Mercurial > hg > graal-jvmci-8
annotate src/share/vm/prims/unsafe.cpp @ 10399:609aad72004a
8014246: remove assert to catch access to object headers in index_oop_from_field_offset_long
Reviewed-by: twisti, jrose
author | anoll |
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date | Thu, 06 Jun 2013 09:29:38 -0700 |
parents | 6b388e7d4905 |
children | f2110083203d |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2012, 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" | |
39 #include "utilities/copy.hpp" | |
40 #include "utilities/dtrace.hpp" | |
41 | |
0 | 42 /* |
43 * Implementation of class sun.misc.Unsafe | |
44 */ | |
45 | |
4006 | 46 #ifndef USDT2 |
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47 HS_DTRACE_PROBE_DECL3(hotspot, thread__park__begin, uintptr_t, int, long long); |
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48 HS_DTRACE_PROBE_DECL1(hotspot, thread__park__end, uintptr_t); |
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49 HS_DTRACE_PROBE_DECL1(hotspot, thread__unpark, uintptr_t); |
4006 | 50 #endif /* !USDT2 */ |
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51 |
0 | 52 #define MAX_OBJECT_SIZE \ |
53 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ | |
54 + ((julong)max_jint * sizeof(double)) ) | |
55 | |
56 | |
57 #define UNSAFE_ENTRY(result_type, header) \ | |
58 JVM_ENTRY(result_type, header) | |
59 | |
60 // Can't use UNSAFE_LEAF because it has the signature of a straight | |
61 // call into the runtime (just like JVM_LEAF, funny that) but it's | |
62 // called like a Java Native and thus the wrapper built for it passes | |
63 // arguments like a JNI call. It expects those arguments to be popped | |
64 // from the stack on Intel like all good JNI args are, and adjusts the | |
65 // stack according. Since the JVM_LEAF call expects no extra | |
66 // arguments the stack isn't popped in the C code, is pushed by the | |
67 // wrapper and we get sick. | |
68 //#define UNSAFE_LEAF(result_type, header) \ | |
69 // JVM_LEAF(result_type, header) | |
70 | |
71 #define UNSAFE_END JVM_END | |
72 | |
73 #define UnsafeWrapper(arg) /*nothing, for the present*/ | |
74 | |
75 | |
76 inline void* addr_from_java(jlong addr) { | |
77 // This assert fails in a variety of ways on 32-bit systems. | |
78 // It is impossible to predict whether native code that converts | |
79 // pointers to longs will sign-extend or zero-extend the addresses. | |
80 //assert(addr == (uintptr_t)addr, "must not be odd high bits"); | |
81 return (void*)(uintptr_t)addr; | |
82 } | |
83 | |
84 inline jlong addr_to_java(void* p) { | |
85 assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); | |
86 return (uintptr_t)p; | |
87 } | |
88 | |
89 | |
90 // Note: The VM's obj_field and related accessors use byte-scaled | |
91 // ("unscaled") offsets, just as the unsafe methods do. | |
92 | |
93 // However, the method Unsafe.fieldOffset explicitly declines to | |
94 // guarantee this. The field offset values manipulated by the Java user | |
95 // through the Unsafe API are opaque cookies that just happen to be byte | |
96 // offsets. We represent this state of affairs by passing the cookies | |
97 // through conversion functions when going between the VM and the Unsafe API. | |
98 // The conversion functions just happen to be no-ops at present. | |
99 | |
100 inline jlong field_offset_to_byte_offset(jlong field_offset) { | |
101 return field_offset; | |
102 } | |
103 | |
104 inline jlong field_offset_from_byte_offset(jlong byte_offset) { | |
105 return byte_offset; | |
106 } | |
107 | |
108 inline jint invocation_key_from_method_slot(jint slot) { | |
109 return slot; | |
110 } | |
111 | |
112 inline jint invocation_key_to_method_slot(jint key) { | |
113 return key; | |
114 } | |
115 | |
116 inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { | |
117 jlong byte_offset = field_offset_to_byte_offset(field_offset); | |
118 #ifdef ASSERT | |
119 if (p != NULL) { | |
120 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
121 if (byte_offset == (jint)byte_offset) { | |
122 void* ptr_plus_disp = (address)p + byte_offset; | |
113
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123 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
0 | 124 "raw [ptr+disp] must be consistent with oop::field_base"); |
125 } | |
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126 jlong p_size = HeapWordSize * (jlong)(p->size()); |
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127 assert(byte_offset < p_size, err_msg("Unsafe access: offset " INT64_FORMAT " > object's size " INT64_FORMAT, byte_offset, p_size)); |
0 | 128 } |
129 #endif | |
130 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
131 return (address)p + (jint) byte_offset; | |
132 else | |
133 return (address)p + byte_offset; | |
134 } | |
135 | |
136 // Externally callable versions: | |
137 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
138 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
139 return field_offset; | |
140 } | |
141 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
142 return byte_offset; | |
143 } | |
144 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
145 return invocation_key_from_method_slot(slot); | |
146 } | |
147 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
148 return invocation_key_to_method_slot(key); | |
149 } | |
150 | |
151 | |
152 ///// Data in the Java heap. | |
153 | |
154 #define GET_FIELD(obj, offset, type_name, v) \ | |
155 oop p = JNIHandles::resolve(obj); \ | |
156 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
157 | |
158 #define SET_FIELD(obj, offset, type_name, x) \ | |
159 oop p = JNIHandles::resolve(obj); \ | |
160 *(type_name*)index_oop_from_field_offset_long(p, offset) = x | |
161 | |
162 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
163 oop p = JNIHandles::resolve(obj); \ | |
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164 volatile type_name v = OrderAccess::load_acquire((volatile type_name*)index_oop_from_field_offset_long(p, offset)); |
0 | 165 |
166 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
167 oop p = JNIHandles::resolve(obj); \ | |
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168 OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), x); |
0 | 169 |
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170 // Macros for oops that check UseCompressedOops |
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171 |
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172 #define GET_OOP_FIELD(obj, offset, v) \ |
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173 oop p = JNIHandles::resolve(obj); \ |
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174 oop v; \ |
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175 if (UseCompressedOops) { \ |
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176 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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177 v = oopDesc::decode_heap_oop(n); \ |
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178 } else { \ |
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179 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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180 } |
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181 |
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182 |
0 | 183 // Get/SetObject must be special-cased, since it works with handles. |
184 | |
185 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
186 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
187 UnsafeWrapper("Unsafe_GetObject"); | |
188 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
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189 GET_OOP_FIELD(obj, offset, v) |
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190 jobject ret = JNIHandles::make_local(env, v); |
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191 #if INCLUDE_ALL_GCS |
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192 // We could be accessing the referent field in a reference |
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193 // object. If G1 is enabled then we need to register a non-null |
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194 // referent with the SATB barrier. |
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195 if (UseG1GC) { |
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196 bool needs_barrier = false; |
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197 |
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198 if (ret != NULL) { |
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199 if (offset == java_lang_ref_Reference::referent_offset) { |
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200 oop o = JNIHandles::resolve_non_null(obj); |
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201 Klass* k = o->klass(); |
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202 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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203 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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204 needs_barrier = true; |
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205 } |
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206 } |
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207 } |
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208 |
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209 if (needs_barrier) { |
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210 oop referent = JNIHandles::resolve(ret); |
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211 G1SATBCardTableModRefBS::enqueue(referent); |
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212 } |
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213 } |
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214 #endif // INCLUDE_ALL_GCS |
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215 return ret; |
0 | 216 UNSAFE_END |
217 | |
218 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
219 UnsafeWrapper("Unsafe_SetObject"); | |
220 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
221 oop x = JNIHandles::resolve(x_h); | |
222 //SET_FIELD(obj, offset, oop, x); | |
223 oop p = JNIHandles::resolve(obj); | |
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224 if (UseCompressedOops) { |
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225 if (x != NULL) { |
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226 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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227 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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228 } else { |
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229 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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230 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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231 } |
0 | 232 } else { |
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233 if (x != NULL) { |
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234 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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235 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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236 } else { |
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237 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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238 } |
0 | 239 } |
240 UNSAFE_END | |
241 | |
242 // The normal variants allow a null base pointer with an arbitrary address. | |
243 // But if the base pointer is non-null, the offset should make some sense. | |
244 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
245 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
246 UnsafeWrapper("Unsafe_GetObject"); | |
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247 GET_OOP_FIELD(obj, offset, v) |
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248 jobject ret = JNIHandles::make_local(env, v); |
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249 #if INCLUDE_ALL_GCS |
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250 // We could be accessing the referent field in a reference |
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251 // object. If G1 is enabled then we need to register non-null |
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252 // referent with the SATB barrier. |
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253 if (UseG1GC) { |
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254 bool needs_barrier = false; |
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255 |
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256 if (ret != NULL) { |
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257 if (offset == java_lang_ref_Reference::referent_offset && obj != NULL) { |
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258 oop o = JNIHandles::resolve(obj); |
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259 Klass* k = o->klass(); |
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260 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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261 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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262 needs_barrier = true; |
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263 } |
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264 } |
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265 } |
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266 |
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267 if (needs_barrier) { |
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268 oop referent = JNIHandles::resolve(ret); |
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269 G1SATBCardTableModRefBS::enqueue(referent); |
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270 } |
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271 } |
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272 #endif // INCLUDE_ALL_GCS |
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273 return ret; |
0 | 274 UNSAFE_END |
275 | |
276 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
277 UnsafeWrapper("Unsafe_SetObject"); | |
278 oop x = JNIHandles::resolve(x_h); | |
279 oop p = JNIHandles::resolve(obj); | |
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280 if (UseCompressedOops) { |
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281 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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282 } else { |
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283 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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284 } |
0 | 285 UNSAFE_END |
286 | |
287 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
288 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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289 oop p = JNIHandles::resolve(obj); |
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290 void* addr = index_oop_from_field_offset_long(p, offset); |
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291 volatile oop v; |
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292 if (UseCompressedOops) { |
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293 volatile narrowOop n = *(volatile narrowOop*) addr; |
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294 v = oopDesc::decode_heap_oop(n); |
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295 } else { |
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296 v = *(volatile oop*) addr; |
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297 } |
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298 OrderAccess::acquire(); |
0 | 299 return JNIHandles::make_local(env, v); |
300 UNSAFE_END | |
301 | |
302 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
303 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
304 oop x = JNIHandles::resolve(x_h); | |
305 oop p = JNIHandles::resolve(obj); | |
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306 void* addr = index_oop_from_field_offset_long(p, offset); |
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307 OrderAccess::release(); |
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308 if (UseCompressedOops) { |
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309 oop_store((narrowOop*)addr, x); |
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310 } else { |
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311 oop_store((oop*)addr, x); |
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312 } |
0 | 313 OrderAccess::fence(); |
314 UNSAFE_END | |
315 | |
10235 | 316 #ifndef SUPPORTS_NATIVE_CX8 |
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317 // Keep old code for platforms which may not have atomic jlong (8 bytes) instructions |
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318 |
0 | 319 // Volatile long versions must use locks if !VM_Version::supports_cx8(). |
320 // support_cx8 is a surrogate for 'supports atomic long memory ops'. | |
321 | |
322 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
323 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
324 { | |
325 if (VM_Version::supports_cx8()) { | |
326 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
327 return v; | |
328 } | |
329 else { | |
330 Handle p (THREAD, JNIHandles::resolve(obj)); | |
331 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
332 ObjectLocker ol(p, THREAD); | |
333 jlong value = *addr; | |
334 return value; | |
335 } | |
336 } | |
337 UNSAFE_END | |
338 | |
339 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
340 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
341 { | |
342 if (VM_Version::supports_cx8()) { | |
343 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
344 } | |
345 else { | |
346 Handle p (THREAD, JNIHandles::resolve(obj)); | |
347 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
348 ObjectLocker ol(p, THREAD); | |
349 *addr = x; | |
350 } | |
351 } | |
352 UNSAFE_END | |
353 | |
10235 | 354 #endif // not SUPPORTS_NATIVE_CX8 |
0 | 355 |
356 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
357 \ | |
358 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
359 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
360 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
361 GET_FIELD(obj, offset, jboolean, v); \ | |
362 return v; \ | |
363 UNSAFE_END \ | |
364 \ | |
365 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
366 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
367 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
368 SET_FIELD(obj, offset, jboolean, x); \ | |
369 UNSAFE_END \ | |
370 \ | |
371 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
372 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
373 GET_FIELD(obj, offset, jboolean, v); \ | |
374 return v; \ | |
375 UNSAFE_END \ | |
376 \ | |
377 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
378 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
379 SET_FIELD(obj, offset, jboolean, x); \ | |
380 UNSAFE_END \ | |
381 \ | |
382 // END DEFINE_GETSETOOP. | |
383 | |
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384 DEFINE_GETSETOOP(jboolean, Boolean) |
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385 DEFINE_GETSETOOP(jbyte, Byte) |
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386 DEFINE_GETSETOOP(jshort, Short); |
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387 DEFINE_GETSETOOP(jchar, Char); |
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388 DEFINE_GETSETOOP(jint, Int); |
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389 DEFINE_GETSETOOP(jlong, Long); |
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390 DEFINE_GETSETOOP(jfloat, Float); |
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391 DEFINE_GETSETOOP(jdouble, Double); |
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392 |
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393 #undef DEFINE_GETSETOOP |
0 | 394 |
395 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
396 \ | |
397 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
398 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
399 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
400 return v; \ | |
401 UNSAFE_END \ | |
402 \ | |
403 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
404 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
405 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
406 UNSAFE_END \ | |
407 \ | |
408 // END DEFINE_GETSETOOP_VOLATILE. | |
409 | |
410 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
411 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
412 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
413 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
414 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
415 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
416 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
417 | |
10235 | 418 #ifdef SUPPORTS_NATIVE_CX8 |
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419 DEFINE_GETSETOOP_VOLATILE(jlong, Long); |
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420 #endif |
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421 |
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422 #undef DEFINE_GETSETOOP_VOLATILE |
0 | 423 |
424 // The non-intrinsified versions of setOrdered just use setVolatile | |
425 | |
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426 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) |
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427 UnsafeWrapper("Unsafe_SetOrderedInt"); |
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428 SET_FIELD_VOLATILE(obj, offset, jint, x); |
0 | 429 UNSAFE_END |
430 | |
431 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
432 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
433 oop x = JNIHandles::resolve(x_h); | |
434 oop p = JNIHandles::resolve(obj); | |
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435 void* addr = index_oop_from_field_offset_long(p, offset); |
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436 OrderAccess::release(); |
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437 if (UseCompressedOops) { |
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438 oop_store((narrowOop*)addr, x); |
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439 } else { |
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440 oop_store((oop*)addr, x); |
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441 } |
0 | 442 OrderAccess::fence(); |
443 UNSAFE_END | |
444 | |
445 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
446 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
10235 | 447 #ifdef SUPPORTS_NATIVE_CX8 |
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448 SET_FIELD_VOLATILE(obj, offset, jlong, x); |
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449 #else |
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450 // Keep old code for platforms which may not have atomic long (8 bytes) instructions |
0 | 451 { |
452 if (VM_Version::supports_cx8()) { | |
453 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
454 } | |
455 else { | |
456 Handle p (THREAD, JNIHandles::resolve(obj)); | |
457 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
458 ObjectLocker ol(p, THREAD); | |
459 *addr = x; | |
460 } | |
461 } | |
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462 #endif |
0 | 463 UNSAFE_END |
464 | |
7425 | 465 UNSAFE_ENTRY(void, Unsafe_LoadFence(JNIEnv *env, jobject unsafe)) |
466 UnsafeWrapper("Unsafe_LoadFence"); | |
467 OrderAccess::acquire(); | |
468 UNSAFE_END | |
469 | |
470 UNSAFE_ENTRY(void, Unsafe_StoreFence(JNIEnv *env, jobject unsafe)) | |
471 UnsafeWrapper("Unsafe_StoreFence"); | |
472 OrderAccess::release(); | |
473 UNSAFE_END | |
474 | |
475 UNSAFE_ENTRY(void, Unsafe_FullFence(JNIEnv *env, jobject unsafe)) | |
476 UnsafeWrapper("Unsafe_FullFence"); | |
477 OrderAccess::fence(); | |
478 UNSAFE_END | |
479 | |
0 | 480 ////// Data in the C heap. |
481 | |
482 // Note: These do not throw NullPointerException for bad pointers. | |
483 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
484 // | |
485 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
486 \ | |
487 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
488 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
489 void* p = addr_from_java(addr); \ | |
490 JavaThread* t = JavaThread::current(); \ | |
491 t->set_doing_unsafe_access(true); \ | |
492 java_type x = *(volatile native_type*)p; \ | |
493 t->set_doing_unsafe_access(false); \ | |
494 return x; \ | |
495 UNSAFE_END \ | |
496 \ | |
497 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
498 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
499 JavaThread* t = JavaThread::current(); \ | |
500 t->set_doing_unsafe_access(true); \ | |
501 void* p = addr_from_java(addr); \ | |
502 *(volatile native_type*)p = x; \ | |
503 t->set_doing_unsafe_access(false); \ | |
504 UNSAFE_END \ | |
505 \ | |
506 // END DEFINE_GETSETNATIVE. | |
507 | |
508 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
509 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
510 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
511 DEFINE_GETSETNATIVE(jint, Int, jint); | |
512 // no long -- handled specially | |
513 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
514 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
515 | |
516 #undef DEFINE_GETSETNATIVE | |
517 | |
518 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
519 UnsafeWrapper("Unsafe_GetNativeLong"); | |
520 JavaThread* t = JavaThread::current(); | |
521 // We do it this way to avoid problems with access to heap using 64 | |
522 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
523 // some CPUs (SPARC) it leads to SIGBUS. | |
524 t->set_doing_unsafe_access(true); | |
525 void* p = addr_from_java(addr); | |
526 jlong x; | |
527 if (((intptr_t)p & 7) == 0) { | |
528 // jlong is aligned, do a volatile access | |
529 x = *(volatile jlong*)p; | |
530 } else { | |
531 jlong_accessor acc; | |
532 acc.words[0] = ((volatile jint*)p)[0]; | |
533 acc.words[1] = ((volatile jint*)p)[1]; | |
534 x = acc.long_value; | |
535 } | |
536 t->set_doing_unsafe_access(false); | |
537 return x; | |
538 UNSAFE_END | |
539 | |
540 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
541 UnsafeWrapper("Unsafe_SetNativeLong"); | |
542 JavaThread* t = JavaThread::current(); | |
543 // see comment for Unsafe_GetNativeLong | |
544 t->set_doing_unsafe_access(true); | |
545 void* p = addr_from_java(addr); | |
546 if (((intptr_t)p & 7) == 0) { | |
547 // jlong is aligned, do a volatile access | |
548 *(volatile jlong*)p = x; | |
549 } else { | |
550 jlong_accessor acc; | |
551 acc.long_value = x; | |
552 ((volatile jint*)p)[0] = acc.words[0]; | |
553 ((volatile jint*)p)[1] = acc.words[1]; | |
554 } | |
555 t->set_doing_unsafe_access(false); | |
556 UNSAFE_END | |
557 | |
558 | |
559 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
560 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
561 void* p = addr_from_java(addr); | |
562 return addr_to_java(*(void**)p); | |
563 UNSAFE_END | |
564 | |
565 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
566 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
567 void* p = addr_from_java(addr); | |
568 *(void**)p = addr_from_java(x); | |
569 UNSAFE_END | |
570 | |
571 | |
572 ////// Allocation requests | |
573 | |
574 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
575 UnsafeWrapper("Unsafe_AllocateInstance"); | |
576 { | |
577 ThreadToNativeFromVM ttnfv(thread); | |
578 return env->AllocObject(cls); | |
579 } | |
580 UNSAFE_END | |
581 | |
582 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
583 UnsafeWrapper("Unsafe_AllocateMemory"); | |
584 size_t sz = (size_t)size; | |
585 if (sz != (julong)size || size < 0) { | |
586 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
587 } | |
588 if (sz == 0) { | |
589 return 0; | |
590 } | |
591 sz = round_to(sz, HeapWordSize); | |
6197 | 592 void* x = os::malloc(sz, mtInternal); |
0 | 593 if (x == NULL) { |
594 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
595 } | |
596 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
597 return addr_to_java(x); | |
598 UNSAFE_END | |
599 | |
600 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
601 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
602 void* p = addr_from_java(addr); | |
603 size_t sz = (size_t)size; | |
604 if (sz != (julong)size || size < 0) { | |
605 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
606 } | |
607 if (sz == 0) { | |
608 os::free(p); | |
609 return 0; | |
610 } | |
611 sz = round_to(sz, HeapWordSize); | |
6197 | 612 void* x = (p == NULL) ? os::malloc(sz, mtInternal) : os::realloc(p, sz, mtInternal); |
0 | 613 if (x == NULL) { |
614 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
615 } | |
616 return addr_to_java(x); | |
617 UNSAFE_END | |
618 | |
619 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
620 UnsafeWrapper("Unsafe_FreeMemory"); | |
621 void* p = addr_from_java(addr); | |
622 if (p == NULL) { | |
623 return; | |
624 } | |
625 os::free(p); | |
626 UNSAFE_END | |
627 | |
628 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
629 UnsafeWrapper("Unsafe_SetMemory"); | |
630 size_t sz = (size_t)size; | |
631 if (sz != (julong)size || size < 0) { | |
632 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
633 } | |
634 char* p = (char*) addr_from_java(addr); | |
635 Copy::fill_to_memory_atomic(p, sz, value); | |
636 UNSAFE_END | |
637 | |
638 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
639 UnsafeWrapper("Unsafe_SetMemory"); | |
640 size_t sz = (size_t)size; | |
641 if (sz != (julong)size || size < 0) { | |
642 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
643 } | |
644 oop base = JNIHandles::resolve(obj); | |
645 void* p = index_oop_from_field_offset_long(base, offset); | |
646 Copy::fill_to_memory_atomic(p, sz, value); | |
647 UNSAFE_END | |
648 | |
649 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
650 UnsafeWrapper("Unsafe_CopyMemory"); | |
651 if (size == 0) { | |
652 return; | |
653 } | |
654 size_t sz = (size_t)size; | |
655 if (sz != (julong)size || size < 0) { | |
656 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
657 } | |
658 void* src = addr_from_java(srcAddr); | |
659 void* dst = addr_from_java(dstAddr); | |
660 Copy::conjoint_memory_atomic(src, dst, sz); | |
661 UNSAFE_END | |
662 | |
663 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
664 UnsafeWrapper("Unsafe_CopyMemory"); | |
665 if (size == 0) { | |
666 return; | |
667 } | |
668 size_t sz = (size_t)size; | |
669 if (sz != (julong)size || size < 0) { | |
670 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
671 } | |
672 oop srcp = JNIHandles::resolve(srcObj); | |
673 oop dstp = JNIHandles::resolve(dstObj); | |
674 if (dstp != NULL && !dstp->is_typeArray()) { | |
675 // NYI: This works only for non-oop arrays at present. | |
676 // Generalizing it would be reasonable, but requires card marking. | |
677 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
678 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
679 } | |
680 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
681 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
682 Copy::conjoint_memory_atomic(src, dst, sz); | |
683 UNSAFE_END | |
684 | |
685 | |
686 ////// Random queries | |
687 | |
688 // See comment at file start about UNSAFE_LEAF | |
689 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
690 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
691 UnsafeWrapper("Unsafe_AddressSize"); | |
692 return sizeof(void*); | |
693 UNSAFE_END | |
694 | |
695 // See comment at file start about UNSAFE_LEAF | |
696 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
697 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
698 UnsafeWrapper("Unsafe_PageSize"); | |
699 return os::vm_page_size(); | |
700 UNSAFE_END | |
701 | |
702 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
703 if (field == NULL) { | |
704 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
705 } | |
706 | |
707 oop reflected = JNIHandles::resolve_non_null(field); | |
708 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
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709 Klass* k = java_lang_Class::as_Klass(mirror); |
0 | 710 int slot = java_lang_reflect_Field::slot(reflected); |
711 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
712 | |
713 if (must_be_static >= 0) { | |
714 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
715 if (must_be_static != really_is_static) { | |
716 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
717 } | |
718 } | |
719 | |
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720 int offset = InstanceKlass::cast(k)->field_offset(slot); |
0 | 721 return field_offset_from_byte_offset(offset); |
722 } | |
723 | |
724 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
725 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
726 return find_field_offset(field, 0, THREAD); | |
727 UNSAFE_END | |
728 | |
729 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
730 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
731 return find_field_offset(field, 1, THREAD); | |
732 UNSAFE_END | |
733 | |
734 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
735 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
736 // Note: In this VM implementation, a field address is always a short | |
737 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
738 // range of the return type is never used. However, some implementations | |
739 // might put the static field inside an array shared by many classes, | |
740 // or even at a fixed address, in which case the address could be quite | |
741 // large. In that last case, this function would return NULL, since | |
742 // the address would operate alone, without any base pointer. | |
743 | |
744 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
745 | |
746 oop reflected = JNIHandles::resolve_non_null(field); | |
747 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
748 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
749 | |
750 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
751 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
752 } | |
753 | |
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754 return JNIHandles::make_local(env, mirror); |
0 | 755 UNSAFE_END |
756 | |
757 //@deprecated | |
758 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
759 UnsafeWrapper("Unsafe_FieldOffset"); | |
760 // tries (but fails) to be polymorphic between static and non-static: | |
761 jlong offset = find_field_offset(field, -1, THREAD); | |
762 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
763 return (jint)offset; | |
764 UNSAFE_END | |
765 | |
766 //@deprecated | |
767 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
768 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
769 if (clazz == NULL) { | |
770 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
771 } | |
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772 return JNIHandles::make_local(env, JNIHandles::resolve_non_null(clazz)); |
0 | 773 UNSAFE_END |
774 | |
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775 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
0 | 776 UnsafeWrapper("Unsafe_EnsureClassInitialized"); |
777 if (clazz == NULL) { | |
778 THROW(vmSymbols::java_lang_NullPointerException()); | |
779 } | |
780 oop mirror = JNIHandles::resolve_non_null(clazz); | |
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781 |
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782 Klass* klass = java_lang_Class::as_Klass(mirror); |
6983 | 783 if (klass != NULL && klass->should_be_initialized()) { |
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784 InstanceKlass* k = InstanceKlass::cast(klass); |
0 | 785 k->initialize(CHECK); |
786 } | |
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787 } |
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788 UNSAFE_END |
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789 |
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790 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
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791 UnsafeWrapper("Unsafe_ShouldBeInitialized"); |
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792 if (clazz == NULL) { |
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793 THROW_(vmSymbols::java_lang_NullPointerException(), false); |
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794 } |
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795 oop mirror = JNIHandles::resolve_non_null(clazz); |
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796 Klass* klass = java_lang_Class::as_Klass(mirror); |
6983 | 797 if (klass != NULL && klass->should_be_initialized()) { |
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798 return true; |
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799 } |
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800 return false; |
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801 } |
0 | 802 UNSAFE_END |
803 | |
804 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
805 if (acls == NULL) { | |
806 THROW(vmSymbols::java_lang_NullPointerException()); | |
807 } | |
808 oop mirror = JNIHandles::resolve_non_null(acls); | |
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809 Klass* k = java_lang_Class::as_Klass(mirror); |
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810 if (k == NULL || !k->oop_is_array()) { |
0 | 811 THROW(vmSymbols::java_lang_InvalidClassException()); |
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812 } else if (k->oop_is_objArray()) { |
0 | 813 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); |
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814 scale = heapOopSize; |
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815 } else if (k->oop_is_typeArray()) { |
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816 TypeArrayKlass* tak = TypeArrayKlass::cast(k); |
0 | 817 base = tak->array_header_in_bytes(); |
818 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
819 scale = (1 << tak->log2_element_size()); | |
820 } else { | |
821 ShouldNotReachHere(); | |
822 } | |
823 } | |
824 | |
825 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
826 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
827 int base, scale; | |
828 getBaseAndScale(base, scale, acls, CHECK_0); | |
829 return field_offset_from_byte_offset(base); | |
830 UNSAFE_END | |
831 | |
832 | |
833 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
834 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
835 int base, scale; | |
836 getBaseAndScale(base, scale, acls, CHECK_0); | |
837 // This VM packs both fields and array elements down to the byte. | |
838 // But watch out: If this changes, so that array references for | |
839 // a given primitive type (say, T_BOOLEAN) use different memory units | |
840 // than fields, this method MUST return zero for such arrays. | |
841 // For example, the VM used to store sub-word sized fields in full | |
842 // words in the object layout, so that accessors like getByte(Object,int) | |
843 // did not really do what one might expect for arrays. Therefore, | |
844 // this function used to report a zero scale factor, so that the user | |
845 // would know not to attempt to access sub-word array elements. | |
846 // // Code for unpacked fields: | |
847 // if (scale < wordSize) return 0; | |
848 | |
849 // The following allows for a pretty general fieldOffset cookie scheme, | |
850 // but requires it to be linear in byte offset. | |
851 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
852 UNSAFE_END | |
853 | |
854 | |
855 static inline void throw_new(JNIEnv *env, const char *ename) { | |
856 char buf[100]; | |
857 strcpy(buf, "java/lang/"); | |
858 strcat(buf, ename); | |
859 jclass cls = env->FindClass(buf); | |
860 char* msg = NULL; | |
861 env->ThrowNew(cls, msg); | |
862 } | |
863 | |
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864 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { |
0 | 865 { |
866 // Code lifted from JDK 1.3 ClassLoader.c | |
867 | |
868 jbyte *body; | |
869 char *utfName; | |
870 jclass result = 0; | |
871 char buf[128]; | |
872 | |
873 if (UsePerfData) { | |
874 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
875 } | |
876 | |
877 if (data == NULL) { | |
878 throw_new(env, "NullPointerException"); | |
879 return 0; | |
880 } | |
881 | |
882 /* Work around 4153825. malloc crashes on Solaris when passed a | |
883 * negative size. | |
884 */ | |
885 if (length < 0) { | |
886 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
887 return 0; | |
888 } | |
889 | |
6197 | 890 body = NEW_C_HEAP_ARRAY(jbyte, length, mtInternal); |
0 | 891 |
892 if (body == 0) { | |
893 throw_new(env, "OutOfMemoryError"); | |
894 return 0; | |
895 } | |
896 | |
897 env->GetByteArrayRegion(data, offset, length, body); | |
898 | |
899 if (env->ExceptionOccurred()) | |
900 goto free_body; | |
901 | |
902 if (name != NULL) { | |
903 uint len = env->GetStringUTFLength(name); | |
904 int unicode_len = env->GetStringLength(name); | |
905 if (len >= sizeof(buf)) { | |
6197 | 906 utfName = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); |
0 | 907 if (utfName == NULL) { |
908 throw_new(env, "OutOfMemoryError"); | |
909 goto free_body; | |
910 } | |
911 } else { | |
912 utfName = buf; | |
913 } | |
914 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
915 //VerifyFixClassname(utfName); | |
916 for (uint i = 0; i < len; i++) { | |
917 if (utfName[i] == '.') utfName[i] = '/'; | |
918 } | |
919 } else { | |
920 utfName = NULL; | |
921 } | |
922 | |
923 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
924 | |
925 if (utfName && utfName != buf) | |
6197 | 926 FREE_C_HEAP_ARRAY(char, utfName, mtInternal); |
0 | 927 |
928 free_body: | |
6197 | 929 FREE_C_HEAP_ARRAY(jbyte, body, mtInternal); |
0 | 930 return result; |
931 } | |
932 } | |
933 | |
934 | |
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935 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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936 UnsafeWrapper("Unsafe_DefineClass"); |
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937 { |
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938 ThreadToNativeFromVM ttnfv(thread); |
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939 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
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940 } |
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941 UNSAFE_END |
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942 |
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943 |
0 | 944 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) |
945 UnsafeWrapper("Unsafe_DefineClass"); | |
946 { | |
947 ThreadToNativeFromVM ttnfv(thread); | |
948 | |
949 int depthFromDefineClass0 = 1; | |
950 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
951 jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller); | |
952 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); | |
953 | |
8866
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954 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
0 | 955 } |
956 UNSAFE_END | |
957 | |
958 | |
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959 #define DAC_Args CLS"[B["OBJ |
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960 // define a class but do not make it known to the class loader or system dictionary |
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961 // - host_class: supplies context for linkage, access control, protection domain, and class loader |
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962 // - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
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963 // - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
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964 |
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965 // When you load an anonymous class U, it works as if you changed its name just before loading, |
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966 // to a name that you will never use again. Since the name is lost, no other class can directly |
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967 // link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
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968 // through java.lang.Class methods like Class.newInstance. |
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969 |
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970 // Access checks for linkage sites within U continue to follow the same rules as for named classes. |
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971 // The package of an anonymous class is given by the package qualifier on the name under which it was loaded. |
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972 // An anonymous class also has special privileges to access any member of its host class. |
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973 // This is the main reason why this loading operation is unsafe. The purpose of this is to |
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974 // allow language implementations to simulate "open classes"; a host class in effect gets |
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975 // new code when an anonymous class is loaded alongside it. A less convenient but more |
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976 // standard way to do this is with reflection, which can also be set to ignore access |
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977 // restrictions. |
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978 |
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979 // Access into an anonymous class is possible only through reflection. Therefore, there |
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980 // are no special access rules for calling into an anonymous class. The relaxed access |
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981 // rule for the host class is applied in the opposite direction: A host class reflectively |
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982 // access one of its anonymous classes. |
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983 |
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984 // If you load the same bytecodes twice, you get two different classes. You can reload |
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985 // the same bytecodes with or without varying CP patches. |
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986 |
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987 // By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
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988 // The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
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989 // The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
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990 |
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991 // This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
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992 // an outer class (so that U2 is an anonymous inner class of anonymous U1). |
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993 // It is not possible for a named class, or an older anonymous class, to refer by |
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994 // name (via its CP) to a newer anonymous class. |
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995 |
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996 // CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
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997 // or type descriptors used in the loaded anonymous class. |
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998 |
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999 // Finally, CP patching may be used to introduce "live" objects into the constant pool, |
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1000 // instead of "dead" strings. A compiled statement like println((Object)"hello") can |
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1001 // be changed to println(greeting), where greeting is an arbitrary object created before |
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1002 // the anonymous class is loaded. This is useful in dynamic languages, in which |
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1003 // various kinds of metaobjects must be introduced as constants into bytecode. |
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1004 // Note the cast (Object), which tells the verifier to expect an arbitrary object, |
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1005 // not just a literal string. For such ldc instructions, the verifier uses the |
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1006 // type Object instead of String, if the loaded constant is not in fact a String. |
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1007 |
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1008 static instanceKlassHandle |
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1009 Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
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1010 jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
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1011 HeapWord* *temp_alloc, |
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1012 TRAPS) { |
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1013 |
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1014 if (UsePerfData) { |
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1015 ClassLoader::unsafe_defineClassCallCounter()->inc(); |
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1016 } |
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1017 |
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1018 if (data == NULL) { |
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1019 THROW_0(vmSymbols::java_lang_NullPointerException()); |
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1020 } |
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1021 |
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1022 jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
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1023 jint word_length = (length + sizeof(HeapWord)-1) / sizeof(HeapWord); |
6197 | 1024 HeapWord* body = NEW_C_HEAP_ARRAY(HeapWord, word_length, mtInternal); |
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1025 if (body == NULL) { |
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1026 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
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1027 } |
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1028 |
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1029 // caller responsible to free it: |
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1030 (*temp_alloc) = body; |
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1031 |
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1032 { |
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1033 jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
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1034 Copy::conjoint_words((HeapWord*) array_base, body, word_length); |
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1035 } |
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1036 |
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1037 u1* class_bytes = (u1*) body; |
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1038 int class_bytes_length = (int) length; |
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1039 if (class_bytes_length < 0) class_bytes_length = 0; |
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1040 if (class_bytes == NULL |
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1041 || host_class == NULL |
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1042 || length != class_bytes_length) |
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1043 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1044 |
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1045 objArrayHandle cp_patches_h; |
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1046 if (cp_patches_jh != NULL) { |
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1047 oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
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1048 if (!p->is_objArray()) |
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1049 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1050 cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
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1051 } |
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1052 |
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1053 KlassHandle host_klass(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(host_class))); |
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1054 const char* host_source = host_klass->external_name(); |
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1055 Handle host_loader(THREAD, host_klass->class_loader()); |
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1056 Handle host_domain(THREAD, host_klass->protection_domain()); |
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1057 |
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1058 GrowableArray<Handle>* cp_patches = NULL; |
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1059 if (cp_patches_h.not_null()) { |
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1060 int alen = cp_patches_h->length(); |
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1061 for (int i = alen-1; i >= 0; i--) { |
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1062 oop p = cp_patches_h->obj_at(i); |
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1063 if (p != NULL) { |
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1064 Handle patch(THREAD, p); |
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1065 if (cp_patches == NULL) |
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1066 cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
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1067 cp_patches->at_put(i, patch); |
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1068 } |
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1069 } |
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1070 } |
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1071 |
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1072 ClassFileStream st(class_bytes, class_bytes_length, (char*) host_source); |
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1073 |
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1074 instanceKlassHandle anon_klass; |
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1075 { |
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1076 Symbol* no_class_name = NULL; |
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1077 Klass* anonk = SystemDictionary::parse_stream(no_class_name, |
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1078 host_loader, host_domain, |
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1079 &st, host_klass, cp_patches, |
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1080 CHECK_NULL); |
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1081 if (anonk == NULL) return NULL; |
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1082 anon_klass = instanceKlassHandle(THREAD, anonk); |
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1083 } |
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1084 |
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1085 return anon_klass; |
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1086 } |
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1087 |
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1088 UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) |
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1089 { |
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1090 instanceKlassHandle anon_klass; |
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1091 jobject res_jh = NULL; |
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1092 |
431
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1093 UnsafeWrapper("Unsafe_DefineAnonymousClass"); |
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1094 ResourceMark rm(THREAD); |
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1095 |
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1096 HeapWord* temp_alloc = NULL; |
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1097 |
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1098 anon_klass = Unsafe_DefineAnonymousClass_impl(env, host_class, data, |
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1099 cp_patches_jh, |
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1100 &temp_alloc, THREAD); |
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1101 if (anon_klass() != NULL) |
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1102 res_jh = JNIHandles::make_local(env, anon_klass->java_mirror()); |
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1103 |
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1104 // try/finally clause: |
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1105 if (temp_alloc != NULL) { |
6197 | 1106 FREE_C_HEAP_ARRAY(HeapWord, temp_alloc, mtInternal); |
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1107 } |
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1108 |
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1109 // The anonymous class loader data has been artificially been kept alive to |
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1110 // this point. The mirror and any instances of this class have to keep |
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1111 // it alive afterwards. |
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1112 if (anon_klass() != NULL) { |
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1113 anon_klass->class_loader_data()->set_keep_alive(false); |
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1114 } |
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1115 |
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1116 // let caller initialize it as needed... |
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1117 |
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1118 return (jclass) res_jh; |
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1119 } |
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1120 UNSAFE_END |
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1121 |
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1122 |
0 | 1123 |
1124 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1125 UnsafeWrapper("Unsafe_MonitorEnter"); | |
1126 { | |
1127 if (jobj == NULL) { | |
1128 THROW(vmSymbols::java_lang_NullPointerException()); | |
1129 } | |
1130 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1131 ObjectSynchronizer::jni_enter(obj, CHECK); | |
1132 } | |
1133 UNSAFE_END | |
1134 | |
1135 | |
1136 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1137 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
1138 { | |
1139 if (jobj == NULL) { | |
1140 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
1141 } | |
1142 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1143 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
1144 return (res ? JNI_TRUE : JNI_FALSE); | |
1145 } | |
1146 UNSAFE_END | |
1147 | |
1148 | |
1149 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1150 UnsafeWrapper("Unsafe_MonitorExit"); | |
1151 { | |
1152 if (jobj == NULL) { | |
1153 THROW(vmSymbols::java_lang_NullPointerException()); | |
1154 } | |
1155 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
1156 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
1157 } | |
1158 UNSAFE_END | |
1159 | |
1160 | |
1161 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
1162 UnsafeWrapper("Unsafe_ThrowException"); | |
1163 { | |
1164 ThreadToNativeFromVM ttnfv(thread); | |
1165 env->Throw(thr); | |
1166 } | |
1167 UNSAFE_END | |
1168 | |
1169 // JSR166 ------------------------------------------------------------------ | |
1170 | |
1171 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
1172 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
1173 oop x = JNIHandles::resolve(x_h); | |
1174 oop e = JNIHandles::resolve(e_h); | |
1175 oop p = JNIHandles::resolve(obj); | |
113
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1176 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
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1177 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e, true); |
113
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1178 jboolean success = (res == e); |
0 | 1179 if (success) |
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1180 update_barrier_set((void*)addr, x); |
0 | 1181 return success; |
1182 UNSAFE_END | |
1183 | |
1184 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
1185 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
1186 oop p = JNIHandles::resolve(obj); | |
1187 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
1188 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
1189 UNSAFE_END | |
1190 | |
1191 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
1192 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
1193 Handle p (THREAD, JNIHandles::resolve(obj)); | |
1194 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
1195 if (VM_Version::supports_cx8()) | |
1196 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
1197 else { | |
1198 jboolean success = false; | |
1199 ObjectLocker ol(p, THREAD); | |
1200 if (*addr == e) { *addr = x; success = true; } | |
1201 return success; | |
1202 } | |
1203 UNSAFE_END | |
1204 | |
1205 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
1206 UnsafeWrapper("Unsafe_Park"); | |
4006 | 1207 #ifndef USDT2 |
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1208 HS_DTRACE_PROBE3(hotspot, thread__park__begin, thread->parker(), (int) isAbsolute, time); |
4006 | 1209 #else /* USDT2 */ |
1210 HOTSPOT_THREAD_PARK_BEGIN( | |
1211 (uintptr_t) thread->parker(), (int) isAbsolute, time); | |
1212 #endif /* USDT2 */ | |
0 | 1213 JavaThreadParkedState jtps(thread, time != 0); |
1214 thread->parker()->park(isAbsolute != 0, time); | |
4006 | 1215 #ifndef USDT2 |
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1216 HS_DTRACE_PROBE1(hotspot, thread__park__end, thread->parker()); |
4006 | 1217 #else /* USDT2 */ |
1218 HOTSPOT_THREAD_PARK_END( | |
1219 (uintptr_t) thread->parker()); | |
1220 #endif /* USDT2 */ | |
0 | 1221 UNSAFE_END |
1222 | |
1223 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
1224 UnsafeWrapper("Unsafe_Unpark"); | |
1225 Parker* p = NULL; | |
1226 if (jthread != NULL) { | |
1227 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
1228 if (java_thread != NULL) { | |
1229 jlong lp = java_lang_Thread::park_event(java_thread); | |
1230 if (lp != 0) { | |
1231 // This cast is OK even though the jlong might have been read | |
1232 // non-atomically on 32bit systems, since there, one word will | |
1233 // always be zero anyway and the value set is always the same | |
1234 p = (Parker*)addr_from_java(lp); | |
1235 } else { | |
1236 // Grab lock if apparently null or using older version of library | |
1237 MutexLocker mu(Threads_lock); | |
1238 java_thread = JNIHandles::resolve_non_null(jthread); | |
1239 if (java_thread != NULL) { | |
1240 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
1241 if (thr != NULL) { | |
1242 p = thr->parker(); | |
1243 if (p != NULL) { // Bind to Java thread for next time. | |
1244 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
1245 } | |
1246 } | |
1247 } | |
1248 } | |
1249 } | |
1250 } | |
1251 if (p != NULL) { | |
4006 | 1252 #ifndef USDT2 |
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1253 HS_DTRACE_PROBE1(hotspot, thread__unpark, p); |
4006 | 1254 #else /* USDT2 */ |
1255 HOTSPOT_THREAD_UNPARK( | |
1256 (uintptr_t) p); | |
1257 #endif /* USDT2 */ | |
0 | 1258 p->unpark(); |
1259 } | |
1260 UNSAFE_END | |
1261 | |
1262 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
1263 UnsafeWrapper("Unsafe_Loadavg"); | |
1264 const int max_nelem = 3; | |
1265 double la[max_nelem]; | |
1266 jint ret; | |
1267 | |
1268 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
1269 assert(a->is_typeArray(), "must be type array"); | |
1270 | |
1271 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
1272 ThreadToNativeFromVM ttnfv(thread); | |
1273 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
1274 return -1; | |
1275 } | |
1276 | |
1277 ret = os::loadavg(la, nelem); | |
1278 if (ret == -1) return -1; | |
1279 | |
1280 // if successful, ret is the number of samples actually retrieved. | |
1281 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
1282 switch(ret) { | |
1283 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
1284 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
1285 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
1286 } | |
1287 return ret; | |
1288 UNSAFE_END | |
1289 | |
1290 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1291 UnsafeWrapper("Unsafe_PrefetchRead"); | |
1292 oop p = JNIHandles::resolve(obj); | |
1293 void* addr = index_oop_from_field_offset_long(p, 0); | |
1294 Prefetch::read(addr, (intx)offset); | |
1295 UNSAFE_END | |
1296 | |
1297 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1298 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
1299 oop p = JNIHandles::resolve(obj); | |
1300 void* addr = index_oop_from_field_offset_long(p, 0); | |
1301 Prefetch::write(addr, (intx)offset); | |
1302 UNSAFE_END | |
1303 | |
1304 | |
1305 /// JVM_RegisterUnsafeMethods | |
1306 | |
1307 #define ADR "J" | |
1308 | |
1309 #define LANG "Ljava/lang/" | |
1310 | |
1311 #define OBJ LANG"Object;" | |
1312 #define CLS LANG"Class;" | |
1313 #define CTR LANG"reflect/Constructor;" | |
1314 #define FLD LANG"reflect/Field;" | |
1315 #define MTH LANG"reflect/Method;" | |
1316 #define THR LANG"Throwable;" | |
1317 | |
1318 #define DC0_Args LANG"String;[BII" | |
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1319 #define DC_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" |
0 | 1320 |
1321 #define CC (char*) /*cast a literal from (const char*)*/ | |
1322 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
1323 | |
1324 // define deprecated accessors for compabitility with 1.4.0 | |
1325 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
1326 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
1327 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
1328 | |
1329 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
1330 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
1331 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1332 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
1333 | |
1334 // Note: In 1.5.0, there are volatile versions too | |
1335 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
1336 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1337 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
1338 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
1339 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
1340 | |
1341 | |
1342 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
1343 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
1344 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
1345 | |
1346 | |
1347 | |
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1348 // These are the methods for 1.4.0 |
0 | 1349 static JNINativeMethod methods_140[] = { |
1350 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
1351 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
1352 | |
1353 DECLARE_GETSETOOP_140(Boolean, Z), | |
1354 DECLARE_GETSETOOP_140(Byte, B), | |
1355 DECLARE_GETSETOOP_140(Short, S), | |
1356 DECLARE_GETSETOOP_140(Char, C), | |
1357 DECLARE_GETSETOOP_140(Int, I), | |
1358 DECLARE_GETSETOOP_140(Long, J), | |
1359 DECLARE_GETSETOOP_140(Float, F), | |
1360 DECLARE_GETSETOOP_140(Double, D), | |
1361 | |
1362 DECLARE_GETSETNATIVE(Byte, B), | |
1363 DECLARE_GETSETNATIVE(Short, S), | |
1364 DECLARE_GETSETNATIVE(Char, C), | |
1365 DECLARE_GETSETNATIVE(Int, I), | |
1366 DECLARE_GETSETNATIVE(Long, J), | |
1367 DECLARE_GETSETNATIVE(Float, F), | |
1368 DECLARE_GETSETNATIVE(Double, D), | |
1369 | |
1370 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1371 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1372 | |
1373 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1374 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1375 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1376 | |
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1377 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, |
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1378 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, |
0 | 1379 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
1380 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1381 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1382 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1383 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1384 | |
1385 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1386 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1387 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1388 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1389 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1390 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1391 }; | |
1392 | |
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1393 // These are the methods prior to the JSR 166 changes in 1.5.0 |
0 | 1394 static JNINativeMethod methods_141[] = { |
1395 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1396 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1397 | |
1398 DECLARE_GETSETOOP_141(Boolean, Z), | |
1399 DECLARE_GETSETOOP_141(Byte, B), | |
1400 DECLARE_GETSETOOP_141(Short, S), | |
1401 DECLARE_GETSETOOP_141(Char, C), | |
1402 DECLARE_GETSETOOP_141(Int, I), | |
1403 DECLARE_GETSETOOP_141(Long, J), | |
1404 DECLARE_GETSETOOP_141(Float, F), | |
1405 DECLARE_GETSETOOP_141(Double, D), | |
1406 | |
1407 DECLARE_GETSETNATIVE(Byte, B), | |
1408 DECLARE_GETSETNATIVE(Short, S), | |
1409 DECLARE_GETSETNATIVE(Char, C), | |
1410 DECLARE_GETSETNATIVE(Int, I), | |
1411 DECLARE_GETSETNATIVE(Long, J), | |
1412 DECLARE_GETSETNATIVE(Float, F), | |
1413 DECLARE_GETSETNATIVE(Double, D), | |
1414 | |
1415 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1416 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1417 | |
1418 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1419 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1420 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1421 | |
1422 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1423 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1424 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1425 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1426 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1427 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1428 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1429 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1430 | |
1431 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1432 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1433 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1434 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1435 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1436 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1437 | |
1438 }; | |
1439 | |
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1440 // These are the methods prior to the JSR 166 changes in 1.6.0 |
0 | 1441 static JNINativeMethod methods_15[] = { |
1442 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1443 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1444 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1445 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1446 | |
1447 | |
1448 DECLARE_GETSETOOP(Boolean, Z), | |
1449 DECLARE_GETSETOOP(Byte, B), | |
1450 DECLARE_GETSETOOP(Short, S), | |
1451 DECLARE_GETSETOOP(Char, C), | |
1452 DECLARE_GETSETOOP(Int, I), | |
1453 DECLARE_GETSETOOP(Long, J), | |
1454 DECLARE_GETSETOOP(Float, F), | |
1455 DECLARE_GETSETOOP(Double, D), | |
1456 | |
1457 DECLARE_GETSETNATIVE(Byte, B), | |
1458 DECLARE_GETSETNATIVE(Short, S), | |
1459 DECLARE_GETSETNATIVE(Char, C), | |
1460 DECLARE_GETSETNATIVE(Int, I), | |
1461 DECLARE_GETSETNATIVE(Long, J), | |
1462 DECLARE_GETSETNATIVE(Float, F), | |
1463 DECLARE_GETSETNATIVE(Double, D), | |
1464 | |
1465 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1466 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1467 | |
1468 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1469 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1470 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1471 | |
1472 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1473 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1474 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1475 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1476 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1477 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1478 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1479 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1480 | |
1481 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1482 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1483 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1484 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1485 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1486 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1487 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1488 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1489 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1490 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1491 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1492 | |
1493 }; | |
1494 | |
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1495 // These are the methods for 1.6.0 and 1.7.0 |
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1496 static JNINativeMethod methods_16[] = { |
0 | 1497 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
1498 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1499 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1500 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1501 | |
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1502 DECLARE_GETSETOOP(Boolean, Z), |
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1503 DECLARE_GETSETOOP(Byte, B), |
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1504 DECLARE_GETSETOOP(Short, S), |
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1505 DECLARE_GETSETOOP(Char, C), |
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1506 DECLARE_GETSETOOP(Int, I), |
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1507 DECLARE_GETSETOOP(Long, J), |
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1508 DECLARE_GETSETOOP(Float, F), |
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1509 DECLARE_GETSETOOP(Double, D), |
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1510 |
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1511 DECLARE_GETSETNATIVE(Byte, B), |
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1512 DECLARE_GETSETNATIVE(Short, S), |
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1513 DECLARE_GETSETNATIVE(Char, C), |
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1514 DECLARE_GETSETNATIVE(Int, I), |
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1515 DECLARE_GETSETNATIVE(Long, J), |
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1516 DECLARE_GETSETNATIVE(Float, F), |
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1517 DECLARE_GETSETNATIVE(Double, D), |
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1518 |
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1519 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, |
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1520 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, |
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1521 |
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1522 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, |
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1523 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, |
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1524 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, |
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1525 |
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1526 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, |
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1527 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, |
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1528 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, |
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1529 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
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1530 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, |
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1531 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, |
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1532 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, |
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1533 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, |
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1534 |
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1535 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, |
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1536 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
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1537 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
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1538 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, |
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1539 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, |
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1540 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, |
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1541 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, |
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1542 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, |
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1543 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, |
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1544 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, |
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1545 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, |
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1546 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, |
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1547 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, |
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1548 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, |
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1549 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} |
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1550 }; |
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1551 |
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1552 // These are the methods for 1.8.0 |
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1553 static JNINativeMethod methods_18[] = { |
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1554 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
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1555 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, |
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1556 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, |
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1557 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, |
0 | 1558 |
1559 DECLARE_GETSETOOP(Boolean, Z), | |
1560 DECLARE_GETSETOOP(Byte, B), | |
1561 DECLARE_GETSETOOP(Short, S), | |
1562 DECLARE_GETSETOOP(Char, C), | |
1563 DECLARE_GETSETOOP(Int, I), | |
1564 DECLARE_GETSETOOP(Long, J), | |
1565 DECLARE_GETSETOOP(Float, F), | |
1566 DECLARE_GETSETOOP(Double, D), | |
1567 | |
1568 DECLARE_GETSETNATIVE(Byte, B), | |
1569 DECLARE_GETSETNATIVE(Short, S), | |
1570 DECLARE_GETSETNATIVE(Char, C), | |
1571 DECLARE_GETSETNATIVE(Int, I), | |
1572 DECLARE_GETSETNATIVE(Long, J), | |
1573 DECLARE_GETSETNATIVE(Float, F), | |
1574 DECLARE_GETSETNATIVE(Double, D), | |
1575 | |
1576 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1577 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1578 | |
1579 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1580 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1581 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1582 | |
1583 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1584 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1585 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1586 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1587 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1588 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1589 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1590 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1591 | |
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1592 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1593 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1594 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1595 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1596 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
1597 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1598 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1599 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1600 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1601 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
1602 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
1603 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
1604 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1605 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1606 }; | |
1607 | |
1608 JNINativeMethod loadavg_method[] = { | |
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1609 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} |
0 | 1610 }; |
1611 | |
1612 JNINativeMethod prefetch_methods[] = { | |
1613 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1614 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
1615 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1616 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1617 }; | |
1618 | |
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1619 JNINativeMethod memcopy_methods_17[] = { |
0 | 1620 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, |
1621 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
1622 }; | |
1623 | |
1624 JNINativeMethod memcopy_methods_15[] = { | |
1625 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1626 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
1627 }; | |
1628 | |
431
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1629 JNINativeMethod anonk_methods[] = { |
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1630 {CC"defineAnonymousClass", CC"("DAC_Args")"CLS, FN_PTR(Unsafe_DefineAnonymousClass)}, |
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1631 }; |
0 | 1632 |
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1633 JNINativeMethod lform_methods[] = { |
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1634 {CC"shouldBeInitialized",CC"("CLS")Z", FN_PTR(Unsafe_ShouldBeInitialized)}, |
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1635 }; |
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1636 |
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1637 JNINativeMethod fence_methods[] = { |
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1638 {CC"loadFence", CC"()V", FN_PTR(Unsafe_LoadFence)}, |
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1639 {CC"storeFence", CC"()V", FN_PTR(Unsafe_StoreFence)}, |
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1640 {CC"fullFence", CC"()V", FN_PTR(Unsafe_FullFence)}, |
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1641 }; |
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1642 |
0 | 1643 #undef CC |
1644 #undef FN_PTR | |
1645 | |
1646 #undef ADR | |
1647 #undef LANG | |
1648 #undef OBJ | |
1649 #undef CLS | |
1650 #undef CTR | |
1651 #undef FLD | |
1652 #undef MTH | |
1653 #undef THR | |
1654 #undef DC0_Args | |
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1655 #undef DC_Args |
0 | 1656 |
1657 #undef DECLARE_GETSETOOP | |
1658 #undef DECLARE_GETSETNATIVE | |
1659 | |
1660 | |
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1661 /** |
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1662 * Helper method to register native methods. |
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1663 */ |
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1664 static bool register_natives(const char* message, JNIEnv* env, jclass clazz, const JNINativeMethod* methods, jint nMethods) { |
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1665 int status = env->RegisterNatives(clazz, methods, nMethods); |
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1666 if (status < 0 || env->ExceptionOccurred()) { |
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1667 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1668 tty->print_cr("Unsafe: failed registering %s", message); |
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1669 } |
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1670 env->ExceptionClear(); |
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1671 return false; |
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1672 } else { |
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1673 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1674 tty->print_cr("Unsafe: successfully registered %s", message); |
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1675 } |
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1676 return true; |
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1677 } |
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1678 } |
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1679 |
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1680 |
0 | 1681 // This one function is exported, used by NativeLookup. |
1682 // The Unsafe_xxx functions above are called only from the interpreter. | |
1683 // The optimizer looks at names and signatures to recognize | |
1684 // individual functions. | |
1685 | |
1686 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
1687 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
1688 { | |
1689 ThreadToNativeFromVM ttnfv(thread); | |
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1690 |
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1691 // Unsafe methods |
0 | 1692 { |
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1693 bool success = false; |
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1694 // 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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1695 if (!success) { |
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1696 success = register_natives("1.6 methods", env, unsafecls, methods_16, sizeof(methods_16)/sizeof(JNINativeMethod)); |
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1697 } |
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1698 if (!success) { |
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1699 success = register_natives("1.8 methods", env, unsafecls, methods_18, sizeof(methods_18)/sizeof(JNINativeMethod)); |
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1700 } |
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1701 if (!success) { |
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1702 success = register_natives("1.5 methods", env, unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); |
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1703 } |
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1704 if (!success) { |
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1705 success = register_natives("1.4.1 methods", env, unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); |
0 | 1706 } |
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1707 if (!success) { |
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1708 success = register_natives("1.4.0 methods", env, unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); |
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1709 } |
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1710 guarantee(success, "register unsafe natives"); |
0 | 1711 } |
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1712 |
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1713 // Unsafe.getLoadAverage |
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1714 register_natives("1.6 loadavg method", env, unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); |
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1715 |
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1716 // Prefetch methods |
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1717 register_natives("1.6 prefetch methods", env, unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); |
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1718 |
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1719 // Memory copy methods |
0 | 1720 { |
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1721 bool success = false; |
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1722 if (!success) { |
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1723 success = register_natives("1.7 memory copy methods", env, unsafecls, memcopy_methods_17, sizeof(memcopy_methods_17)/sizeof(JNINativeMethod)); |
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1724 } |
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1725 if (!success) { |
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1726 success = register_natives("1.5 memory copy methods", env, unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); |
0 | 1727 } |
1728 } | |
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1729 |
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1730 // Unsafe.defineAnonymousClass |
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1731 if (EnableInvokeDynamic) { |
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1732 register_natives("1.7 define anonymous class method", env, unsafecls, anonk_methods, sizeof(anonk_methods)/sizeof(JNINativeMethod)); |
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1733 } |
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1734 |
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1735 // Unsafe.shouldBeInitialized |
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1736 if (EnableInvokeDynamic) { |
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1737 register_natives("1.7 LambdaForm support", env, unsafecls, lform_methods, sizeof(lform_methods)/sizeof(JNINativeMethod)); |
0 | 1738 } |
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1739 |
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1740 // Fence methods |
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1741 register_natives("1.8 fence methods", env, unsafecls, fence_methods, sizeof(fence_methods)/sizeof(JNINativeMethod)); |
0 | 1742 } |
1743 JVM_END |