Mercurial > hg > graal-jvmci-8
diff src/share/vm/prims/unsafe.cpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | ba764ed4b6f2 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/prims/unsafe.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,1338 @@ +/* + * Copyright 2000-2007 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +/* + * Implementation of class sun.misc.Unsafe + */ + +#include "incls/_precompiled.incl" +#include "incls/_unsafe.cpp.incl" + +#define MAX_OBJECT_SIZE \ + ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ + + ((julong)max_jint * sizeof(double)) ) + + +#define UNSAFE_ENTRY(result_type, header) \ + JVM_ENTRY(result_type, header) + +// Can't use UNSAFE_LEAF because it has the signature of a straight +// call into the runtime (just like JVM_LEAF, funny that) but it's +// called like a Java Native and thus the wrapper built for it passes +// arguments like a JNI call. It expects those arguments to be popped +// from the stack on Intel like all good JNI args are, and adjusts the +// stack according. Since the JVM_LEAF call expects no extra +// arguments the stack isn't popped in the C code, is pushed by the +// wrapper and we get sick. +//#define UNSAFE_LEAF(result_type, header) \ +// JVM_LEAF(result_type, header) + +#define UNSAFE_END JVM_END + +#define UnsafeWrapper(arg) /*nothing, for the present*/ + + +inline void* addr_from_java(jlong addr) { + // This assert fails in a variety of ways on 32-bit systems. + // It is impossible to predict whether native code that converts + // pointers to longs will sign-extend or zero-extend the addresses. + //assert(addr == (uintptr_t)addr, "must not be odd high bits"); + return (void*)(uintptr_t)addr; +} + +inline jlong addr_to_java(void* p) { + assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); + return (uintptr_t)p; +} + + +// Note: The VM's obj_field and related accessors use byte-scaled +// ("unscaled") offsets, just as the unsafe methods do. + +// However, the method Unsafe.fieldOffset explicitly declines to +// guarantee this. The field offset values manipulated by the Java user +// through the Unsafe API are opaque cookies that just happen to be byte +// offsets. We represent this state of affairs by passing the cookies +// through conversion functions when going between the VM and the Unsafe API. +// The conversion functions just happen to be no-ops at present. + +inline jlong field_offset_to_byte_offset(jlong field_offset) { + return field_offset; +} + +inline jlong field_offset_from_byte_offset(jlong byte_offset) { + return byte_offset; +} + +inline jint invocation_key_from_method_slot(jint slot) { + return slot; +} + +inline jint invocation_key_to_method_slot(jint key) { + return key; +} + +inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { + jlong byte_offset = field_offset_to_byte_offset(field_offset); +#ifdef ASSERT + if (p != NULL) { + assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); + if (byte_offset == (jint)byte_offset) { + void* ptr_plus_disp = (address)p + byte_offset; + assert((void*)p->obj_field_addr((jint)byte_offset) == ptr_plus_disp, + "raw [ptr+disp] must be consistent with oop::field_base"); + } + } +#endif + if (sizeof(char*) == sizeof(jint)) // (this constant folds!) + return (address)p + (jint) byte_offset; + else + return (address)p + byte_offset; +} + +// Externally callable versions: +// (Use these in compiler intrinsics which emulate unsafe primitives.) +jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { + return field_offset; +} +jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { + return byte_offset; +} +jint Unsafe_invocation_key_from_method_slot(jint slot) { + return invocation_key_from_method_slot(slot); +} +jint Unsafe_invocation_key_to_method_slot(jint key) { + return invocation_key_to_method_slot(key); +} + + +///// Data in the Java heap. + +#define GET_FIELD(obj, offset, type_name, v) \ + oop p = JNIHandles::resolve(obj); \ + type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset) + +#define SET_FIELD(obj, offset, type_name, x) \ + oop p = JNIHandles::resolve(obj); \ + *(type_name*)index_oop_from_field_offset_long(p, offset) = x + +#define GET_FIELD_VOLATILE(obj, offset, type_name, v) \ + oop p = JNIHandles::resolve(obj); \ + volatile type_name v = *(volatile type_name*)index_oop_from_field_offset_long(p, offset) + +#define SET_FIELD_VOLATILE(obj, offset, type_name, x) \ + oop p = JNIHandles::resolve(obj); \ + *(volatile type_name*)index_oop_from_field_offset_long(p, offset) = x; \ + OrderAccess::fence(); + +// Get/SetObject must be special-cased, since it works with handles. + +// The xxx140 variants for backward compatibility do not allow a full-width offset. +UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) + UnsafeWrapper("Unsafe_GetObject"); + if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); + GET_FIELD(obj, offset, oop, v); + return JNIHandles::make_local(env, v); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h)) + UnsafeWrapper("Unsafe_SetObject"); + if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); + oop x = JNIHandles::resolve(x_h); + //SET_FIELD(obj, offset, oop, x); + oop p = JNIHandles::resolve(obj); + if (x != NULL) { + // If there is a heap base pointer, we are obliged to emit a store barrier. + oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); + } else { + *(oop*)index_oop_from_field_offset_long(p, offset) = x; + } +UNSAFE_END + +// The normal variants allow a null base pointer with an arbitrary address. +// But if the base pointer is non-null, the offset should make some sense. +// That is, it should be in the range [0, MAX_OBJECT_SIZE]. +UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) + UnsafeWrapper("Unsafe_GetObject"); + GET_FIELD(obj, offset, oop, v); + return JNIHandles::make_local(env, v); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) + UnsafeWrapper("Unsafe_SetObject"); + oop x = JNIHandles::resolve(x_h); + oop p = JNIHandles::resolve(obj); + oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); +UNSAFE_END + +UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) + UnsafeWrapper("Unsafe_GetObjectVolatile"); + GET_FIELD_VOLATILE(obj, offset, oop, v); + return JNIHandles::make_local(env, v); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) + UnsafeWrapper("Unsafe_SetObjectVolatile"); + oop x = JNIHandles::resolve(x_h); + oop p = JNIHandles::resolve(obj); + oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); + OrderAccess::fence(); +UNSAFE_END + +// Volatile long versions must use locks if !VM_Version::supports_cx8(). +// support_cx8 is a surrogate for 'supports atomic long memory ops'. + +UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) + UnsafeWrapper("Unsafe_GetLongVolatile"); + { + if (VM_Version::supports_cx8()) { + GET_FIELD_VOLATILE(obj, offset, jlong, v); + return v; + } + else { + Handle p (THREAD, JNIHandles::resolve(obj)); + jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); + ObjectLocker ol(p, THREAD); + jlong value = *addr; + return value; + } + } +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) + UnsafeWrapper("Unsafe_SetLongVolatile"); + { + if (VM_Version::supports_cx8()) { + SET_FIELD_VOLATILE(obj, offset, jlong, x); + } + else { + Handle p (THREAD, JNIHandles::resolve(obj)); + jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); + ObjectLocker ol(p, THREAD); + *addr = x; + } + } +UNSAFE_END + + +#define DEFINE_GETSETOOP(jboolean, Boolean) \ + \ +UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \ + UnsafeWrapper("Unsafe_Get"#Boolean); \ + if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \ + GET_FIELD(obj, offset, jboolean, v); \ + return v; \ +UNSAFE_END \ + \ +UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \ + UnsafeWrapper("Unsafe_Set"#Boolean); \ + if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \ + SET_FIELD(obj, offset, jboolean, x); \ +UNSAFE_END \ + \ +UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ + UnsafeWrapper("Unsafe_Get"#Boolean); \ + GET_FIELD(obj, offset, jboolean, v); \ + return v; \ +UNSAFE_END \ + \ +UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ + UnsafeWrapper("Unsafe_Set"#Boolean); \ + SET_FIELD(obj, offset, jboolean, x); \ +UNSAFE_END \ + \ +// END DEFINE_GETSETOOP. + + +#define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \ + \ +UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \ + UnsafeWrapper("Unsafe_Get"#Boolean); \ + GET_FIELD_VOLATILE(obj, offset, jboolean, v); \ + return v; \ +UNSAFE_END \ + \ +UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \ + UnsafeWrapper("Unsafe_Set"#Boolean); \ + SET_FIELD_VOLATILE(obj, offset, jboolean, x); \ +UNSAFE_END \ + \ +// END DEFINE_GETSETOOP_VOLATILE. + +DEFINE_GETSETOOP(jboolean, Boolean) +DEFINE_GETSETOOP(jbyte, Byte) +DEFINE_GETSETOOP(jshort, Short); +DEFINE_GETSETOOP(jchar, Char); +DEFINE_GETSETOOP(jint, Int); +DEFINE_GETSETOOP(jlong, Long); +DEFINE_GETSETOOP(jfloat, Float); +DEFINE_GETSETOOP(jdouble, Double); + +DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) +DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) +DEFINE_GETSETOOP_VOLATILE(jshort, Short); +DEFINE_GETSETOOP_VOLATILE(jchar, Char); +DEFINE_GETSETOOP_VOLATILE(jint, Int); +// no long -- handled specially +DEFINE_GETSETOOP_VOLATILE(jfloat, Float); +DEFINE_GETSETOOP_VOLATILE(jdouble, Double); + +#undef DEFINE_GETSETOOP + +// The non-intrinsified versions of setOrdered just use setVolatile + +UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) \ + UnsafeWrapper("Unsafe_SetOrderedInt"); \ + SET_FIELD_VOLATILE(obj, offset, jint, x); \ +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) + UnsafeWrapper("Unsafe_SetOrderedObject"); + oop x = JNIHandles::resolve(x_h); + oop p = JNIHandles::resolve(obj); + oop_store((oop*)index_oop_from_field_offset_long(p, offset), x); + OrderAccess::fence(); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x)) + UnsafeWrapper("Unsafe_SetOrderedLong"); + { + if (VM_Version::supports_cx8()) { + SET_FIELD_VOLATILE(obj, offset, jlong, x); + } + else { + Handle p (THREAD, JNIHandles::resolve(obj)); + jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); + ObjectLocker ol(p, THREAD); + *addr = x; + } + } +UNSAFE_END + +////// Data in the C heap. + +// Note: These do not throw NullPointerException for bad pointers. +// They just crash. Only a oop base pointer can generate a NullPointerException. +// +#define DEFINE_GETSETNATIVE(java_type, Type, native_type) \ + \ +UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \ + UnsafeWrapper("Unsafe_GetNative"#Type); \ + void* p = addr_from_java(addr); \ + JavaThread* t = JavaThread::current(); \ + t->set_doing_unsafe_access(true); \ + java_type x = *(volatile native_type*)p; \ + t->set_doing_unsafe_access(false); \ + return x; \ +UNSAFE_END \ + \ +UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \ + UnsafeWrapper("Unsafe_SetNative"#Type); \ + JavaThread* t = JavaThread::current(); \ + t->set_doing_unsafe_access(true); \ + void* p = addr_from_java(addr); \ + *(volatile native_type*)p = x; \ + t->set_doing_unsafe_access(false); \ +UNSAFE_END \ + \ +// END DEFINE_GETSETNATIVE. + +DEFINE_GETSETNATIVE(jbyte, Byte, signed char) +DEFINE_GETSETNATIVE(jshort, Short, signed short); +DEFINE_GETSETNATIVE(jchar, Char, unsigned short); +DEFINE_GETSETNATIVE(jint, Int, jint); +// no long -- handled specially +DEFINE_GETSETNATIVE(jfloat, Float, float); +DEFINE_GETSETNATIVE(jdouble, Double, double); + +#undef DEFINE_GETSETNATIVE + +UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr)) + UnsafeWrapper("Unsafe_GetNativeLong"); + JavaThread* t = JavaThread::current(); + // We do it this way to avoid problems with access to heap using 64 + // bit loads, as jlong in heap could be not 64-bit aligned, and on + // some CPUs (SPARC) it leads to SIGBUS. + t->set_doing_unsafe_access(true); + void* p = addr_from_java(addr); + jlong x; + if (((intptr_t)p & 7) == 0) { + // jlong is aligned, do a volatile access + x = *(volatile jlong*)p; + } else { + jlong_accessor acc; + acc.words[0] = ((volatile jint*)p)[0]; + acc.words[1] = ((volatile jint*)p)[1]; + x = acc.long_value; + } + t->set_doing_unsafe_access(false); + return x; +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) + UnsafeWrapper("Unsafe_SetNativeLong"); + JavaThread* t = JavaThread::current(); + // see comment for Unsafe_GetNativeLong + t->set_doing_unsafe_access(true); + void* p = addr_from_java(addr); + if (((intptr_t)p & 7) == 0) { + // jlong is aligned, do a volatile access + *(volatile jlong*)p = x; + } else { + jlong_accessor acc; + acc.long_value = x; + ((volatile jint*)p)[0] = acc.words[0]; + ((volatile jint*)p)[1] = acc.words[1]; + } + t->set_doing_unsafe_access(false); +UNSAFE_END + + +UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr)) + UnsafeWrapper("Unsafe_GetNativeAddress"); + void* p = addr_from_java(addr); + return addr_to_java(*(void**)p); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x)) + UnsafeWrapper("Unsafe_SetNativeAddress"); + void* p = addr_from_java(addr); + *(void**)p = addr_from_java(x); +UNSAFE_END + + +////// Allocation requests + +UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) + UnsafeWrapper("Unsafe_AllocateInstance"); + { + ThreadToNativeFromVM ttnfv(thread); + return env->AllocObject(cls); + } +UNSAFE_END + +UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size)) + UnsafeWrapper("Unsafe_AllocateMemory"); + size_t sz = (size_t)size; + if (sz != (julong)size || size < 0) { + THROW_0(vmSymbols::java_lang_IllegalArgumentException()); + } + if (sz == 0) { + return 0; + } + sz = round_to(sz, HeapWordSize); + void* x = os::malloc(sz); + if (x == NULL) { + THROW_0(vmSymbols::java_lang_OutOfMemoryError()); + } + //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize); + return addr_to_java(x); +UNSAFE_END + +UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) + UnsafeWrapper("Unsafe_ReallocateMemory"); + void* p = addr_from_java(addr); + size_t sz = (size_t)size; + if (sz != (julong)size || size < 0) { + THROW_0(vmSymbols::java_lang_IllegalArgumentException()); + } + if (sz == 0) { + os::free(p); + return 0; + } + sz = round_to(sz, HeapWordSize); + void* x = (p == NULL) ? os::malloc(sz) : os::realloc(p, sz); + if (x == NULL) { + THROW_0(vmSymbols::java_lang_OutOfMemoryError()); + } + return addr_to_java(x); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr)) + UnsafeWrapper("Unsafe_FreeMemory"); + void* p = addr_from_java(addr); + if (p == NULL) { + return; + } + os::free(p); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value)) + UnsafeWrapper("Unsafe_SetMemory"); + size_t sz = (size_t)size; + if (sz != (julong)size || size < 0) { + THROW(vmSymbols::java_lang_IllegalArgumentException()); + } + char* p = (char*) addr_from_java(addr); + Copy::fill_to_memory_atomic(p, sz, value); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) + UnsafeWrapper("Unsafe_SetMemory"); + size_t sz = (size_t)size; + if (sz != (julong)size || size < 0) { + THROW(vmSymbols::java_lang_IllegalArgumentException()); + } + oop base = JNIHandles::resolve(obj); + void* p = index_oop_from_field_offset_long(base, offset); + Copy::fill_to_memory_atomic(p, sz, value); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size)) + UnsafeWrapper("Unsafe_CopyMemory"); + if (size == 0) { + return; + } + size_t sz = (size_t)size; + if (sz != (julong)size || size < 0) { + THROW(vmSymbols::java_lang_IllegalArgumentException()); + } + void* src = addr_from_java(srcAddr); + void* dst = addr_from_java(dstAddr); + Copy::conjoint_memory_atomic(src, dst, sz); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) + UnsafeWrapper("Unsafe_CopyMemory"); + if (size == 0) { + return; + } + size_t sz = (size_t)size; + if (sz != (julong)size || size < 0) { + THROW(vmSymbols::java_lang_IllegalArgumentException()); + } + oop srcp = JNIHandles::resolve(srcObj); + oop dstp = JNIHandles::resolve(dstObj); + if (dstp != NULL && !dstp->is_typeArray()) { + // NYI: This works only for non-oop arrays at present. + // Generalizing it would be reasonable, but requires card marking. + // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad. + THROW(vmSymbols::java_lang_IllegalArgumentException()); + } + void* src = index_oop_from_field_offset_long(srcp, srcOffset); + void* dst = index_oop_from_field_offset_long(dstp, dstOffset); + Copy::conjoint_memory_atomic(src, dst, sz); +UNSAFE_END + + +////// Random queries + +// See comment at file start about UNSAFE_LEAF +//UNSAFE_LEAF(jint, Unsafe_AddressSize()) +UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe)) + UnsafeWrapper("Unsafe_AddressSize"); + return sizeof(void*); +UNSAFE_END + +// See comment at file start about UNSAFE_LEAF +//UNSAFE_LEAF(jint, Unsafe_PageSize()) +UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe)) + UnsafeWrapper("Unsafe_PageSize"); + return os::vm_page_size(); +UNSAFE_END + +jint find_field_offset(jobject field, int must_be_static, TRAPS) { + if (field == NULL) { + THROW_0(vmSymbols::java_lang_NullPointerException()); + } + + oop reflected = JNIHandles::resolve_non_null(field); + oop mirror = java_lang_reflect_Field::clazz(reflected); + klassOop k = java_lang_Class::as_klassOop(mirror); + int slot = java_lang_reflect_Field::slot(reflected); + int modifiers = java_lang_reflect_Field::modifiers(reflected); + + if (must_be_static >= 0) { + int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); + if (must_be_static != really_is_static) { + THROW_0(vmSymbols::java_lang_IllegalArgumentException()); + } + } + + int offset = instanceKlass::cast(k)->offset_from_fields(slot); + return field_offset_from_byte_offset(offset); +} + +UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) + UnsafeWrapper("Unsafe_ObjectFieldOffset"); + return find_field_offset(field, 0, THREAD); +UNSAFE_END + +UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field)) + UnsafeWrapper("Unsafe_StaticFieldOffset"); + return find_field_offset(field, 1, THREAD); +UNSAFE_END + +UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field)) + UnsafeWrapper("Unsafe_StaticFieldBase"); + // Note: In this VM implementation, a field address is always a short + // offset from the base of a a klass metaobject. Thus, the full dynamic + // range of the return type is never used. However, some implementations + // might put the static field inside an array shared by many classes, + // or even at a fixed address, in which case the address could be quite + // large. In that last case, this function would return NULL, since + // the address would operate alone, without any base pointer. + + if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); + + oop reflected = JNIHandles::resolve_non_null(field); + oop mirror = java_lang_reflect_Field::clazz(reflected); + int modifiers = java_lang_reflect_Field::modifiers(reflected); + + if ((modifiers & JVM_ACC_STATIC) == 0) { + THROW_0(vmSymbols::java_lang_IllegalArgumentException()); + } + + return JNIHandles::make_local(env, java_lang_Class::as_klassOop(mirror)); +UNSAFE_END + +//@deprecated +UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field)) + UnsafeWrapper("Unsafe_FieldOffset"); + // tries (but fails) to be polymorphic between static and non-static: + jlong offset = find_field_offset(field, -1, THREAD); + guarantee(offset == (jint)offset, "offset fits in 32 bits"); + return (jint)offset; +UNSAFE_END + +//@deprecated +UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz)) + UnsafeWrapper("Unsafe_StaticFieldBase"); + if (clazz == NULL) { + THROW_0(vmSymbols::java_lang_NullPointerException()); + } + return JNIHandles::make_local(env, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz))); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz)) + UnsafeWrapper("Unsafe_EnsureClassInitialized"); + if (clazz == NULL) { + THROW(vmSymbols::java_lang_NullPointerException()); + } + oop mirror = JNIHandles::resolve_non_null(clazz); + instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(mirror)); + if (k != NULL) { + k->initialize(CHECK); + } +UNSAFE_END + +static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { + if (acls == NULL) { + THROW(vmSymbols::java_lang_NullPointerException()); + } + oop mirror = JNIHandles::resolve_non_null(acls); + klassOop k = java_lang_Class::as_klassOop(mirror); + if (k == NULL || !k->klass_part()->oop_is_array()) { + THROW(vmSymbols::java_lang_InvalidClassException()); + } else if (k->klass_part()->oop_is_objArray()) { + base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); + scale = oopSize; + } else if (k->klass_part()->oop_is_typeArray()) { + typeArrayKlass* tak = typeArrayKlass::cast(k); + base = tak->array_header_in_bytes(); + assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); + scale = (1 << tak->log2_element_size()); + } else { + ShouldNotReachHere(); + } +} + +UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls)) + UnsafeWrapper("Unsafe_ArrayBaseOffset"); + int base, scale; + getBaseAndScale(base, scale, acls, CHECK_0); + return field_offset_from_byte_offset(base); +UNSAFE_END + + +UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls)) + UnsafeWrapper("Unsafe_ArrayIndexScale"); + int base, scale; + getBaseAndScale(base, scale, acls, CHECK_0); + // This VM packs both fields and array elements down to the byte. + // But watch out: If this changes, so that array references for + // a given primitive type (say, T_BOOLEAN) use different memory units + // than fields, this method MUST return zero for such arrays. + // For example, the VM used to store sub-word sized fields in full + // words in the object layout, so that accessors like getByte(Object,int) + // did not really do what one might expect for arrays. Therefore, + // this function used to report a zero scale factor, so that the user + // would know not to attempt to access sub-word array elements. + // // Code for unpacked fields: + // if (scale < wordSize) return 0; + + // The following allows for a pretty general fieldOffset cookie scheme, + // but requires it to be linear in byte offset. + return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); +UNSAFE_END + + +static inline void throw_new(JNIEnv *env, const char *ename) { + char buf[100]; + strcpy(buf, "java/lang/"); + strcat(buf, ename); + jclass cls = env->FindClass(buf); + char* msg = NULL; + env->ThrowNew(cls, msg); +} + +static jclass Unsafe_DefineClass(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { + { + // Code lifted from JDK 1.3 ClassLoader.c + + jbyte *body; + char *utfName; + jclass result = 0; + char buf[128]; + + if (UsePerfData) { + ClassLoader::unsafe_defineClassCallCounter()->inc(); + } + + if (data == NULL) { + throw_new(env, "NullPointerException"); + return 0; + } + + /* Work around 4153825. malloc crashes on Solaris when passed a + * negative size. + */ + if (length < 0) { + throw_new(env, "ArrayIndexOutOfBoundsException"); + return 0; + } + + body = NEW_C_HEAP_ARRAY(jbyte, length); + + if (body == 0) { + throw_new(env, "OutOfMemoryError"); + return 0; + } + + env->GetByteArrayRegion(data, offset, length, body); + + if (env->ExceptionOccurred()) + goto free_body; + + if (name != NULL) { + uint len = env->GetStringUTFLength(name); + int unicode_len = env->GetStringLength(name); + if (len >= sizeof(buf)) { + utfName = NEW_C_HEAP_ARRAY(char, len + 1); + if (utfName == NULL) { + throw_new(env, "OutOfMemoryError"); + goto free_body; + } + } else { + utfName = buf; + } + env->GetStringUTFRegion(name, 0, unicode_len, utfName); + //VerifyFixClassname(utfName); + for (uint i = 0; i < len; i++) { + if (utfName[i] == '.') utfName[i] = '/'; + } + } else { + utfName = NULL; + } + + result = JVM_DefineClass(env, utfName, loader, body, length, pd); + + if (utfName && utfName != buf) + FREE_C_HEAP_ARRAY(char, utfName); + + free_body: + FREE_C_HEAP_ARRAY(jbyte, body); + return result; + } +} + + +UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length)) + UnsafeWrapper("Unsafe_DefineClass"); + { + ThreadToNativeFromVM ttnfv(thread); + + int depthFromDefineClass0 = 1; + jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0); + jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller); + jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller); + + return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); + } +UNSAFE_END + + +UNSAFE_ENTRY(jclass, Unsafe_DefineClass1(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd)) + UnsafeWrapper("Unsafe_DefineClass"); + { + ThreadToNativeFromVM ttnfv(thread); + + return Unsafe_DefineClass(env, name, data, offset, length, loader, pd); + } +UNSAFE_END + + +UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) + UnsafeWrapper("Unsafe_MonitorEnter"); + { + if (jobj == NULL) { + THROW(vmSymbols::java_lang_NullPointerException()); + } + Handle obj(thread, JNIHandles::resolve_non_null(jobj)); + ObjectSynchronizer::jni_enter(obj, CHECK); + } +UNSAFE_END + + +UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj)) + UnsafeWrapper("Unsafe_TryMonitorEnter"); + { + if (jobj == NULL) { + THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); + } + Handle obj(thread, JNIHandles::resolve_non_null(jobj)); + bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0); + return (res ? JNI_TRUE : JNI_FALSE); + } +UNSAFE_END + + +UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj)) + UnsafeWrapper("Unsafe_MonitorExit"); + { + if (jobj == NULL) { + THROW(vmSymbols::java_lang_NullPointerException()); + } + Handle obj(THREAD, JNIHandles::resolve_non_null(jobj)); + ObjectSynchronizer::jni_exit(obj(), CHECK); + } +UNSAFE_END + + +UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) + UnsafeWrapper("Unsafe_ThrowException"); + { + ThreadToNativeFromVM ttnfv(thread); + env->Throw(thr); + } +UNSAFE_END + +// JSR166 ------------------------------------------------------------------ + +UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) + UnsafeWrapper("Unsafe_CompareAndSwapObject"); + oop x = JNIHandles::resolve(x_h); + oop e = JNIHandles::resolve(e_h); + oop p = JNIHandles::resolve(obj); + intptr_t* addr = (intptr_t *)index_oop_from_field_offset_long(p, offset); + intptr_t res = Atomic::cmpxchg_ptr((intptr_t)x, addr, (intptr_t)e); + jboolean success = (res == (intptr_t)e); + if (success) + update_barrier_set((oop*)addr, x); + return success; +UNSAFE_END + +UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) + UnsafeWrapper("Unsafe_CompareAndSwapInt"); + oop p = JNIHandles::resolve(obj); + jint* addr = (jint *) index_oop_from_field_offset_long(p, offset); + return (jint)(Atomic::cmpxchg(x, addr, e)) == e; +UNSAFE_END + +UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) + UnsafeWrapper("Unsafe_CompareAndSwapLong"); + Handle p (THREAD, JNIHandles::resolve(obj)); + jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset)); + if (VM_Version::supports_cx8()) + return (jlong)(Atomic::cmpxchg(x, addr, e)) == e; + else { + jboolean success = false; + ObjectLocker ol(p, THREAD); + if (*addr == e) { *addr = x; success = true; } + return success; + } +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) + UnsafeWrapper("Unsafe_Park"); + JavaThreadParkedState jtps(thread, time != 0); + thread->parker()->park(isAbsolute != 0, time); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) + UnsafeWrapper("Unsafe_Unpark"); + Parker* p = NULL; + if (jthread != NULL) { + oop java_thread = JNIHandles::resolve_non_null(jthread); + if (java_thread != NULL) { + jlong lp = java_lang_Thread::park_event(java_thread); + if (lp != 0) { + // This cast is OK even though the jlong might have been read + // non-atomically on 32bit systems, since there, one word will + // always be zero anyway and the value set is always the same + p = (Parker*)addr_from_java(lp); + } else { + // Grab lock if apparently null or using older version of library + MutexLocker mu(Threads_lock); + java_thread = JNIHandles::resolve_non_null(jthread); + if (java_thread != NULL) { + JavaThread* thr = java_lang_Thread::thread(java_thread); + if (thr != NULL) { + p = thr->parker(); + if (p != NULL) { // Bind to Java thread for next time. + java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); + } + } + } + } + } + } + if (p != NULL) { + p->unpark(); + } +UNSAFE_END + +UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) + UnsafeWrapper("Unsafe_Loadavg"); + const int max_nelem = 3; + double la[max_nelem]; + jint ret; + + typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); + assert(a->is_typeArray(), "must be type array"); + + if (nelem < 0 || nelem > max_nelem || a->length() < nelem) { + ThreadToNativeFromVM ttnfv(thread); + throw_new(env, "ArrayIndexOutOfBoundsException"); + return -1; + } + + ret = os::loadavg(la, nelem); + if (ret == -1) return -1; + + // if successful, ret is the number of samples actually retrieved. + assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); + switch(ret) { + case 3: a->double_at_put(2, (jdouble)la[2]); // fall through + case 2: a->double_at_put(1, (jdouble)la[1]); // fall through + case 1: a->double_at_put(0, (jdouble)la[0]); break; + } + return ret; +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) + UnsafeWrapper("Unsafe_PrefetchRead"); + oop p = JNIHandles::resolve(obj); + void* addr = index_oop_from_field_offset_long(p, 0); + Prefetch::read(addr, (intx)offset); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset)) + UnsafeWrapper("Unsafe_PrefetchWrite"); + oop p = JNIHandles::resolve(obj); + void* addr = index_oop_from_field_offset_long(p, 0); + Prefetch::write(addr, (intx)offset); +UNSAFE_END + + +/// JVM_RegisterUnsafeMethods + +#define ADR "J" + +#define LANG "Ljava/lang/" + +#define OBJ LANG"Object;" +#define CLS LANG"Class;" +#define CTR LANG"reflect/Constructor;" +#define FLD LANG"reflect/Field;" +#define MTH LANG"reflect/Method;" +#define THR LANG"Throwable;" + +#define DC0_Args LANG"String;[BII" +#define DC1_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;" + +#define CC (char*) /*cast a literal from (const char*)*/ +#define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) + +// define deprecated accessors for compabitility with 1.4.0 +#define DECLARE_GETSETOOP_140(Boolean, Z) \ + {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \ + {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)} + +// Note: In 1.4.1, getObject and kin take both int and long offsets. +#define DECLARE_GETSETOOP_141(Boolean, Z) \ + {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ + {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)} + +// Note: In 1.5.0, there are volatile versions too +#define DECLARE_GETSETOOP(Boolean, Z) \ + {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \ + {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \ + {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \ + {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)} + + +#define DECLARE_GETSETNATIVE(Byte, B) \ + {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \ + {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)} + + + +// %%% These are temporarily supported until the SDK sources +// contain the necessarily updated Unsafe.java. +static JNINativeMethod methods_140[] = { + + {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)}, + {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)}, + + DECLARE_GETSETOOP_140(Boolean, Z), + DECLARE_GETSETOOP_140(Byte, B), + DECLARE_GETSETOOP_140(Short, S), + DECLARE_GETSETOOP_140(Char, C), + DECLARE_GETSETOOP_140(Int, I), + DECLARE_GETSETOOP_140(Long, J), + DECLARE_GETSETOOP_140(Float, F), + DECLARE_GETSETOOP_140(Double, D), + + DECLARE_GETSETNATIVE(Byte, B), + DECLARE_GETSETNATIVE(Short, S), + DECLARE_GETSETNATIVE(Char, C), + DECLARE_GETSETNATIVE(Int, I), + DECLARE_GETSETNATIVE(Long, J), + DECLARE_GETSETNATIVE(Float, F), + DECLARE_GETSETNATIVE(Double, D), + + {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, + {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, + + {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, + {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, +// {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, +// {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, + {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, + + {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, //deprecated + {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, //deprecated + {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, + {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, + {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, + {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, + {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, + + {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, + {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, + {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, + {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, + {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, + {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} +}; + +// These are the old methods prior to the JSR 166 changes in 1.5.0 +static JNINativeMethod methods_141[] = { + + {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, + {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, + + DECLARE_GETSETOOP_141(Boolean, Z), + DECLARE_GETSETOOP_141(Byte, B), + DECLARE_GETSETOOP_141(Short, S), + DECLARE_GETSETOOP_141(Char, C), + DECLARE_GETSETOOP_141(Int, I), + DECLARE_GETSETOOP_141(Long, J), + DECLARE_GETSETOOP_141(Float, F), + DECLARE_GETSETOOP_141(Double, D), + + DECLARE_GETSETNATIVE(Byte, B), + DECLARE_GETSETNATIVE(Short, S), + DECLARE_GETSETNATIVE(Char, C), + DECLARE_GETSETNATIVE(Int, I), + DECLARE_GETSETNATIVE(Long, J), + DECLARE_GETSETNATIVE(Float, F), + DECLARE_GETSETNATIVE(Double, D), + + {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, + {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, + + {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, + {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, +// {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, +// {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, + {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, + + {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, + {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, + {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, + {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, + {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, + {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, + {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, + {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, + + {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, + {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, + {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, + {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, + {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, + {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)} + +}; + +// These are the old methods prior to the JSR 166 changes in 1.6.0 +static JNINativeMethod methods_15[] = { + + {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, + {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, + {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, + {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, + + + DECLARE_GETSETOOP(Boolean, Z), + DECLARE_GETSETOOP(Byte, B), + DECLARE_GETSETOOP(Short, S), + DECLARE_GETSETOOP(Char, C), + DECLARE_GETSETOOP(Int, I), + DECLARE_GETSETOOP(Long, J), + DECLARE_GETSETOOP(Float, F), + DECLARE_GETSETOOP(Double, D), + + DECLARE_GETSETNATIVE(Byte, B), + DECLARE_GETSETNATIVE(Short, S), + DECLARE_GETSETNATIVE(Char, C), + DECLARE_GETSETNATIVE(Int, I), + DECLARE_GETSETNATIVE(Long, J), + DECLARE_GETSETNATIVE(Float, F), + DECLARE_GETSETNATIVE(Double, D), + + {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, + {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, + + {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, + {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, +// {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, +// {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, + {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, + + {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, + {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, + {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, + {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, + {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, + {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, + {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, + {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, + + {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, + {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, + {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, + {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, + {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, + {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, + {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, + {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, + {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, + {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, + {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} + +}; + +// These are the correct methods, moving forward: +static JNINativeMethod methods[] = { + + {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)}, + {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)}, + {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)}, + {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)}, + + + DECLARE_GETSETOOP(Boolean, Z), + DECLARE_GETSETOOP(Byte, B), + DECLARE_GETSETOOP(Short, S), + DECLARE_GETSETOOP(Char, C), + DECLARE_GETSETOOP(Int, I), + DECLARE_GETSETOOP(Long, J), + DECLARE_GETSETOOP(Float, F), + DECLARE_GETSETOOP(Double, D), + + DECLARE_GETSETNATIVE(Byte, B), + DECLARE_GETSETNATIVE(Short, S), + DECLARE_GETSETNATIVE(Char, C), + DECLARE_GETSETNATIVE(Int, I), + DECLARE_GETSETNATIVE(Long, J), + DECLARE_GETSETNATIVE(Float, F), + DECLARE_GETSETNATIVE(Double, D), + + {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)}, + {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)}, + + {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)}, + {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)}, +// {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, +// {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}, + {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)}, + + {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)}, + {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)}, + {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)}, + {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)}, + {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)}, + {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)}, + {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)}, + {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)}, + + {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)}, + {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)}, + {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)}, + {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)}, + {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)}, + {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)}, + {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}, + {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)}, + {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)}, + {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)}, + {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)}, + {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)}, + {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)}, + {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, + {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} + +// {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)}, + +// {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, +// {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} +// {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, +// {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} + +}; + +JNINativeMethod loadavg_method[] = { + {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)} +}; + +JNINativeMethod prefetch_methods[] = { + {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, + {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}, + {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)}, + {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)} +}; + +JNINativeMethod memcopy_methods[] = { + {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)}, + {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)} +}; + +JNINativeMethod memcopy_methods_15[] = { + {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)}, + {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)} +}; + + +#undef CC +#undef FN_PTR + +#undef ADR +#undef LANG +#undef OBJ +#undef CLS +#undef CTR +#undef FLD +#undef MTH +#undef THR +#undef DC0_Args +#undef DC1_Args + +#undef DECLARE_GETSETOOP +#undef DECLARE_GETSETNATIVE + + +// This one function is exported, used by NativeLookup. +// The Unsafe_xxx functions above are called only from the interpreter. +// The optimizer looks at names and signatures to recognize +// individual functions. + +JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls)) + UnsafeWrapper("JVM_RegisterUnsafeMethods"); + { + ThreadToNativeFromVM ttnfv(thread); + { + env->RegisterNatives(unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod)); + if (env->ExceptionOccurred()) { + if (PrintMiscellaneous && (Verbose || WizardMode)) { + tty->print_cr("Warning: SDK 1.6 Unsafe.loadavg not found."); + } + env->ExceptionClear(); + } + } + { + env->RegisterNatives(unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod)); + if (env->ExceptionOccurred()) { + if (PrintMiscellaneous && (Verbose || WizardMode)) { + tty->print_cr("Warning: SDK 1.6 Unsafe.prefetchRead/Write not found."); + } + env->ExceptionClear(); + } + } + { + env->RegisterNatives(unsafecls, memcopy_methods, sizeof(memcopy_methods)/sizeof(JNINativeMethod)); + if (env->ExceptionOccurred()) { + if (PrintMiscellaneous && (Verbose || WizardMode)) { + tty->print_cr("Warning: SDK 1.7 Unsafe.copyMemory not found."); + } + env->ExceptionClear(); + env->RegisterNatives(unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod)); + if (env->ExceptionOccurred()) { + if (PrintMiscellaneous && (Verbose || WizardMode)) { + tty->print_cr("Warning: SDK 1.5 Unsafe.copyMemory not found."); + } + env->ExceptionClear(); + } + } + } + int status = env->RegisterNatives(unsafecls, methods, sizeof(methods)/sizeof(JNINativeMethod)); + if (env->ExceptionOccurred()) { + if (PrintMiscellaneous && (Verbose || WizardMode)) { + tty->print_cr("Warning: SDK 1.6 version of Unsafe not found."); + } + env->ExceptionClear(); + // %%% For now, be backward compatible with an older class: + status = env->RegisterNatives(unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod)); + } + if (env->ExceptionOccurred()) { + if (PrintMiscellaneous && (Verbose || WizardMode)) { + tty->print_cr("Warning: SDK 1.5 version of Unsafe not found."); + } + env->ExceptionClear(); + // %%% For now, be backward compatible with an older class: + status = env->RegisterNatives(unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod)); + } + if (env->ExceptionOccurred()) { + if (PrintMiscellaneous && (Verbose || WizardMode)) { + tty->print_cr("Warning: SDK 1.4.1 version of Unsafe not found."); + } + env->ExceptionClear(); + // %%% For now, be backward compatible with an older class: + status = env->RegisterNatives(unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod)); + } + guarantee(status == 0, "register unsafe natives"); + } +JVM_END