2014-09-25 14:48 GMT+04:00 David Coppa <dco...@openbsd.org>: > > Hi all, > > An update on the "infamous" cmake segfault: > > ---8<--- > > Core was generated by `cmake'. > Program terminated with signal 11, Segmentation fault. > > #0 0x0000032f500b0484 in strlen (str=0x32ec339fff8 "????????" <Address > 0x32ec33a0000 out of bounds>) at /usr/src/lib/libc/string/strlen.c:39 > 39 for (s = str; *s; ++s) > (gdb) bt > #0 0x0000032f500b0484 in strlen (str=0x32ec339fff8 "????????" <Address > 0x32ec33a0000 out of bounds>) at /usr/src/lib/libc/string/strlen.c:39 > #1 0x0000032e6d7c1920 in basic_string (this=0x7f7fffff6768, > __s=0x32ec339fff8 "????????" <Address 0x32ec33a0000 out of bounds>, > __a=@0x7f7fffff6777) > at char_traits.h:258 > #2 0x0000032c600e8a23 in cmTarget::GetLinkClosure (this=0x32f5500e028, > config=0x32ec339fff8 "????????" <Address 0x32ec33a0000 out of bounds>, > head=0x32f5500e028) at > /usr/ports/pobj/cmake-3.0.2/cmake-3.0.2/Source/cmTarget.cxx:2972 > #3 0x0000032c601e91ba in cmComputeLinkInformation::GetRPath > (this=0x32e9b3e4800, runtimeDirs=@0x7f7fffff6ab0, for_install=false) > at > /usr/ports/pobj/cmake-3.0.2/cmake-3.0.2/Source/cmComputeLinkInformation.cxx:1982 > #4 0x0000032c60063e47 in cmLocalGenerator::OutputLinkLibraries > (this=0x32eef94c000, linkLibraries=@0x32ef9052a28, > frameworkPath=@0x7f7fffff7398, > linkPath=@0x7f7fffff7390, tgt=@0x32e7da6f600, relink=false) at > /usr/ports/pobj/cmake-3.0.2/cmake-3.0.2/Source/cmLocalGenerator.cxx:1879 > #5 0x0000032c6006130e in cmLocalGenerator::GetTargetFlags > (this=0x32eef94c000, linkLibs=@0x32ef9052a28, flags=@0x32f044e6128, > linkFlags=@0x32f08c61c68, > frameworkPath=@0x7f7fffff7398, linkPath=@0x7f7fffff7390, > target=0x32e7da6f600) > at > /usr/ports/pobj/cmake-3.0.2/cmake-3.0.2/Source/cmLocalGenerator.cxx:1697 > #6 0x0000032c60148610 in cmNinjaNormalTargetGenerator::WriteLinkStatement > (this=0x32e69a52600) > at > /usr/ports/pobj/cmake-3.0.2/cmake-3.0.2/Source/cmNinjaNormalTargetGenerator.cxx:468 > #7 0x0000032c6014cf01 in cmNinjaNormalTargetGenerator::Generate > (this=0x32e69a52600) > at > /usr/ports/pobj/cmake-3.0.2/cmake-3.0.2/Source/cmNinjaNormalTargetGenerator.cxx:96 > #8 0x0000032c6013d78f in cmLocalNinjaGenerator::Generate (this=0x32eef94c000) > at > /usr/ports/pobj/cmake-3.0.2/cmake-3.0.2/Source/cmLocalNinjaGenerator.cxx:81 > #9 0x0000032c60253c8a in cmGlobalGenerator::Generate (this=0x32f2f2e9000) at > /usr/ports/pobj/cmake-3.0.2/cmake-3.0.2/Source/cmGlobalGenerator.cxx:1243 > #10 0x0000032c601375d3 in cmGlobalNinjaGenerator::Generate > (this=0x32f2f2e9000) > at > /usr/ports/pobj/cmake-3.0.2/cmake-3.0.2/Source/cmGlobalNinjaGenerator.cxx:515 > #11 0x0000032c60117983 in cmake::Generate (this=0x7f7fffff7950) at > /usr/ports/pobj/cmake-3.0.2/cmake-3.0.2/Source/cmake.cxx:1715 > #12 0x0000032c60120f4e in cmake::Run (this=0x7f7fffff7950, > args=@0x7f7fffff7e10, noconfigure=false) > at /usr/ports/pobj/cmake-3.0.2/cmake-3.0.2/Source/cmake.cxx:1695 > #13 0x0000032c600258e1 in do_cmake (ac=29, av=0x32f15b51100) at > /usr/ports/pobj/cmake-3.0.2/cmake-3.0.2/Source/cmakemain.cxx:317 > #14 0x0000032c600261a9 in main (ac=29, av=0x32f15b51100) at > /usr/ports/pobj/cmake-3.0.2/cmake-3.0.2/Source/cmakemain.cxx:183 > > ---8<--- > > Good news first: this bug has already been fixed upstream. > > Bad news: the fix is not trivial. They went through a major overhaul[1] > of the string api. Backporting this work using local patches would > be a PITA. > > [1] > http://www.cmake.org/gitweb?p=cmake.git&a=search&h=HEAD&st=commit&s=stringapi > > Here're some additional infos with the help of my silly std::cout > debugging... > > "config" should contain the value of CMAKE_BUILD_TYPE, i.e. it can > be empty or "Debug", "Release", "RelWithDebInfo", "MinSizeRel". > > With cmake-3.0.x, you can see it's filled with all sort of garbage: > > $ grep ^DEBUGGING *.log | grep -vi \=\=\release | grep -v config\ \=\=\$ > kdelibs-4.13.3.log:DEBUGGING config ==: > kdelibs-4.13.3.log:DEBUGGING config ==: > kdelibs-4.13.3.log:DEBUGGING config ==: > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==: > kdelibs-4.13.3.log:DEBUGGING config ==: > kdelibs-4.13.3.log:DEBUGGING config ==: > kdelibs-4.13.3.log:DEBUGGING config ==: > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==/lib > kdelibs-4.13.3.log:DEBUGGING config ==/lib > kdelibs-4.13.3.log:DEBUGGING config ==/lib > kdelibs-4.13.3.log:DEBUGGING config ==/lib > kdelibs-4.13.3.log:DEBUGGING config ==/lib > kdelibs-4.13.3.log:DEBUGGING config ==/lib > kdelibs-4.13.3.log:DEBUGGING config ==/lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==???????? > kdelibs-4.13.3.log:DEBUGGING config ==???????? > kdelibs-4.13.3.log:DEBUGGING config ==???????? > kdelibs-4.13.3.log:DEBUGGING config ==???????? > kdelibs-4.13.3.log:DEBUGGING config ==???????? > kdelibs-4.13.3.log:DEBUGGING config ==???????? > kdelibs-4.13.3.log:DEBUGGING config ==???????? > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==.a > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==lib > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==CXX > kdelibs-4.13.3.log:DEBUGGING config ==-l > kdelibs-4.13.3.log:DEBUGGING config ==-l > kdelibs-4.13.3.log:DEBUGGING config ==-l > kdelibs-4.13.3.log:DEBUGGING config ==-l > kdelibs-4.13.3.log:DEBUGGING config ==-l > kdelibs-4.13.3.log:DEBUGGING config ==-l > kdelibs-4.13.3.log:DEBUGGING config ==-l > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==estdc++ > kdelibs-4.13.3.log:DEBUGGING config ==estdc++ > kdelibs-4.13.3.log:DEBUGGING config ==estdc++ > kdelibs-4.13.3.log:DEBUGGING config ==/lib32 > kdelibs-4.13.3.log:DEBUGGING config ==/lib32 > kdelibs-4.13.3.log:DEBUGGING config ==/lib32 > kdelibs-4.13.3.log:DEBUGGING config ==c > kdelibs-4.13.3.log:DEBUGGING config ==c > kdelibs-4.13.3.log:DEBUGGING config ==c > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==.so > kdelibs-4.13.3.log:DEBUGGING config ==.so > > Newer CMake does it right: > > $ grep ^DEBUGGING *.log | grep -vi \=\=\release | grep -v config\ \=\=\$ > $ > > And, indeed, it survived w/o segfaults to: > > $ for i in `jot 200` ; do make clean configure 2>&1 | > /usr/ports/infrastructure/bin/portslogger /usr/ports/x11/kde4/libs/log${i} ; > done > > CMake 3.1 (the one with the improved string handling) is scheduled > for release on 2014-11-01. > > Are you ok with just waiting?
Yes, I am ok to wait. Not sure about people doing bulk builds, though; I can easily suppose they already hate CMake more than autocrap now... Can we try CMake 3.1 beta as of now? Given that most CMake development nowadays, as I can see, happen in Windows and cross-platform lands, there should not be more regression than win we'll gain by stable builds. > Or should I ask upstream for possible workarounds that can be easily > applied to cmake-3.0.x? Will we lose something in case of asking rather than not doing so? :) > Btw, I think I'm going to write a report on CMake's MantisBT, to > let them know... Feel free to add me to CC list there, too. ;) And thank you a lot for taking care.
