Mercurial > hg > graal-compiler
comparison src/share/vm/prims/unsafe.cpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
---|---|
date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | ba764ed4b6f2 |
comparison
equal
deleted
inserted
replaced
-1:000000000000 | 0:a61af66fc99e |
---|---|
1 /* | |
2 * Copyright 2000-2007 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 /* | |
26 * Implementation of class sun.misc.Unsafe | |
27 */ | |
28 | |
29 #include "incls/_precompiled.incl" | |
30 #include "incls/_unsafe.cpp.incl" | |
31 | |
32 #define MAX_OBJECT_SIZE \ | |
33 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ | |
34 + ((julong)max_jint * sizeof(double)) ) | |
35 | |
36 | |
37 #define UNSAFE_ENTRY(result_type, header) \ | |
38 JVM_ENTRY(result_type, header) | |
39 | |
40 // Can't use UNSAFE_LEAF because it has the signature of a straight | |
41 // call into the runtime (just like JVM_LEAF, funny that) but it's | |
42 // called like a Java Native and thus the wrapper built for it passes | |
43 // arguments like a JNI call. It expects those arguments to be popped | |
44 // from the stack on Intel like all good JNI args are, and adjusts the | |
45 // stack according. Since the JVM_LEAF call expects no extra | |
46 // arguments the stack isn't popped in the C code, is pushed by the | |
47 // wrapper and we get sick. | |
48 //#define UNSAFE_LEAF(result_type, header) \ | |
49 // JVM_LEAF(result_type, header) | |
50 | |
51 #define UNSAFE_END JVM_END | |
52 | |
53 #define UnsafeWrapper(arg) /*nothing, for the present*/ | |
54 | |
55 | |
56 inline void* addr_from_java(jlong addr) { | |
57 // This assert fails in a variety of ways on 32-bit systems. | |
58 // It is impossible to predict whether native code that converts | |
59 // pointers to longs will sign-extend or zero-extend the addresses. | |
60 //assert(addr == (uintptr_t)addr, "must not be odd high bits"); | |
61 return (void*)(uintptr_t)addr; | |
62 } | |
63 | |
64 inline jlong addr_to_java(void* p) { | |
65 assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); | |
66 return (uintptr_t)p; | |
67 } | |
68 | |
69 | |
70 // Note: The VM's obj_field and related accessors use byte-scaled | |
71 // ("unscaled") offsets, just as the unsafe methods do. | |
72 | |
73 // However, the method Unsafe.fieldOffset explicitly declines to | |
74 // guarantee this. The field offset values manipulated by the Java user | |
75 // through the Unsafe API are opaque cookies that just happen to be byte | |
76 // offsets. We represent this state of affairs by passing the cookies | |
77 // through conversion functions when going between the VM and the Unsafe API. | |
78 // The conversion functions just happen to be no-ops at present. | |
79 | |
80 inline jlong field_offset_to_byte_offset(jlong field_offset) { | |
81 return field_offset; | |
82 } | |
83 | |
84 inline jlong field_offset_from_byte_offset(jlong byte_offset) { | |
85 return byte_offset; | |
86 } | |
87 | |
88 inline jint invocation_key_from_method_slot(jint slot) { | |
89 return slot; | |
90 } | |
91 | |
92 inline jint invocation_key_to_method_slot(jint key) { | |
93 return key; | |
94 } | |
95 | |
96 inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { | |
97 jlong byte_offset = field_offset_to_byte_offset(field_offset); | |
98 #ifdef ASSERT | |
99 if (p != NULL) { | |
100 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
101 if (byte_offset == (jint)byte_offset) { | |
102 void* ptr_plus_disp = (address)p + byte_offset; | |
103 assert((void*)p->obj_field_addr((jint)byte_offset) == ptr_plus_disp, | |
104 "raw [ptr+disp] must be consistent with oop::field_base"); | |
105 } | |
106 } | |
107 #endif | |
108 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
109 return (address)p + (jint) byte_offset; | |
110 else | |
111 return (address)p + byte_offset; | |
112 } | |
113 | |
114 // Externally callable versions: | |
115 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
116 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
117 return field_offset; | |
118 } | |
119 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
120 return byte_offset; | |
121 } | |
122 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
123 return invocation_key_from_method_slot(slot); | |
124 } | |
125 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
126 return invocation_key_to_method_slot(key); | |
127 } | |
128 | |
129 | |
130 ///// Data in the Java heap. | |
131 | |
132 #define GET_FIELD(obj, offset, type_name, v) \ | |
133 oop p = JNIHandles::resolve(obj); \ | |
134 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
135 | |
136 #define SET_FIELD(obj, offset, type_name, x) \ | |
137 oop p = JNIHandles::resolve(obj); \ | |
138 *(type_name*)index_oop_from_field_offset_long(p, offset) = x | |
139 | |
140 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
141 oop p = JNIHandles::resolve(obj); \ | |
142 volatile type_name v = *(volatile type_name*)index_oop_from_field_offset_long(p, offset) | |
143 | |
144 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
145 oop p = JNIHandles::resolve(obj); \ | |
146 *(volatile type_name*)index_oop_from_field_offset_long(p, offset) = x; \ | |
147 OrderAccess::fence(); | |
148 | |
149 // Get/SetObject must be special-cased, since it works with handles. | |
150 | |
151 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
152 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
153 UnsafeWrapper("Unsafe_GetObject"); | |
154 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
155 GET_FIELD(obj, offset, oop, v); | |
156 return JNIHandles::make_local(env, v); | |
157 UNSAFE_END | |
158 | |
159 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
160 UnsafeWrapper("Unsafe_SetObject"); | |
161 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
162 oop x = JNIHandles::resolve(x_h); | |
163 //SET_FIELD(obj, offset, oop, x); | |
164 oop p = JNIHandles::resolve(obj); | |
165 if (x != NULL) { | |
166 // If there is a heap base pointer, we are obliged to emit a store barrier. | |
167 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); | |
168 } else { | |
169 *(oop*)index_oop_from_field_offset_long(p, offset) = x; | |
170 } | |
171 UNSAFE_END | |
172 | |
173 // The normal variants allow a null base pointer with an arbitrary address. | |
174 // But if the base pointer is non-null, the offset should make some sense. | |
175 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
176 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
177 UnsafeWrapper("Unsafe_GetObject"); | |
178 GET_FIELD(obj, offset, oop, v); | |
179 return JNIHandles::make_local(env, v); | |
180 UNSAFE_END | |
181 | |
182 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
183 UnsafeWrapper("Unsafe_SetObject"); | |
184 oop x = JNIHandles::resolve(x_h); | |
185 oop p = JNIHandles::resolve(obj); | |
186 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); | |
187 UNSAFE_END | |
188 | |
189 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
190 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
191 GET_FIELD_VOLATILE(obj, offset, oop, v); | |
192 return JNIHandles::make_local(env, v); | |
193 UNSAFE_END | |
194 | |
195 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
196 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
197 oop x = JNIHandles::resolve(x_h); | |
198 oop p = JNIHandles::resolve(obj); | |
199 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); | |
200 OrderAccess::fence(); | |
201 UNSAFE_END | |
202 | |
203 // Volatile long versions must use locks if !VM_Version::supports_cx8(). | |
204 // support_cx8 is a surrogate for 'supports atomic long memory ops'. | |
205 | |
206 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
207 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
208 { | |
209 if (VM_Version::supports_cx8()) { | |
210 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
211 return v; | |
212 } | |
213 else { | |
214 Handle p (THREAD, JNIHandles::resolve(obj)); | |
215 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
216 ObjectLocker ol(p, THREAD); | |
217 jlong value = *addr; | |
218 return value; | |
219 } | |
220 } | |
221 UNSAFE_END | |
222 | |
223 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
224 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
225 { | |
226 if (VM_Version::supports_cx8()) { | |
227 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
228 } | |
229 else { | |
230 Handle p (THREAD, JNIHandles::resolve(obj)); | |
231 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
232 ObjectLocker ol(p, THREAD); | |
233 *addr = x; | |
234 } | |
235 } | |
236 UNSAFE_END | |
237 | |
238 | |
239 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
240 \ | |
241 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
242 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
243 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
244 GET_FIELD(obj, offset, jboolean, v); \ | |
245 return v; \ | |
246 UNSAFE_END \ | |
247 \ | |
248 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
249 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
250 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
251 SET_FIELD(obj, offset, jboolean, x); \ | |
252 UNSAFE_END \ | |
253 \ | |
254 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
255 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
256 GET_FIELD(obj, offset, jboolean, v); \ | |
257 return v; \ | |
258 UNSAFE_END \ | |
259 \ | |
260 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
261 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
262 SET_FIELD(obj, offset, jboolean, x); \ | |
263 UNSAFE_END \ | |
264 \ | |
265 // END DEFINE_GETSETOOP. | |
266 | |
267 | |
268 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
269 \ | |
270 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
271 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
272 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
273 return v; \ | |
274 UNSAFE_END \ | |
275 \ | |
276 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
277 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
278 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
279 UNSAFE_END \ | |
280 \ | |
281 // END DEFINE_GETSETOOP_VOLATILE. | |
282 | |
283 DEFINE_GETSETOOP(jboolean, Boolean) | |
284 DEFINE_GETSETOOP(jbyte, Byte) | |
285 DEFINE_GETSETOOP(jshort, Short); | |
286 DEFINE_GETSETOOP(jchar, Char); | |
287 DEFINE_GETSETOOP(jint, Int); | |
288 DEFINE_GETSETOOP(jlong, Long); | |
289 DEFINE_GETSETOOP(jfloat, Float); | |
290 DEFINE_GETSETOOP(jdouble, Double); | |
291 | |
292 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
293 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
294 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
295 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
296 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
297 // no long -- handled specially | |
298 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
299 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
300 | |
301 #undef DEFINE_GETSETOOP | |
302 | |
303 // The non-intrinsified versions of setOrdered just use setVolatile | |
304 | |
305 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) \ | |
306 UnsafeWrapper("Unsafe_SetOrderedInt"); \ | |
307 SET_FIELD_VOLATILE(obj, offset, jint, x); \ | |
308 UNSAFE_END | |
309 | |
310 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
311 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
312 oop x = JNIHandles::resolve(x_h); | |
313 oop p = JNIHandles::resolve(obj); | |
314 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); | |
315 OrderAccess::fence(); | |
316 UNSAFE_END | |
317 | |
318 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
319 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
320 { | |
321 if (VM_Version::supports_cx8()) { | |
322 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
323 } | |
324 else { | |
325 Handle p (THREAD, JNIHandles::resolve(obj)); | |
326 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
327 ObjectLocker ol(p, THREAD); | |
328 *addr = x; | |
329 } | |
330 } | |
331 UNSAFE_END | |
332 | |
333 ////// Data in the C heap. | |
334 | |
335 // Note: These do not throw NullPointerException for bad pointers. | |
336 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
337 // | |
338 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
339 \ | |
340 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
341 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
342 void* p = addr_from_java(addr); \ | |
343 JavaThread* t = JavaThread::current(); \ | |
344 t->set_doing_unsafe_access(true); \ | |
345 java_type x = *(volatile native_type*)p; \ | |
346 t->set_doing_unsafe_access(false); \ | |
347 return x; \ | |
348 UNSAFE_END \ | |
349 \ | |
350 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
351 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
352 JavaThread* t = JavaThread::current(); \ | |
353 t->set_doing_unsafe_access(true); \ | |
354 void* p = addr_from_java(addr); \ | |
355 *(volatile native_type*)p = x; \ | |
356 t->set_doing_unsafe_access(false); \ | |
357 UNSAFE_END \ | |
358 \ | |
359 // END DEFINE_GETSETNATIVE. | |
360 | |
361 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
362 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
363 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
364 DEFINE_GETSETNATIVE(jint, Int, jint); | |
365 // no long -- handled specially | |
366 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
367 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
368 | |
369 #undef DEFINE_GETSETNATIVE | |
370 | |
371 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
372 UnsafeWrapper("Unsafe_GetNativeLong"); | |
373 JavaThread* t = JavaThread::current(); | |
374 // We do it this way to avoid problems with access to heap using 64 | |
375 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
376 // some CPUs (SPARC) it leads to SIGBUS. | |
377 t->set_doing_unsafe_access(true); | |
378 void* p = addr_from_java(addr); | |
379 jlong x; | |
380 if (((intptr_t)p & 7) == 0) { | |
381 // jlong is aligned, do a volatile access | |
382 x = *(volatile jlong*)p; | |
383 } else { | |
384 jlong_accessor acc; | |
385 acc.words[0] = ((volatile jint*)p)[0]; | |
386 acc.words[1] = ((volatile jint*)p)[1]; | |
387 x = acc.long_value; | |
388 } | |
389 t->set_doing_unsafe_access(false); | |
390 return x; | |
391 UNSAFE_END | |
392 | |
393 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
394 UnsafeWrapper("Unsafe_SetNativeLong"); | |
395 JavaThread* t = JavaThread::current(); | |
396 // see comment for Unsafe_GetNativeLong | |
397 t->set_doing_unsafe_access(true); | |
398 void* p = addr_from_java(addr); | |
399 if (((intptr_t)p & 7) == 0) { | |
400 // jlong is aligned, do a volatile access | |
401 *(volatile jlong*)p = x; | |
402 } else { | |
403 jlong_accessor acc; | |
404 acc.long_value = x; | |
405 ((volatile jint*)p)[0] = acc.words[0]; | |
406 ((volatile jint*)p)[1] = acc.words[1]; | |
407 } | |
408 t->set_doing_unsafe_access(false); | |
409 UNSAFE_END | |
410 | |
411 | |
412 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
413 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
414 void* p = addr_from_java(addr); | |
415 return addr_to_java(*(void**)p); | |
416 UNSAFE_END | |
417 | |
418 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
419 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
420 void* p = addr_from_java(addr); | |
421 *(void**)p = addr_from_java(x); | |
422 UNSAFE_END | |
423 | |
424 | |
425 ////// Allocation requests | |
426 | |
427 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
428 UnsafeWrapper("Unsafe_AllocateInstance"); | |
429 { | |
430 ThreadToNativeFromVM ttnfv(thread); | |
431 return env->AllocObject(cls); | |
432 } | |
433 UNSAFE_END | |
434 | |
435 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
436 UnsafeWrapper("Unsafe_AllocateMemory"); | |
437 size_t sz = (size_t)size; | |
438 if (sz != (julong)size || size < 0) { | |
439 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
440 } | |
441 if (sz == 0) { | |
442 return 0; | |
443 } | |
444 sz = round_to(sz, HeapWordSize); | |
445 void* x = os::malloc(sz); | |
446 if (x == NULL) { | |
447 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
448 } | |
449 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
450 return addr_to_java(x); | |
451 UNSAFE_END | |
452 | |
453 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
454 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
455 void* p = addr_from_java(addr); | |
456 size_t sz = (size_t)size; | |
457 if (sz != (julong)size || size < 0) { | |
458 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
459 } | |
460 if (sz == 0) { | |
461 os::free(p); | |
462 return 0; | |
463 } | |
464 sz = round_to(sz, HeapWordSize); | |
465 void* x = (p == NULL) ? os::malloc(sz) : os::realloc(p, sz); | |
466 if (x == NULL) { | |
467 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
468 } | |
469 return addr_to_java(x); | |
470 UNSAFE_END | |
471 | |
472 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
473 UnsafeWrapper("Unsafe_FreeMemory"); | |
474 void* p = addr_from_java(addr); | |
475 if (p == NULL) { | |
476 return; | |
477 } | |
478 os::free(p); | |
479 UNSAFE_END | |
480 | |
481 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
482 UnsafeWrapper("Unsafe_SetMemory"); | |
483 size_t sz = (size_t)size; | |
484 if (sz != (julong)size || size < 0) { | |
485 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
486 } | |
487 char* p = (char*) addr_from_java(addr); | |
488 Copy::fill_to_memory_atomic(p, sz, value); | |
489 UNSAFE_END | |
490 | |
491 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
492 UnsafeWrapper("Unsafe_SetMemory"); | |
493 size_t sz = (size_t)size; | |
494 if (sz != (julong)size || size < 0) { | |
495 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
496 } | |
497 oop base = JNIHandles::resolve(obj); | |
498 void* p = index_oop_from_field_offset_long(base, offset); | |
499 Copy::fill_to_memory_atomic(p, sz, value); | |
500 UNSAFE_END | |
501 | |
502 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
503 UnsafeWrapper("Unsafe_CopyMemory"); | |
504 if (size == 0) { | |
505 return; | |
506 } | |
507 size_t sz = (size_t)size; | |
508 if (sz != (julong)size || size < 0) { | |
509 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
510 } | |
511 void* src = addr_from_java(srcAddr); | |
512 void* dst = addr_from_java(dstAddr); | |
513 Copy::conjoint_memory_atomic(src, dst, sz); | |
514 UNSAFE_END | |
515 | |
516 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
517 UnsafeWrapper("Unsafe_CopyMemory"); | |
518 if (size == 0) { | |
519 return; | |
520 } | |
521 size_t sz = (size_t)size; | |
522 if (sz != (julong)size || size < 0) { | |
523 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
524 } | |
525 oop srcp = JNIHandles::resolve(srcObj); | |
526 oop dstp = JNIHandles::resolve(dstObj); | |
527 if (dstp != NULL && !dstp->is_typeArray()) { | |
528 // NYI: This works only for non-oop arrays at present. | |
529 // Generalizing it would be reasonable, but requires card marking. | |
530 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
531 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
532 } | |
533 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
534 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
535 Copy::conjoint_memory_atomic(src, dst, sz); | |
536 UNSAFE_END | |
537 | |
538 | |
539 ////// Random queries | |
540 | |
541 // See comment at file start about UNSAFE_LEAF | |
542 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
543 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
544 UnsafeWrapper("Unsafe_AddressSize"); | |
545 return sizeof(void*); | |
546 UNSAFE_END | |
547 | |
548 // See comment at file start about UNSAFE_LEAF | |
549 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
550 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
551 UnsafeWrapper("Unsafe_PageSize"); | |
552 return os::vm_page_size(); | |
553 UNSAFE_END | |
554 | |
555 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
556 if (field == NULL) { | |
557 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
558 } | |
559 | |
560 oop reflected = JNIHandles::resolve_non_null(field); | |
561 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
562 klassOop k = java_lang_Class::as_klassOop(mirror); | |
563 int slot = java_lang_reflect_Field::slot(reflected); | |
564 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
565 | |
566 if (must_be_static >= 0) { | |
567 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
568 if (must_be_static != really_is_static) { | |
569 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
570 } | |
571 } | |
572 | |
573 int offset = instanceKlass::cast(k)->offset_from_fields(slot); | |
574 return field_offset_from_byte_offset(offset); | |
575 } | |
576 | |
577 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
578 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
579 return find_field_offset(field, 0, THREAD); | |
580 UNSAFE_END | |
581 | |
582 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
583 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
584 return find_field_offset(field, 1, THREAD); | |
585 UNSAFE_END | |
586 | |
587 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
588 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
589 // Note: In this VM implementation, a field address is always a short | |
590 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
591 // range of the return type is never used. However, some implementations | |
592 // might put the static field inside an array shared by many classes, | |
593 // or even at a fixed address, in which case the address could be quite | |
594 // large. In that last case, this function would return NULL, since | |
595 // the address would operate alone, without any base pointer. | |
596 | |
597 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
598 | |
599 oop reflected = JNIHandles::resolve_non_null(field); | |
600 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
601 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
602 | |
603 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
604 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
605 } | |
606 | |
607 return JNIHandles::make_local(env, java_lang_Class::as_klassOop(mirror)); | |
608 UNSAFE_END | |
609 | |
610 //@deprecated | |
611 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
612 UnsafeWrapper("Unsafe_FieldOffset"); | |
613 // tries (but fails) to be polymorphic between static and non-static: | |
614 jlong offset = find_field_offset(field, -1, THREAD); | |
615 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
616 return (jint)offset; | |
617 UNSAFE_END | |
618 | |
619 //@deprecated | |
620 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
621 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
622 if (clazz == NULL) { | |
623 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
624 } | |
625 return JNIHandles::make_local(env, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
626 UNSAFE_END | |
627 | |
628 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) | |
629 UnsafeWrapper("Unsafe_EnsureClassInitialized"); | |
630 if (clazz == NULL) { | |
631 THROW(vmSymbols::java_lang_NullPointerException()); | |
632 } | |
633 oop mirror = JNIHandles::resolve_non_null(clazz); | |
634 instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(mirror)); | |
635 if (k != NULL) { | |
636 k->initialize(CHECK); | |
637 } | |
638 UNSAFE_END | |
639 | |
640 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
641 if (acls == NULL) { | |
642 THROW(vmSymbols::java_lang_NullPointerException()); | |
643 } | |
644 oop mirror = JNIHandles::resolve_non_null(acls); | |
645 klassOop k = java_lang_Class::as_klassOop(mirror); | |
646 if (k == NULL || !k->klass_part()->oop_is_array()) { | |
647 THROW(vmSymbols::java_lang_InvalidClassException()); | |
648 } else if (k->klass_part()->oop_is_objArray()) { | |
649 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); | |
650 scale = oopSize; | |
651 } else if (k->klass_part()->oop_is_typeArray()) { | |
652 typeArrayKlass* tak = typeArrayKlass::cast(k); | |
653 base = tak->array_header_in_bytes(); | |
654 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
655 scale = (1 << tak->log2_element_size()); | |
656 } else { | |
657 ShouldNotReachHere(); | |
658 } | |
659 } | |
660 | |
661 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
662 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
663 int base, scale; | |
664 getBaseAndScale(base, scale, acls, CHECK_0); | |
665 return field_offset_from_byte_offset(base); | |
666 UNSAFE_END | |
667 | |
668 | |
669 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
670 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
671 int base, scale; | |
672 getBaseAndScale(base, scale, acls, CHECK_0); | |
673 // This VM packs both fields and array elements down to the byte. | |
674 // But watch out: If this changes, so that array references for | |
675 // a given primitive type (say, T_BOOLEAN) use different memory units | |
676 // than fields, this method MUST return zero for such arrays. | |
677 // For example, the VM used to store sub-word sized fields in full | |
678 // words in the object layout, so that accessors like getByte(Object,int) | |
679 // did not really do what one might expect for arrays. Therefore, | |
680 // this function used to report a zero scale factor, so that the user | |
681 // would know not to attempt to access sub-word array elements. | |
682 // // Code for unpacked fields: | |
683 // if (scale < wordSize) return 0; | |
684 | |
685 // The following allows for a pretty general fieldOffset cookie scheme, | |
686 // but requires it to be linear in byte offset. | |
687 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
688 UNSAFE_END | |
689 | |
690 | |
691 static inline void throw_new(JNIEnv *env, const char *ename) { | |
692 char buf[100]; | |
693 strcpy(buf, "java/lang/"); | |
694 strcat(buf, ename); | |
695 jclass cls = env->FindClass(buf); | |
696 char* msg = NULL; | |
697 env->ThrowNew(cls, msg); | |
698 } | |
699 | |
700 static jclass Unsafe_DefineClass(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { | |
701 { | |
702 // Code lifted from JDK 1.3 ClassLoader.c | |
703 | |
704 jbyte *body; | |
705 char *utfName; | |
706 jclass result = 0; | |
707 char buf[128]; | |
708 | |
709 if (UsePerfData) { | |
710 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
711 } | |
712 | |
713 if (data == NULL) { | |
714 throw_new(env, "NullPointerException"); | |
715 return 0; | |
716 } | |
717 | |
718 /* Work around 4153825. malloc crashes on Solaris when passed a | |
719 * negative size. | |
720 */ | |
721 if (length < 0) { | |
722 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
723 return 0; | |
724 } | |
725 | |
726 body = NEW_C_HEAP_ARRAY(jbyte, length); | |
727 | |
728 if (body == 0) { | |
729 throw_new(env, "OutOfMemoryError"); | |
730 return 0; | |
731 } | |
732 | |
733 env->GetByteArrayRegion(data, offset, length, body); | |
734 | |
735 if (env->ExceptionOccurred()) | |
736 goto free_body; | |
737 | |
738 if (name != NULL) { | |
739 uint len = env->GetStringUTFLength(name); | |
740 int unicode_len = env->GetStringLength(name); | |
741 if (len >= sizeof(buf)) { | |
742 utfName = NEW_C_HEAP_ARRAY(char, len + 1); | |
743 if (utfName == NULL) { | |
744 throw_new(env, "OutOfMemoryError"); | |
745 goto free_body; | |
746 } | |
747 } else { | |
748 utfName = buf; | |
749 } | |
750 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
751 //VerifyFixClassname(utfName); | |
752 for (uint i = 0; i < len; i++) { | |
753 if (utfName[i] == '.') utfName[i] = '/'; | |
754 } | |
755 } else { | |
756 utfName = NULL; | |
757 } | |
758 | |
759 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
760 | |
761 if (utfName && utfName != buf) | |
762 FREE_C_HEAP_ARRAY(char, utfName); | |
763 | |
764 free_body: | |
765 FREE_C_HEAP_ARRAY(jbyte, body); | |
766 return result; | |
767 } | |
768 } | |
769 | |
770 | |
771 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) | |
772 UnsafeWrapper("Unsafe_DefineClass"); | |
773 { | |
774 ThreadToNativeFromVM ttnfv(thread); | |
775 | |
776 int depthFromDefineClass0 = 1; | |
777 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
778 jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller); | |
779 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); | |
780 | |
781 return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); | |
782 } | |
783 UNSAFE_END | |
784 | |
785 | |
786 UNSAFE_ENTRY(jclass, Unsafe_DefineClass1(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd)) | |
787 UnsafeWrapper("Unsafe_DefineClass"); | |
788 { | |
789 ThreadToNativeFromVM ttnfv(thread); | |
790 | |
791 return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); | |
792 } | |
793 UNSAFE_END | |
794 | |
795 | |
796 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
797 UnsafeWrapper("Unsafe_MonitorEnter"); | |
798 { | |
799 if (jobj == NULL) { | |
800 THROW(vmSymbols::java_lang_NullPointerException()); | |
801 } | |
802 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
803 ObjectSynchronizer::jni_enter(obj, CHECK); | |
804 } | |
805 UNSAFE_END | |
806 | |
807 | |
808 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
809 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
810 { | |
811 if (jobj == NULL) { | |
812 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
813 } | |
814 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
815 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
816 return (res ? JNI_TRUE : JNI_FALSE); | |
817 } | |
818 UNSAFE_END | |
819 | |
820 | |
821 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
822 UnsafeWrapper("Unsafe_MonitorExit"); | |
823 { | |
824 if (jobj == NULL) { | |
825 THROW(vmSymbols::java_lang_NullPointerException()); | |
826 } | |
827 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
828 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
829 } | |
830 UNSAFE_END | |
831 | |
832 | |
833 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
834 UnsafeWrapper("Unsafe_ThrowException"); | |
835 { | |
836 ThreadToNativeFromVM ttnfv(thread); | |
837 env->Throw(thr); | |
838 } | |
839 UNSAFE_END | |
840 | |
841 // JSR166 ------------------------------------------------------------------ | |
842 | |
843 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
844 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
845 oop x = JNIHandles::resolve(x_h); | |
846 oop e = JNIHandles::resolve(e_h); | |
847 oop p = JNIHandles::resolve(obj); | |
848 intptr_t* addr = (intptr_t *)index_oop_from_field_offset_long(p, offset); | |
849 intptr_t res = Atomic::cmpxchg_ptr((intptr_t)x, addr, (intptr_t)e); | |
850 jboolean success = (res == (intptr_t)e); | |
851 if (success) | |
852 update_barrier_set((oop*)addr, x); | |
853 return success; | |
854 UNSAFE_END | |
855 | |
856 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
857 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
858 oop p = JNIHandles::resolve(obj); | |
859 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
860 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
861 UNSAFE_END | |
862 | |
863 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
864 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
865 Handle p (THREAD, JNIHandles::resolve(obj)); | |
866 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
867 if (VM_Version::supports_cx8()) | |
868 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
869 else { | |
870 jboolean success = false; | |
871 ObjectLocker ol(p, THREAD); | |
872 if (*addr == e) { *addr = x; success = true; } | |
873 return success; | |
874 } | |
875 UNSAFE_END | |
876 | |
877 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
878 UnsafeWrapper("Unsafe_Park"); | |
879 JavaThreadParkedState jtps(thread, time != 0); | |
880 thread->parker()->park(isAbsolute != 0, time); | |
881 UNSAFE_END | |
882 | |
883 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
884 UnsafeWrapper("Unsafe_Unpark"); | |
885 Parker* p = NULL; | |
886 if (jthread != NULL) { | |
887 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
888 if (java_thread != NULL) { | |
889 jlong lp = java_lang_Thread::park_event(java_thread); | |
890 if (lp != 0) { | |
891 // This cast is OK even though the jlong might have been read | |
892 // non-atomically on 32bit systems, since there, one word will | |
893 // always be zero anyway and the value set is always the same | |
894 p = (Parker*)addr_from_java(lp); | |
895 } else { | |
896 // Grab lock if apparently null or using older version of library | |
897 MutexLocker mu(Threads_lock); | |
898 java_thread = JNIHandles::resolve_non_null(jthread); | |
899 if (java_thread != NULL) { | |
900 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
901 if (thr != NULL) { | |
902 p = thr->parker(); | |
903 if (p != NULL) { // Bind to Java thread for next time. | |
904 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
905 } | |
906 } | |
907 } | |
908 } | |
909 } | |
910 } | |
911 if (p != NULL) { | |
912 p->unpark(); | |
913 } | |
914 UNSAFE_END | |
915 | |
916 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
917 UnsafeWrapper("Unsafe_Loadavg"); | |
918 const int max_nelem = 3; | |
919 double la[max_nelem]; | |
920 jint ret; | |
921 | |
922 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
923 assert(a->is_typeArray(), "must be type array"); | |
924 | |
925 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
926 ThreadToNativeFromVM ttnfv(thread); | |
927 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
928 return -1; | |
929 } | |
930 | |
931 ret = os::loadavg(la, nelem); | |
932 if (ret == -1) return -1; | |
933 | |
934 // if successful, ret is the number of samples actually retrieved. | |
935 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
936 switch(ret) { | |
937 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
938 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
939 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
940 } | |
941 return ret; | |
942 UNSAFE_END | |
943 | |
944 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
945 UnsafeWrapper("Unsafe_PrefetchRead"); | |
946 oop p = JNIHandles::resolve(obj); | |
947 void* addr = index_oop_from_field_offset_long(p, 0); | |
948 Prefetch::read(addr, (intx)offset); | |
949 UNSAFE_END | |
950 | |
951 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
952 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
953 oop p = JNIHandles::resolve(obj); | |
954 void* addr = index_oop_from_field_offset_long(p, 0); | |
955 Prefetch::write(addr, (intx)offset); | |
956 UNSAFE_END | |
957 | |
958 | |
959 /// JVM_RegisterUnsafeMethods | |
960 | |
961 #define ADR "J" | |
962 | |
963 #define LANG "Ljava/lang/" | |
964 | |
965 #define OBJ LANG"Object;" | |
966 #define CLS LANG"Class;" | |
967 #define CTR LANG"reflect/Constructor;" | |
968 #define FLD LANG"reflect/Field;" | |
969 #define MTH LANG"reflect/Method;" | |
970 #define THR LANG"Throwable;" | |
971 | |
972 #define DC0_Args LANG"String;[BII" | |
973 #define DC1_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" | |
974 | |
975 #define CC (char*) /*cast a literal from (const char*)*/ | |
976 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
977 | |
978 // define deprecated accessors for compabitility with 1.4.0 | |
979 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
980 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
981 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
982 | |
983 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
984 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
985 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
986 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
987 | |
988 // Note: In 1.5.0, there are volatile versions too | |
989 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
990 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
991 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
992 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
993 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
994 | |
995 | |
996 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
997 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
998 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
999 | |
1000 | |
1001 | |
1002 // %%% These are temporarily supported until the SDK sources | |
1003 // contain the necessarily updated Unsafe.java. | |
1004 static JNINativeMethod methods_140[] = { | |
1005 | |
1006 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
1007 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
1008 | |
1009 DECLARE_GETSETOOP_140(Boolean, Z), | |
1010 DECLARE_GETSETOOP_140(Byte, B), | |
1011 DECLARE_GETSETOOP_140(Short, S), | |
1012 DECLARE_GETSETOOP_140(Char, C), | |
1013 DECLARE_GETSETOOP_140(Int, I), | |
1014 DECLARE_GETSETOOP_140(Long, J), | |
1015 DECLARE_GETSETOOP_140(Float, F), | |
1016 DECLARE_GETSETOOP_140(Double, D), | |
1017 | |
1018 DECLARE_GETSETNATIVE(Byte, B), | |
1019 DECLARE_GETSETNATIVE(Short, S), | |
1020 DECLARE_GETSETNATIVE(Char, C), | |
1021 DECLARE_GETSETNATIVE(Int, I), | |
1022 DECLARE_GETSETNATIVE(Long, J), | |
1023 DECLARE_GETSETNATIVE(Float, F), | |
1024 DECLARE_GETSETNATIVE(Double, D), | |
1025 | |
1026 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1027 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1028 | |
1029 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1030 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1031 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1032 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1033 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1034 | |
1035 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, //deprecated | |
1036 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, //deprecated | |
1037 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1038 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1039 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1040 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1041 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1042 | |
1043 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1044 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1045 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1046 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1047 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1048 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1049 }; | |
1050 | |
1051 // These are the old methods prior to the JSR 166 changes in 1.5.0 | |
1052 static JNINativeMethod methods_141[] = { | |
1053 | |
1054 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1055 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1056 | |
1057 DECLARE_GETSETOOP_141(Boolean, Z), | |
1058 DECLARE_GETSETOOP_141(Byte, B), | |
1059 DECLARE_GETSETOOP_141(Short, S), | |
1060 DECLARE_GETSETOOP_141(Char, C), | |
1061 DECLARE_GETSETOOP_141(Int, I), | |
1062 DECLARE_GETSETOOP_141(Long, J), | |
1063 DECLARE_GETSETOOP_141(Float, F), | |
1064 DECLARE_GETSETOOP_141(Double, D), | |
1065 | |
1066 DECLARE_GETSETNATIVE(Byte, B), | |
1067 DECLARE_GETSETNATIVE(Short, S), | |
1068 DECLARE_GETSETNATIVE(Char, C), | |
1069 DECLARE_GETSETNATIVE(Int, I), | |
1070 DECLARE_GETSETNATIVE(Long, J), | |
1071 DECLARE_GETSETNATIVE(Float, F), | |
1072 DECLARE_GETSETNATIVE(Double, D), | |
1073 | |
1074 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1075 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1076 | |
1077 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1078 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1079 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1080 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1081 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1082 | |
1083 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1084 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1085 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1086 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1087 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1088 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1089 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1090 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1091 | |
1092 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1093 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1094 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1095 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1096 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1097 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1098 | |
1099 }; | |
1100 | |
1101 // These are the old methods prior to the JSR 166 changes in 1.6.0 | |
1102 static JNINativeMethod methods_15[] = { | |
1103 | |
1104 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1105 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1106 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1107 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1108 | |
1109 | |
1110 DECLARE_GETSETOOP(Boolean, Z), | |
1111 DECLARE_GETSETOOP(Byte, B), | |
1112 DECLARE_GETSETOOP(Short, S), | |
1113 DECLARE_GETSETOOP(Char, C), | |
1114 DECLARE_GETSETOOP(Int, I), | |
1115 DECLARE_GETSETOOP(Long, J), | |
1116 DECLARE_GETSETOOP(Float, F), | |
1117 DECLARE_GETSETOOP(Double, D), | |
1118 | |
1119 DECLARE_GETSETNATIVE(Byte, B), | |
1120 DECLARE_GETSETNATIVE(Short, S), | |
1121 DECLARE_GETSETNATIVE(Char, C), | |
1122 DECLARE_GETSETNATIVE(Int, I), | |
1123 DECLARE_GETSETNATIVE(Long, J), | |
1124 DECLARE_GETSETNATIVE(Float, F), | |
1125 DECLARE_GETSETNATIVE(Double, D), | |
1126 | |
1127 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1128 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1129 | |
1130 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1131 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1132 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1133 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1134 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1135 | |
1136 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1137 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1138 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1139 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1140 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1141 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1142 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1143 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1144 | |
1145 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1146 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1147 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1148 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1149 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1150 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1151 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1152 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1153 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1154 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1155 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1156 | |
1157 }; | |
1158 | |
1159 // These are the correct methods, moving forward: | |
1160 static JNINativeMethod methods[] = { | |
1161 | |
1162 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1163 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1164 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1165 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1166 | |
1167 | |
1168 DECLARE_GETSETOOP(Boolean, Z), | |
1169 DECLARE_GETSETOOP(Byte, B), | |
1170 DECLARE_GETSETOOP(Short, S), | |
1171 DECLARE_GETSETOOP(Char, C), | |
1172 DECLARE_GETSETOOP(Int, I), | |
1173 DECLARE_GETSETOOP(Long, J), | |
1174 DECLARE_GETSETOOP(Float, F), | |
1175 DECLARE_GETSETOOP(Double, D), | |
1176 | |
1177 DECLARE_GETSETNATIVE(Byte, B), | |
1178 DECLARE_GETSETNATIVE(Short, S), | |
1179 DECLARE_GETSETNATIVE(Char, C), | |
1180 DECLARE_GETSETNATIVE(Int, I), | |
1181 DECLARE_GETSETNATIVE(Long, J), | |
1182 DECLARE_GETSETNATIVE(Float, F), | |
1183 DECLARE_GETSETNATIVE(Double, D), | |
1184 | |
1185 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1186 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1187 | |
1188 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1189 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1190 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1191 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1192 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1193 | |
1194 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1195 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1196 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1197 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1198 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1199 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1200 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1201 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1202 | |
1203 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1204 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1205 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1206 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1207 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1208 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
1209 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1210 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1211 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1212 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1213 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
1214 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
1215 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
1216 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1217 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1218 | |
1219 // {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)}, | |
1220 | |
1221 // {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1222 // {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1223 // {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1224 // {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1225 | |
1226 }; | |
1227 | |
1228 JNINativeMethod loadavg_method[] = { | |
1229 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} | |
1230 }; | |
1231 | |
1232 JNINativeMethod prefetch_methods[] = { | |
1233 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1234 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
1235 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1236 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1237 }; | |
1238 | |
1239 JNINativeMethod memcopy_methods[] = { | |
1240 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, | |
1241 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
1242 }; | |
1243 | |
1244 JNINativeMethod memcopy_methods_15[] = { | |
1245 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1246 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
1247 }; | |
1248 | |
1249 | |
1250 #undef CC | |
1251 #undef FN_PTR | |
1252 | |
1253 #undef ADR | |
1254 #undef LANG | |
1255 #undef OBJ | |
1256 #undef CLS | |
1257 #undef CTR | |
1258 #undef FLD | |
1259 #undef MTH | |
1260 #undef THR | |
1261 #undef DC0_Args | |
1262 #undef DC1_Args | |
1263 | |
1264 #undef DECLARE_GETSETOOP | |
1265 #undef DECLARE_GETSETNATIVE | |
1266 | |
1267 | |
1268 // This one function is exported, used by NativeLookup. | |
1269 // The Unsafe_xxx functions above are called only from the interpreter. | |
1270 // The optimizer looks at names and signatures to recognize | |
1271 // individual functions. | |
1272 | |
1273 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
1274 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
1275 { | |
1276 ThreadToNativeFromVM ttnfv(thread); | |
1277 { | |
1278 env->RegisterNatives(unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); | |
1279 if (env->ExceptionOccurred()) { | |
1280 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1281 tty->print_cr("Warning: SDK 1.6 Unsafe.loadavg not found."); | |
1282 } | |
1283 env->ExceptionClear(); | |
1284 } | |
1285 } | |
1286 { | |
1287 env->RegisterNatives(unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); | |
1288 if (env->ExceptionOccurred()) { | |
1289 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1290 tty->print_cr("Warning: SDK 1.6 Unsafe.prefetchRead/Write not found."); | |
1291 } | |
1292 env->ExceptionClear(); | |
1293 } | |
1294 } | |
1295 { | |
1296 env->RegisterNatives(unsafecls, memcopy_methods, sizeof(memcopy_methods)/sizeof(JNINativeMethod)); | |
1297 if (env->ExceptionOccurred()) { | |
1298 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1299 tty->print_cr("Warning: SDK 1.7 Unsafe.copyMemory not found."); | |
1300 } | |
1301 env->ExceptionClear(); | |
1302 env->RegisterNatives(unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); | |
1303 if (env->ExceptionOccurred()) { | |
1304 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1305 tty->print_cr("Warning: SDK 1.5 Unsafe.copyMemory not found."); | |
1306 } | |
1307 env->ExceptionClear(); | |
1308 } | |
1309 } | |
1310 } | |
1311 int status = env->RegisterNatives(unsafecls, methods, sizeof(methods)/sizeof(JNINativeMethod)); | |
1312 if (env->ExceptionOccurred()) { | |
1313 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1314 tty->print_cr("Warning: SDK 1.6 version of Unsafe not found."); | |
1315 } | |
1316 env->ExceptionClear(); | |
1317 // %%% For now, be backward compatible with an older class: | |
1318 status = env->RegisterNatives(unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); | |
1319 } | |
1320 if (env->ExceptionOccurred()) { | |
1321 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1322 tty->print_cr("Warning: SDK 1.5 version of Unsafe not found."); | |
1323 } | |
1324 env->ExceptionClear(); | |
1325 // %%% For now, be backward compatible with an older class: | |
1326 status = env->RegisterNatives(unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); | |
1327 } | |
1328 if (env->ExceptionOccurred()) { | |
1329 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1330 tty->print_cr("Warning: SDK 1.4.1 version of Unsafe not found."); | |
1331 } | |
1332 env->ExceptionClear(); | |
1333 // %%% For now, be backward compatible with an older class: | |
1334 status = env->RegisterNatives(unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); | |
1335 } | |
1336 guarantee(status == 0, "register unsafe natives"); | |
1337 } | |
1338 JVM_END |