Re: backtrace C-API

Jason Molenda
2003-04-22T00:51:42Z

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
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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