* arm.md (arm_buneq, arm_bltgt): put '\' before ';' in output
[official-gcc.git] / libjava / prims.cc
blob054290b16ad798e36e994641b748dfc603f52436
1 // prims.cc - Code for core of runtime environment.
3 /* Copyright (C) 1998, 1999, 2000, 2001, 2002 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
9 details. */
11 #include <config.h>
12 #include <platform.h>
14 #include <stdlib.h>
15 #include <stdarg.h>
16 #include <stdio.h>
17 #include <string.h>
18 #include <signal.h>
20 #ifdef HAVE_UNISTD_H
21 #include <unistd.h>
22 #endif
24 #include <gcj/cni.h>
25 #include <jvm.h>
26 #include <java-signal.h>
27 #include <java-threads.h>
29 #ifdef ENABLE_JVMPI
30 #include <jvmpi.h>
31 #include <java/lang/ThreadGroup.h>
32 #endif
34 #ifndef DISABLE_GETENV_PROPERTIES
35 #include <ctype.h>
36 #include <java-props.h>
37 #define PROCESS_GCJ_PROPERTIES process_gcj_properties()
38 #else
39 #define PROCESS_GCJ_PROPERTIES
40 #endif // DISABLE_GETENV_PROPERTIES
42 #include <java/lang/Class.h>
43 #include <java/lang/ClassLoader.h>
44 #include <java/lang/Runtime.h>
45 #include <java/lang/String.h>
46 #include <java/lang/Thread.h>
47 #include <java/lang/ThreadGroup.h>
48 #include <java/lang/ArrayIndexOutOfBoundsException.h>
49 #include <java/lang/ArithmeticException.h>
50 #include <java/lang/ClassFormatError.h>
51 #include <java/lang/InternalError.h>
52 #include <java/lang/NegativeArraySizeException.h>
53 #include <java/lang/NullPointerException.h>
54 #include <java/lang/OutOfMemoryError.h>
55 #include <java/lang/System.h>
56 #include <java/lang/reflect/Modifier.h>
57 #include <java/io/PrintStream.h>
58 #include <java/lang/UnsatisfiedLinkError.h>
59 #include <java/lang/VirtualMachineError.h>
60 #include <gnu/gcj/runtime/VMClassLoader.h>
61 #include <gnu/gcj/runtime/FinalizerThread.h>
62 #include <gnu/gcj/runtime/FirstThread.h>
64 #ifdef USE_LTDL
65 #include <ltdl.h>
66 #endif
68 // We allocate a single OutOfMemoryError exception which we keep
69 // around for use if we run out of memory.
70 static java::lang::OutOfMemoryError *no_memory;
72 // Largest representable size_t.
73 #define SIZE_T_MAX ((size_t) (~ (size_t) 0))
75 static const char *no_properties[] = { NULL };
77 // Properties set at compile time.
78 const char **_Jv_Compiler_Properties = no_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;
86 #endif
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;
93 int _Jv_argc;
95 #ifdef ENABLE_JVMPI
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);
100 #endif
103 extern "C" void _Jv_ThrowSignal (jthrowable) __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.
108 void
109 _Jv_ThrowSignal (jthrowable throwable)
111 throwable->fillInStackTrace ();
112 throw throwable;
115 #ifdef HANDLE_SEGV
116 static java::lang::NullPointerException *nullp;
118 SIGNAL_HANDLER (catch_segv)
120 MAKE_THROW_FRAME (nullp);
121 _Jv_ThrowSignal (nullp);
123 #endif
125 static java::lang::ArithmeticException *arithexception;
127 #ifdef HANDLE_FPE
128 SIGNAL_HANDLER (catch_fpe)
130 #ifdef HANDLE_DIVIDE_OVERFLOW
131 HANDLE_DIVIDE_OVERFLOW;
132 #else
133 MAKE_THROW_FRAME (arithexception);
134 #endif
135 _Jv_ThrowSignal (arithexception);
137 #endif
141 jboolean
142 _Jv_equalUtf8Consts (Utf8Const* a, Utf8Const *b)
144 int len;
145 _Jv_ushort *aptr, *bptr;
146 if (a == b)
147 return true;
148 if (a->hash != b->hash)
149 return false;
150 len = a->length;
151 if (b->length != len)
152 return false;
153 aptr = (_Jv_ushort *)a->data;
154 bptr = (_Jv_ushort *)b->data;
155 len = (len + 1) >> 1;
156 while (--len >= 0)
157 if (*aptr++ != *bptr++)
158 return false;
159 return true;
162 /* True iff A is equal to STR.
163 HASH is STR->hashCode().
166 jboolean
167 _Jv_equal (Utf8Const* a, jstring str, jint hash)
169 if (a->hash != (_Jv_ushort) hash)
170 return false;
171 jint len = str->length();
172 jint i = 0;
173 jchar *sptr = _Jv_GetStringChars (str);
174 unsigned char* ptr = (unsigned char*) a->data;
175 unsigned char* limit = ptr + a->length;
176 for (;; i++, sptr++)
178 int ch = UTF8_GET (ptr, limit);
179 if (i == len)
180 return ch < 0;
181 if (ch != *sptr)
182 return false;
184 return true;
187 /* Like _Jv_equal, but stop after N characters. */
188 jboolean
189 _Jv_equaln (Utf8Const *a, jstring str, jint n)
191 jint len = str->length();
192 jint i = 0;
193 jchar *sptr = _Jv_GetStringChars (str);
194 unsigned char* ptr = (unsigned char*) a->data;
195 unsigned char* limit = ptr + a->length;
196 for (; n-- > 0; i++, sptr++)
198 int ch = UTF8_GET (ptr, limit);
199 if (i == len)
200 return ch < 0;
201 if (ch != *sptr)
202 return false;
204 return true;
207 /* Count the number of Unicode chars encoded in a given Ut8 string. */
209 _Jv_strLengthUtf8(char* str, int len)
211 unsigned char* ptr;
212 unsigned char* limit;
213 int str_length;
215 ptr = (unsigned char*) str;
216 limit = ptr + len;
217 str_length = 0;
218 for (; ptr < limit; str_length++)
220 if (UTF8_GET (ptr, limit) < 0)
221 return (-1);
223 return (str_length);
226 /* Calculate a hash value for a string encoded in Utf8 format.
227 * This returns the same hash value as specified or java.lang.String.hashCode.
229 static jint
230 hashUtf8String (char* str, int len)
232 unsigned char* ptr = (unsigned char*) str;
233 unsigned char* limit = ptr + len;
234 jint hash = 0;
236 for (; ptr < limit;)
238 int ch = UTF8_GET (ptr, limit);
239 /* Updated specification from
240 http://www.javasoft.com/docs/books/jls/clarify.html. */
241 hash = (31 * hash) + ch;
243 return hash;
246 _Jv_Utf8Const *
247 _Jv_makeUtf8Const (char* s, int len)
249 if (len < 0)
250 len = strlen (s);
251 Utf8Const* m = (Utf8Const*) _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
252 memcpy (m->data, s, len);
253 m->data[len] = 0;
254 m->length = len;
255 m->hash = hashUtf8String (s, len) & 0xFFFF;
256 return (m);
259 _Jv_Utf8Const *
260 _Jv_makeUtf8Const (jstring string)
262 jint hash = string->hashCode ();
263 jint len = _Jv_GetStringUTFLength (string);
265 Utf8Const* m = (Utf8Const*)
266 _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
268 m->hash = hash;
269 m->length = len;
271 _Jv_GetStringUTFRegion (string, 0, string->length (), m->data);
272 m->data[len] = 0;
274 return m;
279 #ifdef DEBUG
280 void
281 _Jv_Abort (const char *function, const char *file, int line,
282 const char *message)
283 #else
284 void
285 _Jv_Abort (const char *, const char *, int, const char *message)
286 #endif
288 #ifdef DEBUG
289 fprintf (stderr,
290 "libgcj failure: %s\n in function %s, file %s, line %d\n",
291 message, function, file, line);
292 #else
293 fprintf (stderr, "libgcj failure: %s\n", message);
294 #endif
295 abort ();
298 static void
299 fail_on_finalization (jobject)
301 JvFail ("object was finalized");
304 void
305 _Jv_GCWatch (jobject obj)
307 _Jv_RegisterFinalizer (obj, fail_on_finalization);
310 void
311 _Jv_ThrowBadArrayIndex(jint bad_index)
313 throw new java::lang::ArrayIndexOutOfBoundsException
314 (java::lang::String::valueOf (bad_index));
317 void
318 _Jv_ThrowNullPointerException ()
320 throw new java::lang::NullPointerException;
323 // Explicitly throw a no memory exception.
324 // The collector calls this when it encounters an out-of-memory condition.
325 void _Jv_ThrowNoMemory()
327 throw no_memory;
330 #ifdef ENABLE_JVMPI
331 static void
332 jvmpi_notify_alloc(jclass klass, jint size, jobject obj)
334 // Service JVMPI allocation request.
335 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
337 JVMPI_Event event;
339 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
340 event.env_id = NULL;
341 event.u.obj_alloc.arena_id = 0;
342 event.u.obj_alloc.class_id = (jobjectID) klass;
343 event.u.obj_alloc.is_array = 0;
344 event.u.obj_alloc.size = size;
345 event.u.obj_alloc.obj_id = (jobjectID) obj;
347 // FIXME: This doesn't look right for the Boehm GC. A GC may
348 // already be in progress. _Jv_DisableGC () doesn't wait for it.
349 // More importantly, I don't see the need for disabling GC, since we
350 // blatantly have a pointer to obj on our stack, ensuring that the
351 // object can't be collected. Even for a nonconservative collector,
352 // it appears to me that this must be true, since we are about to
353 // return obj. Isn't this whole approach way too intrusive for
354 // a useful profiling interface? - HB
355 _Jv_DisableGC ();
356 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
357 _Jv_EnableGC ();
360 #else /* !ENABLE_JVMPI */
361 # define jvmpi_notify_alloc(klass,size,obj) /* do nothing */
362 #endif
364 // Allocate a new object of class KLASS. SIZE is the size of the object
365 // to allocate. You might think this is redundant, but it isn't; some
366 // classes, such as String, aren't of fixed size.
367 // First a version that assumes that we have no finalizer, and that
368 // the class is already initialized.
369 // If we know that JVMPI is disabled, this can be replaced by a direct call
370 // to the allocator for the appropriate GC.
371 jobject
372 _Jv_AllocObjectNoInitNoFinalizer (jclass klass, jint size)
374 jobject obj = (jobject) _Jv_AllocObj (size, klass);
375 jvmpi_notify_alloc (klass, size, obj);
376 return obj;
379 // And now a version that initializes if necessary.
380 jobject
381 _Jv_AllocObjectNoFinalizer (jclass klass, jint size)
383 _Jv_InitClass (klass);
384 jobject obj = (jobject) _Jv_AllocObj (size, klass);
385 jvmpi_notify_alloc (klass, size, obj);
386 return obj;
389 // And now the general version that registers a finalizer if necessary.
390 jobject
391 _Jv_AllocObject (jclass klass, jint size)
393 jobject obj = _Jv_AllocObjectNoFinalizer (klass, size);
395 // We assume that the compiler only generates calls to this routine
396 // if there really is an interesting finalizer.
397 // Unfortunately, we still have to the dynamic test, since there may
398 // be cni calls to this routine.
399 // Nore that on IA64 get_finalizer() returns the starting address of the
400 // function, not a function pointer. Thus this still works.
401 if (klass->vtable->get_finalizer ()
402 != java::lang::Object::class$.vtable->get_finalizer ())
403 _Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
404 return obj;
407 // A version of the above that assumes the object contains no pointers,
408 // and requires no finalization. This can't happen if we need pointers
409 // to locks.
410 #ifdef JV_HASH_SYNCHRONIZATION
411 jobject
412 _Jv_AllocPtrFreeObject (jclass klass, jint size)
414 _Jv_InitClass (klass);
416 jobject obj = (jobject) _Jv_AllocPtrFreeObj (size, klass);
418 #ifdef ENABLE_JVMPI
419 // Service JVMPI request.
421 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
423 JVMPI_Event event;
425 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
426 event.env_id = NULL;
427 event.u.obj_alloc.arena_id = 0;
428 event.u.obj_alloc.class_id = (jobjectID) klass;
429 event.u.obj_alloc.is_array = 0;
430 event.u.obj_alloc.size = size;
431 event.u.obj_alloc.obj_id = (jobjectID) obj;
433 _Jv_DisableGC ();
434 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
435 _Jv_EnableGC ();
437 #endif
439 return obj;
441 #endif /* JV_HASH_SYNCHRONIZATION */
444 // Allocate a new array of Java objects. Each object is of type
445 // `elementClass'. `init' is used to initialize each slot in the
446 // array.
447 jobjectArray
448 _Jv_NewObjectArray (jsize count, jclass elementClass, jobject init)
450 if (__builtin_expect (count < 0, false))
451 throw new java::lang::NegativeArraySizeException;
453 JvAssert (! elementClass->isPrimitive ());
455 // Ensure that elements pointer is properly aligned.
456 jobjectArray obj = NULL;
457 size_t size = (size_t) elements (obj);
458 size += count * sizeof (jobject);
460 // FIXME: second argument should be "current loader"
461 jclass klass = _Jv_GetArrayClass (elementClass, 0);
463 obj = (jobjectArray) _Jv_AllocArray (size, klass);
464 // Cast away const.
465 jsize *lp = const_cast<jsize *> (&obj->length);
466 *lp = count;
467 // We know the allocator returns zeroed memory. So don't bother
468 // zeroing it again.
469 if (init)
471 jobject *ptr = elements(obj);
472 while (--count >= 0)
473 *ptr++ = init;
475 return obj;
478 // Allocate a new array of primitives. ELTYPE is the type of the
479 // element, COUNT is the size of the array.
480 jobject
481 _Jv_NewPrimArray (jclass eltype, jint count)
483 int elsize = eltype->size();
484 if (__builtin_expect (count < 0, false))
485 throw new java::lang::NegativeArraySizeException;
487 JvAssert (eltype->isPrimitive ());
488 jobject dummy = NULL;
489 size_t size = (size_t) _Jv_GetArrayElementFromElementType (dummy, eltype);
491 // Check for overflow.
492 if (__builtin_expect ((size_t) count >
493 (SIZE_T_MAX - size) / elsize, false))
494 throw no_memory;
496 jclass klass = _Jv_GetArrayClass (eltype, 0);
498 # ifdef JV_HASH_SYNCHRONIZATION
499 // Since the vtable is always statically allocated,
500 // these are completely pointerfree! Make sure the GC doesn't touch them.
501 __JArray *arr =
502 (__JArray*) _Jv_AllocPtrFreeObj (size + elsize * count, klass);
503 memset((char *)arr + size, 0, elsize * count);
504 # else
505 __JArray *arr = (__JArray*) _Jv_AllocObj (size + elsize * count, klass);
506 // Note that we assume we are given zeroed memory by the allocator.
507 # endif
508 // Cast away const.
509 jsize *lp = const_cast<jsize *> (&arr->length);
510 *lp = count;
512 return arr;
515 jobject
516 _Jv_NewArray (jint type, jint size)
518 switch (type)
520 case 4: return JvNewBooleanArray (size);
521 case 5: return JvNewCharArray (size);
522 case 6: return JvNewFloatArray (size);
523 case 7: return JvNewDoubleArray (size);
524 case 8: return JvNewByteArray (size);
525 case 9: return JvNewShortArray (size);
526 case 10: return JvNewIntArray (size);
527 case 11: return JvNewLongArray (size);
529 throw new java::lang::InternalError
530 (JvNewStringLatin1 ("invalid type code in _Jv_NewArray"));
533 // Allocate a possibly multi-dimensional array but don't check that
534 // any array length is <0.
535 static jobject
536 _Jv_NewMultiArrayUnchecked (jclass type, jint dimensions, jint *sizes)
538 JvAssert (type->isArray());
539 jclass element_type = type->getComponentType();
540 jobject result;
541 if (element_type->isPrimitive())
542 result = _Jv_NewPrimArray (element_type, sizes[0]);
543 else
544 result = _Jv_NewObjectArray (sizes[0], element_type, NULL);
546 if (dimensions > 1)
548 JvAssert (! element_type->isPrimitive());
549 JvAssert (element_type->isArray());
550 jobject *contents = elements ((jobjectArray) result);
551 for (int i = 0; i < sizes[0]; ++i)
552 contents[i] = _Jv_NewMultiArrayUnchecked (element_type, dimensions - 1,
553 sizes + 1);
556 return result;
559 jobject
560 _Jv_NewMultiArray (jclass type, jint dimensions, jint *sizes)
562 for (int i = 0; i < dimensions; ++i)
563 if (sizes[i] < 0)
564 throw new java::lang::NegativeArraySizeException;
566 return _Jv_NewMultiArrayUnchecked (type, dimensions, sizes);
569 jobject
570 _Jv_NewMultiArray (jclass array_type, jint dimensions, ...)
572 va_list args;
573 jint sizes[dimensions];
574 va_start (args, dimensions);
575 for (int i = 0; i < dimensions; ++i)
577 jint size = va_arg (args, jint);
578 if (size < 0)
579 throw new java::lang::NegativeArraySizeException;
580 sizes[i] = size;
582 va_end (args);
584 return _Jv_NewMultiArrayUnchecked (array_type, dimensions, sizes);
589 // Ensure 8-byte alignment, for hash synchronization.
590 #define DECLARE_PRIM_TYPE(NAME) \
591 _Jv_ArrayVTable _Jv_##NAME##VTable; \
592 java::lang::Class _Jv_##NAME##Class __attribute__ ((aligned (8)));
594 DECLARE_PRIM_TYPE(byte);
595 DECLARE_PRIM_TYPE(short);
596 DECLARE_PRIM_TYPE(int);
597 DECLARE_PRIM_TYPE(long);
598 DECLARE_PRIM_TYPE(boolean);
599 DECLARE_PRIM_TYPE(char);
600 DECLARE_PRIM_TYPE(float);
601 DECLARE_PRIM_TYPE(double);
602 DECLARE_PRIM_TYPE(void);
604 void
605 _Jv_InitPrimClass (jclass cl, char *cname, char sig, int len,
606 _Jv_ArrayVTable *array_vtable)
608 using namespace java::lang::reflect;
610 _Jv_InitNewClassFields (cl);
612 // We must set the vtable for the class; the Java constructor
613 // doesn't do this.
614 (*(_Jv_VTable **) cl) = java::lang::Class::class$.vtable;
616 // Initialize the fields we care about. We do this in the same
617 // order they are declared in Class.h.
618 cl->name = _Jv_makeUtf8Const ((char *) cname, -1);
619 cl->accflags = Modifier::PUBLIC | Modifier::FINAL | Modifier::ABSTRACT;
620 cl->method_count = sig;
621 cl->size_in_bytes = len;
622 cl->vtable = JV_PRIMITIVE_VTABLE;
623 cl->state = JV_STATE_DONE;
624 cl->depth = -1;
625 if (sig != 'V')
626 _Jv_NewArrayClass (cl, NULL, (_Jv_VTable *) array_vtable);
629 jclass
630 _Jv_FindClassFromSignature (char *sig, java::lang::ClassLoader *loader)
632 switch (*sig)
634 case 'B':
635 return JvPrimClass (byte);
636 case 'S':
637 return JvPrimClass (short);
638 case 'I':
639 return JvPrimClass (int);
640 case 'J':
641 return JvPrimClass (long);
642 case 'Z':
643 return JvPrimClass (boolean);
644 case 'C':
645 return JvPrimClass (char);
646 case 'F':
647 return JvPrimClass (float);
648 case 'D':
649 return JvPrimClass (double);
650 case 'V':
651 return JvPrimClass (void);
652 case 'L':
654 int i;
655 for (i = 1; sig[i] && sig[i] != ';'; ++i)
657 _Jv_Utf8Const *name = _Jv_makeUtf8Const (&sig[1], i - 1);
658 return _Jv_FindClass (name, loader);
661 case '[':
663 jclass klass = _Jv_FindClassFromSignature (&sig[1], loader);
664 if (! klass)
665 return NULL;
666 return _Jv_GetArrayClass (klass, loader);
670 return NULL; // Placate compiler.
675 JArray<jstring> *
676 JvConvertArgv (int argc, const char **argv)
678 if (argc < 0)
679 argc = 0;
680 jobjectArray ar = JvNewObjectArray(argc, &StringClass, NULL);
681 jobject *ptr = elements(ar);
682 jbyteArray bytes = NULL;
683 for (int i = 0; i < argc; i++)
685 const char *arg = argv[i];
686 int len = strlen (arg);
687 if (bytes == NULL || bytes->length < len)
688 bytes = JvNewByteArray (len);
689 jbyte *bytePtr = elements (bytes);
690 // We assume jbyte == char.
691 memcpy (bytePtr, arg, len);
693 // Now convert using the default encoding.
694 *ptr++ = new java::lang::String (bytes, 0, len);
696 return (JArray<jstring>*) ar;
699 // FIXME: These variables are static so that they will be
700 // automatically scanned by the Boehm collector. This is needed
701 // because with qthreads the collector won't scan the initial stack --
702 // it will only scan the qthreads stacks.
704 // Command line arguments.
705 static JArray<jstring> *arg_vec;
707 // The primary thread.
708 static java::lang::Thread *main_thread;
710 char *
711 _Jv_ThisExecutable (void)
713 return _Jv_execName;
716 void
717 _Jv_ThisExecutable (const char *name)
719 if (name)
721 _Jv_execName = (char *) _Jv_Malloc (strlen (name) + 1);
722 strcpy (_Jv_execName, name);
726 #ifndef DISABLE_GETENV_PROPERTIES
728 static char *
729 next_property_key (char *s, size_t *length)
731 size_t l = 0;
733 JvAssert (s);
735 // Skip over whitespace
736 while (isspace (*s))
737 s++;
739 // If we've reached the end, return NULL. Also return NULL if for
740 // some reason we've come across a malformed property string.
741 if (*s == 0
742 || *s == ':'
743 || *s == '=')
744 return NULL;
746 // Determine the length of the property key.
747 while (s[l] != 0
748 && ! isspace (s[l])
749 && s[l] != ':'
750 && s[l] != '=')
752 if (s[l] == '\\'
753 && s[l+1] != 0)
754 l++;
755 l++;
758 *length = l;
760 return s;
763 static char *
764 next_property_value (char *s, size_t *length)
766 size_t l = 0;
768 JvAssert (s);
770 while (isspace (*s))
771 s++;
773 if (*s == ':'
774 || *s == '=')
775 s++;
777 while (isspace (*s))
778 s++;
780 // If we've reached the end, return NULL.
781 if (*s == 0)
782 return NULL;
784 // Determine the length of the property value.
785 while (s[l] != 0
786 && ! isspace (s[l])
787 && s[l] != ':'
788 && s[l] != '=')
790 if (s[l] == '\\'
791 && s[l+1] != 0)
792 l += 2;
793 else
794 l++;
797 *length = l;
799 return s;
802 static void
803 process_gcj_properties ()
805 char *props = getenv("GCJ_PROPERTIES");
806 char *p = props;
807 size_t length;
808 size_t property_count = 0;
810 if (NULL == props)
811 return;
813 // Whip through props quickly in order to count the number of
814 // property values.
815 while (p && (p = next_property_key (p, &length)))
817 // Skip to the end of the key
818 p += length;
820 p = next_property_value (p, &length);
821 if (p)
822 p += length;
824 property_count++;
827 // Allocate an array of property value/key pairs.
828 _Jv_Environment_Properties =
829 (property_pair *) malloc (sizeof(property_pair)
830 * (property_count + 1));
832 // Go through the properties again, initializing _Jv_Properties
833 // along the way.
834 p = props;
835 property_count = 0;
836 while (p && (p = next_property_key (p, &length)))
838 _Jv_Environment_Properties[property_count].key = p;
839 _Jv_Environment_Properties[property_count].key_length = length;
841 // Skip to the end of the key
842 p += length;
844 p = next_property_value (p, &length);
846 _Jv_Environment_Properties[property_count].value = p;
847 _Jv_Environment_Properties[property_count].value_length = length;
849 if (p)
850 p += length;
852 property_count++;
854 memset ((void *) &_Jv_Environment_Properties[property_count],
855 0, sizeof (property_pair));
857 size_t i = 0;
859 // Null terminate the strings.
860 while (_Jv_Environment_Properties[i].key)
862 _Jv_Environment_Properties[i].key[_Jv_Environment_Properties[i].key_length] = 0;
863 _Jv_Environment_Properties[i++].value[_Jv_Environment_Properties[i].value_length] = 0;
867 #endif // DISABLE_GETENV_PROPERTIES
869 namespace gcj
871 _Jv_Utf8Const *void_signature;
872 _Jv_Utf8Const *clinit_name;
873 _Jv_Utf8Const *init_name;
874 _Jv_Utf8Const *finit_name;
876 bool runtimeInitialized = false;
879 jint
880 _Jv_CreateJavaVM (void* /*vm_args*/)
882 using namespace gcj;
884 if (runtimeInitialized)
885 return -1;
887 runtimeInitialized = true;
889 PROCESS_GCJ_PROPERTIES;
891 _Jv_InitThreads ();
892 _Jv_InitGC ();
893 _Jv_InitializeSyncMutex ();
895 /* Initialize Utf8 constants declared in jvm.h. */
896 void_signature = _Jv_makeUtf8Const ("()V", 3);
897 clinit_name = _Jv_makeUtf8Const ("<clinit>", 8);
898 init_name = _Jv_makeUtf8Const ("<init>", 6);
899 finit_name = _Jv_makeUtf8Const ("finit$", 6);
901 /* Initialize built-in classes to represent primitive TYPEs. */
902 _Jv_InitPrimClass (&_Jv_byteClass, "byte", 'B', 1, &_Jv_byteVTable);
903 _Jv_InitPrimClass (&_Jv_shortClass, "short", 'S', 2, &_Jv_shortVTable);
904 _Jv_InitPrimClass (&_Jv_intClass, "int", 'I', 4, &_Jv_intVTable);
905 _Jv_InitPrimClass (&_Jv_longClass, "long", 'J', 8, &_Jv_longVTable);
906 _Jv_InitPrimClass (&_Jv_booleanClass, "boolean", 'Z', 1, &_Jv_booleanVTable);
907 _Jv_InitPrimClass (&_Jv_charClass, "char", 'C', 2, &_Jv_charVTable);
908 _Jv_InitPrimClass (&_Jv_floatClass, "float", 'F', 4, &_Jv_floatVTable);
909 _Jv_InitPrimClass (&_Jv_doubleClass, "double", 'D', 8, &_Jv_doubleVTable);
910 _Jv_InitPrimClass (&_Jv_voidClass, "void", 'V', 0, &_Jv_voidVTable);
912 // Turn stack trace generation off while creating exception objects.
913 _Jv_InitClass (&java::lang::Throwable::class$);
914 java::lang::Throwable::trace_enabled = 0;
916 INIT_SEGV;
917 #ifdef HANDLE_FPE
918 INIT_FPE;
919 #else
920 arithexception = new java::lang::ArithmeticException
921 (JvNewStringLatin1 ("/ by zero"));
922 #endif
924 no_memory = new java::lang::OutOfMemoryError;
926 java::lang::Throwable::trace_enabled = 1;
928 #ifdef USE_LTDL
929 LTDL_SET_PRELOADED_SYMBOLS ();
930 #endif
932 _Jv_platform_initialize ();
934 _Jv_JNI_Init ();
936 _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady);
938 // Start the GC finalizer thread. A VirtualMachineError can be
939 // thrown by the runtime if, say, threads aren't available. In this
940 // case finalizers simply won't run.
943 using namespace gnu::gcj::runtime;
944 FinalizerThread *ft = new FinalizerThread ();
945 ft->start ();
947 catch (java::lang::VirtualMachineError *ignore)
951 return 0;
954 void
955 _Jv_RunMain (jclass klass, const char *name, int argc, const char **argv,
956 bool is_jar)
958 _Jv_argv = argv;
959 _Jv_argc = argc;
961 java::lang::Runtime *runtime = NULL;
964 #ifdef DISABLE_MAIN_ARGS
965 _Jv_ThisExecutable ("[Embedded App]");
966 #else
967 #ifdef HAVE_PROC_SELF_EXE
968 char exec_name[20];
969 sprintf (exec_name, "/proc/%d/exe", getpid ());
970 _Jv_ThisExecutable (exec_name);
971 #else
972 _Jv_ThisExecutable (argv[0]);
973 #endif /* HAVE_PROC_SELF_EXE */
974 #endif /* DISABLE_MAIN_ARGS */
978 // Set this very early so that it is seen when java.lang.System
979 // is initialized.
980 if (is_jar)
981 _Jv_Jar_Class_Path = strdup (name);
982 _Jv_CreateJavaVM (NULL);
984 // Get the Runtime here. We want to initialize it before searching
985 // for `main'; that way it will be set up if `main' is a JNI method.
986 runtime = java::lang::Runtime::getRuntime ();
988 #ifdef DISABLE_MAIN_ARGS
989 arg_vec = JvConvertArgv (0, 0);
990 #else
991 arg_vec = JvConvertArgv (argc - 1, argv + 1);
992 #endif
994 using namespace gnu::gcj::runtime;
995 if (klass)
996 main_thread = new FirstThread (klass, arg_vec);
997 else
998 main_thread = new FirstThread (JvNewStringLatin1 (name),
999 arg_vec, is_jar);
1001 catch (java::lang::Throwable *t)
1003 java::lang::System::err->println (JvNewStringLatin1
1004 ("Exception during runtime initialization"));
1005 t->printStackTrace();
1006 runtime->exit (1);
1009 _Jv_AttachCurrentThread (main_thread);
1010 _Jv_ThreadRun (main_thread);
1011 _Jv_ThreadWait ();
1013 int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
1014 runtime->exit (status);
1017 void
1018 JvRunMain (jclass klass, int argc, const char **argv)
1020 _Jv_RunMain (klass, NULL, argc, argv, false);
1025 // Parse a string and return a heap size.
1026 static size_t
1027 parse_heap_size (const char *spec)
1029 char *end;
1030 unsigned long val = strtoul (spec, &end, 10);
1031 if (*end == 'k' || *end == 'K')
1032 val *= 1024;
1033 else if (*end == 'm' || *end == 'M')
1034 val *= 1048576;
1035 return (size_t) val;
1038 // Set the initial heap size. This might be ignored by the GC layer.
1039 // This must be called before _Jv_RunMain.
1040 void
1041 _Jv_SetInitialHeapSize (const char *arg)
1043 size_t size = parse_heap_size (arg);
1044 _Jv_GCSetInitialHeapSize (size);
1047 // Set the maximum heap size. This might be ignored by the GC layer.
1048 // This must be called before _Jv_RunMain.
1049 void
1050 _Jv_SetMaximumHeapSize (const char *arg)
1052 size_t size = parse_heap_size (arg);
1053 _Jv_GCSetMaximumHeapSize (size);
1058 void *
1059 _Jv_Malloc (jsize size)
1061 if (__builtin_expect (size == 0, false))
1062 size = 1;
1063 void *ptr = malloc ((size_t) size);
1064 if (__builtin_expect (ptr == NULL, false))
1065 throw no_memory;
1066 return ptr;
1069 void *
1070 _Jv_Realloc (void *ptr, jsize size)
1072 if (__builtin_expect (size == 0, false))
1073 size = 1;
1074 ptr = realloc (ptr, (size_t) size);
1075 if (__builtin_expect (ptr == NULL, false))
1076 throw no_memory;
1077 return ptr;
1080 void *
1081 _Jv_MallocUnchecked (jsize size)
1083 if (__builtin_expect (size == 0, false))
1084 size = 1;
1085 return malloc ((size_t) size);
1088 void
1089 _Jv_Free (void* ptr)
1091 return free (ptr);
1096 // In theory, these routines can be #ifdef'd away on machines which
1097 // support divide overflow signals. However, we never know if some
1098 // code might have been compiled with "-fuse-divide-subroutine", so we
1099 // always include them in libgcj.
1101 jint
1102 _Jv_divI (jint dividend, jint divisor)
1104 if (__builtin_expect (divisor == 0, false))
1105 _Jv_ThrowSignal (arithexception);
1107 if (dividend == (jint) 0x80000000L && divisor == -1)
1108 return dividend;
1110 return dividend / divisor;
1113 jint
1114 _Jv_remI (jint dividend, jint divisor)
1116 if (__builtin_expect (divisor == 0, false))
1117 _Jv_ThrowSignal (arithexception);
1119 if (dividend == (jint) 0x80000000L && divisor == -1)
1120 return 0;
1122 return dividend % divisor;
1125 jlong
1126 _Jv_divJ (jlong dividend, jlong divisor)
1128 if (__builtin_expect (divisor == 0, false))
1129 _Jv_ThrowSignal (arithexception);
1131 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1132 return dividend;
1134 return dividend / divisor;
1137 jlong
1138 _Jv_remJ (jlong dividend, jlong divisor)
1140 if (__builtin_expect (divisor == 0, false))
1141 _Jv_ThrowSignal (arithexception);
1143 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1144 return 0;
1146 return dividend % divisor;