Debugging "forked" processes

colourspace · 19 April 2021, 00:13

hello, i'm learning amiga asm and one of the best ways for me to learn is to step through existing code with a debugger. a number of source examples i've run into seem to "fork" themselves with _LVOCreateProc and then exit. in doing so, the debugger also exits (tried with monam and asmpro).

are there any tricks to continue execution or attach to the new process? i've had some luck with barfly's debugger attaching to an arbitrary process, but it ends up with a raw disassembly which makes it very difficult to setup breakpoints

kamelito · 19 April 2021, 11:29

By putting a breakpoint at the start of the code I guess.
http://amigadev.elowar.com/read/ADCD.../node028E.html

meynaf · 19 April 2021, 12:05

Normally the technique is just about making the program self-detaching.
I would skip or remove the code that does the process creation and exits.

colourspace · 19 April 2021, 23:01

Quote:

Originally Posted by meynaf

Normally the technique is just about making the program self-detaching.

thanks for the tip-- this is definitely the case in the code examples i've looked at

19 April 2021, 00:13	#1
colourspace Registered User Join Date: Apr 2020 Location: CHICAGO / USA Posts: 32	Debugging "forked" processes hello, i'm learning amiga asm and one of the best ways for me to learn is to step through existing code with a debugger. a number of source examples i've run into seem to "fork" themselves with _LVOCreateProc and then exit. in doing so, the debugger also exits (tried with monam and asmpro). are there any tricks to continue execution or attach to the new process? i've had some luck with barfly's debugger attaching to an arbitrary process, but it ends up with a raw disassembly which makes it very difficult to setup breakpoints

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19 April 2021, 11:29	#2
kamelito Zone Friend Join Date: May 2006 Location: France Posts: 1,801	By putting a breakpoint at the start of the code I guess. http://amigadev.elowar.com/read/ADCD.../node028E.html

19 April 2021, 12:05	#3
meynaf son of 68k Join Date: Nov 2007 Location: Lyon / France Age: 51 Posts: 5,323	Normally the technique is just about making the program self-detaching. I would skip or remove the code that does the process creation and exits.

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