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https://issues.apache.org/jira/browse/STDCXX-449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Travis Vitek updated STDCXX-449:
--------------------------------
Attachment: _tcheck.h
Well, as I pointed out above, the only way I see to deal with this is to use
the thread checker notify library to tell the thread checker that things are
okay. If this is the route that we decide to go, then the attached file
{{include/rw/_tcheck.h}} may be useful.
> [ITC/Linux] std::string Write -> Read data-race errors
> ------------------------------------------------------
>
> Key: STDCXX-449
> URL: https://issues.apache.org/jira/browse/STDCXX-449
> Project: C++ Standard Library
> Issue Type: Bug
> Components: 21. Strings
> Affects Versions: 4.1.2, 4.1.3, 4.1.4, 4.2.0
> Environment: Intel Thread Checker 3.1 on Red Hat Enterprise Linux AS
> release 4 (Nahant Update 4)
> Reporter: Martin Sebor
> Assignee: Travis Vitek
> Priority: Minor
> Fix For: 4.3
>
> Attachments: 21.string.cons.mt.itc-report.html, _tcheck.h
>
>
> Running the Intel Thread Checker on the string thread safety tests
> 21.string.cons.mt and 21.string.push_back.mt produces errors suggesting
> potential thread safety problems even though the tests run successfully to
> completion. See the text output below:
> {noformat}
> $ tcheck_cl -w 200 ./21.string.cons.mt --nloops=100 --nthreads=2
> Intel(R) Thread Checker 3.1 command line instrumentation driver (24400)
> Copyright (c) 2007 Intel Corporation. All rights reserved.
> Building project
> Running: /build/sebor/stdcxx-icc-9.1_042-15s/tests/21.string.cons.mt
> --nloops=100 --nthreads=2
> # INFO (S1) (10 lines):
> # TEXT:
> # COMPILER: Intel C++, __INTEL_COMPILER = 910, __INTEL_COMPILER_BUILD_DATE =
> 20060706, __EDG_VERSION__ = 306
> # ENVIRONMENT: i386 running linux-elf 2.4.20 with glibc 2.3
> # FILE: 21.string.cons.mt.cpp
> # COMPILED: Jun 13 2007, 13:00:49
> # COMMENT: thread safety
> ############################################################
> # CLAUSE: lib.string.cons
> # INFO (S1) (3 lines):
> # TEXT: testing std::string with 2 threads, 100 iterations each
> # CLAUSE: lib.string.cons
> # INFO (S1) (3 lines):
> # TEXT: testing std::wstring with 2 threads, 100 iterations each
> # CLAUSE: lib.string.cons
> # +-----------------------+----------+----------+----------+
> # | DIAGNOSTIC | ACTIVE | TOTAL | INACTIVE |
> # +-----------------------+----------+----------+----------+
> # | (S1) INFO | 3 | 3 | 0% |
> # | (S7) ASSERTION | 0 | 16 | 100% |
> # +-----------------------+----------+----------+----------+
> Application finished
> ________________________________________________________________________________________________________________________________________________________________________________________________________
> |ID |Short Description |Severity |Cou|Context[Best] |Description
>
> |1st Access[Best] |2nd Access[Best] |
> | | |Name |nt | |
>
> | | |
> ________________________________________________________________________________________________________________________________________________________________________________________________________
> |1 |Write -> Read |Error |128|[21.string.cons.mt,|Memory read at
> "_strref.h":159 conflicts with a prior memory write at [21.string.cons.mt,
> |[21.string.cons.mt, |"_strref.h":159 |
> | |data-race | | |0xadf0] |0x3475f] (flow
> dependence)
> |0x3475f] | |
> ________________________________________________________________________________________________________________________________________________________________________________________________________
> |2 |Read -> Write |Error |5 |[21.string.cons.mt,|Memory write
> at [21.string.cons.mt, 0x3475f] conflicts with a prior memory read at
> |"_strref.h":159 |[21.string.cons.mt, |
> | |data-race | | |0x34755]
> |"_strref.h":159 (anti dependence)
> | |0x3475f] |
> ________________________________________________________________________________________________________________________________________________________________________________________________________
> |3 |Thread termination |Information|1 |Whole Program 1 |Thread
> termination at "thread.cpp":76 - includes stack allocation of 10.004 MB and
> use of |"thread.cpp":76 |"thread.cpp":76 |
> | | | | | |4.516 KB
>
> | | |
> ________________________________________________________________________________________________________________________________________________________________________________________________________
> |4 |Thread termination |Information|1 |Whole Program 2 |Thread
> termination at "thread.cpp":76 - includes stack allocation of 10.004 MB and
> use of |"thread.cpp":76 |"thread.cpp":76 |
> | | | | | |4.516 KB
>
> | | |
> ________________________________________________________________________________________________________________________________________________________________________________________________________
> |5 |Read -> Write |Error |7 |[21.string.cons.mt,|Memory write
> at [21.string.cons.mt, 0x3475f] conflicts with a prior memory read at
> |"_strref.h":159 |[21.string.cons.mt, |
> | |data-race | | |0x34755]
> |"_strref.h":159 (anti dependence)
> | |0x3475f] |
> ________________________________________________________________________________________________________________________________________________________________________________________________________
> |6 |Thread termination |Information|1 |Whole Program 3 |Thread
> termination at "thread.cpp":76 - includes stack allocation of 10.004 MB and
> use of |"thread.cpp":76 |"thread.cpp":76 |
> | | | | | |4.516 KB
>
> | | |
> ________________________________________________________________________________________________________________________________________________________________________________________________________
> |7 |Thread termination |Information|1 |Whole Program 4 |Thread
> termination at "thread.cpp":76 - includes stack allocation of 10.004 MB and
> use of |"thread.cpp":76 |"thread.cpp":76 |
> | | | | | |4.516 KB
>
> | | |
> ________________________________________________________________________________________________________________________________________________________________________________________________________
> |8 |Thread termination |Information|1 |Whole Program 5 |Thread
> termination at "21.string.cons.mt.cpp":237 - includes stack allocation of 10
> MB and |"21.string.cons.mt.c|"21.string.cons.mt.cpp|
> | | | | | |use of 8.578
> KB
> |pp":237 |":237 |
> ________________________________________________________________________________________________________________________________________________________________________________________________________
> {noformat}
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