* cppfiles.c (_cpp_execute_include): Move `len` initialisation
[official-gcc.git] / libjava / prims.cc
blobc4c7316dfcea2d3ce6030ff21ef4cfd48d370a54
1 // prims.cc - Code for core of runtime environment.
3 /* Copyright (C) 1998, 1999, 2000 Free Software Foundation
5 This file is part of libgcj.
7 This software is copyrighted work licensed under the terms of the
8 Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
9 details. */
11 #include <config.h>
13 #ifdef USE_WIN32_SIGNALLING
14 #include <windows.h>
15 #endif /* USE_WIN32_SIGNALLING */
17 #ifdef USE_WINSOCK
18 #undef __INSIDE_CYGWIN__
19 #include <winsock.h>
20 #endif /* USE_WINSOCK */
22 #include <stdlib.h>
23 #include <stdarg.h>
24 #include <stdio.h>
25 #include <string.h>
26 #include <signal.h>
28 #ifdef HAVE_UNISTD_H
29 #include <unistd.h>
30 #endif
32 #include <gcj/cni.h>
33 #include <jvm.h>
34 #include <java-signal.h>
35 #include <java-threads.h>
37 #ifdef ENABLE_JVMPI
38 #include <jvmpi.h>
39 #endif
41 #ifndef DISABLE_GETENV_PROPERTIES
42 #include <ctype.h>
43 #include <java-props.h>
44 #define PROCESS_GCJ_PROPERTIES process_gcj_properties()
45 #else
46 #define PROCESS_GCJ_PROPERTIES
47 #endif // DISABLE_GETENV_PROPERTIES
49 #include <java/lang/Class.h>
50 #include <java/lang/ClassLoader.h>
51 #include <java/lang/Runtime.h>
52 #include <java/lang/String.h>
53 #include <java/lang/Thread.h>
54 #include <java/lang/ThreadGroup.h>
55 #include <gnu/gcj/runtime/FirstThread.h>
56 #include <java/lang/ArrayIndexOutOfBoundsException.h>
57 #include <java/lang/ArithmeticException.h>
58 #include <java/lang/ClassFormatError.h>
59 #include <java/lang/NegativeArraySizeException.h>
60 #include <java/lang/NullPointerException.h>
61 #include <java/lang/OutOfMemoryError.h>
62 #include <java/lang/System.h>
63 #include <java/lang/reflect/Modifier.h>
64 #include <java/io/PrintStream.h>
66 #ifdef USE_LTDL
67 #include <ltdl.h>
68 #endif
70 // We allocate a single OutOfMemoryError exception which we keep
71 // around for use if we run out of memory.
72 static java::lang::OutOfMemoryError *no_memory;
74 // Largest representable size_t.
75 #define SIZE_T_MAX ((size_t) (~ (size_t) 0))
77 // Properties set at compile time.
78 const char **_Jv_Compiler_Properties;
80 // The JAR file to add to the beginning of java.class.path.
81 const char *_Jv_Jar_Class_Path;
83 #ifndef DISABLE_GETENV_PROPERTIES
84 // Property key/value pairs.
85 property_pair *_Jv_Environment_Properties;
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 (void *) __attribute ((noreturn));
105 // Just like _Jv_Throw, but fill in the stack trace first. Although
106 // this is declared extern in order that its name not be mangled, it
107 // is not intended to be used outside this file.
108 void
109 _Jv_ThrowSignal (void *e)
111 java::lang::Throwable *throwable = (java::lang::Throwable *)e;
112 throwable->fillInStackTrace ();
113 _Jv_Throw (throwable);
116 #ifdef HANDLE_SEGV
117 static java::lang::NullPointerException *nullp;
119 SIGNAL_HANDLER (catch_segv)
121 MAKE_THROW_FRAME (nullp);
122 _Jv_ThrowSignal (nullp);
124 #endif
126 static java::lang::ArithmeticException *arithexception;
128 #ifdef HANDLE_FPE
129 SIGNAL_HANDLER (catch_fpe)
131 #ifdef HANDLE_DIVIDE_OVERFLOW
132 HANDLE_DIVIDE_OVERFLOW;
133 #else
134 MAKE_THROW_FRAME (arithexception);
135 #endif
136 _Jv_ThrowSignal (arithexception);
138 #endif
142 jboolean
143 _Jv_equalUtf8Consts (Utf8Const* a, Utf8Const *b)
145 int len;
146 _Jv_ushort *aptr, *bptr;
147 if (a == b)
148 return true;
149 if (a->hash != b->hash)
150 return false;
151 len = a->length;
152 if (b->length != len)
153 return false;
154 aptr = (_Jv_ushort *)a->data;
155 bptr = (_Jv_ushort *)b->data;
156 len = (len + 1) >> 1;
157 while (--len >= 0)
158 if (*aptr++ != *bptr++)
159 return false;
160 return true;
163 /* True iff A is equal to STR.
164 HASH is STR->hashCode().
167 jboolean
168 _Jv_equal (Utf8Const* a, jstring str, jint hash)
170 if (a->hash != (_Jv_ushort) hash)
171 return false;
172 jint len = str->length();
173 jint i = 0;
174 jchar *sptr = _Jv_GetStringChars (str);
175 unsigned char* ptr = (unsigned char*) a->data;
176 unsigned char* limit = ptr + a->length;
177 for (;; i++, sptr++)
179 int ch = UTF8_GET (ptr, limit);
180 if (i == len)
181 return ch < 0;
182 if (ch != *sptr)
183 return false;
185 return true;
188 /* Like _Jv_equal, but stop after N characters. */
189 jboolean
190 _Jv_equaln (Utf8Const *a, jstring str, jint n)
192 jint len = str->length();
193 jint i = 0;
194 jchar *sptr = _Jv_GetStringChars (str);
195 unsigned char* ptr = (unsigned char*) a->data;
196 unsigned char* limit = ptr + a->length;
197 for (; n-- > 0; i++, sptr++)
199 int ch = UTF8_GET (ptr, limit);
200 if (i == len)
201 return ch < 0;
202 if (ch != *sptr)
203 return false;
205 return true;
208 /* Count the number of Unicode chars encoded in a given Ut8 string. */
210 _Jv_strLengthUtf8(char* str, int len)
212 unsigned char* ptr;
213 unsigned char* limit;
214 int str_length;
216 ptr = (unsigned char*) str;
217 limit = ptr + len;
218 str_length = 0;
219 for (; ptr < limit; str_length++) {
220 if (UTF8_GET (ptr, limit) < 0) {
221 return (-1);
224 return (str_length);
227 /* Calculate a hash value for a string encoded in Utf8 format.
228 * This returns the same hash value as specified or java.lang.String.hashCode.
230 static jint
231 hashUtf8String (char* str, int len)
233 unsigned char* ptr = (unsigned char*) str;
234 unsigned char* limit = ptr + len;
235 jint hash = 0;
237 for (; ptr < limit;)
239 int ch = UTF8_GET (ptr, limit);
240 /* Updated specification from
241 http://www.javasoft.com/docs/books/jls/clarify.html. */
242 hash = (31 * hash) + ch;
244 return hash;
247 _Jv_Utf8Const *
248 _Jv_makeUtf8Const (char* s, int len)
250 if (len < 0)
251 len = strlen (s);
252 Utf8Const* m = (Utf8Const*) _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
253 if (! m)
254 JvThrow (no_memory);
255 memcpy (m->data, s, len);
256 m->data[len] = 0;
257 m->length = len;
258 m->hash = hashUtf8String (s, len) & 0xFFFF;
259 return (m);
262 _Jv_Utf8Const *
263 _Jv_makeUtf8Const (jstring string)
265 jint hash = string->hashCode ();
266 jint len = _Jv_GetStringUTFLength (string);
268 Utf8Const* m = (Utf8Const*)
269 _Jv_AllocBytesChecked (sizeof(Utf8Const) + len + 1);
271 m->hash = hash;
272 m->length = len;
274 _Jv_GetStringUTFRegion (string, 0, string->length (), m->data);
275 m->data[len] = 0;
277 return m;
282 #ifdef DEBUG
283 void
284 _Jv_Abort (const char *function, const char *file, int line,
285 const char *message)
286 #else
287 void
288 _Jv_Abort (const char *, const char *, int, const char *message)
289 #endif
291 #ifdef DEBUG
292 fprintf (stderr,
293 "libgcj failure: %s\n in function %s, file %s, line %d\n",
294 message, function, file, line);
295 #else
296 java::io::PrintStream *err = java::lang::System::err;
297 err->print(JvNewStringLatin1 ("libgcj failure: "));
298 err->println(JvNewStringLatin1 (message));
299 err->flush();
300 #endif
301 abort ();
304 static void
305 fail_on_finalization (jobject)
307 JvFail ("object was finalized");
310 void
311 _Jv_GCWatch (jobject obj)
313 _Jv_RegisterFinalizer (obj, fail_on_finalization);
316 void
317 _Jv_ThrowBadArrayIndex(jint bad_index)
319 JvThrow (new java::lang::ArrayIndexOutOfBoundsException
320 (java::lang::String::valueOf(bad_index)));
323 void
324 _Jv_ThrowNullPointerException ()
326 throw new java::lang::NullPointerException ();
329 // Allocate some unscanned memory and throw an exception if no memory.
330 void *
331 _Jv_AllocBytesChecked (jsize size)
333 void *r = _Jv_AllocBytes (size);
334 if (! r)
335 _Jv_Throw (no_memory);
336 return r;
339 // Allocate a new object of class KLASS. SIZE is the size of the object
340 // to allocate. You might think this is redundant, but it isn't; some
341 // classes, such as String, aren't of fixed size.
342 jobject
343 _Jv_AllocObject (jclass klass, jint size)
345 _Jv_InitClass (klass);
347 jobject obj = (jobject) _Jv_AllocObj (size, klass);
348 if (__builtin_expect (! obj, false))
349 JvThrow (no_memory);
351 // If this class has inherited finalize from Object, then don't
352 // bother registering a finalizer. We know that finalize() is the
353 // very first method after the dummy entry. If this turns out to be
354 // unreliable, a more robust implementation can be written. Such an
355 // implementation would look for Object.finalize in Object's method
356 // table at startup, and then use that information to find the
357 // appropriate index in the method vector.
358 if (klass->vtable->get_finalizer()
359 != java::lang::Object::class$.vtable->get_finalizer())
360 _Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
362 #ifdef ENABLE_JVMPI
363 // Service JVMPI request.
365 if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
367 JVMPI_Event event;
369 event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
370 event.env_id = NULL;
371 event.u.obj_alloc.arena_id = 0;
372 event.u.obj_alloc.class_id = (jobjectID) klass;
373 event.u.obj_alloc.is_array = 0;
374 event.u.obj_alloc.size = size;
375 event.u.obj_alloc.obj_id = (jobjectID) obj;
377 _Jv_DisableGC ();
378 (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
379 _Jv_EnableGC ();
381 #endif
383 return obj;
386 // Allocate a new array of Java objects. Each object is of type
387 // `elementClass'. `init' is used to initialize each slot in the
388 // array.
389 jobjectArray
390 _Jv_NewObjectArray (jsize count, jclass elementClass, jobject init)
392 if (__builtin_expect (count < 0, false))
393 JvThrow (new java::lang::NegativeArraySizeException);
395 JvAssert (! elementClass->isPrimitive ());
397 // Ensure that elements pointer is properly aligned.
398 jobjectArray obj = NULL;
399 size_t size = (size_t) elements (obj);
400 size += count * sizeof (jobject);
402 // FIXME: second argument should be "current loader"
403 jclass klass = _Jv_GetArrayClass (elementClass, 0);
405 obj = (jobjectArray) _Jv_AllocArray (size, klass);
406 if (__builtin_expect (! obj, false))
407 JvThrow (no_memory);
408 // Cast away const.
409 jsize *lp = const_cast<jsize *> (&obj->length);
410 *lp = count;
411 // We know the allocator returns zeroed memory. So don't bother
412 // zeroing it again.
413 if (init)
415 jobject *ptr = elements(obj);
416 while (--count >= 0)
417 *ptr++ = init;
419 return obj;
422 // Allocate a new array of primitives. ELTYPE is the type of the
423 // element, COUNT is the size of the array.
424 jobject
425 _Jv_NewPrimArray (jclass eltype, jint count)
427 int elsize = eltype->size();
428 if (__builtin_expect (count < 0, false))
429 JvThrow (new java::lang::NegativeArraySizeException ());
431 JvAssert (eltype->isPrimitive ());
432 jobject dummy = NULL;
433 size_t size = (size_t) _Jv_GetArrayElementFromElementType (dummy, eltype);
435 // Check for overflow.
436 if (__builtin_expect ((size_t) count >
437 (SIZE_T_MAX - size) / elsize, false))
438 JvThrow (no_memory);
440 jclass klass = _Jv_GetArrayClass (eltype, 0);
442 __JArray *arr = (__JArray*) _Jv_AllocObj (size + elsize * count, klass);
443 if (__builtin_expect (! arr, false))
444 JvThrow (no_memory);
445 // Cast away const.
446 jsize *lp = const_cast<jsize *> (&arr->length);
447 *lp = count;
448 // Note that we assume we are given zeroed memory by the allocator.
450 return arr;
453 jobject
454 _Jv_NewArray (jint type, jint size)
456 switch (type)
458 case 4: return JvNewBooleanArray (size);
459 case 5: return JvNewCharArray (size);
460 case 6: return JvNewFloatArray (size);
461 case 7: return JvNewDoubleArray (size);
462 case 8: return JvNewByteArray (size);
463 case 9: return JvNewShortArray (size);
464 case 10: return JvNewIntArray (size);
465 case 11: return JvNewLongArray (size);
467 JvFail ("newarray - bad type code");
468 return NULL; // Placate compiler.
471 jobject
472 _Jv_NewMultiArray (jclass type, jint dimensions, jint *sizes)
474 JvAssert (type->isArray());
475 jclass element_type = type->getComponentType();
476 jobject result;
477 if (element_type->isPrimitive())
478 result = _Jv_NewPrimArray (element_type, sizes[0]);
479 else
480 result = _Jv_NewObjectArray (sizes[0], element_type, NULL);
482 if (dimensions > 1)
484 JvAssert (! element_type->isPrimitive());
485 JvAssert (element_type->isArray());
486 jobject *contents = elements ((jobjectArray) result);
487 for (int i = 0; i < sizes[0]; ++i)
488 contents[i] = _Jv_NewMultiArray (element_type, dimensions - 1,
489 sizes + 1);
492 return result;
495 jobject
496 _Jv_NewMultiArray (jclass array_type, jint dimensions, ...)
498 va_list args;
499 jint sizes[dimensions];
500 va_start (args, dimensions);
501 for (int i = 0; i < dimensions; ++i)
503 jint size = va_arg (args, jint);
504 sizes[i] = size;
506 va_end (args);
508 return _Jv_NewMultiArray (array_type, dimensions, sizes);
513 class _Jv_PrimClass : public java::lang::Class
515 public:
516 // FIXME: calling convention is weird. If we use the natural types
517 // then the compiler will complain because they aren't Java types.
518 _Jv_PrimClass (jobject cname, jbyte sig, jint len, jobject array_vtable)
520 using namespace java::lang::reflect;
522 // We must initialize every field of the class. We do this in
523 // the same order they are declared in Class.h.
524 next = NULL;
525 name = _Jv_makeUtf8Const ((char *) cname, -1);
526 accflags = Modifier::PUBLIC | Modifier::FINAL | Modifier::ABSTRACT;
527 superclass = NULL;
528 constants.size = 0;
529 constants.tags = NULL;
530 constants.data = NULL;
531 methods = NULL;
532 method_count = sig;
533 vtable_method_count = 0;
534 fields = NULL;
535 size_in_bytes = len;
536 field_count = 0;
537 static_field_count = 0;
538 vtable = JV_PRIMITIVE_VTABLE;
539 interfaces = NULL;
540 loader = NULL;
541 interface_count = 0;
542 state = JV_STATE_DONE;
543 thread = NULL;
544 depth = -1;
545 ancestors = NULL;
546 idt = NULL;
548 // Note that we have to set `methods' to NULL.
549 if (sig != 'V')
550 _Jv_NewArrayClass (this, NULL, (_Jv_VTable *) array_vtable);
551 else
552 arrayclass = NULL;
556 // We use this to define both primitive classes and the vtables for
557 // arrays of primitive classes. The latter are given names so that we
558 // can refer to them from the compiler, allowing us to construct
559 // arrays of primitives statically.
560 #define DECLARE_PRIM_TYPE(NAME, SIG, LEN) \
561 _Jv_ArrayVTable _Jv_##NAME##VTable; \
562 _Jv_PrimClass _Jv_##NAME##Class((jobject) #NAME, (jbyte) SIG, (jint) LEN, \
563 (jobject) &_Jv_##NAME##VTable)
565 DECLARE_PRIM_TYPE(byte, 'B', 1);
566 DECLARE_PRIM_TYPE(short, 'S', 2);
567 DECLARE_PRIM_TYPE(int, 'I', 4);
568 DECLARE_PRIM_TYPE(long, 'J', 8);
569 DECLARE_PRIM_TYPE(boolean, 'Z', 1);
570 DECLARE_PRIM_TYPE(char, 'C', 2);
571 DECLARE_PRIM_TYPE(float, 'F', 4);
572 DECLARE_PRIM_TYPE(double, 'D', 8);
573 DECLARE_PRIM_TYPE(void, 'V', 0);
575 jclass
576 _Jv_FindClassFromSignature (char *sig, java::lang::ClassLoader *loader)
578 switch (*sig)
580 case 'B':
581 return JvPrimClass (byte);
582 case 'S':
583 return JvPrimClass (short);
584 case 'I':
585 return JvPrimClass (int);
586 case 'J':
587 return JvPrimClass (long);
588 case 'Z':
589 return JvPrimClass (boolean);
590 case 'C':
591 return JvPrimClass (char);
592 case 'F':
593 return JvPrimClass (float);
594 case 'D':
595 return JvPrimClass (double);
596 case 'V':
597 return JvPrimClass (void);
598 case 'L':
600 int i;
601 for (i = 1; sig[i] && sig[i] != ';'; ++i)
603 _Jv_Utf8Const *name = _Jv_makeUtf8Const (&sig[1], i - 1);
604 return _Jv_FindClass (name, loader);
607 case '[':
608 return _Jv_GetArrayClass (_Jv_FindClassFromSignature (&sig[1], loader),
609 loader);
611 JvFail ("couldn't understand class signature");
612 return NULL; // Placate compiler.
617 JArray<jstring> *
618 JvConvertArgv (int argc, const char **argv)
620 if (argc < 0)
621 argc = 0;
622 jobjectArray ar = JvNewObjectArray(argc, &StringClass, NULL);
623 jobject* ptr = elements(ar);
624 for (int i = 0; i < argc; i++)
626 const char *arg = argv[i];
627 // FIXME - should probably use JvNewStringUTF.
628 *ptr++ = JvNewStringLatin1(arg, strlen(arg));
630 return (JArray<jstring>*) ar;
633 // FIXME: These variables are static so that they will be
634 // automatically scanned by the Boehm collector. This is needed
635 // because with qthreads the collector won't scan the initial stack --
636 // it will only scan the qthreads stacks.
638 // Command line arguments.
639 static jobject arg_vec;
641 // The primary thread.
642 static java::lang::Thread *main_thread;
644 char *
645 _Jv_ThisExecutable (void)
647 return _Jv_execName;
650 void
651 _Jv_ThisExecutable (const char *name)
653 if (name)
655 _Jv_execName = new char[strlen (name) + 1];
656 strcpy (_Jv_execName, name);
660 #ifdef USE_WIN32_SIGNALLING
662 extern "C" int* win32_get_restart_frame (void *);
664 LONG CALLBACK
665 win32_exception_handler (LPEXCEPTION_POINTERS e)
667 int* setjmp_buf;
668 if (e->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION)
669 setjmp_buf = win32_get_restart_frame (nullp);
670 else if (e->ExceptionRecord->ExceptionCode == EXCEPTION_INT_DIVIDE_BY_ZERO)
671 setjmp_buf = win32_get_restart_frame (arithexception);
672 else
673 return EXCEPTION_CONTINUE_SEARCH;
675 e->ContextRecord->Ebp = setjmp_buf[0];
676 // FIXME: Why does i386-signal.h increment the PC here, do we need to do it?
677 e->ContextRecord->Eip = setjmp_buf[1];
678 // FIXME: Is this the stack pointer? Do we need it?
679 e->ContextRecord->Esp = setjmp_buf[2];
681 return EXCEPTION_CONTINUE_EXECUTION;
684 #endif
686 static void
687 main_init ()
689 // Turn stack trace generation off while creating exception objects.
690 _Jv_InitClass (&java::lang::Throwable::class$);
691 java::lang::Throwable::trace_enabled = 0;
693 INIT_SEGV;
694 #ifdef HANDLE_FPE
695 INIT_FPE;
696 #else
697 arithexception = new java::lang::ArithmeticException
698 (JvNewStringLatin1 ("/ by zero"));
699 #endif
701 no_memory = new java::lang::OutOfMemoryError;
703 java::lang::Throwable::trace_enabled = 1;
705 #ifdef USE_LTDL
706 LTDL_SET_PRELOADED_SYMBOLS ();
707 #endif
709 #ifdef USE_WINSOCK
710 // Initialise winsock for networking
711 WSADATA data;
712 if (WSAStartup (MAKEWORD (1, 1), &data))
713 MessageBox (NULL, "Error initialising winsock library.", "Error", MB_OK | MB_ICONEXCLAMATION);
714 #endif /* USE_WINSOCK */
716 #ifdef USE_WIN32_SIGNALLING
717 // Install exception handler
718 SetUnhandledExceptionFilter (win32_exception_handler);
719 #else
720 // We only want this on POSIX systems.
721 struct sigaction act;
722 act.sa_handler = SIG_IGN;
723 sigemptyset (&act.sa_mask);
724 act.sa_flags = 0;
725 sigaction (SIGPIPE, &act, NULL);
726 #endif /* USE_WIN32_SIGNALLING */
728 _Jv_JNI_Init ();
731 #ifndef DISABLE_GETENV_PROPERTIES
733 static char *
734 next_property_key (char *s, size_t *length)
736 size_t l = 0;
738 JvAssert (s);
740 // Skip over whitespace
741 while (isspace (*s))
742 s++;
744 // If we've reached the end, return NULL. Also return NULL if for
745 // some reason we've come across a malformed property string.
746 if (*s == 0
747 || *s == ':'
748 || *s == '=')
749 return NULL;
751 // Determine the length of the property key.
752 while (s[l] != 0
753 && ! isspace (s[l])
754 && s[l] != ':'
755 && s[l] != '=')
757 if (s[l] == '\\'
758 && s[l+1] != 0)
759 l++;
760 l++;
763 *length = l;
765 return s;
768 static char *
769 next_property_value (char *s, size_t *length)
771 size_t l = 0;
773 JvAssert (s);
775 while (isspace (*s))
776 s++;
778 if (*s == ':'
779 || *s == '=')
780 s++;
782 while (isspace (*s))
783 s++;
785 // If we've reached the end, return NULL.
786 if (*s == 0)
787 return NULL;
789 // Determine the length of the property value.
790 while (s[l] != 0
791 && ! isspace (s[l])
792 && s[l] != ':'
793 && s[l] != '=')
795 if (s[l] == '\\'
796 && s[l+1] != 0)
797 l += 2;
798 else
799 l++;
802 *length = l;
804 return s;
807 static void
808 process_gcj_properties ()
810 char *props = getenv("GCJ_PROPERTIES");
811 char *p = props;
812 size_t length;
813 size_t property_count = 0;
815 if (NULL == props)
816 return;
818 // Whip through props quickly in order to count the number of
819 // property values.
820 while (p && (p = next_property_key (p, &length)))
822 // Skip to the end of the key
823 p += length;
825 p = next_property_value (p, &length);
826 if (p)
827 p += length;
829 property_count++;
832 // Allocate an array of property value/key pairs.
833 _Jv_Environment_Properties =
834 (property_pair *) malloc (sizeof(property_pair)
835 * (property_count + 1));
837 // Go through the properties again, initializing _Jv_Properties
838 // along the way.
839 p = props;
840 property_count = 0;
841 while (p && (p = next_property_key (p, &length)))
843 _Jv_Environment_Properties[property_count].key = p;
844 _Jv_Environment_Properties[property_count].key_length = length;
846 // Skip to the end of the key
847 p += length;
849 p = next_property_value (p, &length);
851 _Jv_Environment_Properties[property_count].value = p;
852 _Jv_Environment_Properties[property_count].value_length = length;
854 if (p)
855 p += length;
857 property_count++;
859 memset ((void *) &_Jv_Environment_Properties[property_count],
860 0, sizeof (property_pair));
862 size_t i = 0;
864 // Null terminate the strings.
865 while (_Jv_Environment_Properties[i].key)
867 _Jv_Environment_Properties[i].key[_Jv_Environment_Properties[i].key_length] = 0;
868 _Jv_Environment_Properties[i++].value[_Jv_Environment_Properties[i].value_length] = 0;
872 #endif // DISABLE_GETENV_PROPERTIES
874 void
875 JvRunMain (jclass klass, int argc, const char **argv)
877 PROCESS_GCJ_PROPERTIES;
879 _Jv_argv = argv;
880 _Jv_argc = argc;
882 main_init ();
883 #ifdef HAVE_PROC_SELF_EXE
884 char exec_name[20];
885 sprintf (exec_name, "/proc/%d/exe", getpid ());
886 _Jv_ThisExecutable (exec_name);
887 #else
888 _Jv_ThisExecutable (argv[0]);
889 #endif
891 arg_vec = JvConvertArgv (argc - 1, argv + 1);
892 main_thread = new gnu::gcj::runtime::FirstThread (klass, arg_vec);
894 main_thread->start();
895 _Jv_ThreadWait ();
897 int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
899 java::lang::Runtime::getRuntime ()->exit (status);
902 void
903 _Jv_RunMain (const char *name, int argc, const char **argv, bool is_jar)
905 jstring class_name;
906 PROCESS_GCJ_PROPERTIES;
908 main_init ();
910 #ifdef HAVE_PROC_SELF_EXE
911 char exec_name[20];
912 sprintf (exec_name, "/proc/%d/exe", getpid ());
913 _Jv_ThisExecutable (exec_name);
914 #endif
916 if (is_jar)
918 // name specifies a jar file. We must now extract the
919 // Main-Class attribute from the jar's manifest file. This is
920 // done by gnu.gcj.runtime.FirstThread.main.
921 _Jv_Jar_Class_Path = strdup (name);
922 arg_vec = JvConvertArgv (1, &_Jv_Jar_Class_Path);
924 main_thread =
925 new gnu::gcj::runtime::FirstThread (&gnu::gcj::runtime::FirstThread::class$,
926 arg_vec);
927 main_thread->start();
928 _Jv_ThreadWait ();
930 // FirstThread.main extracts the main class name and stores it
931 // here.
932 class_name = gnu::gcj::runtime::FirstThread::jarMainClassName;
934 // We need a new ClassLoader because the classpath must be the
935 // jar file only. The easiest way to do this is to lose our
936 // reference to the previous classloader.
937 java::lang::ClassLoader::system = NULL;
939 else
940 class_name = JvNewStringLatin1 (name);
942 arg_vec = JvConvertArgv (argc - 1, argv + 1);
944 if (class_name)
946 main_thread = new gnu::gcj::runtime::FirstThread (class_name, arg_vec);
947 main_thread->start();
948 _Jv_ThreadWait ();
951 int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
953 java::lang::Runtime::getRuntime ()->exit (status);
958 // Parse a string and return a heap size.
959 static size_t
960 parse_heap_size (const char *spec)
962 char *end;
963 unsigned long val = strtoul (spec, &end, 10);
964 if (*end == 'k' || *end == 'K')
965 val *= 1024;
966 else if (*end == 'm' || *end == 'M')
967 val *= 1048576;
968 return (size_t) val;
971 // Set the initial heap size. This might be ignored by the GC layer.
972 // This must be called before _Jv_RunMain.
973 void
974 _Jv_SetInitialHeapSize (const char *arg)
976 size_t size = parse_heap_size (arg);
977 _Jv_GCSetInitialHeapSize (size);
980 // Set the maximum heap size. This might be ignored by the GC layer.
981 // This must be called before _Jv_RunMain.
982 void
983 _Jv_SetMaximumHeapSize (const char *arg)
985 size_t size = parse_heap_size (arg);
986 _Jv_GCSetMaximumHeapSize (size);
991 void *
992 _Jv_Malloc (jsize size)
994 if (__builtin_expect (size == 0, false))
995 size = 1;
996 void *ptr = malloc ((size_t) size);
997 if (__builtin_expect (ptr == NULL, false))
998 JvThrow (no_memory);
999 return ptr;
1002 void *
1003 _Jv_Realloc (void *ptr, jsize size)
1005 if (__builtin_expect (size == 0, false))
1006 size = 1;
1007 ptr = realloc (ptr, (size_t) size);
1008 if (__builtin_expect (ptr == NULL, false))
1009 JvThrow (no_memory);
1010 return ptr;
1013 void *
1014 _Jv_MallocUnchecked (jsize size)
1016 if (__builtin_expect (size == 0, false))
1017 size = 1;
1018 return malloc ((size_t) size);
1021 void
1022 _Jv_Free (void* ptr)
1024 return free (ptr);
1029 // In theory, these routines can be #ifdef'd away on machines which
1030 // support divide overflow signals. However, we never know if some
1031 // code might have been compiled with "-fuse-divide-subroutine", so we
1032 // always include them in libgcj.
1034 jint
1035 _Jv_divI (jint dividend, jint divisor)
1037 if (__builtin_expect (divisor == 0, false))
1038 _Jv_ThrowSignal (arithexception);
1040 if (dividend == (jint) 0x80000000L && divisor == -1)
1041 return dividend;
1043 return dividend / divisor;
1046 jint
1047 _Jv_remI (jint dividend, jint divisor)
1049 if (__builtin_expect (divisor == 0, false))
1050 _Jv_ThrowSignal (arithexception);
1052 if (dividend == (jint) 0x80000000L && divisor == -1)
1053 return 0;
1055 return dividend % divisor;
1058 jlong
1059 _Jv_divJ (jlong dividend, jlong divisor)
1061 if (__builtin_expect (divisor == 0, false))
1062 _Jv_ThrowSignal (arithexception);
1064 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1065 return dividend;
1067 return dividend / divisor;
1070 jlong
1071 _Jv_remJ (jlong dividend, jlong divisor)
1073 if (__builtin_expect (divisor == 0, false))
1074 _Jv_ThrowSignal (arithexception);
1076 if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
1077 return 0;
1079 return dividend % divisor;