Attachment 18927 Details for Bug 41858 – a small program which generates many files to exhibit the bug

a small program which generates many files to exhibit the bug

main.c (text/x-csrc), 2.50 KB, created by Basile Starynkevitch on 2009-10-28 21:40:35 UTC

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Creator: Basile Starynkevitch

Created: 2009-10-28 21:40:35 UTC

Size: 2.50 KB

patch

obsolete

>/* file main.c */
>#include <stdio.h>
>#include <stdlib.h>
>#include <string.h>
>#include <errno.h>
>/* the first time this program, compiled with gcc main.c -o main is
>   run, it creates many small C files [A-Z]*.c; the second time it is
>   run, it should be compiled with: gcc -DGENERATEDALL main.c [A-Z]*.c -o big
> */
>
>/* make a readable name like D_23 */
>void
>name_fun (char *buf, size_t siz, int i)
>{
>  if (i < 0)
>    i = 0;
>  snprintf (buf, siz, "%c_%d", 'A' + (i % 26), i / 26);
>}
>
>int
>main (int argc, char **argv)
>{
>  int cnt = 3000;
>  char funam[40];
>  char callednam[40];
>  char filnam[48];
>  int i = 0;
>  memset (funam, 0, sizeof (funam));
>  memset (callednam, 0, sizeof (callednam));
>  memset (filnam, 0, sizeof (filnam));
>  if (argc > 1)
>    cnt = atoi (argv[1]);
>  if (cnt <= 8)
>    cnt = 8;
>#ifndef GENERATEDALL
>  /* generate all the files */
>  for (i=0; i <= cnt; i++)
>    {
>      FILE *f = 0;
>      int k = 0;
>      memset (funam, 0, sizeof (funam));
>      memset (callednam, 0, sizeof (callednam));
>      memset (filnam, 0, sizeof (filnam));
>      name_fun (funam, sizeof (funam), i);
>      snprintf (filnam, sizeof (filnam) - 1, "%s.c", funam);
>      f = fopen (filnam, "w");
>      if (!f)
>	{
>	  fprintf (stderr, "failed to open %s - %s\n", filnam,
>		   strerror (errno));
>	  exit (1);
>	}
>      fprintf (f, "/* generated file %s */\n", filnam);
>      fputs ("#include <stdio.h>\n", f);
>      fprintf (f, "void %s(int x) {", funam);
>      fputs ("  printf(\"in %s x=%d\\n\", __FUNCTION__, x);\n", f);
>      for (k = 0; k < 10 + cnt / 40; k++)
>	{
>	  int dice = 0;
>	  if (i > 10)
>	    dice = lrand48 () % (i / 2 + 3);
>	  else
>	    dice = i / 3;
>	  fprintf (f, " if (x > %d)\n", (int) (6 + lrand48 () % (3 + cnt / 2)));
>	  if (dice <= 0)
>	    fputs ("   printf(\"..x=%d\\n\", x--);\n", f);
>	  else
>	    {
>	      name_fun (callednam, sizeof (callednam), dice);
>	      fprintf (f, "   %s (x- x/4);\n", callednam);
>	    }
>	}
>      fputs ("  printf(\"done %s x=%d\\n\", __FUNCTION__, x);\n", f);
>      fprintf (f, "} /* end %s */\n", funam);
>      if (i == cnt)
>	fprintf (f, "void last(int n) { %s (n); }\n", funam);
>      fclose (f);
>      f = NULL;
>      if (i % 64 == 0)
>	printf ("generated function #%d in %s\n", i, funam);
>    };
>  printf ("generated %d files last is %s\n", cnt, filnam);
>  printf ("try to compile all %d files with:\n"
>	  "\t gcc-trunk -flto -O2 -DGENERATEDALL main.c [A-Z]*.c -o big\n",
>	  cnt);
>#else
>  printf ("calling the last function with %d\n", cnt);
>  last (cnt);
>  printf ("thanks for all the fish\n");
>#endif
>  return 0;
>}

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Attachments on bug 41858: 18927