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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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13
src/main/java/com/novitechie/VMOptionsTransformer.java
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@@ -23,11 +23,22 @@ public class VMOptionsTransformer implements MyTransformer {
InsnList list = new InsnList(); InsnList list = new InsnList();
list.add(new MethodInsnNode(INVOKESTATIC, "com/novitechie/StackTraceRule", "check", "()Z", false)); list.add(new MethodInsnNode(INVOKESTATIC, "com/novitechie/StackTraceRule", "check", "()Z", false));
LabelNode labelNode = new LabelNode(); LabelNode labelNode = new LabelNode();
list.add(new JumpInsnNode(IFEQ,labelNode)); list.add(new JumpInsnNode(IFEQ, labelNode));
list.add(new InsnNode(ACONST_NULL)); list.add(new InsnNode(ACONST_NULL));
list.add(new InsnNode(ARETURN)); list.add(new InsnNode(ARETURN));
list.add(labelNode); list.add(labelNode);
m.instructions.insert(list); 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); ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);