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From: "jengelh at inai dot de" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/59125] New: [4.8 regression] gcc triggers wrong strncpy_chk Date: Thu, 14 Nov 2013 01:24:00 -0000 [thread overview] Message-ID: <bug-59125-4@http.gcc.gnu.org/bugzilla/> (raw) [-- Warning: decoded text below may be mangled, UTF-8 assumed --] [-- Attachment #1: Type: text/plain; charset="UTF-8", Size: 8328 bytes --] http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59125 Bug ID: 59125 Summary: [4.8 regression] gcc triggers wrong strncpy_chk Product: gcc Version: 4.8.2 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: jengelh at inai dot de Given this compiler version/variant: > gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-suse-linux/4.8/lto-wrapper Target: x86_64-suse-linux Configured with: ../configure --prefix=/usr --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64 --enable-languages=c,c++,objc,fortran,obj-c++,java,ada --enable-checking=release --with-gxx-include-dir=/usr/include/c++/4.8 --enable-ssp --disable-libssp --disable-plugin --with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux' --disable-libgcj --disable-libmudflap --with-slibdir=/lib64 --with-system-zlib --enable-__cxa_atexit --enable-libstdcxx-allocator=new --disable-libstdcxx-pch --enable-version-specific-runtime-libs --enable-linker-build-id --enable-linux-futex --program-suffix=-4.8 --without-system-libunwind --with-arch-32=i586 --with-tune=generic --build=x86_64-suse-linux --host=x86_64-suse-linux Thread model: posix gcc version 4.8.2 20131016 [gcc-4_8-branch revision 203692] (SUSE Linux) and this source: #include <string.h> union u { struct { char vi[8]; char pi[16]; }; char all[8+16+4]; }; void f(union u *u) { char vi[8+1]; char pi[16+1]; strncpy(vi, u->vi, sizeof(u->vi)); strncpy(pi, u->pi, sizeof(u->pi)); strncpy(u->all, "AbcdefghAbcdefghijklmnopAbcd", sizeof(u->all)); } I observe: $ gcc-4.8 -O2 -D_FORTIFY_SOURCE=2 -c test.c In file included from /usr/include/string.h:638:0, from sci.c:1: In function âstrncpyâ, inlined from âfâ at sci.c:15:9: /usr/include/bits/string3.h:120:3: warning: call to __builtin___strncpy_chk will always overflow destination buffer [enabled by default] return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest)); ^ $ gcc-4.7 -O2 -D_FORTIFY_SOURCE=2 -c sci.c $ clang -O2 -D_FORTIFY_SOURCE=2 -c sci.c I would have expected: gcc-4.8 to do as gcc-4.7 did and remain silent. I cannot see anything wrong with the strncpy lines⦠>From gcc-bugs-return-434540-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Nov 14 01:44:08 2013 Return-Path: <gcc-bugs-return-434540-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org> Delivered-To: listarch-gcc-bugs@gcc.gnu.org Received: (qmail 26646 invoked by alias); 14 Nov 2013 01:44:07 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: <gcc-bugs.gcc.gnu.org> List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/> List-Post: <mailto:gcc-bugs@gcc.gnu.org> List-Help: <mailto:gcc-bugs-help@gcc.gnu.org> Sender: gcc-bugs-owner@gcc.gnu.org Delivered-To: mailing list gcc-bugs@gcc.gnu.org Received: (qmail 26625 invoked by uid 48); 14 Nov 2013 01:44:04 -0000 From: "adam at wozniakconsulting dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/59126] New: internal compiler error: Segmentation fault Date: Thu, 14 Nov 2013 01:44:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Version: 4.6.3 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: adam at wozniakconsulting dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter attachments.created Message-ID: <bug-59126-4@http.gcc.gnu.org/bugzilla/> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2013-11/txt/msg01317.txt.bz2 Content-length: 4056 http://gcc.gnu.org/bugzilla/show_bug.cgi?idY126 Bug ID: 59126 Summary: internal compiler error: Segmentation fault Product: gcc Version: 4.6.3 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: adam at wozniakconsulting dot com Created attachment 31214 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id1214&actioníit preprocessed source $ lsb_release -a LSB Version: core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch:cxx-3.0-amd64:cxx-3.0-noarch:cxx-3.1-amd64:cxx-3.1-noarch:cxx-3.2-amd64:cxx-3.2-noarch:cxx-4.0-amd64:cxx-4.0-noarch:desktop-3.1-amd64:desktop-3.1-noarch:desktop-3.2-amd64:desktop-3.2-noarch:desktop-4.0-amd64:desktop-4.0-noarch:graphics-2.0-amd64:graphics-2.0-noarch:graphics-3.0-amd64:graphics-3.0-noarch:graphics-3.1-amd64:graphics-3.1-noarch:graphics-3.2-amd64:graphics-3.2-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-3.2-amd64:printing-3.2-noarch:printing-4.0-amd64:printing-4.0-noarch:qt4-3.1-amd64:qt4-3.1-noarch Distributor ID: Ubuntu Description: Ubuntu 12.04.3 LTS Release: 12.04 Codename: precise $ x86_64-linux-gnu-gcc --version x86_64-linux-gnu-gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3 Copyright (C) 2011 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. make[2]: Entering directory `/home/awozniak/work/firstlook/thermal/toolchain/build/build-mpfr/src' /bin/sh ../libtool --tagÌ --mode=compile x86_64-linux-gnu-gcc -std=gnu99 -DTIME_WITH_SYS_TIME=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_LOCALE_H=1 -DHAVE_WCHAR_H=1 -DHAVE_STDARG=1 -DHAVE_SYS_TIME_H=1 -DHAVE_ALLOCA_H=1 -DHAVE_STDINT_H=1 -DHAVE_VA_COPY=1 -DHAVE_SETLOCALE=1 -DHAVE_GETTIMEOFDAY=1 -DHAVE_LONG_LONG=1 -DHAVE_INTMAX_T=1 -DMPFR_HAVE_INTMAX_MAX=1 -DMPFR_HAVE_FESETROUND=1 -DHAVE_DENORMS=1 -DHAVE_ROUND=1 -DHAVE_TRUNC=1 -DHAVE_FLOOR=1 -DHAVE_CEIL=1 -DHAVE_NEARBYINT=1 -DHAVE_LDOUBLE_IEEE_EXT_LITTLE=1 -DMPFR_USE_THREAD_SAFE=1 -DHAVE_CLOCK_GETTIME=1 -DLT_OBJDIR=\".libs/\" -DHAVE_ATTRIBUTE_MODE=1 -DHAVE___GMPN_ROOTREM=1 -DHAVE___GMPN_SBPI1_DIVAPPR_Q=1 -I. -I../../mpfr-3.1.2/src -Wall -Wmissing-prototypes -Wpointer-arith -Wall -g -O3 -MT set_f.lo -MD -MP -MF .deps/set_f.Tpo -c -o set_f.lo ../../mpfr-3.1.2/src/set_f.c libtool: compile: x86_64-linux-gnu-gcc -std=gnu99 -DTIME_WITH_SYS_TIME=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_LOCALE_H=1 -DHAVE_WCHAR_H=1 -DHAVE_STDARG=1 -DHAVE_SYS_TIME_H=1 -DHAVE_ALLOCA_H=1 -DHAVE_STDINT_H=1 -DHAVE_VA_COPY=1 -DHAVE_SETLOCALE=1 -DHAVE_GETTIMEOFDAY=1 -DHAVE_LONG_LONG=1 -DHAVE_INTMAX_T=1 -DMPFR_HAVE_INTMAX_MAX=1 -DMPFR_HAVE_FESETROUND=1 -DHAVE_DENORMS=1 -DHAVE_ROUND=1 -DHAVE_TRUNC=1 -DHAVE_FLOOR=1 -DHAVE_CEIL=1 -DHAVE_NEARBYINT=1 -DHAVE_LDOUBLE_IEEE_EXT_LITTLE=1 -DMPFR_USE_THREAD_SAFE=1 -DHAVE_CLOCK_GETTIME=1 -DLT_OBJDIR=\".libs/\" -DHAVE_ATTRIBUTE_MODE=1 -DHAVE___GMPN_ROOTREM=1 -DHAVE___GMPN_SBPI1_DIVAPPR_Q=1 -I. -I../../mpfr-3.1.2/src -Wall -Wmissing-prototypes -Wpointer-arith -Wall -g -O3 -MT set_f.lo -MD -MP -MF .deps/set_f.Tpo -c ../../mpfr-3.1.2/src/set_f.c -fPIC -DPIC -o .libs/set_f.o ../../mpfr-3.1.2/src/set_f.c: In function 'mpfr_set_f': ../../mpfr-3.1.2/src/set_f.c:27:1: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <file:///usr/share/doc/gcc-4.6/README.Bugs> for instructions. Preprocessed source stored into /tmp/ccrVWU7l.out file, please attach this to your bugreport. make[2]: *** [set_f.lo] Error 1 make[2]: Leaving directory `/home/awozniak/work/firstlook/thermal/toolchain/build/build-mpfr/src' make[1]: *** [all] Error 2 make[1]: Leaving directory `/home/awozniak/work/firstlook/thermal/toolchain/build/build-mpfr/src' make: *** [all-recursive] Error 1
next reply other threads:[~2013-11-14 1:24 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-11-14 1:24 jengelh at inai dot de [this message] 2013-11-14 9:34 ` [Bug middle-end/59125] [4.8/4.9 Regression] " rguenth at gcc dot gnu.org 2013-11-14 9:42 ` rguenth at gcc dot gnu.org 2013-11-14 12:59 ` rguenth at gcc dot gnu.org 2013-11-15 13:37 ` rguenth at gcc dot gnu.org 2013-11-15 13:39 ` rguenth at gcc dot gnu.org 2013-11-18 15:25 ` rguenth at gcc dot gnu.org 2013-11-18 15:27 ` [Bug middle-end/59125] [4.8 " rguenth at gcc dot gnu.org 2013-12-03 7:49 ` jakub at gcc dot gnu.org 2014-01-08 13:49 ` rafal at rawicki dot org 2014-01-08 14:05 ` rguenth at gcc dot gnu.org 2014-01-09 15:25 ` rguenth at gcc dot gnu.org 2014-01-09 15:30 ` rguenth at gcc dot gnu.org
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