--- a/nashorn/src/jdk/nashorn/internal/runtime/regexp/joni/AsmCompilerSupport.java Mon Jun 03 23:24:15 2013 -0700
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,267 +0,0 @@
-/*
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is furnished to do
- * so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-package jdk.nashorn.internal.runtime.regexp.joni;
-
-import java.io.FileOutputStream;
-import java.io.IOException;
-
-import jdk.nashorn.internal.runtime.regexp.joni.constants.AsmConstants;
-import jdk.internal.org.objectweb.asm.ClassWriter;
-import jdk.internal.org.objectweb.asm.MethodVisitor;
-import jdk.internal.org.objectweb.asm.Opcodes;
-
-abstract class AsmCompilerSupport extends Compiler implements Opcodes, AsmConstants {
- protected ClassWriter factory; // matcher allocator, also bit set, code rage and string template container
- protected MethodVisitor factoryInit;// factory constructor
- protected String factoryName;
-
- protected ClassWriter machine; // matcher
- protected MethodVisitor machineInit;// matcher constructor
- protected MethodVisitor match; // actual matcher implementation (the matchAt method)
- protected String machineName;
-
- // we will? try to manage visitMaxs ourselves for efficiency
- protected int maxStack = 1;
- protected int maxVars = LAST_INDEX;
-
- // for field generation
- protected int bitsets, ranges, templates;
-
- // simple class name postfix scheme for now
- static int REG_NUM = 0;
-
- // dummy class loader for now
- private static final class DummyClassLoader extends ClassLoader {
- public Class<?> defineClass(String name, byte[] bytes) {
- return super.defineClass(name, bytes, 0, bytes.length);
- }
- };
-
- private static final DummyClassLoader loader = new DummyClassLoader();
-
- AsmCompilerSupport(Analyser analyser) {
- super(analyser);
- }
-
- protected final void prepareFactory() {
- factory = new ClassWriter(ClassWriter.COMPUTE_MAXS);
- factoryName = "jdk/nashorn/internal/runtime/regexp/joni/MatcherFactory" + REG_NUM;
-
- factory.visit(V1_4, ACC_PUBLIC + ACC_FINAL, factoryName, null, "jdk/nashorn/internal/runtime/regexp/joni/MatcherFactory", null);
-
- MethodVisitor create = factory.visitMethod(ACC_SYNTHETIC, "create", "(Lorg/joni/Regex;[BII)Lorg/joni/Matcher;", null, null);
- create.visitTypeInsn(NEW, machineName);
- create.visitInsn(DUP); // instance
- create.visitVarInsn(ALOAD, 1); // Regex
- create.visitVarInsn(ALOAD, 2); // bytes[]
- create.visitVarInsn(ILOAD, 3); // p
- create.visitVarInsn(ILOAD, 4); // end
- create.visitMethodInsn(INVOKESPECIAL, machineName, "<init>", "(Lorg/joni/Regex;[BII)V");
- create.visitInsn(ARETURN);
- create.visitMaxs(0, 0);
- //create.visitMaxs(6, 5);
- create.visitEnd();
- }
-
- protected final void prepareFactoryInit() {
- factoryInit = factory.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
- factoryInit.visitVarInsn(ALOAD, 0);
- factoryInit.visitMethodInsn(INVOKESPECIAL, "jdk/nashorn/internal/runtime/regexp/joni/MatcherFactory", "<init>", "()V");
- }
-
- protected final void setupFactoryInit() {
- factoryInit.visitInsn(RETURN);
- factoryInit.visitMaxs(0, 0);
- //init.visitMaxs(1, 1);
- factoryInit.visitEnd();
- }
-
- protected final void prepareMachine() {
- machine = new ClassWriter(ClassWriter.COMPUTE_MAXS);
- machineName = "jdk/nashorn/internal/runtime/regexp/joni/NativeMachine" + REG_NUM;
- }
-
- protected final void prepareMachineInit() {
- machine.visit(V1_4, ACC_PUBLIC + ACC_FINAL, machineName, null, "jdk/nashorn/internal/runtime/regexp/joni/NativeMachine", null);
- machineInit = machine.visitMethod(ACC_PROTECTED, "<init>", "(Lorg/joni/Regex;[BII)V", null, null);
- machineInit.visitVarInsn(ALOAD, THIS); // this
- machineInit.visitVarInsn(ALOAD, 1); // Regex
- machineInit.visitVarInsn(ALOAD, 2); // bytes[]
- machineInit.visitVarInsn(ILOAD, 3); // p
- machineInit.visitVarInsn(ILOAD, 4); // end
- machineInit.visitMethodInsn(INVOKESPECIAL, "jdk/nashorn/internal/runtime/regexp/joni/NativeMachine", "<init>", "(Lorg/joni/Regex;[BII)V");
- }
-
- protected final void setupMachineInit() {
- if (bitsets + ranges + templates > 0) { // ok, some of these are in use, we'd like to cache the factory
- machine.visitField(ACC_PRIVATE + ACC_FINAL, "factory", "L" + factoryName + ";", null, null);
- machineInit.visitVarInsn(ALOAD, THIS); // this
- machineInit.visitVarInsn(ALOAD, 1); // this, Regex
- machineInit.visitFieldInsn(GETFIELD, "jdk/nashorn/internal/runtime/regexp/joni/Regex", "factory", "Lorg/joni/MatcherFactory;"); // this, factory
- machineInit.visitTypeInsn(CHECKCAST, factoryName);
- machineInit.visitFieldInsn(PUTFIELD, machineName, "factory", "L" + factoryName + ";"); // []
- }
-
- machineInit.visitInsn(RETURN);
- machineInit.visitMaxs(0, 0);
- //init.visitMaxs(5, 5);
- machineInit.visitEnd();
- }
-
- protected final void prepareMachineMatch() {
- match = machine.visitMethod(ACC_SYNTHETIC, "matchAt", "(III)I", null, null);
- move(S, SSTART); // s = sstart
- load("bytes", "[B"); //
- astore(BYTES); // byte[]bytes = this.bytes
- }
-
- protected final void setupMachineMatch() {
- match.visitInsn(ICONST_M1);
- match.visitInsn(IRETURN);
-
- match.visitMaxs(maxStack, maxVars);
- match.visitEnd();
- }
-
- protected final void setupClasses() {
- byte[]factoryCode = factory.toByteArray();
- byte[]machineCode = machine.toByteArray();
-
- if (Config.DEBUG_ASM) {
- try {
- FileOutputStream fos;
- fos = new FileOutputStream(factoryName.substring(factoryName.lastIndexOf('/') + 1) + ".class");
- fos.write(factoryCode);
- fos.close();
- fos = new FileOutputStream(machineName.substring(machineName.lastIndexOf('/') + 1) + ".class");
- fos.write(machineCode);
- fos.close();
- } catch (IOException ioe) {
- ioe.printStackTrace(Config.err);
- }
- }
-
- loader.defineClass(machineName.replace('/', '.'), machineCode);
- Class<?> cls = loader.defineClass(factoryName.replace('/', '.'), factoryCode);
- try {
- regex.factory = (MatcherFactory)cls.newInstance();
- } catch(Exception e) {
- e.printStackTrace(Config.err);
- }
- }
-
- protected final void aload(int var) {
- match.visitVarInsn(ALOAD, var);
- }
-
- protected final void astore(int var) {
- match.visitVarInsn(ASTORE, var);
- }
-
- protected final void loadThis() {
- match.visitVarInsn(ALOAD, THIS);
- }
-
- protected final void load(int var) {
- match.visitVarInsn(ILOAD, var);
- }
-
- protected final void store(int var) {
- match.visitVarInsn(ISTORE, var);
- }
-
- protected final void move(int to, int from) {
- load(from);
- store(to);
- }
-
- protected final void load(String field, String singature) {
- loadThis();
- match.visitFieldInsn(GETFIELD, machineName, field, singature);
- }
-
- protected final void load(String field) {
- load(field, "I");
- }
-
- protected final void store(String field, String singature) {
- loadThis();
- match.visitFieldInsn(PUTFIELD, machineName, field, singature);
- }
-
- protected final void store(String field) {
- store(field, "I");
- }
-
- protected final String installTemplate(char[] arr, int p, int length) {
- String templateName = TEMPLATE + ++templates;
- installArray(templateName, arr, p, length);
- return templateName;
- }
-
- protected final String installCodeRange(int[]arr) {
- String coreRangeName = CODERANGE + ++ranges;
- installArray(coreRangeName, arr);
- return coreRangeName;
- }
-
- protected final String installBitSet(int[]arr) {
- String bitsetName = BITSET + ++bitsets;
- installArray(bitsetName, arr);
- return bitsetName;
- }
-
- private void installArray(String name, int[]arr) {
- factory.visitField(ACC_PRIVATE + ACC_FINAL, name, "[I", null, null);
- factoryInit.visitVarInsn(ALOAD, THIS); // this;
- loadInt(factoryInit, arr.length); // this, length
- factoryInit.visitIntInsn(NEWARRAY, T_INT); // this, arr
- for (int i=0;i < arr.length; i++) buildArray(i, arr[i], IASTORE);
- factoryInit.visitFieldInsn(PUTFIELD, factoryName, name, "[I");
- }
-
- private void installArray(String name, char[]arr, int p, int length) {
- factory.visitField(ACC_PRIVATE + ACC_FINAL, name, "[B", null, null);
- factoryInit.visitVarInsn(ALOAD, THIS); // this;
- loadInt(factoryInit, arr.length); // this, length
- factoryInit.visitIntInsn(NEWARRAY, T_BYTE); // this, arr
- for (int i=p, j=0; i < p + length; i++, j++) buildArray(j, arr[i] & 0xff, BASTORE);
- factoryInit.visitFieldInsn(PUTFIELD, factoryName, name, "[B");
- }
-
- private void buildArray(int index, int value, int type) {
- factoryInit.visitInsn(DUP); // ... arr, arr
- loadInt(factoryInit, index); // ... arr, arr, index
- loadInt(factoryInit, value); // ... arr, arr, index, value
- factoryInit.visitInsn(type); // ... arr
- }
-
- private void loadInt(MethodVisitor mv, int value) {
- if (value >= -1 && value <= 5) {
- mv.visitInsn(value + ICONST_0); // ICONST_0 == 3
- } else if (value >= 6 && value <= 127 || value >= -128 && value <= -2) {
- mv.visitIntInsn(BIPUSH, value);
- } else if (value >= 128 && value <= 32767 || value >= -32768 && value <= -129) {
- mv.visitIntInsn(SIPUSH, value);
- } else {
- mv.visitLdcInsn(new Integer(value));
- }
- }
-}