Xcode produces XPC service which crashes on startup

Question

fdik OP

Created Jun ’20

Replies 2

Boosts 0

Participants 2

When using the Xcode template for XPC service and compiling, the generated binary crashes.

To reproduce select File, New, Project, XPC Service, give the name “Sample” and store with defaults. Compile. Try to run the generated binary.

$ Debug/Sample.xpc/Contents/MacOS % ./Sample
[1] 44094 illegal hardware instruction ./Sample

Filed it with feedback assistant https://feedbackassistant.apple.com/feedback/7723709

Can anyone confirm? Ideas how to get it to work? Using Xcode Version 11.5 (11E608c) on macOS Catalina 10.15.5 (19F101)

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Answer 1

galad87 OP

Jun ’20

A XPC service is not a stand-alone app, it needs to be launched by someone else is a specific way. Either by directly by launchd, or as a result of a request by an app.

0

Answer 2

fdik OP

Jun ’20

That may be. But this can never work with illegal op-codes. That's why I'm reporting. The implementation problem may be related to this:

https://stackoverflow.com/questions/59080105/illegal-hardware-instruction-from-very-simple-code

It tested this code on the Macintosh using clang from mentioned Xcode version. Can confirm:

int proveit()
{
    unsigned int n = 0;
    while (1) n++;
    return 0;
}

int main()
{
    proveit();
    return 0;
}

This is delivering:

$ clang -O -o noway noway.c
$ ./noway
[1]    23086 illegal hardware instruction  ./noway

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