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Posted to commits@tapestry.apache.org by ka...@apache.org on 2014/03/20 20:23:27 UTC
[22/23] FIXED - TAP5-2214: Make tapestry5 java8 compatible - apply
source from AMS 5.0 final source release and change package name to
org.apache.tapestry5.internal.plastic.asm. Also made a single change to ASM
source, promoted visibility of AnnotationNo
http://git-wip-us.apache.org/repos/asf/tapestry-5/blob/1acd9d22/plastic/src/external/java/org/apache/tapestry5/internal/plastic/asm/ClassReader.java
----------------------------------------------------------------------
diff --git a/plastic/src/external/java/org/apache/tapestry5/internal/plastic/asm/ClassReader.java b/plastic/src/external/java/org/apache/tapestry5/internal/plastic/asm/ClassReader.java
index 4801b61..4b9c65e 100644
--- a/plastic/src/external/java/org/apache/tapestry5/internal/plastic/asm/ClassReader.java
+++ b/plastic/src/external/java/org/apache/tapestry5/internal/plastic/asm/ClassReader.java
@@ -37,7 +37,7 @@ import java.io.InputStream;
* This class parses a byte array conforming to the Java class file format and
* calls the appropriate visit methods of a given class visitor for each field,
* method and bytecode instruction encountered.
- *
+ *
* @author Eric Bruneton
* @author Eugene Kuleshov
*/
@@ -112,9 +112,8 @@ public class ClassReader {
public final byte[] b;
/**
- * The start index of each constant pool item in {@link #b b}, plus one.
- * The one byte offset skips the constant pool item tag that indicates its
- * type.
+ * The start index of each constant pool item in {@link #b b}, plus one. The
+ * one byte offset skips the constant pool item tag that indicates its type.
*/
private final int[] items;
@@ -146,8 +145,9 @@ public class ClassReader {
/**
* Constructs a new {@link ClassReader} object.
- *
- * @param b the bytecode of the class to be read.
+ *
+ * @param b
+ * the bytecode of the class to be read.
*/
public ClassReader(final byte[] b) {
this(b, 0, b.length);
@@ -155,15 +155,18 @@ public class ClassReader {
/**
* Constructs a new {@link ClassReader} object.
- *
- * @param b the bytecode of the class to be read.
- * @param off the start offset of the class data.
- * @param len the length of the class data.
+ *
+ * @param b
+ * the bytecode of the class to be read.
+ * @param off
+ * the start offset of the class data.
+ * @param len
+ * the length of the class data.
*/
public ClassReader(final byte[] b, final int off, final int len) {
this.b = b;
// checks the class version
- if (readShort(6) > Opcodes.V1_7) {
+ if (readShort(off + 6) > Opcodes.V1_8) {
throw new IllegalArgumentException();
}
// parses the constant pool
@@ -176,35 +179,35 @@ public class ClassReader {
items[i] = index + 1;
int size;
switch (b[index]) {
- case ClassWriter.FIELD:
- case ClassWriter.METH:
- case ClassWriter.IMETH:
- case ClassWriter.INT:
- case ClassWriter.FLOAT:
- case ClassWriter.NAME_TYPE:
- case ClassWriter.INDY:
- size = 5;
- break;
- case ClassWriter.LONG:
- case ClassWriter.DOUBLE:
- size = 9;
- ++i;
- break;
- case ClassWriter.UTF8:
- size = 3 + readUnsignedShort(index + 1);
- if (size > max) {
- max = size;
- }
- break;
- case ClassWriter.HANDLE:
- size = 4;
- break;
- // case ClassWriter.CLASS:
- // case ClassWriter.STR:
- // case ClassWriter.MTYPE
- default:
- size = 3;
- break;
+ case ClassWriter.FIELD:
+ case ClassWriter.METH:
+ case ClassWriter.IMETH:
+ case ClassWriter.INT:
+ case ClassWriter.FLOAT:
+ case ClassWriter.NAME_TYPE:
+ case ClassWriter.INDY:
+ size = 5;
+ break;
+ case ClassWriter.LONG:
+ case ClassWriter.DOUBLE:
+ size = 9;
+ ++i;
+ break;
+ case ClassWriter.UTF8:
+ size = 3 + readUnsignedShort(index + 1);
+ if (size > max) {
+ max = size;
+ }
+ break;
+ case ClassWriter.HANDLE:
+ size = 4;
+ break;
+ // case ClassWriter.CLASS:
+ // case ClassWriter.STR:
+ // case ClassWriter.MTYPE
+ default:
+ size = 3;
+ break;
}
index += size;
}
@@ -217,9 +220,9 @@ public class ClassReader {
* Returns the class's access flags (see {@link Opcodes}). This value may
* not reflect Deprecated and Synthetic flags when bytecode is before 1.5
* and those flags are represented by attributes.
- *
+ *
* @return the class access flags
- *
+ *
* @see ClassVisitor#visit(int, int, String, String, String, String[])
*/
public int getAccess() {
@@ -229,9 +232,9 @@ public class ClassReader {
/**
* Returns the internal name of the class (see
* {@link Type#getInternalName() getInternalName}).
- *
+ *
* @return the internal class name
- *
+ *
* @see ClassVisitor#visit(int, int, String, String, String, String[])
*/
public String getClassName() {
@@ -242,24 +245,23 @@ public class ClassReader {
* Returns the internal of name of the super class (see
* {@link Type#getInternalName() getInternalName}). For interfaces, the
* super class is {@link Object}.
- *
+ *
* @return the internal name of super class, or <tt>null</tt> for
* {@link Object} class.
- *
+ *
* @see ClassVisitor#visit(int, int, String, String, String, String[])
*/
public String getSuperName() {
- int n = items[readUnsignedShort(header + 4)];
- return n == 0 ? null : readUTF8(n, new char[maxStringLength]);
+ return readClass(header + 4, new char[maxStringLength]);
}
/**
* Returns the internal names of the class's interfaces (see
* {@link Type#getInternalName() getInternalName}).
- *
+ *
* @return the array of internal names for all implemented interfaces or
* <tt>null</tt>.
- *
+ *
* @see ClassVisitor#visit(int, int, String, String, String, String[])
*/
public String[] getInterfaces() {
@@ -279,8 +281,9 @@ public class ClassReader {
/**
* Copies the constant pool data into the given {@link ClassWriter}. Should
* be called before the {@link #accept(ClassVisitor,int)} method.
- *
- * @param classWriter the {@link ClassWriter} to copy constant pool into.
+ *
+ * @param classWriter
+ * the {@link ClassWriter} to copy constant pool into.
*/
void copyPool(final ClassWriter classWriter) {
char[] buf = new char[maxStringLength];
@@ -292,82 +295,63 @@ public class ClassReader {
Item item = new Item(i);
int nameType;
switch (tag) {
- case ClassWriter.FIELD:
- case ClassWriter.METH:
- case ClassWriter.IMETH:
- nameType = items[readUnsignedShort(index + 2)];
- item.set(tag,
- readClass(index, buf),
- readUTF8(nameType, buf),
- readUTF8(nameType + 2, buf));
- break;
-
- case ClassWriter.INT:
- item.set(readInt(index));
- break;
-
- case ClassWriter.FLOAT:
- item.set(Float.intBitsToFloat(readInt(index)));
- break;
-
- case ClassWriter.NAME_TYPE:
- item.set(tag,
- readUTF8(index, buf),
- readUTF8(index + 2, buf),
- null);
- break;
-
- case ClassWriter.LONG:
- item.set(readLong(index));
- ++i;
- break;
-
- case ClassWriter.DOUBLE:
- item.set(Double.longBitsToDouble(readLong(index)));
- ++i;
- break;
-
- case ClassWriter.UTF8: {
- String s = strings[i];
- if (s == null) {
- index = items[i];
- s = strings[i] = readUTF(index + 2,
- readUnsignedShort(index),
- buf);
- }
- item.set(tag, s, null, null);
+ case ClassWriter.FIELD:
+ case ClassWriter.METH:
+ case ClassWriter.IMETH:
+ nameType = items[readUnsignedShort(index + 2)];
+ item.set(tag, readClass(index, buf), readUTF8(nameType, buf),
+ readUTF8(nameType + 2, buf));
+ break;
+ case ClassWriter.INT:
+ item.set(readInt(index));
+ break;
+ case ClassWriter.FLOAT:
+ item.set(Float.intBitsToFloat(readInt(index)));
+ break;
+ case ClassWriter.NAME_TYPE:
+ item.set(tag, readUTF8(index, buf), readUTF8(index + 2, buf),
+ null);
+ break;
+ case ClassWriter.LONG:
+ item.set(readLong(index));
+ ++i;
+ break;
+ case ClassWriter.DOUBLE:
+ item.set(Double.longBitsToDouble(readLong(index)));
+ ++i;
+ break;
+ case ClassWriter.UTF8: {
+ String s = strings[i];
+ if (s == null) {
+ index = items[i];
+ s = strings[i] = readUTF(index + 2,
+ readUnsignedShort(index), buf);
}
- break;
-
- case ClassWriter.HANDLE: {
- int fieldOrMethodRef = items[readUnsignedShort(index + 1)];
- nameType = items[readUnsignedShort(fieldOrMethodRef + 2)];
- item.set(ClassWriter.HANDLE_BASE + readByte(index),
- readClass(fieldOrMethodRef, buf),
- readUTF8(nameType, buf),
- readUTF8(nameType + 2, buf));
-
+ item.set(tag, s, null, null);
+ break;
+ }
+ case ClassWriter.HANDLE: {
+ int fieldOrMethodRef = items[readUnsignedShort(index + 1)];
+ nameType = items[readUnsignedShort(fieldOrMethodRef + 2)];
+ item.set(ClassWriter.HANDLE_BASE + readByte(index),
+ readClass(fieldOrMethodRef, buf),
+ readUTF8(nameType, buf), readUTF8(nameType + 2, buf));
+ break;
+ }
+ case ClassWriter.INDY:
+ if (classWriter.bootstrapMethods == null) {
+ copyBootstrapMethods(classWriter, items2, buf);
}
- break;
-
-
- case ClassWriter.INDY:
- if (classWriter.bootstrapMethods == null) {
- copyBootstrapMethods(classWriter, items2, buf);
- }
- nameType = items[readUnsignedShort(index + 2)];
- item.set(readUTF8(nameType, buf),
- readUTF8(nameType + 2, buf),
- readUnsignedShort(index));
- break;
-
-
- // case ClassWriter.STR:
- // case ClassWriter.CLASS:
- // case ClassWriter.MTYPE
- default:
- item.set(tag, readUTF8(index, buf), null, null);
- break;
+ nameType = items[readUnsignedShort(index + 2)];
+ item.set(readUTF8(nameType, buf), readUTF8(nameType + 2, buf),
+ readUnsignedShort(index));
+ break;
+ // case ClassWriter.STR:
+ // case ClassWriter.CLASS:
+ // case ClassWriter.MTYPE
+ default:
+ item.set(tag, readUTF8(index, buf), null, null);
+ break;
}
int index2 = item.hashCode % items2.length;
@@ -382,77 +366,59 @@ public class ClassReader {
classWriter.index = ll;
}
- private void copyBootstrapMethods(ClassWriter classWriter, Item[] items2, char[] buf) {
- int i, j, k, u, v;
-
- // skip class header
- v = header;
- v += 8 + (readUnsignedShort(v + 6) << 1);
-
- // skips fields and methods
- i = readUnsignedShort(v);
- v += 2;
- for (; i > 0; --i) {
- j = readUnsignedShort(v + 6);
- v += 8;
- for (; j > 0; --j) {
- v += 6 + readInt(v + 2);
+ /**
+ * Copies the bootstrap method data into the given {@link ClassWriter}.
+ * Should be called before the {@link #accept(ClassVisitor,int)} method.
+ *
+ * @param classWriter
+ * the {@link ClassWriter} to copy bootstrap methods into.
+ */
+ private void copyBootstrapMethods(final ClassWriter classWriter,
+ final Item[] items, final char[] c) {
+ // finds the "BootstrapMethods" attribute
+ int u = getAttributes();
+ boolean found = false;
+ for (int i = readUnsignedShort(u); i > 0; --i) {
+ String attrName = readUTF8(u + 2, c);
+ if ("BootstrapMethods".equals(attrName)) {
+ found = true;
+ break;
}
+ u += 6 + readInt(u + 4);
}
- i = readUnsignedShort(v);
- v += 2;
- for (; i > 0; --i) {
- j = readUnsignedShort(v + 6);
- v += 8;
- for (; j > 0; --j) {
- v += 6 + readInt(v + 2);
- }
+ if (!found) {
+ return;
}
-
- // read class attributes
- i = readUnsignedShort(v);
- v += 2;
- for (; i > 0; --i) {
- String attrName = readUTF8(v, buf);
- int size = readInt(v + 2);
- if ("BootstrapMethods".equals(attrName)) {
- int boostrapMethodCount = readUnsignedShort(v + 6);
- int x = v + 8;
- for (j = 0; j < boostrapMethodCount; j++) {
- int hashCode = readConst(readUnsignedShort(x), buf).hashCode();
- k = readUnsignedShort(x + 2);
- u = x + 4;
- for(; k > 0; --k) {
- hashCode ^= readConst(readUnsignedShort(u), buf).hashCode();
- u += 2;
- }
- Item item = new Item(j);
- item.set(x - v - 8, hashCode & 0x7FFFFFFF);
-
- int index2 = item.hashCode % items2.length;
- item.next = items2[index2];
- items2[index2] = item;
-
- x = u;
- }
-
- classWriter.bootstrapMethodsCount = boostrapMethodCount;
- ByteVector bootstrapMethods = new ByteVector(size + 62);
- bootstrapMethods.putByteArray(b, v + 8, size - 2);
- classWriter.bootstrapMethods = bootstrapMethods;
- return;
+ // copies the bootstrap methods in the class writer
+ int boostrapMethodCount = readUnsignedShort(u + 8);
+ for (int j = 0, v = u + 10; j < boostrapMethodCount; j++) {
+ int position = v - u - 10;
+ int hashCode = readConst(readUnsignedShort(v), c).hashCode();
+ for (int k = readUnsignedShort(v + 2); k > 0; --k) {
+ hashCode ^= readConst(readUnsignedShort(v + 4), c).hashCode();
+ v += 2;
}
- v += 6 + size;
+ v += 4;
+ Item item = new Item(j);
+ item.set(position, hashCode & 0x7FFFFFFF);
+ int index = item.hashCode % items.length;
+ item.next = items[index];
+ items[index] = item;
}
-
- // we are in trouble !!!
+ int attrSize = readInt(u + 4);
+ ByteVector bootstrapMethods = new ByteVector(attrSize + 62);
+ bootstrapMethods.putByteArray(b, u + 10, attrSize - 2);
+ classWriter.bootstrapMethodsCount = boostrapMethodCount;
+ classWriter.bootstrapMethods = bootstrapMethods;
}
/**
* Constructs a new {@link ClassReader} object.
- *
- * @param is an input stream from which to read the class.
- * @throws IOException if a problem occurs during reading.
+ *
+ * @param is
+ * an input stream from which to read the class.
+ * @throws IOException
+ * if a problem occurs during reading.
*/
public ClassReader(final InputStream is) throws IOException {
this(readClass(is, false));
@@ -460,26 +426,31 @@ public class ClassReader {
/**
* Constructs a new {@link ClassReader} object.
- *
- * @param name the binary qualified name of the class to be read.
- * @throws IOException if an exception occurs during reading.
+ *
+ * @param name
+ * the binary qualified name of the class to be read.
+ * @throws IOException
+ * if an exception occurs during reading.
*/
public ClassReader(final String name) throws IOException {
- this(readClass(ClassLoader.getSystemResourceAsStream(name.replace('.', '/')
- + ".class"), true));
+ this(readClass(
+ ClassLoader.getSystemResourceAsStream(name.replace('.', '/')
+ + ".class"), true));
}
/**
* Reads the bytecode of a class.
- *
- * @param is an input stream from which to read the class.
- * @param close true to close the input stream after reading.
+ *
+ * @param is
+ * an input stream from which to read the class.
+ * @param close
+ * true to close the input stream after reading.
* @return the bytecode read from the given input stream.
- * @throws IOException if a problem occurs during reading.
+ * @throws IOException
+ * if a problem occurs during reading.
*/
private static byte[] readClass(final InputStream is, boolean close)
- throws IOException
- {
+ throws IOException {
if (is == null) {
throw new IOException("Class not found");
}
@@ -520,14 +491,16 @@ public class ClassReader {
// ------------------------------------------------------------------------
/**
- * Makes the given visitor visit the Java class of this {@link ClassReader}.
- * This class is the one specified in the constructor (see
+ * Makes the given visitor visit the Java class of this {@link ClassReader}
+ * . This class is the one specified in the constructor (see
* {@link #ClassReader(byte[]) ClassReader}).
- *
- * @param classVisitor the visitor that must visit this class.
- * @param flags option flags that can be used to modify the default behavior
- * of this class. See {@link #SKIP_DEBUG}, {@link #EXPAND_FRAMES},
- * {@link #SKIP_FRAMES}, {@link #SKIP_CODE}.
+ *
+ * @param classVisitor
+ * the visitor that must visit this class.
+ * @param flags
+ * option flags that can be used to modify the default behavior
+ * of this class. See {@link #SKIP_DEBUG}, {@link #EXPAND_FRAMES}
+ * , {@link #SKIP_FRAMES}, {@link #SKIP_CODE}.
*/
public void accept(final ClassVisitor classVisitor, final int flags) {
accept(classVisitor, new Attribute[0], flags);
@@ -537,1118 +510,1220 @@ public class ClassReader {
* Makes the given visitor visit the Java class of this {@link ClassReader}.
* This class is the one specified in the constructor (see
* {@link #ClassReader(byte[]) ClassReader}).
- *
- * @param classVisitor the visitor that must visit this class.
- * @param attrs prototypes of the attributes that must be parsed during the
- * visit of the class. Any attribute whose type is not equal to the
- * type of one the prototypes will not be parsed: its byte array
- * value will be passed unchanged to the ClassWriter. <i>This may
- * corrupt it if this value contains references to the constant pool,
- * or has syntactic or semantic links with a class element that has
- * been transformed by a class adapter between the reader and the
- * writer</i>.
- * @param flags option flags that can be used to modify the default behavior
- * of this class. See {@link #SKIP_DEBUG}, {@link #EXPAND_FRAMES},
- * {@link #SKIP_FRAMES}, {@link #SKIP_CODE}.
+ *
+ * @param classVisitor
+ * the visitor that must visit this class.
+ * @param attrs
+ * prototypes of the attributes that must be parsed during the
+ * visit of the class. Any attribute whose type is not equal to
+ * the type of one the prototypes will not be parsed: its byte
+ * array value will be passed unchanged to the ClassWriter.
+ * <i>This may corrupt it if this value contains references to
+ * the constant pool, or has syntactic or semantic links with a
+ * class element that has been transformed by a class adapter
+ * between the reader and the writer</i>.
+ * @param flags
+ * option flags that can be used to modify the default behavior
+ * of this class. See {@link #SKIP_DEBUG}, {@link #EXPAND_FRAMES}
+ * , {@link #SKIP_FRAMES}, {@link #SKIP_CODE}.
*/
- public void accept(
- final ClassVisitor classVisitor,
- final Attribute[] attrs,
- final int flags)
- {
- byte[] b = this.b; // the bytecode array
+ public void accept(final ClassVisitor classVisitor,
+ final Attribute[] attrs, final int flags) {
+ int u = header; // current offset in the class file
char[] c = new char[maxStringLength]; // buffer used to read strings
- int i, j, k; // loop variables
- int u, v, w; // indexes in b
- Attribute attr;
-
- int access;
- String name;
- String desc;
- String attrName;
- String signature;
- int anns = 0;
- int ianns = 0;
- Attribute cattrs = null;
-
- // visits the header
- u = header;
- access = readUnsignedShort(u);
- name = readClass(u + 2, c);
- v = items[readUnsignedShort(u + 4)];
- String superClassName = v == 0 ? null : readUTF8(v, c);
- String[] implementedItfs = new String[readUnsignedShort(u + 6)];
- w = 0;
+
+ Context context = new Context();
+ context.attrs = attrs;
+ context.flags = flags;
+ context.buffer = c;
+
+ // reads the class declaration
+ int access = readUnsignedShort(u);
+ String name = readClass(u + 2, c);
+ String superClass = readClass(u + 4, c);
+ String[] interfaces = new String[readUnsignedShort(u + 6)];
u += 8;
- for (i = 0; i < implementedItfs.length; ++i) {
- implementedItfs[i] = readClass(u, c);
+ for (int i = 0; i < interfaces.length; ++i) {
+ interfaces[i] = readClass(u, c);
u += 2;
}
- boolean skipCode = (flags & SKIP_CODE) != 0;
- boolean skipDebug = (flags & SKIP_DEBUG) != 0;
- boolean unzip = (flags & EXPAND_FRAMES) != 0;
-
- // skips fields and methods
- v = u;
- i = readUnsignedShort(v);
- v += 2;
- for (; i > 0; --i) {
- j = readUnsignedShort(v + 6);
- v += 8;
- for (; j > 0; --j) {
- v += 6 + readInt(v + 2);
- }
- }
- i = readUnsignedShort(v);
- v += 2;
- for (; i > 0; --i) {
- j = readUnsignedShort(v + 6);
- v += 8;
- for (; j > 0; --j) {
- v += 6 + readInt(v + 2);
- }
- }
- // reads the class's attributes
- signature = null;
+ // reads the class attributes
+ String signature = null;
String sourceFile = null;
String sourceDebug = null;
String enclosingOwner = null;
String enclosingName = null;
String enclosingDesc = null;
- int[] bootstrapMethods = null; // start indexed of the bsms
-
- i = readUnsignedShort(v);
- v += 2;
- for (; i > 0; --i) {
- attrName = readUTF8(v, c);
+ int anns = 0;
+ int ianns = 0;
+ int tanns = 0;
+ int itanns = 0;
+ int innerClasses = 0;
+ Attribute attributes = null;
+
+ u = getAttributes();
+ for (int i = readUnsignedShort(u); i > 0; --i) {
+ String attrName = readUTF8(u + 2, c);
// tests are sorted in decreasing frequency order
// (based on frequencies observed on typical classes)
if ("SourceFile".equals(attrName)) {
- sourceFile = readUTF8(v + 6, c);
+ sourceFile = readUTF8(u + 8, c);
} else if ("InnerClasses".equals(attrName)) {
- w = v + 6;
+ innerClasses = u + 8;
} else if ("EnclosingMethod".equals(attrName)) {
- enclosingOwner = readClass(v + 6, c);
- int item = readUnsignedShort(v + 8);
+ enclosingOwner = readClass(u + 8, c);
+ int item = readUnsignedShort(u + 10);
if (item != 0) {
enclosingName = readUTF8(items[item], c);
enclosingDesc = readUTF8(items[item] + 2, c);
}
} else if (SIGNATURES && "Signature".equals(attrName)) {
- signature = readUTF8(v + 6, c);
- } else if (ANNOTATIONS && "RuntimeVisibleAnnotations".equals(attrName)) {
- anns = v + 6;
+ signature = readUTF8(u + 8, c);
+ } else if (ANNOTATIONS
+ && "RuntimeVisibleAnnotations".equals(attrName)) {
+ anns = u + 8;
+ } else if (ANNOTATIONS
+ && "RuntimeVisibleTypeAnnotations".equals(attrName)) {
+ tanns = u + 8;
} else if ("Deprecated".equals(attrName)) {
access |= Opcodes.ACC_DEPRECATED;
} else if ("Synthetic".equals(attrName)) {
- access |= Opcodes.ACC_SYNTHETIC | ClassWriter.ACC_SYNTHETIC_ATTRIBUTE;
+ access |= Opcodes.ACC_SYNTHETIC
+ | ClassWriter.ACC_SYNTHETIC_ATTRIBUTE;
} else if ("SourceDebugExtension".equals(attrName)) {
- int len = readInt(v + 2);
- sourceDebug = readUTF(v + 6, len, new char[len]);
- } else if (ANNOTATIONS && "RuntimeInvisibleAnnotations".equals(attrName)) {
- ianns = v + 6;
+ int len = readInt(u + 4);
+ sourceDebug = readUTF(u + 8, len, new char[len]);
+ } else if (ANNOTATIONS
+ && "RuntimeInvisibleAnnotations".equals(attrName)) {
+ ianns = u + 8;
+ } else if (ANNOTATIONS
+ && "RuntimeInvisibleTypeAnnotations".equals(attrName)) {
+ itanns = u + 8;
} else if ("BootstrapMethods".equals(attrName)) {
- int boostrapMethodCount = readUnsignedShort(v + 6);
- bootstrapMethods = new int[boostrapMethodCount];
- int x = v + 8;
- for (j = 0; j < boostrapMethodCount; j++) {
- bootstrapMethods[j] = x;
- x += 2 + readUnsignedShort(x + 2) << 1;
+ int[] bootstrapMethods = new int[readUnsignedShort(u + 8)];
+ for (int j = 0, v = u + 10; j < bootstrapMethods.length; j++) {
+ bootstrapMethods[j] = v;
+ v += 2 + readUnsignedShort(v + 2) << 1;
}
+ context.bootstrapMethods = bootstrapMethods;
} else {
- attr = readAttribute(attrs,
- attrName,
- v + 6,
- readInt(v + 2),
- c,
- -1,
- null);
+ Attribute attr = readAttribute(attrs, attrName, u + 8,
+ readInt(u + 4), c, -1, null);
if (attr != null) {
- attr.next = cattrs;
- cattrs = attr;
+ attr.next = attributes;
+ attributes = attr;
}
}
- v += 6 + readInt(v + 2);
- }
- // calls the visit method
- classVisitor.visit(readInt(4),
- access,
- name,
- signature,
- superClassName,
- implementedItfs);
-
- // calls the visitSource method
- if (!skipDebug && (sourceFile != null || sourceDebug != null)) {
+ u += 6 + readInt(u + 4);
+ }
+
+ // visits the class declaration
+ classVisitor.visit(readInt(items[1] - 7), access, name, signature,
+ superClass, interfaces);
+
+ // visits the source and debug info
+ if ((flags & SKIP_DEBUG) == 0
+ && (sourceFile != null || sourceDebug != null)) {
classVisitor.visitSource(sourceFile, sourceDebug);
}
- // calls the visitOuterClass method
+ // visits the outer class
if (enclosingOwner != null) {
- classVisitor.visitOuterClass(enclosingOwner,
- enclosingName,
+ classVisitor.visitOuterClass(enclosingOwner, enclosingName,
enclosingDesc);
}
- // visits the class annotations
- if (ANNOTATIONS) {
- for (i = 1; i >= 0; --i) {
- v = i == 0 ? ianns : anns;
- if (v != 0) {
- j = readUnsignedShort(v);
- v += 2;
- for (; j > 0; --j) {
- v = readAnnotationValues(v + 2,
- c,
- true,
- classVisitor.visitAnnotation(readUTF8(v, c), i != 0));
- }
- }
+ // visits the class annotations and type annotations
+ if (ANNOTATIONS && anns != 0) {
+ for (int i = readUnsignedShort(anns), v = anns + 2; i > 0; --i) {
+ v = readAnnotationValues(v + 2, c, true,
+ classVisitor.visitAnnotation(readUTF8(v, c), true));
+ }
+ }
+ if (ANNOTATIONS && ianns != 0) {
+ for (int i = readUnsignedShort(ianns), v = ianns + 2; i > 0; --i) {
+ v = readAnnotationValues(v + 2, c, true,
+ classVisitor.visitAnnotation(readUTF8(v, c), false));
+ }
+ }
+ if (ANNOTATIONS && tanns != 0) {
+ for (int i = readUnsignedShort(tanns), v = tanns + 2; i > 0; --i) {
+ v = readAnnotationTarget(context, v);
+ v = readAnnotationValues(v + 2, c, true,
+ classVisitor.visitTypeAnnotation(context.typeRef,
+ context.typePath, readUTF8(v, c), true));
+ }
+ }
+ if (ANNOTATIONS && itanns != 0) {
+ for (int i = readUnsignedShort(itanns), v = itanns + 2; i > 0; --i) {
+ v = readAnnotationTarget(context, v);
+ v = readAnnotationValues(v + 2, c, true,
+ classVisitor.visitTypeAnnotation(context.typeRef,
+ context.typePath, readUTF8(v, c), false));
}
}
- // visits the class attributes
- while (cattrs != null) {
- attr = cattrs.next;
- cattrs.next = null;
- classVisitor.visitAttribute(cattrs);
- cattrs = attr;
+ // visits the attributes
+ while (attributes != null) {
+ Attribute attr = attributes.next;
+ attributes.next = null;
+ classVisitor.visitAttribute(attributes);
+ attributes = attr;
}
- // calls the visitInnerClass method
- if (w != 0) {
- i = readUnsignedShort(w);
- w += 2;
- for (; i > 0; --i) {
- classVisitor.visitInnerClass(readUnsignedShort(w) == 0
- ? null
- : readClass(w, c), readUnsignedShort(w + 2) == 0
- ? null
- : readClass(w + 2, c), readUnsignedShort(w + 4) == 0
- ? null
- : readUTF8(w + 4, c), readUnsignedShort(w + 6));
- w += 8;
+ // visits the inner classes
+ if (innerClasses != 0) {
+ int v = innerClasses + 2;
+ for (int i = readUnsignedShort(innerClasses); i > 0; --i) {
+ classVisitor.visitInnerClass(readClass(v, c),
+ readClass(v + 2, c), readUTF8(v + 4, c),
+ readUnsignedShort(v + 6));
+ v += 8;
}
}
- // visits the fields
- i = readUnsignedShort(u);
+ // visits the fields and methods
+ u = header + 10 + 2 * interfaces.length;
+ for (int i = readUnsignedShort(u - 2); i > 0; --i) {
+ u = readField(classVisitor, context, u);
+ }
u += 2;
- for (; i > 0; --i) {
- access = readUnsignedShort(u);
- name = readUTF8(u + 2, c);
- desc = readUTF8(u + 4, c);
- // visits the field's attributes and looks for a ConstantValue
- // attribute
- int fieldValueItem = 0;
- signature = null;
- anns = 0;
- ianns = 0;
- cattrs = null;
-
- j = readUnsignedShort(u + 6);
- u += 8;
- for (; j > 0; --j) {
- attrName = readUTF8(u, c);
- // tests are sorted in decreasing frequency order
- // (based on frequencies observed on typical classes)
- if ("ConstantValue".equals(attrName)) {
- fieldValueItem = readUnsignedShort(u + 6);
- } else if (SIGNATURES && "Signature".equals(attrName)) {
- signature = readUTF8(u + 6, c);
- } else if ("Deprecated".equals(attrName)) {
- access |= Opcodes.ACC_DEPRECATED;
- } else if ("Synthetic".equals(attrName)) {
- access |= Opcodes.ACC_SYNTHETIC | ClassWriter.ACC_SYNTHETIC_ATTRIBUTE;
- } else if (ANNOTATIONS && "RuntimeVisibleAnnotations".equals(attrName)) {
- anns = u + 6;
- } else if (ANNOTATIONS && "RuntimeInvisibleAnnotations".equals(attrName)) {
- ianns = u + 6;
- } else {
- attr = readAttribute(attrs,
- attrName,
- u + 6,
- readInt(u + 2),
- c,
- -1,
- null);
- if (attr != null) {
- attr.next = cattrs;
- cattrs = attr;
- }
+ for (int i = readUnsignedShort(u - 2); i > 0; --i) {
+ u = readMethod(classVisitor, context, u);
+ }
+
+ // visits the end of the class
+ classVisitor.visitEnd();
+ }
+
+ /**
+ * Reads a field and makes the given visitor visit it.
+ *
+ * @param classVisitor
+ * the visitor that must visit the field.
+ * @param context
+ * information about the class being parsed.
+ * @param u
+ * the start offset of the field in the class file.
+ * @return the offset of the first byte following the field in the class.
+ */
+ private int readField(final ClassVisitor classVisitor,
+ final Context context, int u) {
+ // reads the field declaration
+ char[] c = context.buffer;
+ int access = readUnsignedShort(u);
+ String name = readUTF8(u + 2, c);
+ String desc = readUTF8(u + 4, c);
+ u += 6;
+
+ // reads the field attributes
+ String signature = null;
+ int anns = 0;
+ int ianns = 0;
+ int tanns = 0;
+ int itanns = 0;
+ Object value = null;
+ Attribute attributes = null;
+
+ for (int i = readUnsignedShort(u); i > 0; --i) {
+ String attrName = readUTF8(u + 2, c);
+ // tests are sorted in decreasing frequency order
+ // (based on frequencies observed on typical classes)
+ if ("ConstantValue".equals(attrName)) {
+ int item = readUnsignedShort(u + 8);
+ value = item == 0 ? null : readConst(item, c);
+ } else if (SIGNATURES && "Signature".equals(attrName)) {
+ signature = readUTF8(u + 8, c);
+ } else if ("Deprecated".equals(attrName)) {
+ access |= Opcodes.ACC_DEPRECATED;
+ } else if ("Synthetic".equals(attrName)) {
+ access |= Opcodes.ACC_SYNTHETIC
+ | ClassWriter.ACC_SYNTHETIC_ATTRIBUTE;
+ } else if (ANNOTATIONS
+ && "RuntimeVisibleAnnotations".equals(attrName)) {
+ anns = u + 8;
+ } else if (ANNOTATIONS
+ && "RuntimeVisibleTypeAnnotations".equals(attrName)) {
+ tanns = u + 8;
+ } else if (ANNOTATIONS
+ && "RuntimeInvisibleAnnotations".equals(attrName)) {
+ ianns = u + 8;
+ } else if (ANNOTATIONS
+ && "RuntimeInvisibleTypeAnnotations".equals(attrName)) {
+ itanns = u + 8;
+ } else {
+ Attribute attr = readAttribute(context.attrs, attrName, u + 8,
+ readInt(u + 4), c, -1, null);
+ if (attr != null) {
+ attr.next = attributes;
+ attributes = attr;
}
- u += 6 + readInt(u + 2);
}
- // visits the field
- FieldVisitor fv = classVisitor.visitField(access,
- name,
- desc,
- signature,
- fieldValueItem == 0 ? null : readConst(fieldValueItem, c));
- // visits the field annotations and attributes
- if (fv != null) {
- if (ANNOTATIONS) {
- for (j = 1; j >= 0; --j) {
- v = j == 0 ? ianns : anns;
- if (v != 0) {
- k = readUnsignedShort(v);
- v += 2;
- for (; k > 0; --k) {
- v = readAnnotationValues(v + 2,
- c,
- true,
- fv.visitAnnotation(readUTF8(v, c), j != 0));
- }
- }
- }
- }
- while (cattrs != null) {
- attr = cattrs.next;
- cattrs.next = null;
- fv.visitAttribute(cattrs);
- cattrs = attr;
- }
- fv.visitEnd();
+ u += 6 + readInt(u + 4);
+ }
+ u += 2;
+
+ // visits the field declaration
+ FieldVisitor fv = classVisitor.visitField(access, name, desc,
+ signature, value);
+ if (fv == null) {
+ return u;
+ }
+
+ // visits the field annotations and type annotations
+ if (ANNOTATIONS && anns != 0) {
+ for (int i = readUnsignedShort(anns), v = anns + 2; i > 0; --i) {
+ v = readAnnotationValues(v + 2, c, true,
+ fv.visitAnnotation(readUTF8(v, c), true));
+ }
+ }
+ if (ANNOTATIONS && ianns != 0) {
+ for (int i = readUnsignedShort(ianns), v = ianns + 2; i > 0; --i) {
+ v = readAnnotationValues(v + 2, c, true,
+ fv.visitAnnotation(readUTF8(v, c), false));
+ }
+ }
+ if (ANNOTATIONS && tanns != 0) {
+ for (int i = readUnsignedShort(tanns), v = tanns + 2; i > 0; --i) {
+ v = readAnnotationTarget(context, v);
+ v = readAnnotationValues(v + 2, c, true,
+ fv.visitTypeAnnotation(context.typeRef,
+ context.typePath, readUTF8(v, c), true));
+ }
+ }
+ if (ANNOTATIONS && itanns != 0) {
+ for (int i = readUnsignedShort(itanns), v = itanns + 2; i > 0; --i) {
+ v = readAnnotationTarget(context, v);
+ v = readAnnotationValues(v + 2, c, true,
+ fv.visitTypeAnnotation(context.typeRef,
+ context.typePath, readUTF8(v, c), false));
}
}
- // visits the methods
- i = readUnsignedShort(u);
- u += 2;
- for (; i > 0; --i) {
- int u0 = u + 6;
- access = readUnsignedShort(u);
- name = readUTF8(u + 2, c);
- desc = readUTF8(u + 4, c);
- signature = null;
- anns = 0;
- ianns = 0;
- int dann = 0;
- int mpanns = 0;
- int impanns = 0;
- cattrs = null;
- v = 0;
- w = 0;
-
- // looks for Code and Exceptions attributes
- j = readUnsignedShort(u + 6);
- u += 8;
- for (; j > 0; --j) {
- attrName = readUTF8(u, c);
- int attrSize = readInt(u + 2);
- u += 6;
- // tests are sorted in decreasing frequency order
- // (based on frequencies observed on typical classes)
- if ("Code".equals(attrName)) {
- if (!skipCode) {
- v = u;
- }
- } else if ("Exceptions".equals(attrName)) {
- w = u;
- } else if (SIGNATURES && "Signature".equals(attrName)) {
- signature = readUTF8(u, c);
- } else if ("Deprecated".equals(attrName)) {
- access |= Opcodes.ACC_DEPRECATED;
- } else if (ANNOTATIONS && "RuntimeVisibleAnnotations".equals(attrName)) {
- anns = u;
- } else if (ANNOTATIONS && "AnnotationDefault".equals(attrName)) {
- dann = u;
- } else if ("Synthetic".equals(attrName)) {
- access |= Opcodes.ACC_SYNTHETIC | ClassWriter.ACC_SYNTHETIC_ATTRIBUTE;
- } else if (ANNOTATIONS && "RuntimeInvisibleAnnotations".equals(attrName)) {
- ianns = u;
- } else if (ANNOTATIONS && "RuntimeVisibleParameterAnnotations".equals(attrName))
- {
- mpanns = u;
- } else if (ANNOTATIONS && "RuntimeInvisibleParameterAnnotations".equals(attrName))
- {
- impanns = u;
- } else {
- attr = readAttribute(attrs,
- attrName,
- u,
- attrSize,
- c,
- -1,
- null);
- if (attr != null) {
- attr.next = cattrs;
- cattrs = attr;
- }
+ // visits the field attributes
+ while (attributes != null) {
+ Attribute attr = attributes.next;
+ attributes.next = null;
+ fv.visitAttribute(attributes);
+ attributes = attr;
+ }
+
+ // visits the end of the field
+ fv.visitEnd();
+
+ return u;
+ }
+
+ /**
+ * Reads a method and makes the given visitor visit it.
+ *
+ * @param classVisitor
+ * the visitor that must visit the method.
+ * @param context
+ * information about the class being parsed.
+ * @param u
+ * the start offset of the method in the class file.
+ * @return the offset of the first byte following the method in the class.
+ */
+ private int readMethod(final ClassVisitor classVisitor,
+ final Context context, int u) {
+ // reads the method declaration
+ char[] c = context.buffer;
+ context.access = readUnsignedShort(u);
+ context.name = readUTF8(u + 2, c);
+ context.desc = readUTF8(u + 4, c);
+ u += 6;
+
+ // reads the method attributes
+ int code = 0;
+ int exception = 0;
+ String[] exceptions = null;
+ String signature = null;
+ int methodParameters = 0;
+ int anns = 0;
+ int ianns = 0;
+ int tanns = 0;
+ int itanns = 0;
+ int dann = 0;
+ int mpanns = 0;
+ int impanns = 0;
+ int firstAttribute = u;
+ Attribute attributes = null;
+
+ for (int i = readUnsignedShort(u); i > 0; --i) {
+ String attrName = readUTF8(u + 2, c);
+ // tests are sorted in decreasing frequency order
+ // (based on frequencies observed on typical classes)
+ if ("Code".equals(attrName)) {
+ if ((context.flags & SKIP_CODE) == 0) {
+ code = u + 8;
}
- u += attrSize;
- }
- // reads declared exceptions
- String[] exceptions;
- if (w == 0) {
- exceptions = null;
+ } else if ("Exceptions".equals(attrName)) {
+ exceptions = new String[readUnsignedShort(u + 8)];
+ exception = u + 10;
+ for (int j = 0; j < exceptions.length; ++j) {
+ exceptions[j] = readClass(exception, c);
+ exception += 2;
+ }
+ } else if (SIGNATURES && "Signature".equals(attrName)) {
+ signature = readUTF8(u + 8, c);
+ } else if ("Deprecated".equals(attrName)) {
+ context.access |= Opcodes.ACC_DEPRECATED;
+ } else if (ANNOTATIONS
+ && "RuntimeVisibleAnnotations".equals(attrName)) {
+ anns = u + 8;
+ } else if (ANNOTATIONS
+ && "RuntimeVisibleTypeAnnotations".equals(attrName)) {
+ tanns = u + 8;
+ } else if (ANNOTATIONS && "AnnotationDefault".equals(attrName)) {
+ dann = u + 8;
+ } else if ("Synthetic".equals(attrName)) {
+ context.access |= Opcodes.ACC_SYNTHETIC
+ | ClassWriter.ACC_SYNTHETIC_ATTRIBUTE;
+ } else if (ANNOTATIONS
+ && "RuntimeInvisibleAnnotations".equals(attrName)) {
+ ianns = u + 8;
+ } else if (ANNOTATIONS
+ && "RuntimeInvisibleTypeAnnotations".equals(attrName)) {
+ itanns = u + 8;
+ } else if (ANNOTATIONS
+ && "RuntimeVisibleParameterAnnotations".equals(attrName)) {
+ mpanns = u + 8;
+ } else if (ANNOTATIONS
+ && "RuntimeInvisibleParameterAnnotations".equals(attrName)) {
+ impanns = u + 8;
+ } else if ("MethodParameters".equals(attrName)) {
+ methodParameters = u + 8;
} else {
- exceptions = new String[readUnsignedShort(w)];
- w += 2;
- for (j = 0; j < exceptions.length; ++j) {
- exceptions[j] = readClass(w, c);
- w += 2;
+ Attribute attr = readAttribute(context.attrs, attrName, u + 8,
+ readInt(u + 4), c, -1, null);
+ if (attr != null) {
+ attr.next = attributes;
+ attributes = attr;
}
}
+ u += 6 + readInt(u + 4);
+ }
+ u += 2;
- // visits the method's code, if any
- MethodVisitor mv = classVisitor.visitMethod(access,
- name,
- desc,
- signature,
- exceptions);
+ // visits the method declaration
+ MethodVisitor mv = classVisitor.visitMethod(context.access,
+ context.name, context.desc, signature, exceptions);
+ if (mv == null) {
+ return u;
+ }
- if (mv != null) {
- /*
- * if the returned MethodVisitor is in fact a MethodWriter, it
- * means there is no method adapter between the reader and the
- * writer. If, in addition, the writer's constant pool was
- * copied from this reader (mw.cw.cr == this), and the signature
- * and exceptions of the method have not been changed, then it
- * is possible to skip all visit events and just copy the
- * original code of the method to the writer (the access, name
- * and descriptor can have been changed, this is not important
- * since they are not copied as is from the reader).
- */
- if (WRITER && mv instanceof MethodWriter) {
- MethodWriter mw = (MethodWriter) mv;
- if (mw.cw.cr == this) {
- if (signature == mw.signature) {
- boolean sameExceptions = false;
- if (exceptions == null) {
- sameExceptions = mw.exceptionCount == 0;
- } else {
- if (exceptions.length == mw.exceptionCount) {
- sameExceptions = true;
- for (j = exceptions.length - 1; j >= 0; --j)
- {
- w -= 2;
- if (mw.exceptions[j] != readUnsignedShort(w))
- {
- sameExceptions = false;
- break;
- }
- }
- }
- }
- if (sameExceptions) {
- /*
- * we do not copy directly the code into
- * MethodWriter to save a byte array copy
- * operation. The real copy will be done in
- * ClassWriter.toByteArray().
- */
- mw.classReaderOffset = u0;
- mw.classReaderLength = u - u0;
- continue;
- }
+ /*
+ * if the returned MethodVisitor is in fact a MethodWriter, it means
+ * there is no method adapter between the reader and the writer. If, in
+ * addition, the writer's constant pool was copied from this reader
+ * (mw.cw.cr == this), and the signature and exceptions of the method
+ * have not been changed, then it is possible to skip all visit events
+ * and just copy the original code of the method to the writer (the
+ * access, name and descriptor can have been changed, this is not
+ * important since they are not copied as is from the reader).
+ */
+ if (WRITER && mv instanceof MethodWriter) {
+ MethodWriter mw = (MethodWriter) mv;
+ if (mw.cw.cr == this && signature == mw.signature) {
+ boolean sameExceptions = false;
+ if (exceptions == null) {
+ sameExceptions = mw.exceptionCount == 0;
+ } else if (exceptions.length == mw.exceptionCount) {
+ sameExceptions = true;
+ for (int j = exceptions.length - 1; j >= 0; --j) {
+ exception -= 2;
+ if (mw.exceptions[j] != readUnsignedShort(exception)) {
+ sameExceptions = false;
+ break;
}
}
}
-
- if (ANNOTATIONS && dann != 0) {
- AnnotationVisitor dv = mv.visitAnnotationDefault();
- readAnnotationValue(dann, c, null, dv);
- if (dv != null) {
- dv.visitEnd();
- }
- }
- if (ANNOTATIONS) {
- for (j = 1; j >= 0; --j) {
- w = j == 0 ? ianns : anns;
- if (w != 0) {
- k = readUnsignedShort(w);
- w += 2;
- for (; k > 0; --k) {
- w = readAnnotationValues(w + 2,
- c,
- true,
- mv.visitAnnotation(readUTF8(w, c), j != 0));
- }
- }
- }
+ if (sameExceptions) {
+ /*
+ * we do not copy directly the code into MethodWriter to
+ * save a byte array copy operation. The real copy will be
+ * done in ClassWriter.toByteArray().
+ */
+ mw.classReaderOffset = firstAttribute;
+ mw.classReaderLength = u - firstAttribute;
+ return u;
}
- if (ANNOTATIONS && mpanns != 0) {
- readParameterAnnotations(mpanns, desc, c, true, mv);
+ }
+ }
+
+ // visit the method parameters
+ if (methodParameters != 0) {
+ for (int i = b[methodParameters] & 0xFF, v = methodParameters + 1; i > 0; --i, v = v + 4) {
+ mv.visitParameter(readUTF8(v, c), readUnsignedShort(v + 2));
+ }
+ }
+
+ // visits the method annotations
+ if (ANNOTATIONS && dann != 0) {
+ AnnotationVisitor dv = mv.visitAnnotationDefault();
+ readAnnotationValue(dann, c, null, dv);
+ if (dv != null) {
+ dv.visitEnd();
+ }
+ }
+ if (ANNOTATIONS && anns != 0) {
+ for (int i = readUnsignedShort(anns), v = anns + 2; i > 0; --i) {
+ v = readAnnotationValues(v + 2, c, true,
+ mv.visitAnnotation(readUTF8(v, c), true));
+ }
+ }
+ if (ANNOTATIONS && ianns != 0) {
+ for (int i = readUnsignedShort(ianns), v = ianns + 2; i > 0; --i) {
+ v = readAnnotationValues(v + 2, c, true,
+ mv.visitAnnotation(readUTF8(v, c), false));
+ }
+ }
+ if (ANNOTATIONS && tanns != 0) {
+ for (int i = readUnsignedShort(tanns), v = tanns + 2; i > 0; --i) {
+ v = readAnnotationTarget(context, v);
+ v = readAnnotationValues(v + 2, c, true,
+ mv.visitTypeAnnotation(context.typeRef,
+ context.typePath, readUTF8(v, c), true));
+ }
+ }
+ if (ANNOTATIONS && itanns != 0) {
+ for (int i = readUnsignedShort(itanns), v = itanns + 2; i > 0; --i) {
+ v = readAnnotationTarget(context, v);
+ v = readAnnotationValues(v + 2, c, true,
+ mv.visitTypeAnnotation(context.typeRef,
+ context.typePath, readUTF8(v, c), false));
+ }
+ }
+ if (ANNOTATIONS && mpanns != 0) {
+ readParameterAnnotations(mv, context, mpanns, true);
+ }
+ if (ANNOTATIONS && impanns != 0) {
+ readParameterAnnotations(mv, context, impanns, false);
+ }
+
+ // visits the method attributes
+ while (attributes != null) {
+ Attribute attr = attributes.next;
+ attributes.next = null;
+ mv.visitAttribute(attributes);
+ attributes = attr;
+ }
+
+ // visits the method code
+ if (code != 0) {
+ mv.visitCode();
+ readCode(mv, context, code);
+ }
+
+ // visits the end of the method
+ mv.visitEnd();
+
+ return u;
+ }
+
+ /**
+ * Reads the bytecode of a method and makes the given visitor visit it.
+ *
+ * @param mv
+ * the visitor that must visit the method's code.
+ * @param context
+ * information about the class being parsed.
+ * @param u
+ * the start offset of the code attribute in the class file.
+ */
+ private void readCode(final MethodVisitor mv, final Context context, int u) {
+ // reads the header
+ byte[] b = this.b;
+ char[] c = context.buffer;
+ int maxStack = readUnsignedShort(u);
+ int maxLocals = readUnsignedShort(u + 2);
+ int codeLength = readInt(u + 4);
+ u += 8;
+
+ // reads the bytecode to find the labels
+ int codeStart = u;
+ int codeEnd = u + codeLength;
+ Label[] labels = context.labels = new Label[codeLength + 2];
+ readLabel(codeLength + 1, labels);
+ while (u < codeEnd) {
+ int offset = u - codeStart;
+ int opcode = b[u] & 0xFF;
+ switch (ClassWriter.TYPE[opcode]) {
+ case ClassWriter.NOARG_INSN:
+ case ClassWriter.IMPLVAR_INSN:
+ u += 1;
+ break;
+ case ClassWriter.LABEL_INSN:
+ readLabel(offset + readShort(u + 1), labels);
+ u += 3;
+ break;
+ case ClassWriter.LABELW_INSN:
+ readLabel(offset + readInt(u + 1), labels);
+ u += 5;
+ break;
+ case ClassWriter.WIDE_INSN:
+ opcode = b[u + 1] & 0xFF;
+ if (opcode == Opcodes.IINC) {
+ u += 6;
+ } else {
+ u += 4;
}
- if (ANNOTATIONS && impanns != 0) {
- readParameterAnnotations(impanns, desc, c, false, mv);
+ break;
+ case ClassWriter.TABL_INSN:
+ // skips 0 to 3 padding bytes
+ u = u + 4 - (offset & 3);
+ // reads instruction
+ readLabel(offset + readInt(u), labels);
+ for (int i = readInt(u + 8) - readInt(u + 4) + 1; i > 0; --i) {
+ readLabel(offset + readInt(u + 12), labels);
+ u += 4;
}
- while (cattrs != null) {
- attr = cattrs.next;
- cattrs.next = null;
- mv.visitAttribute(cattrs);
- cattrs = attr;
+ u += 12;
+ break;
+ case ClassWriter.LOOK_INSN:
+ // skips 0 to 3 padding bytes
+ u = u + 4 - (offset & 3);
+ // reads instruction
+ readLabel(offset + readInt(u), labels);
+ for (int i = readInt(u + 4); i > 0; --i) {
+ readLabel(offset + readInt(u + 12), labels);
+ u += 8;
}
+ u += 8;
+ break;
+ case ClassWriter.VAR_INSN:
+ case ClassWriter.SBYTE_INSN:
+ case ClassWriter.LDC_INSN:
+ u += 2;
+ break;
+ case ClassWriter.SHORT_INSN:
+ case ClassWriter.LDCW_INSN:
+ case ClassWriter.FIELDORMETH_INSN:
+ case ClassWriter.TYPE_INSN:
+ case ClassWriter.IINC_INSN:
+ u += 3;
+ break;
+ case ClassWriter.ITFMETH_INSN:
+ case ClassWriter.INDYMETH_INSN:
+ u += 5;
+ break;
+ // case MANA_INSN:
+ default:
+ u += 4;
+ break;
}
+ }
- if (mv != null && v != 0) {
- int maxStack = readUnsignedShort(v);
- int maxLocals = readUnsignedShort(v + 2);
- int codeLength = readInt(v + 4);
- v += 8;
+ // reads the try catch entries to find the labels, and also visits them
+ for (int i = readUnsignedShort(u); i > 0; --i) {
+ Label start = readLabel(readUnsignedShort(u + 2), labels);
+ Label end = readLabel(readUnsignedShort(u + 4), labels);
+ Label handler = readLabel(readUnsignedShort(u + 6), labels);
+ String type = readUTF8(items[readUnsignedShort(u + 8)], c);
+ mv.visitTryCatchBlock(start, end, handler, type);
+ u += 8;
+ }
+ u += 2;
- int codeStart = v;
- int codeEnd = v + codeLength;
-
- mv.visitCode();
-
- // 1st phase: finds the labels
- int label;
- Label[] labels = new Label[codeLength + 2];
- readLabel(codeLength + 1, labels);
- while (v < codeEnd) {
- w = v - codeStart;
- int opcode = b[v] & 0xFF;
- switch (ClassWriter.TYPE[opcode]) {
- case ClassWriter.NOARG_INSN:
- case ClassWriter.IMPLVAR_INSN:
- v += 1;
- break;
- case ClassWriter.LABEL_INSN:
- readLabel(w + readShort(v + 1), labels);
- v += 3;
- break;
- case ClassWriter.LABELW_INSN:
- readLabel(w + readInt(v + 1), labels);
- v += 5;
- break;
- case ClassWriter.WIDE_INSN:
- opcode = b[v + 1] & 0xFF;
- if (opcode == Opcodes.IINC) {
- v += 6;
- } else {
- v += 4;
- }
- break;
- case ClassWriter.TABL_INSN:
- // skips 0 to 3 padding bytes*
- v = v + 4 - (w & 3);
- // reads instruction
- readLabel(w + readInt(v), labels);
- j = readInt(v + 8) - readInt(v + 4) + 1;
- v += 12;
- for (; j > 0; --j) {
- readLabel(w + readInt(v), labels);
- v += 4;
- }
- break;
- case ClassWriter.LOOK_INSN:
- // skips 0 to 3 padding bytes*
- v = v + 4 - (w & 3);
- // reads instruction
- readLabel(w + readInt(v), labels);
- j = readInt(v + 4);
- v += 8;
- for (; j > 0; --j) {
- readLabel(w + readInt(v + 4), labels);
- v += 8;
- }
- break;
- case ClassWriter.VAR_INSN:
- case ClassWriter.SBYTE_INSN:
- case ClassWriter.LDC_INSN:
- v += 2;
- break;
- case ClassWriter.SHORT_INSN:
- case ClassWriter.LDCW_INSN:
- case ClassWriter.FIELDORMETH_INSN:
- case ClassWriter.TYPE_INSN:
- case ClassWriter.IINC_INSN:
- v += 3;
- break;
- case ClassWriter.ITFMETH_INSN:
- case ClassWriter.INDYMETH_INSN:
- v += 5;
- break;
- // case MANA_INSN:
- default:
- v += 4;
- break;
- }
- }
- // parses the try catch entries
- j = readUnsignedShort(v);
- v += 2;
- for (; j > 0; --j) {
- Label start = readLabel(readUnsignedShort(v), labels);
- Label end = readLabel(readUnsignedShort(v + 2), labels);
- Label handler = readLabel(readUnsignedShort(v + 4), labels);
- int type = readUnsignedShort(v + 6);
- if (type == 0) {
- mv.visitTryCatchBlock(start, end, handler, null);
- } else {
- mv.visitTryCatchBlock(start,
- end,
- handler,
- readUTF8(items[type], c));
- }
- v += 8;
- }
- // parses the local variable, line number tables, and code
- // attributes
- int varTable = 0;
- int varTypeTable = 0;
- int stackMap = 0;
- int stackMapSize = 0;
- int frameCount = 0;
- int frameMode = 0;
- int frameOffset = 0;
- int frameLocalCount = 0;
- int frameLocalDiff = 0;
- int frameStackCount = 0;
- Object[] frameLocal = null;
- Object[] frameStack = null;
- boolean zip = true;
- cattrs = null;
- j = readUnsignedShort(v);
- v += 2;
- for (; j > 0; --j) {
- attrName = readUTF8(v, c);
- if ("LocalVariableTable".equals(attrName)) {
- if (!skipDebug) {
- varTable = v + 6;
- k = readUnsignedShort(v + 6);
- w = v + 8;
- for (; k > 0; --k) {
- label = readUnsignedShort(w);
- if (labels[label] == null) {
- readLabel(label, labels).status |= Label.DEBUG;
- }
- label += readUnsignedShort(w + 2);
- if (labels[label] == null) {
- readLabel(label, labels).status |= Label.DEBUG;
- }
- w += 10;
- }
- }
- } else if ("LocalVariableTypeTable".equals(attrName)) {
- varTypeTable = v + 6;
- } else if ("LineNumberTable".equals(attrName)) {
- if (!skipDebug) {
- k = readUnsignedShort(v + 6);
- w = v + 8;
- for (; k > 0; --k) {
- label = readUnsignedShort(w);
- if (labels[label] == null) {
- readLabel(label, labels).status |= Label.DEBUG;
- }
- labels[label].line = readUnsignedShort(w + 2);
- w += 4;
- }
- }
- } else if (FRAMES && "StackMapTable".equals(attrName)) {
- if ((flags & SKIP_FRAMES) == 0) {
- stackMap = v + 8;
- stackMapSize = readInt(v + 2);
- frameCount = readUnsignedShort(v + 6);
+ // reads the code attributes
+ int[] tanns = null; // start index of each visible type annotation
+ int[] itanns = null; // start index of each invisible type annotation
+ int tann = 0; // current index in tanns array
+ int itann = 0; // current index in itanns array
+ int ntoff = -1; // next visible type annotation code offset
+ int nitoff = -1; // next invisible type annotation code offset
+ int varTable = 0;
+ int varTypeTable = 0;
+ boolean zip = true;
+ boolean unzip = (context.flags & EXPAND_FRAMES) != 0;
+ int stackMap = 0;
+ int stackMapSize = 0;
+ int frameCount = 0;
+ Context frame = null;
+ Attribute attributes = null;
+
+ for (int i = readUnsignedShort(u); i > 0; --i) {
+ String attrName = readUTF8(u + 2, c);
+ if ("LocalVariableTable".equals(attrName)) {
+ if ((context.flags & SKIP_DEBUG) == 0) {
+ varTable = u + 8;
+ for (int j = readUnsignedShort(u + 8), v = u; j > 0; --j) {
+ int label = readUnsignedShort(v + 10);
+ if (labels[label] == null) {
+ readLabel(label, labels).status |= Label.DEBUG;
}
- /*
- * here we do not extract the labels corresponding to
- * the attribute content. This would require a full
- * parsing of the attribute, which would need to be
- * repeated in the second phase (see below). Instead the
- * content of the attribute is read one frame at a time
- * (i.e. after a frame has been visited, the next frame
- * is read), and the labels it contains are also
- * extracted one frame at a time. Thanks to the ordering
- * of frames, having only a "one frame lookahead" is not
- * a problem, i.e. it is not possible to see an offset
- * smaller than the offset of the current insn and for
- * which no Label exist.
- */
- /*
- * This is not true for UNINITIALIZED type offsets. We
- * solve this by parsing the stack map table without a
- * full decoding (see below).
- */
- } else if (FRAMES && "StackMap".equals(attrName)) {
- if ((flags & SKIP_FRAMES) == 0) {
- stackMap = v + 8;
- stackMapSize = readInt(v + 2);
- frameCount = readUnsignedShort(v + 6);
- zip = false;
- }
- /*
- * IMPORTANT! here we assume that the frames are
- * ordered, as in the StackMapTable attribute, although
- * this is not guaranteed by the attribute format.
- */
- } else {
- for (k = 0; k < attrs.length; ++k) {
- if (attrs[k].type.equals(attrName)) {
- attr = attrs[k].read(this,
- v + 6,
- readInt(v + 2),
- c,
- codeStart - 8,
- labels);
- if (attr != null) {
- attr.next = cattrs;
- cattrs = attr;
- }
- }
+ label += readUnsignedShort(v + 12);
+ if (labels[label] == null) {
+ readLabel(label, labels).status |= Label.DEBUG;
}
+ v += 10;
}
- v += 6 + readInt(v + 2);
}
-
- // 2nd phase: visits each instruction
- if (FRAMES && stackMap != 0) {
- // creates the very first (implicit) frame from the method
- // descriptor
- frameLocal = new Object[maxLocals];
- frameStack = new Object[maxStack];
- if (unzip) {
- int local = 0;
- if ((access & Opcodes.ACC_STATIC) == 0) {
- if ("<init>".equals(name)) {
- frameLocal[local++] = Opcodes.UNINITIALIZED_THIS;
- } else {
- frameLocal[local++] = readClass(header + 2, c);
- }
- }
- j = 1;
- loop: while (true) {
- k = j;
- switch (desc.charAt(j++)) {
- case 'Z':
- case 'C':
- case 'B':
- case 'S':
- case 'I':
- frameLocal[local++] = Opcodes.INTEGER;
- break;
- case 'F':
- frameLocal[local++] = Opcodes.FLOAT;
- break;
- case 'J':
- frameLocal[local++] = Opcodes.LONG;
- break;
- case 'D':
- frameLocal[local++] = Opcodes.DOUBLE;
- break;
- case '[':
- while (desc.charAt(j) == '[') {
- ++j;
- }
- if (desc.charAt(j) == 'L') {
- ++j;
- while (desc.charAt(j) != ';') {
- ++j;
- }
- }
- frameLocal[local++] = desc.substring(k, ++j);
- break;
- case 'L':
- while (desc.charAt(j) != ';') {
- ++j;
- }
- frameLocal[local++] = desc.substring(k + 1,
- j++);
- break;
- default:
- break loop;
- }
+ } else if ("LocalVariableTypeTable".equals(attrName)) {
+ varTypeTable = u + 8;
+ } else if ("LineNumberTable".equals(attrName)) {
+ if ((context.flags & SKIP_DEBUG) == 0) {
+ for (int j = readUnsignedShort(u + 8), v = u; j > 0; --j) {
+ int label = readUnsignedShort(v + 10);
+ if (labels[label] == null) {
+ readLabel(label, labels).status |= Label.DEBUG;
}
- frameLocalCount = local;
+ labels[label].line = readUnsignedShort(v + 12);
+ v += 4;
}
- /*
- * for the first explicit frame the offset is not
- * offset_delta + 1 but only offset_delta; setting the
- * implicit frame offset to -1 allow the use of the
- * "offset_delta + 1" rule in all cases
- */
- frameOffset = -1;
- /*
- * Finds labels for UNINITIALIZED frame types. Instead of
- * decoding each element of the stack map table, we look
- * for 3 consecutive bytes that "look like" an UNINITIALIZED
- * type (tag 8, offset within code bounds, NEW instruction
- * at this offset). We may find false positives (i.e. not
- * real UNINITIALIZED types), but this should be rare, and
- * the only consequence will be the creation of an unneeded
- * label. This is better than creating a label for each NEW
- * instruction, and faster than fully decoding the whole
- * stack map table.
- */
- for (j = stackMap; j < stackMap + stackMapSize - 2; ++j) {
- if (b[j] == 8) { // UNINITIALIZED FRAME TYPE
- k = readUnsignedShort(j + 1);
- if (k >= 0 && k < codeLength) { // potential offset
- if ((b[codeStart + k] & 0xFF) == Opcodes.NEW) { // NEW at this offset
- readLabel(k, labels);
- }
- }
+ }
+ } else if (ANNOTATIONS
+ && "RuntimeVisibleTypeAnnotations".equals(attrName)) {
+ tanns = readTypeAnnotations(mv, context, u + 8, true);
+ ntoff = tanns.length == 0 || readByte(tanns[0]) < 0x43 ? -1
+ : readUnsignedShort(tanns[0] + 1);
+ } else if (ANNOTATIONS
+ && "RuntimeInvisibleTypeAnnotations".equals(attrName)) {
+ itanns = readTypeAnnotations(mv, context, u + 8, false);
+ nitoff = itanns.length == 0 || readByte(itanns[0]) < 0x43 ? -1
+ : readUnsignedShort(itanns[0] + 1);
+ } else if (FRAMES && "StackMapTable".equals(attrName)) {
+ if ((context.flags & SKIP_FRAMES) == 0) {
+ stackMap = u + 10;
+ stackMapSize = readInt(u + 4);
+ frameCount = readUnsignedShort(u + 8);
+ }
+ /*
+ * here we do not extract the labels corresponding to the
+ * attribute content. This would require a full parsing of the
+ * attribute, which would need to be repeated in the second
+ * phase (see below). Instead the content of the attribute is
+ * read one frame at a time (i.e. after a frame has been
+ * visited, the next frame is read), and the labels it contains
+ * are also extracted one frame at a time. Thanks to the
+ * ordering of frames, having only a "one frame lookahead" is
+ * not a problem, i.e. it is not possible to see an offset
+ * smaller than the offset of the current insn and for which no
+ * Label exist.
+ */
+ /*
+ * This is not true for UNINITIALIZED type offsets. We solve
+ * this by parsing the stack map table without a full decoding
+ * (see below).
+ */
+ } else if (FRAMES && "StackMap".equals(attrName)) {
+ if ((context.flags & SKIP_FRAMES) == 0) {
+ zip = false;
+ stackMap = u + 10;
+ stackMapSize = readInt(u + 4);
+ frameCount = readUnsignedShort(u + 8);
+ }
+ /*
+ * IMPORTANT! here we assume that the frames are ordered, as in
+ * the StackMapTable attribute, although this is not guaranteed
+ * by the attribute format.
+ */
+ } else {
+ for (int j = 0; j < context.attrs.length; ++j) {
+ if (context.attrs[j].type.equals(attrName)) {
+ Attribute attr = context.attrs[j].read(this, u + 8,
+ readInt(u + 4), c, codeStart - 8, labels);
+ if (attr != null) {
+ attr.next = attributes;
+ attributes = attr;
}
}
}
- v = codeStart;
- Label l;
- while (v < codeEnd) {
- w = v - codeStart;
-
- l = labels[w];
- if (l != null) {
- mv.visitLabel(l);
- if (!skipDebug && l.line > 0) {
- mv.visitLineNumber(l.line, l);
+ }
+ u += 6 + readInt(u + 4);
+ }
+ u += 2;
+
+ // generates the first (implicit) stack map frame
+ if (FRAMES && stackMap != 0) {
+ /*
+ * for the first explicit frame the offset is not offset_delta + 1
+ * but only offset_delta; setting the implicit frame offset to -1
+ * allow the use of the "offset_delta + 1" rule in all cases
+ */
+ frame = context;
+ frame.offset = -1;
+ frame.mode = 0;
+ frame.localCount = 0;
+ frame.localDiff = 0;
+ frame.stackCount = 0;
+ frame.local = new Object[maxLocals];
+ frame.stack = new Object[maxStack];
+ if (unzip) {
+ getImplicitFrame(context);
+ }
+ /*
+ * Finds labels for UNINITIALIZED frame types. Instead of decoding
+ * each element of the stack map table, we look for 3 consecutive
+ * bytes that "look like" an UNINITIALIZED type (tag 8, offset
+ * within code bounds, NEW instruction at this offset). We may find
+ * false positives (i.e. not real UNINITIALIZED types), but this
+ * should be rare, and the only consequence will be the creation of
+ * an unneeded label. This is better than creating a label for each
+ * NEW instruction, and faster than fully decoding the whole stack
+ * map table.
+ */
+ for (int i = stackMap; i < stackMap + stackMapSize - 2; ++i) {
+ if (b[i] == 8) { // UNINITIALIZED FRAME TYPE
+ int v = readUnsignedShort(i + 1);
+ if (v >= 0 && v < codeLength) {
+ if ((b[codeStart + v] & 0xFF) == Opcodes.NEW) {
+ readLabel(v, labels);
}
}
+ }
+ }
+ }
- while (FRAMES && frameLocal != null
- && (frameOffset == w || frameOffset == -1))
- {
- // if there is a frame for this offset,
- // makes the visitor visit it,
- // and reads the next frame if there is one.
- if (!zip || unzip) {
- mv.visitFrame(Opcodes.F_NEW,
- frameLocalCount,
- frameLocal,
- frameStackCount,
- frameStack);
- } else if (frameOffset != -1) {
- mv.visitFrame(frameMode,
- frameLocalDiff,
- frameLocal,
- frameStackCount,
- frameStack);
- }
+ // visits the instructions
+ u = codeStart;
+ while (u < codeEnd) {
+ int offset = u - codeStart;
+
+ // visits the label and line number for this offset, if any
+ Label l = labels[offset];
+ if (l != null) {
+ mv.visitLabel(l);
+ if ((context.flags & SKIP_DEBUG) == 0 && l.line > 0) {
+ mv.visitLineNumber(l.line, l);
+ }
+ }
- if (frameCount > 0) {
- int tag, delta, n;
- if (zip) {
- tag = b[stackMap++] & 0xFF;
- } else {
- tag = MethodWriter.FULL_FRAME;
- frameOffset = -1;
- }
- frameLocalDiff = 0;
- if (tag < MethodWriter.SAME_LOCALS_1_STACK_ITEM_FRAME)
- {
- delta = tag;
- frameMode = Opcodes.F_SAME;
- frameStackCount = 0;
- } else if (tag < MethodWriter.RESERVED) {
- delta = tag
- - MethodWriter.SAME_LOCALS_1_STACK_ITEM_FRAME;
- stackMap = readFrameType(frameStack,
- 0,
- stackMap,
- c,
- labels);
- frameMode = Opcodes.F_SAME1;
- frameStackCount = 1;
- } else {
- delta = readUnsignedShort(stackMap);
- stackMap += 2;
- if (tag == MethodWriter.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED)
- {
- stackMap = readFrameType(frameStack,
- 0,
- stackMap,
- c,
- labels);
- frameMode = Opcodes.F_SAME1;
- frameStackCount = 1;
- } else if (tag >= MethodWriter.CHOP_FRAME
- && tag < MethodWriter.SAME_FRAME_EXTENDED)
- {
- frameMode = Opcodes.F_CHOP;
- frameLocalDiff = MethodWriter.SAME_FRAME_EXTENDED
- - tag;
- frameLocalCount -= frameLocalDiff;
- frameStackCount = 0;
- } else if (tag == MethodWriter.SAME_FRAME_EXTENDED)
- {
- frameMode = Opcodes.F_SAME;
- frameStackCount = 0;
- } else if (tag < MethodWriter.FULL_FRAME) {
- j = unzip ?
<TRUNCATED>