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[BUILDROBOT] Go runtime: calling â__builtin_frame_addressâ with a nonzero argument is unsafe (was: warn for unsafe calls to __builtin_return_address)

From: Jan-Benedict Glaw <jbglaw at lug-owl dot de>
To: Martin Sebor <msebor at gmail dot com>
Cc: Jeff Law <law at redhat dot com>, Segher Boessenkool <segher at kernel dot crashing dot org>, Martin Sebor <msebor at redhat dot com>, Gcc Patch List <gcc-patches at gcc dot gnu dot org>
Date: Mon, 3 Aug 2015 13:55:44 +0200
Subject: [BUILDROBOT] Go runtime: calling â__builtin_frame_addressâ with a nonzero argument is unsafe (was: warn for unsafe calls to __builtin_return_address)
Authentication-results: sourceware.org; auth=none
References: <555E2FC6 dot 60804 at redhat dot com> <555E50A5 dot 60309 at redhat dot com> <557A0617 dot 6040605 at redhat dot com> <55B1C845 dot 1030000 at redhat dot com> <20150725142035 dot GB7309 at gate dot crashing dot org> <55B6F232 dot 2080402 at gmail dot com> <20150728142406 dot GA14409 at gate dot crashing dot org> <55B7A368 dot 3060200 at gmail dot com> <55BBA5A2 dot 8040709 at redhat dot com> <55BEA48F dot 9020808 at gmail dot com>

On Sun, 2015-08-02 17:15:27 -0600, Martin Sebor <msebor@gmail.com> wrote:
> >OK for the trunk.  Sorry for the delay.
> 
> Thank you. Committed in revision 226480.

...und breaks native builds. When doing builds using config-list.mk, I
first build a GCC for the build machine, then re-build a
cross-configured GCC with that.

  While building GCC targeting the build=host machine, I get ie:

http://toolchain.lug-owl.de/buildbot/show_build_details.php?id=459572

/bin/bash ./libtool --tag=CC   --mode=compile /home/jbglaw/build-configlist_mk/rs6000-ibm-aix5.1.0/build-gcc/native-compiler-build/./gcc/xgcc -B/home/jbglaw/build-configlist_mk/rs6000-ibm-aix5.1.0/build-gcc/native-compiler-build/./gcc/ -B/home/jbglaw/build-configlist_mk/rs6000-ibm-aix5.1.0/_install_/x86_64-pc-linux-gnu/bin/ -B/home/jbglaw/build-configlist_mk/rs6000-ibm-aix5.1.0/_install_/x86_64-pc-linux-gnu/lib/ -isystem /home/jbglaw/build-configlist_mk/rs6000-ibm-aix5.1.0/_install_/x86_64-pc-linux-gnu/include -isystem /home/jbglaw/build-configlist_mk/rs6000-ibm-aix5.1.0/_install_/x86_64-pc-linux-gnu/sys-include    -DHAVE_CONFIG_H -I. -I/home/jbglaw/repos-configlist_mk/gcc/libgo  -I /home/jbglaw/repos-configlist_mk/gcc/libgo/runtime -I/home/jbglaw/repos-configlist_mk/gcc/libgo/../libffi/include -I../libffi/include -pthread  -fexceptions -fnon-call-exceptions -fplan9-extensions -fsplit-stack -Wall -Wextra -Wwrite-strings -Wcast-qual -Werror -minline-all-stringops -D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I /home/jbglaw/repos-configlist_mk/gcc/libgo/../libgcc -I /home/jbglaw/repos-configlist_mk/gcc/libgo/../libbacktrace -I ../../gcc/include -g -O2 -MT mprof.lo -MD -MP -MF .deps/mprof.Tpo -c -o mprof.lo mprof.c
libtool: compile:  /home/jbglaw/build-configlist_mk/rs6000-ibm-aix5.1.0/build-gcc/native-compiler-build/./gcc/xgcc -B/home/jbglaw/build-configlist_mk/rs6000-ibm-aix5.1.0/build-gcc/native-compiler-build/./gcc/ -B/home/jbglaw/build-configlist_mk/rs6000-ibm-aix5.1.0/_install_/x86_64-pc-linux-gnu/bin/ -B/home/jbglaw/build-configlist_mk/rs6000-ibm-aix5.1.0/_install_/x86_64-pc-linux-gnu/lib/ -isystem /home/jbglaw/build-configlist_mk/rs6000-ibm-aix5.1.0/_install_/x86_64-pc-linux-gnu/include -isystem /home/jbglaw/build-configlist_mk/rs6000-ibm-aix5.1.0/_install_/x86_64-pc-linux-gnu/sys-include -DHAVE_CONFIG_H -I. -I/home/jbglaw/repos-configlist_mk/gcc/libgo -I /home/jbglaw/repos-configlist_mk/gcc/libgo/runtime -I/home/jbglaw/repos-configlist_mk/gcc/libgo/../libffi/include -I../libffi/include -pthread -fexceptions -fnon-call-exceptions -fplan9-extensions -fsplit-stack -Wall -Wextra -Wwrite-strings -Wcast-qual -Werror -minline-all-stringops -D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I /home/jbglaw/repos-configlist_mk/gcc/libgo/../libgcc -I /home/jbglaw/repos-configlist_mk/gcc/libgo/../libbacktrace -I ../../gcc/include -g -O2 -MT mprof.lo -MD -MP -MF .deps/mprof.Tpo -c mprof.c  -fPIC -DPIC -o .libs/mprof.o
/home/jbglaw/repos-configlist_mk/gcc/libgo/runtime/mprof.goc: In function âruntime_Stackâ:
/home/jbglaw/repos-configlist_mk/gcc/libgo/runtime/mprof.goc:408:5: error: calling â__builtin_frame_addressâ with a nonzero argument is unsafe [-Werror=frame-address]
  sp = runtime_getcallersp(&b);
     ^
cc1: all warnings being treated as errors
Makefile:2613: recipe for target 'mprof.lo' failed
make[4]: *** [mprof.lo] Error 1



Seems Go's runtime uses that feature.

MfG, JBG

-- 
      Jan-Benedict Glaw      jbglaw@lug-owl.de              +49-172-7608481
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Follow-Ups:
- Re: [BUILDROBOT] Go runtime: calling â__builtin_frame_addressâ with a nonzero argument is unsafe
  - From: Martin Sebor

References:
- Re: [PATCH] warn for unsafe calls to __builtin_return_address
  - From: Martin Sebor

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