Re: backtrace C-API

[Jason Molenda <jmolenda@apple.com>]

On Monday, April 21, 2003, at 02:04  PM, Andrew Cagney wrote:

>> On Fri, Apr 18, 2003 at 02:33:27PM +0200, Gerrit Bruchhäuser wrote:
>>> Hello,
>>> is there any C-API function in libgdb.a (or some other library) which
>>> returns a call stack (something 'bt' like)?
>> No; but you might find backtrace() useful if you're on a
>> glibc-supported platform.
>
> But there probably should.  How hard is it to create a `target-self' 
> that uses local memory, and a jump-buf for registers?  The tricky bit, 
> I see, is the symbol table assuming a single global structure.


This falls into the category of Nasty Hack, but I helped someone on our 
compiler group with a similar problem a long time ago.  I had them add 
a call at the site of interest which (a) got the current process' pid, 
(b) wrote a little gdb command script into a /tmp file which would 
attach to the process, bt, and detach, (c) ran system ("gdb 
--command=/tmp...") in the function, and (d) removed the file from /tmp.

I'm sure there are better ways to handle all this, but it took about 
five minutes to do all this correctly -- for a one-off problem, it 
wasn't a bad solution.  They captured stdout, massaged the output a 
bit, and had the info they needed.

J
From gdb-return-13510-listarch-gdb=sources.redhat.com@sources.redhat.com Tue Apr 22 05:39:21 2003
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From: "Nimesh D Chanchani" <nimeshc@rediffmail.com>
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Subject: Enhancements/Improvements in GDB 5.2 from GDB 4.18
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Hi ,

I am required to upgrade gdb version 4.18 to gdb version 5.2 for
the ZSP processor. Patches have been applied to gdb 5.2 to port it
to the ZSP processor. I am now looking to incorporate the "special
features" / "improvements" of gdb 5.2 in the newer port. Can
anyone lead me to pointers where I can get a chronological list of
enhancements made to gdb from 4.18 to 5.2. Any Help will be
greatly appreciated.

Thaking in advance

Regards,
Nimesh Chanchani