Mercurial > hg > graal-jvmci-8
annotate src/share/vm/prims/unsafe.cpp @ 17937:78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
8043029: Change 8037816 breaks HS build with older GCC versions which don't support diagnostic pragmas
8043164: Format warning in traceStream.hpp
Summary: Backport of main fix + two corrections, enables clang compilation, turns on format attributes, corrects/mutes warnings
Reviewed-by: kvn, coleenp, iveresov, twisti
| author | drchase |
|---|---|
| date | Thu, 22 May 2014 15:52:41 -0400 |
| parents | 62c54fcc0a35 |
| children | 52b4284cb496 ce8f6bb717c9 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/vmSymbols.hpp" | |
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27 #include "utilities/macros.hpp" |
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28 #if INCLUDE_ALL_GCS |
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29 #include "gc_implementation/g1/g1SATBCardTableModRefBS.hpp" |
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30 #endif // INCLUDE_ALL_GCS |
| 1972 | 31 #include "memory/allocation.inline.hpp" |
| 32 #include "prims/jni.h" | |
| 33 #include "prims/jvm.h" | |
| 34 #include "runtime/globals.hpp" | |
| 35 #include "runtime/interfaceSupport.hpp" | |
| 36 #include "runtime/reflection.hpp" | |
| 37 #include "runtime/synchronizer.hpp" | |
| 38 #include "services/threadService.hpp" | |
| 10405 | 39 #include "trace/tracing.hpp" |
| 1972 | 40 #include "utilities/copy.hpp" |
| 41 #include "utilities/dtrace.hpp" | |
| 42 | |
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43 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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44 |
| 0 | 45 /* |
| 46 * Implementation of class sun.misc.Unsafe | |
| 47 */ | |
| 48 | |
| 4006 | 49 #ifndef USDT2 |
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50 HS_DTRACE_PROBE_DECL3(hotspot, thread__park__begin, uintptr_t, int, long long); |
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51 HS_DTRACE_PROBE_DECL1(hotspot, thread__park__end, uintptr_t); |
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52 HS_DTRACE_PROBE_DECL1(hotspot, thread__unpark, uintptr_t); |
| 4006 | 53 #endif /* !USDT2 */ |
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54 |
| 0 | 55 #define MAX_OBJECT_SIZE \ |
| 56 ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ | |
| 57 + ((julong)max_jint * sizeof(double)) ) | |
| 58 | |
| 59 | |
| 60 #define UNSAFE_ENTRY(result_type, header) \ | |
| 61 JVM_ENTRY(result_type, header) | |
| 62 | |
| 63 // Can't use UNSAFE_LEAF because it has the signature of a straight | |
| 64 // call into the runtime (just like JVM_LEAF, funny that) but it's | |
| 65 // called like a Java Native and thus the wrapper built for it passes | |
| 66 // arguments like a JNI call. It expects those arguments to be popped | |
| 67 // from the stack on Intel like all good JNI args are, and adjusts the | |
| 68 // stack according. Since the JVM_LEAF call expects no extra | |
| 69 // arguments the stack isn't popped in the C code, is pushed by the | |
| 70 // wrapper and we get sick. | |
| 71 //#define UNSAFE_LEAF(result_type, header) \ | |
| 72 // JVM_LEAF(result_type, header) | |
| 73 | |
| 74 #define UNSAFE_END JVM_END | |
| 75 | |
| 76 #define UnsafeWrapper(arg) /*nothing, for the present*/ | |
| 77 | |
| 78 | |
| 79 inline void* addr_from_java(jlong addr) { | |
| 80 // This assert fails in a variety of ways on 32-bit systems. | |
| 81 // It is impossible to predict whether native code that converts | |
| 82 // pointers to longs will sign-extend or zero-extend the addresses. | |
| 83 //assert(addr == (uintptr_t)addr, "must not be odd high bits"); | |
| 84 return (void*)(uintptr_t)addr; | |
| 85 } | |
| 86 | |
| 87 inline jlong addr_to_java(void* p) { | |
| 88 assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); | |
| 89 return (uintptr_t)p; | |
| 90 } | |
| 91 | |
| 92 | |
| 93 // Note: The VM's obj_field and related accessors use byte-scaled | |
| 94 // ("unscaled") offsets, just as the unsafe methods do. | |
| 95 | |
| 96 // However, the method Unsafe.fieldOffset explicitly declines to | |
| 97 // guarantee this. The field offset values manipulated by the Java user | |
| 98 // through the Unsafe API are opaque cookies that just happen to be byte | |
| 99 // offsets. We represent this state of affairs by passing the cookies | |
| 100 // through conversion functions when going between the VM and the Unsafe API. | |
| 101 // The conversion functions just happen to be no-ops at present. | |
| 102 | |
| 103 inline jlong field_offset_to_byte_offset(jlong field_offset) { | |
| 104 return field_offset; | |
| 105 } | |
| 106 | |
| 107 inline jlong field_offset_from_byte_offset(jlong byte_offset) { | |
| 108 return byte_offset; | |
| 109 } | |
| 110 | |
| 111 inline jint invocation_key_from_method_slot(jint slot) { | |
| 112 return slot; | |
| 113 } | |
| 114 | |
| 115 inline jint invocation_key_to_method_slot(jint key) { | |
| 116 return key; | |
| 117 } | |
| 118 | |
| 119 inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { | |
| 120 jlong byte_offset = field_offset_to_byte_offset(field_offset); | |
| 121 #ifdef ASSERT | |
| 122 if (p != NULL) { | |
| 123 assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); | |
| 124 if (byte_offset == (jint)byte_offset) { | |
| 125 void* ptr_plus_disp = (address)p + byte_offset; | |
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126 assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, |
| 0 | 127 "raw [ptr+disp] must be consistent with oop::field_base"); |
| 128 } | |
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129 jlong p_size = HeapWordSize * (jlong)(p->size()); |
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130 assert(byte_offset < p_size, err_msg("Unsafe access: offset " INT64_FORMAT " > object's size " INT64_FORMAT, byte_offset, p_size)); |
| 0 | 131 } |
| 132 #endif | |
| 133 if (sizeof(char*) == sizeof(jint)) // (this constant folds!) | |
| 134 return (address)p + (jint) byte_offset; | |
| 135 else | |
| 136 return (address)p + byte_offset; | |
| 137 } | |
| 138 | |
| 139 // Externally callable versions: | |
| 140 // (Use these in compiler intrinsics which emulate unsafe primitives.) | |
| 141 jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { | |
| 142 return field_offset; | |
| 143 } | |
| 144 jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { | |
| 145 return byte_offset; | |
| 146 } | |
| 147 jint Unsafe_invocation_key_from_method_slot(jint slot) { | |
| 148 return invocation_key_from_method_slot(slot); | |
| 149 } | |
| 150 jint Unsafe_invocation_key_to_method_slot(jint key) { | |
| 151 return invocation_key_to_method_slot(key); | |
| 152 } | |
| 153 | |
| 154 | |
| 155 ///// Data in the Java heap. | |
| 156 | |
| 157 #define GET_FIELD(obj, offset, type_name, v) \ | |
| 158 oop p = JNIHandles::resolve(obj); \ | |
| 159 type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) | |
| 160 | |
| 161 #define SET_FIELD(obj, offset, type_name, x) \ | |
| 162 oop p = JNIHandles::resolve(obj); \ | |
| 163 *(type_name*)index_oop_from_field_offset_long(p, offset) = x | |
| 164 | |
| 165 #define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ | |
| 166 oop p = JNIHandles::resolve(obj); \ | |
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167 if (support_IRIW_for_not_multiple_copy_atomic_cpu) { \ |
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168 OrderAccess::fence(); \ |
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169 } \ |
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170 volatile type_name v = OrderAccess::load_acquire((volatile type_name*)index_oop_from_field_offset_long(p, offset)); |
| 0 | 171 |
| 172 #define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ | |
| 173 oop p = JNIHandles::resolve(obj); \ | |
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174 OrderAccess::release_store_fence((volatile type_name*)index_oop_from_field_offset_long(p, offset), x); |
| 0 | 175 |
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176 // Macros for oops that check UseCompressedOops |
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177 |
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178 #define GET_OOP_FIELD(obj, offset, v) \ |
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179 oop p = JNIHandles::resolve(obj); \ |
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180 oop v; \ |
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181 if (UseCompressedOops) { \ |
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182 narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ |
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183 v = oopDesc::decode_heap_oop(n); \ |
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184 } else { \ |
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185 v = *(oop*)index_oop_from_field_offset_long(p, offset); \ |
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186 } |
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187 |
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188 |
| 0 | 189 // Get/SetObject must be special-cased, since it works with handles. |
| 190 | |
| 191 // The xxx140 variants for backward compatibility do not allow a full-width offset. | |
| 192 UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) | |
| 193 UnsafeWrapper("Unsafe_GetObject"); | |
| 194 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
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195 GET_OOP_FIELD(obj, offset, v) |
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196 jobject ret = JNIHandles::make_local(env, v); |
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197 #if INCLUDE_ALL_GCS |
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198 // We could be accessing the referent field in a reference |
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199 // object. If G1 is enabled then we need to register a non-null |
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200 // referent with the SATB barrier. |
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201 if (UseG1GC) { |
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202 bool needs_barrier = false; |
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203 |
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204 if (ret != NULL) { |
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205 if (offset == java_lang_ref_Reference::referent_offset) { |
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206 oop o = JNIHandles::resolve_non_null(obj); |
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207 Klass* k = o->klass(); |
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208 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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209 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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210 needs_barrier = true; |
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211 } |
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212 } |
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213 } |
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214 |
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215 if (needs_barrier) { |
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216 oop referent = JNIHandles::resolve(ret); |
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217 G1SATBCardTableModRefBS::enqueue(referent); |
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218 } |
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219 } |
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220 #endif // INCLUDE_ALL_GCS |
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221 return ret; |
| 0 | 222 UNSAFE_END |
| 223 | |
| 224 UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) | |
| 225 UnsafeWrapper("Unsafe_SetObject"); | |
| 226 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); | |
| 227 oop x = JNIHandles::resolve(x_h); | |
| 228 //SET_FIELD(obj, offset, oop, x); | |
| 229 oop p = JNIHandles::resolve(obj); | |
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230 if (UseCompressedOops) { |
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231 if (x != NULL) { |
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232 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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233 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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234 } else { |
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235 narrowOop n = oopDesc::encode_heap_oop_not_null(x); |
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236 *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; |
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237 } |
| 0 | 238 } else { |
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239 if (x != NULL) { |
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240 // If there is a heap base pointer, we are obliged to emit a store barrier. |
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241 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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242 } else { |
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243 *(oop*)index_oop_from_field_offset_long(p, offset) = x; |
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244 } |
| 0 | 245 } |
| 246 UNSAFE_END | |
| 247 | |
| 248 // The normal variants allow a null base pointer with an arbitrary address. | |
| 249 // But if the base pointer is non-null, the offset should make some sense. | |
| 250 // That is, it should be in the range [0, MAX_OBJECT_SIZE]. | |
| 251 UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 252 UnsafeWrapper("Unsafe_GetObject"); | |
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253 GET_OOP_FIELD(obj, offset, v) |
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254 jobject ret = JNIHandles::make_local(env, v); |
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255 #if INCLUDE_ALL_GCS |
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256 // We could be accessing the referent field in a reference |
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257 // object. If G1 is enabled then we need to register non-null |
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258 // referent with the SATB barrier. |
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259 if (UseG1GC) { |
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260 bool needs_barrier = false; |
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261 |
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262 if (ret != NULL) { |
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263 if (offset == java_lang_ref_Reference::referent_offset && obj != NULL) { |
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264 oop o = JNIHandles::resolve(obj); |
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265 Klass* k = o->klass(); |
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266 if (InstanceKlass::cast(k)->reference_type() != REF_NONE) { |
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267 assert(InstanceKlass::cast(k)->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); |
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268 needs_barrier = true; |
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269 } |
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270 } |
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271 } |
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272 |
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273 if (needs_barrier) { |
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274 oop referent = JNIHandles::resolve(ret); |
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275 G1SATBCardTableModRefBS::enqueue(referent); |
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276 } |
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277 } |
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278 #endif // INCLUDE_ALL_GCS |
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279 return ret; |
| 0 | 280 UNSAFE_END |
| 281 | |
| 282 UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 283 UnsafeWrapper("Unsafe_SetObject"); | |
| 284 oop x = JNIHandles::resolve(x_h); | |
| 285 oop p = JNIHandles::resolve(obj); | |
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286 if (UseCompressedOops) { |
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287 oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); |
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288 } else { |
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289 oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); |
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290 } |
| 0 | 291 UNSAFE_END |
| 292 | |
| 293 UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 294 UnsafeWrapper("Unsafe_GetObjectVolatile"); | |
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295 oop p = JNIHandles::resolve(obj); |
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296 void* addr = index_oop_from_field_offset_long(p, offset); |
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297 volatile oop v; |
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298 if (UseCompressedOops) { |
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299 volatile narrowOop n = *(volatile narrowOop*) addr; |
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300 (void)const_cast<oop&>(v = oopDesc::decode_heap_oop(n)); |
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301 } else { |
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302 (void)const_cast<oop&>(v = *(volatile oop*) addr); |
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303 } |
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304 OrderAccess::acquire(); |
| 0 | 305 return JNIHandles::make_local(env, v); |
| 306 UNSAFE_END | |
| 307 | |
| 308 UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 309 UnsafeWrapper("Unsafe_SetObjectVolatile"); | |
| 310 oop x = JNIHandles::resolve(x_h); | |
| 311 oop p = JNIHandles::resolve(obj); | |
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312 void* addr = index_oop_from_field_offset_long(p, offset); |
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313 OrderAccess::release(); |
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314 if (UseCompressedOops) { |
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315 oop_store((narrowOop*)addr, x); |
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316 } else { |
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317 oop_store((oop*)addr, x); |
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318 } |
| 0 | 319 OrderAccess::fence(); |
| 320 UNSAFE_END | |
| 321 | |
| 10235 | 322 #ifndef SUPPORTS_NATIVE_CX8 |
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323 // Keep old code for platforms which may not have atomic jlong (8 bytes) instructions |
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324 |
| 0 | 325 // Volatile long versions must use locks if !VM_Version::supports_cx8(). |
| 326 // support_cx8 is a surrogate for 'supports atomic long memory ops'. | |
| 327 | |
| 328 UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) | |
| 329 UnsafeWrapper("Unsafe_GetLongVolatile"); | |
| 330 { | |
| 331 if (VM_Version::supports_cx8()) { | |
| 332 GET_FIELD_VOLATILE(obj, offset, jlong, v); | |
| 333 return v; | |
| 334 } | |
| 335 else { | |
| 336 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 337 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 338 ObjectLocker ol(p, THREAD); | |
| 339 jlong value = *addr; | |
| 340 return value; | |
| 341 } | |
| 342 } | |
| 343 UNSAFE_END | |
| 344 | |
| 345 UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
| 346 UnsafeWrapper("Unsafe_SetLongVolatile"); | |
| 347 { | |
| 348 if (VM_Version::supports_cx8()) { | |
| 349 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
| 350 } | |
| 351 else { | |
| 352 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 353 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 354 ObjectLocker ol(p, THREAD); | |
| 355 *addr = x; | |
| 356 } | |
| 357 } | |
| 358 UNSAFE_END | |
| 359 | |
| 10235 | 360 #endif // not SUPPORTS_NATIVE_CX8 |
| 0 | 361 |
| 362 #define DEFINE_GETSETOOP(jboolean, Boolean) \ | |
| 363 \ | |
| 364 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ | |
| 365 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 366 if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ | |
| 367 GET_FIELD(obj, offset, jboolean, v); \ | |
| 368 return v; \ | |
| 369 UNSAFE_END \ | |
| 370 \ | |
| 371 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ | |
| 372 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 373 if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ | |
| 374 SET_FIELD(obj, offset, jboolean, x); \ | |
| 375 UNSAFE_END \ | |
| 376 \ | |
| 377 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
| 378 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 379 GET_FIELD(obj, offset, jboolean, v); \ | |
| 380 return v; \ | |
| 381 UNSAFE_END \ | |
| 382 \ | |
| 383 UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
| 384 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 385 SET_FIELD(obj, offset, jboolean, x); \ | |
| 386 UNSAFE_END \ | |
| 387 \ | |
| 388 // END DEFINE_GETSETOOP. | |
| 389 | |
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390 DEFINE_GETSETOOP(jboolean, Boolean) |
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391 DEFINE_GETSETOOP(jbyte, Byte) |
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392 DEFINE_GETSETOOP(jshort, Short); |
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393 DEFINE_GETSETOOP(jchar, Char); |
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394 DEFINE_GETSETOOP(jint, Int); |
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395 DEFINE_GETSETOOP(jlong, Long); |
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396 DEFINE_GETSETOOP(jfloat, Float); |
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397 DEFINE_GETSETOOP(jdouble, Double); |
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398 |
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399 #undef DEFINE_GETSETOOP |
| 0 | 400 |
| 401 #define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ | |
| 402 \ | |
| 403 UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ | |
| 404 UnsafeWrapper("Unsafe_Get"#Boolean); \ | |
| 405 GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ | |
| 406 return v; \ | |
| 407 UNSAFE_END \ | |
| 408 \ | |
| 409 UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ | |
| 410 UnsafeWrapper("Unsafe_Set"#Boolean); \ | |
| 411 SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ | |
| 412 UNSAFE_END \ | |
| 413 \ | |
| 414 // END DEFINE_GETSETOOP_VOLATILE. | |
| 415 | |
| 416 DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) | |
| 417 DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) | |
| 418 DEFINE_GETSETOOP_VOLATILE(jshort, Short); | |
| 419 DEFINE_GETSETOOP_VOLATILE(jchar, Char); | |
| 420 DEFINE_GETSETOOP_VOLATILE(jint, Int); | |
| 421 DEFINE_GETSETOOP_VOLATILE(jfloat, Float); | |
| 422 DEFINE_GETSETOOP_VOLATILE(jdouble, Double); | |
| 423 | |
| 10235 | 424 #ifdef SUPPORTS_NATIVE_CX8 |
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425 DEFINE_GETSETOOP_VOLATILE(jlong, Long); |
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426 #endif |
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427 |
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428 #undef DEFINE_GETSETOOP_VOLATILE |
| 0 | 429 |
| 430 // The non-intrinsified versions of setOrdered just use setVolatile | |
| 431 | |
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432 UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) |
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433 UnsafeWrapper("Unsafe_SetOrderedInt"); |
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434 SET_FIELD_VOLATILE(obj, offset, jint, x); |
| 0 | 435 UNSAFE_END |
| 436 | |
| 437 UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) | |
| 438 UnsafeWrapper("Unsafe_SetOrderedObject"); | |
| 439 oop x = JNIHandles::resolve(x_h); | |
| 440 oop p = JNIHandles::resolve(obj); | |
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441 void* addr = index_oop_from_field_offset_long(p, offset); |
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442 OrderAccess::release(); |
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443 if (UseCompressedOops) { |
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444 oop_store((narrowOop*)addr, x); |
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445 } else { |
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446 oop_store((oop*)addr, x); |
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447 } |
| 0 | 448 OrderAccess::fence(); |
| 449 UNSAFE_END | |
| 450 | |
| 451 UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) | |
| 452 UnsafeWrapper("Unsafe_SetOrderedLong"); | |
| 10235 | 453 #ifdef SUPPORTS_NATIVE_CX8 |
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454 SET_FIELD_VOLATILE(obj, offset, jlong, x); |
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455 #else |
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456 // Keep old code for platforms which may not have atomic long (8 bytes) instructions |
| 0 | 457 { |
| 458 if (VM_Version::supports_cx8()) { | |
| 459 SET_FIELD_VOLATILE(obj, offset, jlong, x); | |
| 460 } | |
| 461 else { | |
| 462 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 463 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 464 ObjectLocker ol(p, THREAD); | |
| 465 *addr = x; | |
| 466 } | |
| 467 } | |
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468 #endif |
| 0 | 469 UNSAFE_END |
| 470 | |
| 7425 | 471 UNSAFE_ENTRY(void, Unsafe_LoadFence(JNIEnv *env, jobject unsafe)) |
| 472 UnsafeWrapper("Unsafe_LoadFence"); | |
| 473 OrderAccess::acquire(); | |
| 474 UNSAFE_END | |
| 475 | |
| 476 UNSAFE_ENTRY(void, Unsafe_StoreFence(JNIEnv *env, jobject unsafe)) | |
| 477 UnsafeWrapper("Unsafe_StoreFence"); | |
| 478 OrderAccess::release(); | |
| 479 UNSAFE_END | |
| 480 | |
| 481 UNSAFE_ENTRY(void, Unsafe_FullFence(JNIEnv *env, jobject unsafe)) | |
| 482 UnsafeWrapper("Unsafe_FullFence"); | |
| 483 OrderAccess::fence(); | |
| 484 UNSAFE_END | |
| 485 | |
| 0 | 486 ////// Data in the C heap. |
| 487 | |
| 488 // Note: These do not throw NullPointerException for bad pointers. | |
| 489 // They just crash. Only a oop base pointer can generate a NullPointerException. | |
| 490 // | |
| 491 #define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ | |
| 492 \ | |
| 493 UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ | |
| 494 UnsafeWrapper("Unsafe_GetNative"#Type); \ | |
| 495 void* p = addr_from_java(addr); \ | |
| 496 JavaThread* t = JavaThread::current(); \ | |
| 497 t->set_doing_unsafe_access(true); \ | |
| 498 java_type x = *(volatile native_type*)p; \ | |
| 499 t->set_doing_unsafe_access(false); \ | |
| 500 return x; \ | |
| 501 UNSAFE_END \ | |
| 502 \ | |
| 503 UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ | |
| 504 UnsafeWrapper("Unsafe_SetNative"#Type); \ | |
| 505 JavaThread* t = JavaThread::current(); \ | |
| 506 t->set_doing_unsafe_access(true); \ | |
| 507 void* p = addr_from_java(addr); \ | |
| 508 *(volatile native_type*)p = x; \ | |
| 509 t->set_doing_unsafe_access(false); \ | |
| 510 UNSAFE_END \ | |
| 511 \ | |
| 512 // END DEFINE_GETSETNATIVE. | |
| 513 | |
| 514 DEFINE_GETSETNATIVE(jbyte, Byte, signed char) | |
| 515 DEFINE_GETSETNATIVE(jshort, Short, signed short); | |
| 516 DEFINE_GETSETNATIVE(jchar, Char, unsigned short); | |
| 517 DEFINE_GETSETNATIVE(jint, Int, jint); | |
| 518 // no long -- handled specially | |
| 519 DEFINE_GETSETNATIVE(jfloat, Float, float); | |
| 520 DEFINE_GETSETNATIVE(jdouble, Double, double); | |
| 521 | |
| 522 #undef DEFINE_GETSETNATIVE | |
| 523 | |
| 524 UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 525 UnsafeWrapper("Unsafe_GetNativeLong"); | |
| 526 JavaThread* t = JavaThread::current(); | |
| 527 // We do it this way to avoid problems with access to heap using 64 | |
| 528 // bit loads, as jlong in heap could be not 64-bit aligned, and on | |
| 529 // some CPUs (SPARC) it leads to SIGBUS. | |
| 530 t->set_doing_unsafe_access(true); | |
| 531 void* p = addr_from_java(addr); | |
| 532 jlong x; | |
| 533 if (((intptr_t)p & 7) == 0) { | |
| 534 // jlong is aligned, do a volatile access | |
| 535 x = *(volatile jlong*)p; | |
| 536 } else { | |
| 537 jlong_accessor acc; | |
| 538 acc.words[0] = ((volatile jint*)p)[0]; | |
| 539 acc.words[1] = ((volatile jint*)p)[1]; | |
| 540 x = acc.long_value; | |
| 541 } | |
| 542 t->set_doing_unsafe_access(false); | |
| 543 return x; | |
| 544 UNSAFE_END | |
| 545 | |
| 546 UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
| 547 UnsafeWrapper("Unsafe_SetNativeLong"); | |
| 548 JavaThread* t = JavaThread::current(); | |
| 549 // see comment for Unsafe_GetNativeLong | |
| 550 t->set_doing_unsafe_access(true); | |
| 551 void* p = addr_from_java(addr); | |
| 552 if (((intptr_t)p & 7) == 0) { | |
| 553 // jlong is aligned, do a volatile access | |
| 554 *(volatile jlong*)p = x; | |
| 555 } else { | |
| 556 jlong_accessor acc; | |
| 557 acc.long_value = x; | |
| 558 ((volatile jint*)p)[0] = acc.words[0]; | |
| 559 ((volatile jint*)p)[1] = acc.words[1]; | |
| 560 } | |
| 561 t->set_doing_unsafe_access(false); | |
| 562 UNSAFE_END | |
| 563 | |
| 564 | |
| 565 UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 566 UnsafeWrapper("Unsafe_GetNativeAddress"); | |
| 567 void* p = addr_from_java(addr); | |
| 568 return addr_to_java(*(void**)p); | |
| 569 UNSAFE_END | |
| 570 | |
| 571 UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) | |
| 572 UnsafeWrapper("Unsafe_SetNativeAddress"); | |
| 573 void* p = addr_from_java(addr); | |
| 574 *(void**)p = addr_from_java(x); | |
| 575 UNSAFE_END | |
| 576 | |
| 577 | |
| 578 ////// Allocation requests | |
| 579 | |
| 580 UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) | |
| 581 UnsafeWrapper("Unsafe_AllocateInstance"); | |
| 582 { | |
| 583 ThreadToNativeFromVM ttnfv(thread); | |
| 584 return env->AllocObject(cls); | |
| 585 } | |
| 586 UNSAFE_END | |
| 587 | |
| 588 UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) | |
| 589 UnsafeWrapper("Unsafe_AllocateMemory"); | |
| 590 size_t sz = (size_t)size; | |
| 591 if (sz != (julong)size || size < 0) { | |
| 592 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 593 } | |
| 594 if (sz == 0) { | |
| 595 return 0; | |
| 596 } | |
| 597 sz = round_to(sz, HeapWordSize); | |
| 6197 | 598 void* x = os::malloc(sz, mtInternal); |
| 0 | 599 if (x == NULL) { |
| 600 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
| 601 } | |
| 602 //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); | |
| 603 return addr_to_java(x); | |
| 604 UNSAFE_END | |
| 605 | |
| 606 UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) | |
| 607 UnsafeWrapper("Unsafe_ReallocateMemory"); | |
| 608 void* p = addr_from_java(addr); | |
| 609 size_t sz = (size_t)size; | |
| 610 if (sz != (julong)size || size < 0) { | |
| 611 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 612 } | |
| 613 if (sz == 0) { | |
| 614 os::free(p); | |
| 615 return 0; | |
| 616 } | |
| 617 sz = round_to(sz, HeapWordSize); | |
| 6197 | 618 void* x = (p == NULL) ? os::malloc(sz, mtInternal) : os::realloc(p, sz, mtInternal); |
| 0 | 619 if (x == NULL) { |
| 620 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); | |
| 621 } | |
| 622 return addr_to_java(x); | |
| 623 UNSAFE_END | |
| 624 | |
| 625 UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) | |
| 626 UnsafeWrapper("Unsafe_FreeMemory"); | |
| 627 void* p = addr_from_java(addr); | |
| 628 if (p == NULL) { | |
| 629 return; | |
| 630 } | |
| 631 os::free(p); | |
| 632 UNSAFE_END | |
| 633 | |
| 634 UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) | |
| 635 UnsafeWrapper("Unsafe_SetMemory"); | |
| 636 size_t sz = (size_t)size; | |
| 637 if (sz != (julong)size || size < 0) { | |
| 638 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 639 } | |
| 640 char* p = (char*) addr_from_java(addr); | |
| 641 Copy::fill_to_memory_atomic(p, sz, value); | |
| 642 UNSAFE_END | |
| 643 | |
| 644 UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) | |
| 645 UnsafeWrapper("Unsafe_SetMemory"); | |
| 646 size_t sz = (size_t)size; | |
| 647 if (sz != (julong)size || size < 0) { | |
| 648 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 649 } | |
| 650 oop base = JNIHandles::resolve(obj); | |
| 651 void* p = index_oop_from_field_offset_long(base, offset); | |
| 652 Copy::fill_to_memory_atomic(p, sz, value); | |
| 653 UNSAFE_END | |
| 654 | |
| 655 UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) | |
| 656 UnsafeWrapper("Unsafe_CopyMemory"); | |
| 657 if (size == 0) { | |
| 658 return; | |
| 659 } | |
| 660 size_t sz = (size_t)size; | |
| 661 if (sz != (julong)size || size < 0) { | |
| 662 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 663 } | |
| 664 void* src = addr_from_java(srcAddr); | |
| 665 void* dst = addr_from_java(dstAddr); | |
| 666 Copy::conjoint_memory_atomic(src, dst, sz); | |
| 667 UNSAFE_END | |
| 668 | |
| 669 UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) | |
| 670 UnsafeWrapper("Unsafe_CopyMemory"); | |
| 671 if (size == 0) { | |
| 672 return; | |
| 673 } | |
| 674 size_t sz = (size_t)size; | |
| 675 if (sz != (julong)size || size < 0) { | |
| 676 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 677 } | |
| 678 oop srcp = JNIHandles::resolve(srcObj); | |
| 679 oop dstp = JNIHandles::resolve(dstObj); | |
| 680 if (dstp != NULL && !dstp->is_typeArray()) { | |
| 681 // NYI: This works only for non-oop arrays at present. | |
| 682 // Generalizing it would be reasonable, but requires card marking. | |
| 683 // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. | |
| 684 THROW(vmSymbols::java_lang_IllegalArgumentException()); | |
| 685 } | |
| 686 void* src = index_oop_from_field_offset_long(srcp, srcOffset); | |
| 687 void* dst = index_oop_from_field_offset_long(dstp, dstOffset); | |
| 688 Copy::conjoint_memory_atomic(src, dst, sz); | |
| 689 UNSAFE_END | |
| 690 | |
| 691 | |
| 692 ////// Random queries | |
| 693 | |
| 694 // See comment at file start about UNSAFE_LEAF | |
| 695 //UNSAFE_LEAF(jint, Unsafe_AddressSize()) | |
| 696 UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) | |
| 697 UnsafeWrapper("Unsafe_AddressSize"); | |
| 698 return sizeof(void*); | |
| 699 UNSAFE_END | |
| 700 | |
| 701 // See comment at file start about UNSAFE_LEAF | |
| 702 //UNSAFE_LEAF(jint, Unsafe_PageSize()) | |
| 703 UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) | |
| 704 UnsafeWrapper("Unsafe_PageSize"); | |
| 705 return os::vm_page_size(); | |
| 706 UNSAFE_END | |
| 707 | |
| 708 jint find_field_offset(jobject field, int must_be_static, TRAPS) { | |
| 709 if (field == NULL) { | |
| 710 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 711 } | |
| 712 | |
| 713 oop reflected = JNIHandles::resolve_non_null(field); | |
| 714 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
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715 Klass* k = java_lang_Class::as_Klass(mirror); |
| 0 | 716 int slot = java_lang_reflect_Field::slot(reflected); |
| 717 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
| 718 | |
| 719 if (must_be_static >= 0) { | |
| 720 int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); | |
| 721 if (must_be_static != really_is_static) { | |
| 722 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 723 } | |
| 724 } | |
| 725 | |
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726 int offset = InstanceKlass::cast(k)->field_offset(slot); |
| 0 | 727 return field_offset_from_byte_offset(offset); |
| 728 } | |
| 729 | |
| 730 UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 731 UnsafeWrapper("Unsafe_ObjectFieldOffset"); | |
| 732 return find_field_offset(field, 0, THREAD); | |
| 733 UNSAFE_END | |
| 734 | |
| 735 UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 736 UnsafeWrapper("Unsafe_StaticFieldOffset"); | |
| 737 return find_field_offset(field, 1, THREAD); | |
| 738 UNSAFE_END | |
| 739 | |
| 740 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) | |
| 741 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
| 742 // Note: In this VM implementation, a field address is always a short | |
| 743 // offset from the base of a a klass metaobject. Thus, the full dynamic | |
| 744 // range of the return type is never used. However, some implementations | |
| 745 // might put the static field inside an array shared by many classes, | |
| 746 // or even at a fixed address, in which case the address could be quite | |
| 747 // large. In that last case, this function would return NULL, since | |
| 748 // the address would operate alone, without any base pointer. | |
| 749 | |
| 750 if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 751 | |
| 752 oop reflected = JNIHandles::resolve_non_null(field); | |
| 753 oop mirror = java_lang_reflect_Field::clazz(reflected); | |
| 754 int modifiers = java_lang_reflect_Field::modifiers(reflected); | |
| 755 | |
| 756 if ((modifiers & JVM_ACC_STATIC) == 0) { | |
| 757 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); | |
| 758 } | |
| 759 | |
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760 return JNIHandles::make_local(env, mirror); |
| 0 | 761 UNSAFE_END |
| 762 | |
| 763 //@deprecated | |
| 764 UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) | |
| 765 UnsafeWrapper("Unsafe_FieldOffset"); | |
| 766 // tries (but fails) to be polymorphic between static and non-static: | |
| 767 jlong offset = find_field_offset(field, -1, THREAD); | |
| 768 guarantee(offset == (jint)offset, "offset fits in 32 bits"); | |
| 769 return (jint)offset; | |
| 770 UNSAFE_END | |
| 771 | |
| 772 //@deprecated | |
| 773 UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) | |
| 774 UnsafeWrapper("Unsafe_StaticFieldBase"); | |
| 775 if (clazz == NULL) { | |
| 776 THROW_0(vmSymbols::java_lang_NullPointerException()); | |
| 777 } | |
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778 return JNIHandles::make_local(env, JNIHandles::resolve_non_null(clazz)); |
| 0 | 779 UNSAFE_END |
| 780 | |
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781 UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
| 0 | 782 UnsafeWrapper("Unsafe_EnsureClassInitialized"); |
| 783 if (clazz == NULL) { | |
| 784 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 785 } | |
| 786 oop mirror = JNIHandles::resolve_non_null(clazz); | |
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787 |
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788 Klass* klass = java_lang_Class::as_Klass(mirror); |
| 6983 | 789 if (klass != NULL && klass->should_be_initialized()) { |
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790 InstanceKlass* k = InstanceKlass::cast(klass); |
| 0 | 791 k->initialize(CHECK); |
| 792 } | |
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793 } |
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794 UNSAFE_END |
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795 |
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796 UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) { |
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797 UnsafeWrapper("Unsafe_ShouldBeInitialized"); |
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798 if (clazz == NULL) { |
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799 THROW_(vmSymbols::java_lang_NullPointerException(), false); |
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800 } |
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801 oop mirror = JNIHandles::resolve_non_null(clazz); |
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802 Klass* klass = java_lang_Class::as_Klass(mirror); |
| 6983 | 803 if (klass != NULL && klass->should_be_initialized()) { |
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804 return true; |
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805 } |
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806 return false; |
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807 } |
| 0 | 808 UNSAFE_END |
| 809 | |
| 810 static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { | |
| 811 if (acls == NULL) { | |
| 812 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 813 } | |
| 814 oop mirror = JNIHandles::resolve_non_null(acls); | |
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815 Klass* k = java_lang_Class::as_Klass(mirror); |
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816 if (k == NULL || !k->oop_is_array()) { |
| 0 | 817 THROW(vmSymbols::java_lang_InvalidClassException()); |
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818 } else if (k->oop_is_objArray()) { |
| 0 | 819 base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); |
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820 scale = heapOopSize; |
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821 } else if (k->oop_is_typeArray()) { |
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822 TypeArrayKlass* tak = TypeArrayKlass::cast(k); |
| 0 | 823 base = tak->array_header_in_bytes(); |
| 824 assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); | |
| 825 scale = (1 << tak->log2_element_size()); | |
| 826 } else { | |
| 827 ShouldNotReachHere(); | |
| 828 } | |
| 829 } | |
| 830 | |
| 831 UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) | |
| 832 UnsafeWrapper("Unsafe_ArrayBaseOffset"); | |
| 833 int base, scale; | |
| 834 getBaseAndScale(base, scale, acls, CHECK_0); | |
| 835 return field_offset_from_byte_offset(base); | |
| 836 UNSAFE_END | |
| 837 | |
| 838 | |
| 839 UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) | |
| 840 UnsafeWrapper("Unsafe_ArrayIndexScale"); | |
| 841 int base, scale; | |
| 842 getBaseAndScale(base, scale, acls, CHECK_0); | |
| 843 // This VM packs both fields and array elements down to the byte. | |
| 844 // But watch out: If this changes, so that array references for | |
| 845 // a given primitive type (say, T_BOOLEAN) use different memory units | |
| 846 // than fields, this method MUST return zero for such arrays. | |
| 847 // For example, the VM used to store sub-word sized fields in full | |
| 848 // words in the object layout, so that accessors like getByte(Object,int) | |
| 849 // did not really do what one might expect for arrays. Therefore, | |
| 850 // this function used to report a zero scale factor, so that the user | |
| 851 // would know not to attempt to access sub-word array elements. | |
| 852 // // Code for unpacked fields: | |
| 853 // if (scale < wordSize) return 0; | |
| 854 | |
| 855 // The following allows for a pretty general fieldOffset cookie scheme, | |
| 856 // but requires it to be linear in byte offset. | |
| 857 return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); | |
| 858 UNSAFE_END | |
| 859 | |
| 860 | |
| 861 static inline void throw_new(JNIEnv *env, const char *ename) { | |
| 862 char buf[100]; | |
| 863 strcpy(buf, "java/lang/"); | |
| 864 strcat(buf, ename); | |
| 865 jclass cls = env->FindClass(buf); | |
|
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866 if (env->ExceptionCheck()) { |
|
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|
867 env->ExceptionClear(); |
|
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|
868 tty->print_cr("Unsafe: cannot throw %s because FindClass has failed", buf); |
|
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|
869 return; |
|
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|
870 } |
| 0 | 871 char* msg = NULL; |
| 872 env->ThrowNew(cls, msg); | |
| 873 } | |
| 874 | |
|
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875 static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { |
| 0 | 876 { |
| 877 // Code lifted from JDK 1.3 ClassLoader.c | |
| 878 | |
| 879 jbyte *body; | |
| 880 char *utfName; | |
| 881 jclass result = 0; | |
| 882 char buf[128]; | |
| 883 | |
| 884 if (UsePerfData) { | |
| 885 ClassLoader::unsafe_defineClassCallCounter()->inc(); | |
| 886 } | |
| 887 | |
| 888 if (data == NULL) { | |
| 889 throw_new(env, "NullPointerException"); | |
| 890 return 0; | |
| 891 } | |
| 892 | |
| 893 /* Work around 4153825. malloc crashes on Solaris when passed a | |
| 894 * negative size. | |
| 895 */ | |
| 896 if (length < 0) { | |
| 897 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
| 898 return 0; | |
| 899 } | |
| 900 | |
| 6197 | 901 body = NEW_C_HEAP_ARRAY(jbyte, length, mtInternal); |
| 0 | 902 |
| 903 if (body == 0) { | |
| 904 throw_new(env, "OutOfMemoryError"); | |
| 905 return 0; | |
| 906 } | |
| 907 | |
| 908 env->GetByteArrayRegion(data, offset, length, body); | |
| 909 | |
| 910 if (env->ExceptionOccurred()) | |
| 911 goto free_body; | |
| 912 | |
| 913 if (name != NULL) { | |
| 914 uint len = env->GetStringUTFLength(name); | |
| 915 int unicode_len = env->GetStringLength(name); | |
| 916 if (len >= sizeof(buf)) { | |
| 6197 | 917 utfName = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); |
| 0 | 918 if (utfName == NULL) { |
| 919 throw_new(env, "OutOfMemoryError"); | |
| 920 goto free_body; | |
| 921 } | |
| 922 } else { | |
| 923 utfName = buf; | |
| 924 } | |
| 925 env->GetStringUTFRegion(name, 0, unicode_len, utfName); | |
| 926 //VerifyFixClassname(utfName); | |
| 927 for (uint i = 0; i < len; i++) { | |
| 928 if (utfName[i] == '.') utfName[i] = '/'; | |
| 929 } | |
| 930 } else { | |
| 931 utfName = NULL; | |
| 932 } | |
| 933 | |
| 934 result = JVM_DefineClass(env, utfName, loader, body, length, pd); | |
| 935 | |
| 936 if (utfName && utfName != buf) | |
| 6197 | 937 FREE_C_HEAP_ARRAY(char, utfName, mtInternal); |
| 0 | 938 |
| 939 free_body: | |
| 6197 | 940 FREE_C_HEAP_ARRAY(jbyte, body, mtInternal); |
| 0 | 941 return result; |
| 942 } | |
| 943 } | |
| 944 | |
| 945 | |
|
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946 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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947 UnsafeWrapper("Unsafe_DefineClass"); |
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948 { |
|
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949 ThreadToNativeFromVM ttnfv(thread); |
|
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950 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
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951 } |
|
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|
952 UNSAFE_END |
|
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953 |
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954 |
| 0 | 955 UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) |
| 956 UnsafeWrapper("Unsafe_DefineClass"); | |
| 957 { | |
| 958 ThreadToNativeFromVM ttnfv(thread); | |
| 959 | |
| 960 int depthFromDefineClass0 = 1; | |
| 961 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); | |
| 962 jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller); | |
| 963 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); | |
| 964 | |
|
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965 return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
| 0 | 966 } |
| 967 UNSAFE_END | |
| 968 | |
| 969 | |
|
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970 #define DAC_Args CLS"[B["OBJ |
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971 // define a class but do not make it known to the class loader or system dictionary |
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972 // - host_class: supplies context for linkage, access control, protection domain, and class loader |
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973 // - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
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974 // - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
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975 |
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976 // When you load an anonymous class U, it works as if you changed its name just before loading, |
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977 // to a name that you will never use again. Since the name is lost, no other class can directly |
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978 // link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
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979 // through java.lang.Class methods like Class.newInstance. |
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980 |
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981 // Access checks for linkage sites within U continue to follow the same rules as for named classes. |
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982 // The package of an anonymous class is given by the package qualifier on the name under which it was loaded. |
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983 // An anonymous class also has special privileges to access any member of its host class. |
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984 // This is the main reason why this loading operation is unsafe. The purpose of this is to |
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985 // allow language implementations to simulate "open classes"; a host class in effect gets |
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986 // new code when an anonymous class is loaded alongside it. A less convenient but more |
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987 // standard way to do this is with reflection, which can also be set to ignore access |
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988 // restrictions. |
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989 |
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990 // Access into an anonymous class is possible only through reflection. Therefore, there |
|
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991 // are no special access rules for calling into an anonymous class. The relaxed access |
|
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992 // rule for the host class is applied in the opposite direction: A host class reflectively |
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993 // access one of its anonymous classes. |
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994 |
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995 // If you load the same bytecodes twice, you get two different classes. You can reload |
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996 // the same bytecodes with or without varying CP patches. |
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997 |
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998 // By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
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999 // The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
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1000 // The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
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1001 |
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1002 // This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
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1003 // an outer class (so that U2 is an anonymous inner class of anonymous U1). |
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1004 // It is not possible for a named class, or an older anonymous class, to refer by |
|
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1005 // name (via its CP) to a newer anonymous class. |
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1006 |
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1007 // CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
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1008 // or type descriptors used in the loaded anonymous class. |
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1009 |
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1010 // Finally, CP patching may be used to introduce "live" objects into the constant pool, |
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1011 // instead of "dead" strings. A compiled statement like println((Object)"hello") can |
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1012 // be changed to println(greeting), where greeting is an arbitrary object created before |
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1013 // the anonymous class is loaded. This is useful in dynamic languages, in which |
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1014 // various kinds of metaobjects must be introduced as constants into bytecode. |
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1015 // Note the cast (Object), which tells the verifier to expect an arbitrary object, |
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1016 // not just a literal string. For such ldc instructions, the verifier uses the |
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1017 // type Object instead of String, if the loaded constant is not in fact a String. |
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1018 |
|
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1019 static instanceKlassHandle |
|
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1020 Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
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1021 jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
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1022 HeapWord* *temp_alloc, |
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1023 TRAPS) { |
|
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1024 |
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1025 if (UsePerfData) { |
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1026 ClassLoader::unsafe_defineClassCallCounter()->inc(); |
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1027 } |
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1028 |
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1029 if (data == NULL) { |
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1030 THROW_0(vmSymbols::java_lang_NullPointerException()); |
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1031 } |
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1032 |
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1033 jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
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1034 jint word_length = (length + sizeof(HeapWord)-1) / sizeof(HeapWord); |
| 6197 | 1035 HeapWord* body = NEW_C_HEAP_ARRAY(HeapWord, word_length, mtInternal); |
|
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1036 if (body == NULL) { |
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1037 THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
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1038 } |
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1039 |
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1040 // caller responsible to free it: |
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1041 (*temp_alloc) = body; |
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1042 |
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1043 { |
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1044 jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
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1045 Copy::conjoint_words((HeapWord*) array_base, body, word_length); |
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1046 } |
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1047 |
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1048 u1* class_bytes = (u1*) body; |
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1049 int class_bytes_length = (int) length; |
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1050 if (class_bytes_length < 0) class_bytes_length = 0; |
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1051 if (class_bytes == NULL |
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1052 || host_class == NULL |
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1053 || length != class_bytes_length) |
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1054 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
|
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1055 |
|
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1056 objArrayHandle cp_patches_h; |
|
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1057 if (cp_patches_jh != NULL) { |
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1058 oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
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1059 if (!p->is_objArray()) |
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1060 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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1061 cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
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1062 } |
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1063 |
|
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1064 KlassHandle host_klass(THREAD, java_lang_Class::as_Klass(JNIHandles::resolve_non_null(host_class))); |
|
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1065 const char* host_source = host_klass->external_name(); |
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1066 Handle host_loader(THREAD, host_klass->class_loader()); |
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1067 Handle host_domain(THREAD, host_klass->protection_domain()); |
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1068 |
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1069 GrowableArray<Handle>* cp_patches = NULL; |
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1070 if (cp_patches_h.not_null()) { |
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1071 int alen = cp_patches_h->length(); |
|
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1072 for (int i = alen-1; i >= 0; i--) { |
|
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1073 oop p = cp_patches_h->obj_at(i); |
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1074 if (p != NULL) { |
|
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1075 Handle patch(THREAD, p); |
|
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1076 if (cp_patches == NULL) |
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1077 cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
|
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1078 cp_patches->at_put(i, patch); |
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1079 } |
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1080 } |
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1081 } |
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1082 |
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1083 ClassFileStream st(class_bytes, class_bytes_length, (char*) host_source); |
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1084 |
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1085 instanceKlassHandle anon_klass; |
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1086 { |
|
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1087 Symbol* no_class_name = NULL; |
|
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1088 Klass* anonk = SystemDictionary::parse_stream(no_class_name, |
|
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1089 host_loader, host_domain, |
|
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1090 &st, host_klass, cp_patches, |
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1091 CHECK_NULL); |
|
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1092 if (anonk == NULL) return NULL; |
|
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1093 anon_klass = instanceKlassHandle(THREAD, anonk); |
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1094 } |
|
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1095 |
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1096 return anon_klass; |
|
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1097 } |
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1098 |
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1099 UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) |
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1100 { |
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1101 instanceKlassHandle anon_klass; |
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1102 jobject res_jh = NULL; |
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1103 |
|
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1104 UnsafeWrapper("Unsafe_DefineAnonymousClass"); |
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1105 ResourceMark rm(THREAD); |
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1106 |
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1107 HeapWord* temp_alloc = NULL; |
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1108 |
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1109 anon_klass = Unsafe_DefineAnonymousClass_impl(env, host_class, data, |
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1110 cp_patches_jh, |
|
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1111 &temp_alloc, THREAD); |
|
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1112 if (anon_klass() != NULL) |
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1113 res_jh = JNIHandles::make_local(env, anon_klass->java_mirror()); |
|
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1114 |
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1115 // try/finally clause: |
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1116 if (temp_alloc != NULL) { |
| 6197 | 1117 FREE_C_HEAP_ARRAY(HeapWord, temp_alloc, mtInternal); |
|
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1118 } |
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1119 |
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1120 // The anonymous class loader data has been artificially been kept alive to |
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1121 // this point. The mirror and any instances of this class have to keep |
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1122 // it alive afterwards. |
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1123 if (anon_klass() != NULL) { |
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1124 anon_klass->class_loader_data()->set_keep_alive(false); |
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1125 } |
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1126 |
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1127 // let caller initialize it as needed... |
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1128 |
|
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1129 return (jclass) res_jh; |
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1130 } |
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1131 UNSAFE_END |
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1132 |
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1133 |
| 0 | 1134 |
| 1135 UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1136 UnsafeWrapper("Unsafe_MonitorEnter"); | |
| 1137 { | |
| 1138 if (jobj == NULL) { | |
| 1139 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1140 } | |
| 1141 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
| 1142 ObjectSynchronizer::jni_enter(obj, CHECK); | |
| 1143 } | |
| 1144 UNSAFE_END | |
| 1145 | |
| 1146 | |
| 1147 UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1148 UnsafeWrapper("Unsafe_TryMonitorEnter"); | |
| 1149 { | |
| 1150 if (jobj == NULL) { | |
| 1151 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); | |
| 1152 } | |
| 1153 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); | |
| 1154 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); | |
| 1155 return (res ? JNI_TRUE : JNI_FALSE); | |
| 1156 } | |
| 1157 UNSAFE_END | |
| 1158 | |
| 1159 | |
| 1160 UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) | |
| 1161 UnsafeWrapper("Unsafe_MonitorExit"); | |
| 1162 { | |
| 1163 if (jobj == NULL) { | |
| 1164 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1165 } | |
| 1166 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); | |
| 1167 ObjectSynchronizer::jni_exit(obj(), CHECK); | |
| 1168 } | |
| 1169 UNSAFE_END | |
| 1170 | |
| 1171 | |
| 1172 UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) | |
| 1173 UnsafeWrapper("Unsafe_ThrowException"); | |
| 1174 { | |
| 1175 ThreadToNativeFromVM ttnfv(thread); | |
| 1176 env->Throw(thr); | |
| 1177 } | |
| 1178 UNSAFE_END | |
| 1179 | |
| 1180 // JSR166 ------------------------------------------------------------------ | |
| 1181 | |
| 1182 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) | |
| 1183 UnsafeWrapper("Unsafe_CompareAndSwapObject"); | |
| 1184 oop x = JNIHandles::resolve(x_h); | |
| 1185 oop e = JNIHandles::resolve(e_h); | |
| 1186 oop p = JNIHandles::resolve(obj); | |
|
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1187 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); |
|
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1188 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e, true); |
|
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1189 jboolean success = (res == e); |
| 0 | 1190 if (success) |
|
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1191 update_barrier_set((void*)addr, x); |
| 0 | 1192 return success; |
| 1193 UNSAFE_END | |
| 1194 | |
| 1195 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) | |
| 1196 UnsafeWrapper("Unsafe_CompareAndSwapInt"); | |
| 1197 oop p = JNIHandles::resolve(obj); | |
| 1198 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); | |
| 1199 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; | |
| 1200 UNSAFE_END | |
| 1201 | |
| 1202 UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) | |
| 1203 UnsafeWrapper("Unsafe_CompareAndSwapLong"); | |
| 1204 Handle p (THREAD, JNIHandles::resolve(obj)); | |
| 1205 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); | |
| 1206 if (VM_Version::supports_cx8()) | |
| 1207 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; | |
| 1208 else { | |
| 1209 jboolean success = false; | |
| 1210 ObjectLocker ol(p, THREAD); | |
| 1211 if (*addr == e) { *addr = x; success = true; } | |
| 1212 return success; | |
| 1213 } | |
| 1214 UNSAFE_END | |
| 1215 | |
| 1216 UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) | |
| 1217 UnsafeWrapper("Unsafe_Park"); | |
| 10405 | 1218 EventThreadPark event; |
| 4006 | 1219 #ifndef USDT2 |
|
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1220 HS_DTRACE_PROBE3(hotspot, thread__park__begin, thread->parker(), (int) isAbsolute, time); |
| 4006 | 1221 #else /* USDT2 */ |
| 1222 HOTSPOT_THREAD_PARK_BEGIN( | |
| 1223 (uintptr_t) thread->parker(), (int) isAbsolute, time); | |
| 1224 #endif /* USDT2 */ | |
| 0 | 1225 JavaThreadParkedState jtps(thread, time != 0); |
| 1226 thread->parker()->park(isAbsolute != 0, time); | |
| 4006 | 1227 #ifndef USDT2 |
|
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1228 HS_DTRACE_PROBE1(hotspot, thread__park__end, thread->parker()); |
| 4006 | 1229 #else /* USDT2 */ |
| 1230 HOTSPOT_THREAD_PARK_END( | |
| 1231 (uintptr_t) thread->parker()); | |
| 1232 #endif /* USDT2 */ | |
| 10405 | 1233 if (event.should_commit()) { |
| 1234 oop obj = thread->current_park_blocker(); | |
|
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1235 event.set_klass((obj != NULL) ? obj->klass() : NULL); |
| 10405 | 1236 event.set_timeout(time); |
|
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|
1237 event.set_address((obj != NULL) ? (TYPE_ADDRESS) cast_from_oop<uintptr_t>(obj) : 0); |
| 10405 | 1238 event.commit(); |
| 1239 } | |
| 0 | 1240 UNSAFE_END |
| 1241 | |
| 1242 UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) | |
| 1243 UnsafeWrapper("Unsafe_Unpark"); | |
| 1244 Parker* p = NULL; | |
| 1245 if (jthread != NULL) { | |
| 1246 oop java_thread = JNIHandles::resolve_non_null(jthread); | |
| 1247 if (java_thread != NULL) { | |
| 1248 jlong lp = java_lang_Thread::park_event(java_thread); | |
| 1249 if (lp != 0) { | |
| 1250 // This cast is OK even though the jlong might have been read | |
| 1251 // non-atomically on 32bit systems, since there, one word will | |
| 1252 // always be zero anyway and the value set is always the same | |
| 1253 p = (Parker*)addr_from_java(lp); | |
| 1254 } else { | |
| 1255 // Grab lock if apparently null or using older version of library | |
| 1256 MutexLocker mu(Threads_lock); | |
| 1257 java_thread = JNIHandles::resolve_non_null(jthread); | |
| 1258 if (java_thread != NULL) { | |
| 1259 JavaThread* thr = java_lang_Thread::thread(java_thread); | |
| 1260 if (thr != NULL) { | |
| 1261 p = thr->parker(); | |
| 1262 if (p != NULL) { // Bind to Java thread for next time. | |
| 1263 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); | |
| 1264 } | |
| 1265 } | |
| 1266 } | |
| 1267 } | |
| 1268 } | |
| 1269 } | |
| 1270 if (p != NULL) { | |
| 4006 | 1271 #ifndef USDT2 |
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1272 HS_DTRACE_PROBE1(hotspot, thread__unpark, p); |
| 4006 | 1273 #else /* USDT2 */ |
| 1274 HOTSPOT_THREAD_UNPARK( | |
| 1275 (uintptr_t) p); | |
| 1276 #endif /* USDT2 */ | |
| 0 | 1277 p->unpark(); |
| 1278 } | |
| 1279 UNSAFE_END | |
| 1280 | |
| 1281 UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) | |
| 1282 UnsafeWrapper("Unsafe_Loadavg"); | |
| 1283 const int max_nelem = 3; | |
| 1284 double la[max_nelem]; | |
| 1285 jint ret; | |
| 1286 | |
| 1287 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); | |
| 1288 assert(a->is_typeArray(), "must be type array"); | |
| 1289 | |
| 1290 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { | |
| 1291 ThreadToNativeFromVM ttnfv(thread); | |
| 1292 throw_new(env, "ArrayIndexOutOfBoundsException"); | |
| 1293 return -1; | |
| 1294 } | |
| 1295 | |
| 1296 ret = os::loadavg(la, nelem); | |
| 1297 if (ret == -1) return -1; | |
| 1298 | |
| 1299 // if successful, ret is the number of samples actually retrieved. | |
| 1300 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); | |
| 1301 switch(ret) { | |
| 1302 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through | |
| 1303 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through | |
| 1304 case 1: a->double_at_put(0, (jdouble)la[0]); break; | |
| 1305 } | |
| 1306 return ret; | |
| 1307 UNSAFE_END | |
| 1308 | |
| 1309 UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
| 1310 UnsafeWrapper("Unsafe_PrefetchRead"); | |
| 1311 oop p = JNIHandles::resolve(obj); | |
| 1312 void* addr = index_oop_from_field_offset_long(p, 0); | |
| 1313 Prefetch::read(addr, (intx)offset); | |
| 1314 UNSAFE_END | |
| 1315 | |
| 1316 UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) | |
| 1317 UnsafeWrapper("Unsafe_PrefetchWrite"); | |
| 1318 oop p = JNIHandles::resolve(obj); | |
| 1319 void* addr = index_oop_from_field_offset_long(p, 0); | |
| 1320 Prefetch::write(addr, (intx)offset); | |
| 1321 UNSAFE_END | |
| 1322 | |
| 1323 | |
| 1324 /// JVM_RegisterUnsafeMethods | |
| 1325 | |
| 1326 #define ADR "J" | |
| 1327 | |
| 1328 #define LANG "Ljava/lang/" | |
| 1329 | |
| 1330 #define OBJ LANG"Object;" | |
| 1331 #define CLS LANG"Class;" | |
| 1332 #define CTR LANG"reflect/Constructor;" | |
| 1333 #define FLD LANG"reflect/Field;" | |
| 1334 #define MTH LANG"reflect/Method;" | |
| 1335 #define THR LANG"Throwable;" | |
| 1336 | |
| 1337 #define DC0_Args LANG"String;[BII" | |
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1338 #define DC_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" |
| 0 | 1339 |
| 1340 #define CC (char*) /*cast a literal from (const char*)*/ | |
| 1341 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) | |
| 1342 | |
| 1343 // define deprecated accessors for compabitility with 1.4.0 | |
| 1344 #define DECLARE_GETSETOOP_140(Boolean, Z) \ | |
| 1345 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ | |
| 1346 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} | |
| 1347 | |
| 1348 // Note: In 1.4.1, getObject and kin take both int and long offsets. | |
| 1349 #define DECLARE_GETSETOOP_141(Boolean, Z) \ | |
| 1350 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
| 1351 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} | |
| 1352 | |
| 1353 // Note: In 1.5.0, there are volatile versions too | |
| 1354 #define DECLARE_GETSETOOP(Boolean, Z) \ | |
| 1355 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ | |
| 1356 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ | |
| 1357 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ | |
| 1358 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} | |
| 1359 | |
| 1360 | |
| 1361 #define DECLARE_GETSETNATIVE(Byte, B) \ | |
| 1362 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ | |
| 1363 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} | |
| 1364 | |
| 1365 | |
| 1366 | |
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1367 // These are the methods for 1.4.0 |
| 0 | 1368 static JNINativeMethod methods_140[] = { |
| 1369 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, | |
| 1370 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, | |
| 1371 | |
| 1372 DECLARE_GETSETOOP_140(Boolean, Z), | |
| 1373 DECLARE_GETSETOOP_140(Byte, B), | |
| 1374 DECLARE_GETSETOOP_140(Short, S), | |
| 1375 DECLARE_GETSETOOP_140(Char, C), | |
| 1376 DECLARE_GETSETOOP_140(Int, I), | |
| 1377 DECLARE_GETSETOOP_140(Long, J), | |
| 1378 DECLARE_GETSETOOP_140(Float, F), | |
| 1379 DECLARE_GETSETOOP_140(Double, D), | |
| 1380 | |
| 1381 DECLARE_GETSETNATIVE(Byte, B), | |
| 1382 DECLARE_GETSETNATIVE(Short, S), | |
| 1383 DECLARE_GETSETNATIVE(Char, C), | |
| 1384 DECLARE_GETSETNATIVE(Int, I), | |
| 1385 DECLARE_GETSETNATIVE(Long, J), | |
| 1386 DECLARE_GETSETNATIVE(Float, F), | |
| 1387 DECLARE_GETSETNATIVE(Double, D), | |
| 1388 | |
| 1389 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1390 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1391 | |
| 1392 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1393 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1394 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1395 | |
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1396 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, |
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1397 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, |
| 0 | 1398 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
| 1399 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1400 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1401 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1402 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1403 | |
| 1404 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1405 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
| 0 | 1406 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
| 1407 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1408 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1409 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
| 1410 }; | |
| 1411 | |
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1412 // These are the methods prior to the JSR 166 changes in 1.5.0 |
| 0 | 1413 static JNINativeMethod methods_141[] = { |
| 1414 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
| 1415 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1416 | |
| 1417 DECLARE_GETSETOOP_141(Boolean, Z), | |
| 1418 DECLARE_GETSETOOP_141(Byte, B), | |
| 1419 DECLARE_GETSETOOP_141(Short, S), | |
| 1420 DECLARE_GETSETOOP_141(Char, C), | |
| 1421 DECLARE_GETSETOOP_141(Int, I), | |
| 1422 DECLARE_GETSETOOP_141(Long, J), | |
| 1423 DECLARE_GETSETOOP_141(Float, F), | |
| 1424 DECLARE_GETSETOOP_141(Double, D), | |
| 1425 | |
| 1426 DECLARE_GETSETNATIVE(Byte, B), | |
| 1427 DECLARE_GETSETNATIVE(Short, S), | |
| 1428 DECLARE_GETSETNATIVE(Char, C), | |
| 1429 DECLARE_GETSETNATIVE(Int, I), | |
| 1430 DECLARE_GETSETNATIVE(Long, J), | |
| 1431 DECLARE_GETSETNATIVE(Float, F), | |
| 1432 DECLARE_GETSETNATIVE(Double, D), | |
| 1433 | |
| 1434 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1435 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1436 | |
| 1437 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1438 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1439 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1440 | |
| 1441 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1442 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1443 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1444 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1445 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1446 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1447 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1448 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1449 | |
| 1450 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1451 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
| 0 | 1452 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
| 1453 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1454 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1455 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} | |
| 1456 | |
| 1457 }; | |
| 1458 | |
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1459 // These are the methods prior to the JSR 166 changes in 1.6.0 |
| 0 | 1460 static JNINativeMethod methods_15[] = { |
| 1461 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, | |
| 1462 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1463 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
| 1464 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
| 1465 | |
| 1466 | |
| 1467 DECLARE_GETSETOOP(Boolean, Z), | |
| 1468 DECLARE_GETSETOOP(Byte, B), | |
| 1469 DECLARE_GETSETOOP(Short, S), | |
| 1470 DECLARE_GETSETOOP(Char, C), | |
| 1471 DECLARE_GETSETOOP(Int, I), | |
| 1472 DECLARE_GETSETOOP(Long, J), | |
| 1473 DECLARE_GETSETOOP(Float, F), | |
| 1474 DECLARE_GETSETOOP(Double, D), | |
| 1475 | |
| 1476 DECLARE_GETSETNATIVE(Byte, B), | |
| 1477 DECLARE_GETSETNATIVE(Short, S), | |
| 1478 DECLARE_GETSETNATIVE(Char, C), | |
| 1479 DECLARE_GETSETNATIVE(Int, I), | |
| 1480 DECLARE_GETSETNATIVE(Long, J), | |
| 1481 DECLARE_GETSETNATIVE(Float, F), | |
| 1482 DECLARE_GETSETNATIVE(Double, D), | |
| 1483 | |
| 1484 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1485 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1486 | |
| 1487 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1488 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1489 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1490 | |
| 1491 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1492 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1493 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1494 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1495 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1496 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1497 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1498 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1499 | |
| 1500 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, | |
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1501 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
| 0 | 1502 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
| 1503 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1504 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1505 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
| 1506 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
| 1507 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
| 1508 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
| 1509 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
| 1510 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
| 1511 | |
| 1512 }; | |
| 1513 | |
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1514 // These are the methods for 1.6.0 and 1.7.0 |
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1515 static JNINativeMethod methods_16[] = { |
| 0 | 1516 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
| 1517 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, | |
| 1518 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, | |
| 1519 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, | |
| 1520 | |
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1521 DECLARE_GETSETOOP(Boolean, Z), |
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1522 DECLARE_GETSETOOP(Byte, B), |
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1523 DECLARE_GETSETOOP(Short, S), |
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1524 DECLARE_GETSETOOP(Char, C), |
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1525 DECLARE_GETSETOOP(Int, I), |
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1526 DECLARE_GETSETOOP(Long, J), |
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1527 DECLARE_GETSETOOP(Float, F), |
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1528 DECLARE_GETSETOOP(Double, D), |
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1529 |
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1530 DECLARE_GETSETNATIVE(Byte, B), |
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1531 DECLARE_GETSETNATIVE(Short, S), |
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1532 DECLARE_GETSETNATIVE(Char, C), |
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1533 DECLARE_GETSETNATIVE(Int, I), |
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1534 DECLARE_GETSETNATIVE(Long, J), |
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1535 DECLARE_GETSETNATIVE(Float, F), |
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1536 DECLARE_GETSETNATIVE(Double, D), |
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1537 |
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1538 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, |
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1539 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, |
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1540 |
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1541 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, |
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1542 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, |
|
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1543 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, |
|
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1544 |
|
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1545 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, |
|
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1546 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, |
|
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1547 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, |
|
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1548 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, |
|
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1549 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, |
|
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1550 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, |
|
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1551 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, |
|
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1552 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, |
|
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1553 |
|
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1554 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, |
|
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1555 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
|
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1556 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
|
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1557 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, |
|
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1558 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, |
|
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1559 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, |
|
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1560 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, |
|
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1561 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, |
|
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1562 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, |
|
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1563 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, |
|
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1564 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, |
|
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1565 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, |
|
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1566 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, |
|
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1567 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, |
|
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1568 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} |
|
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1569 }; |
|
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1570 |
|
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1571 // These are the methods for 1.8.0 |
|
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1572 static JNINativeMethod methods_18[] = { |
|
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1573 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, |
|
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1574 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, |
|
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1575 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, |
|
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1576 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, |
| 0 | 1577 |
| 1578 DECLARE_GETSETOOP(Boolean, Z), | |
| 1579 DECLARE_GETSETOOP(Byte, B), | |
| 1580 DECLARE_GETSETOOP(Short, S), | |
| 1581 DECLARE_GETSETOOP(Char, C), | |
| 1582 DECLARE_GETSETOOP(Int, I), | |
| 1583 DECLARE_GETSETOOP(Long, J), | |
| 1584 DECLARE_GETSETOOP(Float, F), | |
| 1585 DECLARE_GETSETOOP(Double, D), | |
| 1586 | |
| 1587 DECLARE_GETSETNATIVE(Byte, B), | |
| 1588 DECLARE_GETSETNATIVE(Short, S), | |
| 1589 DECLARE_GETSETNATIVE(Char, C), | |
| 1590 DECLARE_GETSETNATIVE(Int, I), | |
| 1591 DECLARE_GETSETNATIVE(Long, J), | |
| 1592 DECLARE_GETSETNATIVE(Float, F), | |
| 1593 DECLARE_GETSETNATIVE(Double, D), | |
| 1594 | |
| 1595 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, | |
| 1596 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, | |
| 1597 | |
| 1598 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, | |
| 1599 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, | |
| 1600 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, | |
| 1601 | |
| 1602 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, | |
| 1603 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, | |
| 1604 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, | |
| 1605 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, | |
| 1606 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, | |
| 1607 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, | |
| 1608 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, | |
| 1609 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, | |
| 1610 | |
|
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1611 {CC"defineClass", CC"("DC_Args")"CLS, FN_PTR(Unsafe_DefineClass)}, |
| 0 | 1612 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
| 1613 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, | |
| 1614 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, | |
| 1615 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, | |
| 1616 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, | |
| 1617 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, | |
| 1618 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, | |
| 1619 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, | |
| 1620 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, | |
| 1621 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, | |
| 1622 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, | |
| 1623 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, | |
| 1624 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} | |
| 1625 }; | |
| 1626 | |
| 1627 JNINativeMethod loadavg_method[] = { | |
|
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1628 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} |
| 0 | 1629 }; |
| 1630 | |
| 1631 JNINativeMethod prefetch_methods[] = { | |
| 1632 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
| 1633 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, | |
| 1634 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, | |
| 1635 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} | |
| 1636 }; | |
| 1637 | |
|
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1638 JNINativeMethod memcopy_methods_17[] = { |
| 0 | 1639 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, |
| 1640 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} | |
| 1641 }; | |
| 1642 | |
| 1643 JNINativeMethod memcopy_methods_15[] = { | |
| 1644 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, | |
| 1645 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} | |
| 1646 }; | |
| 1647 | |
|
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1648 JNINativeMethod anonk_methods[] = { |
|
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1649 {CC"defineAnonymousClass", CC"("DAC_Args")"CLS, FN_PTR(Unsafe_DefineAnonymousClass)}, |
|
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1650 }; |
| 0 | 1651 |
|
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1652 JNINativeMethod lform_methods[] = { |
|
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1653 {CC"shouldBeInitialized",CC"("CLS")Z", FN_PTR(Unsafe_ShouldBeInitialized)}, |
|
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1654 }; |
|
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1655 |
|
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|
1656 JNINativeMethod fence_methods[] = { |
|
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|
1657 {CC"loadFence", CC"()V", FN_PTR(Unsafe_LoadFence)}, |
|
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1658 {CC"storeFence", CC"()V", FN_PTR(Unsafe_StoreFence)}, |
|
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1659 {CC"fullFence", CC"()V", FN_PTR(Unsafe_FullFence)}, |
|
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1660 }; |
|
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|
1661 |
| 0 | 1662 #undef CC |
| 1663 #undef FN_PTR | |
| 1664 | |
| 1665 #undef ADR | |
| 1666 #undef LANG | |
| 1667 #undef OBJ | |
| 1668 #undef CLS | |
| 1669 #undef CTR | |
| 1670 #undef FLD | |
| 1671 #undef MTH | |
| 1672 #undef THR | |
| 1673 #undef DC0_Args | |
|
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1674 #undef DC_Args |
| 0 | 1675 |
| 1676 #undef DECLARE_GETSETOOP | |
| 1677 #undef DECLARE_GETSETNATIVE | |
| 1678 | |
| 1679 | |
|
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|
1680 /** |
|
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1681 * Helper method to register native methods. |
|
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1682 */ |
|
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1683 static bool register_natives(const char* message, JNIEnv* env, jclass clazz, const JNINativeMethod* methods, jint nMethods) { |
|
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1684 int status = env->RegisterNatives(clazz, methods, nMethods); |
|
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1685 if (status < 0 || env->ExceptionOccurred()) { |
|
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1686 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
|
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1687 tty->print_cr("Unsafe: failed registering %s", message); |
|
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1688 } |
|
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|
1689 env->ExceptionClear(); |
|
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|
1690 return false; |
|
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1691 } else { |
|
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1692 if (PrintMiscellaneous && (Verbose || WizardMode)) { |
|
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1693 tty->print_cr("Unsafe: successfully registered %s", message); |
|
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1694 } |
|
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1695 return true; |
|
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|
1696 } |
|
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|
1697 } |
|
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|
1698 |
|
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1699 |
| 0 | 1700 // This one function is exported, used by NativeLookup. |
| 1701 // The Unsafe_xxx functions above are called only from the interpreter. | |
| 1702 // The optimizer looks at names and signatures to recognize | |
| 1703 // individual functions. | |
| 1704 | |
| 1705 JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) | |
| 1706 UnsafeWrapper("JVM_RegisterUnsafeMethods"); | |
| 1707 { | |
| 1708 ThreadToNativeFromVM ttnfv(thread); | |
|
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1709 |
|
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1710 // Unsafe methods |
| 0 | 1711 { |
|
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1712 bool success = false; |
|
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1713 // 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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1714 if (!success) { |
|
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1715 success = register_natives("1.6 methods", env, unsafecls, methods_16, sizeof(methods_16)/sizeof(JNINativeMethod)); |
|
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1716 } |
|
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1717 if (!success) { |
|
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1718 success = register_natives("1.8 methods", env, unsafecls, methods_18, sizeof(methods_18)/sizeof(JNINativeMethod)); |
|
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1719 } |
|
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1720 if (!success) { |
|
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1721 success = register_natives("1.5 methods", env, unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); |
|
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1722 } |
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1723 if (!success) { |
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1724 success = register_natives("1.4.1 methods", env, unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); |
| 0 | 1725 } |
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1726 if (!success) { |
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1727 success = register_natives("1.4.0 methods", env, unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); |
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1728 } |
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1729 guarantee(success, "register unsafe natives"); |
| 0 | 1730 } |
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1731 |
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1732 // Unsafe.getLoadAverage |
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1733 register_natives("1.6 loadavg method", env, unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); |
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1734 |
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1735 // Prefetch methods |
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1736 register_natives("1.6 prefetch methods", env, unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); |
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1737 |
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1738 // Memory copy methods |
| 0 | 1739 { |
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1740 bool success = false; |
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1741 if (!success) { |
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1742 success = register_natives("1.7 memory copy methods", env, unsafecls, memcopy_methods_17, sizeof(memcopy_methods_17)/sizeof(JNINativeMethod)); |
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1743 } |
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1744 if (!success) { |
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1745 success = register_natives("1.5 memory copy methods", env, unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); |
| 0 | 1746 } |
| 1747 } | |
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1748 |
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1749 // Unsafe.defineAnonymousClass |
|
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1750 if (EnableInvokeDynamic) { |
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1751 register_natives("1.7 define anonymous class method", env, unsafecls, anonk_methods, sizeof(anonk_methods)/sizeof(JNINativeMethod)); |
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1752 } |
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1753 |
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1754 // Unsafe.shouldBeInitialized |
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1755 if (EnableInvokeDynamic) { |
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1756 register_natives("1.7 LambdaForm support", env, unsafecls, lform_methods, sizeof(lform_methods)/sizeof(JNINativeMethod)); |
| 0 | 1757 } |
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1758 |
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1759 // Fence methods |
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1760 register_natives("1.8 fence methods", env, unsafecls, fence_methods, sizeof(fence_methods)/sizeof(JNINativeMethod)); |
| 0 | 1761 } |
| 1762 JVM_END |