| /* |
| * 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 |
