Mercurial > hg > graal-jvmci-8
annotate src/share/vm/prims/unsafe.cpp @ 23660:b5f3a471e646
Merge.
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 01 Jun 2016 00:11:44 +0200 |
parents | dd9cc155639c 32b682649973 |
children | f13e777eb255 |
rev | line source |
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0 | 1 /* |
23614 | 2 * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/vmSymbols.hpp" | |
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27 #include "utilities/macros.hpp" |
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28 #if INCLUDE_ALL_GCS |
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29 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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30 #endif // INCLUDE_ALL_GCS |
1972 | 31 #include "memory/allocation.inline.hpp" |
32 #include "prims/jni.h" | |
33 #include "prims/jvm.h" | |
34 #include "runtime/globals.hpp" | |
35 #include "runtime/interfaceSupport.hpp" | |
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36 #include "runtime/prefetch.inline.hpp" |
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37 #include "runtime/orderAccess.inline.hpp" |
1972 | 38 #include "runtime/reflection.hpp" |
39 #include "runtime/synchronizer.hpp" | |
40 #include "services/threadService.hpp" | |
10405 | 41 #include "trace/tracing.hpp" |
1972 | 42 #include "utilities/copy.hpp" |
43 #include "utilities/dtrace.hpp" | |
44 | |
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45 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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46 |
0 | 47 /* |
48 * Implementation of class sun.misc.Unsafe | |
49 */ | |
50 | |
4006 | 51 #ifndef USDT2 |
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52 HS_DTRACE_PROBE_DECL3(hotspot, thread__park__begin, uintptr_t, int, long long); |
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53 HS_DTRACE_PROBE_DECL1(hotspot, thread__park__end, uintptr_t); |
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54 HS_DTRACE_PROBE_DECL1(hotspot, thread__unpark, uintptr_t); |
4006 | 55 #endif /* !USDT2 */ |
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56 |
0 | 57 #define MAX_OBJECT_SIZE \ |
58 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ | |
59 + ((julong)max_jint * sizeof(double)) ) | |
60 | |
61 | |
62 #define UNSAFE_ENTRY(result_type, header) \ | |
63 JVM_ENTRY(result_type, header) | |
64 | |
65 // Can't use UNSAFE_LEAF because it has the signature of a straight | |
66 // call into the runtime (just like JVM_LEAF, funny that) but it's | |
67 // called like a Java Native and thus the wrapper built for it passes | |
68 // arguments like a JNI call. It expects those arguments to be popped | |
69 // from the stack on Intel like all good JNI args are, and adjusts the | |
70 // stack according. Since the JVM_LEAF call expects no extra | |
71 // arguments the stack isn't popped in the C code, is pushed by the | |
72 // wrapper and we get sick. | |
73 //#define UNSAFE_LEAF(result_type, header) \ | |
74 // JVM_LEAF(result_type, header) | |
75 | |
76 #define UNSAFE_END JVM_END | |
77 | |
78 #define UnsafeWrapper(arg) /*nothing, for the present*/ | |
79 | |
80 | |
81 inline void* addr_from_java(jlong addr) { | |
82 // This assert fails in a variety of ways on 32-bit systems. | |
83 // It is impossible to predict whether native code that converts | |
84 // pointers to longs will sign-extend or zero-extend the addresses. | |
85 //assert(addr == (uintptr_t)addr, "must not be odd high bits"); | |
86 return (void*)(uintptr_t)addr; | |
87 } | |
88 | |
89 inline jlong addr_to_java(void* p) { | |
90 assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); | |
91 return (uintptr_t)p; | |
92 } | |
93 | |
94 | |
95 // Note: The VM's obj_field and related accessors use byte-scaled | |
96 // ("unscaled") offsets, just as the unsafe methods do. | |
97 | |
98 // However, the method Unsafe.fieldOffset explicitly declines to | |
99 // guarantee this. The field offset values manipulated by the Java user | |
100 // through the Unsafe API are opaque cookies that just happen to be byte | |
101 // offsets. We represent this state of affairs by passing the cookies | |
102 // through conversion functions when going between the VM and the Unsafe API. | |
103 // The conversion functions just happen to be no-ops at present. | |
104 | |
105 inline jlong field_offset_to_byte_offset(jlong field_offset) { | |
106 return field_offset; | |
107 } | |
108 | |
109 inline jlong field_offset_from_byte_offset(jlong byte_offset) { | |
110 return byte_offset; | |
111 } | |
112 | |
113 inline jint invocation_key_from_method_slot(jint slot) { | |
114 return slot; | |
115 } | |
116 | |
117 inline jint invocation_key_to_method_slot(jint key) { | |
118 return key; | |
119 } | |
120 | |
121 inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { | |
122 jlong byte_offset = field_offset_to_byte_offset(field_offset); | |
123 #ifdef ASSERT | |
124 if (p != NULL) { | |
125 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
126 if (byte_offset == (jint)byte_offset) { | |
127 void* ptr_plus_disp = (address)p + byte_offset; | |
113
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128 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
0 | 129 "raw [ptr+disp] must be consistent with oop::field_base"); |
130 } | |
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131 jlong p_size = HeapWordSize * (jlong)(p->size()); |
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132 assert(byte_offset < p_size, err_msg("Unsafe access: offset " INT64_FORMAT " > object's size " INT64_FORMAT, byte_offset, p_size)); |
0 | 133 } |
134 #endif | |
135 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
136 return (address)p + (jint) byte_offset; | |
137 else | |
138 return (address)p + byte_offset; | |
139 } | |
140 | |
141 // Externally callable versions: | |
142 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
143 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
144 return field_offset; | |
145 } | |
146 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
147 return byte_offset; | |
148 } | |
149 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
150 return invocation_key_from_method_slot(slot); | |
151 } | |
152 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
153 return invocation_key_to_method_slot(key); | |
154 } | |
155 | |
156 | |
157 ///// Data in the Java heap. | |
158 | |
23614 | 159 #define truncate_jboolean(x) ((x) & 1) |
160 #define truncate_jbyte(x) (x) | |
161 #define truncate_jshort(x) (x) | |
162 #define truncate_jchar(x) (x) | |
163 #define truncate_jint(x) (x) | |
164 #define truncate_jlong(x) (x) | |
165 #define truncate_jfloat(x) (x) | |
166 #define truncate_jdouble(x) (x) | |
167 | |
0 | 168 #define GET_FIELD(obj, offset, type_name, v) \ |
169 oop p = JNIHandles::resolve(obj); \ | |
170 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
171 | |
172 #define SET_FIELD(obj, offset, type_name, x) \ | |
173 oop p = JNIHandles::resolve(obj); \ | |
23614 | 174 *(type_name*)index_oop_from_field_offset_long(p, offset) = truncate_##type_name(x) |
0 | 175 |
176 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
177 oop p = JNIHandles::resolve(obj); \ | |
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178 if (support_IRIW_for_not_multiple_copy_atomic_cpu) { \ |
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179 OrderAccess::fence(); \ |
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180 } \ |
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181 volatile type_name v = OrderAccess::load_acquire((volatile type_name*)index_oop_from_field_offset_long(p, offset)); |
0 | 182 |
183 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
184 oop p = JNIHandles::resolve(obj); \ | |
23614 | 185 OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), truncate_##type_name(x)); |
0 | 186 |
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187 // Macros for oops that check UseCompressedOops |
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188 |
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189 #define GET_OOP_FIELD(obj, offset, v) \ |
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190 oop p = JNIHandles::resolve(obj); \ |
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191 oop v; \ |
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192 if (UseCompressedOops) { \ |
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193 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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194 v = oopDesc::decode_heap_oop(n); \ |
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195 } else { \ |
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196 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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197 } |
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198 |
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199 |
0 | 200 // Get/SetObject must be special-cased, since it works with handles. |
201 | |
202 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
203 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
204 UnsafeWrapper("Unsafe_GetObject"); | |
205 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
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206 GET_OOP_FIELD(obj, offset, v) |
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207 jobject ret = JNIHandles::make_local(env, v); |
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208 #if INCLUDE_ALL_GCS |
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209 // We could be accessing the referent field in a reference |
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210 // object. If G1 is enabled then we need to register a non-null |
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211 // referent with the SATB barrier. |
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212 if (UseG1GC) { |
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213 bool needs_barrier = false; |
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214 |
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215 if (ret != NULL) { |
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216 if (offset == java_lang_ref_Reference::referent_offset) { |
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217 oop o = JNIHandles::resolve_non_null(obj); |
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218 Klass* k = o->klass(); |
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219 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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220 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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221 needs_barrier = true; |
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222 } |
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223 } |
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224 } |
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225 |
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226 if (needs_barrier) { |
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227 oop referent = JNIHandles::resolve(ret); |
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228 G1SATBCardTableModRefBS::enqueue(referent); |
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229 } |
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230 } |
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231 #endif // INCLUDE_ALL_GCS |
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232 return ret; |
0 | 233 UNSAFE_END |
234 | |
235 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
236 UnsafeWrapper("Unsafe_SetObject"); | |
237 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
238 oop x = JNIHandles::resolve(x_h); | |
239 //SET_FIELD(obj, offset, oop, x); | |
240 oop p = JNIHandles::resolve(obj); | |
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241 if (UseCompressedOops) { |
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242 if (x != NULL) { |
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243 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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244 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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245 } else { |
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246 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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247 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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248 } |
0 | 249 } else { |
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250 if (x != NULL) { |
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251 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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252 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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253 } else { |
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254 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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255 } |
0 | 256 } |
257 UNSAFE_END | |
258 | |
259 // The normal variants allow a null base pointer with an arbitrary address. | |
260 // But if the base pointer is non-null, the offset should make some sense. | |
261 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
262 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
263 UnsafeWrapper("Unsafe_GetObject"); | |
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264 GET_OOP_FIELD(obj, offset, v) |
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265 jobject ret = JNIHandles::make_local(env, v); |
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266 #if INCLUDE_ALL_GCS |
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267 // We could be accessing the referent field in a reference |
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268 // object. If G1 is enabled then we need to register non-null |
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269 // referent with the SATB barrier. |
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270 if (UseG1GC) { |
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271 bool needs_barrier = false; |
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272 |
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273 if (ret != NULL) { |
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274 if (offset == java_lang_ref_Reference::referent_offset && obj != NULL) { |
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275 oop o = JNIHandles::resolve(obj); |
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276 Klass* k = o->klass(); |
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277 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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278 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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279 needs_barrier = true; |
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280 } |
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281 } |
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282 } |
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283 |
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284 if (needs_barrier) { |
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285 oop referent = JNIHandles::resolve(ret); |
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286 G1SATBCardTableModRefBS::enqueue(referent); |
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287 } |
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288 } |
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289 #endif // INCLUDE_ALL_GCS |
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290 return ret; |
0 | 291 UNSAFE_END |
292 | |
293 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
294 UnsafeWrapper("Unsafe_SetObject"); | |
295 oop x = JNIHandles::resolve(x_h); | |
296 oop p = JNIHandles::resolve(obj); | |
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297 if (UseCompressedOops) { |
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298 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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299 } else { |
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300 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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301 } |
0 | 302 UNSAFE_END |
303 | |
304 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
305 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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306 oop p = JNIHandles::resolve(obj); |
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307 void* addr = index_oop_from_field_offset_long(p, offset); |
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308 volatile oop v; |
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309 if (UseCompressedOops) { |
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310 volatile narrowOop n = *(volatile narrowOop*) addr; |
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311 (void)const_cast<oop&>(v = oopDesc::decode_heap_oop(n)); |
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312 } else { |
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313 (void)const_cast<oop&>(v = *(volatile oop*) addr); |
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314 } |
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315 OrderAccess::acquire(); |
0 | 316 return JNIHandles::make_local(env, v); |
317 UNSAFE_END | |
318 | |
319 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
320 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
321 oop x = JNIHandles::resolve(x_h); | |
322 oop p = JNIHandles::resolve(obj); | |
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323 void* addr = index_oop_from_field_offset_long(p, offset); |
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324 OrderAccess::release(); |
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325 if (UseCompressedOops) { |
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326 oop_store((narrowOop*)addr, x); |
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327 } else { |
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328 oop_store((oop*)addr, x); |
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329 } |
0 | 330 OrderAccess::fence(); |
331 UNSAFE_END | |
332 | |
10235 | 333 #ifndef SUPPORTS_NATIVE_CX8 |
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334 |
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335 // VM_Version::supports_cx8() is a surrogate for 'supports atomic long memory ops'. |
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336 // |
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337 // On platforms which do not support atomic compare-and-swap of jlong (8 byte) |
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338 // values we have to use a lock-based scheme to enforce atomicity. This has to be |
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339 // applied to all Unsafe operations that set the value of a jlong field. Even so |
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340 // the compareAndSwapLong operation will not be atomic with respect to direct stores |
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341 // to the field from Java code. It is important therefore that any Java code that |
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342 // utilizes these Unsafe jlong operations does not perform direct stores. To permit |
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343 // direct loads of the field from Java code we must also use Atomic::store within the |
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344 // locked regions. And for good measure, in case there are direct stores, we also |
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345 // employ Atomic::load within those regions. Note that the field in question must be |
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346 // volatile and so must have atomic load/store accesses applied at the Java level. |
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347 // |
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348 // The locking scheme could utilize a range of strategies for controlling the locking |
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349 // granularity: from a lock per-field through to a single global lock. The latter is |
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350 // the simplest and is used for the current implementation. Note that the Java object |
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351 // that contains the field, can not, in general, be used for locking. To do so can lead |
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352 // to deadlocks as we may introduce locking into what appears to the Java code to be a |
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353 // lock-free path. |
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354 // |
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355 // As all the locked-regions are very short and themselves non-blocking we can treat |
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356 // them as leaf routines and elide safepoint checks (ie we don't perform any thread |
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357 // state transitions even when blocking for the lock). Note that if we do choose to |
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358 // add safepoint checks and thread state transitions, we must ensure that we calculate |
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359 // the address of the field _after_ we have acquired the lock, else the object may have |
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360 // been moved by the GC |
0 | 361 |
362 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
363 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
364 { | |
365 if (VM_Version::supports_cx8()) { | |
366 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
367 return v; | |
368 } | |
369 else { | |
370 Handle p (THREAD, JNIHandles::resolve(obj)); | |
371 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
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372 MutexLockerEx mu(UnsafeJlong_lock, Mutex::_no_safepoint_check_flag); |
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373 jlong value = Atomic::load(addr); |
0 | 374 return value; |
375 } | |
376 } | |
377 UNSAFE_END | |
378 | |
379 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
380 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
381 { | |
382 if (VM_Version::supports_cx8()) { | |
383 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
384 } | |
385 else { | |
386 Handle p (THREAD, JNIHandles::resolve(obj)); | |
387 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
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388 MutexLockerEx mu(UnsafeJlong_lock, Mutex::_no_safepoint_check_flag); |
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389 Atomic::store(x, addr); |
0 | 390 } |
391 } | |
392 UNSAFE_END | |
393 | |
10235 | 394 #endif // not SUPPORTS_NATIVE_CX8 |
0 | 395 |
396 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
397 \ | |
398 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
399 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
400 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
401 GET_FIELD(obj, offset, jboolean, v); \ | |
402 return v; \ | |
403 UNSAFE_END \ | |
404 \ | |
405 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
406 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
407 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
408 SET_FIELD(obj, offset, jboolean, x); \ | |
409 UNSAFE_END \ | |
410 \ | |
411 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
412 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
413 GET_FIELD(obj, offset, jboolean, v); \ | |
414 return v; \ | |
415 UNSAFE_END \ | |
416 \ | |
417 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
418 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
419 SET_FIELD(obj, offset, jboolean, x); \ | |
420 UNSAFE_END \ | |
421 \ | |
422 // END DEFINE_GETSETOOP. | |
423 | |
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424 DEFINE_GETSETOOP(jboolean, Boolean) |
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425 DEFINE_GETSETOOP(jbyte, Byte) |
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426 DEFINE_GETSETOOP(jshort, Short); |
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427 DEFINE_GETSETOOP(jchar, Char); |
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428 DEFINE_GETSETOOP(jint, Int); |
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429 DEFINE_GETSETOOP(jlong, Long); |
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430 DEFINE_GETSETOOP(jfloat, Float); |
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431 DEFINE_GETSETOOP(jdouble, Double); |
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432 |
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433 #undef DEFINE_GETSETOOP |
0 | 434 |
435 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
436 \ | |
437 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
438 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
439 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
440 return v; \ | |
441 UNSAFE_END \ | |
442 \ | |
443 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
444 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
445 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
446 UNSAFE_END \ | |
447 \ | |
448 // END DEFINE_GETSETOOP_VOLATILE. | |
449 | |
450 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
451 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
452 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
453 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
454 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
455 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
456 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
457 | |
10235 | 458 #ifdef SUPPORTS_NATIVE_CX8 |
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459 DEFINE_GETSETOOP_VOLATILE(jlong, Long); |
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460 #endif |
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461 |
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462 #undef DEFINE_GETSETOOP_VOLATILE |
0 | 463 |
464 // The non-intrinsified versions of setOrdered just use setVolatile | |
465 | |
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466 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) |
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467 UnsafeWrapper("Unsafe_SetOrderedInt"); |
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468 SET_FIELD_VOLATILE(obj, offset, jint, x); |
0 | 469 UNSAFE_END |
470 | |
471 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
472 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
473 oop x = JNIHandles::resolve(x_h); | |
474 oop p = JNIHandles::resolve(obj); | |
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475 void* addr = index_oop_from_field_offset_long(p, offset); |
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476 OrderAccess::release(); |
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477 if (UseCompressedOops) { |
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478 oop_store((narrowOop*)addr, x); |
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479 } else { |
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480 oop_store((oop*)addr, x); |
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481 } |
0 | 482 OrderAccess::fence(); |
483 UNSAFE_END | |
484 | |
485 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
486 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
10235 | 487 #ifdef SUPPORTS_NATIVE_CX8 |
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488 SET_FIELD_VOLATILE(obj, offset, jlong, x); |
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489 #else |
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490 // Keep old code for platforms which may not have atomic long (8 bytes) instructions |
0 | 491 { |
492 if (VM_Version::supports_cx8()) { | |
493 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
494 } | |
495 else { | |
496 Handle p (THREAD, JNIHandles::resolve(obj)); | |
497 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
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498 MutexLockerEx mu(UnsafeJlong_lock, Mutex::_no_safepoint_check_flag); |
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499 Atomic::store(x, addr); |
0 | 500 } |
501 } | |
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502 #endif |
0 | 503 UNSAFE_END |
504 | |
7425 | 505 UNSAFE_ENTRY(void, Unsafe_LoadFence(JNIEnv *env, jobject unsafe)) |
506 UnsafeWrapper("Unsafe_LoadFence"); | |
507 OrderAccess::acquire(); | |
508 UNSAFE_END | |
509 | |
510 UNSAFE_ENTRY(void, Unsafe_StoreFence(JNIEnv *env, jobject unsafe)) | |
511 UnsafeWrapper("Unsafe_StoreFence"); | |
512 OrderAccess::release(); | |
513 UNSAFE_END | |
514 | |
515 UNSAFE_ENTRY(void, Unsafe_FullFence(JNIEnv *env, jobject unsafe)) | |
516 UnsafeWrapper("Unsafe_FullFence"); | |
517 OrderAccess::fence(); | |
518 UNSAFE_END | |
519 | |
0 | 520 ////// Data in the C heap. |
521 | |
522 // Note: These do not throw NullPointerException for bad pointers. | |
523 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
524 // | |
525 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
526 \ | |
527 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
528 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
529 void* p = addr_from_java(addr); \ | |
530 JavaThread* t = JavaThread::current(); \ | |
531 t->set_doing_unsafe_access(true); \ | |
532 java_type x = *(volatile native_type*)p; \ | |
533 t->set_doing_unsafe_access(false); \ | |
534 return x; \ | |
535 UNSAFE_END \ | |
536 \ | |
537 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
538 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
539 JavaThread* t = JavaThread::current(); \ | |
540 t->set_doing_unsafe_access(true); \ | |
541 void* p = addr_from_java(addr); \ | |
542 *(volatile native_type*)p = x; \ | |
543 t->set_doing_unsafe_access(false); \ | |
544 UNSAFE_END \ | |
545 \ | |
546 // END DEFINE_GETSETNATIVE. | |
547 | |
548 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
549 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
550 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
551 DEFINE_GETSETNATIVE(jint, Int, jint); | |
552 // no long -- handled specially | |
553 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
554 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
555 | |
556 #undef DEFINE_GETSETNATIVE | |
557 | |
558 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
559 UnsafeWrapper("Unsafe_GetNativeLong"); | |
560 JavaThread* t = JavaThread::current(); | |
561 // We do it this way to avoid problems with access to heap using 64 | |
562 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
563 // some CPUs (SPARC) it leads to SIGBUS. | |
564 t->set_doing_unsafe_access(true); | |
565 void* p = addr_from_java(addr); | |
566 jlong x; | |
567 if (((intptr_t)p & 7) == 0) { | |
568 // jlong is aligned, do a volatile access | |
569 x = *(volatile jlong*)p; | |
570 } else { | |
571 jlong_accessor acc; | |
572 acc.words[0] = ((volatile jint*)p)[0]; | |
573 acc.words[1] = ((volatile jint*)p)[1]; | |
574 x = acc.long_value; | |
575 } | |
576 t->set_doing_unsafe_access(false); | |
577 return x; | |
578 UNSAFE_END | |
579 | |
580 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
581 UnsafeWrapper("Unsafe_SetNativeLong"); | |
582 JavaThread* t = JavaThread::current(); | |
583 // see comment for Unsafe_GetNativeLong | |
584 t->set_doing_unsafe_access(true); | |
585 void* p = addr_from_java(addr); | |
586 if (((intptr_t)p & 7) == 0) { | |
587 // jlong is aligned, do a volatile access | |
588 *(volatile jlong*)p = x; | |
589 } else { | |
590 jlong_accessor acc; | |
591 acc.long_value = x; | |
592 ((volatile jint*)p)[0] = acc.words[0]; | |
593 ((volatile jint*)p)[1] = acc.words[1]; | |
594 } | |
595 t->set_doing_unsafe_access(false); | |
596 UNSAFE_END | |
597 | |
598 | |
599 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
600 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
601 void* p = addr_from_java(addr); | |
602 return addr_to_java(*(void**)p); | |
603 UNSAFE_END | |
604 | |
605 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
606 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
607 void* p = addr_from_java(addr); | |
608 *(void**)p = addr_from_java(x); | |
609 UNSAFE_END | |
610 | |
611 | |
612 ////// Allocation requests | |
613 | |
614 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
615 UnsafeWrapper("Unsafe_AllocateInstance"); | |
616 { | |
617 ThreadToNativeFromVM ttnfv(thread); | |
618 return env->AllocObject(cls); | |
619 } | |
620 UNSAFE_END | |
621 | |
622 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
623 UnsafeWrapper("Unsafe_AllocateMemory"); | |
624 size_t sz = (size_t)size; | |
625 if (sz != (julong)size || size < 0) { | |
626 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
627 } | |
628 if (sz == 0) { | |
629 return 0; | |
630 } | |
631 sz = round_to(sz, HeapWordSize); | |
6197 | 632 void* x = os::malloc(sz, mtInternal); |
0 | 633 if (x == NULL) { |
634 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
635 } | |
636 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
637 return addr_to_java(x); | |
638 UNSAFE_END | |
639 | |
640 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
641 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
642 void* p = addr_from_java(addr); | |
643 size_t sz = (size_t)size; | |
644 if (sz != (julong)size || size < 0) { | |
645 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
646 } | |
647 if (sz == 0) { | |
648 os::free(p); | |
649 return 0; | |
650 } | |
651 sz = round_to(sz, HeapWordSize); | |
6197 | 652 void* x = (p == NULL) ? os::malloc(sz, mtInternal) : os::realloc(p, sz, mtInternal); |
0 | 653 if (x == NULL) { |
654 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
655 } | |
656 return addr_to_java(x); | |
657 UNSAFE_END | |
658 | |
659 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
660 UnsafeWrapper("Unsafe_FreeMemory"); | |
661 void* p = addr_from_java(addr); | |
662 if (p == NULL) { | |
663 return; | |
664 } | |
665 os::free(p); | |
666 UNSAFE_END | |
667 | |
668 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
669 UnsafeWrapper("Unsafe_SetMemory"); | |
670 size_t sz = (size_t)size; | |
671 if (sz != (julong)size || size < 0) { | |
672 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
673 } | |
674 char* p = (char*) addr_from_java(addr); | |
675 Copy::fill_to_memory_atomic(p, sz, value); | |
676 UNSAFE_END | |
677 | |
678 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
679 UnsafeWrapper("Unsafe_SetMemory"); | |
680 size_t sz = (size_t)size; | |
681 if (sz != (julong)size || size < 0) { | |
682 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
683 } | |
684 oop base = JNIHandles::resolve(obj); | |
685 void* p = index_oop_from_field_offset_long(base, offset); | |
686 Copy::fill_to_memory_atomic(p, sz, value); | |
687 UNSAFE_END | |
688 | |
689 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
690 UnsafeWrapper("Unsafe_CopyMemory"); | |
691 if (size == 0) { | |
692 return; | |
693 } | |
694 size_t sz = (size_t)size; | |
695 if (sz != (julong)size || size < 0) { | |
696 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
697 } | |
698 void* src = addr_from_java(srcAddr); | |
699 void* dst = addr_from_java(dstAddr); | |
700 Copy::conjoint_memory_atomic(src, dst, sz); | |
701 UNSAFE_END | |
702 | |
703 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
704 UnsafeWrapper("Unsafe_CopyMemory"); | |
705 if (size == 0) { | |
706 return; | |
707 } | |
708 size_t sz = (size_t)size; | |
709 if (sz != (julong)size || size < 0) { | |
710 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
711 } | |
712 oop srcp = JNIHandles::resolve(srcObj); | |
713 oop dstp = JNIHandles::resolve(dstObj); | |
714 if (dstp != NULL && !dstp->is_typeArray()) { | |
715 // NYI: This works only for non-oop arrays at present. | |
716 // Generalizing it would be reasonable, but requires card marking. | |
717 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
718 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
719 } | |
720 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
721 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
722 Copy::conjoint_memory_atomic(src, dst, sz); | |
723 UNSAFE_END | |
724 | |
725 | |
726 ////// Random queries | |
727 | |
728 // See comment at file start about UNSAFE_LEAF | |
729 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
730 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
731 UnsafeWrapper("Unsafe_AddressSize"); | |
732 return sizeof(void*); | |
733 UNSAFE_END | |
734 | |
735 // See comment at file start about UNSAFE_LEAF | |
736 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
737 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
738 UnsafeWrapper("Unsafe_PageSize"); | |
739 return os::vm_page_size(); | |
740 UNSAFE_END | |
741 | |
742 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
743 if (field == NULL) { | |
744 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
745 } | |
746 | |
747 oop reflected = JNIHandles::resolve_non_null(field); | |
748 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
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749 Klass* k = java_lang_Class::as_Klass(mirror); |
0 | 750 int slot = java_lang_reflect_Field::slot(reflected); |
751 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
752 | |
753 if (must_be_static >= 0) { | |
754 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
755 if (must_be_static != really_is_static) { | |
756 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
757 } | |
758 } | |
759 | |
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760 int offset = InstanceKlass::cast(k)->field_offset(slot); |
0 | 761 return field_offset_from_byte_offset(offset); |
762 } | |
763 | |
764 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
765 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
766 return find_field_offset(field, 0, THREAD); | |
767 UNSAFE_END | |
768 | |
769 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
770 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
771 return find_field_offset(field, 1, THREAD); | |
772 UNSAFE_END | |
773 | |
774 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
775 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
776 // Note: In this VM implementation, a field address is always a short | |
777 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
778 // range of the return type is never used. However, some implementations | |
779 // might put the static field inside an array shared by many classes, | |
780 // or even at a fixed address, in which case the address could be quite | |
781 // large. In that last case, this function would return NULL, since | |
782 // the address would operate alone, without any base pointer. | |
783 | |
784 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
785 | |
786 oop reflected = JNIHandles::resolve_non_null(field); | |
787 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
788 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
789 | |
790 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
791 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
792 } | |
793 | |
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794 return JNIHandles::make_local(env, mirror); |
0 | 795 UNSAFE_END |
796 | |
797 //@deprecated | |
798 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
799 UnsafeWrapper("Unsafe_FieldOffset"); | |
800 // tries (but fails) to be polymorphic between static and non-static: | |
801 jlong offset = find_field_offset(field, -1, THREAD); | |
802 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
803 return (jint)offset; | |
804 UNSAFE_END | |
805 | |
806 //@deprecated | |
807 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
808 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
809 if (clazz == NULL) { | |
810 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
811 } | |
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812 return JNIHandles::make_local(env, JNIHandles::resolve_non_null(clazz)); |
0 | 813 UNSAFE_END |
814 | |
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815 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
0 | 816 UnsafeWrapper("Unsafe_EnsureClassInitialized"); |
817 if (clazz == NULL) { | |
818 THROW(vmSymbols::java_lang_NullPointerException()); | |
819 } | |
820 oop mirror = JNIHandles::resolve_non_null(clazz); | |
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821 |
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822 Klass* klass = java_lang_Class::as_Klass(mirror); |
6983 | 823 if (klass != NULL && klass->should_be_initialized()) { |
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824 InstanceKlass* k = InstanceKlass::cast(klass); |
0 | 825 k->initialize(CHECK); |
826 } | |
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827 } |
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828 UNSAFE_END |
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829 |
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830 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
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831 UnsafeWrapper("Unsafe_ShouldBeInitialized"); |
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832 if (clazz == NULL) { |
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833 THROW_(vmSymbols::java_lang_NullPointerException(), false); |
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834 } |
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835 oop mirror = JNIHandles::resolve_non_null(clazz); |
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836 Klass* klass = java_lang_Class::as_Klass(mirror); |
6983 | 837 if (klass != NULL && klass->should_be_initialized()) { |
6266
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838 return true; |
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839 } |
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840 return false; |
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841 } |
0 | 842 UNSAFE_END |
843 | |
844 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
845 if (acls == NULL) { | |
846 THROW(vmSymbols::java_lang_NullPointerException()); | |
847 } | |
848 oop mirror = JNIHandles::resolve_non_null(acls); | |
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849 Klass* k = java_lang_Class::as_Klass(mirror); |
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850 if (k == NULL || !k->oop_is_array()) { |
0 | 851 THROW(vmSymbols::java_lang_InvalidClassException()); |
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852 } else if (k->oop_is_objArray()) { |
0 | 853 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); |
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854 scale = heapOopSize; |
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855 } else if (k->oop_is_typeArray()) { |
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856 TypeArrayKlass* tak = TypeArrayKlass::cast(k); |
0 | 857 base = tak->array_header_in_bytes(); |
858 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
859 scale = (1 << tak->log2_element_size()); | |
860 } else { | |
861 ShouldNotReachHere(); | |
862 } | |
863 } | |
864 | |
865 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
866 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
867 int base, scale; | |
868 getBaseAndScale(base, scale, acls, CHECK_0); | |
869 return field_offset_from_byte_offset(base); | |
870 UNSAFE_END | |
871 | |
872 | |
873 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
874 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
875 int base, scale; | |
876 getBaseAndScale(base, scale, acls, CHECK_0); | |
877 // This VM packs both fields and array elements down to the byte. | |
878 // But watch out: If this changes, so that array references for | |
879 // a given primitive type (say, T_BOOLEAN) use different memory units | |
880 // than fields, this method MUST return zero for such arrays. | |
881 // For example, the VM used to store sub-word sized fields in full | |
882 // words in the object layout, so that accessors like getByte(Object,int) | |
883 // did not really do what one might expect for arrays. Therefore, | |
884 // this function used to report a zero scale factor, so that the user | |
885 // would know not to attempt to access sub-word array elements. | |
886 // // Code for unpacked fields: | |
887 // if (scale < wordSize) return 0; | |
888 | |
889 // The following allows for a pretty general fieldOffset cookie scheme, | |
890 // but requires it to be linear in byte offset. | |
891 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
892 UNSAFE_END | |
893 | |
894 | |
895 static inline void throw_new(JNIEnv *env, const char *ename) { | |
896 char buf[100]; | |
897 strcpy(buf, "java/lang/"); | |
898 strcat(buf, ename); | |
899 jclass cls = env->FindClass(buf); | |
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900 if (env->ExceptionCheck()) { |
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901 env->ExceptionClear(); |
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902 tty->print_cr("Unsafe: cannot throw %s because FindClass has failed", buf); |
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903 return; |
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904 } |
0 | 905 char* msg = NULL; |
906 env->ThrowNew(cls, msg); | |
907 } | |
908 | |
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909 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { |
0 | 910 { |
911 // Code lifted from JDK 1.3 ClassLoader.c | |
912 | |
913 jbyte *body; | |
914 char *utfName; | |
915 jclass result = 0; | |
916 char buf[128]; | |
917 | |
918 if (UsePerfData) { | |
919 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
920 } | |
921 | |
922 if (data == NULL) { | |
923 throw_new(env, "NullPointerException"); | |
924 return 0; | |
925 } | |
926 | |
927 /* Work around 4153825. malloc crashes on Solaris when passed a | |
928 * negative size. | |
929 */ | |
930 if (length < 0) { | |
931 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
932 return 0; | |
933 } | |
934 | |
6197 | 935 body = NEW_C_HEAP_ARRAY(jbyte, length, mtInternal); |
0 | 936 |
937 if (body == 0) { | |
938 throw_new(env, "OutOfMemoryError"); | |
939 return 0; | |
940 } | |
941 | |
942 env->GetByteArrayRegion(data, offset, length, body); | |
943 | |
944 if (env->ExceptionOccurred()) | |
945 goto free_body; | |
946 | |
947 if (name != NULL) { | |
948 uint len = env->GetStringUTFLength(name); | |
949 int unicode_len = env->GetStringLength(name); | |
950 if (len >= sizeof(buf)) { | |
6197 | 951 utfName = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); |
0 | 952 if (utfName == NULL) { |
953 throw_new(env, "OutOfMemoryError"); | |
954 goto free_body; | |
955 } | |
956 } else { | |
957 utfName = buf; | |
958 } | |
959 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
960 //VerifyFixClassname(utfName); | |
961 for (uint i = 0; i < len; i++) { | |
962 if (utfName[i] == '.') utfName[i] = '/'; | |
963 } | |
964 } else { | |
965 utfName = NULL; | |
966 } | |
967 | |
968 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
969 | |
970 if (utfName && utfName != buf) | |
6197 | 971 FREE_C_HEAP_ARRAY(char, utfName, mtInternal); |
0 | 972 |
973 free_body: | |
6197 | 974 FREE_C_HEAP_ARRAY(jbyte, body, mtInternal); |
0 | 975 return result; |
976 } | |
977 } | |
978 | |
979 | |
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980 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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981 UnsafeWrapper("Unsafe_DefineClass"); |
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982 { |
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983 ThreadToNativeFromVM ttnfv(thread); |
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984 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
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985 } |
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986 UNSAFE_END |
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987 |
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988 static jobject get_class_loader(JNIEnv* env, jclass cls) { |
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989 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { |
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990 return NULL; |
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991 } |
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992 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
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993 oop loader = k->class_loader(); |
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994 return JNIHandles::make_local(env, loader); |
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995 } |
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996 |
0 | 997 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) |
998 UnsafeWrapper("Unsafe_DefineClass"); | |
999 { | |
1000 ThreadToNativeFromVM ttnfv(thread); | |
1001 | |
1002 int depthFromDefineClass0 = 1; | |
1003 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
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1004 jobject loader = (caller == NULL) ? NULL : get_class_loader(env, caller); |
0 | 1005 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); |
1006 | |
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1007 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
0 | 1008 } |
1009 UNSAFE_END | |
1010 | |
1011 | |
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1012 #define DAC_Args CLS"[B["OBJ |
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1013 // define a class but do not make it known to the class loader or system dictionary |
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1014 // - host_class: supplies context for linkage, access control, protection domain, and class loader |
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1015 // - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
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1016 // - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
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1017 |
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1018 // When you load an anonymous class U, it works as if you changed its name just before loading, |
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1019 // to a name that you will never use again. Since the name is lost, no other class can directly |
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1020 // link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
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1021 // through java.lang.Class methods like Class.newInstance. |
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1022 |
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1023 // Access checks for linkage sites within U continue to follow the same rules as for named classes. |
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1024 // The package of an anonymous class is given by the package qualifier on the name under which it was loaded. |
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1025 // An anonymous class also has special privileges to access any member of its host class. |
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1026 // This is the main reason why this loading operation is unsafe. The purpose of this is to |
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1027 // allow language implementations to simulate "open classes"; a host class in effect gets |
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1028 // new code when an anonymous class is loaded alongside it. A less convenient but more |
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1029 // standard way to do this is with reflection, which can also be set to ignore access |
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1030 // restrictions. |
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1031 |
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1032 // Access into an anonymous class is possible only through reflection. Therefore, there |
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1033 // are no special access rules for calling into an anonymous class. The relaxed access |
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1034 // rule for the host class is applied in the opposite direction: A host class reflectively |
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1035 // access one of its anonymous classes. |
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1036 |
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1037 // If you load the same bytecodes twice, you get two different classes. You can reload |
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1038 // the same bytecodes with or without varying CP patches. |
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1039 |
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1040 // By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
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1041 // The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
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1042 // The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
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1043 |
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1044 // This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
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1045 // an outer class (so that U2 is an anonymous inner class of anonymous U1). |
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1046 // It is not possible for a named class, or an older anonymous class, to refer by |
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1047 // name (via its CP) to a newer anonymous class. |
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1048 |
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1049 // CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
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1050 // or type descriptors used in the loaded anonymous class. |
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1051 |
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1052 // Finally, CP patching may be used to introduce "live" objects into the constant pool, |
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1053 // instead of "dead" strings. A compiled statement like println((Object)"hello") can |
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1054 // be changed to println(greeting), where greeting is an arbitrary object created before |
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1055 // the anonymous class is loaded. This is useful in dynamic languages, in which |
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1056 // various kinds of metaobjects must be introduced as constants into bytecode. |
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1057 // Note the cast (Object), which tells the verifier to expect an arbitrary object, |
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1058 // not just a literal string. For such ldc instructions, the verifier uses the |
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1059 // type Object instead of String, if the loaded constant is not in fact a String. |
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1060 |
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1061 static instanceKlassHandle |
431
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1062 Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
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1063 jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
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1064 HeapWord* *temp_alloc, |
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1065 TRAPS) { |
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1066 |
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1067 if (UsePerfData) { |
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1068 ClassLoader::unsafe_defineClassCallCounter()->inc(); |
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1069 } |
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1070 |
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1071 if (data == NULL) { |
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1072 THROW_0(vmSymbols::java_lang_NullPointerException()); |
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1073 } |
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1074 |
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1075 jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
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1076 jint word_length = (length + sizeof(HeapWord)-1) / sizeof(HeapWord); |
6197 | 1077 HeapWord* body = NEW_C_HEAP_ARRAY(HeapWord, word_length, mtInternal); |
431
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1078 if (body == NULL) { |
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1079 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
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1080 } |
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1081 |
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1082 // caller responsible to free it: |
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1083 (*temp_alloc) = body; |
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1084 |
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1085 { |
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1086 jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
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1087 Copy::conjoint_words((HeapWord*) array_base, body, word_length); |
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1088 } |
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1089 |
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1090 u1* class_bytes = (u1*) body; |
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1091 int class_bytes_length = (int) length; |
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1092 if (class_bytes_length < 0) class_bytes_length = 0; |
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1093 if (class_bytes == NULL |
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1094 || host_class == NULL |
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1095 || length != class_bytes_length) |
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1096 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1097 |
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1098 objArrayHandle cp_patches_h; |
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1099 if (cp_patches_jh != NULL) { |
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1100 oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
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1101 if (!p->is_objArray()) |
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1102 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1103 cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
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1104 } |
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1105 |
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1106 KlassHandle host_klass(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(host_class))); |
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1107 const char* host_source = host_klass->external_name(); |
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1108 Handle host_loader(THREAD, host_klass->class_loader()); |
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1109 Handle host_domain(THREAD, host_klass->protection_domain()); |
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1110 |
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1111 GrowableArray<Handle>* cp_patches = NULL; |
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1112 if (cp_patches_h.not_null()) { |
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1113 int alen = cp_patches_h->length(); |
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1114 for (int i = alen-1; i >= 0; i--) { |
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1115 oop p = cp_patches_h->obj_at(i); |
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1116 if (p != NULL) { |
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1117 Handle patch(THREAD, p); |
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1118 if (cp_patches == NULL) |
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1119 cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
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1120 cp_patches->at_put(i, patch); |
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1121 } |
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1122 } |
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1123 } |
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1124 |
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1125 ClassFileStream st(class_bytes, class_bytes_length, (char*) host_source); |
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1126 |
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1127 instanceKlassHandle anon_klass; |
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1128 { |
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1129 Symbol* no_class_name = NULL; |
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1130 Klass* anonk = SystemDictionary::parse_stream(no_class_name, |
431
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1131 host_loader, host_domain, |
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1132 &st, host_klass, cp_patches, |
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1133 CHECK_NULL); |
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1134 if (anonk == NULL) return NULL; |
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1135 anon_klass = instanceKlassHandle(THREAD, anonk); |
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1136 } |
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1137 |
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1138 return anon_klass; |
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1139 } |
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1140 |
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1141 UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) |
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1142 { |
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1143 instanceKlassHandle anon_klass; |
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1144 jobject res_jh = NULL; |
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1145 |
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1146 UnsafeWrapper("Unsafe_DefineAnonymousClass"); |
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1147 ResourceMark rm(THREAD); |
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1148 |
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1149 HeapWord* temp_alloc = NULL; |
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1150 |
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1151 anon_klass = Unsafe_DefineAnonymousClass_impl(env, host_class, data, |
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1152 cp_patches_jh, |
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1153 &temp_alloc, THREAD); |
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1154 if (anon_klass() != NULL) |
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1155 res_jh = JNIHandles::make_local(env, anon_klass->java_mirror()); |
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1156 |
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1157 // try/finally clause: |
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1158 if (temp_alloc != NULL) { |
6197 | 1159 FREE_C_HEAP_ARRAY(HeapWord, temp_alloc, mtInternal); |
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1160 } |
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1161 |
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1162 // The anonymous class loader data has been artificially been kept alive to |
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1163 // this point. The mirror and any instances of this class have to keep |
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1164 // it alive afterwards. |
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1165 if (anon_klass() != NULL) { |
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1166 anon_klass->class_loader_data()->set_keep_alive(false); |
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1167 } |
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1168 |
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1169 // let caller initialize it as needed... |
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1170 |
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1171 return (jclass) res_jh; |
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1172 } |
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1173 UNSAFE_END |
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1174 |
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1175 |
0 | 1176 |
1177 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1178 UnsafeWrapper("Unsafe_MonitorEnter"); | |
1179 { | |
1180 if (jobj == NULL) { | |
1181 THROW(vmSymbols::java_lang_NullPointerException()); | |
1182 } | |
1183 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1184 ObjectSynchronizer::jni_enter(obj, CHECK); | |
1185 } | |
1186 UNSAFE_END | |
1187 | |
1188 | |
1189 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1190 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
1191 { | |
1192 if (jobj == NULL) { | |
1193 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
1194 } | |
1195 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1196 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
1197 return (res ? JNI_TRUE : JNI_FALSE); | |
1198 } | |
1199 UNSAFE_END | |
1200 | |
1201 | |
1202 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1203 UnsafeWrapper("Unsafe_MonitorExit"); | |
1204 { | |
1205 if (jobj == NULL) { | |
1206 THROW(vmSymbols::java_lang_NullPointerException()); | |
1207 } | |
1208 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
1209 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
1210 } | |
1211 UNSAFE_END | |
1212 | |
1213 | |
1214 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
1215 UnsafeWrapper("Unsafe_ThrowException"); | |
1216 { | |
1217 ThreadToNativeFromVM ttnfv(thread); | |
1218 env->Throw(thr); | |
1219 } | |
1220 UNSAFE_END | |
1221 | |
1222 // JSR166 ------------------------------------------------------------------ | |
1223 | |
1224 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
1225 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
1226 oop x = JNIHandles::resolve(x_h); | |
1227 oop e = JNIHandles::resolve(e_h); | |
1228 oop p = JNIHandles::resolve(obj); | |
113
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1229 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
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1230 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e, true); |
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1231 jboolean success = (res == e); |
0 | 1232 if (success) |
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1233 update_barrier_set((void*)addr, x); |
0 | 1234 return success; |
1235 UNSAFE_END | |
1236 | |
1237 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
1238 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
1239 oop p = JNIHandles::resolve(obj); | |
1240 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
1241 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
1242 UNSAFE_END | |
1243 | |
1244 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
1245 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
1246 Handle p (THREAD, JNIHandles::resolve(obj)); | |
1247 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
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1248 #ifdef SUPPORTS_NATIVE_CX8 |
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1249 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; |
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1250 #else |
0 | 1251 if (VM_Version::supports_cx8()) |
1252 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
1253 else { | |
1254 jboolean success = false; | |
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1255 MutexLockerEx mu(UnsafeJlong_lock, Mutex::_no_safepoint_check_flag); |
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1256 jlong val = Atomic::load(addr); |
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1257 if (val == e) { Atomic::store(x, addr); success = true; } |
0 | 1258 return success; |
1259 } | |
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1260 #endif |
0 | 1261 UNSAFE_END |
1262 | |
1263 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
1264 UnsafeWrapper("Unsafe_Park"); | |
10405 | 1265 EventThreadPark event; |
4006 | 1266 #ifndef USDT2 |
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1267 HS_DTRACE_PROBE3(hotspot, thread__park__begin, thread->parker(), (int) isAbsolute, time); |
4006 | 1268 #else /* USDT2 */ |
1269 HOTSPOT_THREAD_PARK_BEGIN( | |
1270 (uintptr_t) thread->parker(), (int) isAbsolute, time); | |
1271 #endif /* USDT2 */ | |
0 | 1272 JavaThreadParkedState jtps(thread, time != 0); |
1273 thread->parker()->park(isAbsolute != 0, time); | |
4006 | 1274 #ifndef USDT2 |
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1275 HS_DTRACE_PROBE1(hotspot, thread__park__end, thread->parker()); |
4006 | 1276 #else /* USDT2 */ |
1277 HOTSPOT_THREAD_PARK_END( | |
1278 (uintptr_t) thread->parker()); | |
1279 #endif /* USDT2 */ | |
10405 | 1280 if (event.should_commit()) { |
1281 oop obj = thread->current_park_blocker(); | |
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1282 event.set_klass((obj != NULL) ? obj->klass() : NULL); |
10405 | 1283 event.set_timeout(time); |
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1284 event.set_address((obj != NULL) ? (TYPE_ADDRESS) cast_from_oop<uintptr_t>(obj) : 0); |
10405 | 1285 event.commit(); |
1286 } | |
0 | 1287 UNSAFE_END |
1288 | |
1289 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
1290 UnsafeWrapper("Unsafe_Unpark"); | |
1291 Parker* p = NULL; | |
1292 if (jthread != NULL) { | |
1293 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
1294 if (java_thread != NULL) { | |
1295 jlong lp = java_lang_Thread::park_event(java_thread); | |
1296 if (lp != 0) { | |
1297 // This cast is OK even though the jlong might have been read | |
1298 // non-atomically on 32bit systems, since there, one word will | |
1299 // always be zero anyway and the value set is always the same | |
1300 p = (Parker*)addr_from_java(lp); | |
1301 } else { | |
1302 // Grab lock if apparently null or using older version of library | |
1303 MutexLocker mu(Threads_lock); | |
1304 java_thread = JNIHandles::resolve_non_null(jthread); | |
1305 if (java_thread != NULL) { | |
1306 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
1307 if (thr != NULL) { | |
1308 p = thr->parker(); | |
1309 if (p != NULL) { // Bind to Java thread for next time. | |
1310 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
1311 } | |
1312 } | |
1313 } | |
1314 } | |
1315 } | |
1316 } | |
1317 if (p != NULL) { | |
4006 | 1318 #ifndef USDT2 |
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1319 HS_DTRACE_PROBE1(hotspot, thread__unpark, p); |
4006 | 1320 #else /* USDT2 */ |
1321 HOTSPOT_THREAD_UNPARK( | |
1322 (uintptr_t) p); | |
1323 #endif /* USDT2 */ | |
0 | 1324 p->unpark(); |
1325 } | |
1326 UNSAFE_END | |
1327 | |
1328 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
1329 UnsafeWrapper("Unsafe_Loadavg"); | |
1330 const int max_nelem = 3; | |
1331 double la[max_nelem]; | |
1332 jint ret; | |
1333 | |
1334 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
1335 assert(a->is_typeArray(), "must be type array"); | |
1336 | |
1337 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
1338 ThreadToNativeFromVM ttnfv(thread); | |
1339 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
1340 return -1; | |
1341 } | |
1342 | |
1343 ret = os::loadavg(la, nelem); | |
1344 if (ret == -1) return -1; | |
1345 | |
1346 // if successful, ret is the number of samples actually retrieved. | |
1347 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
1348 switch(ret) { | |
1349 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
1350 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
1351 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
1352 } | |
1353 return ret; | |
1354 UNSAFE_END | |
1355 | |
1356 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1357 UnsafeWrapper("Unsafe_PrefetchRead"); | |
1358 oop p = JNIHandles::resolve(obj); | |
1359 void* addr = index_oop_from_field_offset_long(p, 0); | |
1360 Prefetch::read(addr, (intx)offset); | |
1361 UNSAFE_END | |
1362 | |
1363 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1364 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
1365 oop p = JNIHandles::resolve(obj); | |
1366 void* addr = index_oop_from_field_offset_long(p, 0); | |
1367 Prefetch::write(addr, (intx)offset); | |
1368 UNSAFE_END | |
1369 | |
1370 | |
1371 /// JVM_RegisterUnsafeMethods | |
1372 | |
1373 #define ADR "J" | |
1374 | |
1375 #define LANG "Ljava/lang/" | |
1376 | |
1377 #define OBJ LANG"Object;" | |
1378 #define CLS LANG"Class;" | |
1379 #define CTR LANG"reflect/Constructor;" | |
1380 #define FLD LANG"reflect/Field;" | |
1381 #define MTH LANG"reflect/Method;" | |
1382 #define THR LANG"Throwable;" | |
1383 | |
1384 #define DC0_Args LANG"String;[BII" | |
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1385 #define DC_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" |
0 | 1386 |
1387 #define CC (char*) /*cast a literal from (const char*)*/ | |
1388 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
1389 | |
1390 // define deprecated accessors for compabitility with 1.4.0 | |
1391 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
1392 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
1393 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
1394 | |
1395 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
1396 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
1397 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1398 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
1399 | |
1400 // Note: In 1.5.0, there are volatile versions too | |
1401 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
1402 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1403 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
1404 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
1405 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
1406 | |
1407 | |
1408 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
1409 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
1410 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
1411 | |
1412 | |
1413 | |
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1414 // These are the methods for 1.4.0 |
0 | 1415 static JNINativeMethod methods_140[] = { |
1416 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
1417 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
1418 | |
1419 DECLARE_GETSETOOP_140(Boolean, Z), | |
1420 DECLARE_GETSETOOP_140(Byte, B), | |
1421 DECLARE_GETSETOOP_140(Short, S), | |
1422 DECLARE_GETSETOOP_140(Char, C), | |
1423 DECLARE_GETSETOOP_140(Int, I), | |
1424 DECLARE_GETSETOOP_140(Long, J), | |
1425 DECLARE_GETSETOOP_140(Float, F), | |
1426 DECLARE_GETSETOOP_140(Double, D), | |
1427 | |
1428 DECLARE_GETSETNATIVE(Byte, B), | |
1429 DECLARE_GETSETNATIVE(Short, S), | |
1430 DECLARE_GETSETNATIVE(Char, C), | |
1431 DECLARE_GETSETNATIVE(Int, I), | |
1432 DECLARE_GETSETNATIVE(Long, J), | |
1433 DECLARE_GETSETNATIVE(Float, F), | |
1434 DECLARE_GETSETNATIVE(Double, D), | |
1435 | |
1436 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1437 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1438 | |
1439 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1440 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1441 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1442 | |
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1443 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, |
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1444 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, |
0 | 1445 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
1446 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1447 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1448 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1449 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1450 | |
1451 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1452 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1453 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1454 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1455 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1456 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1457 }; | |
1458 | |
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1459 // These are the methods prior to the JSR 166 changes in 1.5.0 |
0 | 1460 static JNINativeMethod methods_141[] = { |
1461 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1462 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1463 | |
1464 DECLARE_GETSETOOP_141(Boolean, Z), | |
1465 DECLARE_GETSETOOP_141(Byte, B), | |
1466 DECLARE_GETSETOOP_141(Short, S), | |
1467 DECLARE_GETSETOOP_141(Char, C), | |
1468 DECLARE_GETSETOOP_141(Int, I), | |
1469 DECLARE_GETSETOOP_141(Long, J), | |
1470 DECLARE_GETSETOOP_141(Float, F), | |
1471 DECLARE_GETSETOOP_141(Double, D), | |
1472 | |
1473 DECLARE_GETSETNATIVE(Byte, B), | |
1474 DECLARE_GETSETNATIVE(Short, S), | |
1475 DECLARE_GETSETNATIVE(Char, C), | |
1476 DECLARE_GETSETNATIVE(Int, I), | |
1477 DECLARE_GETSETNATIVE(Long, J), | |
1478 DECLARE_GETSETNATIVE(Float, F), | |
1479 DECLARE_GETSETNATIVE(Double, D), | |
1480 | |
1481 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1482 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1483 | |
1484 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1485 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1486 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1487 | |
1488 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1489 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1490 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1491 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1492 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1493 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1494 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1495 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1496 | |
1497 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1498 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1499 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1500 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1501 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1502 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1503 | |
1504 }; | |
1505 | |
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1506 // These are the methods prior to the JSR 166 changes in 1.6.0 |
0 | 1507 static JNINativeMethod methods_15[] = { |
1508 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1509 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1510 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1511 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1512 | |
1513 | |
1514 DECLARE_GETSETOOP(Boolean, Z), | |
1515 DECLARE_GETSETOOP(Byte, B), | |
1516 DECLARE_GETSETOOP(Short, S), | |
1517 DECLARE_GETSETOOP(Char, C), | |
1518 DECLARE_GETSETOOP(Int, I), | |
1519 DECLARE_GETSETOOP(Long, J), | |
1520 DECLARE_GETSETOOP(Float, F), | |
1521 DECLARE_GETSETOOP(Double, D), | |
1522 | |
1523 DECLARE_GETSETNATIVE(Byte, B), | |
1524 DECLARE_GETSETNATIVE(Short, S), | |
1525 DECLARE_GETSETNATIVE(Char, C), | |
1526 DECLARE_GETSETNATIVE(Int, I), | |
1527 DECLARE_GETSETNATIVE(Long, J), | |
1528 DECLARE_GETSETNATIVE(Float, F), | |
1529 DECLARE_GETSETNATIVE(Double, D), | |
1530 | |
1531 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1532 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1533 | |
1534 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1535 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1536 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1537 | |
1538 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1539 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1540 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1541 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1542 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1543 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1544 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1545 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1546 | |
1547 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1548 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1549 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1550 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1551 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1552 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1553 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1554 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1555 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1556 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1557 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1558 | |
1559 }; | |
1560 | |
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1561 // These are the methods for 1.6.0 and 1.7.0 |
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1562 static JNINativeMethod methods_16[] = { |
0 | 1563 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
1564 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1565 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1566 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1567 | |
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1568 DECLARE_GETSETOOP(Boolean, Z), |
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1569 DECLARE_GETSETOOP(Byte, B), |
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1570 DECLARE_GETSETOOP(Short, S), |
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1571 DECLARE_GETSETOOP(Char, C), |
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1572 DECLARE_GETSETOOP(Int, I), |
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1573 DECLARE_GETSETOOP(Long, J), |
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1574 DECLARE_GETSETOOP(Float, F), |
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1575 DECLARE_GETSETOOP(Double, D), |
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1576 |
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1577 DECLARE_GETSETNATIVE(Byte, B), |
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1578 DECLARE_GETSETNATIVE(Short, S), |
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1579 DECLARE_GETSETNATIVE(Char, C), |
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1580 DECLARE_GETSETNATIVE(Int, I), |
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1581 DECLARE_GETSETNATIVE(Long, J), |
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1582 DECLARE_GETSETNATIVE(Float, F), |
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1583 DECLARE_GETSETNATIVE(Double, D), |
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1584 |
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1585 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, |
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1586 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, |
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1587 |
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1588 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, |
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1589 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, |
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1590 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, |
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1591 |
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1592 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, |
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1593 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, |
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1594 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, |
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1595 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
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1596 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, |
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1597 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, |
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1598 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, |
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1599 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, |
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1600 |
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1601 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, |
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1602 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
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1603 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
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1604 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, |
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1605 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, |
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1606 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, |
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1607 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, |
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1608 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, |
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1609 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, |
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1610 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, |
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1611 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, |
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1612 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, |
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1613 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, |
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1614 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, |
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1615 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} |
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1616 }; |
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1617 |
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1618 // These are the methods for 1.8.0 |
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1619 static JNINativeMethod methods_18[] = { |
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1620 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
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1621 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, |
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1622 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, |
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1623 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, |
0 | 1624 |
1625 DECLARE_GETSETOOP(Boolean, Z), | |
1626 DECLARE_GETSETOOP(Byte, B), | |
1627 DECLARE_GETSETOOP(Short, S), | |
1628 DECLARE_GETSETOOP(Char, C), | |
1629 DECLARE_GETSETOOP(Int, I), | |
1630 DECLARE_GETSETOOP(Long, J), | |
1631 DECLARE_GETSETOOP(Float, F), | |
1632 DECLARE_GETSETOOP(Double, D), | |
1633 | |
1634 DECLARE_GETSETNATIVE(Byte, B), | |
1635 DECLARE_GETSETNATIVE(Short, S), | |
1636 DECLARE_GETSETNATIVE(Char, C), | |
1637 DECLARE_GETSETNATIVE(Int, I), | |
1638 DECLARE_GETSETNATIVE(Long, J), | |
1639 DECLARE_GETSETNATIVE(Float, F), | |
1640 DECLARE_GETSETNATIVE(Double, D), | |
1641 | |
1642 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1643 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1644 | |
1645 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1646 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1647 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1648 | |
1649 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1650 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1651 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1652 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1653 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1654 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1655 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1656 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1657 | |
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1658 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1659 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1660 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1661 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1662 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
1663 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1664 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1665 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1666 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1667 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
1668 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
1669 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
1670 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1671 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1672 }; | |
1673 | |
1674 JNINativeMethod loadavg_method[] = { | |
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1675 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} |
0 | 1676 }; |
1677 | |
1678 JNINativeMethod prefetch_methods[] = { | |
1679 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1680 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
1681 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1682 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1683 }; | |
1684 | |
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1685 JNINativeMethod memcopy_methods_17[] = { |
0 | 1686 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, |
1687 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
1688 }; | |
1689 | |
1690 JNINativeMethod memcopy_methods_15[] = { | |
1691 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1692 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
1693 }; | |
1694 | |
431
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1695 JNINativeMethod anonk_methods[] = { |
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1696 {CC"defineAnonymousClass", CC"("DAC_Args")"CLS, FN_PTR(Unsafe_DefineAnonymousClass)}, |
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1697 }; |
0 | 1698 |
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1699 JNINativeMethod lform_methods[] = { |
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1700 {CC"shouldBeInitialized",CC"("CLS")Z", FN_PTR(Unsafe_ShouldBeInitialized)}, |
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1701 }; |
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1702 |
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1703 JNINativeMethod fence_methods[] = { |
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1704 {CC"loadFence", CC"()V", FN_PTR(Unsafe_LoadFence)}, |
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1705 {CC"storeFence", CC"()V", FN_PTR(Unsafe_StoreFence)}, |
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1706 {CC"fullFence", CC"()V", FN_PTR(Unsafe_FullFence)}, |
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1707 }; |
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1708 |
0 | 1709 #undef CC |
1710 #undef FN_PTR | |
1711 | |
1712 #undef ADR | |
1713 #undef LANG | |
1714 #undef OBJ | |
1715 #undef CLS | |
1716 #undef CTR | |
1717 #undef FLD | |
1718 #undef MTH | |
1719 #undef THR | |
1720 #undef DC0_Args | |
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1721 #undef DC_Args |
0 | 1722 |
1723 #undef DECLARE_GETSETOOP | |
1724 #undef DECLARE_GETSETNATIVE | |
1725 | |
1726 | |
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1727 /** |
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1728 * Helper method to register native methods. |
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1729 */ |
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1730 static bool register_natives(const char* message, JNIEnv* env, jclass clazz, const JNINativeMethod* methods, jint nMethods) { |
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1731 int status = env->RegisterNatives(clazz, methods, nMethods); |
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1732 if (status < 0 || env->ExceptionOccurred()) { |
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1733 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1734 tty->print_cr("Unsafe: failed registering %s", message); |
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1735 } |
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1736 env->ExceptionClear(); |
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1737 return false; |
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1738 } else { |
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1739 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1740 tty->print_cr("Unsafe: successfully registered %s", message); |
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1741 } |
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1742 return true; |
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1743 } |
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1744 } |
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1745 |
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1746 |
0 | 1747 // This one function is exported, used by NativeLookup. |
1748 // The Unsafe_xxx functions above are called only from the interpreter. | |
1749 // The optimizer looks at names and signatures to recognize | |
1750 // individual functions. | |
1751 | |
1752 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
1753 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
1754 { | |
1755 ThreadToNativeFromVM ttnfv(thread); | |
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1756 |
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1757 // Unsafe methods |
0 | 1758 { |
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1759 bool success = false; |
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1760 // 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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1761 if (!success) { |
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1762 success = register_natives("1.6 methods", env, unsafecls, methods_16, sizeof(methods_16)/sizeof(JNINativeMethod)); |
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1763 } |
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1764 if (!success) { |
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1765 success = register_natives("1.8 methods", env, unsafecls, methods_18, sizeof(methods_18)/sizeof(JNINativeMethod)); |
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1766 } |
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1767 if (!success) { |
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1768 success = register_natives("1.5 methods", env, unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); |
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1769 } |
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1770 if (!success) { |
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1771 success = register_natives("1.4.1 methods", env, unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); |
0 | 1772 } |
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1773 if (!success) { |
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1774 success = register_natives("1.4.0 methods", env, unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); |
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1775 } |
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1776 guarantee(success, "register unsafe natives"); |
0 | 1777 } |
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1778 |
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1779 // Unsafe.getLoadAverage |
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1780 register_natives("1.6 loadavg method", env, unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); |
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1781 |
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1782 // Prefetch methods |
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1783 register_natives("1.6 prefetch methods", env, unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); |
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1784 |
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1785 // Memory copy methods |
0 | 1786 { |
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1787 bool success = false; |
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1788 if (!success) { |
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1789 success = register_natives("1.7 memory copy methods", env, unsafecls, memcopy_methods_17, sizeof(memcopy_methods_17)/sizeof(JNINativeMethod)); |
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1790 } |
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1791 if (!success) { |
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1792 success = register_natives("1.5 memory copy methods", env, unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); |
0 | 1793 } |
1794 } | |
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1795 |
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1796 // Unsafe.defineAnonymousClass |
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1797 if (EnableInvokeDynamic) { |
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1798 register_natives("1.7 define anonymous class method", env, unsafecls, anonk_methods, sizeof(anonk_methods)/sizeof(JNINativeMethod)); |
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1799 } |
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1800 |
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1801 // Unsafe.shouldBeInitialized |
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1802 if (EnableInvokeDynamic) { |
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1803 register_natives("1.7 LambdaForm support", env, unsafecls, lform_methods, sizeof(lform_methods)/sizeof(JNINativeMethod)); |
0 | 1804 } |
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1805 |
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1806 // Fence methods |
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1807 register_natives("1.8 fence methods", env, unsafecls, fence_methods, sizeof(fence_methods)/sizeof(JNINativeMethod)); |
0 | 1808 } |
1809 JVM_END |