.
963 // This must be called before _Jv_RunMain.
965 _Jv_SetInitialHeapSize (const char *arg
)
967 size_t size
= parse_heap_size (arg
);
968 _Jv_GCSetInitialHeapSize (size
);
971 // Set the maximum heap size. This might be ignored by the GC layer.
972 // This must be called before _Jv_RunMain.
974 _Jv_SetMaximumHeapSize (const char *arg
)
976 size_t size
= parse_heap_size (arg
);
977 _Jv_GCSetMaximumHeapSize (size
);
983 _Jv_Malloc (jsize size
)
985 if (__builtin_expect (size
== 0, false))
987 void *ptr
= malloc ((size_t) size
);
988 if (__builtin_expect (ptr
== NULL
, false))
994 _Jv_Realloc (void *ptr
, jsize size
)
996 if (__builtin_expect (size
== 0, false))
998 ptr
= realloc (ptr
, (size_t) size
);
999 if (__builtin_expect (ptr
== NULL
, false))
1000 JvThrow (no_memory
);
1005 _Jv_MallocUnchecked (jsize size
)
1007 if (__builtin_expect (size
== 0, false))
1009 return malloc ((size_t) size
);
1013 _Jv_Free (void* ptr
)
1020 // In theory, these routines can be #ifdef'd away on machines which
1021 // support divide overflow signals. However, we never know if some
1022 // code might have been compiled with "-fuse-divide-subroutine", so we
1023 // always include them in libgcj.
1026 _Jv_divI (jint dividend
, jint divisor
)
1028 if (__builtin_expect (divisor
== 0, false))
1029 _Jv_ThrowSignal (arithexception
);
1031 if (dividend
== (jint
) 0x80000000L
&& divisor
== -1)
1034 return dividend
/ divisor
;
1038 _Jv_remI (jint dividend
, jint divisor
)
1040 if (__builtin_expect (divisor
== 0, false))
1041 _Jv_ThrowSignal (arithexception
);
1043 if (dividend
== (jint
) 0x80000000L
&& divisor
== -1)
1046 return dividend
% divisor
;
1050 _Jv_divJ (jlong dividend
, jlong divisor
)
1052 if (__builtin_expect (divisor
== 0, false))
1053 _Jv_ThrowSignal (arithexception
);
1055 if (dividend
== (jlong
) 0x8000000000000000LL
&& divisor
== -1)
1058 return dividend
/ divisor
;
1062 _Jv_remJ (jlong dividend
, jlong divisor
)
1064 if (__builtin_expect (divisor
== 0, false))
1065 _Jv_ThrowSignal (arithexception
);
1067 if (dividend
== (jlong
) 0x8000000000000000LL
&& divisor
== -1)
1070 return dividend
% divisor
;