1 /* src/native/vm/sun_misc_Unsafe.c - sun/misc/Unsafe
3 Copyright (C) 2006, 2007 R. Grafl, A. Krall, C. Kruegel, C. Oates,
4 R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
5 C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
6 Institut f. Computersprachen - TU Wien
8 This file is part of CACAO.
10 This program is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2, or (at
13 your option) any later version.
15 This program is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
25 $Id: java_lang_VMObject.c 5153 2006-07-18 08:19:24Z twisti $
34 #include "mm/memory.h"
36 #include "native/jni.h"
37 #include "native/native.h"
39 #include "native/include/java_lang_Object.h" /* before c.l.C */
40 #include "native/include/java_lang_String.h" /* required by j.l.CL */
42 #if defined(WITH_CLASSPATH_SUN)
43 # include "native/include/java_nio_ByteBuffer.h" /* required by j.l.CL */
46 #include "native/include/java_lang_ClassLoader.h" /* required by j.l.C */
47 #include "native/include/java_lang_Class.h"
48 #include "native/include/java_lang_reflect_Field.h"
49 #include "native/include/java_lang_Thread.h" /* required by s.m.U */
50 #include "native/include/java_lang_Throwable.h"
52 #if defined(WITH_CLASSPATH_SUN)
53 # include "native/include/java_security_ProtectionDomain.h" /* required by smU*/
56 #include "native/include/sun_misc_Unsafe.h"
58 #include "vm/exceptions.h"
59 #include "vm/initialize.h"
61 #include "vmcore/utf8.h"
64 /* native methods implemented by this file ************************************/
66 static JNINativeMethod methods[] = {
67 { "registerNatives", "()V", (void *) (intptr_t) &Java_sun_misc_Unsafe_registerNatives },
68 { "getInt", "(Ljava/lang/Object;J)I", (void *) (intptr_t) &Java_sun_misc_Unsafe_getInt__Ljava_lang_Object_2J },
69 { "getBoolean", "(Ljava/lang/Object;J)Z", (void *) (intptr_t) &Java_sun_misc_Unsafe_getBoolean },
70 { "putBoolean", "(Ljava/lang/Object;JZ)V", (void *) (intptr_t) &Java_sun_misc_Unsafe_putBoolean },
71 { "getByte", "(Ljava/lang/Object;J)B", (void *) (intptr_t) &Java_sun_misc_Unsafe_getByte__Ljava_lang_Object_2J },
72 { "putByte", "(Ljava/lang/Object;JB)V", (void *) (intptr_t) &Java_sun_misc_Unsafe_putByte__Ljava_lang_Object_2JB },
73 { "getChar", "(Ljava/lang/Object;J)C", (void *) (intptr_t) &Java_sun_misc_Unsafe_getChar__Ljava_lang_Object_2J },
74 { "putChar", "(Ljava/lang/Object;JC)V", (void *) (intptr_t) &Java_sun_misc_Unsafe_putChar__Ljava_lang_Object_2JC },
75 { "getByte", "(J)B", (void *) (intptr_t) &Java_sun_misc_Unsafe_getByte__J },
76 { "getInt", "(J)I", (void *) (intptr_t) &Java_sun_misc_Unsafe_getInt__J },
77 { "getLong", "(J)J", (void *) (intptr_t) &Java_sun_misc_Unsafe_getLong__J },
78 { "putLong", "(JJ)V", (void *) (intptr_t) &Java_sun_misc_Unsafe_putLong__JJ },
79 { "objectFieldOffset", "(Ljava/lang/reflect/Field;)J", (void *) (intptr_t) &Java_sun_misc_Unsafe_objectFieldOffset },
80 { "allocateMemory", "(J)J", (void *) (intptr_t) &Java_sun_misc_Unsafe_allocateMemory },
81 { "freeMemory", "(J)V", (void *) (intptr_t) &Java_sun_misc_Unsafe_freeMemory },
82 { "staticFieldOffset", "(Ljava/lang/reflect/Field;)J", (void *) (intptr_t) &Java_sun_misc_Unsafe_staticFieldOffset },
83 { "staticFieldBase", "(Ljava/lang/reflect/Field;)Ljava/lang/Object;", (void *) (intptr_t) &Java_sun_misc_Unsafe_staticFieldBase },
84 { "ensureClassInitialized", "(Ljava/lang/Class;)V", (void *) (intptr_t) &Java_sun_misc_Unsafe_ensureClassInitialized },
85 { "arrayBaseOffset", "(Ljava/lang/Class;)I", (void *) (intptr_t) &Java_sun_misc_Unsafe_arrayBaseOffset },
86 { "arrayIndexScale", "(Ljava/lang/Class;)I", (void *) (intptr_t) &Java_sun_misc_Unsafe_arrayIndexScale },
87 { "addressSize", "()I", (void *) (intptr_t) &Java_sun_misc_Unsafe_addressSize },
88 { "throwException", "(Ljava/lang/Throwable;)V", (void *) (intptr_t) &Java_sun_misc_Unsafe_throwException },
89 { "compareAndSwapObject", "(Ljava/lang/Object;JLjava/lang/Object;Ljava/lang/Object;)Z", (void *) (intptr_t) &Java_sun_misc_Unsafe_compareAndSwapObject },
90 { "compareAndSwapInt", "(Ljava/lang/Object;JII)Z", (void *) (intptr_t) &Java_sun_misc_Unsafe_compareAndSwapInt },
91 { "compareAndSwapLong", "(Ljava/lang/Object;JJJ)Z", (void *) (intptr_t) &Java_sun_misc_Unsafe_compareAndSwapLong },
92 { "getObjectVolatile", "(Ljava/lang/Object;J)Ljava/lang/Object;", (void *) (intptr_t) &Java_sun_misc_Unsafe_getObjectVolatile },
93 { "getIntVolatile", "(Ljava/lang/Object;J)I", (void *) (intptr_t) &Java_sun_misc_Unsafe_getIntVolatile },
97 /* _Jv_sun_misc_Unsafe_init ****************************************************
99 Register native functions.
101 *******************************************************************************/
103 void _Jv_sun_misc_Unsafe_init(void)
107 u = utf_new_char("sun/misc/Unsafe");
109 native_method_register(u, methods, NATIVE_METHODS_COUNT);
114 * Class: sun/misc/Unsafe
115 * Method: registerNatives
118 JNIEXPORT void JNICALL Java_sun_misc_Unsafe_registerNatives(JNIEnv *env, jclass clazz)
120 /* The native methods of this function are already registered in
121 _Jv_sun_misc_Unsafe_init() which is called during VM
127 * Class: sun/misc/Unsafe
129 * Signature: (Ljava/lang/Object;J)I
131 JNIEXPORT int32_t JNICALL Java_sun_misc_Unsafe_getInt__Ljava_lang_Object_2J(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Object *o, int64_t offset)
136 p = (int32_t *) (((uint8_t *) o) + offset);
145 * Class: sun/misc/Unsafe
147 * Signature: (Ljava/lang/Object;J)Z
149 JNIEXPORT int32_t JNICALL Java_sun_misc_Unsafe_getBoolean(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Object *o, int64_t offset)
154 p = (int32_t *) (((uint8_t *) o) + offset);
163 * Class: sun/misc/Unsafe
165 * Signature: (Ljava/lang/Object;JZ)V
167 JNIEXPORT void JNICALL Java_sun_misc_Unsafe_putBoolean(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Object *o, int64_t offset, int32_t x)
171 p = (int32_t *) (((uint8_t *) o) + offset);
178 * Class: sun/misc/Unsafe
180 * Signature: (Ljava/lang/Object;J)B
182 JNIEXPORT int32_t JNICALL Java_sun_misc_Unsafe_getByte__Ljava_lang_Object_2J(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Object *o, int64_t offset)
187 p = (int32_t *) (((uint8_t *) o) + offset);
196 * Class: sun/misc/Unsafe
198 * Signature: (Ljava/lang/Object;JB)V
200 JNIEXPORT void JNICALL Java_sun_misc_Unsafe_putByte__Ljava_lang_Object_2JB(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Object *o, int64_t offset, int32_t x)
204 p = (int32_t *) (((uint8_t *) o) + offset);
211 * Class: sun/misc/Unsafe
213 * Signature: (Ljava/lang/Object;J)C
215 JNIEXPORT int32_t JNICALL Java_sun_misc_Unsafe_getChar__Ljava_lang_Object_2J(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Object *o, int64_t offset)
220 p = (int32_t *) (((uint8_t *) o) + offset);
229 * Class: sun/misc/Unsafe
231 * Signature: (Ljava/lang/Object;JC)V
233 JNIEXPORT void JNICALL Java_sun_misc_Unsafe_putChar__Ljava_lang_Object_2JC(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Object *o, int64_t offset, int32_t x)
237 p = (int32_t *) (((uint8_t *) o) + offset);
244 * Class: sun/misc/Unsafe
248 JNIEXPORT int32_t JNICALL Java_sun_misc_Unsafe_getByte__J(JNIEnv *env, sun_misc_Unsafe *this, int64_t address)
253 p = (int8_t *) (intptr_t) address;
257 return (int32_t) value;
262 * Class: sun/misc/Unsafe
266 JNIEXPORT int32_t JNICALL Java_sun_misc_Unsafe_getInt__J(JNIEnv *env, sun_misc_Unsafe *this, int64_t address)
271 p = (int32_t *) (intptr_t) address;
280 * Class: sun/misc/Unsafe
284 JNIEXPORT int64_t JNICALL Java_sun_misc_Unsafe_getLong__J(JNIEnv *env, sun_misc_Unsafe *this, int64_t address)
289 p = (int64_t *) (intptr_t) address;
298 * Class: sun/misc/Unsafe
302 JNIEXPORT void JNICALL Java_sun_misc_Unsafe_putLong__JJ(JNIEnv *env, sun_misc_Unsafe *this, int64_t address, int64_t value)
306 p = (int64_t *) (intptr_t) address;
313 * Class: sun/misc/Unsafe
314 * Method: objectFieldOffset
315 * Signature: (Ljava/lang/reflect/Field;)J
317 JNIEXPORT int64_t JNICALL Java_sun_misc_Unsafe_objectFieldOffset(JNIEnv *env, sun_misc_Unsafe* this, java_lang_reflect_Field* field)
322 c = (classinfo *) field->clazz;
323 f = &c->fields[field->slot];
325 return (int64_t) f->offset;
330 * Class: sun/misc/Unsafe
331 * Method: allocateMemory
334 JNIEXPORT int64_t JNICALL Java_sun_misc_Unsafe_allocateMemory(JNIEnv *env, sun_misc_Unsafe *this, int64_t bytes)
339 length = (size_t) bytes;
341 if ((length != (uint64_t) bytes) || (bytes < 0)) {
342 exceptions_throw_illegalargumentexception();
346 p = MNEW(uint8_t, length);
348 return (int64_t) (intptr_t) p;
353 * Class: sun/misc/Unsafe
357 JNIEXPORT void JNICALL Java_sun_misc_Unsafe_freeMemory(JNIEnv *env, sun_misc_Unsafe *this, int64_t address)
361 p = (void *) (intptr_t) address;
366 /* we pass length 1 to trick the free function */
368 MFREE(p, uint8_t, 1);
373 * Class: sun/misc/Unsafe
374 * Method: staticFieldOffset
375 * Signature: (Ljava/lang/reflect/Field;)J
377 JNIEXPORT int64_t JNICALL Java_sun_misc_Unsafe_staticFieldOffset(JNIEnv *env, sun_misc_Unsafe *this, java_lang_reflect_Field *field)
382 c = (classinfo *) field->clazz;
383 f = &(c->fields[field->slot]);
385 return (int64_t) (intptr_t) &(f->value);
390 * Class: sun/misc/Unsafe
391 * Method: staticFieldBase
392 * Signature: (Ljava/lang/reflect/Field;)Ljava/lang/Object;
394 JNIEXPORT java_lang_Object* JNICALL Java_sun_misc_Unsafe_staticFieldBase(JNIEnv *env, sun_misc_Unsafe *this, java_lang_reflect_Field *f)
396 /* In CACAO we return the absolute address in staticFieldOffset. */
403 * Class: sun/misc/Unsafe
404 * Method: ensureClassInitialized
405 * Signature: (Ljava/lang/Class;)V
407 JNIEXPORT void JNICALL Java_sun_misc_Unsafe_ensureClassInitialized(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Class *class)
411 c = (classinfo *) class;
413 if (!(c->state & CLASS_INITIALIZED))
419 * Class: sun/misc/Unsafe
420 * Method: arrayBaseOffset
421 * Signature: (Ljava/lang/Class;)I
423 JNIEXPORT int32_t JNICALL Java_sun_misc_Unsafe_arrayBaseOffset(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Class *arrayClass)
428 c = (classinfo *) arrayClass;
429 ad = c->vftbl->arraydesc;
432 /* XXX does that exception exist? */
433 exceptions_throw_internalerror("java/lang/InvalidClassException");
437 return ad->dataoffset;
442 * Class: sun/misc/Unsafe
443 * Method: arrayIndexScale
444 * Signature: (Ljava/lang/Class;)I
446 JNIEXPORT int32_t JNICALL Java_sun_misc_Unsafe_arrayIndexScale(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Class *arrayClass)
451 c = (classinfo *) arrayClass;
452 ad = c->vftbl->arraydesc;
455 /* XXX does that exception exist? */
456 exceptions_throw_internalerror("java/lang/InvalidClassException");
460 return ad->componentsize;
465 * Class: sun/misc/Unsafe
466 * Method: addressSize
469 JNIEXPORT int32_t JNICALL Java_sun_misc_Unsafe_addressSize(JNIEnv *env, sun_misc_Unsafe *this)
471 return SIZEOF_VOID_P;
476 * Class: sun/misc/Unsafe
477 * Method: throwException
478 * Signature: (Ljava/lang/Throwable;)V
480 JNIEXPORT void JNICALL Java_sun_misc_Unsafe_throwException(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Throwable *ee)
482 java_objectheader *o;
484 o = (java_objectheader *) ee;
486 exceptions_set_exception(o);
491 * Class: sun/misc/Unsafe
492 * Method: compareAndSwapObject
493 * Signature: (Ljava/lang/Object;JLjava/lang/Object;Ljava/lang/Object;)Z
495 JNIEXPORT int32_t JNICALL Java_sun_misc_Unsafe_compareAndSwapObject(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Object *o, int64_t offset, java_lang_Object *expected, java_lang_Object *x)
500 p = (void **) (((uint8_t *) o) + offset);
502 /* XXX this should be atomic */
506 if (value == expected) {
517 * Class: sun/misc/Unsafe
518 * Method: compareAndSwapInt
519 * Signature: (Ljava/lang/Object;JII)Z
521 JNIEXPORT int32_t JNICALL Java_sun_misc_Unsafe_compareAndSwapInt(JNIEnv *env, sun_misc_Unsafe* this, java_lang_Object* obj, int64_t offset, int32_t expect, int32_t update)
526 p = (int32_t *) (((uint8_t *) obj) + offset);
528 /* XXX this should be atomic */
532 if (value == expect) {
543 * Class: sun/misc/Unsafe
544 * Method: compareAndSwapLong
545 * Signature: (Ljava/lang/Object;JJJ)Z
547 JNIEXPORT int32_t JNICALL Java_sun_misc_Unsafe_compareAndSwapLong(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Object *o, int64_t offset, int64_t expected, int64_t x)
552 p = (int64_t *) (((uint8_t *) o) + offset);
554 /* XXX this should be atomic */
558 if (value == expected) {
569 * Class: sun/misc/Unsafe
570 * Method: getObjectVolatile
571 * Signature: (Ljava/lang/Object;J)Ljava/lang/Object;
573 JNIEXPORT java_lang_Object* JNICALL Java_sun_misc_Unsafe_getObjectVolatile(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Object *o, int64_t offset)
576 volatile void *value;
578 p = (volatile void **) (((uint8_t *) o) + offset);
582 return (java_lang_Object *) value;
587 * Class: sun/misc/Unsafe
588 * Method: getIntVolatile
589 * Signature: (Ljava/lang/Object;J)I
591 JNIEXPORT int32_t JNICALL Java_sun_misc_Unsafe_getIntVolatile(JNIEnv *env, sun_misc_Unsafe *this, java_lang_Object *o, int64_t offset)
594 volatile int32_t value;
596 p = (volatile int32_t *) (((uint8_t *) o) + offset);
605 * These are local overrides for various environment variables in Emacs.
606 * Please do not remove this and leave it at the end of the file, where
607 * Emacs will automagically detect them.
608 * ---------------------------------------------------------------------
611 * indent-tabs-mode: t