** Summary changed: - unity-system-compositor crashed with SIGSEGV in get_adjusted_ptr(), when proprietary Nvidia drivers are installed + Mir crashes with useless backtrace when mg::Platform methods throw
** Description changed: - unity-system-co[5574]: segfault at 7f8056ee2490 ip 00007f805c592c3b sp - 00007fffd6b871a0 error 4 in libstdc++.so.6.0.21[7f805c506000+172000] + So, the problem that causes unity-system-compositor to crash (rather + than fail to start with a helpful error message) is that when methods on + mg::Platform throw we unload the platform DSO before exception + processing is completed, so libstdc++ goes merrily along trying to + execute code that is longer mapped. + + Original report below: + unity-system-co[5574]: segfault at 7f8056ee2490 ip 00007f805c592c3b sp 00007fffd6b871a0 error 4 in libstdc++.so.6.0.21[7f805c506000+172000] ProblemType: Crash DistroRelease: Ubuntu 16.04 Package: unity-system-compositor 0.4.2+16.04.20160219.1-0ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-10.25-generic 4.4.3 Uname: Linux 4.4.0-10-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia ApportVersion: 2.20-0ubuntu3 Architecture: amd64 CrashCounter: 1 Date: Sat Mar 5 19:03:39 2016 ExecutablePath: /usr/sbin/unity-system-compositor ExecutableTimestamp: 1455894356 GraphicsCard: - Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller]) - Subsystem: Micro-Star International Co., Ltd. [MSI] 4th Gen Core Processor Integrated Graphics Controller [1462:1102] - Subsystem: Micro-Star International Co., Ltd. [MSI] GM204M [GeForce GTX 970M] [1462:1102] + Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller]) + Subsystem: Micro-Star International Co., Ltd. [MSI] 4th Gen Core Processor Integrated Graphics Controller [1462:1102] + Subsystem: Micro-Star International Co., Ltd. [MSI] GM204M [GeForce GTX 970M] [1462:1102] InstallationDate: Installed on 2015-02-25 (374 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) ProcCmdline: /usr/sbin/unity-system-compositor --disable-inactivity-policy=true --on-fatal-error-abort --file /run/lightdm-mir-0 --from-dm-fd 11 --to-dm-fd 20 --vt 8 ProcCwd: / ProcEnviron: - + SegvAnalysis: - Segfault happened at: 0x7f805c592c3b: mov (%rsi),%rax - PC (0x7f805c592c3b) ok - source "(%rsi)" (0x7f8056ee2490) not located in a known VMA region (needed readable region)! - destination "%rax" ok + Segfault happened at: 0x7f805c592c3b: mov (%rsi),%rax + PC (0x7f805c592c3b) ok + source "(%rsi)" (0x7f8056ee2490) not located in a known VMA region (needed readable region)! + destination "%rax" ok SegvReason: reading unknown VMA Signal: 11 SourcePackage: unity-system-compositor StacktraceTop: - ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 - __gxx_personality_v0 () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 - _Unwind_RaiseException () from /lib/x86_64-linux-gnu/libgcc_s.so.1 - _Unwind_Resume_or_Rethrow () from /lib/x86_64-linux-gnu/libgcc_s.so.1 - __cxa_rethrow () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 + ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 + __gxx_personality_v0 () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 + _Unwind_RaiseException () from /lib/x86_64-linux-gnu/libgcc_s.so.1 + _Unwind_Resume_or_Rethrow () from /lib/x86_64-linux-gnu/libgcc_s.so.1 + __cxa_rethrow () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 Title: unity-system-compositor crashed with SIGSEGV in __gxx_personality_v0() UpgradeStatus: Upgraded to xenial on 2015-11-03 (122 days ago) UserGroups: - + version.libdrm: libdrm2 2.4.67-1 version.lightdm: lightdm 1.17.5-0ubuntu2 version.mesa: libegl1-mesa-dev N/A -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to mir in Ubuntu. https://bugs.launchpad.net/bugs/1553549 Title: Mir crashes with useless backtrace when mg::Platform methods throw Status in Mir: Confirmed Status in Unity System Compositor: Confirmed Status in mir package in Ubuntu: Confirmed Status in unity-system-compositor package in Ubuntu: Confirmed Bug description: So, the problem that causes unity-system-compositor to crash (rather than fail to start with a helpful error message) is that when methods on mg::Platform throw we unload the platform DSO before exception processing is completed, so libstdc++ goes merrily along trying to execute code that is longer mapped. Original report below: unity-system-co[5574]: segfault at 7f8056ee2490 ip 00007f805c592c3b sp 00007fffd6b871a0 error 4 in libstdc++.so.6.0.21[7f805c506000+172000] ProblemType: Crash DistroRelease: Ubuntu 16.04 Package: unity-system-compositor 0.4.2+16.04.20160219.1-0ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-10.25-generic 4.4.3 Uname: Linux 4.4.0-10-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia_modeset nvidia ApportVersion: 2.20-0ubuntu3 Architecture: amd64 CrashCounter: 1 Date: Sat Mar 5 19:03:39 2016 ExecutablePath: /usr/sbin/unity-system-compositor ExecutableTimestamp: 1455894356 GraphicsCard: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller]) Subsystem: Micro-Star International Co., Ltd. [MSI] 4th Gen Core Processor Integrated Graphics Controller [1462:1102] Subsystem: Micro-Star International Co., Ltd. [MSI] GM204M [GeForce GTX 970M] [1462:1102] InstallationDate: Installed on 2015-02-25 (374 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1) ProcCmdline: /usr/sbin/unity-system-compositor --disable-inactivity-policy=true --on-fatal-error-abort --file /run/lightdm-mir-0 --from-dm-fd 11 --to-dm-fd 20 --vt 8 ProcCwd: / ProcEnviron: SegvAnalysis: Segfault happened at: 0x7f805c592c3b: mov (%rsi),%rax PC (0x7f805c592c3b) ok source "(%rsi)" (0x7f8056ee2490) not located in a known VMA region (needed readable region)! destination "%rax" ok SegvReason: reading unknown VMA Signal: 11 SourcePackage: unity-system-compositor StacktraceTop: ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 __gxx_personality_v0 () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 _Unwind_RaiseException () from /lib/x86_64-linux-gnu/libgcc_s.so.1 _Unwind_Resume_or_Rethrow () from /lib/x86_64-linux-gnu/libgcc_s.so.1 __cxa_rethrow () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 Title: unity-system-compositor crashed with SIGSEGV in __gxx_personality_v0() UpgradeStatus: Upgraded to xenial on 2015-11-03 (122 days ago) UserGroups: version.libdrm: libdrm2 2.4.67-1 version.lightdm: lightdm 1.17.5-0ubuntu2 version.mesa: libegl1-mesa-dev N/A To manage notifications about this bug go to: https://bugs.launchpad.net/mir/+bug/1553549/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
