Mercurial > hg > truffle
annotate src/share/vm/prims/unsafe.cpp @ 2114:4fc084dac61e
7009756: volatile variables could be broken throw reflection API
Summary: Use Atomic::load() and Atomic::store() to access a volatile long.
Reviewed-by: iveresov, jrose, dholmes, never
| author | kvn |
|---|---|
| date | Fri, 07 Jan 2011 10:16:57 -0800 |
| parents | f95d63e2154a |
| children | 3582bf76420e |
| 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); | |
| 113 #ifdef ASSERT | |
| 114 if (p != NULL) { | |
| 115 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
| 116 if (byte_offset == (jint)byte_offset) { | |
| 117 void* ptr_plus_disp = (address)p + byte_offset; | |
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118 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
| 0 | 119 "raw [ptr+disp] must be consistent with oop::field_base"); |
| 120 } | |
| 121 } | |
| 122 #endif | |
| 123 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
| 124 return (address)p + (jint) byte_offset; | |
| 125 else | |
| 126 return (address)p + byte_offset; | |
| 127 } | |
| 128 | |
| 129 // Externally callable versions: | |
| 130 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
| 131 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
| 132 return field_offset; | |
| 133 } | |
| 134 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
| 135 return byte_offset; | |
| 136 } | |
| 137 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
| 138 return invocation_key_from_method_slot(slot); | |
| 139 } | |
| 140 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
| 141 return invocation_key_to_method_slot(key); | |
| 142 } | |
| 143 | |
| 144 | |
| 145 ///// Data in the Java heap. | |
| 146 | |
| 147 #define GET_FIELD(obj, offset, type_name, v) \ | |
| 148 oop p = JNIHandles::resolve(obj); \ | |
| 149 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
| 150 | |
| 151 #define SET_FIELD(obj, offset, type_name, x) \ | |
| 152 oop p = JNIHandles::resolve(obj); \ | |
| 153 *(type_name*)index_oop_from_field_offset_long(p, offset) = x | |
| 154 | |
| 155 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
| 156 oop p = JNIHandles::resolve(obj); \ | |
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157 volatile type_name v = OrderAccess::load_acquire((volatile type_name*)index_oop_from_field_offset_long(p, offset)); |
| 0 | 158 |
| 159 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
| 160 oop p = JNIHandles::resolve(obj); \ | |
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161 OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), x); |
| 0 | 162 |
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163 // Macros for oops that check UseCompressedOops |
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164 |
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165 #define GET_OOP_FIELD(obj, offset, v) \ |
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166 oop p = JNIHandles::resolve(obj); \ |
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167 oop v; \ |
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168 if (UseCompressedOops) { \ |
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169 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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170 v = oopDesc::decode_heap_oop(n); \ |
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171 } else { \ |
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172 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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173 } |
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174 |
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175 #define GET_OOP_FIELD_VOLATILE(obj, offset, v) \ |
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176 oop p = JNIHandles::resolve(obj); \ |
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177 volatile oop v; \ |
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178 if (UseCompressedOops) { \ |
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179 volatile narrowOop n = *(volatile narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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180 v = oopDesc::decode_heap_oop(n); \ |
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181 } else { \ |
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182 v = *(volatile oop*)index_oop_from_field_offset_long(p, offset); \ |
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183 } \ |
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184 OrderAccess::acquire(); |
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185 |
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186 |
| 0 | 187 // Get/SetObject must be special-cased, since it works with handles. |
| 188 | |
| 189 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
| 190 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
| 191 UnsafeWrapper("Unsafe_GetObject"); | |
| 192 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
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193 GET_OOP_FIELD(obj, offset, v) |
| 0 | 194 return JNIHandles::make_local(env, v); |
| 195 UNSAFE_END | |
| 196 | |
| 197 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
| 198 UnsafeWrapper("Unsafe_SetObject"); | |
| 199 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
| 200 oop x = JNIHandles::resolve(x_h); | |
| 201 //SET_FIELD(obj, offset, oop, x); | |
| 202 oop p = JNIHandles::resolve(obj); | |
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203 if (UseCompressedOops) { |
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204 if (x != NULL) { |
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205 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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206 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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207 } else { |
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208 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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209 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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210 } |
| 0 | 211 } else { |
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212 if (x != NULL) { |
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213 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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214 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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215 } else { |
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216 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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217 } |
| 0 | 218 } |
| 219 UNSAFE_END | |
| 220 | |
| 221 // The normal variants allow a null base pointer with an arbitrary address. | |
| 222 // But if the base pointer is non-null, the offset should make some sense. | |
| 223 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
| 224 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 225 UnsafeWrapper("Unsafe_GetObject"); | |
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226 GET_OOP_FIELD(obj, offset, v) |
| 0 | 227 return JNIHandles::make_local(env, v); |
| 228 UNSAFE_END | |
| 229 | |
| 230 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 231 UnsafeWrapper("Unsafe_SetObject"); | |
| 232 oop x = JNIHandles::resolve(x_h); | |
| 233 oop p = JNIHandles::resolve(obj); | |
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234 if (UseCompressedOops) { |
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235 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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236 } else { |
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237 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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238 } |
| 0 | 239 UNSAFE_END |
| 240 | |
| 241 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 242 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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243 GET_OOP_FIELD_VOLATILE(obj, offset, v) |
| 0 | 244 return JNIHandles::make_local(env, v); |
| 245 UNSAFE_END | |
| 246 | |
| 247 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 248 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
| 249 oop x = JNIHandles::resolve(x_h); | |
| 250 oop p = JNIHandles::resolve(obj); | |
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251 void* addr = index_oop_from_field_offset_long(p, offset); |
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252 OrderAccess::release(); |
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253 if (UseCompressedOops) { |
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254 oop_store((narrowOop*)addr, x); |
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255 } else { |
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256 oop_store((oop*)addr, x); |
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257 } |
| 0 | 258 OrderAccess::fence(); |
| 259 UNSAFE_END | |
| 260 | |
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261 #if defined(SPARC) || defined(X86) |
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262 // Sparc and X86 have atomic jlong (8 bytes) instructions |
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263 |
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264 #else |
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265 // Keep old code for platforms which may not have atomic jlong (8 bytes) instructions |
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266 |
| 0 | 267 // Volatile long versions must use locks if !VM_Version::supports_cx8(). |
| 268 // support_cx8 is a surrogate for 'supports atomic long memory ops'. | |
| 269 | |
| 270 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 271 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
| 272 { | |
| 273 if (VM_Version::supports_cx8()) { | |
| 274 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
| 275 return v; | |
| 276 } | |
| 277 else { | |
| 278 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 279 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 280 ObjectLocker ol(p, THREAD); | |
| 281 jlong value = *addr; | |
| 282 return value; | |
| 283 } | |
| 284 } | |
| 285 UNSAFE_END | |
| 286 | |
| 287 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
| 288 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
| 289 { | |
| 290 if (VM_Version::supports_cx8()) { | |
| 291 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
| 292 } | |
| 293 else { | |
| 294 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 295 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 296 ObjectLocker ol(p, THREAD); | |
| 297 *addr = x; | |
| 298 } | |
| 299 } | |
| 300 UNSAFE_END | |
| 301 | |
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302 #endif // not SPARC and not X86 |
| 0 | 303 |
| 304 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
| 305 \ | |
| 306 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
| 307 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 308 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
| 309 GET_FIELD(obj, offset, jboolean, v); \ | |
| 310 return v; \ | |
| 311 UNSAFE_END \ | |
| 312 \ | |
| 313 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
| 314 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 315 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
| 316 SET_FIELD(obj, offset, jboolean, x); \ | |
| 317 UNSAFE_END \ | |
| 318 \ | |
| 319 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
| 320 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 321 GET_FIELD(obj, offset, jboolean, v); \ | |
| 322 return v; \ | |
| 323 UNSAFE_END \ | |
| 324 \ | |
| 325 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
| 326 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 327 SET_FIELD(obj, offset, jboolean, x); \ | |
| 328 UNSAFE_END \ | |
| 329 \ | |
| 330 // END DEFINE_GETSETOOP. | |
| 331 | |
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332 DEFINE_GETSETOOP(jboolean, Boolean) |
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333 DEFINE_GETSETOOP(jbyte, Byte) |
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334 DEFINE_GETSETOOP(jshort, Short); |
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335 DEFINE_GETSETOOP(jchar, Char); |
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336 DEFINE_GETSETOOP(jint, Int); |
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337 DEFINE_GETSETOOP(jlong, Long); |
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338 DEFINE_GETSETOOP(jfloat, Float); |
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339 DEFINE_GETSETOOP(jdouble, Double); |
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340 |
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341 #undef DEFINE_GETSETOOP |
| 0 | 342 |
| 343 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
| 344 \ | |
| 345 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
| 346 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 347 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
| 348 return v; \ | |
| 349 UNSAFE_END \ | |
| 350 \ | |
| 351 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
| 352 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 353 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
| 354 UNSAFE_END \ | |
| 355 \ | |
| 356 // END DEFINE_GETSETOOP_VOLATILE. | |
| 357 | |
| 358 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
| 359 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
| 360 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
| 361 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
| 362 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
| 363 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
| 364 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
| 365 | |
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366 #if defined(SPARC) || defined(X86) |
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367 // Sparc and X86 have atomic jlong (8 bytes) instructions |
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368 DEFINE_GETSETOOP_VOLATILE(jlong, Long); |
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369 #endif |
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370 |
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371 #undef DEFINE_GETSETOOP_VOLATILE |
| 0 | 372 |
| 373 // The non-intrinsified versions of setOrdered just use setVolatile | |
| 374 | |
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375 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) |
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376 UnsafeWrapper("Unsafe_SetOrderedInt"); |
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377 SET_FIELD_VOLATILE(obj, offset, jint, x); |
| 0 | 378 UNSAFE_END |
| 379 | |
| 380 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 381 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
| 382 oop x = JNIHandles::resolve(x_h); | |
| 383 oop p = JNIHandles::resolve(obj); | |
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384 void* addr = index_oop_from_field_offset_long(p, offset); |
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385 OrderAccess::release(); |
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386 if (UseCompressedOops) { |
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387 oop_store((narrowOop*)addr, x); |
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388 } else { |
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389 oop_store((oop*)addr, x); |
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390 } |
| 0 | 391 OrderAccess::fence(); |
| 392 UNSAFE_END | |
| 393 | |
| 394 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
| 395 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
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396 #if defined(SPARC) || defined(X86) |
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397 // Sparc and X86 have atomic jlong (8 bytes) instructions |
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398 SET_FIELD_VOLATILE(obj, offset, jlong, x); |
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399 #else |
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400 // Keep old code for platforms which may not have atomic long (8 bytes) instructions |
| 0 | 401 { |
| 402 if (VM_Version::supports_cx8()) { | |
| 403 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
| 404 } | |
| 405 else { | |
| 406 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 407 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 408 ObjectLocker ol(p, THREAD); | |
| 409 *addr = x; | |
| 410 } | |
| 411 } | |
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412 #endif |
| 0 | 413 UNSAFE_END |
| 414 | |
| 415 ////// Data in the C heap. | |
| 416 | |
| 417 // Note: These do not throw NullPointerException for bad pointers. | |
| 418 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
| 419 // | |
| 420 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
| 421 \ | |
| 422 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
| 423 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
| 424 void* p = addr_from_java(addr); \ | |
| 425 JavaThread* t = JavaThread::current(); \ | |
| 426 t->set_doing_unsafe_access(true); \ | |
| 427 java_type x = *(volatile native_type*)p; \ | |
| 428 t->set_doing_unsafe_access(false); \ | |
| 429 return x; \ | |
| 430 UNSAFE_END \ | |
| 431 \ | |
| 432 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
| 433 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
| 434 JavaThread* t = JavaThread::current(); \ | |
| 435 t->set_doing_unsafe_access(true); \ | |
| 436 void* p = addr_from_java(addr); \ | |
| 437 *(volatile native_type*)p = x; \ | |
| 438 t->set_doing_unsafe_access(false); \ | |
| 439 UNSAFE_END \ | |
| 440 \ | |
| 441 // END DEFINE_GETSETNATIVE. | |
| 442 | |
| 443 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
| 444 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
| 445 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
| 446 DEFINE_GETSETNATIVE(jint, Int, jint); | |
| 447 // no long -- handled specially | |
| 448 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
| 449 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
| 450 | |
| 451 #undef DEFINE_GETSETNATIVE | |
| 452 | |
| 453 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 454 UnsafeWrapper("Unsafe_GetNativeLong"); | |
| 455 JavaThread* t = JavaThread::current(); | |
| 456 // We do it this way to avoid problems with access to heap using 64 | |
| 457 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
| 458 // some CPUs (SPARC) it leads to SIGBUS. | |
| 459 t->set_doing_unsafe_access(true); | |
| 460 void* p = addr_from_java(addr); | |
| 461 jlong x; | |
| 462 if (((intptr_t)p & 7) == 0) { | |
| 463 // jlong is aligned, do a volatile access | |
| 464 x = *(volatile jlong*)p; | |
| 465 } else { | |
| 466 jlong_accessor acc; | |
| 467 acc.words[0] = ((volatile jint*)p)[0]; | |
| 468 acc.words[1] = ((volatile jint*)p)[1]; | |
| 469 x = acc.long_value; | |
| 470 } | |
| 471 t->set_doing_unsafe_access(false); | |
| 472 return x; | |
| 473 UNSAFE_END | |
| 474 | |
| 475 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
| 476 UnsafeWrapper("Unsafe_SetNativeLong"); | |
| 477 JavaThread* t = JavaThread::current(); | |
| 478 // see comment for Unsafe_GetNativeLong | |
| 479 t->set_doing_unsafe_access(true); | |
| 480 void* p = addr_from_java(addr); | |
| 481 if (((intptr_t)p & 7) == 0) { | |
| 482 // jlong is aligned, do a volatile access | |
| 483 *(volatile jlong*)p = x; | |
| 484 } else { | |
| 485 jlong_accessor acc; | |
| 486 acc.long_value = x; | |
| 487 ((volatile jint*)p)[0] = acc.words[0]; | |
| 488 ((volatile jint*)p)[1] = acc.words[1]; | |
| 489 } | |
| 490 t->set_doing_unsafe_access(false); | |
| 491 UNSAFE_END | |
| 492 | |
| 493 | |
| 494 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 495 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
| 496 void* p = addr_from_java(addr); | |
| 497 return addr_to_java(*(void**)p); | |
| 498 UNSAFE_END | |
| 499 | |
| 500 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
| 501 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
| 502 void* p = addr_from_java(addr); | |
| 503 *(void**)p = addr_from_java(x); | |
| 504 UNSAFE_END | |
| 505 | |
| 506 | |
| 507 ////// Allocation requests | |
| 508 | |
| 509 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
| 510 UnsafeWrapper("Unsafe_AllocateInstance"); | |
| 511 { | |
| 512 ThreadToNativeFromVM ttnfv(thread); | |
| 513 return env->AllocObject(cls); | |
| 514 } | |
| 515 UNSAFE_END | |
| 516 | |
| 517 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
| 518 UnsafeWrapper("Unsafe_AllocateMemory"); | |
| 519 size_t sz = (size_t)size; | |
| 520 if (sz != (julong)size || size < 0) { | |
| 521 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 522 } | |
| 523 if (sz == 0) { | |
| 524 return 0; | |
| 525 } | |
| 526 sz = round_to(sz, HeapWordSize); | |
| 527 void* x = os::malloc(sz); | |
| 528 if (x == NULL) { | |
| 529 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
| 530 } | |
| 531 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
| 532 return addr_to_java(x); | |
| 533 UNSAFE_END | |
| 534 | |
| 535 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
| 536 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
| 537 void* p = addr_from_java(addr); | |
| 538 size_t sz = (size_t)size; | |
| 539 if (sz != (julong)size || size < 0) { | |
| 540 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 541 } | |
| 542 if (sz == 0) { | |
| 543 os::free(p); | |
| 544 return 0; | |
| 545 } | |
| 546 sz = round_to(sz, HeapWordSize); | |
| 547 void* x = (p == NULL) ? os::malloc(sz) : os::realloc(p, sz); | |
| 548 if (x == NULL) { | |
| 549 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
| 550 } | |
| 551 return addr_to_java(x); | |
| 552 UNSAFE_END | |
| 553 | |
| 554 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 555 UnsafeWrapper("Unsafe_FreeMemory"); | |
| 556 void* p = addr_from_java(addr); | |
| 557 if (p == NULL) { | |
| 558 return; | |
| 559 } | |
| 560 os::free(p); | |
| 561 UNSAFE_END | |
| 562 | |
| 563 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
| 564 UnsafeWrapper("Unsafe_SetMemory"); | |
| 565 size_t sz = (size_t)size; | |
| 566 if (sz != (julong)size || size < 0) { | |
| 567 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 568 } | |
| 569 char* p = (char*) addr_from_java(addr); | |
| 570 Copy::fill_to_memory_atomic(p, sz, value); | |
| 571 UNSAFE_END | |
| 572 | |
| 573 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
| 574 UnsafeWrapper("Unsafe_SetMemory"); | |
| 575 size_t sz = (size_t)size; | |
| 576 if (sz != (julong)size || size < 0) { | |
| 577 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 578 } | |
| 579 oop base = JNIHandles::resolve(obj); | |
| 580 void* p = index_oop_from_field_offset_long(base, offset); | |
| 581 Copy::fill_to_memory_atomic(p, sz, value); | |
| 582 UNSAFE_END | |
| 583 | |
| 584 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
| 585 UnsafeWrapper("Unsafe_CopyMemory"); | |
| 586 if (size == 0) { | |
| 587 return; | |
| 588 } | |
| 589 size_t sz = (size_t)size; | |
| 590 if (sz != (julong)size || size < 0) { | |
| 591 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 592 } | |
| 593 void* src = addr_from_java(srcAddr); | |
| 594 void* dst = addr_from_java(dstAddr); | |
| 595 Copy::conjoint_memory_atomic(src, dst, sz); | |
| 596 UNSAFE_END | |
| 597 | |
| 598 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
| 599 UnsafeWrapper("Unsafe_CopyMemory"); | |
| 600 if (size == 0) { | |
| 601 return; | |
| 602 } | |
| 603 size_t sz = (size_t)size; | |
| 604 if (sz != (julong)size || size < 0) { | |
| 605 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 606 } | |
| 607 oop srcp = JNIHandles::resolve(srcObj); | |
| 608 oop dstp = JNIHandles::resolve(dstObj); | |
| 609 if (dstp != NULL && !dstp->is_typeArray()) { | |
| 610 // NYI: This works only for non-oop arrays at present. | |
| 611 // Generalizing it would be reasonable, but requires card marking. | |
| 612 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
| 613 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 614 } | |
| 615 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
| 616 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
| 617 Copy::conjoint_memory_atomic(src, dst, sz); | |
| 618 UNSAFE_END | |
| 619 | |
| 620 | |
| 621 ////// Random queries | |
| 622 | |
| 623 // See comment at file start about UNSAFE_LEAF | |
| 624 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
| 625 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
| 626 UnsafeWrapper("Unsafe_AddressSize"); | |
| 627 return sizeof(void*); | |
| 628 UNSAFE_END | |
| 629 | |
| 630 // See comment at file start about UNSAFE_LEAF | |
| 631 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
| 632 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
| 633 UnsafeWrapper("Unsafe_PageSize"); | |
| 634 return os::vm_page_size(); | |
| 635 UNSAFE_END | |
| 636 | |
| 637 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
| 638 if (field == NULL) { | |
| 639 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 640 } | |
| 641 | |
| 642 oop reflected = JNIHandles::resolve_non_null(field); | |
| 643 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
| 644 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 645 int slot = java_lang_reflect_Field::slot(reflected); | |
| 646 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
| 647 | |
| 648 if (must_be_static >= 0) { | |
| 649 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
| 650 if (must_be_static != really_is_static) { | |
| 651 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 652 } | |
| 653 } | |
| 654 | |
| 655 int offset = instanceKlass::cast(k)->offset_from_fields(slot); | |
| 656 return field_offset_from_byte_offset(offset); | |
| 657 } | |
| 658 | |
| 659 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 660 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
| 661 return find_field_offset(field, 0, THREAD); | |
| 662 UNSAFE_END | |
| 663 | |
| 664 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 665 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
| 666 return find_field_offset(field, 1, THREAD); | |
| 667 UNSAFE_END | |
| 668 | |
| 669 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
| 670 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
| 671 // Note: In this VM implementation, a field address is always a short | |
| 672 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
| 673 // range of the return type is never used. However, some implementations | |
| 674 // might put the static field inside an array shared by many classes, | |
| 675 // or even at a fixed address, in which case the address could be quite | |
| 676 // large. In that last case, this function would return NULL, since | |
| 677 // the address would operate alone, without any base pointer. | |
| 678 | |
| 679 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 680 | |
| 681 oop reflected = JNIHandles::resolve_non_null(field); | |
| 682 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
| 683 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
| 684 | |
| 685 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
| 686 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 687 } | |
| 688 | |
| 689 return JNIHandles::make_local(env, java_lang_Class::as_klassOop(mirror)); | |
| 690 UNSAFE_END | |
| 691 | |
| 692 //@deprecated | |
| 693 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 694 UnsafeWrapper("Unsafe_FieldOffset"); | |
| 695 // tries (but fails) to be polymorphic between static and non-static: | |
| 696 jlong offset = find_field_offset(field, -1, THREAD); | |
| 697 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
| 698 return (jint)offset; | |
| 699 UNSAFE_END | |
| 700 | |
| 701 //@deprecated | |
| 702 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
| 703 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
| 704 if (clazz == NULL) { | |
| 705 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 706 } | |
| 707 return JNIHandles::make_local(env, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); | |
| 708 UNSAFE_END | |
| 709 | |
| 710 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) | |
| 711 UnsafeWrapper("Unsafe_EnsureClassInitialized"); | |
| 712 if (clazz == NULL) { | |
| 713 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 714 } | |
| 715 oop mirror = JNIHandles::resolve_non_null(clazz); | |
| 716 instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(mirror)); | |
| 717 if (k != NULL) { | |
| 718 k->initialize(CHECK); | |
| 719 } | |
| 720 UNSAFE_END | |
| 721 | |
| 722 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
| 723 if (acls == NULL) { | |
| 724 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 725 } | |
| 726 oop mirror = JNIHandles::resolve_non_null(acls); | |
| 727 klassOop k = java_lang_Class::as_klassOop(mirror); | |
| 728 if (k == NULL || !k->klass_part()->oop_is_array()) { | |
| 729 THROW(vmSymbols::java_lang_InvalidClassException()); | |
| 730 } else if (k->klass_part()->oop_is_objArray()) { | |
| 731 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); | |
|
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732 scale = heapOopSize; |
| 0 | 733 } else if (k->klass_part()->oop_is_typeArray()) { |
| 734 typeArrayKlass* tak = typeArrayKlass::cast(k); | |
| 735 base = tak->array_header_in_bytes(); | |
| 736 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
| 737 scale = (1 << tak->log2_element_size()); | |
| 738 } else { | |
| 739 ShouldNotReachHere(); | |
| 740 } | |
| 741 } | |
| 742 | |
| 743 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
| 744 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
| 745 int base, scale; | |
| 746 getBaseAndScale(base, scale, acls, CHECK_0); | |
| 747 return field_offset_from_byte_offset(base); | |
| 748 UNSAFE_END | |
| 749 | |
| 750 | |
| 751 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
| 752 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
| 753 int base, scale; | |
| 754 getBaseAndScale(base, scale, acls, CHECK_0); | |
| 755 // This VM packs both fields and array elements down to the byte. | |
| 756 // But watch out: If this changes, so that array references for | |
| 757 // a given primitive type (say, T_BOOLEAN) use different memory units | |
| 758 // than fields, this method MUST return zero for such arrays. | |
| 759 // For example, the VM used to store sub-word sized fields in full | |
| 760 // words in the object layout, so that accessors like getByte(Object,int) | |
| 761 // did not really do what one might expect for arrays. Therefore, | |
| 762 // this function used to report a zero scale factor, so that the user | |
| 763 // would know not to attempt to access sub-word array elements. | |
| 764 // // Code for unpacked fields: | |
| 765 // if (scale < wordSize) return 0; | |
| 766 | |
| 767 // The following allows for a pretty general fieldOffset cookie scheme, | |
| 768 // but requires it to be linear in byte offset. | |
| 769 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
| 770 UNSAFE_END | |
| 771 | |
| 772 | |
| 773 static inline void throw_new(JNIEnv *env, const char *ename) { | |
| 774 char buf[100]; | |
| 775 strcpy(buf, "java/lang/"); | |
| 776 strcat(buf, ename); | |
| 777 jclass cls = env->FindClass(buf); | |
| 778 char* msg = NULL; | |
| 779 env->ThrowNew(cls, msg); | |
| 780 } | |
| 781 | |
| 782 static jclass Unsafe_DefineClass(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { | |
| 783 { | |
| 784 // Code lifted from JDK 1.3 ClassLoader.c | |
| 785 | |
| 786 jbyte *body; | |
| 787 char *utfName; | |
| 788 jclass result = 0; | |
| 789 char buf[128]; | |
| 790 | |
| 791 if (UsePerfData) { | |
| 792 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
| 793 } | |
| 794 | |
| 795 if (data == NULL) { | |
| 796 throw_new(env, "NullPointerException"); | |
| 797 return 0; | |
| 798 } | |
| 799 | |
| 800 /* Work around 4153825. malloc crashes on Solaris when passed a | |
| 801 * negative size. | |
| 802 */ | |
| 803 if (length < 0) { | |
| 804 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
| 805 return 0; | |
| 806 } | |
| 807 | |
| 808 body = NEW_C_HEAP_ARRAY(jbyte, length); | |
| 809 | |
| 810 if (body == 0) { | |
| 811 throw_new(env, "OutOfMemoryError"); | |
| 812 return 0; | |
| 813 } | |
| 814 | |
| 815 env->GetByteArrayRegion(data, offset, length, body); | |
| 816 | |
| 817 if (env->ExceptionOccurred()) | |
| 818 goto free_body; | |
| 819 | |
| 820 if (name != NULL) { | |
| 821 uint len = env->GetStringUTFLength(name); | |
| 822 int unicode_len = env->GetStringLength(name); | |
| 823 if (len >= sizeof(buf)) { | |
| 824 utfName = NEW_C_HEAP_ARRAY(char, len + 1); | |
| 825 if (utfName == NULL) { | |
| 826 throw_new(env, "OutOfMemoryError"); | |
| 827 goto free_body; | |
| 828 } | |
| 829 } else { | |
| 830 utfName = buf; | |
| 831 } | |
| 832 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
| 833 //VerifyFixClassname(utfName); | |
| 834 for (uint i = 0; i < len; i++) { | |
| 835 if (utfName[i] == '.') utfName[i] = '/'; | |
| 836 } | |
| 837 } else { | |
| 838 utfName = NULL; | |
| 839 } | |
| 840 | |
| 841 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
| 842 | |
| 843 if (utfName && utfName != buf) | |
| 844 FREE_C_HEAP_ARRAY(char, utfName); | |
| 845 | |
| 846 free_body: | |
| 847 FREE_C_HEAP_ARRAY(jbyte, body); | |
| 848 return result; | |
| 849 } | |
| 850 } | |
| 851 | |
| 852 | |
| 853 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) | |
| 854 UnsafeWrapper("Unsafe_DefineClass"); | |
| 855 { | |
| 856 ThreadToNativeFromVM ttnfv(thread); | |
| 857 | |
| 858 int depthFromDefineClass0 = 1; | |
| 859 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
| 860 jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller); | |
| 861 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); | |
| 862 | |
| 863 return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); | |
| 864 } | |
| 865 UNSAFE_END | |
| 866 | |
| 867 | |
| 868 UNSAFE_ENTRY(jclass, Unsafe_DefineClass1(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd)) | |
| 869 UnsafeWrapper("Unsafe_DefineClass"); | |
| 870 { | |
| 871 ThreadToNativeFromVM ttnfv(thread); | |
| 872 | |
| 873 return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); | |
| 874 } | |
| 875 UNSAFE_END | |
| 876 | |
|
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877 #define DAC_Args CLS"[B["OBJ |
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878 // define a class but do not make it known to the class loader or system dictionary |
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879 // - host_class: supplies context for linkage, access control, protection domain, and class loader |
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880 // - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
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881 // - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
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882 |
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883 // When you load an anonymous class U, it works as if you changed its name just before loading, |
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884 // to a name that you will never use again. Since the name is lost, no other class can directly |
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885 // link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
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886 // through java.lang.Class methods like Class.newInstance. |
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887 |
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888 // Access checks for linkage sites within U continue to follow the same rules as for named classes. |
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889 // The package of an anonymous class is given by the package qualifier on the name under which it was loaded. |
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890 // An anonymous class also has special privileges to access any member of its host class. |
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891 // This is the main reason why this loading operation is unsafe. The purpose of this is to |
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892 // allow language implementations to simulate "open classes"; a host class in effect gets |
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893 // new code when an anonymous class is loaded alongside it. A less convenient but more |
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894 // standard way to do this is with reflection, which can also be set to ignore access |
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895 // restrictions. |
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896 |
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897 // Access into an anonymous class is possible only through reflection. Therefore, there |
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898 // are no special access rules for calling into an anonymous class. The relaxed access |
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899 // rule for the host class is applied in the opposite direction: A host class reflectively |
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900 // access one of its anonymous classes. |
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901 |
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902 // If you load the same bytecodes twice, you get two different classes. You can reload |
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903 // the same bytecodes with or without varying CP patches. |
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904 |
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905 // By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
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906 // The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
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907 // The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
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908 |
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909 // This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
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910 // an outer class (so that U2 is an anonymous inner class of anonymous U1). |
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911 // It is not possible for a named class, or an older anonymous class, to refer by |
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912 // name (via its CP) to a newer anonymous class. |
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913 |
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914 // CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
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915 // or type descriptors used in the loaded anonymous class. |
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916 |
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917 // Finally, CP patching may be used to introduce "live" objects into the constant pool, |
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918 // instead of "dead" strings. A compiled statement like println((Object)"hello") can |
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919 // be changed to println(greeting), where greeting is an arbitrary object created before |
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920 // the anonymous class is loaded. This is useful in dynamic languages, in which |
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921 // various kinds of metaobjects must be introduced as constants into bytecode. |
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922 // Note the cast (Object), which tells the verifier to expect an arbitrary object, |
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923 // not just a literal string. For such ldc instructions, the verifier uses the |
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924 // type Object instead of String, if the loaded constant is not in fact a String. |
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925 |
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926 static oop |
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927 Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
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928 jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
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929 HeapWord* *temp_alloc, |
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930 TRAPS) { |
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931 |
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932 if (UsePerfData) { |
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933 ClassLoader::unsafe_defineClassCallCounter()->inc(); |
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934 } |
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935 |
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936 if (data == NULL) { |
|
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937 THROW_0(vmSymbols::java_lang_NullPointerException()); |
|
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938 } |
|
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939 |
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940 jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
|
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941 jint word_length = (length + sizeof(HeapWord)-1) / sizeof(HeapWord); |
|
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942 HeapWord* body = NEW_C_HEAP_ARRAY(HeapWord, word_length); |
|
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943 if (body == NULL) { |
|
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944 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
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945 } |
|
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946 |
|
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947 // caller responsible to free it: |
|
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948 (*temp_alloc) = body; |
|
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949 |
|
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950 { |
|
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951 jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
|
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952 Copy::conjoint_words((HeapWord*) array_base, body, word_length); |
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953 } |
|
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954 |
|
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955 u1* class_bytes = (u1*) body; |
|
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956 int class_bytes_length = (int) length; |
|
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957 if (class_bytes_length < 0) class_bytes_length = 0; |
|
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958 if (class_bytes == NULL |
|
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959 || host_class == NULL |
|
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960 || length != class_bytes_length) |
|
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961 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
|
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962 |
|
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963 objArrayHandle cp_patches_h; |
|
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964 if (cp_patches_jh != NULL) { |
|
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965 oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
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966 if (!p->is_objArray()) |
|
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967 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
|
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968 cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
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969 } |
|
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970 |
|
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971 KlassHandle host_klass(THREAD, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(host_class))); |
|
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972 const char* host_source = host_klass->external_name(); |
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973 Handle host_loader(THREAD, host_klass->class_loader()); |
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974 Handle host_domain(THREAD, host_klass->protection_domain()); |
|
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975 |
|
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976 GrowableArray<Handle>* cp_patches = NULL; |
|
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977 if (cp_patches_h.not_null()) { |
|
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978 int alen = cp_patches_h->length(); |
|
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979 for (int i = alen-1; i >= 0; i--) { |
|
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980 oop p = cp_patches_h->obj_at(i); |
|
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981 if (p != NULL) { |
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982 Handle patch(THREAD, p); |
|
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983 if (cp_patches == NULL) |
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984 cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
|
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985 cp_patches->at_put(i, patch); |
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986 } |
|
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987 } |
|
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988 } |
|
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|
989 |
|
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990 ClassFileStream st(class_bytes, class_bytes_length, (char*) host_source); |
|
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991 |
|
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992 instanceKlassHandle anon_klass; |
|
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993 { |
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994 symbolHandle no_class_name; |
|
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995 klassOop anonk = SystemDictionary::parse_stream(no_class_name, |
|
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996 host_loader, host_domain, |
|
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997 &st, host_klass, cp_patches, |
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998 CHECK_NULL); |
|
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999 if (anonk == NULL) return NULL; |
|
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1000 anon_klass = instanceKlassHandle(THREAD, anonk); |
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1001 } |
|
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1002 |
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1003 // let caller initialize it as needed... |
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1004 |
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1005 return anon_klass->java_mirror(); |
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1006 } |
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1007 |
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1008 UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) |
|
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1009 { |
|
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1010 UnsafeWrapper("Unsafe_DefineAnonymousClass"); |
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1011 ResourceMark rm(THREAD); |
|
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1012 |
|
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1013 HeapWord* temp_alloc = NULL; |
|
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1014 |
|
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1015 jobject res_jh = NULL; |
|
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1016 |
|
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1017 { oop res_oop = Unsafe_DefineAnonymousClass_impl(env, |
|
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1018 host_class, data, cp_patches_jh, |
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1019 &temp_alloc, THREAD); |
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1020 if (res_oop != NULL) |
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1021 res_jh = JNIHandles::make_local(env, res_oop); |
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1022 } |
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1023 |
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1024 // try/finally clause: |
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1025 if (temp_alloc != NULL) { |
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1026 FREE_C_HEAP_ARRAY(HeapWord, temp_alloc); |
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1027 } |
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1028 |
|
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1029 return (jclass) res_jh; |
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1030 } |
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1031 UNSAFE_END |
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1032 |
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1033 |
| 0 | 1034 |
| 1035 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1036 UnsafeWrapper("Unsafe_MonitorEnter"); | |
| 1037 { | |
| 1038 if (jobj == NULL) { | |
| 1039 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1040 } | |
| 1041 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
| 1042 ObjectSynchronizer::jni_enter(obj, CHECK); | |
| 1043 } | |
| 1044 UNSAFE_END | |
| 1045 | |
| 1046 | |
| 1047 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1048 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
| 1049 { | |
| 1050 if (jobj == NULL) { | |
| 1051 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
| 1052 } | |
| 1053 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
| 1054 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
| 1055 return (res ? JNI_TRUE : JNI_FALSE); | |
| 1056 } | |
| 1057 UNSAFE_END | |
| 1058 | |
| 1059 | |
| 1060 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1061 UnsafeWrapper("Unsafe_MonitorExit"); | |
| 1062 { | |
| 1063 if (jobj == NULL) { | |
| 1064 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1065 } | |
| 1066 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
| 1067 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
| 1068 } | |
| 1069 UNSAFE_END | |
| 1070 | |
| 1071 | |
| 1072 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
| 1073 UnsafeWrapper("Unsafe_ThrowException"); | |
| 1074 { | |
| 1075 ThreadToNativeFromVM ttnfv(thread); | |
| 1076 env->Throw(thr); | |
| 1077 } | |
| 1078 UNSAFE_END | |
| 1079 | |
| 1080 // JSR166 ------------------------------------------------------------------ | |
| 1081 | |
| 1082 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
| 1083 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
| 1084 oop x = JNIHandles::resolve(x_h); | |
| 1085 oop e = JNIHandles::resolve(e_h); | |
| 1086 oop p = JNIHandles::resolve(obj); | |
|
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1087 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
|
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1088 if (UseCompressedOops) { |
|
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1089 update_barrier_set_pre((narrowOop*)addr, e); |
|
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1090 } else { |
|
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1091 update_barrier_set_pre((oop*)addr, e); |
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1092 } |
|
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1093 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e); |
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1094 jboolean success = (res == e); |
| 0 | 1095 if (success) |
|
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1096 update_barrier_set((void*)addr, x); |
| 0 | 1097 return success; |
| 1098 UNSAFE_END | |
| 1099 | |
| 1100 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
| 1101 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
| 1102 oop p = JNIHandles::resolve(obj); | |
| 1103 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
| 1104 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
| 1105 UNSAFE_END | |
| 1106 | |
| 1107 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
| 1108 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
| 1109 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 1110 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 1111 if (VM_Version::supports_cx8()) | |
| 1112 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
| 1113 else { | |
| 1114 jboolean success = false; | |
| 1115 ObjectLocker ol(p, THREAD); | |
| 1116 if (*addr == e) { *addr = x; success = true; } | |
| 1117 return success; | |
| 1118 } | |
| 1119 UNSAFE_END | |
| 1120 | |
| 1121 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
| 1122 UnsafeWrapper("Unsafe_Park"); | |
|
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1123 HS_DTRACE_PROBE3(hotspot, thread__park__begin, thread->parker(), (int) isAbsolute, time); |
| 0 | 1124 JavaThreadParkedState jtps(thread, time != 0); |
| 1125 thread->parker()->park(isAbsolute != 0, time); | |
|
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1126 HS_DTRACE_PROBE1(hotspot, thread__park__end, thread->parker()); |
| 0 | 1127 UNSAFE_END |
| 1128 | |
| 1129 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
| 1130 UnsafeWrapper("Unsafe_Unpark"); | |
| 1131 Parker* p = NULL; | |
| 1132 if (jthread != NULL) { | |
| 1133 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
| 1134 if (java_thread != NULL) { | |
| 1135 jlong lp = java_lang_Thread::park_event(java_thread); | |
| 1136 if (lp != 0) { | |
| 1137 // This cast is OK even though the jlong might have been read | |
| 1138 // non-atomically on 32bit systems, since there, one word will | |
| 1139 // always be zero anyway and the value set is always the same | |
| 1140 p = (Parker*)addr_from_java(lp); | |
| 1141 } else { | |
| 1142 // Grab lock if apparently null or using older version of library | |
| 1143 MutexLocker mu(Threads_lock); | |
| 1144 java_thread = JNIHandles::resolve_non_null(jthread); | |
| 1145 if (java_thread != NULL) { | |
| 1146 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
| 1147 if (thr != NULL) { | |
| 1148 p = thr->parker(); | |
| 1149 if (p != NULL) { // Bind to Java thread for next time. | |
| 1150 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
| 1151 } | |
| 1152 } | |
| 1153 } | |
| 1154 } | |
| 1155 } | |
| 1156 } | |
| 1157 if (p != NULL) { | |
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1158 HS_DTRACE_PROBE1(hotspot, thread__unpark, p); |
| 0 | 1159 p->unpark(); |
| 1160 } | |
| 1161 UNSAFE_END | |
| 1162 | |
| 1163 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
| 1164 UnsafeWrapper("Unsafe_Loadavg"); | |
| 1165 const int max_nelem = 3; | |
| 1166 double la[max_nelem]; | |
| 1167 jint ret; | |
| 1168 | |
| 1169 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
| 1170 assert(a->is_typeArray(), "must be type array"); | |
| 1171 | |
| 1172 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
| 1173 ThreadToNativeFromVM ttnfv(thread); | |
| 1174 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
| 1175 return -1; | |
| 1176 } | |
| 1177 | |
| 1178 ret = os::loadavg(la, nelem); | |
| 1179 if (ret == -1) return -1; | |
| 1180 | |
| 1181 // if successful, ret is the number of samples actually retrieved. | |
| 1182 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
| 1183 switch(ret) { | |
| 1184 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
| 1185 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
| 1186 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
| 1187 } | |
| 1188 return ret; | |
| 1189 UNSAFE_END | |
| 1190 | |
| 1191 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
| 1192 UnsafeWrapper("Unsafe_PrefetchRead"); | |
| 1193 oop p = JNIHandles::resolve(obj); | |
| 1194 void* addr = index_oop_from_field_offset_long(p, 0); | |
| 1195 Prefetch::read(addr, (intx)offset); | |
| 1196 UNSAFE_END | |
| 1197 | |
| 1198 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
| 1199 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
| 1200 oop p = JNIHandles::resolve(obj); | |
| 1201 void* addr = index_oop_from_field_offset_long(p, 0); | |
| 1202 Prefetch::write(addr, (intx)offset); | |
| 1203 UNSAFE_END | |
| 1204 | |
| 1205 | |
| 1206 /// JVM_RegisterUnsafeMethods | |
| 1207 | |
| 1208 #define ADR "J" | |
| 1209 | |
| 1210 #define LANG "Ljava/lang/" | |
| 1211 | |
| 1212 #define OBJ LANG"Object;" | |
| 1213 #define CLS LANG"Class;" | |
| 1214 #define CTR LANG"reflect/Constructor;" | |
| 1215 #define FLD LANG"reflect/Field;" | |
| 1216 #define MTH LANG"reflect/Method;" | |
| 1217 #define THR LANG"Throwable;" | |
| 1218 | |
| 1219 #define DC0_Args LANG"String;[BII" | |
| 1220 #define DC1_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" | |
| 1221 | |
| 1222 #define CC (char*) /*cast a literal from (const char*)*/ | |
| 1223 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
| 1224 | |
| 1225 // define deprecated accessors for compabitility with 1.4.0 | |
| 1226 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
| 1227 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
| 1228 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
| 1229 | |
| 1230 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
| 1231 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
| 1232 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
| 1233 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
| 1234 | |
| 1235 // Note: In 1.5.0, there are volatile versions too | |
| 1236 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
| 1237 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
| 1238 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
| 1239 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
| 1240 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
| 1241 | |
| 1242 | |
| 1243 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
| 1244 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
| 1245 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
| 1246 | |
| 1247 | |
| 1248 | |
| 1249 // %%% These are temporarily supported until the SDK sources | |
| 1250 // contain the necessarily updated Unsafe.java. | |
| 1251 static JNINativeMethod methods_140[] = { | |
| 1252 | |
| 1253 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
| 1254 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
| 1255 | |
| 1256 DECLARE_GETSETOOP_140(Boolean, Z), | |
| 1257 DECLARE_GETSETOOP_140(Byte, B), | |
| 1258 DECLARE_GETSETOOP_140(Short, S), | |
| 1259 DECLARE_GETSETOOP_140(Char, C), | |
| 1260 DECLARE_GETSETOOP_140(Int, I), | |
| 1261 DECLARE_GETSETOOP_140(Long, J), | |
| 1262 DECLARE_GETSETOOP_140(Float, F), | |
| 1263 DECLARE_GETSETOOP_140(Double, D), | |
| 1264 | |
| 1265 DECLARE_GETSETNATIVE(Byte, B), | |
| 1266 DECLARE_GETSETNATIVE(Short, S), | |
| 1267 DECLARE_GETSETNATIVE(Char, C), | |
| 1268 DECLARE_GETSETNATIVE(Int, I), | |
| 1269 DECLARE_GETSETNATIVE(Long, J), | |
| 1270 DECLARE_GETSETNATIVE(Float, F), | |
| 1271 DECLARE_GETSETNATIVE(Double, D), | |
| 1272 | |
| 1273 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1274 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1275 | |
| 1276 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1277 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1278 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
| 1279 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
| 1280 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1281 | |
| 1282 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, //deprecated | |
| 1283 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, //deprecated | |
| 1284 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1285 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1286 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1287 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1288 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1289 | |
| 1290 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
| 1291 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
| 1292 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
| 1293 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1294 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1295 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
| 1296 }; | |
| 1297 | |
| 1298 // These are the old methods prior to the JSR 166 changes in 1.5.0 | |
| 1299 static JNINativeMethod methods_141[] = { | |
| 1300 | |
| 1301 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
| 1302 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1303 | |
| 1304 DECLARE_GETSETOOP_141(Boolean, Z), | |
| 1305 DECLARE_GETSETOOP_141(Byte, B), | |
| 1306 DECLARE_GETSETOOP_141(Short, S), | |
| 1307 DECLARE_GETSETOOP_141(Char, C), | |
| 1308 DECLARE_GETSETOOP_141(Int, I), | |
| 1309 DECLARE_GETSETOOP_141(Long, J), | |
| 1310 DECLARE_GETSETOOP_141(Float, F), | |
| 1311 DECLARE_GETSETOOP_141(Double, D), | |
| 1312 | |
| 1313 DECLARE_GETSETNATIVE(Byte, B), | |
| 1314 DECLARE_GETSETNATIVE(Short, S), | |
| 1315 DECLARE_GETSETNATIVE(Char, C), | |
| 1316 DECLARE_GETSETNATIVE(Int, I), | |
| 1317 DECLARE_GETSETNATIVE(Long, J), | |
| 1318 DECLARE_GETSETNATIVE(Float, F), | |
| 1319 DECLARE_GETSETNATIVE(Double, D), | |
| 1320 | |
| 1321 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1322 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1323 | |
| 1324 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1325 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1326 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
| 1327 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
| 1328 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1329 | |
| 1330 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1331 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1332 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1333 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1334 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1335 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1336 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1337 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1338 | |
| 1339 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
| 1340 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
| 1341 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
| 1342 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1343 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1344 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
| 1345 | |
| 1346 }; | |
| 1347 | |
| 1348 // These are the old methods prior to the JSR 166 changes in 1.6.0 | |
| 1349 static JNINativeMethod methods_15[] = { | |
| 1350 | |
| 1351 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
| 1352 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1353 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
| 1354 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
| 1355 | |
| 1356 | |
| 1357 DECLARE_GETSETOOP(Boolean, Z), | |
| 1358 DECLARE_GETSETOOP(Byte, B), | |
| 1359 DECLARE_GETSETOOP(Short, S), | |
| 1360 DECLARE_GETSETOOP(Char, C), | |
| 1361 DECLARE_GETSETOOP(Int, I), | |
| 1362 DECLARE_GETSETOOP(Long, J), | |
| 1363 DECLARE_GETSETOOP(Float, F), | |
| 1364 DECLARE_GETSETOOP(Double, D), | |
| 1365 | |
| 1366 DECLARE_GETSETNATIVE(Byte, B), | |
| 1367 DECLARE_GETSETNATIVE(Short, S), | |
| 1368 DECLARE_GETSETNATIVE(Char, C), | |
| 1369 DECLARE_GETSETNATIVE(Int, I), | |
| 1370 DECLARE_GETSETNATIVE(Long, J), | |
| 1371 DECLARE_GETSETNATIVE(Float, F), | |
| 1372 DECLARE_GETSETNATIVE(Double, D), | |
| 1373 | |
| 1374 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1375 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1376 | |
| 1377 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1378 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1379 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
| 1380 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
| 1381 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1382 | |
| 1383 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1384 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1385 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1386 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1387 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1388 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1389 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1390 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1391 | |
| 1392 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
| 1393 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
| 1394 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
| 1395 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1396 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1397 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
| 1398 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
| 1399 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
| 1400 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
| 1401 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
| 1402 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
| 1403 | |
| 1404 }; | |
| 1405 | |
| 1406 // These are the correct methods, moving forward: | |
| 1407 static JNINativeMethod methods[] = { | |
| 1408 | |
| 1409 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
| 1410 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1411 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
| 1412 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
| 1413 | |
| 1414 | |
| 1415 DECLARE_GETSETOOP(Boolean, Z), | |
| 1416 DECLARE_GETSETOOP(Byte, B), | |
| 1417 DECLARE_GETSETOOP(Short, S), | |
| 1418 DECLARE_GETSETOOP(Char, C), | |
| 1419 DECLARE_GETSETOOP(Int, I), | |
| 1420 DECLARE_GETSETOOP(Long, J), | |
| 1421 DECLARE_GETSETOOP(Float, F), | |
| 1422 DECLARE_GETSETOOP(Double, D), | |
| 1423 | |
| 1424 DECLARE_GETSETNATIVE(Byte, B), | |
| 1425 DECLARE_GETSETNATIVE(Short, S), | |
| 1426 DECLARE_GETSETNATIVE(Char, C), | |
| 1427 DECLARE_GETSETNATIVE(Int, I), | |
| 1428 DECLARE_GETSETNATIVE(Long, J), | |
| 1429 DECLARE_GETSETNATIVE(Float, F), | |
| 1430 DECLARE_GETSETNATIVE(Double, D), | |
| 1431 | |
| 1432 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1433 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1434 | |
| 1435 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1436 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1437 // {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
| 1438 // {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, | |
| 1439 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1440 | |
| 1441 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1442 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1443 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1444 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1445 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1446 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1447 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1448 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1449 | |
| 1450 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
| 1451 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, | |
| 1452 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, | |
| 1453 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1454 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1455 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
| 1456 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
| 1457 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
| 1458 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
| 1459 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
| 1460 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
| 1461 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
| 1462 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
| 1463 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
| 1464 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
| 1465 | |
| 1466 // {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)}, | |
| 1467 | |
| 1468 // {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
| 1469 // {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
| 1470 // {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
| 1471 // {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
| 1472 | |
| 1473 }; | |
| 1474 | |
| 1475 JNINativeMethod loadavg_method[] = { | |
| 1476 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} | |
| 1477 }; | |
| 1478 | |
| 1479 JNINativeMethod prefetch_methods[] = { | |
| 1480 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
| 1481 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
| 1482 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
| 1483 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
| 1484 }; | |
| 1485 | |
| 1486 JNINativeMethod memcopy_methods[] = { | |
| 1487 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, | |
| 1488 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
| 1489 }; | |
| 1490 | |
| 1491 JNINativeMethod memcopy_methods_15[] = { | |
| 1492 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
| 1493 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
| 1494 }; | |
| 1495 | |
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1496 JNINativeMethod anonk_methods[] = { |
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1497 {CC"defineAnonymousClass", CC"("DAC_Args")"CLS, FN_PTR(Unsafe_DefineAnonymousClass)}, |
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1498 }; |
| 0 | 1499 |
| 1500 #undef CC | |
| 1501 #undef FN_PTR | |
| 1502 | |
| 1503 #undef ADR | |
| 1504 #undef LANG | |
| 1505 #undef OBJ | |
| 1506 #undef CLS | |
| 1507 #undef CTR | |
| 1508 #undef FLD | |
| 1509 #undef MTH | |
| 1510 #undef THR | |
| 1511 #undef DC0_Args | |
| 1512 #undef DC1_Args | |
| 1513 | |
| 1514 #undef DECLARE_GETSETOOP | |
| 1515 #undef DECLARE_GETSETNATIVE | |
| 1516 | |
| 1517 | |
| 1518 // This one function is exported, used by NativeLookup. | |
| 1519 // The Unsafe_xxx functions above are called only from the interpreter. | |
| 1520 // The optimizer looks at names and signatures to recognize | |
| 1521 // individual functions. | |
| 1522 | |
| 1523 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
| 1524 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
| 1525 { | |
| 1526 ThreadToNativeFromVM ttnfv(thread); | |
| 1527 { | |
| 1528 env->RegisterNatives(unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); | |
| 1529 if (env->ExceptionOccurred()) { | |
| 1530 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1531 tty->print_cr("Warning: SDK 1.6 Unsafe.loadavg not found."); | |
| 1532 } | |
| 1533 env->ExceptionClear(); | |
| 1534 } | |
| 1535 } | |
| 1536 { | |
| 1537 env->RegisterNatives(unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); | |
| 1538 if (env->ExceptionOccurred()) { | |
| 1539 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1540 tty->print_cr("Warning: SDK 1.6 Unsafe.prefetchRead/Write not found."); | |
| 1541 } | |
| 1542 env->ExceptionClear(); | |
| 1543 } | |
| 1544 } | |
| 1545 { | |
| 1546 env->RegisterNatives(unsafecls, memcopy_methods, sizeof(memcopy_methods)/sizeof(JNINativeMethod)); | |
| 1547 if (env->ExceptionOccurred()) { | |
| 1548 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1549 tty->print_cr("Warning: SDK 1.7 Unsafe.copyMemory not found."); | |
| 1550 } | |
| 1551 env->ExceptionClear(); | |
| 1552 env->RegisterNatives(unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); | |
| 1553 if (env->ExceptionOccurred()) { | |
| 1554 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1555 tty->print_cr("Warning: SDK 1.5 Unsafe.copyMemory not found."); | |
| 1556 } | |
| 1557 env->ExceptionClear(); | |
| 1558 } | |
| 1559 } | |
| 1560 } | |
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1561 if (AnonymousClasses) { |
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1562 env->RegisterNatives(unsafecls, anonk_methods, sizeof(anonk_methods)/sizeof(JNINativeMethod)); |
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1563 if (env->ExceptionOccurred()) { |
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1564 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
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1565 tty->print_cr("Warning: SDK 1.7 Unsafe.defineClass (anonymous version) not found."); |
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1566 } |
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1567 env->ExceptionClear(); |
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1568 } |
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1569 } |
| 0 | 1570 int status = env->RegisterNatives(unsafecls, methods, sizeof(methods)/sizeof(JNINativeMethod)); |
| 1571 if (env->ExceptionOccurred()) { | |
| 1572 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1573 tty->print_cr("Warning: SDK 1.6 version of Unsafe not found."); | |
| 1574 } | |
| 1575 env->ExceptionClear(); | |
| 1576 // %%% For now, be backward compatible with an older class: | |
| 1577 status = env->RegisterNatives(unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); | |
| 1578 } | |
| 1579 if (env->ExceptionOccurred()) { | |
| 1580 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1581 tty->print_cr("Warning: SDK 1.5 version of Unsafe not found."); | |
| 1582 } | |
| 1583 env->ExceptionClear(); | |
| 1584 // %%% For now, be backward compatible with an older class: | |
| 1585 status = env->RegisterNatives(unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); | |
| 1586 } | |
| 1587 if (env->ExceptionOccurred()) { | |
| 1588 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 1589 tty->print_cr("Warning: SDK 1.4.1 version of Unsafe not found."); | |
| 1590 } | |
| 1591 env->ExceptionClear(); | |
| 1592 // %%% For now, be backward compatible with an older class: | |
| 1593 status = env->RegisterNatives(unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); | |
| 1594 } | |
| 1595 guarantee(status == 0, "register unsafe natives"); | |
| 1596 } | |
| 1597 JVM_END |