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Date: Fri, 20 Jul 2012 09:33:00 -0000
From: Gary Benson <gbenson@redhat.com>
To: dje@google.com
Cc: gdb-patches@sourceware.org, saugustine@google.com
Subject: Re: [RFA 5/4 take 2] Improved linker-debugger interface
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dje@google.com wrote:
> Not that you have to write it, but if you've got the beginnings of
> something already :-), gdb should have a performance testsuite.

FWIW, this is what I was using.  Not much of a start, I know!

Cheers,
Gary

-- 
http://gbenson.net/

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <dlfcn.h>

int
main(int argc, char *argv[])
{
  time_t start;
  int count, i;

  if (argc != 2)
    {
      fprintf (stderr, "usage: %s COUNT\n", argv[0]);
      exit (EXIT_FAILURE);
    }

  count = atoi (argv[1]);
  start = time (NULL);

  for (i = 1; i <= count; i++)
    {
      char path[32];
      void *handle;

      sprintf (path, "./lib%04d.so", i);
      handle = dlopen (path, RTLD_LAZY);
      if (handle == NULL)
	{
	  fprintf (stderr, "%s: dlopen failed\n", path);
	  exit (EXIT_FAILURE);
	}
    }

  printf ("%d libraries loaded in %d seconds.\n", count, time (NULL) - start);
}

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#!/bin/sh=0A=
=0A=
gcc test.c -o test -ldl=0A=
=0A=
touch lib.c=0A=
gcc -fPIC -c lib.c -o lib.o=0A=
=0A=
for i in $(seq 5000); do=0A=
    gcc -shared lib.o -o $(printf "lib%04d.so" $i)=0A=
done=0A=

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