Can not get symbols using Frida JavaScript api 'DebugSymbol.fromAddress' - ios

Question

I'm trying to develop a test tool with Frida. Recently I try the code snippet from the doc to log a backtrace:
Interceptor.attach(Module.findExportByName(null, 'open'), {
onEnter: function (args) {
var path = Memory.readUtf8String(args[0]);
console.log("open" + path + ")\n\t" + Thread.backtrace(this.context, Backtracer.ACCURATE).map(DebugSymbol.fromAddress).join("\n") + "\n");
}
});
but we I try to run the script with my app(MyApp), I got these:
open/var/mobile/Containers/Data/Application/E459A8E1-12D5-4E20-8F99-40CA90967C0B/Library/Caches/XXXX/XXXX.plist)
0x1ce3140f Foundation!_NSReadBytesFromFileWithExtendedAttributes
0x1ce356c7 Foundation!-[NSData(NSData) initWithContentsOfFile:options:error:]
0x1cecf0c1 Foundation!+[NSKeyedUnarchiver unarchiveObjectWithFile:]
0x534293 MyApp!0x4f0293
0x5341f5 MyApp!0x4f01f5
0x53450d MyApp!0x4f050d
0x53360f MyApp!0x4ef60f
0x5346b9 MyApp!0x4f06b9
0x8b4473 MyApp!0x870473
0xb81ecb MyApp!0xb3decb
0xb82225 MyApp!0xb3e225
0xb823bf MyApp!0xb3e3bf
0xb3974d MyApp!0xaf574d
0xb00533 MyApp!0xabc533
0x48039 MyApp!0x4039
0x218595c5 UIKit!-[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:]
you can see that the
DebugSymbol.fromAddress
can symbolicate the address for Foundation, but for MyApp it failed.
from the video 19:33, we can see that the DebugSymbol.fromAddress can symbolicate the address of the target app.
I'm using Frida 11.0.12 and the device is iPhone 5 with iOS10.3.3 cracked with h3lix-RC5.
do anyone also meet this problem?

Answer 1

To reproduce your issue I will need the IPA, or at least nm -DC output on MyApp mach0 file.
Also, there is an issue with the script you pasted, path is the first element in args, it's an address which is a reference to a string, args is an array that contains (not finite) arguments.
$ frida -U Telegram
____
/ _ | Frida 11.0.11 - A world-class dynamic instrumentation toolkit
| (_| |
> _ | Commands:
/_/ |_| help -> Displays the help system
. . . . object? -> Display information about 'object'
. . . . exit/quit -> Exit
. . . .
. . . . More info at http://www.frida.re/docs/home/
[iOS Device::Telegram]-> Interceptor.attach(Module.findExportByName(null, "open"), {
onEnter: function (args) {
console.log("open " + Memory.readUtf8String(args[0]));
console.log(Thread.backtrace(this.context, Backtracer.ACCURATE).map(DebugSymbol.fromAddress).join
("\n"));
}
});
{}
[iOS Device::Telegram]-> open /private/var/mobile/Containers/Shared/AppGroup/1E33CAF6-1422-.../Documents/network-usage
0x10109a8ec Telegram!0x102a8ec
0x1822bd4bc libdispatch.dylib!_dispatch_call_block_and_release
0x1822bd47c libdispatch.dylib!_dispatch_client_callout
0x1822c94c0 libdispatch.dylib!_dispatch_queue_drain
0x1822c0f80 libdispatch.dylib!_dispatch_queue_invoke
0x1822cb390 libdispatch.dylib!_dispatch_root_queue_drain
0x1822cb0b0 libdispatch.dylib!_dispatch_worker_thread3
0x1824d5470 libsystem_pthread.dylib!_pthread_wqthread
open /private/var/mobile/Containers/Data/Application/3ED4C762-597B-.../Library/Cookies/Cookies.binarycookies
0x182777dec CoreFoundation!fileOpen
0x182767eb8 CoreFoundation!_CFStreamOpen
0x182777d14 CoreFoundation!CFReadStreamOpen
0x182e578d0 CFNetwork!DiskCookieStorage::readFileToCookies(MemoryCookies*)