[ https://issues.apache.org/jira/browse/STDCXX-1040?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Martin Sebor reassigned STDCXX-1040: ------------------------------------ Assignee: Martin Sebor > Solaris 10 Kernel Update 137111-01 patches > ------------------------------------------ > > Key: STDCXX-1040 > URL: https://issues.apache.org/jira/browse/STDCXX-1040 > Project: C++ Standard Library > Issue Type: Improvement > Components: Build and Installation > Affects Versions: 4.2.0, 4.2.1 > Environment: Solaris 10 10/2008 SPARC, Kernel Update 137111-01 > Reporter: Martin Sebor > Assignee: Martin Sebor > Priority: Critical > Fix For: 4.2.2 > > Attachments: stdcxx-upstream-patches.tar.bz2 > > > Quoting from this [post | http://markmail.org/message/xkvvd4xw2gyqzjip]: > {quote} > Solaris 10 10/2008 SPARC has introduced a binary incompatible change > in the POSIX and Solaris threads implementation: > http://docs.sun.com/app/docs/doc/820-5245/chapter2-1000?a=view > {panel} > Objects of type {{mutex_t}} and {{pthread_mutex_t}} must start at 8-byte > aligned addresses. Applications that do not satisfy this requirement > fail. The following error message is displayed: > \*\*\* {{_THREAD_ERROR_DETECTION}}: lock usage error detected \*\*\* > ... > "mutex is misaligned" > OR: > "condvar is misaligned" > {panel} > In reality, the run-time performance is much worse than the errata > above claims: misaligned mutexes or conditional variables cause the > program to spuriously {{SEGV}} in sometimes hard to reproduce ways [ > Heisenbug ]. > You can view full details of this bug/change here: > http://bugs.opensolaris.org/view_bug.do?bug_id=6729759 > To make a long story short, Solaris Kernel Update 137111-01 introduced > an ABI incompatible implementation restriction, requiring that mutexes > and conditional variables must be 8-byte aligned. This restriction has > never been documented, nor has it ever been enforced, until Solaris 10 > 10/2008 [ Solaris Kernel Update 137111-01 ]. > The consequence of this KU is that, the multi-threaded 32-bit SPARC > version of the Apache Standard C++ Library [ 4.2.1 ] will no longer > work, and will fail at run-time with seemingly unexplainable crashes [ > the exact same build will work on Solaris versions prior to Kernel > Update 137111-01 ]. > This problem is not specific to the Apache Standard C++ Library: it > will occur with any 32-bit SPARCV8 binaries which do not align mutexes > or conditional variables on an 8 byte boundary. > I have created a set of patches for the Apache Standard C++ Library, > Version 4.2.1, for this problem: > http://s247136804.onlinehome.us/stdcxx-upstream/4.2.1/ > You can download the tarball with all the patches from the same URL: > http://s247136804.onlinehome.us/stdcxx-upstream/4.2.1/stdcxx-upstream-patches.tar.bz2 > These patches force an 8-byte alignment for all objects which contain > a mutex or a conditional variable, and that only for SPARC. With these > patches, all the tests perform as expected. > The patch {{22.locale.numpunct.cpp.43.diff}} is not related to the SPARCV8 > ABI change -- it is simply an avoidance of a {{SEGV}} in case the variable > {{first_non_c == NULL}} [ Solaris sprintf(3C) SEGV's on {{NULL char*}} > arguments ]. > {quote} -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.