Re: set_value_component_location in apply_val_pretty_printer

[Yao Qi <qiyaoltc@gmail.com>]

On Mon, Nov 21, 2016 at 08:37:24PM +0000, Yao Qi wrote:
> On Mon, Nov 21, 2016 at 06:23:47PM +0000, Yao Qi wrote:
> > I removed the code setting VALUE_NEXT_FRAME_ID, but
> > value_from_component only sets VALUE_FRAME_ID.  The change
> > above is not equivalent, and it causes some regressions in
> > https://sourceware.org/ml/gdb-testers/2016-q4/msg03381.html
> > 
> > Sorry about that.  The fix would be setting both
> > VALUE_NEXT_FRAME_ID and VALUE_FRAME_ID in
> > value_from_component.  I'll give a fix.
> >
> 
> Oh, looks we renamed VALUE_FRAME_ID to VALUE_NEXT_FRAME_ID recently,
> https://sourceware.org/ml/gdb-patches/2016-11/msg00018.html
> and I regression tested against a copy of one-week-old gdb, but
> didn't see the regression.  The fix would be replacing VALUE_FRAME_ID
> with VALUE_NEXT_FRAME_ID in my patch.  Testing the fix...
>

The patch below fixes the regressions by replacing VALUE_FRAME_ID
with VALUE_NEXT_FRAME_ID in value_from_component.  I pushed it in.
 
-- 
Yao (齐尧)

From c5acd8159633cfde315b01431099e1ce5b23dcf7 Mon Sep 17 00:00:00 2001
From: Yao Qi <yao.qi@linaro.org>
Date: Tue, 22 Nov 2016 08:53:34 +0000
Subject: [PATCH] Use VALUE_NEXT_FRAME_ID in value_from_component

We renamed VALUE_FRAME_ID to VALUE_NEXT_FRAME_ID recently,
https://sourceware.org/ml/gdb-patches/2016-11/msg00018.html
and we should use VALUE_NEXT_FRAME_ID in value_from_component
too.

gdb:

2016-11-22  Yao Qi  <yao.qi@linaro.org>

	* value.c (value_from_component): Use VALUE_NEXT_FRAME_ID
	instead of VALUE_FROM_ID.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index dfaddd1..5b88917 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2016-11-22  Yao Qi  <yao.qi@linaro.org>
+
+	* value.c (value_from_component): Use VALUE_NEXT_FRAME_ID
+	instead of VALUE_FROM_ID.
+
 2016-11-21  Simon Marchi  <simon.marchi@ericsson.com>
 
 	* Makefile.in (%o: $(srcdir)/mi/%.c): Add missing POSTCOMPILE
diff --git a/gdb/value.c b/gdb/value.c
index 200d61d..8d33501 100644
--- a/gdb/value.c
+++ b/gdb/value.c
@@ -3815,7 +3815,7 @@ value_from_component (struct value *whole, struct type *type, LONGEST offset)
   v->offset = value_offset (whole) + offset + value_embedded_offset (whole);
   set_value_component_location (v, whole);
   VALUE_REGNUM (v) = VALUE_REGNUM (whole);
-  VALUE_FRAME_ID (v) = VALUE_FRAME_ID (whole);
+  VALUE_NEXT_FRAME_ID (v) = VALUE_NEXT_FRAME_ID (whole);
 
   return v;
 }