Re: [PATCH] Fix agent code generate bug of ref

[Yao Qi <yao@codesourcery.com>]

On 03/10/2013 01:00 PM, Hui Zhu wrote:
> @@ -2929,7 +2929,7 @@ dwarf2_compile_expr_to_ax (struct agent_
>   	    if (op == DW_OP_deref_size)
>   	      size = *op_ptr++;
>   	    else
> -	      size = addr_size;
> +	      size = addr_size_bits;

The problem here is SIZE is "size in bytes", but
>
>   	    switch (size)
>   	      {

SIZE is checked as "size in bits".  Your fix is right, but not complete. 
  We also have to fix it when op is DW_OP_deref_size, something like the 
patch below.

I am not familiar with this area, so I might be wrong.

-- 
Yao (齐尧)

@@ -2931,7 +2931,7 @@ dwarf2_compile_expr_to_ax (struct agent_expr 
*expr, struct axs_value *loc,
  	    else
  	      size = addr_size;

-	    switch (size)
+	    switch (size * TARGET_CHAR_BIT)
  	      {
  	      case 8:
  		ax_simple (expr, aop_ref8);