Re: gdb behaviour..
Re: gdb behaviour..
- Subject: Re: gdb behaviour..
- From: Paul Forgey <email@hidden>
- Date: Tue, 2 May 2006 15:02:03 -0700
I have similar problems with gdb too. I brought it up on this list
over a year ago nobody believed me. I can never reproduce it with
test code which makes it impossible for me to submit good bug reports
about it. I've been told to make sure I'm not accidentally mixing
components from different versions of X-Code and it works fine for
them. Good for them. I sympathize with the OP but I'm glad it isn't
just me. It happens on ALL of our machines with CLEAN
installations. It's very, very frustrating. I can't tell you how
much time we spend fighting the damn debugger when trying to port our
code to this platform.
I make heavy use of the following C++ features which seem to
aggravate the problem:
- RTTI
- templates
- namespaces
- shared libraries
Objective C++ code importing classes from this code will show the
same problems too.
Has nothing to do with threads. Some of my code is multi threaded
but it happens in single threaded code too. The "continue" behavior
is not because gdb is going to another thread. It seems to happen
when it doesn't believe there is symbol information where there
should be. e.g. stepping into "printf" or some other function that
doesn't have debug info will correctly result in "step over" behavior
instead. But if you try to "step into" a symbol that gdb is confused
about, it will instead act like "continue".
Other problems include breakpoints working about half the time when
specifying a symbol name rather than a file and line. Valid symbols
that gdb can resolve and locate, not mis-typed or unresolved after
loading shared libraries or mis-overloaded C++ functions.
Quite often gdb will also abort with internal assertions, leaving you
screwed after finally getting your program to reproduce that not
often seen bug.
Gdb on Linux is much worse for sure, but it still very broken on OS-X/
Darwin.
On May 2, 2006, at 9:19 AM, Fons Rademakers wrote:
No, single thread.
Cheers, Fons.
David Dunham wrote:
On 2 May 2006, at 06:26, Fons Rademakers wrote:
I've a lot of problems with stepping through my code as often a
click on "Step Over" results in the same behaviour as "Continue",
Is your code threaded?
David Dunham A Sharp, LLC
Voice/Fax: 206 783 7404 http://a-sharp.com
"People seem to misinterpret complexity as sophistication" --
Niklaus Wirth
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