Mercurial > hg > graal-jvmci-8
annotate src/share/vm/prims/unsafe.cpp @ 23842:d109bda16490
Merge
| author | asaha |
|---|---|
| date | Tue, 05 Apr 2016 08:55:39 -0700 |
| parents | 626f594dffa6 32b682649973 |
| children | f13e777eb255 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 23614 | 2 * Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/vmSymbols.hpp" | |
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27 #include "utilities/macros.hpp" |
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28 #if INCLUDE_ALL_GCS |
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29 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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30 #endif // INCLUDE_ALL_GCS |
| 1972 | 31 #include "memory/allocation.inline.hpp" |
| 32 #include "prims/jni.h" | |
| 33 #include "prims/jvm.h" | |
| 34 #include "runtime/globals.hpp" | |
| 35 #include "runtime/interfaceSupport.hpp" | |
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36 #include "runtime/prefetch.inline.hpp" |
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37 #include "runtime/orderAccess.inline.hpp" |
| 1972 | 38 #include "runtime/reflection.hpp" |
| 39 #include "runtime/synchronizer.hpp" | |
| 40 #include "services/threadService.hpp" | |
| 10405 | 41 #include "trace/tracing.hpp" |
| 1972 | 42 #include "utilities/copy.hpp" |
| 43 #include "utilities/dtrace.hpp" | |
| 44 | |
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45 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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46 |
| 0 | 47 /* |
| 48 * Implementation of class sun.misc.Unsafe | |
| 49 */ | |
| 50 | |
| 4006 | 51 #ifndef USDT2 |
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52 HS_DTRACE_PROBE_DECL3(hotspot, thread__park__begin, uintptr_t, int, long long); |
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53 HS_DTRACE_PROBE_DECL1(hotspot, thread__park__end, uintptr_t); |
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54 HS_DTRACE_PROBE_DECL1(hotspot, thread__unpark, uintptr_t); |
| 4006 | 55 #endif /* !USDT2 */ |
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56 |
| 0 | 57 #define MAX_OBJECT_SIZE \ |
| 58 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ | |
| 59 + ((julong)max_jint * sizeof(double)) ) | |
| 60 | |
| 61 | |
| 62 #define UNSAFE_ENTRY(result_type, header) \ | |
| 63 JVM_ENTRY(result_type, header) | |
| 64 | |
| 65 // Can't use UNSAFE_LEAF because it has the signature of a straight | |
| 66 // call into the runtime (just like JVM_LEAF, funny that) but it's | |
| 67 // called like a Java Native and thus the wrapper built for it passes | |
| 68 // arguments like a JNI call. It expects those arguments to be popped | |
| 69 // from the stack on Intel like all good JNI args are, and adjusts the | |
| 70 // stack according. Since the JVM_LEAF call expects no extra | |
| 71 // arguments the stack isn't popped in the C code, is pushed by the | |
| 72 // wrapper and we get sick. | |
| 73 //#define UNSAFE_LEAF(result_type, header) \ | |
| 74 // JVM_LEAF(result_type, header) | |
| 75 | |
| 76 #define UNSAFE_END JVM_END | |
| 77 | |
| 78 #define UnsafeWrapper(arg) /*nothing, for the present*/ | |
| 79 | |
| 80 | |
| 81 inline void* addr_from_java(jlong addr) { | |
| 82 // This assert fails in a variety of ways on 32-bit systems. | |
| 83 // It is impossible to predict whether native code that converts | |
| 84 // pointers to longs will sign-extend or zero-extend the addresses. | |
| 85 //assert(addr == (uintptr_t)addr, "must not be odd high bits"); | |
| 86 return (void*)(uintptr_t)addr; | |
| 87 } | |
| 88 | |
| 89 inline jlong addr_to_java(void* p) { | |
| 90 assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); | |
| 91 return (uintptr_t)p; | |
| 92 } | |
| 93 | |
| 94 | |
| 95 // Note: The VM's obj_field and related accessors use byte-scaled | |
| 96 // ("unscaled") offsets, just as the unsafe methods do. | |
| 97 | |
| 98 // However, the method Unsafe.fieldOffset explicitly declines to | |
| 99 // guarantee this. The field offset values manipulated by the Java user | |
| 100 // through the Unsafe API are opaque cookies that just happen to be byte | |
| 101 // offsets. We represent this state of affairs by passing the cookies | |
| 102 // through conversion functions when going between the VM and the Unsafe API. | |
| 103 // The conversion functions just happen to be no-ops at present. | |
| 104 | |
| 105 inline jlong field_offset_to_byte_offset(jlong field_offset) { | |
| 106 return field_offset; | |
| 107 } | |
| 108 | |
| 109 inline jlong field_offset_from_byte_offset(jlong byte_offset) { | |
| 110 return byte_offset; | |
| 111 } | |
| 112 | |
| 113 inline jint invocation_key_from_method_slot(jint slot) { | |
| 114 return slot; | |
| 115 } | |
| 116 | |
| 117 inline jint invocation_key_to_method_slot(jint key) { | |
| 118 return key; | |
| 119 } | |
| 120 | |
| 121 inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { | |
| 122 jlong byte_offset = field_offset_to_byte_offset(field_offset); | |
| 123 #ifdef ASSERT | |
| 124 if (p != NULL) { | |
| 125 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
| 126 if (byte_offset == (jint)byte_offset) { | |
| 127 void* ptr_plus_disp = (address)p + byte_offset; | |
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128 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
| 0 | 129 "raw [ptr+disp] must be consistent with oop::field_base"); |
| 130 } | |
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131 jlong p_size = HeapWordSize * (jlong)(p->size()); |
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132 assert(byte_offset < p_size, err_msg("Unsafe access: offset " INT64_FORMAT " > object's size " INT64_FORMAT, byte_offset, p_size)); |
| 0 | 133 } |
| 134 #endif | |
| 135 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
| 136 return (address)p + (jint) byte_offset; | |
| 137 else | |
| 138 return (address)p + byte_offset; | |
| 139 } | |
| 140 | |
| 141 // Externally callable versions: | |
| 142 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
| 143 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
| 144 return field_offset; | |
| 145 } | |
| 146 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
| 147 return byte_offset; | |
| 148 } | |
| 149 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
| 150 return invocation_key_from_method_slot(slot); | |
| 151 } | |
| 152 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
| 153 return invocation_key_to_method_slot(key); | |
| 154 } | |
| 155 | |
| 156 | |
| 157 ///// Data in the Java heap. | |
| 158 | |
| 23614 | 159 #define truncate_jboolean(x) ((x) & 1) |
| 160 #define truncate_jbyte(x) (x) | |
| 161 #define truncate_jshort(x) (x) | |
| 162 #define truncate_jchar(x) (x) | |
| 163 #define truncate_jint(x) (x) | |
| 164 #define truncate_jlong(x) (x) | |
| 165 #define truncate_jfloat(x) (x) | |
| 166 #define truncate_jdouble(x) (x) | |
| 167 | |
| 0 | 168 #define GET_FIELD(obj, offset, type_name, v) \ |
| 169 oop p = JNIHandles::resolve(obj); \ | |
| 170 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
| 171 | |
| 172 #define SET_FIELD(obj, offset, type_name, x) \ | |
| 173 oop p = JNIHandles::resolve(obj); \ | |
| 23614 | 174 *(type_name*)index_oop_from_field_offset_long(p, offset) = truncate_##type_name(x) |
| 0 | 175 |
| 176 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
| 177 oop p = JNIHandles::resolve(obj); \ | |
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178 if (support_IRIW_for_not_multiple_copy_atomic_cpu) { \ |
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179 OrderAccess::fence(); \ |
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180 } \ |
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181 volatile type_name v = OrderAccess::load_acquire((volatile type_name*)index_oop_from_field_offset_long(p, offset)); |
| 0 | 182 |
| 183 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
| 184 oop p = JNIHandles::resolve(obj); \ | |
| 23614 | 185 OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), truncate_##type_name(x)); |
| 0 | 186 |
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187 // Macros for oops that check UseCompressedOops |
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188 |
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189 #define GET_OOP_FIELD(obj, offset, v) \ |
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190 oop p = JNIHandles::resolve(obj); \ |
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191 oop v; \ |
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192 if (UseCompressedOops) { \ |
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193 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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194 v = oopDesc::decode_heap_oop(n); \ |
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195 } else { \ |
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196 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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197 } |
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198 |
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199 |
| 0 | 200 // Get/SetObject must be special-cased, since it works with handles. |
| 201 | |
| 202 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
| 203 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
| 204 UnsafeWrapper("Unsafe_GetObject"); | |
| 205 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
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206 GET_OOP_FIELD(obj, offset, v) |
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207 jobject ret = JNIHandles::make_local(env, v); |
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208 #if INCLUDE_ALL_GCS |
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209 // We could be accessing the referent field in a reference |
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210 // object. If G1 is enabled then we need to register a non-null |
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211 // referent with the SATB barrier. |
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212 if (UseG1GC) { |
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213 bool needs_barrier = false; |
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214 |
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215 if (ret != NULL) { |
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216 if (offset == java_lang_ref_Reference::referent_offset) { |
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217 oop o = JNIHandles::resolve_non_null(obj); |
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218 Klass* k = o->klass(); |
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219 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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220 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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221 needs_barrier = true; |
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222 } |
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223 } |
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224 } |
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225 |
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226 if (needs_barrier) { |
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227 oop referent = JNIHandles::resolve(ret); |
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228 G1SATBCardTableModRefBS::enqueue(referent); |
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229 } |
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230 } |
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231 #endif // INCLUDE_ALL_GCS |
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232 return ret; |
| 0 | 233 UNSAFE_END |
| 234 | |
| 235 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
| 236 UnsafeWrapper("Unsafe_SetObject"); | |
| 237 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
| 238 oop x = JNIHandles::resolve(x_h); | |
| 239 //SET_FIELD(obj, offset, oop, x); | |
| 240 oop p = JNIHandles::resolve(obj); | |
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241 if (UseCompressedOops) { |
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242 if (x != NULL) { |
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243 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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244 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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245 } else { |
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246 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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247 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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248 } |
| 0 | 249 } else { |
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250 if (x != NULL) { |
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251 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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252 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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253 } else { |
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254 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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255 } |
| 0 | 256 } |
| 257 UNSAFE_END | |
| 258 | |
| 259 // The normal variants allow a null base pointer with an arbitrary address. | |
| 260 // But if the base pointer is non-null, the offset should make some sense. | |
| 261 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
| 262 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 263 UnsafeWrapper("Unsafe_GetObject"); | |
|
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264 GET_OOP_FIELD(obj, offset, v) |
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265 jobject ret = JNIHandles::make_local(env, v); |
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266 #if INCLUDE_ALL_GCS |
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267 // We could be accessing the referent field in a reference |
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268 // object. If G1 is enabled then we need to register non-null |
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269 // referent with the SATB barrier. |
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270 if (UseG1GC) { |
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271 bool needs_barrier = false; |
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272 |
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273 if (ret != NULL) { |
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274 if (offset == java_lang_ref_Reference::referent_offset && obj != NULL) { |
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275 oop o = JNIHandles::resolve(obj); |
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276 Klass* k = o->klass(); |
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277 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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278 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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279 needs_barrier = true; |
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280 } |
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281 } |
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282 } |
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283 |
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284 if (needs_barrier) { |
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285 oop referent = JNIHandles::resolve(ret); |
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286 G1SATBCardTableModRefBS::enqueue(referent); |
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287 } |
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288 } |
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289 #endif // INCLUDE_ALL_GCS |
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290 return ret; |
| 0 | 291 UNSAFE_END |
| 292 | |
| 293 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 294 UnsafeWrapper("Unsafe_SetObject"); | |
| 295 oop x = JNIHandles::resolve(x_h); | |
| 296 oop p = JNIHandles::resolve(obj); | |
|
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297 if (UseCompressedOops) { |
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298 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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299 } else { |
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300 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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301 } |
| 0 | 302 UNSAFE_END |
| 303 | |
| 304 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 305 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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306 oop p = JNIHandles::resolve(obj); |
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307 void* addr = index_oop_from_field_offset_long(p, offset); |
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308 volatile oop v; |
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309 if (UseCompressedOops) { |
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310 volatile narrowOop n = *(volatile narrowOop*) addr; |
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311 (void)const_cast<oop&>(v = oopDesc::decode_heap_oop(n)); |
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312 } else { |
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313 (void)const_cast<oop&>(v = *(volatile oop*) addr); |
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314 } |
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315 OrderAccess::acquire(); |
| 0 | 316 return JNIHandles::make_local(env, v); |
| 317 UNSAFE_END | |
| 318 | |
| 319 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 320 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
| 321 oop x = JNIHandles::resolve(x_h); | |
| 322 oop p = JNIHandles::resolve(obj); | |
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323 void* addr = index_oop_from_field_offset_long(p, offset); |
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324 OrderAccess::release(); |
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325 if (UseCompressedOops) { |
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326 oop_store((narrowOop*)addr, x); |
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327 } else { |
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328 oop_store((oop*)addr, x); |
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329 } |
| 0 | 330 OrderAccess::fence(); |
| 331 UNSAFE_END | |
| 332 | |
| 10235 | 333 #ifndef SUPPORTS_NATIVE_CX8 |
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334 |
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335 // VM_Version::supports_cx8() is a surrogate for 'supports atomic long memory ops'. |
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336 // |
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337 // On platforms which do not support atomic compare-and-swap of jlong (8 byte) |
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338 // values we have to use a lock-based scheme to enforce atomicity. This has to be |
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339 // applied to all Unsafe operations that set the value of a jlong field. Even so |
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340 // the compareAndSwapLong operation will not be atomic with respect to direct stores |
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341 // to the field from Java code. It is important therefore that any Java code that |
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342 // utilizes these Unsafe jlong operations does not perform direct stores. To permit |
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343 // direct loads of the field from Java code we must also use Atomic::store within the |
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344 // locked regions. And for good measure, in case there are direct stores, we also |
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345 // employ Atomic::load within those regions. Note that the field in question must be |
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346 // volatile and so must have atomic load/store accesses applied at the Java level. |
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347 // |
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348 // The locking scheme could utilize a range of strategies for controlling the locking |
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349 // granularity: from a lock per-field through to a single global lock. The latter is |
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350 // the simplest and is used for the current implementation. Note that the Java object |
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351 // that contains the field, can not, in general, be used for locking. To do so can lead |
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352 // to deadlocks as we may introduce locking into what appears to the Java code to be a |
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353 // lock-free path. |
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354 // |
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355 // As all the locked-regions are very short and themselves non-blocking we can treat |
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356 // them as leaf routines and elide safepoint checks (ie we don't perform any thread |
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357 // state transitions even when blocking for the lock). Note that if we do choose to |
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358 // add safepoint checks and thread state transitions, we must ensure that we calculate |
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359 // the address of the field _after_ we have acquired the lock, else the object may have |
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360 // been moved by the GC |
| 0 | 361 |
| 362 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 363 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
| 364 { | |
| 365 if (VM_Version::supports_cx8()) { | |
| 366 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
| 367 return v; | |
| 368 } | |
| 369 else { | |
| 370 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 371 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
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372 MutexLockerEx mu(UnsafeJlong_lock, Mutex::_no_safepoint_check_flag); |
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373 jlong value = Atomic::load(addr); |
| 0 | 374 return value; |
| 375 } | |
| 376 } | |
| 377 UNSAFE_END | |
| 378 | |
| 379 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
| 380 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
| 381 { | |
| 382 if (VM_Version::supports_cx8()) { | |
| 383 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
| 384 } | |
| 385 else { | |
| 386 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 387 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
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388 MutexLockerEx mu(UnsafeJlong_lock, Mutex::_no_safepoint_check_flag); |
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389 Atomic::store(x, addr); |
| 0 | 390 } |
| 391 } | |
| 392 UNSAFE_END | |
| 393 | |
| 10235 | 394 #endif // not SUPPORTS_NATIVE_CX8 |
| 0 | 395 |
| 396 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
| 397 \ | |
| 398 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
| 399 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 400 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
| 401 GET_FIELD(obj, offset, jboolean, v); \ | |
| 402 return v; \ | |
| 403 UNSAFE_END \ | |
| 404 \ | |
| 405 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
| 406 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 407 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
| 408 SET_FIELD(obj, offset, jboolean, x); \ | |
| 409 UNSAFE_END \ | |
| 410 \ | |
| 411 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
| 412 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 413 GET_FIELD(obj, offset, jboolean, v); \ | |
| 414 return v; \ | |
| 415 UNSAFE_END \ | |
| 416 \ | |
| 417 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
| 418 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 419 SET_FIELD(obj, offset, jboolean, x); \ | |
| 420 UNSAFE_END \ | |
| 421 \ | |
| 422 // END DEFINE_GETSETOOP. | |
| 423 | |
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424 DEFINE_GETSETOOP(jboolean, Boolean) |
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425 DEFINE_GETSETOOP(jbyte, Byte) |
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426 DEFINE_GETSETOOP(jshort, Short); |
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427 DEFINE_GETSETOOP(jchar, Char); |
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428 DEFINE_GETSETOOP(jint, Int); |
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429 DEFINE_GETSETOOP(jlong, Long); |
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430 DEFINE_GETSETOOP(jfloat, Float); |
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431 DEFINE_GETSETOOP(jdouble, Double); |
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432 |
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433 #undef DEFINE_GETSETOOP |
| 0 | 434 |
| 435 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
| 436 \ | |
| 437 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
| 438 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 439 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
| 440 return v; \ | |
| 441 UNSAFE_END \ | |
| 442 \ | |
| 443 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
| 444 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 445 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
| 446 UNSAFE_END \ | |
| 447 \ | |
| 448 // END DEFINE_GETSETOOP_VOLATILE. | |
| 449 | |
| 450 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
| 451 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
| 452 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
| 453 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
| 454 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
| 455 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
| 456 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
| 457 | |
| 10235 | 458 #ifdef SUPPORTS_NATIVE_CX8 |
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459 DEFINE_GETSETOOP_VOLATILE(jlong, Long); |
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460 #endif |
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461 |
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462 #undef DEFINE_GETSETOOP_VOLATILE |
| 0 | 463 |
| 464 // The non-intrinsified versions of setOrdered just use setVolatile | |
| 465 | |
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466 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) |
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467 UnsafeWrapper("Unsafe_SetOrderedInt"); |
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468 SET_FIELD_VOLATILE(obj, offset, jint, x); |
| 0 | 469 UNSAFE_END |
| 470 | |
| 471 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 472 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
| 473 oop x = JNIHandles::resolve(x_h); | |
| 474 oop p = JNIHandles::resolve(obj); | |
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475 void* addr = index_oop_from_field_offset_long(p, offset); |
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476 OrderAccess::release(); |
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477 if (UseCompressedOops) { |
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478 oop_store((narrowOop*)addr, x); |
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479 } else { |
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480 oop_store((oop*)addr, x); |
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481 } |
| 0 | 482 OrderAccess::fence(); |
| 483 UNSAFE_END | |
| 484 | |
| 485 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
| 486 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
| 10235 | 487 #ifdef SUPPORTS_NATIVE_CX8 |
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488 SET_FIELD_VOLATILE(obj, offset, jlong, x); |
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489 #else |
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490 // Keep old code for platforms which may not have atomic long (8 bytes) instructions |
| 0 | 491 { |
| 492 if (VM_Version::supports_cx8()) { | |
| 493 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
| 494 } | |
| 495 else { | |
| 496 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 497 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
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498 MutexLockerEx mu(UnsafeJlong_lock, Mutex::_no_safepoint_check_flag); |
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499 Atomic::store(x, addr); |
| 0 | 500 } |
| 501 } | |
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502 #endif |
| 0 | 503 UNSAFE_END |
| 504 | |
| 7425 | 505 UNSAFE_ENTRY(void, Unsafe_LoadFence(JNIEnv *env, jobject unsafe)) |
| 506 UnsafeWrapper("Unsafe_LoadFence"); | |
| 507 OrderAccess::acquire(); | |
| 508 UNSAFE_END | |
| 509 | |
| 510 UNSAFE_ENTRY(void, Unsafe_StoreFence(JNIEnv *env, jobject unsafe)) | |
| 511 UnsafeWrapper("Unsafe_StoreFence"); | |
| 512 OrderAccess::release(); | |
| 513 UNSAFE_END | |
| 514 | |
| 515 UNSAFE_ENTRY(void, Unsafe_FullFence(JNIEnv *env, jobject unsafe)) | |
| 516 UnsafeWrapper("Unsafe_FullFence"); | |
| 517 OrderAccess::fence(); | |
| 518 UNSAFE_END | |
| 519 | |
| 0 | 520 ////// Data in the C heap. |
| 521 | |
| 522 // Note: These do not throw NullPointerException for bad pointers. | |
| 523 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
| 524 // | |
| 525 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
| 526 \ | |
| 527 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
| 528 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
| 529 void* p = addr_from_java(addr); \ | |
| 530 JavaThread* t = JavaThread::current(); \ | |
| 531 t->set_doing_unsafe_access(true); \ | |
| 532 java_type x = *(volatile native_type*)p; \ | |
| 533 t->set_doing_unsafe_access(false); \ | |
| 534 return x; \ | |
| 535 UNSAFE_END \ | |
| 536 \ | |
| 537 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
| 538 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
| 539 JavaThread* t = JavaThread::current(); \ | |
| 540 t->set_doing_unsafe_access(true); \ | |
| 541 void* p = addr_from_java(addr); \ | |
| 542 *(volatile native_type*)p = x; \ | |
| 543 t->set_doing_unsafe_access(false); \ | |
| 544 UNSAFE_END \ | |
| 545 \ | |
| 546 // END DEFINE_GETSETNATIVE. | |
| 547 | |
| 548 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
| 549 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
| 550 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
| 551 DEFINE_GETSETNATIVE(jint, Int, jint); | |
| 552 // no long -- handled specially | |
| 553 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
| 554 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
| 555 | |
| 556 #undef DEFINE_GETSETNATIVE | |
| 557 | |
| 558 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 559 UnsafeWrapper("Unsafe_GetNativeLong"); | |
| 560 JavaThread* t = JavaThread::current(); | |
| 561 // We do it this way to avoid problems with access to heap using 64 | |
| 562 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
| 563 // some CPUs (SPARC) it leads to SIGBUS. | |
| 564 t->set_doing_unsafe_access(true); | |
| 565 void* p = addr_from_java(addr); | |
| 566 jlong x; | |
| 567 if (((intptr_t)p & 7) == 0) { | |
| 568 // jlong is aligned, do a volatile access | |
| 569 x = *(volatile jlong*)p; | |
| 570 } else { | |
| 571 jlong_accessor acc; | |
| 572 acc.words[0] = ((volatile jint*)p)[0]; | |
| 573 acc.words[1] = ((volatile jint*)p)[1]; | |
| 574 x = acc.long_value; | |
| 575 } | |
| 576 t->set_doing_unsafe_access(false); | |
| 577 return x; | |
| 578 UNSAFE_END | |
| 579 | |
| 580 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
| 581 UnsafeWrapper("Unsafe_SetNativeLong"); | |
| 582 JavaThread* t = JavaThread::current(); | |
| 583 // see comment for Unsafe_GetNativeLong | |
| 584 t->set_doing_unsafe_access(true); | |
| 585 void* p = addr_from_java(addr); | |
| 586 if (((intptr_t)p & 7) == 0) { | |
| 587 // jlong is aligned, do a volatile access | |
| 588 *(volatile jlong*)p = x; | |
| 589 } else { | |
| 590 jlong_accessor acc; | |
| 591 acc.long_value = x; | |
| 592 ((volatile jint*)p)[0] = acc.words[0]; | |
| 593 ((volatile jint*)p)[1] = acc.words[1]; | |
| 594 } | |
| 595 t->set_doing_unsafe_access(false); | |
| 596 UNSAFE_END | |
| 597 | |
| 598 | |
| 599 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 600 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
| 601 void* p = addr_from_java(addr); | |
| 602 return addr_to_java(*(void**)p); | |
| 603 UNSAFE_END | |
| 604 | |
| 605 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
| 606 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
| 607 void* p = addr_from_java(addr); | |
| 608 *(void**)p = addr_from_java(x); | |
| 609 UNSAFE_END | |
| 610 | |
| 611 | |
| 612 ////// Allocation requests | |
| 613 | |
| 614 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
| 615 UnsafeWrapper("Unsafe_AllocateInstance"); | |
| 616 { | |
| 617 ThreadToNativeFromVM ttnfv(thread); | |
| 618 return env->AllocObject(cls); | |
| 619 } | |
| 620 UNSAFE_END | |
| 621 | |
| 622 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
| 623 UnsafeWrapper("Unsafe_AllocateMemory"); | |
| 624 size_t sz = (size_t)size; | |
| 625 if (sz != (julong)size || size < 0) { | |
| 626 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 627 } | |
| 628 if (sz == 0) { | |
| 629 return 0; | |
| 630 } | |
| 631 sz = round_to(sz, HeapWordSize); | |
| 6197 | 632 void* x = os::malloc(sz, mtInternal); |
| 0 | 633 if (x == NULL) { |
| 634 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
| 635 } | |
| 636 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
| 637 return addr_to_java(x); | |
| 638 UNSAFE_END | |
| 639 | |
| 640 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
| 641 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
| 642 void* p = addr_from_java(addr); | |
| 643 size_t sz = (size_t)size; | |
| 644 if (sz != (julong)size || size < 0) { | |
| 645 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 646 } | |
| 647 if (sz == 0) { | |
| 648 os::free(p); | |
| 649 return 0; | |
| 650 } | |
| 651 sz = round_to(sz, HeapWordSize); | |
| 6197 | 652 void* x = (p == NULL) ? os::malloc(sz, mtInternal) : os::realloc(p, sz, mtInternal); |
| 0 | 653 if (x == NULL) { |
| 654 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
| 655 } | |
| 656 return addr_to_java(x); | |
| 657 UNSAFE_END | |
| 658 | |
| 659 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 660 UnsafeWrapper("Unsafe_FreeMemory"); | |
| 661 void* p = addr_from_java(addr); | |
| 662 if (p == NULL) { | |
| 663 return; | |
| 664 } | |
| 665 os::free(p); | |
| 666 UNSAFE_END | |
| 667 | |
| 668 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
| 669 UnsafeWrapper("Unsafe_SetMemory"); | |
| 670 size_t sz = (size_t)size; | |
| 671 if (sz != (julong)size || size < 0) { | |
| 672 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 673 } | |
| 674 char* p = (char*) addr_from_java(addr); | |
| 675 Copy::fill_to_memory_atomic(p, sz, value); | |
| 676 UNSAFE_END | |
| 677 | |
| 678 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
| 679 UnsafeWrapper("Unsafe_SetMemory"); | |
| 680 size_t sz = (size_t)size; | |
| 681 if (sz != (julong)size || size < 0) { | |
| 682 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 683 } | |
| 684 oop base = JNIHandles::resolve(obj); | |
| 685 void* p = index_oop_from_field_offset_long(base, offset); | |
| 686 Copy::fill_to_memory_atomic(p, sz, value); | |
| 687 UNSAFE_END | |
| 688 | |
| 689 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
| 690 UnsafeWrapper("Unsafe_CopyMemory"); | |
| 691 if (size == 0) { | |
| 692 return; | |
| 693 } | |
| 694 size_t sz = (size_t)size; | |
| 695 if (sz != (julong)size || size < 0) { | |
| 696 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 697 } | |
| 698 void* src = addr_from_java(srcAddr); | |
| 699 void* dst = addr_from_java(dstAddr); | |
| 700 Copy::conjoint_memory_atomic(src, dst, sz); | |
| 701 UNSAFE_END | |
| 702 | |
| 703 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
| 704 UnsafeWrapper("Unsafe_CopyMemory"); | |
| 705 if (size == 0) { | |
| 706 return; | |
| 707 } | |
| 708 size_t sz = (size_t)size; | |
| 709 if (sz != (julong)size || size < 0) { | |
| 710 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 711 } | |
| 712 oop srcp = JNIHandles::resolve(srcObj); | |
| 713 oop dstp = JNIHandles::resolve(dstObj); | |
| 714 if (dstp != NULL && !dstp->is_typeArray()) { | |
| 715 // NYI: This works only for non-oop arrays at present. | |
| 716 // Generalizing it would be reasonable, but requires card marking. | |
| 717 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
| 718 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 719 } | |
| 720 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
| 721 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
| 722 Copy::conjoint_memory_atomic(src, dst, sz); | |
| 723 UNSAFE_END | |
| 724 | |
| 725 | |
| 726 ////// Random queries | |
| 727 | |
| 728 // See comment at file start about UNSAFE_LEAF | |
| 729 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
| 730 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
| 731 UnsafeWrapper("Unsafe_AddressSize"); | |
| 732 return sizeof(void*); | |
| 733 UNSAFE_END | |
| 734 | |
| 735 // See comment at file start about UNSAFE_LEAF | |
| 736 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
| 737 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
| 738 UnsafeWrapper("Unsafe_PageSize"); | |
| 739 return os::vm_page_size(); | |
| 740 UNSAFE_END | |
| 741 | |
| 742 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
| 743 if (field == NULL) { | |
| 744 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 745 } | |
| 746 | |
| 747 oop reflected = JNIHandles::resolve_non_null(field); | |
| 748 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
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749 Klass* k = java_lang_Class::as_Klass(mirror); |
| 0 | 750 int slot = java_lang_reflect_Field::slot(reflected); |
| 751 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
| 752 | |
| 753 if (must_be_static >= 0) { | |
| 754 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
| 755 if (must_be_static != really_is_static) { | |
| 756 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 757 } | |
| 758 } | |
| 759 | |
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760 int offset = InstanceKlass::cast(k)->field_offset(slot); |
| 0 | 761 return field_offset_from_byte_offset(offset); |
| 762 } | |
| 763 | |
| 764 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 765 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
| 766 return find_field_offset(field, 0, THREAD); | |
| 767 UNSAFE_END | |
| 768 | |
| 769 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 770 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
| 771 return find_field_offset(field, 1, THREAD); | |
| 772 UNSAFE_END | |
| 773 | |
| 774 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
| 775 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
| 776 // Note: In this VM implementation, a field address is always a short | |
| 777 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
| 778 // range of the return type is never used. However, some implementations | |
| 779 // might put the static field inside an array shared by many classes, | |
| 780 // or even at a fixed address, in which case the address could be quite | |
| 781 // large. In that last case, this function would return NULL, since | |
| 782 // the address would operate alone, without any base pointer. | |
| 783 | |
| 784 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 785 | |
| 786 oop reflected = JNIHandles::resolve_non_null(field); | |
| 787 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
| 788 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
| 789 | |
| 790 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
| 791 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 792 } | |
| 793 | |
|
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794 return JNIHandles::make_local(env, mirror); |
| 0 | 795 UNSAFE_END |
| 796 | |
| 797 //@deprecated | |
| 798 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 799 UnsafeWrapper("Unsafe_FieldOffset"); | |
| 800 // tries (but fails) to be polymorphic between static and non-static: | |
| 801 jlong offset = find_field_offset(field, -1, THREAD); | |
| 802 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
| 803 return (jint)offset; | |
| 804 UNSAFE_END | |
| 805 | |
| 806 //@deprecated | |
| 807 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
| 808 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
| 809 if (clazz == NULL) { | |
| 810 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 811 } | |
|
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812 return JNIHandles::make_local(env, JNIHandles::resolve_non_null(clazz)); |
| 0 | 813 UNSAFE_END |
| 814 | |
|
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815 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
| 0 | 816 UnsafeWrapper("Unsafe_EnsureClassInitialized"); |
| 817 if (clazz == NULL) { | |
| 818 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 819 } | |
| 820 oop mirror = JNIHandles::resolve_non_null(clazz); | |
|
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821 |
|
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822 Klass* klass = java_lang_Class::as_Klass(mirror); |
| 6983 | 823 if (klass != NULL && klass->should_be_initialized()) { |
|
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824 InstanceKlass* k = InstanceKlass::cast(klass); |
| 0 | 825 k->initialize(CHECK); |
| 826 } | |
|
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827 } |
|
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828 UNSAFE_END |
|
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829 |
|
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830 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
|
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831 UnsafeWrapper("Unsafe_ShouldBeInitialized"); |
|
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832 if (clazz == NULL) { |
|
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833 THROW_(vmSymbols::java_lang_NullPointerException(), false); |
|
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834 } |
|
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835 oop mirror = JNIHandles::resolve_non_null(clazz); |
|
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836 Klass* klass = java_lang_Class::as_Klass(mirror); |
| 6983 | 837 if (klass != NULL && klass->should_be_initialized()) { |
|
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838 return true; |
|
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|
839 } |
|
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840 return false; |
|
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841 } |
| 0 | 842 UNSAFE_END |
| 843 | |
| 844 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
| 845 if (acls == NULL) { | |
| 846 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 847 } | |
| 848 oop mirror = JNIHandles::resolve_non_null(acls); | |
|
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849 Klass* k = java_lang_Class::as_Klass(mirror); |
|
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850 if (k == NULL || !k->oop_is_array()) { |
| 0 | 851 THROW(vmSymbols::java_lang_InvalidClassException()); |
|
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852 } else if (k->oop_is_objArray()) { |
| 0 | 853 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); |
|
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854 scale = heapOopSize; |
|
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855 } else if (k->oop_is_typeArray()) { |
|
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856 TypeArrayKlass* tak = TypeArrayKlass::cast(k); |
| 0 | 857 base = tak->array_header_in_bytes(); |
| 858 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
| 859 scale = (1 << tak->log2_element_size()); | |
| 860 } else { | |
| 861 ShouldNotReachHere(); | |
| 862 } | |
| 863 } | |
| 864 | |
| 865 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
| 866 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
|
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|
867 int base = 0, scale = 0; |
| 0 | 868 getBaseAndScale(base, scale, acls, CHECK_0); |
| 869 return field_offset_from_byte_offset(base); | |
| 870 UNSAFE_END | |
| 871 | |
| 872 | |
| 873 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
| 874 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
|
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|
875 int base = 0, scale = 0; |
| 0 | 876 getBaseAndScale(base, scale, acls, CHECK_0); |
| 877 // This VM packs both fields and array elements down to the byte. | |
| 878 // But watch out: If this changes, so that array references for | |
| 879 // a given primitive type (say, T_BOOLEAN) use different memory units | |
| 880 // than fields, this method MUST return zero for such arrays. | |
| 881 // For example, the VM used to store sub-word sized fields in full | |
| 882 // words in the object layout, so that accessors like getByte(Object,int) | |
| 883 // did not really do what one might expect for arrays. Therefore, | |
| 884 // this function used to report a zero scale factor, so that the user | |
| 885 // would know not to attempt to access sub-word array elements. | |
| 886 // // Code for unpacked fields: | |
| 887 // if (scale < wordSize) return 0; | |
| 888 | |
| 889 // The following allows for a pretty general fieldOffset cookie scheme, | |
| 890 // but requires it to be linear in byte offset. | |
| 891 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
| 892 UNSAFE_END | |
| 893 | |
| 894 | |
| 895 static inline void throw_new(JNIEnv *env, const char *ename) { | |
| 896 char buf[100]; | |
| 897 strcpy(buf, "java/lang/"); | |
| 898 strcat(buf, ename); | |
| 899 jclass cls = env->FindClass(buf); | |
|
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900 if (env->ExceptionCheck()) { |
|
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|
901 env->ExceptionClear(); |
|
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902 tty->print_cr("Unsafe: cannot throw %s because FindClass has failed", buf); |
|
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903 return; |
|
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|
904 } |
| 0 | 905 char* msg = NULL; |
| 906 env->ThrowNew(cls, msg); | |
| 907 } | |
| 908 | |
|
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909 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { |
| 0 | 910 { |
| 911 // Code lifted from JDK 1.3 ClassLoader.c | |
| 912 | |
| 913 jbyte *body; | |
| 914 char *utfName; | |
| 915 jclass result = 0; | |
| 916 char buf[128]; | |
| 917 | |
| 918 if (UsePerfData) { | |
| 919 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
| 920 } | |
| 921 | |
| 922 if (data == NULL) { | |
| 923 throw_new(env, "NullPointerException"); | |
| 924 return 0; | |
| 925 } | |
| 926 | |
| 927 /* Work around 4153825. malloc crashes on Solaris when passed a | |
| 928 * negative size. | |
| 929 */ | |
| 930 if (length < 0) { | |
| 931 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
| 932 return 0; | |
| 933 } | |
| 934 | |
| 6197 | 935 body = NEW_C_HEAP_ARRAY(jbyte, length, mtInternal); |
| 0 | 936 |
| 937 if (body == 0) { | |
| 938 throw_new(env, "OutOfMemoryError"); | |
| 939 return 0; | |
| 940 } | |
| 941 | |
| 942 env->GetByteArrayRegion(data, offset, length, body); | |
| 943 | |
| 944 if (env->ExceptionOccurred()) | |
| 945 goto free_body; | |
| 946 | |
| 947 if (name != NULL) { | |
| 948 uint len = env->GetStringUTFLength(name); | |
| 949 int unicode_len = env->GetStringLength(name); | |
| 950 if (len >= sizeof(buf)) { | |
| 6197 | 951 utfName = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); |
| 0 | 952 if (utfName == NULL) { |
| 953 throw_new(env, "OutOfMemoryError"); | |
| 954 goto free_body; | |
| 955 } | |
| 956 } else { | |
| 957 utfName = buf; | |
| 958 } | |
| 959 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
| 960 //VerifyFixClassname(utfName); | |
| 961 for (uint i = 0; i < len; i++) { | |
| 962 if (utfName[i] == '.') utfName[i] = '/'; | |
| 963 } | |
| 964 } else { | |
| 965 utfName = NULL; | |
| 966 } | |
| 967 | |
| 968 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
| 969 | |
| 970 if (utfName && utfName != buf) | |
| 6197 | 971 FREE_C_HEAP_ARRAY(char, utfName, mtInternal); |
| 0 | 972 |
| 973 free_body: | |
| 6197 | 974 FREE_C_HEAP_ARRAY(jbyte, body, mtInternal); |
| 0 | 975 return result; |
| 976 } | |
| 977 } | |
| 978 | |
| 979 | |
|
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980 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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981 UnsafeWrapper("Unsafe_DefineClass"); |
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982 { |
|
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983 ThreadToNativeFromVM ttnfv(thread); |
|
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984 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
|
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985 } |
|
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|
986 UNSAFE_END |
|
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|
987 |
|
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988 static jobject get_class_loader(JNIEnv* env, jclass cls) { |
|
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989 if (java_lang_Class::is_primitive(JNIHandles::resolve_non_null(cls))) { |
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990 return NULL; |
|
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|
991 } |
|
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992 Klass* k = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(cls)); |
|
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993 oop loader = k->class_loader(); |
|
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994 return JNIHandles::make_local(env, loader); |
|
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995 } |
|
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996 |
| 0 | 997 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) |
| 998 UnsafeWrapper("Unsafe_DefineClass"); | |
| 999 { | |
| 1000 ThreadToNativeFromVM ttnfv(thread); | |
| 1001 | |
| 1002 int depthFromDefineClass0 = 1; | |
| 1003 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
|
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1004 jobject loader = (caller == NULL) ? NULL : get_class_loader(env, caller); |
| 0 | 1005 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); |
| 1006 | |
|
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1007 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
| 0 | 1008 } |
| 1009 UNSAFE_END | |
| 1010 | |
| 1011 | |
|
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|
1012 #define DAC_Args CLS"[B["OBJ |
|
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1013 // define a class but do not make it known to the class loader or system dictionary |
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1014 // - host_class: supplies context for linkage, access control, protection domain, and class loader |
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1015 // - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
|
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1016 // - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
|
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1017 |
|
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1018 // When you load an anonymous class U, it works as if you changed its name just before loading, |
|
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1019 // to a name that you will never use again. Since the name is lost, no other class can directly |
|
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1020 // link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
|
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1021 // through java.lang.Class methods like Class.newInstance. |
|
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1022 |
|
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1023 // Access checks for linkage sites within U continue to follow the same rules as for named classes. |
|
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1024 // The package of an anonymous class is given by the package qualifier on the name under which it was loaded. |
|
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1025 // An anonymous class also has special privileges to access any member of its host class. |
|
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1026 // This is the main reason why this loading operation is unsafe. The purpose of this is to |
|
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1027 // allow language implementations to simulate "open classes"; a host class in effect gets |
|
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1028 // new code when an anonymous class is loaded alongside it. A less convenient but more |
|
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1029 // standard way to do this is with reflection, which can also be set to ignore access |
|
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|
1030 // restrictions. |
|
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|
1031 |
|
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|
1032 // Access into an anonymous class is possible only through reflection. Therefore, there |
|
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|
1033 // are no special access rules for calling into an anonymous class. The relaxed access |
|
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1034 // rule for the host class is applied in the opposite direction: A host class reflectively |
|
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1035 // access one of its anonymous classes. |
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1036 |
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1037 // If you load the same bytecodes twice, you get two different classes. You can reload |
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1038 // the same bytecodes with or without varying CP patches. |
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1039 |
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1040 // By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
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1041 // The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
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1042 // The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
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1043 |
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1044 // This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
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1045 // an outer class (so that U2 is an anonymous inner class of anonymous U1). |
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1046 // It is not possible for a named class, or an older anonymous class, to refer by |
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1047 // name (via its CP) to a newer anonymous class. |
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1048 |
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1049 // CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
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1050 // or type descriptors used in the loaded anonymous class. |
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1051 |
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1052 // Finally, CP patching may be used to introduce "live" objects into the constant pool, |
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1053 // instead of "dead" strings. A compiled statement like println((Object)"hello") can |
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1054 // be changed to println(greeting), where greeting is an arbitrary object created before |
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1055 // the anonymous class is loaded. This is useful in dynamic languages, in which |
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1056 // various kinds of metaobjects must be introduced as constants into bytecode. |
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1057 // Note the cast (Object), which tells the verifier to expect an arbitrary object, |
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1058 // not just a literal string. For such ldc instructions, the verifier uses the |
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1059 // type Object instead of String, if the loaded constant is not in fact a String. |
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1060 |
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1061 static instanceKlassHandle |
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1062 Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
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1063 jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
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1064 HeapWord* *temp_alloc, |
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1065 TRAPS) { |
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1066 |
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1067 if (UsePerfData) { |
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1068 ClassLoader::unsafe_defineClassCallCounter()->inc(); |
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1069 } |
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1070 |
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1071 if (data == NULL) { |
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1072 THROW_0(vmSymbols::java_lang_NullPointerException()); |
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1073 } |
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1074 |
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1075 jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
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1076 jint word_length = (length + sizeof(HeapWord)-1) / sizeof(HeapWord); |
| 6197 | 1077 HeapWord* body = NEW_C_HEAP_ARRAY(HeapWord, word_length, mtInternal); |
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1078 if (body == NULL) { |
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1079 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
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1080 } |
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1081 |
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1082 // caller responsible to free it: |
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1083 (*temp_alloc) = body; |
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1084 |
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1085 { |
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1086 jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
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1087 Copy::conjoint_words((HeapWord*) array_base, body, word_length); |
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1088 } |
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1089 |
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1090 u1* class_bytes = (u1*) body; |
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1091 int class_bytes_length = (int) length; |
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1092 if (class_bytes_length < 0) class_bytes_length = 0; |
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1093 if (class_bytes == NULL |
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1094 || host_class == NULL |
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1095 || length != class_bytes_length) |
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1096 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1097 |
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1098 objArrayHandle cp_patches_h; |
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1099 if (cp_patches_jh != NULL) { |
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1100 oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
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1101 if (!p->is_objArray()) |
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1102 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1103 cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
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1104 } |
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1105 |
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1106 KlassHandle host_klass(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(host_class))); |
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1107 const char* host_source = host_klass->external_name(); |
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1108 Handle host_loader(THREAD, host_klass->class_loader()); |
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1109 Handle host_domain(THREAD, host_klass->protection_domain()); |
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1110 |
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1111 GrowableArray<Handle>* cp_patches = NULL; |
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1112 if (cp_patches_h.not_null()) { |
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1113 int alen = cp_patches_h->length(); |
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1114 for (int i = alen-1; i >= 0; i--) { |
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1115 oop p = cp_patches_h->obj_at(i); |
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1116 if (p != NULL) { |
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1117 Handle patch(THREAD, p); |
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1118 if (cp_patches == NULL) |
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1119 cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
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1120 cp_patches->at_put(i, patch); |
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1121 } |
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1122 } |
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1123 } |
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1124 |
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1125 ClassFileStream st(class_bytes, class_bytes_length, (char*) host_source); |
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1126 |
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1127 instanceKlassHandle anon_klass; |
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1128 { |
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1129 Symbol* no_class_name = NULL; |
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1130 Klass* anonk = SystemDictionary::parse_stream(no_class_name, |
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1131 host_loader, host_domain, |
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1132 &st, host_klass, cp_patches, |
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1133 CHECK_NULL); |
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1134 if (anonk == NULL) return NULL; |
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1135 anon_klass = instanceKlassHandle(THREAD, anonk); |
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1136 } |
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1137 |
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1138 return anon_klass; |
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1139 } |
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1140 |
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1141 UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) |
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1142 { |
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1143 instanceKlassHandle anon_klass; |
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1144 jobject res_jh = NULL; |
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1145 |
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1146 UnsafeWrapper("Unsafe_DefineAnonymousClass"); |
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1147 ResourceMark rm(THREAD); |
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1148 |
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1149 HeapWord* temp_alloc = NULL; |
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1150 |
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1151 anon_klass = Unsafe_DefineAnonymousClass_impl(env, host_class, data, |
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1152 cp_patches_jh, |
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1153 &temp_alloc, THREAD); |
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1154 if (anon_klass() != NULL) |
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1155 res_jh = JNIHandles::make_local(env, anon_klass->java_mirror()); |
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1156 |
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1157 // try/finally clause: |
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1158 if (temp_alloc != NULL) { |
| 6197 | 1159 FREE_C_HEAP_ARRAY(HeapWord, temp_alloc, mtInternal); |
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1160 } |
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1161 |
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1162 // The anonymous class loader data has been artificially been kept alive to |
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1163 // this point. The mirror and any instances of this class have to keep |
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1164 // it alive afterwards. |
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1165 if (anon_klass() != NULL) { |
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1166 anon_klass->class_loader_data()->set_keep_alive(false); |
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1167 } |
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1168 |
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1169 // let caller initialize it as needed... |
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1170 |
|
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1171 return (jclass) res_jh; |
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1172 } |
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1173 UNSAFE_END |
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1174 |
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1175 |
| 0 | 1176 |
| 1177 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1178 UnsafeWrapper("Unsafe_MonitorEnter"); | |
| 1179 { | |
| 1180 if (jobj == NULL) { | |
| 1181 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1182 } | |
| 1183 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
| 1184 ObjectSynchronizer::jni_enter(obj, CHECK); | |
| 1185 } | |
| 1186 UNSAFE_END | |
| 1187 | |
| 1188 | |
| 1189 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1190 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
| 1191 { | |
| 1192 if (jobj == NULL) { | |
| 1193 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
| 1194 } | |
| 1195 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
| 1196 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
| 1197 return (res ? JNI_TRUE : JNI_FALSE); | |
| 1198 } | |
| 1199 UNSAFE_END | |
| 1200 | |
| 1201 | |
| 1202 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1203 UnsafeWrapper("Unsafe_MonitorExit"); | |
| 1204 { | |
| 1205 if (jobj == NULL) { | |
| 1206 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1207 } | |
| 1208 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
| 1209 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
| 1210 } | |
| 1211 UNSAFE_END | |
| 1212 | |
| 1213 | |
| 1214 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
| 1215 UnsafeWrapper("Unsafe_ThrowException"); | |
| 1216 { | |
| 1217 ThreadToNativeFromVM ttnfv(thread); | |
| 1218 env->Throw(thr); | |
| 1219 } | |
| 1220 UNSAFE_END | |
| 1221 | |
| 1222 // JSR166 ------------------------------------------------------------------ | |
| 1223 | |
| 1224 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
| 1225 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
| 1226 oop x = JNIHandles::resolve(x_h); | |
| 1227 oop e = JNIHandles::resolve(e_h); | |
| 1228 oop p = JNIHandles::resolve(obj); | |
|
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1229 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
|
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1230 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e, true); |
|
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1231 jboolean success = (res == e); |
| 0 | 1232 if (success) |
|
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1233 update_barrier_set((void*)addr, x); |
| 0 | 1234 return success; |
| 1235 UNSAFE_END | |
| 1236 | |
| 1237 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
| 1238 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
| 1239 oop p = JNIHandles::resolve(obj); | |
| 1240 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
| 1241 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
| 1242 UNSAFE_END | |
| 1243 | |
| 1244 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
| 1245 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
| 1246 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 1247 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
|
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1248 #ifdef SUPPORTS_NATIVE_CX8 |
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1249 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; |
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1250 #else |
| 0 | 1251 if (VM_Version::supports_cx8()) |
| 1252 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
| 1253 else { | |
| 1254 jboolean success = false; | |
|
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1255 MutexLockerEx mu(UnsafeJlong_lock, Mutex::_no_safepoint_check_flag); |
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1256 jlong val = Atomic::load(addr); |
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1257 if (val == e) { Atomic::store(x, addr); success = true; } |
| 0 | 1258 return success; |
| 1259 } | |
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1260 #endif |
| 0 | 1261 UNSAFE_END |
| 1262 | |
| 1263 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
| 1264 UnsafeWrapper("Unsafe_Park"); | |
| 10405 | 1265 EventThreadPark event; |
| 4006 | 1266 #ifndef USDT2 |
|
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1267 HS_DTRACE_PROBE3(hotspot, thread__park__begin, thread->parker(), (int) isAbsolute, time); |
| 4006 | 1268 #else /* USDT2 */ |
| 1269 HOTSPOT_THREAD_PARK_BEGIN( | |
| 1270 (uintptr_t) thread->parker(), (int) isAbsolute, time); | |
| 1271 #endif /* USDT2 */ | |
| 0 | 1272 JavaThreadParkedState jtps(thread, time != 0); |
| 1273 thread->parker()->park(isAbsolute != 0, time); | |
| 4006 | 1274 #ifndef USDT2 |
|
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1275 HS_DTRACE_PROBE1(hotspot, thread__park__end, thread->parker()); |
| 4006 | 1276 #else /* USDT2 */ |
| 1277 HOTSPOT_THREAD_PARK_END( | |
| 1278 (uintptr_t) thread->parker()); | |
| 1279 #endif /* USDT2 */ | |
| 10405 | 1280 if (event.should_commit()) { |
| 1281 oop obj = thread->current_park_blocker(); | |
|
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1282 event.set_klass((obj != NULL) ? obj->klass() : NULL); |
| 10405 | 1283 event.set_timeout(time); |
|
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1284 event.set_address((obj != NULL) ? (TYPE_ADDRESS) cast_from_oop<uintptr_t>(obj) : 0); |
| 10405 | 1285 event.commit(); |
| 1286 } | |
| 0 | 1287 UNSAFE_END |
| 1288 | |
| 1289 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
| 1290 UnsafeWrapper("Unsafe_Unpark"); | |
| 1291 Parker* p = NULL; | |
| 1292 if (jthread != NULL) { | |
| 1293 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
| 1294 if (java_thread != NULL) { | |
| 1295 jlong lp = java_lang_Thread::park_event(java_thread); | |
| 1296 if (lp != 0) { | |
| 1297 // This cast is OK even though the jlong might have been read | |
| 1298 // non-atomically on 32bit systems, since there, one word will | |
| 1299 // always be zero anyway and the value set is always the same | |
| 1300 p = (Parker*)addr_from_java(lp); | |
| 1301 } else { | |
| 1302 // Grab lock if apparently null or using older version of library | |
| 1303 MutexLocker mu(Threads_lock); | |
| 1304 java_thread = JNIHandles::resolve_non_null(jthread); | |
| 1305 if (java_thread != NULL) { | |
| 1306 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
| 1307 if (thr != NULL) { | |
| 1308 p = thr->parker(); | |
| 1309 if (p != NULL) { // Bind to Java thread for next time. | |
| 1310 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
| 1311 } | |
| 1312 } | |
| 1313 } | |
| 1314 } | |
| 1315 } | |
| 1316 } | |
| 1317 if (p != NULL) { | |
| 4006 | 1318 #ifndef USDT2 |
|
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1319 HS_DTRACE_PROBE1(hotspot, thread__unpark, p); |
| 4006 | 1320 #else /* USDT2 */ |
| 1321 HOTSPOT_THREAD_UNPARK( | |
| 1322 (uintptr_t) p); | |
| 1323 #endif /* USDT2 */ | |
| 0 | 1324 p->unpark(); |
| 1325 } | |
| 1326 UNSAFE_END | |
| 1327 | |
| 1328 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
| 1329 UnsafeWrapper("Unsafe_Loadavg"); | |
| 1330 const int max_nelem = 3; | |
| 1331 double la[max_nelem]; | |
| 1332 jint ret; | |
| 1333 | |
| 1334 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
| 1335 assert(a->is_typeArray(), "must be type array"); | |
| 1336 | |
| 1337 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
| 1338 ThreadToNativeFromVM ttnfv(thread); | |
| 1339 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
| 1340 return -1; | |
| 1341 } | |
| 1342 | |
| 1343 ret = os::loadavg(la, nelem); | |
| 1344 if (ret == -1) return -1; | |
| 1345 | |
| 1346 // if successful, ret is the number of samples actually retrieved. | |
| 1347 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
| 1348 switch(ret) { | |
| 1349 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
| 1350 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
| 1351 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
| 1352 } | |
| 1353 return ret; | |
| 1354 UNSAFE_END | |
| 1355 | |
| 1356 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
| 1357 UnsafeWrapper("Unsafe_PrefetchRead"); | |
| 1358 oop p = JNIHandles::resolve(obj); | |
| 1359 void* addr = index_oop_from_field_offset_long(p, 0); | |
| 1360 Prefetch::read(addr, (intx)offset); | |
| 1361 UNSAFE_END | |
| 1362 | |
| 1363 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
| 1364 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
| 1365 oop p = JNIHandles::resolve(obj); | |
| 1366 void* addr = index_oop_from_field_offset_long(p, 0); | |
| 1367 Prefetch::write(addr, (intx)offset); | |
| 1368 UNSAFE_END | |
| 1369 | |
| 1370 | |
| 1371 /// JVM_RegisterUnsafeMethods | |
| 1372 | |
| 1373 #define ADR "J" | |
| 1374 | |
| 1375 #define LANG "Ljava/lang/" | |
| 1376 | |
| 1377 #define OBJ LANG"Object;" | |
| 1378 #define CLS LANG"Class;" | |
| 1379 #define CTR LANG"reflect/Constructor;" | |
| 1380 #define FLD LANG"reflect/Field;" | |
| 1381 #define MTH LANG"reflect/Method;" | |
| 1382 #define THR LANG"Throwable;" | |
| 1383 | |
| 1384 #define DC0_Args LANG"String;[BII" | |
|
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1385 #define DC_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" |
| 0 | 1386 |
| 1387 #define CC (char*) /*cast a literal from (const char*)*/ | |
| 1388 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
| 1389 | |
| 1390 // define deprecated accessors for compabitility with 1.4.0 | |
| 1391 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
| 1392 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
| 1393 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
| 1394 | |
| 1395 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
| 1396 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
| 1397 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
| 1398 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
| 1399 | |
| 1400 // Note: In 1.5.0, there are volatile versions too | |
| 1401 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
| 1402 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
| 1403 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
| 1404 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
| 1405 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
| 1406 | |
| 1407 | |
| 1408 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
| 1409 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
| 1410 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
| 1411 | |
| 1412 | |
| 1413 | |
|
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1414 // These are the methods for 1.4.0 |
| 0 | 1415 static JNINativeMethod methods_140[] = { |
| 1416 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
| 1417 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
| 1418 | |
| 1419 DECLARE_GETSETOOP_140(Boolean, Z), | |
| 1420 DECLARE_GETSETOOP_140(Byte, B), | |
| 1421 DECLARE_GETSETOOP_140(Short, S), | |
| 1422 DECLARE_GETSETOOP_140(Char, C), | |
| 1423 DECLARE_GETSETOOP_140(Int, I), | |
| 1424 DECLARE_GETSETOOP_140(Long, J), | |
| 1425 DECLARE_GETSETOOP_140(Float, F), | |
| 1426 DECLARE_GETSETOOP_140(Double, D), | |
| 1427 | |
| 1428 DECLARE_GETSETNATIVE(Byte, B), | |
| 1429 DECLARE_GETSETNATIVE(Short, S), | |
| 1430 DECLARE_GETSETNATIVE(Char, C), | |
| 1431 DECLARE_GETSETNATIVE(Int, I), | |
| 1432 DECLARE_GETSETNATIVE(Long, J), | |
| 1433 DECLARE_GETSETNATIVE(Float, F), | |
| 1434 DECLARE_GETSETNATIVE(Double, D), | |
| 1435 | |
| 1436 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1437 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1438 | |
| 1439 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1440 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1441 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1442 | |
|
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1443 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, |
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1444 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, |
| 0 | 1445 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
| 1446 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1447 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1448 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1449 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1450 | |
| 1451 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
|
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1452 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
| 0 | 1453 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
| 1454 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1455 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1456 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
| 1457 }; | |
| 1458 | |
|
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1459 // These are the methods prior to the JSR 166 changes in 1.5.0 |
| 0 | 1460 static JNINativeMethod methods_141[] = { |
| 1461 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
| 1462 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1463 | |
| 1464 DECLARE_GETSETOOP_141(Boolean, Z), | |
| 1465 DECLARE_GETSETOOP_141(Byte, B), | |
| 1466 DECLARE_GETSETOOP_141(Short, S), | |
| 1467 DECLARE_GETSETOOP_141(Char, C), | |
| 1468 DECLARE_GETSETOOP_141(Int, I), | |
| 1469 DECLARE_GETSETOOP_141(Long, J), | |
| 1470 DECLARE_GETSETOOP_141(Float, F), | |
| 1471 DECLARE_GETSETOOP_141(Double, D), | |
| 1472 | |
| 1473 DECLARE_GETSETNATIVE(Byte, B), | |
| 1474 DECLARE_GETSETNATIVE(Short, S), | |
| 1475 DECLARE_GETSETNATIVE(Char, C), | |
| 1476 DECLARE_GETSETNATIVE(Int, I), | |
| 1477 DECLARE_GETSETNATIVE(Long, J), | |
| 1478 DECLARE_GETSETNATIVE(Float, F), | |
| 1479 DECLARE_GETSETNATIVE(Double, D), | |
| 1480 | |
| 1481 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1482 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1483 | |
| 1484 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1485 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1486 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1487 | |
| 1488 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1489 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1490 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1491 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1492 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1493 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1494 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1495 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1496 | |
| 1497 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
|
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1498 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
| 0 | 1499 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
| 1500 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1501 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1502 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
| 1503 | |
| 1504 }; | |
| 1505 | |
|
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1506 // These are the methods prior to the JSR 166 changes in 1.6.0 |
| 0 | 1507 static JNINativeMethod methods_15[] = { |
| 1508 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
| 1509 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1510 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
| 1511 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
| 1512 | |
| 1513 | |
| 1514 DECLARE_GETSETOOP(Boolean, Z), | |
| 1515 DECLARE_GETSETOOP(Byte, B), | |
| 1516 DECLARE_GETSETOOP(Short, S), | |
| 1517 DECLARE_GETSETOOP(Char, C), | |
| 1518 DECLARE_GETSETOOP(Int, I), | |
| 1519 DECLARE_GETSETOOP(Long, J), | |
| 1520 DECLARE_GETSETOOP(Float, F), | |
| 1521 DECLARE_GETSETOOP(Double, D), | |
| 1522 | |
| 1523 DECLARE_GETSETNATIVE(Byte, B), | |
| 1524 DECLARE_GETSETNATIVE(Short, S), | |
| 1525 DECLARE_GETSETNATIVE(Char, C), | |
| 1526 DECLARE_GETSETNATIVE(Int, I), | |
| 1527 DECLARE_GETSETNATIVE(Long, J), | |
| 1528 DECLARE_GETSETNATIVE(Float, F), | |
| 1529 DECLARE_GETSETNATIVE(Double, D), | |
| 1530 | |
| 1531 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1532 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1533 | |
| 1534 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1535 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1536 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1537 | |
| 1538 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1539 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1540 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1541 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1542 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1543 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1544 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1545 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1546 | |
| 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)}, |
| 0 | 1549 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
| 1550 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1551 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1552 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
| 1553 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
| 1554 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
| 1555 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
| 1556 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
| 1557 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
| 1558 | |
| 1559 }; | |
| 1560 | |
|
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1561 // These are the methods for 1.6.0 and 1.7.0 |
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1562 static JNINativeMethod methods_16[] = { |
| 0 | 1563 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
| 1564 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1565 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
| 1566 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
| 1567 | |
|
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1568 DECLARE_GETSETOOP(Boolean, Z), |
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1569 DECLARE_GETSETOOP(Byte, B), |
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1570 DECLARE_GETSETOOP(Short, S), |
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1571 DECLARE_GETSETOOP(Char, C), |
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1572 DECLARE_GETSETOOP(Int, I), |
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1573 DECLARE_GETSETOOP(Long, J), |
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1574 DECLARE_GETSETOOP(Float, F), |
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1575 DECLARE_GETSETOOP(Double, D), |
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1576 |
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1577 DECLARE_GETSETNATIVE(Byte, B), |
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1578 DECLARE_GETSETNATIVE(Short, S), |
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1579 DECLARE_GETSETNATIVE(Char, C), |
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1580 DECLARE_GETSETNATIVE(Int, I), |
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1581 DECLARE_GETSETNATIVE(Long, J), |
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1582 DECLARE_GETSETNATIVE(Float, F), |
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1583 DECLARE_GETSETNATIVE(Double, D), |
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1584 |
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1585 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, |
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1586 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, |
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1587 |
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1588 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, |
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1589 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, |
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1590 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, |
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1591 |
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1592 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, |
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1593 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, |
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1594 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, |
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1595 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
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1596 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, |
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1597 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, |
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1598 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, |
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1599 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, |
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1600 |
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1601 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, |
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1602 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
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1603 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
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1604 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, |
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1605 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, |
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1606 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, |
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1607 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, |
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1608 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, |
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1609 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, |
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1610 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, |
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1611 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, |
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1612 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, |
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1613 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, |
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1614 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, |
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1615 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} |
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1616 }; |
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1617 |
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1618 // These are the methods for 1.8.0 |
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1619 static JNINativeMethod methods_18[] = { |
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1620 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
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1621 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, |
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1622 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, |
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1623 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, |
| 0 | 1624 |
| 1625 DECLARE_GETSETOOP(Boolean, Z), | |
| 1626 DECLARE_GETSETOOP(Byte, B), | |
| 1627 DECLARE_GETSETOOP(Short, S), | |
| 1628 DECLARE_GETSETOOP(Char, C), | |
| 1629 DECLARE_GETSETOOP(Int, I), | |
| 1630 DECLARE_GETSETOOP(Long, J), | |
| 1631 DECLARE_GETSETOOP(Float, F), | |
| 1632 DECLARE_GETSETOOP(Double, D), | |
| 1633 | |
| 1634 DECLARE_GETSETNATIVE(Byte, B), | |
| 1635 DECLARE_GETSETNATIVE(Short, S), | |
| 1636 DECLARE_GETSETNATIVE(Char, C), | |
| 1637 DECLARE_GETSETNATIVE(Int, I), | |
| 1638 DECLARE_GETSETNATIVE(Long, J), | |
| 1639 DECLARE_GETSETNATIVE(Float, F), | |
| 1640 DECLARE_GETSETNATIVE(Double, D), | |
| 1641 | |
| 1642 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1643 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1644 | |
| 1645 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1646 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1647 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1648 | |
| 1649 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1650 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1651 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1652 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1653 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1654 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1655 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1656 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1657 | |
|
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1658 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
| 0 | 1659 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
| 1660 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1661 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1662 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
| 1663 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
| 1664 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
| 1665 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
| 1666 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
| 1667 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
| 1668 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
| 1669 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
| 1670 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
| 1671 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
| 1672 }; | |
| 1673 | |
| 1674 JNINativeMethod loadavg_method[] = { | |
|
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1675 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} |
| 0 | 1676 }; |
| 1677 | |
| 1678 JNINativeMethod prefetch_methods[] = { | |
| 1679 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
| 1680 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
| 1681 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
| 1682 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
| 1683 }; | |
| 1684 | |
|
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1685 JNINativeMethod memcopy_methods_17[] = { |
| 0 | 1686 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, |
| 1687 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
| 1688 }; | |
| 1689 | |
| 1690 JNINativeMethod memcopy_methods_15[] = { | |
| 1691 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
| 1692 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
| 1693 }; | |
| 1694 | |
|
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1695 JNINativeMethod anonk_methods[] = { |
|
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1696 {CC"defineAnonymousClass", CC"("DAC_Args")"CLS, FN_PTR(Unsafe_DefineAnonymousClass)}, |
|
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1697 }; |
| 0 | 1698 |
|
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1699 JNINativeMethod lform_methods[] = { |
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1700 {CC"shouldBeInitialized",CC"("CLS")Z", FN_PTR(Unsafe_ShouldBeInitialized)}, |
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1701 }; |
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1702 |
|
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1703 JNINativeMethod fence_methods[] = { |
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1704 {CC"loadFence", CC"()V", FN_PTR(Unsafe_LoadFence)}, |
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1705 {CC"storeFence", CC"()V", FN_PTR(Unsafe_StoreFence)}, |
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1706 {CC"fullFence", CC"()V", FN_PTR(Unsafe_FullFence)}, |
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1707 }; |
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1708 |
| 0 | 1709 #undef CC |
| 1710 #undef FN_PTR | |
| 1711 | |
| 1712 #undef ADR | |
| 1713 #undef LANG | |
| 1714 #undef OBJ | |
| 1715 #undef CLS | |
| 1716 #undef CTR | |
| 1717 #undef FLD | |
| 1718 #undef MTH | |
| 1719 #undef THR | |
| 1720 #undef DC0_Args | |
|
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1721 #undef DC_Args |
| 0 | 1722 |
| 1723 #undef DECLARE_GETSETOOP | |
| 1724 #undef DECLARE_GETSETNATIVE | |
| 1725 | |
| 1726 | |
|
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1727 /** |
|
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1728 * Helper method to register native methods. |
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1729 */ |
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1730 static bool register_natives(const char* message, JNIEnv* env, jclass clazz, const JNINativeMethod* methods, jint nMethods) { |
|
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1731 int status = env->RegisterNatives(clazz, methods, nMethods); |
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1732 if (status < 0 || env->ExceptionOccurred()) { |
|
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1733 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
|
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1734 tty->print_cr("Unsafe: failed registering %s", message); |
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1735 } |
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1736 env->ExceptionClear(); |
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1737 return false; |
|
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1738 } else { |
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1739 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
|
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1740 tty->print_cr("Unsafe: successfully registered %s", message); |
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1741 } |
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1742 return true; |
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1743 } |
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1744 } |
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1745 |
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1746 |
| 0 | 1747 // This one function is exported, used by NativeLookup. |
| 1748 // The Unsafe_xxx functions above are called only from the interpreter. | |
| 1749 // The optimizer looks at names and signatures to recognize | |
| 1750 // individual functions. | |
| 1751 | |
| 1752 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
| 1753 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
| 1754 { | |
| 1755 ThreadToNativeFromVM ttnfv(thread); | |
|
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1756 |
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1757 // Unsafe methods |
| 0 | 1758 { |
|
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1759 bool success = false; |
|
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1760 // 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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1761 if (!success) { |
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1762 success = register_natives("1.6 methods", env, unsafecls, methods_16, sizeof(methods_16)/sizeof(JNINativeMethod)); |
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1763 } |
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1764 if (!success) { |
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1765 success = register_natives("1.8 methods", env, unsafecls, methods_18, sizeof(methods_18)/sizeof(JNINativeMethod)); |
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1766 } |
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1767 if (!success) { |
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1768 success = register_natives("1.5 methods", env, unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); |
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1769 } |
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1770 if (!success) { |
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1771 success = register_natives("1.4.1 methods", env, unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); |
| 0 | 1772 } |
|
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1773 if (!success) { |
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1774 success = register_natives("1.4.0 methods", env, unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); |
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1775 } |
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1776 guarantee(success, "register unsafe natives"); |
| 0 | 1777 } |
|
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1778 |
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1779 // Unsafe.getLoadAverage |
|
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1780 register_natives("1.6 loadavg method", env, unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); |
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1781 |
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1782 // Prefetch methods |
|
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1783 register_natives("1.6 prefetch methods", env, unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); |
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1784 |
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1785 // Memory copy methods |
| 0 | 1786 { |
|
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1787 bool success = false; |
|
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1788 if (!success) { |
|
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1789 success = register_natives("1.7 memory copy methods", env, unsafecls, memcopy_methods_17, sizeof(memcopy_methods_17)/sizeof(JNINativeMethod)); |
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1790 } |
|
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1791 if (!success) { |
|
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1792 success = register_natives("1.5 memory copy methods", env, unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); |
| 0 | 1793 } |
| 1794 } | |
|
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1795 |
|
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1796 // Unsafe.defineAnonymousClass |
|
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1797 if (EnableInvokeDynamic) { |
|
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1798 register_natives("1.7 define anonymous class method", env, unsafecls, anonk_methods, sizeof(anonk_methods)/sizeof(JNINativeMethod)); |
|
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1799 } |
|
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1800 |
|
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1801 // Unsafe.shouldBeInitialized |
|
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1802 if (EnableInvokeDynamic) { |
|
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1803 register_natives("1.7 LambdaForm support", env, unsafecls, lform_methods, sizeof(lform_methods)/sizeof(JNINativeMethod)); |
| 0 | 1804 } |
|
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1805 |
|
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1806 // Fence methods |
|
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1807 register_natives("1.8 fence methods", env, unsafecls, fence_methods, sizeof(fence_methods)/sizeof(JNINativeMethod)); |
| 0 | 1808 } |
| 1809 JVM_END |