Author: mdahm
Date: Sat Dec 24 03:42:00 2005
New Revision: 358927
URL: http://svn.apache.org/viewcvs?rev=358927&view=rev
Log:
Eclipse settings added
Removed dependency from apache.regex package,
use java.util.regex instead
MD
Modified:
jakarta/bcel/trunk/examples/TransitiveHull.java
jakarta/bcel/trunk/src/java/org/apache/bcel/util/InstructionFinder.java
Modified: jakarta/bcel/trunk/examples/TransitiveHull.java
URL:
http://svn.apache.org/viewcvs/jakarta/bcel/trunk/examples/TransitiveHull.java?rev=358927&r1=358926&r2=358927&view=diff
==============================================================================
--- jakarta/bcel/trunk/examples/TransitiveHull.java (original)
+++ jakarta/bcel/trunk/examples/TransitiveHull.java Sat Dec 24 03:42:00 2005
@@ -1,191 +1,178 @@
-import org.apache.bcel.classfile.*;
-import org.apache.bcel.generic.*;
-import org.apache.bcel.util.*;
-import java.io.*;
-import java.util.*;
+import java.util.Arrays;
+import java.util.regex.Pattern;
+
import org.apache.bcel.Constants;
import org.apache.bcel.Repository;
-import org.apache.regexp.*;
+import org.apache.bcel.classfile.ClassParser;
+import org.apache.bcel.classfile.ConstantCP;
+import org.apache.bcel.classfile.ConstantClass;
+import org.apache.bcel.classfile.ConstantFieldref;
+import org.apache.bcel.classfile.ConstantInterfaceMethodref;
+import org.apache.bcel.classfile.ConstantMethodref;
+import org.apache.bcel.classfile.ConstantNameAndType;
+import org.apache.bcel.classfile.ConstantPool;
+import org.apache.bcel.classfile.JavaClass;
+import org.apache.bcel.generic.ArrayType;
+import org.apache.bcel.generic.ObjectType;
+import org.apache.bcel.generic.Type;
+import org.apache.bcel.util.ClassQueue;
+import org.apache.bcel.util.ClassSet;
/**
- * Find all classes referenced by given start class and all classes
- * referenced by those and so on. In other words: Compute the transitive
- * hull of classes used by a given class. This is done by checking all
- * ConstantClass entries and all method and field signatures.<br> This
- * may be useful in order to put all class files of an application
- * into a single JAR file, e.g..
+ * Find all classes referenced by given start class and all classes referenced
+ * by those and so on. In other words: Compute the transitive hull of classes
+ * used by a given class. This is done by checking all ConstantClass entries
and
+ * all method and field signatures.<br>
+ * This may be useful in order to put all class files of an application into a
+ * single JAR file, e.g..
* <p>
* It fails however in the presence of reflexive code aka introspection.
* <p>
- * You'll need Apache's regular expression library supplied together
- * with BCEL to use this class.
- *
+ * You'll need Apache's regular expression library supplied together with BCEL
+ * to use this class.
+ *
* @version $Id$
- * @author <A HREF="mailto:[EMAIL PROTECTED]">M. Dahm</A>
+ * @author <A HREF="mailto:[EMAIL PROTECTED]">M. Dahm</A>
*/
public class TransitiveHull extends org.apache.bcel.classfile.EmptyVisitor {
- private static class LookupFailure extends RuntimeException {
- public LookupFailure(String msg) {
- super(msg);
- }
- }
-
- private JavaClass _class;
- private ClassQueue _queue;
- private ClassSet _set;
- private ConstantPool _cp;
- private String[] _ignored = IGNORED;
-
- public static final String[] IGNORED = {
- "java[.].*",
- "javax[.].*",
- "sun[.].*",
- "sunw[.].*",
- "com[.]sun[.].*",
- "org[.]omg[.].*",
- "org[.]w3c[.].*",
- "org[.]xml[.].*",
- "net[.]jini[.].*"
- };
-
- public TransitiveHull(JavaClass clazz) {
- _queue = new ClassQueue();
- _queue.enqueue(clazz);
- _set = new ClassSet();
- _set.add(clazz);
- }
-
- public JavaClass[] getClasses() {
- return _set.toArray();
- }
-
- public String[] getClassNames() {
- return _set.getClassNames();
- }
-
- /**
- * Start traversal using DescendingVisitor pattern.
- */
- public void start() {
- while(!_queue.empty()) {
- JavaClass clazz = _queue.dequeue();
- _class = clazz;
- _cp = clazz.getConstantPool();
-
- new org.apache.bcel.classfile.DescendingVisitor(clazz, this).visit();
- }
- }
-
- private void add(String class_name) {
- class_name = class_name.replace('/', '.');
-
- try {
- for(int i = 0; i < _ignored.length; i++) {
- RE regex = new RE(_ignored[i]);
-
- if(regex.match(class_name)) {
- return; // Ihh
- }
- }
- } catch(RESyntaxException ex) {
- System.out.println(ex);
- return;
- }
-
- try {
- JavaClass clazz = Repository.lookupClass(class_name);
-
- if(_set.add(clazz)) {
- _queue.enqueue(clazz);
- }
- } catch (ClassNotFoundException e) {
- throw new LookupFailure("Missing class: " + e.toString());
- }
- }
-
- public void visitConstantClass(ConstantClass cc) {
- String class_name = (String)cc.getConstantValue(_cp);
- add(class_name);
- }
-
- private void checkType(Type type) {
- if(type instanceof ArrayType) {
- type = ((ArrayType)type).getBasicType();
- }
-
- if(type instanceof ObjectType) {
- add(((ObjectType)type).getClassName());
- }
- }
-
- private void visitRef(ConstantCP ccp, boolean method) {
- String class_name = ccp.getClass(_cp);
- add(class_name);
-
- ConstantNameAndType cnat = (ConstantNameAndType)_cp.
- getConstant(ccp.getNameAndTypeIndex(), Constants.CONSTANT_NameAndType);
-
- String signature = cnat.getSignature(_cp);
-
- if(method) {
- Type type = Type.getReturnType(signature);
-
- checkType(type);
-
- Type[] types = Type.getArgumentTypes(signature);
-
- for(int i = 0; i < types.length; i++) {
- checkType(types[i]);
- }
- } else {
- checkType(Type.getType(signature));
- }
- }
-
- public void visitConstantMethodref(ConstantMethodref cmr) {
- visitRef(cmr, true);
- }
-
- public void visitConstantInterfaceMethodref(ConstantInterfaceMethodref cimr)
{
- visitRef(cimr, true);
- }
-
- public void visitConstantFieldref(ConstantFieldref cfr) {
- visitRef(cfr, false);
- }
-
- public String[] getIgnored() {
- return _ignored;
- }
-
- /**
- * Set the value of _ignored.
- * @param v Value to assign to _ignored.
- */
- public void setIgnored(String[] v) {
- _ignored = v;
- }
-
- public static void main(String[] argv) {
- ClassParser parser=null;
- JavaClass java_class;
-
- try {
- if(argv.length == 0) {
- System.err.println("transitive: No input files specified");
- }
- else {
- if((java_class = Repository.lookupClass(argv[0])) == null) {
- java_class = new ClassParser(argv[0]).parse();
- }
-
- TransitiveHull hull = new TransitiveHull(java_class);
-
- hull.start();
- System.out.println(Arrays.asList(hull.getClassNames()));
- }
- } catch(Exception e) {
- e.printStackTrace();
- }
- }
+ private ClassQueue _queue;
+ private ClassSet
_set;
+ private ConstantPool _cp;
+ private String[]
_ignored = IGNORED;
+
+ public static final String[] IGNORED = { "java[.].*",
"javax[.].*", "sun[.].*", "sunw[.].*",
+ "com[.]sun[.].*", "org[.]omg[.].*", "org[.]w3c[.].*",
"org[.]xml[.].*", "net[.]jini[.].*" };
+
+ public TransitiveHull(JavaClass clazz) {
+ _queue = new ClassQueue();
+ _queue.enqueue(clazz);
+ _set = new ClassSet();
+ _set.add(clazz);
+ }
+
+ public JavaClass[] getClasses() {
+ return _set.toArray();
+ }
+
+ public String[] getClassNames() {
+ return _set.getClassNames();
+ }
+
+ /**
+ * Start traversal using DescendingVisitor pattern.
+ */
+ public void start() {
+ while (!_queue.empty()) {
+ JavaClass clazz = _queue.dequeue();
+ _cp = clazz.getConstantPool();
+
+ new org.apache.bcel.classfile.DescendingVisitor(clazz,
this).visit();
+ }
+ }
+
+ private void add(String class_name) {
+ class_name = class_name.replace('/', '.');
+
+ for (int i = 0; i < _ignored.length; i++) {
+ if (Pattern.matches(_ignored[i], class_name)) {
+ return;
+ }
+ }
+
+ try {
+ JavaClass clazz = Repository.lookupClass(class_name);
+
+ if (_set.add(clazz)) {
+ _queue.enqueue(clazz);
+ }
+ } catch (ClassNotFoundException e) {
+ throw new IllegalStateException("Missing class: " +
e.toString());
+ }
+ }
+
+ public void visitConstantClass(ConstantClass cc) {
+ String class_name = (String) cc.getConstantValue(_cp);
+ add(class_name);
+ }
+
+ private void checkType(Type type) {
+ if (type instanceof ArrayType) {
+ type = ((ArrayType) type).getBasicType();
+ }
+
+ if (type instanceof ObjectType) {
+ add(((ObjectType) type).getClassName());
+ }
+ }
+
+ private void visitRef(ConstantCP ccp, boolean method) {
+ String class_name = ccp.getClass(_cp);
+ add(class_name);
+
+ ConstantNameAndType cnat = (ConstantNameAndType)
_cp.getConstant(ccp.getNameAndTypeIndex(),
+ Constants.CONSTANT_NameAndType);
+
+ String signature = cnat.getSignature(_cp);
+
+ if (method) {
+ Type type = Type.getReturnType(signature);
+
+ checkType(type);
+
+ Type[] types = Type.getArgumentTypes(signature);
+
+ for (int i = 0; i < types.length; i++) {
+ checkType(types[i]);
+ }
+ } else {
+ checkType(Type.getType(signature));
+ }
+ }
+
+ public void visitConstantMethodref(ConstantMethodref cmr) {
+ visitRef(cmr, true);
+ }
+
+ public void visitConstantInterfaceMethodref(ConstantInterfaceMethodref
cimr) {
+ visitRef(cimr, true);
+ }
+
+ public void visitConstantFieldref(ConstantFieldref cfr) {
+ visitRef(cfr, false);
+ }
+
+ public String[] getIgnored() {
+ return _ignored;
+ }
+
+ /**
+ * Set the value of _ignored.
+ *
+ * @param v
+ * Value to assign to _ignored.
+ */
+ public void setIgnored(String[] v) {
+ _ignored = v;
+ }
+
+ public static void main(String[] argv) {
+ JavaClass java_class;
+
+ try {
+ if (argv.length == 0) {
+ System.err.println("transitive: No input files
specified");
+ } else {
+ if ((java_class =
Repository.lookupClass(argv[0])) == null) {
+ java_class = new
ClassParser(argv[0]).parse();
+ }
+
+ TransitiveHull hull = new
TransitiveHull(java_class);
+
+ hull.start();
+
System.out.println(Arrays.asList(hull.getClassNames()));
+ }
+ } catch (Exception e) {
+ e.printStackTrace();
+ }
+ }
}
Modified:
jakarta/bcel/trunk/src/java/org/apache/bcel/util/InstructionFinder.java
URL:
http://svn.apache.org/viewcvs/jakarta/bcel/trunk/src/java/org/apache/bcel/util/InstructionFinder.java?rev=358927&r1=358926&r2=358927&view=diff
==============================================================================
--- jakarta/bcel/trunk/src/java/org/apache/bcel/util/InstructionFinder.java
(original)
+++ jakarta/bcel/trunk/src/java/org/apache/bcel/util/InstructionFinder.java Sat
Dec 24 03:42:00 2005
@@ -13,400 +13,473 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*
- */
+ */
package org.apache.bcel.util;
-
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
import org.apache.bcel.Constants;
import org.apache.bcel.generic.ClassGenException;
import org.apache.bcel.generic.Instruction;
import org.apache.bcel.generic.InstructionHandle;
import org.apache.bcel.generic.InstructionList;
-import org.apache.regexp.RE;
-import org.apache.regexp.RESyntaxException;
-/**
- * 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/";>
+/**
+ * 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.
- *
+ *
* 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>
+ *
+ * <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 $Id$
- * @author <A HREF="mailto:[EMAIL PROTECTED]">M. Dahm</A>
+ * @author <A HREF="mailto:[EMAIL PROTECTED]">M. Dahm</A>
* @see 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 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 Map map
= new HashMap(); // Map<String,Pattern>
+
+ private InstructionList il;
+ private String
il_string;
// instruction list
+ // as string
+ private InstructionHandle[] handles;
// map instruction
+
+ // list to array
+
+ /**
+ * @param il
+ * instruction list to search for given patterns
+ */
+ public InstructionFinder(InstructionList il) {
+ this.il = il;
+ reread();
+ }
+
+ /**
+ * 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
+ handles = il.getInstructionHandles();
+
+ // Map opcodes to characters
+ 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
+ * @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)
+ return result;
+
+ for (short i = 0; i < NO_OPCODES; i++)
+ if (pattern.equals(Constants.OPCODE_NAMES[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.
+ *
+ * @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++) {
+ char ch = lower.charAt(i);
+
+ if (Character.isLetterOrDigit(ch)) {
+ StringBuffer name = new StringBuffer();
+
+ while ((Character.isLetterOrDigit(ch) || ch ==
'_') && i < size) {
+ name.append(ch);
+
+ if (++i < size)
+ ch = lower.charAt(i);
+ else
+ break;
+ }
+
+ i--;
+
+ buf.append(mapName(name.toString()));
+ } 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];
+ 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>
+ * Example pattern:
+ *
+ * <pre>
+ * 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
+ * user-defined constraints
+ * @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);
+ int start = -1;
+
+ 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 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) + 1;
+
+ InstructionHandle[] match = getMatch(startExpr,
lenExpr);
+
+ if ((constraint == null) ||
constraint.checkCode(match)) {
+ matches.add(match);
+ }
+
+ start = endExpr;
+ }
- private static final Map map = new HashMap(); // Map<String,Pattern>
+ return matches.iterator();
- private InstructionList il;
- private String il_string; // instruction list as string
- private InstructionHandle[] handles; // map instruction list to array
-
- /**
- * @param il instruction list to search for given patterns
- */
- public InstructionFinder(InstructionList il) {
- this.il = il;
- reread();
- }
-
- /**
- * 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
- handles = il.getInstructionHandles();
-
- // Map opcodes to characters
- 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
- * @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)
- return result;
-
- for(short i=0; i < NO_OPCODES; i++)
- if(pattern.equals(Constants.OPCODE_NAMES[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.
- *
- * @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++) {
- char ch = lower.charAt(i);
-
- if(Character.isLetterOrDigit(ch)) {
- StringBuffer name = new StringBuffer();
-
- while((Character.isLetterOrDigit(ch) || ch == '_') && i < size) {
- name.append(ch);
-
- if(++i < size)
- ch = lower.charAt(i);
- else
- break;
- }
-
- i--;
-
- buf.append(mapName(name.toString()));
- } 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];
- 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>
- * Example pattern:
- * <pre>
- 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
- * user-defined constraints
- * @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);
- int start = -1;
-
- 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.");
- try {
- RE regex = new RE(search);
- List matches = new ArrayList();
-
- while(start < il_string.length() && regex.match(il_string, start)) {
- int startExpr = regex.getParenStart(0);
- int endExpr = regex.getParenEnd(0);
- int lenExpr = regex.getParenLength(0);
-
- InstructionHandle[] match = getMatch(startExpr, lenExpr);
-
- if((constraint == null) || constraint.checkCode(match))
- matches.add(match);
- start = endExpr;
- }
-
- return matches.iterator();
- } catch(RESyntaxException e) {
- System.err.println(e);
- }
-
- return null;
- }
-
- /**
- * 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
- */
- public final Iterator search(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
- */
- public final Iterator search(String pattern, 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.
- *
- * @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) {
- return search(pattern, il.getStart(), constraint);
- }
-
- /**
- * Convert opcode number to char.
- */
- private static final char makeChar(short opcode) {
- return (char)(opcode + OFFSET);
- }
-
- /**
- * @return the inquired instruction list
- */
- 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.
- *
- */
- public static interface CodeConstraint {
- /**
- * @param match array of instructions matching the requested pattern
- * @return true if the matched area is really useful
- */
- public 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("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("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("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("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("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("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));
-
- // 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) {
- 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
- buf.append(makeChar(i));
-
- 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++) {
- 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);
- }
+ }
+
+ /**
+ * 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
+ */
+ public final Iterator search(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
+ */
+ public final Iterator search(String pattern, InstructionHandle from) {
+ return search(pattern, from, null);
+ }
- return buf.toString();
- }
+ /**
+ * 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
+ * @return instruction handle or `null' if the match failed
+ */
+ public final Iterator search(String pattern, CodeConstraint constraint)
{
+ return search(pattern, il.getStart(), constraint);
+ }
+
+ /**
+ * Convert opcode number to char.
+ */
+ private static final char makeChar(short opcode) {
+ return (char) (opcode + OFFSET);
+ }
+
+ /**
+ * @return the inquired instruction list
+ */
+ 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.
+ *
+ */
+ public static interface CodeConstraint {
+ /**
+ * @param match
+ * array of instructions matching the requested pattern
+ * @return true if the matched area is really useful
+ */
+ public 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(
+ "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("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("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("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(
+ "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(
+ "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));
+
+ // 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) {
+ 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
+ buf.append(makeChar(i));
+
+ 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++) {
+ 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();
+ }
}
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