Mercurial > hg > graal-jvmci-8
annotate src/share/vm/prims/unsafe.cpp @ 6224:56c4f88474b3
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Reviewed-by: kvn, never
author | twisti |
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date | Mon, 16 Jul 2012 11:14:41 -0700 |
parents | 12d38ffcba2a |
children | 9c9fb30d2b3b |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2011, 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 #ifndef SERIALGC |
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28 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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29 #endif // SERIALGC |
1972 | 30 #include "memory/allocation.inline.hpp" |
31 #include "prims/jni.h" | |
32 #include "prims/jvm.h" | |
33 #include "runtime/globals.hpp" | |
34 #include "runtime/interfaceSupport.hpp" | |
35 #include "runtime/reflection.hpp" | |
36 #include "runtime/synchronizer.hpp" | |
37 #include "services/threadService.hpp" | |
38 #include "utilities/copy.hpp" | |
39 #include "utilities/dtrace.hpp" | |
40 | |
0 | 41 /* |
42 * Implementation of class sun.misc.Unsafe | |
43 */ | |
44 | |
4006 | 45 #ifndef USDT2 |
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46 HS_DTRACE_PROBE_DECL3(hotspot, thread__park__begin, uintptr_t, int, long long); |
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47 HS_DTRACE_PROBE_DECL1(hotspot, thread__park__end, uintptr_t); |
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48 HS_DTRACE_PROBE_DECL1(hotspot, thread__unpark, uintptr_t); |
4006 | 49 #endif /* !USDT2 */ |
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50 |
0 | 51 #define MAX_OBJECT_SIZE \ |
52 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ | |
53 + ((julong)max_jint * sizeof(double)) ) | |
54 | |
55 | |
56 #define UNSAFE_ENTRY(result_type, header) \ | |
57 JVM_ENTRY(result_type, header) | |
58 | |
59 // Can't use UNSAFE_LEAF because it has the signature of a straight | |
60 // call into the runtime (just like JVM_LEAF, funny that) but it's | |
61 // called like a Java Native and thus the wrapper built for it passes | |
62 // arguments like a JNI call. It expects those arguments to be popped | |
63 // from the stack on Intel like all good JNI args are, and adjusts the | |
64 // stack according. Since the JVM_LEAF call expects no extra | |
65 // arguments the stack isn't popped in the C code, is pushed by the | |
66 // wrapper and we get sick. | |
67 //#define UNSAFE_LEAF(result_type, header) \ | |
68 // JVM_LEAF(result_type, header) | |
69 | |
70 #define UNSAFE_END JVM_END | |
71 | |
72 #define UnsafeWrapper(arg) /*nothing, for the present*/ | |
73 | |
74 | |
75 inline void* addr_from_java(jlong addr) { | |
76 // This assert fails in a variety of ways on 32-bit systems. | |
77 // It is impossible to predict whether native code that converts | |
78 // pointers to longs will sign-extend or zero-extend the addresses. | |
79 //assert(addr == (uintptr_t)addr, "must not be odd high bits"); | |
80 return (void*)(uintptr_t)addr; | |
81 } | |
82 | |
83 inline jlong addr_to_java(void* p) { | |
84 assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); | |
85 return (uintptr_t)p; | |
86 } | |
87 | |
88 | |
89 // Note: The VM's obj_field and related accessors use byte-scaled | |
90 // ("unscaled") offsets, just as the unsafe methods do. | |
91 | |
92 // However, the method Unsafe.fieldOffset explicitly declines to | |
93 // guarantee this. The field offset values manipulated by the Java user | |
94 // through the Unsafe API are opaque cookies that just happen to be byte | |
95 // offsets. We represent this state of affairs by passing the cookies | |
96 // through conversion functions when going between the VM and the Unsafe API. | |
97 // The conversion functions just happen to be no-ops at present. | |
98 | |
99 inline jlong field_offset_to_byte_offset(jlong field_offset) { | |
100 return field_offset; | |
101 } | |
102 | |
103 inline jlong field_offset_from_byte_offset(jlong byte_offset) { | |
104 return byte_offset; | |
105 } | |
106 | |
107 inline jint invocation_key_from_method_slot(jint slot) { | |
108 return slot; | |
109 } | |
110 | |
111 inline jint invocation_key_to_method_slot(jint key) { | |
112 return key; | |
113 } | |
114 | |
115 inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { | |
116 jlong byte_offset = field_offset_to_byte_offset(field_offset); | |
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117 // Don't allow unsafe to be used to read or write the header word of oops |
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118 assert(p == NULL || field_offset >= oopDesc::header_size(), "offset must be outside of header"); |
0 | 119 #ifdef ASSERT |
120 if (p != NULL) { | |
121 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
122 if (byte_offset == (jint)byte_offset) { | |
123 void* ptr_plus_disp = (address)p + byte_offset; | |
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124 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
0 | 125 "raw [ptr+disp] must be consistent with oop::field_base"); |
126 } | |
127 } | |
128 #endif | |
129 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
130 return (address)p + (jint) byte_offset; | |
131 else | |
132 return (address)p + byte_offset; | |
133 } | |
134 | |
135 // Externally callable versions: | |
136 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
137 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
138 return field_offset; | |
139 } | |
140 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
141 return byte_offset; | |
142 } | |
143 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
144 return invocation_key_from_method_slot(slot); | |
145 } | |
146 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
147 return invocation_key_to_method_slot(key); | |
148 } | |
149 | |
150 | |
151 ///// Data in the Java heap. | |
152 | |
153 #define GET_FIELD(obj, offset, type_name, v) \ | |
154 oop p = JNIHandles::resolve(obj); \ | |
155 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
156 | |
157 #define SET_FIELD(obj, offset, type_name, x) \ | |
158 oop p = JNIHandles::resolve(obj); \ | |
159 *(type_name*)index_oop_from_field_offset_long(p, offset) = x | |
160 | |
161 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
162 oop p = JNIHandles::resolve(obj); \ | |
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163 volatile type_name v = OrderAccess::load_acquire((volatile type_name*)index_oop_from_field_offset_long(p, offset)); |
0 | 164 |
165 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
166 oop p = JNIHandles::resolve(obj); \ | |
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167 OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), x); |
0 | 168 |
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169 // Macros for oops that check UseCompressedOops |
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170 |
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171 #define GET_OOP_FIELD(obj, offset, v) \ |
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172 oop p = JNIHandles::resolve(obj); \ |
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173 oop v; \ |
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174 if (UseCompressedOops) { \ |
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175 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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176 v = oopDesc::decode_heap_oop(n); \ |
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177 } else { \ |
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178 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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179 } |
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180 |
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181 |
0 | 182 // Get/SetObject must be special-cased, since it works with handles. |
183 | |
184 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
185 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
186 UnsafeWrapper("Unsafe_GetObject"); | |
187 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
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188 GET_OOP_FIELD(obj, offset, v) |
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189 jobject ret = JNIHandles::make_local(env, v); |
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190 #ifndef SERIALGC |
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191 // We could be accessing the referent field in a reference |
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192 // object. If G1 is enabled then we need to register a non-null |
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193 // referent with the SATB barrier. |
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194 if (UseG1GC) { |
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195 bool needs_barrier = false; |
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196 |
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197 if (ret != NULL) { |
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198 if (offset == java_lang_ref_Reference::referent_offset) { |
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199 oop o = JNIHandles::resolve_non_null(obj); |
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200 klassOop k = o->klass(); |
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201 if (instanceKlass::cast(k)->reference_type() != REF_NONE) { |
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202 assert(instanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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203 needs_barrier = true; |
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204 } |
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205 } |
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206 } |
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207 |
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208 if (needs_barrier) { |
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209 oop referent = JNIHandles::resolve(ret); |
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210 G1SATBCardTableModRefBS::enqueue(referent); |
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211 } |
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212 } |
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213 #endif // SERIALGC |
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214 return ret; |
0 | 215 UNSAFE_END |
216 | |
217 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
218 UnsafeWrapper("Unsafe_SetObject"); | |
219 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
220 oop x = JNIHandles::resolve(x_h); | |
221 //SET_FIELD(obj, offset, oop, x); | |
222 oop p = JNIHandles::resolve(obj); | |
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223 if (UseCompressedOops) { |
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224 if (x != NULL) { |
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225 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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226 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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227 } else { |
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228 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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229 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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230 } |
0 | 231 } else { |
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232 if (x != NULL) { |
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233 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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234 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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235 } else { |
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236 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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237 } |
0 | 238 } |
239 UNSAFE_END | |
240 | |
241 // The normal variants allow a null base pointer with an arbitrary address. | |
242 // But if the base pointer is non-null, the offset should make some sense. | |
243 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
244 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
245 UnsafeWrapper("Unsafe_GetObject"); | |
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246 GET_OOP_FIELD(obj, offset, v) |
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247 jobject ret = JNIHandles::make_local(env, v); |
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248 #ifndef SERIALGC |
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249 // We could be accessing the referent field in a reference |
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250 // object. If G1 is enabled then we need to register non-null |
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251 // referent with the SATB barrier. |
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252 if (UseG1GC) { |
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253 bool needs_barrier = false; |
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254 |
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255 if (ret != NULL) { |
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256 if (offset == java_lang_ref_Reference::referent_offset && obj != NULL) { |
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257 oop o = JNIHandles::resolve(obj); |
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258 klassOop k = o->klass(); |
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259 if (instanceKlass::cast(k)->reference_type() != REF_NONE) { |
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260 assert(instanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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261 needs_barrier = true; |
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262 } |
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263 } |
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264 } |
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265 |
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266 if (needs_barrier) { |
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267 oop referent = JNIHandles::resolve(ret); |
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268 G1SATBCardTableModRefBS::enqueue(referent); |
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269 } |
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270 } |
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271 #endif // SERIALGC |
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272 return ret; |
0 | 273 UNSAFE_END |
274 | |
275 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
276 UnsafeWrapper("Unsafe_SetObject"); | |
277 oop x = JNIHandles::resolve(x_h); | |
278 oop p = JNIHandles::resolve(obj); | |
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279 if (UseCompressedOops) { |
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280 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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281 } else { |
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282 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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283 } |
0 | 284 UNSAFE_END |
285 | |
286 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
287 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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288 oop p = JNIHandles::resolve(obj); |
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289 void* addr = index_oop_from_field_offset_long(p, offset); |
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290 volatile oop v; |
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291 if (UseCompressedOops) { |
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292 volatile narrowOop n = *(volatile narrowOop*) addr; |
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293 v = oopDesc::decode_heap_oop(n); |
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294 } else { |
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295 v = *(volatile oop*) addr; |
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296 } |
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297 OrderAccess::acquire(); |
0 | 298 return JNIHandles::make_local(env, v); |
299 UNSAFE_END | |
300 | |
301 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
302 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
303 oop x = JNIHandles::resolve(x_h); | |
304 oop p = JNIHandles::resolve(obj); | |
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305 void* addr = index_oop_from_field_offset_long(p, offset); |
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306 OrderAccess::release(); |
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307 if (UseCompressedOops) { |
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308 oop_store((narrowOop*)addr, x); |
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309 } else { |
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310 oop_store((oop*)addr, x); |
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311 } |
0 | 312 OrderAccess::fence(); |
313 UNSAFE_END | |
314 | |
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315 #if defined(SPARC) || defined(X86) |
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316 // Sparc and X86 have atomic jlong (8 bytes) instructions |
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317 |
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318 #else |
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319 // Keep old code for platforms which may not have atomic jlong (8 bytes) instructions |
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320 |
0 | 321 // Volatile long versions must use locks if !VM_Version::supports_cx8(). |
322 // support_cx8 is a surrogate for 'supports atomic long memory ops'. | |
323 | |
324 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
325 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
326 { | |
327 if (VM_Version::supports_cx8()) { | |
328 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
329 return v; | |
330 } | |
331 else { | |
332 Handle p (THREAD, JNIHandles::resolve(obj)); | |
333 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
334 ObjectLocker ol(p, THREAD); | |
335 jlong value = *addr; | |
336 return value; | |
337 } | |
338 } | |
339 UNSAFE_END | |
340 | |
341 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
342 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
343 { | |
344 if (VM_Version::supports_cx8()) { | |
345 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
346 } | |
347 else { | |
348 Handle p (THREAD, JNIHandles::resolve(obj)); | |
349 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
350 ObjectLocker ol(p, THREAD); | |
351 *addr = x; | |
352 } | |
353 } | |
354 UNSAFE_END | |
355 | |
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356 #endif // not SPARC and not X86 |
0 | 357 |
358 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
359 \ | |
360 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
361 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
362 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
363 GET_FIELD(obj, offset, jboolean, v); \ | |
364 return v; \ | |
365 UNSAFE_END \ | |
366 \ | |
367 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
368 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
369 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
370 SET_FIELD(obj, offset, jboolean, x); \ | |
371 UNSAFE_END \ | |
372 \ | |
373 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
374 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
375 GET_FIELD(obj, offset, jboolean, v); \ | |
376 return v; \ | |
377 UNSAFE_END \ | |
378 \ | |
379 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
380 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
381 SET_FIELD(obj, offset, jboolean, x); \ | |
382 UNSAFE_END \ | |
383 \ | |
384 // END DEFINE_GETSETOOP. | |
385 | |
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386 DEFINE_GETSETOOP(jboolean, Boolean) |
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387 DEFINE_GETSETOOP(jbyte, Byte) |
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388 DEFINE_GETSETOOP(jshort, Short); |
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389 DEFINE_GETSETOOP(jchar, Char); |
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390 DEFINE_GETSETOOP(jint, Int); |
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391 DEFINE_GETSETOOP(jlong, Long); |
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392 DEFINE_GETSETOOP(jfloat, Float); |
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393 DEFINE_GETSETOOP(jdouble, Double); |
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394 |
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395 #undef DEFINE_GETSETOOP |
0 | 396 |
397 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
398 \ | |
399 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
400 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
401 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
402 return v; \ | |
403 UNSAFE_END \ | |
404 \ | |
405 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
406 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
407 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
408 UNSAFE_END \ | |
409 \ | |
410 // END DEFINE_GETSETOOP_VOLATILE. | |
411 | |
412 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
413 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
414 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
415 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
416 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
417 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
418 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
419 | |
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420 #if defined(SPARC) || defined(X86) |
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421 // Sparc and X86 have atomic jlong (8 bytes) instructions |
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422 DEFINE_GETSETOOP_VOLATILE(jlong, Long); |
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423 #endif |
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424 |
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425 #undef DEFINE_GETSETOOP_VOLATILE |
0 | 426 |
427 // The non-intrinsified versions of setOrdered just use setVolatile | |
428 | |
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429 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) |
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430 UnsafeWrapper("Unsafe_SetOrderedInt"); |
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431 SET_FIELD_VOLATILE(obj, offset, jint, x); |
0 | 432 UNSAFE_END |
433 | |
434 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
435 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
436 oop x = JNIHandles::resolve(x_h); | |
437 oop p = JNIHandles::resolve(obj); | |
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438 void* addr = index_oop_from_field_offset_long(p, offset); |
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439 OrderAccess::release(); |
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440 if (UseCompressedOops) { |
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441 oop_store((narrowOop*)addr, x); |
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442 } else { |
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443 oop_store((oop*)addr, x); |
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444 } |
0 | 445 OrderAccess::fence(); |
446 UNSAFE_END | |
447 | |
448 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
449 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
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450 #if defined(SPARC) || defined(X86) |
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451 // Sparc and X86 have atomic jlong (8 bytes) instructions |
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452 SET_FIELD_VOLATILE(obj, offset, jlong, x); |
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453 #else |
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454 // Keep old code for platforms which may not have atomic long (8 bytes) instructions |
0 | 455 { |
456 if (VM_Version::supports_cx8()) { | |
457 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
458 } | |
459 else { | |
460 Handle p (THREAD, JNIHandles::resolve(obj)); | |
461 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
462 ObjectLocker ol(p, THREAD); | |
463 *addr = x; | |
464 } | |
465 } | |
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466 #endif |
0 | 467 UNSAFE_END |
468 | |
469 ////// Data in the C heap. | |
470 | |
471 // Note: These do not throw NullPointerException for bad pointers. | |
472 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
473 // | |
474 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
475 \ | |
476 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
477 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
478 void* p = addr_from_java(addr); \ | |
479 JavaThread* t = JavaThread::current(); \ | |
480 t->set_doing_unsafe_access(true); \ | |
481 java_type x = *(volatile native_type*)p; \ | |
482 t->set_doing_unsafe_access(false); \ | |
483 return x; \ | |
484 UNSAFE_END \ | |
485 \ | |
486 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
487 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
488 JavaThread* t = JavaThread::current(); \ | |
489 t->set_doing_unsafe_access(true); \ | |
490 void* p = addr_from_java(addr); \ | |
491 *(volatile native_type*)p = x; \ | |
492 t->set_doing_unsafe_access(false); \ | |
493 UNSAFE_END \ | |
494 \ | |
495 // END DEFINE_GETSETNATIVE. | |
496 | |
497 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
498 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
499 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
500 DEFINE_GETSETNATIVE(jint, Int, jint); | |
501 // no long -- handled specially | |
502 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
503 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
504 | |
505 #undef DEFINE_GETSETNATIVE | |
506 | |
507 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
508 UnsafeWrapper("Unsafe_GetNativeLong"); | |
509 JavaThread* t = JavaThread::current(); | |
510 // We do it this way to avoid problems with access to heap using 64 | |
511 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
512 // some CPUs (SPARC) it leads to SIGBUS. | |
513 t->set_doing_unsafe_access(true); | |
514 void* p = addr_from_java(addr); | |
515 jlong x; | |
516 if (((intptr_t)p & 7) == 0) { | |
517 // jlong is aligned, do a volatile access | |
518 x = *(volatile jlong*)p; | |
519 } else { | |
520 jlong_accessor acc; | |
521 acc.words[0] = ((volatile jint*)p)[0]; | |
522 acc.words[1] = ((volatile jint*)p)[1]; | |
523 x = acc.long_value; | |
524 } | |
525 t->set_doing_unsafe_access(false); | |
526 return x; | |
527 UNSAFE_END | |
528 | |
529 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
530 UnsafeWrapper("Unsafe_SetNativeLong"); | |
531 JavaThread* t = JavaThread::current(); | |
532 // see comment for Unsafe_GetNativeLong | |
533 t->set_doing_unsafe_access(true); | |
534 void* p = addr_from_java(addr); | |
535 if (((intptr_t)p & 7) == 0) { | |
536 // jlong is aligned, do a volatile access | |
537 *(volatile jlong*)p = x; | |
538 } else { | |
539 jlong_accessor acc; | |
540 acc.long_value = x; | |
541 ((volatile jint*)p)[0] = acc.words[0]; | |
542 ((volatile jint*)p)[1] = acc.words[1]; | |
543 } | |
544 t->set_doing_unsafe_access(false); | |
545 UNSAFE_END | |
546 | |
547 | |
548 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
549 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
550 void* p = addr_from_java(addr); | |
551 return addr_to_java(*(void**)p); | |
552 UNSAFE_END | |
553 | |
554 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
555 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
556 void* p = addr_from_java(addr); | |
557 *(void**)p = addr_from_java(x); | |
558 UNSAFE_END | |
559 | |
560 | |
561 ////// Allocation requests | |
562 | |
563 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
564 UnsafeWrapper("Unsafe_AllocateInstance"); | |
565 { | |
566 ThreadToNativeFromVM ttnfv(thread); | |
567 return env->AllocObject(cls); | |
568 } | |
569 UNSAFE_END | |
570 | |
571 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
572 UnsafeWrapper("Unsafe_AllocateMemory"); | |
573 size_t sz = (size_t)size; | |
574 if (sz != (julong)size || size < 0) { | |
575 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
576 } | |
577 if (sz == 0) { | |
578 return 0; | |
579 } | |
580 sz = round_to(sz, HeapWordSize); | |
581 void* x = os::malloc(sz); | |
582 if (x == NULL) { | |
583 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
584 } | |
585 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
586 return addr_to_java(x); | |
587 UNSAFE_END | |
588 | |
589 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
590 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
591 void* p = addr_from_java(addr); | |
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 os::free(p); | |
598 return 0; | |
599 } | |
600 sz = round_to(sz, HeapWordSize); | |
601 void* x = (p == NULL) ? os::malloc(sz) : os::realloc(p, sz); | |
602 if (x == NULL) { | |
603 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
604 } | |
605 return addr_to_java(x); | |
606 UNSAFE_END | |
607 | |
608 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
609 UnsafeWrapper("Unsafe_FreeMemory"); | |
610 void* p = addr_from_java(addr); | |
611 if (p == NULL) { | |
612 return; | |
613 } | |
614 os::free(p); | |
615 UNSAFE_END | |
616 | |
617 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
618 UnsafeWrapper("Unsafe_SetMemory"); | |
619 size_t sz = (size_t)size; | |
620 if (sz != (julong)size || size < 0) { | |
621 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
622 } | |
623 char* p = (char*) addr_from_java(addr); | |
624 Copy::fill_to_memory_atomic(p, sz, value); | |
625 UNSAFE_END | |
626 | |
627 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
628 UnsafeWrapper("Unsafe_SetMemory"); | |
629 size_t sz = (size_t)size; | |
630 if (sz != (julong)size || size < 0) { | |
631 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
632 } | |
633 oop base = JNIHandles::resolve(obj); | |
634 void* p = index_oop_from_field_offset_long(base, offset); | |
635 Copy::fill_to_memory_atomic(p, sz, value); | |
636 UNSAFE_END | |
637 | |
638 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
639 UnsafeWrapper("Unsafe_CopyMemory"); | |
640 if (size == 0) { | |
641 return; | |
642 } | |
643 size_t sz = (size_t)size; | |
644 if (sz != (julong)size || size < 0) { | |
645 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
646 } | |
647 void* src = addr_from_java(srcAddr); | |
648 void* dst = addr_from_java(dstAddr); | |
649 Copy::conjoint_memory_atomic(src, dst, sz); | |
650 UNSAFE_END | |
651 | |
652 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
653 UnsafeWrapper("Unsafe_CopyMemory"); | |
654 if (size == 0) { | |
655 return; | |
656 } | |
657 size_t sz = (size_t)size; | |
658 if (sz != (julong)size || size < 0) { | |
659 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
660 } | |
661 oop srcp = JNIHandles::resolve(srcObj); | |
662 oop dstp = JNIHandles::resolve(dstObj); | |
663 if (dstp != NULL && !dstp->is_typeArray()) { | |
664 // NYI: This works only for non-oop arrays at present. | |
665 // Generalizing it would be reasonable, but requires card marking. | |
666 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
667 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
668 } | |
669 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
670 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
671 Copy::conjoint_memory_atomic(src, dst, sz); | |
672 UNSAFE_END | |
673 | |
674 | |
675 ////// Random queries | |
676 | |
677 // See comment at file start about UNSAFE_LEAF | |
678 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
679 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
680 UnsafeWrapper("Unsafe_AddressSize"); | |
681 return sizeof(void*); | |
682 UNSAFE_END | |
683 | |
684 // See comment at file start about UNSAFE_LEAF | |
685 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
686 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
687 UnsafeWrapper("Unsafe_PageSize"); | |
688 return os::vm_page_size(); | |
689 UNSAFE_END | |
690 | |
691 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
692 if (field == NULL) { | |
693 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
694 } | |
695 | |
696 oop reflected = JNIHandles::resolve_non_null(field); | |
697 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
698 klassOop k = java_lang_Class::as_klassOop(mirror); | |
699 int slot = java_lang_reflect_Field::slot(reflected); | |
700 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
701 | |
702 if (must_be_static >= 0) { | |
703 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
704 if (must_be_static != really_is_static) { | |
705 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
706 } | |
707 } | |
708 | |
3938 | 709 int offset = instanceKlass::cast(k)->field_offset(slot); |
0 | 710 return field_offset_from_byte_offset(offset); |
711 } | |
712 | |
713 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
714 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
715 return find_field_offset(field, 0, THREAD); | |
716 UNSAFE_END | |
717 | |
718 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
719 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
720 return find_field_offset(field, 1, THREAD); | |
721 UNSAFE_END | |
722 | |
723 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
724 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
725 // Note: In this VM implementation, a field address is always a short | |
726 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
727 // range of the return type is never used. However, some implementations | |
728 // might put the static field inside an array shared by many classes, | |
729 // or even at a fixed address, in which case the address could be quite | |
730 // large. In that last case, this function would return NULL, since | |
731 // the address would operate alone, without any base pointer. | |
732 | |
733 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
734 | |
735 oop reflected = JNIHandles::resolve_non_null(field); | |
736 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
737 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
738 | |
739 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
740 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
741 } | |
742 | |
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743 return JNIHandles::make_local(env, mirror); |
0 | 744 UNSAFE_END |
745 | |
746 //@deprecated | |
747 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
748 UnsafeWrapper("Unsafe_FieldOffset"); | |
749 // tries (but fails) to be polymorphic between static and non-static: | |
750 jlong offset = find_field_offset(field, -1, THREAD); | |
751 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
752 return (jint)offset; | |
753 UNSAFE_END | |
754 | |
755 //@deprecated | |
756 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
757 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
758 if (clazz == NULL) { | |
759 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
760 } | |
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761 return JNIHandles::make_local(env, JNIHandles::resolve_non_null(clazz)); |
0 | 762 UNSAFE_END |
763 | |
764 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) | |
765 UnsafeWrapper("Unsafe_EnsureClassInitialized"); | |
766 if (clazz == NULL) { | |
767 THROW(vmSymbols::java_lang_NullPointerException()); | |
768 } | |
769 oop mirror = JNIHandles::resolve_non_null(clazz); | |
770 instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(mirror)); | |
771 if (k != NULL) { | |
772 k->initialize(CHECK); | |
773 } | |
774 UNSAFE_END | |
775 | |
776 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
777 if (acls == NULL) { | |
778 THROW(vmSymbols::java_lang_NullPointerException()); | |
779 } | |
780 oop mirror = JNIHandles::resolve_non_null(acls); | |
781 klassOop k = java_lang_Class::as_klassOop(mirror); | |
782 if (k == NULL || !k->klass_part()->oop_is_array()) { | |
783 THROW(vmSymbols::java_lang_InvalidClassException()); | |
784 } else if (k->klass_part()->oop_is_objArray()) { | |
785 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); | |
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786 scale = heapOopSize; |
0 | 787 } else if (k->klass_part()->oop_is_typeArray()) { |
788 typeArrayKlass* tak = typeArrayKlass::cast(k); | |
789 base = tak->array_header_in_bytes(); | |
790 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
791 scale = (1 << tak->log2_element_size()); | |
792 } else { | |
793 ShouldNotReachHere(); | |
794 } | |
795 } | |
796 | |
797 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
798 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
799 int base, scale; | |
800 getBaseAndScale(base, scale, acls, CHECK_0); | |
801 return field_offset_from_byte_offset(base); | |
802 UNSAFE_END | |
803 | |
804 | |
805 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
806 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
807 int base, scale; | |
808 getBaseAndScale(base, scale, acls, CHECK_0); | |
809 // This VM packs both fields and array elements down to the byte. | |
810 // But watch out: If this changes, so that array references for | |
811 // a given primitive type (say, T_BOOLEAN) use different memory units | |
812 // than fields, this method MUST return zero for such arrays. | |
813 // For example, the VM used to store sub-word sized fields in full | |
814 // words in the object layout, so that accessors like getByte(Object,int) | |
815 // did not really do what one might expect for arrays. Therefore, | |
816 // this function used to report a zero scale factor, so that the user | |
817 // would know not to attempt to access sub-word array elements. | |
818 // // Code for unpacked fields: | |
819 // if (scale < wordSize) return 0; | |
820 | |
821 // The following allows for a pretty general fieldOffset cookie scheme, | |
822 // but requires it to be linear in byte offset. | |
823 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
824 UNSAFE_END | |
825 | |
826 | |
827 static inline void throw_new(JNIEnv *env, const char *ename) { | |
828 char buf[100]; | |
829 strcpy(buf, "java/lang/"); | |
830 strcat(buf, ename); | |
831 jclass cls = env->FindClass(buf); | |
832 char* msg = NULL; | |
833 env->ThrowNew(cls, msg); | |
834 } | |
835 | |
836 static jclass Unsafe_DefineClass(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { | |
837 { | |
838 // Code lifted from JDK 1.3 ClassLoader.c | |
839 | |
840 jbyte *body; | |
841 char *utfName; | |
842 jclass result = 0; | |
843 char buf[128]; | |
844 | |
845 if (UsePerfData) { | |
846 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
847 } | |
848 | |
849 if (data == NULL) { | |
850 throw_new(env, "NullPointerException"); | |
851 return 0; | |
852 } | |
853 | |
854 /* Work around 4153825. malloc crashes on Solaris when passed a | |
855 * negative size. | |
856 */ | |
857 if (length < 0) { | |
858 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
859 return 0; | |
860 } | |
861 | |
862 body = NEW_C_HEAP_ARRAY(jbyte, length); | |
863 | |
864 if (body == 0) { | |
865 throw_new(env, "OutOfMemoryError"); | |
866 return 0; | |
867 } | |
868 | |
869 env->GetByteArrayRegion(data, offset, length, body); | |
870 | |
871 if (env->ExceptionOccurred()) | |
872 goto free_body; | |
873 | |
874 if (name != NULL) { | |
875 uint len = env->GetStringUTFLength(name); | |
876 int unicode_len = env->GetStringLength(name); | |
877 if (len >= sizeof(buf)) { | |
878 utfName = NEW_C_HEAP_ARRAY(char, len + 1); | |
879 if (utfName == NULL) { | |
880 throw_new(env, "OutOfMemoryError"); | |
881 goto free_body; | |
882 } | |
883 } else { | |
884 utfName = buf; | |
885 } | |
886 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
887 //VerifyFixClassname(utfName); | |
888 for (uint i = 0; i < len; i++) { | |
889 if (utfName[i] == '.') utfName[i] = '/'; | |
890 } | |
891 } else { | |
892 utfName = NULL; | |
893 } | |
894 | |
895 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
896 | |
897 if (utfName && utfName != buf) | |
898 FREE_C_HEAP_ARRAY(char, utfName); | |
899 | |
900 free_body: | |
901 FREE_C_HEAP_ARRAY(jbyte, body); | |
902 return result; | |
903 } | |
904 } | |
905 | |
906 | |
907 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) | |
908 UnsafeWrapper("Unsafe_DefineClass"); | |
909 { | |
910 ThreadToNativeFromVM ttnfv(thread); | |
911 | |
912 int depthFromDefineClass0 = 1; | |
913 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
914 jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller); | |
915 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); | |
916 | |
917 return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); | |
918 } | |
919 UNSAFE_END | |
920 | |
921 | |
922 UNSAFE_ENTRY(jclass, Unsafe_DefineClass1(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd)) | |
923 UnsafeWrapper("Unsafe_DefineClass"); | |
924 { | |
925 ThreadToNativeFromVM ttnfv(thread); | |
926 | |
927 return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); | |
928 } | |
929 UNSAFE_END | |
930 | |
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931 #define DAC_Args CLS"[B["OBJ |
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932 // define a class but do not make it known to the class loader or system dictionary |
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933 // - host_class: supplies context for linkage, access control, protection domain, and class loader |
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934 // - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
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935 // - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
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936 |
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937 // When you load an anonymous class U, it works as if you changed its name just before loading, |
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938 // to a name that you will never use again. Since the name is lost, no other class can directly |
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939 // link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
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940 // through java.lang.Class methods like Class.newInstance. |
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941 |
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942 // Access checks for linkage sites within U continue to follow the same rules as for named classes. |
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943 // The package of an anonymous class is given by the package qualifier on the name under which it was loaded. |
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944 // An anonymous class also has special privileges to access any member of its host class. |
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945 // This is the main reason why this loading operation is unsafe. The purpose of this is to |
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946 // allow language implementations to simulate "open classes"; a host class in effect gets |
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947 // new code when an anonymous class is loaded alongside it. A less convenient but more |
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948 // standard way to do this is with reflection, which can also be set to ignore access |
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949 // restrictions. |
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950 |
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951 // Access into an anonymous class is possible only through reflection. Therefore, there |
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952 // are no special access rules for calling into an anonymous class. The relaxed access |
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953 // rule for the host class is applied in the opposite direction: A host class reflectively |
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954 // access one of its anonymous classes. |
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955 |
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956 // If you load the same bytecodes twice, you get two different classes. You can reload |
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957 // the same bytecodes with or without varying CP patches. |
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958 |
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959 // By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
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960 // The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
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961 // The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
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962 |
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963 // This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
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964 // an outer class (so that U2 is an anonymous inner class of anonymous U1). |
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965 // It is not possible for a named class, or an older anonymous class, to refer by |
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966 // name (via its CP) to a newer anonymous class. |
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967 |
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968 // CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
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969 // or type descriptors used in the loaded anonymous class. |
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970 |
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971 // Finally, CP patching may be used to introduce "live" objects into the constant pool, |
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972 // instead of "dead" strings. A compiled statement like println((Object)"hello") can |
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973 // be changed to println(greeting), where greeting is an arbitrary object created before |
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974 // the anonymous class is loaded. This is useful in dynamic languages, in which |
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975 // various kinds of metaobjects must be introduced as constants into bytecode. |
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976 // Note the cast (Object), which tells the verifier to expect an arbitrary object, |
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977 // not just a literal string. For such ldc instructions, the verifier uses the |
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978 // type Object instead of String, if the loaded constant is not in fact a String. |
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979 |
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980 static oop |
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981 Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
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982 jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
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983 HeapWord* *temp_alloc, |
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984 TRAPS) { |
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985 |
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986 if (UsePerfData) { |
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987 ClassLoader::unsafe_defineClassCallCounter()->inc(); |
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988 } |
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989 |
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990 if (data == NULL) { |
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991 THROW_0(vmSymbols::java_lang_NullPointerException()); |
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992 } |
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993 |
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994 jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
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995 jint word_length = (length + sizeof(HeapWord)-1) / sizeof(HeapWord); |
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996 HeapWord* body = NEW_C_HEAP_ARRAY(HeapWord, word_length); |
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997 if (body == NULL) { |
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998 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
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999 } |
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1000 |
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1001 // caller responsible to free it: |
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1002 (*temp_alloc) = body; |
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1003 |
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1004 { |
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1005 jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
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1006 Copy::conjoint_words((HeapWord*) array_base, body, word_length); |
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1007 } |
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1008 |
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1009 u1* class_bytes = (u1*) body; |
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1010 int class_bytes_length = (int) length; |
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1011 if (class_bytes_length < 0) class_bytes_length = 0; |
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1012 if (class_bytes == NULL |
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1013 || host_class == NULL |
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1014 || length != class_bytes_length) |
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1015 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1016 |
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1017 objArrayHandle cp_patches_h; |
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1018 if (cp_patches_jh != NULL) { |
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1019 oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
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1020 if (!p->is_objArray()) |
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1021 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1022 cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
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1023 } |
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1024 |
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1025 KlassHandle host_klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(host_class))); |
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1026 const char* host_source = host_klass->external_name(); |
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1027 Handle host_loader(THREAD, host_klass->class_loader()); |
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1028 Handle host_domain(THREAD, host_klass->protection_domain()); |
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1029 |
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1030 GrowableArray<Handle>* cp_patches = NULL; |
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1031 if (cp_patches_h.not_null()) { |
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1032 int alen = cp_patches_h->length(); |
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1033 for (int i = alen-1; i >= 0; i--) { |
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1034 oop p = cp_patches_h->obj_at(i); |
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1035 if (p != NULL) { |
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1036 Handle patch(THREAD, p); |
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1037 if (cp_patches == NULL) |
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1038 cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
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1039 cp_patches->at_put(i, patch); |
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1040 } |
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1041 } |
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1042 } |
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1043 |
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1044 ClassFileStream st(class_bytes, class_bytes_length, (char*) host_source); |
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1045 |
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1046 instanceKlassHandle anon_klass; |
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1047 { |
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1048 Symbol* no_class_name = NULL; |
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1049 klassOop anonk = SystemDictionary::parse_stream(no_class_name, |
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1050 host_loader, host_domain, |
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1051 &st, host_klass, cp_patches, |
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1052 CHECK_NULL); |
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1053 if (anonk == NULL) return NULL; |
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1054 anon_klass = instanceKlassHandle(THREAD, anonk); |
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1055 } |
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1056 |
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1057 // let caller initialize it as needed... |
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1058 |
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1059 return anon_klass->java_mirror(); |
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1060 } |
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1061 |
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1062 UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) |
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1063 { |
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1064 UnsafeWrapper("Unsafe_DefineAnonymousClass"); |
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1065 ResourceMark rm(THREAD); |
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1066 |
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1067 HeapWord* temp_alloc = NULL; |
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1068 |
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1069 jobject res_jh = NULL; |
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1070 |
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1071 { oop res_oop = Unsafe_DefineAnonymousClass_impl(env, |
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1072 host_class, data, cp_patches_jh, |
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1073 &temp_alloc, THREAD); |
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1074 if (res_oop != NULL) |
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1075 res_jh = JNIHandles::make_local(env, res_oop); |
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1076 } |
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1077 |
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1078 // try/finally clause: |
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1079 if (temp_alloc != NULL) { |
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1080 FREE_C_HEAP_ARRAY(HeapWord, temp_alloc); |
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1081 } |
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1082 |
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1083 return (jclass) res_jh; |
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1084 } |
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1085 UNSAFE_END |
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1086 |
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1087 |
0 | 1088 |
1089 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1090 UnsafeWrapper("Unsafe_MonitorEnter"); | |
1091 { | |
1092 if (jobj == NULL) { | |
1093 THROW(vmSymbols::java_lang_NullPointerException()); | |
1094 } | |
1095 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1096 ObjectSynchronizer::jni_enter(obj, CHECK); | |
1097 } | |
1098 UNSAFE_END | |
1099 | |
1100 | |
1101 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1102 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
1103 { | |
1104 if (jobj == NULL) { | |
1105 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
1106 } | |
1107 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
1108 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
1109 return (res ? JNI_TRUE : JNI_FALSE); | |
1110 } | |
1111 UNSAFE_END | |
1112 | |
1113 | |
1114 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
1115 UnsafeWrapper("Unsafe_MonitorExit"); | |
1116 { | |
1117 if (jobj == NULL) { | |
1118 THROW(vmSymbols::java_lang_NullPointerException()); | |
1119 } | |
1120 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
1121 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
1122 } | |
1123 UNSAFE_END | |
1124 | |
1125 | |
1126 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
1127 UnsafeWrapper("Unsafe_ThrowException"); | |
1128 { | |
1129 ThreadToNativeFromVM ttnfv(thread); | |
1130 env->Throw(thr); | |
1131 } | |
1132 UNSAFE_END | |
1133 | |
1134 // JSR166 ------------------------------------------------------------------ | |
1135 | |
1136 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
1137 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
1138 oop x = JNIHandles::resolve(x_h); | |
1139 oop e = JNIHandles::resolve(e_h); | |
1140 oop p = JNIHandles::resolve(obj); | |
113
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1141 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
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1142 if (UseCompressedOops) { |
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1143 update_barrier_set_pre((narrowOop*)addr, e); |
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1144 } else { |
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1145 update_barrier_set_pre((oop*)addr, e); |
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1146 } |
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1147 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e); |
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1148 jboolean success = (res == e); |
0 | 1149 if (success) |
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1150 update_barrier_set((void*)addr, x); |
0 | 1151 return success; |
1152 UNSAFE_END | |
1153 | |
1154 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
1155 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
1156 oop p = JNIHandles::resolve(obj); | |
1157 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
1158 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
1159 UNSAFE_END | |
1160 | |
1161 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
1162 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
1163 Handle p (THREAD, JNIHandles::resolve(obj)); | |
1164 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
1165 if (VM_Version::supports_cx8()) | |
1166 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
1167 else { | |
1168 jboolean success = false; | |
1169 ObjectLocker ol(p, THREAD); | |
1170 if (*addr == e) { *addr = x; success = true; } | |
1171 return success; | |
1172 } | |
1173 UNSAFE_END | |
1174 | |
1175 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
1176 UnsafeWrapper("Unsafe_Park"); | |
4006 | 1177 #ifndef USDT2 |
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1178 HS_DTRACE_PROBE3(hotspot, thread__park__begin, thread->parker(), (int) isAbsolute, time); |
4006 | 1179 #else /* USDT2 */ |
1180 HOTSPOT_THREAD_PARK_BEGIN( | |
1181 (uintptr_t) thread->parker(), (int) isAbsolute, time); | |
1182 #endif /* USDT2 */ | |
0 | 1183 JavaThreadParkedState jtps(thread, time != 0); |
1184 thread->parker()->park(isAbsolute != 0, time); | |
4006 | 1185 #ifndef USDT2 |
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1186 HS_DTRACE_PROBE1(hotspot, thread__park__end, thread->parker()); |
4006 | 1187 #else /* USDT2 */ |
1188 HOTSPOT_THREAD_PARK_END( | |
1189 (uintptr_t) thread->parker()); | |
1190 #endif /* USDT2 */ | |
0 | 1191 UNSAFE_END |
1192 | |
1193 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
1194 UnsafeWrapper("Unsafe_Unpark"); | |
1195 Parker* p = NULL; | |
1196 if (jthread != NULL) { | |
1197 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
1198 if (java_thread != NULL) { | |
1199 jlong lp = java_lang_Thread::park_event(java_thread); | |
1200 if (lp != 0) { | |
1201 // This cast is OK even though the jlong might have been read | |
1202 // non-atomically on 32bit systems, since there, one word will | |
1203 // always be zero anyway and the value set is always the same | |
1204 p = (Parker*)addr_from_java(lp); | |
1205 } else { | |
1206 // Grab lock if apparently null or using older version of library | |
1207 MutexLocker mu(Threads_lock); | |
1208 java_thread = JNIHandles::resolve_non_null(jthread); | |
1209 if (java_thread != NULL) { | |
1210 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
1211 if (thr != NULL) { | |
1212 p = thr->parker(); | |
1213 if (p != NULL) { // Bind to Java thread for next time. | |
1214 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
1215 } | |
1216 } | |
1217 } | |
1218 } | |
1219 } | |
1220 } | |
1221 if (p != NULL) { | |
4006 | 1222 #ifndef USDT2 |
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1223 HS_DTRACE_PROBE1(hotspot, thread__unpark, p); |
4006 | 1224 #else /* USDT2 */ |
1225 HOTSPOT_THREAD_UNPARK( | |
1226 (uintptr_t) p); | |
1227 #endif /* USDT2 */ | |
0 | 1228 p->unpark(); |
1229 } | |
1230 UNSAFE_END | |
1231 | |
1232 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
1233 UnsafeWrapper("Unsafe_Loadavg"); | |
1234 const int max_nelem = 3; | |
1235 double la[max_nelem]; | |
1236 jint ret; | |
1237 | |
1238 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
1239 assert(a->is_typeArray(), "must be type array"); | |
1240 | |
1241 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
1242 ThreadToNativeFromVM ttnfv(thread); | |
1243 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
1244 return -1; | |
1245 } | |
1246 | |
1247 ret = os::loadavg(la, nelem); | |
1248 if (ret == -1) return -1; | |
1249 | |
1250 // if successful, ret is the number of samples actually retrieved. | |
1251 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
1252 switch(ret) { | |
1253 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
1254 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
1255 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
1256 } | |
1257 return ret; | |
1258 UNSAFE_END | |
1259 | |
1260 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1261 UnsafeWrapper("Unsafe_PrefetchRead"); | |
1262 oop p = JNIHandles::resolve(obj); | |
1263 void* addr = index_oop_from_field_offset_long(p, 0); | |
1264 Prefetch::read(addr, (intx)offset); | |
1265 UNSAFE_END | |
1266 | |
1267 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
1268 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
1269 oop p = JNIHandles::resolve(obj); | |
1270 void* addr = index_oop_from_field_offset_long(p, 0); | |
1271 Prefetch::write(addr, (intx)offset); | |
1272 UNSAFE_END | |
1273 | |
1274 | |
1275 /// JVM_RegisterUnsafeMethods | |
1276 | |
1277 #define ADR "J" | |
1278 | |
1279 #define LANG "Ljava/lang/" | |
1280 | |
1281 #define OBJ LANG"Object;" | |
1282 #define CLS LANG"Class;" | |
1283 #define CTR LANG"reflect/Constructor;" | |
1284 #define FLD LANG"reflect/Field;" | |
1285 #define MTH LANG"reflect/Method;" | |
1286 #define THR LANG"Throwable;" | |
1287 | |
1288 #define DC0_Args LANG"String;[BII" | |
1289 #define DC1_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" | |
1290 | |
1291 #define CC (char*) /*cast a literal from (const char*)*/ | |
1292 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
1293 | |
1294 // define deprecated accessors for compabitility with 1.4.0 | |
1295 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
1296 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
1297 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
1298 | |
1299 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
1300 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
1301 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1302 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
1303 | |
1304 // Note: In 1.5.0, there are volatile versions too | |
1305 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
1306 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
1307 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
1308 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
1309 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
1310 | |
1311 | |
1312 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
1313 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
1314 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
1315 | |
1316 | |
1317 | |
1318 // %%% These are temporarily supported until the SDK sources | |
1319 // contain the necessarily updated Unsafe.java. | |
1320 static JNINativeMethod methods_140[] = { | |
1321 | |
1322 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
1323 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
1324 | |
1325 DECLARE_GETSETOOP_140(Boolean, Z), | |
1326 DECLARE_GETSETOOP_140(Byte, B), | |
1327 DECLARE_GETSETOOP_140(Short, S), | |
1328 DECLARE_GETSETOOP_140(Char, C), | |
1329 DECLARE_GETSETOOP_140(Int, I), | |
1330 DECLARE_GETSETOOP_140(Long, J), | |
1331 DECLARE_GETSETOOP_140(Float, F), | |
1332 DECLARE_GETSETOOP_140(Double, D), | |
1333 | |
1334 DECLARE_GETSETNATIVE(Byte, B), | |
1335 DECLARE_GETSETNATIVE(Short, S), | |
1336 DECLARE_GETSETNATIVE(Char, C), | |
1337 DECLARE_GETSETNATIVE(Int, I), | |
1338 DECLARE_GETSETNATIVE(Long, J), | |
1339 DECLARE_GETSETNATIVE(Float, F), | |
1340 DECLARE_GETSETNATIVE(Double, D), | |
1341 | |
1342 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1343 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1344 | |
1345 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1346 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1347 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1348 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1349 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1350 | |
1351 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, //deprecated | |
1352 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, //deprecated | |
1353 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1354 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1355 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1356 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1357 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1358 | |
1359 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1360 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1361 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1362 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1363 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1364 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1365 }; | |
1366 | |
1367 // These are the old methods prior to the JSR 166 changes in 1.5.0 | |
1368 static JNINativeMethod methods_141[] = { | |
1369 | |
1370 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1371 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1372 | |
1373 DECLARE_GETSETOOP_141(Boolean, Z), | |
1374 DECLARE_GETSETOOP_141(Byte, B), | |
1375 DECLARE_GETSETOOP_141(Short, S), | |
1376 DECLARE_GETSETOOP_141(Char, C), | |
1377 DECLARE_GETSETOOP_141(Int, I), | |
1378 DECLARE_GETSETOOP_141(Long, J), | |
1379 DECLARE_GETSETOOP_141(Float, F), | |
1380 DECLARE_GETSETOOP_141(Double, D), | |
1381 | |
1382 DECLARE_GETSETNATIVE(Byte, B), | |
1383 DECLARE_GETSETNATIVE(Short, S), | |
1384 DECLARE_GETSETNATIVE(Char, C), | |
1385 DECLARE_GETSETNATIVE(Int, I), | |
1386 DECLARE_GETSETNATIVE(Long, J), | |
1387 DECLARE_GETSETNATIVE(Float, F), | |
1388 DECLARE_GETSETNATIVE(Double, D), | |
1389 | |
1390 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1391 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1392 | |
1393 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1394 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1395 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1396 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1397 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1398 | |
1399 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1400 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1401 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1402 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1403 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1404 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1405 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1406 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1407 | |
1408 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1409 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1410 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1411 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1412 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1413 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
1414 | |
1415 }; | |
1416 | |
1417 // These are the old methods prior to the JSR 166 changes in 1.6.0 | |
1418 static JNINativeMethod methods_15[] = { | |
1419 | |
1420 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1421 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1422 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1423 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1424 | |
1425 | |
1426 DECLARE_GETSETOOP(Boolean, Z), | |
1427 DECLARE_GETSETOOP(Byte, B), | |
1428 DECLARE_GETSETOOP(Short, S), | |
1429 DECLARE_GETSETOOP(Char, C), | |
1430 DECLARE_GETSETOOP(Int, I), | |
1431 DECLARE_GETSETOOP(Long, J), | |
1432 DECLARE_GETSETOOP(Float, F), | |
1433 DECLARE_GETSETOOP(Double, D), | |
1434 | |
1435 DECLARE_GETSETNATIVE(Byte, B), | |
1436 DECLARE_GETSETNATIVE(Short, S), | |
1437 DECLARE_GETSETNATIVE(Char, C), | |
1438 DECLARE_GETSETNATIVE(Int, I), | |
1439 DECLARE_GETSETNATIVE(Long, J), | |
1440 DECLARE_GETSETNATIVE(Float, F), | |
1441 DECLARE_GETSETNATIVE(Double, D), | |
1442 | |
1443 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1444 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1445 | |
1446 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1447 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1448 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1449 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1450 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1451 | |
1452 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1453 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1454 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1455 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1456 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1457 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1458 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1459 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1460 | |
1461 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1462 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1463 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1464 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1465 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1466 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1467 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1468 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1469 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1470 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1471 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1472 | |
1473 }; | |
1474 | |
1475 // These are the correct methods, moving forward: | |
1476 static JNINativeMethod methods[] = { | |
1477 | |
1478 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
1479 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
1480 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
1481 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
1482 | |
1483 | |
1484 DECLARE_GETSETOOP(Boolean, Z), | |
1485 DECLARE_GETSETOOP(Byte, B), | |
1486 DECLARE_GETSETOOP(Short, S), | |
1487 DECLARE_GETSETOOP(Char, C), | |
1488 DECLARE_GETSETOOP(Int, I), | |
1489 DECLARE_GETSETOOP(Long, J), | |
1490 DECLARE_GETSETOOP(Float, F), | |
1491 DECLARE_GETSETOOP(Double, D), | |
1492 | |
1493 DECLARE_GETSETNATIVE(Byte, B), | |
1494 DECLARE_GETSETNATIVE(Short, S), | |
1495 DECLARE_GETSETNATIVE(Char, C), | |
1496 DECLARE_GETSETNATIVE(Int, I), | |
1497 DECLARE_GETSETNATIVE(Long, J), | |
1498 DECLARE_GETSETNATIVE(Float, F), | |
1499 DECLARE_GETSETNATIVE(Double, D), | |
1500 | |
1501 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
1502 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
1503 | |
1504 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
1505 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
1506 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1507 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
1508 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
1509 | |
1510 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
1511 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
1512 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
1513 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
1514 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
1515 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
1516 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
1517 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
1518 | |
1519 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
1520 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
1521 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
1522 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
1523 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
1524 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
1525 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
1526 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
1527 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
1528 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
1529 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
1530 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
1531 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
1532 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
1533 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
1534 | |
1535 // {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)}, | |
1536 | |
1537 // {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1538 // {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1539 // {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1540 // {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1541 | |
1542 }; | |
1543 | |
1544 JNINativeMethod loadavg_method[] = { | |
1545 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} | |
1546 }; | |
1547 | |
1548 JNINativeMethod prefetch_methods[] = { | |
1549 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1550 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
1551 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
1552 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
1553 }; | |
1554 | |
1555 JNINativeMethod memcopy_methods[] = { | |
1556 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, | |
1557 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
1558 }; | |
1559 | |
1560 JNINativeMethod memcopy_methods_15[] = { | |
1561 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
1562 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
1563 }; | |
1564 | |
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1565 JNINativeMethod anonk_methods[] = { |
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1566 {CC"defineAnonymousClass", CC"("DAC_Args")"CLS, FN_PTR(Unsafe_DefineAnonymousClass)}, |
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1567 }; |
0 | 1568 |
1569 #undef CC | |
1570 #undef FN_PTR | |
1571 | |
1572 #undef ADR | |
1573 #undef LANG | |
1574 #undef OBJ | |
1575 #undef CLS | |
1576 #undef CTR | |
1577 #undef FLD | |
1578 #undef MTH | |
1579 #undef THR | |
1580 #undef DC0_Args | |
1581 #undef DC1_Args | |
1582 | |
1583 #undef DECLARE_GETSETOOP | |
1584 #undef DECLARE_GETSETNATIVE | |
1585 | |
1586 | |
1587 // This one function is exported, used by NativeLookup. | |
1588 // The Unsafe_xxx functions above are called only from the interpreter. | |
1589 // The optimizer looks at names and signatures to recognize | |
1590 // individual functions. | |
1591 | |
1592 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
1593 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
1594 { | |
1595 ThreadToNativeFromVM ttnfv(thread); | |
1596 { | |
1597 env->RegisterNatives(unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); | |
1598 if (env->ExceptionOccurred()) { | |
1599 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1600 tty->print_cr("Warning: SDK 1.6 Unsafe.loadavg not found."); | |
1601 } | |
1602 env->ExceptionClear(); | |
1603 } | |
1604 } | |
1605 { | |
1606 env->RegisterNatives(unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); | |
1607 if (env->ExceptionOccurred()) { | |
1608 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1609 tty->print_cr("Warning: SDK 1.6 Unsafe.prefetchRead/Write not found."); | |
1610 } | |
1611 env->ExceptionClear(); | |
1612 } | |
1613 } | |
1614 { | |
1615 env->RegisterNatives(unsafecls, memcopy_methods, sizeof(memcopy_methods)/sizeof(JNINativeMethod)); | |
1616 if (env->ExceptionOccurred()) { | |
1617 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1618 tty->print_cr("Warning: SDK 1.7 Unsafe.copyMemory not found."); | |
1619 } | |
1620 env->ExceptionClear(); | |
1621 env->RegisterNatives(unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); | |
1622 if (env->ExceptionOccurred()) { | |
1623 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1624 tty->print_cr("Warning: SDK 1.5 Unsafe.copyMemory not found."); | |
1625 } | |
1626 env->ExceptionClear(); | |
1627 } | |
1628 } | |
1629 } | |
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1630 if (EnableInvokeDynamic) { |
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1631 env->RegisterNatives(unsafecls, anonk_methods, sizeof(anonk_methods)/sizeof(JNINativeMethod)); |
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1632 if (env->ExceptionOccurred()) { |
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1633 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1634 tty->print_cr("Warning: SDK 1.7 Unsafe.defineClass (anonymous version) not found."); |
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1635 } |
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1636 env->ExceptionClear(); |
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1637 } |
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1638 } |
0 | 1639 int status = env->RegisterNatives(unsafecls, methods, sizeof(methods)/sizeof(JNINativeMethod)); |
1640 if (env->ExceptionOccurred()) { | |
1641 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1642 tty->print_cr("Warning: SDK 1.6 version of Unsafe not found."); | |
1643 } | |
1644 env->ExceptionClear(); | |
1645 // %%% For now, be backward compatible with an older class: | |
1646 status = env->RegisterNatives(unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); | |
1647 } | |
1648 if (env->ExceptionOccurred()) { | |
1649 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1650 tty->print_cr("Warning: SDK 1.5 version of Unsafe not found."); | |
1651 } | |
1652 env->ExceptionClear(); | |
1653 // %%% For now, be backward compatible with an older class: | |
1654 status = env->RegisterNatives(unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); | |
1655 } | |
1656 if (env->ExceptionOccurred()) { | |
1657 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
1658 tty->print_cr("Warning: SDK 1.4.1 version of Unsafe not found."); | |
1659 } | |
1660 env->ExceptionClear(); | |
1661 // %%% For now, be backward compatible with an older class: | |
1662 status = env->RegisterNatives(unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); | |
1663 } | |
1664 guarantee(status == 0, "register unsafe natives"); | |
1665 } | |
1666 JVM_END |