From aee1fcdf979d65c7623533ddd6d871767be9de13 Mon Sep 17 00:00:00 2001
From: Andrew Burgess <andrew.burgess@embecosm.com>
Date: Wed, 18 Oct 2017 19:53:21 +0100
Subject: gdb: New API for tracking innermost block

This commit is preparation for a later change, at this point there
should be no user visible change.

We currently maintain a global innermost_block which tracks the most
inner block encountered when parsing an expression.

This commit wraps the innermost_block into a new class, and switches all
direct accesses to the variable to use the class API.

gdb/ChangeLog:

	* ada-exp.y (write_var_from_sym): Switch to innermost_block API.
	* ada-lang.c (resolve_subexp): Likewise.
	* breakpoint.c (set_breakpoint_condition) Likewise.
	(watch_command_1) Likewise.
	* c-exp.y (variable): Likewise.
	* d-exp.y (PrimaryExpression): Likewise.
	* f-exp.y (variable): Likewise.
	* go-exp.y (variable): Likewise.
	* m2-exp.y (variable): Likewise.
	* objfiles.c (objfile::~objfile): Likewise.
	* p-exp.y (variable): Likewise.
	* parse.c (innermost_block): Change type.
	* parser-defs.h (class innermost_block_tracker): New.
	(innermost_block): Change to innermost_block_tracker.
	* printcmd.c (display_command): Switch to innermost_block API.
	(do_one_display): Likewise.
	* rust-exp.y (do_one_display): Likewise.
	* symfile.c (clear_symtab_users): Likewise.
	* varobj.c (varobj_create): Switch to innermost_block API, replace
	use of innermost_block with block stored on varobj object.
---
 gdb/printcmd.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'gdb/printcmd.c')

diff --git a/gdb/printcmd.c b/gdb/printcmd.c
index 6256f35..fc9d7e4 100644
--- a/gdb/printcmd.c
+++ b/gdb/printcmd.c
@@ -1723,14 +1723,14 @@ display_command (const char *arg, int from_tty)
       fmt.raw = 0;
     }
 
-  innermost_block = NULL;
+  innermost_block.reset ();
   expression_up expr = parse_expression (exp);
 
   newobj = new display ();
 
   newobj->exp_string = xstrdup (exp);
   newobj->exp = std::move (expr);
-  newobj->block = innermost_block;
+  newobj->block = innermost_block.block ();
   newobj->pspace = current_program_space;
   newobj->number = ++display_number;
   newobj->format = fmt;
@@ -1891,9 +1891,9 @@ do_one_display (struct display *d)
 
       TRY
 	{
-	  innermost_block = NULL;
+	  innermost_block.reset ();
 	  d->exp = parse_expression (d->exp_string);
-	  d->block = innermost_block;
+	  d->block = innermost_block.block ();
 	}
       CATCH (ex, RETURN_MASK_ALL)
 	{
-- 
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