Mercurial > hg > graal-jvmci-8
annotate src/share/vm/prims/unsafe.cpp @ 23822:626f594dffa6
8139040: Fix initializations before ShouldNotReachHere() etc. and enable -Wuninitialized on linux.
Reviewed-by: stuefe, coleenp, roland
author | csahu |
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date | Tue, 01 Mar 2016 12:50:37 +0530 |
parents | f46871c6c063 |
children | d109bda16490 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2014, 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" | |
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36 #include "runtime/prefetch.inline.hpp" |
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37 #include "runtime/orderAccess.inline.hpp" |
1972 | 38 #include "runtime/reflection.hpp" |
39 #include "runtime/synchronizer.hpp" | |
40 #include "services/threadService.hpp" | |
10405 | 41 #include "trace/tracing.hpp" |
1972 | 42 #include "utilities/copy.hpp" |
43 #include "utilities/dtrace.hpp" | |
44 | |
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45 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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46 |
0 | 47 /* |
48 * Implementation of class sun.misc.Unsafe | |
49 */ | |
50 | |
4006 | 51 #ifndef USDT2 |
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52 HS_DTRACE_PROBE_DECL3(hotspot, thread__park__begin, uintptr_t, int, long long); |
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53 HS_DTRACE_PROBE_DECL1(hotspot, thread__park__end, uintptr_t); |
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54 HS_DTRACE_PROBE_DECL1(hotspot, thread__unpark, uintptr_t); |
4006 | 55 #endif /* !USDT2 */ |
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56 |
0 | 57 #define MAX_OBJECT_SIZE \ |
58 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ | |
59 + ((julong)max_jint * sizeof(double)) ) | |
60 | |
61 | |
62 #define UNSAFE_ENTRY(result_type, header) \ | |
63 JVM_ENTRY(result_type, header) | |
64 | |
65 // Can't use UNSAFE_LEAF because it has the signature of a straight | |
66 // call into the runtime (just like JVM_LEAF, funny that) but it's | |
67 // called like a Java Native and thus the wrapper built for it passes | |
68 // arguments like a JNI call. It expects those arguments to be popped | |
69 // from the stack on Intel like all good JNI args are, and adjusts the | |
70 // stack according. Since the JVM_LEAF call expects no extra | |
71 // arguments the stack isn't popped in the C code, is pushed by the | |
72 // wrapper and we get sick. | |
73 //#define UNSAFE_LEAF(result_type, header) \ | |
74 // JVM_LEAF(result_type, header) | |
75 | |
76 #define UNSAFE_END JVM_END | |
77 | |
78 #define UnsafeWrapper(arg) /*nothing, for the present*/ | |
79 | |
80 | |
81 inline void* addr_from_java(jlong addr) { | |
82 // This assert fails in a variety of ways on 32-bit systems. | |
83 // It is impossible to predict whether native code that converts | |
84 // pointers to longs will sign-extend or zero-extend the addresses. | |
85 //assert(addr == (uintptr_t)addr, "must not be odd high bits"); | |
86 return (void*)(uintptr_t)addr; | |
87 } | |
88 | |
89 inline jlong addr_to_java(void* p) { | |
90 assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); | |
91 return (uintptr_t)p; | |
92 } | |
93 | |
94 | |
95 // Note: The VM's obj_field and related accessors use byte-scaled | |
96 // ("unscaled") offsets, just as the unsafe methods do. | |
97 | |
98 // However, the method Unsafe.fieldOffset explicitly declines to | |
99 // guarantee this. The field offset values manipulated by the Java user | |
100 // through the Unsafe API are opaque cookies that just happen to be byte | |
101 // offsets. We represent this state of affairs by passing the cookies | |
102 // through conversion functions when going between the VM and the Unsafe API. | |
103 // The conversion functions just happen to be no-ops at present. | |
104 | |
105 inline jlong field_offset_to_byte_offset(jlong field_offset) { | |
106 return field_offset; | |
107 } | |
108 | |
109 inline jlong field_offset_from_byte_offset(jlong byte_offset) { | |
110 return byte_offset; | |
111 } | |
112 | |
113 inline jint invocation_key_from_method_slot(jint slot) { | |
114 return slot; | |
115 } | |
116 | |
117 inline jint invocation_key_to_method_slot(jint key) { | |
118 return key; | |
119 } | |
120 | |
121 inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { | |
122 jlong byte_offset = field_offset_to_byte_offset(field_offset); | |
123 #ifdef ASSERT | |
124 if (p != NULL) { | |
125 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
126 if (byte_offset == (jint)byte_offset) { | |
127 void* ptr_plus_disp = (address)p + byte_offset; | |
113
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128 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
0 | 129 "raw [ptr+disp] must be consistent with oop::field_base"); |
130 } | |
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131 jlong p_size = HeapWordSize * (jlong)(p->size()); |
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132 assert(byte_offset < p_size, err_msg("Unsafe access: offset " INT64_FORMAT " > object's size " INT64_FORMAT, byte_offset, p_size)); |
0 | 133 } |
134 #endif | |
135 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
136 return (address)p + (jint) byte_offset; | |
137 else | |
138 return (address)p + byte_offset; | |
139 } | |
140 | |
141 // Externally callable versions: | |
142 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
143 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
144 return field_offset; | |
145 } | |
146 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
147 return byte_offset; | |
148 } | |
149 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
150 return invocation_key_from_method_slot(slot); | |
151 } | |
152 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
153 return invocation_key_to_method_slot(key); | |
154 } | |
155 | |
156 | |
157 ///// Data in the Java heap. | |
158 | |
159 #define GET_FIELD(obj, offset, type_name, v) \ | |
160 oop p = JNIHandles::resolve(obj); \ | |
161 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
162 | |
163 #define SET_FIELD(obj, offset, type_name, x) \ | |
164 oop p = JNIHandles::resolve(obj); \ | |
165 *(type_name*)index_oop_from_field_offset_long(p, offset) = x | |
166 | |
167 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
168 oop p = JNIHandles::resolve(obj); \ | |
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169 if (support_IRIW_for_not_multiple_copy_atomic_cpu) { \ |
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170 OrderAccess::fence(); \ |
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171 } \ |
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172 volatile type_name v = OrderAccess::load_acquire((volatile type_name*)index_oop_from_field_offset_long(p, offset)); |
0 | 173 |
174 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
175 oop p = JNIHandles::resolve(obj); \ | |
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176 OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), x); |
0 | 177 |
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178 // Macros for oops that check UseCompressedOops |
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179 |
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180 #define GET_OOP_FIELD(obj, offset, v) \ |
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181 oop p = JNIHandles::resolve(obj); \ |
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182 oop v; \ |
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183 if (UseCompressedOops) { \ |
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184 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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185 v = oopDesc::decode_heap_oop(n); \ |
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186 } else { \ |
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187 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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188 } |
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189 |
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190 |
0 | 191 // Get/SetObject must be special-cased, since it works with handles. |
192 | |
193 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
194 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
195 UnsafeWrapper("Unsafe_GetObject"); | |
196 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
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197 GET_OOP_FIELD(obj, offset, v) |
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198 jobject ret = JNIHandles::make_local(env, v); |
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199 #if INCLUDE_ALL_GCS |
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200 // We could be accessing the referent field in a reference |
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201 // object. If G1 is enabled then we need to register a non-null |
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202 // referent with the SATB barrier. |
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203 if (UseG1GC) { |
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204 bool needs_barrier = false; |
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205 |
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206 if (ret != NULL) { |
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207 if (offset == java_lang_ref_Reference::referent_offset) { |
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208 oop o = JNIHandles::resolve_non_null(obj); |
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209 Klass* k = o->klass(); |
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210 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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211 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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212 needs_barrier = true; |
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213 } |
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214 } |
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215 } |
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216 |
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217 if (needs_barrier) { |
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218 oop referent = JNIHandles::resolve(ret); |
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219 G1SATBCardTableModRefBS::enqueue(referent); |
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220 } |
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221 } |
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222 #endif // INCLUDE_ALL_GCS |
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223 return ret; |
0 | 224 UNSAFE_END |
225 | |
226 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
227 UnsafeWrapper("Unsafe_SetObject"); | |
228 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
229 oop x = JNIHandles::resolve(x_h); | |
230 //SET_FIELD(obj, offset, oop, x); | |
231 oop p = JNIHandles::resolve(obj); | |
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232 if (UseCompressedOops) { |
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233 if (x != NULL) { |
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234 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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235 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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236 } else { |
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237 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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238 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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239 } |
0 | 240 } else { |
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241 if (x != NULL) { |
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242 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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243 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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244 } else { |
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245 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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246 } |
0 | 247 } |
248 UNSAFE_END | |
249 | |
250 // The normal variants allow a null base pointer with an arbitrary address. | |
251 // But if the base pointer is non-null, the offset should make some sense. | |
252 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
253 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
254 UnsafeWrapper("Unsafe_GetObject"); | |
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255 GET_OOP_FIELD(obj, offset, v) |
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256 jobject ret = JNIHandles::make_local(env, v); |
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257 #if INCLUDE_ALL_GCS |
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258 // We could be accessing the referent field in a reference |
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259 // object. If G1 is enabled then we need to register non-null |
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260 // referent with the SATB barrier. |
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261 if (UseG1GC) { |
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262 bool needs_barrier = false; |
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263 |
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264 if (ret != NULL) { |
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265 if (offset == java_lang_ref_Reference::referent_offset && obj != NULL) { |
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266 oop o = JNIHandles::resolve(obj); |
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267 Klass* k = o->klass(); |
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268 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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269 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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270 needs_barrier = true; |
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271 } |
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272 } |
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273 } |
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274 |
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275 if (needs_barrier) { |
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276 oop referent = JNIHandles::resolve(ret); |
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277 G1SATBCardTableModRefBS::enqueue(referent); |
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278 } |
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279 } |
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280 #endif // INCLUDE_ALL_GCS |
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281 return ret; |
0 | 282 UNSAFE_END |
283 | |
284 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
285 UnsafeWrapper("Unsafe_SetObject"); | |
286 oop x = JNIHandles::resolve(x_h); | |
287 oop p = JNIHandles::resolve(obj); | |
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288 if (UseCompressedOops) { |
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289 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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290 } else { |
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291 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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292 } |
0 | 293 UNSAFE_END |
294 | |
295 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
296 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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297 oop p = JNIHandles::resolve(obj); |
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298 void* addr = index_oop_from_field_offset_long(p, offset); |
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299 volatile oop v; |
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300 if (UseCompressedOops) { |
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301 volatile narrowOop n = *(volatile narrowOop*) addr; |
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302 (void)const_cast<oop&>(v = oopDesc::decode_heap_oop(n)); |
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303 } else { |
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304 (void)const_cast<oop&>(v = *(volatile oop*) addr); |
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305 } |
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306 OrderAccess::acquire(); |
0 | 307 return JNIHandles::make_local(env, v); |
308 UNSAFE_END | |
309 | |
310 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
311 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
312 oop x = JNIHandles::resolve(x_h); | |
313 oop p = JNIHandles::resolve(obj); | |
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314 void* addr = index_oop_from_field_offset_long(p, offset); |
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315 OrderAccess::release(); |
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316 if (UseCompressedOops) { |
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317 oop_store((narrowOop*)addr, x); |
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318 } else { |
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319 oop_store((oop*)addr, x); |
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320 } |
0 | 321 OrderAccess::fence(); |
322 UNSAFE_END | |
323 | |
10235 | 324 #ifndef SUPPORTS_NATIVE_CX8 |
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325 |
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326 // VM_Version::supports_cx8() is a surrogate for 'supports atomic long memory ops'. |
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327 // |
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328 // On platforms which do not support atomic compare-and-swap of jlong (8 byte) |
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329 // values we have to use a lock-based scheme to enforce atomicity. This has to be |
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330 // applied to all Unsafe operations that set the value of a jlong field. Even so |
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331 // the compareAndSwapLong operation will not be atomic with respect to direct stores |
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332 // to the field from Java code. It is important therefore that any Java code that |
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333 // utilizes these Unsafe jlong operations does not perform direct stores. To permit |
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334 // direct loads of the field from Java code we must also use Atomic::store within the |
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335 // locked regions. And for good measure, in case there are direct stores, we also |
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336 // employ Atomic::load within those regions. Note that the field in question must be |
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337 // volatile and so must have atomic load/store accesses applied at the Java level. |
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338 // |
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339 // The locking scheme could utilize a range of strategies for controlling the locking |
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340 // granularity: from a lock per-field through to a single global lock. The latter is |
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341 // the simplest and is used for the current implementation. Note that the Java object |
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342 // that contains the field, can not, in general, be used for locking. To do so can lead |
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343 // to deadlocks as we may introduce locking into what appears to the Java code to be a |
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344 // lock-free path. |
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345 // |
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346 // As all the locked-regions are very short and themselves non-blocking we can treat |
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347 // them as leaf routines and elide safepoint checks (ie we don't perform any thread |
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348 // state transitions even when blocking for the lock). Note that if we do choose to |
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349 // add safepoint checks and thread state transitions, we must ensure that we calculate |
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350 // the address of the field _after_ we have acquired the lock, else the object may have |
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351 // been moved by the GC |
0 | 352 |
353 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
354 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
355 { | |
356 if (VM_Version::supports_cx8()) { | |
357 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
358 return v; | |
359 } | |
360 else { | |
361 Handle p (THREAD, JNIHandles::resolve(obj)); | |
362 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
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363 MutexLockerEx mu(UnsafeJlong_lock, Mutex::_no_safepoint_check_flag); |
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364 jlong value = Atomic::load(addr); |
0 | 365 return value; |
366 } | |
367 } | |
368 UNSAFE_END | |
369 | |
370 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
371 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
372 { | |
373 if (VM_Version::supports_cx8()) { | |
374 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
375 } | |
376 else { | |
377 Handle p (THREAD, JNIHandles::resolve(obj)); | |
378 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
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379 MutexLockerEx mu(UnsafeJlong_lock, Mutex::_no_safepoint_check_flag); |
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380 Atomic::store(x, addr); |
0 | 381 } |
382 } | |
383 UNSAFE_END | |
384 | |
10235 | 385 #endif // not SUPPORTS_NATIVE_CX8 |
0 | 386 |
387 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
388 \ | |
389 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
390 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
391 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
392 GET_FIELD(obj, offset, jboolean, v); \ | |
393 return v; \ | |
394 UNSAFE_END \ | |
395 \ | |
396 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
397 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
398 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
399 SET_FIELD(obj, offset, jboolean, x); \ | |
400 UNSAFE_END \ | |
401 \ | |
402 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
403 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
404 GET_FIELD(obj, offset, jboolean, v); \ | |
405 return v; \ | |
406 UNSAFE_END \ | |
407 \ | |
408 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
409 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
410 SET_FIELD(obj, offset, jboolean, x); \ | |
411 UNSAFE_END \ | |
412 \ | |
413 // END DEFINE_GETSETOOP. | |
414 | |
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415 DEFINE_GETSETOOP(jboolean, Boolean) |
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416 DEFINE_GETSETOOP(jbyte, Byte) |
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417 DEFINE_GETSETOOP(jshort, Short); |
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418 DEFINE_GETSETOOP(jchar, Char); |
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419 DEFINE_GETSETOOP(jint, Int); |
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420 DEFINE_GETSETOOP(jlong, Long); |
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421 DEFINE_GETSETOOP(jfloat, Float); |
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422 DEFINE_GETSETOOP(jdouble, Double); |
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423 |
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424 #undef DEFINE_GETSETOOP |
0 | 425 |
426 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
427 \ | |
428 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
429 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
430 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
431 return v; \ | |
432 UNSAFE_END \ | |
433 \ | |
434 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
435 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
436 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
437 UNSAFE_END \ | |
438 \ | |
439 // END DEFINE_GETSETOOP_VOLATILE. | |
440 | |
441 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
442 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
443 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
444 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
445 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
446 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
447 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
448 | |
10235 | 449 #ifdef SUPPORTS_NATIVE_CX8 |
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450 DEFINE_GETSETOOP_VOLATILE(jlong, Long); |
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451 #endif |
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452 |
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453 #undef DEFINE_GETSETOOP_VOLATILE |
0 | 454 |
455 // The non-intrinsified versions of setOrdered just use setVolatile | |
456 | |
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457 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) |
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458 UnsafeWrapper("Unsafe_SetOrderedInt"); |
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459 SET_FIELD_VOLATILE(obj, offset, jint, x); |
0 | 460 UNSAFE_END |
461 | |
462 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
463 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
464 oop x = JNIHandles::resolve(x_h); | |
465 oop p = JNIHandles::resolve(obj); | |
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466 void* addr = index_oop_from_field_offset_long(p, offset); |
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467 OrderAccess::release(); |
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468 if (UseCompressedOops) { |
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469 oop_store((narrowOop*)addr, x); |
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470 } else { |
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471 oop_store((oop*)addr, x); |
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472 } |
0 | 473 OrderAccess::fence(); |
474 UNSAFE_END | |
475 | |
476 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
477 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
10235 | 478 #ifdef SUPPORTS_NATIVE_CX8 |
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479 SET_FIELD_VOLATILE(obj, offset, jlong, x); |
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480 #else |
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481 // Keep old code for platforms which may not have atomic long (8 bytes) instructions |
0 | 482 { |
483 if (VM_Version::supports_cx8()) { | |
484 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
485 } | |
486 else { | |
487 Handle p (THREAD, JNIHandles::resolve(obj)); | |
488 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
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489 MutexLockerEx mu(UnsafeJlong_lock, Mutex::_no_safepoint_check_flag); |
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490 Atomic::store(x, addr); |
0 | 491 } |
492 } | |
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493 #endif |
0 | 494 UNSAFE_END |
495 | |
7425 | 496 UNSAFE_ENTRY(void, Unsafe_LoadFence(JNIEnv *env, jobject unsafe)) |
497 UnsafeWrapper("Unsafe_LoadFence"); | |
498 OrderAccess::acquire(); | |
499 UNSAFE_END | |
500 | |
501 UNSAFE_ENTRY(void, Unsafe_StoreFence(JNIEnv *env, jobject unsafe)) | |
502 UnsafeWrapper("Unsafe_StoreFence"); | |
503 OrderAccess::release(); | |
504 UNSAFE_END | |
505 | |
506 UNSAFE_ENTRY(void, Unsafe_FullFence(JNIEnv *env, jobject unsafe)) | |
507 UnsafeWrapper("Unsafe_FullFence"); | |
508 OrderAccess::fence(); | |
509 UNSAFE_END | |
510 | |
0 | 511 ////// Data in the C heap. |
512 | |
513 // Note: These do not throw NullPointerException for bad pointers. | |
514 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
515 // | |
516 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
517 \ | |
518 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
519 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
520 void* p = addr_from_java(addr); \ | |
521 JavaThread* t = JavaThread::current(); \ | |
522 t->set_doing_unsafe_access(true); \ | |
523 java_type x = *(volatile native_type*)p; \ | |
524 t->set_doing_unsafe_access(false); \ | |
525 return x; \ | |
526 UNSAFE_END \ | |
527 \ | |
528 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
529 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
530 JavaThread* t = JavaThread::current(); \ | |
531 t->set_doing_unsafe_access(true); \ | |
532 void* p = addr_from_java(addr); \ | |
533 *(volatile native_type*)p = x; \ | |
534 t->set_doing_unsafe_access(false); \ | |
535 UNSAFE_END \ | |
536 \ | |
537 // END DEFINE_GETSETNATIVE. | |
538 | |
539 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
540 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
541 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
542 DEFINE_GETSETNATIVE(jint, Int, jint); | |
543 // no long -- handled specially | |
544 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
545 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
546 | |
547 #undef DEFINE_GETSETNATIVE | |
548 | |
549 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
550 UnsafeWrapper("Unsafe_GetNativeLong"); | |
551 JavaThread* t = JavaThread::current(); | |
552 // We do it this way to avoid problems with access to heap using 64 | |
553 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
554 // some CPUs (SPARC) it leads to SIGBUS. | |
555 t->set_doing_unsafe_access(true); | |
556 void* p = addr_from_java(addr); | |
557 jlong x; | |
558 if (((intptr_t)p & 7) == 0) { | |
559 // jlong is aligned, do a volatile access | |
560 x = *(volatile jlong*)p; | |
561 } else { | |
562 jlong_accessor acc; | |
563 acc.words[0] = ((volatile jint*)p)[0]; | |
564 acc.words[1] = ((volatile jint*)p)[1]; | |
565 x = acc.long_value; | |
566 } | |
567 t->set_doing_unsafe_access(false); | |
568 return x; | |
569 UNSAFE_END | |
570 | |
571 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
572 UnsafeWrapper("Unsafe_SetNativeLong"); | |
573 JavaThread* t = JavaThread::current(); | |
574 // see comment for Unsafe_GetNativeLong | |
575 t->set_doing_unsafe_access(true); | |
576 void* p = addr_from_java(addr); | |
577 if (((intptr_t)p & 7) == 0) { | |
578 // jlong is aligned, do a volatile access | |
579 *(volatile jlong*)p = x; | |
580 } else { | |
581 jlong_accessor acc; | |
582 acc.long_value = x; | |
583 ((volatile jint*)p)[0] = acc.words[0]; | |
584 ((volatile jint*)p)[1] = acc.words[1]; | |
585 } | |
586 t->set_doing_unsafe_access(false); | |
587 UNSAFE_END | |
588 | |
589 | |
590 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
591 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
592 void* p = addr_from_java(addr); | |
593 return addr_to_java(*(void**)p); | |
594 UNSAFE_END | |
595 | |
596 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
597 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
598 void* p = addr_from_java(addr); | |
599 *(void**)p = addr_from_java(x); | |
600 UNSAFE_END | |
601 | |
602 | |
603 ////// Allocation requests | |
604 | |
605 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
606 UnsafeWrapper("Unsafe_AllocateInstance"); | |
607 { | |
608 ThreadToNativeFromVM ttnfv(thread); | |
609 return env->AllocObject(cls); | |
610 } | |
611 UNSAFE_END | |
612 | |
613 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
614 UnsafeWrapper("Unsafe_AllocateMemory"); | |
615 size_t sz = (size_t)size; | |
616 if (sz != (julong)size || size < 0) { | |
617 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
618 } | |
619 if (sz == 0) { | |
620 return 0; | |
621 } | |
622 sz = round_to(sz, HeapWordSize); | |
6197 | 623 void* x = os::malloc(sz, mtInternal); |
0 | 624 if (x == NULL) { |
625 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
626 } | |
627 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
628 return addr_to_java(x); | |
629 UNSAFE_END | |
630 | |
631 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
632 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
633 void* p = addr_from_java(addr); | |
634 size_t sz = (size_t)size; | |
635 if (sz != (julong)size || size < 0) { | |
636 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
637 } | |
638 if (sz == 0) { | |
639 os::free(p); | |
640 return 0; | |
641 } | |
642 sz = round_to(sz, HeapWordSize); | |
6197 | 643 void* x = (p == NULL) ? os::malloc(sz, mtInternal) : os::realloc(p, sz, mtInternal); |
0 | 644 if (x == NULL) { |
645 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
646 } | |
647 return addr_to_java(x); | |
648 UNSAFE_END | |
649 | |
650 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
651 UnsafeWrapper("Unsafe_FreeMemory"); | |
652 void* p = addr_from_java(addr); | |
653 if (p == NULL) { | |
654 return; | |
655 } | |
656 os::free(p); | |
657 UNSAFE_END | |
658 | |
659 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
660 UnsafeWrapper("Unsafe_SetMemory"); | |
661 size_t sz = (size_t)size; | |
662 if (sz != (julong)size || size < 0) { | |
663 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
664 } | |
665 char* p = (char*) addr_from_java(addr); | |
666 Copy::fill_to_memory_atomic(p, sz, value); | |
667 UNSAFE_END | |
668 | |
669 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
670 UnsafeWrapper("Unsafe_SetMemory"); | |
671 size_t sz = (size_t)size; | |
672 if (sz != (julong)size || size < 0) { | |
673 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
674 } | |
675 oop base = JNIHandles::resolve(obj); | |
676 void* p = index_oop_from_field_offset_long(base, offset); | |
677 Copy::fill_to_memory_atomic(p, sz, value); | |
678 UNSAFE_END | |
679 | |
680 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
681 UnsafeWrapper("Unsafe_CopyMemory"); | |
682 if (size == 0) { | |
683 return; | |
684 } | |
685 size_t sz = (size_t)size; | |
686 if (sz != (julong)size || size < 0) { | |
687 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
688 } | |
689 void* src = addr_from_java(srcAddr); | |
690 void* dst = addr_from_java(dstAddr); | |
691 Copy::conjoint_memory_atomic(src, dst, sz); | |
692 UNSAFE_END | |
693 | |
694 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
695 UnsafeWrapper("Unsafe_CopyMemory"); | |
696 if (size == 0) { | |
697 return; | |
698 } | |
699 size_t sz = (size_t)size; | |
700 if (sz != (julong)size || size < 0) { | |
701 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
702 } | |
703 oop srcp = JNIHandles::resolve(srcObj); | |
704 oop dstp = JNIHandles::resolve(dstObj); | |
705 if (dstp != NULL && !dstp->is_typeArray()) { | |
706 // NYI: This works only for non-oop arrays at present. | |
707 // Generalizing it would be reasonable, but requires card marking. | |
708 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
709 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
710 } | |
711 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
712 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
713 Copy::conjoint_memory_atomic(src, dst, sz); | |
714 UNSAFE_END | |
715 | |
716 | |
717 ////// Random queries | |
718 | |
719 // See comment at file start about UNSAFE_LEAF | |
720 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
721 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
722 UnsafeWrapper("Unsafe_AddressSize"); | |
723 return sizeof(void*); | |
724 UNSAFE_END | |
725 | |
726 // See comment at file start about UNSAFE_LEAF | |
727 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
728 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
729 UnsafeWrapper("Unsafe_PageSize"); | |
730 return os::vm_page_size(); | |
731 UNSAFE_END | |
732 | |
733 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
734 if (field == NULL) { | |
735 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
736 } | |
737 | |
738 oop reflected = JNIHandles::resolve_non_null(field); | |
739 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
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740 Klass* k = java_lang_Class::as_Klass(mirror); |
0 | 741 int slot = java_lang_reflect_Field::slot(reflected); |
742 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
743 | |
744 if (must_be_static >= 0) { | |
745 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
746 if (must_be_static != really_is_static) { | |
747 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
748 } | |
749 } | |
750 | |
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751 int offset = InstanceKlass::cast(k)->field_offset(slot); |
0 | 752 return field_offset_from_byte_offset(offset); |
753 } | |
754 | |
755 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
756 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
757 return find_field_offset(field, 0, THREAD); | |
758 UNSAFE_END | |
759 | |
760 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
761 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
762 return find_field_offset(field, 1, THREAD); | |
763 UNSAFE_END | |
764 | |
765 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
766 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
767 // Note: In this VM implementation, a field address is always a short | |
768 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
769 // range of the return type is never used. However, some implementations | |
770 // might put the static field inside an array shared by many classes, | |
771 // or even at a fixed address, in which case the address could be quite | |
772 // large. In that last case, this function would return NULL, since | |
773 // the address would operate alone, without any base pointer. | |
774 | |
775 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
776 | |
777 oop reflected = JNIHandles::resolve_non_null(field); | |
778 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
779 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
780 | |
781 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
782 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
783 } | |
784 | |
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785 return JNIHandles::make_local(env, mirror); |
0 | 786 UNSAFE_END |
787 | |
788 //@deprecated | |
789 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
790 UnsafeWrapper("Unsafe_FieldOffset"); | |
791 // tries (but fails) to be polymorphic between static and non-static: | |
792 jlong offset = find_field_offset(field, -1, THREAD); | |
793 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
794 return (jint)offset; | |
795 UNSAFE_END | |
796 | |
797 //@deprecated | |
798 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
799 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
800 if (clazz == NULL) { | |
801 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
802 } | |
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803 return JNIHandles::make_local(env, JNIHandles::resolve_non_null(clazz)); |
0 | 804 UNSAFE_END |
805 | |
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806 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
0 | 807 UnsafeWrapper("Unsafe_EnsureClassInitialized"); |
808 if (clazz == NULL) { | |
809 THROW(vmSymbols::java_lang_NullPointerException()); | |
810 } | |
811 oop mirror = JNIHandles::resolve_non_null(clazz); | |
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812 |
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813 Klass* klass = java_lang_Class::as_Klass(mirror); |
6983 | 814 if (klass != NULL && klass->should_be_initialized()) { |
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815 InstanceKlass* k = InstanceKlass::cast(klass); |
0 | 816 k->initialize(CHECK); |
817 } | |
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818 } |
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819 UNSAFE_END |
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820 |
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821 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
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822 UnsafeWrapper("Unsafe_ShouldBeInitialized"); |
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823 if (clazz == NULL) { |
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824 THROW_(vmSymbols::java_lang_NullPointerException(), false); |
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825 } |
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826 oop mirror = JNIHandles::resolve_non_null(clazz); |
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827 Klass* klass = java_lang_Class::as_Klass(mirror); |
6983 | 828 if (klass != NULL && klass->should_be_initialized()) { |
6266
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829 return true; |
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|
830 } |
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831 return false; |
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832 } |
0 | 833 UNSAFE_END |
834 | |
835 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
836 if (acls == NULL) { | |
837 THROW(vmSymbols::java_lang_NullPointerException()); | |
838 } | |
839 oop mirror = JNIHandles::resolve_non_null(acls); | |
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840 Klass* k = java_lang_Class::as_Klass(mirror); |
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841 if (k == NULL || !k->oop_is_array()) { |
0 | 842 THROW(vmSymbols::java_lang_InvalidClassException()); |
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843 } else if (k->oop_is_objArray()) { |
0 | 844 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); |
113
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845 scale = heapOopSize; |
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846 } else if (k->oop_is_typeArray()) { |
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847 TypeArrayKlass* tak = TypeArrayKlass::cast(k); |
0 | 848 base = tak->array_header_in_bytes(); |
849 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
850 scale = (1 << tak->log2_element_size()); | |
851 } else { | |
852 ShouldNotReachHere(); | |
853 } | |
854 } | |
855 | |
856 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
857 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
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858 int base = 0, scale = 0; |
0 | 859 getBaseAndScale(base, scale, acls, CHECK_0); |
860 return field_offset_from_byte_offset(base); | |
861 UNSAFE_END | |
862 | |
863 | |
864 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
865 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
23822
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866 int base = 0, scale = 0; |
0 | 867 getBaseAndScale(base, scale, acls, CHECK_0); |
868 // This VM packs both fields and array elements down to the byte. | |
869 // But watch out: If this changes, so that array references for | |
870 // a given primitive type (say, T_BOOLEAN) use different memory units | |
871 // than fields, this method MUST return zero for such arrays. | |
872 // For example, the VM used to store sub-word sized fields in full | |
873 // words in the object layout, so that accessors like getByte(Object,int) | |
874 // did not really do what one might expect for arrays. Therefore, | |
875 // this function used to report a zero scale factor, so that the user | |
876 // would know not to attempt to access sub-word array elements. | |
877 // // Code for unpacked fields: | |
878 // if (scale < wordSize) return 0; | |
879 | |
880 // The following allows for a pretty general fieldOffset cookie scheme, | |
881 // but requires it to be linear in byte offset. | |
882 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
883 UNSAFE_END | |
884 | |
885 | |
886 static inline void throw_new(JNIEnv *env, const char *ename) { | |
887 char buf[100]; | |
888 strcpy(buf, "java/lang/"); | |
889 strcat(buf, ename); | |
890 jclass cls = env->FindClass(buf); | |
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891 if (env->ExceptionCheck()) { |
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892 env->ExceptionClear(); |
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893 tty->print_cr("Unsafe: cannot throw %s because FindClass has failed", buf); |
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894 return; |
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895 } |
0 | 896 char* msg = NULL; |
897 env->ThrowNew(cls, msg); | |
898 } | |
899 | |
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900 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { |
0 | 901 { |
902 // Code lifted from JDK 1.3 ClassLoader.c | |
903 | |
904 jbyte *body; | |
905 char *utfName; | |
906 jclass result = 0; | |
907 char buf[128]; | |
908 | |
909 if (UsePerfData) { | |
910 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
911 } | |
912 | |
913 if (data == NULL) { | |
914 throw_new(env, "NullPointerException"); | |
915 return 0; | |
916 } | |
917 | |
918 /* Work around 4153825. malloc crashes on Solaris when passed a | |
919 * negative size. | |
920 */ | |
921 if (length < 0) { | |
922 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
923 return 0; | |
924 } | |
925 | |
6197 | 926 body = NEW_C_HEAP_ARRAY(jbyte, length, mtInternal); |
0 | 927 |
928 if (body == 0) { | |
929 throw_new(env, "OutOfMemoryError"); | |
930 return 0; | |
931 } | |
932 | |
933 env->GetByteArrayRegion(data, offset, length, body); | |
934 | |
935 if (env->ExceptionOccurred()) | |
936 goto free_body; | |
937 | |
938 if (name != NULL) { | |
939 uint len = env->GetStringUTFLength(name); | |
940 int unicode_len = env->GetStringLength(name); | |
941 if (len >= sizeof(buf)) { | |
6197 | 942 utfName = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); |
0 | 943 if (utfName == NULL) { |
944 throw_new(env, "OutOfMemoryError"); | |
945 goto free_body; | |
946 } | |
947 } else { | |
948 utfName = buf; | |
949 } | |
950 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
951 //VerifyFixClassname(utfName); | |
952 for (uint i = 0; i < len; i++) { | |
953 if (utfName[i] == '.') utfName[i] = '/'; | |
954 } | |
955 } else { | |
956 utfName = NULL; | |
957 } | |
958 | |
959 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
960 | |
961 if (utfName && utfName != buf) | |
6197 | 962 FREE_C_HEAP_ARRAY(char, utfName, mtInternal); |
0 | 963 |
964 free_body: | |
6197 | 965 FREE_C_HEAP_ARRAY(jbyte, body, mtInternal); |
0 | 966 return result; |
967 } | |
968 } | |
969 | |
970 | |
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971 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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972 UnsafeWrapper("Unsafe_DefineClass"); |
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973 { |
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974 ThreadToNativeFromVM ttnfv(thread); |
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975 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
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976 } |
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977 UNSAFE_END |
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978 |
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979 static jobject get_class_loader(JNIEnv* env, jclass cls) { |
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980 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { |
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981 return NULL; |
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982 } |
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983 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
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984 oop loader = k->class_loader(); |
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985 return JNIHandles::make_local(env, loader); |
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986 } |
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987 |
0 | 988 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) |
989 UnsafeWrapper("Unsafe_DefineClass"); | |
990 { | |
991 ThreadToNativeFromVM ttnfv(thread); | |
992 | |
993 int depthFromDefineClass0 = 1; | |
994 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
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995 jobject loader = (caller == NULL) ? NULL : get_class_loader(env, caller); |
0 | 996 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); |
997 | |
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998 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
0 | 999 } |
1000 UNSAFE_END | |
1001 | |
1002 | |
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1003 #define DAC_Args CLS"[B["OBJ |
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1004 // define a class but do not make it known to the class loader or system dictionary |
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1005 // - host_class: supplies context for linkage, access control, protection domain, and class loader |
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1006 // - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
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1007 // - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
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1008 |
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1009 // When you load an anonymous class U, it works as if you changed its name just before loading, |
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1010 // to a name that you will never use again. Since the name is lost, no other class can directly |
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1011 // link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
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1012 // through java.lang.Class methods like Class.newInstance. |
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1013 |
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1014 // Access checks for linkage sites within U continue to follow the same rules as for named classes. |
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1015 // The package of an anonymous class is given by the package qualifier on the name under which it was loaded. |
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1016 // An anonymous class also has special privileges to access any member of its host class. |
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1017 // This is the main reason why this loading operation is unsafe. The purpose of this is to |
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1018 // allow language implementations to simulate "open classes"; a host class in effect gets |
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1019 // new code when an anonymous class is loaded alongside it. A less convenient but more |
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1020 // standard way to do this is with reflection, which can also be set to ignore access |
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1021 // restrictions. |
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1022 |
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1023 // Access into an anonymous class is possible only through reflection. Therefore, there |
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1024 // are no special access rules for calling into an anonymous class. The relaxed access |
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1025 // rule for the host class is applied in the opposite direction: A host class reflectively |
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1026 // access one of its anonymous classes. |
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1027 |
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1028 // If you load the same bytecodes twice, you get two different classes. You can reload |
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1029 // the same bytecodes with or without varying CP patches. |
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1030 |
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1031 // By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
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1032 // The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
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1033 // The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
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1034 |
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1035 // This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
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1036 // an outer class (so that U2 is an anonymous inner class of anonymous U1). |
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1037 // It is not possible for a named class, or an older anonymous class, to refer by |
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1038 // name (via its CP) to a newer anonymous class. |
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1039 |
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1040 // CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
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1041 // or type descriptors used in the loaded anonymous class. |
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1042 |
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1043 // Finally, CP patching may be used to introduce "live" objects into the constant pool, |
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1044 // instead of "dead" strings. A compiled statement like println((Object)"hello") can |
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1045 // be changed to println(greeting), where greeting is an arbitrary object created before |
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1046 // the anonymous class is loaded. This is useful in dynamic languages, in which |
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1047 // various kinds of metaobjects must be introduced as constants into bytecode. |
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1048 // Note the cast (Object), which tells the verifier to expect an arbitrary object, |
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1049 // not just a literal string. For such ldc instructions, the verifier uses the |
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1050 // type Object instead of String, if the loaded constant is not in fact a String. |
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1051 |
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1052 static instanceKlassHandle |
431
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1053 Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
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1054 jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
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1055 HeapWord* *temp_alloc, |
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1056 TRAPS) { |
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1057 |
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1058 if (UsePerfData) { |
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1059 ClassLoader::unsafe_defineClassCallCounter()->inc(); |
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1060 } |
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1061 |
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1062 if (data == NULL) { |
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1063 THROW_0(vmSymbols::java_lang_NullPointerException()); |
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1064 } |
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1065 |
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1066 jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
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1067 jint word_length = (length + sizeof(HeapWord)-1) / sizeof(HeapWord); |
6197 | 1068 HeapWord* body = NEW_C_HEAP_ARRAY(HeapWord, word_length, mtInternal); |
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1069 if (body == NULL) { |
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1070 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
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1071 } |
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1072 |
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1073 // caller responsible to free it: |
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1074 (*temp_alloc) = body; |
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1075 |
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1076 { |
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1077 jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
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1078 Copy::conjoint_words((HeapWord*) array_base, body, word_length); |
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1079 } |
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1080 |
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1081 u1* class_bytes = (u1*) body; |
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1082 int class_bytes_length = (int) length; |
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1083 if (class_bytes_length < 0) class_bytes_length = 0; |
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1084 if (class_bytes == NULL |
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1085 || host_class == NULL |
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1086 || length != class_bytes_length) |
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1087 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1088 |
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1089 objArrayHandle cp_patches_h; |
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1090 if (cp_patches_jh != NULL) { |
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1091 oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
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1092 if (!p->is_objArray()) |
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1093 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1094 cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
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1095 } |
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1096 |
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1097 KlassHandle host_klass(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(host_class))); |
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1098 const char* host_source = host_klass->external_name(); |
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1099 Handle host_loader(THREAD, host_klass->class_loader()); |
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1100 Handle host_domain(THREAD, host_klass->protection_domain()); |
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1101 |
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1102 GrowableArray<Handle>* cp_patches = NULL; |
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1103 if (cp_patches_h.not_null()) { |
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1104 int alen = cp_patches_h->length(); |
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1105 for (int i = alen-1; i >= 0; i--) { |
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1106 oop p = cp_patches_h->obj_at(i); |
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1107 if (p != NULL) { |
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1108 Handle patch(THREAD, p); |
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1109 if (cp_patches == NULL) |
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1110 cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
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1111 cp_patches->at_put(i, patch); |
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1112 } |
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1113 } |
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1114 } |
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1115 |
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1116 ClassFileStream st(class_bytes, class_bytes_length, (char*) host_source); |
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1117 |
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1118 instanceKlassHandle anon_klass; |
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1119 { |
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1120 Symbol* no_class_name = NULL; |
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1121 Klass* anonk = SystemDictionary::parse_stream(no_class_name, |
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1122 host_loader, host_domain, |
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1123 &st, host_klass, cp_patches, |
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1124 CHECK_NULL); |
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1125 if (anonk == NULL) return NULL; |
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1126 anon_klass = instanceKlassHandle(THREAD, anonk); |
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1127 } |
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1128 |
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1129 return anon_klass; |
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1130 } |
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1131 |
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1132 UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) |
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1133 { |
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1134 instanceKlassHandle anon_klass; |
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1135 jobject res_jh = NULL; |
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1136 |
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1137 UnsafeWrapper("Unsafe_DefineAnonymousClass"); |
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1138 ResourceMark rm(THREAD); |
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1139 |
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1140 HeapWord* temp_alloc = NULL; |
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1141 |
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1142 anon_klass = Unsafe_DefineAnonymousClass_impl(env, host_class, data, |
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1143 cp_patches_jh, |
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1144 &temp_alloc, THREAD); |
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1145 if (anon_klass() != NULL) |
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1146 res_jh = JNIHandles::make_local(env, anon_klass->java_mirror()); |
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1147 |
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1148 // try/finally clause: |
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1149 if (temp_alloc != NULL) { |
6197 | 1150 FREE_C_HEAP_ARRAY(HeapWord, temp_alloc, mtInternal); |
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1151 } |
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1152 |
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1153 // The anonymous class loader data has been artificially been kept alive to |
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1154 // this point. The mirror and any instances of this class have to keep |
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1155 // it alive afterwards. |
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1156 if (anon_klass() != NULL) { |
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1157 anon_klass->class_loader_data()->set_keep_alive(false); |
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1158 } |
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1159 |
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1160 // let caller initialize it as needed... |
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1161 |
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1162 return (jclass) res_jh; |
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1163 } |
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1164 UNSAFE_END |
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1165 |
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1166 |
0 | 1167 |
1168 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1169 UnsafeWrapper("Unsafe_MonitorEnter"); | |
1170 { | |
1171 if (jobj == NULL) { | |
1172 THROW(vmSymbols::java_lang_NullPointerException()); | |
1173 } | |
1174 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1175 ObjectSynchronizer::jni_enter(obj, CHECK); | |
1176 } | |
1177 UNSAFE_END | |
1178 | |
1179 | |
1180 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1181 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
1182 { | |
1183 if (jobj == NULL) { | |
1184 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
1185 } | |
1186 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1187 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
1188 return (res ? JNI_TRUE : JNI_FALSE); | |
1189 } | |
1190 UNSAFE_END | |
1191 | |
1192 | |
1193 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1194 UnsafeWrapper("Unsafe_MonitorExit"); | |
1195 { | |
1196 if (jobj == NULL) { | |
1197 THROW(vmSymbols::java_lang_NullPointerException()); | |
1198 } | |
1199 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
1200 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
1201 } | |
1202 UNSAFE_END | |
1203 | |
1204 | |
1205 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
1206 UnsafeWrapper("Unsafe_ThrowException"); | |
1207 { | |
1208 ThreadToNativeFromVM ttnfv(thread); | |
1209 env->Throw(thr); | |
1210 } | |
1211 UNSAFE_END | |
1212 | |
1213 // JSR166 ------------------------------------------------------------------ | |
1214 | |
1215 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
1216 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
1217 oop x = JNIHandles::resolve(x_h); | |
1218 oop e = JNIHandles::resolve(e_h); | |
1219 oop p = JNIHandles::resolve(obj); | |
113
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1220 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
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1221 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e, true); |
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1222 jboolean success = (res == e); |
0 | 1223 if (success) |
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1224 update_barrier_set((void*)addr, x); |
0 | 1225 return success; |
1226 UNSAFE_END | |
1227 | |
1228 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
1229 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
1230 oop p = JNIHandles::resolve(obj); | |
1231 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
1232 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
1233 UNSAFE_END | |
1234 | |
1235 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
1236 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
1237 Handle p (THREAD, JNIHandles::resolve(obj)); | |
1238 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
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1239 #ifdef SUPPORTS_NATIVE_CX8 |
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1240 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; |
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1241 #else |
0 | 1242 if (VM_Version::supports_cx8()) |
1243 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
1244 else { | |
1245 jboolean success = false; | |
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1246 MutexLockerEx mu(UnsafeJlong_lock, Mutex::_no_safepoint_check_flag); |
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1247 jlong val = Atomic::load(addr); |
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1248 if (val == e) { Atomic::store(x, addr); success = true; } |
0 | 1249 return success; |
1250 } | |
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1251 #endif |
0 | 1252 UNSAFE_END |
1253 | |
1254 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
1255 UnsafeWrapper("Unsafe_Park"); | |
10405 | 1256 EventThreadPark event; |
4006 | 1257 #ifndef USDT2 |
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1258 HS_DTRACE_PROBE3(hotspot, thread__park__begin, thread->parker(), (int) isAbsolute, time); |
4006 | 1259 #else /* USDT2 */ |
1260 HOTSPOT_THREAD_PARK_BEGIN( | |
1261 (uintptr_t) thread->parker(), (int) isAbsolute, time); | |
1262 #endif /* USDT2 */ | |
0 | 1263 JavaThreadParkedState jtps(thread, time != 0); |
1264 thread->parker()->park(isAbsolute != 0, time); | |
4006 | 1265 #ifndef USDT2 |
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1266 HS_DTRACE_PROBE1(hotspot, thread__park__end, thread->parker()); |
4006 | 1267 #else /* USDT2 */ |
1268 HOTSPOT_THREAD_PARK_END( | |
1269 (uintptr_t) thread->parker()); | |
1270 #endif /* USDT2 */ | |
10405 | 1271 if (event.should_commit()) { |
1272 oop obj = thread->current_park_blocker(); | |
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1273 event.set_klass((obj != NULL) ? obj->klass() : NULL); |
10405 | 1274 event.set_timeout(time); |
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1275 event.set_address((obj != NULL) ? (TYPE_ADDRESS) cast_from_oop<uintptr_t>(obj) : 0); |
10405 | 1276 event.commit(); |
1277 } | |
0 | 1278 UNSAFE_END |
1279 | |
1280 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
1281 UnsafeWrapper("Unsafe_Unpark"); | |
1282 Parker* p = NULL; | |
1283 if (jthread != NULL) { | |
1284 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
1285 if (java_thread != NULL) { | |
1286 jlong lp = java_lang_Thread::park_event(java_thread); | |
1287 if (lp != 0) { | |
1288 // This cast is OK even though the jlong might have been read | |
1289 // non-atomically on 32bit systems, since there, one word will | |
1290 // always be zero anyway and the value set is always the same | |
1291 p = (Parker*)addr_from_java(lp); | |
1292 } else { | |
1293 // Grab lock if apparently null or using older version of library | |
1294 MutexLocker mu(Threads_lock); | |
1295 java_thread = JNIHandles::resolve_non_null(jthread); | |
1296 if (java_thread != NULL) { | |
1297 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
1298 if (thr != NULL) { | |
1299 p = thr->parker(); | |
1300 if (p != NULL) { // Bind to Java thread for next time. | |
1301 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
1302 } | |
1303 } | |
1304 } | |
1305 } | |
1306 } | |
1307 } | |
1308 if (p != NULL) { | |
4006 | 1309 #ifndef USDT2 |
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1310 HS_DTRACE_PROBE1(hotspot, thread__unpark, p); |
4006 | 1311 #else /* USDT2 */ |
1312 HOTSPOT_THREAD_UNPARK( | |
1313 (uintptr_t) p); | |
1314 #endif /* USDT2 */ | |
0 | 1315 p->unpark(); |
1316 } | |
1317 UNSAFE_END | |
1318 | |
1319 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
1320 UnsafeWrapper("Unsafe_Loadavg"); | |
1321 const int max_nelem = 3; | |
1322 double la[max_nelem]; | |
1323 jint ret; | |
1324 | |
1325 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
1326 assert(a->is_typeArray(), "must be type array"); | |
1327 | |
1328 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
1329 ThreadToNativeFromVM ttnfv(thread); | |
1330 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
1331 return -1; | |
1332 } | |
1333 | |
1334 ret = os::loadavg(la, nelem); | |
1335 if (ret == -1) return -1; | |
1336 | |
1337 // if successful, ret is the number of samples actually retrieved. | |
1338 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
1339 switch(ret) { | |
1340 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
1341 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
1342 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
1343 } | |
1344 return ret; | |
1345 UNSAFE_END | |
1346 | |
1347 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1348 UnsafeWrapper("Unsafe_PrefetchRead"); | |
1349 oop p = JNIHandles::resolve(obj); | |
1350 void* addr = index_oop_from_field_offset_long(p, 0); | |
1351 Prefetch::read(addr, (intx)offset); | |
1352 UNSAFE_END | |
1353 | |
1354 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1355 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
1356 oop p = JNIHandles::resolve(obj); | |
1357 void* addr = index_oop_from_field_offset_long(p, 0); | |
1358 Prefetch::write(addr, (intx)offset); | |
1359 UNSAFE_END | |
1360 | |
1361 | |
1362 /// JVM_RegisterUnsafeMethods | |
1363 | |
1364 #define ADR "J" | |
1365 | |
1366 #define LANG "Ljava/lang/" | |
1367 | |
1368 #define OBJ LANG"Object;" | |
1369 #define CLS LANG"Class;" | |
1370 #define CTR LANG"reflect/Constructor;" | |
1371 #define FLD LANG"reflect/Field;" | |
1372 #define MTH LANG"reflect/Method;" | |
1373 #define THR LANG"Throwable;" | |
1374 | |
1375 #define DC0_Args LANG"String;[BII" | |
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1376 #define DC_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" |
0 | 1377 |
1378 #define CC (char*) /*cast a literal from (const char*)*/ | |
1379 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
1380 | |
1381 // define deprecated accessors for compabitility with 1.4.0 | |
1382 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
1383 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
1384 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
1385 | |
1386 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
1387 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
1388 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1389 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
1390 | |
1391 // Note: In 1.5.0, there are volatile versions too | |
1392 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
1393 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1394 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
1395 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
1396 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
1397 | |
1398 | |
1399 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
1400 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
1401 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
1402 | |
1403 | |
1404 | |
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1405 // These are the methods for 1.4.0 |
0 | 1406 static JNINativeMethod methods_140[] = { |
1407 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
1408 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
1409 | |
1410 DECLARE_GETSETOOP_140(Boolean, Z), | |
1411 DECLARE_GETSETOOP_140(Byte, B), | |
1412 DECLARE_GETSETOOP_140(Short, S), | |
1413 DECLARE_GETSETOOP_140(Char, C), | |
1414 DECLARE_GETSETOOP_140(Int, I), | |
1415 DECLARE_GETSETOOP_140(Long, J), | |
1416 DECLARE_GETSETOOP_140(Float, F), | |
1417 DECLARE_GETSETOOP_140(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 | |
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1434 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, |
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1435 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, |
0 | 1436 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
1437 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1438 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1439 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1440 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1441 | |
1442 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1443 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1444 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1445 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1446 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1447 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1448 }; | |
1449 | |
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1450 // These are the methods prior to the JSR 166 changes in 1.5.0 |
0 | 1451 static JNINativeMethod methods_141[] = { |
1452 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1453 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1454 | |
1455 DECLARE_GETSETOOP_141(Boolean, Z), | |
1456 DECLARE_GETSETOOP_141(Byte, B), | |
1457 DECLARE_GETSETOOP_141(Short, S), | |
1458 DECLARE_GETSETOOP_141(Char, C), | |
1459 DECLARE_GETSETOOP_141(Int, I), | |
1460 DECLARE_GETSETOOP_141(Long, J), | |
1461 DECLARE_GETSETOOP_141(Float, F), | |
1462 DECLARE_GETSETOOP_141(Double, D), | |
1463 | |
1464 DECLARE_GETSETNATIVE(Byte, B), | |
1465 DECLARE_GETSETNATIVE(Short, S), | |
1466 DECLARE_GETSETNATIVE(Char, C), | |
1467 DECLARE_GETSETNATIVE(Int, I), | |
1468 DECLARE_GETSETNATIVE(Long, J), | |
1469 DECLARE_GETSETNATIVE(Float, F), | |
1470 DECLARE_GETSETNATIVE(Double, D), | |
1471 | |
1472 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1473 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1474 | |
1475 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1476 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1477 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1478 | |
1479 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1480 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1481 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1482 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1483 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1484 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1485 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1486 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1487 | |
1488 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1489 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1490 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1491 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1492 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1493 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1494 | |
1495 }; | |
1496 | |
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1497 // These are the methods prior to the JSR 166 changes in 1.6.0 |
0 | 1498 static JNINativeMethod methods_15[] = { |
1499 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1500 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1501 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1502 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1503 | |
1504 | |
1505 DECLARE_GETSETOOP(Boolean, Z), | |
1506 DECLARE_GETSETOOP(Byte, B), | |
1507 DECLARE_GETSETOOP(Short, S), | |
1508 DECLARE_GETSETOOP(Char, C), | |
1509 DECLARE_GETSETOOP(Int, I), | |
1510 DECLARE_GETSETOOP(Long, J), | |
1511 DECLARE_GETSETOOP(Float, F), | |
1512 DECLARE_GETSETOOP(Double, D), | |
1513 | |
1514 DECLARE_GETSETNATIVE(Byte, B), | |
1515 DECLARE_GETSETNATIVE(Short, S), | |
1516 DECLARE_GETSETNATIVE(Char, C), | |
1517 DECLARE_GETSETNATIVE(Int, I), | |
1518 DECLARE_GETSETNATIVE(Long, J), | |
1519 DECLARE_GETSETNATIVE(Float, F), | |
1520 DECLARE_GETSETNATIVE(Double, D), | |
1521 | |
1522 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1523 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1524 | |
1525 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1526 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1527 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1528 | |
1529 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1530 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1531 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1532 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1533 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1534 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1535 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1536 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1537 | |
1538 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1539 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1540 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1541 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1542 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1543 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1544 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1545 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1546 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1547 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1548 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1549 | |
1550 }; | |
1551 | |
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1552 // These are the methods for 1.6.0 and 1.7.0 |
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1553 static JNINativeMethod methods_16[] = { |
0 | 1554 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
1555 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1556 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1557 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1558 | |
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1559 DECLARE_GETSETOOP(Boolean, Z), |
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1560 DECLARE_GETSETOOP(Byte, B), |
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1561 DECLARE_GETSETOOP(Short, S), |
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1562 DECLARE_GETSETOOP(Char, C), |
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1563 DECLARE_GETSETOOP(Int, I), |
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1564 DECLARE_GETSETOOP(Long, J), |
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1565 DECLARE_GETSETOOP(Float, F), |
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1566 DECLARE_GETSETOOP(Double, D), |
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1567 |
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1568 DECLARE_GETSETNATIVE(Byte, B), |
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1569 DECLARE_GETSETNATIVE(Short, S), |
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1570 DECLARE_GETSETNATIVE(Char, C), |
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1571 DECLARE_GETSETNATIVE(Int, I), |
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1572 DECLARE_GETSETNATIVE(Long, J), |
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1573 DECLARE_GETSETNATIVE(Float, F), |
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1574 DECLARE_GETSETNATIVE(Double, D), |
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1575 |
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1576 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, |
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1577 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, |
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1578 |
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1579 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, |
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1580 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, |
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1581 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, |
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1582 |
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1583 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, |
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1584 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, |
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1585 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, |
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1586 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
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1587 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, |
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1588 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, |
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1589 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, |
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1590 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, |
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1591 |
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1592 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, |
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1593 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
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1594 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
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1595 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, |
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1596 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, |
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1597 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, |
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1598 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, |
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1599 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, |
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1600 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, |
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1601 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, |
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1602 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, |
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1603 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, |
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1604 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, |
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1605 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, |
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1606 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} |
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1607 }; |
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1608 |
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1609 // These are the methods for 1.8.0 |
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1610 static JNINativeMethod methods_18[] = { |
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1611 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
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1612 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, |
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1613 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, |
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1614 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, |
0 | 1615 |
1616 DECLARE_GETSETOOP(Boolean, Z), | |
1617 DECLARE_GETSETOOP(Byte, B), | |
1618 DECLARE_GETSETOOP(Short, S), | |
1619 DECLARE_GETSETOOP(Char, C), | |
1620 DECLARE_GETSETOOP(Int, I), | |
1621 DECLARE_GETSETOOP(Long, J), | |
1622 DECLARE_GETSETOOP(Float, F), | |
1623 DECLARE_GETSETOOP(Double, D), | |
1624 | |
1625 DECLARE_GETSETNATIVE(Byte, B), | |
1626 DECLARE_GETSETNATIVE(Short, S), | |
1627 DECLARE_GETSETNATIVE(Char, C), | |
1628 DECLARE_GETSETNATIVE(Int, I), | |
1629 DECLARE_GETSETNATIVE(Long, J), | |
1630 DECLARE_GETSETNATIVE(Float, F), | |
1631 DECLARE_GETSETNATIVE(Double, D), | |
1632 | |
1633 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1634 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1635 | |
1636 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1637 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1638 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1639 | |
1640 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1641 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1642 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1643 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1644 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1645 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1646 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1647 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1648 | |
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1649 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1650 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1651 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1652 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1653 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
1654 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1655 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1656 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1657 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1658 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
1659 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
1660 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
1661 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1662 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1663 }; | |
1664 | |
1665 JNINativeMethod loadavg_method[] = { | |
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1666 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} |
0 | 1667 }; |
1668 | |
1669 JNINativeMethod prefetch_methods[] = { | |
1670 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1671 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
1672 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1673 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1674 }; | |
1675 | |
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1676 JNINativeMethod memcopy_methods_17[] = { |
0 | 1677 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, |
1678 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
1679 }; | |
1680 | |
1681 JNINativeMethod memcopy_methods_15[] = { | |
1682 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1683 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
1684 }; | |
1685 | |
431
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1686 JNINativeMethod anonk_methods[] = { |
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1687 {CC"defineAnonymousClass", CC"("DAC_Args")"CLS, FN_PTR(Unsafe_DefineAnonymousClass)}, |
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1688 }; |
0 | 1689 |
6266
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1690 JNINativeMethod lform_methods[] = { |
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1691 {CC"shouldBeInitialized",CC"("CLS")Z", FN_PTR(Unsafe_ShouldBeInitialized)}, |
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1692 }; |
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1693 |
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1694 JNINativeMethod fence_methods[] = { |
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1695 {CC"loadFence", CC"()V", FN_PTR(Unsafe_LoadFence)}, |
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1696 {CC"storeFence", CC"()V", FN_PTR(Unsafe_StoreFence)}, |
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1697 {CC"fullFence", CC"()V", FN_PTR(Unsafe_FullFence)}, |
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1698 }; |
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1699 |
0 | 1700 #undef CC |
1701 #undef FN_PTR | |
1702 | |
1703 #undef ADR | |
1704 #undef LANG | |
1705 #undef OBJ | |
1706 #undef CLS | |
1707 #undef CTR | |
1708 #undef FLD | |
1709 #undef MTH | |
1710 #undef THR | |
1711 #undef DC0_Args | |
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1712 #undef DC_Args |
0 | 1713 |
1714 #undef DECLARE_GETSETOOP | |
1715 #undef DECLARE_GETSETNATIVE | |
1716 | |
1717 | |
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1718 /** |
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1719 * Helper method to register native methods. |
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1720 */ |
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1721 static bool register_natives(const char* message, JNIEnv* env, jclass clazz, const JNINativeMethod* methods, jint nMethods) { |
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1722 int status = env->RegisterNatives(clazz, methods, nMethods); |
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1723 if (status < 0 || env->ExceptionOccurred()) { |
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1724 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1725 tty->print_cr("Unsafe: failed registering %s", message); |
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1726 } |
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|
1727 env->ExceptionClear(); |
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1728 return false; |
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|
1729 } else { |
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1730 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1731 tty->print_cr("Unsafe: successfully registered %s", message); |
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1732 } |
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1733 return true; |
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|
1734 } |
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1735 } |
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|
1736 |
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1737 |
0 | 1738 // This one function is exported, used by NativeLookup. |
1739 // The Unsafe_xxx functions above are called only from the interpreter. | |
1740 // The optimizer looks at names and signatures to recognize | |
1741 // individual functions. | |
1742 | |
1743 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
1744 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
1745 { | |
1746 ThreadToNativeFromVM ttnfv(thread); | |
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1747 |
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1748 // Unsafe methods |
0 | 1749 { |
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1750 bool success = false; |
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1751 // 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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1752 if (!success) { |
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1753 success = register_natives("1.6 methods", env, unsafecls, methods_16, sizeof(methods_16)/sizeof(JNINativeMethod)); |
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1754 } |
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1755 if (!success) { |
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1756 success = register_natives("1.8 methods", env, unsafecls, methods_18, sizeof(methods_18)/sizeof(JNINativeMethod)); |
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1757 } |
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1758 if (!success) { |
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1759 success = register_natives("1.5 methods", env, unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); |
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1760 } |
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1761 if (!success) { |
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1762 success = register_natives("1.4.1 methods", env, unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); |
0 | 1763 } |
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1764 if (!success) { |
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1765 success = register_natives("1.4.0 methods", env, unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); |
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1766 } |
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1767 guarantee(success, "register unsafe natives"); |
0 | 1768 } |
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1769 |
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1770 // Unsafe.getLoadAverage |
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1771 register_natives("1.6 loadavg method", env, unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); |
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1772 |
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1773 // Prefetch methods |
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1774 register_natives("1.6 prefetch methods", env, unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); |
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1775 |
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1776 // Memory copy methods |
0 | 1777 { |
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1778 bool success = false; |
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1779 if (!success) { |
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1780 success = register_natives("1.7 memory copy methods", env, unsafecls, memcopy_methods_17, sizeof(memcopy_methods_17)/sizeof(JNINativeMethod)); |
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1781 } |
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1782 if (!success) { |
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1783 success = register_natives("1.5 memory copy methods", env, unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); |
0 | 1784 } |
1785 } | |
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1786 |
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1787 // Unsafe.defineAnonymousClass |
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1788 if (EnableInvokeDynamic) { |
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1789 register_natives("1.7 define anonymous class method", env, unsafecls, anonk_methods, sizeof(anonk_methods)/sizeof(JNINativeMethod)); |
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1790 } |
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1791 |
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1792 // Unsafe.shouldBeInitialized |
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1793 if (EnableInvokeDynamic) { |
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1794 register_natives("1.7 LambdaForm support", env, unsafecls, lform_methods, sizeof(lform_methods)/sizeof(JNINativeMethod)); |
0 | 1795 } |
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1796 |
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1797 // Fence methods |
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1798 register_natives("1.8 fence methods", env, unsafecls, fence_methods, sizeof(fence_methods)/sizeof(JNINativeMethod)); |
0 | 1799 } |
1800 JVM_END |