Compiled app debugger like Eurekalog?
lazarus / 12-Debugger

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jl · 2010-05-12 06:42

Hi, i'm looking to decompile a service app.  Does anyone know if
there's the equivalent of the Eurekalog debugger for Lazarus?  Thanks.

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JuhaManninen · 2010-05-12 16:46

Quote from: touchring on May 12, 2010, 08:42:05 amHi, i'm looking to
decompile a service app.  Does anyone know if there's the equivalent
of the Eurekalog debugger for Lazarus?  Thanks.

I have just learned that linking HeapTrc unit into your project
reveals memory leaks and non-handled exceptions. There is a setting
for it in project linking options. Compiler option is -gh.

What means "decompile a service app"?

Juha

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Martin_fr · 2010-05-12 17:21

I don't now of anything exactly like it, but here is what you can do:

- compile you app with debug info
- compile you app with -gh (heaptrc) for mem leaks

- use Application.OnException => to save the trace.. (I have not
tested that)

if anything happens you get a stacktrace.
Compile Lazarus with a package called "leak view" (it's in the list of
available packages, no download needed)

You can paste (or load) the stacktrace from above, and navigate in
your application, simply by clicking on the lines of the stacktrace.

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What is not (yet?) there:

The above would require you to publish an executable with full debug
info:
- very big
- lots of info, you may not want to reveal.

In theory you can (again I haven't done that nor tested it):
- use objdump, to create a map between addresses and files/lines
- strip the debug info from your exe.

If an exception occurs in the released app, you get a stacktrace, but
it only has addresses, no filenames or ine numbers

you need to write an app, that looks app the addresses in the map.....
(maybe something exists, I don't know)

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jl · 2010-05-13 19:39

Quote from: JuhaManninen on May 12, 2010, 06:46:35 pmI have just
learned that linking HeapTrc unit into your project reveals memory
leaks and non-handled exceptions. There is a setting for it in project
linking options. Compiler option is -gh.

What means "decompile a service app"?

Juha



i meant debug a service app.

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Forest · 2010-07-25 14:12

I'm interested in creating such application to read map file and
convert hex pointers into unit/line info. Is it possible at all 
without knowing initial address where executable is loaded into memory
?