Mercurial > hg > truffle
annotate src/share/vm/prims/unsafe.cpp @ 2376:c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
Reviewed-by: kvn, coleenp, twisti, stefank
| author | never |
|---|---|
| date | Fri, 18 Mar 2011 16:00:34 -0700 |
| parents | d411927672ed |
| children | 38fea01eb669 e1162778c1c8 |
| rev | line source |
|---|---|
| 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" | |
| 27 #include "memory/allocation.inline.hpp" | |
| 28 #include "prims/jni.h" | |
| 29 #include "prims/jvm.h" | |
| 30 #include "runtime/globals.hpp" | |
| 31 #include "runtime/interfaceSupport.hpp" | |
| 32 #include "runtime/reflection.hpp" | |
| 33 #include "runtime/reflectionCompat.hpp" | |
| 34 #include "runtime/synchronizer.hpp" | |
| 35 #include "services/threadService.hpp" | |
| 36 #include "utilities/copy.hpp" | |
| 37 #include "utilities/dtrace.hpp" | |
| 38 | |
| 0 | 39 /* |
| 40 * Implementation of class sun.misc.Unsafe | |
| 41 */ | |
| 42 | |
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43 HS_DTRACE_PROBE_DECL3(hotspot, thread__park__begin, uintptr_t, int, long long); |
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44 HS_DTRACE_PROBE_DECL1(hotspot, thread__park__end, uintptr_t); |
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45 HS_DTRACE_PROBE_DECL1(hotspot, thread__unpark, uintptr_t); |
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46 |
| 0 | 47 #define MAX_OBJECT_SIZE \ |
| 48 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ | |
| 49 + ((julong)max_jint * sizeof(double)) ) | |
| 50 | |
| 51 | |
| 52 #define UNSAFE_ENTRY(result_type, header) \ | |
| 53 JVM_ENTRY(result_type, header) | |
| 54 | |
| 55 // Can't use UNSAFE_LEAF because it has the signature of a straight | |
| 56 // call into the runtime (just like JVM_LEAF, funny that) but it's | |
| 57 // called like a Java Native and thus the wrapper built for it passes | |
| 58 // arguments like a JNI call. It expects those arguments to be popped | |
| 59 // from the stack on Intel like all good JNI args are, and adjusts the | |
| 60 // stack according. Since the JVM_LEAF call expects no extra | |
| 61 // arguments the stack isn't popped in the C code, is pushed by the | |
| 62 // wrapper and we get sick. | |
| 63 //#define UNSAFE_LEAF(result_type, header) \ | |
| 64 // JVM_LEAF(result_type, header) | |
| 65 | |
| 66 #define UNSAFE_END JVM_END | |
| 67 | |
| 68 #define UnsafeWrapper(arg) /*nothing, for the present*/ | |
| 69 | |
| 70 | |
| 71 inline void* addr_from_java(jlong addr) { | |
| 72 // This assert fails in a variety of ways on 32-bit systems. | |
| 73 // It is impossible to predict whether native code that converts | |
| 74 // pointers to longs will sign-extend or zero-extend the addresses. | |
| 75 //assert(addr == (uintptr_t)addr, "must not be odd high bits"); | |
| 76 return (void*)(uintptr_t)addr; | |
| 77 } | |
| 78 | |
| 79 inline jlong addr_to_java(void* p) { | |
| 80 assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); | |
| 81 return (uintptr_t)p; | |
| 82 } | |
| 83 | |
| 84 | |
| 85 // Note: The VM's obj_field and related accessors use byte-scaled | |
| 86 // ("unscaled") offsets, just as the unsafe methods do. | |
| 87 | |
| 88 // However, the method Unsafe.fieldOffset explicitly declines to | |
| 89 // guarantee this. The field offset values manipulated by the Java user | |
| 90 // through the Unsafe API are opaque cookies that just happen to be byte | |
| 91 // offsets. We represent this state of affairs by passing the cookies | |
| 92 // through conversion functions when going between the VM and the Unsafe API. | |
| 93 // The conversion functions just happen to be no-ops at present. | |
| 94 | |
| 95 inline jlong field_offset_to_byte_offset(jlong field_offset) { | |
| 96 return field_offset; | |
| 97 } | |
| 98 | |
| 99 inline jlong field_offset_from_byte_offset(jlong byte_offset) { | |
| 100 return byte_offset; | |
| 101 } | |
| 102 | |
| 103 inline jint invocation_key_from_method_slot(jint slot) { | |
| 104 return slot; | |
| 105 } | |
| 106 | |
| 107 inline jint invocation_key_to_method_slot(jint key) { | |
| 108 return key; | |
| 109 } | |
| 110 | |
| 111 inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { | |
| 112 jlong byte_offset = field_offset_to_byte_offset(field_offset); | |
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113 // Don't allow unsafe to be used to read or write the header word of oops |
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114 assert(p == NULL || field_offset >= oopDesc::header_size(), "offset must be outside of header"); |
| 0 | 115 #ifdef ASSERT |
| 116 if (p != NULL) { | |
| 117 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
| 118 if (byte_offset == (jint)byte_offset) { | |
| 119 void* ptr_plus_disp = (address)p + byte_offset; | |
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120 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
| 0 | 121 "raw [ptr+disp] must be consistent with oop::field_base"); |
| 122 } | |
| 123 } | |
| 124 #endif | |
| 125 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
| 126 return (address)p + (jint) byte_offset; | |
| 127 else | |
| 128 return (address)p + byte_offset; | |
| 129 } | |
| 130 | |
| 131 // Externally callable versions: | |
| 132 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
| 133 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
| 134 return field_offset; | |
| 135 } | |
| 136 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
| 137 return byte_offset; | |
| 138 } | |
| 139 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
| 140 return invocation_key_from_method_slot(slot); | |
| 141 } | |
| 142 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
| 143 return invocation_key_to_method_slot(key); | |
| 144 } | |
| 145 | |
| 146 | |
| 147 ///// Data in the Java heap. | |
| 148 | |
| 149 #define GET_FIELD(obj, offset, type_name, v) \ | |
| 150 oop p = JNIHandles::resolve(obj); \ | |
| 151 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
| 152 | |
| 153 #define SET_FIELD(obj, offset, type_name, x) \ | |
| 154 oop p = JNIHandles::resolve(obj); \ | |
| 155 *(type_name*)index_oop_from_field_offset_long(p, offset) = x | |
| 156 | |
| 157 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
| 158 oop p = JNIHandles::resolve(obj); \ | |
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159 volatile type_name v = OrderAccess::load_acquire((volatile type_name*)index_oop_from_field_offset_long(p, offset)); |
| 0 | 160 |
| 161 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
| 162 oop p = JNIHandles::resolve(obj); \ | |
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163 OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), x); |
| 0 | 164 |
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165 // Macros for oops that check UseCompressedOops |
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166 |
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167 #define GET_OOP_FIELD(obj, offset, v) \ |
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168 oop p = JNIHandles::resolve(obj); \ |
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169 oop v; \ |
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170 if (UseCompressedOops) { \ |
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171 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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172 v = oopDesc::decode_heap_oop(n); \ |
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173 } else { \ |
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174 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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175 } |
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176 |
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177 #define GET_OOP_FIELD_VOLATILE(obj, offset, v) \ |
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178 oop p = JNIHandles::resolve(obj); \ |
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179 volatile oop v; \ |
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180 if (UseCompressedOops) { \ |
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181 volatile narrowOop n = *(volatile narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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182 v = oopDesc::decode_heap_oop(n); \ |
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183 } else { \ |
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184 v = *(volatile oop*)index_oop_from_field_offset_long(p, offset); \ |
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185 } \ |
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186 OrderAccess::acquire(); |
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187 |
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188 |
| 0 | 189 // Get/SetObject must be special-cased, since it works with handles. |
| 190 | |
| 191 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
| 192 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
| 193 UnsafeWrapper("Unsafe_GetObject"); | |
| 194 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
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195 GET_OOP_FIELD(obj, offset, v) |
| 0 | 196 return JNIHandles::make_local(env, v); |
| 197 UNSAFE_END | |
| 198 | |
| 199 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
| 200 UnsafeWrapper("Unsafe_SetObject"); | |
| 201 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
| 202 oop x = JNIHandles::resolve(x_h); | |
| 203 //SET_FIELD(obj, offset, oop, x); | |
| 204 oop p = JNIHandles::resolve(obj); | |
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205 if (UseCompressedOops) { |
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206 if (x != NULL) { |
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207 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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208 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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209 } else { |
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210 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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211 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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212 } |
| 0 | 213 } else { |
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214 if (x != NULL) { |
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215 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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216 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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217 } else { |
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218 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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219 } |
| 0 | 220 } |
| 221 UNSAFE_END | |
| 222 | |
| 223 // The normal variants allow a null base pointer with an arbitrary address. | |
| 224 // But if the base pointer is non-null, the offset should make some sense. | |
| 225 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
| 226 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 227 UnsafeWrapper("Unsafe_GetObject"); | |
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228 GET_OOP_FIELD(obj, offset, v) |
| 0 | 229 return JNIHandles::make_local(env, v); |
| 230 UNSAFE_END | |
| 231 | |
| 232 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 233 UnsafeWrapper("Unsafe_SetObject"); | |
| 234 oop x = JNIHandles::resolve(x_h); | |
| 235 oop p = JNIHandles::resolve(obj); | |
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236 if (UseCompressedOops) { |
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237 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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238 } else { |
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239 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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240 } |
| 0 | 241 UNSAFE_END |
| 242 | |
| 243 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 244 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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245 GET_OOP_FIELD_VOLATILE(obj, offset, v) |
| 0 | 246 return JNIHandles::make_local(env, v); |
| 247 UNSAFE_END | |
| 248 | |
| 249 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 250 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
| 251 oop x = JNIHandles::resolve(x_h); | |
| 252 oop p = JNIHandles::resolve(obj); | |
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253 void* addr = index_oop_from_field_offset_long(p, offset); |
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254 OrderAccess::release(); |
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255 if (UseCompressedOops) { |
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256 oop_store((narrowOop*)addr, x); |
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257 } else { |
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258 oop_store((oop*)addr, x); |
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259 } |
| 0 | 260 OrderAccess::fence(); |
| 261 UNSAFE_END | |
| 262 | |
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263 #if defined(SPARC) || defined(X86) |
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264 // Sparc and X86 have atomic jlong (8 bytes) instructions |
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265 |
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266 #else |
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267 // Keep old code for platforms which may not have atomic jlong (8 bytes) instructions |
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268 |
| 0 | 269 // Volatile long versions must use locks if !VM_Version::supports_cx8(). |
| 270 // support_cx8 is a surrogate for 'supports atomic long memory ops'. | |
| 271 | |
| 272 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 273 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
| 274 { | |
| 275 if (VM_Version::supports_cx8()) { | |
| 276 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
| 277 return v; | |
| 278 } | |
| 279 else { | |
| 280 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 281 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 282 ObjectLocker ol(p, THREAD); | |
| 283 jlong value = *addr; | |
| 284 return value; | |
| 285 } | |
| 286 } | |
| 287 UNSAFE_END | |
| 288 | |
| 289 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
| 290 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
| 291 { | |
| 292 if (VM_Version::supports_cx8()) { | |
| 293 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
| 294 } | |
| 295 else { | |
| 296 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 297 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 298 ObjectLocker ol(p, THREAD); | |
| 299 *addr = x; | |
| 300 } | |
| 301 } | |
| 302 UNSAFE_END | |
| 303 | |
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304 #endif // not SPARC and not X86 |
| 0 | 305 |
| 306 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
| 307 \ | |
| 308 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
| 309 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 310 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
| 311 GET_FIELD(obj, offset, jboolean, v); \ | |
| 312 return v; \ | |
| 313 UNSAFE_END \ | |
| 314 \ | |
| 315 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
| 316 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 317 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
| 318 SET_FIELD(obj, offset, jboolean, x); \ | |
| 319 UNSAFE_END \ | |
| 320 \ | |
| 321 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
| 322 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 323 GET_FIELD(obj, offset, jboolean, v); \ | |
| 324 return v; \ | |
| 325 UNSAFE_END \ | |
| 326 \ | |
| 327 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
| 328 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 329 SET_FIELD(obj, offset, jboolean, x); \ | |
| 330 UNSAFE_END \ | |
| 331 \ | |
| 332 // END DEFINE_GETSETOOP. | |
| 333 | |
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334 DEFINE_GETSETOOP(jboolean, Boolean) |
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335 DEFINE_GETSETOOP(jbyte, Byte) |
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336 DEFINE_GETSETOOP(jshort, Short); |
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337 DEFINE_GETSETOOP(jchar, Char); |
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338 DEFINE_GETSETOOP(jint, Int); |
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339 DEFINE_GETSETOOP(jlong, Long); |
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340 DEFINE_GETSETOOP(jfloat, Float); |
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341 DEFINE_GETSETOOP(jdouble, Double); |
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342 |
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343 #undef DEFINE_GETSETOOP |
| 0 | 344 |
| 345 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
| 346 \ | |
| 347 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
| 348 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 349 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
| 350 return v; \ | |
| 351 UNSAFE_END \ | |
| 352 \ | |
| 353 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
| 354 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 355 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
| 356 UNSAFE_END \ | |
| 357 \ | |
| 358 // END DEFINE_GETSETOOP_VOLATILE. | |
| 359 | |
| 360 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
| 361 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
| 362 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
| 363 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
| 364 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
| 365 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
| 366 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
| 367 | |
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368 #if defined(SPARC) || defined(X86) |
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369 // Sparc and X86 have atomic jlong (8 bytes) instructions |
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370 DEFINE_GETSETOOP_VOLATILE(jlong, Long); |
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371 #endif |
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372 |
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373 #undef DEFINE_GETSETOOP_VOLATILE |
| 0 | 374 |
| 375 // The non-intrinsified versions of setOrdered just use setVolatile | |
| 376 | |
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377 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) |
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378 UnsafeWrapper("Unsafe_SetOrderedInt"); |
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379 SET_FIELD_VOLATILE(obj, offset, jint, x); |
| 0 | 380 UNSAFE_END |
| 381 | |
| 382 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 383 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
| 384 oop x = JNIHandles::resolve(x_h); | |
| 385 oop p = JNIHandles::resolve(obj); | |
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386 void* addr = index_oop_from_field_offset_long(p, offset); |
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387 OrderAccess::release(); |
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388 if (UseCompressedOops) { |
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389 oop_store((narrowOop*)addr, x); |
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390 } else { |
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391 oop_store((oop*)addr, x); |
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392 } |
| 0 | 393 OrderAccess::fence(); |
| 394 UNSAFE_END | |
| 395 | |
| 396 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
| 397 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
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398 #if defined(SPARC) || defined(X86) |
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399 // Sparc and X86 have atomic jlong (8 bytes) instructions |
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400 SET_FIELD_VOLATILE(obj, offset, jlong, x); |
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401 #else |
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402 // Keep old code for platforms which may not have atomic long (8 bytes) instructions |
| 0 | 403 { |
| 404 if (VM_Version::supports_cx8()) { | |
| 405 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
| 406 } | |
| 407 else { | |
| 408 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 409 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 410 ObjectLocker ol(p, THREAD); | |
| 411 *addr = x; | |
| 412 } | |
| 413 } | |
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414 #endif |
| 0 | 415 UNSAFE_END |
| 416 | |
| 417 ////// Data in the C heap. | |
| 418 | |
| 419 // Note: These do not throw NullPointerException for bad pointers. | |
| 420 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
| 421 // | |
| 422 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
| 423 \ | |
| 424 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
| 425 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
| 426 void* p = addr_from_java(addr); \ | |
| 427 JavaThread* t = JavaThread::current(); \ | |
| 428 t->set_doing_unsafe_access(true); \ | |
| 429 java_type x = *(volatile native_type*)p; \ | |
| 430 t->set_doing_unsafe_access(false); \ | |
| 431 return x; \ | |
| 432 UNSAFE_END \ | |
| 433 \ | |
| 434 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
| 435 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
| 436 JavaThread* t = JavaThread::current(); \ | |
| 437 t->set_doing_unsafe_access(true); \ | |
| 438 void* p = addr_from_java(addr); \ | |
| 439 *(volatile native_type*)p = x; \ | |
| 440 t->set_doing_unsafe_access(false); \ | |
| 441 UNSAFE_END \ | |
| 442 \ | |
| 443 // END DEFINE_GETSETNATIVE. | |
| 444 | |
| 445 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
| 446 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
| 447 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
| 448 DEFINE_GETSETNATIVE(jint, Int, jint); | |
| 449 // no long -- handled specially | |
| 450 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
| 451 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
| 452 | |
| 453 #undef DEFINE_GETSETNATIVE | |
| 454 | |
| 455 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 456 UnsafeWrapper("Unsafe_GetNativeLong"); | |
| 457 JavaThread* t = JavaThread::current(); | |
| 458 // We do it this way to avoid problems with access to heap using 64 | |
| 459 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
| 460 // some CPUs (SPARC) it leads to SIGBUS. | |
| 461 t->set_doing_unsafe_access(true); | |
| 462 void* p = addr_from_java(addr); | |
| 463 jlong x; | |
| 464 if (((intptr_t)p & 7) == 0) { | |
| 465 // jlong is aligned, do a volatile access | |
| 466 x = *(volatile jlong*)p; | |
| 467 } else { | |
| 468 jlong_accessor acc; | |
| 469 acc.words[0] = ((volatile jint*)p)[0]; | |
| 470 acc.words[1] = ((volatile jint*)p)[1]; | |
| 471 x = acc.long_value; | |
| 472 } | |
| 473 t->set_doing_unsafe_access(false); | |
| 474 return x; | |
| 475 UNSAFE_END | |
| 476 | |
| 477 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
| 478 UnsafeWrapper("Unsafe_SetNativeLong"); | |
| 479 JavaThread* t = JavaThread::current(); | |
| 480 // see comment for Unsafe_GetNativeLong | |
| 481 t->set_doing_unsafe_access(true); | |
| 482 void* p = addr_from_java(addr); | |
| 483 if (((intptr_t)p & 7) == 0) { | |
| 484 // jlong is aligned, do a volatile access | |
| 485 *(volatile jlong*)p = x; | |
| 486 } else { | |
| 487 jlong_accessor acc; | |
| 488 acc.long_value = x; | |
| 489 ((volatile jint*)p)[0] = acc.words[0]; | |
| 490 ((volatile jint*)p)[1] = acc.words[1]; | |
| 491 } | |
| 492 t->set_doing_unsafe_access(false); | |
| 493 UNSAFE_END | |
| 494 | |
| 495 | |
| 496 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 497 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
| 498 void* p = addr_from_java(addr); | |
| 499 return addr_to_java(*(void**)p); | |
| 500 UNSAFE_END | |
| 501 | |
| 502 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
| 503 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
| 504 void* p = addr_from_java(addr); | |
| 505 *(void**)p = addr_from_java(x); | |
| 506 UNSAFE_END | |
| 507 | |
| 508 | |
| 509 ////// Allocation requests | |
| 510 | |
| 511 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
| 512 UnsafeWrapper("Unsafe_AllocateInstance"); | |
| 513 { | |
| 514 ThreadToNativeFromVM ttnfv(thread); | |
| 515 return env->AllocObject(cls); | |
| 516 } | |
| 517 UNSAFE_END | |
| 518 | |
| 519 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
| 520 UnsafeWrapper("Unsafe_AllocateMemory"); | |
| 521 size_t sz = (size_t)size; | |
| 522 if (sz != (julong)size || size < 0) { | |
| 523 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 524 } | |
| 525 if (sz == 0) { | |
| 526 return 0; | |
| 527 } | |
| 528 sz = round_to(sz, HeapWordSize); | |
| 529 void* x = os::malloc(sz); | |
| 530 if (x == NULL) { | |
| 531 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
| 532 } | |
| 533 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
| 534 return addr_to_java(x); | |
| 535 UNSAFE_END | |
| 536 | |
| 537 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
| 538 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
| 539 void* p = addr_from_java(addr); | |
| 540 size_t sz = (size_t)size; | |
| 541 if (sz != (julong)size || size < 0) { | |
| 542 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 543 } | |
| 544 if (sz == 0) { | |
| 545 os::free(p); | |
| 546 return 0; | |
| 547 } | |
| 548 sz = round_to(sz, HeapWordSize); | |
| 549 void* x = (p == NULL) ? os::malloc(sz) : os::realloc(p, sz); | |
| 550 if (x == NULL) { | |
| 551 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
| 552 } | |
| 553 return addr_to_java(x); | |
| 554 UNSAFE_END | |
| 555 | |
| 556 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 557 UnsafeWrapper("Unsafe_FreeMemory"); | |
| 558 void* p = addr_from_java(addr); | |
| 559 if (p == NULL) { | |
| 560 return; | |
| 561 } | |
| 562 os::free(p); | |
| 563 UNSAFE_END | |
| 564 | |
| 565 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
| 566 UnsafeWrapper("Unsafe_SetMemory"); | |
| 567 size_t sz = (size_t)size; | |
| 568 if (sz != (julong)size || size < 0) { | |
| 569 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 570 } | |
| 571 char* p = (char*) addr_from_java(addr); | |
| 572 Copy::fill_to_memory_atomic(p, sz, value); | |
| 573 UNSAFE_END | |
| 574 | |
| 575 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
| 576 UnsafeWrapper("Unsafe_SetMemory"); | |
| 577 size_t sz = (size_t)size; | |
| 578 if (sz != (julong)size || size < 0) { | |
| 579 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 580 } | |
| 581 oop base = JNIHandles::resolve(obj); | |
| 582 void* p = index_oop_from_field_offset_long(base, offset); | |
| 583 Copy::fill_to_memory_atomic(p, sz, value); | |
| 584 UNSAFE_END | |
| 585 | |
| 586 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
| 587 UnsafeWrapper("Unsafe_CopyMemory"); | |
| 588 if (size == 0) { | |
| 589 return; | |
| 590 } | |
| 591 size_t sz = (size_t)size; | |
| 592 if (sz != (julong)size || size < 0) { | |
| 593 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 594 } | |
| 595 void* src = addr_from_java(srcAddr); | |
| 596 void* dst = addr_from_java(dstAddr); | |
| 597 Copy::conjoint_memory_atomic(src, dst, sz); | |
| 598 UNSAFE_END | |
| 599 | |
| 600 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
| 601 UnsafeWrapper("Unsafe_CopyMemory"); | |
| 602 if (size == 0) { | |
| 603 return; | |
| 604 } | |
| 605 size_t sz = (size_t)size; | |
| 606 if (sz != (julong)size || size < 0) { | |
| 607 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 608 } | |
| 609 oop srcp = JNIHandles::resolve(srcObj); | |
| 610 oop dstp = JNIHandles::resolve(dstObj); | |
| 611 if (dstp != NULL && !dstp->is_typeArray()) { | |
| 612 // NYI: This works only for non-oop arrays at present. | |
| 613 // Generalizing it would be reasonable, but requires card marking. | |
| 614 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
| 615 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 616 } | |
| 617 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
| 618 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
| 619 Copy::conjoint_memory_atomic(src, dst, sz); | |
| 620 UNSAFE_END | |
| 621 | |
| 622 | |
| 623 ////// Random queries | |
| 624 | |
| 625 // See comment at file start about UNSAFE_LEAF | |
| 626 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
| 627 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
| 628 UnsafeWrapper("Unsafe_AddressSize"); | |
| 629 return sizeof(void*); | |
| 630 UNSAFE_END | |
| 631 | |
| 632 // See comment at file start about UNSAFE_LEAF | |
| 633 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
| 634 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
| 635 UnsafeWrapper("Unsafe_PageSize"); | |
| 636 return os::vm_page_size(); | |
| 637 UNSAFE_END | |
| 638 | |
| 639 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
| 640 if (field == NULL) { | |
| 641 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 642 } | |
| 643 | |
| 644 oop reflected = JNIHandles::resolve_non_null(field); | |
| 645 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
| 646 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 647 int slot = java_lang_reflect_Field::slot(reflected); | |
| 648 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
| 649 | |
| 650 if (must_be_static >= 0) { | |
| 651 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
| 652 if (must_be_static != really_is_static) { | |
| 653 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 654 } | |
| 655 } | |
| 656 | |
| 657 int offset = instanceKlass::cast(k)->offset_from_fields(slot); | |
| 658 return field_offset_from_byte_offset(offset); | |
| 659 } | |
| 660 | |
| 661 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 662 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
| 663 return find_field_offset(field, 0, THREAD); | |
| 664 UNSAFE_END | |
| 665 | |
| 666 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 667 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
| 668 return find_field_offset(field, 1, THREAD); | |
| 669 UNSAFE_END | |
| 670 | |
| 671 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
| 672 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
| 673 // Note: In this VM implementation, a field address is always a short | |
| 674 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
| 675 // range of the return type is never used. However, some implementations | |
| 676 // might put the static field inside an array shared by many classes, | |
| 677 // or even at a fixed address, in which case the address could be quite | |
| 678 // large. In that last case, this function would return NULL, since | |
| 679 // the address would operate alone, without any base pointer. | |
| 680 | |
| 681 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 682 | |
| 683 oop reflected = JNIHandles::resolve_non_null(field); | |
| 684 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
| 685 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
| 686 | |
| 687 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
| 688 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 689 } | |
| 690 | |
|
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691 return JNIHandles::make_local(env, mirror); |
| 0 | 692 UNSAFE_END |
| 693 | |
| 694 //@deprecated | |
| 695 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 696 UnsafeWrapper("Unsafe_FieldOffset"); | |
| 697 // tries (but fails) to be polymorphic between static and non-static: | |
| 698 jlong offset = find_field_offset(field, -1, THREAD); | |
| 699 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
| 700 return (jint)offset; | |
| 701 UNSAFE_END | |
| 702 | |
| 703 //@deprecated | |
| 704 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
| 705 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
| 706 if (clazz == NULL) { | |
| 707 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 708 } | |
|
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709 return JNIHandles::make_local(env, JNIHandles::resolve_non_null(clazz)); |
| 0 | 710 UNSAFE_END |
| 711 | |
| 712 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) | |
| 713 UnsafeWrapper("Unsafe_EnsureClassInitialized"); | |
| 714 if (clazz == NULL) { | |
| 715 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 716 } | |
| 717 oop mirror = JNIHandles::resolve_non_null(clazz); | |
| 718 instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(mirror)); | |
| 719 if (k != NULL) { | |
| 720 k->initialize(CHECK); | |
| 721 } | |
| 722 UNSAFE_END | |
| 723 | |
| 724 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
| 725 if (acls == NULL) { | |
| 726 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 727 } | |
| 728 oop mirror = JNIHandles::resolve_non_null(acls); | |
| 729 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 730 if (k == NULL || !k->klass_part()->oop_is_array()) { | |
| 731 THROW(vmSymbols::java_lang_InvalidClassException()); | |
| 732 } else if (k->klass_part()->oop_is_objArray()) { | |
| 733 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); | |
|
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734 scale = heapOopSize; |
| 0 | 735 } else if (k->klass_part()->oop_is_typeArray()) { |
| 736 typeArrayKlass* tak = typeArrayKlass::cast(k); | |
| 737 base = tak->array_header_in_bytes(); | |
| 738 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
| 739 scale = (1 << tak->log2_element_size()); | |
| 740 } else { | |
| 741 ShouldNotReachHere(); | |
| 742 } | |
| 743 } | |
| 744 | |
| 745 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
| 746 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
| 747 int base, scale; | |
| 748 getBaseAndScale(base, scale, acls, CHECK_0); | |
| 749 return field_offset_from_byte_offset(base); | |
| 750 UNSAFE_END | |
| 751 | |
| 752 | |
| 753 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
| 754 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
| 755 int base, scale; | |
| 756 getBaseAndScale(base, scale, acls, CHECK_0); | |
| 757 // This VM packs both fields and array elements down to the byte. | |
| 758 // But watch out: If this changes, so that array references for | |
| 759 // a given primitive type (say, T_BOOLEAN) use different memory units | |
| 760 // than fields, this method MUST return zero for such arrays. | |
| 761 // For example, the VM used to store sub-word sized fields in full | |
| 762 // words in the object layout, so that accessors like getByte(Object,int) | |
| 763 // did not really do what one might expect for arrays. Therefore, | |
| 764 // this function used to report a zero scale factor, so that the user | |
| 765 // would know not to attempt to access sub-word array elements. | |
| 766 // // Code for unpacked fields: | |
| 767 // if (scale < wordSize) return 0; | |
| 768 | |
| 769 // The following allows for a pretty general fieldOffset cookie scheme, | |
| 770 // but requires it to be linear in byte offset. | |
| 771 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
| 772 UNSAFE_END | |
| 773 | |
| 774 | |
| 775 static inline void throw_new(JNIEnv *env, const char *ename) { | |
| 776 char buf[100]; | |
| 777 strcpy(buf, "java/lang/"); | |
| 778 strcat(buf, ename); | |
| 779 jclass cls = env->FindClass(buf); | |
| 780 char* msg = NULL; | |
| 781 env->ThrowNew(cls, msg); | |
| 782 } | |
| 783 | |
| 784 static jclass Unsafe_DefineClass(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { | |
| 785 { | |
| 786 // Code lifted from JDK 1.3 ClassLoader.c | |
| 787 | |
| 788 jbyte *body; | |
| 789 char *utfName; | |
| 790 jclass result = 0; | |
| 791 char buf[128]; | |
| 792 | |
| 793 if (UsePerfData) { | |
| 794 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
| 795 } | |
| 796 | |
| 797 if (data == NULL) { | |
| 798 throw_new(env, "NullPointerException"); | |
| 799 return 0; | |
| 800 } | |
| 801 | |
| 802 /* Work around 4153825. malloc crashes on Solaris when passed a | |
| 803 * negative size. | |
| 804 */ | |
| 805 if (length < 0) { | |
| 806 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
| 807 return 0; | |
| 808 } | |
| 809 | |
| 810 body = NEW_C_HEAP_ARRAY(jbyte, length); | |
| 811 | |
| 812 if (body == 0) { | |
| 813 throw_new(env, "OutOfMemoryError"); | |
| 814 return 0; | |
| 815 } | |
| 816 | |
| 817 env->GetByteArrayRegion(data, offset, length, body); | |
| 818 | |
| 819 if (env->ExceptionOccurred()) | |
| 820 goto free_body; | |
| 821 | |
| 822 if (name != NULL) { | |
| 823 uint len = env->GetStringUTFLength(name); | |
| 824 int unicode_len = env->GetStringLength(name); | |
| 825 if (len >= sizeof(buf)) { | |
| 826 utfName = NEW_C_HEAP_ARRAY(char, len + 1); | |
| 827 if (utfName == NULL) { | |
| 828 throw_new(env, "OutOfMemoryError"); | |
| 829 goto free_body; | |
| 830 } | |
| 831 } else { | |
| 832 utfName = buf; | |
| 833 } | |
| 834 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
| 835 //VerifyFixClassname(utfName); | |
| 836 for (uint i = 0; i < len; i++) { | |
| 837 if (utfName[i] == '.') utfName[i] = '/'; | |
| 838 } | |
| 839 } else { | |
| 840 utfName = NULL; | |
| 841 } | |
| 842 | |
| 843 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
| 844 | |
| 845 if (utfName && utfName != buf) | |
| 846 FREE_C_HEAP_ARRAY(char, utfName); | |
| 847 | |
| 848 free_body: | |
| 849 FREE_C_HEAP_ARRAY(jbyte, body); | |
| 850 return result; | |
| 851 } | |
| 852 } | |
| 853 | |
| 854 | |
| 855 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) | |
| 856 UnsafeWrapper("Unsafe_DefineClass"); | |
| 857 { | |
| 858 ThreadToNativeFromVM ttnfv(thread); | |
| 859 | |
| 860 int depthFromDefineClass0 = 1; | |
| 861 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
| 862 jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller); | |
| 863 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); | |
| 864 | |
| 865 return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); | |
| 866 } | |
| 867 UNSAFE_END | |
| 868 | |
| 869 | |
| 870 UNSAFE_ENTRY(jclass, Unsafe_DefineClass1(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd)) | |
| 871 UnsafeWrapper("Unsafe_DefineClass"); | |
| 872 { | |
| 873 ThreadToNativeFromVM ttnfv(thread); | |
| 874 | |
| 875 return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); | |
| 876 } | |
| 877 UNSAFE_END | |
| 878 | |
|
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879 #define DAC_Args CLS"[B["OBJ |
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880 // define a class but do not make it known to the class loader or system dictionary |
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881 // - host_class: supplies context for linkage, access control, protection domain, and class loader |
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882 // - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
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883 // - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
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884 |
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885 // When you load an anonymous class U, it works as if you changed its name just before loading, |
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886 // to a name that you will never use again. Since the name is lost, no other class can directly |
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887 // link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
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888 // through java.lang.Class methods like Class.newInstance. |
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889 |
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890 // Access checks for linkage sites within U continue to follow the same rules as for named classes. |
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891 // The package of an anonymous class is given by the package qualifier on the name under which it was loaded. |
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892 // An anonymous class also has special privileges to access any member of its host class. |
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893 // This is the main reason why this loading operation is unsafe. The purpose of this is to |
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894 // allow language implementations to simulate "open classes"; a host class in effect gets |
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895 // new code when an anonymous class is loaded alongside it. A less convenient but more |
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896 // standard way to do this is with reflection, which can also be set to ignore access |
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897 // restrictions. |
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898 |
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899 // Access into an anonymous class is possible only through reflection. Therefore, there |
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900 // are no special access rules for calling into an anonymous class. The relaxed access |
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901 // rule for the host class is applied in the opposite direction: A host class reflectively |
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902 // access one of its anonymous classes. |
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903 |
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904 // If you load the same bytecodes twice, you get two different classes. You can reload |
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905 // the same bytecodes with or without varying CP patches. |
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906 |
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907 // By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
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908 // The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
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909 // The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
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910 |
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911 // This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
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912 // an outer class (so that U2 is an anonymous inner class of anonymous U1). |
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913 // It is not possible for a named class, or an older anonymous class, to refer by |
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914 // name (via its CP) to a newer anonymous class. |
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915 |
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916 // CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
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917 // or type descriptors used in the loaded anonymous class. |
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918 |
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919 // Finally, CP patching may be used to introduce "live" objects into the constant pool, |
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920 // instead of "dead" strings. A compiled statement like println((Object)"hello") can |
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921 // be changed to println(greeting), where greeting is an arbitrary object created before |
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922 // the anonymous class is loaded. This is useful in dynamic languages, in which |
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923 // various kinds of metaobjects must be introduced as constants into bytecode. |
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924 // Note the cast (Object), which tells the verifier to expect an arbitrary object, |
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925 // not just a literal string. For such ldc instructions, the verifier uses the |
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926 // type Object instead of String, if the loaded constant is not in fact a String. |
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927 |
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928 static oop |
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929 Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
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930 jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
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931 HeapWord* *temp_alloc, |
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932 TRAPS) { |
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933 |
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934 if (UsePerfData) { |
|
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935 ClassLoader::unsafe_defineClassCallCounter()->inc(); |
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|
936 } |
|
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|
937 |
|
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938 if (data == NULL) { |
|
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939 THROW_0(vmSymbols::java_lang_NullPointerException()); |
|
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940 } |
|
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|
941 |
|
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942 jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
|
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943 jint word_length = (length + sizeof(HeapWord)-1) / sizeof(HeapWord); |
|
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944 HeapWord* body = NEW_C_HEAP_ARRAY(HeapWord, word_length); |
|
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945 if (body == NULL) { |
|
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946 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
|
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947 } |
|
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948 |
|
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949 // caller responsible to free it: |
|
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950 (*temp_alloc) = body; |
|
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951 |
|
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952 { |
|
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953 jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
|
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954 Copy::conjoint_words((HeapWord*) array_base, body, word_length); |
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955 } |
|
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956 |
|
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957 u1* class_bytes = (u1*) body; |
|
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958 int class_bytes_length = (int) length; |
|
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959 if (class_bytes_length < 0) class_bytes_length = 0; |
|
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960 if (class_bytes == NULL |
|
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961 || host_class == NULL |
|
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962 || length != class_bytes_length) |
|
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963 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
|
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964 |
|
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965 objArrayHandle cp_patches_h; |
|
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966 if (cp_patches_jh != NULL) { |
|
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967 oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
|
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968 if (!p->is_objArray()) |
|
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969 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
|
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970 cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
|
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971 } |
|
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|
972 |
|
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973 KlassHandle host_klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(host_class))); |
|
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974 const char* host_source = host_klass->external_name(); |
|
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975 Handle host_loader(THREAD, host_klass->class_loader()); |
|
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976 Handle host_domain(THREAD, host_klass->protection_domain()); |
|
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977 |
|
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978 GrowableArray<Handle>* cp_patches = NULL; |
|
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979 if (cp_patches_h.not_null()) { |
|
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980 int alen = cp_patches_h->length(); |
|
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981 for (int i = alen-1; i >= 0; i--) { |
|
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982 oop p = cp_patches_h->obj_at(i); |
|
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983 if (p != NULL) { |
|
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984 Handle patch(THREAD, p); |
|
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985 if (cp_patches == NULL) |
|
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986 cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
|
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987 cp_patches->at_put(i, patch); |
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988 } |
|
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989 } |
|
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990 } |
|
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991 |
|
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992 ClassFileStream st(class_bytes, class_bytes_length, (char*) host_source); |
|
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993 |
|
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994 instanceKlassHandle anon_klass; |
|
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995 { |
|
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996 Symbol* no_class_name = NULL; |
|
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997 klassOop anonk = SystemDictionary::parse_stream(no_class_name, |
|
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998 host_loader, host_domain, |
|
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999 &st, host_klass, cp_patches, |
|
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1000 CHECK_NULL); |
|
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1001 if (anonk == NULL) return NULL; |
|
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1002 anon_klass = instanceKlassHandle(THREAD, anonk); |
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1003 } |
|
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|
1004 |
|
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|
1005 // let caller initialize it as needed... |
|
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1006 |
|
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1007 return anon_klass->java_mirror(); |
|
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1008 } |
|
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1009 |
|
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1010 UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) |
|
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1011 { |
|
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1012 UnsafeWrapper("Unsafe_DefineAnonymousClass"); |
|
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1013 ResourceMark rm(THREAD); |
|
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1014 |
|
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1015 HeapWord* temp_alloc = NULL; |
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|
1016 |
|
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1017 jobject res_jh = NULL; |
|
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1018 |
|
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1019 { oop res_oop = Unsafe_DefineAnonymousClass_impl(env, |
|
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1020 host_class, data, cp_patches_jh, |
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1021 &temp_alloc, THREAD); |
|
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1022 if (res_oop != NULL) |
|
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1023 res_jh = JNIHandles::make_local(env, res_oop); |
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1024 } |
|
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1025 |
|
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1026 // try/finally clause: |
|
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1027 if (temp_alloc != NULL) { |
|
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1028 FREE_C_HEAP_ARRAY(HeapWord, temp_alloc); |
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1029 } |
|
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1030 |
|
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1031 return (jclass) res_jh; |
|
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1032 } |
|
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1033 UNSAFE_END |
|
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1034 |
|
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1035 |
| 0 | 1036 |
| 1037 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1038 UnsafeWrapper("Unsafe_MonitorEnter"); | |
| 1039 { | |
| 1040 if (jobj == NULL) { | |
| 1041 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1042 } | |
| 1043 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
| 1044 ObjectSynchronizer::jni_enter(obj, CHECK); | |
| 1045 } | |
| 1046 UNSAFE_END | |
| 1047 | |
| 1048 | |
| 1049 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1050 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
| 1051 { | |
| 1052 if (jobj == NULL) { | |
| 1053 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
| 1054 } | |
| 1055 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
| 1056 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
| 1057 return (res ? JNI_TRUE : JNI_FALSE); | |
| 1058 } | |
| 1059 UNSAFE_END | |
| 1060 | |
| 1061 | |
| 1062 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1063 UnsafeWrapper("Unsafe_MonitorExit"); | |
| 1064 { | |
| 1065 if (jobj == NULL) { | |
| 1066 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1067 } | |
| 1068 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
| 1069 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
| 1070 } | |
| 1071 UNSAFE_END | |
| 1072 | |
| 1073 | |
| 1074 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
| 1075 UnsafeWrapper("Unsafe_ThrowException"); | |
| 1076 { | |
| 1077 ThreadToNativeFromVM ttnfv(thread); | |
| 1078 env->Throw(thr); | |
| 1079 } | |
| 1080 UNSAFE_END | |
| 1081 | |
| 1082 // JSR166 ------------------------------------------------------------------ | |
| 1083 | |
| 1084 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
| 1085 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
| 1086 oop x = JNIHandles::resolve(x_h); | |
| 1087 oop e = JNIHandles::resolve(e_h); | |
| 1088 oop p = JNIHandles::resolve(obj); | |
|
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1089 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
|
845
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1090 if (UseCompressedOops) { |
|
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1091 update_barrier_set_pre((narrowOop*)addr, e); |
|
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1092 } else { |
|
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1093 update_barrier_set_pre((oop*)addr, e); |
|
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1094 } |
|
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1095 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e); |
|
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1096 jboolean success = (res == e); |
| 0 | 1097 if (success) |
|
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1098 update_barrier_set((void*)addr, x); |
| 0 | 1099 return success; |
| 1100 UNSAFE_END | |
| 1101 | |
| 1102 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
| 1103 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
| 1104 oop p = JNIHandles::resolve(obj); | |
| 1105 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
| 1106 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
| 1107 UNSAFE_END | |
| 1108 | |
| 1109 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
| 1110 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
| 1111 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 1112 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 1113 if (VM_Version::supports_cx8()) | |
| 1114 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
| 1115 else { | |
| 1116 jboolean success = false; | |
| 1117 ObjectLocker ol(p, THREAD); | |
| 1118 if (*addr == e) { *addr = x; success = true; } | |
| 1119 return success; | |
| 1120 } | |
| 1121 UNSAFE_END | |
| 1122 | |
| 1123 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
| 1124 UnsafeWrapper("Unsafe_Park"); | |
|
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1125 HS_DTRACE_PROBE3(hotspot, thread__park__begin, thread->parker(), (int) isAbsolute, time); |
| 0 | 1126 JavaThreadParkedState jtps(thread, time != 0); |
| 1127 thread->parker()->park(isAbsolute != 0, time); | |
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1128 HS_DTRACE_PROBE1(hotspot, thread__park__end, thread->parker()); |
| 0 | 1129 UNSAFE_END |
| 1130 | |
| 1131 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
| 1132 UnsafeWrapper("Unsafe_Unpark"); | |
| 1133 Parker* p = NULL; | |
| 1134 if (jthread != NULL) { | |
| 1135 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
| 1136 if (java_thread != NULL) { | |
| 1137 jlong lp = java_lang_Thread::park_event(java_thread); | |
| 1138 if (lp != 0) { | |
| 1139 // This cast is OK even though the jlong might have been read | |
| 1140 // non-atomically on 32bit systems, since there, one word will | |
| 1141 // always be zero anyway and the value set is always the same | |
| 1142 p = (Parker*)addr_from_java(lp); | |
| 1143 } else { | |
| 1144 // Grab lock if apparently null or using older version of library | |
| 1145 MutexLocker mu(Threads_lock); | |
| 1146 java_thread = JNIHandles::resolve_non_null(jthread); | |
| 1147 if (java_thread != NULL) { | |
| 1148 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
| 1149 if (thr != NULL) { | |
| 1150 p = thr->parker(); | |
| 1151 if (p != NULL) { // Bind to Java thread for next time. | |
| 1152 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
| 1153 } | |
| 1154 } | |
| 1155 } | |
| 1156 } | |
| 1157 } | |
| 1158 } | |
| 1159 if (p != NULL) { | |
|
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1160 HS_DTRACE_PROBE1(hotspot, thread__unpark, p); |
| 0 | 1161 p->unpark(); |
| 1162 } | |
| 1163 UNSAFE_END | |
| 1164 | |
| 1165 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
| 1166 UnsafeWrapper("Unsafe_Loadavg"); | |
| 1167 const int max_nelem = 3; | |
| 1168 double la[max_nelem]; | |
| 1169 jint ret; | |
| 1170 | |
| 1171 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
| 1172 assert(a->is_typeArray(), "must be type array"); | |
| 1173 | |
| 1174 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
| 1175 ThreadToNativeFromVM ttnfv(thread); | |
| 1176 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
| 1177 return -1; | |
| 1178 } | |
| 1179 | |
| 1180 ret = os::loadavg(la, nelem); | |
| 1181 if (ret == -1) return -1; | |
| 1182 | |
| 1183 // if successful, ret is the number of samples actually retrieved. | |
| 1184 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
| 1185 switch(ret) { | |
| 1186 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
| 1187 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
| 1188 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
| 1189 } | |
| 1190 return ret; | |
| 1191 UNSAFE_END | |
| 1192 | |
| 1193 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
| 1194 UnsafeWrapper("Unsafe_PrefetchRead"); | |
| 1195 oop p = JNIHandles::resolve(obj); | |
| 1196 void* addr = index_oop_from_field_offset_long(p, 0); | |
| 1197 Prefetch::read(addr, (intx)offset); | |
| 1198 UNSAFE_END | |
| 1199 | |
| 1200 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
| 1201 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
| 1202 oop p = JNIHandles::resolve(obj); | |
| 1203 void* addr = index_oop_from_field_offset_long(p, 0); | |
| 1204 Prefetch::write(addr, (intx)offset); | |
| 1205 UNSAFE_END | |
| 1206 | |
| 1207 | |
| 1208 /// JVM_RegisterUnsafeMethods | |
| 1209 | |
| 1210 #define ADR "J" | |
| 1211 | |
| 1212 #define LANG "Ljava/lang/" | |
| 1213 | |
| 1214 #define OBJ LANG"Object;" | |
| 1215 #define CLS LANG"Class;" | |
| 1216 #define CTR LANG"reflect/Constructor;" | |
| 1217 #define FLD LANG"reflect/Field;" | |
| 1218 #define MTH LANG"reflect/Method;" | |
| 1219 #define THR LANG"Throwable;" | |
| 1220 | |
| 1221 #define DC0_Args LANG"String;[BII" | |
| 1222 #define DC1_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" | |
| 1223 | |
| 1224 #define CC (char*) /*cast a literal from (const char*)*/ | |
| 1225 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
| 1226 | |
| 1227 // define deprecated accessors for compabitility with 1.4.0 | |
| 1228 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
| 1229 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
| 1230 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
| 1231 | |
| 1232 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
| 1233 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
| 1234 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
| 1235 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
| 1236 | |
| 1237 // Note: In 1.5.0, there are volatile versions too | |
| 1238 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
| 1239 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
| 1240 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
| 1241 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
| 1242 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
| 1243 | |
| 1244 | |
| 1245 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
| 1246 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
| 1247 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
| 1248 | |
| 1249 | |
| 1250 | |
| 1251 // %%% These are temporarily supported until the SDK sources | |
| 1252 // contain the necessarily updated Unsafe.java. | |
| 1253 static JNINativeMethod methods_140[] = { | |
| 1254 | |
| 1255 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
| 1256 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
| 1257 | |
| 1258 DECLARE_GETSETOOP_140(Boolean, Z), | |
| 1259 DECLARE_GETSETOOP_140(Byte, B), | |
| 1260 DECLARE_GETSETOOP_140(Short, S), | |
| 1261 DECLARE_GETSETOOP_140(Char, C), | |
| 1262 DECLARE_GETSETOOP_140(Int, I), | |
| 1263 DECLARE_GETSETOOP_140(Long, J), | |
| 1264 DECLARE_GETSETOOP_140(Float, F), | |
| 1265 DECLARE_GETSETOOP_140(Double, D), | |
| 1266 | |
| 1267 DECLARE_GETSETNATIVE(Byte, B), | |
| 1268 DECLARE_GETSETNATIVE(Short, S), | |
| 1269 DECLARE_GETSETNATIVE(Char, C), | |
| 1270 DECLARE_GETSETNATIVE(Int, I), | |
| 1271 DECLARE_GETSETNATIVE(Long, J), | |
| 1272 DECLARE_GETSETNATIVE(Float, F), | |
| 1273 DECLARE_GETSETNATIVE(Double, D), | |
| 1274 | |
| 1275 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1276 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1277 | |
| 1278 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1279 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1280 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
| 1281 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
| 1282 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1283 | |
| 1284 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, //deprecated | |
| 1285 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, //deprecated | |
| 1286 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1287 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1288 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1289 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1290 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1291 | |
| 1292 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
| 1293 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
| 1294 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
| 1295 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1296 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1297 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
| 1298 }; | |
| 1299 | |
| 1300 // These are the old methods prior to the JSR 166 changes in 1.5.0 | |
| 1301 static JNINativeMethod methods_141[] = { | |
| 1302 | |
| 1303 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
| 1304 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1305 | |
| 1306 DECLARE_GETSETOOP_141(Boolean, Z), | |
| 1307 DECLARE_GETSETOOP_141(Byte, B), | |
| 1308 DECLARE_GETSETOOP_141(Short, S), | |
| 1309 DECLARE_GETSETOOP_141(Char, C), | |
| 1310 DECLARE_GETSETOOP_141(Int, I), | |
| 1311 DECLARE_GETSETOOP_141(Long, J), | |
| 1312 DECLARE_GETSETOOP_141(Float, F), | |
| 1313 DECLARE_GETSETOOP_141(Double, D), | |
| 1314 | |
| 1315 DECLARE_GETSETNATIVE(Byte, B), | |
| 1316 DECLARE_GETSETNATIVE(Short, S), | |
| 1317 DECLARE_GETSETNATIVE(Char, C), | |
| 1318 DECLARE_GETSETNATIVE(Int, I), | |
| 1319 DECLARE_GETSETNATIVE(Long, J), | |
| 1320 DECLARE_GETSETNATIVE(Float, F), | |
| 1321 DECLARE_GETSETNATIVE(Double, D), | |
| 1322 | |
| 1323 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1324 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1325 | |
| 1326 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1327 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1328 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
| 1329 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
| 1330 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1331 | |
| 1332 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1333 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1334 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1335 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1336 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1337 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1338 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1339 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1340 | |
| 1341 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
| 1342 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
| 1343 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
| 1344 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1345 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1346 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
| 1347 | |
| 1348 }; | |
| 1349 | |
| 1350 // These are the old methods prior to the JSR 166 changes in 1.6.0 | |
| 1351 static JNINativeMethod methods_15[] = { | |
| 1352 | |
| 1353 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
| 1354 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1355 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
| 1356 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
| 1357 | |
| 1358 | |
| 1359 DECLARE_GETSETOOP(Boolean, Z), | |
| 1360 DECLARE_GETSETOOP(Byte, B), | |
| 1361 DECLARE_GETSETOOP(Short, S), | |
| 1362 DECLARE_GETSETOOP(Char, C), | |
| 1363 DECLARE_GETSETOOP(Int, I), | |
| 1364 DECLARE_GETSETOOP(Long, J), | |
| 1365 DECLARE_GETSETOOP(Float, F), | |
| 1366 DECLARE_GETSETOOP(Double, D), | |
| 1367 | |
| 1368 DECLARE_GETSETNATIVE(Byte, B), | |
| 1369 DECLARE_GETSETNATIVE(Short, S), | |
| 1370 DECLARE_GETSETNATIVE(Char, C), | |
| 1371 DECLARE_GETSETNATIVE(Int, I), | |
| 1372 DECLARE_GETSETNATIVE(Long, J), | |
| 1373 DECLARE_GETSETNATIVE(Float, F), | |
| 1374 DECLARE_GETSETNATIVE(Double, D), | |
| 1375 | |
| 1376 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1377 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1378 | |
| 1379 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1380 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1381 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
| 1382 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
| 1383 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1384 | |
| 1385 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1386 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1387 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1388 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1389 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1390 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1391 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1392 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1393 | |
| 1394 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
| 1395 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
| 1396 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
| 1397 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1398 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1399 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
| 1400 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
| 1401 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
| 1402 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
| 1403 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
| 1404 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
| 1405 | |
| 1406 }; | |
| 1407 | |
| 1408 // These are the correct methods, moving forward: | |
| 1409 static JNINativeMethod methods[] = { | |
| 1410 | |
| 1411 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
| 1412 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1413 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
| 1414 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
| 1415 | |
| 1416 | |
| 1417 DECLARE_GETSETOOP(Boolean, Z), | |
| 1418 DECLARE_GETSETOOP(Byte, B), | |
| 1419 DECLARE_GETSETOOP(Short, S), | |
| 1420 DECLARE_GETSETOOP(Char, C), | |
| 1421 DECLARE_GETSETOOP(Int, I), | |
| 1422 DECLARE_GETSETOOP(Long, J), | |
| 1423 DECLARE_GETSETOOP(Float, F), | |
| 1424 DECLARE_GETSETOOP(Double, D), | |
| 1425 | |
| 1426 DECLARE_GETSETNATIVE(Byte, B), | |
| 1427 DECLARE_GETSETNATIVE(Short, S), | |
| 1428 DECLARE_GETSETNATIVE(Char, C), | |
| 1429 DECLARE_GETSETNATIVE(Int, I), | |
| 1430 DECLARE_GETSETNATIVE(Long, J), | |
| 1431 DECLARE_GETSETNATIVE(Float, F), | |
| 1432 DECLARE_GETSETNATIVE(Double, D), | |
| 1433 | |
| 1434 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1435 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1436 | |
| 1437 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1438 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1439 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
| 1440 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
| 1441 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1442 | |
| 1443 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1444 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1445 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1446 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1447 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1448 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1449 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1450 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1451 | |
| 1452 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
| 1453 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
| 1454 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
| 1455 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1456 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1457 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
| 1458 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
| 1459 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
| 1460 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
| 1461 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
| 1462 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
| 1463 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
| 1464 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
| 1465 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
| 1466 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
| 1467 | |
| 1468 // {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)}, | |
| 1469 | |
| 1470 // {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
| 1471 // {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
| 1472 // {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
| 1473 // {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
| 1474 | |
| 1475 }; | |
| 1476 | |
| 1477 JNINativeMethod loadavg_method[] = { | |
| 1478 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} | |
| 1479 }; | |
| 1480 | |
| 1481 JNINativeMethod prefetch_methods[] = { | |
| 1482 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
| 1483 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
| 1484 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
| 1485 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
| 1486 }; | |
| 1487 | |
| 1488 JNINativeMethod memcopy_methods[] = { | |
| 1489 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, | |
| 1490 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
| 1491 }; | |
| 1492 | |
| 1493 JNINativeMethod memcopy_methods_15[] = { | |
| 1494 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
| 1495 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
| 1496 }; | |
| 1497 | |
|
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1498 JNINativeMethod anonk_methods[] = { |
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1499 {CC"defineAnonymousClass", CC"("DAC_Args")"CLS, FN_PTR(Unsafe_DefineAnonymousClass)}, |
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1500 }; |
| 0 | 1501 |
| 1502 #undef CC | |
| 1503 #undef FN_PTR | |
| 1504 | |
| 1505 #undef ADR | |
| 1506 #undef LANG | |
| 1507 #undef OBJ | |
| 1508 #undef CLS | |
| 1509 #undef CTR | |
| 1510 #undef FLD | |
| 1511 #undef MTH | |
| 1512 #undef THR | |
| 1513 #undef DC0_Args | |
| 1514 #undef DC1_Args | |
| 1515 | |
| 1516 #undef DECLARE_GETSETOOP | |
| 1517 #undef DECLARE_GETSETNATIVE | |
| 1518 | |
| 1519 | |
| 1520 // This one function is exported, used by NativeLookup. | |
| 1521 // The Unsafe_xxx functions above are called only from the interpreter. | |
| 1522 // The optimizer looks at names and signatures to recognize | |
| 1523 // individual functions. | |
| 1524 | |
| 1525 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
| 1526 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
| 1527 { | |
| 1528 ThreadToNativeFromVM ttnfv(thread); | |
| 1529 { | |
| 1530 env->RegisterNatives(unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); | |
| 1531 if (env->ExceptionOccurred()) { | |
| 1532 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1533 tty->print_cr("Warning: SDK 1.6 Unsafe.loadavg not found."); | |
| 1534 } | |
| 1535 env->ExceptionClear(); | |
| 1536 } | |
| 1537 } | |
| 1538 { | |
| 1539 env->RegisterNatives(unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); | |
| 1540 if (env->ExceptionOccurred()) { | |
| 1541 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1542 tty->print_cr("Warning: SDK 1.6 Unsafe.prefetchRead/Write not found."); | |
| 1543 } | |
| 1544 env->ExceptionClear(); | |
| 1545 } | |
| 1546 } | |
| 1547 { | |
| 1548 env->RegisterNatives(unsafecls, memcopy_methods, sizeof(memcopy_methods)/sizeof(JNINativeMethod)); | |
| 1549 if (env->ExceptionOccurred()) { | |
| 1550 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1551 tty->print_cr("Warning: SDK 1.7 Unsafe.copyMemory not found."); | |
| 1552 } | |
| 1553 env->ExceptionClear(); | |
| 1554 env->RegisterNatives(unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); | |
| 1555 if (env->ExceptionOccurred()) { | |
| 1556 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1557 tty->print_cr("Warning: SDK 1.5 Unsafe.copyMemory not found."); | |
| 1558 } | |
| 1559 env->ExceptionClear(); | |
| 1560 } | |
| 1561 } | |
| 1562 } | |
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1563 if (AnonymousClasses) { |
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1564 env->RegisterNatives(unsafecls, anonk_methods, sizeof(anonk_methods)/sizeof(JNINativeMethod)); |
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1565 if (env->ExceptionOccurred()) { |
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1566 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1567 tty->print_cr("Warning: SDK 1.7 Unsafe.defineClass (anonymous version) not found."); |
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1568 } |
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1569 env->ExceptionClear(); |
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1570 } |
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1571 } |
| 0 | 1572 int status = env->RegisterNatives(unsafecls, methods, sizeof(methods)/sizeof(JNINativeMethod)); |
| 1573 if (env->ExceptionOccurred()) { | |
| 1574 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1575 tty->print_cr("Warning: SDK 1.6 version of Unsafe not found."); | |
| 1576 } | |
| 1577 env->ExceptionClear(); | |
| 1578 // %%% For now, be backward compatible with an older class: | |
| 1579 status = env->RegisterNatives(unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); | |
| 1580 } | |
| 1581 if (env->ExceptionOccurred()) { | |
| 1582 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1583 tty->print_cr("Warning: SDK 1.5 version of Unsafe not found."); | |
| 1584 } | |
| 1585 env->ExceptionClear(); | |
| 1586 // %%% For now, be backward compatible with an older class: | |
| 1587 status = env->RegisterNatives(unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); | |
| 1588 } | |
| 1589 if (env->ExceptionOccurred()) { | |
| 1590 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1591 tty->print_cr("Warning: SDK 1.4.1 version of Unsafe not found."); | |
| 1592 } | |
| 1593 env->ExceptionClear(); | |
| 1594 // %%% For now, be backward compatible with an older class: | |
| 1595 status = env->RegisterNatives(unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); | |
| 1596 } | |
| 1597 guarantee(status == 0, "register unsafe natives"); | |
| 1598 } | |
| 1599 JVM_END |