打印ArtMethod信息

print_art_method.js

function readStdString(str: NativePointer) {
    const isTiny = (str.readU8() & 1) === 0;
    if (isTiny) {
        return str.add(1).readUtf8String();
    }
    return str.add(2 * Process.pointerSize).readPointer().readUtf8String();
}

function get_PrettyMethod(){
    let PrettyMethod_ptr =  Module.findExportByName("libart.so", "_ZN3art9ArtMethod12PrettyMethodEPS0_b");
    if (PrettyMethod_ptr == null){
        log(`libart.so PrettyMethod_ptr is null`);
        return;
    }
    log(`PrettyMethod_ptr => ${PrettyMethod_ptr}`);
    let PrettyMethod_func = new NativeFunction(PrettyMethod_ptr, "pointer", ["pointer", "bool"]);
    return PrettyMethod_func;
}

let PrettyMethod_func: any = get_PrettyMethod();

function print_art_method(art_method_ptr: any){
    if (!PrettyMethod_func){
        console.log(`PrettyMethod_func => ${PrettyMethod_func}`);
        return;
    }
    let std_results: NativePointer = PrettyMethod_func(art_method_ptr, 1);
    let [ptr1, ptr2, ptr3] = [
        std_results.readPointer(),
        std_results.add(Process.pointerSize).readPointer(),
        std_results.add(Process.pointerSize * 2).readPointer()
    ]
    let std_string_ptr = Memory.alloc(Process.pointerSize * 3);
    std_string_ptr.writePointer(ptr1);
    std_string_ptr.add(Process.pointerSize * 1).writePointer(ptr2);
    std_string_ptr.add(Process.pointerSize * 2).writePointer(ptr3);
    let function_name = readStdString(std_string_ptr);
    console.log(`function_name:${function_name}`);
}