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Re: gdb single stepping takes ages

From: Luis Machado <lgustavo at codesourcery dot com>
To: Tim Sander <tim at krieglstein dot org>, <gdb at sourceware dot org>
Date: Wed, 18 Jun 2014 09:24:33 +0100
Subject: Re: gdb single stepping takes ages
Authentication-results: sourceware.org; auth=none
References: <11141246 dot 9lllTVUqLL at dabox>
Reply-to: <lgustavo at codesourcery dot com>

On 06/18/2014 08:24 AM, Tim Sander wrote:

Hi

I am currently using openocd as a gdbserver backend for debugging  an embedded
target with gdb 7.7. When i want to step over a single line with -exec-next:

for(int a=0; a<1000000;a++){ };

the time taken for the step is linear to the maximum count number and takes in
my setup about 1 second for one increment of a. Setting a temp breakpoint in
the next line and continuing works much faster.

So is there a way improve the stepping speed in such situations?

Best regards
Tim

In that case i'd use "until <line number>" to skip the loop. Steppingthrough the loop *will* take a long time since GDB instruction-steps itsway out of there (for reasons explained in the Remote Debugging mail youmentioned in the other mail).


Luis

References:
- gdb single stepping takes ages
  - From: Tim Sander

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