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* [Bug libstdc++/25288]  New: std::list insert members should have no effects if an exception is thrown
@ 2005-12-06 21:29 lennox at cs dot columbia dot edu
  2005-12-06 21:30 ` [Bug libstdc++/25288] " lennox at cs dot columbia dot edu
                   ` (6 more replies)
  0 siblings, 7 replies; 8+ messages in thread
From: lennox at cs dot columbia dot edu @ 2005-12-06 21:29 UTC (permalink / raw)
  To: gcc-bugs

According to section 23.2.2.3 [lib.list.modifiers] of the C++ specification,
for all the insert member functions of std::list, "If an exception is thrown
there are no effects." 

However, this doesn't appear to be the case for libstdc++.  It's possible for
an exception to be thrown out of an insert() function (e.g. bad_alloc from an
allocator) and still have the list change.

$ g++40 -v -g -O2 -Wall debug_allocate.cpp  -o debug_allocate
Using built-in specs.
Target: i386-portbld-freebsd5.4
Configured with: ./..//gcc-4.0-20050929/configure --disable-nls
--with-system-zlib --with-libiconv-prefix=/usr/local --program-suffix=40
--libdir=/usr/local/lib/gcc/i386-portbld-freebsd5.4/4.0.3
--with-gxx-include-dir=/usr/local/lib/gcc/i386-portbld-freebsd5.4/4.0.3/include/c++/
--with-gmp=/usr/local --disable-shared --prefix=/usr/local
i386-portbld-freebsd5.4
Thread model: posix
gcc version 4.0.3 20050928 (prerelease) [FreeBSD]
 /usr/local/libexec/gcc/i386-portbld-freebsd5.4/4.0.3/cc1plus -quiet -v
debug_allocate.cpp -quiet -dumpbase debug_allocate.cpp -auxbase debug_allocate
-g -O2 -Wall -version -o /var/tmp//cc9cvkJd.s
ignoring nonexistent directory
"/usr/local/lib/gcc/i386-portbld-freebsd5.4/4.0.3/gcc/i386-portbld-freebsd5.4/4.0.3/../../../../i386-portbld-freebsd5.4/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/lib/gcc/i386-portbld-freebsd5.4/4.0.3/include/c++/

/usr/local/lib/gcc/i386-portbld-freebsd5.4/4.0.3/include/c++//i386-portbld-freebsd5.4
 /usr/local/lib/gcc/i386-portbld-freebsd5.4/4.0.3/include/c++//backward
 /usr/local/include

/usr/local/lib/gcc/i386-portbld-freebsd5.4/4.0.3/gcc/i386-portbld-freebsd5.4/4.0.3/include
 /usr/include
End of search list.
GNU C++ version 4.0.3 20050928 (prerelease) [FreeBSD] (i386-portbld-freebsd5.4)
        compiled by GNU C version 4.0.3 20050928 (prerelease) [FreeBSD].
GGC heuristics: --param ggc-min-expand=99 --param ggc-min-heapsize=129460
 as -o /var/tmp//ccljCm8j.o /var/tmp//cc9cvkJd.s
 /usr/local/libexec/gcc/i386-portbld-freebsd5.4/4.0.3/collect2 -V
-dynamic-linker /usr/libexec/ld-elf.so.1 -o debug_allocate /usr/lib/crt1.o
/usr/lib/crti.o
/usr/local/lib/gcc/i386-portbld-freebsd5.4/4.0.3/gcc/i386-portbld-freebsd5.4/4.0.3/crtbegin.o
-L/usr/local/lib/gcc/i386-portbld-freebsd5.4/4.0.3/gcc/i386-portbld-freebsd5.4/4.0.3
-L/usr/local/lib/gcc/i386-portbld-freebsd5.4/4.0.3/gcc/i386-portbld-freebsd5.4/4.0.3/../../..
/var/tmp//ccljCm8j.o -lstdc++ -lm -lgcc -lc -lgcc
/usr/local/lib/gcc/i386-portbld-freebsd5.4/4.0.3/gcc/i386-portbld-freebsd5.4/4.0.3/crtend.o
/usr/lib/crtn.o
GNU ld version 2.15 [FreeBSD] 2004-05-23
  Supported emulations:
   elf_i386_fbsd
$ ./debug_allocate
Caught exception: St9bad_alloc
List size: 5

(I'll attach the test programs immediately after submitting the bug.)


-- 
           Summary: std::list insert members should have no effects if an
                    exception is thrown
           Product: gcc
           Version: 4.0.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: lennox at cs dot columbia dot edu
 GCC build triplet: i386-portbld-freebsd5.4
  GCC host triplet: i386-portbld-freebsd5.4
GCC target triplet: i386-portbld-freebsd5.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25288


^ permalink raw reply	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2007-05-21 14:01 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-12-06 21:29 [Bug libstdc++/25288] New: std::list insert members should have no effects if an exception is thrown lennox at cs dot columbia dot edu
2005-12-06 21:30 ` [Bug libstdc++/25288] " lennox at cs dot columbia dot edu
2005-12-06 21:31 ` lennox at cs dot columbia dot edu
2005-12-06 22:36 ` pcarlini at suse dot de
2005-12-09 18:25 ` paolo at gcc dot gnu dot org
2005-12-30  9:39 ` pcarlini at suse dot de
2007-05-21  8:23 ` pcarlini at suse dot de
2007-05-21 14:01 ` pcarlini at suse dot de

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