author | eosterlund |
Thu, 22 Feb 2018 10:39:42 +0100 | |
changeset 49041 | 44122f767467 |
parent 49036 | bc92debe57e4 |
child 49192 | 6734eeef4283 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#include "precompiled.hpp" |
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#include "jni.h" |
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#include "jvm.h" |
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#include "classfile/classFileStream.hpp" |
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#include "classfile/vmSymbols.hpp" |
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#include "memory/allocation.inline.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "oops/access.inline.hpp" |
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#include "oops/fieldStreams.hpp" |
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#include "oops/objArrayOop.inline.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "oops/typeArrayOop.inline.hpp" |
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#include "prims/unsafe.hpp" |
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#include "runtime/atomic.hpp" |
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#include "runtime/globals.hpp" |
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#include "runtime/interfaceSupport.hpp" |
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#include "runtime/orderAccess.inline.hpp" |
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#include "runtime/reflection.hpp" |
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#include "runtime/thread.hpp" |
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#include "runtime/threadSMR.hpp" |
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#include "runtime/vm_version.hpp" |
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#include "services/threadService.hpp" |
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#include "trace/tracing.hpp" |
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#include "utilities/align.hpp" |
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#include "utilities/copy.hpp" |
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#include "utilities/dtrace.hpp" |
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#include "utilities/macros.hpp" |
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/** |
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* Implementation of the jdk.internal.misc.Unsafe class |
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*/ |
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#define MAX_OBJECT_SIZE \ |
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( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \ |
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+ ((julong)max_jint * sizeof(double)) ) |
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#define UNSAFE_ENTRY(result_type, header) \ |
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JVM_ENTRY(static result_type, header) |
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#define UNSAFE_LEAF(result_type, header) \ |
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JVM_LEAF(static result_type, header) |
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#define UNSAFE_END JVM_END |
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static inline void* addr_from_java(jlong addr) { |
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// This assert fails in a variety of ways on 32-bit systems. |
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// It is impossible to predict whether native code that converts |
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// pointers to longs will sign-extend or zero-extend the addresses. |
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//assert(addr == (uintptr_t)addr, "must not be odd high bits"); |
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return (void*)(uintptr_t)addr; |
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} |
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static inline jlong addr_to_java(void* p) { |
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assert(p == (void*)(uintptr_t)p, "must not be odd high bits"); |
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return (uintptr_t)p; |
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} |
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// Note: The VM's obj_field and related accessors use byte-scaled |
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// ("unscaled") offsets, just as the unsafe methods do. |
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// However, the method Unsafe.fieldOffset explicitly declines to |
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// guarantee this. The field offset values manipulated by the Java user |
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// through the Unsafe API are opaque cookies that just happen to be byte |
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// offsets. We represent this state of affairs by passing the cookies |
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// through conversion functions when going between the VM and the Unsafe API. |
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// The conversion functions just happen to be no-ops at present. |
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static inline jlong field_offset_to_byte_offset(jlong field_offset) { |
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return field_offset; |
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} |
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static inline jlong field_offset_from_byte_offset(jlong byte_offset) { |
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return byte_offset; |
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} |
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static inline void assert_field_offset_sane(oop p, jlong field_offset) { |
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#ifdef ASSERT |
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jlong byte_offset = field_offset_to_byte_offset(field_offset); |
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if (p != NULL) { |
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assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset"); |
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if (byte_offset == (jint)byte_offset) { |
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void* ptr_plus_disp = (address)p + byte_offset; |
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assert(p->field_addr_raw((jint)byte_offset) == ptr_plus_disp, |
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"raw [ptr+disp] must be consistent with oop::field_addr_raw"); |
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} |
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jlong p_size = HeapWordSize * (jlong)(p->size()); |
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assert(byte_offset < p_size, "Unsafe access: offset " INT64_FORMAT " > object's size " INT64_FORMAT, (int64_t)byte_offset, (int64_t)p_size); |
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} |
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#endif |
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} |
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static inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { |
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assert_field_offset_sane(p, field_offset); |
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jlong byte_offset = field_offset_to_byte_offset(field_offset); |
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if (sizeof(char*) == sizeof(jint)) { // (this constant folds!) |
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return (address)p + (jint) byte_offset; |
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} else { |
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return (address)p + byte_offset; |
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} |
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} |
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// Externally callable versions: |
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// (Use these in compiler intrinsics which emulate unsafe primitives.) |
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jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) { |
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return field_offset; |
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} |
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jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) { |
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return byte_offset; |
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} |
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///// Data read/writes on the Java heap and in native (off-heap) memory |
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/** |
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* Helper class for accessing memory. |
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* |
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* Normalizes values and wraps accesses in |
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* JavaThread::doing_unsafe_access() if needed. |
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*/ |
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template <typename T> |
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class MemoryAccess : StackObj { |
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JavaThread* _thread; |
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oop _obj; |
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ptrdiff_t _offset; |
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// Resolves and returns the address of the memory access. |
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// This raw memory access may fault, so we make sure it happens within the |
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// guarded scope by making the access volatile at least. Since the store |
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// of Thread::set_doing_unsafe_access() is also volatile, these accesses |
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// can not be reordered by the compiler. Therefore, if the access triggers |
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// a fault, we will know that Thread::doing_unsafe_access() returns true. |
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volatile T* addr() { |
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void* addr = index_oop_from_field_offset_long(_obj, _offset); |
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return static_cast<volatile T*>(addr); |
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} |
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template <typename U> |
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U normalize_for_write(U x) { |
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return x; |
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} |
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jboolean normalize_for_write(jboolean x) { |
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return x & 1; |
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} |
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template <typename U> |
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U normalize_for_read(U x) { |
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return x; |
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} |
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jboolean normalize_for_read(jboolean x) { |
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return x != 0; |
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} |
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/** |
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* Helper class to wrap memory accesses in JavaThread::doing_unsafe_access() |
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*/ |
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class GuardUnsafeAccess { |
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JavaThread* _thread; |
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public: |
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GuardUnsafeAccess(JavaThread* thread) : _thread(thread) { |
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// native/off-heap access which may raise SIGBUS if accessing |
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// memory mapped file data in a region of the file which has |
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// been truncated and is now invalid |
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_thread->set_doing_unsafe_access(true); |
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} |
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~GuardUnsafeAccess() { |
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_thread->set_doing_unsafe_access(false); |
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} |
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}; |
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public: |
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MemoryAccess(JavaThread* thread, jobject obj, jlong offset) |
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: _thread(thread), _obj(JNIHandles::resolve(obj)), _offset((ptrdiff_t)offset) { |
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assert_field_offset_sane(_obj, offset); |
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} |
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T get() { |
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if (oopDesc::is_null(_obj)) { |
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GuardUnsafeAccess guard(_thread); |
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T ret = RawAccess<>::load(addr()); |
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return normalize_for_read(ret); |
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} else { |
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T ret = HeapAccess<>::load_at(_obj, _offset); |
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return normalize_for_read(ret); |
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} |
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} |
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void put(T x) { |
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if (oopDesc::is_null(_obj)) { |
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GuardUnsafeAccess guard(_thread); |
48169 | 224 |
RawAccess<>::store(addr(), normalize_for_write(x)); |
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} else { |
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HeapAccess<>::store_at(_obj, _offset, normalize_for_write(x)); |
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} |
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} |
1 | 229 |
|
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230 |
|
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231 |
T get_volatile() { |
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232 |
if (oopDesc::is_null(_obj)) { |
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GuardUnsafeAccess guard(_thread); |
48169 | 234 |
volatile T ret = RawAccess<MO_SEQ_CST>::load(addr()); |
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return normalize_for_read(ret); |
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236 |
} else { |
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T ret = HeapAccess<MO_SEQ_CST>::load_at(_obj, _offset); |
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return normalize_for_read(ret); |
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239 |
} |
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240 |
} |
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241 |
|
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242 |
void put_volatile(T x) { |
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243 |
if (oopDesc::is_null(_obj)) { |
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GuardUnsafeAccess guard(_thread); |
48169 | 245 |
RawAccess<MO_SEQ_CST>::store(addr(), normalize_for_write(x)); |
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246 |
} else { |
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HeapAccess<MO_SEQ_CST>::store_at(_obj, _offset, normalize_for_write(x)); |
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} |
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} |
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}; |
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251 |
|
25057 | 252 |
// These functions allow a null base pointer with an arbitrary address. |
1 | 253 |
// But if the base pointer is non-null, the offset should make some sense. |
254 |
// That is, it should be in the range [0, MAX_OBJECT_SIZE]. |
|
36551 | 255 |
UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) { |
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oop p = JNIHandles::resolve(obj); |
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assert_field_offset_sane(p, offset); |
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oop v = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_load_at(p, offset); |
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return JNIHandles::make_local(env, v); |
36551 | 260 |
} UNSAFE_END |
261 |
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UNSAFE_ENTRY(void, Unsafe_PutObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) { |
1 | 263 |
oop x = JNIHandles::resolve(x_h); |
264 |
oop p = JNIHandles::resolve(obj); |
|
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assert_field_offset_sane(p, offset); |
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HeapAccess<ON_UNKNOWN_OOP_REF>::oop_store_at(p, offset, x); |
36551 | 267 |
} UNSAFE_END |
1 | 268 |
|
36551 | 269 |
UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) { |
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oop p = JNIHandles::resolve(obj); |
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assert_field_offset_sane(p, offset); |
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oop v = HeapAccess<MO_SEQ_CST | ON_UNKNOWN_OOP_REF>::oop_load_at(p, offset); |
1 | 273 |
return JNIHandles::make_local(env, v); |
36551 | 274 |
} UNSAFE_END |
1 | 275 |
|
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UNSAFE_ENTRY(void, Unsafe_PutObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h)) { |
1 | 277 |
oop x = JNIHandles::resolve(x_h); |
278 |
oop p = JNIHandles::resolve(obj); |
|
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assert_field_offset_sane(p, offset); |
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HeapAccess<MO_SEQ_CST | ON_UNKNOWN_OOP_REF>::oop_store_at(p, offset, x); |
36551 | 281 |
} UNSAFE_END |
282 |
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283 |
UNSAFE_ENTRY(jobject, Unsafe_GetUncompressedObject(JNIEnv *env, jobject unsafe, jlong addr)) { |
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oop v = *(oop*) (address) addr; |
36551 | 285 |
return JNIHandles::make_local(env, v); |
286 |
} UNSAFE_END |
|
287 |
||
288 |
UNSAFE_LEAF(jboolean, Unsafe_isBigEndian0(JNIEnv *env, jobject unsafe)) { |
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#ifdef VM_LITTLE_ENDIAN |
36551 | 290 |
return false; |
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#else |
36551 | 292 |
return true; |
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#endif |
36551 | 294 |
} UNSAFE_END |
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295 |
|
36551 | 296 |
UNSAFE_LEAF(jint, Unsafe_unalignedAccess0(JNIEnv *env, jobject unsafe)) { |
297 |
return UseUnalignedAccesses; |
|
298 |
} UNSAFE_END |
|
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299 |
|
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#define DEFINE_GETSETOOP(java_type, Type) \ |
1 | 301 |
\ |
36551 | 302 |
UNSAFE_ENTRY(java_type, Unsafe_Get##Type(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) { \ |
48169 | 303 |
return MemoryAccess<java_type>(thread, obj, offset).get(); \ |
36551 | 304 |
} UNSAFE_END \ |
1 | 305 |
\ |
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UNSAFE_ENTRY(void, Unsafe_Put##Type(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, java_type x)) { \ |
48169 | 307 |
MemoryAccess<java_type>(thread, obj, offset).put(x); \ |
36551 | 308 |
} UNSAFE_END \ |
1 | 309 |
\ |
310 |
// END DEFINE_GETSETOOP. |
|
311 |
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DEFINE_GETSETOOP(jboolean, Boolean) |
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DEFINE_GETSETOOP(jbyte, Byte) |
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DEFINE_GETSETOOP(jshort, Short); |
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DEFINE_GETSETOOP(jchar, Char); |
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DEFINE_GETSETOOP(jint, Int); |
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DEFINE_GETSETOOP(jlong, Long); |
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DEFINE_GETSETOOP(jfloat, Float); |
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DEFINE_GETSETOOP(jdouble, Double); |
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|
320 |
|
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#undef DEFINE_GETSETOOP |
1 | 322 |
|
36551 | 323 |
#define DEFINE_GETSETOOP_VOLATILE(java_type, Type) \ |
1 | 324 |
\ |
36551 | 325 |
UNSAFE_ENTRY(java_type, Unsafe_Get##Type##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) { \ |
48169 | 326 |
return MemoryAccess<java_type>(thread, obj, offset).get_volatile(); \ |
36551 | 327 |
} UNSAFE_END \ |
1 | 328 |
\ |
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329 |
UNSAFE_ENTRY(void, Unsafe_Put##Type##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, java_type x)) { \ |
48169 | 330 |
MemoryAccess<java_type>(thread, obj, offset).put_volatile(x); \ |
36551 | 331 |
} UNSAFE_END \ |
1 | 332 |
\ |
333 |
// END DEFINE_GETSETOOP_VOLATILE. |
|
334 |
||
335 |
DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) |
|
336 |
DEFINE_GETSETOOP_VOLATILE(jbyte, Byte) |
|
337 |
DEFINE_GETSETOOP_VOLATILE(jshort, Short); |
|
338 |
DEFINE_GETSETOOP_VOLATILE(jchar, Char); |
|
339 |
DEFINE_GETSETOOP_VOLATILE(jint, Int); |
|
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340 |
DEFINE_GETSETOOP_VOLATILE(jlong, Long); |
1 | 341 |
DEFINE_GETSETOOP_VOLATILE(jfloat, Float); |
342 |
DEFINE_GETSETOOP_VOLATILE(jdouble, Double); |
|
343 |
||
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#undef DEFINE_GETSETOOP_VOLATILE |
1 | 345 |
|
36551 | 346 |
UNSAFE_LEAF(void, Unsafe_LoadFence(JNIEnv *env, jobject unsafe)) { |
14832 | 347 |
OrderAccess::acquire(); |
36551 | 348 |
} UNSAFE_END |
14832 | 349 |
|
36551 | 350 |
UNSAFE_LEAF(void, Unsafe_StoreFence(JNIEnv *env, jobject unsafe)) { |
14832 | 351 |
OrderAccess::release(); |
36551 | 352 |
} UNSAFE_END |
14832 | 353 |
|
36551 | 354 |
UNSAFE_LEAF(void, Unsafe_FullFence(JNIEnv *env, jobject unsafe)) { |
14832 | 355 |
OrderAccess::fence(); |
36551 | 356 |
} UNSAFE_END |
14832 | 357 |
|
1 | 358 |
////// Allocation requests |
359 |
||
36551 | 360 |
UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls)) { |
361 |
ThreadToNativeFromVM ttnfv(thread); |
|
362 |
return env->AllocObject(cls); |
|
363 |
} UNSAFE_END |
|
1 | 364 |
|
36551 | 365 |
UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory0(JNIEnv *env, jobject unsafe, jlong size)) { |
1 | 366 |
size_t sz = (size_t)size; |
36551 | 367 |
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sz = align_up(sz, HeapWordSize); |
13195 | 369 |
void* x = os::malloc(sz, mtInternal); |
36551 | 370 |
|
1 | 371 |
return addr_to_java(x); |
36551 | 372 |
} UNSAFE_END |
1 | 373 |
|
36551 | 374 |
UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory0(JNIEnv *env, jobject unsafe, jlong addr, jlong size)) { |
1 | 375 |
void* p = addr_from_java(addr); |
376 |
size_t sz = (size_t)size; |
|
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377 |
sz = align_up(sz, HeapWordSize); |
36551 | 378 |
|
379 |
void* x = os::realloc(p, sz, mtInternal); |
|
380 |
||
1 | 381 |
return addr_to_java(x); |
36551 | 382 |
} UNSAFE_END |
1 | 383 |
|
36551 | 384 |
UNSAFE_ENTRY(void, Unsafe_FreeMemory0(JNIEnv *env, jobject unsafe, jlong addr)) { |
1 | 385 |
void* p = addr_from_java(addr); |
36551 | 386 |
|
1 | 387 |
os::free(p); |
36551 | 388 |
} UNSAFE_END |
1 | 389 |
|
36551 | 390 |
UNSAFE_ENTRY(void, Unsafe_SetMemory0(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value)) { |
1 | 391 |
size_t sz = (size_t)size; |
36551 | 392 |
|
1 | 393 |
oop base = JNIHandles::resolve(obj); |
394 |
void* p = index_oop_from_field_offset_long(base, offset); |
|
36551 | 395 |
|
1 | 396 |
Copy::fill_to_memory_atomic(p, sz, value); |
36551 | 397 |
} UNSAFE_END |
1 | 398 |
|
36551 | 399 |
UNSAFE_ENTRY(void, Unsafe_CopyMemory0(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size)) { |
1 | 400 |
size_t sz = (size_t)size; |
36551 | 401 |
|
1 | 402 |
oop srcp = JNIHandles::resolve(srcObj); |
403 |
oop dstp = JNIHandles::resolve(dstObj); |
|
36551 | 404 |
|
1 | 405 |
void* src = index_oop_from_field_offset_long(srcp, srcOffset); |
406 |
void* dst = index_oop_from_field_offset_long(dstp, dstOffset); |
|
36551 | 407 |
|
1 | 408 |
Copy::conjoint_memory_atomic(src, dst, sz); |
36551 | 409 |
} UNSAFE_END |
1 | 410 |
|
36086 | 411 |
// This function is a leaf since if the source and destination are both in native memory |
412 |
// the copy may potentially be very large, and we don't want to disable GC if we can avoid it. |
|
413 |
// If either source or destination (or both) are on the heap, the function will enter VM using |
|
414 |
// JVM_ENTRY_FROM_LEAF |
|
36551 | 415 |
UNSAFE_LEAF(void, Unsafe_CopySwapMemory0(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size, jlong elemSize)) { |
36086 | 416 |
size_t sz = (size_t)size; |
417 |
size_t esz = (size_t)elemSize; |
|
418 |
||
419 |
if (srcObj == NULL && dstObj == NULL) { |
|
420 |
// Both src & dst are in native memory |
|
421 |
address src = (address)srcOffset; |
|
422 |
address dst = (address)dstOffset; |
|
423 |
||
424 |
Copy::conjoint_swap(src, dst, sz, esz); |
|
425 |
} else { |
|
426 |
// At least one of src/dst are on heap, transition to VM to access raw pointers |
|
427 |
||
428 |
JVM_ENTRY_FROM_LEAF(env, void, Unsafe_CopySwapMemory0) { |
|
429 |
oop srcp = JNIHandles::resolve(srcObj); |
|
430 |
oop dstp = JNIHandles::resolve(dstObj); |
|
431 |
||
432 |
address src = (address)index_oop_from_field_offset_long(srcp, srcOffset); |
|
433 |
address dst = (address)index_oop_from_field_offset_long(dstp, dstOffset); |
|
434 |
||
435 |
Copy::conjoint_swap(src, dst, sz, esz); |
|
436 |
} JVM_END |
|
437 |
} |
|
36551 | 438 |
} UNSAFE_END |
1 | 439 |
|
440 |
////// Random queries |
|
441 |
||
36551 | 442 |
UNSAFE_LEAF(jint, Unsafe_AddressSize0(JNIEnv *env, jobject unsafe)) { |
1 | 443 |
return sizeof(void*); |
36551 | 444 |
} UNSAFE_END |
1 | 445 |
|
36551 | 446 |
UNSAFE_LEAF(jint, Unsafe_PageSize()) { |
1 | 447 |
return os::vm_page_size(); |
36551 | 448 |
} UNSAFE_END |
1 | 449 |
|
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|
450 |
static jlong find_field_offset(jclass clazz, jstring name, TRAPS) { |
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|
451 |
assert(clazz != NULL, "clazz must not be NULL"); |
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|
452 |
assert(name != NULL, "name must not be NULL"); |
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|
453 |
|
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|
454 |
ResourceMark rm(THREAD); |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
455 |
char *utf_name = java_lang_String::as_utf8_string(JNIHandles::resolve_non_null(name)); |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
456 |
|
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
457 |
InstanceKlass* k = InstanceKlass::cast(java_lang_Class::as_Klass(JNIHandles::resolve_non_null(clazz))); |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
458 |
|
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
459 |
jint offset = -1; |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
460 |
for (JavaFieldStream fs(k); !fs.done(); fs.next()) { |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
461 |
Symbol *name = fs.name(); |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
462 |
if (name->equals(utf_name)) { |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
463 |
offset = fs.offset(); |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
464 |
break; |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
465 |
} |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
466 |
} |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
467 |
if (offset < 0) { |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
468 |
THROW_0(vmSymbols::java_lang_InternalError()); |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
469 |
} |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
470 |
return field_offset_from_byte_offset(offset); |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
471 |
} |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
472 |
|
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
473 |
static jlong find_field_offset(jobject field, int must_be_static, TRAPS) { |
36551 | 474 |
assert(field != NULL, "field must not be NULL"); |
1 | 475 |
|
476 |
oop reflected = JNIHandles::resolve_non_null(field); |
|
477 |
oop mirror = java_lang_reflect_Field::clazz(reflected); |
|
36551 | 478 |
Klass* k = java_lang_Class::as_Klass(mirror); |
1 | 479 |
int slot = java_lang_reflect_Field::slot(reflected); |
480 |
int modifiers = java_lang_reflect_Field::modifiers(reflected); |
|
481 |
||
482 |
if (must_be_static >= 0) { |
|
483 |
int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0); |
|
484 |
if (must_be_static != really_is_static) { |
|
485 |
THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
|
486 |
} |
|
487 |
} |
|
488 |
||
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
489 |
int offset = InstanceKlass::cast(k)->field_offset(slot); |
1 | 490 |
return field_offset_from_byte_offset(offset); |
491 |
} |
|
492 |
||
36551 | 493 |
UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset0(JNIEnv *env, jobject unsafe, jobject field)) { |
1 | 494 |
return find_field_offset(field, 0, THREAD); |
36551 | 495 |
} UNSAFE_END |
1 | 496 |
|
46568
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
497 |
UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset1(JNIEnv *env, jobject unsafe, jclass c, jstring name)) { |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
498 |
return find_field_offset(c, name, THREAD); |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
499 |
} UNSAFE_END |
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
500 |
|
36551 | 501 |
UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset0(JNIEnv *env, jobject unsafe, jobject field)) { |
1 | 502 |
return find_field_offset(field, 1, THREAD); |
36551 | 503 |
} UNSAFE_END |
1 | 504 |
|
36551 | 505 |
UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBase0(JNIEnv *env, jobject unsafe, jobject field)) { |
506 |
assert(field != NULL, "field must not be NULL"); |
|
507 |
||
1 | 508 |
// Note: In this VM implementation, a field address is always a short |
509 |
// offset from the base of a a klass metaobject. Thus, the full dynamic |
|
510 |
// range of the return type is never used. However, some implementations |
|
511 |
// might put the static field inside an array shared by many classes, |
|
512 |
// or even at a fixed address, in which case the address could be quite |
|
513 |
// large. In that last case, this function would return NULL, since |
|
514 |
// the address would operate alone, without any base pointer. |
|
515 |
||
516 |
oop reflected = JNIHandles::resolve_non_null(field); |
|
517 |
oop mirror = java_lang_reflect_Field::clazz(reflected); |
|
518 |
int modifiers = java_lang_reflect_Field::modifiers(reflected); |
|
519 |
||
520 |
if ((modifiers & JVM_ACC_STATIC) == 0) { |
|
521 |
THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
|
522 |
} |
|
523 |
||
8725
8c1e3dd5fe1b
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
8490
diff
changeset
|
524 |
return JNIHandles::make_local(env, mirror); |
36551 | 525 |
} UNSAFE_END |
1 | 526 |
|
36551 | 527 |
UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized0(JNIEnv *env, jobject unsafe, jobject clazz)) { |
528 |
assert(clazz != NULL, "clazz must not be NULL"); |
|
529 |
||
1 | 530 |
oop mirror = JNIHandles::resolve_non_null(clazz); |
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13295
diff
changeset
|
531 |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
532 |
Klass* klass = java_lang_Class::as_Klass(mirror); |
14488 | 533 |
if (klass != NULL && klass->should_be_initialized()) { |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
534 |
InstanceKlass* k = InstanceKlass::cast(klass); |
1 | 535 |
k->initialize(CHECK); |
536 |
} |
|
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13295
diff
changeset
|
537 |
} |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13295
diff
changeset
|
538 |
UNSAFE_END |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13295
diff
changeset
|
539 |
|
36551 | 540 |
UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized0(JNIEnv *env, jobject unsafe, jobject clazz)) { |
541 |
assert(clazz != NULL, "clazz must not be NULL"); |
|
542 |
||
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13295
diff
changeset
|
543 |
oop mirror = JNIHandles::resolve_non_null(clazz); |
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
13391
diff
changeset
|
544 |
Klass* klass = java_lang_Class::as_Klass(mirror); |
36551 | 545 |
|
14488 | 546 |
if (klass != NULL && klass->should_be_initialized()) { |
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13295
diff
changeset
|
547 |
return true; |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13295
diff
changeset
|
548 |
} |
36551 | 549 |
|
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13295
diff
changeset
|
550 |
return false; |
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13295
diff
changeset
|
551 |
} |
1 | 552 |
UNSAFE_END |
553 |
||
36551 | 554 |
static void getBaseAndScale(int& base, int& scale, jclass clazz, TRAPS) { |
555 |
assert(clazz != NULL, "clazz must not be NULL"); |
|
556 |
||
557 |
oop mirror = JNIHandles::resolve_non_null(clazz); |
|
558 |
Klass* k = java_lang_Class::as_Klass(mirror); |
|
559 |
||
33611
9abd65805e19
8139203: Consistent naming for klass type predicates
coleenp
parents:
33589
diff
changeset
|
560 |
if (k == NULL || !k->is_array_klass()) { |
1 | 561 |
THROW(vmSymbols::java_lang_InvalidClassException()); |
33611
9abd65805e19
8139203: Consistent naming for klass type predicates
coleenp
parents:
33589
diff
changeset
|
562 |
} else if (k->is_objArray_klass()) { |
1 | 563 |
base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); |
360
21d113ecbf6a
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
1
diff
changeset
|
564 |
scale = heapOopSize; |
33611
9abd65805e19
8139203: Consistent naming for klass type predicates
coleenp
parents:
33589
diff
changeset
|
565 |
} else if (k->is_typeArray_klass()) { |
13952
e3cf184080bc
8000213: NPG: Should have renamed arrayKlass and typeArrayKlass
coleenp
parents:
13728
diff
changeset
|
566 |
TypeArrayKlass* tak = TypeArrayKlass::cast(k); |
1 | 567 |
base = tak->array_header_in_bytes(); |
568 |
assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok"); |
|
569 |
scale = (1 << tak->log2_element_size()); |
|
570 |
} else { |
|
571 |
ShouldNotReachHere(); |
|
572 |
} |
|
573 |
} |
|
574 |
||
36551 | 575 |
UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset0(JNIEnv *env, jobject unsafe, jclass clazz)) { |
33589
7cbd1b2c139b
8139040: Fix initializations before ShouldNotReachHere() etc. and enable -Wuninitialized on linux.
goetz
parents:
33148
diff
changeset
|
576 |
int base = 0, scale = 0; |
36551 | 577 |
getBaseAndScale(base, scale, clazz, CHECK_0); |
578 |
||
1 | 579 |
return field_offset_from_byte_offset(base); |
36551 | 580 |
} UNSAFE_END |
1 | 581 |
|
582 |
||
36551 | 583 |
UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale0(JNIEnv *env, jobject unsafe, jclass clazz)) { |
33589
7cbd1b2c139b
8139040: Fix initializations before ShouldNotReachHere() etc. and enable -Wuninitialized on linux.
goetz
parents:
33148
diff
changeset
|
584 |
int base = 0, scale = 0; |
36551 | 585 |
getBaseAndScale(base, scale, clazz, CHECK_0); |
586 |
||
1 | 587 |
// This VM packs both fields and array elements down to the byte. |
588 |
// But watch out: If this changes, so that array references for |
|
589 |
// a given primitive type (say, T_BOOLEAN) use different memory units |
|
590 |
// than fields, this method MUST return zero for such arrays. |
|
591 |
// For example, the VM used to store sub-word sized fields in full |
|
592 |
// words in the object layout, so that accessors like getByte(Object,int) |
|
593 |
// did not really do what one might expect for arrays. Therefore, |
|
594 |
// this function used to report a zero scale factor, so that the user |
|
595 |
// would know not to attempt to access sub-word array elements. |
|
596 |
// // Code for unpacked fields: |
|
597 |
// if (scale < wordSize) return 0; |
|
598 |
||
599 |
// The following allows for a pretty general fieldOffset cookie scheme, |
|
600 |
// but requires it to be linear in byte offset. |
|
601 |
return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0); |
|
36551 | 602 |
} UNSAFE_END |
1 | 603 |
|
604 |
||
605 |
static inline void throw_new(JNIEnv *env, const char *ename) { |
|
46568
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
606 |
jclass cls = env->FindClass(ename); |
22786
86644d9539c2
8028785: [parfait] warnings from b116 for hotspot.src.share.vm.prims: JNI exception pending
ccheung
parents:
20282
diff
changeset
|
607 |
if (env->ExceptionCheck()) { |
86644d9539c2
8028785: [parfait] warnings from b116 for hotspot.src.share.vm.prims: JNI exception pending
ccheung
parents:
20282
diff
changeset
|
608 |
env->ExceptionClear(); |
46568
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
609 |
tty->print_cr("Unsafe: cannot throw %s because FindClass has failed", ename); |
22786
86644d9539c2
8028785: [parfait] warnings from b116 for hotspot.src.share.vm.prims: JNI exception pending
ccheung
parents:
20282
diff
changeset
|
610 |
return; |
86644d9539c2
8028785: [parfait] warnings from b116 for hotspot.src.share.vm.prims: JNI exception pending
ccheung
parents:
20282
diff
changeset
|
611 |
} |
36551 | 612 |
|
613 |
env->ThrowNew(cls, NULL); |
|
1 | 614 |
} |
615 |
||
16617
6235d2c7549f
7198429: need checked categorization of caller-sensitive methods in the JDK
twisti
parents:
15482
diff
changeset
|
616 |
static jclass Unsafe_DefineClass_impl(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) { |
36551 | 617 |
// Code lifted from JDK 1.3 ClassLoader.c |
618 |
||
619 |
jbyte *body; |
|
620 |
char *utfName = NULL; |
|
621 |
jclass result = 0; |
|
622 |
char buf[128]; |
|
1 | 623 |
|
36551 | 624 |
assert(data != NULL, "Class bytes must not be NULL"); |
625 |
assert(length >= 0, "length must not be negative: %d", length); |
|
1 | 626 |
|
36551 | 627 |
if (UsePerfData) { |
628 |
ClassLoader::unsafe_defineClassCallCounter()->inc(); |
|
629 |
} |
|
1 | 630 |
|
36551 | 631 |
body = NEW_C_HEAP_ARRAY(jbyte, length, mtInternal); |
632 |
if (body == NULL) { |
|
46568
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
633 |
throw_new(env, "java/lang/OutOfMemoryError"); |
36551 | 634 |
return 0; |
635 |
} |
|
636 |
||
637 |
env->GetByteArrayRegion(data, offset, length, body); |
|
638 |
if (env->ExceptionOccurred()) { |
|
639 |
goto free_body; |
|
640 |
} |
|
1 | 641 |
|
36551 | 642 |
if (name != NULL) { |
643 |
uint len = env->GetStringUTFLength(name); |
|
644 |
int unicode_len = env->GetStringLength(name); |
|
1 | 645 |
|
36551 | 646 |
if (len >= sizeof(buf)) { |
647 |
utfName = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); |
|
648 |
if (utfName == NULL) { |
|
46568
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
649 |
throw_new(env, "java/lang/OutOfMemoryError"); |
36551 | 650 |
goto free_body; |
651 |
} |
|
652 |
} else { |
|
653 |
utfName = buf; |
|
1 | 654 |
} |
655 |
||
36551 | 656 |
env->GetStringUTFRegion(name, 0, unicode_len, utfName); |
1 | 657 |
|
36551 | 658 |
for (uint i = 0; i < len; i++) { |
659 |
if (utfName[i] == '.') utfName[i] = '/'; |
|
1 | 660 |
} |
36551 | 661 |
} |
1 | 662 |
|
36551 | 663 |
result = JVM_DefineClass(env, utfName, loader, body, length, pd); |
1 | 664 |
|
36551 | 665 |
if (utfName && utfName != buf) { |
666 |
FREE_C_HEAP_ARRAY(char, utfName); |
|
667 |
} |
|
1 | 668 |
|
669 |
free_body: |
|
36551 | 670 |
FREE_C_HEAP_ARRAY(jbyte, body); |
671 |
return result; |
|
1 | 672 |
} |
673 |
||
674 |
||
36551 | 675 |
UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd)) { |
676 |
ThreadToNativeFromVM ttnfv(thread); |
|
677 |
||
678 |
return Unsafe_DefineClass_impl(env, name, data, offset, length, loader, pd); |
|
679 |
} UNSAFE_END |
|
16617
6235d2c7549f
7198429: need checked categorization of caller-sensitive methods in the JDK
twisti
parents:
15482
diff
changeset
|
680 |
|
6235d2c7549f
7198429: need checked categorization of caller-sensitive methods in the JDK
twisti
parents:
15482
diff
changeset
|
681 |
|
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
682 |
// define a class but do not make it known to the class loader or system dictionary |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
683 |
// - host_class: supplies context for linkage, access control, protection domain, and class loader |
40923
10fe1c28b9f6
8058575: IllegalAccessError trying to access package-private class from VM anonymous class
hseigel
parents:
40918
diff
changeset
|
684 |
// if host_class is itself anonymous then it is replaced with its host class. |
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
685 |
// - data: bytes of a class file, a raw memory address (length gives the number of bytes) |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
686 |
// - cp_patches: where non-null entries exist, they replace corresponding CP entries in data |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
687 |
|
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
688 |
// When you load an anonymous class U, it works as if you changed its name just before loading, |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
689 |
// to a name that you will never use again. Since the name is lost, no other class can directly |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
690 |
// link to any member of U. Just after U is loaded, the only way to use it is reflectively, |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
691 |
// through java.lang.Class methods like Class.newInstance. |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
692 |
|
40923
10fe1c28b9f6
8058575: IllegalAccessError trying to access package-private class from VM anonymous class
hseigel
parents:
40918
diff
changeset
|
693 |
// The package of an anonymous class must either match its host's class's package or be in the |
10fe1c28b9f6
8058575: IllegalAccessError trying to access package-private class from VM anonymous class
hseigel
parents:
40918
diff
changeset
|
694 |
// unnamed package. If it is in the unnamed package then it will be put in its host class's |
10fe1c28b9f6
8058575: IllegalAccessError trying to access package-private class from VM anonymous class
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|
695 |
// package. |
10fe1c28b9f6
8058575: IllegalAccessError trying to access package-private class from VM anonymous class
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40918
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changeset
|
696 |
// |
10fe1c28b9f6
8058575: IllegalAccessError trying to access package-private class from VM anonymous class
hseigel
parents:
40918
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changeset
|
697 |
|
1550
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jrose
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changeset
|
698 |
// Access checks for linkage sites within U continue to follow the same rules as for named classes. |
be2fc37a817f
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changeset
|
699 |
// An anonymous class also has special privileges to access any member of its host class. |
be2fc37a817f
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jrose
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changeset
|
700 |
// This is the main reason why this loading operation is unsafe. The purpose of this is to |
be2fc37a817f
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jrose
parents:
1388
diff
changeset
|
701 |
// allow language implementations to simulate "open classes"; a host class in effect gets |
be2fc37a817f
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jrose
parents:
1388
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changeset
|
702 |
// new code when an anonymous class is loaded alongside it. A less convenient but more |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
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changeset
|
703 |
// standard way to do this is with reflection, which can also be set to ignore access |
be2fc37a817f
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jrose
parents:
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changeset
|
704 |
// restrictions. |
be2fc37a817f
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jrose
parents:
1388
diff
changeset
|
705 |
|
be2fc37a817f
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jrose
parents:
1388
diff
changeset
|
706 |
// Access into an anonymous class is possible only through reflection. Therefore, there |
be2fc37a817f
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jrose
parents:
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changeset
|
707 |
// are no special access rules for calling into an anonymous class. The relaxed access |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
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diff
changeset
|
708 |
// rule for the host class is applied in the opposite direction: A host class reflectively |
be2fc37a817f
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jrose
parents:
1388
diff
changeset
|
709 |
// access one of its anonymous classes. |
be2fc37a817f
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jrose
parents:
1388
diff
changeset
|
710 |
|
be2fc37a817f
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jrose
parents:
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diff
changeset
|
711 |
// If you load the same bytecodes twice, you get two different classes. You can reload |
be2fc37a817f
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jrose
parents:
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changeset
|
712 |
// the same bytecodes with or without varying CP patches. |
be2fc37a817f
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parents:
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changeset
|
713 |
|
be2fc37a817f
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jrose
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diff
changeset
|
714 |
// By using the CP patching array, you can have a new anonymous class U2 refer to an older one U1. |
be2fc37a817f
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jrose
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changeset
|
715 |
// The bytecodes for U2 should refer to U1 by a symbolic name (doesn't matter what the name is). |
be2fc37a817f
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jrose
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changeset
|
716 |
// The CONSTANT_Class entry for that name can be patched to refer directly to U1. |
be2fc37a817f
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jrose
parents:
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changeset
|
717 |
|
be2fc37a817f
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jrose
parents:
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changeset
|
718 |
// This allows, for example, U2 to use U1 as a superclass or super-interface, or as |
be2fc37a817f
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jrose
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changeset
|
719 |
// an outer class (so that U2 is an anonymous inner class of anonymous U1). |
be2fc37a817f
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changeset
|
720 |
// It is not possible for a named class, or an older anonymous class, to refer by |
be2fc37a817f
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jrose
parents:
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changeset
|
721 |
// name (via its CP) to a newer anonymous class. |
be2fc37a817f
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jrose
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changeset
|
722 |
|
be2fc37a817f
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jrose
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changeset
|
723 |
// CP patching may also be used to modify (i.e., hack) the names of methods, classes, |
be2fc37a817f
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parents:
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changeset
|
724 |
// or type descriptors used in the loaded anonymous class. |
be2fc37a817f
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jrose
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changeset
|
725 |
|
be2fc37a817f
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jrose
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diff
changeset
|
726 |
// Finally, CP patching may be used to introduce "live" objects into the constant pool, |
be2fc37a817f
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jrose
parents:
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changeset
|
727 |
// instead of "dead" strings. A compiled statement like println((Object)"hello") can |
be2fc37a817f
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jrose
parents:
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changeset
|
728 |
// be changed to println(greeting), where greeting is an arbitrary object created before |
be2fc37a817f
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jrose
parents:
1388
diff
changeset
|
729 |
// the anonymous class is loaded. This is useful in dynamic languages, in which |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
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changeset
|
730 |
// various kinds of metaobjects must be introduced as constants into bytecode. |
be2fc37a817f
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jrose
parents:
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changeset
|
731 |
// Note the cast (Object), which tells the verifier to expect an arbitrary object, |
be2fc37a817f
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jrose
parents:
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changeset
|
732 |
// not just a literal string. For such ldc instructions, the verifier uses the |
be2fc37a817f
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jrose
parents:
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changeset
|
733 |
// type Object instead of String, if the loaded constant is not in fact a String. |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
734 |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
41181
diff
changeset
|
735 |
static InstanceKlass* |
1550
be2fc37a817f
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jrose
parents:
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changeset
|
736 |
Unsafe_DefineAnonymousClass_impl(JNIEnv *env, |
be2fc37a817f
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jrose
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changeset
|
737 |
jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, |
36551 | 738 |
u1** temp_alloc, |
1550
be2fc37a817f
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jrose
parents:
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changeset
|
739 |
TRAPS) { |
36551 | 740 |
assert(host_class != NULL, "host_class must not be NULL"); |
741 |
assert(data != NULL, "data must not be NULL"); |
|
1550
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changeset
|
742 |
|
be2fc37a817f
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jrose
parents:
1388
diff
changeset
|
743 |
if (UsePerfData) { |
be2fc37a817f
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jrose
parents:
1388
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changeset
|
744 |
ClassLoader::unsafe_defineClassCallCounter()->inc(); |
be2fc37a817f
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jrose
parents:
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changeset
|
745 |
} |
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jrose
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changeset
|
746 |
|
36551 | 747 |
jint length = typeArrayOop(JNIHandles::resolve_non_null(data))->length(); |
748 |
assert(length >= 0, "class_bytes_length must not be negative: %d", length); |
|
1550
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changeset
|
749 |
|
36551 | 750 |
int class_bytes_length = (int) length; |
751 |
||
752 |
u1* class_bytes = NEW_C_HEAP_ARRAY(u1, length, mtInternal); |
|
753 |
if (class_bytes == NULL) { |
|
1550
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changeset
|
754 |
THROW_0(vmSymbols::java_lang_OutOfMemoryError()); |
be2fc37a817f
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jrose
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changeset
|
755 |
} |
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jrose
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diff
changeset
|
756 |
|
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jrose
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changeset
|
757 |
// caller responsible to free it: |
36551 | 758 |
*temp_alloc = class_bytes; |
1550
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jrose
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changeset
|
759 |
|
36551 | 760 |
jbyte* array_base = typeArrayOop(JNIHandles::resolve_non_null(data))->byte_at_addr(0); |
761 |
Copy::conjoint_jbytes(array_base, class_bytes, length); |
|
1550
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jrose
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changeset
|
762 |
|
be2fc37a817f
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jrose
parents:
1388
diff
changeset
|
763 |
objArrayHandle cp_patches_h; |
be2fc37a817f
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jrose
parents:
1388
diff
changeset
|
764 |
if (cp_patches_jh != NULL) { |
be2fc37a817f
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jrose
parents:
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diff
changeset
|
765 |
oop p = JNIHandles::resolve_non_null(cp_patches_jh); |
36551 | 766 |
assert(p->is_objArray(), "cp_patches must be an object[]"); |
1550
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changeset
|
767 |
cp_patches_h = objArrayHandle(THREAD, (objArrayOop)p); |
be2fc37a817f
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jrose
parents:
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changeset
|
768 |
} |
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jrose
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changeset
|
769 |
|
34666 | 770 |
const Klass* host_klass = java_lang_Class::as_Klass(JNIHandles::resolve_non_null(host_class)); |
40385
a7011a835634
8030221: Checking for anonymous class should check for NULL as well as potential nesting
hseigel
parents:
39260
diff
changeset
|
771 |
|
a7011a835634
8030221: Checking for anonymous class should check for NULL as well as potential nesting
hseigel
parents:
39260
diff
changeset
|
772 |
// Make sure it's the real host class, not another anonymous class. |
a7011a835634
8030221: Checking for anonymous class should check for NULL as well as potential nesting
hseigel
parents:
39260
diff
changeset
|
773 |
while (host_klass != NULL && host_klass->is_instance_klass() && |
a7011a835634
8030221: Checking for anonymous class should check for NULL as well as potential nesting
hseigel
parents:
39260
diff
changeset
|
774 |
InstanceKlass::cast(host_klass)->is_anonymous()) { |
a7011a835634
8030221: Checking for anonymous class should check for NULL as well as potential nesting
hseigel
parents:
39260
diff
changeset
|
775 |
host_klass = InstanceKlass::cast(host_klass)->host_klass(); |
a7011a835634
8030221: Checking for anonymous class should check for NULL as well as potential nesting
hseigel
parents:
39260
diff
changeset
|
776 |
} |
a7011a835634
8030221: Checking for anonymous class should check for NULL as well as potential nesting
hseigel
parents:
39260
diff
changeset
|
777 |
|
37184
23e0d47c1f3e
8140665: SIGSEGV when a primitive type's class is used as the host class in a call to DefineAnonymousClass call
hseigel
parents:
36551
diff
changeset
|
778 |
// Primitive types have NULL Klass* fields in their java.lang.Class instances. |
23e0d47c1f3e
8140665: SIGSEGV when a primitive type's class is used as the host class in a call to DefineAnonymousClass call
hseigel
parents:
36551
diff
changeset
|
779 |
if (host_klass == NULL) { |
40923
10fe1c28b9f6
8058575: IllegalAccessError trying to access package-private class from VM anonymous class
hseigel
parents:
40918
diff
changeset
|
780 |
THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "Host class is null"); |
37184
23e0d47c1f3e
8140665: SIGSEGV when a primitive type's class is used as the host class in a call to DefineAnonymousClass call
hseigel
parents:
36551
diff
changeset
|
781 |
} |
34666 | 782 |
|
40923
10fe1c28b9f6
8058575: IllegalAccessError trying to access package-private class from VM anonymous class
hseigel
parents:
40918
diff
changeset
|
783 |
assert(host_klass->is_instance_klass(), "Host class must be an instance class"); |
10fe1c28b9f6
8058575: IllegalAccessError trying to access package-private class from VM anonymous class
hseigel
parents:
40918
diff
changeset
|
784 |
|
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
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1388
diff
changeset
|
785 |
const char* host_source = host_klass->external_name(); |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
786 |
Handle host_loader(THREAD, host_klass->class_loader()); |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
787 |
Handle host_domain(THREAD, host_klass->protection_domain()); |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
788 |
|
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
789 |
GrowableArray<Handle>* cp_patches = NULL; |
36551 | 790 |
|
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
791 |
if (cp_patches_h.not_null()) { |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
792 |
int alen = cp_patches_h->length(); |
36551 | 793 |
|
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
794 |
for (int i = alen-1; i >= 0; i--) { |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
795 |
oop p = cp_patches_h->obj_at(i); |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
796 |
if (p != NULL) { |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
797 |
Handle patch(THREAD, p); |
36551 | 798 |
|
799 |
if (cp_patches == NULL) { |
|
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
800 |
cp_patches = new GrowableArray<Handle>(i+1, i+1, Handle()); |
36551 | 801 |
} |
802 |
||
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
803 |
cp_patches->at_put(i, patch); |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
804 |
} |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
805 |
} |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
806 |
} |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
807 |
|
36551 | 808 |
ClassFileStream st(class_bytes, class_bytes_length, host_source, ClassFileStream::verify); |
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
809 |
|
36551 | 810 |
Symbol* no_class_name = NULL; |
811 |
Klass* anonk = SystemDictionary::parse_stream(no_class_name, |
|
812 |
host_loader, |
|
813 |
host_domain, |
|
814 |
&st, |
|
40923
10fe1c28b9f6
8058575: IllegalAccessError trying to access package-private class from VM anonymous class
hseigel
parents:
40918
diff
changeset
|
815 |
InstanceKlass::cast(host_klass), |
36551 | 816 |
cp_patches, |
817 |
CHECK_NULL); |
|
818 |
if (anonk == NULL) { |
|
819 |
return NULL; |
|
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
820 |
} |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
821 |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
41181
diff
changeset
|
822 |
return InstanceKlass::cast(anonk); |
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
823 |
} |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
824 |
|
36551 | 825 |
UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass0(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) { |
826 |
ResourceMark rm(THREAD); |
|
827 |
||
14588
8ec26d2d9339
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
14488
diff
changeset
|
828 |
jobject res_jh = NULL; |
36551 | 829 |
u1* temp_alloc = NULL; |
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
830 |
|
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
41181
diff
changeset
|
831 |
InstanceKlass* anon_klass = Unsafe_DefineAnonymousClass_impl(env, host_class, data, cp_patches_jh, &temp_alloc, THREAD); |
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
41181
diff
changeset
|
832 |
if (anon_klass != NULL) { |
14588
8ec26d2d9339
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
14488
diff
changeset
|
833 |
res_jh = JNIHandles::make_local(env, anon_klass->java_mirror()); |
36551 | 834 |
} |
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
835 |
|
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
836 |
// try/finally clause: |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
837 |
if (temp_alloc != NULL) { |
36551 | 838 |
FREE_C_HEAP_ARRAY(u1, temp_alloc); |
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
839 |
} |
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
840 |
|
14588
8ec26d2d9339
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
14488
diff
changeset
|
841 |
// The anonymous class loader data has been artificially been kept alive to |
8ec26d2d9339
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
14488
diff
changeset
|
842 |
// this point. The mirror and any instances of this class have to keep |
8ec26d2d9339
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
14488
diff
changeset
|
843 |
// it alive afterwards. |
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
41181
diff
changeset
|
844 |
if (anon_klass != NULL) { |
38014
8731fa11f766
8152949: Jigsaw crash when Klass in _fixup_module_field_list is unloaded
lfoltan
parents:
37267
diff
changeset
|
845 |
anon_klass->class_loader_data()->dec_keep_alive(); |
14588
8ec26d2d9339
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
14488
diff
changeset
|
846 |
} |
8ec26d2d9339
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
14488
diff
changeset
|
847 |
|
8ec26d2d9339
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
14488
diff
changeset
|
848 |
// let caller initialize it as needed... |
8ec26d2d9339
8000662: NPG: nashorn ant clean test262 out-of-memory with Java heap
coleenp
parents:
14488
diff
changeset
|
849 |
|
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
850 |
return (jclass) res_jh; |
36551 | 851 |
} UNSAFE_END |
1550
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
852 |
|
be2fc37a817f
6653858: dynamic languages need to be able to load anonymous classes
jrose
parents:
1388
diff
changeset
|
853 |
|
1 | 854 |
|
36551 | 855 |
UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr)) { |
856 |
ThreadToNativeFromVM ttnfv(thread); |
|
857 |
env->Throw(thr); |
|
858 |
} UNSAFE_END |
|
1 | 859 |
|
860 |
// JSR166 ------------------------------------------------------------------ |
|
861 |
||
36551 | 862 |
UNSAFE_ENTRY(jobject, Unsafe_CompareAndExchangeObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) { |
36316
7a83de7aabca
8148146: Integrate new internal Unsafe entry points, and basic intrinsic support for VarHandles
shade
parents:
36086
diff
changeset
|
863 |
oop x = JNIHandles::resolve(x_h); |
7a83de7aabca
8148146: Integrate new internal Unsafe entry points, and basic intrinsic support for VarHandles
shade
parents:
36086
diff
changeset
|
864 |
oop e = JNIHandles::resolve(e_h); |
7a83de7aabca
8148146: Integrate new internal Unsafe entry points, and basic intrinsic support for VarHandles
shade
parents:
36086
diff
changeset
|
865 |
oop p = JNIHandles::resolve(obj); |
47998
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
866 |
assert_field_offset_sane(p, offset); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
867 |
oop res = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_atomic_cmpxchg_at(x, p, (ptrdiff_t)offset, e); |
36316
7a83de7aabca
8148146: Integrate new internal Unsafe entry points, and basic intrinsic support for VarHandles
shade
parents:
36086
diff
changeset
|
868 |
return JNIHandles::make_local(env, res); |
36551 | 869 |
} UNSAFE_END |
36316
7a83de7aabca
8148146: Integrate new internal Unsafe entry points, and basic intrinsic support for VarHandles
shade
parents:
36086
diff
changeset
|
870 |
|
36551 | 871 |
UNSAFE_ENTRY(jint, Unsafe_CompareAndExchangeInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) { |
36316
7a83de7aabca
8148146: Integrate new internal Unsafe entry points, and basic intrinsic support for VarHandles
shade
parents:
36086
diff
changeset
|
872 |
oop p = JNIHandles::resolve(obj); |
47998
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
873 |
if (oopDesc::is_null(p)) { |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
874 |
volatile jint* addr = (volatile jint*)index_oop_from_field_offset_long(p, offset); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
875 |
return RawAccess<>::atomic_cmpxchg(x, addr, e); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
876 |
} else { |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
877 |
assert_field_offset_sane(p, offset); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
878 |
return HeapAccess<>::atomic_cmpxchg_at(x, p, (ptrdiff_t)offset, e); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
879 |
} |
36551 | 880 |
} UNSAFE_END |
881 |
||
882 |
UNSAFE_ENTRY(jlong, Unsafe_CompareAndExchangeLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) { |
|
47998
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
883 |
oop p = JNIHandles::resolve(obj); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
884 |
if (oopDesc::is_null(p)) { |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
885 |
volatile jlong* addr = (volatile jlong*)index_oop_from_field_offset_long(p, offset); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
886 |
return RawAccess<>::atomic_cmpxchg(x, addr, e); |
36551 | 887 |
} else { |
47998
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
888 |
assert_field_offset_sane(p, offset); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
889 |
return HeapAccess<>::atomic_cmpxchg_at(x, p, (ptrdiff_t)offset, e); |
36316
7a83de7aabca
8148146: Integrate new internal Unsafe entry points, and basic intrinsic support for VarHandles
shade
parents:
36086
diff
changeset
|
890 |
} |
36551 | 891 |
} UNSAFE_END |
36316
7a83de7aabca
8148146: Integrate new internal Unsafe entry points, and basic intrinsic support for VarHandles
shade
parents:
36086
diff
changeset
|
892 |
|
45514
0fc9cc73ce45
8181292: Backport Rename internal Unsafe.compare methods from 10 to 9
psandoz
parents:
41181
diff
changeset
|
893 |
UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h)) { |
1 | 894 |
oop x = JNIHandles::resolve(x_h); |
895 |
oop e = JNIHandles::resolve(e_h); |
|
896 |
oop p = JNIHandles::resolve(obj); |
|
47998
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
897 |
assert_field_offset_sane(p, offset); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
898 |
oop ret = HeapAccess<ON_UNKNOWN_OOP_REF>::oop_atomic_cmpxchg_at(x, p, (ptrdiff_t)offset, e); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
899 |
return ret == e; |
36551 | 900 |
} UNSAFE_END |
901 |
||
45514
0fc9cc73ce45
8181292: Backport Rename internal Unsafe.compare methods from 10 to 9
psandoz
parents:
41181
diff
changeset
|
902 |
UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSetInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x)) { |
1 | 903 |
oop p = JNIHandles::resolve(obj); |
47998
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
904 |
if (oopDesc::is_null(p)) { |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
905 |
volatile jint* addr = (volatile jint*)index_oop_from_field_offset_long(p, offset); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
906 |
return RawAccess<>::atomic_cmpxchg(x, addr, e) == e; |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
907 |
} else { |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
908 |
assert_field_offset_sane(p, offset); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
909 |
return HeapAccess<>::atomic_cmpxchg_at(x, p, (ptrdiff_t)offset, e) == e; |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
910 |
} |
36551 | 911 |
} UNSAFE_END |
1 | 912 |
|
45514
0fc9cc73ce45
8181292: Backport Rename internal Unsafe.compare methods from 10 to 9
psandoz
parents:
41181
diff
changeset
|
913 |
UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSetLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x)) { |
47998
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
914 |
oop p = JNIHandles::resolve(obj); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
915 |
if (oopDesc::is_null(p)) { |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
916 |
volatile jlong* addr = (volatile jlong*)index_oop_from_field_offset_long(p, offset); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
917 |
return RawAccess<>::atomic_cmpxchg(x, addr, e) == e; |
36551 | 918 |
} else { |
47998
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
919 |
assert_field_offset_sane(p, offset); |
fb0275c320a0
8189871: Refactor GC barriers to use declarative semantics
eosterlund
parents:
47765
diff
changeset
|
920 |
return HeapAccess<>::atomic_cmpxchg_at(x, p, (ptrdiff_t)offset, e) == e; |
1 | 921 |
} |
36551 | 922 |
} UNSAFE_END |
1 | 923 |
|
36551 | 924 |
UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time)) { |
18025 | 925 |
EventThreadPark event; |
22796 | 926 |
HOTSPOT_THREAD_PARK_BEGIN((uintptr_t) thread->parker(), (int) isAbsolute, time); |
927 |
||
1 | 928 |
JavaThreadParkedState jtps(thread, time != 0); |
929 |
thread->parker()->park(isAbsolute != 0, time); |
|
22796 | 930 |
|
931 |
HOTSPOT_THREAD_PARK_END((uintptr_t) thread->parker()); |
|
36551 | 932 |
|
18025 | 933 |
if (event.should_commit()) { |
934 |
oop obj = thread->current_park_blocker(); |
|
40664
1ec65b303bb7
8164523: Clean up metadata for event based tracing
egahlin
parents:
40655
diff
changeset
|
935 |
event.set_parkedClass((obj != NULL) ? obj->klass() : NULL); |
18025 | 936 |
event.set_timeout(time); |
20282
7f9cbdf89af2
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
18025
diff
changeset
|
937 |
event.set_address((obj != NULL) ? (TYPE_ADDRESS) cast_from_oop<uintptr_t>(obj) : 0); |
18025 | 938 |
event.commit(); |
939 |
} |
|
36551 | 940 |
} UNSAFE_END |
1 | 941 |
|
36551 | 942 |
UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread)) { |
1 | 943 |
Parker* p = NULL; |
36551 | 944 |
|
1 | 945 |
if (jthread != NULL) { |
48105
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47998
diff
changeset
|
946 |
ThreadsListHandle tlh; |
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47998
diff
changeset
|
947 |
JavaThread* thr = NULL; |
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47998
diff
changeset
|
948 |
oop java_thread = NULL; |
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47998
diff
changeset
|
949 |
(void) tlh.cv_internal_thread_to_JavaThread(jthread, &thr, &java_thread); |
1 | 950 |
if (java_thread != NULL) { |
48105
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47998
diff
changeset
|
951 |
// This is a valid oop. |
1 | 952 |
jlong lp = java_lang_Thread::park_event(java_thread); |
953 |
if (lp != 0) { |
|
954 |
// This cast is OK even though the jlong might have been read |
|
955 |
// non-atomically on 32bit systems, since there, one word will |
|
956 |
// always be zero anyway and the value set is always the same |
|
957 |
p = (Parker*)addr_from_java(lp); |
|
958 |
} else { |
|
48105
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47998
diff
changeset
|
959 |
// Not cached in the java.lang.Thread oop yet (could be an |
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47998
diff
changeset
|
960 |
// older version of library). |
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47998
diff
changeset
|
961 |
if (thr != NULL) { |
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47998
diff
changeset
|
962 |
// The JavaThread is alive. |
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47998
diff
changeset
|
963 |
p = thr->parker(); |
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47998
diff
changeset
|
964 |
if (p != NULL) { |
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47998
diff
changeset
|
965 |
// Cache the Parker in the java.lang.Thread oop for next time. |
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47998
diff
changeset
|
966 |
java_lang_Thread::set_park_event(java_thread, addr_to_java(p)); |
1 | 967 |
} |
968 |
} |
|
969 |
} |
|
970 |
} |
|
48105
8d15b1369c7a
8167108: inconsistent handling of SR_lock can lead to crashes
dcubed
parents:
47998
diff
changeset
|
971 |
} // ThreadsListHandle is destroyed here. |
36551 | 972 |
|
1 | 973 |
if (p != NULL) { |
22796 | 974 |
HOTSPOT_THREAD_UNPARK((uintptr_t) p); |
1 | 975 |
p->unpark(); |
976 |
} |
|
36551 | 977 |
} UNSAFE_END |
1 | 978 |
|
36551 | 979 |
UNSAFE_ENTRY(jint, Unsafe_GetLoadAverage0(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem)) { |
1 | 980 |
const int max_nelem = 3; |
981 |
double la[max_nelem]; |
|
982 |
jint ret; |
|
983 |
||
984 |
typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg)); |
|
985 |
assert(a->is_typeArray(), "must be type array"); |
|
986 |
||
36551 | 987 |
ret = os::loadavg(la, nelem); |
988 |
if (ret == -1) { |
|
1 | 989 |
return -1; |
990 |
} |
|
991 |
||
992 |
// if successful, ret is the number of samples actually retrieved. |
|
993 |
assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value"); |
|
994 |
switch(ret) { |
|
995 |
case 3: a->double_at_put(2, (jdouble)la[2]); // fall through |
|
996 |
case 2: a->double_at_put(1, (jdouble)la[1]); // fall through |
|
997 |
case 1: a->double_at_put(0, (jdouble)la[0]); break; |
|
998 |
} |
|
36551 | 999 |
|
1 | 1000 |
return ret; |
36551 | 1001 |
} UNSAFE_END |
1 | 1002 |
|
1003 |
||
1004 |
/// JVM_RegisterUnsafeMethods |
|
1005 |
||
1006 |
#define ADR "J" |
|
1007 |
||
1008 |
#define LANG "Ljava/lang/" |
|
1009 |
||
31592
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1010 |
#define OBJ LANG "Object;" |
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1011 |
#define CLS LANG "Class;" |
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1012 |
#define FLD LANG "reflect/Field;" |
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1013 |
#define THR LANG "Throwable;" |
1 | 1014 |
|
31592
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1015 |
#define DC_Args LANG "String;[BII" LANG "ClassLoader;" "Ljava/security/ProtectionDomain;" |
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1016 |
#define DAC_Args CLS "[B[" OBJ |
1 | 1017 |
|
1018 |
#define CC (char*) /*cast a literal from (const char*)*/ |
|
1019 |
#define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) |
|
1020 |
||
36551 | 1021 |
#define DECLARE_GETPUTOOP(Type, Desc) \ |
1022 |
{CC "get" #Type, CC "(" OBJ "J)" #Desc, FN_PTR(Unsafe_Get##Type)}, \ |
|
38211
fe30fdab0f62
8150921: Update Unsafe getters/setters to use double-register variants
mikael
parents:
38060
diff
changeset
|
1023 |
{CC "put" #Type, CC "(" OBJ "J" #Desc ")V", FN_PTR(Unsafe_Put##Type)}, \ |
36551 | 1024 |
{CC "get" #Type "Volatile", CC "(" OBJ "J)" #Desc, FN_PTR(Unsafe_Get##Type##Volatile)}, \ |
38211
fe30fdab0f62
8150921: Update Unsafe getters/setters to use double-register variants
mikael
parents:
38060
diff
changeset
|
1025 |
{CC "put" #Type "Volatile", CC "(" OBJ "J" #Desc ")V", FN_PTR(Unsafe_Put##Type##Volatile)} |
1 | 1026 |
|
1027 |
||
35103
d19354bcbfa6
8143628: Fork sun.misc.Unsafe and jdk.internal.misc.Unsafe native method tables
psandoz
parents:
33612
diff
changeset
|
1028 |
static JNINativeMethod jdk_internal_misc_Unsafe_methods[] = { |
31592
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1029 |
{CC "getObject", CC "(" OBJ "J)" OBJ "", FN_PTR(Unsafe_GetObject)}, |
38211
fe30fdab0f62
8150921: Update Unsafe getters/setters to use double-register variants
mikael
parents:
38060
diff
changeset
|
1030 |
{CC "putObject", CC "(" OBJ "J" OBJ ")V", FN_PTR(Unsafe_PutObject)}, |
31592
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1031 |
{CC "getObjectVolatile",CC "(" OBJ "J)" OBJ "", FN_PTR(Unsafe_GetObjectVolatile)}, |
38211
fe30fdab0f62
8150921: Update Unsafe getters/setters to use double-register variants
mikael
parents:
38060
diff
changeset
|
1032 |
{CC "putObjectVolatile",CC "(" OBJ "J" OBJ ")V", FN_PTR(Unsafe_PutObjectVolatile)}, |
1 | 1033 |
|
31592
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1034 |
{CC "getUncompressedObject", CC "(" ADR ")" OBJ, FN_PTR(Unsafe_GetUncompressedObject)}, |
30288
476c276de939
8022853: add ability to load uncompressed object and Klass references in a compressed environment to Unsafe
twisti
parents:
30209
diff
changeset
|
1035 |
|
28951
a29d2048e16a
8068975: Remove deprecated methods on sun.misc.Unsafe and clean up native implementation
psandoz
parents:
28621
diff
changeset
|
1036 |
DECLARE_GETPUTOOP(Boolean, Z), |
a29d2048e16a
8068975: Remove deprecated methods on sun.misc.Unsafe and clean up native implementation
psandoz
parents:
28621
diff
changeset
|
1037 |
DECLARE_GETPUTOOP(Byte, B), |
a29d2048e16a
8068975: Remove deprecated methods on sun.misc.Unsafe and clean up native implementation
psandoz
parents:
28621
diff
changeset
|
1038 |
DECLARE_GETPUTOOP(Short, S), |
a29d2048e16a
8068975: Remove deprecated methods on sun.misc.Unsafe and clean up native implementation
psandoz
parents:
28621
diff
changeset
|
1039 |
DECLARE_GETPUTOOP(Char, C), |
a29d2048e16a
8068975: Remove deprecated methods on sun.misc.Unsafe and clean up native implementation
psandoz
parents:
28621
diff
changeset
|
1040 |
DECLARE_GETPUTOOP(Int, I), |
a29d2048e16a
8068975: Remove deprecated methods on sun.misc.Unsafe and clean up native implementation
psandoz
parents:
28621
diff
changeset
|
1041 |
DECLARE_GETPUTOOP(Long, J), |
a29d2048e16a
8068975: Remove deprecated methods on sun.misc.Unsafe and clean up native implementation
psandoz
parents:
28621
diff
changeset
|
1042 |
DECLARE_GETPUTOOP(Float, F), |
a29d2048e16a
8068975: Remove deprecated methods on sun.misc.Unsafe and clean up native implementation
psandoz
parents:
28621
diff
changeset
|
1043 |
DECLARE_GETPUTOOP(Double, D), |
16617
6235d2c7549f
7198429: need checked categorization of caller-sensitive methods in the JDK
twisti
parents:
15482
diff
changeset
|
1044 |
|
36551 | 1045 |
{CC "allocateMemory0", CC "(J)" ADR, FN_PTR(Unsafe_AllocateMemory0)}, |
1046 |
{CC "reallocateMemory0", CC "(" ADR "J)" ADR, FN_PTR(Unsafe_ReallocateMemory0)}, |
|
1047 |
{CC "freeMemory0", CC "(" ADR ")V", FN_PTR(Unsafe_FreeMemory0)}, |
|
1 | 1048 |
|
36551 | 1049 |
{CC "objectFieldOffset0", CC "(" FLD ")J", FN_PTR(Unsafe_ObjectFieldOffset0)}, |
46568
4a430bd81cc6
8182487: Add Unsafe.objectFieldOffset(Class, String)
redestad
parents:
46458
diff
changeset
|
1050 |
{CC "objectFieldOffset1", CC "(" CLS LANG "String;)J", FN_PTR(Unsafe_ObjectFieldOffset1)}, |
36551 | 1051 |
{CC "staticFieldOffset0", CC "(" FLD ")J", FN_PTR(Unsafe_StaticFieldOffset0)}, |
1052 |
{CC "staticFieldBase0", CC "(" FLD ")" OBJ, FN_PTR(Unsafe_StaticFieldBase0)}, |
|
1053 |
{CC "ensureClassInitialized0", CC "(" CLS ")V", FN_PTR(Unsafe_EnsureClassInitialized0)}, |
|
1054 |
{CC "arrayBaseOffset0", CC "(" CLS ")I", FN_PTR(Unsafe_ArrayBaseOffset0)}, |
|
1055 |
{CC "arrayIndexScale0", CC "(" CLS ")I", FN_PTR(Unsafe_ArrayIndexScale0)}, |
|
1056 |
{CC "addressSize0", CC "()I", FN_PTR(Unsafe_AddressSize0)}, |
|
31592
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1057 |
{CC "pageSize", CC "()I", FN_PTR(Unsafe_PageSize)}, |
1 | 1058 |
|
36551 | 1059 |
{CC "defineClass0", CC "(" DC_Args ")" CLS, FN_PTR(Unsafe_DefineClass0)}, |
31592
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1060 |
{CC "allocateInstance", CC "(" CLS ")" OBJ, FN_PTR(Unsafe_AllocateInstance)}, |
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1061 |
{CC "throwException", CC "(" THR ")V", FN_PTR(Unsafe_ThrowException)}, |
45514
0fc9cc73ce45
8181292: Backport Rename internal Unsafe.compare methods from 10 to 9
psandoz
parents:
41181
diff
changeset
|
1062 |
{CC "compareAndSetObject",CC "(" OBJ "J" OBJ "" OBJ ")Z", FN_PTR(Unsafe_CompareAndSetObject)}, |
0fc9cc73ce45
8181292: Backport Rename internal Unsafe.compare methods from 10 to 9
psandoz
parents:
41181
diff
changeset
|
1063 |
{CC "compareAndSetInt", CC "(" OBJ "J""I""I"")Z", FN_PTR(Unsafe_CompareAndSetInt)}, |
0fc9cc73ce45
8181292: Backport Rename internal Unsafe.compare methods from 10 to 9
psandoz
parents:
41181
diff
changeset
|
1064 |
{CC "compareAndSetLong", CC "(" OBJ "J""J""J"")Z", FN_PTR(Unsafe_CompareAndSetLong)}, |
0fc9cc73ce45
8181292: Backport Rename internal Unsafe.compare methods from 10 to 9
psandoz
parents:
41181
diff
changeset
|
1065 |
{CC "compareAndExchangeObject", CC "(" OBJ "J" OBJ "" OBJ ")" OBJ, FN_PTR(Unsafe_CompareAndExchangeObject)}, |
0fc9cc73ce45
8181292: Backport Rename internal Unsafe.compare methods from 10 to 9
psandoz
parents:
41181
diff
changeset
|
1066 |
{CC "compareAndExchangeInt", CC "(" OBJ "J""I""I"")I", FN_PTR(Unsafe_CompareAndExchangeInt)}, |
0fc9cc73ce45
8181292: Backport Rename internal Unsafe.compare methods from 10 to 9
psandoz
parents:
41181
diff
changeset
|
1067 |
{CC "compareAndExchangeLong", CC "(" OBJ "J""J""J"")J", FN_PTR(Unsafe_CompareAndExchangeLong)}, |
36316
7a83de7aabca
8148146: Integrate new internal Unsafe entry points, and basic intrinsic support for VarHandles
shade
parents:
36086
diff
changeset
|
1068 |
|
31592
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1069 |
{CC "park", CC "(ZJ)V", FN_PTR(Unsafe_Park)}, |
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1070 |
{CC "unpark", CC "(" OBJ ")V", FN_PTR(Unsafe_Unpark)}, |
1 | 1071 |
|
36551 | 1072 |
{CC "getLoadAverage0", CC "([DI)I", FN_PTR(Unsafe_GetLoadAverage0)}, |
1 | 1073 |
|
36551 | 1074 |
{CC "copyMemory0", CC "(" OBJ "J" OBJ "JJ)V", FN_PTR(Unsafe_CopyMemory0)}, |
36086 | 1075 |
{CC "copySwapMemory0", CC "(" OBJ "J" OBJ "JJJ)V", FN_PTR(Unsafe_CopySwapMemory0)}, |
36551 | 1076 |
{CC "setMemory0", CC "(" OBJ "JJB)V", FN_PTR(Unsafe_SetMemory0)}, |
1 | 1077 |
|
36551 | 1078 |
{CC "defineAnonymousClass0", CC "(" DAC_Args ")" CLS, FN_PTR(Unsafe_DefineAnonymousClass0)}, |
1 | 1079 |
|
36551 | 1080 |
{CC "shouldBeInitialized0", CC "(" CLS ")Z", FN_PTR(Unsafe_ShouldBeInitialized0)}, |
13391
30245956af37
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
13295
diff
changeset
|
1081 |
|
31592
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1082 |
{CC "loadFence", CC "()V", FN_PTR(Unsafe_LoadFence)}, |
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1083 |
{CC "storeFence", CC "()V", FN_PTR(Unsafe_StoreFence)}, |
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1084 |
{CC "fullFence", CC "()V", FN_PTR(Unsafe_FullFence)}, |
30209
8ea30dc99369
8026049: (bf) Intrinsify ByteBuffer.put{Int, Double, Float, ...} methods
aph
parents:
29083
diff
changeset
|
1085 |
|
31592
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1086 |
{CC "isBigEndian0", CC "()Z", FN_PTR(Unsafe_isBigEndian0)}, |
43f48e165466
8081202: Hotspot compile warning: "Invalid suffix on literal; C++11 requires a space between literal and identifier"
bpittore
parents:
30764
diff
changeset
|
1087 |
{CC "unalignedAccess0", CC "()Z", FN_PTR(Unsafe_unalignedAccess0)} |
16617
6235d2c7549f
7198429: need checked categorization of caller-sensitive methods in the JDK
twisti
parents:
15482
diff
changeset
|
1088 |
}; |
6235d2c7549f
7198429: need checked categorization of caller-sensitive methods in the JDK
twisti
parents:
15482
diff
changeset
|
1089 |
|
1 | 1090 |
#undef CC |
1091 |
#undef FN_PTR |
|
1092 |
||
1093 |
#undef ADR |
|
1094 |
#undef LANG |
|
1095 |
#undef OBJ |
|
1096 |
#undef CLS |
|
1097 |
#undef FLD |
|
1098 |
#undef THR |
|
16617
6235d2c7549f
7198429: need checked categorization of caller-sensitive methods in the JDK
twisti
parents:
15482
diff
changeset
|
1099 |
#undef DC_Args |
28951
a29d2048e16a
8068975: Remove deprecated methods on sun.misc.Unsafe and clean up native implementation
psandoz
parents:
28621
diff
changeset
|
1100 |
#undef DAC_Args |
1 | 1101 |
|
28951
a29d2048e16a
8068975: Remove deprecated methods on sun.misc.Unsafe and clean up native implementation
psandoz
parents:
28621
diff
changeset
|
1102 |
#undef DECLARE_GETPUTOOP |
16617
6235d2c7549f
7198429: need checked categorization of caller-sensitive methods in the JDK
twisti
parents:
15482
diff
changeset
|
1103 |
|
6235d2c7549f
7198429: need checked categorization of caller-sensitive methods in the JDK
twisti
parents:
15482
diff
changeset
|
1104 |
|
36551 | 1105 |
// This function is exported, used by NativeLookup. |
1 | 1106 |
// The Unsafe_xxx functions above are called only from the interpreter. |
1107 |
// The optimizer looks at names and signatures to recognize |
|
1108 |
// individual functions. |
|
1109 |
||
36551 | 1110 |
JVM_ENTRY(void, JVM_RegisterJDKInternalMiscUnsafeMethods(JNIEnv *env, jclass unsafeclass)) { |
1111 |
ThreadToNativeFromVM ttnfv(thread); |
|
35103
d19354bcbfa6
8143628: Fork sun.misc.Unsafe and jdk.internal.misc.Unsafe native method tables
psandoz
parents:
33612
diff
changeset
|
1112 |
|
36551 | 1113 |
int ok = env->RegisterNatives(unsafeclass, jdk_internal_misc_Unsafe_methods, sizeof(jdk_internal_misc_Unsafe_methods)/sizeof(JNINativeMethod)); |
1114 |
guarantee(ok == 0, "register jdk.internal.misc.Unsafe natives"); |
|
1115 |
} JVM_END |