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From: "mawenqi108 at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/55131] New: Segmentation fault happened after upgraded g++ from 3.4.6 to 4.7.0 Date: Tue, 30 Oct 2012 02:17:00 -0000 [thread overview] Message-ID: <bug-55131-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55131 Bug #: 55131 Summary: Segmentation fault happened after upgraded g++ from 3.4.6 to 4.7.0 Classification: Unclassified Product: gcc Version: unknown Status: UNCONFIRMED Severity: blocker Priority: P3 Component: c++ AssignedTo: unassigned@gcc.gnu.org ReportedBy: mawenqi108@gmail.com Created attachment 28570 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28570 The source file Recently I have upgraded the build environment from RHEL 4.7 (32bit) with g++ 3.4.6 to CentOS 6.3 (32bit) with g++ 4.7.0. While an inline assembly function, which implements the atomic comparison and exchange function, could not work anymore.The attachment is the source file for your reference. On the old RHEL 4.7 environment: # g++ -v Reading specs from /usr/lib/gcc/i386-redhat-linux/3.4.6/specs Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-java-awt=gtk --host=i386-redhat-linux Thread model: posix gcc version 3.4.6 20060404 (Red Hat 3.4.6-10) # g++ -Wall -Wextra -g -o test test.cpp test.cpp:37: warning: unused parameter 'argc' test.cpp:37: warning: unused parameter 'argv' # ./test 1 val = 0, oldv = 0, newv = 20 2 val = 20, oldv = 0, newv = 20 3 val = 20, oldv = 20, newv = 20 However, on the new CentOS 6.3 environment: # g++47 -v Using built-in specs. COLLECT_GCC=g++47 COLLECT_LTO_WRAPPER=/usr/libexec/gcc/i686-redhat-linux4.7.0/4.7.0/lto-wrapper Target: i686-redhat-linux4.7.0 Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --disable-build-with-cxx --with-system-zlib --enable-__cxa_atexit --enable-languages=c,c++ --disable-profiling --enable-ld --disable-libgcj --disable-java --disable-gcj --disable-libgcj-multifile --disable-plugin --enable-linker-build-id --with-tune=generic --with-arch=i686 --build=i686-redhat-linux4.7.0 Thread model: posix gcc version 4.7.0 20120507 (Red Hat 4.7.0-3) (GCC) # g++47 -Wall -Wextra -g -fno-strict-aliasing -fwrapv -o test test.cpp test.cpp:36:5: warning: unused parameter ‘argc’ [-Wunused-parameter] test.cpp:36:5: warning: unused parameter ‘argv’ [-Wunused-parameter] # ./test 1 val = 0, oldv = 0, newv = 20 Segmentation fault (core dumped) GDB print following info: (gdb) r Starting program: /home/share/tmp/test 1 val = 0, oldv = 0, newv = 20 Program received signal SIGSEGV, Segmentation fault. 0x08048831 in MyAtomic_CAS64 (tgt=0xbffff610, old=0xbffff608, rep=20) at test.cpp:31 31 : "memory", "edx", "esi", "edi", "cc"); Thanks!
next reply other threads:[~2012-10-30 2:17 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-10-30 2:17 mawenqi108 at gmail dot com [this message] 2012-10-30 2:21 ` [Bug c++/55131] Segmentation fault happened in resulting code (inline-asm) " pinskia at gcc dot gnu.org 2012-10-30 2:28 ` [Bug inline-asm/55131] " pinskia at gcc dot gnu.org 2012-10-30 6:22 ` [Bug c++/55131] " mawenqi108 at gmail dot com 2012-10-30 6:25 ` mawenqi108 at gmail dot com 2012-10-30 9:28 ` redi at gcc dot gnu.org
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