Bug 282189 – [patch] sys-devel/gcc-4.4.1: produces broken binaries with stdcall tailcalls and -foptimize-sibling-calls

• Status: VERIFIED FIXED
• Product: Gentoo Linux

[Description Sergei Trofimovich (RETIRED) 2009-08-21 11:39:42 UTC]

After upgrading GCC I tried to build my C++ project and noticed crashing produced binaries. After debugging this issue I located the place gcc
emits invalid code. g++-4.3.4 works correctly. I'm not sure what caused regression: vanilla GCC, or gentoo patches, so I post bug here.

Reproducible: Always

Steps to Reproduce:
1. Unpack .tat.gz from attach
2. make
3. ./show_the_bug

Actual Results:  
the result is SIGSEGV

[Comment 1 Sergei Trofimovich (RETIRED) 2009-08-21 11:42:13 UTC]

Created attachment 201854 [details]
gcc_4.4.1_destroys_tailcall.tar.gz

Archive contains source sample, makefile and disassembler dumps for gcc-4.3.4 and gcc-4.4.1 of suspicious file.

[Comment 2 Sergei Trofimovich (RETIRED) 2009-08-21 11:51:30 UTC]

Please note I build i386 binaries(-m32) on amd64

[Comment 3 Sergei Trofimovich (RETIRED) 2009-08-22 12:10:46 UTC]

Upstream bug entry: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40718

[Comment 4 Jeremy Olexa (darkside) (RETIRED) 2009-08-22 18:42:32 UTC]

assigning to maintainers.

[Comment 5 Sergei Trofimovich (RETIRED) 2009-08-29 10:31:41 UTC]

Created attachment 202579 [details, diff]
pr151030.patch

Upstream committed fix http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=151030 to gcc-4_4 branch.
I got it from svn and stripped ChangeLog entries (they don't apply cleanly).

Fix works for me.

[Comment 6 Sergei Trofimovich (RETIRED) 2009-09-08 16:55:10 UTC]

Should I attach gcc .ebuild or something other to make patch hit portage?

[Comment 7 Ryan Hill (RETIRED) 2009-09-10 19:23:18 UTC]

nah, we'll get it next time a new patchset is rolled.

[Comment 8 Peter Alfredsen (RETIRED) 2009-10-23 05:53:35 UTC]

Assuming fixed in 4.4.2

[Comment 9 Sergei Trofimovich (RETIRED) 2009-12-04 22:23:48 UTC]

> Assuming fixed in 4.4.2
Sorry for a delayed response. I confirm - fixed.

Thanks!