1 // prims.cc - Code for core of runtime environment.
3 /* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 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/ClassNotFoundException.h>
53 #include <java/lang/InternalError.h>
54 #include <java/lang/NegativeArraySizeException.h>
55 #include <java/lang/NoClassDefFoundError.h>
56 #include <java/lang/NullPointerException.h>
57 #include <java/lang/OutOfMemoryError.h>
58 #include <java/lang/System.h>
59 #include <java/lang/VMClassLoader.h>
60 #include <java/lang/reflect/Modifier.h>
61 #include <java/io/PrintStream.h>
62 #include <java/lang/UnsatisfiedLinkError.h>
63 #include <java/lang/VirtualMachineError.h>
64 #include <gnu/gcj/runtime/ExtensionClassLoader.h>
65 #include <gnu/gcj/runtime/FinalizerThread.h>
66 #include <execution.h>
67 #include <gnu/classpath/jdwp/Jdwp.h>
68 #include <gnu/classpath/jdwp/VMVirtualMachine.h>
69 #include <gnu/classpath/jdwp/event/VmDeathEvent.h>
70 #include <gnu/classpath/jdwp/event/VmInitEvent.h>
71 #include <gnu/java/lang/MainThread.h>
77 // Execution engine for compiled code.
78 _Jv_CompiledEngine _Jv_soleCompiledEngine;
80 // Execution engine for code compiled with -findirect-classes
81 _Jv_IndirectCompiledEngine _Jv_soleIndirectCompiledEngine;
83 // We allocate a single OutOfMemoryError exception which we keep
84 // around for use if we run out of memory.
85 static java::lang::OutOfMemoryError *no_memory;
87 // Number of bytes in largest array object we create. This could be
88 // increased to the largest size_t value, so long as the appropriate
89 // functions are changed to take a size_t argument instead of jint.
90 #define MAX_OBJECT_SIZE (((size_t)1<<31) - 1)
92 // Properties set at compile time.
93 const char **_Jv_Compiler_Properties = NULL;
94 int _Jv_Properties_Count = 0;
96 #ifndef DISABLE_GETENV_PROPERTIES
97 // Property key/value pairs.
98 property_pair *_Jv_Environment_Properties;
101 // Stash the argv pointer to benefit native libraries that need it.
102 const char **_Jv_argv;
106 static bool remoteDebug = false;
107 static char defaultJdwpOptions[] = "";
108 static char *jdwpOptions = defaultJdwpOptions;
114 // _Jv_argc is 0 if not explicitly initialized.
119 _Jv_GetSafeArg (int index)
121 if (index >=0 && index < _Jv_GetNbArgs ())
122 return _Jv_argv[index];
128 _Jv_SetArgs (int argc, const char **argv)
135 // Pointer to JVMPI notification functions.
136 void (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (JVMPI_Event *event);
137 void (*_Jv_JVMPI_Notify_THREAD_START) (JVMPI_Event *event);
138 void (*_Jv_JVMPI_Notify_THREAD_END) (JVMPI_Event *event);
142 #if defined (HANDLE_SEGV) || defined(HANDLE_FPE)
143 /* Unblock a signal. Unless we do this, the signal may only be sent
146 unblock_signal (int signum __attribute__ ((__unused__)))
148 #ifdef _POSIX_VERSION
152 sigaddset (&sigs, signum);
153 sigprocmask (SIG_UNBLOCK, &sigs, NULL);
159 SIGNAL_HANDLER (catch_segv)
161 unblock_signal (SIGSEGV);
162 MAKE_THROW_FRAME (nullp);
163 java::lang::NullPointerException *nullp
164 = new java::lang::NullPointerException;
170 SIGNAL_HANDLER (catch_fpe)
172 unblock_signal (SIGFPE);
173 #ifdef HANDLE_DIVIDE_OVERFLOW
174 HANDLE_DIVIDE_OVERFLOW;
176 MAKE_THROW_FRAME (arithexception);
178 java::lang::ArithmeticException *arithexception
179 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
180 throw arithexception;
186 _Jv_equalUtf8Consts (const Utf8Const* a, const Utf8Const *b)
189 const _Jv_ushort *aptr, *bptr;
192 if (a->hash != b->hash)
195 if (b->length != len)
197 aptr = (const _Jv_ushort *)a->data;
198 bptr = (const _Jv_ushort *)b->data;
199 len = (len + 1) >> 1;
201 if (*aptr++ != *bptr++)
206 /* True iff A is equal to STR.
207 HASH is STR->hashCode().
211 _Jv_equal (Utf8Const* a, jstring str, jint hash)
213 if (a->hash != (_Jv_ushort) hash)
215 jint len = str->length();
217 jchar *sptr = _Jv_GetStringChars (str);
218 unsigned char* ptr = (unsigned char*) a->data;
219 unsigned char* limit = ptr + a->length;
222 int ch = UTF8_GET (ptr, limit);
231 /* Like _Jv_equal, but stop after N characters. */
233 _Jv_equaln (Utf8Const *a, jstring str, jint n)
235 jint len = str->length();
237 jchar *sptr = _Jv_GetStringChars (str);
238 unsigned char* ptr = (unsigned char*) a->data;
239 unsigned char* limit = ptr + a->length;
240 for (; n-- > 0; i++, sptr++)
242 int ch = UTF8_GET (ptr, limit);
251 // Determines whether the given Utf8Const object contains
252 // a type which is primitive or some derived form of it, eg.
253 // an array or multi-dimensional array variant.
255 _Jv_isPrimitiveOrDerived(const Utf8Const *a)
257 unsigned char *aptr = (unsigned char *) a->data;
258 unsigned char *alimit = aptr + a->length;
259 int ac = UTF8_GET(aptr, alimit);
261 // Skips any leading array marks.
263 ac = UTF8_GET(aptr, alimit);
265 // There should not be another character. This implies that
266 // the type name is only one character long.
267 if (UTF8_GET(aptr, alimit) == -1)
286 // Find out whether two _Jv_Utf8Const candidates contain the same
288 // The method is written to handle the different formats of classnames.
289 // Eg. "Ljava/lang/Class;", "Ljava.lang.Class;", "java/lang/Class" and
290 // "java.lang.Class" will be seen as equal.
291 // Warning: This function is not smart enough to declare "Z" and "boolean"
292 // and similar cases as equal (and is not meant to be used this way)!
294 _Jv_equalUtf8Classnames (const Utf8Const *a, const Utf8Const *b)
296 // If the class name's length differs by two characters
297 // it is possible that we have candidates which are given
298 // in the two different formats ("Lp1/p2/cn;" vs. "p1/p2/cn")
299 switch (a->length - b->length)
309 unsigned char *aptr = (unsigned char *) a->data;
310 unsigned char *alimit = aptr + a->length;
311 unsigned char *bptr = (unsigned char *) b->data;
312 unsigned char *blimit = bptr + b->length;
314 if (alimit[-1] == ';')
317 if (blimit[-1] == ';')
320 int ac = UTF8_GET(aptr, alimit);
321 int bc = UTF8_GET(bptr, blimit);
323 // Checks whether both strings have the same amount of leading [ characters.
328 ac = UTF8_GET(aptr, alimit);
329 bc = UTF8_GET(bptr, blimit);
336 // Skips leading L character.
338 ac = UTF8_GET(aptr, alimit);
341 bc = UTF8_GET(bptr, blimit);
343 // Compares the remaining characters.
344 while (ac != -1 && bc != -1)
346 // Replaces package separating dots with slashes.
353 // Now classnames differ if there is at least one non-matching
358 ac = UTF8_GET(aptr, alimit);
359 bc = UTF8_GET(bptr, blimit);
365 /* Count the number of Unicode chars encoded in a given Ut8 string. */
367 _Jv_strLengthUtf8(const char* str, int len)
370 unsigned char* limit;
373 ptr = (unsigned char*) str;
376 for (; ptr < limit; str_length++)
378 if (UTF8_GET (ptr, limit) < 0)
384 /* Calculate a hash value for a string encoded in Utf8 format.
385 * This returns the same hash value as specified or java.lang.String.hashCode.
388 _Jv_hashUtf8String (const char* str, int len)
390 unsigned char* ptr = (unsigned char*) str;
391 unsigned char* limit = ptr + len;
396 int ch = UTF8_GET (ptr, limit);
397 /* Updated specification from
398 http://www.javasoft.com/docs/books/jls/clarify.html. */
399 hash = (31 * hash) + ch;
405 _Jv_Utf8Const::init(const char *s, int len)
407 ::memcpy (data, s, len);
410 hash = _Jv_hashUtf8String (s, len) & 0xFFFF;
414 _Jv_makeUtf8Const (const char* s, int len)
419 = (Utf8Const*) _Jv_AllocBytes (_Jv_Utf8Const::space_needed(s, len));
425 _Jv_makeUtf8Const (jstring string)
427 jint hash = string->hashCode ();
428 jint len = _Jv_GetStringUTFLength (string);
430 Utf8Const* m = (Utf8Const*)
431 _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
436 _Jv_GetStringUTFRegion (string, 0, string->length (), m->data);
446 _Jv_Abort (const char *function, const char *file, int line,
450 _Jv_Abort (const char *, const char *, int, const char *message)
455 "libgcj failure: %s\n in function %s, file %s, line %d\n",
456 message, function, file, line);
458 fprintf (stderr, "libgcj failure: %s\n", message);
464 fail_on_finalization (jobject)
466 JvFail ("object was finalized");
470 _Jv_GCWatch (jobject obj)
472 _Jv_RegisterFinalizer (obj, fail_on_finalization);
476 _Jv_ThrowBadArrayIndex(jint bad_index)
478 throw new java::lang::ArrayIndexOutOfBoundsException
479 (java::lang::String::valueOf (bad_index));
483 _Jv_ThrowNullPointerException ()
485 throw new java::lang::NullPointerException;
488 // Resolve an entry in the constant pool and return the target
491 _Jv_ResolvePoolEntry (jclass this_class, jint index)
493 _Jv_Constants *pool = &this_class->constants;
495 if ((pool->tags[index] & JV_CONSTANT_ResolvedFlag) != 0)
496 return pool->data[index].field->u.addr;
498 JvSynchronize sync (this_class);
499 return (_Jv_Linker::resolve_pool_entry (this_class, index))
504 // Explicitly throw a no memory exception.
505 // The collector calls this when it encounters an out-of-memory condition.
506 void _Jv_ThrowNoMemory()
512 # define JVMPI_NOTIFY_ALLOC(klass,size,obj) \
513 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false)) \
514 jvmpi_notify_alloc(klass,size,obj);
516 jvmpi_notify_alloc(jclass klass, jint size, jobject obj)
518 // Service JVMPI allocation request.
521 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
523 event.u.obj_alloc.arena_id = 0;
524 event.u.obj_alloc.class_id = (jobjectID) klass;
525 event.u.obj_alloc.is_array = 0;
526 event.u.obj_alloc.size = size;
527 event.u.obj_alloc.obj_id = (jobjectID) obj;
529 // FIXME: This doesn't look right for the Boehm GC. A GC may
530 // already be in progress. _Jv_DisableGC () doesn't wait for it.
531 // More importantly, I don't see the need for disabling GC, since we
532 // blatantly have a pointer to obj on our stack, ensuring that the
533 // object can't be collected. Even for a nonconservative collector,
534 // it appears to me that this must be true, since we are about to
535 // return obj. Isn't this whole approach way too intrusive for
536 // a useful profiling interface? - HB
538 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
541 #else /* !ENABLE_JVMPI */
542 # define JVMPI_NOTIFY_ALLOC(klass,size,obj) /* do nothing */
545 // Allocate a new object of class KLASS.
546 // First a version that assumes that we have no finalizer, and that
547 // the class is already initialized.
548 // If we know that JVMPI is disabled, this can be replaced by a direct call
549 // to the allocator for the appropriate GC.
551 _Jv_AllocObjectNoInitNoFinalizer (jclass klass)
553 jint size = klass->size ();
554 jobject obj = (jobject) _Jv_AllocObj (size, klass);
555 JVMPI_NOTIFY_ALLOC (klass, size, obj);
559 // And now a version that initializes if necessary.
561 _Jv_AllocObjectNoFinalizer (jclass klass)
563 if (_Jv_IsPhantomClass(klass) )
564 throw new java::lang::NoClassDefFoundError(klass->getName());
566 _Jv_InitClass (klass);
567 jint size = klass->size ();
568 jobject obj = (jobject) _Jv_AllocObj (size, klass);
569 JVMPI_NOTIFY_ALLOC (klass, size, obj);
573 // And now the general version that registers a finalizer if necessary.
575 _Jv_AllocObject (jclass klass)
577 jobject obj = _Jv_AllocObjectNoFinalizer (klass);
579 // We assume that the compiler only generates calls to this routine
580 // if there really is an interesting finalizer.
581 // Unfortunately, we still have to the dynamic test, since there may
582 // be cni calls to this routine.
583 // Note that on IA64 get_finalizer() returns the starting address of the
584 // function, not a function pointer. Thus this still works.
585 if (klass->vtable->get_finalizer ()
586 != java::lang::Object::class$.vtable->get_finalizer ())
587 _Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
591 // Allocate a String, including variable length storage.
593 _Jv_AllocString(jsize len)
595 using namespace java::lang;
597 jsize sz = sizeof(java::lang::String) + len * sizeof(jchar);
599 // We assert that for strings allocated this way, the data field
600 // will always point to the object itself. Thus there is no reason
601 // for the garbage collector to scan any of it.
602 // Furthermore, we're about to overwrite the string data, so
603 // initialization of the object is not an issue.
605 // String needs no initialization, and there is no finalizer, so
606 // we can go directly to the collector's allocator interface.
607 jstring obj = (jstring) _Jv_AllocPtrFreeObj(sz, &String::class$);
610 obj->boffset = sizeof(java::lang::String);
612 obj->cachedHashCode = 0;
614 JVMPI_NOTIFY_ALLOC (&String::class$, sz, obj);
619 // A version of the above that assumes the object contains no pointers,
620 // and requires no finalization. This can't happen if we need pointers
622 #ifdef JV_HASH_SYNCHRONIZATION
624 _Jv_AllocPtrFreeObject (jclass klass)
626 _Jv_InitClass (klass);
627 jint size = klass->size ();
629 jobject obj = (jobject) _Jv_AllocPtrFreeObj (size, klass);
631 JVMPI_NOTIFY_ALLOC (klass, size, obj);
635 #endif /* JV_HASH_SYNCHRONIZATION */
638 // Allocate a new array of Java objects. Each object is of type
639 // `elementClass'. `init' is used to initialize each slot in the
642 _Jv_NewObjectArray (jsize count, jclass elementClass, jobject init)
644 // Creating an array of an unresolved type is impossible. So we throw
645 // the NoClassDefFoundError.
646 if ( _Jv_IsPhantomClass(elementClass) )
647 throw new java::lang::NoClassDefFoundError(elementClass->getName());
649 if (__builtin_expect (count < 0, false))
650 throw new java::lang::NegativeArraySizeException;
652 JvAssert (! elementClass->isPrimitive ());
654 // Ensure that elements pointer is properly aligned.
655 jobjectArray obj = NULL;
656 size_t size = (size_t) elements (obj);
657 // Check for overflow.
658 if (__builtin_expect ((size_t) count >
659 (MAX_OBJECT_SIZE - 1 - size) / sizeof (jobject), false))
662 size += count * sizeof (jobject);
664 jclass klass = _Jv_GetArrayClass (elementClass,
665 elementClass->getClassLoaderInternal());
667 obj = (jobjectArray) _Jv_AllocArray (size, klass);
669 jsize *lp = const_cast<jsize *> (&obj->length);
671 // We know the allocator returns zeroed memory. So don't bother
675 jobject *ptr = elements(obj);
682 // Allocate a new array of primitives. ELTYPE is the type of the
683 // element, COUNT is the size of the array.
685 _Jv_NewPrimArray (jclass eltype, jint count)
687 int elsize = eltype->size();
688 if (__builtin_expect (count < 0, false))
689 throw new java::lang::NegativeArraySizeException;
691 JvAssert (eltype->isPrimitive ());
692 jobject dummy = NULL;
693 size_t size = (size_t) _Jv_GetArrayElementFromElementType (dummy, eltype);
695 // Check for overflow.
696 if (__builtin_expect ((size_t) count >
697 (MAX_OBJECT_SIZE - size) / elsize, false))
700 jclass klass = _Jv_GetArrayClass (eltype, 0);
702 # ifdef JV_HASH_SYNCHRONIZATION
703 // Since the vtable is always statically allocated,
704 // these are completely pointerfree! Make sure the GC doesn't touch them.
706 (__JArray*) _Jv_AllocPtrFreeObj (size + elsize * count, klass);
707 memset((char *)arr + size, 0, elsize * count);
709 __JArray *arr = (__JArray*) _Jv_AllocObj (size + elsize * count, klass);
710 // Note that we assume we are given zeroed memory by the allocator.
713 jsize *lp = const_cast<jsize *> (&arr->length);
720 _Jv_NewArray (jint type, jint size)
724 case 4: return JvNewBooleanArray (size);
725 case 5: return JvNewCharArray (size);
726 case 6: return JvNewFloatArray (size);
727 case 7: return JvNewDoubleArray (size);
728 case 8: return JvNewByteArray (size);
729 case 9: return JvNewShortArray (size);
730 case 10: return JvNewIntArray (size);
731 case 11: return JvNewLongArray (size);
733 throw new java::lang::InternalError
734 (JvNewStringLatin1 ("invalid type code in _Jv_NewArray"));
737 // Allocate a possibly multi-dimensional array but don't check that
738 // any array length is <0.
740 _Jv_NewMultiArrayUnchecked (jclass type, jint dimensions, jint *sizes)
742 JvAssert (type->isArray());
743 jclass element_type = type->getComponentType();
745 if (element_type->isPrimitive())
746 result = _Jv_NewPrimArray (element_type, sizes[0]);
748 result = _Jv_NewObjectArray (sizes[0], element_type, NULL);
752 JvAssert (! element_type->isPrimitive());
753 JvAssert (element_type->isArray());
754 jobject *contents = elements ((jobjectArray) result);
755 for (int i = 0; i < sizes[0]; ++i)
756 contents[i] = _Jv_NewMultiArrayUnchecked (element_type, dimensions - 1,
764 _Jv_NewMultiArray (jclass type, jint dimensions, jint *sizes)
766 for (int i = 0; i < dimensions; ++i)
768 throw new java::lang::NegativeArraySizeException;
770 return _Jv_NewMultiArrayUnchecked (type, dimensions, sizes);
774 _Jv_NewMultiArray (jclass array_type, jint dimensions, ...)
776 // Creating an array of an unresolved type is impossible. So we throw
777 // the NoClassDefFoundError.
778 if (_Jv_IsPhantomClass(array_type))
779 throw new java::lang::NoClassDefFoundError(array_type->getName());
782 jint sizes[dimensions];
783 va_start (args, dimensions);
784 for (int i = 0; i < dimensions; ++i)
786 jint size = va_arg (args, jint);
788 throw new java::lang::NegativeArraySizeException;
793 return _Jv_NewMultiArrayUnchecked (array_type, dimensions, sizes);
798 // Ensure 8-byte alignment, for hash synchronization.
799 #define DECLARE_PRIM_TYPE(NAME) \
800 java::lang::Class _Jv_##NAME##Class __attribute__ ((aligned (8)));
802 DECLARE_PRIM_TYPE(byte)
803 DECLARE_PRIM_TYPE(short)
804 DECLARE_PRIM_TYPE(int)
805 DECLARE_PRIM_TYPE(long)
806 DECLARE_PRIM_TYPE(boolean)
807 DECLARE_PRIM_TYPE(char)
808 DECLARE_PRIM_TYPE(float)
809 DECLARE_PRIM_TYPE(double)
810 DECLARE_PRIM_TYPE(void)
813 _Jv_InitPrimClass (jclass cl, const char *cname, char sig, int len)
815 using namespace java::lang::reflect;
817 // We must set the vtable for the class; the Java constructor
819 (*(_Jv_VTable **) cl) = java::lang::Class::class$.vtable;
821 // Initialize the fields we care about. We do this in the same
822 // order they are declared in Class.h.
823 cl->name = _Jv_makeUtf8Const ((char *) cname, -1);
824 cl->accflags = Modifier::PUBLIC | Modifier::FINAL | Modifier::ABSTRACT;
825 cl->method_count = sig;
826 cl->size_in_bytes = len;
827 cl->vtable = JV_PRIMITIVE_VTABLE;
828 cl->state = JV_STATE_DONE;
833 _Jv_FindClassFromSignature (char *sig, java::lang::ClassLoader *loader,
836 // First count arrays.
844 jclass result = NULL;
848 result = JvPrimClass (byte);
851 result = JvPrimClass (short);
854 result = JvPrimClass (int);
857 result = JvPrimClass (long);
860 result = JvPrimClass (boolean);
863 result = JvPrimClass (char);
866 result = JvPrimClass (float);
869 result = JvPrimClass (double);
872 result = JvPrimClass (void);
877 while (*sig && *sig != ';')
879 // Do nothing if signature appears to be malformed.
882 _Jv_Utf8Const *name = _Jv_makeUtf8Const (save, sig - save);
883 result = _Jv_FindClass (name, loader);
888 // Do nothing -- bad signature.
894 // Not really the "end", but the last valid character that we
903 while (array_count-- > 0)
904 result = _Jv_GetArrayClass (result, loader);
910 _Jv_FindClassFromSignatureNoException (char *sig, java::lang::ClassLoader *loader,
917 klass = _Jv_FindClassFromSignature(sig, loader, endp);
919 catch (java::lang::NoClassDefFoundError *ncdfe)
923 catch (java::lang::ClassNotFoundException *cnfe)
932 JvConvertArgv (int argc, const char **argv)
936 jobjectArray ar = JvNewObjectArray(argc, &java::lang::String::class$, NULL);
937 jobject *ptr = elements(ar);
938 jbyteArray bytes = NULL;
939 for (int i = 0; i < argc; i++)
941 const char *arg = argv[i];
942 int len = strlen (arg);
943 if (bytes == NULL || bytes->length < len)
944 bytes = JvNewByteArray (len);
945 jbyte *bytePtr = elements (bytes);
946 // We assume jbyte == char.
947 memcpy (bytePtr, arg, len);
949 // Now convert using the default encoding.
950 *ptr++ = new java::lang::String (bytes, 0, len);
952 return (JArray<jstring>*) ar;
955 // FIXME: These variables are static so that they will be
956 // automatically scanned by the Boehm collector. This is needed
957 // because with qthreads the collector won't scan the initial stack --
958 // it will only scan the qthreads stacks.
960 // Command line arguments.
961 static JArray<jstring> *arg_vec;
963 // The primary thread.
964 static java::lang::Thread *main_thread;
966 #ifndef DISABLE_GETENV_PROPERTIES
969 next_property_key (char *s, size_t *length)
975 // Skip over whitespace
979 // If we've reached the end, return NULL. Also return NULL if for
980 // some reason we've come across a malformed property string.
986 // Determine the length of the property key.
1004 next_property_value (char *s, size_t *length)
1010 while (isspace (*s))
1017 while (isspace (*s))
1020 // Determine the length of the property value.
1039 process_gcj_properties ()
1041 char *props = getenv("GCJ_PROPERTIES");
1046 // Later on we will write \0s into this string. It is simplest to
1047 // just duplicate it here.
1048 props = strdup (props);
1052 size_t property_count = 0;
1054 // Whip through props quickly in order to count the number of
1056 while (p && (p = next_property_key (p, &length)))
1058 // Skip to the end of the key
1061 p = next_property_value (p, &length);
1068 // Allocate an array of property value/key pairs.
1069 _Jv_Environment_Properties =
1070 (property_pair *) malloc (sizeof(property_pair)
1071 * (property_count + 1));
1073 // Go through the properties again, initializing _Jv_Properties
1077 while (p && (p = next_property_key (p, &length)))
1079 _Jv_Environment_Properties[property_count].key = p;
1080 _Jv_Environment_Properties[property_count].key_length = length;
1082 // Skip to the end of the key
1085 p = next_property_value (p, &length);
1087 _Jv_Environment_Properties[property_count].value = p;
1088 _Jv_Environment_Properties[property_count].value_length = length;
1095 memset ((void *) &_Jv_Environment_Properties[property_count],
1096 0, sizeof (property_pair));
1098 // Null terminate the strings.
1099 for (property_pair *prop = &_Jv_Environment_Properties[0];
1103 prop->key[prop->key_length] = 0;
1104 prop->value[prop->value_length] = 0;
1107 #endif // DISABLE_GETENV_PROPERTIES
1111 _Jv_Utf8Const *void_signature;
1112 _Jv_Utf8Const *clinit_name;
1113 _Jv_Utf8Const *init_name;
1114 _Jv_Utf8Const *finit_name;
1116 bool runtimeInitialized = false;
1118 // When true, print debugging information about class loading.
1119 bool verbose_class_flag;
1121 // When true, enable the bytecode verifier and BC-ABI type verification.
1122 bool verifyClasses = true;
1124 // Thread stack size specified by the -Xss runtime argument.
1125 size_t stack_size = 0;
1127 // Start time of the VM
1128 jlong startTime = 0;
1130 // Arguments passed to the VM
1131 JArray<jstring>* vmArgs;
1133 // Currently loaded classes
1134 jint loadedClasses = 0;
1137 jlong unloadedClasses = 0;
1140 // We accept all non-standard options accepted by Sun's java command,
1141 // for compatibility with existing application launch scripts.
1143 parse_x_arg (char* option_string)
1145 if (strlen (option_string) <= 0)
1148 if (! strcmp (option_string, "int"))
1150 // FIXME: this should cause the vm to never load shared objects
1152 else if (! strcmp (option_string, "mixed"))
1154 // FIXME: allow interpreted and native code
1156 else if (! strcmp (option_string, "batch"))
1158 // FIXME: disable background JIT'ing
1160 else if (! strcmp (option_string, "debug"))
1164 else if (! strncmp (option_string, "runjdwp:", 8))
1166 if (strlen (option_string) > 8)
1167 jdwpOptions = &option_string[8];
1171 "libgcj: argument required for JDWP options");
1175 else if (! strncmp (option_string, "bootclasspath:", 14))
1177 // FIXME: add a parse_bootclasspath_arg function
1179 else if (! strncmp (option_string, "bootclasspath/a:", 16))
1182 else if (! strncmp (option_string, "bootclasspath/p:", 16))
1185 else if (! strcmp (option_string, "check:jni"))
1187 // FIXME: enable strict JNI checking
1189 else if (! strcmp (option_string, "future"))
1191 // FIXME: enable strict class file format checks
1193 else if (! strcmp (option_string, "noclassgc"))
1195 // FIXME: disable garbage collection for classes
1197 else if (! strcmp (option_string, "incgc"))
1199 // FIXME: incremental garbage collection
1201 else if (! strncmp (option_string, "loggc:", 6))
1203 if (option_string[6] == '\0')
1206 "libgcj: filename argument expected for loggc option\n");
1209 // FIXME: set gc logging filename
1211 else if (! strncmp (option_string, "ms", 2))
1213 // FIXME: ignore this option until PR 20699 is fixed.
1214 // _Jv_SetInitialHeapSize (option_string + 2);
1216 else if (! strncmp (option_string, "mx", 2))
1217 _Jv_SetMaximumHeapSize (option_string + 2);
1218 else if (! strcmp (option_string, "prof"))
1220 // FIXME: enable profiling of program running in vm
1222 else if (! strncmp (option_string, "runhprof:", 9))
1224 // FIXME: enable specific type of vm profiling. add a
1225 // parse_runhprof_arg function
1227 else if (! strcmp (option_string, "rs"))
1229 // FIXME: reduced system signal usage. disable thread dumps,
1230 // only terminate in response to user-initiated calls,
1231 // e.g. System.exit()
1233 else if (! strncmp (option_string, "ss", 2))
1235 _Jv_SetStackSize (option_string + 2);
1237 else if (! strcmp (option_string, "X:+UseAltSigs"))
1239 // FIXME: use signals other than SIGUSR1 and SIGUSR2
1241 else if (! strcmp (option_string, "share:off"))
1243 // FIXME: don't share class data
1245 else if (! strcmp (option_string, "share:auto"))
1247 // FIXME: share class data where possible
1249 else if (! strcmp (option_string, "share:on"))
1251 // FIXME: fail if impossible to share class data
1258 parse_verbose_args (char* option_string,
1259 bool ignore_unrecognized)
1261 size_t len = sizeof ("-verbose") - 1;
1263 if (strlen (option_string) < len)
1266 if (option_string[len] == ':'
1267 && option_string[len + 1] != '\0')
1269 char* verbose_args = option_string + len + 1;
1273 if (! strncmp (verbose_args,
1274 "gc", sizeof ("gc") - 1))
1276 if (verbose_args[sizeof ("gc") - 1] == '\0'
1277 || verbose_args[sizeof ("gc") - 1] == ',')
1279 // FIXME: we should add functions to boehm-gc that
1280 // toggle GC_print_stats, GC_PRINT_ADDRESS_MAP and
1281 // GC_print_back_height.
1282 verbose_args += sizeof ("gc") - 1;
1287 fprintf (stderr, "libgcj: unknown verbose option: %s\n",
1292 else if (! strncmp (verbose_args,
1294 sizeof ("class") - 1))
1296 if (verbose_args[sizeof ("class") - 1] == '\0'
1297 || verbose_args[sizeof ("class") - 1] == ',')
1299 gcj::verbose_class_flag = true;
1300 verbose_args += sizeof ("class") - 1;
1303 goto verbose_arg_err;
1305 else if (! strncmp (verbose_args, "jni",
1306 sizeof ("jni") - 1))
1308 if (verbose_args[sizeof ("jni") - 1] == '\0'
1309 || verbose_args[sizeof ("jni") - 1] == ',')
1311 // FIXME: enable JNI messages.
1312 verbose_args += sizeof ("jni") - 1;
1315 goto verbose_arg_err;
1317 else if (ignore_unrecognized
1318 && verbose_args[0] == 'X')
1320 // ignore unrecognized non-standard verbose option
1321 while (verbose_args[0] != '\0'
1322 && verbose_args[0] != ',')
1325 else if (verbose_args[0] == ',')
1330 goto verbose_arg_err;
1332 if (verbose_args[0] == ',')
1335 while (verbose_args[0] != '\0');
1337 else if (option_string[len] == 'g'
1338 && option_string[len + 1] == 'c'
1339 && option_string[len + 2] == '\0')
1341 // FIXME: we should add functions to boehm-gc that
1342 // toggle GC_print_stats, GC_PRINT_ADDRESS_MAP and
1343 // GC_print_back_height.
1346 else if (option_string[len] == '\0')
1348 gcj::verbose_class_flag = true;
1353 // unrecognized option beginning with -verbose
1360 parse_init_args (JvVMInitArgs* vm_args)
1362 // if _Jv_Compiler_Properties is non-NULL then it needs to be
1363 // re-allocated dynamically.
1364 if (_Jv_Compiler_Properties)
1366 const char** props = _Jv_Compiler_Properties;
1367 _Jv_Compiler_Properties = NULL;
1369 for (int i = 0; props[i]; i++)
1371 _Jv_Compiler_Properties = (const char**) _Jv_Realloc
1372 (_Jv_Compiler_Properties,
1373 (_Jv_Properties_Count + 1) * sizeof (const char*));
1374 _Jv_Compiler_Properties[_Jv_Properties_Count++] = props[i];
1378 if (vm_args == NULL)
1381 for (int i = 0; i < vm_args->nOptions; ++i)
1383 char* option_string = vm_args->options[i].optionString;
1384 if (! strcmp (option_string, "vfprintf")
1385 || ! strcmp (option_string, "exit")
1386 || ! strcmp (option_string, "abort"))
1388 // FIXME: we are required to recognize these, but for
1389 // now we don't handle them in any way.
1392 else if (! strncmp (option_string,
1393 "-verbose", sizeof ("-verbose") - 1))
1395 jint result = parse_verbose_args (option_string,
1396 vm_args->ignoreUnrecognized);
1400 else if (! strncmp (option_string, "-D", 2))
1402 _Jv_Compiler_Properties = (const char**) _Jv_Realloc
1403 (_Jv_Compiler_Properties,
1404 (_Jv_Properties_Count + 1) * sizeof (char*));
1406 _Jv_Compiler_Properties[_Jv_Properties_Count++] =
1407 strdup (option_string + 2);
1411 else if (vm_args->ignoreUnrecognized)
1413 if (option_string[0] == '_')
1414 parse_x_arg (option_string + 1);
1415 else if (! strncmp (option_string, "-X", 2))
1416 parse_x_arg (option_string + 2);
1420 fprintf (stderr, "libgcj: unknown option: %s\n", option_string);
1425 goto unknown_option;
1431 _Jv_CreateJavaVM (JvVMInitArgs* vm_args)
1433 using namespace gcj;
1435 if (runtimeInitialized)
1438 runtimeInitialized = true;
1439 startTime = _Jv_platform_gettimeofday();
1441 jint result = parse_init_args (vm_args);
1445 PROCESS_GCJ_PROPERTIES;
1447 /* Threads must be initialized before the GC, so that it inherits the
1451 _Jv_InitializeSyncMutex ();
1454 _Jv_InitInterpreter ();
1465 /* Initialize Utf8 constants declared in jvm.h. */
1466 void_signature = _Jv_makeUtf8Const ("()V", 3);
1467 clinit_name = _Jv_makeUtf8Const ("<clinit>", 8);
1468 init_name = _Jv_makeUtf8Const ("<init>", 6);
1469 finit_name = _Jv_makeUtf8Const ("finit$", 6);
1471 /* Initialize built-in classes to represent primitive TYPEs. */
1472 _Jv_InitPrimClass (&_Jv_byteClass, "byte", 'B', 1);
1473 _Jv_InitPrimClass (&_Jv_shortClass, "short", 'S', 2);
1474 _Jv_InitPrimClass (&_Jv_intClass, "int", 'I', 4);
1475 _Jv_InitPrimClass (&_Jv_longClass, "long", 'J', 8);
1476 _Jv_InitPrimClass (&_Jv_booleanClass, "boolean", 'Z', 1);
1477 _Jv_InitPrimClass (&_Jv_charClass, "char", 'C', 2);
1478 _Jv_InitPrimClass (&_Jv_floatClass, "float", 'F', 4);
1479 _Jv_InitPrimClass (&_Jv_doubleClass, "double", 'D', 8);
1480 _Jv_InitPrimClass (&_Jv_voidClass, "void", 'V', 0);
1482 // We have to initialize this fairly early, to avoid circular class
1483 // initialization. In particular we want to start the
1484 // initialization of ClassLoader before we start the initialization
1485 // of VMClassLoader.
1486 _Jv_InitClass (&java::lang::ClassLoader::class$);
1488 // Set up the system class loader and the bootstrap class loader.
1489 gnu::gcj::runtime::ExtensionClassLoader::initialize();
1490 java::lang::VMClassLoader::initialize(JvNewStringLatin1(TOOLEXECLIBDIR));
1492 _Jv_RegisterBootstrapPackages();
1494 no_memory = new java::lang::OutOfMemoryError;
1497 LTDL_SET_PRELOADED_SYMBOLS ();
1500 _Jv_platform_initialize ();
1505 _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady);
1507 // Start the GC finalizer thread. A VirtualMachineError can be
1508 // thrown by the runtime if, say, threads aren't available.
1511 using namespace gnu::gcj::runtime;
1512 FinalizerThread *ft = new FinalizerThread ();
1515 catch (java::lang::VirtualMachineError *ignore)
1519 runtimeInitialized = true;
1525 _Jv_RunMain (JvVMInitArgs *vm_args, jclass klass, const char *name, int argc,
1526 const char **argv, bool is_jar)
1528 #ifndef DISABLE_MAIN_ARGS
1529 _Jv_SetArgs (argc, argv);
1532 java::lang::Runtime *runtime = NULL;
1536 if (_Jv_CreateJavaVM (vm_args) < 0)
1538 fprintf (stderr, "libgcj: couldn't create virtual machine\n");
1542 if (vm_args == NULL)
1543 gcj::vmArgs = JvConvertArgv(0, NULL);
1546 const char* vmArgs[vm_args->nOptions];
1547 const char** vmPtr = vmArgs;
1548 struct _Jv_VMOption* optionPtr = vm_args->options;
1549 for (int i = 0; i < vm_args->nOptions; ++i)
1550 *vmPtr++ = (*optionPtr++).optionString;
1551 gcj::vmArgs = JvConvertArgv(vm_args->nOptions, vmArgs);
1554 // Get the Runtime here. We want to initialize it before searching
1555 // for `main'; that way it will be set up if `main' is a JNI method.
1556 runtime = java::lang::Runtime::getRuntime ();
1558 #ifdef DISABLE_MAIN_ARGS
1559 arg_vec = JvConvertArgv (0, 0);
1561 arg_vec = JvConvertArgv (argc - 1, argv + 1);
1564 using namespace gnu::java::lang;
1566 main_thread = new MainThread (klass, arg_vec);
1568 main_thread = new MainThread (JvNewStringUTF (name),
1570 _Jv_AttachCurrentThread (main_thread);
1575 using namespace gnu::classpath::jdwp;
1576 VMVirtualMachine::initialize ();
1577 Jdwp *jdwp = new Jdwp ();
1578 jdwp->setDaemon (true);
1579 jdwp->configure (JvNewStringLatin1 (jdwpOptions));
1582 // Wait for JDWP to initialize and start
1587 gnu::classpath::jdwp::event::VmInitEvent *event;
1588 event = new gnu::classpath::jdwp::event::VmInitEvent (main_thread);
1589 gnu::classpath::jdwp::Jdwp::notify (event);
1591 catch (java::lang::Throwable *t)
1593 java::lang::System::err->println (JvNewStringLatin1
1594 ("Exception during runtime initialization"));
1595 t->printStackTrace();
1597 java::lang::Runtime::exitNoChecksAccessor (1);
1598 // In case the runtime creation failed.
1602 _Jv_ThreadRun (main_thread);
1604 // Notify debugger of VM's death
1605 if (gnu::classpath::jdwp::Jdwp::isDebugging)
1607 using namespace gnu::classpath::jdwp;
1608 event::VmDeathEvent *event = new event::VmDeathEvent ();
1609 Jdwp::notify (event);
1612 // If we got here then something went wrong, as MainThread is not
1613 // supposed to terminate.
1618 _Jv_RunMain (jclass klass, const char *name, int argc, const char **argv,
1621 _Jv_RunMain (NULL, klass, name, argc, argv, is_jar);
1625 JvRunMain (jclass klass, int argc, const char **argv)
1627 _Jv_RunMain (klass, NULL, argc, argv, false);
1631 JvRunMainName (const char *name, int argc, const char **argv)
1633 _Jv_RunMain (NULL, name, argc, argv, false);
1638 // Parse a string and return a heap size.
1640 parse_memory_size (const char *spec)
1643 unsigned long val = strtoul (spec, &end, 10);
1644 if (*end == 'k' || *end == 'K')
1646 else if (*end == 'm' || *end == 'M')
1648 return (size_t) val;
1651 // Set the initial heap size. This might be ignored by the GC layer.
1652 // This must be called before _Jv_RunMain.
1654 _Jv_SetInitialHeapSize (const char *arg)
1656 size_t size = parse_memory_size (arg);
1657 _Jv_GCSetInitialHeapSize (size);
1660 // Set the maximum heap size. This might be ignored by the GC layer.
1661 // This must be called before _Jv_RunMain.
1663 _Jv_SetMaximumHeapSize (const char *arg)
1665 size_t size = parse_memory_size (arg);
1666 _Jv_GCSetMaximumHeapSize (size);
1670 _Jv_SetStackSize (const char *arg)
1672 size_t size = parse_memory_size (arg);
1673 gcj::stack_size = size;
1677 _Jv_Malloc (jsize size)
1679 if (__builtin_expect (size == 0, false))
1681 void *ptr = malloc ((size_t) size);
1682 if (__builtin_expect (ptr == NULL, false))
1688 _Jv_Realloc (void *ptr, jsize size)
1690 if (__builtin_expect (size == 0, false))
1692 ptr = realloc (ptr, (size_t) size);
1693 if (__builtin_expect (ptr == NULL, false))
1699 _Jv_MallocUnchecked (jsize size)
1701 if (__builtin_expect (size == 0, false))
1703 return malloc ((size_t) size);
1707 _Jv_Free (void* ptr)
1714 // In theory, these routines can be #ifdef'd away on machines which
1715 // support divide overflow signals. However, we never know if some
1716 // code might have been compiled with "-fuse-divide-subroutine", so we
1717 // always include them in libgcj.
1720 _Jv_divI (jint dividend, jint divisor)
1722 if (__builtin_expect (divisor == 0, false))
1724 java::lang::ArithmeticException *arithexception
1725 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1726 throw arithexception;
1729 if (dividend == (jint) 0x80000000L && divisor == -1)
1732 return dividend / divisor;
1736 _Jv_remI (jint dividend, jint divisor)
1738 if (__builtin_expect (divisor == 0, false))
1740 java::lang::ArithmeticException *arithexception
1741 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1742 throw arithexception;
1745 if (dividend == (jint) 0x80000000L && divisor == -1)
1748 return dividend % divisor;
1752 _Jv_divJ (jlong dividend, jlong divisor)
1754 if (__builtin_expect (divisor == 0, false))
1756 java::lang::ArithmeticException *arithexception
1757 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1758 throw arithexception;
1761 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1764 return dividend / divisor;
1768 _Jv_remJ (jlong dividend, jlong divisor)
1770 if (__builtin_expect (divisor == 0, false))
1772 java::lang::ArithmeticException *arithexception
1773 = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
1774 throw arithexception;
1777 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1780 return dividend % divisor;
1785 // Return true if SELF_KLASS can access a field or method in
1786 // OTHER_KLASS. The field or method's access flags are specified in
1789 _Jv_CheckAccess (jclass self_klass, jclass other_klass, jint flags)
1791 using namespace java::lang::reflect;
1792 return ((self_klass == other_klass)
1793 || ((flags & Modifier::PUBLIC) != 0)
1794 || (((flags & Modifier::PROTECTED) != 0)
1795 && _Jv_IsAssignableFromSlow (self_klass, other_klass))
1796 || (((flags & Modifier::PRIVATE) == 0)
1797 && _Jv_ClassNameSamePackage (self_klass->name,
1798 other_klass->name)));
1801 // Prepend GCJ_VERSIONED_LIBDIR to a module search path stored in a C
1802 // char array, if the path is not already prefixed by
1803 // GCJ_VERSIONED_LIBDIR. Return a newly JvMalloc'd char buffer. The
1804 // result should be freed using JvFree.
1806 _Jv_PrependVersionedLibdir (char* libpath)
1810 if (libpath && libpath[0] != '\0')
1812 if (! strncmp (libpath,
1813 GCJ_VERSIONED_LIBDIR,
1814 sizeof (GCJ_VERSIONED_LIBDIR) - 1))
1816 // LD_LIBRARY_PATH is already prefixed with
1817 // GCJ_VERSIONED_LIBDIR.
1818 retval = (char*) _Jv_Malloc (strlen (libpath) + 1);
1819 strcpy (retval, libpath);
1823 // LD_LIBRARY_PATH is not prefixed with
1824 // GCJ_VERSIONED_LIBDIR.
1826 path_sep[0] = (char) _Jv_platform_path_separator;
1828 jsize total = ((sizeof (GCJ_VERSIONED_LIBDIR) - 1)
1829 + 1 /* path separator */ + strlen (libpath) + 1);
1830 retval = (char*) _Jv_Malloc (total);
1831 strcpy (retval, GCJ_VERSIONED_LIBDIR);
1832 strcat (retval, path_sep);
1833 strcat (retval, libpath);
1838 // LD_LIBRARY_PATH was not specified or is empty.
1839 retval = (char*) _Jv_Malloc (sizeof (GCJ_VERSIONED_LIBDIR));
1840 strcpy (retval, GCJ_VERSIONED_LIBDIR);