Re: [PATCH] Objective-C language support.

[Michael Snyder <msnyder at redhat dot com>]

Adam Fedor wrote:
> 
> This patch adds Objective-C language support to gdb based upon a patch
> provided by Apple Computer Inc from their version of gdb. Note that the
> patch only contains changes to existing files. New files (objc-lang.h,
> objc-lang.c, objc-exp.y) and a gdb.objc testsuite directory are located at
> 
> ftp://ftp.gnustep.org/pub/gnustep/contrib/gdb-objc-patch.tar.gz

Adam, these changes have no effect on anyone who is not debugging
objective c.  They can go in as soon as the appropriate enum values
definitions are in.


>         * parse.c: (length_of_subexp, prefixify_subexp): Handle 
>         OP_MSGCALL, OP_SELECTOR, OP_NSSTRING, and OP_SELF.

> Index: gdb/parse.c
> ===================================================================
> RCS file: /cvs/src/src/gdb/parse.c,v
> retrieving revision 1.25
> diff -u -p -r1.25 parse.c
> --- gdb/parse.c 21 Jun 2002 14:32:10 -0000      1.25
> +++ gdb/parse.c 17 Sep 2002 19:30:53 -0000
> @@ -867,6 +867,11 @@ length_of_subexp (register struct expres
>        args = 1 + longest_to_int (expr->elts[endpos - 2].longconst);
>        break;
> 
> +    case OP_MSGCALL:           /* Objective C message (method) call */
> +      oplen = 4;
> +      args = 1 + longest_to_int (expr->elts[endpos - 2].longconst);
> +      break;
> +
>      case UNOP_MAX:
>      case UNOP_MIN:
>        oplen = 3;
> @@ -898,6 +903,8 @@ length_of_subexp (register struct expres
>        /* fall through */
>      case OP_M2_STRING:
>      case OP_STRING:
> +    case OP_NSSTRING:          /* Objective C Foundation Class NSString constant */
> +    case OP_SELECTOR:          /* Objective C "@selector" pseudo-op */
>      case OP_NAME:
>      case OP_EXPRSTRING:
>        oplen = longest_to_int (expr->elts[endpos - 2].longconst);
> @@ -936,6 +943,7 @@ length_of_subexp (register struct expres
> 
>        /* C++ */
>      case OP_THIS:
> +    case OP_SELF:
>        oplen = 2;
>        break;
> 
> @@ -1004,6 +1012,11 @@ prefixify_subexp (register struct expres
>        args = 1 + longest_to_int (inexpr->elts[inend - 2].longconst);
>        break;
> 
> +    case OP_MSGCALL:           /* Objective C message (method) call */
> +      oplen = 4;
> +      args = 1 + longest_to_int (inexpr->elts[inend - 2].longconst);
> +      break;
> +
>      case UNOP_MIN:
>      case UNOP_MAX:
>        oplen = 3;
> @@ -1034,6 +1047,8 @@ prefixify_subexp (register struct expres
>        /* fall through */
>      case OP_M2_STRING:
>      case OP_STRING:
> +    case OP_NSSTRING:          /* Objective C Foundation Class NSString constant */
> +    case OP_SELECTOR:          /* Objective C "@selector" pseudo-op */
>      case OP_NAME:
>      case OP_EXPRSTRING:
>        oplen = longest_to_int (inexpr->elts[inend - 2].longconst);
> @@ -1072,6 +1087,7 @@ prefixify_subexp (register struct expres
> 
>        /* C++ */
>      case OP_THIS:
> +    case OP_SELF:
>        oplen = 2;
>        break;
>