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feat: hook readOption for fast api

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novice.li
2024-06-25 21:25:46 +08:00
parent fac5feab85
commit 9823d58d00
1 changed files with 12 additions and 1 deletions
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11
src/main/java/com/novitechie/VMOptionsTransformer.java
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@@ -28,6 +28,17 @@ public class VMOptionsTransformer implements MyTransformer {
list.add(new InsnNode(ARETURN));
list.add(labelNode);
m.instructions.insert(list);
} else if ("readOption".equals(m.name) && "(Ljava/lang/String;Z)Ljava/lang/String;".equals(m.desc)) {
InsnList list = new InsnList();
LabelNode continueLabel = new LabelNode();
list.add(new VarInsnNode(ALOAD, 0));
list.add(new LdcInsnNode("javaagent"));
list.add(new MethodInsnNode(INVOKEVIRTUAL, "java/lang/String", "contains", "(Ljava/lang/CharSequence;)Z", false));
list.add(new JumpInsnNode(IFEQ, continueLabel));
list.add(new InsnNode(ACONST_NULL));
list.add(new InsnNode(ARETURN));
list.add(continueLabel);
m.instructions.insert(list);
}
}
ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);