[Bug c++/22513] [4.0 regression] Miscompilation of std::list code in Boost.
--- Additional Comments From reichelt at gcc dot gnu dot org 2005-07-27 08:56 --- The fix for PR 22591 fixed a miscompilation of std::list::swap. Could you please try whether this also fixes this problem? -- What|Removed |Added CC||reichelt at gcc dot gnu dot ||org Bug 22513 depends on bug 22591, which changed state. Bug 22591 Summary: [4.0 regression] wrong alias information causes an incorrect redundant load elimination http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22591 What|Old Value |New Value Status|UNCONFIRMED |NEW Status|NEW |ASSIGNED Status|ASSIGNED|RESOLVED Resolution||FIXED Status|RESOLVED|REOPENED Resolution|FIXED | Status|REOPENED|RESOLVED Resolution||FIXEDBug 22513 depends on bug 22591, which changed state. Bug 22591 Summary: [4.0 regression] wrong alias information causes an incorrect redundant load elimination http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22591 What|Old Value |New Value Status|UNCONFIRMED |NEW Status|NEW |ASSIGNED Status|ASSIGNED|RESOLVED Resolution||FIXED Status|RESOLVED|REOPENED Resolution|FIXED | Status|REOPENED|RESOLVED Resolution||FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22513
[Bug c++/22513] [4.0 regression] Miscompilation of std::list code in Boost.
--- Additional Comments From redi at gcc dot gnu dot org 2005-07-27 12:22 --- gcc version 4.0.2 20050727 (prerelease) still shows the problem. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22513
[Bug c++/22513] [4.0 regression] Miscompilation of std::list code in Boost.
--- Additional Comments From reichelt at gcc dot gnu dot org 2005-07-27 12:25 --- Did you do a full bootstrap? A library function was miscompiled, so a just using a new compiler isn't enough. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22513
[Bug c++/22513] [4.0 regression] Miscompilation of std::list code in Boost.
--- Additional Comments From redi at gcc dot gnu dot org 2005-07-27 12:52 --- No, sorry I didn't. Bootstrapping now... -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22513
[Bug c++/22513] [4.0 regression] Miscompilation of std::list code in Boost.
--- Additional Comments From redi at gcc dot gnu dot org 2005-07-27 13:24 --- Testcase succeeds after a clean bootstrap. Hoorah! Thanks. Marking as a duplicate of bug 22591 *** This bug has been marked as a duplicate of 22591 *** -- What|Removed |Added Status|UNCONFIRMED |RESOLVED Resolution||DUPLICATE http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22513
[Bug c++/22513] [4.0 regression] Miscompilation of std::list code in Boost.
--- Additional Comments From redi at gcc dot gnu dot org 2005-07-19 13:53 --- Adding -check-initialization to MUDFLAP_OPTIONS I see a read of an uninitialized variable earlier in the program. This happens with both 4.0 and mainline. I'll try to identify that and see if fixing it affects the original problem. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22513
[Bug c++/22513] [4.0 regression] Miscompilation of std::list code in Boost.
--- Additional Comments From redi at gcc dot gnu dot org 2005-07-17 10:00 --- With mainline I still get no error. With 4.0.2 I get some errors and then the final assertion is triggered (rather than a segfault) so using mudflap changes the behaviour of the program: g++40 -g -static ptr_list.2.cc -I ~/src/boost/ -fmudflap -lmudflap ./a.out *** mudflap violation 1 (check/read): time=1121593057.943466 ptr=0x743440 size=8 pc=0x408aec location=`/home/data/redi/gcc/bin/4.0/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.0.2/../../../../include/c++/4.0.2/bits/stl_list.h:221 (std::_List_const_iteratorvoid*::operator++)' [0x408aec] [0x40274f] [0x402841] Nearby object 1: checked region begins 7337B after and ends 7344B after mudflap object 0x7417c0: name=`malloc region' bounds=[0x741780,0x741797] size=24 area=heap check=1r/1w liveness=2 alloc time=1121593057.943182 pc=0x40936c [0x40936c] [0x409b2c] [0x40feb8] [0x403ec9] Nearby object 2: checked region begins 0B into and ends 7B into mudflap dead object 0x743480: name=`malloc region' bounds=[0x743440,0x743457] size=24 area=heap check=1r/1w liveness=2 alloc time=1121593057.943321 pc=0x40936c [0x40936c] [0x409b2c] [0x40feb8] [0x403ec9] dealloc time=1121593057.943444 pc=0x408f4c [0x408f4c] [0x409f38] [0x401ef5] [0x401f1d] number of nearby objects: 2 mf: assertion failure: `c.size() != c3.size()' in int main() at ptr_list.2.cc:25 Aborted It looks like a good time for me to learn about mudflap and how to interpret that output. Thanks for the tip, Andrew. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22513
[Bug c++/22513] [4.0 regression] Miscompilation of std::list code in Boost.
--- Additional Comments From redi at gcc dot gnu dot org 2005-07-17 10:46 --- P.S. If I compile with -m32 I get 40 mudflap violations, but only one in 64-bit mode. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22513
[Bug c++/22513] [4.0 regression] Miscompilation of std::list code in Boost.
--- Additional Comments From redi at gcc dot gnu dot org 2005-07-16 19:05 --- Created an attachment (id=9290) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=9290action=view) Pre-processed source -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22513
[Bug c++/22513] [4.0 regression] Miscompilation of std::list code in Boost.
--- Additional Comments From giovannibajo at libero dot it 2005-07-16 19:15 --- Might be latent in HEAD -- What|Removed |Added CC||giovannibajo at libero dot ||it http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22513
[Bug c++/22513] [4.0 regression] Miscompilation of std::list code in Boost.
--- Additional Comments From pinskia at gcc dot gnu dot org 2005-07-16 19:47 --- With -fmudflap, I get errors (many of them but this is with i686-pc-linux): *** mudflap violation 1 (check/write): time=1121543018.141782 ptr=0xbfe049c0 size=4 pc=0xed9eb8 location=`/home/data/redi/gcc/bin/4.0/bin/../lib/gcc/x86_64-unknown-linux-gnu/ 4.0.2/../../../../include/c++/4.0.2/bits/stl_list.h:203 (std::_List_const_iteratorvoid*:: _List_const_iterator)' /home/peshtigo/pinskia/linux/lib/libmudflap.so.0(__mf_check+0x48) [0xed9eb8] ./a.out(_ZNSt20_List_const_iteratorIPvEC1EPKSt15_List_node_base+0x6f) [0x804f339] ./a.out(_ZNKSt4listIPvSaIS0_EE3endEv+0x19) [0x804f35d] Nearby object 1: checked region begins 12B before and ends 9B before mudflap object 0x8aa3a10: name=`/home/data/redi/gcc/bin/4.0/bin/../lib/gcc/x86_64-unknown- linux-gnu/4.0.2/../../../../include/c++/4.0.2/bits/stl_list.h:656 (std::listvoid*, std::allocatorvoid* ::size) unnamed variable' bounds=[0xbfe049cc,0xbfe049cf] size=4 area=stack check=0r/0w liveness=0 alloc time=1121543018.141767 pc=0xed9128 Nearby object 2: checked region begins 16B before and ends 13B before mudflap object 0x8aa3a60: name=`/home/data/redi/gcc/bin/4.0/bin/../lib/gcc/x86_64-unknown- linux-gnu/4.0.2/../../../../include/c++/4.0.2/bits/stl_list.h:656 (std::listvoid*, std::allocatorvoid* ::size) unnamed variable' bounds=[0xbfe049d0,0xbfe049d3] size=4 area=stack check=0r/0w liveness=0 alloc time=1121543018.141772 pc=0xed9128 Nearby object 3: checked region begins 29B after and ends 32B after mudflap dead object 0x8aa3948: name=`/home/data/redi/gcc/bin/4.0/bin/../lib/gcc/x86_64- unknown-linux-gnu/4.0.2/../../../../include/c++/4.0.2/bits/stl_list.h:327 (std::_List_basevoid*, std:: allocatorvoid* ::_List_base) unnamed variable' bounds=[0xbfe049a3,0xbfe049a3] size=1 area=stack check=0r/0w liveness=0 alloc time=1121543018.141709 pc=0xed9128 dealloc time=1121543018.141732 pc=0xed8c11 number of nearby objects: 3 Please try with -fmudflap -lmudflap and if you don't get an error then maybe this is a GCC bug but if you do get an error then this looks like a boost bug. -- What|Removed |Added CC||pinskia at gcc dot gnu dot ||org GCC target triplet||x86_64-* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22513
