Re: [PATCH] Fixes testsuit/gdb.base/annota1.exp

[Andrew Cagney <cagney@gnu.org>]

> On powerpc64--linux, annota1.exp has two problems:
> 
> 1) A breakpoint in a shared object may be 'delayed'.  This changes GDB's 
> responce: both when the breakpoint is set and when it is hit.

I'm not sure what you mean.  On i386 GNU/Linux, annota1.exp gets zero 
fails so this would suggest some sort of ISA specific bug?

I see this lets GDB accept the ``warning: adjusting breakpoint'' 
message.  I'm wondering if GDB should even emit the warning - it and the 
descriptor are very much integral parts of the ABI - and hence should be 
trying to always display the descriptor symbol and code address (and not 
display the dot symbol).

What's going to happen when 64-bit PPC stops emiting those dot symbols?

> 2) Due to a bug (I which I knew the number), GDB 'skids' past the top-of-stack 
> when doing a backtrace.  This causes two extra and severial garbage stack 
> frames to be displayed, eventually getting an error.

You mean backtracing past main - that code was recently rewritten. 
However, there's apparently no test case for the feature, perhaphs it it 
should first be added and fixed?.  Anyway, I don't think we should be 
passing a broken backtrace.

Andrew

> I have attached three patches: seperate patches for these two problems and one 
> patch that fixes them both.  I have also attached test logs so you can see 
> what's up.
> 
> Ok to commit? (which one(s)?)
> 
> -=# Paul #=-
> 
> PS:  I thought the 'skidding past top-of-stack' problem was fixed.  But it 
> doesn't seem to be in cvs-main as of last week sometime.