Bug 1212265
| Summary: | internal compiler error: in extract_insn, at recog.c:2154 | ||||||||
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| Product: | Red Hat Enterprise Linux 7 | Reporter: | Daniel Villeneuve <dvilleneuve> | ||||||
| Component: | gcc | Assignee: | Jakub Jelinek <jakub> | ||||||
| Status: | CLOSED ERRATA | QA Contact: | Miroslav Franc <mfranc> | ||||||
| Severity: | low | Docs Contact: | |||||||
| Priority: | unspecified | ||||||||
| Version: | 7.1 | CC: | dvilleneuve, mcermak, mfranc, mpolacek, ohudlick | ||||||
| Target Milestone: | rc | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | i686 | ||||||||
| OS: | Linux | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | gcc-4.8.5-1.el7 | Doc Type: | Bug Fix | ||||||
| Doc Text: |
A bug in TLS handling on 32-bit Intel and AMD architectures caused that the compiler was trying to use %gs: or %fs: segment registers with the Load Effective Address (LEA) instruction. Consequently, a crash could occur in code with __thread arrays of structures or long long integers. This bug has been fixed, and the code compiles correctly.
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Story Points: | --- | ||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2015-11-19 12:22:57 UTC | Type: | Bug | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Embargoed: | |||||||||
| Attachments: |
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Description
Daniel Villeneuve
2015-04-16 03:33:24 UTC
Created attachment 1015012 [details]
The preprocessed file as produced by gcc.
Using memcpy instead of structure assignment circumvents the problem. The gcc version used: bartok[daniel/bug-gcc] 0 $ gcc --version; echo; gcc -v gcc (GCC) 4.8.3 20140911 (Red Hat 4.8.3-9) Copyright (C) 2013 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.8.3/lto-wrapper Target: x86_64-redhat-linux Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin --enable-initfini-array --disable-libgcj --with-isl=/builddir/build/BUILD/gcc-4.8.3-20140911/obj-x86_64-redhat-linux/isl-install --with-cloog=/builddir/build/BUILD/gcc-4.8.3-20140911/obj-x86_64-redhat-linux/cloog-install --enable-gnu-indirect-function --with-tune=generic --with-arch_32=x86-64 --build=x86_64-redhat-linux Thread model: posix gcc version 4.8.3 20140911 (Red Hat 4.8.3-9) (GCC) The problem also occurs with a freshly compiled gcc-4.8.4. I could reproduce this even with the mainline gcc, so there's nothing to backport at the moment. Reduced testcase:
extern __thread struct S { int a, b; } a[10];
struct S foo (int b) { return a[b]; }
Fix committed upstream. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2015-2080.html |