Mercurial > hg > truffle
annotate src/share/vm/prims/unsafe.cpp @ 14517:3812c088b945
Merge
author | lana |
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date | Thu, 06 Mar 2014 10:37:26 -0800 |
parents | 28f281e8de1d |
children | d8041d695d19 |
rev | line source |
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0 | 1 /* |
10405 | 2 * Copyright (c) 2000, 2013, 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 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/vmSymbols.hpp" | |
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27 #include "utilities/macros.hpp" |
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28 #if INCLUDE_ALL_GCS |
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29 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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30 #endif // INCLUDE_ALL_GCS |
1972 | 31 #include "memory/allocation.inline.hpp" |
32 #include "prims/jni.h" | |
33 #include "prims/jvm.h" | |
34 #include "runtime/globals.hpp" | |
35 #include "runtime/interfaceSupport.hpp" | |
36 #include "runtime/reflection.hpp" | |
37 #include "runtime/synchronizer.hpp" | |
38 #include "services/threadService.hpp" | |
10405 | 39 #include "trace/tracing.hpp" |
1972 | 40 #include "utilities/copy.hpp" |
41 #include "utilities/dtrace.hpp" | |
42 | |
0 | 43 /* |
44 * Implementation of class sun.misc.Unsafe | |
45 */ | |
46 | |
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47 |
0 | 48 #define MAX_OBJECT_SIZE \ |
49 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ | |
50 + ((julong)max_jint * sizeof(double)) ) | |
51 | |
52 | |
53 #define UNSAFE_ENTRY(result_type, header) \ | |
54 JVM_ENTRY(result_type, header) | |
55 | |
56 // Can't use UNSAFE_LEAF because it has the signature of a straight | |
57 // call into the runtime (just like JVM_LEAF, funny that) but it's | |
58 // called like a Java Native and thus the wrapper built for it passes | |
59 // arguments like a JNI call. It expects those arguments to be popped | |
60 // from the stack on Intel like all good JNI args are, and adjusts the | |
61 // stack according. Since the JVM_LEAF call expects no extra | |
62 // arguments the stack isn't popped in the C code, is pushed by the | |
63 // wrapper and we get sick. | |
64 //#define UNSAFE_LEAF(result_type, header) \ | |
65 // JVM_LEAF(result_type, header) | |
66 | |
67 #define UNSAFE_END JVM_END | |
68 | |
69 #define UnsafeWrapper(arg) /*nothing, for the present*/ | |
70 | |
71 | |
72 inline void* addr_from_java(jlong addr) { | |
73 // This assert fails in a variety of ways on 32-bit systems. | |
74 // It is impossible to predict whether native code that converts | |
75 // pointers to longs will sign-extend or zero-extend the addresses. | |
76 //assert(addr == (uintptr_t)addr, "must not be odd high bits"); | |
77 return (void*)(uintptr_t)addr; | |
78 } | |
79 | |
80 inline jlong addr_to_java(void* p) { | |
81 assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); | |
82 return (uintptr_t)p; | |
83 } | |
84 | |
85 | |
86 // Note: The VM's obj_field and related accessors use byte-scaled | |
87 // ("unscaled") offsets, just as the unsafe methods do. | |
88 | |
89 // However, the method Unsafe.fieldOffset explicitly declines to | |
90 // guarantee this. The field offset values manipulated by the Java user | |
91 // through the Unsafe API are opaque cookies that just happen to be byte | |
92 // offsets. We represent this state of affairs by passing the cookies | |
93 // through conversion functions when going between the VM and the Unsafe API. | |
94 // The conversion functions just happen to be no-ops at present. | |
95 | |
96 inline jlong field_offset_to_byte_offset(jlong field_offset) { | |
97 return field_offset; | |
98 } | |
99 | |
100 inline jlong field_offset_from_byte_offset(jlong byte_offset) { | |
101 return byte_offset; | |
102 } | |
103 | |
104 inline jint invocation_key_from_method_slot(jint slot) { | |
105 return slot; | |
106 } | |
107 | |
108 inline jint invocation_key_to_method_slot(jint key) { | |
109 return key; | |
110 } | |
111 | |
112 inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { | |
113 jlong byte_offset = field_offset_to_byte_offset(field_offset); | |
114 #ifdef ASSERT | |
115 if (p != NULL) { | |
116 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
117 if (byte_offset == (jint)byte_offset) { | |
118 void* ptr_plus_disp = (address)p + byte_offset; | |
113
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119 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
0 | 120 "raw [ptr+disp] must be consistent with oop::field_base"); |
121 } | |
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122 jlong p_size = HeapWordSize * (jlong)(p->size()); |
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123 assert(byte_offset < p_size, err_msg("Unsafe access: offset " INT64_FORMAT " > object's size " INT64_FORMAT, byte_offset, p_size)); |
0 | 124 } |
125 #endif | |
126 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
127 return (address)p + (jint) byte_offset; | |
128 else | |
129 return (address)p + byte_offset; | |
130 } | |
131 | |
132 // Externally callable versions: | |
133 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
134 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
135 return field_offset; | |
136 } | |
137 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
138 return byte_offset; | |
139 } | |
140 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
141 return invocation_key_from_method_slot(slot); | |
142 } | |
143 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
144 return invocation_key_to_method_slot(key); | |
145 } | |
146 | |
147 | |
148 ///// Data in the Java heap. | |
149 | |
150 #define GET_FIELD(obj, offset, type_name, v) \ | |
151 oop p = JNIHandles::resolve(obj); \ | |
152 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
153 | |
154 #define SET_FIELD(obj, offset, type_name, x) \ | |
155 oop p = JNIHandles::resolve(obj); \ | |
156 *(type_name*)index_oop_from_field_offset_long(p, offset) = x | |
157 | |
158 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
159 oop p = JNIHandles::resolve(obj); \ | |
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160 if (support_IRIW_for_not_multiple_copy_atomic_cpu) { \ |
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161 OrderAccess::fence(); \ |
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162 } \ |
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163 volatile type_name v = OrderAccess::load_acquire((volatile type_name*)index_oop_from_field_offset_long(p, offset)); |
0 | 164 |
165 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
166 oop p = JNIHandles::resolve(obj); \ | |
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167 OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), x); |
0 | 168 |
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169 // Macros for oops that check UseCompressedOops |
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170 |
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171 #define GET_OOP_FIELD(obj, offset, v) \ |
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172 oop p = JNIHandles::resolve(obj); \ |
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173 oop v; \ |
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174 if (UseCompressedOops) { \ |
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175 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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176 v = oopDesc::decode_heap_oop(n); \ |
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177 } else { \ |
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178 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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179 } |
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180 |
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181 |
0 | 182 // Get/SetObject must be special-cased, since it works with handles. |
183 | |
184 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
185 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
186 UnsafeWrapper("Unsafe_GetObject"); | |
187 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
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188 GET_OOP_FIELD(obj, offset, v) |
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189 jobject ret = JNIHandles::make_local(env, v); |
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190 #if INCLUDE_ALL_GCS |
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191 // We could be accessing the referent field in a reference |
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192 // object. If G1 is enabled then we need to register a non-null |
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193 // referent with the SATB barrier. |
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194 if (UseG1GC) { |
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195 bool needs_barrier = false; |
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196 |
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197 if (ret != NULL) { |
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198 if (offset == java_lang_ref_Reference::referent_offset) { |
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199 oop o = JNIHandles::resolve_non_null(obj); |
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200 Klass* k = o->klass(); |
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201 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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202 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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203 needs_barrier = true; |
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204 } |
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205 } |
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206 } |
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207 |
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208 if (needs_barrier) { |
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209 oop referent = JNIHandles::resolve(ret); |
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210 G1SATBCardTableModRefBS::enqueue(referent); |
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211 } |
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212 } |
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213 #endif // INCLUDE_ALL_GCS |
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214 return ret; |
0 | 215 UNSAFE_END |
216 | |
217 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
218 UnsafeWrapper("Unsafe_SetObject"); | |
219 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
220 oop x = JNIHandles::resolve(x_h); | |
221 //SET_FIELD(obj, offset, oop, x); | |
222 oop p = JNIHandles::resolve(obj); | |
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223 if (UseCompressedOops) { |
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224 if (x != NULL) { |
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225 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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226 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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227 } else { |
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228 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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229 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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230 } |
0 | 231 } else { |
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232 if (x != NULL) { |
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233 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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234 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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235 } else { |
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236 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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237 } |
0 | 238 } |
239 UNSAFE_END | |
240 | |
241 // The normal variants allow a null base pointer with an arbitrary address. | |
242 // But if the base pointer is non-null, the offset should make some sense. | |
243 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
244 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
245 UnsafeWrapper("Unsafe_GetObject"); | |
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246 GET_OOP_FIELD(obj, offset, v) |
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247 jobject ret = JNIHandles::make_local(env, v); |
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248 #if INCLUDE_ALL_GCS |
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249 // We could be accessing the referent field in a reference |
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250 // object. If G1 is enabled then we need to register non-null |
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251 // referent with the SATB barrier. |
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252 if (UseG1GC) { |
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253 bool needs_barrier = false; |
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254 |
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255 if (ret != NULL) { |
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256 if (offset == java_lang_ref_Reference::referent_offset && obj != NULL) { |
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257 oop o = JNIHandles::resolve(obj); |
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258 Klass* k = o->klass(); |
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259 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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260 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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261 needs_barrier = true; |
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262 } |
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263 } |
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264 } |
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265 |
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266 if (needs_barrier) { |
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267 oop referent = JNIHandles::resolve(ret); |
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268 G1SATBCardTableModRefBS::enqueue(referent); |
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269 } |
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270 } |
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271 #endif // INCLUDE_ALL_GCS |
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272 return ret; |
0 | 273 UNSAFE_END |
274 | |
275 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
276 UnsafeWrapper("Unsafe_SetObject"); | |
277 oop x = JNIHandles::resolve(x_h); | |
278 oop p = JNIHandles::resolve(obj); | |
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279 if (UseCompressedOops) { |
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280 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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281 } else { |
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282 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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283 } |
0 | 284 UNSAFE_END |
285 | |
286 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
287 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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288 oop p = JNIHandles::resolve(obj); |
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289 void* addr = index_oop_from_field_offset_long(p, offset); |
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290 volatile oop v; |
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291 if (UseCompressedOops) { |
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292 volatile narrowOop n = *(volatile narrowOop*) addr; |
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293 (void)const_cast<oop&>(v = oopDesc::decode_heap_oop(n)); |
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294 } else { |
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295 (void)const_cast<oop&>(v = *(volatile oop*) addr); |
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296 } |
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297 OrderAccess::acquire(); |
0 | 298 return JNIHandles::make_local(env, v); |
299 UNSAFE_END | |
300 | |
301 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
302 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
303 oop x = JNIHandles::resolve(x_h); | |
304 oop p = JNIHandles::resolve(obj); | |
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305 void* addr = index_oop_from_field_offset_long(p, offset); |
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306 OrderAccess::release(); |
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307 if (UseCompressedOops) { |
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308 oop_store((narrowOop*)addr, x); |
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309 } else { |
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310 oop_store((oop*)addr, x); |
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311 } |
0 | 312 OrderAccess::fence(); |
313 UNSAFE_END | |
314 | |
10235 | 315 #ifndef SUPPORTS_NATIVE_CX8 |
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316 // Keep old code for platforms which may not have atomic jlong (8 bytes) instructions |
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317 |
0 | 318 // Volatile long versions must use locks if !VM_Version::supports_cx8(). |
319 // support_cx8 is a surrogate for 'supports atomic long memory ops'. | |
320 | |
321 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
322 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
323 { | |
324 if (VM_Version::supports_cx8()) { | |
325 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
326 return v; | |
327 } | |
328 else { | |
329 Handle p (THREAD, JNIHandles::resolve(obj)); | |
330 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
331 ObjectLocker ol(p, THREAD); | |
332 jlong value = *addr; | |
333 return value; | |
334 } | |
335 } | |
336 UNSAFE_END | |
337 | |
338 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
339 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
340 { | |
341 if (VM_Version::supports_cx8()) { | |
342 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
343 } | |
344 else { | |
345 Handle p (THREAD, JNIHandles::resolve(obj)); | |
346 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
347 ObjectLocker ol(p, THREAD); | |
348 *addr = x; | |
349 } | |
350 } | |
351 UNSAFE_END | |
352 | |
10235 | 353 #endif // not SUPPORTS_NATIVE_CX8 |
0 | 354 |
355 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
356 \ | |
357 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
358 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
359 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
360 GET_FIELD(obj, offset, jboolean, v); \ | |
361 return v; \ | |
362 UNSAFE_END \ | |
363 \ | |
364 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
365 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
366 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
367 SET_FIELD(obj, offset, jboolean, x); \ | |
368 UNSAFE_END \ | |
369 \ | |
370 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
371 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
372 GET_FIELD(obj, offset, jboolean, v); \ | |
373 return v; \ | |
374 UNSAFE_END \ | |
375 \ | |
376 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
377 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
378 SET_FIELD(obj, offset, jboolean, x); \ | |
379 UNSAFE_END \ | |
380 \ | |
381 // END DEFINE_GETSETOOP. | |
382 | |
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383 DEFINE_GETSETOOP(jboolean, Boolean) |
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384 DEFINE_GETSETOOP(jbyte, Byte) |
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385 DEFINE_GETSETOOP(jshort, Short); |
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386 DEFINE_GETSETOOP(jchar, Char); |
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387 DEFINE_GETSETOOP(jint, Int); |
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388 DEFINE_GETSETOOP(jlong, Long); |
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389 DEFINE_GETSETOOP(jfloat, Float); |
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390 DEFINE_GETSETOOP(jdouble, Double); |
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391 |
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392 #undef DEFINE_GETSETOOP |
0 | 393 |
394 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
395 \ | |
396 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
397 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
398 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
399 return v; \ | |
400 UNSAFE_END \ | |
401 \ | |
402 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
403 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
404 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
405 UNSAFE_END \ | |
406 \ | |
407 // END DEFINE_GETSETOOP_VOLATILE. | |
408 | |
409 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
410 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
411 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
412 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
413 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
414 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
415 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
416 | |
10235 | 417 #ifdef SUPPORTS_NATIVE_CX8 |
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418 DEFINE_GETSETOOP_VOLATILE(jlong, Long); |
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419 #endif |
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420 |
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421 #undef DEFINE_GETSETOOP_VOLATILE |
0 | 422 |
423 // The non-intrinsified versions of setOrdered just use setVolatile | |
424 | |
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425 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) |
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426 UnsafeWrapper("Unsafe_SetOrderedInt"); |
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427 SET_FIELD_VOLATILE(obj, offset, jint, x); |
0 | 428 UNSAFE_END |
429 | |
430 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
431 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
432 oop x = JNIHandles::resolve(x_h); | |
433 oop p = JNIHandles::resolve(obj); | |
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434 void* addr = index_oop_from_field_offset_long(p, offset); |
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435 OrderAccess::release(); |
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436 if (UseCompressedOops) { |
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437 oop_store((narrowOop*)addr, x); |
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438 } else { |
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439 oop_store((oop*)addr, x); |
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440 } |
0 | 441 OrderAccess::fence(); |
442 UNSAFE_END | |
443 | |
444 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
445 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
10235 | 446 #ifdef SUPPORTS_NATIVE_CX8 |
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447 SET_FIELD_VOLATILE(obj, offset, jlong, x); |
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448 #else |
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449 // Keep old code for platforms which may not have atomic long (8 bytes) instructions |
0 | 450 { |
451 if (VM_Version::supports_cx8()) { | |
452 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
453 } | |
454 else { | |
455 Handle p (THREAD, JNIHandles::resolve(obj)); | |
456 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
457 ObjectLocker ol(p, THREAD); | |
458 *addr = x; | |
459 } | |
460 } | |
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461 #endif |
0 | 462 UNSAFE_END |
463 | |
7425 | 464 UNSAFE_ENTRY(void, Unsafe_LoadFence(JNIEnv *env, jobject unsafe)) |
465 UnsafeWrapper("Unsafe_LoadFence"); | |
466 OrderAccess::acquire(); | |
467 UNSAFE_END | |
468 | |
469 UNSAFE_ENTRY(void, Unsafe_StoreFence(JNIEnv *env, jobject unsafe)) | |
470 UnsafeWrapper("Unsafe_StoreFence"); | |
471 OrderAccess::release(); | |
472 UNSAFE_END | |
473 | |
474 UNSAFE_ENTRY(void, Unsafe_FullFence(JNIEnv *env, jobject unsafe)) | |
475 UnsafeWrapper("Unsafe_FullFence"); | |
476 OrderAccess::fence(); | |
477 UNSAFE_END | |
478 | |
0 | 479 ////// Data in the C heap. |
480 | |
481 // Note: These do not throw NullPointerException for bad pointers. | |
482 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
483 // | |
484 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
485 \ | |
486 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
487 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
488 void* p = addr_from_java(addr); \ | |
489 JavaThread* t = JavaThread::current(); \ | |
490 t->set_doing_unsafe_access(true); \ | |
491 java_type x = *(volatile native_type*)p; \ | |
492 t->set_doing_unsafe_access(false); \ | |
493 return x; \ | |
494 UNSAFE_END \ | |
495 \ | |
496 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
497 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
498 JavaThread* t = JavaThread::current(); \ | |
499 t->set_doing_unsafe_access(true); \ | |
500 void* p = addr_from_java(addr); \ | |
501 *(volatile native_type*)p = x; \ | |
502 t->set_doing_unsafe_access(false); \ | |
503 UNSAFE_END \ | |
504 \ | |
505 // END DEFINE_GETSETNATIVE. | |
506 | |
507 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
508 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
509 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
510 DEFINE_GETSETNATIVE(jint, Int, jint); | |
511 // no long -- handled specially | |
512 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
513 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
514 | |
515 #undef DEFINE_GETSETNATIVE | |
516 | |
517 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
518 UnsafeWrapper("Unsafe_GetNativeLong"); | |
519 JavaThread* t = JavaThread::current(); | |
520 // We do it this way to avoid problems with access to heap using 64 | |
521 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
522 // some CPUs (SPARC) it leads to SIGBUS. | |
523 t->set_doing_unsafe_access(true); | |
524 void* p = addr_from_java(addr); | |
525 jlong x; | |
526 if (((intptr_t)p & 7) == 0) { | |
527 // jlong is aligned, do a volatile access | |
528 x = *(volatile jlong*)p; | |
529 } else { | |
530 jlong_accessor acc; | |
531 acc.words[0] = ((volatile jint*)p)[0]; | |
532 acc.words[1] = ((volatile jint*)p)[1]; | |
533 x = acc.long_value; | |
534 } | |
535 t->set_doing_unsafe_access(false); | |
536 return x; | |
537 UNSAFE_END | |
538 | |
539 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
540 UnsafeWrapper("Unsafe_SetNativeLong"); | |
541 JavaThread* t = JavaThread::current(); | |
542 // see comment for Unsafe_GetNativeLong | |
543 t->set_doing_unsafe_access(true); | |
544 void* p = addr_from_java(addr); | |
545 if (((intptr_t)p & 7) == 0) { | |
546 // jlong is aligned, do a volatile access | |
547 *(volatile jlong*)p = x; | |
548 } else { | |
549 jlong_accessor acc; | |
550 acc.long_value = x; | |
551 ((volatile jint*)p)[0] = acc.words[0]; | |
552 ((volatile jint*)p)[1] = acc.words[1]; | |
553 } | |
554 t->set_doing_unsafe_access(false); | |
555 UNSAFE_END | |
556 | |
557 | |
558 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
559 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
560 void* p = addr_from_java(addr); | |
561 return addr_to_java(*(void**)p); | |
562 UNSAFE_END | |
563 | |
564 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
565 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
566 void* p = addr_from_java(addr); | |
567 *(void**)p = addr_from_java(x); | |
568 UNSAFE_END | |
569 | |
570 | |
571 ////// Allocation requests | |
572 | |
573 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
574 UnsafeWrapper("Unsafe_AllocateInstance"); | |
575 { | |
576 ThreadToNativeFromVM ttnfv(thread); | |
577 return env->AllocObject(cls); | |
578 } | |
579 UNSAFE_END | |
580 | |
581 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
582 UnsafeWrapper("Unsafe_AllocateMemory"); | |
583 size_t sz = (size_t)size; | |
584 if (sz != (julong)size || size < 0) { | |
585 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
586 } | |
587 if (sz == 0) { | |
588 return 0; | |
589 } | |
590 sz = round_to(sz, HeapWordSize); | |
6197 | 591 void* x = os::malloc(sz, mtInternal); |
0 | 592 if (x == NULL) { |
593 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
594 } | |
595 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
596 return addr_to_java(x); | |
597 UNSAFE_END | |
598 | |
599 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
600 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
601 void* p = addr_from_java(addr); | |
602 size_t sz = (size_t)size; | |
603 if (sz != (julong)size || size < 0) { | |
604 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
605 } | |
606 if (sz == 0) { | |
607 os::free(p); | |
608 return 0; | |
609 } | |
610 sz = round_to(sz, HeapWordSize); | |
6197 | 611 void* x = (p == NULL) ? os::malloc(sz, mtInternal) : os::realloc(p, sz, mtInternal); |
0 | 612 if (x == NULL) { |
613 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
614 } | |
615 return addr_to_java(x); | |
616 UNSAFE_END | |
617 | |
618 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
619 UnsafeWrapper("Unsafe_FreeMemory"); | |
620 void* p = addr_from_java(addr); | |
621 if (p == NULL) { | |
622 return; | |
623 } | |
624 os::free(p); | |
625 UNSAFE_END | |
626 | |
627 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
628 UnsafeWrapper("Unsafe_SetMemory"); | |
629 size_t sz = (size_t)size; | |
630 if (sz != (julong)size || size < 0) { | |
631 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
632 } | |
633 char* p = (char*) addr_from_java(addr); | |
634 Copy::fill_to_memory_atomic(p, sz, value); | |
635 UNSAFE_END | |
636 | |
637 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
638 UnsafeWrapper("Unsafe_SetMemory"); | |
639 size_t sz = (size_t)size; | |
640 if (sz != (julong)size || size < 0) { | |
641 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
642 } | |
643 oop base = JNIHandles::resolve(obj); | |
644 void* p = index_oop_from_field_offset_long(base, offset); | |
645 Copy::fill_to_memory_atomic(p, sz, value); | |
646 UNSAFE_END | |
647 | |
648 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
649 UnsafeWrapper("Unsafe_CopyMemory"); | |
650 if (size == 0) { | |
651 return; | |
652 } | |
653 size_t sz = (size_t)size; | |
654 if (sz != (julong)size || size < 0) { | |
655 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
656 } | |
657 void* src = addr_from_java(srcAddr); | |
658 void* dst = addr_from_java(dstAddr); | |
659 Copy::conjoint_memory_atomic(src, dst, sz); | |
660 UNSAFE_END | |
661 | |
662 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
663 UnsafeWrapper("Unsafe_CopyMemory"); | |
664 if (size == 0) { | |
665 return; | |
666 } | |
667 size_t sz = (size_t)size; | |
668 if (sz != (julong)size || size < 0) { | |
669 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
670 } | |
671 oop srcp = JNIHandles::resolve(srcObj); | |
672 oop dstp = JNIHandles::resolve(dstObj); | |
673 if (dstp != NULL && !dstp->is_typeArray()) { | |
674 // NYI: This works only for non-oop arrays at present. | |
675 // Generalizing it would be reasonable, but requires card marking. | |
676 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
677 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
678 } | |
679 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
680 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
681 Copy::conjoint_memory_atomic(src, dst, sz); | |
682 UNSAFE_END | |
683 | |
684 | |
685 ////// Random queries | |
686 | |
687 // See comment at file start about UNSAFE_LEAF | |
688 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
689 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
690 UnsafeWrapper("Unsafe_AddressSize"); | |
691 return sizeof(void*); | |
692 UNSAFE_END | |
693 | |
694 // See comment at file start about UNSAFE_LEAF | |
695 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
696 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
697 UnsafeWrapper("Unsafe_PageSize"); | |
698 return os::vm_page_size(); | |
699 UNSAFE_END | |
700 | |
701 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
702 if (field == NULL) { | |
703 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
704 } | |
705 | |
706 oop reflected = JNIHandles::resolve_non_null(field); | |
707 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
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708 Klass* k = java_lang_Class::as_Klass(mirror); |
0 | 709 int slot = java_lang_reflect_Field::slot(reflected); |
710 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
711 | |
712 if (must_be_static >= 0) { | |
713 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
714 if (must_be_static != really_is_static) { | |
715 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
716 } | |
717 } | |
718 | |
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719 int offset = InstanceKlass::cast(k)->field_offset(slot); |
0 | 720 return field_offset_from_byte_offset(offset); |
721 } | |
722 | |
723 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
724 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
725 return find_field_offset(field, 0, THREAD); | |
726 UNSAFE_END | |
727 | |
728 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
729 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
730 return find_field_offset(field, 1, THREAD); | |
731 UNSAFE_END | |
732 | |
733 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
734 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
735 // Note: In this VM implementation, a field address is always a short | |
736 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
737 // range of the return type is never used. However, some implementations | |
738 // might put the static field inside an array shared by many classes, | |
739 // or even at a fixed address, in which case the address could be quite | |
740 // large. In that last case, this function would return NULL, since | |
741 // the address would operate alone, without any base pointer. | |
742 | |
743 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
744 | |
745 oop reflected = JNIHandles::resolve_non_null(field); | |
746 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
747 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
748 | |
749 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
750 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
751 } | |
752 | |
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753 return JNIHandles::make_local(env, mirror); |
0 | 754 UNSAFE_END |
755 | |
756 //@deprecated | |
757 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
758 UnsafeWrapper("Unsafe_FieldOffset"); | |
759 // tries (but fails) to be polymorphic between static and non-static: | |
760 jlong offset = find_field_offset(field, -1, THREAD); | |
761 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
762 return (jint)offset; | |
763 UNSAFE_END | |
764 | |
765 //@deprecated | |
766 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
767 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
768 if (clazz == NULL) { | |
769 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
770 } | |
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771 return JNIHandles::make_local(env, JNIHandles::resolve_non_null(clazz)); |
0 | 772 UNSAFE_END |
773 | |
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774 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
0 | 775 UnsafeWrapper("Unsafe_EnsureClassInitialized"); |
776 if (clazz == NULL) { | |
777 THROW(vmSymbols::java_lang_NullPointerException()); | |
778 } | |
779 oop mirror = JNIHandles::resolve_non_null(clazz); | |
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780 |
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781 Klass* klass = java_lang_Class::as_Klass(mirror); |
6983 | 782 if (klass != NULL && klass->should_be_initialized()) { |
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783 InstanceKlass* k = InstanceKlass::cast(klass); |
0 | 784 k->initialize(CHECK); |
785 } | |
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786 } |
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787 UNSAFE_END |
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788 |
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789 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
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790 UnsafeWrapper("Unsafe_ShouldBeInitialized"); |
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791 if (clazz == NULL) { |
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792 THROW_(vmSymbols::java_lang_NullPointerException(), false); |
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793 } |
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794 oop mirror = JNIHandles::resolve_non_null(clazz); |
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795 Klass* klass = java_lang_Class::as_Klass(mirror); |
6983 | 796 if (klass != NULL && klass->should_be_initialized()) { |
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797 return true; |
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798 } |
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799 return false; |
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800 } |
0 | 801 UNSAFE_END |
802 | |
803 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
804 if (acls == NULL) { | |
805 THROW(vmSymbols::java_lang_NullPointerException()); | |
806 } | |
807 oop mirror = JNIHandles::resolve_non_null(acls); | |
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808 Klass* k = java_lang_Class::as_Klass(mirror); |
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809 if (k == NULL || !k->oop_is_array()) { |
0 | 810 THROW(vmSymbols::java_lang_InvalidClassException()); |
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811 } else if (k->oop_is_objArray()) { |
0 | 812 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); |
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813 scale = heapOopSize; |
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814 } else if (k->oop_is_typeArray()) { |
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815 TypeArrayKlass* tak = TypeArrayKlass::cast(k); |
0 | 816 base = tak->array_header_in_bytes(); |
817 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
818 scale = (1 << tak->log2_element_size()); | |
819 } else { | |
820 ShouldNotReachHere(); | |
821 } | |
822 } | |
823 | |
824 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
825 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
826 int base, scale; | |
827 getBaseAndScale(base, scale, acls, CHECK_0); | |
828 return field_offset_from_byte_offset(base); | |
829 UNSAFE_END | |
830 | |
831 | |
832 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
833 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
834 int base, scale; | |
835 getBaseAndScale(base, scale, acls, CHECK_0); | |
836 // This VM packs both fields and array elements down to the byte. | |
837 // But watch out: If this changes, so that array references for | |
838 // a given primitive type (say, T_BOOLEAN) use different memory units | |
839 // than fields, this method MUST return zero for such arrays. | |
840 // For example, the VM used to store sub-word sized fields in full | |
841 // words in the object layout, so that accessors like getByte(Object,int) | |
842 // did not really do what one might expect for arrays. Therefore, | |
843 // this function used to report a zero scale factor, so that the user | |
844 // would know not to attempt to access sub-word array elements. | |
845 // // Code for unpacked fields: | |
846 // if (scale < wordSize) return 0; | |
847 | |
848 // The following allows for a pretty general fieldOffset cookie scheme, | |
849 // but requires it to be linear in byte offset. | |
850 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
851 UNSAFE_END | |
852 | |
853 | |
854 static inline void throw_new(JNIEnv *env, const char *ename) { | |
855 char buf[100]; | |
856 strcpy(buf, "java/lang/"); | |
857 strcat(buf, ename); | |
858 jclass cls = env->FindClass(buf); | |
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859 if (env->ExceptionCheck()) { |
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860 env->ExceptionClear(); |
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861 tty->print_cr("Unsafe: cannot throw %s because FindClass has failed", buf); |
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862 return; |
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863 } |
0 | 864 char* msg = NULL; |
865 env->ThrowNew(cls, msg); | |
866 } | |
867 | |
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868 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { |
0 | 869 { |
870 // Code lifted from JDK 1.3 ClassLoader.c | |
871 | |
872 jbyte *body; | |
873 char *utfName; | |
874 jclass result = 0; | |
875 char buf[128]; | |
876 | |
877 if (UsePerfData) { | |
878 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
879 } | |
880 | |
881 if (data == NULL) { | |
882 throw_new(env, "NullPointerException"); | |
883 return 0; | |
884 } | |
885 | |
886 /* Work around 4153825. malloc crashes on Solaris when passed a | |
887 * negative size. | |
888 */ | |
889 if (length < 0) { | |
890 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
891 return 0; | |
892 } | |
893 | |
6197 | 894 body = NEW_C_HEAP_ARRAY(jbyte, length, mtInternal); |
0 | 895 |
896 if (body == 0) { | |
897 throw_new(env, "OutOfMemoryError"); | |
898 return 0; | |
899 } | |
900 | |
901 env->GetByteArrayRegion(data, offset, length, body); | |
902 | |
903 if (env->ExceptionOccurred()) | |
904 goto free_body; | |
905 | |
906 if (name != NULL) { | |
907 uint len = env->GetStringUTFLength(name); | |
908 int unicode_len = env->GetStringLength(name); | |
909 if (len >= sizeof(buf)) { | |
6197 | 910 utfName = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); |
0 | 911 if (utfName == NULL) { |
912 throw_new(env, "OutOfMemoryError"); | |
913 goto free_body; | |
914 } | |
915 } else { | |
916 utfName = buf; | |
917 } | |
918 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
919 //VerifyFixClassname(utfName); | |
920 for (uint i = 0; i < len; i++) { | |
921 if (utfName[i] == '.') utfName[i] = '/'; | |
922 } | |
923 } else { | |
924 utfName = NULL; | |
925 } | |
926 | |
927 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
928 | |
929 if (utfName && utfName != buf) | |
6197 | 930 FREE_C_HEAP_ARRAY(char, utfName, mtInternal); |
0 | 931 |
932 free_body: | |
6197 | 933 FREE_C_HEAP_ARRAY(jbyte, body, mtInternal); |
0 | 934 return result; |
935 } | |
936 } | |
937 | |
938 | |
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939 UNSAFE_ENTRY(jclass, Unsafe_DefineClass(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd)) |
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940 UnsafeWrapper("Unsafe_DefineClass"); |
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941 { |
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942 ThreadToNativeFromVM ttnfv(thread); |
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943 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
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944 } |
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945 UNSAFE_END |
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946 |
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947 |
0 | 948 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) |
949 UnsafeWrapper("Unsafe_DefineClass"); | |
950 { | |
951 ThreadToNativeFromVM ttnfv(thread); | |
952 | |
953 int depthFromDefineClass0 = 1; | |
954 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
955 jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller); | |
956 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); | |
957 | |
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958 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
0 | 959 } |
960 UNSAFE_END | |
961 | |
962 | |
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963 #define DAC_Args CLS"[B["OBJ |
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964 // define a class but do not make it known to the class loader or system dictionary |
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965 // - host_class: supplies context for linkage, access control, protection domain, and class loader |
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966 // - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
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967 // - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
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968 |
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969 // When you load an anonymous class U, it works as if you changed its name just before loading, |
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970 // to a name that you will never use again. Since the name is lost, no other class can directly |
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971 // link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
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972 // through java.lang.Class methods like Class.newInstance. |
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973 |
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974 // Access checks for linkage sites within U continue to follow the same rules as for named classes. |
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975 // The package of an anonymous class is given by the package qualifier on the name under which it was loaded. |
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976 // An anonymous class also has special privileges to access any member of its host class. |
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977 // This is the main reason why this loading operation is unsafe. The purpose of this is to |
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978 // allow language implementations to simulate "open classes"; a host class in effect gets |
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979 // new code when an anonymous class is loaded alongside it. A less convenient but more |
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980 // standard way to do this is with reflection, which can also be set to ignore access |
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981 // restrictions. |
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982 |
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983 // Access into an anonymous class is possible only through reflection. Therefore, there |
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984 // are no special access rules for calling into an anonymous class. The relaxed access |
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985 // rule for the host class is applied in the opposite direction: A host class reflectively |
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986 // access one of its anonymous classes. |
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987 |
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988 // If you load the same bytecodes twice, you get two different classes. You can reload |
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989 // the same bytecodes with or without varying CP patches. |
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990 |
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991 // By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
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992 // The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
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993 // The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
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994 |
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995 // This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
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996 // an outer class (so that U2 is an anonymous inner class of anonymous U1). |
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997 // It is not possible for a named class, or an older anonymous class, to refer by |
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998 // name (via its CP) to a newer anonymous class. |
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999 |
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1000 // CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
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1001 // or type descriptors used in the loaded anonymous class. |
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1002 |
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1003 // Finally, CP patching may be used to introduce "live" objects into the constant pool, |
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1004 // instead of "dead" strings. A compiled statement like println((Object)"hello") can |
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1005 // be changed to println(greeting), where greeting is an arbitrary object created before |
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1006 // the anonymous class is loaded. This is useful in dynamic languages, in which |
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1007 // various kinds of metaobjects must be introduced as constants into bytecode. |
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1008 // Note the cast (Object), which tells the verifier to expect an arbitrary object, |
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1009 // not just a literal string. For such ldc instructions, the verifier uses the |
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1010 // type Object instead of String, if the loaded constant is not in fact a String. |
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1011 |
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1012 static instanceKlassHandle |
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1013 Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
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1014 jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
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1015 HeapWord* *temp_alloc, |
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1016 TRAPS) { |
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1017 |
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1018 if (UsePerfData) { |
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1019 ClassLoader::unsafe_defineClassCallCounter()->inc(); |
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1020 } |
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1021 |
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1022 if (data == NULL) { |
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1023 THROW_0(vmSymbols::java_lang_NullPointerException()); |
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1024 } |
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1025 |
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1026 jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
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1027 jint word_length = (length + sizeof(HeapWord)-1) / sizeof(HeapWord); |
6197 | 1028 HeapWord* body = NEW_C_HEAP_ARRAY(HeapWord, word_length, mtInternal); |
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1029 if (body == NULL) { |
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1030 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
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1031 } |
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1032 |
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1033 // caller responsible to free it: |
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1034 (*temp_alloc) = body; |
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1035 |
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1036 { |
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1037 jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
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1038 Copy::conjoint_words((HeapWord*) array_base, body, word_length); |
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1039 } |
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1040 |
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1041 u1* class_bytes = (u1*) body; |
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1042 int class_bytes_length = (int) length; |
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1043 if (class_bytes_length < 0) class_bytes_length = 0; |
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1044 if (class_bytes == NULL |
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1045 || host_class == NULL |
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1046 || length != class_bytes_length) |
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1047 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1048 |
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1049 objArrayHandle cp_patches_h; |
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1050 if (cp_patches_jh != NULL) { |
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1051 oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
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1052 if (!p->is_objArray()) |
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1053 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1054 cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
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1055 } |
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1056 |
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1057 KlassHandle host_klass(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(host_class))); |
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1058 const char* host_source = host_klass->external_name(); |
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1059 Handle host_loader(THREAD, host_klass->class_loader()); |
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1060 Handle host_domain(THREAD, host_klass->protection_domain()); |
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1061 |
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1062 GrowableArray<Handle>* cp_patches = NULL; |
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1063 if (cp_patches_h.not_null()) { |
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1064 int alen = cp_patches_h->length(); |
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1065 for (int i = alen-1; i >= 0; i--) { |
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1066 oop p = cp_patches_h->obj_at(i); |
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1067 if (p != NULL) { |
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1068 Handle patch(THREAD, p); |
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1069 if (cp_patches == NULL) |
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1070 cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
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1071 cp_patches->at_put(i, patch); |
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1072 } |
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1073 } |
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1074 } |
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1075 |
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1076 ClassFileStream st(class_bytes, class_bytes_length, (char*) host_source); |
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1077 |
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1078 instanceKlassHandle anon_klass; |
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1079 { |
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1080 Symbol* no_class_name = NULL; |
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1081 Klass* anonk = SystemDictionary::parse_stream(no_class_name, |
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1082 host_loader, host_domain, |
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1083 &st, host_klass, cp_patches, |
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1084 CHECK_NULL); |
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1085 if (anonk == NULL) return NULL; |
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1086 anon_klass = instanceKlassHandle(THREAD, anonk); |
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1087 } |
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1088 |
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1089 return anon_klass; |
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1090 } |
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1091 |
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1092 UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) |
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1093 { |
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1094 instanceKlassHandle anon_klass; |
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1095 jobject res_jh = NULL; |
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1096 |
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1097 UnsafeWrapper("Unsafe_DefineAnonymousClass"); |
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1098 ResourceMark rm(THREAD); |
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1099 |
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1100 HeapWord* temp_alloc = NULL; |
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1101 |
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1102 anon_klass = Unsafe_DefineAnonymousClass_impl(env, host_class, data, |
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1103 cp_patches_jh, |
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1104 &temp_alloc, THREAD); |
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1105 if (anon_klass() != NULL) |
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1106 res_jh = JNIHandles::make_local(env, anon_klass->java_mirror()); |
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1107 |
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1108 // try/finally clause: |
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1109 if (temp_alloc != NULL) { |
6197 | 1110 FREE_C_HEAP_ARRAY(HeapWord, temp_alloc, mtInternal); |
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1111 } |
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1112 |
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1113 // The anonymous class loader data has been artificially been kept alive to |
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1114 // this point. The mirror and any instances of this class have to keep |
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1115 // it alive afterwards. |
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1116 if (anon_klass() != NULL) { |
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1117 anon_klass->class_loader_data()->set_keep_alive(false); |
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1118 } |
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1119 |
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1120 // let caller initialize it as needed... |
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1121 |
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1122 return (jclass) res_jh; |
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1123 } |
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1124 UNSAFE_END |
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1125 |
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1126 |
0 | 1127 |
1128 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1129 UnsafeWrapper("Unsafe_MonitorEnter"); | |
1130 { | |
1131 if (jobj == NULL) { | |
1132 THROW(vmSymbols::java_lang_NullPointerException()); | |
1133 } | |
1134 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1135 ObjectSynchronizer::jni_enter(obj, CHECK); | |
1136 } | |
1137 UNSAFE_END | |
1138 | |
1139 | |
1140 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1141 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
1142 { | |
1143 if (jobj == NULL) { | |
1144 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
1145 } | |
1146 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1147 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
1148 return (res ? JNI_TRUE : JNI_FALSE); | |
1149 } | |
1150 UNSAFE_END | |
1151 | |
1152 | |
1153 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1154 UnsafeWrapper("Unsafe_MonitorExit"); | |
1155 { | |
1156 if (jobj == NULL) { | |
1157 THROW(vmSymbols::java_lang_NullPointerException()); | |
1158 } | |
1159 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
1160 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
1161 } | |
1162 UNSAFE_END | |
1163 | |
1164 | |
1165 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
1166 UnsafeWrapper("Unsafe_ThrowException"); | |
1167 { | |
1168 ThreadToNativeFromVM ttnfv(thread); | |
1169 env->Throw(thr); | |
1170 } | |
1171 UNSAFE_END | |
1172 | |
1173 // JSR166 ------------------------------------------------------------------ | |
1174 | |
1175 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
1176 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
1177 oop x = JNIHandles::resolve(x_h); | |
1178 oop e = JNIHandles::resolve(e_h); | |
1179 oop p = JNIHandles::resolve(obj); | |
113
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1180 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
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1181 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e, true); |
113
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1182 jboolean success = (res == e); |
0 | 1183 if (success) |
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1184 update_barrier_set((void*)addr, x); |
0 | 1185 return success; |
1186 UNSAFE_END | |
1187 | |
1188 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
1189 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
1190 oop p = JNIHandles::resolve(obj); | |
1191 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
1192 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
1193 UNSAFE_END | |
1194 | |
1195 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
1196 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
1197 Handle p (THREAD, JNIHandles::resolve(obj)); | |
1198 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
1199 if (VM_Version::supports_cx8()) | |
1200 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
1201 else { | |
1202 jboolean success = false; | |
1203 ObjectLocker ol(p, THREAD); | |
1204 if (*addr == e) { *addr = x; success = true; } | |
1205 return success; | |
1206 } | |
1207 UNSAFE_END | |
1208 | |
1209 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
1210 UnsafeWrapper("Unsafe_Park"); | |
10405 | 1211 EventThreadPark event; |
14380 | 1212 HOTSPOT_THREAD_PARK_BEGIN((uintptr_t) thread->parker(), (int) isAbsolute, time); |
1213 | |
0 | 1214 JavaThreadParkedState jtps(thread, time != 0); |
1215 thread->parker()->park(isAbsolute != 0, time); | |
14380 | 1216 |
1217 HOTSPOT_THREAD_PARK_END((uintptr_t) thread->parker()); | |
10405 | 1218 if (event.should_commit()) { |
1219 oop obj = thread->current_park_blocker(); | |
12316
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1220 event.set_klass((obj != NULL) ? obj->klass() : NULL); |
10405 | 1221 event.set_timeout(time); |
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1222 event.set_address((obj != NULL) ? (TYPE_ADDRESS) cast_from_oop<uintptr_t>(obj) : 0); |
10405 | 1223 event.commit(); |
1224 } | |
0 | 1225 UNSAFE_END |
1226 | |
1227 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
1228 UnsafeWrapper("Unsafe_Unpark"); | |
1229 Parker* p = NULL; | |
1230 if (jthread != NULL) { | |
1231 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
1232 if (java_thread != NULL) { | |
1233 jlong lp = java_lang_Thread::park_event(java_thread); | |
1234 if (lp != 0) { | |
1235 // This cast is OK even though the jlong might have been read | |
1236 // non-atomically on 32bit systems, since there, one word will | |
1237 // always be zero anyway and the value set is always the same | |
1238 p = (Parker*)addr_from_java(lp); | |
1239 } else { | |
1240 // Grab lock if apparently null or using older version of library | |
1241 MutexLocker mu(Threads_lock); | |
1242 java_thread = JNIHandles::resolve_non_null(jthread); | |
1243 if (java_thread != NULL) { | |
1244 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
1245 if (thr != NULL) { | |
1246 p = thr->parker(); | |
1247 if (p != NULL) { // Bind to Java thread for next time. | |
1248 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
1249 } | |
1250 } | |
1251 } | |
1252 } | |
1253 } | |
1254 } | |
1255 if (p != NULL) { | |
14380 | 1256 HOTSPOT_THREAD_UNPARK((uintptr_t) p); |
0 | 1257 p->unpark(); |
1258 } | |
1259 UNSAFE_END | |
1260 | |
1261 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
1262 UnsafeWrapper("Unsafe_Loadavg"); | |
1263 const int max_nelem = 3; | |
1264 double la[max_nelem]; | |
1265 jint ret; | |
1266 | |
1267 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
1268 assert(a->is_typeArray(), "must be type array"); | |
1269 | |
1270 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
1271 ThreadToNativeFromVM ttnfv(thread); | |
1272 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
1273 return -1; | |
1274 } | |
1275 | |
1276 ret = os::loadavg(la, nelem); | |
1277 if (ret == -1) return -1; | |
1278 | |
1279 // if successful, ret is the number of samples actually retrieved. | |
1280 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
1281 switch(ret) { | |
1282 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
1283 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
1284 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
1285 } | |
1286 return ret; | |
1287 UNSAFE_END | |
1288 | |
1289 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1290 UnsafeWrapper("Unsafe_PrefetchRead"); | |
1291 oop p = JNIHandles::resolve(obj); | |
1292 void* addr = index_oop_from_field_offset_long(p, 0); | |
1293 Prefetch::read(addr, (intx)offset); | |
1294 UNSAFE_END | |
1295 | |
1296 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1297 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
1298 oop p = JNIHandles::resolve(obj); | |
1299 void* addr = index_oop_from_field_offset_long(p, 0); | |
1300 Prefetch::write(addr, (intx)offset); | |
1301 UNSAFE_END | |
1302 | |
1303 | |
1304 /// JVM_RegisterUnsafeMethods | |
1305 | |
1306 #define ADR "J" | |
1307 | |
1308 #define LANG "Ljava/lang/" | |
1309 | |
1310 #define OBJ LANG"Object;" | |
1311 #define CLS LANG"Class;" | |
1312 #define CTR LANG"reflect/Constructor;" | |
1313 #define FLD LANG"reflect/Field;" | |
1314 #define MTH LANG"reflect/Method;" | |
1315 #define THR LANG"Throwable;" | |
1316 | |
1317 #define DC0_Args LANG"String;[BII" | |
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1318 #define DC_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" |
0 | 1319 |
1320 #define CC (char*) /*cast a literal from (const char*)*/ | |
1321 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
1322 | |
1323 // define deprecated accessors for compabitility with 1.4.0 | |
1324 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
1325 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
1326 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
1327 | |
1328 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
1329 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
1330 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1331 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
1332 | |
1333 // Note: In 1.5.0, there are volatile versions too | |
1334 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
1335 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1336 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
1337 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
1338 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
1339 | |
1340 | |
1341 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
1342 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
1343 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
1344 | |
1345 | |
1346 | |
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1347 // These are the methods for 1.4.0 |
0 | 1348 static JNINativeMethod methods_140[] = { |
1349 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
1350 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
1351 | |
1352 DECLARE_GETSETOOP_140(Boolean, Z), | |
1353 DECLARE_GETSETOOP_140(Byte, B), | |
1354 DECLARE_GETSETOOP_140(Short, S), | |
1355 DECLARE_GETSETOOP_140(Char, C), | |
1356 DECLARE_GETSETOOP_140(Int, I), | |
1357 DECLARE_GETSETOOP_140(Long, J), | |
1358 DECLARE_GETSETOOP_140(Float, F), | |
1359 DECLARE_GETSETOOP_140(Double, D), | |
1360 | |
1361 DECLARE_GETSETNATIVE(Byte, B), | |
1362 DECLARE_GETSETNATIVE(Short, S), | |
1363 DECLARE_GETSETNATIVE(Char, C), | |
1364 DECLARE_GETSETNATIVE(Int, I), | |
1365 DECLARE_GETSETNATIVE(Long, J), | |
1366 DECLARE_GETSETNATIVE(Float, F), | |
1367 DECLARE_GETSETNATIVE(Double, D), | |
1368 | |
1369 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1370 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1371 | |
1372 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1373 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1374 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1375 | |
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1376 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, |
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1377 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, |
0 | 1378 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
1379 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1380 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1381 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1382 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1383 | |
1384 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1385 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1386 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1387 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1388 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1389 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1390 }; | |
1391 | |
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1392 // These are the methods prior to the JSR 166 changes in 1.5.0 |
0 | 1393 static JNINativeMethod methods_141[] = { |
1394 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1395 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1396 | |
1397 DECLARE_GETSETOOP_141(Boolean, Z), | |
1398 DECLARE_GETSETOOP_141(Byte, B), | |
1399 DECLARE_GETSETOOP_141(Short, S), | |
1400 DECLARE_GETSETOOP_141(Char, C), | |
1401 DECLARE_GETSETOOP_141(Int, I), | |
1402 DECLARE_GETSETOOP_141(Long, J), | |
1403 DECLARE_GETSETOOP_141(Float, F), | |
1404 DECLARE_GETSETOOP_141(Double, D), | |
1405 | |
1406 DECLARE_GETSETNATIVE(Byte, B), | |
1407 DECLARE_GETSETNATIVE(Short, S), | |
1408 DECLARE_GETSETNATIVE(Char, C), | |
1409 DECLARE_GETSETNATIVE(Int, I), | |
1410 DECLARE_GETSETNATIVE(Long, J), | |
1411 DECLARE_GETSETNATIVE(Float, F), | |
1412 DECLARE_GETSETNATIVE(Double, D), | |
1413 | |
1414 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1415 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1416 | |
1417 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1418 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1419 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1420 | |
1421 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1422 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1423 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1424 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1425 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1426 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1427 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1428 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1429 | |
1430 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1431 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1432 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1433 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1434 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1435 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1436 | |
1437 }; | |
1438 | |
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1439 // These are the methods prior to the JSR 166 changes in 1.6.0 |
0 | 1440 static JNINativeMethod methods_15[] = { |
1441 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1442 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1443 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1444 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1445 | |
1446 | |
1447 DECLARE_GETSETOOP(Boolean, Z), | |
1448 DECLARE_GETSETOOP(Byte, B), | |
1449 DECLARE_GETSETOOP(Short, S), | |
1450 DECLARE_GETSETOOP(Char, C), | |
1451 DECLARE_GETSETOOP(Int, I), | |
1452 DECLARE_GETSETOOP(Long, J), | |
1453 DECLARE_GETSETOOP(Float, F), | |
1454 DECLARE_GETSETOOP(Double, D), | |
1455 | |
1456 DECLARE_GETSETNATIVE(Byte, B), | |
1457 DECLARE_GETSETNATIVE(Short, S), | |
1458 DECLARE_GETSETNATIVE(Char, C), | |
1459 DECLARE_GETSETNATIVE(Int, I), | |
1460 DECLARE_GETSETNATIVE(Long, J), | |
1461 DECLARE_GETSETNATIVE(Float, F), | |
1462 DECLARE_GETSETNATIVE(Double, D), | |
1463 | |
1464 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1465 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1466 | |
1467 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1468 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1469 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1470 | |
1471 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1472 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1473 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1474 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1475 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1476 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1477 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1478 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1479 | |
1480 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1481 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1482 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1483 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1484 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1485 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1486 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1487 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1488 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1489 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1490 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1491 | |
1492 }; | |
1493 | |
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1494 // These are the methods for 1.6.0 and 1.7.0 |
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1495 static JNINativeMethod methods_16[] = { |
0 | 1496 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
1497 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1498 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1499 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1500 | |
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1501 DECLARE_GETSETOOP(Boolean, Z), |
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1502 DECLARE_GETSETOOP(Byte, B), |
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1503 DECLARE_GETSETOOP(Short, S), |
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1504 DECLARE_GETSETOOP(Char, C), |
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1505 DECLARE_GETSETOOP(Int, I), |
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1506 DECLARE_GETSETOOP(Long, J), |
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1507 DECLARE_GETSETOOP(Float, F), |
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1508 DECLARE_GETSETOOP(Double, D), |
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1509 |
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1510 DECLARE_GETSETNATIVE(Byte, B), |
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1511 DECLARE_GETSETNATIVE(Short, S), |
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1512 DECLARE_GETSETNATIVE(Char, C), |
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1513 DECLARE_GETSETNATIVE(Int, I), |
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1514 DECLARE_GETSETNATIVE(Long, J), |
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1515 DECLARE_GETSETNATIVE(Float, F), |
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1516 DECLARE_GETSETNATIVE(Double, D), |
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1517 |
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1518 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, |
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1519 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, |
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1520 |
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1521 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, |
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1522 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, |
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1523 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, |
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1524 |
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1525 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, |
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1526 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, |
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1527 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, |
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1528 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
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1529 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, |
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1530 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, |
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1531 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, |
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1532 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, |
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1533 |
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1534 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, |
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1535 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
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1536 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
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1537 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, |
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1538 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, |
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1539 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, |
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1540 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, |
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1541 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, |
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1542 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, |
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1543 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, |
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1544 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, |
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1545 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, |
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1546 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, |
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1547 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, |
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1548 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} |
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1549 }; |
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1550 |
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1551 // These are the methods for 1.8.0 |
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1552 static JNINativeMethod methods_18[] = { |
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1553 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
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1554 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, |
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1555 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, |
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1556 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, |
0 | 1557 |
1558 DECLARE_GETSETOOP(Boolean, Z), | |
1559 DECLARE_GETSETOOP(Byte, B), | |
1560 DECLARE_GETSETOOP(Short, S), | |
1561 DECLARE_GETSETOOP(Char, C), | |
1562 DECLARE_GETSETOOP(Int, I), | |
1563 DECLARE_GETSETOOP(Long, J), | |
1564 DECLARE_GETSETOOP(Float, F), | |
1565 DECLARE_GETSETOOP(Double, D), | |
1566 | |
1567 DECLARE_GETSETNATIVE(Byte, B), | |
1568 DECLARE_GETSETNATIVE(Short, S), | |
1569 DECLARE_GETSETNATIVE(Char, C), | |
1570 DECLARE_GETSETNATIVE(Int, I), | |
1571 DECLARE_GETSETNATIVE(Long, J), | |
1572 DECLARE_GETSETNATIVE(Float, F), | |
1573 DECLARE_GETSETNATIVE(Double, D), | |
1574 | |
1575 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1576 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1577 | |
1578 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1579 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1580 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1581 | |
1582 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1583 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1584 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1585 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1586 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1587 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1588 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1589 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1590 | |
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1591 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1592 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1593 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1594 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1595 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
1596 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1597 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1598 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1599 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1600 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
1601 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
1602 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
1603 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1604 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1605 }; | |
1606 | |
1607 JNINativeMethod loadavg_method[] = { | |
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1608 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} |
0 | 1609 }; |
1610 | |
1611 JNINativeMethod prefetch_methods[] = { | |
1612 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1613 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
1614 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1615 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1616 }; | |
1617 | |
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1618 JNINativeMethod memcopy_methods_17[] = { |
0 | 1619 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, |
1620 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
1621 }; | |
1622 | |
1623 JNINativeMethod memcopy_methods_15[] = { | |
1624 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1625 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
1626 }; | |
1627 | |
431
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1628 JNINativeMethod anonk_methods[] = { |
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1629 {CC"defineAnonymousClass", CC"("DAC_Args")"CLS, FN_PTR(Unsafe_DefineAnonymousClass)}, |
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1630 }; |
0 | 1631 |
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1632 JNINativeMethod lform_methods[] = { |
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1633 {CC"shouldBeInitialized",CC"("CLS")Z", FN_PTR(Unsafe_ShouldBeInitialized)}, |
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1634 }; |
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1635 |
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1636 JNINativeMethod fence_methods[] = { |
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1637 {CC"loadFence", CC"()V", FN_PTR(Unsafe_LoadFence)}, |
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1638 {CC"storeFence", CC"()V", FN_PTR(Unsafe_StoreFence)}, |
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1639 {CC"fullFence", CC"()V", FN_PTR(Unsafe_FullFence)}, |
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1640 }; |
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1641 |
0 | 1642 #undef CC |
1643 #undef FN_PTR | |
1644 | |
1645 #undef ADR | |
1646 #undef LANG | |
1647 #undef OBJ | |
1648 #undef CLS | |
1649 #undef CTR | |
1650 #undef FLD | |
1651 #undef MTH | |
1652 #undef THR | |
1653 #undef DC0_Args | |
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1654 #undef DC_Args |
0 | 1655 |
1656 #undef DECLARE_GETSETOOP | |
1657 #undef DECLARE_GETSETNATIVE | |
1658 | |
1659 | |
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1660 /** |
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1661 * Helper method to register native methods. |
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1662 */ |
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1663 static bool register_natives(const char* message, JNIEnv* env, jclass clazz, const JNINativeMethod* methods, jint nMethods) { |
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1664 int status = env->RegisterNatives(clazz, methods, nMethods); |
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1665 if (status < 0 || env->ExceptionOccurred()) { |
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1666 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1667 tty->print_cr("Unsafe: failed registering %s", message); |
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1668 } |
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1669 env->ExceptionClear(); |
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1670 return false; |
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1671 } else { |
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1672 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1673 tty->print_cr("Unsafe: successfully registered %s", message); |
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1674 } |
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1675 return true; |
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1676 } |
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1677 } |
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1678 |
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1679 |
0 | 1680 // This one function is exported, used by NativeLookup. |
1681 // The Unsafe_xxx functions above are called only from the interpreter. | |
1682 // The optimizer looks at names and signatures to recognize | |
1683 // individual functions. | |
1684 | |
1685 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
1686 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
1687 { | |
1688 ThreadToNativeFromVM ttnfv(thread); | |
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1689 |
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1690 // Unsafe methods |
0 | 1691 { |
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1692 bool success = false; |
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1693 // We need to register the 1.6 methods first because the 1.8 methods would register fine on 1.7 and 1.6 |
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1694 if (!success) { |
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1695 success = register_natives("1.6 methods", env, unsafecls, methods_16, sizeof(methods_16)/sizeof(JNINativeMethod)); |
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1696 } |
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1697 if (!success) { |
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1698 success = register_natives("1.8 methods", env, unsafecls, methods_18, sizeof(methods_18)/sizeof(JNINativeMethod)); |
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1699 } |
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1700 if (!success) { |
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1701 success = register_natives("1.5 methods", env, unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); |
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1702 } |
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1703 if (!success) { |
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1704 success = register_natives("1.4.1 methods", env, unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); |
0 | 1705 } |
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1706 if (!success) { |
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1707 success = register_natives("1.4.0 methods", env, unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); |
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1708 } |
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1709 guarantee(success, "register unsafe natives"); |
0 | 1710 } |
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1711 |
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1712 // Unsafe.getLoadAverage |
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1713 register_natives("1.6 loadavg method", env, unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); |
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1714 |
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1715 // Prefetch methods |
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1716 register_natives("1.6 prefetch methods", env, unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); |
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1717 |
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1718 // Memory copy methods |
0 | 1719 { |
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1720 bool success = false; |
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1721 if (!success) { |
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1722 success = register_natives("1.7 memory copy methods", env, unsafecls, memcopy_methods_17, sizeof(memcopy_methods_17)/sizeof(JNINativeMethod)); |
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1723 } |
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1724 if (!success) { |
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1725 success = register_natives("1.5 memory copy methods", env, unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); |
0 | 1726 } |
1727 } | |
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1728 |
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1729 // Unsafe.defineAnonymousClass |
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1730 if (EnableInvokeDynamic) { |
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1731 register_natives("1.7 define anonymous class method", env, unsafecls, anonk_methods, sizeof(anonk_methods)/sizeof(JNINativeMethod)); |
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1732 } |
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1733 |
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1734 // Unsafe.shouldBeInitialized |
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1735 if (EnableInvokeDynamic) { |
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1736 register_natives("1.7 LambdaForm support", env, unsafecls, lform_methods, sizeof(lform_methods)/sizeof(JNINativeMethod)); |
0 | 1737 } |
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1738 |
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1739 // Fence methods |
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1740 register_natives("1.8 fence methods", env, unsafecls, fence_methods, sizeof(fence_methods)/sizeof(JNINativeMethod)); |
0 | 1741 } |
1742 JVM_END |