https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
pmderodat at gcc dot gnu.org changed:
What|Removed |Added
Status|NEW |RESOLVED
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #24 from pmderodat at gcc dot gnu.org ---
Author: pmderodat
Date: Thu Nov 26 14:56:24 2015
New Revision: 230968
URL: https://gcc.gnu.org/viewcvs?rev=230968=gcc=rev
Log:
DWARF: fix loc. descr. generation for DW_AT_static_link
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #23 from Eric Botcazou ebotcazou at gcc dot gnu.org ---
The offset between the CFA and e FRAME object is now 0x90 bytes. So
because of alignment constraints, I think we cannot assume we can have a
constant offset (even
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #21 from Pierre-Marie de Rodat derodat at adacore dot com ---
(In reply to Eric Botcazou from comment #18)
I think this is worth investigating though because it's conceptually
much simpler than adding yet another indirection. And
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #22 from Pierre-Marie de Rodat derodat at adacore dot com ---
(In reply to Tom Tromey from comment #20)
Yeah. There wasn't much point submitting it when it wouldn't work anyhow :}
Also see the README.archer file. It explains some
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #20 from Tom Tromey tromey at gcc dot gnu.org ---
Yeah. There wasn't much point submitting it when it wouldn't work anyhow :}
Also see the README.archer file. It explains some changes that are needed.
Also I remember thinking
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #19 from Tom Tromey tromey at gcc dot gnu.org ---
(In reply to Pierre-Marie de Rodat from comment #17)
(In reply to Tom Tromey from comment #16)
I'm curious if you tried it on the test case in this PR.
I did not, but it looks
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #18 from Eric Botcazou ebotcazou at gcc dot gnu.org ---
Jason suggested to change DW_AT_frame_base in order to make it equal to the
address of the FRAME object. I was not sure:
1) how to do it: location descriptions for all
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #17 from Pierre-Marie de Rodat derodat at adacore dot com ---
(In reply to Tom Tromey from comment #16)
I'm curious if you tried it on the test case in this PR.
I did not, but it looks like it now works as expected. Here are the
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #16 from Tom Tromey tromey at gcc dot gnu.org ---
(In reply to Pierre-Marie de Rodat from comment #15)
(In reply to Pierre-Marie de Rodat from comment #13)
[1] This patch teaches GDB how to use DW_AT_static_link in order to find
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #15 from Pierre-Marie de Rodat derodat at adacore dot com ---
(In reply to Pierre-Marie de Rodat from comment #13)
[1] This patch teaches GDB how to use DW_AT_static_link in order to find the
frame corresponding to the lexically
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #14 from Pierre-Marie de Rodat derodat at adacore dot com ---
Created attachment 34868
-- https://gcc.gnu.org/bugzilla/attachment.cgi?id=34868action=edit
patch to generate DWARF-compliant DW_AT_static_link attributes
gcc/
*
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
Pierre-Marie de Rodat derodat at adacore dot com changed:
What|Removed |Added
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #12 from Eric Botcazou ebotcazou at gcc dot gnu.org ---
Author: ebotcazou
Date: Fri Jun 6 08:13:24 2014
New Revision: 211308
URL: http://gcc.gnu.org/viewcvs?rev=211308root=gccview=rev
Log:
PR debug/53927
* function.c
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #11 from Eric Botcazou ebotcazou at gcc dot gnu.org ---
OK, I'm attaching the patchlet. I can submit it when stage #1 opens.
I obviously missed one stage #1, but this is now done:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #8 from Tom Tromey tromey at gcc dot gnu.org 2013-02-01 18:22:21
UTC ---
Yes, but you can do something useful even with this value of
DW_AT_static_link, albeit not exactly what DWARF means.
Regardless, I think GCC should
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #9 from Eric Botcazou ebotcazou at gcc dot gnu.org 2013-02-01
22:16:47 UTC ---
I think this would be a nice addition.
OK, I'm attaching the patchlet. I can submit it when stage #1 opens.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #10 from Eric Botcazou ebotcazou at gcc dot gnu.org 2013-02-01
22:20:38 UTC ---
Created attachment 29333
-- http://gcc.gnu.org/bugzilla/attachment.cgi?id=29333
patch to tweak the static chain at -O0
* function.c
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
Eric Botcazou ebotcazou at gcc dot gnu.org changed:
What|Removed |Added
Status|UNCONFIRMED |NEW
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
Jason Merrill jason at gcc dot gnu.org changed:
What|Removed |Added
Status|NEW |WAITING
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #4 from Tom Tromey tromey at gcc dot gnu.org 2013-01-31 19:40:16
UTC ---
(In reply to comment #3)
I don't see the problem. On both i686 and x86_64 'p self_call' prints 1,
which
matches the value returned by the function,
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
Jason Merrill jason at gcc dot gnu.org changed:
What|Removed |Added
Status|WAITING |NEW
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #6 from Eric Botcazou ebotcazou at gcc dot gnu.org 2013-01-31
22:34:02 UTC ---
The idea is you can determine which instance by computing the static link,
then unwind the stack and look for the corresponding CFA.
The test
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #7 from Jason Merrill jason at gcc dot gnu.org 2013-01-31
23:23:01 UTC ---
I think these two meanings of DW_AT_static_link could be compatible if we
changed nestee's DW_AT_frame_base to point to the FRAME object, i.e. CFA-24.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53927
--- Comment #1 from Tom Tromey tromey at gcc dot gnu.org 2013-01-24 20:24:18
UTC ---
It seems that I read the wrong frame info in my original report.
However, the bug still exists. Here is a new and hopefully more
correct example showing
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