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rename transformer to handler

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金戟 2020-07-22 22:39:34 +08:00
parent d91d972aa7
commit b75e3f5291
3 changed files with 127 additions and 127 deletions
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93
agent/src/main/java/com/alibaba/testable/handler/TestableClassHandler.java Normal file
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@ -0,0 +1,93 @@
package com.alibaba.testable.transformer;
import com.alibaba.testable.model.TravelStatus;
import com.alibaba.testable.util.ClassUtil;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.tree.*;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import static com.alibaba.testable.constant.Const.SYS_CLASSES;
/**
* @author flin
*/
public class TestableClassTransformer implements Opcodes {
private static final String CONSTRUCTOR = "<init>";
private static final String TESTABLE_NE = "n/e";
private final ClassNode cn = new ClassNode();
public TestableClassTransformer(String className) throws IOException {
ClassReader cr = new ClassReader(className);
cr.accept(cn, 0);
}
public byte[] getBytes() {
transform();
ClassWriter cw = new ClassWriter( 0);
cn.accept(cw);
return cw.toByteArray();
}
private void transform() {
List<String> methodNames = new ArrayList<String>();
for (MethodNode m : cn.methods) {
if (!CONSTRUCTOR.equals(m.name)) {
methodNames.add(m.name);
}
}
for (MethodNode m : cn.methods) {
transformMethod(m, methodNames);
}
}
private void transformMethod(MethodNode mn, List<String> methodNames) {
AbstractInsnNode[] instructions = mn.instructions.toArray();
TravelStatus status = TravelStatus.INIT;
String target = "";
int rangeStart = 0;
int i = 0;
do {
if (instructions[i].getOpcode() == Opcodes.NEW) {
TypeInsnNode node = (TypeInsnNode)instructions[i];
if (!SYS_CLASSES.contains(node.desc)) {
target = node.desc;
status = TravelStatus.NEW_REP;
rangeStart = i;
}
} else if (instructions[i].getOpcode() == Opcodes.INVOKESPECIAL) {
MethodInsnNode node = (MethodInsnNode)instructions[i];
if (methodNames.contains(node.name) && cn.name.equals(node.owner)) {
status = TravelStatus.MEM_REP;
} else if (TravelStatus.NEW_REP == status && CONSTRUCTOR.equals(node.name) && target.equals(node.owner)) {
instructions = replaceNewOps(mn, instructions, rangeStart, i);
i = rangeStart;
status = TravelStatus.INIT;
}
}
i++;
} while (i < instructions.length);
}
private AbstractInsnNode[] replaceNewOps(MethodNode mn, AbstractInsnNode[] instructions, int start, int end) {
String classType = ((TypeInsnNode)instructions[start]).desc;
String paramTypes = ((MethodInsnNode)instructions[end]).desc;
mn.instructions.insertBefore(instructions[start], new LdcInsnNode(Type.getType("L" + classType + ";")));
InsnList il = new InsnList();
il.add(new MethodInsnNode(INVOKESTATIC, TESTABLE_NE, "w", ClassUtil.generateTargetDesc(paramTypes), false));
il.add(new TypeInsnNode(CHECKCAST, classType));
mn.instructions.insertBefore(instructions[end], il);
mn.instructions.remove(instructions[start]);
mn.instructions.remove(instructions[start + 1]);
mn.instructions.remove(instructions[end]);
mn.maxStack += 1;
return mn.instructions.toArray();
}
}

105
agent/src/main/java/com/alibaba/testable/transformer/TestableClassTransformer.java
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@ -1,93 +1,56 @@
package com.alibaba.testable.transformer;
import com.alibaba.testable.model.TravelStatus;
import com.alibaba.testable.util.ClassUtil;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.tree.*;
import java.io.IOException;
import java.util.ArrayList;
import java.lang.instrument.ClassFileTransformer;
import java.net.URLClassLoader;
import java.security.ProtectionDomain;
import java.util.HashSet;
import java.util.List;
import static com.alibaba.testable.constant.Const.SYS_CLASSES;
import java.util.Set;
/**
* @author flin
*/
public class TestableClassTransformer implements Opcodes {
public class TestableFileTransformer implements ClassFileTransformer {
private static final String CONSTRUCTOR = "<init>";
private static final String TESTABLE_NE = "n/e";
private final ClassNode cn = new ClassNode();
private static final String ENABLE_TESTABLE = "com.alibaba.testable.annotation.EnableTestable";
private static final String ENABLE_TESTABLE_INJECT = "com.alibaba.testable.annotation.EnableTestableInject";
private static final String TEST_POSTFIX = "Test";
public TestableClassTransformer(String className) throws IOException {
ClassReader cr = new ClassReader(className);
cr.accept(cn, 0);
}
private static final Set<String> loadedClassNames = new HashSet<String>();
public byte[] getBytes() {
transform();
ClassWriter cw = new ClassWriter( 0);
cn.accept(cw);
return cw.toByteArray();
}
private void transform() {
List<String> methodNames = new ArrayList<String>();
for (MethodNode m : cn.methods) {
if (!CONSTRUCTOR.equals(m.name)) {
methodNames.add(m.name);
}
public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined,
ProtectionDomain protectionDomain, byte[] classfileBuffer) {
if (isSystemClass(loader, className) || loadedClassNames.contains(className)) {
// Ignore system class and duplicate class
return null;
}
for (MethodNode m : cn.methods) {
transformMethod(m, methodNames);
List<String> annotations = ClassUtil.getAnnotations(className);
List<String> testAnnotations = ClassUtil.getAnnotations(className + TEST_POSTFIX);
if (!isNeedTransform(annotations, testAnnotations)) {
// Neither EnableTestable on test class, nor EnableTestableInject on source class
return null;
}
try {
loadedClassNames.add(className);
return new TestableClassTransformer(className).getBytes();
} catch (IOException e) {
return null;
}
}
private void transformMethod(MethodNode mn, List<String> methodNames) {
AbstractInsnNode[] instructions = mn.instructions.toArray();
TravelStatus status = TravelStatus.INIT;
String target = "";
int rangeStart = 0;
int i = 0;
do {
if (instructions[i].getOpcode() == Opcodes.NEW) {
TypeInsnNode node = (TypeInsnNode)instructions[i];
if (!SYS_CLASSES.contains(node.desc)) {
target = node.desc;
status = TravelStatus.NEW_REP;
rangeStart = i;
}
} else if (instructions[i].getOpcode() == Opcodes.INVOKESPECIAL) {
MethodInsnNode node = (MethodInsnNode)instructions[i];
if (methodNames.contains(node.name) && cn.name.equals(node.owner)) {
status = TravelStatus.MEM_REP;
} else if (TravelStatus.NEW_REP == status && CONSTRUCTOR.equals(node.name) && target.equals(node.owner)) {
instructions = replaceNewOps(mn, instructions, rangeStart, i);
i = rangeStart;
status = TravelStatus.INIT;
}
}
i++;
} while (i < instructions.length);
private boolean isSystemClass(ClassLoader loader, String className) {
return !(loader instanceof URLClassLoader) || null == className || className.startsWith("jdk/");
}
private AbstractInsnNode[] replaceNewOps(MethodNode mn, AbstractInsnNode[] instructions, int start, int end) {
String classType = ((TypeInsnNode)instructions[start]).desc;
String paramTypes = ((MethodInsnNode)instructions[end]).desc;
mn.instructions.insertBefore(instructions[start], new LdcInsnNode(Type.getType("L" + classType + ";")));
InsnList il = new InsnList();
il.add(new MethodInsnNode(INVOKESTATIC, TESTABLE_NE, "w", ClassUtil.generateTargetDesc(paramTypes), false));
il.add(new TypeInsnNode(CHECKCAST, classType));
mn.instructions.insertBefore(instructions[end], il);
mn.instructions.remove(instructions[start]);
mn.instructions.remove(instructions[start + 1]);
mn.instructions.remove(instructions[end]);
mn.maxStack += 1;
return mn.instructions.toArray();
private boolean isNeedTransform(List<String> annotations, List<String> testAnnotations) {
return annotations != null &&
(annotations.contains(ENABLE_TESTABLE_INJECT) ||
(testAnnotations != null && testAnnotations.contains(ENABLE_TESTABLE)));
}
}

56
agent/src/main/java/com/alibaba/testable/transformer/TestableFileTransformer.java
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@ -1,56 +0,0 @@
package com.alibaba.testable.transformer;
import com.alibaba.testable.util.ClassUtil;
import java.io.IOException;
import java.lang.instrument.ClassFileTransformer;
import java.net.URLClassLoader;
import java.security.ProtectionDomain;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* @author flin
*/
public class TestableFileTransformer implements ClassFileTransformer {
private static final String ENABLE_TESTABLE = "com.alibaba.testable.annotation.EnableTestable";
private static final String ENABLE_TESTABLE_INJECT = "com.alibaba.testable.annotation.EnableTestableInject";
private static final String TEST_POSTFIX = "Test";
private static final Set<String> loadedClassNames = new HashSet<String>();
public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined,
ProtectionDomain protectionDomain, byte[] classfileBuffer) {
if (isSystemClass(loader, className) || loadedClassNames.contains(className)) {
// Ignore system class and duplicate class
return null;
}
List<String> annotations = ClassUtil.getAnnotations(className);
List<String> testAnnotations = ClassUtil.getAnnotations(className + TEST_POSTFIX);
if (!isNeedTransform(annotations, testAnnotations)) {
// Neither EnableTestable on test class, nor EnableTestableInject on source class
return null;
}
try {
loadedClassNames.add(className);
return new TestableClassTransformer(className).getBytes();
} catch (IOException e) {
return null;
}
}
private boolean isSystemClass(ClassLoader loader, String className) {
return !(loader instanceof URLClassLoader) || null == className || className.startsWith("jdk/");
}
private boolean isNeedTransform(List<String> annotations, List<String> testAnnotations) {
return annotations != null &&
(annotations.contains(ENABLE_TESTABLE_INJECT) ||
(testAnnotations != null && testAnnotations.contains(ENABLE_TESTABLE)));
}
}