Mercurial > hg > truffle
annotate src/share/vm/prims/unsafe.cpp @ 17796:3f3c97187f82
8032634: Add #ifdef PPC64 around OrderAccess operations on _thread_state.
Reviewed-by: dholmes, kvn
author | goetz |
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date | Fri, 24 Jan 2014 10:23:34 +0100 |
parents | 3514ee402842 |
children | 28f281e8de1d 62c54fcc0a35 |
rev | line source |
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0 | 1 /* |
10405 | 2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/vmSymbols.hpp" | |
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27 #include "utilities/macros.hpp" |
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28 #if INCLUDE_ALL_GCS |
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29 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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30 #endif // INCLUDE_ALL_GCS |
1972 | 31 #include "memory/allocation.inline.hpp" |
32 #include "prims/jni.h" | |
33 #include "prims/jvm.h" | |
34 #include "runtime/globals.hpp" | |
35 #include "runtime/interfaceSupport.hpp" | |
36 #include "runtime/reflection.hpp" | |
37 #include "runtime/synchronizer.hpp" | |
38 #include "services/threadService.hpp" | |
10405 | 39 #include "trace/tracing.hpp" |
1972 | 40 #include "utilities/copy.hpp" |
41 #include "utilities/dtrace.hpp" | |
42 | |
0 | 43 /* |
44 * Implementation of class sun.misc.Unsafe | |
45 */ | |
46 | |
4006 | 47 #ifndef USDT2 |
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48 HS_DTRACE_PROBE_DECL3(hotspot, thread__park__begin, uintptr_t, int, long long); |
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49 HS_DTRACE_PROBE_DECL1(hotspot, thread__park__end, uintptr_t); |
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50 HS_DTRACE_PROBE_DECL1(hotspot, thread__unpark, uintptr_t); |
4006 | 51 #endif /* !USDT2 */ |
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52 |
0 | 53 #define MAX_OBJECT_SIZE \ |
54 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ | |
55 + ((julong)max_jint * sizeof(double)) ) | |
56 | |
57 | |
58 #define UNSAFE_ENTRY(result_type, header) \ | |
59 JVM_ENTRY(result_type, header) | |
60 | |
61 // Can't use UNSAFE_LEAF because it has the signature of a straight | |
62 // call into the runtime (just like JVM_LEAF, funny that) but it's | |
63 // called like a Java Native and thus the wrapper built for it passes | |
64 // arguments like a JNI call. It expects those arguments to be popped | |
65 // from the stack on Intel like all good JNI args are, and adjusts the | |
66 // stack according. Since the JVM_LEAF call expects no extra | |
67 // arguments the stack isn't popped in the C code, is pushed by the | |
68 // wrapper and we get sick. | |
69 //#define UNSAFE_LEAF(result_type, header) \ | |
70 // JVM_LEAF(result_type, header) | |
71 | |
72 #define UNSAFE_END JVM_END | |
73 | |
74 #define UnsafeWrapper(arg) /*nothing, for the present*/ | |
75 | |
76 | |
77 inline void* addr_from_java(jlong addr) { | |
78 // This assert fails in a variety of ways on 32-bit systems. | |
79 // It is impossible to predict whether native code that converts | |
80 // pointers to longs will sign-extend or zero-extend the addresses. | |
81 //assert(addr == (uintptr_t)addr, "must not be odd high bits"); | |
82 return (void*)(uintptr_t)addr; | |
83 } | |
84 | |
85 inline jlong addr_to_java(void* p) { | |
86 assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); | |
87 return (uintptr_t)p; | |
88 } | |
89 | |
90 | |
91 // Note: The VM's obj_field and related accessors use byte-scaled | |
92 // ("unscaled") offsets, just as the unsafe methods do. | |
93 | |
94 // However, the method Unsafe.fieldOffset explicitly declines to | |
95 // guarantee this. The field offset values manipulated by the Java user | |
96 // through the Unsafe API are opaque cookies that just happen to be byte | |
97 // offsets. We represent this state of affairs by passing the cookies | |
98 // through conversion functions when going between the VM and the Unsafe API. | |
99 // The conversion functions just happen to be no-ops at present. | |
100 | |
101 inline jlong field_offset_to_byte_offset(jlong field_offset) { | |
102 return field_offset; | |
103 } | |
104 | |
105 inline jlong field_offset_from_byte_offset(jlong byte_offset) { | |
106 return byte_offset; | |
107 } | |
108 | |
109 inline jint invocation_key_from_method_slot(jint slot) { | |
110 return slot; | |
111 } | |
112 | |
113 inline jint invocation_key_to_method_slot(jint key) { | |
114 return key; | |
115 } | |
116 | |
117 inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { | |
118 jlong byte_offset = field_offset_to_byte_offset(field_offset); | |
119 #ifdef ASSERT | |
120 if (p != NULL) { | |
121 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
122 if (byte_offset == (jint)byte_offset) { | |
123 void* ptr_plus_disp = (address)p + byte_offset; | |
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124 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
0 | 125 "raw [ptr+disp] must be consistent with oop::field_base"); |
126 } | |
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127 jlong p_size = HeapWordSize * (jlong)(p->size()); |
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128 assert(byte_offset < p_size, err_msg("Unsafe access: offset " INT64_FORMAT " > object's size " INT64_FORMAT, byte_offset, p_size)); |
0 | 129 } |
130 #endif | |
131 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
132 return (address)p + (jint) byte_offset; | |
133 else | |
134 return (address)p + byte_offset; | |
135 } | |
136 | |
137 // Externally callable versions: | |
138 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
139 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
140 return field_offset; | |
141 } | |
142 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
143 return byte_offset; | |
144 } | |
145 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
146 return invocation_key_from_method_slot(slot); | |
147 } | |
148 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
149 return invocation_key_to_method_slot(key); | |
150 } | |
151 | |
152 | |
153 ///// Data in the Java heap. | |
154 | |
155 #define GET_FIELD(obj, offset, type_name, v) \ | |
156 oop p = JNIHandles::resolve(obj); \ | |
157 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
158 | |
159 #define SET_FIELD(obj, offset, type_name, x) \ | |
160 oop p = JNIHandles::resolve(obj); \ | |
161 *(type_name*)index_oop_from_field_offset_long(p, offset) = x | |
162 | |
163 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
164 oop p = JNIHandles::resolve(obj); \ | |
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165 if (support_IRIW_for_not_multiple_copy_atomic_cpu) { \ |
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166 OrderAccess::fence(); \ |
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167 } \ |
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168 volatile type_name v = OrderAccess::load_acquire((volatile type_name*)index_oop_from_field_offset_long(p, offset)); |
0 | 169 |
170 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
171 oop p = JNIHandles::resolve(obj); \ | |
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172 OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), x); |
0 | 173 |
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174 // Macros for oops that check UseCompressedOops |
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175 |
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176 #define GET_OOP_FIELD(obj, offset, v) \ |
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177 oop p = JNIHandles::resolve(obj); \ |
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178 oop v; \ |
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179 if (UseCompressedOops) { \ |
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180 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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181 v = oopDesc::decode_heap_oop(n); \ |
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182 } else { \ |
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183 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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184 } |
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185 |
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186 |
0 | 187 // Get/SetObject must be special-cased, since it works with handles. |
188 | |
189 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
190 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
191 UnsafeWrapper("Unsafe_GetObject"); | |
192 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
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193 GET_OOP_FIELD(obj, offset, v) |
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194 jobject ret = JNIHandles::make_local(env, v); |
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195 #if INCLUDE_ALL_GCS |
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196 // We could be accessing the referent field in a reference |
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197 // object. If G1 is enabled then we need to register a non-null |
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198 // referent with the SATB barrier. |
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199 if (UseG1GC) { |
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200 bool needs_barrier = false; |
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201 |
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202 if (ret != NULL) { |
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203 if (offset == java_lang_ref_Reference::referent_offset) { |
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204 oop o = JNIHandles::resolve_non_null(obj); |
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205 Klass* k = o->klass(); |
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206 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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207 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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208 needs_barrier = true; |
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209 } |
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210 } |
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211 } |
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212 |
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213 if (needs_barrier) { |
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214 oop referent = JNIHandles::resolve(ret); |
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215 G1SATBCardTableModRefBS::enqueue(referent); |
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216 } |
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217 } |
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218 #endif // INCLUDE_ALL_GCS |
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219 return ret; |
0 | 220 UNSAFE_END |
221 | |
222 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
223 UnsafeWrapper("Unsafe_SetObject"); | |
224 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
225 oop x = JNIHandles::resolve(x_h); | |
226 //SET_FIELD(obj, offset, oop, x); | |
227 oop p = JNIHandles::resolve(obj); | |
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228 if (UseCompressedOops) { |
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229 if (x != NULL) { |
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230 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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231 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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232 } else { |
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233 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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234 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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235 } |
0 | 236 } else { |
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237 if (x != NULL) { |
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238 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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239 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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240 } else { |
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241 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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242 } |
0 | 243 } |
244 UNSAFE_END | |
245 | |
246 // The normal variants allow a null base pointer with an arbitrary address. | |
247 // But if the base pointer is non-null, the offset should make some sense. | |
248 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
249 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
250 UnsafeWrapper("Unsafe_GetObject"); | |
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251 GET_OOP_FIELD(obj, offset, v) |
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252 jobject ret = JNIHandles::make_local(env, v); |
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253 #if INCLUDE_ALL_GCS |
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254 // We could be accessing the referent field in a reference |
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255 // object. If G1 is enabled then we need to register non-null |
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256 // referent with the SATB barrier. |
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257 if (UseG1GC) { |
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258 bool needs_barrier = false; |
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259 |
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260 if (ret != NULL) { |
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261 if (offset == java_lang_ref_Reference::referent_offset && obj != NULL) { |
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262 oop o = JNIHandles::resolve(obj); |
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263 Klass* k = o->klass(); |
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264 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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265 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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266 needs_barrier = true; |
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267 } |
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268 } |
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269 } |
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270 |
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271 if (needs_barrier) { |
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272 oop referent = JNIHandles::resolve(ret); |
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273 G1SATBCardTableModRefBS::enqueue(referent); |
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274 } |
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275 } |
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276 #endif // INCLUDE_ALL_GCS |
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277 return ret; |
0 | 278 UNSAFE_END |
279 | |
280 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
281 UnsafeWrapper("Unsafe_SetObject"); | |
282 oop x = JNIHandles::resolve(x_h); | |
283 oop p = JNIHandles::resolve(obj); | |
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284 if (UseCompressedOops) { |
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285 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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286 } else { |
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287 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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288 } |
0 | 289 UNSAFE_END |
290 | |
291 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
292 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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293 oop p = JNIHandles::resolve(obj); |
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294 void* addr = index_oop_from_field_offset_long(p, offset); |
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295 volatile oop v; |
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296 if (UseCompressedOops) { |
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297 volatile narrowOop n = *(volatile narrowOop*) addr; |
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298 (void)const_cast<oop&>(v = oopDesc::decode_heap_oop(n)); |
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299 } else { |
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300 (void)const_cast<oop&>(v = *(volatile oop*) addr); |
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301 } |
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302 OrderAccess::acquire(); |
0 | 303 return JNIHandles::make_local(env, v); |
304 UNSAFE_END | |
305 | |
306 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
307 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
308 oop x = JNIHandles::resolve(x_h); | |
309 oop p = JNIHandles::resolve(obj); | |
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310 void* addr = index_oop_from_field_offset_long(p, offset); |
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311 OrderAccess::release(); |
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312 if (UseCompressedOops) { |
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313 oop_store((narrowOop*)addr, x); |
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314 } else { |
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315 oop_store((oop*)addr, x); |
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316 } |
0 | 317 OrderAccess::fence(); |
318 UNSAFE_END | |
319 | |
10235 | 320 #ifndef SUPPORTS_NATIVE_CX8 |
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321 // Keep old code for platforms which may not have atomic jlong (8 bytes) instructions |
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322 |
0 | 323 // Volatile long versions must use locks if !VM_Version::supports_cx8(). |
324 // support_cx8 is a surrogate for 'supports atomic long memory ops'. | |
325 | |
326 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
327 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
328 { | |
329 if (VM_Version::supports_cx8()) { | |
330 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
331 return v; | |
332 } | |
333 else { | |
334 Handle p (THREAD, JNIHandles::resolve(obj)); | |
335 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
336 ObjectLocker ol(p, THREAD); | |
337 jlong value = *addr; | |
338 return value; | |
339 } | |
340 } | |
341 UNSAFE_END | |
342 | |
343 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
344 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
345 { | |
346 if (VM_Version::supports_cx8()) { | |
347 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
348 } | |
349 else { | |
350 Handle p (THREAD, JNIHandles::resolve(obj)); | |
351 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
352 ObjectLocker ol(p, THREAD); | |
353 *addr = x; | |
354 } | |
355 } | |
356 UNSAFE_END | |
357 | |
10235 | 358 #endif // not SUPPORTS_NATIVE_CX8 |
0 | 359 |
360 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
361 \ | |
362 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
363 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
364 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
365 GET_FIELD(obj, offset, jboolean, v); \ | |
366 return v; \ | |
367 UNSAFE_END \ | |
368 \ | |
369 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
370 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
371 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
372 SET_FIELD(obj, offset, jboolean, x); \ | |
373 UNSAFE_END \ | |
374 \ | |
375 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
376 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
377 GET_FIELD(obj, offset, jboolean, v); \ | |
378 return v; \ | |
379 UNSAFE_END \ | |
380 \ | |
381 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
382 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
383 SET_FIELD(obj, offset, jboolean, x); \ | |
384 UNSAFE_END \ | |
385 \ | |
386 // END DEFINE_GETSETOOP. | |
387 | |
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388 DEFINE_GETSETOOP(jboolean, Boolean) |
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389 DEFINE_GETSETOOP(jbyte, Byte) |
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390 DEFINE_GETSETOOP(jshort, Short); |
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391 DEFINE_GETSETOOP(jchar, Char); |
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392 DEFINE_GETSETOOP(jint, Int); |
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393 DEFINE_GETSETOOP(jlong, Long); |
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394 DEFINE_GETSETOOP(jfloat, Float); |
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395 DEFINE_GETSETOOP(jdouble, Double); |
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396 |
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397 #undef DEFINE_GETSETOOP |
0 | 398 |
399 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
400 \ | |
401 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
402 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
403 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
404 return v; \ | |
405 UNSAFE_END \ | |
406 \ | |
407 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
408 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
409 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
410 UNSAFE_END \ | |
411 \ | |
412 // END DEFINE_GETSETOOP_VOLATILE. | |
413 | |
414 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
415 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
416 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
417 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
418 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
419 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
420 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
421 | |
10235 | 422 #ifdef SUPPORTS_NATIVE_CX8 |
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423 DEFINE_GETSETOOP_VOLATILE(jlong, Long); |
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424 #endif |
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425 |
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426 #undef DEFINE_GETSETOOP_VOLATILE |
0 | 427 |
428 // The non-intrinsified versions of setOrdered just use setVolatile | |
429 | |
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430 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) |
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431 UnsafeWrapper("Unsafe_SetOrderedInt"); |
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432 SET_FIELD_VOLATILE(obj, offset, jint, x); |
0 | 433 UNSAFE_END |
434 | |
435 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
436 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
437 oop x = JNIHandles::resolve(x_h); | |
438 oop p = JNIHandles::resolve(obj); | |
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439 void* addr = index_oop_from_field_offset_long(p, offset); |
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440 OrderAccess::release(); |
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441 if (UseCompressedOops) { |
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442 oop_store((narrowOop*)addr, x); |
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443 } else { |
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444 oop_store((oop*)addr, x); |
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445 } |
0 | 446 OrderAccess::fence(); |
447 UNSAFE_END | |
448 | |
449 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
450 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
10235 | 451 #ifdef SUPPORTS_NATIVE_CX8 |
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452 SET_FIELD_VOLATILE(obj, offset, jlong, x); |
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453 #else |
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454 // Keep old code for platforms which may not have atomic long (8 bytes) instructions |
0 | 455 { |
456 if (VM_Version::supports_cx8()) { | |
457 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
458 } | |
459 else { | |
460 Handle p (THREAD, JNIHandles::resolve(obj)); | |
461 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
462 ObjectLocker ol(p, THREAD); | |
463 *addr = x; | |
464 } | |
465 } | |
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466 #endif |
0 | 467 UNSAFE_END |
468 | |
7425 | 469 UNSAFE_ENTRY(void, Unsafe_LoadFence(JNIEnv *env, jobject unsafe)) |
470 UnsafeWrapper("Unsafe_LoadFence"); | |
471 OrderAccess::acquire(); | |
472 UNSAFE_END | |
473 | |
474 UNSAFE_ENTRY(void, Unsafe_StoreFence(JNIEnv *env, jobject unsafe)) | |
475 UnsafeWrapper("Unsafe_StoreFence"); | |
476 OrderAccess::release(); | |
477 UNSAFE_END | |
478 | |
479 UNSAFE_ENTRY(void, Unsafe_FullFence(JNIEnv *env, jobject unsafe)) | |
480 UnsafeWrapper("Unsafe_FullFence"); | |
481 OrderAccess::fence(); | |
482 UNSAFE_END | |
483 | |
0 | 484 ////// Data in the C heap. |
485 | |
486 // Note: These do not throw NullPointerException for bad pointers. | |
487 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
488 // | |
489 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
490 \ | |
491 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
492 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
493 void* p = addr_from_java(addr); \ | |
494 JavaThread* t = JavaThread::current(); \ | |
495 t->set_doing_unsafe_access(true); \ | |
496 java_type x = *(volatile native_type*)p; \ | |
497 t->set_doing_unsafe_access(false); \ | |
498 return x; \ | |
499 UNSAFE_END \ | |
500 \ | |
501 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
502 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
503 JavaThread* t = JavaThread::current(); \ | |
504 t->set_doing_unsafe_access(true); \ | |
505 void* p = addr_from_java(addr); \ | |
506 *(volatile native_type*)p = x; \ | |
507 t->set_doing_unsafe_access(false); \ | |
508 UNSAFE_END \ | |
509 \ | |
510 // END DEFINE_GETSETNATIVE. | |
511 | |
512 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
513 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
514 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
515 DEFINE_GETSETNATIVE(jint, Int, jint); | |
516 // no long -- handled specially | |
517 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
518 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
519 | |
520 #undef DEFINE_GETSETNATIVE | |
521 | |
522 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
523 UnsafeWrapper("Unsafe_GetNativeLong"); | |
524 JavaThread* t = JavaThread::current(); | |
525 // We do it this way to avoid problems with access to heap using 64 | |
526 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
527 // some CPUs (SPARC) it leads to SIGBUS. | |
528 t->set_doing_unsafe_access(true); | |
529 void* p = addr_from_java(addr); | |
530 jlong x; | |
531 if (((intptr_t)p & 7) == 0) { | |
532 // jlong is aligned, do a volatile access | |
533 x = *(volatile jlong*)p; | |
534 } else { | |
535 jlong_accessor acc; | |
536 acc.words[0] = ((volatile jint*)p)[0]; | |
537 acc.words[1] = ((volatile jint*)p)[1]; | |
538 x = acc.long_value; | |
539 } | |
540 t->set_doing_unsafe_access(false); | |
541 return x; | |
542 UNSAFE_END | |
543 | |
544 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
545 UnsafeWrapper("Unsafe_SetNativeLong"); | |
546 JavaThread* t = JavaThread::current(); | |
547 // see comment for Unsafe_GetNativeLong | |
548 t->set_doing_unsafe_access(true); | |
549 void* p = addr_from_java(addr); | |
550 if (((intptr_t)p & 7) == 0) { | |
551 // jlong is aligned, do a volatile access | |
552 *(volatile jlong*)p = x; | |
553 } else { | |
554 jlong_accessor acc; | |
555 acc.long_value = x; | |
556 ((volatile jint*)p)[0] = acc.words[0]; | |
557 ((volatile jint*)p)[1] = acc.words[1]; | |
558 } | |
559 t->set_doing_unsafe_access(false); | |
560 UNSAFE_END | |
561 | |
562 | |
563 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
564 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
565 void* p = addr_from_java(addr); | |
566 return addr_to_java(*(void**)p); | |
567 UNSAFE_END | |
568 | |
569 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
570 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
571 void* p = addr_from_java(addr); | |
572 *(void**)p = addr_from_java(x); | |
573 UNSAFE_END | |
574 | |
575 | |
576 ////// Allocation requests | |
577 | |
578 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
579 UnsafeWrapper("Unsafe_AllocateInstance"); | |
580 { | |
581 ThreadToNativeFromVM ttnfv(thread); | |
582 return env->AllocObject(cls); | |
583 } | |
584 UNSAFE_END | |
585 | |
586 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
587 UnsafeWrapper("Unsafe_AllocateMemory"); | |
588 size_t sz = (size_t)size; | |
589 if (sz != (julong)size || size < 0) { | |
590 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
591 } | |
592 if (sz == 0) { | |
593 return 0; | |
594 } | |
595 sz = round_to(sz, HeapWordSize); | |
6197 | 596 void* x = os::malloc(sz, mtInternal); |
0 | 597 if (x == NULL) { |
598 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
599 } | |
600 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
601 return addr_to_java(x); | |
602 UNSAFE_END | |
603 | |
604 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
605 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
606 void* p = addr_from_java(addr); | |
607 size_t sz = (size_t)size; | |
608 if (sz != (julong)size || size < 0) { | |
609 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
610 } | |
611 if (sz == 0) { | |
612 os::free(p); | |
613 return 0; | |
614 } | |
615 sz = round_to(sz, HeapWordSize); | |
6197 | 616 void* x = (p == NULL) ? os::malloc(sz, mtInternal) : os::realloc(p, sz, mtInternal); |
0 | 617 if (x == NULL) { |
618 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
619 } | |
620 return addr_to_java(x); | |
621 UNSAFE_END | |
622 | |
623 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
624 UnsafeWrapper("Unsafe_FreeMemory"); | |
625 void* p = addr_from_java(addr); | |
626 if (p == NULL) { | |
627 return; | |
628 } | |
629 os::free(p); | |
630 UNSAFE_END | |
631 | |
632 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
633 UnsafeWrapper("Unsafe_SetMemory"); | |
634 size_t sz = (size_t)size; | |
635 if (sz != (julong)size || size < 0) { | |
636 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
637 } | |
638 char* p = (char*) addr_from_java(addr); | |
639 Copy::fill_to_memory_atomic(p, sz, value); | |
640 UNSAFE_END | |
641 | |
642 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
643 UnsafeWrapper("Unsafe_SetMemory"); | |
644 size_t sz = (size_t)size; | |
645 if (sz != (julong)size || size < 0) { | |
646 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
647 } | |
648 oop base = JNIHandles::resolve(obj); | |
649 void* p = index_oop_from_field_offset_long(base, offset); | |
650 Copy::fill_to_memory_atomic(p, sz, value); | |
651 UNSAFE_END | |
652 | |
653 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
654 UnsafeWrapper("Unsafe_CopyMemory"); | |
655 if (size == 0) { | |
656 return; | |
657 } | |
658 size_t sz = (size_t)size; | |
659 if (sz != (julong)size || size < 0) { | |
660 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
661 } | |
662 void* src = addr_from_java(srcAddr); | |
663 void* dst = addr_from_java(dstAddr); | |
664 Copy::conjoint_memory_atomic(src, dst, sz); | |
665 UNSAFE_END | |
666 | |
667 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
668 UnsafeWrapper("Unsafe_CopyMemory"); | |
669 if (size == 0) { | |
670 return; | |
671 } | |
672 size_t sz = (size_t)size; | |
673 if (sz != (julong)size || size < 0) { | |
674 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
675 } | |
676 oop srcp = JNIHandles::resolve(srcObj); | |
677 oop dstp = JNIHandles::resolve(dstObj); | |
678 if (dstp != NULL && !dstp->is_typeArray()) { | |
679 // NYI: This works only for non-oop arrays at present. | |
680 // Generalizing it would be reasonable, but requires card marking. | |
681 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
682 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
683 } | |
684 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
685 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
686 Copy::conjoint_memory_atomic(src, dst, sz); | |
687 UNSAFE_END | |
688 | |
689 | |
690 ////// Random queries | |
691 | |
692 // See comment at file start about UNSAFE_LEAF | |
693 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
694 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
695 UnsafeWrapper("Unsafe_AddressSize"); | |
696 return sizeof(void*); | |
697 UNSAFE_END | |
698 | |
699 // See comment at file start about UNSAFE_LEAF | |
700 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
701 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
702 UnsafeWrapper("Unsafe_PageSize"); | |
703 return os::vm_page_size(); | |
704 UNSAFE_END | |
705 | |
706 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
707 if (field == NULL) { | |
708 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
709 } | |
710 | |
711 oop reflected = JNIHandles::resolve_non_null(field); | |
712 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
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713 Klass* k = java_lang_Class::as_Klass(mirror); |
0 | 714 int slot = java_lang_reflect_Field::slot(reflected); |
715 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
716 | |
717 if (must_be_static >= 0) { | |
718 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
719 if (must_be_static != really_is_static) { | |
720 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
721 } | |
722 } | |
723 | |
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724 int offset = InstanceKlass::cast(k)->field_offset(slot); |
0 | 725 return field_offset_from_byte_offset(offset); |
726 } | |
727 | |
728 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
729 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
730 return find_field_offset(field, 0, THREAD); | |
731 UNSAFE_END | |
732 | |
733 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
734 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
735 return find_field_offset(field, 1, THREAD); | |
736 UNSAFE_END | |
737 | |
738 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
739 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
740 // Note: In this VM implementation, a field address is always a short | |
741 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
742 // range of the return type is never used. However, some implementations | |
743 // might put the static field inside an array shared by many classes, | |
744 // or even at a fixed address, in which case the address could be quite | |
745 // large. In that last case, this function would return NULL, since | |
746 // the address would operate alone, without any base pointer. | |
747 | |
748 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
749 | |
750 oop reflected = JNIHandles::resolve_non_null(field); | |
751 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
752 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
753 | |
754 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
755 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
756 } | |
757 | |
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758 return JNIHandles::make_local(env, mirror); |
0 | 759 UNSAFE_END |
760 | |
761 //@deprecated | |
762 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
763 UnsafeWrapper("Unsafe_FieldOffset"); | |
764 // tries (but fails) to be polymorphic between static and non-static: | |
765 jlong offset = find_field_offset(field, -1, THREAD); | |
766 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
767 return (jint)offset; | |
768 UNSAFE_END | |
769 | |
770 //@deprecated | |
771 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
772 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
773 if (clazz == NULL) { | |
774 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
775 } | |
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776 return JNIHandles::make_local(env, JNIHandles::resolve_non_null(clazz)); |
0 | 777 UNSAFE_END |
778 | |
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779 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
0 | 780 UnsafeWrapper("Unsafe_EnsureClassInitialized"); |
781 if (clazz == NULL) { | |
782 THROW(vmSymbols::java_lang_NullPointerException()); | |
783 } | |
784 oop mirror = JNIHandles::resolve_non_null(clazz); | |
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785 |
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786 Klass* klass = java_lang_Class::as_Klass(mirror); |
6983 | 787 if (klass != NULL && klass->should_be_initialized()) { |
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788 InstanceKlass* k = InstanceKlass::cast(klass); |
0 | 789 k->initialize(CHECK); |
790 } | |
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791 } |
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792 UNSAFE_END |
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793 |
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794 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
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795 UnsafeWrapper("Unsafe_ShouldBeInitialized"); |
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796 if (clazz == NULL) { |
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797 THROW_(vmSymbols::java_lang_NullPointerException(), false); |
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798 } |
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799 oop mirror = JNIHandles::resolve_non_null(clazz); |
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800 Klass* klass = java_lang_Class::as_Klass(mirror); |
6983 | 801 if (klass != NULL && klass->should_be_initialized()) { |
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802 return true; |
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803 } |
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804 return false; |
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805 } |
0 | 806 UNSAFE_END |
807 | |
808 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
809 if (acls == NULL) { | |
810 THROW(vmSymbols::java_lang_NullPointerException()); | |
811 } | |
812 oop mirror = JNIHandles::resolve_non_null(acls); | |
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813 Klass* k = java_lang_Class::as_Klass(mirror); |
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814 if (k == NULL || !k->oop_is_array()) { |
0 | 815 THROW(vmSymbols::java_lang_InvalidClassException()); |
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816 } else if (k->oop_is_objArray()) { |
0 | 817 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); |
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818 scale = heapOopSize; |
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819 } else if (k->oop_is_typeArray()) { |
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820 TypeArrayKlass* tak = TypeArrayKlass::cast(k); |
0 | 821 base = tak->array_header_in_bytes(); |
822 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
823 scale = (1 << tak->log2_element_size()); | |
824 } else { | |
825 ShouldNotReachHere(); | |
826 } | |
827 } | |
828 | |
829 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
830 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
831 int base, scale; | |
832 getBaseAndScale(base, scale, acls, CHECK_0); | |
833 return field_offset_from_byte_offset(base); | |
834 UNSAFE_END | |
835 | |
836 | |
837 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
838 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
839 int base, scale; | |
840 getBaseAndScale(base, scale, acls, CHECK_0); | |
841 // This VM packs both fields and array elements down to the byte. | |
842 // But watch out: If this changes, so that array references for | |
843 // a given primitive type (say, T_BOOLEAN) use different memory units | |
844 // than fields, this method MUST return zero for such arrays. | |
845 // For example, the VM used to store sub-word sized fields in full | |
846 // words in the object layout, so that accessors like getByte(Object,int) | |
847 // did not really do what one might expect for arrays. Therefore, | |
848 // this function used to report a zero scale factor, so that the user | |
849 // would know not to attempt to access sub-word array elements. | |
850 // // Code for unpacked fields: | |
851 // if (scale < wordSize) return 0; | |
852 | |
853 // The following allows for a pretty general fieldOffset cookie scheme, | |
854 // but requires it to be linear in byte offset. | |
855 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
856 UNSAFE_END | |
857 | |
858 | |
859 static inline void throw_new(JNIEnv *env, const char *ename) { | |
860 char buf[100]; | |
861 strcpy(buf, "java/lang/"); | |
862 strcat(buf, ename); | |
863 jclass cls = env->FindClass(buf); | |
864 char* msg = NULL; | |
865 env->ThrowNew(cls, msg); | |
866 } | |
867 | |
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868 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { |
0 | 869 { |
870 // Code lifted from JDK 1.3 ClassLoader.c | |
871 | |
872 jbyte *body; | |
873 char *utfName; | |
874 jclass result = 0; | |
875 char buf[128]; | |
876 | |
877 if (UsePerfData) { | |
878 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
879 } | |
880 | |
881 if (data == NULL) { | |
882 throw_new(env, "NullPointerException"); | |
883 return 0; | |
884 } | |
885 | |
886 /* Work around 4153825. malloc crashes on Solaris when passed a | |
887 * negative size. | |
888 */ | |
889 if (length < 0) { | |
890 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
891 return 0; | |
892 } | |
893 | |
6197 | 894 body = NEW_C_HEAP_ARRAY(jbyte, length, mtInternal); |
0 | 895 |
896 if (body == 0) { | |
897 throw_new(env, "OutOfMemoryError"); | |
898 return 0; | |
899 } | |
900 | |
901 env->GetByteArrayRegion(data, offset, length, body); | |
902 | |
903 if (env->ExceptionOccurred()) | |
904 goto free_body; | |
905 | |
906 if (name != NULL) { | |
907 uint len = env->GetStringUTFLength(name); | |
908 int unicode_len = env->GetStringLength(name); | |
909 if (len >= sizeof(buf)) { | |
6197 | 910 utfName = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); |
0 | 911 if (utfName == NULL) { |
912 throw_new(env, "OutOfMemoryError"); | |
913 goto free_body; | |
914 } | |
915 } else { | |
916 utfName = buf; | |
917 } | |
918 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
919 //VerifyFixClassname(utfName); | |
920 for (uint i = 0; i < len; i++) { | |
921 if (utfName[i] == '.') utfName[i] = '/'; | |
922 } | |
923 } else { | |
924 utfName = NULL; | |
925 } | |
926 | |
927 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
928 | |
929 if (utfName && utfName != buf) | |
6197 | 930 FREE_C_HEAP_ARRAY(char, utfName, mtInternal); |
0 | 931 |
932 free_body: | |
6197 | 933 FREE_C_HEAP_ARRAY(jbyte, body, mtInternal); |
0 | 934 return result; |
935 } | |
936 } | |
937 | |
938 | |
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939 UNSAFE_ENTRY(jclass, Unsafe_DefineClass(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd)) |
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940 UnsafeWrapper("Unsafe_DefineClass"); |
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941 { |
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942 ThreadToNativeFromVM ttnfv(thread); |
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943 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
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944 } |
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945 UNSAFE_END |
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946 |
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947 |
0 | 948 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) |
949 UnsafeWrapper("Unsafe_DefineClass"); | |
950 { | |
951 ThreadToNativeFromVM ttnfv(thread); | |
952 | |
953 int depthFromDefineClass0 = 1; | |
954 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
955 jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller); | |
956 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); | |
957 | |
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958 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
0 | 959 } |
960 UNSAFE_END | |
961 | |
962 | |
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963 #define DAC_Args CLS"[B["OBJ |
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964 // define a class but do not make it known to the class loader or system dictionary |
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965 // - host_class: supplies context for linkage, access control, protection domain, and class loader |
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966 // - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
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967 // - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
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968 |
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969 // When you load an anonymous class U, it works as if you changed its name just before loading, |
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970 // to a name that you will never use again. Since the name is lost, no other class can directly |
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971 // link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
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972 // through java.lang.Class methods like Class.newInstance. |
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973 |
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974 // Access checks for linkage sites within U continue to follow the same rules as for named classes. |
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975 // The package of an anonymous class is given by the package qualifier on the name under which it was loaded. |
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976 // An anonymous class also has special privileges to access any member of its host class. |
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977 // This is the main reason why this loading operation is unsafe. The purpose of this is to |
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978 // allow language implementations to simulate "open classes"; a host class in effect gets |
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979 // new code when an anonymous class is loaded alongside it. A less convenient but more |
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980 // standard way to do this is with reflection, which can also be set to ignore access |
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981 // restrictions. |
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982 |
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983 // Access into an anonymous class is possible only through reflection. Therefore, there |
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984 // are no special access rules for calling into an anonymous class. The relaxed access |
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985 // rule for the host class is applied in the opposite direction: A host class reflectively |
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986 // access one of its anonymous classes. |
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987 |
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988 // If you load the same bytecodes twice, you get two different classes. You can reload |
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989 // the same bytecodes with or without varying CP patches. |
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990 |
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991 // By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
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992 // The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
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993 // The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
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994 |
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995 // This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
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996 // an outer class (so that U2 is an anonymous inner class of anonymous U1). |
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997 // It is not possible for a named class, or an older anonymous class, to refer by |
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998 // name (via its CP) to a newer anonymous class. |
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999 |
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1000 // CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
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1001 // or type descriptors used in the loaded anonymous class. |
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1002 |
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1003 // Finally, CP patching may be used to introduce "live" objects into the constant pool, |
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1004 // instead of "dead" strings. A compiled statement like println((Object)"hello") can |
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1005 // be changed to println(greeting), where greeting is an arbitrary object created before |
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1006 // the anonymous class is loaded. This is useful in dynamic languages, in which |
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1007 // various kinds of metaobjects must be introduced as constants into bytecode. |
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1008 // Note the cast (Object), which tells the verifier to expect an arbitrary object, |
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1009 // not just a literal string. For such ldc instructions, the verifier uses the |
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1010 // type Object instead of String, if the loaded constant is not in fact a String. |
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1011 |
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1012 static instanceKlassHandle |
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1013 Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
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1014 jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
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1015 HeapWord* *temp_alloc, |
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1016 TRAPS) { |
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1017 |
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1018 if (UsePerfData) { |
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1019 ClassLoader::unsafe_defineClassCallCounter()->inc(); |
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1020 } |
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1021 |
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1022 if (data == NULL) { |
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1023 THROW_0(vmSymbols::java_lang_NullPointerException()); |
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1024 } |
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1025 |
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1026 jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
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1027 jint word_length = (length + sizeof(HeapWord)-1) / sizeof(HeapWord); |
6197 | 1028 HeapWord* body = NEW_C_HEAP_ARRAY(HeapWord, word_length, mtInternal); |
431
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1029 if (body == NULL) { |
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1030 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
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1031 } |
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1032 |
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1033 // caller responsible to free it: |
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1034 (*temp_alloc) = body; |
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1035 |
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1036 { |
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1037 jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
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1038 Copy::conjoint_words((HeapWord*) array_base, body, word_length); |
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1039 } |
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1040 |
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1041 u1* class_bytes = (u1*) body; |
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1042 int class_bytes_length = (int) length; |
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1043 if (class_bytes_length < 0) class_bytes_length = 0; |
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1044 if (class_bytes == NULL |
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1045 || host_class == NULL |
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1046 || length != class_bytes_length) |
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1047 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1048 |
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1049 objArrayHandle cp_patches_h; |
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1050 if (cp_patches_jh != NULL) { |
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1051 oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
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1052 if (!p->is_objArray()) |
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1053 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1054 cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
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1055 } |
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1056 |
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1057 KlassHandle host_klass(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(host_class))); |
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1058 const char* host_source = host_klass->external_name(); |
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1059 Handle host_loader(THREAD, host_klass->class_loader()); |
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1060 Handle host_domain(THREAD, host_klass->protection_domain()); |
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1061 |
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1062 GrowableArray<Handle>* cp_patches = NULL; |
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1063 if (cp_patches_h.not_null()) { |
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1064 int alen = cp_patches_h->length(); |
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1065 for (int i = alen-1; i >= 0; i--) { |
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1066 oop p = cp_patches_h->obj_at(i); |
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1067 if (p != NULL) { |
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1068 Handle patch(THREAD, p); |
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1069 if (cp_patches == NULL) |
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1070 cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
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1071 cp_patches->at_put(i, patch); |
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1072 } |
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1073 } |
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1074 } |
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1075 |
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1076 ClassFileStream st(class_bytes, class_bytes_length, (char*) host_source); |
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1077 |
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1078 instanceKlassHandle anon_klass; |
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1079 { |
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1080 Symbol* no_class_name = NULL; |
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1081 Klass* anonk = SystemDictionary::parse_stream(no_class_name, |
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1082 host_loader, host_domain, |
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1083 &st, host_klass, cp_patches, |
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1084 CHECK_NULL); |
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1085 if (anonk == NULL) return NULL; |
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1086 anon_klass = instanceKlassHandle(THREAD, anonk); |
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1087 } |
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1088 |
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1089 return anon_klass; |
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1090 } |
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1091 |
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1092 UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) |
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1093 { |
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1094 instanceKlassHandle anon_klass; |
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1095 jobject res_jh = NULL; |
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1096 |
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1097 UnsafeWrapper("Unsafe_DefineAnonymousClass"); |
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1098 ResourceMark rm(THREAD); |
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1099 |
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1100 HeapWord* temp_alloc = NULL; |
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1101 |
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1102 anon_klass = Unsafe_DefineAnonymousClass_impl(env, host_class, data, |
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1103 cp_patches_jh, |
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1104 &temp_alloc, THREAD); |
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1105 if (anon_klass() != NULL) |
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1106 res_jh = JNIHandles::make_local(env, anon_klass->java_mirror()); |
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1107 |
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1108 // try/finally clause: |
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1109 if (temp_alloc != NULL) { |
6197 | 1110 FREE_C_HEAP_ARRAY(HeapWord, temp_alloc, mtInternal); |
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1111 } |
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1112 |
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1113 // The anonymous class loader data has been artificially been kept alive to |
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1114 // this point. The mirror and any instances of this class have to keep |
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1115 // it alive afterwards. |
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1116 if (anon_klass() != NULL) { |
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1117 anon_klass->class_loader_data()->set_keep_alive(false); |
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1118 } |
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1119 |
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1120 // let caller initialize it as needed... |
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1121 |
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1122 return (jclass) res_jh; |
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1123 } |
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1124 UNSAFE_END |
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1125 |
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1126 |
0 | 1127 |
1128 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1129 UnsafeWrapper("Unsafe_MonitorEnter"); | |
1130 { | |
1131 if (jobj == NULL) { | |
1132 THROW(vmSymbols::java_lang_NullPointerException()); | |
1133 } | |
1134 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1135 ObjectSynchronizer::jni_enter(obj, CHECK); | |
1136 } | |
1137 UNSAFE_END | |
1138 | |
1139 | |
1140 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1141 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
1142 { | |
1143 if (jobj == NULL) { | |
1144 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
1145 } | |
1146 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1147 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
1148 return (res ? JNI_TRUE : JNI_FALSE); | |
1149 } | |
1150 UNSAFE_END | |
1151 | |
1152 | |
1153 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1154 UnsafeWrapper("Unsafe_MonitorExit"); | |
1155 { | |
1156 if (jobj == NULL) { | |
1157 THROW(vmSymbols::java_lang_NullPointerException()); | |
1158 } | |
1159 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
1160 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
1161 } | |
1162 UNSAFE_END | |
1163 | |
1164 | |
1165 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
1166 UnsafeWrapper("Unsafe_ThrowException"); | |
1167 { | |
1168 ThreadToNativeFromVM ttnfv(thread); | |
1169 env->Throw(thr); | |
1170 } | |
1171 UNSAFE_END | |
1172 | |
1173 // JSR166 ------------------------------------------------------------------ | |
1174 | |
1175 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
1176 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
1177 oop x = JNIHandles::resolve(x_h); | |
1178 oop e = JNIHandles::resolve(e_h); | |
1179 oop p = JNIHandles::resolve(obj); | |
113
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1180 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
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1181 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e, true); |
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1182 jboolean success = (res == e); |
0 | 1183 if (success) |
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1184 update_barrier_set((void*)addr, x); |
0 | 1185 return success; |
1186 UNSAFE_END | |
1187 | |
1188 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
1189 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
1190 oop p = JNIHandles::resolve(obj); | |
1191 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
1192 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
1193 UNSAFE_END | |
1194 | |
1195 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
1196 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
1197 Handle p (THREAD, JNIHandles::resolve(obj)); | |
1198 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
1199 if (VM_Version::supports_cx8()) | |
1200 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
1201 else { | |
1202 jboolean success = false; | |
1203 ObjectLocker ol(p, THREAD); | |
1204 if (*addr == e) { *addr = x; success = true; } | |
1205 return success; | |
1206 } | |
1207 UNSAFE_END | |
1208 | |
1209 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
1210 UnsafeWrapper("Unsafe_Park"); | |
10405 | 1211 EventThreadPark event; |
4006 | 1212 #ifndef USDT2 |
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1213 HS_DTRACE_PROBE3(hotspot, thread__park__begin, thread->parker(), (int) isAbsolute, time); |
4006 | 1214 #else /* USDT2 */ |
1215 HOTSPOT_THREAD_PARK_BEGIN( | |
1216 (uintptr_t) thread->parker(), (int) isAbsolute, time); | |
1217 #endif /* USDT2 */ | |
0 | 1218 JavaThreadParkedState jtps(thread, time != 0); |
1219 thread->parker()->park(isAbsolute != 0, time); | |
4006 | 1220 #ifndef USDT2 |
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1221 HS_DTRACE_PROBE1(hotspot, thread__park__end, thread->parker()); |
4006 | 1222 #else /* USDT2 */ |
1223 HOTSPOT_THREAD_PARK_END( | |
1224 (uintptr_t) thread->parker()); | |
1225 #endif /* USDT2 */ | |
10405 | 1226 if (event.should_commit()) { |
1227 oop obj = thread->current_park_blocker(); | |
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1228 event.set_klass((obj != NULL) ? obj->klass() : NULL); |
10405 | 1229 event.set_timeout(time); |
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1230 event.set_address((obj != NULL) ? (TYPE_ADDRESS) cast_from_oop<uintptr_t>(obj) : 0); |
10405 | 1231 event.commit(); |
1232 } | |
0 | 1233 UNSAFE_END |
1234 | |
1235 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
1236 UnsafeWrapper("Unsafe_Unpark"); | |
1237 Parker* p = NULL; | |
1238 if (jthread != NULL) { | |
1239 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
1240 if (java_thread != NULL) { | |
1241 jlong lp = java_lang_Thread::park_event(java_thread); | |
1242 if (lp != 0) { | |
1243 // This cast is OK even though the jlong might have been read | |
1244 // non-atomically on 32bit systems, since there, one word will | |
1245 // always be zero anyway and the value set is always the same | |
1246 p = (Parker*)addr_from_java(lp); | |
1247 } else { | |
1248 // Grab lock if apparently null or using older version of library | |
1249 MutexLocker mu(Threads_lock); | |
1250 java_thread = JNIHandles::resolve_non_null(jthread); | |
1251 if (java_thread != NULL) { | |
1252 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
1253 if (thr != NULL) { | |
1254 p = thr->parker(); | |
1255 if (p != NULL) { // Bind to Java thread for next time. | |
1256 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
1257 } | |
1258 } | |
1259 } | |
1260 } | |
1261 } | |
1262 } | |
1263 if (p != NULL) { | |
4006 | 1264 #ifndef USDT2 |
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1265 HS_DTRACE_PROBE1(hotspot, thread__unpark, p); |
4006 | 1266 #else /* USDT2 */ |
1267 HOTSPOT_THREAD_UNPARK( | |
1268 (uintptr_t) p); | |
1269 #endif /* USDT2 */ | |
0 | 1270 p->unpark(); |
1271 } | |
1272 UNSAFE_END | |
1273 | |
1274 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
1275 UnsafeWrapper("Unsafe_Loadavg"); | |
1276 const int max_nelem = 3; | |
1277 double la[max_nelem]; | |
1278 jint ret; | |
1279 | |
1280 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
1281 assert(a->is_typeArray(), "must be type array"); | |
1282 | |
1283 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
1284 ThreadToNativeFromVM ttnfv(thread); | |
1285 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
1286 return -1; | |
1287 } | |
1288 | |
1289 ret = os::loadavg(la, nelem); | |
1290 if (ret == -1) return -1; | |
1291 | |
1292 // if successful, ret is the number of samples actually retrieved. | |
1293 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
1294 switch(ret) { | |
1295 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
1296 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
1297 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
1298 } | |
1299 return ret; | |
1300 UNSAFE_END | |
1301 | |
1302 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1303 UnsafeWrapper("Unsafe_PrefetchRead"); | |
1304 oop p = JNIHandles::resolve(obj); | |
1305 void* addr = index_oop_from_field_offset_long(p, 0); | |
1306 Prefetch::read(addr, (intx)offset); | |
1307 UNSAFE_END | |
1308 | |
1309 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1310 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
1311 oop p = JNIHandles::resolve(obj); | |
1312 void* addr = index_oop_from_field_offset_long(p, 0); | |
1313 Prefetch::write(addr, (intx)offset); | |
1314 UNSAFE_END | |
1315 | |
1316 | |
1317 /// JVM_RegisterUnsafeMethods | |
1318 | |
1319 #define ADR "J" | |
1320 | |
1321 #define LANG "Ljava/lang/" | |
1322 | |
1323 #define OBJ LANG"Object;" | |
1324 #define CLS LANG"Class;" | |
1325 #define CTR LANG"reflect/Constructor;" | |
1326 #define FLD LANG"reflect/Field;" | |
1327 #define MTH LANG"reflect/Method;" | |
1328 #define THR LANG"Throwable;" | |
1329 | |
1330 #define DC0_Args LANG"String;[BII" | |
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1331 #define DC_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" |
0 | 1332 |
1333 #define CC (char*) /*cast a literal from (const char*)*/ | |
1334 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
1335 | |
1336 // define deprecated accessors for compabitility with 1.4.0 | |
1337 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
1338 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
1339 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
1340 | |
1341 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
1342 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
1343 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1344 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
1345 | |
1346 // Note: In 1.5.0, there are volatile versions too | |
1347 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
1348 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1349 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
1350 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
1351 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
1352 | |
1353 | |
1354 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
1355 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
1356 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
1357 | |
1358 | |
1359 | |
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1360 // These are the methods for 1.4.0 |
0 | 1361 static JNINativeMethod methods_140[] = { |
1362 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
1363 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
1364 | |
1365 DECLARE_GETSETOOP_140(Boolean, Z), | |
1366 DECLARE_GETSETOOP_140(Byte, B), | |
1367 DECLARE_GETSETOOP_140(Short, S), | |
1368 DECLARE_GETSETOOP_140(Char, C), | |
1369 DECLARE_GETSETOOP_140(Int, I), | |
1370 DECLARE_GETSETOOP_140(Long, J), | |
1371 DECLARE_GETSETOOP_140(Float, F), | |
1372 DECLARE_GETSETOOP_140(Double, D), | |
1373 | |
1374 DECLARE_GETSETNATIVE(Byte, B), | |
1375 DECLARE_GETSETNATIVE(Short, S), | |
1376 DECLARE_GETSETNATIVE(Char, C), | |
1377 DECLARE_GETSETNATIVE(Int, I), | |
1378 DECLARE_GETSETNATIVE(Long, J), | |
1379 DECLARE_GETSETNATIVE(Float, F), | |
1380 DECLARE_GETSETNATIVE(Double, D), | |
1381 | |
1382 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1383 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1384 | |
1385 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1386 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1387 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1388 | |
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1389 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, |
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1390 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, |
0 | 1391 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
1392 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1393 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1394 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1395 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1396 | |
1397 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1398 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1399 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1400 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1401 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1402 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1403 }; | |
1404 | |
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1405 // These are the methods prior to the JSR 166 changes in 1.5.0 |
0 | 1406 static JNINativeMethod methods_141[] = { |
1407 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1408 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1409 | |
1410 DECLARE_GETSETOOP_141(Boolean, Z), | |
1411 DECLARE_GETSETOOP_141(Byte, B), | |
1412 DECLARE_GETSETOOP_141(Short, S), | |
1413 DECLARE_GETSETOOP_141(Char, C), | |
1414 DECLARE_GETSETOOP_141(Int, I), | |
1415 DECLARE_GETSETOOP_141(Long, J), | |
1416 DECLARE_GETSETOOP_141(Float, F), | |
1417 DECLARE_GETSETOOP_141(Double, D), | |
1418 | |
1419 DECLARE_GETSETNATIVE(Byte, B), | |
1420 DECLARE_GETSETNATIVE(Short, S), | |
1421 DECLARE_GETSETNATIVE(Char, C), | |
1422 DECLARE_GETSETNATIVE(Int, I), | |
1423 DECLARE_GETSETNATIVE(Long, J), | |
1424 DECLARE_GETSETNATIVE(Float, F), | |
1425 DECLARE_GETSETNATIVE(Double, D), | |
1426 | |
1427 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1428 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1429 | |
1430 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1431 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1432 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1433 | |
1434 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1435 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1436 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1437 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1438 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1439 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1440 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1441 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1442 | |
1443 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1444 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1445 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1446 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1447 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1448 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1449 | |
1450 }; | |
1451 | |
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1452 // These are the methods prior to the JSR 166 changes in 1.6.0 |
0 | 1453 static JNINativeMethod methods_15[] = { |
1454 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1455 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1456 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1457 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1458 | |
1459 | |
1460 DECLARE_GETSETOOP(Boolean, Z), | |
1461 DECLARE_GETSETOOP(Byte, B), | |
1462 DECLARE_GETSETOOP(Short, S), | |
1463 DECLARE_GETSETOOP(Char, C), | |
1464 DECLARE_GETSETOOP(Int, I), | |
1465 DECLARE_GETSETOOP(Long, J), | |
1466 DECLARE_GETSETOOP(Float, F), | |
1467 DECLARE_GETSETOOP(Double, D), | |
1468 | |
1469 DECLARE_GETSETNATIVE(Byte, B), | |
1470 DECLARE_GETSETNATIVE(Short, S), | |
1471 DECLARE_GETSETNATIVE(Char, C), | |
1472 DECLARE_GETSETNATIVE(Int, I), | |
1473 DECLARE_GETSETNATIVE(Long, J), | |
1474 DECLARE_GETSETNATIVE(Float, F), | |
1475 DECLARE_GETSETNATIVE(Double, D), | |
1476 | |
1477 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1478 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1479 | |
1480 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1481 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1482 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1483 | |
1484 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1485 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1486 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1487 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1488 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1489 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1490 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1491 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1492 | |
1493 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1494 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1495 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1496 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1497 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1498 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1499 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1500 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1501 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1502 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1503 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1504 | |
1505 }; | |
1506 | |
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1507 // These are the methods for 1.6.0 and 1.7.0 |
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1508 static JNINativeMethod methods_16[] = { |
0 | 1509 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
1510 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1511 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1512 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1513 | |
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1514 DECLARE_GETSETOOP(Boolean, Z), |
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1515 DECLARE_GETSETOOP(Byte, B), |
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1516 DECLARE_GETSETOOP(Short, S), |
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1517 DECLARE_GETSETOOP(Char, C), |
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1518 DECLARE_GETSETOOP(Int, I), |
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1519 DECLARE_GETSETOOP(Long, J), |
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1520 DECLARE_GETSETOOP(Float, F), |
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1521 DECLARE_GETSETOOP(Double, D), |
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1522 |
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1523 DECLARE_GETSETNATIVE(Byte, B), |
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1524 DECLARE_GETSETNATIVE(Short, S), |
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1525 DECLARE_GETSETNATIVE(Char, C), |
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1526 DECLARE_GETSETNATIVE(Int, I), |
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1527 DECLARE_GETSETNATIVE(Long, J), |
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1528 DECLARE_GETSETNATIVE(Float, F), |
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1529 DECLARE_GETSETNATIVE(Double, D), |
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1530 |
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1531 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, |
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1532 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, |
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1533 |
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1534 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, |
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1535 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, |
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1536 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, |
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1537 |
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1538 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, |
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1539 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, |
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1540 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, |
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1541 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
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1542 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, |
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1543 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, |
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1544 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, |
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1545 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, |
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1546 |
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1547 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, |
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1548 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
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1549 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
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1550 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, |
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1551 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, |
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1552 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, |
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1553 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, |
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1554 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, |
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1555 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, |
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1556 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, |
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1557 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, |
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1558 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, |
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1559 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, |
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1560 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, |
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1561 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} |
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1562 }; |
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1563 |
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1564 // These are the methods for 1.8.0 |
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1565 static JNINativeMethod methods_18[] = { |
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1566 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
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1567 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, |
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1568 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, |
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1569 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, |
0 | 1570 |
1571 DECLARE_GETSETOOP(Boolean, Z), | |
1572 DECLARE_GETSETOOP(Byte, B), | |
1573 DECLARE_GETSETOOP(Short, S), | |
1574 DECLARE_GETSETOOP(Char, C), | |
1575 DECLARE_GETSETOOP(Int, I), | |
1576 DECLARE_GETSETOOP(Long, J), | |
1577 DECLARE_GETSETOOP(Float, F), | |
1578 DECLARE_GETSETOOP(Double, D), | |
1579 | |
1580 DECLARE_GETSETNATIVE(Byte, B), | |
1581 DECLARE_GETSETNATIVE(Short, S), | |
1582 DECLARE_GETSETNATIVE(Char, C), | |
1583 DECLARE_GETSETNATIVE(Int, I), | |
1584 DECLARE_GETSETNATIVE(Long, J), | |
1585 DECLARE_GETSETNATIVE(Float, F), | |
1586 DECLARE_GETSETNATIVE(Double, D), | |
1587 | |
1588 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1589 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1590 | |
1591 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1592 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1593 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1594 | |
1595 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1596 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1597 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1598 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1599 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1600 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1601 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1602 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1603 | |
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1604 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1605 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1606 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1607 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1608 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
1609 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1610 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1611 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1612 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1613 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
1614 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
1615 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
1616 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1617 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1618 }; | |
1619 | |
1620 JNINativeMethod loadavg_method[] = { | |
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1621 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} |
0 | 1622 }; |
1623 | |
1624 JNINativeMethod prefetch_methods[] = { | |
1625 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1626 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
1627 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1628 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1629 }; | |
1630 | |
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1631 JNINativeMethod memcopy_methods_17[] = { |
0 | 1632 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, |
1633 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
1634 }; | |
1635 | |
1636 JNINativeMethod memcopy_methods_15[] = { | |
1637 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1638 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
1639 }; | |
1640 | |
431
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1641 JNINativeMethod anonk_methods[] = { |
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1642 {CC"defineAnonymousClass", CC"("DAC_Args")"CLS, FN_PTR(Unsafe_DefineAnonymousClass)}, |
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1643 }; |
0 | 1644 |
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1645 JNINativeMethod lform_methods[] = { |
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1646 {CC"shouldBeInitialized",CC"("CLS")Z", FN_PTR(Unsafe_ShouldBeInitialized)}, |
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1647 }; |
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1648 |
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1649 JNINativeMethod fence_methods[] = { |
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1650 {CC"loadFence", CC"()V", FN_PTR(Unsafe_LoadFence)}, |
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1651 {CC"storeFence", CC"()V", FN_PTR(Unsafe_StoreFence)}, |
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1652 {CC"fullFence", CC"()V", FN_PTR(Unsafe_FullFence)}, |
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1653 }; |
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1654 |
0 | 1655 #undef CC |
1656 #undef FN_PTR | |
1657 | |
1658 #undef ADR | |
1659 #undef LANG | |
1660 #undef OBJ | |
1661 #undef CLS | |
1662 #undef CTR | |
1663 #undef FLD | |
1664 #undef MTH | |
1665 #undef THR | |
1666 #undef DC0_Args | |
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1667 #undef DC_Args |
0 | 1668 |
1669 #undef DECLARE_GETSETOOP | |
1670 #undef DECLARE_GETSETNATIVE | |
1671 | |
1672 | |
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1673 /** |
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1674 * Helper method to register native methods. |
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1675 */ |
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1676 static bool register_natives(const char* message, JNIEnv* env, jclass clazz, const JNINativeMethod* methods, jint nMethods) { |
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1677 int status = env->RegisterNatives(clazz, methods, nMethods); |
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1678 if (status < 0 || env->ExceptionOccurred()) { |
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1679 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1680 tty->print_cr("Unsafe: failed registering %s", message); |
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1681 } |
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1682 env->ExceptionClear(); |
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1683 return false; |
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1684 } else { |
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1685 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1686 tty->print_cr("Unsafe: successfully registered %s", message); |
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1687 } |
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1688 return true; |
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1689 } |
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1690 } |
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1691 |
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1692 |
0 | 1693 // This one function is exported, used by NativeLookup. |
1694 // The Unsafe_xxx functions above are called only from the interpreter. | |
1695 // The optimizer looks at names and signatures to recognize | |
1696 // individual functions. | |
1697 | |
1698 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
1699 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
1700 { | |
1701 ThreadToNativeFromVM ttnfv(thread); | |
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1702 |
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1703 // Unsafe methods |
0 | 1704 { |
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1705 bool success = false; |
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1706 // 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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1707 if (!success) { |
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1708 success = register_natives("1.6 methods", env, unsafecls, methods_16, sizeof(methods_16)/sizeof(JNINativeMethod)); |
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1709 } |
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1710 if (!success) { |
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1711 success = register_natives("1.8 methods", env, unsafecls, methods_18, sizeof(methods_18)/sizeof(JNINativeMethod)); |
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1712 } |
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1713 if (!success) { |
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1714 success = register_natives("1.5 methods", env, unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); |
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1715 } |
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1716 if (!success) { |
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1717 success = register_natives("1.4.1 methods", env, unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); |
0 | 1718 } |
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1719 if (!success) { |
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1720 success = register_natives("1.4.0 methods", env, unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); |
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1721 } |
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1722 guarantee(success, "register unsafe natives"); |
0 | 1723 } |
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1724 |
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1725 // Unsafe.getLoadAverage |
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1726 register_natives("1.6 loadavg method", env, unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); |
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1727 |
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1728 // Prefetch methods |
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1729 register_natives("1.6 prefetch methods", env, unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); |
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1730 |
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1731 // Memory copy methods |
0 | 1732 { |
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1733 bool success = false; |
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1734 if (!success) { |
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1735 success = register_natives("1.7 memory copy methods", env, unsafecls, memcopy_methods_17, sizeof(memcopy_methods_17)/sizeof(JNINativeMethod)); |
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1736 } |
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1737 if (!success) { |
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1738 success = register_natives("1.5 memory copy methods", env, unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); |
0 | 1739 } |
1740 } | |
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1741 |
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1742 // Unsafe.defineAnonymousClass |
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1743 if (EnableInvokeDynamic) { |
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1744 register_natives("1.7 define anonymous class method", env, unsafecls, anonk_methods, sizeof(anonk_methods)/sizeof(JNINativeMethod)); |
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1745 } |
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1746 |
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1747 // Unsafe.shouldBeInitialized |
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1748 if (EnableInvokeDynamic) { |
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1749 register_natives("1.7 LambdaForm support", env, unsafecls, lform_methods, sizeof(lform_methods)/sizeof(JNINativeMethod)); |
0 | 1750 } |
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1751 |
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1752 // Fence methods |
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1753 register_natives("1.8 fence methods", env, unsafecls, fence_methods, sizeof(fence_methods)/sizeof(JNINativeMethod)); |
0 | 1754 } |
1755 JVM_END |