[PATCH] specify arguments to debugee from commandline (second try)

[David Deephanphongs]

This patch allows the user to pass the arguments to the program to be
debugged on the command line.

When the option -run is encountered, gdb stops processing options.  It
treats the first argument after -run as the program name, and
everything that follows is treated as the arguments to the debuggee.

This patch is sans a formal changelog and documentation fixes, I'll
add them if the patch is accepted.

Changes (from gdb+dejagnu-20010327):

inferior.h: change get/set_inferior_arg prototypes to 
get/set_inferior_args prototypes.  get/set_inferior_arg do
not appear anywhere in the code.

main.c: process the -run argument.  
I do this in two passes - the first pass calculates the length of the
argument string, the second pass strcpy and strcat's the arguments
into the buffer.
I do the actual assignment of the inferior_argument variable after the
command file is processed - this will allow the commandline to override
the command file.

	
===== PATCH =====
diff -c3p gdb-orig/inferior.h gdb/inferior.h
*** gdb-orig/inferior.h	Tue Mar 13 18:31:13 2001
--- gdb/inferior.h	Fri Mar 30 12:12:51 2001
*************** extern void tty_command (char *, int);
*** 267,275 ****
  
  extern void attach_command (char *, int);
  
! extern char *get_inferior_arg (void);
  
! extern char *set_inferior_arg (char *);
  
  /* Last signal that the inferior received (why it stopped).  */
  
--- 267,275 ----
  
  extern void attach_command (char *, int);
  
! extern char *get_inferior_args (void);
  
! extern char *set_inferior_args (char *);
  
  /* Last signal that the inferior received (why it stopped).  */
  
diff -c3p gdb-orig/main.c gdb/main.c
*** gdb-orig/main.c	Tue Mar  6 03:21:10 2001
--- gdb/main.c	Fri Mar 30 16:10:46 2001
*************** captured_main (void *data)
*** 168,173 ****
--- 168,177 ----
  
    long time_at_startup = get_run_time ();
  
+   /* Arguments for the inferior program from the commandline. */
+   char *cmdline_inf_args = 0;
+   int cmdline_inf_args_flag = 0;
+ 
    START_PROGRESS (argv[0], 0);
  
  #ifdef MPW
*************** captured_main (void *data)
*** 284,289 ****
--- 288,294 ----
        {"windows", no_argument, &use_windows, 1},
        {"statistics", no_argument, 0, 13},
        {"write", no_argument, &write_files, 1},
+       {"run", no_argument, 0, 14},
  /* Allow machine descriptions to add more options... */
  #ifdef ADDITIONAL_OPTIONS
        ADDITIONAL_OPTIONS
*************** captured_main (void *data)
*** 300,305 ****
--- 305,318 ----
  	if (c == EOF)
  	  break;
  
+ 	/* A -run argument stops the option processing
+ 	   immediately. */
+ 	if (c == 14)
+ 	  {
+ 	    cmdline_inf_args_flag = 1;
+ 	    break;
+ 	  }
+ 
  	/* Long option that takes an argument.  */
  	if (c == 0 && long_options[option_index].flag == 0)
  	  c = long_options[option_index].val;
*************** extern int gdbtk_test (char *);
*** 468,490 ****
  
      /* OK, that's all the options.  The other arguments are filenames.  */
      count = 0;
!     for (; optind < argc; optind++)
!       switch (++count)
! 	{
! 	case 1:
! 	  symarg = argv[optind];
! 	  execarg = argv[optind];
! 	  break;
! 	case 2:
! 	  /* FIXME: The documentation says this can be a "ProcID". as well. */
! 	  corearg = argv[optind];
! 	  break;
! 	case 3:
! 	  fprintf_unfiltered (gdb_stderr,
  			  "Excess command line arguments ignored. (%s%s)\n",
  			  argv[optind], (optind == argc - 1) ? "" : " ...");
! 	  break;
! 	}
      if (batch)
        quiet = 1;
    }
--- 481,538 ----
  
      /* OK, that's all the options.  The other arguments are filenames.  */
      count = 0;
!     if (cmdline_inf_args_flag)
!       {
! 	int arg_len = 1; /* \0 */
! 	int i;
! 	
! 	/* Run through all the arguments to find out how long of a buffer
! 	   we need. */
! 	for (i=optind+1; i<argc; i++)
! 	  {
! 	    arg_len += strlen (argv[i]);
! 	    arg_len += 1; /* for the space that comes after the argument */
! 	  }
! 	cmdline_inf_args = xmalloc( arg_len );
! 	for (; optind < argc; optind++)
! 	  {
! 	    switch (++count)
! 	      {
! 	      case 1:
! 		symarg = argv[optind];
! 		execarg = argv[optind];
! 		break;
! 	      case 2:
! 		strcpy( cmdline_inf_args, argv[optind] );
! 		break;
! 	      default:
! 		strcat (cmdline_inf_args, " ");
! 		strcat (cmdline_inf_args, argv[optind]);
! 		break;
! 	      }
! 	  }
!       }
!     else
!       {
! 	for (; optind < argc; optind++)
! 	  switch (++count)
! 	    {
! 	    case 1:
! 	      symarg = argv[optind];
! 	      execarg = argv[optind];
! 	      break;
! 	    case 2:
! 	      /* FIXME: The documentation says this can be a "ProcID". 
! 		 as well. */
! 	      corearg = argv[optind];
! 	      break;
! 	    case 3:
! 	      fprintf_unfiltered (gdb_stderr,
  			  "Excess command line arguments ignored. (%s%s)\n",
  			  argv[optind], (optind == argc - 1) ? "" : " ...");
! 	      break;
! 	    }
!       }
      if (batch)
        quiet = 1;
    }
*************** extern int gdbtk_test (char *);
*** 669,678 ****
        catch_command_errors (source_command, cmdarg[i], !batch, RETURN_MASK_ALL);
      }
    xfree (cmdarg);
! 
    /* Read in the old history after all the command files have been read. */
    init_history ();
  
    if (batch)
      {
        /* We have hit the end of the batch file.  */
--- 717,732 ----
        catch_command_errors (source_command, cmdarg[i], !batch, RETURN_MASK_ALL);
      }
    xfree (cmdarg);
!   
    /* Read in the old history after all the command files have been read. */
    init_history ();
  
+   if (cmdline_inf_args_flag)
+     {
+       /* Set the inferior arguments now, so we can override the command file. */
+       set_inferior_args (cmdline_inf_args);
+     }
+ 
    if (batch)
      {
        /* We have hit the end of the batch file.  */