Mercurial > hg > graal-jvmci-8
annotate src/share/vm/prims/unsafe.cpp @ 351:fab5f738c515
Merge
author | ysr |
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date | Tue, 01 Jul 2008 11:59:44 -0700 |
parents | 37f87013dfd8 |
children | 1ee8caae33af |
rev | line source |
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0 | 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; | |
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103 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
0 | 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 | |
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149 // Macros for oops that check UseCompressedOops |
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150 |
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151 #define GET_OOP_FIELD(obj, offset, v) \ |
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152 oop p = JNIHandles::resolve(obj); \ |
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153 oop v; \ |
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154 if (UseCompressedOops) { \ |
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155 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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156 v = oopDesc::decode_heap_oop(n); \ |
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157 } else { \ |
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158 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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159 } |
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160 |
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161 #define GET_OOP_FIELD_VOLATILE(obj, offset, v) \ |
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162 oop p = JNIHandles::resolve(obj); \ |
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163 volatile oop v; \ |
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164 if (UseCompressedOops) { \ |
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165 volatile narrowOop n = *(volatile narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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166 v = oopDesc::decode_heap_oop(n); \ |
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167 } else { \ |
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168 v = *(volatile oop*)index_oop_from_field_offset_long(p, offset); \ |
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169 } |
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170 |
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171 |
0 | 172 // Get/SetObject must be special-cased, since it works with handles. |
173 | |
174 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
175 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
176 UnsafeWrapper("Unsafe_GetObject"); | |
177 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
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178 GET_OOP_FIELD(obj, offset, v) |
0 | 179 return JNIHandles::make_local(env, v); |
180 UNSAFE_END | |
181 | |
182 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
183 UnsafeWrapper("Unsafe_SetObject"); | |
184 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
185 oop x = JNIHandles::resolve(x_h); | |
186 //SET_FIELD(obj, offset, oop, x); | |
187 oop p = JNIHandles::resolve(obj); | |
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188 if (UseCompressedOops) { |
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189 if (x != NULL) { |
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190 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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191 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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192 } else { |
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193 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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194 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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195 } |
0 | 196 } else { |
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197 if (x != NULL) { |
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198 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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199 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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200 } else { |
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201 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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202 } |
0 | 203 } |
204 UNSAFE_END | |
205 | |
206 // The normal variants allow a null base pointer with an arbitrary address. | |
207 // But if the base pointer is non-null, the offset should make some sense. | |
208 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
209 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
210 UnsafeWrapper("Unsafe_GetObject"); | |
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211 GET_OOP_FIELD(obj, offset, v) |
0 | 212 return JNIHandles::make_local(env, v); |
213 UNSAFE_END | |
214 | |
215 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
216 UnsafeWrapper("Unsafe_SetObject"); | |
217 oop x = JNIHandles::resolve(x_h); | |
218 oop p = JNIHandles::resolve(obj); | |
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219 if (UseCompressedOops) { |
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220 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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221 } else { |
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222 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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223 } |
0 | 224 UNSAFE_END |
225 | |
226 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
227 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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228 GET_OOP_FIELD_VOLATILE(obj, offset, v) |
0 | 229 return JNIHandles::make_local(env, v); |
230 UNSAFE_END | |
231 | |
232 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
233 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
234 oop x = JNIHandles::resolve(x_h); | |
235 oop p = JNIHandles::resolve(obj); | |
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236 if (UseCompressedOops) { |
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237 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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238 } else { |
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239 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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240 } |
0 | 241 OrderAccess::fence(); |
242 UNSAFE_END | |
243 | |
244 // Volatile long versions must use locks if !VM_Version::supports_cx8(). | |
245 // support_cx8 is a surrogate for 'supports atomic long memory ops'. | |
246 | |
247 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
248 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
249 { | |
250 if (VM_Version::supports_cx8()) { | |
251 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
252 return v; | |
253 } | |
254 else { | |
255 Handle p (THREAD, JNIHandles::resolve(obj)); | |
256 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
257 ObjectLocker ol(p, THREAD); | |
258 jlong value = *addr; | |
259 return value; | |
260 } | |
261 } | |
262 UNSAFE_END | |
263 | |
264 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
265 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
266 { | |
267 if (VM_Version::supports_cx8()) { | |
268 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
269 } | |
270 else { | |
271 Handle p (THREAD, JNIHandles::resolve(obj)); | |
272 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
273 ObjectLocker ol(p, THREAD); | |
274 *addr = x; | |
275 } | |
276 } | |
277 UNSAFE_END | |
278 | |
279 | |
280 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
281 \ | |
282 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
283 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
284 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
285 GET_FIELD(obj, offset, jboolean, v); \ | |
286 return v; \ | |
287 UNSAFE_END \ | |
288 \ | |
289 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
290 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
291 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
292 SET_FIELD(obj, offset, jboolean, x); \ | |
293 UNSAFE_END \ | |
294 \ | |
295 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
296 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
297 GET_FIELD(obj, offset, jboolean, v); \ | |
298 return v; \ | |
299 UNSAFE_END \ | |
300 \ | |
301 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
302 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
303 SET_FIELD(obj, offset, jboolean, x); \ | |
304 UNSAFE_END \ | |
305 \ | |
306 // END DEFINE_GETSETOOP. | |
307 | |
308 | |
309 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
310 \ | |
311 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
312 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
313 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
314 return v; \ | |
315 UNSAFE_END \ | |
316 \ | |
317 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
318 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
319 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
320 UNSAFE_END \ | |
321 \ | |
322 // END DEFINE_GETSETOOP_VOLATILE. | |
323 | |
324 DEFINE_GETSETOOP(jboolean, Boolean) | |
325 DEFINE_GETSETOOP(jbyte, Byte) | |
326 DEFINE_GETSETOOP(jshort, Short); | |
327 DEFINE_GETSETOOP(jchar, Char); | |
328 DEFINE_GETSETOOP(jint, Int); | |
329 DEFINE_GETSETOOP(jlong, Long); | |
330 DEFINE_GETSETOOP(jfloat, Float); | |
331 DEFINE_GETSETOOP(jdouble, Double); | |
332 | |
333 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
334 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
335 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
336 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
337 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
338 // no long -- handled specially | |
339 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
340 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
341 | |
342 #undef DEFINE_GETSETOOP | |
343 | |
344 // The non-intrinsified versions of setOrdered just use setVolatile | |
345 | |
346 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) \ | |
347 UnsafeWrapper("Unsafe_SetOrderedInt"); \ | |
348 SET_FIELD_VOLATILE(obj, offset, jint, x); \ | |
349 UNSAFE_END | |
350 | |
351 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
352 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
353 oop x = JNIHandles::resolve(x_h); | |
354 oop p = JNIHandles::resolve(obj); | |
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355 if (UseCompressedOops) { |
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356 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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357 } else { |
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358 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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359 } |
0 | 360 OrderAccess::fence(); |
361 UNSAFE_END | |
362 | |
363 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
364 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
365 { | |
366 if (VM_Version::supports_cx8()) { | |
367 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
368 } | |
369 else { | |
370 Handle p (THREAD, JNIHandles::resolve(obj)); | |
371 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
372 ObjectLocker ol(p, THREAD); | |
373 *addr = x; | |
374 } | |
375 } | |
376 UNSAFE_END | |
377 | |
378 ////// Data in the C heap. | |
379 | |
380 // Note: These do not throw NullPointerException for bad pointers. | |
381 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
382 // | |
383 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
384 \ | |
385 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
386 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
387 void* p = addr_from_java(addr); \ | |
388 JavaThread* t = JavaThread::current(); \ | |
389 t->set_doing_unsafe_access(true); \ | |
390 java_type x = *(volatile native_type*)p; \ | |
391 t->set_doing_unsafe_access(false); \ | |
392 return x; \ | |
393 UNSAFE_END \ | |
394 \ | |
395 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
396 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
397 JavaThread* t = JavaThread::current(); \ | |
398 t->set_doing_unsafe_access(true); \ | |
399 void* p = addr_from_java(addr); \ | |
400 *(volatile native_type*)p = x; \ | |
401 t->set_doing_unsafe_access(false); \ | |
402 UNSAFE_END \ | |
403 \ | |
404 // END DEFINE_GETSETNATIVE. | |
405 | |
406 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
407 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
408 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
409 DEFINE_GETSETNATIVE(jint, Int, jint); | |
410 // no long -- handled specially | |
411 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
412 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
413 | |
414 #undef DEFINE_GETSETNATIVE | |
415 | |
416 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
417 UnsafeWrapper("Unsafe_GetNativeLong"); | |
418 JavaThread* t = JavaThread::current(); | |
419 // We do it this way to avoid problems with access to heap using 64 | |
420 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
421 // some CPUs (SPARC) it leads to SIGBUS. | |
422 t->set_doing_unsafe_access(true); | |
423 void* p = addr_from_java(addr); | |
424 jlong x; | |
425 if (((intptr_t)p & 7) == 0) { | |
426 // jlong is aligned, do a volatile access | |
427 x = *(volatile jlong*)p; | |
428 } else { | |
429 jlong_accessor acc; | |
430 acc.words[0] = ((volatile jint*)p)[0]; | |
431 acc.words[1] = ((volatile jint*)p)[1]; | |
432 x = acc.long_value; | |
433 } | |
434 t->set_doing_unsafe_access(false); | |
435 return x; | |
436 UNSAFE_END | |
437 | |
438 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
439 UnsafeWrapper("Unsafe_SetNativeLong"); | |
440 JavaThread* t = JavaThread::current(); | |
441 // see comment for Unsafe_GetNativeLong | |
442 t->set_doing_unsafe_access(true); | |
443 void* p = addr_from_java(addr); | |
444 if (((intptr_t)p & 7) == 0) { | |
445 // jlong is aligned, do a volatile access | |
446 *(volatile jlong*)p = x; | |
447 } else { | |
448 jlong_accessor acc; | |
449 acc.long_value = x; | |
450 ((volatile jint*)p)[0] = acc.words[0]; | |
451 ((volatile jint*)p)[1] = acc.words[1]; | |
452 } | |
453 t->set_doing_unsafe_access(false); | |
454 UNSAFE_END | |
455 | |
456 | |
457 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
458 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
459 void* p = addr_from_java(addr); | |
460 return addr_to_java(*(void**)p); | |
461 UNSAFE_END | |
462 | |
463 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
464 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
465 void* p = addr_from_java(addr); | |
466 *(void**)p = addr_from_java(x); | |
467 UNSAFE_END | |
468 | |
469 | |
470 ////// Allocation requests | |
471 | |
472 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
473 UnsafeWrapper("Unsafe_AllocateInstance"); | |
474 { | |
475 ThreadToNativeFromVM ttnfv(thread); | |
476 return env->AllocObject(cls); | |
477 } | |
478 UNSAFE_END | |
479 | |
480 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
481 UnsafeWrapper("Unsafe_AllocateMemory"); | |
482 size_t sz = (size_t)size; | |
483 if (sz != (julong)size || size < 0) { | |
484 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
485 } | |
486 if (sz == 0) { | |
487 return 0; | |
488 } | |
489 sz = round_to(sz, HeapWordSize); | |
490 void* x = os::malloc(sz); | |
491 if (x == NULL) { | |
492 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
493 } | |
494 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
495 return addr_to_java(x); | |
496 UNSAFE_END | |
497 | |
498 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
499 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
500 void* p = addr_from_java(addr); | |
501 size_t sz = (size_t)size; | |
502 if (sz != (julong)size || size < 0) { | |
503 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
504 } | |
505 if (sz == 0) { | |
506 os::free(p); | |
507 return 0; | |
508 } | |
509 sz = round_to(sz, HeapWordSize); | |
510 void* x = (p == NULL) ? os::malloc(sz) : os::realloc(p, sz); | |
511 if (x == NULL) { | |
512 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
513 } | |
514 return addr_to_java(x); | |
515 UNSAFE_END | |
516 | |
517 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
518 UnsafeWrapper("Unsafe_FreeMemory"); | |
519 void* p = addr_from_java(addr); | |
520 if (p == NULL) { | |
521 return; | |
522 } | |
523 os::free(p); | |
524 UNSAFE_END | |
525 | |
526 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
527 UnsafeWrapper("Unsafe_SetMemory"); | |
528 size_t sz = (size_t)size; | |
529 if (sz != (julong)size || size < 0) { | |
530 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
531 } | |
532 char* p = (char*) addr_from_java(addr); | |
533 Copy::fill_to_memory_atomic(p, sz, value); | |
534 UNSAFE_END | |
535 | |
536 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
537 UnsafeWrapper("Unsafe_SetMemory"); | |
538 size_t sz = (size_t)size; | |
539 if (sz != (julong)size || size < 0) { | |
540 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
541 } | |
542 oop base = JNIHandles::resolve(obj); | |
543 void* p = index_oop_from_field_offset_long(base, offset); | |
544 Copy::fill_to_memory_atomic(p, sz, value); | |
545 UNSAFE_END | |
546 | |
547 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
548 UnsafeWrapper("Unsafe_CopyMemory"); | |
549 if (size == 0) { | |
550 return; | |
551 } | |
552 size_t sz = (size_t)size; | |
553 if (sz != (julong)size || size < 0) { | |
554 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
555 } | |
556 void* src = addr_from_java(srcAddr); | |
557 void* dst = addr_from_java(dstAddr); | |
558 Copy::conjoint_memory_atomic(src, dst, sz); | |
559 UNSAFE_END | |
560 | |
561 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
562 UnsafeWrapper("Unsafe_CopyMemory"); | |
563 if (size == 0) { | |
564 return; | |
565 } | |
566 size_t sz = (size_t)size; | |
567 if (sz != (julong)size || size < 0) { | |
568 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
569 } | |
570 oop srcp = JNIHandles::resolve(srcObj); | |
571 oop dstp = JNIHandles::resolve(dstObj); | |
572 if (dstp != NULL && !dstp->is_typeArray()) { | |
573 // NYI: This works only for non-oop arrays at present. | |
574 // Generalizing it would be reasonable, but requires card marking. | |
575 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
576 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
577 } | |
578 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
579 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
580 Copy::conjoint_memory_atomic(src, dst, sz); | |
581 UNSAFE_END | |
582 | |
583 | |
584 ////// Random queries | |
585 | |
586 // See comment at file start about UNSAFE_LEAF | |
587 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
588 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
589 UnsafeWrapper("Unsafe_AddressSize"); | |
590 return sizeof(void*); | |
591 UNSAFE_END | |
592 | |
593 // See comment at file start about UNSAFE_LEAF | |
594 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
595 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
596 UnsafeWrapper("Unsafe_PageSize"); | |
597 return os::vm_page_size(); | |
598 UNSAFE_END | |
599 | |
600 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
601 if (field == NULL) { | |
602 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
603 } | |
604 | |
605 oop reflected = JNIHandles::resolve_non_null(field); | |
606 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
607 klassOop k = java_lang_Class::as_klassOop(mirror); | |
608 int slot = java_lang_reflect_Field::slot(reflected); | |
609 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
610 | |
611 if (must_be_static >= 0) { | |
612 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
613 if (must_be_static != really_is_static) { | |
614 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
615 } | |
616 } | |
617 | |
618 int offset = instanceKlass::cast(k)->offset_from_fields(slot); | |
619 return field_offset_from_byte_offset(offset); | |
620 } | |
621 | |
622 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
623 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
624 return find_field_offset(field, 0, THREAD); | |
625 UNSAFE_END | |
626 | |
627 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
628 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
629 return find_field_offset(field, 1, THREAD); | |
630 UNSAFE_END | |
631 | |
632 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
633 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
634 // Note: In this VM implementation, a field address is always a short | |
635 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
636 // range of the return type is never used. However, some implementations | |
637 // might put the static field inside an array shared by many classes, | |
638 // or even at a fixed address, in which case the address could be quite | |
639 // large. In that last case, this function would return NULL, since | |
640 // the address would operate alone, without any base pointer. | |
641 | |
642 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
643 | |
644 oop reflected = JNIHandles::resolve_non_null(field); | |
645 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
646 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
647 | |
648 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
649 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
650 } | |
651 | |
652 return JNIHandles::make_local(env, java_lang_Class::as_klassOop(mirror)); | |
653 UNSAFE_END | |
654 | |
655 //@deprecated | |
656 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
657 UnsafeWrapper("Unsafe_FieldOffset"); | |
658 // tries (but fails) to be polymorphic between static and non-static: | |
659 jlong offset = find_field_offset(field, -1, THREAD); | |
660 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
661 return (jint)offset; | |
662 UNSAFE_END | |
663 | |
664 //@deprecated | |
665 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
666 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
667 if (clazz == NULL) { | |
668 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
669 } | |
670 return JNIHandles::make_local(env, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
671 UNSAFE_END | |
672 | |
673 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) | |
674 UnsafeWrapper("Unsafe_EnsureClassInitialized"); | |
675 if (clazz == NULL) { | |
676 THROW(vmSymbols::java_lang_NullPointerException()); | |
677 } | |
678 oop mirror = JNIHandles::resolve_non_null(clazz); | |
679 instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(mirror)); | |
680 if (k != NULL) { | |
681 k->initialize(CHECK); | |
682 } | |
683 UNSAFE_END | |
684 | |
685 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
686 if (acls == NULL) { | |
687 THROW(vmSymbols::java_lang_NullPointerException()); | |
688 } | |
689 oop mirror = JNIHandles::resolve_non_null(acls); | |
690 klassOop k = java_lang_Class::as_klassOop(mirror); | |
691 if (k == NULL || !k->klass_part()->oop_is_array()) { | |
692 THROW(vmSymbols::java_lang_InvalidClassException()); | |
693 } else if (k->klass_part()->oop_is_objArray()) { | |
694 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); | |
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695 scale = heapOopSize; |
0 | 696 } else if (k->klass_part()->oop_is_typeArray()) { |
697 typeArrayKlass* tak = typeArrayKlass::cast(k); | |
698 base = tak->array_header_in_bytes(); | |
699 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
700 scale = (1 << tak->log2_element_size()); | |
701 } else { | |
702 ShouldNotReachHere(); | |
703 } | |
704 } | |
705 | |
706 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
707 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
708 int base, scale; | |
709 getBaseAndScale(base, scale, acls, CHECK_0); | |
710 return field_offset_from_byte_offset(base); | |
711 UNSAFE_END | |
712 | |
713 | |
714 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
715 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
716 int base, scale; | |
717 getBaseAndScale(base, scale, acls, CHECK_0); | |
718 // This VM packs both fields and array elements down to the byte. | |
719 // But watch out: If this changes, so that array references for | |
720 // a given primitive type (say, T_BOOLEAN) use different memory units | |
721 // than fields, this method MUST return zero for such arrays. | |
722 // For example, the VM used to store sub-word sized fields in full | |
723 // words in the object layout, so that accessors like getByte(Object,int) | |
724 // did not really do what one might expect for arrays. Therefore, | |
725 // this function used to report a zero scale factor, so that the user | |
726 // would know not to attempt to access sub-word array elements. | |
727 // // Code for unpacked fields: | |
728 // if (scale < wordSize) return 0; | |
729 | |
730 // The following allows for a pretty general fieldOffset cookie scheme, | |
731 // but requires it to be linear in byte offset. | |
732 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
733 UNSAFE_END | |
734 | |
735 | |
736 static inline void throw_new(JNIEnv *env, const char *ename) { | |
737 char buf[100]; | |
738 strcpy(buf, "java/lang/"); | |
739 strcat(buf, ename); | |
740 jclass cls = env->FindClass(buf); | |
741 char* msg = NULL; | |
742 env->ThrowNew(cls, msg); | |
743 } | |
744 | |
745 static jclass Unsafe_DefineClass(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { | |
746 { | |
747 // Code lifted from JDK 1.3 ClassLoader.c | |
748 | |
749 jbyte *body; | |
750 char *utfName; | |
751 jclass result = 0; | |
752 char buf[128]; | |
753 | |
754 if (UsePerfData) { | |
755 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
756 } | |
757 | |
758 if (data == NULL) { | |
759 throw_new(env, "NullPointerException"); | |
760 return 0; | |
761 } | |
762 | |
763 /* Work around 4153825. malloc crashes on Solaris when passed a | |
764 * negative size. | |
765 */ | |
766 if (length < 0) { | |
767 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
768 return 0; | |
769 } | |
770 | |
771 body = NEW_C_HEAP_ARRAY(jbyte, length); | |
772 | |
773 if (body == 0) { | |
774 throw_new(env, "OutOfMemoryError"); | |
775 return 0; | |
776 } | |
777 | |
778 env->GetByteArrayRegion(data, offset, length, body); | |
779 | |
780 if (env->ExceptionOccurred()) | |
781 goto free_body; | |
782 | |
783 if (name != NULL) { | |
784 uint len = env->GetStringUTFLength(name); | |
785 int unicode_len = env->GetStringLength(name); | |
786 if (len >= sizeof(buf)) { | |
787 utfName = NEW_C_HEAP_ARRAY(char, len + 1); | |
788 if (utfName == NULL) { | |
789 throw_new(env, "OutOfMemoryError"); | |
790 goto free_body; | |
791 } | |
792 } else { | |
793 utfName = buf; | |
794 } | |
795 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
796 //VerifyFixClassname(utfName); | |
797 for (uint i = 0; i < len; i++) { | |
798 if (utfName[i] == '.') utfName[i] = '/'; | |
799 } | |
800 } else { | |
801 utfName = NULL; | |
802 } | |
803 | |
804 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
805 | |
806 if (utfName && utfName != buf) | |
807 FREE_C_HEAP_ARRAY(char, utfName); | |
808 | |
809 free_body: | |
810 FREE_C_HEAP_ARRAY(jbyte, body); | |
811 return result; | |
812 } | |
813 } | |
814 | |
815 | |
816 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) | |
817 UnsafeWrapper("Unsafe_DefineClass"); | |
818 { | |
819 ThreadToNativeFromVM ttnfv(thread); | |
820 | |
821 int depthFromDefineClass0 = 1; | |
822 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
823 jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller); | |
824 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); | |
825 | |
826 return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); | |
827 } | |
828 UNSAFE_END | |
829 | |
830 | |
831 UNSAFE_ENTRY(jclass, Unsafe_DefineClass1(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd)) | |
832 UnsafeWrapper("Unsafe_DefineClass"); | |
833 { | |
834 ThreadToNativeFromVM ttnfv(thread); | |
835 | |
836 return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); | |
837 } | |
838 UNSAFE_END | |
839 | |
840 | |
841 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
842 UnsafeWrapper("Unsafe_MonitorEnter"); | |
843 { | |
844 if (jobj == NULL) { | |
845 THROW(vmSymbols::java_lang_NullPointerException()); | |
846 } | |
847 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
848 ObjectSynchronizer::jni_enter(obj, CHECK); | |
849 } | |
850 UNSAFE_END | |
851 | |
852 | |
853 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
854 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
855 { | |
856 if (jobj == NULL) { | |
857 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
858 } | |
859 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
860 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
861 return (res ? JNI_TRUE : JNI_FALSE); | |
862 } | |
863 UNSAFE_END | |
864 | |
865 | |
866 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
867 UnsafeWrapper("Unsafe_MonitorExit"); | |
868 { | |
869 if (jobj == NULL) { | |
870 THROW(vmSymbols::java_lang_NullPointerException()); | |
871 } | |
872 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
873 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
874 } | |
875 UNSAFE_END | |
876 | |
877 | |
878 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
879 UnsafeWrapper("Unsafe_ThrowException"); | |
880 { | |
881 ThreadToNativeFromVM ttnfv(thread); | |
882 env->Throw(thr); | |
883 } | |
884 UNSAFE_END | |
885 | |
886 // JSR166 ------------------------------------------------------------------ | |
887 | |
888 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
889 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
890 oop x = JNIHandles::resolve(x_h); | |
891 oop e = JNIHandles::resolve(e_h); | |
892 oop p = JNIHandles::resolve(obj); | |
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893 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
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894 update_barrier_set_pre((void*)addr, e); |
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895 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e); |
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896 jboolean success = (res == e); |
0 | 897 if (success) |
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898 update_barrier_set((void*)addr, x); |
0 | 899 return success; |
900 UNSAFE_END | |
901 | |
902 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
903 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
904 oop p = JNIHandles::resolve(obj); | |
905 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
906 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
907 UNSAFE_END | |
908 | |
909 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
910 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
911 Handle p (THREAD, JNIHandles::resolve(obj)); | |
912 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
913 if (VM_Version::supports_cx8()) | |
914 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
915 else { | |
916 jboolean success = false; | |
917 ObjectLocker ol(p, THREAD); | |
918 if (*addr == e) { *addr = x; success = true; } | |
919 return success; | |
920 } | |
921 UNSAFE_END | |
922 | |
923 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
924 UnsafeWrapper("Unsafe_Park"); | |
925 JavaThreadParkedState jtps(thread, time != 0); | |
926 thread->parker()->park(isAbsolute != 0, time); | |
927 UNSAFE_END | |
928 | |
929 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
930 UnsafeWrapper("Unsafe_Unpark"); | |
931 Parker* p = NULL; | |
932 if (jthread != NULL) { | |
933 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
934 if (java_thread != NULL) { | |
935 jlong lp = java_lang_Thread::park_event(java_thread); | |
936 if (lp != 0) { | |
937 // This cast is OK even though the jlong might have been read | |
938 // non-atomically on 32bit systems, since there, one word will | |
939 // always be zero anyway and the value set is always the same | |
940 p = (Parker*)addr_from_java(lp); | |
941 } else { | |
942 // Grab lock if apparently null or using older version of library | |
943 MutexLocker mu(Threads_lock); | |
944 java_thread = JNIHandles::resolve_non_null(jthread); | |
945 if (java_thread != NULL) { | |
946 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
947 if (thr != NULL) { | |
948 p = thr->parker(); | |
949 if (p != NULL) { // Bind to Java thread for next time. | |
950 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
951 } | |
952 } | |
953 } | |
954 } | |
955 } | |
956 } | |
957 if (p != NULL) { | |
958 p->unpark(); | |
959 } | |
960 UNSAFE_END | |
961 | |
962 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
963 UnsafeWrapper("Unsafe_Loadavg"); | |
964 const int max_nelem = 3; | |
965 double la[max_nelem]; | |
966 jint ret; | |
967 | |
968 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
969 assert(a->is_typeArray(), "must be type array"); | |
970 | |
971 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
972 ThreadToNativeFromVM ttnfv(thread); | |
973 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
974 return -1; | |
975 } | |
976 | |
977 ret = os::loadavg(la, nelem); | |
978 if (ret == -1) return -1; | |
979 | |
980 // if successful, ret is the number of samples actually retrieved. | |
981 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
982 switch(ret) { | |
983 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
984 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
985 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
986 } | |
987 return ret; | |
988 UNSAFE_END | |
989 | |
990 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
991 UnsafeWrapper("Unsafe_PrefetchRead"); | |
992 oop p = JNIHandles::resolve(obj); | |
993 void* addr = index_oop_from_field_offset_long(p, 0); | |
994 Prefetch::read(addr, (intx)offset); | |
995 UNSAFE_END | |
996 | |
997 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
998 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
999 oop p = JNIHandles::resolve(obj); | |
1000 void* addr = index_oop_from_field_offset_long(p, 0); | |
1001 Prefetch::write(addr, (intx)offset); | |
1002 UNSAFE_END | |
1003 | |
1004 | |
1005 /// JVM_RegisterUnsafeMethods | |
1006 | |
1007 #define ADR "J" | |
1008 | |
1009 #define LANG "Ljava/lang/" | |
1010 | |
1011 #define OBJ LANG"Object;" | |
1012 #define CLS LANG"Class;" | |
1013 #define CTR LANG"reflect/Constructor;" | |
1014 #define FLD LANG"reflect/Field;" | |
1015 #define MTH LANG"reflect/Method;" | |
1016 #define THR LANG"Throwable;" | |
1017 | |
1018 #define DC0_Args LANG"String;[BII" | |
1019 #define DC1_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" | |
1020 | |
1021 #define CC (char*) /*cast a literal from (const char*)*/ | |
1022 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
1023 | |
1024 // define deprecated accessors for compabitility with 1.4.0 | |
1025 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
1026 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
1027 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
1028 | |
1029 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
1030 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
1031 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1032 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
1033 | |
1034 // Note: In 1.5.0, there are volatile versions too | |
1035 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
1036 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1037 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
1038 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
1039 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
1040 | |
1041 | |
1042 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
1043 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
1044 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
1045 | |
1046 | |
1047 | |
1048 // %%% These are temporarily supported until the SDK sources | |
1049 // contain the necessarily updated Unsafe.java. | |
1050 static JNINativeMethod methods_140[] = { | |
1051 | |
1052 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
1053 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
1054 | |
1055 DECLARE_GETSETOOP_140(Boolean, Z), | |
1056 DECLARE_GETSETOOP_140(Byte, B), | |
1057 DECLARE_GETSETOOP_140(Short, S), | |
1058 DECLARE_GETSETOOP_140(Char, C), | |
1059 DECLARE_GETSETOOP_140(Int, I), | |
1060 DECLARE_GETSETOOP_140(Long, J), | |
1061 DECLARE_GETSETOOP_140(Float, F), | |
1062 DECLARE_GETSETOOP_140(Double, D), | |
1063 | |
1064 DECLARE_GETSETNATIVE(Byte, B), | |
1065 DECLARE_GETSETNATIVE(Short, S), | |
1066 DECLARE_GETSETNATIVE(Char, C), | |
1067 DECLARE_GETSETNATIVE(Int, I), | |
1068 DECLARE_GETSETNATIVE(Long, J), | |
1069 DECLARE_GETSETNATIVE(Float, F), | |
1070 DECLARE_GETSETNATIVE(Double, D), | |
1071 | |
1072 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1073 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1074 | |
1075 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1076 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1077 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1078 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1079 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1080 | |
1081 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, //deprecated | |
1082 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, //deprecated | |
1083 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1084 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1085 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1086 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1087 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1088 | |
1089 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1090 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1091 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1092 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1093 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1094 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1095 }; | |
1096 | |
1097 // These are the old methods prior to the JSR 166 changes in 1.5.0 | |
1098 static JNINativeMethod methods_141[] = { | |
1099 | |
1100 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1101 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1102 | |
1103 DECLARE_GETSETOOP_141(Boolean, Z), | |
1104 DECLARE_GETSETOOP_141(Byte, B), | |
1105 DECLARE_GETSETOOP_141(Short, S), | |
1106 DECLARE_GETSETOOP_141(Char, C), | |
1107 DECLARE_GETSETOOP_141(Int, I), | |
1108 DECLARE_GETSETOOP_141(Long, J), | |
1109 DECLARE_GETSETOOP_141(Float, F), | |
1110 DECLARE_GETSETOOP_141(Double, D), | |
1111 | |
1112 DECLARE_GETSETNATIVE(Byte, B), | |
1113 DECLARE_GETSETNATIVE(Short, S), | |
1114 DECLARE_GETSETNATIVE(Char, C), | |
1115 DECLARE_GETSETNATIVE(Int, I), | |
1116 DECLARE_GETSETNATIVE(Long, J), | |
1117 DECLARE_GETSETNATIVE(Float, F), | |
1118 DECLARE_GETSETNATIVE(Double, D), | |
1119 | |
1120 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1121 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1122 | |
1123 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1124 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1125 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1126 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1127 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1128 | |
1129 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1130 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1131 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1132 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1133 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1134 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1135 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1136 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1137 | |
1138 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1139 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1140 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1141 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1142 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1143 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1144 | |
1145 }; | |
1146 | |
1147 // These are the old methods prior to the JSR 166 changes in 1.6.0 | |
1148 static JNINativeMethod methods_15[] = { | |
1149 | |
1150 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1151 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1152 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1153 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1154 | |
1155 | |
1156 DECLARE_GETSETOOP(Boolean, Z), | |
1157 DECLARE_GETSETOOP(Byte, B), | |
1158 DECLARE_GETSETOOP(Short, S), | |
1159 DECLARE_GETSETOOP(Char, C), | |
1160 DECLARE_GETSETOOP(Int, I), | |
1161 DECLARE_GETSETOOP(Long, J), | |
1162 DECLARE_GETSETOOP(Float, F), | |
1163 DECLARE_GETSETOOP(Double, D), | |
1164 | |
1165 DECLARE_GETSETNATIVE(Byte, B), | |
1166 DECLARE_GETSETNATIVE(Short, S), | |
1167 DECLARE_GETSETNATIVE(Char, C), | |
1168 DECLARE_GETSETNATIVE(Int, I), | |
1169 DECLARE_GETSETNATIVE(Long, J), | |
1170 DECLARE_GETSETNATIVE(Float, F), | |
1171 DECLARE_GETSETNATIVE(Double, D), | |
1172 | |
1173 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1174 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1175 | |
1176 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1177 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1178 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1179 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1180 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1181 | |
1182 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1183 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1184 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1185 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1186 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1187 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1188 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1189 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1190 | |
1191 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1192 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1193 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1194 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1195 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1196 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1197 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1198 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1199 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1200 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1201 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1202 | |
1203 }; | |
1204 | |
1205 // These are the correct methods, moving forward: | |
1206 static JNINativeMethod methods[] = { | |
1207 | |
1208 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1209 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1210 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1211 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1212 | |
1213 | |
1214 DECLARE_GETSETOOP(Boolean, Z), | |
1215 DECLARE_GETSETOOP(Byte, B), | |
1216 DECLARE_GETSETOOP(Short, S), | |
1217 DECLARE_GETSETOOP(Char, C), | |
1218 DECLARE_GETSETOOP(Int, I), | |
1219 DECLARE_GETSETOOP(Long, J), | |
1220 DECLARE_GETSETOOP(Float, F), | |
1221 DECLARE_GETSETOOP(Double, D), | |
1222 | |
1223 DECLARE_GETSETNATIVE(Byte, B), | |
1224 DECLARE_GETSETNATIVE(Short, S), | |
1225 DECLARE_GETSETNATIVE(Char, C), | |
1226 DECLARE_GETSETNATIVE(Int, I), | |
1227 DECLARE_GETSETNATIVE(Long, J), | |
1228 DECLARE_GETSETNATIVE(Float, F), | |
1229 DECLARE_GETSETNATIVE(Double, D), | |
1230 | |
1231 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1232 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1233 | |
1234 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1235 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1236 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1237 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1238 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1239 | |
1240 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1241 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1242 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1243 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1244 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1245 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1246 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1247 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1248 | |
1249 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1250 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1251 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1252 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1253 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1254 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
1255 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1256 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1257 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1258 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1259 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
1260 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
1261 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
1262 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1263 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1264 | |
1265 // {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)}, | |
1266 | |
1267 // {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1268 // {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1269 // {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1270 // {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1271 | |
1272 }; | |
1273 | |
1274 JNINativeMethod loadavg_method[] = { | |
1275 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} | |
1276 }; | |
1277 | |
1278 JNINativeMethod prefetch_methods[] = { | |
1279 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1280 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
1281 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1282 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1283 }; | |
1284 | |
1285 JNINativeMethod memcopy_methods[] = { | |
1286 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, | |
1287 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
1288 }; | |
1289 | |
1290 JNINativeMethod memcopy_methods_15[] = { | |
1291 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1292 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
1293 }; | |
1294 | |
1295 | |
1296 #undef CC | |
1297 #undef FN_PTR | |
1298 | |
1299 #undef ADR | |
1300 #undef LANG | |
1301 #undef OBJ | |
1302 #undef CLS | |
1303 #undef CTR | |
1304 #undef FLD | |
1305 #undef MTH | |
1306 #undef THR | |
1307 #undef DC0_Args | |
1308 #undef DC1_Args | |
1309 | |
1310 #undef DECLARE_GETSETOOP | |
1311 #undef DECLARE_GETSETNATIVE | |
1312 | |
1313 | |
1314 // This one function is exported, used by NativeLookup. | |
1315 // The Unsafe_xxx functions above are called only from the interpreter. | |
1316 // The optimizer looks at names and signatures to recognize | |
1317 // individual functions. | |
1318 | |
1319 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
1320 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
1321 { | |
1322 ThreadToNativeFromVM ttnfv(thread); | |
1323 { | |
1324 env->RegisterNatives(unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); | |
1325 if (env->ExceptionOccurred()) { | |
1326 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1327 tty->print_cr("Warning: SDK 1.6 Unsafe.loadavg not found."); | |
1328 } | |
1329 env->ExceptionClear(); | |
1330 } | |
1331 } | |
1332 { | |
1333 env->RegisterNatives(unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); | |
1334 if (env->ExceptionOccurred()) { | |
1335 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1336 tty->print_cr("Warning: SDK 1.6 Unsafe.prefetchRead/Write not found."); | |
1337 } | |
1338 env->ExceptionClear(); | |
1339 } | |
1340 } | |
1341 { | |
1342 env->RegisterNatives(unsafecls, memcopy_methods, sizeof(memcopy_methods)/sizeof(JNINativeMethod)); | |
1343 if (env->ExceptionOccurred()) { | |
1344 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1345 tty->print_cr("Warning: SDK 1.7 Unsafe.copyMemory not found."); | |
1346 } | |
1347 env->ExceptionClear(); | |
1348 env->RegisterNatives(unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); | |
1349 if (env->ExceptionOccurred()) { | |
1350 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1351 tty->print_cr("Warning: SDK 1.5 Unsafe.copyMemory not found."); | |
1352 } | |
1353 env->ExceptionClear(); | |
1354 } | |
1355 } | |
1356 } | |
1357 int status = env->RegisterNatives(unsafecls, methods, sizeof(methods)/sizeof(JNINativeMethod)); | |
1358 if (env->ExceptionOccurred()) { | |
1359 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1360 tty->print_cr("Warning: SDK 1.6 version of Unsafe not found."); | |
1361 } | |
1362 env->ExceptionClear(); | |
1363 // %%% For now, be backward compatible with an older class: | |
1364 status = env->RegisterNatives(unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); | |
1365 } | |
1366 if (env->ExceptionOccurred()) { | |
1367 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1368 tty->print_cr("Warning: SDK 1.5 version of Unsafe not found."); | |
1369 } | |
1370 env->ExceptionClear(); | |
1371 // %%% For now, be backward compatible with an older class: | |
1372 status = env->RegisterNatives(unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); | |
1373 } | |
1374 if (env->ExceptionOccurred()) { | |
1375 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1376 tty->print_cr("Warning: SDK 1.4.1 version of Unsafe not found."); | |
1377 } | |
1378 env->ExceptionClear(); | |
1379 // %%% For now, be backward compatible with an older class: | |
1380 status = env->RegisterNatives(unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); | |
1381 } | |
1382 guarantee(status == 0, "register unsafe natives"); | |
1383 } | |
1384 JVM_END |