Review Request 125186: limite the max search depth for oldcpp::CodeCompletionContext::addOverridableItems()

[Zhang HuiJie]

> On 九月 19, 2015, 4:14 a.m., Milian Wolff wrote:
> > Hey Zhang, you now have a developer account, right? Can you commit this change then?

Sorry for my late and thank you very much!


- Zhang


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On 九月 19, 2015, 1:58 p.m., Zhang HuiJie wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/125186/
> -----------------------------------------------------------
> 
> (Updated 九月 19, 2015, 1:58 p.m.)
> 
> 
> Review request for KDevelop.
> 
> 
> Repository: kdevelop
> 
> 
> Description
> -------
> 
> In some cases for big projects, oldcpp::CodeCompletionContext::addOverridableItems() may get into an endless loop and finally kdevelop breakdown. The debug ouput show that the depth was more than 50000.
> 
> 
> Diffs
> -----
> 
>   languages/cpp/codecompletion/context.cpp 81927f9 
> 
> Diff: https://git.reviewboard.kde.org/r/125186/diff/
> 
> 
> Testing
> -------
> 
> Here is the debug output:
> 
> 0x00007ffff18ab995 in KDevelop::AbstractType::hash (this=this at entry=0x7fff181991c0) at /build/buildd/kdevplatform-1.7.1/language/duchain/types/abstracttype.cpp:110
> 110	/build/buildd/kdevplatform-1.7.1/language/duchain/types/abstracttype.cpp: No such file or directory.
> (gdb) where
> #0  0x00007ffff18ab995 in KDevelop::AbstractType::hash (this=this at entry=0x7fff181991c0) at /build/buildd/kdevplatform-1.7.1/language/duchain/types/abstracttype.cpp:110
> #1  0x00007ffff18afde6 in KDevelop::FunctionType::hash (this=0x7fff181991c0) at /build/buildd/kdevplatform-1.7.1/language/duchain/types/functiontype.cpp:188
> #2  0x00007ffff18ca077 in hash (this=0x7fff1fec41e0) at /build/buildd/kdevplatform-1.7.1/language/duchain/repositories/typerepository.cpp:45
> #3  KDevelop::ItemRepository<KDevelop::AbstractTypeData, KDevelop::AbstractTypeDataRequest, true, true, 0u, 1048576u>::index (this=0xc256b0, request=...)
>     at /build/buildd/kdevplatform-1.7.1/language/duchain/repositories/itemrepository.h:1141
> #4  0x00007ffff18c332a in KDevelop::TypeRepository::indexForType (input=...) at /build/buildd/kdevplatform-1.7.1/language/duchain/repositories/typerepository.cpp:107
> #5  0x00007ffff18abc60 in KDevelop::AbstractType::indexed (this=<optimized out>) at /build/buildd/kdevplatform-1.7.1/language/duchain/types/abstracttype.cpp:99
> #6  0x00007ffff17ff354 in KDevelop::DUContext::Checker::check (this=this at entry=0x7fff1fec42f0, declaration=declaration at entry=0x7fff04f84a00)
>     at /build/buildd/kdevplatform-1.7.1/language/duchain/ducontext.cpp:635
> #7  0x00007ffff17ffa8c in KDevelop::DUContext::findLocalDeclarationsInternal (this=0x34d6650, identifier=..., position=..., dataType=..., ret=..., flags=...)
>     at /build/buildd/kdevplatform-1.7.1/language/duchain/ducontext.cpp:681
> #8  0x00007fff20982761 in Cpp::CppDUContext<KDevelop::DUContext>::findLocalDeclarationsInternal (this=0x34d6650, identifier=..., position=..., dataType=..., ret=..., source=0x0, 
>     flags=...) at /home/cfd/Projects/KDE/Kdevelop/languages/cpp/cppduchain/cppducontext.h:388
> #9  0x00007ffff17fe2b4 in KDevelop::DUContext::findLocalDeclarations (this=0x34d6650, identifier=..., position=..., topContext=<optimized out>, dataType=..., flags=...)
>     at /build/buildd/kdevplatform-1.7.1/language/duchain/ducontext.cpp:585
> #10 0x00007fff20ed30f8 in Cpp::getOverridable (base=0x7fff04f84a00, current=0x7fff1fec3ffc, overridable=..., 
>     completionContext=<error reading variable: Cannot access memory at address 0x0>, depth=55472) at /home/cfd/Projects/KDE/Kdevelop/languages/cpp/codecompletion/context.cpp:1304
> #11 0x00007fff20ed34cf in Cpp::getOverridable (base=0x34d6650, current=0x7fff1fec3ffc, overridable=..., 
>     completionContext=<error reading variable: Cannot access memory at address 0x0>, depth=55472) at /home/cfd/Projects/KDE/Kdevelop/languages/cpp/codecompletion/context.cpp:1310
> #12 0x00007fff20ed34cf in Cpp::getOverridable (base=0x34d6650, current=0x7fff1fec3ffc, overridable=..., 
>     completionContext=<error reading variable: Cannot access memory at address 0x0>, depth=55472) at /home/cfd/Projects/KDE/Kdevelop/languages/cpp/codecompletion/context.cpp:1310
> 
> 
> Thanks,
> 
> Zhang HuiJie
> 
>

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