From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 4868 invoked by alias); 14 Jan 2011 13:28:59 -0000 Received: (qmail 4858 invoked by uid 22791); 14 Jan 2011 13:28:58 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Fri, 14 Jan 2011 13:28:54 +0000 From: "gcc at abeckmann dot de" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/47290] New: memory exhausted compiling a destructor with an infinite 'for (;;);' loop X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: gcc at abeckmann dot de X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Date: Fri, 14 Jan 2011 13:34:00 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2011-01/txt/msg01348.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47290 Summary: memory exhausted compiling a destructor with an infinite 'for (;;);' loop Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned@gcc.gnu.org ReportedBy: gcc@abeckmann.de The following piece of code consumes all available memory when being compiled with g++ 4.5 or g++ 4.6 and optimization level -O2 or higher. It compiles correctly with g++ 4.4. gcc version 4.6.0 20110111 (experimental) (GCC) gcc version 4.5.3 20110110 (prerelease) (GCC) ===== 8< ===== struct V { V ( int = 0 ) ; ~V () { for ( ; ; ) ; } int size () ; } ; struct S { V a ; V b ; S () : b ( a . size () ) { } } ; S s ; ===== >8 ===== $ ulimit -v 7000000 # limited to about 7 GB ouf of my 8 GB of RAM so the machine does not start to swap heavily $ g++-trunk -O2 -c memhog.C virtual memory exhausted: Cannot allocate memory $ g++-trunk -v -O2 -c memhog.C Using built-in specs. COLLECT_GCC=/opt/software/x86_64/gcc-trunk/bin/g++-trunk COLLECT_LTO_WRAPPER=/opt/software/x86_64/gcc-trunk/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: ../gcc-trunk/configure --prefix=/opt/software/x86_64/gcc-trunk --program-suffix=-trunk --enable-languages=c,c++ --enable-checking Thread model: posix gcc version 4.6.0 20110111 (experimental) (GCC) COLLECT_GCC_OPTIONS='-v' '-O2' '-c' '-shared-libgcc' '-mtune=generic' '-march=x86-64' /opt/software/x86_64/gcc-trunk/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/cc1plus -quiet -v -D_GNU_SOURCE memhog.C -quiet -dumpbase memhog.C -mtune=generic -march=x86-64 -auxbase memhog -O2 -version -o /tmp/ccmZpTnX.s GNU C++ (GCC) version 4.6.0 20110111 (experimental) (x86_64-unknown-linux-gnu) compiled by GNU C version 4.6.0 20110111 (experimental), GMP version 4.3.2, MPFR version 3.0.0-p3, MPC version 0.8.2 GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 ignoring nonexistent directory "/opt/software/x86_64/gcc-trunk/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/../../../../x86_64-unknown-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /opt/software/x86_64/gcc-trunk/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/../../../../include/c++/4.6.0 /opt/software/x86_64/gcc-trunk/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/../../../../include/c++/4.6.0/x86_64-unknown-linux-gnu /opt/software/x86_64/gcc-trunk/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/../../../../include/c++/4.6.0/backward /opt/software/x86_64/gcc-trunk/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/include /usr/local/include /opt/software/x86_64/gcc-trunk/include /opt/software/x86_64/gcc-trunk/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/include-fixed /usr/include End of search list. GNU C++ (GCC) version 4.6.0 20110111 (experimental) (x86_64-unknown-linux-gnu) compiled by GNU C version 4.6.0 20110111 (experimental), GMP version 4.3.2, MPFR version 3.0.0-p3, MPC version 0.8.2 GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 Compiler executable checksum: e48296e048ab4023a18c7e7537bfd602 virtual memory exhausted: Cannot allocate memory