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Re: [cdt-debug-dev] CDT Win32 Debugger
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Matthew Ballance wrote:
There are two reasons that I'm reluctant to use dbgeng: It's not
redistributable and I think it would be more difficult to support
debugging both Visual Studio and GCC-compiled applications (as I
understand it, dbgeng contains both symbol-table and debugger
functionality. It would, for example, be difficult to insert debug
info from GCC-compiled objects).
Since dbghelp is redistributable, would specifying a supported
version of dbghelp and shipping that version with binary releases of
the debugger solve any problems? Can you see problems with this
approach (practical or legal)?
I spent a few hours quite some time ago, trying to figure out if it
would be possible to support debugging MS-compiled programs. The
approach I found most promising was doing what the WinDbg.exe program is
doing: calling the NTSD command-line debugger (which is much like gdb,
except *horribly* user-unfriendly), sending commands to it, and parsing
the output. If you haven't tried using WinDbg, I recommend you play
around with it. It's available for download at
http://www.microsoft.com/whdc/devtools/debugging/default.mspx.
The NTSD debugger should be present in C:\WinNT\System32 (or
corresponding), according to documentation; however there could be a
problem with version differences. I don't know if NTSD is freely
redistributable.
I also believe this approach is similar as to the one used when
interfacing gdb, which might be good as well as bad. Unfortunately,
there is no MI ("machine interface") mode on NTSD, so the output might
be more problematic to parse than the corresponding output from gdb.
There is some documentation on the subject worth reading in the WinDbg
help file (Press F1 in WinDbg).
/Magnus
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