Mercurial > hg > truffle
annotate src/share/vm/prims/unsafe.cpp @ 14380:e6195383bcaf
8034080: Remove the USDT1 dtrace code from Hotspot
Reviewed-by: dholmes, coleenp
author | sla |
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date | Tue, 18 Feb 2014 09:15:40 +0100 |
parents | 4f6bf7dd3f52 |
children | 28f281e8de1d |
rev | line source |
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0 | 1 /* |
10405 | 2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/vmSymbols.hpp" | |
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27 #include "utilities/macros.hpp" |
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28 #if INCLUDE_ALL_GCS |
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29 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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30 #endif // INCLUDE_ALL_GCS |
1972 | 31 #include "memory/allocation.inline.hpp" |
32 #include "prims/jni.h" | |
33 #include "prims/jvm.h" | |
34 #include "runtime/globals.hpp" | |
35 #include "runtime/interfaceSupport.hpp" | |
36 #include "runtime/reflection.hpp" | |
37 #include "runtime/synchronizer.hpp" | |
38 #include "services/threadService.hpp" | |
10405 | 39 #include "trace/tracing.hpp" |
1972 | 40 #include "utilities/copy.hpp" |
41 #include "utilities/dtrace.hpp" | |
42 | |
0 | 43 /* |
44 * Implementation of class sun.misc.Unsafe | |
45 */ | |
46 | |
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47 |
0 | 48 #define MAX_OBJECT_SIZE \ |
49 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ | |
50 + ((julong)max_jint * sizeof(double)) ) | |
51 | |
52 | |
53 #define UNSAFE_ENTRY(result_type, header) \ | |
54 JVM_ENTRY(result_type, header) | |
55 | |
56 // Can't use UNSAFE_LEAF because it has the signature of a straight | |
57 // call into the runtime (just like JVM_LEAF, funny that) but it's | |
58 // called like a Java Native and thus the wrapper built for it passes | |
59 // arguments like a JNI call. It expects those arguments to be popped | |
60 // from the stack on Intel like all good JNI args are, and adjusts the | |
61 // stack according. Since the JVM_LEAF call expects no extra | |
62 // arguments the stack isn't popped in the C code, is pushed by the | |
63 // wrapper and we get sick. | |
64 //#define UNSAFE_LEAF(result_type, header) \ | |
65 // JVM_LEAF(result_type, header) | |
66 | |
67 #define UNSAFE_END JVM_END | |
68 | |
69 #define UnsafeWrapper(arg) /*nothing, for the present*/ | |
70 | |
71 | |
72 inline void* addr_from_java(jlong addr) { | |
73 // This assert fails in a variety of ways on 32-bit systems. | |
74 // It is impossible to predict whether native code that converts | |
75 // pointers to longs will sign-extend or zero-extend the addresses. | |
76 //assert(addr == (uintptr_t)addr, "must not be odd high bits"); | |
77 return (void*)(uintptr_t)addr; | |
78 } | |
79 | |
80 inline jlong addr_to_java(void* p) { | |
81 assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); | |
82 return (uintptr_t)p; | |
83 } | |
84 | |
85 | |
86 // Note: The VM's obj_field and related accessors use byte-scaled | |
87 // ("unscaled") offsets, just as the unsafe methods do. | |
88 | |
89 // However, the method Unsafe.fieldOffset explicitly declines to | |
90 // guarantee this. The field offset values manipulated by the Java user | |
91 // through the Unsafe API are opaque cookies that just happen to be byte | |
92 // offsets. We represent this state of affairs by passing the cookies | |
93 // through conversion functions when going between the VM and the Unsafe API. | |
94 // The conversion functions just happen to be no-ops at present. | |
95 | |
96 inline jlong field_offset_to_byte_offset(jlong field_offset) { | |
97 return field_offset; | |
98 } | |
99 | |
100 inline jlong field_offset_from_byte_offset(jlong byte_offset) { | |
101 return byte_offset; | |
102 } | |
103 | |
104 inline jint invocation_key_from_method_slot(jint slot) { | |
105 return slot; | |
106 } | |
107 | |
108 inline jint invocation_key_to_method_slot(jint key) { | |
109 return key; | |
110 } | |
111 | |
112 inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { | |
113 jlong byte_offset = field_offset_to_byte_offset(field_offset); | |
114 #ifdef ASSERT | |
115 if (p != NULL) { | |
116 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
117 if (byte_offset == (jint)byte_offset) { | |
118 void* ptr_plus_disp = (address)p + byte_offset; | |
113
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119 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
0 | 120 "raw [ptr+disp] must be consistent with oop::field_base"); |
121 } | |
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122 jlong p_size = HeapWordSize * (jlong)(p->size()); |
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123 assert(byte_offset < p_size, err_msg("Unsafe access: offset " INT64_FORMAT " > object's size " INT64_FORMAT, byte_offset, p_size)); |
0 | 124 } |
125 #endif | |
126 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
127 return (address)p + (jint) byte_offset; | |
128 else | |
129 return (address)p + byte_offset; | |
130 } | |
131 | |
132 // Externally callable versions: | |
133 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
134 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
135 return field_offset; | |
136 } | |
137 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
138 return byte_offset; | |
139 } | |
140 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
141 return invocation_key_from_method_slot(slot); | |
142 } | |
143 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
144 return invocation_key_to_method_slot(key); | |
145 } | |
146 | |
147 | |
148 ///// Data in the Java heap. | |
149 | |
150 #define GET_FIELD(obj, offset, type_name, v) \ | |
151 oop p = JNIHandles::resolve(obj); \ | |
152 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
153 | |
154 #define SET_FIELD(obj, offset, type_name, x) \ | |
155 oop p = JNIHandles::resolve(obj); \ | |
156 *(type_name*)index_oop_from_field_offset_long(p, offset) = x | |
157 | |
158 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
159 oop p = JNIHandles::resolve(obj); \ | |
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160 volatile type_name v = OrderAccess::load_acquire((volatile type_name*)index_oop_from_field_offset_long(p, offset)); |
0 | 161 |
162 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
163 oop p = JNIHandles::resolve(obj); \ | |
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164 OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), x); |
0 | 165 |
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166 // Macros for oops that check UseCompressedOops |
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167 |
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168 #define GET_OOP_FIELD(obj, offset, v) \ |
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169 oop p = JNIHandles::resolve(obj); \ |
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170 oop v; \ |
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171 if (UseCompressedOops) { \ |
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172 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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173 v = oopDesc::decode_heap_oop(n); \ |
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174 } else { \ |
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175 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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176 } |
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177 |
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178 |
0 | 179 // Get/SetObject must be special-cased, since it works with handles. |
180 | |
181 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
182 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
183 UnsafeWrapper("Unsafe_GetObject"); | |
184 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
113
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185 GET_OOP_FIELD(obj, offset, v) |
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186 jobject ret = JNIHandles::make_local(env, v); |
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187 #if INCLUDE_ALL_GCS |
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188 // We could be accessing the referent field in a reference |
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189 // object. If G1 is enabled then we need to register a non-null |
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190 // referent with the SATB barrier. |
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191 if (UseG1GC) { |
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192 bool needs_barrier = false; |
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193 |
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194 if (ret != NULL) { |
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195 if (offset == java_lang_ref_Reference::referent_offset) { |
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196 oop o = JNIHandles::resolve_non_null(obj); |
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197 Klass* k = o->klass(); |
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198 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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199 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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200 needs_barrier = true; |
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201 } |
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202 } |
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203 } |
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204 |
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205 if (needs_barrier) { |
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206 oop referent = JNIHandles::resolve(ret); |
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207 G1SATBCardTableModRefBS::enqueue(referent); |
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208 } |
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209 } |
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210 #endif // INCLUDE_ALL_GCS |
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211 return ret; |
0 | 212 UNSAFE_END |
213 | |
214 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
215 UnsafeWrapper("Unsafe_SetObject"); | |
216 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
217 oop x = JNIHandles::resolve(x_h); | |
218 //SET_FIELD(obj, offset, oop, x); | |
219 oop p = JNIHandles::resolve(obj); | |
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220 if (UseCompressedOops) { |
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221 if (x != NULL) { |
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222 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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223 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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224 } else { |
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225 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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226 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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227 } |
0 | 228 } else { |
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229 if (x != NULL) { |
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230 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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231 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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232 } else { |
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233 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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234 } |
0 | 235 } |
236 UNSAFE_END | |
237 | |
238 // The normal variants allow a null base pointer with an arbitrary address. | |
239 // But if the base pointer is non-null, the offset should make some sense. | |
240 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
241 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
242 UnsafeWrapper("Unsafe_GetObject"); | |
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243 GET_OOP_FIELD(obj, offset, v) |
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244 jobject ret = JNIHandles::make_local(env, v); |
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245 #if INCLUDE_ALL_GCS |
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246 // We could be accessing the referent field in a reference |
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247 // object. If G1 is enabled then we need to register non-null |
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248 // referent with the SATB barrier. |
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249 if (UseG1GC) { |
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250 bool needs_barrier = false; |
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251 |
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252 if (ret != NULL) { |
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253 if (offset == java_lang_ref_Reference::referent_offset && obj != NULL) { |
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254 oop o = JNIHandles::resolve(obj); |
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255 Klass* k = o->klass(); |
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256 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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257 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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258 needs_barrier = true; |
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259 } |
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260 } |
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261 } |
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262 |
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263 if (needs_barrier) { |
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264 oop referent = JNIHandles::resolve(ret); |
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265 G1SATBCardTableModRefBS::enqueue(referent); |
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266 } |
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267 } |
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268 #endif // INCLUDE_ALL_GCS |
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269 return ret; |
0 | 270 UNSAFE_END |
271 | |
272 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
273 UnsafeWrapper("Unsafe_SetObject"); | |
274 oop x = JNIHandles::resolve(x_h); | |
275 oop p = JNIHandles::resolve(obj); | |
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276 if (UseCompressedOops) { |
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277 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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278 } else { |
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279 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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280 } |
0 | 281 UNSAFE_END |
282 | |
283 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
284 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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285 oop p = JNIHandles::resolve(obj); |
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286 void* addr = index_oop_from_field_offset_long(p, offset); |
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287 volatile oop v; |
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288 if (UseCompressedOops) { |
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289 volatile narrowOop n = *(volatile narrowOop*) addr; |
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290 (void)const_cast<oop&>(v = oopDesc::decode_heap_oop(n)); |
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291 } else { |
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292 (void)const_cast<oop&>(v = *(volatile oop*) addr); |
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293 } |
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294 OrderAccess::acquire(); |
0 | 295 return JNIHandles::make_local(env, v); |
296 UNSAFE_END | |
297 | |
298 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
299 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
300 oop x = JNIHandles::resolve(x_h); | |
301 oop p = JNIHandles::resolve(obj); | |
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302 void* addr = index_oop_from_field_offset_long(p, offset); |
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303 OrderAccess::release(); |
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304 if (UseCompressedOops) { |
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305 oop_store((narrowOop*)addr, x); |
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306 } else { |
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307 oop_store((oop*)addr, x); |
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308 } |
0 | 309 OrderAccess::fence(); |
310 UNSAFE_END | |
311 | |
10235 | 312 #ifndef SUPPORTS_NATIVE_CX8 |
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313 // Keep old code for platforms which may not have atomic jlong (8 bytes) instructions |
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314 |
0 | 315 // Volatile long versions must use locks if !VM_Version::supports_cx8(). |
316 // support_cx8 is a surrogate for 'supports atomic long memory ops'. | |
317 | |
318 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
319 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
320 { | |
321 if (VM_Version::supports_cx8()) { | |
322 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
323 return v; | |
324 } | |
325 else { | |
326 Handle p (THREAD, JNIHandles::resolve(obj)); | |
327 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
328 ObjectLocker ol(p, THREAD); | |
329 jlong value = *addr; | |
330 return value; | |
331 } | |
332 } | |
333 UNSAFE_END | |
334 | |
335 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
336 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
337 { | |
338 if (VM_Version::supports_cx8()) { | |
339 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
340 } | |
341 else { | |
342 Handle p (THREAD, JNIHandles::resolve(obj)); | |
343 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
344 ObjectLocker ol(p, THREAD); | |
345 *addr = x; | |
346 } | |
347 } | |
348 UNSAFE_END | |
349 | |
10235 | 350 #endif // not SUPPORTS_NATIVE_CX8 |
0 | 351 |
352 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
353 \ | |
354 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
355 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
356 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
357 GET_FIELD(obj, offset, jboolean, v); \ | |
358 return v; \ | |
359 UNSAFE_END \ | |
360 \ | |
361 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
362 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
363 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
364 SET_FIELD(obj, offset, jboolean, x); \ | |
365 UNSAFE_END \ | |
366 \ | |
367 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
368 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
369 GET_FIELD(obj, offset, jboolean, v); \ | |
370 return v; \ | |
371 UNSAFE_END \ | |
372 \ | |
373 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
374 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
375 SET_FIELD(obj, offset, jboolean, x); \ | |
376 UNSAFE_END \ | |
377 \ | |
378 // END DEFINE_GETSETOOP. | |
379 | |
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380 DEFINE_GETSETOOP(jboolean, Boolean) |
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381 DEFINE_GETSETOOP(jbyte, Byte) |
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382 DEFINE_GETSETOOP(jshort, Short); |
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383 DEFINE_GETSETOOP(jchar, Char); |
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384 DEFINE_GETSETOOP(jint, Int); |
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385 DEFINE_GETSETOOP(jlong, Long); |
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386 DEFINE_GETSETOOP(jfloat, Float); |
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387 DEFINE_GETSETOOP(jdouble, Double); |
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388 |
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389 #undef DEFINE_GETSETOOP |
0 | 390 |
391 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
392 \ | |
393 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
394 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
395 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
396 return v; \ | |
397 UNSAFE_END \ | |
398 \ | |
399 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
400 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
401 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
402 UNSAFE_END \ | |
403 \ | |
404 // END DEFINE_GETSETOOP_VOLATILE. | |
405 | |
406 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
407 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
408 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
409 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
410 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
411 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
412 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
413 | |
10235 | 414 #ifdef SUPPORTS_NATIVE_CX8 |
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415 DEFINE_GETSETOOP_VOLATILE(jlong, Long); |
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416 #endif |
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417 |
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418 #undef DEFINE_GETSETOOP_VOLATILE |
0 | 419 |
420 // The non-intrinsified versions of setOrdered just use setVolatile | |
421 | |
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422 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) |
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423 UnsafeWrapper("Unsafe_SetOrderedInt"); |
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424 SET_FIELD_VOLATILE(obj, offset, jint, x); |
0 | 425 UNSAFE_END |
426 | |
427 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
428 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
429 oop x = JNIHandles::resolve(x_h); | |
430 oop p = JNIHandles::resolve(obj); | |
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431 void* addr = index_oop_from_field_offset_long(p, offset); |
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432 OrderAccess::release(); |
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433 if (UseCompressedOops) { |
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434 oop_store((narrowOop*)addr, x); |
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435 } else { |
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436 oop_store((oop*)addr, x); |
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437 } |
0 | 438 OrderAccess::fence(); |
439 UNSAFE_END | |
440 | |
441 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
442 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
10235 | 443 #ifdef SUPPORTS_NATIVE_CX8 |
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444 SET_FIELD_VOLATILE(obj, offset, jlong, x); |
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445 #else |
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446 // Keep old code for platforms which may not have atomic long (8 bytes) instructions |
0 | 447 { |
448 if (VM_Version::supports_cx8()) { | |
449 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
450 } | |
451 else { | |
452 Handle p (THREAD, JNIHandles::resolve(obj)); | |
453 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
454 ObjectLocker ol(p, THREAD); | |
455 *addr = x; | |
456 } | |
457 } | |
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458 #endif |
0 | 459 UNSAFE_END |
460 | |
7425 | 461 UNSAFE_ENTRY(void, Unsafe_LoadFence(JNIEnv *env, jobject unsafe)) |
462 UnsafeWrapper("Unsafe_LoadFence"); | |
463 OrderAccess::acquire(); | |
464 UNSAFE_END | |
465 | |
466 UNSAFE_ENTRY(void, Unsafe_StoreFence(JNIEnv *env, jobject unsafe)) | |
467 UnsafeWrapper("Unsafe_StoreFence"); | |
468 OrderAccess::release(); | |
469 UNSAFE_END | |
470 | |
471 UNSAFE_ENTRY(void, Unsafe_FullFence(JNIEnv *env, jobject unsafe)) | |
472 UnsafeWrapper("Unsafe_FullFence"); | |
473 OrderAccess::fence(); | |
474 UNSAFE_END | |
475 | |
0 | 476 ////// Data in the C heap. |
477 | |
478 // Note: These do not throw NullPointerException for bad pointers. | |
479 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
480 // | |
481 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
482 \ | |
483 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
484 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
485 void* p = addr_from_java(addr); \ | |
486 JavaThread* t = JavaThread::current(); \ | |
487 t->set_doing_unsafe_access(true); \ | |
488 java_type x = *(volatile native_type*)p; \ | |
489 t->set_doing_unsafe_access(false); \ | |
490 return x; \ | |
491 UNSAFE_END \ | |
492 \ | |
493 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
494 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
495 JavaThread* t = JavaThread::current(); \ | |
496 t->set_doing_unsafe_access(true); \ | |
497 void* p = addr_from_java(addr); \ | |
498 *(volatile native_type*)p = x; \ | |
499 t->set_doing_unsafe_access(false); \ | |
500 UNSAFE_END \ | |
501 \ | |
502 // END DEFINE_GETSETNATIVE. | |
503 | |
504 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
505 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
506 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
507 DEFINE_GETSETNATIVE(jint, Int, jint); | |
508 // no long -- handled specially | |
509 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
510 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
511 | |
512 #undef DEFINE_GETSETNATIVE | |
513 | |
514 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
515 UnsafeWrapper("Unsafe_GetNativeLong"); | |
516 JavaThread* t = JavaThread::current(); | |
517 // We do it this way to avoid problems with access to heap using 64 | |
518 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
519 // some CPUs (SPARC) it leads to SIGBUS. | |
520 t->set_doing_unsafe_access(true); | |
521 void* p = addr_from_java(addr); | |
522 jlong x; | |
523 if (((intptr_t)p & 7) == 0) { | |
524 // jlong is aligned, do a volatile access | |
525 x = *(volatile jlong*)p; | |
526 } else { | |
527 jlong_accessor acc; | |
528 acc.words[0] = ((volatile jint*)p)[0]; | |
529 acc.words[1] = ((volatile jint*)p)[1]; | |
530 x = acc.long_value; | |
531 } | |
532 t->set_doing_unsafe_access(false); | |
533 return x; | |
534 UNSAFE_END | |
535 | |
536 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
537 UnsafeWrapper("Unsafe_SetNativeLong"); | |
538 JavaThread* t = JavaThread::current(); | |
539 // see comment for Unsafe_GetNativeLong | |
540 t->set_doing_unsafe_access(true); | |
541 void* p = addr_from_java(addr); | |
542 if (((intptr_t)p & 7) == 0) { | |
543 // jlong is aligned, do a volatile access | |
544 *(volatile jlong*)p = x; | |
545 } else { | |
546 jlong_accessor acc; | |
547 acc.long_value = x; | |
548 ((volatile jint*)p)[0] = acc.words[0]; | |
549 ((volatile jint*)p)[1] = acc.words[1]; | |
550 } | |
551 t->set_doing_unsafe_access(false); | |
552 UNSAFE_END | |
553 | |
554 | |
555 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
556 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
557 void* p = addr_from_java(addr); | |
558 return addr_to_java(*(void**)p); | |
559 UNSAFE_END | |
560 | |
561 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
562 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
563 void* p = addr_from_java(addr); | |
564 *(void**)p = addr_from_java(x); | |
565 UNSAFE_END | |
566 | |
567 | |
568 ////// Allocation requests | |
569 | |
570 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
571 UnsafeWrapper("Unsafe_AllocateInstance"); | |
572 { | |
573 ThreadToNativeFromVM ttnfv(thread); | |
574 return env->AllocObject(cls); | |
575 } | |
576 UNSAFE_END | |
577 | |
578 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
579 UnsafeWrapper("Unsafe_AllocateMemory"); | |
580 size_t sz = (size_t)size; | |
581 if (sz != (julong)size || size < 0) { | |
582 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
583 } | |
584 if (sz == 0) { | |
585 return 0; | |
586 } | |
587 sz = round_to(sz, HeapWordSize); | |
6197 | 588 void* x = os::malloc(sz, mtInternal); |
0 | 589 if (x == NULL) { |
590 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
591 } | |
592 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
593 return addr_to_java(x); | |
594 UNSAFE_END | |
595 | |
596 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
597 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
598 void* p = addr_from_java(addr); | |
599 size_t sz = (size_t)size; | |
600 if (sz != (julong)size || size < 0) { | |
601 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
602 } | |
603 if (sz == 0) { | |
604 os::free(p); | |
605 return 0; | |
606 } | |
607 sz = round_to(sz, HeapWordSize); | |
6197 | 608 void* x = (p == NULL) ? os::malloc(sz, mtInternal) : os::realloc(p, sz, mtInternal); |
0 | 609 if (x == NULL) { |
610 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
611 } | |
612 return addr_to_java(x); | |
613 UNSAFE_END | |
614 | |
615 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
616 UnsafeWrapper("Unsafe_FreeMemory"); | |
617 void* p = addr_from_java(addr); | |
618 if (p == NULL) { | |
619 return; | |
620 } | |
621 os::free(p); | |
622 UNSAFE_END | |
623 | |
624 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
625 UnsafeWrapper("Unsafe_SetMemory"); | |
626 size_t sz = (size_t)size; | |
627 if (sz != (julong)size || size < 0) { | |
628 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
629 } | |
630 char* p = (char*) addr_from_java(addr); | |
631 Copy::fill_to_memory_atomic(p, sz, value); | |
632 UNSAFE_END | |
633 | |
634 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
635 UnsafeWrapper("Unsafe_SetMemory"); | |
636 size_t sz = (size_t)size; | |
637 if (sz != (julong)size || size < 0) { | |
638 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
639 } | |
640 oop base = JNIHandles::resolve(obj); | |
641 void* p = index_oop_from_field_offset_long(base, offset); | |
642 Copy::fill_to_memory_atomic(p, sz, value); | |
643 UNSAFE_END | |
644 | |
645 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
646 UnsafeWrapper("Unsafe_CopyMemory"); | |
647 if (size == 0) { | |
648 return; | |
649 } | |
650 size_t sz = (size_t)size; | |
651 if (sz != (julong)size || size < 0) { | |
652 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
653 } | |
654 void* src = addr_from_java(srcAddr); | |
655 void* dst = addr_from_java(dstAddr); | |
656 Copy::conjoint_memory_atomic(src, dst, sz); | |
657 UNSAFE_END | |
658 | |
659 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
660 UnsafeWrapper("Unsafe_CopyMemory"); | |
661 if (size == 0) { | |
662 return; | |
663 } | |
664 size_t sz = (size_t)size; | |
665 if (sz != (julong)size || size < 0) { | |
666 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
667 } | |
668 oop srcp = JNIHandles::resolve(srcObj); | |
669 oop dstp = JNIHandles::resolve(dstObj); | |
670 if (dstp != NULL && !dstp->is_typeArray()) { | |
671 // NYI: This works only for non-oop arrays at present. | |
672 // Generalizing it would be reasonable, but requires card marking. | |
673 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
674 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
675 } | |
676 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
677 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
678 Copy::conjoint_memory_atomic(src, dst, sz); | |
679 UNSAFE_END | |
680 | |
681 | |
682 ////// Random queries | |
683 | |
684 // See comment at file start about UNSAFE_LEAF | |
685 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
686 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
687 UnsafeWrapper("Unsafe_AddressSize"); | |
688 return sizeof(void*); | |
689 UNSAFE_END | |
690 | |
691 // See comment at file start about UNSAFE_LEAF | |
692 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
693 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
694 UnsafeWrapper("Unsafe_PageSize"); | |
695 return os::vm_page_size(); | |
696 UNSAFE_END | |
697 | |
698 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
699 if (field == NULL) { | |
700 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
701 } | |
702 | |
703 oop reflected = JNIHandles::resolve_non_null(field); | |
704 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
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705 Klass* k = java_lang_Class::as_Klass(mirror); |
0 | 706 int slot = java_lang_reflect_Field::slot(reflected); |
707 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
708 | |
709 if (must_be_static >= 0) { | |
710 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
711 if (must_be_static != really_is_static) { | |
712 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
713 } | |
714 } | |
715 | |
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716 int offset = InstanceKlass::cast(k)->field_offset(slot); |
0 | 717 return field_offset_from_byte_offset(offset); |
718 } | |
719 | |
720 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
721 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
722 return find_field_offset(field, 0, THREAD); | |
723 UNSAFE_END | |
724 | |
725 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
726 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
727 return find_field_offset(field, 1, THREAD); | |
728 UNSAFE_END | |
729 | |
730 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
731 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
732 // Note: In this VM implementation, a field address is always a short | |
733 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
734 // range of the return type is never used. However, some implementations | |
735 // might put the static field inside an array shared by many classes, | |
736 // or even at a fixed address, in which case the address could be quite | |
737 // large. In that last case, this function would return NULL, since | |
738 // the address would operate alone, without any base pointer. | |
739 | |
740 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
741 | |
742 oop reflected = JNIHandles::resolve_non_null(field); | |
743 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
744 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
745 | |
746 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
747 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
748 } | |
749 | |
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750 return JNIHandles::make_local(env, mirror); |
0 | 751 UNSAFE_END |
752 | |
753 //@deprecated | |
754 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
755 UnsafeWrapper("Unsafe_FieldOffset"); | |
756 // tries (but fails) to be polymorphic between static and non-static: | |
757 jlong offset = find_field_offset(field, -1, THREAD); | |
758 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
759 return (jint)offset; | |
760 UNSAFE_END | |
761 | |
762 //@deprecated | |
763 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
764 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
765 if (clazz == NULL) { | |
766 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
767 } | |
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768 return JNIHandles::make_local(env, JNIHandles::resolve_non_null(clazz)); |
0 | 769 UNSAFE_END |
770 | |
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771 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
0 | 772 UnsafeWrapper("Unsafe_EnsureClassInitialized"); |
773 if (clazz == NULL) { | |
774 THROW(vmSymbols::java_lang_NullPointerException()); | |
775 } | |
776 oop mirror = JNIHandles::resolve_non_null(clazz); | |
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777 |
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778 Klass* klass = java_lang_Class::as_Klass(mirror); |
6983 | 779 if (klass != NULL && klass->should_be_initialized()) { |
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780 InstanceKlass* k = InstanceKlass::cast(klass); |
0 | 781 k->initialize(CHECK); |
782 } | |
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783 } |
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784 UNSAFE_END |
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785 |
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786 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
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787 UnsafeWrapper("Unsafe_ShouldBeInitialized"); |
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788 if (clazz == NULL) { |
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789 THROW_(vmSymbols::java_lang_NullPointerException(), false); |
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790 } |
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791 oop mirror = JNIHandles::resolve_non_null(clazz); |
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792 Klass* klass = java_lang_Class::as_Klass(mirror); |
6983 | 793 if (klass != NULL && klass->should_be_initialized()) { |
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794 return true; |
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795 } |
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796 return false; |
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797 } |
0 | 798 UNSAFE_END |
799 | |
800 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
801 if (acls == NULL) { | |
802 THROW(vmSymbols::java_lang_NullPointerException()); | |
803 } | |
804 oop mirror = JNIHandles::resolve_non_null(acls); | |
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805 Klass* k = java_lang_Class::as_Klass(mirror); |
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806 if (k == NULL || !k->oop_is_array()) { |
0 | 807 THROW(vmSymbols::java_lang_InvalidClassException()); |
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808 } else if (k->oop_is_objArray()) { |
0 | 809 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); |
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810 scale = heapOopSize; |
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811 } else if (k->oop_is_typeArray()) { |
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812 TypeArrayKlass* tak = TypeArrayKlass::cast(k); |
0 | 813 base = tak->array_header_in_bytes(); |
814 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
815 scale = (1 << tak->log2_element_size()); | |
816 } else { | |
817 ShouldNotReachHere(); | |
818 } | |
819 } | |
820 | |
821 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
822 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
823 int base, scale; | |
824 getBaseAndScale(base, scale, acls, CHECK_0); | |
825 return field_offset_from_byte_offset(base); | |
826 UNSAFE_END | |
827 | |
828 | |
829 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
830 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
831 int base, scale; | |
832 getBaseAndScale(base, scale, acls, CHECK_0); | |
833 // This VM packs both fields and array elements down to the byte. | |
834 // But watch out: If this changes, so that array references for | |
835 // a given primitive type (say, T_BOOLEAN) use different memory units | |
836 // than fields, this method MUST return zero for such arrays. | |
837 // For example, the VM used to store sub-word sized fields in full | |
838 // words in the object layout, so that accessors like getByte(Object,int) | |
839 // did not really do what one might expect for arrays. Therefore, | |
840 // this function used to report a zero scale factor, so that the user | |
841 // would know not to attempt to access sub-word array elements. | |
842 // // Code for unpacked fields: | |
843 // if (scale < wordSize) return 0; | |
844 | |
845 // The following allows for a pretty general fieldOffset cookie scheme, | |
846 // but requires it to be linear in byte offset. | |
847 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
848 UNSAFE_END | |
849 | |
850 | |
851 static inline void throw_new(JNIEnv *env, const char *ename) { | |
852 char buf[100]; | |
853 strcpy(buf, "java/lang/"); | |
854 strcat(buf, ename); | |
855 jclass cls = env->FindClass(buf); | |
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856 if (env->ExceptionCheck()) { |
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857 env->ExceptionClear(); |
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858 tty->print_cr("Unsafe: cannot throw %s because FindClass has failed", buf); |
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859 return; |
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860 } |
0 | 861 char* msg = NULL; |
862 env->ThrowNew(cls, msg); | |
863 } | |
864 | |
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865 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { |
0 | 866 { |
867 // Code lifted from JDK 1.3 ClassLoader.c | |
868 | |
869 jbyte *body; | |
870 char *utfName; | |
871 jclass result = 0; | |
872 char buf[128]; | |
873 | |
874 if (UsePerfData) { | |
875 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
876 } | |
877 | |
878 if (data == NULL) { | |
879 throw_new(env, "NullPointerException"); | |
880 return 0; | |
881 } | |
882 | |
883 /* Work around 4153825. malloc crashes on Solaris when passed a | |
884 * negative size. | |
885 */ | |
886 if (length < 0) { | |
887 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
888 return 0; | |
889 } | |
890 | |
6197 | 891 body = NEW_C_HEAP_ARRAY(jbyte, length, mtInternal); |
0 | 892 |
893 if (body == 0) { | |
894 throw_new(env, "OutOfMemoryError"); | |
895 return 0; | |
896 } | |
897 | |
898 env->GetByteArrayRegion(data, offset, length, body); | |
899 | |
900 if (env->ExceptionOccurred()) | |
901 goto free_body; | |
902 | |
903 if (name != NULL) { | |
904 uint len = env->GetStringUTFLength(name); | |
905 int unicode_len = env->GetStringLength(name); | |
906 if (len >= sizeof(buf)) { | |
6197 | 907 utfName = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); |
0 | 908 if (utfName == NULL) { |
909 throw_new(env, "OutOfMemoryError"); | |
910 goto free_body; | |
911 } | |
912 } else { | |
913 utfName = buf; | |
914 } | |
915 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
916 //VerifyFixClassname(utfName); | |
917 for (uint i = 0; i < len; i++) { | |
918 if (utfName[i] == '.') utfName[i] = '/'; | |
919 } | |
920 } else { | |
921 utfName = NULL; | |
922 } | |
923 | |
924 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
925 | |
926 if (utfName && utfName != buf) | |
6197 | 927 FREE_C_HEAP_ARRAY(char, utfName, mtInternal); |
0 | 928 |
929 free_body: | |
6197 | 930 FREE_C_HEAP_ARRAY(jbyte, body, mtInternal); |
0 | 931 return result; |
932 } | |
933 } | |
934 | |
935 | |
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936 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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937 UnsafeWrapper("Unsafe_DefineClass"); |
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938 { |
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939 ThreadToNativeFromVM ttnfv(thread); |
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940 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
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941 } |
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942 UNSAFE_END |
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943 |
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944 |
0 | 945 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) |
946 UnsafeWrapper("Unsafe_DefineClass"); | |
947 { | |
948 ThreadToNativeFromVM ttnfv(thread); | |
949 | |
950 int depthFromDefineClass0 = 1; | |
951 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
952 jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller); | |
953 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); | |
954 | |
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955 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
0 | 956 } |
957 UNSAFE_END | |
958 | |
959 | |
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960 #define DAC_Args CLS"[B["OBJ |
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961 // define a class but do not make it known to the class loader or system dictionary |
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962 // - host_class: supplies context for linkage, access control, protection domain, and class loader |
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963 // - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
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964 // - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
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965 |
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966 // When you load an anonymous class U, it works as if you changed its name just before loading, |
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967 // to a name that you will never use again. Since the name is lost, no other class can directly |
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968 // link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
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969 // through java.lang.Class methods like Class.newInstance. |
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970 |
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971 // Access checks for linkage sites within U continue to follow the same rules as for named classes. |
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972 // The package of an anonymous class is given by the package qualifier on the name under which it was loaded. |
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973 // An anonymous class also has special privileges to access any member of its host class. |
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974 // This is the main reason why this loading operation is unsafe. The purpose of this is to |
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975 // allow language implementations to simulate "open classes"; a host class in effect gets |
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976 // new code when an anonymous class is loaded alongside it. A less convenient but more |
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977 // standard way to do this is with reflection, which can also be set to ignore access |
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978 // restrictions. |
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979 |
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980 // Access into an anonymous class is possible only through reflection. Therefore, there |
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981 // are no special access rules for calling into an anonymous class. The relaxed access |
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982 // rule for the host class is applied in the opposite direction: A host class reflectively |
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983 // access one of its anonymous classes. |
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984 |
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985 // If you load the same bytecodes twice, you get two different classes. You can reload |
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986 // the same bytecodes with or without varying CP patches. |
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987 |
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988 // By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
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989 // The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
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990 // The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
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991 |
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992 // This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
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993 // an outer class (so that U2 is an anonymous inner class of anonymous U1). |
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994 // It is not possible for a named class, or an older anonymous class, to refer by |
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995 // name (via its CP) to a newer anonymous class. |
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996 |
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997 // CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
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998 // or type descriptors used in the loaded anonymous class. |
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999 |
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1000 // Finally, CP patching may be used to introduce "live" objects into the constant pool, |
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1001 // instead of "dead" strings. A compiled statement like println((Object)"hello") can |
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1002 // be changed to println(greeting), where greeting is an arbitrary object created before |
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1003 // the anonymous class is loaded. This is useful in dynamic languages, in which |
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1004 // various kinds of metaobjects must be introduced as constants into bytecode. |
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1005 // Note the cast (Object), which tells the verifier to expect an arbitrary object, |
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1006 // not just a literal string. For such ldc instructions, the verifier uses the |
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1007 // type Object instead of String, if the loaded constant is not in fact a String. |
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1008 |
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1009 static instanceKlassHandle |
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1010 Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
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1011 jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
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1012 HeapWord* *temp_alloc, |
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1013 TRAPS) { |
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1014 |
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1015 if (UsePerfData) { |
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1016 ClassLoader::unsafe_defineClassCallCounter()->inc(); |
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1017 } |
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1018 |
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1019 if (data == NULL) { |
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1020 THROW_0(vmSymbols::java_lang_NullPointerException()); |
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1021 } |
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1022 |
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1023 jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
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1024 jint word_length = (length + sizeof(HeapWord)-1) / sizeof(HeapWord); |
6197 | 1025 HeapWord* body = NEW_C_HEAP_ARRAY(HeapWord, word_length, mtInternal); |
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1026 if (body == NULL) { |
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1027 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
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1028 } |
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1029 |
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1030 // caller responsible to free it: |
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1031 (*temp_alloc) = body; |
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1032 |
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1033 { |
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1034 jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
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1035 Copy::conjoint_words((HeapWord*) array_base, body, word_length); |
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1036 } |
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1037 |
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1038 u1* class_bytes = (u1*) body; |
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1039 int class_bytes_length = (int) length; |
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1040 if (class_bytes_length < 0) class_bytes_length = 0; |
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1041 if (class_bytes == NULL |
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1042 || host_class == NULL |
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1043 || length != class_bytes_length) |
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1044 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1045 |
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1046 objArrayHandle cp_patches_h; |
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1047 if (cp_patches_jh != NULL) { |
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1048 oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
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1049 if (!p->is_objArray()) |
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1050 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1051 cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
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1052 } |
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1053 |
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1054 KlassHandle host_klass(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(host_class))); |
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1055 const char* host_source = host_klass->external_name(); |
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1056 Handle host_loader(THREAD, host_klass->class_loader()); |
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1057 Handle host_domain(THREAD, host_klass->protection_domain()); |
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1058 |
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1059 GrowableArray<Handle>* cp_patches = NULL; |
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1060 if (cp_patches_h.not_null()) { |
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1061 int alen = cp_patches_h->length(); |
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1062 for (int i = alen-1; i >= 0; i--) { |
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1063 oop p = cp_patches_h->obj_at(i); |
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1064 if (p != NULL) { |
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1065 Handle patch(THREAD, p); |
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1066 if (cp_patches == NULL) |
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1067 cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
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1068 cp_patches->at_put(i, patch); |
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1069 } |
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1070 } |
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1071 } |
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1072 |
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1073 ClassFileStream st(class_bytes, class_bytes_length, (char*) host_source); |
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1074 |
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1075 instanceKlassHandle anon_klass; |
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1076 { |
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1077 Symbol* no_class_name = NULL; |
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1078 Klass* anonk = SystemDictionary::parse_stream(no_class_name, |
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1079 host_loader, host_domain, |
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1080 &st, host_klass, cp_patches, |
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1081 CHECK_NULL); |
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1082 if (anonk == NULL) return NULL; |
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1083 anon_klass = instanceKlassHandle(THREAD, anonk); |
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1084 } |
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1085 |
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1086 return anon_klass; |
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1087 } |
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1088 |
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1089 UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) |
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1090 { |
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1091 instanceKlassHandle anon_klass; |
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1092 jobject res_jh = NULL; |
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1093 |
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1094 UnsafeWrapper("Unsafe_DefineAnonymousClass"); |
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1095 ResourceMark rm(THREAD); |
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1096 |
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1097 HeapWord* temp_alloc = NULL; |
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1098 |
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1099 anon_klass = Unsafe_DefineAnonymousClass_impl(env, host_class, data, |
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1100 cp_patches_jh, |
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1101 &temp_alloc, THREAD); |
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1102 if (anon_klass() != NULL) |
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1103 res_jh = JNIHandles::make_local(env, anon_klass->java_mirror()); |
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1104 |
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1105 // try/finally clause: |
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1106 if (temp_alloc != NULL) { |
6197 | 1107 FREE_C_HEAP_ARRAY(HeapWord, temp_alloc, mtInternal); |
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1108 } |
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1109 |
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1110 // The anonymous class loader data has been artificially been kept alive to |
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1111 // this point. The mirror and any instances of this class have to keep |
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1112 // it alive afterwards. |
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1113 if (anon_klass() != NULL) { |
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1114 anon_klass->class_loader_data()->set_keep_alive(false); |
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1115 } |
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1116 |
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1117 // let caller initialize it as needed... |
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1118 |
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1119 return (jclass) res_jh; |
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1120 } |
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1121 UNSAFE_END |
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1122 |
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1123 |
0 | 1124 |
1125 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1126 UnsafeWrapper("Unsafe_MonitorEnter"); | |
1127 { | |
1128 if (jobj == NULL) { | |
1129 THROW(vmSymbols::java_lang_NullPointerException()); | |
1130 } | |
1131 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1132 ObjectSynchronizer::jni_enter(obj, CHECK); | |
1133 } | |
1134 UNSAFE_END | |
1135 | |
1136 | |
1137 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1138 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
1139 { | |
1140 if (jobj == NULL) { | |
1141 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
1142 } | |
1143 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1144 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
1145 return (res ? JNI_TRUE : JNI_FALSE); | |
1146 } | |
1147 UNSAFE_END | |
1148 | |
1149 | |
1150 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1151 UnsafeWrapper("Unsafe_MonitorExit"); | |
1152 { | |
1153 if (jobj == NULL) { | |
1154 THROW(vmSymbols::java_lang_NullPointerException()); | |
1155 } | |
1156 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
1157 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
1158 } | |
1159 UNSAFE_END | |
1160 | |
1161 | |
1162 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
1163 UnsafeWrapper("Unsafe_ThrowException"); | |
1164 { | |
1165 ThreadToNativeFromVM ttnfv(thread); | |
1166 env->Throw(thr); | |
1167 } | |
1168 UNSAFE_END | |
1169 | |
1170 // JSR166 ------------------------------------------------------------------ | |
1171 | |
1172 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
1173 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
1174 oop x = JNIHandles::resolve(x_h); | |
1175 oop e = JNIHandles::resolve(e_h); | |
1176 oop p = JNIHandles::resolve(obj); | |
113
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1177 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
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1178 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e, true); |
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1179 jboolean success = (res == e); |
0 | 1180 if (success) |
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1181 update_barrier_set((void*)addr, x); |
0 | 1182 return success; |
1183 UNSAFE_END | |
1184 | |
1185 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
1186 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
1187 oop p = JNIHandles::resolve(obj); | |
1188 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
1189 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
1190 UNSAFE_END | |
1191 | |
1192 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
1193 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
1194 Handle p (THREAD, JNIHandles::resolve(obj)); | |
1195 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
1196 if (VM_Version::supports_cx8()) | |
1197 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
1198 else { | |
1199 jboolean success = false; | |
1200 ObjectLocker ol(p, THREAD); | |
1201 if (*addr == e) { *addr = x; success = true; } | |
1202 return success; | |
1203 } | |
1204 UNSAFE_END | |
1205 | |
1206 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
1207 UnsafeWrapper("Unsafe_Park"); | |
10405 | 1208 EventThreadPark event; |
14380 | 1209 HOTSPOT_THREAD_PARK_BEGIN((uintptr_t) thread->parker(), (int) isAbsolute, time); |
1210 | |
0 | 1211 JavaThreadParkedState jtps(thread, time != 0); |
1212 thread->parker()->park(isAbsolute != 0, time); | |
14380 | 1213 |
1214 HOTSPOT_THREAD_PARK_END((uintptr_t) thread->parker()); | |
10405 | 1215 if (event.should_commit()) { |
1216 oop obj = thread->current_park_blocker(); | |
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1217 event.set_klass((obj != NULL) ? obj->klass() : NULL); |
10405 | 1218 event.set_timeout(time); |
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1219 event.set_address((obj != NULL) ? (TYPE_ADDRESS) cast_from_oop<uintptr_t>(obj) : 0); |
10405 | 1220 event.commit(); |
1221 } | |
0 | 1222 UNSAFE_END |
1223 | |
1224 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
1225 UnsafeWrapper("Unsafe_Unpark"); | |
1226 Parker* p = NULL; | |
1227 if (jthread != NULL) { | |
1228 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
1229 if (java_thread != NULL) { | |
1230 jlong lp = java_lang_Thread::park_event(java_thread); | |
1231 if (lp != 0) { | |
1232 // This cast is OK even though the jlong might have been read | |
1233 // non-atomically on 32bit systems, since there, one word will | |
1234 // always be zero anyway and the value set is always the same | |
1235 p = (Parker*)addr_from_java(lp); | |
1236 } else { | |
1237 // Grab lock if apparently null or using older version of library | |
1238 MutexLocker mu(Threads_lock); | |
1239 java_thread = JNIHandles::resolve_non_null(jthread); | |
1240 if (java_thread != NULL) { | |
1241 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
1242 if (thr != NULL) { | |
1243 p = thr->parker(); | |
1244 if (p != NULL) { // Bind to Java thread for next time. | |
1245 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
1246 } | |
1247 } | |
1248 } | |
1249 } | |
1250 } | |
1251 } | |
1252 if (p != NULL) { | |
14380 | 1253 HOTSPOT_THREAD_UNPARK((uintptr_t) p); |
0 | 1254 p->unpark(); |
1255 } | |
1256 UNSAFE_END | |
1257 | |
1258 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
1259 UnsafeWrapper("Unsafe_Loadavg"); | |
1260 const int max_nelem = 3; | |
1261 double la[max_nelem]; | |
1262 jint ret; | |
1263 | |
1264 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
1265 assert(a->is_typeArray(), "must be type array"); | |
1266 | |
1267 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
1268 ThreadToNativeFromVM ttnfv(thread); | |
1269 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
1270 return -1; | |
1271 } | |
1272 | |
1273 ret = os::loadavg(la, nelem); | |
1274 if (ret == -1) return -1; | |
1275 | |
1276 // if successful, ret is the number of samples actually retrieved. | |
1277 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
1278 switch(ret) { | |
1279 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
1280 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
1281 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
1282 } | |
1283 return ret; | |
1284 UNSAFE_END | |
1285 | |
1286 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1287 UnsafeWrapper("Unsafe_PrefetchRead"); | |
1288 oop p = JNIHandles::resolve(obj); | |
1289 void* addr = index_oop_from_field_offset_long(p, 0); | |
1290 Prefetch::read(addr, (intx)offset); | |
1291 UNSAFE_END | |
1292 | |
1293 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1294 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
1295 oop p = JNIHandles::resolve(obj); | |
1296 void* addr = index_oop_from_field_offset_long(p, 0); | |
1297 Prefetch::write(addr, (intx)offset); | |
1298 UNSAFE_END | |
1299 | |
1300 | |
1301 /// JVM_RegisterUnsafeMethods | |
1302 | |
1303 #define ADR "J" | |
1304 | |
1305 #define LANG "Ljava/lang/" | |
1306 | |
1307 #define OBJ LANG"Object;" | |
1308 #define CLS LANG"Class;" | |
1309 #define CTR LANG"reflect/Constructor;" | |
1310 #define FLD LANG"reflect/Field;" | |
1311 #define MTH LANG"reflect/Method;" | |
1312 #define THR LANG"Throwable;" | |
1313 | |
1314 #define DC0_Args LANG"String;[BII" | |
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1315 #define DC_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" |
0 | 1316 |
1317 #define CC (char*) /*cast a literal from (const char*)*/ | |
1318 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
1319 | |
1320 // define deprecated accessors for compabitility with 1.4.0 | |
1321 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
1322 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
1323 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
1324 | |
1325 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
1326 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
1327 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1328 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
1329 | |
1330 // Note: In 1.5.0, there are volatile versions too | |
1331 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
1332 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1333 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
1334 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
1335 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
1336 | |
1337 | |
1338 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
1339 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
1340 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
1341 | |
1342 | |
1343 | |
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1344 // These are the methods for 1.4.0 |
0 | 1345 static JNINativeMethod methods_140[] = { |
1346 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
1347 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
1348 | |
1349 DECLARE_GETSETOOP_140(Boolean, Z), | |
1350 DECLARE_GETSETOOP_140(Byte, B), | |
1351 DECLARE_GETSETOOP_140(Short, S), | |
1352 DECLARE_GETSETOOP_140(Char, C), | |
1353 DECLARE_GETSETOOP_140(Int, I), | |
1354 DECLARE_GETSETOOP_140(Long, J), | |
1355 DECLARE_GETSETOOP_140(Float, F), | |
1356 DECLARE_GETSETOOP_140(Double, D), | |
1357 | |
1358 DECLARE_GETSETNATIVE(Byte, B), | |
1359 DECLARE_GETSETNATIVE(Short, S), | |
1360 DECLARE_GETSETNATIVE(Char, C), | |
1361 DECLARE_GETSETNATIVE(Int, I), | |
1362 DECLARE_GETSETNATIVE(Long, J), | |
1363 DECLARE_GETSETNATIVE(Float, F), | |
1364 DECLARE_GETSETNATIVE(Double, D), | |
1365 | |
1366 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1367 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1368 | |
1369 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1370 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1371 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1372 | |
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1373 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, |
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1374 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, |
0 | 1375 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
1376 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1377 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1378 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1379 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1380 | |
1381 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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|
1382 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1383 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1384 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1385 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1386 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1387 }; | |
1388 | |
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1389 // These are the methods prior to the JSR 166 changes in 1.5.0 |
0 | 1390 static JNINativeMethod methods_141[] = { |
1391 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1392 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1393 | |
1394 DECLARE_GETSETOOP_141(Boolean, Z), | |
1395 DECLARE_GETSETOOP_141(Byte, B), | |
1396 DECLARE_GETSETOOP_141(Short, S), | |
1397 DECLARE_GETSETOOP_141(Char, C), | |
1398 DECLARE_GETSETOOP_141(Int, I), | |
1399 DECLARE_GETSETOOP_141(Long, J), | |
1400 DECLARE_GETSETOOP_141(Float, F), | |
1401 DECLARE_GETSETOOP_141(Double, D), | |
1402 | |
1403 DECLARE_GETSETNATIVE(Byte, B), | |
1404 DECLARE_GETSETNATIVE(Short, S), | |
1405 DECLARE_GETSETNATIVE(Char, C), | |
1406 DECLARE_GETSETNATIVE(Int, I), | |
1407 DECLARE_GETSETNATIVE(Long, J), | |
1408 DECLARE_GETSETNATIVE(Float, F), | |
1409 DECLARE_GETSETNATIVE(Double, D), | |
1410 | |
1411 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1412 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1413 | |
1414 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1415 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1416 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1417 | |
1418 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1419 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1420 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1421 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1422 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1423 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1424 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1425 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1426 | |
1427 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1428 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1429 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1430 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1431 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1432 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1433 | |
1434 }; | |
1435 | |
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1436 // These are the methods prior to the JSR 166 changes in 1.6.0 |
0 | 1437 static JNINativeMethod methods_15[] = { |
1438 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1439 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1440 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1441 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1442 | |
1443 | |
1444 DECLARE_GETSETOOP(Boolean, Z), | |
1445 DECLARE_GETSETOOP(Byte, B), | |
1446 DECLARE_GETSETOOP(Short, S), | |
1447 DECLARE_GETSETOOP(Char, C), | |
1448 DECLARE_GETSETOOP(Int, I), | |
1449 DECLARE_GETSETOOP(Long, J), | |
1450 DECLARE_GETSETOOP(Float, F), | |
1451 DECLARE_GETSETOOP(Double, D), | |
1452 | |
1453 DECLARE_GETSETNATIVE(Byte, B), | |
1454 DECLARE_GETSETNATIVE(Short, S), | |
1455 DECLARE_GETSETNATIVE(Char, C), | |
1456 DECLARE_GETSETNATIVE(Int, I), | |
1457 DECLARE_GETSETNATIVE(Long, J), | |
1458 DECLARE_GETSETNATIVE(Float, F), | |
1459 DECLARE_GETSETNATIVE(Double, D), | |
1460 | |
1461 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1462 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1463 | |
1464 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1465 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1466 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1467 | |
1468 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1469 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1470 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1471 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1472 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1473 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1474 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1475 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1476 | |
1477 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1478 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1479 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1480 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1481 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1482 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1483 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1484 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1485 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1486 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1487 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1488 | |
1489 }; | |
1490 | |
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1491 // These are the methods for 1.6.0 and 1.7.0 |
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1492 static JNINativeMethod methods_16[] = { |
0 | 1493 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
1494 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1495 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1496 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1497 | |
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1498 DECLARE_GETSETOOP(Boolean, Z), |
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1499 DECLARE_GETSETOOP(Byte, B), |
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1500 DECLARE_GETSETOOP(Short, S), |
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1501 DECLARE_GETSETOOP(Char, C), |
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1502 DECLARE_GETSETOOP(Int, I), |
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1503 DECLARE_GETSETOOP(Long, J), |
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1504 DECLARE_GETSETOOP(Float, F), |
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1505 DECLARE_GETSETOOP(Double, D), |
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1506 |
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1507 DECLARE_GETSETNATIVE(Byte, B), |
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1508 DECLARE_GETSETNATIVE(Short, S), |
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1509 DECLARE_GETSETNATIVE(Char, C), |
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1510 DECLARE_GETSETNATIVE(Int, I), |
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1511 DECLARE_GETSETNATIVE(Long, J), |
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1512 DECLARE_GETSETNATIVE(Float, F), |
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1513 DECLARE_GETSETNATIVE(Double, D), |
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1514 |
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1515 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, |
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1516 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, |
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1517 |
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1518 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, |
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1519 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, |
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1520 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, |
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1521 |
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1522 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, |
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1523 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, |
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1524 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, |
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1525 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
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1526 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, |
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1527 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, |
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1528 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, |
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1529 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, |
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1530 |
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1531 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, |
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1532 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
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1533 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
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1534 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, |
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1535 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, |
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1536 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, |
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1537 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, |
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1538 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, |
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1539 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, |
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1540 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, |
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1541 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, |
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1542 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, |
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1543 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, |
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1544 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, |
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1545 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} |
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1546 }; |
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1547 |
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1548 // These are the methods for 1.8.0 |
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1549 static JNINativeMethod methods_18[] = { |
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1550 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
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1551 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, |
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1552 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, |
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1553 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, |
0 | 1554 |
1555 DECLARE_GETSETOOP(Boolean, Z), | |
1556 DECLARE_GETSETOOP(Byte, B), | |
1557 DECLARE_GETSETOOP(Short, S), | |
1558 DECLARE_GETSETOOP(Char, C), | |
1559 DECLARE_GETSETOOP(Int, I), | |
1560 DECLARE_GETSETOOP(Long, J), | |
1561 DECLARE_GETSETOOP(Float, F), | |
1562 DECLARE_GETSETOOP(Double, D), | |
1563 | |
1564 DECLARE_GETSETNATIVE(Byte, B), | |
1565 DECLARE_GETSETNATIVE(Short, S), | |
1566 DECLARE_GETSETNATIVE(Char, C), | |
1567 DECLARE_GETSETNATIVE(Int, I), | |
1568 DECLARE_GETSETNATIVE(Long, J), | |
1569 DECLARE_GETSETNATIVE(Float, F), | |
1570 DECLARE_GETSETNATIVE(Double, D), | |
1571 | |
1572 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1573 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1574 | |
1575 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1576 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1577 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1578 | |
1579 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1580 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1581 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1582 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1583 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1584 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1585 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1586 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1587 | |
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1588 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1589 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1590 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1591 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1592 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
1593 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1594 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1595 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1596 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1597 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
1598 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
1599 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
1600 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1601 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1602 }; | |
1603 | |
1604 JNINativeMethod loadavg_method[] = { | |
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1605 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} |
0 | 1606 }; |
1607 | |
1608 JNINativeMethod prefetch_methods[] = { | |
1609 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1610 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
1611 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1612 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1613 }; | |
1614 | |
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1615 JNINativeMethod memcopy_methods_17[] = { |
0 | 1616 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, |
1617 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
1618 }; | |
1619 | |
1620 JNINativeMethod memcopy_methods_15[] = { | |
1621 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1622 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
1623 }; | |
1624 | |
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1625 JNINativeMethod anonk_methods[] = { |
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1626 {CC"defineAnonymousClass", CC"("DAC_Args")"CLS, FN_PTR(Unsafe_DefineAnonymousClass)}, |
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1627 }; |
0 | 1628 |
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1629 JNINativeMethod lform_methods[] = { |
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1630 {CC"shouldBeInitialized",CC"("CLS")Z", FN_PTR(Unsafe_ShouldBeInitialized)}, |
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1631 }; |
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1632 |
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1633 JNINativeMethod fence_methods[] = { |
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1634 {CC"loadFence", CC"()V", FN_PTR(Unsafe_LoadFence)}, |
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1635 {CC"storeFence", CC"()V", FN_PTR(Unsafe_StoreFence)}, |
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1636 {CC"fullFence", CC"()V", FN_PTR(Unsafe_FullFence)}, |
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1637 }; |
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1638 |
0 | 1639 #undef CC |
1640 #undef FN_PTR | |
1641 | |
1642 #undef ADR | |
1643 #undef LANG | |
1644 #undef OBJ | |
1645 #undef CLS | |
1646 #undef CTR | |
1647 #undef FLD | |
1648 #undef MTH | |
1649 #undef THR | |
1650 #undef DC0_Args | |
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1651 #undef DC_Args |
0 | 1652 |
1653 #undef DECLARE_GETSETOOP | |
1654 #undef DECLARE_GETSETNATIVE | |
1655 | |
1656 | |
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1657 /** |
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1658 * Helper method to register native methods. |
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1659 */ |
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1660 static bool register_natives(const char* message, JNIEnv* env, jclass clazz, const JNINativeMethod* methods, jint nMethods) { |
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1661 int status = env->RegisterNatives(clazz, methods, nMethods); |
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1662 if (status < 0 || env->ExceptionOccurred()) { |
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1663 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1664 tty->print_cr("Unsafe: failed registering %s", message); |
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1665 } |
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1666 env->ExceptionClear(); |
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1667 return false; |
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1668 } else { |
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1669 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1670 tty->print_cr("Unsafe: successfully registered %s", message); |
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1671 } |
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1672 return true; |
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1673 } |
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1674 } |
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1675 |
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1676 |
0 | 1677 // This one function is exported, used by NativeLookup. |
1678 // The Unsafe_xxx functions above are called only from the interpreter. | |
1679 // The optimizer looks at names and signatures to recognize | |
1680 // individual functions. | |
1681 | |
1682 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
1683 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
1684 { | |
1685 ThreadToNativeFromVM ttnfv(thread); | |
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1686 |
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1687 // Unsafe methods |
0 | 1688 { |
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1689 bool success = false; |
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1690 // 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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1691 if (!success) { |
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1692 success = register_natives("1.6 methods", env, unsafecls, methods_16, sizeof(methods_16)/sizeof(JNINativeMethod)); |
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1693 } |
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1694 if (!success) { |
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1695 success = register_natives("1.8 methods", env, unsafecls, methods_18, sizeof(methods_18)/sizeof(JNINativeMethod)); |
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1696 } |
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1697 if (!success) { |
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1698 success = register_natives("1.5 methods", env, unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); |
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1699 } |
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1700 if (!success) { |
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1701 success = register_natives("1.4.1 methods", env, unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); |
0 | 1702 } |
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1703 if (!success) { |
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1704 success = register_natives("1.4.0 methods", env, unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); |
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1705 } |
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1706 guarantee(success, "register unsafe natives"); |
0 | 1707 } |
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1708 |
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1709 // Unsafe.getLoadAverage |
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1710 register_natives("1.6 loadavg method", env, unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); |
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1711 |
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1712 // Prefetch methods |
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1713 register_natives("1.6 prefetch methods", env, unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); |
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1714 |
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1715 // Memory copy methods |
0 | 1716 { |
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1717 bool success = false; |
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1718 if (!success) { |
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1719 success = register_natives("1.7 memory copy methods", env, unsafecls, memcopy_methods_17, sizeof(memcopy_methods_17)/sizeof(JNINativeMethod)); |
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1720 } |
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1721 if (!success) { |
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1722 success = register_natives("1.5 memory copy methods", env, unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); |
0 | 1723 } |
1724 } | |
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1725 |
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1726 // Unsafe.defineAnonymousClass |
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1727 if (EnableInvokeDynamic) { |
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1728 register_natives("1.7 define anonymous class method", env, unsafecls, anonk_methods, sizeof(anonk_methods)/sizeof(JNINativeMethod)); |
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1729 } |
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1730 |
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1731 // Unsafe.shouldBeInitialized |
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1732 if (EnableInvokeDynamic) { |
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1733 register_natives("1.7 LambdaForm support", env, unsafecls, lform_methods, sizeof(lform_methods)/sizeof(JNINativeMethod)); |
0 | 1734 } |
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1735 |
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1736 // Fence methods |
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1737 register_natives("1.8 fence methods", env, unsafecls, fence_methods, sizeof(fence_methods)/sizeof(JNINativeMethod)); |
0 | 1738 } |
1739 JVM_END |