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From "Mikhail Fursov" <mike.fur...@gmail.com>
Subject Re: [drlvm][jira] Created: (HARMONY-2956) [jit] segfault with -Xem:server option
Date Wed, 10 Jan 2007 12:42:32 GMT
I wrote the code that fail and I hope that this is not GCC 3.4 bug but my
missunderstanding. However I do not understand why for a vector of pointers
that does not contain NULLs gcc3.4 generates code that passes NULL to a
comparator.

The only workaround I know: replace std::sort(..) with std::stable_sort(..).
I'm going to provide a patch this week.



On 10 Jan 2007 15:07:53 +0600, Egor Pasko <egor.pasko@gmail.com> wrote:
>
> On the 0x25A day of Apache Harmony Pavel Ozhdikhin wrote:
> > Naveen,
> >
> > Using gcc 4.1.0 or newer will likely help in your case. There was JIRA
> issue
> > about similar failure:
> >
> > http://issues.apache.org/jira/browse/HARMONY-1873
> >
> > The comments reads that earlier gcc version have a bug in std::sort
> > implementation. That particular issue was fixed by simplifying the
> > comparator expression but the root cause is a bug in gcc.
>
> I would vote to workaround the possible GCC bug. Finding the right GCC
> bugreport would have been ideal.
>
> > Thanks,
> > Pavel
> >
> >
> > On 1/10/07, Naveen Neelakantam <neelakan@uiuc.edu> wrote:
> > >
> > > I am seeing a segfault when I use the -Xem:server option.  I depend
> > > on this option working.
> > >
> > > Thanks,
> > > Naveen
> > >
> > > Begin forwarded message:
> > >
> > > > From: "Naveen Neelakantam (JIRA)" <jira@apache.org>
> > > > Date: January 9, 2007 5:29:27 PM CST
> > > > To: neelakan@uiuc.edu
> > > > Subject: [jira] Created: (HARMONY-2956) [jit] segfault with -
> > > > Xem:server option
> > > >
> > > > [jit] segfault with -Xem:server option
> > > > --------------------------------------
> > > >
> > > >                  Key: HARMONY-2956
> > > >                  URL: https://issues.apache.org/jira/browse/
> > > > HARMONY-2956
> > > >              Project: Harmony
> > > >           Issue Type: Bug
> > > >           Components: DRLVM
> > > >          Environment: RHEL4 update 4, x86, core2 duo
> > > >             Reporter: Naveen Neelakantam
> > > >
> > > >
> > > > The problem seems to occur with any long running program, but you
> > > > can trigger it with the DaCapo benchmarks:
> > > >
> > > >> java -showversion -Xem:server -jar dacapo-2006-10.jar fop
> > > > Apache Harmony Launcher : (c) Copyright 1991, 2006 The Apache
> > > > Software Foundation or its licensors, as applicable.
> > > > java version "1.5.0"
> > > > pre-alpha : not complete or compatible
> > > > svn = r494559, (Jan  9 2007), Linux/ia32/gcc 3.4.6, debug build
> > > > http://incubator.apache.org/harmony
> > > > SIGSEGV in VM code.
> > > > Stack trace:
> > > >         1: Jitrino::Ia32::edge_comparator::getEdgeExecCount
> > > > (Jitrino::Edge const*) (??:-1)
> > > >         2: ?? (00180234
> > > > :180234)
> > > >         3: ?? (0017f79e
> > > > :17)
> > > >         4: ?? (0017f7b0
> > > > :17)
> > > >         5: ?? (0017f7b0
> > > > :17)
> > > >         6: ?? (0017f7b0
> > > > :17)
> > > >         7: ?? (0017f6d3
> > > > :17)
> > > >         8: Jitrino::Ia32::BottomUpLayout::linearizeCfgImpl() (??:-1)
> > > >         9: Jitrino::Ia32::Linearizer::linearizeCfg() (??:-1)
> > > >         10: Jitrino::Ia32::Linearizer::doLayout
> > > > (Jitrino::Ia32::Linearizer::LinearizerType,
> > > > Jitrino::Ia32::IRManager*) (??:-1)
> > > >         11: Jitrino::Ia32::Layouter::runImpl() (??:-1)
> > > >         12: Jitrino::Ia32::SessionAction::run() (??:-1)
> > > >         13: Jitrino::runPipeline(Jitrino::CompilationContext*)
> (??:-1)
> > > >         14: Jitrino::compileMethod(Jitrino::CompilationContext*)
> > > > (??:-1)
> > > >         15: Jitrino::Jitrino::CompileMethod
> > > > (Jitrino::CompilationContext*) (??:-1)
> > > >         16: JIT_compile_method_with_params (??:-1)
> > > >         17: Dll_JIT::compile_method_with_params(void*, Method*,
> > > > OpenMethodExecutionParams) (/home/dcsfiles/neelakan/Sandbox/Harmony/
> > > > stable/working_vm/vm/vmcore/include/dll_jit_intf.h:86)
> > > >         18: compile_do_compilation_jit(Method*, JIT*) (/home/
> > > > dcsfiles/neelakan/Sandbox/Harmony/stable/working_vm/vm/vmcore/src/
> > > > jit/compile.cpp:645)
> > > >         19: vm_compile_method (/home/dcsfiles/neelakan/Sandbox/
> > > > Harmony/stable/working_vm/vm/vmcore/src/class_support/
> > > > C_Interface.cpp:2462)
> > > >         20: DrlEMImpl::compileMethod(Method*) (/home/dcsfiles/
> > > > neelakan/Sandbox/Harmony/stable/working_vm/vm/em/src/DrlEMImpl.cpp:
> > > > 545)
> > > >         21: CompileMethod (/home/dcsfiles/neelakan/Sandbox/Harmony/
> > > > stable/working_vm/vm/em/src/em_intf.cpp:49)
> > > >         22: compile_do_compilation (/home/dcsfiles/neelakan/Sandbox/
> > > > Harmony/stable/working_vm/vm/vmcore/src/jit/compile.cpp:752)
> > > >         23: compile_me(Method*) (/home/dcsfiles/neelakan/Sandbox/
> > > > Harmony/stable/working_vm/vm/vmcore/src/jit/compile.cpp:772)
> > > >         24: IP is 0xB6972162 <native code>
> > > >         25: ?? (??:-1)
> > > >         26: dacapo/parser/ConfigFileTokenManager.jjStartNfa_0(IJ)I
> > > > (ConfigFileTokenManager.java:-1)
> > > >         27: dacapo/parser/
> > > > ConfigFileTokenManager.jjMoveStringLiteralDfa2_0(JJ)I
> > > > (ConfigFileTokenManager.java:-1)
> > > >         28: dacapo/parser/
> > > > ConfigFileTokenManager.jjMoveStringLiteralDfa1_0(J)I
> > > > (ConfigFileTokenManager.java:-1)
> > > >         29: dacapo/parser/
> > > > ConfigFileTokenManager.jjMoveStringLiteralDfa0_0()I
> > > > (ConfigFileTokenManager.java:-1)
> > > >         30: dacapo/parser/ConfigFileTokenManager.getNextToken()
> > > > Ldacapo/parser/Token; (ConfigFileTokenManager.java:-1)
> > > >         31: dacapo/parser/ConfigFile.jj_consume_token(I)Ldacapo/
> > > > parser/Token; (ConfigFile.java:-1)
> > > >         32: dacapo/parser/ConfigFile.config()Ldacapo/parser/Config;
> > > > (ConfigFile.java:-1)
> > > >         33: dacapo/parser/ConfigFile.configFile()Ldacapo/parser/
> > > > Config; (ConfigFile.java:-1)
> > > >         34: dacapo/parser/Config.parse(Ljava/io/InputStream;)
> > > > Ldacapo/parser/Config; (Config.java:-1)
> > > >         35: dacapo/TestHarness.<init>(Ljava/io/InputStream;)V
> > > > (TestHarness.java:-1)
> > > >         36: dacapo/TestHarness.main([Ljava/lang/String;)V
> > > > (TestHarness.java:-1)
> > > >         37: vm_invoke_native_array_stub (/home/dcsfiles/neelakan/
> > > > Sandbox/Harmony/stable/working_vm/vm/vmcore/src/util/ia32/base/
> > > > invoke_native_stub_ia32.asm:41)
> > > >         38: JIT_execute_method_default(void*, _jmethodID*, jvalue*,
> > > > jvalue*) (/home/dcsfiles/neelakan/Sandbox/Harmony/stable/working_vm/
> > > > vm/vmcore/src/util/ia32/base/ini_iA32.cpp:199)
> > > >         39: DrlEMImpl::executeMethod(_jmethodID*, jvalue*, jvalue*)
> > > > (/home/dcsfiles/neelakan/Sandbox/Harmony/stable/working_vm/vm/em/
> > > > src/DrlEMImpl.cpp:514)
> > > >         40: ExecuteMethod (/home/dcsfiles/neelakan/Sandbox/Harmony/
> > > > stable/working_vm/vm/em/src/em_intf.cpp:43)
> > > >         41: vm_execute_java_method_array(_jmethodID*, jvalue*,
> > > > jvalue*) (/home/dcsfiles/neelakan/Sandbox/Harmony/stable/working_vm/
> > > > vm/vmcore/src/jit/ini.cpp:51)
> > > >         42: call_static_method_no_ref_result (/home/dcsfiles/
> > > > neelakan/Sandbox/Harmony/stable/working_vm/vm/vmcore/src/jni/
> > > > jni_method.cpp:1155)
> > > >         43: CallStaticVoidMethodA(JNIEnv_External*, _jobject*,
> > > > _jmethodID*, jvalue*) (/home/dcsfiles/neelakan/Sandbox/Harmony/
> > > > stable/working_vm/vm/vmcore/src/jni/jni_method.cpp:1563)
> > > >         44: invoke_primitive_method (/home/dcsfiles/neelakan/
> > > > Sandbox/Harmony/stable/working_vm/vm/vmcore/src/kernel_classes/
> > > > native/java_lang_reflect_VMReflection.cpp:184)
> > > > Segmentation fault
> > > >
> > > >
> > > > --
> > > > This message is automatically generated by JIRA.
> > > > -
> > > > If you think it was sent incorrectly contact one of the
> > > > administrators: https://issues.apache.org/jira/secure/
> > > > Administrators.jspa
> > > > -
> > > > For more information on JIRA, see: http://www.atlassian.com/
> > > > software/jira
> > > >
> > > >
> > >
> > >
> > >
>
> --
> Egor Pasko
>
>


-- 
Mikhail Fursov

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