Mercurial > hg > graal-compiler
annotate src/share/vm/prims/unsafe.cpp @ 1711:a6bff45449bc
6973570: OrderAccess::storestore() scales poorly on multi-socket x64 and sparc: cache-line ping-ponging
Summary: volatile store to static variable removed in favour of a volatile store to stack to avoid excessive cache coherency traffic; verified that the volatile store is not elided by any of our current compilers.
Reviewed-by: dholmes, dice, jcoomes, kvn
author | ysr |
---|---|
date | Tue, 10 Aug 2010 14:53:35 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2008, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 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 | |
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32 HS_DTRACE_PROBE_DECL3(hotspot, thread__park__begin, uintptr_t, int, long long); |
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33 HS_DTRACE_PROBE_DECL1(hotspot, thread__park__end, uintptr_t); |
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34 HS_DTRACE_PROBE_DECL1(hotspot, thread__unpark, uintptr_t); |
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35 |
0 | 36 #define MAX_OBJECT_SIZE \ |
37 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ | |
38 + ((julong)max_jint * sizeof(double)) ) | |
39 | |
40 | |
41 #define UNSAFE_ENTRY(result_type, header) \ | |
42 JVM_ENTRY(result_type, header) | |
43 | |
44 // Can't use UNSAFE_LEAF because it has the signature of a straight | |
45 // call into the runtime (just like JVM_LEAF, funny that) but it's | |
46 // called like a Java Native and thus the wrapper built for it passes | |
47 // arguments like a JNI call. It expects those arguments to be popped | |
48 // from the stack on Intel like all good JNI args are, and adjusts the | |
49 // stack according. Since the JVM_LEAF call expects no extra | |
50 // arguments the stack isn't popped in the C code, is pushed by the | |
51 // wrapper and we get sick. | |
52 //#define UNSAFE_LEAF(result_type, header) \ | |
53 // JVM_LEAF(result_type, header) | |
54 | |
55 #define UNSAFE_END JVM_END | |
56 | |
57 #define UnsafeWrapper(arg) /*nothing, for the present*/ | |
58 | |
59 | |
60 inline void* addr_from_java(jlong addr) { | |
61 // This assert fails in a variety of ways on 32-bit systems. | |
62 // It is impossible to predict whether native code that converts | |
63 // pointers to longs will sign-extend or zero-extend the addresses. | |
64 //assert(addr == (uintptr_t)addr, "must not be odd high bits"); | |
65 return (void*)(uintptr_t)addr; | |
66 } | |
67 | |
68 inline jlong addr_to_java(void* p) { | |
69 assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); | |
70 return (uintptr_t)p; | |
71 } | |
72 | |
73 | |
74 // Note: The VM's obj_field and related accessors use byte-scaled | |
75 // ("unscaled") offsets, just as the unsafe methods do. | |
76 | |
77 // However, the method Unsafe.fieldOffset explicitly declines to | |
78 // guarantee this. The field offset values manipulated by the Java user | |
79 // through the Unsafe API are opaque cookies that just happen to be byte | |
80 // offsets. We represent this state of affairs by passing the cookies | |
81 // through conversion functions when going between the VM and the Unsafe API. | |
82 // The conversion functions just happen to be no-ops at present. | |
83 | |
84 inline jlong field_offset_to_byte_offset(jlong field_offset) { | |
85 return field_offset; | |
86 } | |
87 | |
88 inline jlong field_offset_from_byte_offset(jlong byte_offset) { | |
89 return byte_offset; | |
90 } | |
91 | |
92 inline jint invocation_key_from_method_slot(jint slot) { | |
93 return slot; | |
94 } | |
95 | |
96 inline jint invocation_key_to_method_slot(jint key) { | |
97 return key; | |
98 } | |
99 | |
100 inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { | |
101 jlong byte_offset = field_offset_to_byte_offset(field_offset); | |
102 #ifdef ASSERT | |
103 if (p != NULL) { | |
104 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
105 if (byte_offset == (jint)byte_offset) { | |
106 void* ptr_plus_disp = (address)p + byte_offset; | |
113
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107 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
0 | 108 "raw [ptr+disp] must be consistent with oop::field_base"); |
109 } | |
110 } | |
111 #endif | |
112 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
113 return (address)p + (jint) byte_offset; | |
114 else | |
115 return (address)p + byte_offset; | |
116 } | |
117 | |
118 // Externally callable versions: | |
119 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
120 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
121 return field_offset; | |
122 } | |
123 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
124 return byte_offset; | |
125 } | |
126 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
127 return invocation_key_from_method_slot(slot); | |
128 } | |
129 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
130 return invocation_key_to_method_slot(key); | |
131 } | |
132 | |
133 | |
134 ///// Data in the Java heap. | |
135 | |
136 #define GET_FIELD(obj, offset, type_name, v) \ | |
137 oop p = JNIHandles::resolve(obj); \ | |
138 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
139 | |
140 #define SET_FIELD(obj, offset, type_name, x) \ | |
141 oop p = JNIHandles::resolve(obj); \ | |
142 *(type_name*)index_oop_from_field_offset_long(p, offset) = x | |
143 | |
144 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
145 oop p = JNIHandles::resolve(obj); \ | |
146 volatile type_name v = *(volatile type_name*)index_oop_from_field_offset_long(p, offset) | |
147 | |
148 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
149 oop p = JNIHandles::resolve(obj); \ | |
150 *(volatile type_name*)index_oop_from_field_offset_long(p, offset) = x; \ | |
151 OrderAccess::fence(); | |
152 | |
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153 // Macros for oops that check UseCompressedOops |
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154 |
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155 #define GET_OOP_FIELD(obj, offset, v) \ |
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156 oop p = JNIHandles::resolve(obj); \ |
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157 oop v; \ |
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158 if (UseCompressedOops) { \ |
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159 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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160 v = oopDesc::decode_heap_oop(n); \ |
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161 } else { \ |
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162 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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163 } |
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164 |
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165 #define GET_OOP_FIELD_VOLATILE(obj, offset, v) \ |
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166 oop p = JNIHandles::resolve(obj); \ |
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167 volatile oop v; \ |
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168 if (UseCompressedOops) { \ |
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169 volatile narrowOop n = *(volatile narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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170 v = oopDesc::decode_heap_oop(n); \ |
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171 } else { \ |
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172 v = *(volatile oop*)index_oop_from_field_offset_long(p, offset); \ |
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173 } |
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174 |
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175 |
0 | 176 // Get/SetObject must be special-cased, since it works with handles. |
177 | |
178 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
179 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
180 UnsafeWrapper("Unsafe_GetObject"); | |
181 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
113
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182 GET_OOP_FIELD(obj, offset, v) |
0 | 183 return JNIHandles::make_local(env, v); |
184 UNSAFE_END | |
185 | |
186 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
187 UnsafeWrapper("Unsafe_SetObject"); | |
188 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
189 oop x = JNIHandles::resolve(x_h); | |
190 //SET_FIELD(obj, offset, oop, x); | |
191 oop p = JNIHandles::resolve(obj); | |
113
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192 if (UseCompressedOops) { |
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193 if (x != NULL) { |
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194 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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195 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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196 } else { |
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197 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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198 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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199 } |
0 | 200 } else { |
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201 if (x != NULL) { |
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202 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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203 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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204 } else { |
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205 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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206 } |
0 | 207 } |
208 UNSAFE_END | |
209 | |
210 // The normal variants allow a null base pointer with an arbitrary address. | |
211 // But if the base pointer is non-null, the offset should make some sense. | |
212 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
213 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
214 UnsafeWrapper("Unsafe_GetObject"); | |
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215 GET_OOP_FIELD(obj, offset, v) |
0 | 216 return JNIHandles::make_local(env, v); |
217 UNSAFE_END | |
218 | |
219 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
220 UnsafeWrapper("Unsafe_SetObject"); | |
221 oop x = JNIHandles::resolve(x_h); | |
222 oop p = JNIHandles::resolve(obj); | |
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223 if (UseCompressedOops) { |
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224 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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225 } else { |
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226 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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227 } |
0 | 228 UNSAFE_END |
229 | |
230 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
231 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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232 GET_OOP_FIELD_VOLATILE(obj, offset, v) |
0 | 233 return JNIHandles::make_local(env, v); |
234 UNSAFE_END | |
235 | |
236 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
237 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
238 oop x = JNIHandles::resolve(x_h); | |
239 oop p = JNIHandles::resolve(obj); | |
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240 if (UseCompressedOops) { |
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241 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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242 } else { |
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243 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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244 } |
0 | 245 OrderAccess::fence(); |
246 UNSAFE_END | |
247 | |
248 // Volatile long versions must use locks if !VM_Version::supports_cx8(). | |
249 // support_cx8 is a surrogate for 'supports atomic long memory ops'. | |
250 | |
251 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
252 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
253 { | |
254 if (VM_Version::supports_cx8()) { | |
255 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
256 return v; | |
257 } | |
258 else { | |
259 Handle p (THREAD, JNIHandles::resolve(obj)); | |
260 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
261 ObjectLocker ol(p, THREAD); | |
262 jlong value = *addr; | |
263 return value; | |
264 } | |
265 } | |
266 UNSAFE_END | |
267 | |
268 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
269 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
270 { | |
271 if (VM_Version::supports_cx8()) { | |
272 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
273 } | |
274 else { | |
275 Handle p (THREAD, JNIHandles::resolve(obj)); | |
276 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
277 ObjectLocker ol(p, THREAD); | |
278 *addr = x; | |
279 } | |
280 } | |
281 UNSAFE_END | |
282 | |
283 | |
284 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
285 \ | |
286 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
287 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
288 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
289 GET_FIELD(obj, offset, jboolean, v); \ | |
290 return v; \ | |
291 UNSAFE_END \ | |
292 \ | |
293 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
294 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
295 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
296 SET_FIELD(obj, offset, jboolean, x); \ | |
297 UNSAFE_END \ | |
298 \ | |
299 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
300 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
301 GET_FIELD(obj, offset, jboolean, v); \ | |
302 return v; \ | |
303 UNSAFE_END \ | |
304 \ | |
305 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
306 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
307 SET_FIELD(obj, offset, jboolean, x); \ | |
308 UNSAFE_END \ | |
309 \ | |
310 // END DEFINE_GETSETOOP. | |
311 | |
312 | |
313 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
314 \ | |
315 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
316 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
317 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
318 return v; \ | |
319 UNSAFE_END \ | |
320 \ | |
321 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
322 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
323 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
324 UNSAFE_END \ | |
325 \ | |
326 // END DEFINE_GETSETOOP_VOLATILE. | |
327 | |
328 DEFINE_GETSETOOP(jboolean, Boolean) | |
329 DEFINE_GETSETOOP(jbyte, Byte) | |
330 DEFINE_GETSETOOP(jshort, Short); | |
331 DEFINE_GETSETOOP(jchar, Char); | |
332 DEFINE_GETSETOOP(jint, Int); | |
333 DEFINE_GETSETOOP(jlong, Long); | |
334 DEFINE_GETSETOOP(jfloat, Float); | |
335 DEFINE_GETSETOOP(jdouble, Double); | |
336 | |
337 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
338 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
339 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
340 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
341 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
342 // no long -- handled specially | |
343 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
344 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
345 | |
346 #undef DEFINE_GETSETOOP | |
347 | |
348 // The non-intrinsified versions of setOrdered just use setVolatile | |
349 | |
350 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) \ | |
351 UnsafeWrapper("Unsafe_SetOrderedInt"); \ | |
352 SET_FIELD_VOLATILE(obj, offset, jint, x); \ | |
353 UNSAFE_END | |
354 | |
355 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
356 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
357 oop x = JNIHandles::resolve(x_h); | |
358 oop p = JNIHandles::resolve(obj); | |
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359 if (UseCompressedOops) { |
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360 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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361 } else { |
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362 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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363 } |
0 | 364 OrderAccess::fence(); |
365 UNSAFE_END | |
366 | |
367 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
368 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
369 { | |
370 if (VM_Version::supports_cx8()) { | |
371 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
372 } | |
373 else { | |
374 Handle p (THREAD, JNIHandles::resolve(obj)); | |
375 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
376 ObjectLocker ol(p, THREAD); | |
377 *addr = x; | |
378 } | |
379 } | |
380 UNSAFE_END | |
381 | |
382 ////// Data in the C heap. | |
383 | |
384 // Note: These do not throw NullPointerException for bad pointers. | |
385 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
386 // | |
387 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
388 \ | |
389 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
390 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
391 void* p = addr_from_java(addr); \ | |
392 JavaThread* t = JavaThread::current(); \ | |
393 t->set_doing_unsafe_access(true); \ | |
394 java_type x = *(volatile native_type*)p; \ | |
395 t->set_doing_unsafe_access(false); \ | |
396 return x; \ | |
397 UNSAFE_END \ | |
398 \ | |
399 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
400 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
401 JavaThread* t = JavaThread::current(); \ | |
402 t->set_doing_unsafe_access(true); \ | |
403 void* p = addr_from_java(addr); \ | |
404 *(volatile native_type*)p = x; \ | |
405 t->set_doing_unsafe_access(false); \ | |
406 UNSAFE_END \ | |
407 \ | |
408 // END DEFINE_GETSETNATIVE. | |
409 | |
410 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
411 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
412 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
413 DEFINE_GETSETNATIVE(jint, Int, jint); | |
414 // no long -- handled specially | |
415 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
416 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
417 | |
418 #undef DEFINE_GETSETNATIVE | |
419 | |
420 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
421 UnsafeWrapper("Unsafe_GetNativeLong"); | |
422 JavaThread* t = JavaThread::current(); | |
423 // We do it this way to avoid problems with access to heap using 64 | |
424 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
425 // some CPUs (SPARC) it leads to SIGBUS. | |
426 t->set_doing_unsafe_access(true); | |
427 void* p = addr_from_java(addr); | |
428 jlong x; | |
429 if (((intptr_t)p & 7) == 0) { | |
430 // jlong is aligned, do a volatile access | |
431 x = *(volatile jlong*)p; | |
432 } else { | |
433 jlong_accessor acc; | |
434 acc.words[0] = ((volatile jint*)p)[0]; | |
435 acc.words[1] = ((volatile jint*)p)[1]; | |
436 x = acc.long_value; | |
437 } | |
438 t->set_doing_unsafe_access(false); | |
439 return x; | |
440 UNSAFE_END | |
441 | |
442 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
443 UnsafeWrapper("Unsafe_SetNativeLong"); | |
444 JavaThread* t = JavaThread::current(); | |
445 // see comment for Unsafe_GetNativeLong | |
446 t->set_doing_unsafe_access(true); | |
447 void* p = addr_from_java(addr); | |
448 if (((intptr_t)p & 7) == 0) { | |
449 // jlong is aligned, do a volatile access | |
450 *(volatile jlong*)p = x; | |
451 } else { | |
452 jlong_accessor acc; | |
453 acc.long_value = x; | |
454 ((volatile jint*)p)[0] = acc.words[0]; | |
455 ((volatile jint*)p)[1] = acc.words[1]; | |
456 } | |
457 t->set_doing_unsafe_access(false); | |
458 UNSAFE_END | |
459 | |
460 | |
461 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
462 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
463 void* p = addr_from_java(addr); | |
464 return addr_to_java(*(void**)p); | |
465 UNSAFE_END | |
466 | |
467 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
468 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
469 void* p = addr_from_java(addr); | |
470 *(void**)p = addr_from_java(x); | |
471 UNSAFE_END | |
472 | |
473 | |
474 ////// Allocation requests | |
475 | |
476 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
477 UnsafeWrapper("Unsafe_AllocateInstance"); | |
478 { | |
479 ThreadToNativeFromVM ttnfv(thread); | |
480 return env->AllocObject(cls); | |
481 } | |
482 UNSAFE_END | |
483 | |
484 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
485 UnsafeWrapper("Unsafe_AllocateMemory"); | |
486 size_t sz = (size_t)size; | |
487 if (sz != (julong)size || size < 0) { | |
488 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
489 } | |
490 if (sz == 0) { | |
491 return 0; | |
492 } | |
493 sz = round_to(sz, HeapWordSize); | |
494 void* x = os::malloc(sz); | |
495 if (x == NULL) { | |
496 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
497 } | |
498 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
499 return addr_to_java(x); | |
500 UNSAFE_END | |
501 | |
502 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
503 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
504 void* p = addr_from_java(addr); | |
505 size_t sz = (size_t)size; | |
506 if (sz != (julong)size || size < 0) { | |
507 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
508 } | |
509 if (sz == 0) { | |
510 os::free(p); | |
511 return 0; | |
512 } | |
513 sz = round_to(sz, HeapWordSize); | |
514 void* x = (p == NULL) ? os::malloc(sz) : os::realloc(p, sz); | |
515 if (x == NULL) { | |
516 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
517 } | |
518 return addr_to_java(x); | |
519 UNSAFE_END | |
520 | |
521 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
522 UnsafeWrapper("Unsafe_FreeMemory"); | |
523 void* p = addr_from_java(addr); | |
524 if (p == NULL) { | |
525 return; | |
526 } | |
527 os::free(p); | |
528 UNSAFE_END | |
529 | |
530 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
531 UnsafeWrapper("Unsafe_SetMemory"); | |
532 size_t sz = (size_t)size; | |
533 if (sz != (julong)size || size < 0) { | |
534 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
535 } | |
536 char* p = (char*) addr_from_java(addr); | |
537 Copy::fill_to_memory_atomic(p, sz, value); | |
538 UNSAFE_END | |
539 | |
540 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
541 UnsafeWrapper("Unsafe_SetMemory"); | |
542 size_t sz = (size_t)size; | |
543 if (sz != (julong)size || size < 0) { | |
544 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
545 } | |
546 oop base = JNIHandles::resolve(obj); | |
547 void* p = index_oop_from_field_offset_long(base, offset); | |
548 Copy::fill_to_memory_atomic(p, sz, value); | |
549 UNSAFE_END | |
550 | |
551 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
552 UnsafeWrapper("Unsafe_CopyMemory"); | |
553 if (size == 0) { | |
554 return; | |
555 } | |
556 size_t sz = (size_t)size; | |
557 if (sz != (julong)size || size < 0) { | |
558 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
559 } | |
560 void* src = addr_from_java(srcAddr); | |
561 void* dst = addr_from_java(dstAddr); | |
562 Copy::conjoint_memory_atomic(src, dst, sz); | |
563 UNSAFE_END | |
564 | |
565 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
566 UnsafeWrapper("Unsafe_CopyMemory"); | |
567 if (size == 0) { | |
568 return; | |
569 } | |
570 size_t sz = (size_t)size; | |
571 if (sz != (julong)size || size < 0) { | |
572 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
573 } | |
574 oop srcp = JNIHandles::resolve(srcObj); | |
575 oop dstp = JNIHandles::resolve(dstObj); | |
576 if (dstp != NULL && !dstp->is_typeArray()) { | |
577 // NYI: This works only for non-oop arrays at present. | |
578 // Generalizing it would be reasonable, but requires card marking. | |
579 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
580 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
581 } | |
582 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
583 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
584 Copy::conjoint_memory_atomic(src, dst, sz); | |
585 UNSAFE_END | |
586 | |
587 | |
588 ////// Random queries | |
589 | |
590 // See comment at file start about UNSAFE_LEAF | |
591 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
592 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
593 UnsafeWrapper("Unsafe_AddressSize"); | |
594 return sizeof(void*); | |
595 UNSAFE_END | |
596 | |
597 // See comment at file start about UNSAFE_LEAF | |
598 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
599 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
600 UnsafeWrapper("Unsafe_PageSize"); | |
601 return os::vm_page_size(); | |
602 UNSAFE_END | |
603 | |
604 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
605 if (field == NULL) { | |
606 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
607 } | |
608 | |
609 oop reflected = JNIHandles::resolve_non_null(field); | |
610 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
611 klassOop k = java_lang_Class::as_klassOop(mirror); | |
612 int slot = java_lang_reflect_Field::slot(reflected); | |
613 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
614 | |
615 if (must_be_static >= 0) { | |
616 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
617 if (must_be_static != really_is_static) { | |
618 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
619 } | |
620 } | |
621 | |
622 int offset = instanceKlass::cast(k)->offset_from_fields(slot); | |
623 return field_offset_from_byte_offset(offset); | |
624 } | |
625 | |
626 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
627 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
628 return find_field_offset(field, 0, THREAD); | |
629 UNSAFE_END | |
630 | |
631 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
632 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
633 return find_field_offset(field, 1, THREAD); | |
634 UNSAFE_END | |
635 | |
636 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
637 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
638 // Note: In this VM implementation, a field address is always a short | |
639 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
640 // range of the return type is never used. However, some implementations | |
641 // might put the static field inside an array shared by many classes, | |
642 // or even at a fixed address, in which case the address could be quite | |
643 // large. In that last case, this function would return NULL, since | |
644 // the address would operate alone, without any base pointer. | |
645 | |
646 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
647 | |
648 oop reflected = JNIHandles::resolve_non_null(field); | |
649 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
650 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
651 | |
652 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
653 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
654 } | |
655 | |
656 return JNIHandles::make_local(env, java_lang_Class::as_klassOop(mirror)); | |
657 UNSAFE_END | |
658 | |
659 //@deprecated | |
660 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
661 UnsafeWrapper("Unsafe_FieldOffset"); | |
662 // tries (but fails) to be polymorphic between static and non-static: | |
663 jlong offset = find_field_offset(field, -1, THREAD); | |
664 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
665 return (jint)offset; | |
666 UNSAFE_END | |
667 | |
668 //@deprecated | |
669 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
670 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
671 if (clazz == NULL) { | |
672 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
673 } | |
674 return JNIHandles::make_local(env, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
675 UNSAFE_END | |
676 | |
677 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) | |
678 UnsafeWrapper("Unsafe_EnsureClassInitialized"); | |
679 if (clazz == NULL) { | |
680 THROW(vmSymbols::java_lang_NullPointerException()); | |
681 } | |
682 oop mirror = JNIHandles::resolve_non_null(clazz); | |
683 instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(mirror)); | |
684 if (k != NULL) { | |
685 k->initialize(CHECK); | |
686 } | |
687 UNSAFE_END | |
688 | |
689 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
690 if (acls == NULL) { | |
691 THROW(vmSymbols::java_lang_NullPointerException()); | |
692 } | |
693 oop mirror = JNIHandles::resolve_non_null(acls); | |
694 klassOop k = java_lang_Class::as_klassOop(mirror); | |
695 if (k == NULL || !k->klass_part()->oop_is_array()) { | |
696 THROW(vmSymbols::java_lang_InvalidClassException()); | |
697 } else if (k->klass_part()->oop_is_objArray()) { | |
698 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); | |
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699 scale = heapOopSize; |
0 | 700 } else if (k->klass_part()->oop_is_typeArray()) { |
701 typeArrayKlass* tak = typeArrayKlass::cast(k); | |
702 base = tak->array_header_in_bytes(); | |
703 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
704 scale = (1 << tak->log2_element_size()); | |
705 } else { | |
706 ShouldNotReachHere(); | |
707 } | |
708 } | |
709 | |
710 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
711 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
712 int base, scale; | |
713 getBaseAndScale(base, scale, acls, CHECK_0); | |
714 return field_offset_from_byte_offset(base); | |
715 UNSAFE_END | |
716 | |
717 | |
718 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
719 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
720 int base, scale; | |
721 getBaseAndScale(base, scale, acls, CHECK_0); | |
722 // This VM packs both fields and array elements down to the byte. | |
723 // But watch out: If this changes, so that array references for | |
724 // a given primitive type (say, T_BOOLEAN) use different memory units | |
725 // than fields, this method MUST return zero for such arrays. | |
726 // For example, the VM used to store sub-word sized fields in full | |
727 // words in the object layout, so that accessors like getByte(Object,int) | |
728 // did not really do what one might expect for arrays. Therefore, | |
729 // this function used to report a zero scale factor, so that the user | |
730 // would know not to attempt to access sub-word array elements. | |
731 // // Code for unpacked fields: | |
732 // if (scale < wordSize) return 0; | |
733 | |
734 // The following allows for a pretty general fieldOffset cookie scheme, | |
735 // but requires it to be linear in byte offset. | |
736 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
737 UNSAFE_END | |
738 | |
739 | |
740 static inline void throw_new(JNIEnv *env, const char *ename) { | |
741 char buf[100]; | |
742 strcpy(buf, "java/lang/"); | |
743 strcat(buf, ename); | |
744 jclass cls = env->FindClass(buf); | |
745 char* msg = NULL; | |
746 env->ThrowNew(cls, msg); | |
747 } | |
748 | |
749 static jclass Unsafe_DefineClass(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { | |
750 { | |
751 // Code lifted from JDK 1.3 ClassLoader.c | |
752 | |
753 jbyte *body; | |
754 char *utfName; | |
755 jclass result = 0; | |
756 char buf[128]; | |
757 | |
758 if (UsePerfData) { | |
759 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
760 } | |
761 | |
762 if (data == NULL) { | |
763 throw_new(env, "NullPointerException"); | |
764 return 0; | |
765 } | |
766 | |
767 /* Work around 4153825. malloc crashes on Solaris when passed a | |
768 * negative size. | |
769 */ | |
770 if (length < 0) { | |
771 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
772 return 0; | |
773 } | |
774 | |
775 body = NEW_C_HEAP_ARRAY(jbyte, length); | |
776 | |
777 if (body == 0) { | |
778 throw_new(env, "OutOfMemoryError"); | |
779 return 0; | |
780 } | |
781 | |
782 env->GetByteArrayRegion(data, offset, length, body); | |
783 | |
784 if (env->ExceptionOccurred()) | |
785 goto free_body; | |
786 | |
787 if (name != NULL) { | |
788 uint len = env->GetStringUTFLength(name); | |
789 int unicode_len = env->GetStringLength(name); | |
790 if (len >= sizeof(buf)) { | |
791 utfName = NEW_C_HEAP_ARRAY(char, len + 1); | |
792 if (utfName == NULL) { | |
793 throw_new(env, "OutOfMemoryError"); | |
794 goto free_body; | |
795 } | |
796 } else { | |
797 utfName = buf; | |
798 } | |
799 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
800 //VerifyFixClassname(utfName); | |
801 for (uint i = 0; i < len; i++) { | |
802 if (utfName[i] == '.') utfName[i] = '/'; | |
803 } | |
804 } else { | |
805 utfName = NULL; | |
806 } | |
807 | |
808 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
809 | |
810 if (utfName && utfName != buf) | |
811 FREE_C_HEAP_ARRAY(char, utfName); | |
812 | |
813 free_body: | |
814 FREE_C_HEAP_ARRAY(jbyte, body); | |
815 return result; | |
816 } | |
817 } | |
818 | |
819 | |
820 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) | |
821 UnsafeWrapper("Unsafe_DefineClass"); | |
822 { | |
823 ThreadToNativeFromVM ttnfv(thread); | |
824 | |
825 int depthFromDefineClass0 = 1; | |
826 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
827 jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller); | |
828 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); | |
829 | |
830 return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); | |
831 } | |
832 UNSAFE_END | |
833 | |
834 | |
835 UNSAFE_ENTRY(jclass, Unsafe_DefineClass1(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd)) | |
836 UnsafeWrapper("Unsafe_DefineClass"); | |
837 { | |
838 ThreadToNativeFromVM ttnfv(thread); | |
839 | |
840 return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); | |
841 } | |
842 UNSAFE_END | |
843 | |
431
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844 #define DAC_Args CLS"[B["OBJ |
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845 // define a class but do not make it known to the class loader or system dictionary |
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846 // - host_class: supplies context for linkage, access control, protection domain, and class loader |
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847 // - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
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848 // - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
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849 |
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850 // When you load an anonymous class U, it works as if you changed its name just before loading, |
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851 // to a name that you will never use again. Since the name is lost, no other class can directly |
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852 // link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
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853 // through java.lang.Class methods like Class.newInstance. |
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854 |
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855 // Access checks for linkage sites within U continue to follow the same rules as for named classes. |
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856 // The package of an anonymous class is given by the package qualifier on the name under which it was loaded. |
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857 // An anonymous class also has special privileges to access any member of its host class. |
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858 // This is the main reason why this loading operation is unsafe. The purpose of this is to |
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859 // allow language implementations to simulate "open classes"; a host class in effect gets |
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860 // new code when an anonymous class is loaded alongside it. A less convenient but more |
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861 // standard way to do this is with reflection, which can also be set to ignore access |
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862 // restrictions. |
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863 |
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864 // Access into an anonymous class is possible only through reflection. Therefore, there |
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865 // are no special access rules for calling into an anonymous class. The relaxed access |
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866 // rule for the host class is applied in the opposite direction: A host class reflectively |
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867 // access one of its anonymous classes. |
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868 |
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869 // If you load the same bytecodes twice, you get two different classes. You can reload |
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870 // the same bytecodes with or without varying CP patches. |
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871 |
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872 // By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
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873 // The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
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874 // The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
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875 |
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876 // This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
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877 // an outer class (so that U2 is an anonymous inner class of anonymous U1). |
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878 // It is not possible for a named class, or an older anonymous class, to refer by |
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879 // name (via its CP) to a newer anonymous class. |
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880 |
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881 // CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
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882 // or type descriptors used in the loaded anonymous class. |
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883 |
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884 // Finally, CP patching may be used to introduce "live" objects into the constant pool, |
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885 // instead of "dead" strings. A compiled statement like println((Object)"hello") can |
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886 // be changed to println(greeting), where greeting is an arbitrary object created before |
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887 // the anonymous class is loaded. This is useful in dynamic languages, in which |
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888 // various kinds of metaobjects must be introduced as constants into bytecode. |
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889 // Note the cast (Object), which tells the verifier to expect an arbitrary object, |
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890 // not just a literal string. For such ldc instructions, the verifier uses the |
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891 // type Object instead of String, if the loaded constant is not in fact a String. |
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892 |
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893 static oop |
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894 Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
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895 jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
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896 HeapWord* *temp_alloc, |
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897 TRAPS) { |
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898 |
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899 if (UsePerfData) { |
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900 ClassLoader::unsafe_defineClassCallCounter()->inc(); |
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901 } |
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902 |
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903 if (data == NULL) { |
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904 THROW_0(vmSymbols::java_lang_NullPointerException()); |
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905 } |
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906 |
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907 jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
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908 jint word_length = (length + sizeof(HeapWord)-1) / sizeof(HeapWord); |
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909 HeapWord* body = NEW_C_HEAP_ARRAY(HeapWord, word_length); |
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910 if (body == NULL) { |
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911 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
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912 } |
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913 |
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914 // caller responsible to free it: |
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915 (*temp_alloc) = body; |
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916 |
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917 { |
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918 jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
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919 Copy::conjoint_words((HeapWord*) array_base, body, word_length); |
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920 } |
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921 |
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922 u1* class_bytes = (u1*) body; |
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923 int class_bytes_length = (int) length; |
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924 if (class_bytes_length < 0) class_bytes_length = 0; |
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925 if (class_bytes == NULL |
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926 || host_class == NULL |
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927 || length != class_bytes_length) |
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928 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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929 |
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930 objArrayHandle cp_patches_h; |
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931 if (cp_patches_jh != NULL) { |
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932 oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
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933 if (!p->is_objArray()) |
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934 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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935 cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
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936 } |
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937 |
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938 KlassHandle host_klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(host_class))); |
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939 const char* host_source = host_klass->external_name(); |
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940 Handle host_loader(THREAD, host_klass->class_loader()); |
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941 Handle host_domain(THREAD, host_klass->protection_domain()); |
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942 |
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943 GrowableArray<Handle>* cp_patches = NULL; |
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944 if (cp_patches_h.not_null()) { |
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945 int alen = cp_patches_h->length(); |
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946 for (int i = alen-1; i >= 0; i--) { |
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947 oop p = cp_patches_h->obj_at(i); |
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948 if (p != NULL) { |
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949 Handle patch(THREAD, p); |
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950 if (cp_patches == NULL) |
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951 cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
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952 cp_patches->at_put(i, patch); |
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953 } |
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954 } |
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955 } |
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956 |
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957 ClassFileStream st(class_bytes, class_bytes_length, (char*) host_source); |
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958 |
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959 instanceKlassHandle anon_klass; |
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960 { |
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|
961 symbolHandle no_class_name; |
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|
962 klassOop anonk = SystemDictionary::parse_stream(no_class_name, |
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963 host_loader, host_domain, |
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964 &st, host_klass, cp_patches, |
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965 CHECK_NULL); |
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966 if (anonk == NULL) return NULL; |
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967 anon_klass = instanceKlassHandle(THREAD, anonk); |
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968 } |
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969 |
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970 // let caller initialize it as needed... |
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971 |
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972 return anon_klass->java_mirror(); |
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973 } |
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974 |
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975 UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) |
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976 { |
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977 UnsafeWrapper("Unsafe_DefineAnonymousClass"); |
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978 ResourceMark rm(THREAD); |
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979 |
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980 HeapWord* temp_alloc = NULL; |
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981 |
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982 jobject res_jh = NULL; |
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983 |
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984 { oop res_oop = Unsafe_DefineAnonymousClass_impl(env, |
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985 host_class, data, cp_patches_jh, |
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986 &temp_alloc, THREAD); |
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987 if (res_oop != NULL) |
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988 res_jh = JNIHandles::make_local(env, res_oop); |
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989 } |
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990 |
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991 // try/finally clause: |
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992 if (temp_alloc != NULL) { |
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993 FREE_C_HEAP_ARRAY(HeapWord, temp_alloc); |
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994 } |
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995 |
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996 return (jclass) res_jh; |
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997 } |
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998 UNSAFE_END |
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999 |
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1000 |
0 | 1001 |
1002 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1003 UnsafeWrapper("Unsafe_MonitorEnter"); | |
1004 { | |
1005 if (jobj == NULL) { | |
1006 THROW(vmSymbols::java_lang_NullPointerException()); | |
1007 } | |
1008 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1009 ObjectSynchronizer::jni_enter(obj, CHECK); | |
1010 } | |
1011 UNSAFE_END | |
1012 | |
1013 | |
1014 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1015 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
1016 { | |
1017 if (jobj == NULL) { | |
1018 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
1019 } | |
1020 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1021 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
1022 return (res ? JNI_TRUE : JNI_FALSE); | |
1023 } | |
1024 UNSAFE_END | |
1025 | |
1026 | |
1027 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1028 UnsafeWrapper("Unsafe_MonitorExit"); | |
1029 { | |
1030 if (jobj == NULL) { | |
1031 THROW(vmSymbols::java_lang_NullPointerException()); | |
1032 } | |
1033 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
1034 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
1035 } | |
1036 UNSAFE_END | |
1037 | |
1038 | |
1039 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
1040 UnsafeWrapper("Unsafe_ThrowException"); | |
1041 { | |
1042 ThreadToNativeFromVM ttnfv(thread); | |
1043 env->Throw(thr); | |
1044 } | |
1045 UNSAFE_END | |
1046 | |
1047 // JSR166 ------------------------------------------------------------------ | |
1048 | |
1049 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
1050 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
1051 oop x = JNIHandles::resolve(x_h); | |
1052 oop e = JNIHandles::resolve(e_h); | |
1053 oop p = JNIHandles::resolve(obj); | |
113
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1054 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
845
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1055 if (UseCompressedOops) { |
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1056 update_barrier_set_pre((narrowOop*)addr, e); |
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1057 } else { |
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1058 update_barrier_set_pre((oop*)addr, e); |
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1059 } |
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1060 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e); |
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1061 jboolean success = (res == e); |
0 | 1062 if (success) |
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1063 update_barrier_set((void*)addr, x); |
0 | 1064 return success; |
1065 UNSAFE_END | |
1066 | |
1067 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
1068 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
1069 oop p = JNIHandles::resolve(obj); | |
1070 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
1071 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
1072 UNSAFE_END | |
1073 | |
1074 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
1075 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
1076 Handle p (THREAD, JNIHandles::resolve(obj)); | |
1077 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
1078 if (VM_Version::supports_cx8()) | |
1079 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
1080 else { | |
1081 jboolean success = false; | |
1082 ObjectLocker ol(p, THREAD); | |
1083 if (*addr == e) { *addr = x; success = true; } | |
1084 return success; | |
1085 } | |
1086 UNSAFE_END | |
1087 | |
1088 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
1089 UnsafeWrapper("Unsafe_Park"); | |
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1090 HS_DTRACE_PROBE3(hotspot, thread__park__begin, thread->parker(), (int) isAbsolute, time); |
0 | 1091 JavaThreadParkedState jtps(thread, time != 0); |
1092 thread->parker()->park(isAbsolute != 0, time); | |
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1093 HS_DTRACE_PROBE1(hotspot, thread__park__end, thread->parker()); |
0 | 1094 UNSAFE_END |
1095 | |
1096 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
1097 UnsafeWrapper("Unsafe_Unpark"); | |
1098 Parker* p = NULL; | |
1099 if (jthread != NULL) { | |
1100 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
1101 if (java_thread != NULL) { | |
1102 jlong lp = java_lang_Thread::park_event(java_thread); | |
1103 if (lp != 0) { | |
1104 // This cast is OK even though the jlong might have been read | |
1105 // non-atomically on 32bit systems, since there, one word will | |
1106 // always be zero anyway and the value set is always the same | |
1107 p = (Parker*)addr_from_java(lp); | |
1108 } else { | |
1109 // Grab lock if apparently null or using older version of library | |
1110 MutexLocker mu(Threads_lock); | |
1111 java_thread = JNIHandles::resolve_non_null(jthread); | |
1112 if (java_thread != NULL) { | |
1113 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
1114 if (thr != NULL) { | |
1115 p = thr->parker(); | |
1116 if (p != NULL) { // Bind to Java thread for next time. | |
1117 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
1118 } | |
1119 } | |
1120 } | |
1121 } | |
1122 } | |
1123 } | |
1124 if (p != NULL) { | |
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1125 HS_DTRACE_PROBE1(hotspot, thread__unpark, p); |
0 | 1126 p->unpark(); |
1127 } | |
1128 UNSAFE_END | |
1129 | |
1130 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
1131 UnsafeWrapper("Unsafe_Loadavg"); | |
1132 const int max_nelem = 3; | |
1133 double la[max_nelem]; | |
1134 jint ret; | |
1135 | |
1136 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
1137 assert(a->is_typeArray(), "must be type array"); | |
1138 | |
1139 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
1140 ThreadToNativeFromVM ttnfv(thread); | |
1141 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
1142 return -1; | |
1143 } | |
1144 | |
1145 ret = os::loadavg(la, nelem); | |
1146 if (ret == -1) return -1; | |
1147 | |
1148 // if successful, ret is the number of samples actually retrieved. | |
1149 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
1150 switch(ret) { | |
1151 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
1152 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
1153 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
1154 } | |
1155 return ret; | |
1156 UNSAFE_END | |
1157 | |
1158 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1159 UnsafeWrapper("Unsafe_PrefetchRead"); | |
1160 oop p = JNIHandles::resolve(obj); | |
1161 void* addr = index_oop_from_field_offset_long(p, 0); | |
1162 Prefetch::read(addr, (intx)offset); | |
1163 UNSAFE_END | |
1164 | |
1165 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1166 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
1167 oop p = JNIHandles::resolve(obj); | |
1168 void* addr = index_oop_from_field_offset_long(p, 0); | |
1169 Prefetch::write(addr, (intx)offset); | |
1170 UNSAFE_END | |
1171 | |
1172 | |
1173 /// JVM_RegisterUnsafeMethods | |
1174 | |
1175 #define ADR "J" | |
1176 | |
1177 #define LANG "Ljava/lang/" | |
1178 | |
1179 #define OBJ LANG"Object;" | |
1180 #define CLS LANG"Class;" | |
1181 #define CTR LANG"reflect/Constructor;" | |
1182 #define FLD LANG"reflect/Field;" | |
1183 #define MTH LANG"reflect/Method;" | |
1184 #define THR LANG"Throwable;" | |
1185 | |
1186 #define DC0_Args LANG"String;[BII" | |
1187 #define DC1_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" | |
1188 | |
1189 #define CC (char*) /*cast a literal from (const char*)*/ | |
1190 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
1191 | |
1192 // define deprecated accessors for compabitility with 1.4.0 | |
1193 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
1194 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
1195 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
1196 | |
1197 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
1198 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
1199 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1200 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
1201 | |
1202 // Note: In 1.5.0, there are volatile versions too | |
1203 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
1204 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1205 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
1206 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
1207 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
1208 | |
1209 | |
1210 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
1211 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
1212 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
1213 | |
1214 | |
1215 | |
1216 // %%% These are temporarily supported until the SDK sources | |
1217 // contain the necessarily updated Unsafe.java. | |
1218 static JNINativeMethod methods_140[] = { | |
1219 | |
1220 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
1221 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
1222 | |
1223 DECLARE_GETSETOOP_140(Boolean, Z), | |
1224 DECLARE_GETSETOOP_140(Byte, B), | |
1225 DECLARE_GETSETOOP_140(Short, S), | |
1226 DECLARE_GETSETOOP_140(Char, C), | |
1227 DECLARE_GETSETOOP_140(Int, I), | |
1228 DECLARE_GETSETOOP_140(Long, J), | |
1229 DECLARE_GETSETOOP_140(Float, F), | |
1230 DECLARE_GETSETOOP_140(Double, D), | |
1231 | |
1232 DECLARE_GETSETNATIVE(Byte, B), | |
1233 DECLARE_GETSETNATIVE(Short, S), | |
1234 DECLARE_GETSETNATIVE(Char, C), | |
1235 DECLARE_GETSETNATIVE(Int, I), | |
1236 DECLARE_GETSETNATIVE(Long, J), | |
1237 DECLARE_GETSETNATIVE(Float, F), | |
1238 DECLARE_GETSETNATIVE(Double, D), | |
1239 | |
1240 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1241 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1242 | |
1243 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1244 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1245 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1246 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1247 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1248 | |
1249 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, //deprecated | |
1250 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, //deprecated | |
1251 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1252 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1253 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1254 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1255 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1256 | |
1257 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1258 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1259 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1260 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1261 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1262 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1263 }; | |
1264 | |
1265 // These are the old methods prior to the JSR 166 changes in 1.5.0 | |
1266 static JNINativeMethod methods_141[] = { | |
1267 | |
1268 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1269 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1270 | |
1271 DECLARE_GETSETOOP_141(Boolean, Z), | |
1272 DECLARE_GETSETOOP_141(Byte, B), | |
1273 DECLARE_GETSETOOP_141(Short, S), | |
1274 DECLARE_GETSETOOP_141(Char, C), | |
1275 DECLARE_GETSETOOP_141(Int, I), | |
1276 DECLARE_GETSETOOP_141(Long, J), | |
1277 DECLARE_GETSETOOP_141(Float, F), | |
1278 DECLARE_GETSETOOP_141(Double, D), | |
1279 | |
1280 DECLARE_GETSETNATIVE(Byte, B), | |
1281 DECLARE_GETSETNATIVE(Short, S), | |
1282 DECLARE_GETSETNATIVE(Char, C), | |
1283 DECLARE_GETSETNATIVE(Int, I), | |
1284 DECLARE_GETSETNATIVE(Long, J), | |
1285 DECLARE_GETSETNATIVE(Float, F), | |
1286 DECLARE_GETSETNATIVE(Double, D), | |
1287 | |
1288 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1289 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1290 | |
1291 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1292 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1293 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1294 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1295 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1296 | |
1297 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1298 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1299 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1300 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1301 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1302 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1303 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1304 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1305 | |
1306 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1307 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1308 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1309 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1310 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1311 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1312 | |
1313 }; | |
1314 | |
1315 // These are the old methods prior to the JSR 166 changes in 1.6.0 | |
1316 static JNINativeMethod methods_15[] = { | |
1317 | |
1318 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1319 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1320 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1321 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1322 | |
1323 | |
1324 DECLARE_GETSETOOP(Boolean, Z), | |
1325 DECLARE_GETSETOOP(Byte, B), | |
1326 DECLARE_GETSETOOP(Short, S), | |
1327 DECLARE_GETSETOOP(Char, C), | |
1328 DECLARE_GETSETOOP(Int, I), | |
1329 DECLARE_GETSETOOP(Long, J), | |
1330 DECLARE_GETSETOOP(Float, F), | |
1331 DECLARE_GETSETOOP(Double, D), | |
1332 | |
1333 DECLARE_GETSETNATIVE(Byte, B), | |
1334 DECLARE_GETSETNATIVE(Short, S), | |
1335 DECLARE_GETSETNATIVE(Char, C), | |
1336 DECLARE_GETSETNATIVE(Int, I), | |
1337 DECLARE_GETSETNATIVE(Long, J), | |
1338 DECLARE_GETSETNATIVE(Float, F), | |
1339 DECLARE_GETSETNATIVE(Double, D), | |
1340 | |
1341 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1342 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1343 | |
1344 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1345 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1346 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1347 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1348 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1349 | |
1350 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1351 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1352 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1353 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1354 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1355 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1356 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1357 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1358 | |
1359 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1360 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1361 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1362 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1363 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1364 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1365 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1366 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1367 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1368 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1369 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1370 | |
1371 }; | |
1372 | |
1373 // These are the correct methods, moving forward: | |
1374 static JNINativeMethod methods[] = { | |
1375 | |
1376 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1377 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1378 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1379 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1380 | |
1381 | |
1382 DECLARE_GETSETOOP(Boolean, Z), | |
1383 DECLARE_GETSETOOP(Byte, B), | |
1384 DECLARE_GETSETOOP(Short, S), | |
1385 DECLARE_GETSETOOP(Char, C), | |
1386 DECLARE_GETSETOOP(Int, I), | |
1387 DECLARE_GETSETOOP(Long, J), | |
1388 DECLARE_GETSETOOP(Float, F), | |
1389 DECLARE_GETSETOOP(Double, D), | |
1390 | |
1391 DECLARE_GETSETNATIVE(Byte, B), | |
1392 DECLARE_GETSETNATIVE(Short, S), | |
1393 DECLARE_GETSETNATIVE(Char, C), | |
1394 DECLARE_GETSETNATIVE(Int, I), | |
1395 DECLARE_GETSETNATIVE(Long, J), | |
1396 DECLARE_GETSETNATIVE(Float, F), | |
1397 DECLARE_GETSETNATIVE(Double, D), | |
1398 | |
1399 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1400 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1401 | |
1402 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1403 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1404 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1405 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1406 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1407 | |
1408 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1409 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1410 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1411 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1412 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1413 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1414 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1415 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1416 | |
1417 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1418 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1419 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1420 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1421 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1422 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
1423 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1424 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1425 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1426 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1427 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
1428 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
1429 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
1430 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1431 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1432 | |
1433 // {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)}, | |
1434 | |
1435 // {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1436 // {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1437 // {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1438 // {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1439 | |
1440 }; | |
1441 | |
1442 JNINativeMethod loadavg_method[] = { | |
1443 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} | |
1444 }; | |
1445 | |
1446 JNINativeMethod prefetch_methods[] = { | |
1447 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1448 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
1449 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1450 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1451 }; | |
1452 | |
1453 JNINativeMethod memcopy_methods[] = { | |
1454 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, | |
1455 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
1456 }; | |
1457 | |
1458 JNINativeMethod memcopy_methods_15[] = { | |
1459 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1460 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
1461 }; | |
1462 | |
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1463 JNINativeMethod anonk_methods[] = { |
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1464 {CC"defineAnonymousClass", CC"("DAC_Args")"CLS, FN_PTR(Unsafe_DefineAnonymousClass)}, |
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1465 }; |
0 | 1466 |
1467 #undef CC | |
1468 #undef FN_PTR | |
1469 | |
1470 #undef ADR | |
1471 #undef LANG | |
1472 #undef OBJ | |
1473 #undef CLS | |
1474 #undef CTR | |
1475 #undef FLD | |
1476 #undef MTH | |
1477 #undef THR | |
1478 #undef DC0_Args | |
1479 #undef DC1_Args | |
1480 | |
1481 #undef DECLARE_GETSETOOP | |
1482 #undef DECLARE_GETSETNATIVE | |
1483 | |
1484 | |
1485 // This one function is exported, used by NativeLookup. | |
1486 // The Unsafe_xxx functions above are called only from the interpreter. | |
1487 // The optimizer looks at names and signatures to recognize | |
1488 // individual functions. | |
1489 | |
1490 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
1491 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
1492 { | |
1493 ThreadToNativeFromVM ttnfv(thread); | |
1494 { | |
1495 env->RegisterNatives(unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); | |
1496 if (env->ExceptionOccurred()) { | |
1497 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1498 tty->print_cr("Warning: SDK 1.6 Unsafe.loadavg not found."); | |
1499 } | |
1500 env->ExceptionClear(); | |
1501 } | |
1502 } | |
1503 { | |
1504 env->RegisterNatives(unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); | |
1505 if (env->ExceptionOccurred()) { | |
1506 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1507 tty->print_cr("Warning: SDK 1.6 Unsafe.prefetchRead/Write not found."); | |
1508 } | |
1509 env->ExceptionClear(); | |
1510 } | |
1511 } | |
1512 { | |
1513 env->RegisterNatives(unsafecls, memcopy_methods, sizeof(memcopy_methods)/sizeof(JNINativeMethod)); | |
1514 if (env->ExceptionOccurred()) { | |
1515 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1516 tty->print_cr("Warning: SDK 1.7 Unsafe.copyMemory not found."); | |
1517 } | |
1518 env->ExceptionClear(); | |
1519 env->RegisterNatives(unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); | |
1520 if (env->ExceptionOccurred()) { | |
1521 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1522 tty->print_cr("Warning: SDK 1.5 Unsafe.copyMemory not found."); | |
1523 } | |
1524 env->ExceptionClear(); | |
1525 } | |
1526 } | |
1527 } | |
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1528 if (AnonymousClasses) { |
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1529 env->RegisterNatives(unsafecls, anonk_methods, sizeof(anonk_methods)/sizeof(JNINativeMethod)); |
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1530 if (env->ExceptionOccurred()) { |
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1531 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1532 tty->print_cr("Warning: SDK 1.7 Unsafe.defineClass (anonymous version) not found."); |
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1533 } |
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1534 env->ExceptionClear(); |
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1535 } |
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1536 } |
0 | 1537 int status = env->RegisterNatives(unsafecls, methods, sizeof(methods)/sizeof(JNINativeMethod)); |
1538 if (env->ExceptionOccurred()) { | |
1539 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1540 tty->print_cr("Warning: SDK 1.6 version of Unsafe not found."); | |
1541 } | |
1542 env->ExceptionClear(); | |
1543 // %%% For now, be backward compatible with an older class: | |
1544 status = env->RegisterNatives(unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); | |
1545 } | |
1546 if (env->ExceptionOccurred()) { | |
1547 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1548 tty->print_cr("Warning: SDK 1.5 version of Unsafe not found."); | |
1549 } | |
1550 env->ExceptionClear(); | |
1551 // %%% For now, be backward compatible with an older class: | |
1552 status = env->RegisterNatives(unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); | |
1553 } | |
1554 if (env->ExceptionOccurred()) { | |
1555 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1556 tty->print_cr("Warning: SDK 1.4.1 version of Unsafe not found."); | |
1557 } | |
1558 env->ExceptionClear(); | |
1559 // %%% For now, be backward compatible with an older class: | |
1560 status = env->RegisterNatives(unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); | |
1561 } | |
1562 guarantee(status == 0, "register unsafe natives"); | |
1563 } | |
1564 JVM_END |