diff options
Diffstat (limited to 'src/jdk/nashorn/internal/ir/debug/NashornClassReader.java')
| -rw-r--r-- | src/jdk/nashorn/internal/ir/debug/NashornClassReader.java | 551 |
1 files changed, 0 insertions, 551 deletions
diff --git a/src/jdk/nashorn/internal/ir/debug/NashornClassReader.java b/src/jdk/nashorn/internal/ir/debug/NashornClassReader.java deleted file mode 100644 index 26d4dc97..00000000 --- a/src/jdk/nashorn/internal/ir/debug/NashornClassReader.java +++ /dev/null @@ -1,551 +0,0 @@ -/* - * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This code is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 only, as - * published by the Free Software Foundation. Oracle designates this - * particular file as subject to the "Classpath" exception as provided - * by Oracle in the LICENSE file that accompanied this code. - * - * This code is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * version 2 for more details (a copy is included in the LICENSE file that - * accompanied this code). - * - * You should have received a copy of the GNU General Public License version - * 2 along with this work; if not, write to the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. - * - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA - * or visit www.oracle.com if you need additional information or have any - * questions. - */ - -package jdk.nashorn.internal.ir.debug; - -import java.util.ArrayList; -import java.util.HashMap; -import java.util.List; -import java.util.Map; -import jdk.internal.org.objectweb.asm.Attribute; -import jdk.internal.org.objectweb.asm.ClassReader; -import jdk.internal.org.objectweb.asm.ClassVisitor; -import jdk.internal.org.objectweb.asm.Label; -import jdk.nashorn.internal.ir.debug.NashornTextifier.NashornLabel; - -/** - * Subclass of the ASM class reader that retains more info, such - * as bytecode offsets - */ -public class NashornClassReader extends ClassReader { - - private final Map<String, List<Label>> labelMap = new HashMap<>(); - - /** - * Constructor - * @param bytecode bytecode for class - */ - public NashornClassReader(final byte[] bytecode) { - super(bytecode); - parse(bytecode); - } - - List<Label> getExtraLabels(final String className, final String methodName, final String methodDesc) { - final String key = fullyQualifiedName(className, methodName, methodDesc); - return labelMap.get(key); - } - - private static int readByte(final byte[] bytecode, final int index) { - return (byte)(bytecode[index] & 0xff); - } - - private static int readShort(final byte[] bytecode, final int index) { - return (short)((bytecode[index] & 0xff) << 8) | (bytecode[index + 1] & 0xff); - } - - private static int readInt(final byte[] bytecode, final int index) { - return ((bytecode[index] & 0xff) << 24) | ((bytecode[index + 1] & 0xff) << 16) | ((bytecode[index + 2] & 0xff) << 8) | (bytecode[index + 3] & 0xff); - } - - private static long readLong(final byte[] bytecode, final int index) { - final int hi = readInt(bytecode, index); - final int lo = readInt(bytecode, index + 4); - return ((long)hi << 32) | lo; - } - - private static String readUTF(final int index, final int utfLen, final byte[] bytecode) { - final int endIndex = index + utfLen; - final char buf[] = new char[utfLen * 2]; - int strLen = 0; - int c; - int st = 0; - char cc = 0; - int i = index; - - while (i < endIndex) { - c = bytecode[i++]; - switch (st) { - case 0: - c = c & 0xFF; - if (c < 0x80) { // 0xxxxxxx - buf[strLen++] = (char) c; - } else if (c < 0xE0 && c > 0xBF) { // 110x xxxx 10xx xxxx - cc = (char) (c & 0x1F); - st = 1; - } else { // 1110 xxxx 10xx xxxx 10xx xxxx - cc = (char) (c & 0x0F); - st = 2; - } - break; - - case 1: // byte 2 of 2-byte char or byte 3 of 3-byte char - buf[strLen++] = (char) ((cc << 6) | (c & 0x3F)); - st = 0; - break; - - case 2: // byte 2 of 3-byte char - cc = (char) ((cc << 6) | (c & 0x3F)); - st = 1; - break; - - default: - break; - } - } - return new String(buf, 0, strLen); - } - - private String parse(final byte[] bytecode) { - String thisClassName; - - int u = 0; - - final int magic = readInt(bytecode, u); - u += 4; //magic - assert magic == 0xcafebabe : Integer.toHexString(magic); - readShort(bytecode, u); //minor - u += 2; - readShort(bytecode, u); //major - u += 2; //minor - - final int cpc = readShort(bytecode, u); - u += 2; - final ArrayList<Constant> cp = new ArrayList<>(cpc); - cp.add(null); - - for (int i = 1; i < cpc; i++) { - //constant pool entries - final int tag = readByte(bytecode, u); - u += 1; - switch (tag) { - case 7: //class - cp.add(new IndexInfo(cp, tag, readShort(bytecode, u))); - u += 2; - break; - case 9: //fieldref - case 10: //methodref - case 11: //interfacemethodref - cp.add(new IndexInfo2(cp, tag, readShort(bytecode, u), readShort(bytecode, u + 2))); - u += 4; - break; - case 8: //string - cp.add(new IndexInfo(cp, tag, readShort(bytecode, u))); //string index - u += 2; - break; - case 3: //int - cp.add(new DirectInfo<>(cp, tag, readInt(bytecode, u))); - u += 4; - break; - case 4: //float - cp.add(new DirectInfo<>(cp, tag, Float.intBitsToFloat(readInt(bytecode, u)))); - u += 4; - break; - case 5: //long - cp.add(new DirectInfo<>(cp, tag, readLong(bytecode, u))); - cp.add(null); - i++; - u += 8; - break; - case 6: //double - cp.add(new DirectInfo<>(cp, tag, Double.longBitsToDouble(readLong(bytecode, u)))); - cp.add(null); - i++; - u += 8; - break; - case 12: //name and type - cp.add(new IndexInfo2(cp, tag, readShort(bytecode, u), readShort(bytecode, u + 2))); - u += 4; - break; - case 1: //utf8 - final int len = readShort(bytecode, u); - u += 2; - cp.add(new DirectInfo<>(cp, tag, readUTF(u, len, bytecode))); - u += len; - break; - case 16: //methodtype - cp.add(new IndexInfo(cp, tag, readShort(bytecode, u))); - u += 2; - break; - case 18: //indy - cp.add(new IndexInfo2(cp, tag, readShort(bytecode, u), readShort(bytecode, u + 2)) { - @Override - public String toString() { - return "#" + index + ' ' + cp.get(index2).toString(); - } - - }); - u += 4; - break; - case 15: //methodhandle - final int kind = readByte(bytecode, u); - assert kind >= 1 && kind <= 9 : kind; - cp.add(new IndexInfo2(cp, tag, kind, readShort(bytecode, u + 1)) { - @Override - public String toString() { - return "#" + index + ' ' + cp.get(index2).toString(); - } - }); - - u += 3; - break; - default: - assert false : tag; - break; - } - } - - readShort(bytecode, u); //access flags - u += 2; //access - final int cls = readShort(bytecode, u); - u += 2; //this_class - thisClassName = cp.get(cls).toString(); - u += 2; //super - - final int ifc = readShort(bytecode, u); - u += 2; - u += ifc * 2; - - final int fc = readShort(bytecode, u); - u += 2; //fields - - for (int i = 0 ; i < fc ; i++) { - u += 2; //access - readShort(bytecode, u); //fieldname - u += 2; //name - u += 2; //descriptor - final int ac = readShort(bytecode, u); - u += 2; - //field attributes - for (int j = 0; j < ac; j++) { - u += 2; //attribute name - final int len = readInt(bytecode, u); - u += 4; - u += len; - } - } - - final int mc = readShort(bytecode, u); - u += 2; - for (int i = 0 ; i < mc ; i++) { - readShort(bytecode, u); - u += 2; //access - - final int methodNameIndex = readShort(bytecode, u); - u += 2; - final String methodName = cp.get(methodNameIndex).toString(); - - final int methodDescIndex = readShort(bytecode, u); - u += 2; - final String methodDesc = cp.get(methodDescIndex).toString(); - - final int ac = readShort(bytecode, u); - u += 2; - - //method attributes - for (int j = 0; j < ac; j++) { - final int nameIndex = readShort(bytecode, u); - u += 2; - final String attrName = cp.get(nameIndex).toString(); - - final int attrLen = readInt(bytecode, u); - u += 4; - - if ("Code".equals(attrName)) { - readShort(bytecode, u); - u += 2; //max stack - readShort(bytecode, u); - u += 2; //max locals - final int len = readInt(bytecode, u); - u += 4; - parseCode(bytecode, u, len, fullyQualifiedName(thisClassName, methodName, methodDesc)); - u += len; - final int elen = readShort(bytecode, u); //exception table length - u += 2; - u += elen * 8; - - //method attributes - final int ac2 = readShort(bytecode, u); - u += 2; - for (int k = 0; k < ac2; k++) { - u += 2; //name; - final int aclen = readInt(bytecode, u); - u += 4; //length - u += aclen; //bytes; - } - } else { - u += attrLen; - } - } - } - - final int ac = readShort(bytecode, u); - u += 2; - //other attributes - for (int i = 0 ; i < ac ; i++) { - readShort(bytecode, u); //name index - u += 2; - final int len = readInt(bytecode, u); - u += 4; - u += len; - //attribute - } - - return thisClassName; - } - - private static String fullyQualifiedName(final String className, final String methodName, final String methodDesc) { - return className + '.' + methodName + methodDesc; - } - - private void parseCode(final byte[] bytecode, final int index, final int len, final String desc) { - final List<Label> labels = new ArrayList<>(); - labelMap.put(desc, labels); - - boolean wide = false; - - for (int i = index; i < index + len;) { - final int opcode = bytecode[i]; - labels.add(new NashornLabel(opcode, i - index)); - - switch (opcode & 0xff) { - case 0xc4: //wide - wide = true; - i += 1; - break; - case 0xa9: //ret - i += wide ? 4 : 2; - break; - case 0xab: //lookupswitch - i += 1; - while (((i - index) & 3) != 0) { - i++; - } - readInt(bytecode, i); - i += 4; //defaultbyte - final int npairs = readInt(bytecode, i); - i += 4; - i += 8 * npairs; - break; - case 0xaa: //tableswitch - i += 1; - while (((i - index) & 3) != 0) { - i++; - } - readInt(bytecode, i); //default - i += 4; - final int lo = readInt(bytecode, i); - i += 4; - final int hi = readInt(bytecode, i); - i += 4; - i += 4 * (hi - lo + 1); - break; - case 0xc5: //multianewarray - i += 4; - break; - case 0x19: //aload (wide) - case 0x18: //dload - case 0x17: //fload - case 0x15: //iload - case 0x16: //lload - case 0x3a: //astore wide - case 0x39: //dstore - case 0x38: //fstore - case 0x36: //istore - case 0x37: //lstore - i += wide ? 3 : 2; - break; - case 0x10: //bipush - case 0x12: //ldc - case 0xbc: //anewarrayu - i += 2; - break; - case 0xb4: //getfield - case 0xb2: //getstatic - case 0xbd: //anewarray - case 0xc0: //checkcast - case 0xa5: //ifacmp_eq - case 0xa6: //ifacmp_ne - case 0x9f: //all ifs and ifcmps - case 0xa0: - case 0xa1: - case 0xa2: - case 0xa3: - case 0xa4: - case 0x99: - case 0x9a: - case 0x9b: - case 0x9c: - case 0x9d: - case 0x9e: - case 0xc7: - case 0xc6: - case 0xc1: //instanceof - case 0xa7: //goto - case 0xb7: //special - case 0xb8: //static - case 0xb6: //virtual - case 0xa8: //jsr - case 0x13: //ldc_w - case 0x14: //ldc2_w - case 0xbb: //new - case 0xb5: //putfield - case 0xb3: //putstatic - case 0x11: //sipush - i += 3; - break; - case 0x84: //iinc (wide) - i += wide ? 5 : 3; - break; - case 0xba: //indy - case 0xb9: //interface - case 0xc8: - case 0xc9: //jsr_w - i += 5; //goto_w - break; - default: - i++; - break; - } - - if (wide) { - wide = false; - } - } - } - - @Override - public void accept(final ClassVisitor classVisitor, final Attribute[] attrs, final int flags) { - super.accept(classVisitor, attrs, flags); - } - - @Override - protected Label readLabel(final int offset, final Label[] labels) { - final Label label = super.readLabel(offset, labels); - label.info = offset; - return label; - } - - private abstract static class Constant { - protected ArrayList<Constant> cp; - protected int tag; - protected Constant(final ArrayList<Constant> cp, final int tag) { - this.cp = cp; - this.tag = tag; - } - - @SuppressWarnings("unused") - final String getType() { - String str = type[tag]; - while (str.length() < 16) { - str += " "; - } - return str; - } - } - - private static class IndexInfo extends Constant { - protected final int index; - - IndexInfo(final ArrayList<Constant> cp, final int tag, final int index) { - super(cp, tag); - this.index = index; - } - - @Override - public String toString() { - return cp.get(index).toString(); - } - } - - private static class IndexInfo2 extends IndexInfo { - protected final int index2; - - IndexInfo2(final ArrayList<Constant> cp, final int tag, final int index, final int index2) { - super(cp, tag, index); - this.index2 = index2; - } - - @Override - public String toString() { - return super.toString() + ' ' + cp.get(index2).toString(); - } - } - - private static class DirectInfo<T> extends Constant { - protected final T info; - - DirectInfo(final ArrayList<Constant> cp, final int tag, final T info) { - super(cp, tag); - this.info = info; - } - - @Override - public String toString() { - return info.toString();// + " [class=" + info.getClass().getSimpleName() + ']'; - } - } - - private static String type[] = { - //0 - "<error>", - //1 - "UTF8", - //2 - "<error>", - //3 - "Integer", - //4 - "Float", - //5 - "Long", - //6 - "Double", - //7 - "Class", - //8 - "String", - //9 - "Fieldref", - //10 - "Methodref", - //11 - "InterfaceMethodRef", - //12 - "NameAndType", - //13 - "<error>", - //14 - "<error>", - //15 - "MethodHandle", - //16 - "MethodType", - //17 - "<error>", - //18 - "Invokedynamic" - }; - -} |