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Posted to dev@stdcxx.apache.org by "Martin Sebor (JIRA)" <ji...@apache.org> on 2007/06/19 03:10:25 UTC
[jira] Created: (STDCXX-449) [ITC/Linux] std::string Write -> Read
data-race errors
[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: 4.1.3, 4.2
Environment: Intel Thread Checker 3.1 on Red Hat Enterprise Linux AS release 4 (Nahant Update 4)
Reporter: Martin Sebor
Priority: Critical
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:
$ 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 |
________________________________________________________________________________________________________________________________________________________________________________________________________
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[jira] Updated: (STDCXX-449) [ITC/Linux] std::string Write -> Read
data-race errors
Posted by "Martin Sebor (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/STDCXX-449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Martin Sebor updated STDCXX-449:
--------------------------------
Priority: Minor (was: Critical)
Affects Version/s: 4.1.2
4.1.4
Fix Version/s: 4.2.1
I think these are benign, at least on x86 and x86_64, since the code has been there for eons and the string thread safety tests have been passing, but I'll leave it open so that when we have a bit more time in the 4.2.1 release cycle we can do a better analysis. At the very least we can silence the ITC errors as false positives. Bumped down Priority to Minor and scheduled for 4.2.1.
> [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
> Environment: Intel Thread Checker 3.1 on Red Hat Enterprise Linux AS release 4 (Nahant Update 4)
> Reporter: Martin Sebor
> Priority: Minor
> Fix For: 4.2.1
>
> Attachments: 21.string.cons.mt.itc-report.html
>
>
> 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:
> $ 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 |
> ________________________________________________________________________________________________________________________________________________________________________________________________________
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[jira] Updated: (STDCXX-449) [ITC/Linux] std::string Write -> Read
data-race errors
Posted by "Martin Sebor (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/STDCXX-449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Martin Sebor updated STDCXX-449:
--------------------------------
Attachment: 21.string.cons.mt.itc-report.html
Attached HTML output from the tool.
> [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: 4.2, 4.1.3
> Environment: Intel Thread Checker 3.1 on Red Hat Enterprise Linux AS release 4 (Nahant Update 4)
> Reporter: Martin Sebor
> Priority: Critical
> Attachments: 21.string.cons.mt.itc-report.html
>
>
> 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:
> $ 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 |
> ________________________________________________________________________________________________________________________________________________________________________________________________________
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