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Date: Sat, 15 Sep 2012 22:31:00 -0000
From: Mark Wielaard <mark@klomp.org>
To: Dehao Chen <dehao@google.com>
Cc: "H.J. Lu" <hjl.tools@gmail.com>, Andrew Pinski <pinskia@gmail.com>,	Bryce McKinlay <bmckinlay@gmail.com>, Andrew Haley <aph@redhat.com>,	Richard Henderson <rth@redhat.com>,	Jason Merrill <jason@redhat.com>,	Richard Guenther <richard.guenther@gmail.com>,	GCC Patches <gcc-patches@gcc.gnu.org>,	David Li <davidxl@google.com>, java@gcc.gnu.org
Subject: Re: [PATCH] Set correct source location for deallocator calls
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On Sun, Sep 16, 2012 at 06:03:24AM +0800, Dehao Chen wrote:
> The dwarf4 specification says:
> 
> If the value of the DW_AT_high_pc is of class address, it is the
> relocated address of the first location past the last instruction
> associated with the entity; if it is of class constant, the value is
> an unsigned integer offset which when added to the low PC gives the
> address of the first location past the last instruction associated
> with the entity.
> 
> However, I'm not sure how to tell how the DW_AT_high_pc's class is
> represented...

You look at the form in which the attribute is encoded. If it is
DW_FORM_addr then it is of class address, otherwise (DW_FORM_data1,
DW_FORM_data2, DW_FORM_data4, DW_FORM_data8, DW_FORM_sdata or
DW_FORM_udata) it is of class constant.

Cheers,

Mark