unsafe.cpp revision 113:ba764ed4b6f2
1201342Snyan/* 2201342Snyan * Copyright 2000-2007 Sun Microsystems, Inc. All Rights Reserved. 3201342Snyan * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4201342Snyan * 5201342Snyan * This code is free software; you can redistribute it and/or modify it 6201342Snyan * under the terms of the GNU General Public License version 2 only, as 7201342Snyan * published by the Free Software Foundation. 8201342Snyan * 9201342Snyan * This code is distributed in the hope that it will be useful, but WITHOUT 10201342Snyan * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11201342Snyan * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12201342Snyan * version 2 for more details (a copy is included in the LICENSE file that 13201342Snyan * accompanied this code). 14201342Snyan * 15201342Snyan * You should have received a copy of the GNU General Public License version 16201342Snyan * 2 along with this work; if not, write to the Free Software Foundation, 17201342Snyan * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18201342Snyan * 19201342Snyan * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20201342Snyan * CA 95054 USA or visit www.sun.com if you need additional information or 21201342Snyan * have any questions. 22201342Snyan * 23201342Snyan */ 24201342Snyan 25201342Snyan/* 26201342Snyan * Implementation of class sun.misc.Unsafe 27201342Snyan */ 28201342Snyan 29201342Snyan#include "incls/_precompiled.incl" 30201342Snyan#include "incls/_unsafe.cpp.incl" 31201342Snyan 32201342Snyan#define MAX_OBJECT_SIZE \ 33201342Snyan ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ 34201342Snyan + ((julong)max_jint * sizeof(double)) ) 35201342Snyan 36201342Snyan 37201342Snyan#define UNSAFE_ENTRY(result_type, header) \ 38201342Snyan JVM_ENTRY(result_type, header) 39201342Snyan 40201342Snyan// Can't use UNSAFE_LEAF because it has the signature of a straight 41201342Snyan// call into the runtime (just like JVM_LEAF, funny that) but it's 42201342Snyan// called like a Java Native and thus the wrapper built for it passes 43201342Snyan// arguments like a JNI call. It expects those arguments to be popped 44201342Snyan// from the stack on Intel like all good JNI args are, and adjusts the 45201342Snyan// stack according. Since the JVM_LEAF call expects no extra 46201342Snyan// arguments the stack isn't popped in the C code, is pushed by the 47201342Snyan// wrapper and we get sick. 48201342Snyan//#define UNSAFE_LEAF(result_type, header) \ 49201342Snyan// JVM_LEAF(result_type, header) 50201342Snyan 51201342Snyan#define UNSAFE_END JVM_END 52201342Snyan 53201342Snyan#define UnsafeWrapper(arg) /*nothing, for the present*/ 54201342Snyan 55201342Snyan 56201342Snyaninline void* addr_from_java(jlong addr) { 57201342Snyan // This assert fails in a variety of ways on 32-bit systems. 58201342Snyan // It is impossible to predict whether native code that converts 59201342Snyan // pointers to longs will sign-extend or zero-extend the addresses. 60201342Snyan //assert(addr == (uintptr_t)addr, "must not be odd high bits"); 61201342Snyan return (void*)(uintptr_t)addr; 62201342Snyan} 63201342Snyan 64201342Snyaninline jlong addr_to_java(void* p) { 65201342Snyan assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); 66201342Snyan return (uintptr_t)p; 67201342Snyan} 68201342Snyan 69201342Snyan 70201342Snyan// Note: The VM's obj_field and related accessors use byte-scaled 71201342Snyan// ("unscaled") offsets, just as the unsafe methods do. 72201342Snyan 73201342Snyan// However, the method Unsafe.fieldOffset explicitly declines to 74201342Snyan// guarantee this. The field offset values manipulated by the Java user 75201342Snyan// through the Unsafe API are opaque cookies that just happen to be byte 76201342Snyan// offsets. We represent this state of affairs by passing the cookies 77201342Snyan// through conversion functions when going between the VM and the Unsafe API. 78201342Snyan// The conversion functions just happen to be no-ops at present. 79226506Sdes 80226506Sdesinline jlong field_offset_to_byte_offset(jlong field_offset) { 81201342Snyan return field_offset; 82201342Snyan} 83201342Snyan 84201342Snyaninline jlong field_offset_from_byte_offset(jlong byte_offset) { 85201342Snyan return byte_offset; 86201342Snyan} 87201342Snyan 88201342Snyaninline jint invocation_key_from_method_slot(jint slot) { 89201342Snyan return slot; 90201342Snyan} 91201342Snyan 92201342Snyaninline jint invocation_key_to_method_slot(jint key) { 93201342Snyan return key; 94201342Snyan} 95201342Snyan 96201342Snyaninline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { 97201342Snyan jlong byte_offset = field_offset_to_byte_offset(field_offset); 98201342Snyan#ifdef ASSERT 99201342Snyan if (p != NULL) { 100201342Snyan assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); 101201342Snyan if (byte_offset == (jint)byte_offset) { 102201342Snyan void* ptr_plus_disp = (address)p + byte_offset; 103201342Snyan assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, 104201342Snyan "raw [ptr+disp] must be consistent with oop::field_base"); 105201342Snyan } 106201342Snyan } 107201342Snyan#endif 108201342Snyan if (sizeof(char*) == sizeof(jint)) // (this constant folds!) 109201342Snyan return (address)p + (jint) byte_offset; 110201342Snyan else 111201342Snyan return (address)p + byte_offset; 112201342Snyan} 113201342Snyan 114201342Snyan// Externally callable versions: 115201342Snyan// (Use these in compiler intrinsics which emulate unsafe primitives.) 116201342Snyanjlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { 117201342Snyan return field_offset; 118201342Snyan} 119201342Snyanjlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { 120201342Snyan return byte_offset; 121201342Snyan} 122201342Snyanjint Unsafe_invocation_key_from_method_slot(jint slot) { 123201342Snyan return invocation_key_from_method_slot(slot); 124201342Snyan} 125201342Snyanjint Unsafe_invocation_key_to_method_slot(jint key) { 126201342Snyan return invocation_key_to_method_slot(key); 127201342Snyan} 128201342Snyan 129239063Snyan 130239063Snyan///// Data in the Java heap. 131201342Snyan 132201342Snyan#define GET_FIELD(obj, offset, type_name, v) \ 133232784Snyan oop p = JNIHandles::resolve(obj); \ 134239063Snyan type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) 135239063Snyan 136201342Snyan#define SET_FIELD(obj, offset, type_name, x) \ 137201342Snyan oop p = JNIHandles::resolve(obj); \ 138219960Snyan *(type_name*)index_oop_from_field_offset_long(p, offset) = x 139201342Snyan 140201342Snyan#define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ 141201342Snyan oop p = JNIHandles::resolve(obj); \ 142201342Snyan volatile type_name v = *(volatile type_name*)index_oop_from_field_offset_long(p, offset) 143201342Snyan 144201342Snyan#define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ 145201342Snyan oop p = JNIHandles::resolve(obj); \ 146201342Snyan *(volatile type_name*)index_oop_from_field_offset_long(p, offset) = x; \ 147201342Snyan OrderAccess::fence(); 148201342Snyan 149201342Snyan// Macros for oops that check UseCompressedOops 150220685Snyan 151201342Snyan#define GET_OOP_FIELD(obj, offset, v) \ 152201342Snyan oop p = JNIHandles::resolve(obj); \ 153201342Snyan oop v; \ 154201342Snyan if (UseCompressedOops) { \ 155201342Snyan narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ 156201342Snyan v = oopDesc::decode_heap_oop(n); \ 157201342Snyan } else { \ 158201342Snyan v = *(oop*)index_oop_from_field_offset_long(p, offset); \ 159201342Snyan } 160201342Snyan 161201342Snyan#define GET_OOP_FIELD_VOLATILE(obj, offset, v) \ 162201342Snyan oop p = JNIHandles::resolve(obj); \ 163201342Snyan volatile oop v; \ 164201342Snyan if (UseCompressedOops) { \ 165201342Snyan volatile narrowOop n = *(volatile narrowOop*)index_oop_from_field_offset_long(p, offset); \ 166201342Snyan v = oopDesc::decode_heap_oop(n); \ 167201342Snyan } else { \ 168201342Snyan v = *(volatile oop*)index_oop_from_field_offset_long(p, offset); \ 169201342Snyan } 170201342Snyan 171201342Snyan 172201342Snyan// Get/SetObject must be special-cased, since it works with handles. 173201342Snyan 174235988Sgleb// The xxx140 variants for backward compatibility do not allow a full-width offset. 175201342SnyanUNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) 176201342Snyan UnsafeWrapper("Unsafe_GetObject"); 177201342Snyan if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); 178201342Snyan GET_OOP_FIELD(obj, offset, v) 179201342Snyan return JNIHandles::make_local(env, v); 180201342SnyanUNSAFE_END 181201342Snyan 182201342SnyanUNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) 183201342Snyan UnsafeWrapper("Unsafe_SetObject"); 184201342Snyan if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); 185201342Snyan oop x = JNIHandles::resolve(x_h); 186201342Snyan //SET_FIELD(obj, offset, oop, x); 187201342Snyan oop p = JNIHandles::resolve(obj); 188201342Snyan if (UseCompressedOops) { 189201342Snyan if (x != NULL) { 190201342Snyan // If there is a heap base pointer, we are obliged to emit a store barrier. 191201342Snyan oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); 192201342Snyan } else { 193201342Snyan narrowOop n = oopDesc::encode_heap_oop_not_null(x); 194201342Snyan *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; 195201342Snyan } 196201342Snyan } else { 197201342Snyan if (x != NULL) { 198201342Snyan // If there is a heap base pointer, we are obliged to emit a store barrier. 199201342Snyan oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); 200201342Snyan } else { 201201342Snyan *(oop*)index_oop_from_field_offset_long(p, offset) = x; 202201342Snyan } 203201342Snyan } 204201342SnyanUNSAFE_END 205201342Snyan 206201342Snyan// The normal variants allow a null base pointer with an arbitrary address. 207201342Snyan// But if the base pointer is non-null, the offset should make some sense. 208201342Snyan// That is, it should be in the range [0, MAX_OBJECT_SIZE]. 209201342SnyanUNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) 210201342Snyan UnsafeWrapper("Unsafe_GetObject"); 211201342Snyan GET_OOP_FIELD(obj, offset, v) 212201342Snyan return JNIHandles::make_local(env, v); 213201342SnyanUNSAFE_END 214201342Snyan 215201342SnyanUNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) 216201342Snyan UnsafeWrapper("Unsafe_SetObject"); 217201342Snyan oop x = JNIHandles::resolve(x_h); 218201342Snyan oop p = JNIHandles::resolve(obj); 219201342Snyan if (UseCompressedOops) { 220201342Snyan oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); 221201342Snyan } else { 222201342Snyan oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); 223201342Snyan } 224201342SnyanUNSAFE_END 225201342Snyan 226201342SnyanUNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) 227201342Snyan UnsafeWrapper("Unsafe_GetObjectVolatile"); 228201342Snyan GET_OOP_FIELD_VOLATILE(obj, offset, v) 229201342Snyan return JNIHandles::make_local(env, v); 230201342SnyanUNSAFE_END 231201342Snyan 232201342SnyanUNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) 233201342Snyan UnsafeWrapper("Unsafe_SetObjectVolatile"); 234201342Snyan oop x = JNIHandles::resolve(x_h); 235201342Snyan oop p = JNIHandles::resolve(obj); 236201342Snyan if (UseCompressedOops) { 237201342Snyan oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); 238201342Snyan } else { 239201342Snyan oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); 240201342Snyan } 241201342Snyan OrderAccess::fence(); 242201342SnyanUNSAFE_END 243201342Snyan 244201342Snyan// Volatile long versions must use locks if !VM_Version::supports_cx8(). 245201342Snyan// support_cx8 is a surrogate for 'supports atomic long memory ops'. 246201342Snyan 247201342SnyanUNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) 248201342Snyan UnsafeWrapper("Unsafe_GetLongVolatile"); 249201342Snyan { 250201342Snyan if (VM_Version::supports_cx8()) { 251201342Snyan GET_FIELD_VOLATILE(obj, offset, jlong, v); 252201342Snyan return v; 253201342Snyan } 254201342Snyan else { 255201342Snyan Handle p (THREAD, JNIHandles::resolve(obj)); 256201342Snyan jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); 257201342Snyan ObjectLocker ol(p, THREAD); 258201342Snyan jlong value = *addr; 259201342Snyan return value; 260201342Snyan } 261201342Snyan } 262201342SnyanUNSAFE_END 263201342Snyan 264201342SnyanUNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) 265201342Snyan UnsafeWrapper("Unsafe_SetLongVolatile"); 266201342Snyan { 267201342Snyan if (VM_Version::supports_cx8()) { 268201342Snyan SET_FIELD_VOLATILE(obj, offset, jlong, x); 269201342Snyan } 270201342Snyan else { 271201342Snyan Handle p (THREAD, JNIHandles::resolve(obj)); 272201342Snyan jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); 273201342Snyan ObjectLocker ol(p, THREAD); 274201342Snyan *addr = x; 275201342Snyan } 276201342Snyan } 277201342SnyanUNSAFE_END 278201342Snyan 279201342Snyan 280201342Snyan#define DEFINE_GETSETOOP(jboolean, Boolean) \ 281201342Snyan \ 282201342SnyanUNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ 283201342Snyan UnsafeWrapper("Unsafe_Get"#Boolean); \ 284201342Snyan if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ 285201342Snyan GET_FIELD(obj, offset, jboolean, v); \ 286201342Snyan return v; \ 287201342SnyanUNSAFE_END \ 288201342Snyan \ 289201342SnyanUNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ 290201342Snyan UnsafeWrapper("Unsafe_Set"#Boolean); \ 291201342Snyan if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ 292201342Snyan SET_FIELD(obj, offset, jboolean, x); \ 293201342SnyanUNSAFE_END \ 294201342Snyan \ 295201342SnyanUNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ 296201342Snyan UnsafeWrapper("Unsafe_Get"#Boolean); \ 297201342Snyan GET_FIELD(obj, offset, jboolean, v); \ 298201342Snyan return v; \ 299201342SnyanUNSAFE_END \ 300201342Snyan \ 301201342SnyanUNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ 302201342Snyan UnsafeWrapper("Unsafe_Set"#Boolean); \ 303201342Snyan SET_FIELD(obj, offset, jboolean, x); \ 304201342SnyanUNSAFE_END \ 305201342Snyan \ 306201342Snyan// END DEFINE_GETSETOOP. 307201342Snyan 308201342Snyan 309201342Snyan#define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ 310201342Snyan \ 311201342SnyanUNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ 312201342Snyan UnsafeWrapper("Unsafe_Get"#Boolean); \ 313201342Snyan GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ 314201342Snyan return v; \ 315201342SnyanUNSAFE_END \ 316201342Snyan \ 317201342SnyanUNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ 318201342Snyan UnsafeWrapper("Unsafe_Set"#Boolean); \ 319201342Snyan SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ 320201342SnyanUNSAFE_END \ 321201342Snyan \ 322201342Snyan// END DEFINE_GETSETOOP_VOLATILE. 323201342Snyan 324201342SnyanDEFINE_GETSETOOP(jboolean, Boolean) 325201342SnyanDEFINE_GETSETOOP(jbyte, Byte) 326201342SnyanDEFINE_GETSETOOP(jshort, Short); 327201342SnyanDEFINE_GETSETOOP(jchar, Char); 328201342SnyanDEFINE_GETSETOOP(jint, Int); 329201342SnyanDEFINE_GETSETOOP(jlong, Long); 330201342SnyanDEFINE_GETSETOOP(jfloat, Float); 331201342SnyanDEFINE_GETSETOOP(jdouble, Double); 332201342Snyan 333254015SmarcelDEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) 334201342SnyanDEFINE_GETSETOOP_VOLATILE(jbyte, Byte) 335254015SmarcelDEFINE_GETSETOOP_VOLATILE(jshort, Short); 336254015SmarcelDEFINE_GETSETOOP_VOLATILE(jchar, Char); 337201342SnyanDEFINE_GETSETOOP_VOLATILE(jint, Int); 338201342Snyan// no long -- handled specially 339201342SnyanDEFINE_GETSETOOP_VOLATILE(jfloat, Float); 340201342SnyanDEFINE_GETSETOOP_VOLATILE(jdouble, Double); 341201342Snyan 342201342Snyan#undef DEFINE_GETSETOOP 343201342Snyan 344201342Snyan// The non-intrinsified versions of setOrdered just use setVolatile 345201342Snyan 346201342SnyanUNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) \ 347201342Snyan UnsafeWrapper("Unsafe_SetOrderedInt"); \ 348201342Snyan SET_FIELD_VOLATILE(obj, offset, jint, x); \ 349201342SnyanUNSAFE_END 350201342Snyan 351201342SnyanUNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) 352218737Snyan UnsafeWrapper("Unsafe_SetOrderedObject"); 353235988Sgleb oop x = JNIHandles::resolve(x_h); 354232784Snyan oop p = JNIHandles::resolve(obj); 355201342Snyan if (UseCompressedOops) { 356201342Snyan oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); 357201342Snyan } else { 358201342Snyan oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); 359201342Snyan } 360201342Snyan OrderAccess::fence(); 361201342SnyanUNSAFE_END 362201342Snyan 363201342SnyanUNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) 364201342Snyan UnsafeWrapper("Unsafe_SetOrderedLong"); 365201342Snyan { 366201342Snyan if (VM_Version::supports_cx8()) { 367201342Snyan SET_FIELD_VOLATILE(obj, offset, jlong, x); 368201342Snyan } 369201342Snyan else { 370201342Snyan Handle p (THREAD, JNIHandles::resolve(obj)); 371201342Snyan jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); 372201342Snyan ObjectLocker ol(p, THREAD); 373201342Snyan *addr = x; 374201342Snyan } 375201342Snyan } 376201342SnyanUNSAFE_END 377201342Snyan 378201342Snyan////// Data in the C heap. 379201342Snyan 380226506Sdes// Note: These do not throw NullPointerException for bad pointers. 381232784Snyan// They just crash. Only a oop base pointer can generate a NullPointerException. 382232784Snyan// 383232784Snyan#define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ 384232784Snyan \ 385201342SnyanUNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ 386201342Snyan UnsafeWrapper("Unsafe_GetNative"#Type); \ 387201342Snyan void* p = addr_from_java(addr); \ 388201342Snyan JavaThread* t = JavaThread::current(); \ 389201342Snyan t->set_doing_unsafe_access(true); \ 390201342Snyan java_type x = *(volatile native_type*)p; \ 391201342Snyan t->set_doing_unsafe_access(false); \ 392201342Snyan return x; \ 393201342SnyanUNSAFE_END \ 394201342Snyan \ 395201342SnyanUNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ 396201342Snyan UnsafeWrapper("Unsafe_SetNative"#Type); \ 397201342Snyan JavaThread* t = JavaThread::current(); \ 398201342Snyan t->set_doing_unsafe_access(true); \ 399201342Snyan void* p = addr_from_java(addr); \ 400201342Snyan *(volatile native_type*)p = x; \ 401232784Snyan t->set_doing_unsafe_access(false); \ 402219225SnyanUNSAFE_END \ 403232784Snyan \ 404201342Snyan// END DEFINE_GETSETNATIVE. 405219225Snyan 406201342SnyanDEFINE_GETSETNATIVE(jbyte, Byte, signed char) 407201342SnyanDEFINE_GETSETNATIVE(jshort, Short, signed short); 408201342SnyanDEFINE_GETSETNATIVE(jchar, Char, unsigned short); 409201342SnyanDEFINE_GETSETNATIVE(jint, Int, jint); 410201342Snyan// no long -- handled specially 411201342SnyanDEFINE_GETSETNATIVE(jfloat, Float, float); 412201342SnyanDEFINE_GETSETNATIVE(jdouble, Double, double); 413201342Snyan 414201342Snyan#undef DEFINE_GETSETNATIVE 415201342Snyan 416201342SnyanUNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) 417201342Snyan UnsafeWrapper("Unsafe_GetNativeLong"); 418201342Snyan JavaThread* t = JavaThread::current(); 419201342Snyan // We do it this way to avoid problems with access to heap using 64 420219225Snyan // bit loads, as jlong in heap could be not 64-bit aligned, and on 421201342Snyan // some CPUs (SPARC) it leads to SIGBUS. 422201342Snyan t->set_doing_unsafe_access(true); 423201342Snyan void* p = addr_from_java(addr); 424201342Snyan jlong x; 425201342Snyan if (((intptr_t)p & 7) == 0) { 426201342Snyan // jlong is aligned, do a volatile access 427201342Snyan x = *(volatile jlong*)p; 428201342Snyan } else { 429201342Snyan jlong_accessor acc; 430201342Snyan acc.words[0] = ((volatile jint*)p)[0]; 431201342Snyan acc.words[1] = ((volatile jint*)p)[1]; 432201342Snyan x = acc.long_value; 433201342Snyan } 434201342Snyan t->set_doing_unsafe_access(false); 435201342Snyan return x; 436201342SnyanUNSAFE_END 437201342Snyan 438201342SnyanUNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) 439201342Snyan UnsafeWrapper("Unsafe_SetNativeLong"); 440201342Snyan JavaThread* t = JavaThread::current(); 441201342Snyan // see comment for Unsafe_GetNativeLong 442201342Snyan t->set_doing_unsafe_access(true); 443201342Snyan void* p = addr_from_java(addr); 444201342Snyan if (((intptr_t)p & 7) == 0) { 445201342Snyan // jlong is aligned, do a volatile access 446201342Snyan *(volatile jlong*)p = x; 447201342Snyan } else { 448235988Sgleb jlong_accessor acc; 449219960Snyan acc.long_value = x; 450218737Snyan ((volatile jint*)p)[0] = acc.words[0]; 451201342Snyan ((volatile jint*)p)[1] = acc.words[1]; 452201342Snyan } 453201342Snyan t->set_doing_unsafe_access(false); 454201342SnyanUNSAFE_END 455201342Snyan 456201342Snyan 457201342SnyanUNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) 458201342Snyan UnsafeWrapper("Unsafe_GetNativeAddress"); 459219960Snyan void* p = addr_from_java(addr); 460219960Snyan return addr_to_java(*(void**)p); 461201342SnyanUNSAFE_END 462201342Snyan 463201342SnyanUNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) 464201342Snyan UnsafeWrapper("Unsafe_SetNativeAddress"); 465201342Snyan void* p = addr_from_java(addr); 466201342Snyan *(void**)p = addr_from_java(x); 467201342SnyanUNSAFE_END 468201342Snyan 469219960Snyan 470201342Snyan////// Allocation requests 471201342Snyan 472201342SnyanUNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) 473201342Snyan UnsafeWrapper("Unsafe_AllocateInstance"); 474201342Snyan { 475201342Snyan ThreadToNativeFromVM ttnfv(thread); 476201342Snyan return env->AllocObject(cls); 477201342Snyan } 478201342SnyanUNSAFE_END 479201342Snyan 480201342SnyanUNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) 481201342Snyan UnsafeWrapper("Unsafe_AllocateMemory"); 482201342Snyan size_t sz = (size_t)size; 483201342Snyan if (sz != (julong)size || size < 0) { 484201342Snyan THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 485201342Snyan } 486201342Snyan if (sz == 0) { 487201342Snyan return 0; 488201342Snyan } 489201342Snyan sz = round_to(sz, HeapWordSize); 490201342Snyan void* x = os::malloc(sz); 491214257Snyan if (x == NULL) { 492201342Snyan THROW_0(vmSymbols::java_lang_OutOfMemoryError()); 493201342Snyan } 494201342Snyan //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); 495201342Snyan return addr_to_java(x); 496201342SnyanUNSAFE_END 497201342Snyan 498201342SnyanUNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) 499201342Snyan UnsafeWrapper("Unsafe_ReallocateMemory"); 500218842Snyan void* p = addr_from_java(addr); 501219960Snyan size_t sz = (size_t)size; 502219960Snyan if (sz != (julong)size || size < 0) { 503219960Snyan THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 504201342Snyan } 505219960Snyan if (sz == 0) { 506201342Snyan os::free(p); 507201342Snyan return 0; 508201342Snyan } 509201342Snyan sz = round_to(sz, HeapWordSize); 510201342Snyan void* x = (p == NULL) ? os::malloc(sz) : os::realloc(p, sz); 511201342Snyan if (x == NULL) { 512201342Snyan THROW_0(vmSymbols::java_lang_OutOfMemoryError()); 513201342Snyan } 514201342Snyan return addr_to_java(x); 515201342SnyanUNSAFE_END 516201342Snyan 517201342SnyanUNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) 518201342Snyan UnsafeWrapper("Unsafe_FreeMemory"); 519201342Snyan void* p = addr_from_java(addr); 520201342Snyan if (p == NULL) { 521201342Snyan return; 522201342Snyan } 523201342Snyan os::free(p); 524201342SnyanUNSAFE_END 525201342Snyan 526201342SnyanUNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) 527201342Snyan UnsafeWrapper("Unsafe_SetMemory"); 528201342Snyan size_t sz = (size_t)size; 529201342Snyan if (sz != (julong)size || size < 0) { 530201342Snyan THROW(vmSymbols::java_lang_IllegalArgumentException()); 531201342Snyan } 532201342Snyan char* p = (char*) addr_from_java(addr); 533201342Snyan Copy::fill_to_memory_atomic(p, sz, value); 534201342SnyanUNSAFE_END 535201342Snyan 536201342SnyanUNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) 537201342Snyan UnsafeWrapper("Unsafe_SetMemory"); 538201342Snyan size_t sz = (size_t)size; 539201342Snyan if (sz != (julong)size || size < 0) { 540201342Snyan THROW(vmSymbols::java_lang_IllegalArgumentException()); 541201342Snyan } 542201342Snyan oop base = JNIHandles::resolve(obj); 543201342Snyan void* p = index_oop_from_field_offset_long(base, offset); 544201342Snyan Copy::fill_to_memory_atomic(p, sz, value); 545201342SnyanUNSAFE_END 546201342Snyan 547201342SnyanUNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) 548201342Snyan UnsafeWrapper("Unsafe_CopyMemory"); 549201342Snyan if (size == 0) { 550201342Snyan return; 551201342Snyan } 552201342Snyan size_t sz = (size_t)size; 553201342Snyan if (sz != (julong)size || size < 0) { 554201342Snyan THROW(vmSymbols::java_lang_IllegalArgumentException()); 555201342Snyan } 556201342Snyan void* src = addr_from_java(srcAddr); 557242863Snyan void* dst = addr_from_java(dstAddr); 558242863Snyan Copy::conjoint_memory_atomic(src, dst, sz); 559242863SnyanUNSAFE_END 560242863Snyan 561201342SnyanUNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) 562201342Snyan UnsafeWrapper("Unsafe_CopyMemory"); 563201342Snyan if (size == 0) { 564201342Snyan return; 565201342Snyan } 566201342Snyan size_t sz = (size_t)size; 567201342Snyan if (sz != (julong)size || size < 0) { 568201342Snyan THROW(vmSymbols::java_lang_IllegalArgumentException()); 569201342Snyan } 570201342Snyan oop srcp = JNIHandles::resolve(srcObj); 571201342Snyan oop dstp = JNIHandles::resolve(dstObj); 572201342Snyan if (dstp != NULL && !dstp->is_typeArray()) { 573201342Snyan // NYI: This works only for non-oop arrays at present. 574201342Snyan // Generalizing it would be reasonable, but requires card marking. 575201342Snyan // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. 576201342Snyan THROW(vmSymbols::java_lang_IllegalArgumentException()); 577201342Snyan } 578201342Snyan void* src = index_oop_from_field_offset_long(srcp, srcOffset); 579201342Snyan void* dst = index_oop_from_field_offset_long(dstp, dstOffset); 580201342Snyan Copy::conjoint_memory_atomic(src, dst, sz); 581201342SnyanUNSAFE_END 582201342Snyan 583201342Snyan 584201342Snyan////// Random queries 585201342Snyan 586254015Smarcel// See comment at file start about UNSAFE_LEAF 587201342Snyan//UNSAFE_LEAF(jint, Unsafe_AddressSize()) 588201342SnyanUNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) 589201342Snyan UnsafeWrapper("Unsafe_AddressSize"); 590201342Snyan return sizeof(void*); 591201342SnyanUNSAFE_END 592201342Snyan 593201342Snyan// See comment at file start about UNSAFE_LEAF 594201342Snyan//UNSAFE_LEAF(jint, Unsafe_PageSize()) 595201342SnyanUNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) 596201342Snyan UnsafeWrapper("Unsafe_PageSize"); 597201342Snyan return os::vm_page_size(); 598201342SnyanUNSAFE_END 599201342Snyan 600201342Snyanjint find_field_offset(jobject field, int must_be_static, TRAPS) { 601201342Snyan if (field == NULL) { 602232784Snyan THROW_0(vmSymbols::java_lang_NullPointerException()); 603232784Snyan } 604232784Snyan 605232784Snyan oop reflected = JNIHandles::resolve_non_null(field); 606232784Snyan oop mirror = java_lang_reflect_Field::clazz(reflected); 607232784Snyan klassOop k = java_lang_Class::as_klassOop(mirror); 608201342Snyan int slot = java_lang_reflect_Field::slot(reflected); 609201342Snyan int modifiers = java_lang_reflect_Field::modifiers(reflected); 610201342Snyan 611201342Snyan if (must_be_static >= 0) { 612201342Snyan int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); 613201342Snyan if (must_be_static != really_is_static) { 614201342Snyan THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 615201342Snyan } 616201342Snyan } 617201342Snyan 618201342Snyan int offset = instanceKlass::cast(k)->offset_from_fields(slot); 619201342Snyan return field_offset_from_byte_offset(offset); 620239063Snyan} 621239063Snyan 622201342SnyanUNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) 623201342Snyan UnsafeWrapper("Unsafe_ObjectFieldOffset"); 624201342Snyan return find_field_offset(field, 0, THREAD); 625201342SnyanUNSAFE_END 626201342Snyan 627201342SnyanUNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) 628201342Snyan UnsafeWrapper("Unsafe_StaticFieldOffset"); 629254015Smarcel return find_field_offset(field, 1, THREAD); 630201342SnyanUNSAFE_END 631254015Smarcel 632201342SnyanUNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) 633201342Snyan UnsafeWrapper("Unsafe_StaticFieldBase"); 634254015Smarcel // Note: In this VM implementation, a field address is always a short 635201342Snyan // offset from the base of a a klass metaobject. Thus, the full dynamic 636201342Snyan // range of the return type is never used. However, some implementations 637201342Snyan // might put the static field inside an array shared by many classes, 638201342Snyan // or even at a fixed address, in which case the address could be quite 639201342Snyan // large. In that last case, this function would return NULL, since 640201342Snyan // the address would operate alone, without any base pointer. 641201342Snyan 642201342Snyan if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); 643201342Snyan 644201342Snyan oop reflected = JNIHandles::resolve_non_null(field); 645201342Snyan oop mirror = java_lang_reflect_Field::clazz(reflected); 646201342Snyan int modifiers = java_lang_reflect_Field::modifiers(reflected); 647201342Snyan 648201342Snyan if ((modifiers & JVM_ACC_STATIC) == 0) { 649201342Snyan THROW_0(vmSymbols::java_lang_IllegalArgumentException()); 650201342Snyan } 651201342Snyan 652201342Snyan return JNIHandles::make_local(env, java_lang_Class::as_klassOop(mirror)); 653201342SnyanUNSAFE_END 654201342Snyan 655201342Snyan//@deprecated 656201342SnyanUNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) 657201342Snyan UnsafeWrapper("Unsafe_FieldOffset"); 658201342Snyan // tries (but fails) to be polymorphic between static and non-static: 659201342Snyan jlong offset = find_field_offset(field, -1, THREAD); 660201342Snyan guarantee(offset == (jint)offset, "offset fits in 32 bits"); 661201342Snyan return (jint)offset; 662201342SnyanUNSAFE_END 663201342Snyan 664201342Snyan//@deprecated 665201342SnyanUNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) 666201342Snyan UnsafeWrapper("Unsafe_StaticFieldBase"); 667201342Snyan if (clazz == NULL) { 668201342Snyan THROW_0(vmSymbols::java_lang_NullPointerException()); 669201342Snyan } 670201342Snyan return JNIHandles::make_local(env, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); 671201342SnyanUNSAFE_END 672201342Snyan 673201342SnyanUNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) 674201342Snyan UnsafeWrapper("Unsafe_EnsureClassInitialized"); 675201342Snyan if (clazz == NULL) { 676201342Snyan THROW(vmSymbols::java_lang_NullPointerException()); 677201342Snyan } 678201342Snyan oop mirror = JNIHandles::resolve_non_null(clazz); 679201342Snyan instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(mirror)); 680219960Snyan if (k != NULL) { 681201342Snyan k->initialize(CHECK); 682201342Snyan } 683201342SnyanUNSAFE_END 684201342Snyan 685201342Snyanstatic void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { 686201342Snyan if (acls == NULL) { 687201342Snyan THROW(vmSymbols::java_lang_NullPointerException()); 688201342Snyan } 689201342Snyan oop mirror = JNIHandles::resolve_non_null(acls); 690201342Snyan klassOop k = java_lang_Class::as_klassOop(mirror); 691201342Snyan if (k == NULL || !k->klass_part()->oop_is_array()) { 692201342Snyan THROW(vmSymbols::java_lang_InvalidClassException()); 693201342Snyan } else if (k->klass_part()->oop_is_objArray()) { 694201342Snyan base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); 695201342Snyan scale = heapOopSize; 696201342Snyan } else if (k->klass_part()->oop_is_typeArray()) { 697201342Snyan typeArrayKlass* tak = typeArrayKlass::cast(k); 698201342Snyan base = tak->array_header_in_bytes(); 699201342Snyan assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); 700201342Snyan scale = (1 << tak->log2_element_size()); 701201342Snyan } else { 702201342Snyan ShouldNotReachHere(); 703201342Snyan } 704201342Snyan} 705201342Snyan 706201342SnyanUNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) 707201342Snyan UnsafeWrapper("Unsafe_ArrayBaseOffset"); 708201342Snyan int base, scale; 709201342Snyan getBaseAndScale(base, scale, acls, CHECK_0); 710201342Snyan return field_offset_from_byte_offset(base); 711201342SnyanUNSAFE_END 712201342Snyan 713201342Snyan 714201342SnyanUNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) 715201342Snyan UnsafeWrapper("Unsafe_ArrayIndexScale"); 716201342Snyan int base, scale; 717201342Snyan getBaseAndScale(base, scale, acls, CHECK_0); 718201342Snyan // This VM packs both fields and array elements down to the byte. 719201342Snyan // But watch out: If this changes, so that array references for 720201342Snyan // a given primitive type (say, T_BOOLEAN) use different memory units 721201342Snyan // than fields, this method MUST return zero for such arrays. 722201342Snyan // For example, the VM used to store sub-word sized fields in full 723201342Snyan // words in the object layout, so that accessors like getByte(Object,int) 724201342Snyan // did not really do what one might expect for arrays. Therefore, 725201342Snyan // this function used to report a zero scale factor, so that the user 726201342Snyan // would know not to attempt to access sub-word array elements. 727201342Snyan // // Code for unpacked fields: 728201342Snyan // if (scale < wordSize) return 0; 729201342Snyan 730201342Snyan // The following allows for a pretty general fieldOffset cookie scheme, 731201342Snyan // but requires it to be linear in byte offset. 732201342Snyan return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); 733201342SnyanUNSAFE_END 734201342Snyan 735201342Snyan 736201342Snyanstatic inline void throw_new(JNIEnv *env, const char *ename) { 737201342Snyan char buf[100]; 738201342Snyan strcpy(buf, "java/lang/"); 739201342Snyan strcat(buf, ename); 740201342Snyan jclass cls = env->FindClass(buf); 741201342Snyan char* msg = NULL; 742201342Snyan env->ThrowNew(cls, msg); 743201342Snyan} 744201342Snyan 745201342Snyanstatic jclass Unsafe_DefineClass(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { 746201342Snyan { 747201342Snyan // Code lifted from JDK 1.3 ClassLoader.c 748201342Snyan 749201342Snyan jbyte *body; 750201342Snyan char *utfName; 751201342Snyan jclass result = 0; 752201342Snyan char buf[128]; 753201342Snyan 754201342Snyan if (UsePerfData) { 755201342Snyan ClassLoader::unsafe_defineClassCallCounter()->inc(); 756201342Snyan } 757201342Snyan 758201342Snyan if (data == NULL) { 759201342Snyan throw_new(env, "NullPointerException"); 760201342Snyan return 0; 761201342Snyan } 762201342Snyan 763201342Snyan /* Work around 4153825. malloc crashes on Solaris when passed a 764201342Snyan * negative size. 765201342Snyan */ 766201342Snyan if (length < 0) { 767201342Snyan throw_new(env, "ArrayIndexOutOfBoundsException"); 768201342Snyan return 0; 769201342Snyan } 770201342Snyan 771201342Snyan body = NEW_C_HEAP_ARRAY(jbyte, length); 772201342Snyan 773201342Snyan if (body == 0) { 774201342Snyan throw_new(env, "OutOfMemoryError"); 775201342Snyan return 0; 776201342Snyan } 777201342Snyan 778201342Snyan env->GetByteArrayRegion(data, offset, length, body); 779201342Snyan 780201342Snyan if (env->ExceptionOccurred()) 781201342Snyan goto free_body; 782201342Snyan 783201342Snyan if (name != NULL) { 784201342Snyan uint len = env->GetStringUTFLength(name); 785201342Snyan int unicode_len = env->GetStringLength(name); 786201342Snyan if (len >= sizeof(buf)) { 787201342Snyan utfName = NEW_C_HEAP_ARRAY(char, len + 1); 788201342Snyan if (utfName == NULL) { 789201342Snyan throw_new(env, "OutOfMemoryError"); 790201342Snyan goto free_body; 791220685Snyan } 792220685Snyan } else { 793220685Snyan utfName = buf; 794220685Snyan } 795220685Snyan env->GetStringUTFRegion(name, 0, unicode_len, utfName); 796220685Snyan //VerifyFixClassname(utfName); 797220685Snyan for (uint i = 0; i < len; i++) { 798220685Snyan if (utfName[i] == '.') utfName[i] = '/'; 799220685Snyan } 800220685Snyan } else { 801220685Snyan utfName = NULL; 802220685Snyan } 803201342Snyan 804201342Snyan result = JVM_DefineClass(env, utfName, loader, body, length, pd); 805201342Snyan 806201342Snyan if (utfName && utfName != buf) 807201342Snyan FREE_C_HEAP_ARRAY(char, utfName); 808201342Snyan 809201342Snyan free_body: 810201342Snyan FREE_C_HEAP_ARRAY(jbyte, body); 811201342Snyan return result; 812201342Snyan } 813201342Snyan} 814201342Snyan 815201342Snyan 816UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) 817 UnsafeWrapper("Unsafe_DefineClass"); 818 { 819 ThreadToNativeFromVM ttnfv(thread); 820 821 int depthFromDefineClass0 = 1; 822 jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); 823 jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller); 824 jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); 825 826 return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); 827 } 828UNSAFE_END 829 830 831UNSAFE_ENTRY(jclass, Unsafe_DefineClass1(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd)) 832 UnsafeWrapper("Unsafe_DefineClass"); 833 { 834 ThreadToNativeFromVM ttnfv(thread); 835 836 return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); 837 } 838UNSAFE_END 839 840 841UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) 842 UnsafeWrapper("Unsafe_MonitorEnter"); 843 { 844 if (jobj == NULL) { 845 THROW(vmSymbols::java_lang_NullPointerException()); 846 } 847 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 848 ObjectSynchronizer::jni_enter(obj, CHECK); 849 } 850UNSAFE_END 851 852 853UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) 854 UnsafeWrapper("Unsafe_TryMonitorEnter"); 855 { 856 if (jobj == NULL) { 857 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); 858 } 859 Handle obj(thread, JNIHandles::resolve_non_null(jobj)); 860 bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); 861 return (res ? JNI_TRUE : JNI_FALSE); 862 } 863UNSAFE_END 864 865 866UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) 867 UnsafeWrapper("Unsafe_MonitorExit"); 868 { 869 if (jobj == NULL) { 870 THROW(vmSymbols::java_lang_NullPointerException()); 871 } 872 Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); 873 ObjectSynchronizer::jni_exit(obj(), CHECK); 874 } 875UNSAFE_END 876 877 878UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) 879 UnsafeWrapper("Unsafe_ThrowException"); 880 { 881 ThreadToNativeFromVM ttnfv(thread); 882 env->Throw(thr); 883 } 884UNSAFE_END 885 886// JSR166 ------------------------------------------------------------------ 887 888UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) 889 UnsafeWrapper("Unsafe_CompareAndSwapObject"); 890 oop x = JNIHandles::resolve(x_h); 891 oop e = JNIHandles::resolve(e_h); 892 oop p = JNIHandles::resolve(obj); 893 HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); 894 oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e); 895 jboolean success = (res == e); 896 if (success) 897 update_barrier_set((void*)addr, x); 898 return success; 899UNSAFE_END 900 901UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) 902 UnsafeWrapper("Unsafe_CompareAndSwapInt"); 903 oop p = JNIHandles::resolve(obj); 904 jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); 905 return (jint)(Atomic::cmpxchg(x, addr, e)) == e; 906UNSAFE_END 907 908UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) 909 UnsafeWrapper("Unsafe_CompareAndSwapLong"); 910 Handle p (THREAD, JNIHandles::resolve(obj)); 911 jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); 912 if (VM_Version::supports_cx8()) 913 return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; 914 else { 915 jboolean success = false; 916 ObjectLocker ol(p, THREAD); 917 if (*addr == e) { *addr = x; success = true; } 918 return success; 919 } 920UNSAFE_END 921 922UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) 923 UnsafeWrapper("Unsafe_Park"); 924 JavaThreadParkedState jtps(thread, time != 0); 925 thread->parker()->park(isAbsolute != 0, time); 926UNSAFE_END 927 928UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) 929 UnsafeWrapper("Unsafe_Unpark"); 930 Parker* p = NULL; 931 if (jthread != NULL) { 932 oop java_thread = JNIHandles::resolve_non_null(jthread); 933 if (java_thread != NULL) { 934 jlong lp = java_lang_Thread::park_event(java_thread); 935 if (lp != 0) { 936 // This cast is OK even though the jlong might have been read 937 // non-atomically on 32bit systems, since there, one word will 938 // always be zero anyway and the value set is always the same 939 p = (Parker*)addr_from_java(lp); 940 } else { 941 // Grab lock if apparently null or using older version of library 942 MutexLocker mu(Threads_lock); 943 java_thread = JNIHandles::resolve_non_null(jthread); 944 if (java_thread != NULL) { 945 JavaThread* thr = java_lang_Thread::thread(java_thread); 946 if (thr != NULL) { 947 p = thr->parker(); 948 if (p != NULL) { // Bind to Java thread for next time. 949 java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); 950 } 951 } 952 } 953 } 954 } 955 } 956 if (p != NULL) { 957 p->unpark(); 958 } 959UNSAFE_END 960 961UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) 962 UnsafeWrapper("Unsafe_Loadavg"); 963 const int max_nelem = 3; 964 double la[max_nelem]; 965 jint ret; 966 967 typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); 968 assert(a->is_typeArray(), "must be type array"); 969 970 if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { 971 ThreadToNativeFromVM ttnfv(thread); 972 throw_new(env, "ArrayIndexOutOfBoundsException"); 973 return -1; 974 } 975 976 ret = os::loadavg(la, nelem); 977 if (ret == -1) return -1; 978 979 // if successful, ret is the number of samples actually retrieved. 980 assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); 981 switch(ret) { 982 case 3: a->double_at_put(2, (jdouble)la[2]); // fall through 983 case 2: a->double_at_put(1, (jdouble)la[1]); // fall through 984 case 1: a->double_at_put(0, (jdouble)la[0]); break; 985 } 986 return ret; 987UNSAFE_END 988 989UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) 990 UnsafeWrapper("Unsafe_PrefetchRead"); 991 oop p = JNIHandles::resolve(obj); 992 void* addr = index_oop_from_field_offset_long(p, 0); 993 Prefetch::read(addr, (intx)offset); 994UNSAFE_END 995 996UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) 997 UnsafeWrapper("Unsafe_PrefetchWrite"); 998 oop p = JNIHandles::resolve(obj); 999 void* addr = index_oop_from_field_offset_long(p, 0); 1000 Prefetch::write(addr, (intx)offset); 1001UNSAFE_END 1002 1003 1004/// JVM_RegisterUnsafeMethods 1005 1006#define ADR "J" 1007 1008#define LANG "Ljava/lang/" 1009 1010#define OBJ LANG"Object;" 1011#define CLS LANG"Class;" 1012#define CTR LANG"reflect/Constructor;" 1013#define FLD LANG"reflect/Field;" 1014#define MTH LANG"reflect/Method;" 1015#define THR LANG"Throwable;" 1016 1017#define DC0_Args LANG"String;[BII" 1018#define DC1_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" 1019 1020#define CC (char*) /*cast a literal from (const char*)*/ 1021#define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) 1022 1023// define deprecated accessors for compabitility with 1.4.0 1024#define DECLARE_GETSETOOP_140(Boolean, Z) \ 1025 {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ 1026 {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} 1027 1028// Note: In 1.4.1, getObject and kin take both int and long offsets. 1029#define DECLARE_GETSETOOP_141(Boolean, Z) \ 1030 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ 1031 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} 1032 1033// Note: In 1.5.0, there are volatile versions too 1034#define DECLARE_GETSETOOP(Boolean, Z) \ 1035 {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ 1036 {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ 1037 {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ 1038 {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} 1039 1040 1041#define DECLARE_GETSETNATIVE(Byte, B) \ 1042 {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ 1043 {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} 1044 1045 1046 1047// %%% These are temporarily supported until the SDK sources 1048// contain the necessarily updated Unsafe.java. 1049static JNINativeMethod methods_140[] = { 1050 1051 {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, 1052 {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, 1053 1054 DECLARE_GETSETOOP_140(Boolean, Z), 1055 DECLARE_GETSETOOP_140(Byte, B), 1056 DECLARE_GETSETOOP_140(Short, S), 1057 DECLARE_GETSETOOP_140(Char, C), 1058 DECLARE_GETSETOOP_140(Int, I), 1059 DECLARE_GETSETOOP_140(Long, J), 1060 DECLARE_GETSETOOP_140(Float, F), 1061 DECLARE_GETSETOOP_140(Double, D), 1062 1063 DECLARE_GETSETNATIVE(Byte, B), 1064 DECLARE_GETSETNATIVE(Short, S), 1065 DECLARE_GETSETNATIVE(Char, C), 1066 DECLARE_GETSETNATIVE(Int, I), 1067 DECLARE_GETSETNATIVE(Long, J), 1068 DECLARE_GETSETNATIVE(Float, F), 1069 DECLARE_GETSETNATIVE(Double, D), 1070 1071 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, 1072 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, 1073 1074 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, 1075 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, 1076// {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, 1077// {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, 1078 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, 1079 1080 {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, //deprecated 1081 {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, //deprecated 1082 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, 1083 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, 1084 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, 1085 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, 1086 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, 1087 1088 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, 1089 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, 1090 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, 1091 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, 1092 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, 1093 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} 1094}; 1095 1096// These are the old methods prior to the JSR 166 changes in 1.5.0 1097static JNINativeMethod methods_141[] = { 1098 1099 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, 1100 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, 1101 1102 DECLARE_GETSETOOP_141(Boolean, Z), 1103 DECLARE_GETSETOOP_141(Byte, B), 1104 DECLARE_GETSETOOP_141(Short, S), 1105 DECLARE_GETSETOOP_141(Char, C), 1106 DECLARE_GETSETOOP_141(Int, I), 1107 DECLARE_GETSETOOP_141(Long, J), 1108 DECLARE_GETSETOOP_141(Float, F), 1109 DECLARE_GETSETOOP_141(Double, D), 1110 1111 DECLARE_GETSETNATIVE(Byte, B), 1112 DECLARE_GETSETNATIVE(Short, S), 1113 DECLARE_GETSETNATIVE(Char, C), 1114 DECLARE_GETSETNATIVE(Int, I), 1115 DECLARE_GETSETNATIVE(Long, J), 1116 DECLARE_GETSETNATIVE(Float, F), 1117 DECLARE_GETSETNATIVE(Double, D), 1118 1119 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, 1120 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, 1121 1122 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, 1123 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, 1124// {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, 1125// {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, 1126 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, 1127 1128 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, 1129 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, 1130 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, 1131 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, 1132 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, 1133 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, 1134 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, 1135 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, 1136 1137 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, 1138 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, 1139 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, 1140 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, 1141 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, 1142 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} 1143 1144}; 1145 1146// These are the old methods prior to the JSR 166 changes in 1.6.0 1147static JNINativeMethod methods_15[] = { 1148 1149 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, 1150 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, 1151 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, 1152 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, 1153 1154 1155 DECLARE_GETSETOOP(Boolean, Z), 1156 DECLARE_GETSETOOP(Byte, B), 1157 DECLARE_GETSETOOP(Short, S), 1158 DECLARE_GETSETOOP(Char, C), 1159 DECLARE_GETSETOOP(Int, I), 1160 DECLARE_GETSETOOP(Long, J), 1161 DECLARE_GETSETOOP(Float, F), 1162 DECLARE_GETSETOOP(Double, D), 1163 1164 DECLARE_GETSETNATIVE(Byte, B), 1165 DECLARE_GETSETNATIVE(Short, S), 1166 DECLARE_GETSETNATIVE(Char, C), 1167 DECLARE_GETSETNATIVE(Int, I), 1168 DECLARE_GETSETNATIVE(Long, J), 1169 DECLARE_GETSETNATIVE(Float, F), 1170 DECLARE_GETSETNATIVE(Double, D), 1171 1172 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, 1173 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, 1174 1175 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, 1176 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, 1177// {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, 1178// {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, 1179 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, 1180 1181 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, 1182 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, 1183 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, 1184 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, 1185 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, 1186 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, 1187 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, 1188 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, 1189 1190 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, 1191 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, 1192 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, 1193 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, 1194 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, 1195 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, 1196 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, 1197 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, 1198 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, 1199 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, 1200 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} 1201 1202}; 1203 1204// These are the correct methods, moving forward: 1205static JNINativeMethod methods[] = { 1206 1207 {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, 1208 {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, 1209 {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, 1210 {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, 1211 1212 1213 DECLARE_GETSETOOP(Boolean, Z), 1214 DECLARE_GETSETOOP(Byte, B), 1215 DECLARE_GETSETOOP(Short, S), 1216 DECLARE_GETSETOOP(Char, C), 1217 DECLARE_GETSETOOP(Int, I), 1218 DECLARE_GETSETOOP(Long, J), 1219 DECLARE_GETSETOOP(Float, F), 1220 DECLARE_GETSETOOP(Double, D), 1221 1222 DECLARE_GETSETNATIVE(Byte, B), 1223 DECLARE_GETSETNATIVE(Short, S), 1224 DECLARE_GETSETNATIVE(Char, C), 1225 DECLARE_GETSETNATIVE(Int, I), 1226 DECLARE_GETSETNATIVE(Long, J), 1227 DECLARE_GETSETNATIVE(Float, F), 1228 DECLARE_GETSETNATIVE(Double, D), 1229 1230 {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, 1231 {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, 1232 1233 {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, 1234 {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, 1235// {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, 1236// {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, 1237 {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, 1238 1239 {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, 1240 {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, 1241 {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, 1242 {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, 1243 {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, 1244 {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, 1245 {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, 1246 {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, 1247 1248 {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, 1249 {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, 1250 {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, 1251 {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, 1252 {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, 1253 {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, 1254 {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, 1255 {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, 1256 {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, 1257 {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, 1258 {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, 1259 {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, 1260 {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, 1261 {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, 1262 {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} 1263 1264// {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)}, 1265 1266// {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, 1267// {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} 1268// {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, 1269// {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} 1270 1271}; 1272 1273JNINativeMethod loadavg_method[] = { 1274 {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} 1275}; 1276 1277JNINativeMethod prefetch_methods[] = { 1278 {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, 1279 {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, 1280 {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, 1281 {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} 1282}; 1283 1284JNINativeMethod memcopy_methods[] = { 1285 {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, 1286 {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} 1287}; 1288 1289JNINativeMethod memcopy_methods_15[] = { 1290 {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, 1291 {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} 1292}; 1293 1294 1295#undef CC 1296#undef FN_PTR 1297 1298#undef ADR 1299#undef LANG 1300#undef OBJ 1301#undef CLS 1302#undef CTR 1303#undef FLD 1304#undef MTH 1305#undef THR 1306#undef DC0_Args 1307#undef DC1_Args 1308 1309#undef DECLARE_GETSETOOP 1310#undef DECLARE_GETSETNATIVE 1311 1312 1313// This one function is exported, used by NativeLookup. 1314// The Unsafe_xxx functions above are called only from the interpreter. 1315// The optimizer looks at names and signatures to recognize 1316// individual functions. 1317 1318JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) 1319 UnsafeWrapper("JVM_RegisterUnsafeMethods"); 1320 { 1321 ThreadToNativeFromVM ttnfv(thread); 1322 { 1323 env->RegisterNatives(unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); 1324 if (env->ExceptionOccurred()) { 1325 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1326 tty->print_cr("Warning: SDK 1.6 Unsafe.loadavg not found."); 1327 } 1328 env->ExceptionClear(); 1329 } 1330 } 1331 { 1332 env->RegisterNatives(unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); 1333 if (env->ExceptionOccurred()) { 1334 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1335 tty->print_cr("Warning: SDK 1.6 Unsafe.prefetchRead/Write not found."); 1336 } 1337 env->ExceptionClear(); 1338 } 1339 } 1340 { 1341 env->RegisterNatives(unsafecls, memcopy_methods, sizeof(memcopy_methods)/sizeof(JNINativeMethod)); 1342 if (env->ExceptionOccurred()) { 1343 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1344 tty->print_cr("Warning: SDK 1.7 Unsafe.copyMemory not found."); 1345 } 1346 env->ExceptionClear(); 1347 env->RegisterNatives(unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); 1348 if (env->ExceptionOccurred()) { 1349 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1350 tty->print_cr("Warning: SDK 1.5 Unsafe.copyMemory not found."); 1351 } 1352 env->ExceptionClear(); 1353 } 1354 } 1355 } 1356 int status = env->RegisterNatives(unsafecls, methods, sizeof(methods)/sizeof(JNINativeMethod)); 1357 if (env->ExceptionOccurred()) { 1358 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1359 tty->print_cr("Warning: SDK 1.6 version of Unsafe not found."); 1360 } 1361 env->ExceptionClear(); 1362 // %%% For now, be backward compatible with an older class: 1363 status = env->RegisterNatives(unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); 1364 } 1365 if (env->ExceptionOccurred()) { 1366 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1367 tty->print_cr("Warning: SDK 1.5 version of Unsafe not found."); 1368 } 1369 env->ExceptionClear(); 1370 // %%% For now, be backward compatible with an older class: 1371 status = env->RegisterNatives(unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); 1372 } 1373 if (env->ExceptionOccurred()) { 1374 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1375 tty->print_cr("Warning: SDK 1.4.1 version of Unsafe not found."); 1376 } 1377 env->ExceptionClear(); 1378 // %%% For now, be backward compatible with an older class: 1379 status = env->RegisterNatives(unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); 1380 } 1381 guarantee(status == 0, "register unsafe natives"); 1382 } 1383JVM_END 1384