From c87b7cf9991d9dc26378ea98edff77f86dadd1e9 Mon Sep 17 00:00:00 2001 From: Kumonda221 Date: Mon, 13 Jul 2015 01:10:09 +0800 Subject: [PATCH 1/4] Update FieldAccess.java --- .../reflectasm/FieldAccess.java | 24 ++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/src/com/esotericsoftware/reflectasm/FieldAccess.java b/src/com/esotericsoftware/reflectasm/FieldAccess.java index 075ba9a..87422e2 100644 --- a/src/com/esotericsoftware/reflectasm/FieldAccess.java +++ b/src/com/esotericsoftware/reflectasm/FieldAccess.java @@ -26,6 +26,8 @@ import org.objectweb.asm.Type; public abstract class FieldAccess { + private static final Object theUnsafe; + private String[] fieldNames; private Class[] fieldTypes; @@ -572,5 +574,25 @@ static private MethodVisitor insertThrowExceptionForFieldType (MethodVisitor mv, mv.visitInsn(ATHROW); return mv; } - + + static public FieldAccess getAccessUnsafe(Class type) + { + if(theUnsafe == null) + throw new UnsupportedOperationException(); + + return new FieldAccessUnsafe(type, (sun.misc.Unsafe)theUnsafe); + } + + static { + Object unsafe = null; + try { + Class clazz = Class.forName("sun.misc.Unsafe"); + Field field = clazz.getDeclaredField("theUnsafe"); + field.setAccessible(true); + unsafe = field.get(null); + } catch (Exception e) { + } finally { + theUnsafe = unsafe; + } + } } From 494c1cb9a2949d64a1c2bd32dae38cbe202ef6a6 Mon Sep 17 00:00:00 2001 From: Kumonda221 Date: Mon, 13 Jul 2015 01:12:43 +0800 Subject: [PATCH 2/4] Create FieldAccessUnsafe.java --- .../reflectasm/FieldAccessUnsafe.java | 144 ++++++++++++++++++ 1 file changed, 144 insertions(+) create mode 100644 src/com/esotericsoftware/reflectasm/FieldAccessUnsafe.java diff --git a/src/com/esotericsoftware/reflectasm/FieldAccessUnsafe.java b/src/com/esotericsoftware/reflectasm/FieldAccessUnsafe.java new file mode 100644 index 0000000..d1b58ab --- /dev/null +++ b/src/com/esotericsoftware/reflectasm/FieldAccessUnsafe.java @@ -0,0 +1,144 @@ +package com.esotericsoftware.reflectasm; + +import sun.misc.Unsafe; + +import java.lang.reflect.*; + +@SuppressWarnings("restriction") +class FieldAccessUnsafe extends FieldAccess { + FieldAccessUnsafe(Class clazz, Unsafe unsafe) + { + this.unsafe = unsafe; + + Field[] fields = clazz.getFields(); + + super.fieldNames = new String[fields.length]; + super.fieldTypes = new Class[fields.length]; + this.addresses = new long[fields.length]; + + for(int i = 0; i < fields.length; i++) + { + super.fieldNames[i] = fields[i].getName(); + super.fieldTypes[i] = fields[i].getType(); + this.addresses[i] = unsafe.objectFieldOffset(fields[i]); + } + } + + @Override + public void set(Object instance, int fieldIndex, Object value) + { + unsafe.putObject(instance, addresses[fieldIndex], value); + } + + @Override + public void setBoolean(Object instance, int fieldIndex, boolean value) + { + unsafe.putBoolean(instance, addresses[fieldIndex], value); + } + + @Override + public void setByte(Object instance, int fieldIndex, byte value) + { + unsafe.putByte(instance, addresses[fieldIndex], value); + } + + @Override + public void setShort(Object instance, int fieldIndex, short value) + { + unsafe.putShort(instance, addresses[fieldIndex], value); + } + + @Override + public void setInt(Object instance, int fieldIndex, int value) + { + unsafe.putInt(instance, addresses[fieldIndex], value); + } + + @Override + public void setLong(Object instance, int fieldIndex, long value) + { + unsafe.putLong(instance, addresses[fieldIndex], value); + } + + @Override + public void setDouble(Object instance, int fieldIndex, double value) + { + unsafe.putDouble(instance, addresses[fieldIndex], value); + } + + @Override + public void setFloat(Object instance, int fieldIndex, float value) + { + unsafe.putFloat(instance, addresses[fieldIndex], value); + } + + @Override + public void setChar(Object instance, int fieldIndex, char value) + { + unsafe.putChar(instance, addresses[fieldIndex], value); + } + + @Override + public Object get(Object instance, int fieldIndex) + { + return unsafe.getObject(instance, addresses[fieldIndex]); + } + + @Override + public String getString(Object instance, int fieldIndex) + { + return (String)unsafe.getObject(instance, addresses[fieldIndex]); + } + + @Override + public char getChar(Object instance, int fieldIndex) + { + return unsafe.getChar(instance, addresses[fieldIndex]); + } + + @Override + public boolean getBoolean(Object instance, int fieldIndex) + { + return unsafe.getBoolean(instance, addresses[fieldIndex]); + } + + @Override + public byte getByte(Object instance, int fieldIndex) + { + return unsafe.getByte(instance, addresses[fieldIndex]); + } + + @Override + public short getShort(Object instance, int fieldIndex) + { + return unsafe.getShort(instance, addresses[fieldIndex]); + } + + @Override + public int getInt(Object instance, int fieldIndex) + { + return unsafe.getInt(instance, addresses[fieldIndex]); + } + + @Override + public long getLong(Object instance, int fieldIndex) + { + return unsafe.getLong(instance, addresses[fieldIndex]); + } + + @Override + public double getDouble(Object instance, int fieldIndex) + { + return unsafe.getDouble(instance, addresses[fieldIndex]); + } + + @Override + public float getFloat(Object instance, int fieldIndex) + { + return unsafe.getFloat(instance, addresses[fieldIndex]); + } + + long[] addresses; + + private final Unsafe unsafe; +} From b3de9172d88858d5ea0e08dd1ab8bc26f1ae7a09 Mon Sep 17 00:00:00 2001 From: Kumonda221 Date: Mon, 13 Jul 2015 01:20:08 +0800 Subject: [PATCH 3/4] Update FieldAccess.java --- src/com/esotericsoftware/reflectasm/FieldAccess.java | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/com/esotericsoftware/reflectasm/FieldAccess.java b/src/com/esotericsoftware/reflectasm/FieldAccess.java index 87422e2..4e92aba 100644 --- a/src/com/esotericsoftware/reflectasm/FieldAccess.java +++ b/src/com/esotericsoftware/reflectasm/FieldAccess.java @@ -28,8 +28,8 @@ public abstract class FieldAccess { private static final Object theUnsafe; - private String[] fieldNames; - private Class[] fieldTypes; + protected String[] fieldNames; + protected Class[] fieldTypes; public int getIndex (String fieldName) { for (int i = 0, n = fieldNames.length; i < n; i++) From 3a3c22061b2e7e15a36656ce4c75b00a84df8fb3 Mon Sep 17 00:00:00 2001 From: Kumonda221 Date: Mon, 13 Jul 2015 01:23:26 +0800 Subject: [PATCH 4/4] Added field access by sun.misc.Unsafe. --- src/com/esotericsoftware/reflectasm/FieldAccess.java | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/com/esotericsoftware/reflectasm/FieldAccess.java b/src/com/esotericsoftware/reflectasm/FieldAccess.java index 4e92aba..c20fc3b 100644 --- a/src/com/esotericsoftware/reflectasm/FieldAccess.java +++ b/src/com/esotericsoftware/reflectasm/FieldAccess.java @@ -7,7 +7,7 @@ * 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * 3. Neither the name of Esoteric Software nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. - * + * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */