Mercurial > hg > truffle
annotate src/share/vm/prims/unsafe.cpp @ 21936:49dad3e40b57
Convert addresses in ArrayCopyCallNode to word size
author | Stefan Anzinger <stefan.anzinger@oracle.com> |
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date | Fri, 12 Jun 2015 14:52:08 +0200 |
parents | 7848fc12602b |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/vmSymbols.hpp" | |
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27 #include "utilities/macros.hpp" |
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28 #if INCLUDE_ALL_GCS |
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29 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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30 #endif // INCLUDE_ALL_GCS |
1972 | 31 #include "memory/allocation.inline.hpp" |
32 #include "prims/jni.h" | |
33 #include "prims/jvm.h" | |
34 #include "runtime/globals.hpp" | |
35 #include "runtime/interfaceSupport.hpp" | |
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36 #include "runtime/prefetch.inline.hpp" |
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37 #include "runtime/orderAccess.inline.hpp" |
1972 | 38 #include "runtime/reflection.hpp" |
39 #include "runtime/synchronizer.hpp" | |
40 #include "services/threadService.hpp" | |
10405 | 41 #include "trace/tracing.hpp" |
1972 | 42 #include "utilities/copy.hpp" |
43 #include "utilities/dtrace.hpp" | |
44 | |
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45 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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46 |
0 | 47 /* |
48 * Implementation of class sun.misc.Unsafe | |
49 */ | |
50 | |
4006 | 51 #ifndef USDT2 |
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52 HS_DTRACE_PROBE_DECL3(hotspot, thread__park__begin, uintptr_t, int, long long); |
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53 HS_DTRACE_PROBE_DECL1(hotspot, thread__park__end, uintptr_t); |
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54 HS_DTRACE_PROBE_DECL1(hotspot, thread__unpark, uintptr_t); |
4006 | 55 #endif /* !USDT2 */ |
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56 |
0 | 57 #define MAX_OBJECT_SIZE \ |
58 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ | |
59 + ((julong)max_jint * sizeof(double)) ) | |
60 | |
61 | |
62 #define UNSAFE_ENTRY(result_type, header) \ | |
63 JVM_ENTRY(result_type, header) | |
64 | |
65 // Can't use UNSAFE_LEAF because it has the signature of a straight | |
66 // call into the runtime (just like JVM_LEAF, funny that) but it's | |
67 // called like a Java Native and thus the wrapper built for it passes | |
68 // arguments like a JNI call. It expects those arguments to be popped | |
69 // from the stack on Intel like all good JNI args are, and adjusts the | |
70 // stack according. Since the JVM_LEAF call expects no extra | |
71 // arguments the stack isn't popped in the C code, is pushed by the | |
72 // wrapper and we get sick. | |
73 //#define UNSAFE_LEAF(result_type, header) \ | |
74 // JVM_LEAF(result_type, header) | |
75 | |
76 #define UNSAFE_END JVM_END | |
77 | |
78 #define UnsafeWrapper(arg) /*nothing, for the present*/ | |
79 | |
80 | |
81 inline void* addr_from_java(jlong addr) { | |
82 // This assert fails in a variety of ways on 32-bit systems. | |
83 // It is impossible to predict whether native code that converts | |
84 // pointers to longs will sign-extend or zero-extend the addresses. | |
85 //assert(addr == (uintptr_t)addr, "must not be odd high bits"); | |
86 return (void*)(uintptr_t)addr; | |
87 } | |
88 | |
89 inline jlong addr_to_java(void* p) { | |
90 assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); | |
91 return (uintptr_t)p; | |
92 } | |
93 | |
94 | |
95 // Note: The VM's obj_field and related accessors use byte-scaled | |
96 // ("unscaled") offsets, just as the unsafe methods do. | |
97 | |
98 // However, the method Unsafe.fieldOffset explicitly declines to | |
99 // guarantee this. The field offset values manipulated by the Java user | |
100 // through the Unsafe API are opaque cookies that just happen to be byte | |
101 // offsets. We represent this state of affairs by passing the cookies | |
102 // through conversion functions when going between the VM and the Unsafe API. | |
103 // The conversion functions just happen to be no-ops at present. | |
104 | |
105 inline jlong field_offset_to_byte_offset(jlong field_offset) { | |
106 return field_offset; | |
107 } | |
108 | |
109 inline jlong field_offset_from_byte_offset(jlong byte_offset) { | |
110 return byte_offset; | |
111 } | |
112 | |
113 inline jint invocation_key_from_method_slot(jint slot) { | |
114 return slot; | |
115 } | |
116 | |
117 inline jint invocation_key_to_method_slot(jint key) { | |
118 return key; | |
119 } | |
120 | |
121 inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { | |
122 jlong byte_offset = field_offset_to_byte_offset(field_offset); | |
123 #ifdef ASSERT | |
124 if (p != NULL) { | |
125 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
126 if (byte_offset == (jint)byte_offset) { | |
127 void* ptr_plus_disp = (address)p + byte_offset; | |
113
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128 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
0 | 129 "raw [ptr+disp] must be consistent with oop::field_base"); |
130 } | |
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131 jlong p_size = HeapWordSize * (jlong)(p->size()); |
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132 assert(byte_offset < p_size, err_msg("Unsafe access: offset " INT64_FORMAT " > object's size " INT64_FORMAT, byte_offset, p_size)); |
0 | 133 } |
134 #endif | |
135 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
136 return (address)p + (jint) byte_offset; | |
137 else | |
138 return (address)p + byte_offset; | |
139 } | |
140 | |
141 // Externally callable versions: | |
142 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
143 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
144 return field_offset; | |
145 } | |
146 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
147 return byte_offset; | |
148 } | |
149 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
150 return invocation_key_from_method_slot(slot); | |
151 } | |
152 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
153 return invocation_key_to_method_slot(key); | |
154 } | |
155 | |
156 | |
157 ///// Data in the Java heap. | |
158 | |
159 #define GET_FIELD(obj, offset, type_name, v) \ | |
160 oop p = JNIHandles::resolve(obj); \ | |
161 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
162 | |
163 #define SET_FIELD(obj, offset, type_name, x) \ | |
164 oop p = JNIHandles::resolve(obj); \ | |
165 *(type_name*)index_oop_from_field_offset_long(p, offset) = x | |
166 | |
167 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
168 oop p = JNIHandles::resolve(obj); \ | |
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169 if (support_IRIW_for_not_multiple_copy_atomic_cpu) { \ |
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170 OrderAccess::fence(); \ |
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171 } \ |
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172 volatile type_name v = OrderAccess::load_acquire((volatile type_name*)index_oop_from_field_offset_long(p, offset)); |
0 | 173 |
174 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
175 oop p = JNIHandles::resolve(obj); \ | |
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176 OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), x); |
0 | 177 |
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178 // Macros for oops that check UseCompressedOops |
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179 |
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180 #define GET_OOP_FIELD(obj, offset, v) \ |
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181 oop p = JNIHandles::resolve(obj); \ |
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182 oop v; \ |
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183 if (UseCompressedOops) { \ |
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184 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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185 v = oopDesc::decode_heap_oop(n); \ |
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186 } else { \ |
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187 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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188 } |
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189 |
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190 |
0 | 191 // Get/SetObject must be special-cased, since it works with handles. |
192 | |
193 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
194 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
195 UnsafeWrapper("Unsafe_GetObject"); | |
196 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
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197 GET_OOP_FIELD(obj, offset, v) |
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198 jobject ret = JNIHandles::make_local(env, v); |
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199 #if INCLUDE_ALL_GCS |
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200 // We could be accessing the referent field in a reference |
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201 // object. If G1 is enabled then we need to register a non-null |
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202 // referent with the SATB barrier. |
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203 if (UseG1GC) { |
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204 bool needs_barrier = false; |
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205 |
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206 if (ret != NULL) { |
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207 if (offset == java_lang_ref_Reference::referent_offset) { |
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208 oop o = JNIHandles::resolve_non_null(obj); |
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209 Klass* k = o->klass(); |
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210 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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211 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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212 needs_barrier = true; |
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213 } |
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214 } |
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215 } |
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216 |
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217 if (needs_barrier) { |
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218 oop referent = JNIHandles::resolve(ret); |
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219 G1SATBCardTableModRefBS::enqueue(referent); |
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220 } |
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221 } |
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222 #endif // INCLUDE_ALL_GCS |
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223 return ret; |
0 | 224 UNSAFE_END |
225 | |
226 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
227 UnsafeWrapper("Unsafe_SetObject"); | |
228 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
229 oop x = JNIHandles::resolve(x_h); | |
230 //SET_FIELD(obj, offset, oop, x); | |
231 oop p = JNIHandles::resolve(obj); | |
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232 if (UseCompressedOops) { |
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233 if (x != NULL) { |
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234 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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235 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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236 } else { |
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237 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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238 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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239 } |
0 | 240 } else { |
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241 if (x != NULL) { |
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242 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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243 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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244 } else { |
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245 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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246 } |
0 | 247 } |
248 UNSAFE_END | |
249 | |
250 // The normal variants allow a null base pointer with an arbitrary address. | |
251 // But if the base pointer is non-null, the offset should make some sense. | |
252 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
253 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
254 UnsafeWrapper("Unsafe_GetObject"); | |
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255 GET_OOP_FIELD(obj, offset, v) |
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256 jobject ret = JNIHandles::make_local(env, v); |
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257 #if INCLUDE_ALL_GCS |
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258 // We could be accessing the referent field in a reference |
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259 // object. If G1 is enabled then we need to register non-null |
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260 // referent with the SATB barrier. |
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261 if (UseG1GC) { |
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262 bool needs_barrier = false; |
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263 |
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264 if (ret != NULL) { |
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265 if (offset == java_lang_ref_Reference::referent_offset && obj != NULL) { |
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266 oop o = JNIHandles::resolve(obj); |
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267 Klass* k = o->klass(); |
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268 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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269 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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270 needs_barrier = true; |
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271 } |
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272 } |
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273 } |
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274 |
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275 if (needs_barrier) { |
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276 oop referent = JNIHandles::resolve(ret); |
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277 G1SATBCardTableModRefBS::enqueue(referent); |
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278 } |
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279 } |
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280 #endif // INCLUDE_ALL_GCS |
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281 return ret; |
0 | 282 UNSAFE_END |
283 | |
284 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
285 UnsafeWrapper("Unsafe_SetObject"); | |
286 oop x = JNIHandles::resolve(x_h); | |
287 oop p = JNIHandles::resolve(obj); | |
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288 if (UseCompressedOops) { |
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289 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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290 } else { |
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291 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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292 } |
0 | 293 UNSAFE_END |
294 | |
295 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
296 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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297 oop p = JNIHandles::resolve(obj); |
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298 void* addr = index_oop_from_field_offset_long(p, offset); |
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299 volatile oop v; |
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300 if (UseCompressedOops) { |
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301 volatile narrowOop n = *(volatile narrowOop*) addr; |
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302 (void)const_cast<oop&>(v = oopDesc::decode_heap_oop(n)); |
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303 } else { |
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304 (void)const_cast<oop&>(v = *(volatile oop*) addr); |
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305 } |
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306 OrderAccess::acquire(); |
0 | 307 return JNIHandles::make_local(env, v); |
308 UNSAFE_END | |
309 | |
310 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
311 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
312 oop x = JNIHandles::resolve(x_h); | |
313 oop p = JNIHandles::resolve(obj); | |
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314 void* addr = index_oop_from_field_offset_long(p, offset); |
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315 OrderAccess::release(); |
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316 if (UseCompressedOops) { |
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317 oop_store((narrowOop*)addr, x); |
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318 } else { |
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319 oop_store((oop*)addr, x); |
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320 } |
0 | 321 OrderAccess::fence(); |
322 UNSAFE_END | |
323 | |
10235 | 324 #ifndef SUPPORTS_NATIVE_CX8 |
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325 // Keep old code for platforms which may not have atomic jlong (8 bytes) instructions |
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326 |
0 | 327 // Volatile long versions must use locks if !VM_Version::supports_cx8(). |
328 // support_cx8 is a surrogate for 'supports atomic long memory ops'. | |
329 | |
330 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
331 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
332 { | |
333 if (VM_Version::supports_cx8()) { | |
334 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
335 return v; | |
336 } | |
337 else { | |
338 Handle p (THREAD, JNIHandles::resolve(obj)); | |
339 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
340 ObjectLocker ol(p, THREAD); | |
341 jlong value = *addr; | |
342 return value; | |
343 } | |
344 } | |
345 UNSAFE_END | |
346 | |
347 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
348 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
349 { | |
350 if (VM_Version::supports_cx8()) { | |
351 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
352 } | |
353 else { | |
354 Handle p (THREAD, JNIHandles::resolve(obj)); | |
355 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
356 ObjectLocker ol(p, THREAD); | |
357 *addr = x; | |
358 } | |
359 } | |
360 UNSAFE_END | |
361 | |
10235 | 362 #endif // not SUPPORTS_NATIVE_CX8 |
0 | 363 |
364 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
365 \ | |
366 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
367 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
368 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
369 GET_FIELD(obj, offset, jboolean, v); \ | |
370 return v; \ | |
371 UNSAFE_END \ | |
372 \ | |
373 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
374 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
375 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
376 SET_FIELD(obj, offset, jboolean, x); \ | |
377 UNSAFE_END \ | |
378 \ | |
379 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
380 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
381 GET_FIELD(obj, offset, jboolean, v); \ | |
382 return v; \ | |
383 UNSAFE_END \ | |
384 \ | |
385 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
386 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
387 SET_FIELD(obj, offset, jboolean, x); \ | |
388 UNSAFE_END \ | |
389 \ | |
390 // END DEFINE_GETSETOOP. | |
391 | |
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392 DEFINE_GETSETOOP(jboolean, Boolean) |
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393 DEFINE_GETSETOOP(jbyte, Byte) |
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394 DEFINE_GETSETOOP(jshort, Short); |
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395 DEFINE_GETSETOOP(jchar, Char); |
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396 DEFINE_GETSETOOP(jint, Int); |
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397 DEFINE_GETSETOOP(jlong, Long); |
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398 DEFINE_GETSETOOP(jfloat, Float); |
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399 DEFINE_GETSETOOP(jdouble, Double); |
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400 |
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401 #undef DEFINE_GETSETOOP |
0 | 402 |
403 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
404 \ | |
405 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
406 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
407 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
408 return v; \ | |
409 UNSAFE_END \ | |
410 \ | |
411 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
412 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
413 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
414 UNSAFE_END \ | |
415 \ | |
416 // END DEFINE_GETSETOOP_VOLATILE. | |
417 | |
418 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
419 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
420 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
421 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
422 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
423 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
424 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
425 | |
10235 | 426 #ifdef SUPPORTS_NATIVE_CX8 |
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427 DEFINE_GETSETOOP_VOLATILE(jlong, Long); |
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428 #endif |
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429 |
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430 #undef DEFINE_GETSETOOP_VOLATILE |
0 | 431 |
432 // The non-intrinsified versions of setOrdered just use setVolatile | |
433 | |
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434 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) |
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435 UnsafeWrapper("Unsafe_SetOrderedInt"); |
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436 SET_FIELD_VOLATILE(obj, offset, jint, x); |
0 | 437 UNSAFE_END |
438 | |
439 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
440 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
441 oop x = JNIHandles::resolve(x_h); | |
442 oop p = JNIHandles::resolve(obj); | |
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443 void* addr = index_oop_from_field_offset_long(p, offset); |
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444 OrderAccess::release(); |
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445 if (UseCompressedOops) { |
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446 oop_store((narrowOop*)addr, x); |
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447 } else { |
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448 oop_store((oop*)addr, x); |
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449 } |
0 | 450 OrderAccess::fence(); |
451 UNSAFE_END | |
452 | |
453 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
454 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
10235 | 455 #ifdef SUPPORTS_NATIVE_CX8 |
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456 SET_FIELD_VOLATILE(obj, offset, jlong, x); |
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457 #else |
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458 // Keep old code for platforms which may not have atomic long (8 bytes) instructions |
0 | 459 { |
460 if (VM_Version::supports_cx8()) { | |
461 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
462 } | |
463 else { | |
464 Handle p (THREAD, JNIHandles::resolve(obj)); | |
465 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
466 ObjectLocker ol(p, THREAD); | |
467 *addr = x; | |
468 } | |
469 } | |
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470 #endif |
0 | 471 UNSAFE_END |
472 | |
7425 | 473 UNSAFE_ENTRY(void, Unsafe_LoadFence(JNIEnv *env, jobject unsafe)) |
474 UnsafeWrapper("Unsafe_LoadFence"); | |
475 OrderAccess::acquire(); | |
476 UNSAFE_END | |
477 | |
478 UNSAFE_ENTRY(void, Unsafe_StoreFence(JNIEnv *env, jobject unsafe)) | |
479 UnsafeWrapper("Unsafe_StoreFence"); | |
480 OrderAccess::release(); | |
481 UNSAFE_END | |
482 | |
483 UNSAFE_ENTRY(void, Unsafe_FullFence(JNIEnv *env, jobject unsafe)) | |
484 UnsafeWrapper("Unsafe_FullFence"); | |
485 OrderAccess::fence(); | |
486 UNSAFE_END | |
487 | |
0 | 488 ////// Data in the C heap. |
489 | |
490 // Note: These do not throw NullPointerException for bad pointers. | |
491 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
492 // | |
493 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
494 \ | |
495 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
496 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
497 void* p = addr_from_java(addr); \ | |
498 JavaThread* t = JavaThread::current(); \ | |
499 t->set_doing_unsafe_access(true); \ | |
500 java_type x = *(volatile native_type*)p; \ | |
501 t->set_doing_unsafe_access(false); \ | |
502 return x; \ | |
503 UNSAFE_END \ | |
504 \ | |
505 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
506 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
507 JavaThread* t = JavaThread::current(); \ | |
508 t->set_doing_unsafe_access(true); \ | |
509 void* p = addr_from_java(addr); \ | |
510 *(volatile native_type*)p = x; \ | |
511 t->set_doing_unsafe_access(false); \ | |
512 UNSAFE_END \ | |
513 \ | |
514 // END DEFINE_GETSETNATIVE. | |
515 | |
516 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
517 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
518 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
519 DEFINE_GETSETNATIVE(jint, Int, jint); | |
520 // no long -- handled specially | |
521 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
522 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
523 | |
524 #undef DEFINE_GETSETNATIVE | |
525 | |
526 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
527 UnsafeWrapper("Unsafe_GetNativeLong"); | |
528 JavaThread* t = JavaThread::current(); | |
529 // We do it this way to avoid problems with access to heap using 64 | |
530 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
531 // some CPUs (SPARC) it leads to SIGBUS. | |
532 t->set_doing_unsafe_access(true); | |
533 void* p = addr_from_java(addr); | |
534 jlong x; | |
535 if (((intptr_t)p & 7) == 0) { | |
536 // jlong is aligned, do a volatile access | |
537 x = *(volatile jlong*)p; | |
538 } else { | |
539 jlong_accessor acc; | |
540 acc.words[0] = ((volatile jint*)p)[0]; | |
541 acc.words[1] = ((volatile jint*)p)[1]; | |
542 x = acc.long_value; | |
543 } | |
544 t->set_doing_unsafe_access(false); | |
545 return x; | |
546 UNSAFE_END | |
547 | |
548 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
549 UnsafeWrapper("Unsafe_SetNativeLong"); | |
550 JavaThread* t = JavaThread::current(); | |
551 // see comment for Unsafe_GetNativeLong | |
552 t->set_doing_unsafe_access(true); | |
553 void* p = addr_from_java(addr); | |
554 if (((intptr_t)p & 7) == 0) { | |
555 // jlong is aligned, do a volatile access | |
556 *(volatile jlong*)p = x; | |
557 } else { | |
558 jlong_accessor acc; | |
559 acc.long_value = x; | |
560 ((volatile jint*)p)[0] = acc.words[0]; | |
561 ((volatile jint*)p)[1] = acc.words[1]; | |
562 } | |
563 t->set_doing_unsafe_access(false); | |
564 UNSAFE_END | |
565 | |
566 | |
567 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
568 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
569 void* p = addr_from_java(addr); | |
570 return addr_to_java(*(void**)p); | |
571 UNSAFE_END | |
572 | |
573 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
574 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
575 void* p = addr_from_java(addr); | |
576 *(void**)p = addr_from_java(x); | |
577 UNSAFE_END | |
578 | |
579 | |
580 ////// Allocation requests | |
581 | |
582 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
583 UnsafeWrapper("Unsafe_AllocateInstance"); | |
584 { | |
585 ThreadToNativeFromVM ttnfv(thread); | |
586 return env->AllocObject(cls); | |
587 } | |
588 UNSAFE_END | |
589 | |
590 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
591 UnsafeWrapper("Unsafe_AllocateMemory"); | |
592 size_t sz = (size_t)size; | |
593 if (sz != (julong)size || size < 0) { | |
594 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
595 } | |
596 if (sz == 0) { | |
597 return 0; | |
598 } | |
599 sz = round_to(sz, HeapWordSize); | |
6197 | 600 void* x = os::malloc(sz, mtInternal); |
0 | 601 if (x == NULL) { |
602 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
603 } | |
604 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
605 return addr_to_java(x); | |
606 UNSAFE_END | |
607 | |
608 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
609 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
610 void* p = addr_from_java(addr); | |
611 size_t sz = (size_t)size; | |
612 if (sz != (julong)size || size < 0) { | |
613 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
614 } | |
615 if (sz == 0) { | |
616 os::free(p); | |
617 return 0; | |
618 } | |
619 sz = round_to(sz, HeapWordSize); | |
6197 | 620 void* x = (p == NULL) ? os::malloc(sz, mtInternal) : os::realloc(p, sz, mtInternal); |
0 | 621 if (x == NULL) { |
622 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
623 } | |
624 return addr_to_java(x); | |
625 UNSAFE_END | |
626 | |
627 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
628 UnsafeWrapper("Unsafe_FreeMemory"); | |
629 void* p = addr_from_java(addr); | |
630 if (p == NULL) { | |
631 return; | |
632 } | |
633 os::free(p); | |
634 UNSAFE_END | |
635 | |
636 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
637 UnsafeWrapper("Unsafe_SetMemory"); | |
638 size_t sz = (size_t)size; | |
639 if (sz != (julong)size || size < 0) { | |
640 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
641 } | |
642 char* p = (char*) addr_from_java(addr); | |
643 Copy::fill_to_memory_atomic(p, sz, value); | |
644 UNSAFE_END | |
645 | |
646 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
647 UnsafeWrapper("Unsafe_SetMemory"); | |
648 size_t sz = (size_t)size; | |
649 if (sz != (julong)size || size < 0) { | |
650 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
651 } | |
652 oop base = JNIHandles::resolve(obj); | |
653 void* p = index_oop_from_field_offset_long(base, offset); | |
654 Copy::fill_to_memory_atomic(p, sz, value); | |
655 UNSAFE_END | |
656 | |
657 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
658 UnsafeWrapper("Unsafe_CopyMemory"); | |
659 if (size == 0) { | |
660 return; | |
661 } | |
662 size_t sz = (size_t)size; | |
663 if (sz != (julong)size || size < 0) { | |
664 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
665 } | |
666 void* src = addr_from_java(srcAddr); | |
667 void* dst = addr_from_java(dstAddr); | |
668 Copy::conjoint_memory_atomic(src, dst, sz); | |
669 UNSAFE_END | |
670 | |
671 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
672 UnsafeWrapper("Unsafe_CopyMemory"); | |
673 if (size == 0) { | |
674 return; | |
675 } | |
676 size_t sz = (size_t)size; | |
677 if (sz != (julong)size || size < 0) { | |
678 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
679 } | |
680 oop srcp = JNIHandles::resolve(srcObj); | |
681 oop dstp = JNIHandles::resolve(dstObj); | |
682 if (dstp != NULL && !dstp->is_typeArray()) { | |
683 // NYI: This works only for non-oop arrays at present. | |
684 // Generalizing it would be reasonable, but requires card marking. | |
685 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
686 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
687 } | |
688 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
689 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
690 Copy::conjoint_memory_atomic(src, dst, sz); | |
691 UNSAFE_END | |
692 | |
693 | |
694 ////// Random queries | |
695 | |
696 // See comment at file start about UNSAFE_LEAF | |
697 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
698 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
699 UnsafeWrapper("Unsafe_AddressSize"); | |
700 return sizeof(void*); | |
701 UNSAFE_END | |
702 | |
703 // See comment at file start about UNSAFE_LEAF | |
704 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
705 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
706 UnsafeWrapper("Unsafe_PageSize"); | |
707 return os::vm_page_size(); | |
708 UNSAFE_END | |
709 | |
710 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
711 if (field == NULL) { | |
712 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
713 } | |
714 | |
715 oop reflected = JNIHandles::resolve_non_null(field); | |
716 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
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717 Klass* k = java_lang_Class::as_Klass(mirror); |
0 | 718 int slot = java_lang_reflect_Field::slot(reflected); |
719 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
720 | |
721 if (must_be_static >= 0) { | |
722 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
723 if (must_be_static != really_is_static) { | |
724 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
725 } | |
726 } | |
727 | |
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728 int offset = InstanceKlass::cast(k)->field_offset(slot); |
0 | 729 return field_offset_from_byte_offset(offset); |
730 } | |
731 | |
732 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
733 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
734 return find_field_offset(field, 0, THREAD); | |
735 UNSAFE_END | |
736 | |
737 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
738 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
739 return find_field_offset(field, 1, THREAD); | |
740 UNSAFE_END | |
741 | |
742 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
743 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
744 // Note: In this VM implementation, a field address is always a short | |
745 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
746 // range of the return type is never used. However, some implementations | |
747 // might put the static field inside an array shared by many classes, | |
748 // or even at a fixed address, in which case the address could be quite | |
749 // large. In that last case, this function would return NULL, since | |
750 // the address would operate alone, without any base pointer. | |
751 | |
752 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
753 | |
754 oop reflected = JNIHandles::resolve_non_null(field); | |
755 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
756 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
757 | |
758 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
759 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
760 } | |
761 | |
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762 return JNIHandles::make_local(env, mirror); |
0 | 763 UNSAFE_END |
764 | |
765 //@deprecated | |
766 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
767 UnsafeWrapper("Unsafe_FieldOffset"); | |
768 // tries (but fails) to be polymorphic between static and non-static: | |
769 jlong offset = find_field_offset(field, -1, THREAD); | |
770 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
771 return (jint)offset; | |
772 UNSAFE_END | |
773 | |
774 //@deprecated | |
775 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
776 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
777 if (clazz == NULL) { | |
778 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
779 } | |
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780 return JNIHandles::make_local(env, JNIHandles::resolve_non_null(clazz)); |
0 | 781 UNSAFE_END |
782 | |
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783 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
0 | 784 UnsafeWrapper("Unsafe_EnsureClassInitialized"); |
785 if (clazz == NULL) { | |
786 THROW(vmSymbols::java_lang_NullPointerException()); | |
787 } | |
788 oop mirror = JNIHandles::resolve_non_null(clazz); | |
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789 |
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790 Klass* klass = java_lang_Class::as_Klass(mirror); |
6983 | 791 if (klass != NULL && klass->should_be_initialized()) { |
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792 InstanceKlass* k = InstanceKlass::cast(klass); |
0 | 793 k->initialize(CHECK); |
794 } | |
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795 } |
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796 UNSAFE_END |
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797 |
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798 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
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799 UnsafeWrapper("Unsafe_ShouldBeInitialized"); |
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800 if (clazz == NULL) { |
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801 THROW_(vmSymbols::java_lang_NullPointerException(), false); |
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802 } |
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803 oop mirror = JNIHandles::resolve_non_null(clazz); |
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804 Klass* klass = java_lang_Class::as_Klass(mirror); |
6983 | 805 if (klass != NULL && klass->should_be_initialized()) { |
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806 return true; |
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807 } |
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808 return false; |
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809 } |
0 | 810 UNSAFE_END |
811 | |
812 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
813 if (acls == NULL) { | |
814 THROW(vmSymbols::java_lang_NullPointerException()); | |
815 } | |
816 oop mirror = JNIHandles::resolve_non_null(acls); | |
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817 Klass* k = java_lang_Class::as_Klass(mirror); |
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818 if (k == NULL || !k->oop_is_array()) { |
0 | 819 THROW(vmSymbols::java_lang_InvalidClassException()); |
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820 } else if (k->oop_is_objArray()) { |
0 | 821 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); |
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822 scale = heapOopSize; |
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823 } else if (k->oop_is_typeArray()) { |
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824 TypeArrayKlass* tak = TypeArrayKlass::cast(k); |
0 | 825 base = tak->array_header_in_bytes(); |
826 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
827 scale = (1 << tak->log2_element_size()); | |
828 } else { | |
829 ShouldNotReachHere(); | |
830 } | |
831 } | |
832 | |
833 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
834 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
835 int base, scale; | |
836 getBaseAndScale(base, scale, acls, CHECK_0); | |
837 return field_offset_from_byte_offset(base); | |
838 UNSAFE_END | |
839 | |
840 | |
841 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
842 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
843 int base, scale; | |
844 getBaseAndScale(base, scale, acls, CHECK_0); | |
845 // This VM packs both fields and array elements down to the byte. | |
846 // But watch out: If this changes, so that array references for | |
847 // a given primitive type (say, T_BOOLEAN) use different memory units | |
848 // than fields, this method MUST return zero for such arrays. | |
849 // For example, the VM used to store sub-word sized fields in full | |
850 // words in the object layout, so that accessors like getByte(Object,int) | |
851 // did not really do what one might expect for arrays. Therefore, | |
852 // this function used to report a zero scale factor, so that the user | |
853 // would know not to attempt to access sub-word array elements. | |
854 // // Code for unpacked fields: | |
855 // if (scale < wordSize) return 0; | |
856 | |
857 // The following allows for a pretty general fieldOffset cookie scheme, | |
858 // but requires it to be linear in byte offset. | |
859 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
860 UNSAFE_END | |
861 | |
862 | |
863 static inline void throw_new(JNIEnv *env, const char *ename) { | |
864 char buf[100]; | |
865 strcpy(buf, "java/lang/"); | |
866 strcat(buf, ename); | |
867 jclass cls = env->FindClass(buf); | |
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868 if (env->ExceptionCheck()) { |
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869 env->ExceptionClear(); |
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870 tty->print_cr("Unsafe: cannot throw %s because FindClass has failed", buf); |
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871 return; |
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872 } |
0 | 873 char* msg = NULL; |
874 env->ThrowNew(cls, msg); | |
875 } | |
876 | |
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877 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { |
0 | 878 { |
879 // Code lifted from JDK 1.3 ClassLoader.c | |
880 | |
881 jbyte *body; | |
882 char *utfName; | |
883 jclass result = 0; | |
884 char buf[128]; | |
885 | |
886 if (UsePerfData) { | |
887 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
888 } | |
889 | |
890 if (data == NULL) { | |
891 throw_new(env, "NullPointerException"); | |
892 return 0; | |
893 } | |
894 | |
895 /* Work around 4153825. malloc crashes on Solaris when passed a | |
896 * negative size. | |
897 */ | |
898 if (length < 0) { | |
899 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
900 return 0; | |
901 } | |
902 | |
6197 | 903 body = NEW_C_HEAP_ARRAY(jbyte, length, mtInternal); |
0 | 904 |
905 if (body == 0) { | |
906 throw_new(env, "OutOfMemoryError"); | |
907 return 0; | |
908 } | |
909 | |
910 env->GetByteArrayRegion(data, offset, length, body); | |
911 | |
912 if (env->ExceptionOccurred()) | |
913 goto free_body; | |
914 | |
915 if (name != NULL) { | |
916 uint len = env->GetStringUTFLength(name); | |
917 int unicode_len = env->GetStringLength(name); | |
918 if (len >= sizeof(buf)) { | |
6197 | 919 utfName = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); |
0 | 920 if (utfName == NULL) { |
921 throw_new(env, "OutOfMemoryError"); | |
922 goto free_body; | |
923 } | |
924 } else { | |
925 utfName = buf; | |
926 } | |
927 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
928 //VerifyFixClassname(utfName); | |
929 for (uint i = 0; i < len; i++) { | |
930 if (utfName[i] == '.') utfName[i] = '/'; | |
931 } | |
932 } else { | |
933 utfName = NULL; | |
934 } | |
935 | |
936 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
937 | |
938 if (utfName && utfName != buf) | |
6197 | 939 FREE_C_HEAP_ARRAY(char, utfName, mtInternal); |
0 | 940 |
941 free_body: | |
6197 | 942 FREE_C_HEAP_ARRAY(jbyte, body, mtInternal); |
0 | 943 return result; |
944 } | |
945 } | |
946 | |
947 | |
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948 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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949 UnsafeWrapper("Unsafe_DefineClass"); |
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950 { |
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951 ThreadToNativeFromVM ttnfv(thread); |
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952 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
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953 } |
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954 UNSAFE_END |
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955 |
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956 static jobject get_class_loader(JNIEnv* env, jclass cls) { |
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957 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { |
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958 return NULL; |
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959 } |
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960 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
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961 oop loader = k->class_loader(); |
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962 return JNIHandles::make_local(env, loader); |
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963 } |
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964 |
0 | 965 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) |
966 UnsafeWrapper("Unsafe_DefineClass"); | |
967 { | |
968 ThreadToNativeFromVM ttnfv(thread); | |
969 | |
970 int depthFromDefineClass0 = 1; | |
971 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
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972 jobject loader = (caller == NULL) ? NULL : get_class_loader(env, caller); |
0 | 973 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); |
974 | |
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975 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
0 | 976 } |
977 UNSAFE_END | |
978 | |
979 | |
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980 #define DAC_Args CLS"[B["OBJ |
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981 // define a class but do not make it known to the class loader or system dictionary |
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982 // - host_class: supplies context for linkage, access control, protection domain, and class loader |
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983 // - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
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984 // - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
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985 |
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986 // When you load an anonymous class U, it works as if you changed its name just before loading, |
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987 // to a name that you will never use again. Since the name is lost, no other class can directly |
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988 // link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
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989 // through java.lang.Class methods like Class.newInstance. |
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990 |
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991 // Access checks for linkage sites within U continue to follow the same rules as for named classes. |
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992 // The package of an anonymous class is given by the package qualifier on the name under which it was loaded. |
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993 // An anonymous class also has special privileges to access any member of its host class. |
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994 // This is the main reason why this loading operation is unsafe. The purpose of this is to |
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995 // allow language implementations to simulate "open classes"; a host class in effect gets |
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996 // new code when an anonymous class is loaded alongside it. A less convenient but more |
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997 // standard way to do this is with reflection, which can also be set to ignore access |
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998 // restrictions. |
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999 |
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1000 // Access into an anonymous class is possible only through reflection. Therefore, there |
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1001 // are no special access rules for calling into an anonymous class. The relaxed access |
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1002 // rule for the host class is applied in the opposite direction: A host class reflectively |
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1003 // access one of its anonymous classes. |
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1004 |
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1005 // If you load the same bytecodes twice, you get two different classes. You can reload |
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1006 // the same bytecodes with or without varying CP patches. |
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1007 |
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1008 // By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
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1009 // The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
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1010 // The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
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1011 |
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1012 // This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
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1013 // an outer class (so that U2 is an anonymous inner class of anonymous U1). |
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1014 // It is not possible for a named class, or an older anonymous class, to refer by |
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1015 // name (via its CP) to a newer anonymous class. |
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1016 |
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1017 // CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
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1018 // or type descriptors used in the loaded anonymous class. |
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1019 |
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1020 // Finally, CP patching may be used to introduce "live" objects into the constant pool, |
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1021 // instead of "dead" strings. A compiled statement like println((Object)"hello") can |
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1022 // be changed to println(greeting), where greeting is an arbitrary object created before |
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1023 // the anonymous class is loaded. This is useful in dynamic languages, in which |
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1024 // various kinds of metaobjects must be introduced as constants into bytecode. |
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1025 // Note the cast (Object), which tells the verifier to expect an arbitrary object, |
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1026 // not just a literal string. For such ldc instructions, the verifier uses the |
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1027 // type Object instead of String, if the loaded constant is not in fact a String. |
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1028 |
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1029 static instanceKlassHandle |
431
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1030 Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
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1031 jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
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1032 HeapWord* *temp_alloc, |
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1033 TRAPS) { |
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1034 |
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1035 if (UsePerfData) { |
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1036 ClassLoader::unsafe_defineClassCallCounter()->inc(); |
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1037 } |
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1038 |
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1039 if (data == NULL) { |
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1040 THROW_0(vmSymbols::java_lang_NullPointerException()); |
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1041 } |
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1042 |
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1043 jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
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1044 jint word_length = (length + sizeof(HeapWord)-1) / sizeof(HeapWord); |
6197 | 1045 HeapWord* body = NEW_C_HEAP_ARRAY(HeapWord, word_length, mtInternal); |
431
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1046 if (body == NULL) { |
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1047 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
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1048 } |
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1049 |
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1050 // caller responsible to free it: |
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1051 (*temp_alloc) = body; |
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1052 |
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1053 { |
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1054 jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
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1055 Copy::conjoint_words((HeapWord*) array_base, body, word_length); |
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1056 } |
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1057 |
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1058 u1* class_bytes = (u1*) body; |
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1059 int class_bytes_length = (int) length; |
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1060 if (class_bytes_length < 0) class_bytes_length = 0; |
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1061 if (class_bytes == NULL |
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1062 || host_class == NULL |
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1063 || length != class_bytes_length) |
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1064 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1065 |
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1066 objArrayHandle cp_patches_h; |
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1067 if (cp_patches_jh != NULL) { |
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1068 oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
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1069 if (!p->is_objArray()) |
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1070 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1071 cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
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1072 } |
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1073 |
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1074 KlassHandle host_klass(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(host_class))); |
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1075 const char* host_source = host_klass->external_name(); |
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1076 Handle host_loader(THREAD, host_klass->class_loader()); |
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1077 Handle host_domain(THREAD, host_klass->protection_domain()); |
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1078 |
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1079 GrowableArray<Handle>* cp_patches = NULL; |
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1080 if (cp_patches_h.not_null()) { |
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1081 int alen = cp_patches_h->length(); |
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1082 for (int i = alen-1; i >= 0; i--) { |
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1083 oop p = cp_patches_h->obj_at(i); |
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1084 if (p != NULL) { |
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1085 Handle patch(THREAD, p); |
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1086 if (cp_patches == NULL) |
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1087 cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
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1088 cp_patches->at_put(i, patch); |
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1089 } |
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1090 } |
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1091 } |
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1092 |
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1093 ClassFileStream st(class_bytes, class_bytes_length, (char*) host_source); |
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1094 |
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1095 instanceKlassHandle anon_klass; |
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1096 { |
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1097 Symbol* no_class_name = NULL; |
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1098 Klass* anonk = SystemDictionary::parse_stream(no_class_name, |
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1099 host_loader, host_domain, |
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1100 &st, host_klass, cp_patches, |
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1101 CHECK_NULL); |
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1102 if (anonk == NULL) return NULL; |
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1103 anon_klass = instanceKlassHandle(THREAD, anonk); |
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1104 } |
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1105 |
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1106 return anon_klass; |
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1107 } |
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1108 |
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1109 UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) |
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1110 { |
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1111 instanceKlassHandle anon_klass; |
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1112 jobject res_jh = NULL; |
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1113 |
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1114 UnsafeWrapper("Unsafe_DefineAnonymousClass"); |
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1115 ResourceMark rm(THREAD); |
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1116 |
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1117 HeapWord* temp_alloc = NULL; |
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1118 |
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1119 anon_klass = Unsafe_DefineAnonymousClass_impl(env, host_class, data, |
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1120 cp_patches_jh, |
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1121 &temp_alloc, THREAD); |
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1122 if (anon_klass() != NULL) |
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1123 res_jh = JNIHandles::make_local(env, anon_klass->java_mirror()); |
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1124 |
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1125 // try/finally clause: |
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1126 if (temp_alloc != NULL) { |
6197 | 1127 FREE_C_HEAP_ARRAY(HeapWord, temp_alloc, mtInternal); |
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1128 } |
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1129 |
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1130 // The anonymous class loader data has been artificially been kept alive to |
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1131 // this point. The mirror and any instances of this class have to keep |
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1132 // it alive afterwards. |
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1133 if (anon_klass() != NULL) { |
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1134 anon_klass->class_loader_data()->set_keep_alive(false); |
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1135 } |
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1136 |
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1137 // let caller initialize it as needed... |
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1138 |
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1139 return (jclass) res_jh; |
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1140 } |
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1141 UNSAFE_END |
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1142 |
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1143 |
0 | 1144 |
1145 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1146 UnsafeWrapper("Unsafe_MonitorEnter"); | |
1147 { | |
1148 if (jobj == NULL) { | |
1149 THROW(vmSymbols::java_lang_NullPointerException()); | |
1150 } | |
1151 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1152 ObjectSynchronizer::jni_enter(obj, CHECK); | |
1153 } | |
1154 UNSAFE_END | |
1155 | |
1156 | |
1157 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1158 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
1159 { | |
1160 if (jobj == NULL) { | |
1161 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
1162 } | |
1163 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1164 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
1165 return (res ? JNI_TRUE : JNI_FALSE); | |
1166 } | |
1167 UNSAFE_END | |
1168 | |
1169 | |
1170 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1171 UnsafeWrapper("Unsafe_MonitorExit"); | |
1172 { | |
1173 if (jobj == NULL) { | |
1174 THROW(vmSymbols::java_lang_NullPointerException()); | |
1175 } | |
1176 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
1177 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
1178 } | |
1179 UNSAFE_END | |
1180 | |
1181 | |
1182 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
1183 UnsafeWrapper("Unsafe_ThrowException"); | |
1184 { | |
1185 ThreadToNativeFromVM ttnfv(thread); | |
1186 env->Throw(thr); | |
1187 } | |
1188 UNSAFE_END | |
1189 | |
1190 // JSR166 ------------------------------------------------------------------ | |
1191 | |
1192 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
1193 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
1194 oop x = JNIHandles::resolve(x_h); | |
1195 oop e = JNIHandles::resolve(e_h); | |
1196 oop p = JNIHandles::resolve(obj); | |
113
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1197 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
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1198 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e, true); |
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1199 jboolean success = (res == e); |
0 | 1200 if (success) |
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1201 update_barrier_set((void*)addr, x); |
0 | 1202 return success; |
1203 UNSAFE_END | |
1204 | |
1205 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
1206 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
1207 oop p = JNIHandles::resolve(obj); | |
1208 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
1209 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
1210 UNSAFE_END | |
1211 | |
1212 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
1213 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
1214 Handle p (THREAD, JNIHandles::resolve(obj)); | |
1215 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
1216 if (VM_Version::supports_cx8()) | |
1217 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
1218 else { | |
1219 jboolean success = false; | |
1220 ObjectLocker ol(p, THREAD); | |
1221 if (*addr == e) { *addr = x; success = true; } | |
1222 return success; | |
1223 } | |
1224 UNSAFE_END | |
1225 | |
1226 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
1227 UnsafeWrapper("Unsafe_Park"); | |
10405 | 1228 EventThreadPark event; |
4006 | 1229 #ifndef USDT2 |
1324
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1230 HS_DTRACE_PROBE3(hotspot, thread__park__begin, thread->parker(), (int) isAbsolute, time); |
4006 | 1231 #else /* USDT2 */ |
1232 HOTSPOT_THREAD_PARK_BEGIN( | |
1233 (uintptr_t) thread->parker(), (int) isAbsolute, time); | |
1234 #endif /* USDT2 */ | |
0 | 1235 JavaThreadParkedState jtps(thread, time != 0); |
1236 thread->parker()->park(isAbsolute != 0, time); | |
4006 | 1237 #ifndef USDT2 |
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1238 HS_DTRACE_PROBE1(hotspot, thread__park__end, thread->parker()); |
4006 | 1239 #else /* USDT2 */ |
1240 HOTSPOT_THREAD_PARK_END( | |
1241 (uintptr_t) thread->parker()); | |
1242 #endif /* USDT2 */ | |
10405 | 1243 if (event.should_commit()) { |
1244 oop obj = thread->current_park_blocker(); | |
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1245 event.set_klass((obj != NULL) ? obj->klass() : NULL); |
10405 | 1246 event.set_timeout(time); |
12316
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1247 event.set_address((obj != NULL) ? (TYPE_ADDRESS) cast_from_oop<uintptr_t>(obj) : 0); |
10405 | 1248 event.commit(); |
1249 } | |
0 | 1250 UNSAFE_END |
1251 | |
1252 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
1253 UnsafeWrapper("Unsafe_Unpark"); | |
1254 Parker* p = NULL; | |
1255 if (jthread != NULL) { | |
1256 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
1257 if (java_thread != NULL) { | |
1258 jlong lp = java_lang_Thread::park_event(java_thread); | |
1259 if (lp != 0) { | |
1260 // This cast is OK even though the jlong might have been read | |
1261 // non-atomically on 32bit systems, since there, one word will | |
1262 // always be zero anyway and the value set is always the same | |
1263 p = (Parker*)addr_from_java(lp); | |
1264 } else { | |
1265 // Grab lock if apparently null or using older version of library | |
1266 MutexLocker mu(Threads_lock); | |
1267 java_thread = JNIHandles::resolve_non_null(jthread); | |
1268 if (java_thread != NULL) { | |
1269 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
1270 if (thr != NULL) { | |
1271 p = thr->parker(); | |
1272 if (p != NULL) { // Bind to Java thread for next time. | |
1273 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
1274 } | |
1275 } | |
1276 } | |
1277 } | |
1278 } | |
1279 } | |
1280 if (p != NULL) { | |
4006 | 1281 #ifndef USDT2 |
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1282 HS_DTRACE_PROBE1(hotspot, thread__unpark, p); |
4006 | 1283 #else /* USDT2 */ |
1284 HOTSPOT_THREAD_UNPARK( | |
1285 (uintptr_t) p); | |
1286 #endif /* USDT2 */ | |
0 | 1287 p->unpark(); |
1288 } | |
1289 UNSAFE_END | |
1290 | |
1291 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
1292 UnsafeWrapper("Unsafe_Loadavg"); | |
1293 const int max_nelem = 3; | |
1294 double la[max_nelem]; | |
1295 jint ret; | |
1296 | |
1297 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
1298 assert(a->is_typeArray(), "must be type array"); | |
1299 | |
1300 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
1301 ThreadToNativeFromVM ttnfv(thread); | |
1302 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
1303 return -1; | |
1304 } | |
1305 | |
1306 ret = os::loadavg(la, nelem); | |
1307 if (ret == -1) return -1; | |
1308 | |
1309 // if successful, ret is the number of samples actually retrieved. | |
1310 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
1311 switch(ret) { | |
1312 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
1313 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
1314 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
1315 } | |
1316 return ret; | |
1317 UNSAFE_END | |
1318 | |
1319 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1320 UnsafeWrapper("Unsafe_PrefetchRead"); | |
1321 oop p = JNIHandles::resolve(obj); | |
1322 void* addr = index_oop_from_field_offset_long(p, 0); | |
1323 Prefetch::read(addr, (intx)offset); | |
1324 UNSAFE_END | |
1325 | |
1326 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1327 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
1328 oop p = JNIHandles::resolve(obj); | |
1329 void* addr = index_oop_from_field_offset_long(p, 0); | |
1330 Prefetch::write(addr, (intx)offset); | |
1331 UNSAFE_END | |
1332 | |
1333 | |
1334 /// JVM_RegisterUnsafeMethods | |
1335 | |
1336 #define ADR "J" | |
1337 | |
1338 #define LANG "Ljava/lang/" | |
1339 | |
1340 #define OBJ LANG"Object;" | |
1341 #define CLS LANG"Class;" | |
1342 #define CTR LANG"reflect/Constructor;" | |
1343 #define FLD LANG"reflect/Field;" | |
1344 #define MTH LANG"reflect/Method;" | |
1345 #define THR LANG"Throwable;" | |
1346 | |
1347 #define DC0_Args LANG"String;[BII" | |
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1348 #define DC_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" |
0 | 1349 |
1350 #define CC (char*) /*cast a literal from (const char*)*/ | |
1351 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
1352 | |
1353 // define deprecated accessors for compabitility with 1.4.0 | |
1354 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
1355 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
1356 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
1357 | |
1358 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
1359 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
1360 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1361 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
1362 | |
1363 // Note: In 1.5.0, there are volatile versions too | |
1364 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
1365 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1366 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
1367 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
1368 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
1369 | |
1370 | |
1371 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
1372 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
1373 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
1374 | |
1375 | |
1376 | |
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1377 // These are the methods for 1.4.0 |
0 | 1378 static JNINativeMethod methods_140[] = { |
1379 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
1380 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
1381 | |
1382 DECLARE_GETSETOOP_140(Boolean, Z), | |
1383 DECLARE_GETSETOOP_140(Byte, B), | |
1384 DECLARE_GETSETOOP_140(Short, S), | |
1385 DECLARE_GETSETOOP_140(Char, C), | |
1386 DECLARE_GETSETOOP_140(Int, I), | |
1387 DECLARE_GETSETOOP_140(Long, J), | |
1388 DECLARE_GETSETOOP_140(Float, F), | |
1389 DECLARE_GETSETOOP_140(Double, D), | |
1390 | |
1391 DECLARE_GETSETNATIVE(Byte, B), | |
1392 DECLARE_GETSETNATIVE(Short, S), | |
1393 DECLARE_GETSETNATIVE(Char, C), | |
1394 DECLARE_GETSETNATIVE(Int, I), | |
1395 DECLARE_GETSETNATIVE(Long, J), | |
1396 DECLARE_GETSETNATIVE(Float, F), | |
1397 DECLARE_GETSETNATIVE(Double, D), | |
1398 | |
1399 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1400 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1401 | |
1402 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1403 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1404 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1405 | |
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1406 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, |
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1407 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, |
0 | 1408 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
1409 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1410 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1411 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1412 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1413 | |
1414 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1415 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1416 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1417 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1418 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1419 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1420 }; | |
1421 | |
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1422 // These are the methods prior to the JSR 166 changes in 1.5.0 |
0 | 1423 static JNINativeMethod methods_141[] = { |
1424 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1425 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1426 | |
1427 DECLARE_GETSETOOP_141(Boolean, Z), | |
1428 DECLARE_GETSETOOP_141(Byte, B), | |
1429 DECLARE_GETSETOOP_141(Short, S), | |
1430 DECLARE_GETSETOOP_141(Char, C), | |
1431 DECLARE_GETSETOOP_141(Int, I), | |
1432 DECLARE_GETSETOOP_141(Long, J), | |
1433 DECLARE_GETSETOOP_141(Float, F), | |
1434 DECLARE_GETSETOOP_141(Double, D), | |
1435 | |
1436 DECLARE_GETSETNATIVE(Byte, B), | |
1437 DECLARE_GETSETNATIVE(Short, S), | |
1438 DECLARE_GETSETNATIVE(Char, C), | |
1439 DECLARE_GETSETNATIVE(Int, I), | |
1440 DECLARE_GETSETNATIVE(Long, J), | |
1441 DECLARE_GETSETNATIVE(Float, F), | |
1442 DECLARE_GETSETNATIVE(Double, D), | |
1443 | |
1444 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1445 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1446 | |
1447 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1448 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1449 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1450 | |
1451 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1452 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1453 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1454 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1455 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1456 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1457 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1458 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1459 | |
1460 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1461 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1462 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1463 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1464 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1465 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1466 | |
1467 }; | |
1468 | |
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1469 // These are the methods prior to the JSR 166 changes in 1.6.0 |
0 | 1470 static JNINativeMethod methods_15[] = { |
1471 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1472 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1473 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1474 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1475 | |
1476 | |
1477 DECLARE_GETSETOOP(Boolean, Z), | |
1478 DECLARE_GETSETOOP(Byte, B), | |
1479 DECLARE_GETSETOOP(Short, S), | |
1480 DECLARE_GETSETOOP(Char, C), | |
1481 DECLARE_GETSETOOP(Int, I), | |
1482 DECLARE_GETSETOOP(Long, J), | |
1483 DECLARE_GETSETOOP(Float, F), | |
1484 DECLARE_GETSETOOP(Double, D), | |
1485 | |
1486 DECLARE_GETSETNATIVE(Byte, B), | |
1487 DECLARE_GETSETNATIVE(Short, S), | |
1488 DECLARE_GETSETNATIVE(Char, C), | |
1489 DECLARE_GETSETNATIVE(Int, I), | |
1490 DECLARE_GETSETNATIVE(Long, J), | |
1491 DECLARE_GETSETNATIVE(Float, F), | |
1492 DECLARE_GETSETNATIVE(Double, D), | |
1493 | |
1494 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1495 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1496 | |
1497 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1498 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1499 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1500 | |
1501 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1502 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1503 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1504 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1505 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1506 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1507 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1508 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1509 | |
1510 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1511 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1512 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1513 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1514 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1515 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1516 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1517 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1518 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1519 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1520 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1521 | |
1522 }; | |
1523 | |
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1524 // These are the methods for 1.6.0 and 1.7.0 |
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1525 static JNINativeMethod methods_16[] = { |
0 | 1526 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
1527 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1528 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1529 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1530 | |
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1531 DECLARE_GETSETOOP(Boolean, Z), |
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1532 DECLARE_GETSETOOP(Byte, B), |
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1533 DECLARE_GETSETOOP(Short, S), |
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1534 DECLARE_GETSETOOP(Char, C), |
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1535 DECLARE_GETSETOOP(Int, I), |
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1536 DECLARE_GETSETOOP(Long, J), |
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1537 DECLARE_GETSETOOP(Float, F), |
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1538 DECLARE_GETSETOOP(Double, D), |
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1539 |
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1540 DECLARE_GETSETNATIVE(Byte, B), |
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1541 DECLARE_GETSETNATIVE(Short, S), |
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1542 DECLARE_GETSETNATIVE(Char, C), |
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1543 DECLARE_GETSETNATIVE(Int, I), |
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1544 DECLARE_GETSETNATIVE(Long, J), |
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1545 DECLARE_GETSETNATIVE(Float, F), |
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1546 DECLARE_GETSETNATIVE(Double, D), |
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1547 |
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1548 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, |
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1549 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, |
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1550 |
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1551 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, |
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1552 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, |
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1553 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, |
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1554 |
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1555 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, |
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1556 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, |
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1557 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, |
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1558 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
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1559 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, |
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1560 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, |
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1561 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, |
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1562 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, |
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1563 |
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1564 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, |
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1565 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
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1566 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
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1567 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, |
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1568 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, |
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1569 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, |
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1570 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, |
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1571 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, |
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1572 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, |
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1573 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, |
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1574 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, |
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1575 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, |
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1576 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, |
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1577 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, |
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1578 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} |
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1579 }; |
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1580 |
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1581 // These are the methods for 1.8.0 |
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1582 static JNINativeMethod methods_18[] = { |
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1583 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
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1584 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, |
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1585 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, |
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1586 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, |
0 | 1587 |
1588 DECLARE_GETSETOOP(Boolean, Z), | |
1589 DECLARE_GETSETOOP(Byte, B), | |
1590 DECLARE_GETSETOOP(Short, S), | |
1591 DECLARE_GETSETOOP(Char, C), | |
1592 DECLARE_GETSETOOP(Int, I), | |
1593 DECLARE_GETSETOOP(Long, J), | |
1594 DECLARE_GETSETOOP(Float, F), | |
1595 DECLARE_GETSETOOP(Double, D), | |
1596 | |
1597 DECLARE_GETSETNATIVE(Byte, B), | |
1598 DECLARE_GETSETNATIVE(Short, S), | |
1599 DECLARE_GETSETNATIVE(Char, C), | |
1600 DECLARE_GETSETNATIVE(Int, I), | |
1601 DECLARE_GETSETNATIVE(Long, J), | |
1602 DECLARE_GETSETNATIVE(Float, F), | |
1603 DECLARE_GETSETNATIVE(Double, D), | |
1604 | |
1605 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1606 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1607 | |
1608 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1609 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1610 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1611 | |
1612 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1613 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1614 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1615 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1616 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1617 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1618 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1619 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1620 | |
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1621 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
0 | 1622 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
1623 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1624 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1625 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
1626 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1627 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1628 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1629 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1630 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
1631 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
1632 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
1633 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1634 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1635 }; | |
1636 | |
1637 JNINativeMethod loadavg_method[] = { | |
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1638 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} |
0 | 1639 }; |
1640 | |
1641 JNINativeMethod prefetch_methods[] = { | |
1642 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1643 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
1644 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1645 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1646 }; | |
1647 | |
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1648 JNINativeMethod memcopy_methods_17[] = { |
0 | 1649 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, |
1650 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
1651 }; | |
1652 | |
1653 JNINativeMethod memcopy_methods_15[] = { | |
1654 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1655 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
1656 }; | |
1657 | |
431
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1658 JNINativeMethod anonk_methods[] = { |
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1659 {CC"defineAnonymousClass", CC"("DAC_Args")"CLS, FN_PTR(Unsafe_DefineAnonymousClass)}, |
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1660 }; |
0 | 1661 |
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1662 JNINativeMethod lform_methods[] = { |
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1663 {CC"shouldBeInitialized",CC"("CLS")Z", FN_PTR(Unsafe_ShouldBeInitialized)}, |
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1664 }; |
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1665 |
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1666 JNINativeMethod fence_methods[] = { |
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1667 {CC"loadFence", CC"()V", FN_PTR(Unsafe_LoadFence)}, |
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1668 {CC"storeFence", CC"()V", FN_PTR(Unsafe_StoreFence)}, |
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1669 {CC"fullFence", CC"()V", FN_PTR(Unsafe_FullFence)}, |
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1670 }; |
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1671 |
0 | 1672 #undef CC |
1673 #undef FN_PTR | |
1674 | |
1675 #undef ADR | |
1676 #undef LANG | |
1677 #undef OBJ | |
1678 #undef CLS | |
1679 #undef CTR | |
1680 #undef FLD | |
1681 #undef MTH | |
1682 #undef THR | |
1683 #undef DC0_Args | |
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1684 #undef DC_Args |
0 | 1685 |
1686 #undef DECLARE_GETSETOOP | |
1687 #undef DECLARE_GETSETNATIVE | |
1688 | |
1689 | |
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1690 /** |
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1691 * Helper method to register native methods. |
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1692 */ |
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1693 static bool register_natives(const char* message, JNIEnv* env, jclass clazz, const JNINativeMethod* methods, jint nMethods) { |
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1694 int status = env->RegisterNatives(clazz, methods, nMethods); |
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1695 if (status < 0 || env->ExceptionOccurred()) { |
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1696 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1697 tty->print_cr("Unsafe: failed registering %s", message); |
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1698 } |
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1699 env->ExceptionClear(); |
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1700 return false; |
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1701 } else { |
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1702 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1703 tty->print_cr("Unsafe: successfully registered %s", message); |
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1704 } |
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1705 return true; |
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1706 } |
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1707 } |
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1708 |
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1709 |
0 | 1710 // This one function is exported, used by NativeLookup. |
1711 // The Unsafe_xxx functions above are called only from the interpreter. | |
1712 // The optimizer looks at names and signatures to recognize | |
1713 // individual functions. | |
1714 | |
1715 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
1716 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
1717 { | |
1718 ThreadToNativeFromVM ttnfv(thread); | |
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1719 |
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1720 // Unsafe methods |
0 | 1721 { |
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1722 bool success = false; |
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1723 // 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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1724 if (!success) { |
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1725 success = register_natives("1.6 methods", env, unsafecls, methods_16, sizeof(methods_16)/sizeof(JNINativeMethod)); |
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1726 } |
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1727 if (!success) { |
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1728 success = register_natives("1.8 methods", env, unsafecls, methods_18, sizeof(methods_18)/sizeof(JNINativeMethod)); |
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1729 } |
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1730 if (!success) { |
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1731 success = register_natives("1.5 methods", env, unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); |
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1732 } |
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1733 if (!success) { |
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1734 success = register_natives("1.4.1 methods", env, unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); |
0 | 1735 } |
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1736 if (!success) { |
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1737 success = register_natives("1.4.0 methods", env, unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); |
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1738 } |
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1739 guarantee(success, "register unsafe natives"); |
0 | 1740 } |
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1741 |
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1742 // Unsafe.getLoadAverage |
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1743 register_natives("1.6 loadavg method", env, unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); |
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1744 |
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1745 // Prefetch methods |
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1746 register_natives("1.6 prefetch methods", env, unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); |
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1747 |
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1748 // Memory copy methods |
0 | 1749 { |
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1750 bool success = false; |
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1751 if (!success) { |
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1752 success = register_natives("1.7 memory copy methods", env, unsafecls, memcopy_methods_17, sizeof(memcopy_methods_17)/sizeof(JNINativeMethod)); |
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1753 } |
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1754 if (!success) { |
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1755 success = register_natives("1.5 memory copy methods", env, unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); |
0 | 1756 } |
1757 } | |
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1758 |
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1759 // Unsafe.defineAnonymousClass |
2416
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1760 if (EnableInvokeDynamic) { |
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1761 register_natives("1.7 define anonymous class method", env, unsafecls, anonk_methods, sizeof(anonk_methods)/sizeof(JNINativeMethod)); |
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1762 } |
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1763 |
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1764 // Unsafe.shouldBeInitialized |
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1765 if (EnableInvokeDynamic) { |
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1766 register_natives("1.7 LambdaForm support", env, unsafecls, lform_methods, sizeof(lform_methods)/sizeof(JNINativeMethod)); |
0 | 1767 } |
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1768 |
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1769 // Fence methods |
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7198429: need checked categorization of caller-sensitive methods in the JDK
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1770 register_natives("1.8 fence methods", env, unsafecls, fence_methods, sizeof(fence_methods)/sizeof(JNINativeMethod)); |
0 | 1771 } |
1772 JVM_END |