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src/java.xml/share/classes/com/sun/org/apache/bcel/internal/util/InstructionFinder.java
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* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
package com.sun.org.apache.bcel.internal.util;
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-import com.sun.org.apache.bcel.internal.Constants;
-import com.sun.org.apache.bcel.internal.generic.*;
-import java.util.*;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
+import com.sun.org.apache.bcel.internal.Const;
+import com.sun.org.apache.bcel.internal.generic.ClassGenException;
+import com.sun.org.apache.bcel.internal.generic.InstructionHandle;
+import com.sun.org.apache.bcel.internal.generic.InstructionList;
+
/**
- * InstructionFinder is a tool to search for given instructions patterns,
- * i.e., match sequences of instructions in an instruction list via
- * regular expressions. This can be used, e.g., in order to implement
- * a peep hole optimizer that looks for code patterns and replaces
- * them with faster equivalents.
- *
- * <p>This class internally uses the <a href="http://jakarta.apache.org/regexp/">
- * Regexp</a> package to search for regular expressions.
+ * InstructionFinder is a tool to search for given instructions patterns, i.e.,
+ * match sequences of instructions in an instruction list via regular
+ * expressions. This can be used, e.g., in order to implement a peep hole
+ * optimizer that looks for code patterns and replaces them with faster
+ * equivalents.
+ *
+ * <p>
+ * This class internally uses the java.util.regex
+ * package to search for regular expressions.
*
* A typical application would look like this:
-<pre>
- InstructionFinder f = new InstructionFinder(il);
- String pat = "IfInstruction ICONST_0 GOTO ICONST_1 NOP (IFEQ|IFNE)";
-
- for(Iterator i = f.search(pat, constraint); i.hasNext(); ) {
- InstructionHandle[] match = (InstructionHandle[])i.next();
- ...
- il.delete(match[1], match[5]);
- ...
- }
-</pre>
- * @author <A HREF="http://www.berlin.de/~markus.dahm/">M. Dahm</A>
- * @see Instruction
+ *
+ * <pre>
+ *
+ *
+ * InstructionFinder f = new InstructionFinder(il);
+ * String pat = "IfInstruction ICONST_0 GOTO ICONST_1 NOP (IFEQ|IFNE)";
+ *
+ * for (Iterator i = f.search(pat, constraint); i.hasNext(); ) {
+ * InstructionHandle[] match = (InstructionHandle[])i.next();
+ * ...
+ * il.delete(match[1], match[5]);
+ * ...
+ * }
+ *
+ *
+ * </pre>
+ *
+ * @version $Id: InstructionFinder.java 1749603 2016-06-21 20:50:19Z ggregory $
+ * @see com.sun.org.apache.bcel.internal.generic.Instruction
* @see InstructionList
*/
public class InstructionFinder {
+
private static final int OFFSET = 32767; // char + OFFSET is outside of LATIN-1
private static final int NO_OPCODES = 256; // Potential number, some are not used
-
- private static final HashMap map = new HashMap(); // Map<String,Pattern>
-
- private InstructionList il;
+ private static final Map<String, String> map = new HashMap<>();
+ private final InstructionList il;
private String il_string; // instruction list as string
- private InstructionHandle[] handles; // map instruction list to array
+ private InstructionHandle[] handles; // map instruction
+
+ // list to array
/**
- * @param il instruction list to search for given patterns
+ * @param il
+ * instruction list to search for given patterns
*/
- public InstructionFinder(InstructionList il) {
+ public InstructionFinder(final InstructionList il) {
this.il = il;
reread();
}
+
/**
- * Reread the instruction list, e.g., after you've altered the list upon a match.
+ * Reread the instruction list, e.g., after you've altered the list upon a
+ * match.
*/
public final void reread() {
- int size = il.getLength();
- char[] buf = new char[size]; // Create a string with length equal to il length
+ final int size = il.getLength();
+ final char[] buf = new char[size]; // Create a string with length equal to il length
handles = il.getInstructionHandles();
-
// Map opcodes to characters
- for(int i=0; i < size; i++)
+ for (int i = 0; i < size; i++) {
buf[i] = makeChar(handles[i].getInstruction().getOpcode());
-
+ }
il_string = new String(buf);
}
+
/**
* Map symbolic instruction names like "getfield" to a single character.
*
- * @param pattern instruction pattern in lower case
+ * @param pattern
+ * instruction pattern in lower case
* @return encoded string for a pattern such as "BranchInstruction".
*/
- private static final String mapName(String pattern) {
- String result = (String)map.get(pattern);
-
- if(result != null)
+ private static String mapName( final String pattern ) {
+ final String result = map.get(pattern);
+ if (result != null) {
return result;
-
- for(short i=0; i < NO_OPCODES; i++)
- if(pattern.equals(Constants.OPCODE_NAMES[i]))
+ }
+ for (short i = 0; i < NO_OPCODES; i++) {
+ if (pattern.equals(Const.getOpcodeName(i))) {
return "" + makeChar(i);
-
+ }
+ }
throw new RuntimeException("Instruction unknown: " + pattern);
}
+
/**
- * Replace symbolic names of instructions with the appropiate character and remove
- * all white space from string. Meta characters such as +, * are ignored.
+ * Replace symbolic names of instructions with the appropiate character and
+ * remove all white space from string. Meta characters such as +, * are
+ * ignored.
*
- * @param pattern The pattern to compile
+ * @param pattern
+ * The pattern to compile
* @return translated regular expression string
*/
- private static final String compilePattern(String pattern) {
- String lower = pattern.toLowerCase();
- StringBuffer buf = new StringBuffer();
- int size = pattern.length();
-
- for(int i=0; i < size; i++) {
+ private static String compilePattern( final String pattern ) {
+ //Bug: BCEL-77 - Instructions are assumed to be english, to avoid odd Locale issues
+ final String lower = pattern.toLowerCase(Locale.ENGLISH);
+ final StringBuilder buf = new StringBuilder();
+ final int size = pattern.length();
+ for (int i = 0; i < size; i++) {
char ch = lower.charAt(i);
-
- if(Character.isLetterOrDigit(ch)) {
- StringBuffer name = new StringBuffer();
-
- while((Character.isLetterOrDigit(ch) || ch == '_') && i < size) {
+ if (Character.isLetterOrDigit(ch)) {
+ final StringBuilder name = new StringBuilder();
+ while ((Character.isLetterOrDigit(ch) || ch == '_') && i < size) {
name.append(ch);
-
- if(++i < size)
+ if (++i < size) {
ch = lower.charAt(i);
- else
+ } else {
break;
}
-
+ }
i--;
-
buf.append(mapName(name.toString()));
- } else if(!Character.isWhitespace(ch))
+ } else if (!Character.isWhitespace(ch)) {
buf.append(ch);
}
-
+ }
return buf.toString();
}
+
/**
* @return the matched piece of code as an array of instruction (handles)
*/
- private InstructionHandle[] getMatch(int matched_from, int match_length) {
- InstructionHandle[] match = new InstructionHandle[match_length];
+ private InstructionHandle[] getMatch( final int matched_from, final int match_length ) {
+ final InstructionHandle[] match = new InstructionHandle[match_length];
System.arraycopy(handles, matched_from, match, 0, match_length);
-
return match;
}
+
/**
- * Search for the given pattern in the instruction list. You can search for any valid
- * opcode via its symbolic name, e.g. "istore". You can also use a super class or
- * an interface name to match a whole set of instructions, e.g. "BranchInstruction" or
- * "LoadInstruction". "istore" is also an alias for all "istore_x" instructions. Additional
- * aliases are "if" for "ifxx", "if_icmp" for "if_icmpxx", "if_acmp" for "if_acmpxx".
- *
- * Consecutive instruction names must be separated by white space which will be removed
- * during the compilation of the pattern.
- *
- * For the rest the usual pattern matching rules for regular expressions apply.<P>
+ * Search for the given pattern in the instruction list. You can search for
+ * any valid opcode via its symbolic name, e.g. "istore". You can also use a
+ * super class or an interface name to match a whole set of instructions, e.g.
+ * "BranchInstruction" or "LoadInstruction". "istore" is also an alias for all
+ * "istore_x" instructions. Additional aliases are "if" for "ifxx", "if_icmp"
+ * for "if_icmpxx", "if_acmp" for "if_acmpxx".
+ *
+ * Consecutive instruction names must be separated by white space which will
+ * be removed during the compilation of the pattern.
+ *
+ * For the rest the usual pattern matching rules for regular expressions
+ * apply.
+ * <P>
* Example pattern:
+ *
* <pre>
- search("BranchInstruction NOP ((IfInstruction|GOTO)+ ISTORE Instruction)*");
+ * search("BranchInstruction NOP ((IfInstruction|GOTO)+ ISTORE Instruction)*");
* </pre>
*
- * <p>If you alter the instruction list upon a match such that other
- * matching areas are affected, you should call reread() to update
- * the finder and call search() again, because the matches are cached.
- *
- * @param pattern the instruction pattern to search for, where case is ignored
- * @param from where to start the search in the instruction list
- * @param constraint optional CodeConstraint to check the found code pattern for
+ * <p>
+ * If you alter the instruction list upon a match such that other matching
+ * areas are affected, you should call reread() to update the finder and call
+ * search() again, because the matches are cached.
+ *
+ * @param pattern
+ * the instruction pattern to search for, where case is ignored
+ * @param from
+ * where to start the search in the instruction list
+ * @param constraint
+ * optional CodeConstraint to check the found code pattern for
* user-defined constraints
- * @return iterator of matches where e.nextElement() returns an array of instruction handles
- * describing the matched area
+ * @return iterator of matches where e.nextElement() returns an array of
+ * instruction handles describing the matched area
*/
- public final Iterator search(String pattern, InstructionHandle from,
- CodeConstraint constraint)
- {
- String search = compilePattern(pattern);
+ public final Iterator<InstructionHandle[]> search( final String pattern,
+ final InstructionHandle from, final CodeConstraint constraint ) {
+ final String search = compilePattern(pattern);
int start = -1;
-
- for(int i=0; i < handles.length; i++) {
- if(handles[i] == from) {
+ for (int i = 0; i < handles.length; i++) {
+ if (handles[i] == from) {
start = i; // Where to start search from (index)
break;
}
}
-
- if(start == -1)
- throw new ClassGenException("Instruction handle " + from +
- " not found in instruction list.");
-
- Pattern regex = Pattern.compile(search);
- List<InstructionHandle[]> matches = new ArrayList<>();
- Matcher matcher = regex.matcher(il_string);
- while(start < il_string.length() && matcher.find(start)) {
- int startExpr = matcher.start();
- int endExpr = matcher.end();
- int lenExpr = endExpr - startExpr;
- InstructionHandle[] match = getMatch(startExpr, lenExpr);
-
- if((constraint == null) || constraint.checkCode(match))
+ if (start == -1) {
+ throw new ClassGenException("Instruction handle " + from
+ + " not found in instruction list.");
+ }
+ final Pattern regex = Pattern.compile(search);
+ final List<InstructionHandle[]> matches = new ArrayList<>();
+ final Matcher matcher = regex.matcher(il_string);
+ while (start < il_string.length() && matcher.find(start)) {
+ final int startExpr = matcher.start();
+ final int endExpr = matcher.end();
+ final int lenExpr = endExpr - startExpr;
+ final InstructionHandle[] match = getMatch(startExpr, lenExpr);
+ if ((constraint == null) || constraint.checkCode(match)) {
matches.add(match);
+ }
start = endExpr;
}
-
return matches.iterator();
}
+
/**
* Start search beginning from the start of the given instruction list.
*
- * @param pattern the instruction pattern to search for, where case is ignored
- * @return iterator of matches where e.nextElement()
- * returns an array of instruction handles describing the matched
- * area
+ * @param pattern
+ * the instruction pattern to search for, where case is ignored
+ * @return iterator of matches where e.nextElement() returns an array of
+ * instruction handles describing the matched area
*/
- public final Iterator search(String pattern) {
+ public final Iterator<InstructionHandle[]> search( final String pattern ) {
return search(pattern, il.getStart(), null);
}
+
/**
* Start search beginning from `from'.
*
- * @param pattern the instruction pattern to search for, where case is ignored
- * @param from where to start the search in the instruction list
- * @return iterator of matches where e.nextElement() returns an array of instruction handles
- * describing the matched area
+ * @param pattern
+ * the instruction pattern to search for, where case is ignored
+ * @param from
+ * where to start the search in the instruction list
+ * @return iterator of matches where e.nextElement() returns an array of
+ * instruction handles describing the matched area
*/
- public final Iterator search(String pattern, InstructionHandle from) {
+ public final Iterator<InstructionHandle[]> search( final String pattern,
+ final InstructionHandle from ) {
return search(pattern, from, null);
}
+
/**
- * Start search beginning from the start of the given instruction list.
- * Check found matches with the constraint object.
+ * Start search beginning from the start of the given instruction list. Check
+ * found matches with the constraint object.
*
- * @param pattern the instruction pattern to search for, case is ignored
- * @param constraint constraints to be checked on matching code
+ * @param pattern
+ * the instruction pattern to search for, case is ignored
+ * @param constraint
+ * constraints to be checked on matching code
* @return instruction handle or `null' if the match failed
*/
- public final Iterator search(String pattern, CodeConstraint constraint) {
+ public final Iterator<InstructionHandle[]> search( final String pattern,
+ final CodeConstraint constraint ) {
return search(pattern, il.getStart(), constraint);
}
+
/**
* Convert opcode number to char.
*/
- private static final char makeChar(short opcode) {
- return (char)(opcode + OFFSET);
+ private static char makeChar( final short opcode ) {
+ return (char) (opcode + OFFSET);
}
+
/**
* @return the inquired instruction list
*/
- public final InstructionList getInstructionList() { return il; }
+ public final InstructionList getInstructionList() {
+ return il;
+ }
/**
- * Code patterns found may be checked using an additional
- * user-defined constraint object whether they really match the needed criterion.
- * I.e., check constraints that can not expressed with regular expressions.
+ * Code patterns found may be checked using an additional user-defined
+ * constraint object whether they really match the needed criterion. I.e.,
+ * check constraints that can not expressed with regular expressions.
*
*/
public interface CodeConstraint {
+
/**
- * @param match array of instructions matching the requested pattern
+ * @param match
+ * array of instructions matching the requested pattern
* @return true if the matched area is really useful
*/
- public boolean checkCode(InstructionHandle[] match);
+ boolean checkCode( InstructionHandle[] match );
}
// Initialize pattern map
-
static {
- map.put("arithmeticinstruction", "(irem|lrem|iand|ior|ineg|isub|lneg|fneg|fmul|ldiv|fadd|lxor|frem|idiv|land|ixor|ishr|fsub|lshl|fdiv|iadd|lor|dmul|lsub|ishl|imul|lmul|lushr|dneg|iushr|lshr|ddiv|drem|dadd|ladd|dsub)");
- map.put("invokeinstruction", "(invokevirtual|invokeinterface|invokestatic|invokespecial)");
+ map.put("arithmeticinstruction","(irem|lrem|iand|ior|ineg|isub|lneg|fneg|fmul|ldiv|fadd|lxor|frem|idiv|land|ixor|ishr|fsub|lshl|fdiv|iadd|lor|dmul|lsub|ishl|imul|lmul|lushr|dneg|iushr|lshr|ddiv|drem|dadd|ladd|dsub)");
+ map.put("invokeinstruction", "(invokevirtual|invokeinterface|invokestatic|invokespecial|invokedynamic)");
map.put("arrayinstruction", "(baload|aastore|saload|caload|fastore|lastore|iaload|castore|iastore|aaload|bastore|sastore|faload|laload|daload|dastore)");
map.put("gotoinstruction", "(goto|goto_w)");
map.put("conversioninstruction", "(d2l|l2d|i2s|d2i|l2i|i2b|l2f|d2f|f2i|i2d|i2l|f2d|i2c|f2l|i2f)");
- map.put("localvariableinstruction", "(fstore|iinc|lload|dstore|dload|iload|aload|astore|istore|fload|lstore)");
+ map.put("localvariableinstruction","(fstore|iinc|lload|dstore|dload|iload|aload|astore|istore|fload|lstore)");
map.put("loadinstruction", "(fload|dload|lload|iload|aload)");
map.put("fieldinstruction", "(getfield|putstatic|getstatic|putfield)");
- map.put("cpinstruction", "(ldc2_w|invokeinterface|multianewarray|putstatic|instanceof|getstatic|checkcast|getfield|invokespecial|ldc_w|invokestatic|invokevirtual|putfield|ldc|new|anewarray)");
+ map.put("cpinstruction", "(ldc2_w|invokeinterface|invokedynamic|multianewarray|putstatic|instanceof|getstatic|checkcast|getfield|invokespecial|ldc_w|invokestatic|invokevirtual|putfield|ldc|new|anewarray)");
map.put("stackinstruction", "(dup2|swap|dup2_x2|pop|pop2|dup|dup2_x1|dup_x2|dup_x1)");
map.put("branchinstruction", "(ifle|if_acmpne|if_icmpeq|if_acmpeq|ifnonnull|goto_w|iflt|ifnull|if_icmpne|tableswitch|if_icmple|ifeq|if_icmplt|jsr_w|if_icmpgt|ifgt|jsr|goto|ifne|ifge|lookupswitch|if_icmpge)");
map.put("returninstruction", "(lreturn|ireturn|freturn|dreturn|areturn|return)");
map.put("storeinstruction", "(istore|fstore|dstore|astore|lstore)");
map.put("select", "(tableswitch|lookupswitch)");
map.put("ifinstruction", "(ifeq|ifgt|if_icmpne|if_icmpeq|ifge|ifnull|ifne|if_icmple|if_icmpge|if_acmpeq|if_icmplt|if_acmpne|ifnonnull|iflt|if_icmpgt|ifle)");
map.put("jsrinstruction", "(jsr|jsr_w)");
map.put("variablelengthinstruction", "(tableswitch|jsr|goto|lookupswitch)");
map.put("unconditionalbranch", "(goto|jsr|jsr_w|athrow|goto_w)");
map.put("constantpushinstruction", "(dconst|bipush|sipush|fconst|iconst|lconst)");
- map.put("typedinstruction", "(imul|lsub|aload|fload|lor|new|aaload|fcmpg|iand|iaload|lrem|idiv|d2l|isub|dcmpg|dastore|ret|f2d|f2i|drem|iinc|i2c|checkcast|frem|lreturn|astore|lushr|daload|dneg|fastore|istore|lshl|ldiv|lstore|areturn|ishr|ldc_w|invokeinterface|aastore|lxor|ishl|l2d|i2f|return|faload|sipush|iushr|caload|instanceof|invokespecial|putfield|fmul|ireturn|laload|d2f|lneg|ixor|i2l|fdiv|lastore|multianewarray|i2b|getstatic|i2d|putstatic|fcmpl|saload|ladd|irem|dload|jsr_w|dconst|dcmpl|fsub|freturn|ldc|aconst_null|castore|lmul|ldc2_w|dadd|iconst|f2l|ddiv|dstore|land|jsr|anewarray|dmul|bipush|dsub|sastore|d2i|i2s|lshr|iadd|l2i|lload|bastore|fstore|fneg|iload|fadd|baload|fconst|ior|ineg|dreturn|l2f|lconst|getfield|invokevirtual|invokestatic|iastore)");
+ map.put("typedinstruction", "(imul|lsub|aload|fload|lor|new|aaload|fcmpg|iand|iaload|lrem|idiv|d2l|isub|dcmpg|dastore|ret|f2d|f2i|drem|iinc|i2c|checkcast|frem|lreturn|astore|lushr|daload|dneg|fastore|istore|lshl|ldiv|lstore|areturn|ishr|ldc_w|invokeinterface|invokedynamic|aastore|lxor|ishl|l2d|i2f|return|faload|sipush|iushr|caload|instanceof|invokespecial|putfield|fmul|ireturn|laload|d2f|lneg|ixor|i2l|fdiv|lastore|multianewarray|i2b|getstatic|i2d|putstatic|fcmpl|saload|ladd|irem|dload|jsr_w|dconst|dcmpl|fsub|freturn|ldc|aconst_null|castore|lmul|ldc2_w|dadd|iconst|f2l|ddiv|dstore|land|jsr|anewarray|dmul|bipush|dsub|sastore|d2i|i2s|lshr|iadd|l2i|lload|bastore|fstore|fneg|iload|fadd|baload|fconst|ior|ineg|dreturn|l2f|lconst|getfield|invokevirtual|invokestatic|iastore)");
map.put("popinstruction", "(fstore|dstore|pop|pop2|astore|putstatic|istore|lstore)");
map.put("allocationinstruction", "(multianewarray|new|anewarray|newarray)");
- map.put("indexedinstruction", "(lload|lstore|fload|ldc2_w|invokeinterface|multianewarray|astore|dload|putstatic|instanceof|getstatic|checkcast|getfield|invokespecial|dstore|istore|iinc|ldc_w|ret|fstore|invokestatic|iload|putfield|invokevirtual|ldc|new|aload|anewarray)");
+ map.put("indexedinstruction", "(lload|lstore|fload|ldc2_w|invokeinterface|invokedynamic|multianewarray|astore|dload|putstatic|instanceof|getstatic|checkcast|getfield|invokespecial|dstore|istore|iinc|ldc_w|ret|fstore|invokestatic|iload|putfield|invokevirtual|ldc|new|aload|anewarray)");
map.put("pushinstruction", "(dup|lload|dup2|bipush|fload|ldc2_w|sipush|lconst|fconst|dload|getstatic|ldc_w|aconst_null|dconst|iload|ldc|iconst|aload)");
- map.put("stackproducer", "(imul|lsub|aload|fload|lor|new|aaload|fcmpg|iand|iaload|lrem|idiv|d2l|isub|dcmpg|dup|f2d|f2i|drem|i2c|checkcast|frem|lushr|daload|dneg|lshl|ldiv|ishr|ldc_w|invokeinterface|lxor|ishl|l2d|i2f|faload|sipush|iushr|caload|instanceof|invokespecial|fmul|laload|d2f|lneg|ixor|i2l|fdiv|getstatic|i2b|swap|i2d|dup2|fcmpl|saload|ladd|irem|dload|jsr_w|dconst|dcmpl|fsub|ldc|arraylength|aconst_null|tableswitch|lmul|ldc2_w|iconst|dadd|f2l|ddiv|land|jsr|anewarray|dmul|bipush|dsub|d2i|newarray|i2s|lshr|iadd|lload|l2i|fneg|iload|fadd|baload|fconst|lookupswitch|ior|ineg|lconst|l2f|getfield|invokevirtual|invokestatic)");
- map.put("stackconsumer", "(imul|lsub|lor|iflt|fcmpg|if_icmpgt|iand|ifeq|if_icmplt|lrem|ifnonnull|idiv|d2l|isub|dcmpg|dastore|if_icmpeq|f2d|f2i|drem|i2c|checkcast|frem|lreturn|astore|lushr|pop2|monitorexit|dneg|fastore|istore|lshl|ldiv|lstore|areturn|if_icmpge|ishr|monitorenter|invokeinterface|aastore|lxor|ishl|l2d|i2f|return|iushr|instanceof|invokespecial|fmul|ireturn|d2f|lneg|ixor|pop|i2l|ifnull|fdiv|lastore|i2b|if_acmpeq|ifge|swap|i2d|putstatic|fcmpl|ladd|irem|dcmpl|fsub|freturn|ifgt|castore|lmul|dadd|f2l|ddiv|dstore|land|if_icmpne|if_acmpne|dmul|dsub|sastore|ifle|d2i|i2s|lshr|iadd|l2i|bastore|fstore|fneg|fadd|ior|ineg|ifne|dreturn|l2f|if_icmple|getfield|invokevirtual|invokestatic|iastore)");
- map.put("exceptionthrower", "(irem|lrem|laload|putstatic|baload|dastore|areturn|getstatic|ldiv|anewarray|iastore|castore|idiv|saload|lastore|fastore|putfield|lreturn|caload|getfield|return|aastore|freturn|newarray|instanceof|multianewarray|athrow|faload|iaload|aaload|dreturn|monitorenter|checkcast|bastore|arraylength|new|invokevirtual|sastore|ldc_w|ireturn|invokespecial|monitorexit|invokeinterface|ldc|invokestatic|daload)");
- map.put("loadclass", "(multianewarray|invokeinterface|instanceof|invokespecial|putfield|checkcast|putstatic|invokevirtual|new|getstatic|invokestatic|getfield|anewarray)");
+ map.put("stackproducer", "(imul|lsub|aload|fload|lor|new|aaload|fcmpg|iand|iaload|lrem|idiv|d2l|isub|dcmpg|dup|f2d|f2i|drem|i2c|checkcast|frem|lushr|daload|dneg|lshl|ldiv|ishr|ldc_w|invokeinterface|invokedynamic|lxor|ishl|l2d|i2f|faload|sipush|iushr|caload|instanceof|invokespecial|fmul|laload|d2f|lneg|ixor|i2l|fdiv|getstatic|i2b|swap|i2d|dup2|fcmpl|saload|ladd|irem|dload|jsr_w|dconst|dcmpl|fsub|ldc|arraylength|aconst_null|tableswitch|lmul|ldc2_w|iconst|dadd|f2l|ddiv|land|jsr|anewarray|dmul|bipush|dsub|d2i|newarray|i2s|lshr|iadd|lload|l2i|fneg|iload|fadd|baload|fconst|lookupswitch|ior|ineg|lconst|l2f|getfield|invokevirtual|invokestatic)");
+ map.put("stackconsumer", "(imul|lsub|lor|iflt|fcmpg|if_icmpgt|iand|ifeq|if_icmplt|lrem|ifnonnull|idiv|d2l|isub|dcmpg|dastore|if_icmpeq|f2d|f2i|drem|i2c|checkcast|frem|lreturn|astore|lushr|pop2|monitorexit|dneg|fastore|istore|lshl|ldiv|lstore|areturn|if_icmpge|ishr|monitorenter|invokeinterface|invokedynamic|aastore|lxor|ishl|l2d|i2f|return|iushr|instanceof|invokespecial|fmul|ireturn|d2f|lneg|ixor|pop|i2l|ifnull|fdiv|lastore|i2b|if_acmpeq|ifge|swap|i2d|putstatic|fcmpl|ladd|irem|dcmpl|fsub|freturn|ifgt|castore|lmul|dadd|f2l|ddiv|dstore|land|if_icmpne|if_acmpne|dmul|dsub|sastore|ifle|d2i|i2s|lshr|iadd|l2i|bastore|fstore|fneg|fadd|ior|ineg|ifne|dreturn|l2f|if_icmple|getfield|invokevirtual|invokestatic|iastore)");
+ map.put("exceptionthrower","(irem|lrem|laload|putstatic|baload|dastore|areturn|getstatic|ldiv|anewarray|iastore|castore|idiv|saload|lastore|fastore|putfield|lreturn|caload|getfield|return|aastore|freturn|newarray|instanceof|multianewarray|athrow|faload|iaload|aaload|dreturn|monitorenter|checkcast|bastore|arraylength|new|invokevirtual|sastore|ldc_w|ireturn|invokespecial|monitorexit|invokeinterface|invokedynamic|ldc|invokestatic|daload)");
+ map.put("loadclass", "(multianewarray|invokeinterface|invokedynamic|instanceof|invokespecial|putfield|checkcast|putstatic|invokevirtual|new|getstatic|invokestatic|getfield|anewarray)");
map.put("instructiontargeter", "(ifle|if_acmpne|if_icmpeq|if_acmpeq|ifnonnull|goto_w|iflt|ifnull|if_icmpne|tableswitch|if_icmple|ifeq|if_icmplt|jsr_w|if_icmpgt|ifgt|jsr|goto|ifne|ifge|lookupswitch|if_icmpge)");
-
// Some aliases
map.put("if_icmp", "(if_icmpne|if_icmpeq|if_icmple|if_icmpge|if_icmplt|if_icmpgt)");
map.put("if_acmp", "(if_acmpeq|if_acmpne)");
map.put("if", "(ifeq|ifne|iflt|ifge|ifgt|ifle)");
-
// Precompile some aliases first
- map.put("iconst", precompile(Constants.ICONST_0, Constants.ICONST_5, Constants.ICONST_M1));
- map.put("lconst", new String(new char[] { '(', makeChar(Constants.LCONST_0), '|',
- makeChar(Constants.LCONST_1), ')' }));
- map.put("dconst", new String(new char[] { '(', makeChar(Constants.DCONST_0), '|',
- makeChar(Constants.DCONST_1), ')' }));
- map.put("fconst", new String(new char[] { '(', makeChar(Constants.FCONST_0), '|',
- makeChar(Constants.FCONST_1), ')' }));
-
- map.put("iload", precompile(Constants.ILOAD_0, Constants.ILOAD_3, Constants.ILOAD));
- map.put("dload", precompile(Constants.DLOAD_0, Constants.DLOAD_3, Constants.DLOAD));
- map.put("fload", precompile(Constants.FLOAD_0, Constants.FLOAD_3, Constants.FLOAD));
- map.put("aload", precompile(Constants.ALOAD_0, Constants.ALOAD_3, Constants.ALOAD));
-
- map.put("istore", precompile(Constants.ISTORE_0, Constants.ISTORE_3, Constants.ISTORE));
- map.put("dstore", precompile(Constants.DSTORE_0, Constants.DSTORE_3, Constants.DSTORE));
- map.put("fstore", precompile(Constants.FSTORE_0, Constants.FSTORE_3, Constants.FSTORE));
- map.put("astore", precompile(Constants.ASTORE_0, Constants.ASTORE_3, Constants.ASTORE));
-
+ map.put("iconst", precompile(Const.ICONST_0, Const.ICONST_5, Const.ICONST_M1));
+ map.put("lconst", new String(new char[] { '(', makeChar(Const.LCONST_0), '|', makeChar(Const.LCONST_1), ')' }));
+ map.put("dconst", new String(new char[] { '(', makeChar(Const.DCONST_0), '|', makeChar(Const.DCONST_1), ')' }));
+ map.put("fconst", new String(new char[] { '(', makeChar(Const.FCONST_0), '|', makeChar(Const.FCONST_1), '|', makeChar(Const.FCONST_2), ')' }));
+ map.put("lload", precompile(Const.LLOAD_0, Const.LLOAD_3, Const.LLOAD));
+ map.put("iload", precompile(Const.ILOAD_0, Const.ILOAD_3, Const.ILOAD));
+ map.put("dload", precompile(Const.DLOAD_0, Const.DLOAD_3, Const.DLOAD));
+ map.put("fload", precompile(Const.FLOAD_0, Const.FLOAD_3, Const.FLOAD));
+ map.put("aload", precompile(Const.ALOAD_0, Const.ALOAD_3, Const.ALOAD));
+ map.put("lstore", precompile(Const.LSTORE_0, Const.LSTORE_3, Const.LSTORE));
+ map.put("istore", precompile(Const.ISTORE_0, Const.ISTORE_3, Const.ISTORE));
+ map.put("dstore", precompile(Const.DSTORE_0, Const.DSTORE_3, Const.DSTORE));
+ map.put("fstore", precompile(Const.FSTORE_0, Const.FSTORE_3, Const.FSTORE));
+ map.put("astore", precompile(Const.ASTORE_0, Const.ASTORE_3, Const.ASTORE));
// Compile strings
-
- for(Iterator i = map.keySet().iterator(); i.hasNext(); ) {
- String key = (String)i.next();
- String value = (String)map.get(key);
-
- char ch = value.charAt(1); // Omit already precompiled patterns
- if(ch < OFFSET) {
+ for (final Map.Entry<String, String> entry : map.entrySet()) {
+ final String key = entry.getKey();
+ final String value = entry.getValue();
+ final char ch = value.charAt(1); // Omit already precompiled patterns
+ if (ch < OFFSET) {
map.put(key, compilePattern(value)); // precompile all patterns
}
}
-
// Add instruction alias to match anything
-
- StringBuffer buf = new StringBuffer("(");
-
- for(short i=0; i < NO_OPCODES; i++) {
- if(Constants.NO_OF_OPERANDS[i] != Constants.UNDEFINED) { // Not an invalid opcode
+ final StringBuilder buf = new StringBuilder("(");
+ for (short i = 0; i < NO_OPCODES; i++) {
+ if (Const.getNoOfOperands(i) != Const.UNDEFINED) { // Not an invalid opcode
buf.append(makeChar(i));
-
- if(i < NO_OPCODES - 1)
+ if (i < NO_OPCODES - 1) {
buf.append('|');
}
}
+ }
buf.append(')');
-
map.put("instruction", buf.toString());
}
- private static String precompile(short from, short to, short extra) {
- StringBuffer buf = new StringBuffer("(");
- for(short i=from; i <= to; i++) {
+ private static String precompile( final short from, final short to, final short extra ) {
+ final StringBuilder buf = new StringBuilder("(");
+ for (short i = from; i <= to; i++) {
buf.append(makeChar(i));
buf.append('|');
}
-
buf.append(makeChar(extra));
buf.append(")");
return buf.toString();
}
+
/*
* Internal debugging routines.
*/
- private static final String pattern2string(String pattern) {
- return pattern2string(pattern, true);
- }
-
- private static final String pattern2string(String pattern, boolean make_string) {
- StringBuffer buf = new StringBuffer();
-
- for(int i=0; i < pattern.length(); i++) {
- char ch = pattern.charAt(i);
-
- if(ch >= OFFSET) {
- if(make_string)
- buf.append(Constants.OPCODE_NAMES[ch - OFFSET]);
- else
- buf.append((int)(ch - OFFSET));
- } else
- buf.append(ch);
- }
-
- return buf.toString();
- }
+// private static final String pattern2string( String pattern ) {
+// return pattern2string(pattern, true);
+// }
+
+
+// private static final String pattern2string( String pattern, boolean make_string ) {
+// StringBuffer buf = new StringBuffer();
+// for (int i = 0; i < pattern.length(); i++) {
+// char ch = pattern.charAt(i);
+// if (ch >= OFFSET) {
+// if (make_string) {
+// buf.append(Constants.getOpcodeName(ch - OFFSET));
+// } else {
+// buf.append((ch - OFFSET));
+// }
+// } else {
+// buf.append(ch);
+// }
+// }
+// return buf.toString();
+// }
}
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