Mercurial > hg > truffle
annotate src/share/vm/prims/unsafe.cpp @ 14452:c6d7e7406136
8029101: PPC64 (part 211): ordering of Independent Reads of Independent Writes
Reviewed-by: dholmes, kvn
Contributed-by: martin.doerr@sap.com
| author | goetz |
|---|---|
| date | Thu, 16 Jan 2014 14:25:51 +0100 |
| parents | 190899198332 |
| children | 28f281e8de1d 62c54fcc0a35 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 10405 | 2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/vmSymbols.hpp" | |
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27 #include "utilities/macros.hpp" |
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28 #if INCLUDE_ALL_GCS |
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29 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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30 #endif // INCLUDE_ALL_GCS |
| 1972 | 31 #include "memory/allocation.inline.hpp" |
| 32 #include "prims/jni.h" | |
| 33 #include "prims/jvm.h" | |
| 34 #include "runtime/globals.hpp" | |
| 35 #include "runtime/interfaceSupport.hpp" | |
| 36 #include "runtime/reflection.hpp" | |
| 37 #include "runtime/synchronizer.hpp" | |
| 38 #include "services/threadService.hpp" | |
| 10405 | 39 #include "trace/tracing.hpp" |
| 1972 | 40 #include "utilities/copy.hpp" |
| 41 #include "utilities/dtrace.hpp" | |
| 42 | |
| 0 | 43 /* |
| 44 * Implementation of class sun.misc.Unsafe | |
| 45 */ | |
| 46 | |
| 4006 | 47 #ifndef USDT2 |
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48 HS_DTRACE_PROBE_DECL3(hotspot, thread__park__begin, uintptr_t, int, long long); |
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49 HS_DTRACE_PROBE_DECL1(hotspot, thread__park__end, uintptr_t); |
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50 HS_DTRACE_PROBE_DECL1(hotspot, thread__unpark, uintptr_t); |
| 4006 | 51 #endif /* !USDT2 */ |
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52 |
| 0 | 53 #define MAX_OBJECT_SIZE \ |
| 54 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ | |
| 55 + ((julong)max_jint * sizeof(double)) ) | |
| 56 | |
| 57 | |
| 58 #define UNSAFE_ENTRY(result_type, header) \ | |
| 59 JVM_ENTRY(result_type, header) | |
| 60 | |
| 61 // Can't use UNSAFE_LEAF because it has the signature of a straight | |
| 62 // call into the runtime (just like JVM_LEAF, funny that) but it's | |
| 63 // called like a Java Native and thus the wrapper built for it passes | |
| 64 // arguments like a JNI call. It expects those arguments to be popped | |
| 65 // from the stack on Intel like all good JNI args are, and adjusts the | |
| 66 // stack according. Since the JVM_LEAF call expects no extra | |
| 67 // arguments the stack isn't popped in the C code, is pushed by the | |
| 68 // wrapper and we get sick. | |
| 69 //#define UNSAFE_LEAF(result_type, header) \ | |
| 70 // JVM_LEAF(result_type, header) | |
| 71 | |
| 72 #define UNSAFE_END JVM_END | |
| 73 | |
| 74 #define UnsafeWrapper(arg) /*nothing, for the present*/ | |
| 75 | |
| 76 | |
| 77 inline void* addr_from_java(jlong addr) { | |
| 78 // This assert fails in a variety of ways on 32-bit systems. | |
| 79 // It is impossible to predict whether native code that converts | |
| 80 // pointers to longs will sign-extend or zero-extend the addresses. | |
| 81 //assert(addr == (uintptr_t)addr, "must not be odd high bits"); | |
| 82 return (void*)(uintptr_t)addr; | |
| 83 } | |
| 84 | |
| 85 inline jlong addr_to_java(void* p) { | |
| 86 assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); | |
| 87 return (uintptr_t)p; | |
| 88 } | |
| 89 | |
| 90 | |
| 91 // Note: The VM's obj_field and related accessors use byte-scaled | |
| 92 // ("unscaled") offsets, just as the unsafe methods do. | |
| 93 | |
| 94 // However, the method Unsafe.fieldOffset explicitly declines to | |
| 95 // guarantee this. The field offset values manipulated by the Java user | |
| 96 // through the Unsafe API are opaque cookies that just happen to be byte | |
| 97 // offsets. We represent this state of affairs by passing the cookies | |
| 98 // through conversion functions when going between the VM and the Unsafe API. | |
| 99 // The conversion functions just happen to be no-ops at present. | |
| 100 | |
| 101 inline jlong field_offset_to_byte_offset(jlong field_offset) { | |
| 102 return field_offset; | |
| 103 } | |
| 104 | |
| 105 inline jlong field_offset_from_byte_offset(jlong byte_offset) { | |
| 106 return byte_offset; | |
| 107 } | |
| 108 | |
| 109 inline jint invocation_key_from_method_slot(jint slot) { | |
| 110 return slot; | |
| 111 } | |
| 112 | |
| 113 inline jint invocation_key_to_method_slot(jint key) { | |
| 114 return key; | |
| 115 } | |
| 116 | |
| 117 inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { | |
| 118 jlong byte_offset = field_offset_to_byte_offset(field_offset); | |
| 119 #ifdef ASSERT | |
| 120 if (p != NULL) { | |
| 121 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
| 122 if (byte_offset == (jint)byte_offset) { | |
| 123 void* ptr_plus_disp = (address)p + byte_offset; | |
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124 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
| 0 | 125 "raw [ptr+disp] must be consistent with oop::field_base"); |
| 126 } | |
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127 jlong p_size = HeapWordSize * (jlong)(p->size()); |
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128 assert(byte_offset < p_size, err_msg("Unsafe access: offset " INT64_FORMAT " > object's size " INT64_FORMAT, byte_offset, p_size)); |
| 0 | 129 } |
| 130 #endif | |
| 131 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
| 132 return (address)p + (jint) byte_offset; | |
| 133 else | |
| 134 return (address)p + byte_offset; | |
| 135 } | |
| 136 | |
| 137 // Externally callable versions: | |
| 138 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
| 139 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
| 140 return field_offset; | |
| 141 } | |
| 142 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
| 143 return byte_offset; | |
| 144 } | |
| 145 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
| 146 return invocation_key_from_method_slot(slot); | |
| 147 } | |
| 148 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
| 149 return invocation_key_to_method_slot(key); | |
| 150 } | |
| 151 | |
| 152 | |
| 153 ///// Data in the Java heap. | |
| 154 | |
| 155 #define GET_FIELD(obj, offset, type_name, v) \ | |
| 156 oop p = JNIHandles::resolve(obj); \ | |
| 157 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
| 158 | |
| 159 #define SET_FIELD(obj, offset, type_name, x) \ | |
| 160 oop p = JNIHandles::resolve(obj); \ | |
| 161 *(type_name*)index_oop_from_field_offset_long(p, offset) = x | |
| 162 | |
| 163 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
| 164 oop p = JNIHandles::resolve(obj); \ | |
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165 if (support_IRIW_for_not_multiple_copy_atomic_cpu) { \ |
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166 OrderAccess::fence(); \ |
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167 } \ |
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168 volatile type_name v = OrderAccess::load_acquire((volatile type_name*)index_oop_from_field_offset_long(p, offset)); |
| 0 | 169 |
| 170 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
| 171 oop p = JNIHandles::resolve(obj); \ | |
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172 OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), x); |
| 0 | 173 |
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174 // Macros for oops that check UseCompressedOops |
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175 |
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176 #define GET_OOP_FIELD(obj, offset, v) \ |
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177 oop p = JNIHandles::resolve(obj); \ |
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178 oop v; \ |
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179 if (UseCompressedOops) { \ |
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180 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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181 v = oopDesc::decode_heap_oop(n); \ |
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182 } else { \ |
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183 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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184 } |
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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) |
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194 jobject ret = JNIHandles::make_local(env, v); |
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195 #if INCLUDE_ALL_GCS |
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196 // We could be accessing the referent field in a reference |
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197 // object. If G1 is enabled then we need to register a non-null |
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198 // referent with the SATB barrier. |
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199 if (UseG1GC) { |
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200 bool needs_barrier = false; |
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201 |
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202 if (ret != NULL) { |
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203 if (offset == java_lang_ref_Reference::referent_offset) { |
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204 oop o = JNIHandles::resolve_non_null(obj); |
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205 Klass* k = o->klass(); |
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206 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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207 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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208 needs_barrier = true; |
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209 } |
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210 } |
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211 } |
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212 |
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213 if (needs_barrier) { |
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214 oop referent = JNIHandles::resolve(ret); |
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215 G1SATBCardTableModRefBS::enqueue(referent); |
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216 } |
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217 } |
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218 #endif // INCLUDE_ALL_GCS |
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219 return ret; |
| 0 | 220 UNSAFE_END |
| 221 | |
| 222 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
| 223 UnsafeWrapper("Unsafe_SetObject"); | |
| 224 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
| 225 oop x = JNIHandles::resolve(x_h); | |
| 226 //SET_FIELD(obj, offset, oop, x); | |
| 227 oop p = JNIHandles::resolve(obj); | |
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228 if (UseCompressedOops) { |
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229 if (x != NULL) { |
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230 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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231 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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232 } else { |
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233 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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234 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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235 } |
| 0 | 236 } else { |
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237 if (x != NULL) { |
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238 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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239 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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240 } else { |
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241 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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242 } |
| 0 | 243 } |
| 244 UNSAFE_END | |
| 245 | |
| 246 // The normal variants allow a null base pointer with an arbitrary address. | |
| 247 // But if the base pointer is non-null, the offset should make some sense. | |
| 248 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
| 249 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 250 UnsafeWrapper("Unsafe_GetObject"); | |
|
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251 GET_OOP_FIELD(obj, offset, v) |
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252 jobject ret = JNIHandles::make_local(env, v); |
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253 #if INCLUDE_ALL_GCS |
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254 // We could be accessing the referent field in a reference |
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255 // object. If G1 is enabled then we need to register non-null |
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256 // referent with the SATB barrier. |
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257 if (UseG1GC) { |
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258 bool needs_barrier = false; |
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259 |
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260 if (ret != NULL) { |
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261 if (offset == java_lang_ref_Reference::referent_offset && obj != NULL) { |
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262 oop o = JNIHandles::resolve(obj); |
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263 Klass* k = o->klass(); |
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264 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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265 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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266 needs_barrier = true; |
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267 } |
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268 } |
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269 } |
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270 |
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271 if (needs_barrier) { |
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272 oop referent = JNIHandles::resolve(ret); |
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273 G1SATBCardTableModRefBS::enqueue(referent); |
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274 } |
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275 } |
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276 #endif // INCLUDE_ALL_GCS |
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277 return ret; |
| 0 | 278 UNSAFE_END |
| 279 | |
| 280 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 281 UnsafeWrapper("Unsafe_SetObject"); | |
| 282 oop x = JNIHandles::resolve(x_h); | |
| 283 oop p = JNIHandles::resolve(obj); | |
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284 if (UseCompressedOops) { |
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285 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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286 } else { |
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287 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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288 } |
| 0 | 289 UNSAFE_END |
| 290 | |
| 291 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 292 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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293 oop p = JNIHandles::resolve(obj); |
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294 void* addr = index_oop_from_field_offset_long(p, offset); |
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295 volatile oop v; |
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296 if (UseCompressedOops) { |
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297 volatile narrowOop n = *(volatile narrowOop*) addr; |
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298 (void)const_cast<oop&>(v = oopDesc::decode_heap_oop(n)); |
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299 } else { |
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300 (void)const_cast<oop&>(v = *(volatile oop*) addr); |
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301 } |
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302 OrderAccess::acquire(); |
| 0 | 303 return JNIHandles::make_local(env, v); |
| 304 UNSAFE_END | |
| 305 | |
| 306 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 307 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
| 308 oop x = JNIHandles::resolve(x_h); | |
| 309 oop p = JNIHandles::resolve(obj); | |
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310 void* addr = index_oop_from_field_offset_long(p, offset); |
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311 OrderAccess::release(); |
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312 if (UseCompressedOops) { |
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313 oop_store((narrowOop*)addr, x); |
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314 } else { |
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315 oop_store((oop*)addr, x); |
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316 } |
| 0 | 317 OrderAccess::fence(); |
| 318 UNSAFE_END | |
| 319 | |
| 10235 | 320 #ifndef SUPPORTS_NATIVE_CX8 |
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321 // Keep old code for platforms which may not have atomic jlong (8 bytes) instructions |
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322 |
| 0 | 323 // Volatile long versions must use locks if !VM_Version::supports_cx8(). |
| 324 // support_cx8 is a surrogate for 'supports atomic long memory ops'. | |
| 325 | |
| 326 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 327 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
| 328 { | |
| 329 if (VM_Version::supports_cx8()) { | |
| 330 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
| 331 return v; | |
| 332 } | |
| 333 else { | |
| 334 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 335 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 336 ObjectLocker ol(p, THREAD); | |
| 337 jlong value = *addr; | |
| 338 return value; | |
| 339 } | |
| 340 } | |
| 341 UNSAFE_END | |
| 342 | |
| 343 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
| 344 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
| 345 { | |
| 346 if (VM_Version::supports_cx8()) { | |
| 347 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
| 348 } | |
| 349 else { | |
| 350 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 351 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 352 ObjectLocker ol(p, THREAD); | |
| 353 *addr = x; | |
| 354 } | |
| 355 } | |
| 356 UNSAFE_END | |
| 357 | |
| 10235 | 358 #endif // not SUPPORTS_NATIVE_CX8 |
| 0 | 359 |
| 360 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
| 361 \ | |
| 362 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
| 363 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 364 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
| 365 GET_FIELD(obj, offset, jboolean, v); \ | |
| 366 return v; \ | |
| 367 UNSAFE_END \ | |
| 368 \ | |
| 369 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
| 370 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 371 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
| 372 SET_FIELD(obj, offset, jboolean, x); \ | |
| 373 UNSAFE_END \ | |
| 374 \ | |
| 375 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
| 376 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 377 GET_FIELD(obj, offset, jboolean, v); \ | |
| 378 return v; \ | |
| 379 UNSAFE_END \ | |
| 380 \ | |
| 381 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
| 382 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 383 SET_FIELD(obj, offset, jboolean, x); \ | |
| 384 UNSAFE_END \ | |
| 385 \ | |
| 386 // END DEFINE_GETSETOOP. | |
| 387 | |
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388 DEFINE_GETSETOOP(jboolean, Boolean) |
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389 DEFINE_GETSETOOP(jbyte, Byte) |
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390 DEFINE_GETSETOOP(jshort, Short); |
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391 DEFINE_GETSETOOP(jchar, Char); |
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392 DEFINE_GETSETOOP(jint, Int); |
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393 DEFINE_GETSETOOP(jlong, Long); |
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394 DEFINE_GETSETOOP(jfloat, Float); |
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395 DEFINE_GETSETOOP(jdouble, Double); |
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396 |
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397 #undef DEFINE_GETSETOOP |
| 0 | 398 |
| 399 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
| 400 \ | |
| 401 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
| 402 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 403 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
| 404 return v; \ | |
| 405 UNSAFE_END \ | |
| 406 \ | |
| 407 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
| 408 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 409 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
| 410 UNSAFE_END \ | |
| 411 \ | |
| 412 // END DEFINE_GETSETOOP_VOLATILE. | |
| 413 | |
| 414 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
| 415 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
| 416 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
| 417 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
| 418 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
| 419 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
| 420 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
| 421 | |
| 10235 | 422 #ifdef SUPPORTS_NATIVE_CX8 |
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423 DEFINE_GETSETOOP_VOLATILE(jlong, Long); |
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424 #endif |
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425 |
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426 #undef DEFINE_GETSETOOP_VOLATILE |
| 0 | 427 |
| 428 // The non-intrinsified versions of setOrdered just use setVolatile | |
| 429 | |
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430 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) |
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431 UnsafeWrapper("Unsafe_SetOrderedInt"); |
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432 SET_FIELD_VOLATILE(obj, offset, jint, x); |
| 0 | 433 UNSAFE_END |
| 434 | |
| 435 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 436 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
| 437 oop x = JNIHandles::resolve(x_h); | |
| 438 oop p = JNIHandles::resolve(obj); | |
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439 void* addr = index_oop_from_field_offset_long(p, offset); |
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440 OrderAccess::release(); |
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441 if (UseCompressedOops) { |
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442 oop_store((narrowOop*)addr, x); |
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443 } else { |
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444 oop_store((oop*)addr, x); |
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445 } |
| 0 | 446 OrderAccess::fence(); |
| 447 UNSAFE_END | |
| 448 | |
| 449 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
| 450 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
| 10235 | 451 #ifdef SUPPORTS_NATIVE_CX8 |
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452 SET_FIELD_VOLATILE(obj, offset, jlong, x); |
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453 #else |
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454 // Keep old code for platforms which may not have atomic long (8 bytes) instructions |
| 0 | 455 { |
| 456 if (VM_Version::supports_cx8()) { | |
| 457 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
| 458 } | |
| 459 else { | |
| 460 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 461 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 462 ObjectLocker ol(p, THREAD); | |
| 463 *addr = x; | |
| 464 } | |
| 465 } | |
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466 #endif |
| 0 | 467 UNSAFE_END |
| 468 | |
| 7425 | 469 UNSAFE_ENTRY(void, Unsafe_LoadFence(JNIEnv *env, jobject unsafe)) |
| 470 UnsafeWrapper("Unsafe_LoadFence"); | |
| 471 OrderAccess::acquire(); | |
| 472 UNSAFE_END | |
| 473 | |
| 474 UNSAFE_ENTRY(void, Unsafe_StoreFence(JNIEnv *env, jobject unsafe)) | |
| 475 UnsafeWrapper("Unsafe_StoreFence"); | |
| 476 OrderAccess::release(); | |
| 477 UNSAFE_END | |
| 478 | |
| 479 UNSAFE_ENTRY(void, Unsafe_FullFence(JNIEnv *env, jobject unsafe)) | |
| 480 UnsafeWrapper("Unsafe_FullFence"); | |
| 481 OrderAccess::fence(); | |
| 482 UNSAFE_END | |
| 483 | |
| 0 | 484 ////// Data in the C heap. |
| 485 | |
| 486 // Note: These do not throw NullPointerException for bad pointers. | |
| 487 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
| 488 // | |
| 489 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
| 490 \ | |
| 491 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
| 492 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
| 493 void* p = addr_from_java(addr); \ | |
| 494 JavaThread* t = JavaThread::current(); \ | |
| 495 t->set_doing_unsafe_access(true); \ | |
| 496 java_type x = *(volatile native_type*)p; \ | |
| 497 t->set_doing_unsafe_access(false); \ | |
| 498 return x; \ | |
| 499 UNSAFE_END \ | |
| 500 \ | |
| 501 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
| 502 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
| 503 JavaThread* t = JavaThread::current(); \ | |
| 504 t->set_doing_unsafe_access(true); \ | |
| 505 void* p = addr_from_java(addr); \ | |
| 506 *(volatile native_type*)p = x; \ | |
| 507 t->set_doing_unsafe_access(false); \ | |
| 508 UNSAFE_END \ | |
| 509 \ | |
| 510 // END DEFINE_GETSETNATIVE. | |
| 511 | |
| 512 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
| 513 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
| 514 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
| 515 DEFINE_GETSETNATIVE(jint, Int, jint); | |
| 516 // no long -- handled specially | |
| 517 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
| 518 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
| 519 | |
| 520 #undef DEFINE_GETSETNATIVE | |
| 521 | |
| 522 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 523 UnsafeWrapper("Unsafe_GetNativeLong"); | |
| 524 JavaThread* t = JavaThread::current(); | |
| 525 // We do it this way to avoid problems with access to heap using 64 | |
| 526 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
| 527 // some CPUs (SPARC) it leads to SIGBUS. | |
| 528 t->set_doing_unsafe_access(true); | |
| 529 void* p = addr_from_java(addr); | |
| 530 jlong x; | |
| 531 if (((intptr_t)p & 7) == 0) { | |
| 532 // jlong is aligned, do a volatile access | |
| 533 x = *(volatile jlong*)p; | |
| 534 } else { | |
| 535 jlong_accessor acc; | |
| 536 acc.words[0] = ((volatile jint*)p)[0]; | |
| 537 acc.words[1] = ((volatile jint*)p)[1]; | |
| 538 x = acc.long_value; | |
| 539 } | |
| 540 t->set_doing_unsafe_access(false); | |
| 541 return x; | |
| 542 UNSAFE_END | |
| 543 | |
| 544 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
| 545 UnsafeWrapper("Unsafe_SetNativeLong"); | |
| 546 JavaThread* t = JavaThread::current(); | |
| 547 // see comment for Unsafe_GetNativeLong | |
| 548 t->set_doing_unsafe_access(true); | |
| 549 void* p = addr_from_java(addr); | |
| 550 if (((intptr_t)p & 7) == 0) { | |
| 551 // jlong is aligned, do a volatile access | |
| 552 *(volatile jlong*)p = x; | |
| 553 } else { | |
| 554 jlong_accessor acc; | |
| 555 acc.long_value = x; | |
| 556 ((volatile jint*)p)[0] = acc.words[0]; | |
| 557 ((volatile jint*)p)[1] = acc.words[1]; | |
| 558 } | |
| 559 t->set_doing_unsafe_access(false); | |
| 560 UNSAFE_END | |
| 561 | |
| 562 | |
| 563 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 564 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
| 565 void* p = addr_from_java(addr); | |
| 566 return addr_to_java(*(void**)p); | |
| 567 UNSAFE_END | |
| 568 | |
| 569 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
| 570 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
| 571 void* p = addr_from_java(addr); | |
| 572 *(void**)p = addr_from_java(x); | |
| 573 UNSAFE_END | |
| 574 | |
| 575 | |
| 576 ////// Allocation requests | |
| 577 | |
| 578 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
| 579 UnsafeWrapper("Unsafe_AllocateInstance"); | |
| 580 { | |
| 581 ThreadToNativeFromVM ttnfv(thread); | |
| 582 return env->AllocObject(cls); | |
| 583 } | |
| 584 UNSAFE_END | |
| 585 | |
| 586 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
| 587 UnsafeWrapper("Unsafe_AllocateMemory"); | |
| 588 size_t sz = (size_t)size; | |
| 589 if (sz != (julong)size || size < 0) { | |
| 590 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 591 } | |
| 592 if (sz == 0) { | |
| 593 return 0; | |
| 594 } | |
| 595 sz = round_to(sz, HeapWordSize); | |
| 6197 | 596 void* x = os::malloc(sz, mtInternal); |
| 0 | 597 if (x == NULL) { |
| 598 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
| 599 } | |
| 600 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
| 601 return addr_to_java(x); | |
| 602 UNSAFE_END | |
| 603 | |
| 604 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
| 605 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
| 606 void* p = addr_from_java(addr); | |
| 607 size_t sz = (size_t)size; | |
| 608 if (sz != (julong)size || size < 0) { | |
| 609 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 610 } | |
| 611 if (sz == 0) { | |
| 612 os::free(p); | |
| 613 return 0; | |
| 614 } | |
| 615 sz = round_to(sz, HeapWordSize); | |
| 6197 | 616 void* x = (p == NULL) ? os::malloc(sz, mtInternal) : os::realloc(p, sz, mtInternal); |
| 0 | 617 if (x == NULL) { |
| 618 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
| 619 } | |
| 620 return addr_to_java(x); | |
| 621 UNSAFE_END | |
| 622 | |
| 623 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 624 UnsafeWrapper("Unsafe_FreeMemory"); | |
| 625 void* p = addr_from_java(addr); | |
| 626 if (p == NULL) { | |
| 627 return; | |
| 628 } | |
| 629 os::free(p); | |
| 630 UNSAFE_END | |
| 631 | |
| 632 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
| 633 UnsafeWrapper("Unsafe_SetMemory"); | |
| 634 size_t sz = (size_t)size; | |
| 635 if (sz != (julong)size || size < 0) { | |
| 636 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 637 } | |
| 638 char* p = (char*) addr_from_java(addr); | |
| 639 Copy::fill_to_memory_atomic(p, sz, value); | |
| 640 UNSAFE_END | |
| 641 | |
| 642 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
| 643 UnsafeWrapper("Unsafe_SetMemory"); | |
| 644 size_t sz = (size_t)size; | |
| 645 if (sz != (julong)size || size < 0) { | |
| 646 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 647 } | |
| 648 oop base = JNIHandles::resolve(obj); | |
| 649 void* p = index_oop_from_field_offset_long(base, offset); | |
| 650 Copy::fill_to_memory_atomic(p, sz, value); | |
| 651 UNSAFE_END | |
| 652 | |
| 653 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
| 654 UnsafeWrapper("Unsafe_CopyMemory"); | |
| 655 if (size == 0) { | |
| 656 return; | |
| 657 } | |
| 658 size_t sz = (size_t)size; | |
| 659 if (sz != (julong)size || size < 0) { | |
| 660 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 661 } | |
| 662 void* src = addr_from_java(srcAddr); | |
| 663 void* dst = addr_from_java(dstAddr); | |
| 664 Copy::conjoint_memory_atomic(src, dst, sz); | |
| 665 UNSAFE_END | |
| 666 | |
| 667 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
| 668 UnsafeWrapper("Unsafe_CopyMemory"); | |
| 669 if (size == 0) { | |
| 670 return; | |
| 671 } | |
| 672 size_t sz = (size_t)size; | |
| 673 if (sz != (julong)size || size < 0) { | |
| 674 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 675 } | |
| 676 oop srcp = JNIHandles::resolve(srcObj); | |
| 677 oop dstp = JNIHandles::resolve(dstObj); | |
| 678 if (dstp != NULL && !dstp->is_typeArray()) { | |
| 679 // NYI: This works only for non-oop arrays at present. | |
| 680 // Generalizing it would be reasonable, but requires card marking. | |
| 681 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
| 682 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 683 } | |
| 684 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
| 685 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
| 686 Copy::conjoint_memory_atomic(src, dst, sz); | |
| 687 UNSAFE_END | |
| 688 | |
| 689 | |
| 690 ////// Random queries | |
| 691 | |
| 692 // See comment at file start about UNSAFE_LEAF | |
| 693 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
| 694 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
| 695 UnsafeWrapper("Unsafe_AddressSize"); | |
| 696 return sizeof(void*); | |
| 697 UNSAFE_END | |
| 698 | |
| 699 // See comment at file start about UNSAFE_LEAF | |
| 700 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
| 701 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
| 702 UnsafeWrapper("Unsafe_PageSize"); | |
| 703 return os::vm_page_size(); | |
| 704 UNSAFE_END | |
| 705 | |
| 706 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
| 707 if (field == NULL) { | |
| 708 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 709 } | |
| 710 | |
| 711 oop reflected = JNIHandles::resolve_non_null(field); | |
| 712 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
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713 Klass* k = java_lang_Class::as_Klass(mirror); |
| 0 | 714 int slot = java_lang_reflect_Field::slot(reflected); |
| 715 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
| 716 | |
| 717 if (must_be_static >= 0) { | |
| 718 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
| 719 if (must_be_static != really_is_static) { | |
| 720 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 721 } | |
| 722 } | |
| 723 | |
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724 int offset = InstanceKlass::cast(k)->field_offset(slot); |
| 0 | 725 return field_offset_from_byte_offset(offset); |
| 726 } | |
| 727 | |
| 728 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 729 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
| 730 return find_field_offset(field, 0, THREAD); | |
| 731 UNSAFE_END | |
| 732 | |
| 733 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 734 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
| 735 return find_field_offset(field, 1, THREAD); | |
| 736 UNSAFE_END | |
| 737 | |
| 738 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
| 739 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
| 740 // Note: In this VM implementation, a field address is always a short | |
| 741 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
| 742 // range of the return type is never used. However, some implementations | |
| 743 // might put the static field inside an array shared by many classes, | |
| 744 // or even at a fixed address, in which case the address could be quite | |
| 745 // large. In that last case, this function would return NULL, since | |
| 746 // the address would operate alone, without any base pointer. | |
| 747 | |
| 748 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 749 | |
| 750 oop reflected = JNIHandles::resolve_non_null(field); | |
| 751 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
| 752 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
| 753 | |
| 754 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
| 755 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 756 } | |
| 757 | |
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758 return JNIHandles::make_local(env, mirror); |
| 0 | 759 UNSAFE_END |
| 760 | |
| 761 //@deprecated | |
| 762 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 763 UnsafeWrapper("Unsafe_FieldOffset"); | |
| 764 // tries (but fails) to be polymorphic between static and non-static: | |
| 765 jlong offset = find_field_offset(field, -1, THREAD); | |
| 766 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
| 767 return (jint)offset; | |
| 768 UNSAFE_END | |
| 769 | |
| 770 //@deprecated | |
| 771 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
| 772 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
| 773 if (clazz == NULL) { | |
| 774 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 775 } | |
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776 return JNIHandles::make_local(env, JNIHandles::resolve_non_null(clazz)); |
| 0 | 777 UNSAFE_END |
| 778 | |
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779 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
| 0 | 780 UnsafeWrapper("Unsafe_EnsureClassInitialized"); |
| 781 if (clazz == NULL) { | |
| 782 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 783 } | |
| 784 oop mirror = JNIHandles::resolve_non_null(clazz); | |
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785 |
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786 Klass* klass = java_lang_Class::as_Klass(mirror); |
| 6983 | 787 if (klass != NULL && klass->should_be_initialized()) { |
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788 InstanceKlass* k = InstanceKlass::cast(klass); |
| 0 | 789 k->initialize(CHECK); |
| 790 } | |
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791 } |
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792 UNSAFE_END |
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793 |
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794 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
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795 UnsafeWrapper("Unsafe_ShouldBeInitialized"); |
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796 if (clazz == NULL) { |
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797 THROW_(vmSymbols::java_lang_NullPointerException(), false); |
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798 } |
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799 oop mirror = JNIHandles::resolve_non_null(clazz); |
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800 Klass* klass = java_lang_Class::as_Klass(mirror); |
| 6983 | 801 if (klass != NULL && klass->should_be_initialized()) { |
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802 return true; |
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803 } |
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804 return false; |
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805 } |
| 0 | 806 UNSAFE_END |
| 807 | |
| 808 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
| 809 if (acls == NULL) { | |
| 810 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 811 } | |
| 812 oop mirror = JNIHandles::resolve_non_null(acls); | |
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813 Klass* k = java_lang_Class::as_Klass(mirror); |
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814 if (k == NULL || !k->oop_is_array()) { |
| 0 | 815 THROW(vmSymbols::java_lang_InvalidClassException()); |
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816 } else if (k->oop_is_objArray()) { |
| 0 | 817 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); |
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818 scale = heapOopSize; |
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819 } else if (k->oop_is_typeArray()) { |
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820 TypeArrayKlass* tak = TypeArrayKlass::cast(k); |
| 0 | 821 base = tak->array_header_in_bytes(); |
| 822 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
| 823 scale = (1 << tak->log2_element_size()); | |
| 824 } else { | |
| 825 ShouldNotReachHere(); | |
| 826 } | |
| 827 } | |
| 828 | |
| 829 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
| 830 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
| 831 int base, scale; | |
| 832 getBaseAndScale(base, scale, acls, CHECK_0); | |
| 833 return field_offset_from_byte_offset(base); | |
| 834 UNSAFE_END | |
| 835 | |
| 836 | |
| 837 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
| 838 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
| 839 int base, scale; | |
| 840 getBaseAndScale(base, scale, acls, CHECK_0); | |
| 841 // This VM packs both fields and array elements down to the byte. | |
| 842 // But watch out: If this changes, so that array references for | |
| 843 // a given primitive type (say, T_BOOLEAN) use different memory units | |
| 844 // than fields, this method MUST return zero for such arrays. | |
| 845 // For example, the VM used to store sub-word sized fields in full | |
| 846 // words in the object layout, so that accessors like getByte(Object,int) | |
| 847 // did not really do what one might expect for arrays. Therefore, | |
| 848 // this function used to report a zero scale factor, so that the user | |
| 849 // would know not to attempt to access sub-word array elements. | |
| 850 // // Code for unpacked fields: | |
| 851 // if (scale < wordSize) return 0; | |
| 852 | |
| 853 // The following allows for a pretty general fieldOffset cookie scheme, | |
| 854 // but requires it to be linear in byte offset. | |
| 855 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
| 856 UNSAFE_END | |
| 857 | |
| 858 | |
| 859 static inline void throw_new(JNIEnv *env, const char *ename) { | |
| 860 char buf[100]; | |
| 861 strcpy(buf, "java/lang/"); | |
| 862 strcat(buf, ename); | |
| 863 jclass cls = env->FindClass(buf); | |
| 864 char* msg = NULL; | |
| 865 env->ThrowNew(cls, msg); | |
| 866 } | |
| 867 | |
|
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868 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { |
| 0 | 869 { |
| 870 // Code lifted from JDK 1.3 ClassLoader.c | |
| 871 | |
| 872 jbyte *body; | |
| 873 char *utfName; | |
| 874 jclass result = 0; | |
| 875 char buf[128]; | |
| 876 | |
| 877 if (UsePerfData) { | |
| 878 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
| 879 } | |
| 880 | |
| 881 if (data == NULL) { | |
| 882 throw_new(env, "NullPointerException"); | |
| 883 return 0; | |
| 884 } | |
| 885 | |
| 886 /* Work around 4153825. malloc crashes on Solaris when passed a | |
| 887 * negative size. | |
| 888 */ | |
| 889 if (length < 0) { | |
| 890 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
| 891 return 0; | |
| 892 } | |
| 893 | |
| 6197 | 894 body = NEW_C_HEAP_ARRAY(jbyte, length, mtInternal); |
| 0 | 895 |
| 896 if (body == 0) { | |
| 897 throw_new(env, "OutOfMemoryError"); | |
| 898 return 0; | |
| 899 } | |
| 900 | |
| 901 env->GetByteArrayRegion(data, offset, length, body); | |
| 902 | |
| 903 if (env->ExceptionOccurred()) | |
| 904 goto free_body; | |
| 905 | |
| 906 if (name != NULL) { | |
| 907 uint len = env->GetStringUTFLength(name); | |
| 908 int unicode_len = env->GetStringLength(name); | |
| 909 if (len >= sizeof(buf)) { | |
| 6197 | 910 utfName = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); |
| 0 | 911 if (utfName == NULL) { |
| 912 throw_new(env, "OutOfMemoryError"); | |
| 913 goto free_body; | |
| 914 } | |
| 915 } else { | |
| 916 utfName = buf; | |
| 917 } | |
| 918 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
| 919 //VerifyFixClassname(utfName); | |
| 920 for (uint i = 0; i < len; i++) { | |
| 921 if (utfName[i] == '.') utfName[i] = '/'; | |
| 922 } | |
| 923 } else { | |
| 924 utfName = NULL; | |
| 925 } | |
| 926 | |
| 927 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
| 928 | |
| 929 if (utfName && utfName != buf) | |
| 6197 | 930 FREE_C_HEAP_ARRAY(char, utfName, mtInternal); |
| 0 | 931 |
| 932 free_body: | |
| 6197 | 933 FREE_C_HEAP_ARRAY(jbyte, body, mtInternal); |
| 0 | 934 return result; |
| 935 } | |
| 936 } | |
| 937 | |
| 938 | |
|
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939 UNSAFE_ENTRY(jclass, Unsafe_DefineClass(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd)) |
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940 UnsafeWrapper("Unsafe_DefineClass"); |
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941 { |
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942 ThreadToNativeFromVM ttnfv(thread); |
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943 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
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944 } |
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945 UNSAFE_END |
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946 |
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947 |
| 0 | 948 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) |
| 949 UnsafeWrapper("Unsafe_DefineClass"); | |
| 950 { | |
| 951 ThreadToNativeFromVM ttnfv(thread); | |
| 952 | |
| 953 int depthFromDefineClass0 = 1; | |
| 954 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
| 955 jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller); | |
| 956 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); | |
| 957 | |
|
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958 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
| 0 | 959 } |
| 960 UNSAFE_END | |
| 961 | |
| 962 | |
|
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963 #define DAC_Args CLS"[B["OBJ |
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964 // define a class but do not make it known to the class loader or system dictionary |
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965 // - host_class: supplies context for linkage, access control, protection domain, and class loader |
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966 // - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
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967 // - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
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968 |
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969 // When you load an anonymous class U, it works as if you changed its name just before loading, |
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970 // to a name that you will never use again. Since the name is lost, no other class can directly |
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971 // link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
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972 // through java.lang.Class methods like Class.newInstance. |
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973 |
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974 // Access checks for linkage sites within U continue to follow the same rules as for named classes. |
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975 // The package of an anonymous class is given by the package qualifier on the name under which it was loaded. |
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976 // An anonymous class also has special privileges to access any member of its host class. |
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977 // This is the main reason why this loading operation is unsafe. The purpose of this is to |
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978 // allow language implementations to simulate "open classes"; a host class in effect gets |
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979 // new code when an anonymous class is loaded alongside it. A less convenient but more |
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980 // standard way to do this is with reflection, which can also be set to ignore access |
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981 // restrictions. |
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982 |
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983 // Access into an anonymous class is possible only through reflection. Therefore, there |
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984 // are no special access rules for calling into an anonymous class. The relaxed access |
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985 // rule for the host class is applied in the opposite direction: A host class reflectively |
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986 // access one of its anonymous classes. |
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987 |
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988 // If you load the same bytecodes twice, you get two different classes. You can reload |
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989 // the same bytecodes with or without varying CP patches. |
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990 |
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991 // By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
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992 // The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
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993 // The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
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994 |
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995 // This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
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996 // an outer class (so that U2 is an anonymous inner class of anonymous U1). |
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997 // It is not possible for a named class, or an older anonymous class, to refer by |
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998 // name (via its CP) to a newer anonymous class. |
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999 |
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1000 // CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
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1001 // or type descriptors used in the loaded anonymous class. |
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1002 |
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1003 // Finally, CP patching may be used to introduce "live" objects into the constant pool, |
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1004 // instead of "dead" strings. A compiled statement like println((Object)"hello") can |
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1005 // be changed to println(greeting), where greeting is an arbitrary object created before |
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1006 // the anonymous class is loaded. This is useful in dynamic languages, in which |
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1007 // various kinds of metaobjects must be introduced as constants into bytecode. |
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1008 // Note the cast (Object), which tells the verifier to expect an arbitrary object, |
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1009 // not just a literal string. For such ldc instructions, the verifier uses the |
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1010 // type Object instead of String, if the loaded constant is not in fact a String. |
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1011 |
|
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1012 static instanceKlassHandle |
|
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1013 Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
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1014 jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
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1015 HeapWord* *temp_alloc, |
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1016 TRAPS) { |
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1017 |
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1018 if (UsePerfData) { |
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1019 ClassLoader::unsafe_defineClassCallCounter()->inc(); |
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1020 } |
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1021 |
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1022 if (data == NULL) { |
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1023 THROW_0(vmSymbols::java_lang_NullPointerException()); |
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1024 } |
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1025 |
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1026 jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
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1027 jint word_length = (length + sizeof(HeapWord)-1) / sizeof(HeapWord); |
| 6197 | 1028 HeapWord* body = NEW_C_HEAP_ARRAY(HeapWord, word_length, mtInternal); |
|
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1029 if (body == NULL) { |
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1030 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
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1031 } |
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1032 |
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1033 // caller responsible to free it: |
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1034 (*temp_alloc) = body; |
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1035 |
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1036 { |
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1037 jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
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1038 Copy::conjoint_words((HeapWord*) array_base, body, word_length); |
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1039 } |
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1040 |
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1041 u1* class_bytes = (u1*) body; |
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1042 int class_bytes_length = (int) length; |
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1043 if (class_bytes_length < 0) class_bytes_length = 0; |
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1044 if (class_bytes == NULL |
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1045 || host_class == NULL |
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1046 || length != class_bytes_length) |
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1047 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1048 |
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1049 objArrayHandle cp_patches_h; |
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1050 if (cp_patches_jh != NULL) { |
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1051 oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
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1052 if (!p->is_objArray()) |
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1053 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1054 cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
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1055 } |
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1056 |
|
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1057 KlassHandle host_klass(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(host_class))); |
|
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1058 const char* host_source = host_klass->external_name(); |
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1059 Handle host_loader(THREAD, host_klass->class_loader()); |
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1060 Handle host_domain(THREAD, host_klass->protection_domain()); |
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1061 |
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1062 GrowableArray<Handle>* cp_patches = NULL; |
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1063 if (cp_patches_h.not_null()) { |
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1064 int alen = cp_patches_h->length(); |
|
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1065 for (int i = alen-1; i >= 0; i--) { |
|
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1066 oop p = cp_patches_h->obj_at(i); |
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1067 if (p != NULL) { |
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1068 Handle patch(THREAD, p); |
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1069 if (cp_patches == NULL) |
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1070 cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
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1071 cp_patches->at_put(i, patch); |
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1072 } |
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1073 } |
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1074 } |
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1075 |
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1076 ClassFileStream st(class_bytes, class_bytes_length, (char*) host_source); |
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1077 |
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1078 instanceKlassHandle anon_klass; |
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1079 { |
|
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1080 Symbol* no_class_name = NULL; |
|
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1081 Klass* anonk = SystemDictionary::parse_stream(no_class_name, |
|
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1082 host_loader, host_domain, |
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1083 &st, host_klass, cp_patches, |
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1084 CHECK_NULL); |
|
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1085 if (anonk == NULL) return NULL; |
|
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1086 anon_klass = instanceKlassHandle(THREAD, anonk); |
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1087 } |
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1088 |
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1089 return anon_klass; |
|
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1090 } |
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1091 |
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1092 UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) |
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1093 { |
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1094 instanceKlassHandle anon_klass; |
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1095 jobject res_jh = NULL; |
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1096 |
|
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1097 UnsafeWrapper("Unsafe_DefineAnonymousClass"); |
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1098 ResourceMark rm(THREAD); |
|
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1099 |
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1100 HeapWord* temp_alloc = NULL; |
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1101 |
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1102 anon_klass = Unsafe_DefineAnonymousClass_impl(env, host_class, data, |
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1103 cp_patches_jh, |
|
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1104 &temp_alloc, THREAD); |
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1105 if (anon_klass() != NULL) |
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1106 res_jh = JNIHandles::make_local(env, anon_klass->java_mirror()); |
|
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1107 |
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1108 // try/finally clause: |
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1109 if (temp_alloc != NULL) { |
| 6197 | 1110 FREE_C_HEAP_ARRAY(HeapWord, temp_alloc, mtInternal); |
|
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1111 } |
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1112 |
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1113 // The anonymous class loader data has been artificially been kept alive to |
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1114 // this point. The mirror and any instances of this class have to keep |
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1115 // it alive afterwards. |
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1116 if (anon_klass() != NULL) { |
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1117 anon_klass->class_loader_data()->set_keep_alive(false); |
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1118 } |
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1119 |
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1120 // let caller initialize it as needed... |
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1121 |
|
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1122 return (jclass) res_jh; |
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1123 } |
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1124 UNSAFE_END |
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1125 |
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1126 |
| 0 | 1127 |
| 1128 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1129 UnsafeWrapper("Unsafe_MonitorEnter"); | |
| 1130 { | |
| 1131 if (jobj == NULL) { | |
| 1132 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1133 } | |
| 1134 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
| 1135 ObjectSynchronizer::jni_enter(obj, CHECK); | |
| 1136 } | |
| 1137 UNSAFE_END | |
| 1138 | |
| 1139 | |
| 1140 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1141 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
| 1142 { | |
| 1143 if (jobj == NULL) { | |
| 1144 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
| 1145 } | |
| 1146 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
| 1147 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
| 1148 return (res ? JNI_TRUE : JNI_FALSE); | |
| 1149 } | |
| 1150 UNSAFE_END | |
| 1151 | |
| 1152 | |
| 1153 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1154 UnsafeWrapper("Unsafe_MonitorExit"); | |
| 1155 { | |
| 1156 if (jobj == NULL) { | |
| 1157 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1158 } | |
| 1159 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
| 1160 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
| 1161 } | |
| 1162 UNSAFE_END | |
| 1163 | |
| 1164 | |
| 1165 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
| 1166 UnsafeWrapper("Unsafe_ThrowException"); | |
| 1167 { | |
| 1168 ThreadToNativeFromVM ttnfv(thread); | |
| 1169 env->Throw(thr); | |
| 1170 } | |
| 1171 UNSAFE_END | |
| 1172 | |
| 1173 // JSR166 ------------------------------------------------------------------ | |
| 1174 | |
| 1175 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
| 1176 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
| 1177 oop x = JNIHandles::resolve(x_h); | |
| 1178 oop e = JNIHandles::resolve(e_h); | |
| 1179 oop p = JNIHandles::resolve(obj); | |
|
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1180 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
|
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1181 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e, true); |
|
113
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1182 jboolean success = (res == e); |
| 0 | 1183 if (success) |
|
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1184 update_barrier_set((void*)addr, x); |
| 0 | 1185 return success; |
| 1186 UNSAFE_END | |
| 1187 | |
| 1188 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
| 1189 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
| 1190 oop p = JNIHandles::resolve(obj); | |
| 1191 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
| 1192 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
| 1193 UNSAFE_END | |
| 1194 | |
| 1195 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
| 1196 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
| 1197 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 1198 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 1199 if (VM_Version::supports_cx8()) | |
| 1200 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
| 1201 else { | |
| 1202 jboolean success = false; | |
| 1203 ObjectLocker ol(p, THREAD); | |
| 1204 if (*addr == e) { *addr = x; success = true; } | |
| 1205 return success; | |
| 1206 } | |
| 1207 UNSAFE_END | |
| 1208 | |
| 1209 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
| 1210 UnsafeWrapper("Unsafe_Park"); | |
| 10405 | 1211 EventThreadPark event; |
| 4006 | 1212 #ifndef USDT2 |
|
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1213 HS_DTRACE_PROBE3(hotspot, thread__park__begin, thread->parker(), (int) isAbsolute, time); |
| 4006 | 1214 #else /* USDT2 */ |
| 1215 HOTSPOT_THREAD_PARK_BEGIN( | |
| 1216 (uintptr_t) thread->parker(), (int) isAbsolute, time); | |
| 1217 #endif /* USDT2 */ | |
| 0 | 1218 JavaThreadParkedState jtps(thread, time != 0); |
| 1219 thread->parker()->park(isAbsolute != 0, time); | |
| 4006 | 1220 #ifndef USDT2 |
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1221 HS_DTRACE_PROBE1(hotspot, thread__park__end, thread->parker()); |
| 4006 | 1222 #else /* USDT2 */ |
| 1223 HOTSPOT_THREAD_PARK_END( | |
| 1224 (uintptr_t) thread->parker()); | |
| 1225 #endif /* USDT2 */ | |
| 10405 | 1226 if (event.should_commit()) { |
| 1227 oop obj = thread->current_park_blocker(); | |
|
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1228 event.set_klass((obj != NULL) ? obj->klass() : NULL); |
| 10405 | 1229 event.set_timeout(time); |
|
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1230 event.set_address((obj != NULL) ? (TYPE_ADDRESS) cast_from_oop<uintptr_t>(obj) : 0); |
| 10405 | 1231 event.commit(); |
| 1232 } | |
| 0 | 1233 UNSAFE_END |
| 1234 | |
| 1235 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
| 1236 UnsafeWrapper("Unsafe_Unpark"); | |
| 1237 Parker* p = NULL; | |
| 1238 if (jthread != NULL) { | |
| 1239 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
| 1240 if (java_thread != NULL) { | |
| 1241 jlong lp = java_lang_Thread::park_event(java_thread); | |
| 1242 if (lp != 0) { | |
| 1243 // This cast is OK even though the jlong might have been read | |
| 1244 // non-atomically on 32bit systems, since there, one word will | |
| 1245 // always be zero anyway and the value set is always the same | |
| 1246 p = (Parker*)addr_from_java(lp); | |
| 1247 } else { | |
| 1248 // Grab lock if apparently null or using older version of library | |
| 1249 MutexLocker mu(Threads_lock); | |
| 1250 java_thread = JNIHandles::resolve_non_null(jthread); | |
| 1251 if (java_thread != NULL) { | |
| 1252 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
| 1253 if (thr != NULL) { | |
| 1254 p = thr->parker(); | |
| 1255 if (p != NULL) { // Bind to Java thread for next time. | |
| 1256 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
| 1257 } | |
| 1258 } | |
| 1259 } | |
| 1260 } | |
| 1261 } | |
| 1262 } | |
| 1263 if (p != NULL) { | |
| 4006 | 1264 #ifndef USDT2 |
|
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1265 HS_DTRACE_PROBE1(hotspot, thread__unpark, p); |
| 4006 | 1266 #else /* USDT2 */ |
| 1267 HOTSPOT_THREAD_UNPARK( | |
| 1268 (uintptr_t) p); | |
| 1269 #endif /* USDT2 */ | |
| 0 | 1270 p->unpark(); |
| 1271 } | |
| 1272 UNSAFE_END | |
| 1273 | |
| 1274 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
| 1275 UnsafeWrapper("Unsafe_Loadavg"); | |
| 1276 const int max_nelem = 3; | |
| 1277 double la[max_nelem]; | |
| 1278 jint ret; | |
| 1279 | |
| 1280 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
| 1281 assert(a->is_typeArray(), "must be type array"); | |
| 1282 | |
| 1283 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
| 1284 ThreadToNativeFromVM ttnfv(thread); | |
| 1285 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
| 1286 return -1; | |
| 1287 } | |
| 1288 | |
| 1289 ret = os::loadavg(la, nelem); | |
| 1290 if (ret == -1) return -1; | |
| 1291 | |
| 1292 // if successful, ret is the number of samples actually retrieved. | |
| 1293 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
| 1294 switch(ret) { | |
| 1295 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
| 1296 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
| 1297 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
| 1298 } | |
| 1299 return ret; | |
| 1300 UNSAFE_END | |
| 1301 | |
| 1302 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
| 1303 UnsafeWrapper("Unsafe_PrefetchRead"); | |
| 1304 oop p = JNIHandles::resolve(obj); | |
| 1305 void* addr = index_oop_from_field_offset_long(p, 0); | |
| 1306 Prefetch::read(addr, (intx)offset); | |
| 1307 UNSAFE_END | |
| 1308 | |
| 1309 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
| 1310 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
| 1311 oop p = JNIHandles::resolve(obj); | |
| 1312 void* addr = index_oop_from_field_offset_long(p, 0); | |
| 1313 Prefetch::write(addr, (intx)offset); | |
| 1314 UNSAFE_END | |
| 1315 | |
| 1316 | |
| 1317 /// JVM_RegisterUnsafeMethods | |
| 1318 | |
| 1319 #define ADR "J" | |
| 1320 | |
| 1321 #define LANG "Ljava/lang/" | |
| 1322 | |
| 1323 #define OBJ LANG"Object;" | |
| 1324 #define CLS LANG"Class;" | |
| 1325 #define CTR LANG"reflect/Constructor;" | |
| 1326 #define FLD LANG"reflect/Field;" | |
| 1327 #define MTH LANG"reflect/Method;" | |
| 1328 #define THR LANG"Throwable;" | |
| 1329 | |
| 1330 #define DC0_Args LANG"String;[BII" | |
|
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1331 #define DC_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" |
| 0 | 1332 |
| 1333 #define CC (char*) /*cast a literal from (const char*)*/ | |
| 1334 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
| 1335 | |
| 1336 // define deprecated accessors for compabitility with 1.4.0 | |
| 1337 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
| 1338 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
| 1339 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
| 1340 | |
| 1341 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
| 1342 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
| 1343 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
| 1344 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
| 1345 | |
| 1346 // Note: In 1.5.0, there are volatile versions too | |
| 1347 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
| 1348 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
| 1349 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
| 1350 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
| 1351 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
| 1352 | |
| 1353 | |
| 1354 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
| 1355 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
| 1356 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
| 1357 | |
| 1358 | |
| 1359 | |
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1360 // These are the methods for 1.4.0 |
| 0 | 1361 static JNINativeMethod methods_140[] = { |
| 1362 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
| 1363 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
| 1364 | |
| 1365 DECLARE_GETSETOOP_140(Boolean, Z), | |
| 1366 DECLARE_GETSETOOP_140(Byte, B), | |
| 1367 DECLARE_GETSETOOP_140(Short, S), | |
| 1368 DECLARE_GETSETOOP_140(Char, C), | |
| 1369 DECLARE_GETSETOOP_140(Int, I), | |
| 1370 DECLARE_GETSETOOP_140(Long, J), | |
| 1371 DECLARE_GETSETOOP_140(Float, F), | |
| 1372 DECLARE_GETSETOOP_140(Double, D), | |
| 1373 | |
| 1374 DECLARE_GETSETNATIVE(Byte, B), | |
| 1375 DECLARE_GETSETNATIVE(Short, S), | |
| 1376 DECLARE_GETSETNATIVE(Char, C), | |
| 1377 DECLARE_GETSETNATIVE(Int, I), | |
| 1378 DECLARE_GETSETNATIVE(Long, J), | |
| 1379 DECLARE_GETSETNATIVE(Float, F), | |
| 1380 DECLARE_GETSETNATIVE(Double, D), | |
| 1381 | |
| 1382 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1383 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1384 | |
| 1385 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1386 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1387 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1388 | |
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1389 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, |
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1390 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, |
| 0 | 1391 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
| 1392 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1393 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1394 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1395 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1396 | |
| 1397 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1398 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
| 0 | 1399 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
| 1400 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1401 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1402 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
| 1403 }; | |
| 1404 | |
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1405 // These are the methods prior to the JSR 166 changes in 1.5.0 |
| 0 | 1406 static JNINativeMethod methods_141[] = { |
| 1407 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
| 1408 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1409 | |
| 1410 DECLARE_GETSETOOP_141(Boolean, Z), | |
| 1411 DECLARE_GETSETOOP_141(Byte, B), | |
| 1412 DECLARE_GETSETOOP_141(Short, S), | |
| 1413 DECLARE_GETSETOOP_141(Char, C), | |
| 1414 DECLARE_GETSETOOP_141(Int, I), | |
| 1415 DECLARE_GETSETOOP_141(Long, J), | |
| 1416 DECLARE_GETSETOOP_141(Float, F), | |
| 1417 DECLARE_GETSETOOP_141(Double, D), | |
| 1418 | |
| 1419 DECLARE_GETSETNATIVE(Byte, B), | |
| 1420 DECLARE_GETSETNATIVE(Short, S), | |
| 1421 DECLARE_GETSETNATIVE(Char, C), | |
| 1422 DECLARE_GETSETNATIVE(Int, I), | |
| 1423 DECLARE_GETSETNATIVE(Long, J), | |
| 1424 DECLARE_GETSETNATIVE(Float, F), | |
| 1425 DECLARE_GETSETNATIVE(Double, D), | |
| 1426 | |
| 1427 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1428 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1429 | |
| 1430 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1431 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1432 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1433 | |
| 1434 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1435 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1436 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1437 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1438 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1439 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1440 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1441 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1442 | |
| 1443 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1444 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
| 0 | 1445 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
| 1446 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1447 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1448 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
| 1449 | |
| 1450 }; | |
| 1451 | |
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1452 // These are the methods prior to the JSR 166 changes in 1.6.0 |
| 0 | 1453 static JNINativeMethod methods_15[] = { |
| 1454 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
| 1455 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1456 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
| 1457 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
| 1458 | |
| 1459 | |
| 1460 DECLARE_GETSETOOP(Boolean, Z), | |
| 1461 DECLARE_GETSETOOP(Byte, B), | |
| 1462 DECLARE_GETSETOOP(Short, S), | |
| 1463 DECLARE_GETSETOOP(Char, C), | |
| 1464 DECLARE_GETSETOOP(Int, I), | |
| 1465 DECLARE_GETSETOOP(Long, J), | |
| 1466 DECLARE_GETSETOOP(Float, F), | |
| 1467 DECLARE_GETSETOOP(Double, D), | |
| 1468 | |
| 1469 DECLARE_GETSETNATIVE(Byte, B), | |
| 1470 DECLARE_GETSETNATIVE(Short, S), | |
| 1471 DECLARE_GETSETNATIVE(Char, C), | |
| 1472 DECLARE_GETSETNATIVE(Int, I), | |
| 1473 DECLARE_GETSETNATIVE(Long, J), | |
| 1474 DECLARE_GETSETNATIVE(Float, F), | |
| 1475 DECLARE_GETSETNATIVE(Double, D), | |
| 1476 | |
| 1477 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1478 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1479 | |
| 1480 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1481 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1482 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1483 | |
| 1484 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1485 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1486 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1487 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1488 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1489 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1490 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1491 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1492 | |
| 1493 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1494 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
| 0 | 1495 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
| 1496 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1497 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1498 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
| 1499 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
| 1500 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
| 1501 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
| 1502 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
| 1503 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
| 1504 | |
| 1505 }; | |
| 1506 | |
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1507 // These are the methods for 1.6.0 and 1.7.0 |
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1508 static JNINativeMethod methods_16[] = { |
| 0 | 1509 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
| 1510 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1511 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
| 1512 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
| 1513 | |
|
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1514 DECLARE_GETSETOOP(Boolean, Z), |
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1515 DECLARE_GETSETOOP(Byte, B), |
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1516 DECLARE_GETSETOOP(Short, S), |
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1517 DECLARE_GETSETOOP(Char, C), |
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1518 DECLARE_GETSETOOP(Int, I), |
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1519 DECLARE_GETSETOOP(Long, J), |
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1520 DECLARE_GETSETOOP(Float, F), |
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1521 DECLARE_GETSETOOP(Double, D), |
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1522 |
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1523 DECLARE_GETSETNATIVE(Byte, B), |
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1524 DECLARE_GETSETNATIVE(Short, S), |
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1525 DECLARE_GETSETNATIVE(Char, C), |
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1526 DECLARE_GETSETNATIVE(Int, I), |
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1527 DECLARE_GETSETNATIVE(Long, J), |
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1528 DECLARE_GETSETNATIVE(Float, F), |
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1529 DECLARE_GETSETNATIVE(Double, D), |
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1530 |
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1531 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, |
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1532 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, |
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1533 |
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1534 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, |
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1535 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, |
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1536 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, |
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1537 |
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1538 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, |
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1539 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, |
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1540 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, |
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1541 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
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1542 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, |
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1543 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, |
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1544 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, |
|
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1545 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, |
|
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1546 |
|
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1547 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, |
|
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1548 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
|
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1549 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
|
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1550 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, |
|
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1551 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, |
|
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1552 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, |
|
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1553 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, |
|
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1554 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, |
|
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1555 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, |
|
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1556 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, |
|
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1557 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, |
|
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1558 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, |
|
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1559 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, |
|
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1560 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, |
|
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1561 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} |
|
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1562 }; |
|
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1563 |
|
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1564 // These are the methods for 1.8.0 |
|
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1565 static JNINativeMethod methods_18[] = { |
|
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1566 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
|
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1567 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, |
|
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1568 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, |
|
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1569 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, |
| 0 | 1570 |
| 1571 DECLARE_GETSETOOP(Boolean, Z), | |
| 1572 DECLARE_GETSETOOP(Byte, B), | |
| 1573 DECLARE_GETSETOOP(Short, S), | |
| 1574 DECLARE_GETSETOOP(Char, C), | |
| 1575 DECLARE_GETSETOOP(Int, I), | |
| 1576 DECLARE_GETSETOOP(Long, J), | |
| 1577 DECLARE_GETSETOOP(Float, F), | |
| 1578 DECLARE_GETSETOOP(Double, D), | |
| 1579 | |
| 1580 DECLARE_GETSETNATIVE(Byte, B), | |
| 1581 DECLARE_GETSETNATIVE(Short, S), | |
| 1582 DECLARE_GETSETNATIVE(Char, C), | |
| 1583 DECLARE_GETSETNATIVE(Int, I), | |
| 1584 DECLARE_GETSETNATIVE(Long, J), | |
| 1585 DECLARE_GETSETNATIVE(Float, F), | |
| 1586 DECLARE_GETSETNATIVE(Double, D), | |
| 1587 | |
| 1588 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1589 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1590 | |
| 1591 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1592 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1593 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1594 | |
| 1595 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1596 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1597 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1598 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1599 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1600 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1601 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1602 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1603 | |
|
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1604 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
| 0 | 1605 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
| 1606 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1607 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1608 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
| 1609 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
| 1610 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
| 1611 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
| 1612 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
| 1613 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
| 1614 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
| 1615 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
| 1616 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
| 1617 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
| 1618 }; | |
| 1619 | |
| 1620 JNINativeMethod loadavg_method[] = { | |
|
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1621 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} |
| 0 | 1622 }; |
| 1623 | |
| 1624 JNINativeMethod prefetch_methods[] = { | |
| 1625 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
| 1626 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
| 1627 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
| 1628 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
| 1629 }; | |
| 1630 | |
|
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1631 JNINativeMethod memcopy_methods_17[] = { |
| 0 | 1632 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, |
| 1633 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
| 1634 }; | |
| 1635 | |
| 1636 JNINativeMethod memcopy_methods_15[] = { | |
| 1637 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
| 1638 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
| 1639 }; | |
| 1640 | |
|
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1641 JNINativeMethod anonk_methods[] = { |
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1642 {CC"defineAnonymousClass", CC"("DAC_Args")"CLS, FN_PTR(Unsafe_DefineAnonymousClass)}, |
|
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1643 }; |
| 0 | 1644 |
|
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1645 JNINativeMethod lform_methods[] = { |
|
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1646 {CC"shouldBeInitialized",CC"("CLS")Z", FN_PTR(Unsafe_ShouldBeInitialized)}, |
|
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1647 }; |
|
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1648 |
|
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1649 JNINativeMethod fence_methods[] = { |
|
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1650 {CC"loadFence", CC"()V", FN_PTR(Unsafe_LoadFence)}, |
|
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1651 {CC"storeFence", CC"()V", FN_PTR(Unsafe_StoreFence)}, |
|
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1652 {CC"fullFence", CC"()V", FN_PTR(Unsafe_FullFence)}, |
|
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1653 }; |
|
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1654 |
| 0 | 1655 #undef CC |
| 1656 #undef FN_PTR | |
| 1657 | |
| 1658 #undef ADR | |
| 1659 #undef LANG | |
| 1660 #undef OBJ | |
| 1661 #undef CLS | |
| 1662 #undef CTR | |
| 1663 #undef FLD | |
| 1664 #undef MTH | |
| 1665 #undef THR | |
| 1666 #undef DC0_Args | |
|
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1667 #undef DC_Args |
| 0 | 1668 |
| 1669 #undef DECLARE_GETSETOOP | |
| 1670 #undef DECLARE_GETSETNATIVE | |
| 1671 | |
| 1672 | |
|
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|
1673 /** |
|
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1674 * Helper method to register native methods. |
|
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1675 */ |
|
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1676 static bool register_natives(const char* message, JNIEnv* env, jclass clazz, const JNINativeMethod* methods, jint nMethods) { |
|
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1677 int status = env->RegisterNatives(clazz, methods, nMethods); |
|
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1678 if (status < 0 || env->ExceptionOccurred()) { |
|
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1679 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
|
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1680 tty->print_cr("Unsafe: failed registering %s", message); |
|
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|
1681 } |
|
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|
1682 env->ExceptionClear(); |
|
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|
1683 return false; |
|
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|
1684 } else { |
|
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1685 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
|
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1686 tty->print_cr("Unsafe: successfully registered %s", message); |
|
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|
1687 } |
|
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|
1688 return true; |
|
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|
1689 } |
|
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|
1690 } |
|
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|
1691 |
|
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1692 |
| 0 | 1693 // This one function is exported, used by NativeLookup. |
| 1694 // The Unsafe_xxx functions above are called only from the interpreter. | |
| 1695 // The optimizer looks at names and signatures to recognize | |
| 1696 // individual functions. | |
| 1697 | |
| 1698 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
| 1699 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
| 1700 { | |
| 1701 ThreadToNativeFromVM ttnfv(thread); | |
|
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1702 |
|
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1703 // Unsafe methods |
| 0 | 1704 { |
|
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1705 bool success = false; |
|
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1706 // We need to register the 1.6 methods first because the 1.8 methods would register fine on 1.7 and 1.6 |
|
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1707 if (!success) { |
|
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1708 success = register_natives("1.6 methods", env, unsafecls, methods_16, sizeof(methods_16)/sizeof(JNINativeMethod)); |
|
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1709 } |
|
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1710 if (!success) { |
|
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1711 success = register_natives("1.8 methods", env, unsafecls, methods_18, sizeof(methods_18)/sizeof(JNINativeMethod)); |
|
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1712 } |
|
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|
1713 if (!success) { |
|
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1714 success = register_natives("1.5 methods", env, unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); |
|
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1715 } |
|
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1716 if (!success) { |
|
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1717 success = register_natives("1.4.1 methods", env, unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); |
| 0 | 1718 } |
|
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1719 if (!success) { |
|
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1720 success = register_natives("1.4.0 methods", env, unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); |
|
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1721 } |
|
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1722 guarantee(success, "register unsafe natives"); |
| 0 | 1723 } |
|
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1724 |
|
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1725 // Unsafe.getLoadAverage |
|
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1726 register_natives("1.6 loadavg method", env, unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); |
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1727 |
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1728 // Prefetch methods |
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1729 register_natives("1.6 prefetch methods", env, unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); |
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1730 |
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1731 // Memory copy methods |
| 0 | 1732 { |
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1733 bool success = false; |
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1734 if (!success) { |
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1735 success = register_natives("1.7 memory copy methods", env, unsafecls, memcopy_methods_17, sizeof(memcopy_methods_17)/sizeof(JNINativeMethod)); |
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1736 } |
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1737 if (!success) { |
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1738 success = register_natives("1.5 memory copy methods", env, unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); |
| 0 | 1739 } |
| 1740 } | |
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1741 |
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1742 // Unsafe.defineAnonymousClass |
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1743 if (EnableInvokeDynamic) { |
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1744 register_natives("1.7 define anonymous class method", env, unsafecls, anonk_methods, sizeof(anonk_methods)/sizeof(JNINativeMethod)); |
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1745 } |
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1746 |
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1747 // Unsafe.shouldBeInitialized |
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1748 if (EnableInvokeDynamic) { |
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1749 register_natives("1.7 LambdaForm support", env, unsafecls, lform_methods, sizeof(lform_methods)/sizeof(JNINativeMethod)); |
| 0 | 1750 } |
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1751 |
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1752 // Fence methods |
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1753 register_natives("1.8 fence methods", env, unsafecls, fence_methods, sizeof(fence_methods)/sizeof(JNINativeMethod)); |
| 0 | 1754 } |
| 1755 JVM_END |