Added SegTracker to FS-UAE's Debugger

lallafa · 15 June 2013, 20:34

I use FS-UAE mainly for testing and debugging own Amiga code. I really like to do this directly with the built-in debugger of FS-UAE, but it was lacking some features that support executable analysis inside Amiga OS. That's why I added Enforcer's SegTracker and FindHit features directly into the debugger...

Now you can list the loaded segments and even attach debug info from the symbol and debug/line hunk sections of an executable to inspect your code.

The code of the extended FS-UAE is available in my public devel branch on fs-uae-gles GitHub Repo. Just clone the repo and build an extended FS-UAE. I tested the code on OS X and Linux. Windows was not tested and might need some polishing first...

Detailed instructions and examples on the usage of the new features can be found on my blog.

I know that such a feature is only useful for a very limited number of users, but I thought I'll give you the pointer, in case someone wants to play with it

And if more users like this extension then a merge of the patch into main line FS-UAE or even WinUAE could make sense...

arti · 16 June 2013, 10:41

Great, I wish this was in WinUAE.

Toni Wilen · 16 June 2013, 10:57

Just wondering why whole segtracker is duplicated in UAE side, instread of using normal AmigaOS segtracker data structures? (Just like uae enforcer does) You won't be able to track anything that happens before dos starts anyway.

lallafa · 16 June 2013, 20:19

Main reason for this extension is convenience

Sure, you can run the original SegTracker in a CLI and call FindHit for each location you want to resolve, but as I am already in the built-in debugger this means a exit-debugger/enter CLI/call command/enter debugger cycle each time during debugging...

Furthermore, the debugger commands are more powerful than FindHit: while the original tool only allows to map hunk+offset to source lines, I added symbol look ups, absolute memory addresses, and also reverse lookups, i.e. enter a symbol name or source location and get the memory location of the corresponding code.

In fact during debugging I mainly use the reverse lookups, e.g. to set a breakpoint at a symbol/source location or disassemble/patch the code there.

With the segment and debug info modeled inside the debugger you can even extend my approach and use the symbol or source line infos everywhere where an address input is required, e.g. d <symbol>. Also the debug output could be annotated this way.

Toni Wilen · 17 June 2013, 10:16

Ah, I thought you added SegTracker support ("SegTracker support" = works with existing SegTracker), not some kind of improved re-implementation.

FrodeSolheim · 26 June 2013, 00:17

Sounds great

I added a blog post about this feature on the FS-UAE home page: http://fs-uae.net/2013/06/26/segtrac...-uaes-debugger

alkis · 27 December 2015, 16:04

Old thread, but:
a) are there any plans for fs-uae to integrate the segtracker into it's debugger?
b) would be way way cool to have watchpoints set up automatically and have a counter (how many times code execution reached there) and aggregated time!!! And then a sorted list based on time and there is your profiler!

FrodeSolheim · 16 January 2016, 11:03

a) I haven't looked into it in detail, but if it is rather trivial to merge in, I'm positive to that. https://github.com/FrodeSolheim/fs-uae/issues/101

15 June 2013, 20:34	#1
lallafa Registered User Join Date: Aug 2010 Location: Erlangen, Germany Posts: 24	Added SegTracker to FS-UAE's Debugger I use FS-UAE mainly for testing and debugging own Amiga code. I really like to do this directly with the built-in debugger of FS-UAE, but it was lacking some features that support executable analysis inside Amiga OS. That's why I added Enforcer's SegTracker and FindHit features directly into the debugger... Now you can list the loaded segments and even attach debug info from the symbol and debug/line hunk sections of an executable to inspect your code. The code of the extended FS-UAE is available in my public devel branch on fs-uae-gles GitHub Repo. Just clone the repo and build an extended FS-UAE. I tested the code on OS X and Linux. Windows was not tested and might need some polishing first... Detailed instructions and examples on the usage of the new features can be found on my blog. I know that such a feature is only useful for a very limited number of users, but I thought I'll give you the pointer, in case someone wants to play with it And if more users like this extension then a merge of the patch into main line FS-UAE or even WinUAE could make sense...

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16 June 2013, 10:41	#2
arti Registered User Join Date: Jul 2008 Location: Poland Posts: 662	Great, I wish this was in WinUAE.

16 June 2013, 10:57	#3
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,505	Just wondering why whole segtracker is duplicated in UAE side, instread of using normal AmigaOS segtracker data structures? (Just like uae enforcer does) You won't be able to track anything that happens before dos starts anyway.

16 June 2013, 20:19	#4
lallafa Registered User Join Date: Aug 2010 Location: Erlangen, Germany Posts: 24	Main reason for this extension is convenience Sure, you can run the original SegTracker in a CLI and call FindHit for each location you want to resolve, but as I am already in the built-in debugger this means a exit-debugger/enter CLI/call command/enter debugger cycle each time during debugging... Furthermore, the debugger commands are more powerful than FindHit: while the original tool only allows to map hunk+offset to source lines, I added symbol look ups, absolute memory addresses, and also reverse lookups, i.e. enter a symbol name or source location and get the memory location of the corresponding code. In fact during debugging I mainly use the reverse lookups, e.g. to set a breakpoint at a symbol/source location or disassemble/patch the code there. With the segment and debug info modeled inside the debugger you can even extend my approach and use the symbol or source line infos everywhere where an address input is required, e.g. d <symbol>. Also the debug output could be annotated this way.

17 June 2013, 10:16	#5
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,505	Ah, I thought you added SegTracker support ("SegTracker support" = works with existing SegTracker), not some kind of improved re-implementation.

26 June 2013, 00:17	#6
FrodeSolheim FS-UAE Developer Join Date: Dec 2011 Location: Førde, Norway Age: 43 Posts: 4,043	Sounds great I added a blog post about this feature on the FS-UAE home page: http://fs-uae.net/2013/06/26/segtrac...-uaes-debugger

27 December 2015, 16:04	#7
alkis Registered User Join Date: Dec 2010 Location: Athens/Greece Age: 53 Posts: 719	Old thread, but: a) are there any plans for fs-uae to integrate the segtracker into it's debugger? b) would be way way cool to have watchpoints set up automatically and have a counter (how many times code execution reached there) and aggregated time!!! And then a sorted list based on time and there is your profiler!

16 January 2016, 11:03	#8
FrodeSolheim FS-UAE Developer Join Date: Dec 2011 Location: Førde, Norway Age: 43 Posts: 4,043	a) I haven't looked into it in detail, but if it is rather trivial to merge in, I'm positive to that. https://github.com/FrodeSolheim/fs-uae/issues/101

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