1 // prims.cc - Code for core of runtime environment.
3 /* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 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>
28 #include <java-interp.h>
32 #include <java/lang/ThreadGroup.h>
35 #ifndef DISABLE_GETENV_PROPERTIES
37 #include <java-props.h>
38 #define PROCESS_GCJ_PROPERTIES process_gcj_properties()
40 #define PROCESS_GCJ_PROPERTIES
41 #endif // DISABLE_GETENV_PROPERTIES
43 #include <java/lang/Class.h>
44 #include <java/lang/ClassLoader.h>
45 #include <java/lang/Runtime.h>
46 #include <java/lang/String.h>
47 #include <java/lang/Thread.h>
48 #include <java/lang/ThreadGroup.h>
49 #include <java/lang/ArrayIndexOutOfBoundsException.h>
50 #include <java/lang/ArithmeticException.h>
51 #include <java/lang/ClassFormatError.h>
52 #include <java/lang/InternalError.h>
53 #include <java/lang/NegativeArraySizeException.h>
54 #include <java/lang/NullPointerException.h>
55 #include <java/lang/OutOfMemoryError.h>
56 #include <java/lang/System.h>
57 #include <java/lang/VMThrowable.h>
58 #include <java/lang/VMClassLoader.h>
59 #include <java/lang/reflect/Modifier.h>
60 #include <java/io/PrintStream.h>
61 #include <java/lang/UnsatisfiedLinkError.h>
62 #include <java/lang/VirtualMachineError.h>
63 #include <gnu/gcj/runtime/ExtensionClassLoader.h>
64 #include <gnu/gcj/runtime/FinalizerThread.h>
65 #include <execution.h>
66 #include <gnu/java/lang/MainThread.h>
72 // Execution engine for compiled code.
73 _Jv_CompiledEngine _Jv_soleCompiledEngine
;
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 // Number of bytes in largest array object we create. This could be
80 // increased to the largest size_t value, so long as the appropriate
81 // functions are changed to take a size_t argument instead of jint.
82 #define MAX_OBJECT_SIZE ((1<<31) - 1)
84 // Properties set at compile time.
85 const char **_Jv_Compiler_Properties
= NULL
;
86 int _Jv_Properties_Count
= 0;
88 #ifndef DISABLE_GETENV_PROPERTIES
89 // Property key/value pairs.
90 property_pair
*_Jv_Environment_Properties
;
93 // Stash the argv pointer to benefit native libraries that need it.
94 const char **_Jv_argv
;
101 // _Jv_argc is 0 if not explicitly initialized.
106 _Jv_GetSafeArg (int index
)
108 if (index
>=0 && index
< _Jv_GetNbArgs ())
109 return _Jv_argv
[index
];
115 _Jv_SetArgs (int argc
, const char **argv
)
122 // Pointer to JVMPI notification functions.
123 void (*_Jv_JVMPI_Notify_OBJECT_ALLOC
) (JVMPI_Event
*event
);
124 void (*_Jv_JVMPI_Notify_THREAD_START
) (JVMPI_Event
*event
);
125 void (*_Jv_JVMPI_Notify_THREAD_END
) (JVMPI_Event
*event
);
129 #if defined (HANDLE_SEGV) || defined(HANDLE_FPE)
130 /* Unblock a signal. Unless we do this, the signal may only be sent
133 unblock_signal (int signum
__attribute__ ((__unused__
)))
135 #ifdef _POSIX_VERSION
139 sigaddset (&sigs
, signum
);
140 sigprocmask (SIG_UNBLOCK
, &sigs
, NULL
);
146 SIGNAL_HANDLER (catch_segv
)
148 unblock_signal (SIGSEGV
);
149 MAKE_THROW_FRAME (nullp
);
150 java::lang::NullPointerException
*nullp
151 = new java::lang::NullPointerException
;
157 SIGNAL_HANDLER (catch_fpe
)
159 unblock_signal (SIGFPE
);
160 #ifdef HANDLE_DIVIDE_OVERFLOW
161 HANDLE_DIVIDE_OVERFLOW
;
163 MAKE_THROW_FRAME (arithexception
);
165 java::lang::ArithmeticException
*arithexception
166 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
167 throw arithexception
;
174 _Jv_equalUtf8Consts (const Utf8Const
* a
, const Utf8Const
*b
)
177 const _Jv_ushort
*aptr
, *bptr
;
180 if (a
->hash
!= b
->hash
)
183 if (b
->length
!= len
)
185 aptr
= (const _Jv_ushort
*)a
->data
;
186 bptr
= (const _Jv_ushort
*)b
->data
;
187 len
= (len
+ 1) >> 1;
189 if (*aptr
++ != *bptr
++)
194 /* True iff A is equal to STR.
195 HASH is STR->hashCode().
199 _Jv_equal (Utf8Const
* a
, jstring str
, jint hash
)
201 if (a
->hash
!= (_Jv_ushort
) hash
)
203 jint len
= str
->length();
205 jchar
*sptr
= _Jv_GetStringChars (str
);
206 unsigned char* ptr
= (unsigned char*) a
->data
;
207 unsigned char* limit
= ptr
+ a
->length
;
210 int ch
= UTF8_GET (ptr
, limit
);
219 /* Like _Jv_equal, but stop after N characters. */
221 _Jv_equaln (Utf8Const
*a
, jstring str
, jint n
)
223 jint len
= str
->length();
225 jchar
*sptr
= _Jv_GetStringChars (str
);
226 unsigned char* ptr
= (unsigned char*) a
->data
;
227 unsigned char* limit
= ptr
+ a
->length
;
228 for (; n
-- > 0; i
++, sptr
++)
230 int ch
= UTF8_GET (ptr
, limit
);
239 /* Count the number of Unicode chars encoded in a given Ut8 string. */
241 _Jv_strLengthUtf8(char* str
, int len
)
244 unsigned char* limit
;
247 ptr
= (unsigned char*) str
;
250 for (; ptr
< limit
; str_length
++)
252 if (UTF8_GET (ptr
, limit
) < 0)
258 /* Calculate a hash value for a string encoded in Utf8 format.
259 * This returns the same hash value as specified or java.lang.String.hashCode.
262 _Jv_hashUtf8String (char* str
, int len
)
264 unsigned char* ptr
= (unsigned char*) str
;
265 unsigned char* limit
= ptr
+ len
;
270 int ch
= UTF8_GET (ptr
, limit
);
271 /* Updated specification from
272 http://www.javasoft.com/docs/books/jls/clarify.html. */
273 hash
= (31 * hash
) + ch
;
279 _Jv_Utf8Const::init(char *s
, int len
)
281 ::memcpy (data
, s
, len
);
284 hash
= _Jv_hashUtf8String (s
, len
) & 0xFFFF;
288 _Jv_makeUtf8Const (char* s
, int len
)
293 = (Utf8Const
*) _Jv_AllocBytes (_Jv_Utf8Const::space_needed(s
, len
));
299 _Jv_makeUtf8Const (jstring string
)
301 jint hash
= string
->hashCode ();
302 jint len
= _Jv_GetStringUTFLength (string
);
304 Utf8Const
* m
= (Utf8Const
*)
305 _Jv_AllocBytes (sizeof(Utf8Const
) + len
+ 1);
310 _Jv_GetStringUTFRegion (string
, 0, string
->length (), m
->data
);
320 _Jv_Abort (const char *function
, const char *file
, int line
,
324 _Jv_Abort (const char *, const char *, int, const char *message
)
329 "libgcj failure: %s\n in function %s, file %s, line %d\n",
330 message
, function
, file
, line
);
332 fprintf (stderr
, "libgcj failure: %s\n", message
);
338 fail_on_finalization (jobject
)
340 JvFail ("object was finalized");
344 _Jv_GCWatch (jobject obj
)
346 _Jv_RegisterFinalizer (obj
, fail_on_finalization
);
350 _Jv_ThrowBadArrayIndex(jint bad_index
)
352 throw new java::lang::ArrayIndexOutOfBoundsException
353 (java::lang::String::valueOf (bad_index
));
357 _Jv_ThrowNullPointerException ()
359 throw new java::lang::NullPointerException
;
362 // Explicitly throw a no memory exception.
363 // The collector calls this when it encounters an out-of-memory condition.
364 void _Jv_ThrowNoMemory()
370 # define JVMPI_NOTIFY_ALLOC(klass,size,obj) \
371 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false)) \
372 jvmpi_notify_alloc(klass,size,obj);
374 jvmpi_notify_alloc(jclass klass
, jint size
, jobject obj
)
376 // Service JVMPI allocation request.
379 event
.event_type
= JVMPI_EVENT_OBJECT_ALLOC
;
381 event
.u
.obj_alloc
.arena_id
= 0;
382 event
.u
.obj_alloc
.class_id
= (jobjectID
) klass
;
383 event
.u
.obj_alloc
.is_array
= 0;
384 event
.u
.obj_alloc
.size
= size
;
385 event
.u
.obj_alloc
.obj_id
= (jobjectID
) obj
;
387 // FIXME: This doesn't look right for the Boehm GC. A GC may
388 // already be in progress. _Jv_DisableGC () doesn't wait for it.
389 // More importantly, I don't see the need for disabling GC, since we
390 // blatantly have a pointer to obj on our stack, ensuring that the
391 // object can't be collected. Even for a nonconservative collector,
392 // it appears to me that this must be true, since we are about to
393 // return obj. Isn't this whole approach way too intrusive for
394 // a useful profiling interface? - HB
396 (*_Jv_JVMPI_Notify_OBJECT_ALLOC
) (&event
);
399 #else /* !ENABLE_JVMPI */
400 # define JVMPI_NOTIFY_ALLOC(klass,size,obj) /* do nothing */
403 // Allocate a new object of class KLASS.
404 // First a version that assumes that we have no finalizer, and that
405 // the class is already initialized.
406 // If we know that JVMPI is disabled, this can be replaced by a direct call
407 // to the allocator for the appropriate GC.
409 _Jv_AllocObjectNoInitNoFinalizer (jclass klass
)
411 jint size
= klass
->size ();
412 jobject obj
= (jobject
) _Jv_AllocObj (size
, klass
);
413 JVMPI_NOTIFY_ALLOC (klass
, size
, obj
);
417 // And now a version that initializes if necessary.
419 _Jv_AllocObjectNoFinalizer (jclass klass
)
421 _Jv_InitClass (klass
);
422 jint size
= klass
->size ();
423 jobject obj
= (jobject
) _Jv_AllocObj (size
, klass
);
424 JVMPI_NOTIFY_ALLOC (klass
, size
, obj
);
428 // And now the general version that registers a finalizer if necessary.
430 _Jv_AllocObject (jclass klass
)
432 jobject obj
= _Jv_AllocObjectNoFinalizer (klass
);
434 // We assume that the compiler only generates calls to this routine
435 // if there really is an interesting finalizer.
436 // Unfortunately, we still have to the dynamic test, since there may
437 // be cni calls to this routine.
438 // Note that on IA64 get_finalizer() returns the starting address of the
439 // function, not a function pointer. Thus this still works.
440 if (klass
->vtable
->get_finalizer ()
441 != java::lang::Object::class$
.vtable
->get_finalizer ())
442 _Jv_RegisterFinalizer (obj
, _Jv_FinalizeObject
);
446 // Allocate a String, including variable length storage.
448 _Jv_AllocString(jsize len
)
450 using namespace java::lang
;
452 jsize sz
= sizeof(java::lang::String
) + len
* sizeof(jchar
);
454 // We assert that for strings allocated this way, the data field
455 // will always point to the object itself. Thus there is no reason
456 // for the garbage collector to scan any of it.
457 // Furthermore, we're about to overwrite the string data, so
458 // initialization of the object is not an issue.
460 // String needs no initialization, and there is no finalizer, so
461 // we can go directly to the collector's allocator interface.
462 jstring obj
= (jstring
) _Jv_AllocPtrFreeObj(sz
, &String::class$
);
465 obj
->boffset
= sizeof(java::lang::String
);
467 obj
->cachedHashCode
= 0;
469 JVMPI_NOTIFY_ALLOC (&String::class$
, sz
, obj
);
474 // A version of the above that assumes the object contains no pointers,
475 // and requires no finalization. This can't happen if we need pointers
477 #ifdef JV_HASH_SYNCHRONIZATION
479 _Jv_AllocPtrFreeObject (jclass klass
)
481 _Jv_InitClass (klass
);
482 jint size
= klass
->size ();
484 jobject obj
= (jobject
) _Jv_AllocPtrFreeObj (size
, klass
);
486 JVMPI_NOTIFY_ALLOC (klass
, size
, obj
);
490 #endif /* JV_HASH_SYNCHRONIZATION */
493 // Allocate a new array of Java objects. Each object is of type
494 // `elementClass'. `init' is used to initialize each slot in the
497 _Jv_NewObjectArray (jsize count
, jclass elementClass
, jobject init
)
499 if (__builtin_expect (count
< 0, false))
500 throw new java::lang::NegativeArraySizeException
;
502 JvAssert (! elementClass
->isPrimitive ());
504 // Ensure that elements pointer is properly aligned.
505 jobjectArray obj
= NULL
;
506 size_t size
= (size_t) elements (obj
);
507 // Check for overflow.
508 if (__builtin_expect ((size_t) count
>
509 (MAX_OBJECT_SIZE
- 1 - size
) / sizeof (jobject
), false))
512 size
+= count
* sizeof (jobject
);
514 jclass klass
= _Jv_GetArrayClass (elementClass
,
515 elementClass
->getClassLoaderInternal());
517 obj
= (jobjectArray
) _Jv_AllocArray (size
, klass
);
519 jsize
*lp
= const_cast<jsize
*> (&obj
->length
);
521 // We know the allocator returns zeroed memory. So don't bother
525 jobject
*ptr
= elements(obj
);
532 // Allocate a new array of primitives. ELTYPE is the type of the
533 // element, COUNT is the size of the array.
535 _Jv_NewPrimArray (jclass eltype
, jint count
)
537 int elsize
= eltype
->size();
538 if (__builtin_expect (count
< 0, false))
539 throw new java::lang::NegativeArraySizeException
;
541 JvAssert (eltype
->isPrimitive ());
542 jobject dummy
= NULL
;
543 size_t size
= (size_t) _Jv_GetArrayElementFromElementType (dummy
, eltype
);
545 // Check for overflow.
546 if (__builtin_expect ((size_t) count
>
547 (MAX_OBJECT_SIZE
- size
) / elsize
, false))
550 jclass klass
= _Jv_GetArrayClass (eltype
, 0);
552 # ifdef JV_HASH_SYNCHRONIZATION
553 // Since the vtable is always statically allocated,
554 // these are completely pointerfree! Make sure the GC doesn't touch them.
556 (__JArray
*) _Jv_AllocPtrFreeObj (size
+ elsize
* count
, klass
);
557 memset((char *)arr
+ size
, 0, elsize
* count
);
559 __JArray
*arr
= (__JArray
*) _Jv_AllocObj (size
+ elsize
* count
, klass
);
560 // Note that we assume we are given zeroed memory by the allocator.
563 jsize
*lp
= const_cast<jsize
*> (&arr
->length
);
570 _Jv_NewArray (jint type
, jint size
)
574 case 4: return JvNewBooleanArray (size
);
575 case 5: return JvNewCharArray (size
);
576 case 6: return JvNewFloatArray (size
);
577 case 7: return JvNewDoubleArray (size
);
578 case 8: return JvNewByteArray (size
);
579 case 9: return JvNewShortArray (size
);
580 case 10: return JvNewIntArray (size
);
581 case 11: return JvNewLongArray (size
);
583 throw new java::lang::InternalError
584 (JvNewStringLatin1 ("invalid type code in _Jv_NewArray"));
587 // Allocate a possibly multi-dimensional array but don't check that
588 // any array length is <0.
590 _Jv_NewMultiArrayUnchecked (jclass type
, jint dimensions
, jint
*sizes
)
592 JvAssert (type
->isArray());
593 jclass element_type
= type
->getComponentType();
595 if (element_type
->isPrimitive())
596 result
= _Jv_NewPrimArray (element_type
, sizes
[0]);
598 result
= _Jv_NewObjectArray (sizes
[0], element_type
, NULL
);
602 JvAssert (! element_type
->isPrimitive());
603 JvAssert (element_type
->isArray());
604 jobject
*contents
= elements ((jobjectArray
) result
);
605 for (int i
= 0; i
< sizes
[0]; ++i
)
606 contents
[i
] = _Jv_NewMultiArrayUnchecked (element_type
, dimensions
- 1,
614 _Jv_NewMultiArray (jclass type
, jint dimensions
, jint
*sizes
)
616 for (int i
= 0; i
< dimensions
; ++i
)
618 throw new java::lang::NegativeArraySizeException
;
620 return _Jv_NewMultiArrayUnchecked (type
, dimensions
, sizes
);
624 _Jv_NewMultiArray (jclass array_type
, jint dimensions
, ...)
627 jint sizes
[dimensions
];
628 va_start (args
, dimensions
);
629 for (int i
= 0; i
< dimensions
; ++i
)
631 jint size
= va_arg (args
, jint
);
633 throw new java::lang::NegativeArraySizeException
;
638 return _Jv_NewMultiArrayUnchecked (array_type
, dimensions
, sizes
);
643 // Ensure 8-byte alignment, for hash synchronization.
644 #define DECLARE_PRIM_TYPE(NAME) \
645 java::lang::Class _Jv_##NAME##Class __attribute__ ((aligned (8)));
647 DECLARE_PRIM_TYPE(byte
)
648 DECLARE_PRIM_TYPE(short)
649 DECLARE_PRIM_TYPE(int)
650 DECLARE_PRIM_TYPE(long)
651 DECLARE_PRIM_TYPE(boolean
)
652 DECLARE_PRIM_TYPE(char)
653 DECLARE_PRIM_TYPE(float)
654 DECLARE_PRIM_TYPE(double)
655 DECLARE_PRIM_TYPE(void)
658 _Jv_InitPrimClass (jclass cl
, char *cname
, char sig
, int len
)
660 using namespace java::lang::reflect
;
662 // We must set the vtable for the class; the Java constructor
664 (*(_Jv_VTable
**) cl
) = java::lang::Class::class$
.vtable
;
666 // Initialize the fields we care about. We do this in the same
667 // order they are declared in Class.h.
668 cl
->name
= _Jv_makeUtf8Const ((char *) cname
, -1);
669 cl
->accflags
= Modifier::PUBLIC
| Modifier::FINAL
| Modifier::ABSTRACT
;
670 cl
->method_count
= sig
;
671 cl
->size_in_bytes
= len
;
672 cl
->vtable
= JV_PRIMITIVE_VTABLE
;
673 cl
->state
= JV_STATE_DONE
;
678 _Jv_FindClassFromSignature (char *sig
, java::lang::ClassLoader
*loader
)
683 return JvPrimClass (byte
);
685 return JvPrimClass (short);
687 return JvPrimClass (int);
689 return JvPrimClass (long);
691 return JvPrimClass (boolean
);
693 return JvPrimClass (char);
695 return JvPrimClass (float);
697 return JvPrimClass (double);
699 return JvPrimClass (void);
703 for (i
= 1; sig
[i
] && sig
[i
] != ';'; ++i
)
705 _Jv_Utf8Const
*name
= _Jv_makeUtf8Const (&sig
[1], i
- 1);
706 return _Jv_FindClass (name
, loader
);
710 jclass klass
= _Jv_FindClassFromSignature (&sig
[1], loader
);
713 return _Jv_GetArrayClass (klass
, loader
);
717 return NULL
; // Placate compiler.
723 JvConvertArgv (int argc
, const char **argv
)
727 jobjectArray ar
= JvNewObjectArray(argc
, &java::lang::String::class$
, NULL
);
728 jobject
*ptr
= elements(ar
);
729 jbyteArray bytes
= NULL
;
730 for (int i
= 0; i
< argc
; i
++)
732 const char *arg
= argv
[i
];
733 int len
= strlen (arg
);
734 if (bytes
== NULL
|| bytes
->length
< len
)
735 bytes
= JvNewByteArray (len
);
736 jbyte
*bytePtr
= elements (bytes
);
737 // We assume jbyte == char.
738 memcpy (bytePtr
, arg
, len
);
740 // Now convert using the default encoding.
741 *ptr
++ = new java::lang::String (bytes
, 0, len
);
743 return (JArray
<jstring
>*) ar
;
746 // FIXME: These variables are static so that they will be
747 // automatically scanned by the Boehm collector. This is needed
748 // because with qthreads the collector won't scan the initial stack --
749 // it will only scan the qthreads stacks.
751 // Command line arguments.
752 static JArray
<jstring
> *arg_vec
;
754 // The primary thread.
755 static java::lang::Thread
*main_thread
;
757 #ifndef DISABLE_GETENV_PROPERTIES
760 next_property_key (char *s
, size_t *length
)
766 // Skip over whitespace
770 // If we've reached the end, return NULL. Also return NULL if for
771 // some reason we've come across a malformed property string.
777 // Determine the length of the property key.
795 next_property_value (char *s
, size_t *length
)
811 // If we've reached the end, return NULL.
815 // Determine the length of the property value.
834 process_gcj_properties ()
836 char *props
= getenv("GCJ_PROPERTIES");
839 size_t property_count
= 0;
844 // Whip through props quickly in order to count the number of
846 while (p
&& (p
= next_property_key (p
, &length
)))
848 // Skip to the end of the key
851 p
= next_property_value (p
, &length
);
858 // Allocate an array of property value/key pairs.
859 _Jv_Environment_Properties
=
860 (property_pair
*) malloc (sizeof(property_pair
)
861 * (property_count
+ 1));
863 // Go through the properties again, initializing _Jv_Properties
867 while (p
&& (p
= next_property_key (p
, &length
)))
869 _Jv_Environment_Properties
[property_count
].key
= p
;
870 _Jv_Environment_Properties
[property_count
].key_length
= length
;
872 // Skip to the end of the key
875 p
= next_property_value (p
, &length
);
877 _Jv_Environment_Properties
[property_count
].value
= p
;
878 _Jv_Environment_Properties
[property_count
].value_length
= length
;
885 memset ((void *) &_Jv_Environment_Properties
[property_count
],
886 0, sizeof (property_pair
));
888 // Null terminate the strings.
889 for (property_pair
*prop
= &_Jv_Environment_Properties
[0];
893 prop
->key
[prop
->key_length
] = 0;
894 prop
->value
[prop
->value_length
] = 0;
897 #endif // DISABLE_GETENV_PROPERTIES
901 _Jv_Utf8Const
*void_signature
;
902 _Jv_Utf8Const
*clinit_name
;
903 _Jv_Utf8Const
*init_name
;
904 _Jv_Utf8Const
*finit_name
;
906 bool runtimeInitialized
= false;
909 // We accept all non-standard options accepted by Sun's java command,
910 // for compatibility with existing application launch scripts.
912 parse_x_arg (char* option_string
)
914 if (strlen (option_string
) <= 0)
917 if (! strcmp (option_string
, "int"))
919 // FIXME: this should cause the vm to never load shared objects
921 else if (! strcmp (option_string
, "mixed"))
923 // FIXME: allow interpreted and native code
925 else if (! strcmp (option_string
, "batch"))
927 // FIXME: disable background JIT'ing
929 else if (! strcmp (option_string
, "debug"))
931 // FIXME: add JDWP/JVMDI support
933 else if (! strncmp (option_string
, "bootclasspath:", 14))
935 // FIXME: add a parse_bootclasspath_arg function
937 else if (! strncmp (option_string
, "bootclasspath/a:", 16))
940 else if (! strncmp (option_string
, "bootclasspath/p:", 16))
943 else if (! strcmp (option_string
, "check:jni"))
945 // FIXME: enable strict JNI checking
947 else if (! strcmp (option_string
, "future"))
949 // FIXME: enable strict class file format checks
951 else if (! strcmp (option_string
, "noclassgc"))
953 // FIXME: disable garbage collection for classes
955 else if (! strcmp (option_string
, "incgc"))
957 // FIXME: incremental garbage collection
959 else if (! strncmp (option_string
, "loggc:", 6))
961 if (option_string
[6] == '\0')
964 "libgcj: filename argument expected for loggc option\n");
967 // FIXME: set gc logging filename
969 else if (! strncmp (option_string
, "ms", 2))
971 // FIXME: ignore this option until PR 20699 is fixed.
972 // _Jv_SetInitialHeapSize (option_string + 2);
974 else if (! strncmp (option_string
, "mx", 2))
975 _Jv_SetMaximumHeapSize (option_string
+ 2);
976 else if (! strcmp (option_string
, "prof"))
978 // FIXME: enable profiling of program running in vm
980 else if (! strncmp (option_string
, "runhprof:", 9))
982 // FIXME: enable specific type of vm profiling. add a
983 // parse_runhprof_arg function
985 else if (! strcmp (option_string
, "rs"))
987 // FIXME: reduced system signal usage. disable thread dumps,
988 // only terminate in response to user-initiated calls,
989 // e.g. System.exit()
991 else if (! strncmp (option_string
, "ss", 2))
993 // FIXME: set thread stack size
995 else if (! strcmp (option_string
, "X:+UseAltSigs"))
997 // FIXME: use signals other than SIGUSR1 and SIGUSR2
999 else if (! strcmp (option_string
, "share:off"))
1001 // FIXME: don't share class data
1003 else if (! strcmp (option_string
, "share:auto"))
1005 // FIXME: share class data where possible
1007 else if (! strcmp (option_string
, "share:on"))
1009 // FIXME: fail if impossible to share class data
1016 parse_verbose_args (char* option_string
,
1017 bool ignore_unrecognized
)
1019 size_t len
= sizeof ("-verbose");
1021 if (strlen (option_string
) < len
)
1024 if (option_string
[len
] == ':'
1025 && option_string
[len
+ 1] != '\0')
1027 char* verbose_args
= option_string
+ len
+ 1;
1032 if (! strncmp (verbose_args
,
1033 "gc", (last
= sizeof ("gc")) - 1)
1034 && (verbose_args
[last
] == '\0'
1035 || verbose_args
[last
] == ','))
1037 // FIXME: we should add functions to boehm-gc that
1038 // toggle GC_print_stats, GC_PRINT_ADDRESS_MAP and
1039 // GC_print_back_height.
1042 else if (! strncmp (verbose_args
,
1044 (last
= sizeof ("class")) - 1)
1045 && (verbose_args
[last
] == '\0'
1046 || verbose_args
[last
] == ','))
1048 gcj::verbose_class_flag
= true;
1050 else if (! strncmp (verbose_args
, "jni",
1051 (last
= sizeof ("jni")) - 1)
1052 && (verbose_args
[last
] == '\0'
1053 || verbose_args
[last
] == ','))
1055 // FIXME: enable JNI messages.
1057 else if (ignore_unrecognized
1058 && verbose_args
[0] == 'X')
1060 // ignore unrecognized non-standard verbose option
1062 while (verbose_args
[last
] != '\0'
1063 && verbose_args
[last
++] != ',');
1066 if (strlen (verbose_args
) >= last
)
1068 if (verbose_args
[last
] == ',')
1070 if (verbose_args
[last
+ 1] == '\0')
1075 verbose_args
= verbose_args
+ last
+ 1;
1079 // here verbose_args[last] is either '\0' or
1080 // the first character in the next verbose
1087 // verbose_args[last] will be '\0' here if we're
1090 while (verbose_args
[last
] != '\0');
1092 else if (option_string
[len
] == 'g'
1093 && option_string
[len
+ 1] == 'c'
1094 && option_string
[len
+ 2] == '\0')
1096 // FIXME: we should add functions to boehm-gc that
1097 // toggle GC_print_stats, GC_PRINT_ADDRESS_MAP and
1098 // GC_print_back_height.
1101 else if (option_string
[len
] == '\0')
1103 gcj::verbose_class_flag
= true;
1108 // unrecognized option beginning with -verbose
1115 parse_init_args (JvVMInitArgs
* vm_args
)
1117 // if _Jv_Compiler_Properties is non-NULL then it needs to be
1118 // re-allocated dynamically.
1119 if (_Jv_Compiler_Properties
)
1121 const char** props
= _Jv_Compiler_Properties
;
1122 _Jv_Compiler_Properties
= NULL
;
1124 for (int i
= 0; props
[i
]; i
++)
1126 _Jv_Compiler_Properties
= (const char**) _Jv_Realloc
1127 (_Jv_Compiler_Properties
,
1128 (_Jv_Properties_Count
+ 1) * sizeof (const char*));
1129 _Jv_Compiler_Properties
[_Jv_Properties_Count
++] = props
[i
];
1133 if (vm_args
== NULL
)
1136 for (int i
= 0; i
< vm_args
->nOptions
; ++i
)
1138 char* option_string
= vm_args
->options
[i
].optionString
;
1139 if (! strcmp (option_string
, "vfprintf")
1140 || ! strcmp (option_string
, "exit")
1141 || ! strcmp (option_string
, "abort"))
1143 // FIXME: we are required to recognize these, but for
1144 // now we don't handle them in any way.
1147 else if (! strncmp (option_string
,
1148 "-verbose", sizeof ("-verbose") - 1))
1150 jint result
= parse_verbose_args (option_string
,
1151 vm_args
->ignoreUnrecognized
);
1155 else if (! strncmp (option_string
, "-D", 2))
1157 _Jv_Compiler_Properties
= (const char**) _Jv_Realloc
1158 (_Jv_Compiler_Properties
,
1159 (_Jv_Properties_Count
+ 1) * sizeof (char*));
1161 _Jv_Compiler_Properties
[_Jv_Properties_Count
++] =
1162 strdup (option_string
+ 2);
1166 else if (vm_args
->ignoreUnrecognized
)
1168 if (option_string
[0] == '_')
1169 parse_x_arg (option_string
+ 1);
1170 else if (! strncmp (option_string
, "-X", 2))
1171 parse_x_arg (option_string
+ 2);
1175 fprintf (stderr
, "libgcj: unknown option: %s\n", option_string
);
1180 goto unknown_option
;
1186 _Jv_CreateJavaVM (JvVMInitArgs
* vm_args
)
1188 using namespace gcj
;
1190 if (runtimeInitialized
)
1193 runtimeInitialized
= true;
1195 jint result
= parse_init_args (vm_args
);
1199 PROCESS_GCJ_PROPERTIES
;
1201 /* Threads must be initialized before the GC, so that it inherits the
1205 _Jv_InitializeSyncMutex ();
1208 _Jv_InitInterpreter ();
1219 /* Initialize Utf8 constants declared in jvm.h. */
1220 void_signature
= _Jv_makeUtf8Const ("()V", 3);
1221 clinit_name
= _Jv_makeUtf8Const ("<clinit>", 8);
1222 init_name
= _Jv_makeUtf8Const ("<init>", 6);
1223 finit_name
= _Jv_makeUtf8Const ("finit$", 6);
1225 /* Initialize built-in classes to represent primitive TYPEs. */
1226 _Jv_InitPrimClass (&_Jv_byteClass
, "byte", 'B', 1);
1227 _Jv_InitPrimClass (&_Jv_shortClass
, "short", 'S', 2);
1228 _Jv_InitPrimClass (&_Jv_intClass
, "int", 'I', 4);
1229 _Jv_InitPrimClass (&_Jv_longClass
, "long", 'J', 8);
1230 _Jv_InitPrimClass (&_Jv_booleanClass
, "boolean", 'Z', 1);
1231 _Jv_InitPrimClass (&_Jv_charClass
, "char", 'C', 2);
1232 _Jv_InitPrimClass (&_Jv_floatClass
, "float", 'F', 4);
1233 _Jv_InitPrimClass (&_Jv_doubleClass
, "double", 'D', 8);
1234 _Jv_InitPrimClass (&_Jv_voidClass
, "void", 'V', 0);
1236 // Turn stack trace generation off while creating exception objects.
1237 _Jv_InitClass (&java::lang::VMThrowable::class$
);
1238 java::lang::VMThrowable::trace_enabled
= 0;
1240 // We have to initialize this fairly early, to avoid circular class
1241 // initialization. In particular we want to start the
1242 // initialization of ClassLoader before we start the initialization
1243 // of VMClassLoader.
1244 _Jv_InitClass (&java::lang::ClassLoader::class$
);
1246 // Set up the system class loader and the bootstrap class loader.
1247 gnu::gcj::runtime::ExtensionClassLoader::initialize();
1248 java::lang::VMClassLoader::initialize(JvNewStringLatin1(TOOLEXECLIBDIR
));
1250 _Jv_RegisterBootstrapPackages();
1252 no_memory
= new java::lang::OutOfMemoryError
;
1254 java::lang::VMThrowable::trace_enabled
= 1;
1257 LTDL_SET_PRELOADED_SYMBOLS ();
1260 _Jv_platform_initialize ();
1264 _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady
);
1266 // Start the GC finalizer thread. A VirtualMachineError can be
1267 // thrown by the runtime if, say, threads aren't available.
1270 using namespace gnu::gcj::runtime
;
1271 FinalizerThread
*ft
= new FinalizerThread ();
1274 catch (java::lang::VirtualMachineError
*ignore
)
1282 _Jv_RunMain (JvVMInitArgs
*vm_args
, jclass klass
, const char *name
, int argc
,
1283 const char **argv
, bool is_jar
)
1285 #ifndef DISABLE_MAIN_ARGS
1286 _Jv_SetArgs (argc
, argv
);
1289 java::lang::Runtime
*runtime
= NULL
;
1293 if (_Jv_CreateJavaVM (vm_args
) < 0)
1295 fprintf (stderr
, "libgcj: couldn't create virtual machine\n");
1299 // Get the Runtime here. We want to initialize it before searching
1300 // for `main'; that way it will be set up if `main' is a JNI method.
1301 runtime
= java::lang::Runtime::getRuntime ();
1303 #ifdef DISABLE_MAIN_ARGS
1304 arg_vec
= JvConvertArgv (0, 0);
1306 arg_vec
= JvConvertArgv (argc
- 1, argv
+ 1);
1309 using namespace gnu::java::lang
;
1311 main_thread
= new MainThread (klass
, arg_vec
);
1313 main_thread
= new MainThread (JvNewStringLatin1 (name
),
1316 catch (java::lang::Throwable
*t
)
1318 java::lang::System::err
->println (JvNewStringLatin1
1319 ("Exception during runtime initialization"));
1320 t
->printStackTrace();
1323 // In case the runtime creation failed.
1327 _Jv_AttachCurrentThread (main_thread
);
1328 _Jv_ThreadRun (main_thread
);
1331 int status
= (int) java::lang::ThreadGroup::had_uncaught_exception
;
1332 runtime
->exit (status
);
1336 _Jv_RunMain (jclass klass
, const char *name
, int argc
, const char **argv
,
1339 _Jv_RunMain (NULL
, klass
, name
, argc
, argv
, is_jar
);
1343 JvRunMain (jclass klass
, int argc
, const char **argv
)
1345 _Jv_RunMain (klass
, NULL
, argc
, argv
, false);
1350 // Parse a string and return a heap size.
1352 parse_heap_size (const char *spec
)
1355 unsigned long val
= strtoul (spec
, &end
, 10);
1356 if (*end
== 'k' || *end
== 'K')
1358 else if (*end
== 'm' || *end
== 'M')
1360 return (size_t) val
;
1363 // Set the initial heap size. This might be ignored by the GC layer.
1364 // This must be called before _Jv_RunMain.
1366 _Jv_SetInitialHeapSize (const char *arg
)
1368 size_t size
= parse_heap_size (arg
);
1369 _Jv_GCSetInitialHeapSize (size
);
1372 // Set the maximum heap size. This might be ignored by the GC layer.
1373 // This must be called before _Jv_RunMain.
1375 _Jv_SetMaximumHeapSize (const char *arg
)
1377 size_t size
= parse_heap_size (arg
);
1378 _Jv_GCSetMaximumHeapSize (size
);
1384 _Jv_Malloc (jsize size
)
1386 if (__builtin_expect (size
== 0, false))
1388 void *ptr
= malloc ((size_t) size
);
1389 if (__builtin_expect (ptr
== NULL
, false))
1395 _Jv_Realloc (void *ptr
, jsize size
)
1397 if (__builtin_expect (size
== 0, false))
1399 ptr
= realloc (ptr
, (size_t) size
);
1400 if (__builtin_expect (ptr
== NULL
, false))
1406 _Jv_MallocUnchecked (jsize size
)
1408 if (__builtin_expect (size
== 0, false))
1410 return malloc ((size_t) size
);
1414 _Jv_Free (void* ptr
)
1421 // In theory, these routines can be #ifdef'd away on machines which
1422 // support divide overflow signals. However, we never know if some
1423 // code might have been compiled with "-fuse-divide-subroutine", so we
1424 // always include them in libgcj.
1427 _Jv_divI (jint dividend
, jint divisor
)
1429 if (__builtin_expect (divisor
== 0, false))
1431 java::lang::ArithmeticException
*arithexception
1432 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1433 throw arithexception
;
1436 if (dividend
== (jint
) 0x80000000L
&& divisor
== -1)
1439 return dividend
/ divisor
;
1443 _Jv_remI (jint dividend
, jint divisor
)
1445 if (__builtin_expect (divisor
== 0, false))
1447 java::lang::ArithmeticException
*arithexception
1448 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1449 throw arithexception
;
1452 if (dividend
== (jint
) 0x80000000L
&& divisor
== -1)
1455 return dividend
% divisor
;
1459 _Jv_divJ (jlong dividend
, jlong divisor
)
1461 if (__builtin_expect (divisor
== 0, false))
1463 java::lang::ArithmeticException
*arithexception
1464 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1465 throw arithexception
;
1468 if (dividend
== (jlong
) 0x8000000000000000LL
&& divisor
== -1)
1471 return dividend
/ divisor
;
1475 _Jv_remJ (jlong dividend
, jlong divisor
)
1477 if (__builtin_expect (divisor
== 0, false))
1479 java::lang::ArithmeticException
*arithexception
1480 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1481 throw arithexception
;
1484 if (dividend
== (jlong
) 0x8000000000000000LL
&& divisor
== -1)
1487 return dividend
% divisor
;
1492 // Return true if SELF_KLASS can access a field or method in
1493 // OTHER_KLASS. The field or method's access flags are specified in
1496 _Jv_CheckAccess (jclass self_klass
, jclass other_klass
, jint flags
)
1498 using namespace java::lang::reflect
;
1499 return ((self_klass
== other_klass
)
1500 || ((flags
& Modifier::PUBLIC
) != 0)
1501 || (((flags
& Modifier::PROTECTED
) != 0)
1502 && _Jv_IsAssignableFromSlow (other_klass
, self_klass
))
1503 || (((flags
& Modifier::PRIVATE
) == 0)
1504 && _Jv_ClassNameSamePackage (self_klass
->name
,
1505 other_klass
->name
)));