Memory hoarding triggered by the TPluginManager

[pcanal]

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Description

As seen in art-framework-suite/art#142 the stack trace below is hoarding memory:

==201374== 672,560 bytes in 6,005 blocks are definitely lost in loss record 29,240 of 29,249
==201374==    at 0x4C2B15C: malloc (vg_replace_malloc.c:431)
==201374==    by 0xF344E725: clang::Parser::AnnotateTemplateIdToken(clang::OpaquePtr<clang::TemplateName>, clang::TemplateNameKind, clang::CXXScopeSpec&, clang::SourceLocation, clang::UnqualifiedId&, bool, bool) (in /cvmfs/mu2e.opensciencegrid.org/artexternals/root/v6_28_06b/Linux64bit+3.10-2.17-e28-p3915-prof/lib/libCling.so.6.28.06)
==201374==    by 0xF33E28E0: clang::Parser::ParseOptionalCXXScopeSpecifier(clang::CXXScopeSpec&, clang::OpaquePtr<clang::QualType>, bool, bool, bool*, bool, clang::IdentifierInfo**, bool, bool) (in /cvmfs/mu2e.opensciencegrid.org/artexternals/root/v6_28_06b/Linux64bit+3.10-2.17-e28-p3915-prof/lib/libCling.so.6.28.06)
==201374==    by 0xF345DBD2: clang::Parser::TryAnnotateCXXScopeToken(bool) (in /cvmfs/mu2e.opensciencegrid.org/artexternals/root/v6_28_06b/Linux64bit+3.10-2.17-e28-p3915-prof/lib/libCling.so.6.28.06)
==201374==    by 0xF2A57896: cling::LookupHelper::findScope(llvm::StringRef, cling::LookupHelper::DiagSetting, clang::Type const**, bool) const (in /cvmfs/mu2e.opensciencegrid.org/artexternals/root/v6_28_06b/Linux64bit+3.10-2.17-e28-p3915-prof/lib/libCling.so.6.28.06)
==201374==    by 0xF29824CD: GetClassSharedLibsForModule (TCling.cxx:6957)
==201374==    by 0xF29824CD: TCling::GetClassSharedLibs(char const*) (TCling.cxx:7061)
==201374==    by 0xF2965186: TCling::ShallowAutoLoadImpl(char const*) (TCling.cxx:6119)
==201374==    by 0xF2983220: TCling::DeepAutoLoadImpl(char const*, std::unordered_set<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >&, bool) (TCling.cxx:6172)
==201374==    by 0xF2983743: TCling::AutoLoad(char const*, bool) (TCling.cxx:6284)
==201374==    by 0xF29838A5: TCling::AutoLoad(std::type_info const&, bool) (TCling.cxx:6103)
==201374==    by 0x14EB2D47: TClass::GetClass(std::type_info const&, bool, bool, unsigned long, unsigned long) (TClass.cxx:3316)
==201374==    by 0x139AA957: GetClass (TClass.h:628)
==201374==    by 0x139AA957: GetClassHelper<std::tuple<char const*> > (TClass.h:644)
==201374==    by 0x139AA957: GetClass<std::tuple<char const*> > (TClass.h:654)
==201374==    by 0x139AA957: long TPluginHandler::ExecPluginImpl<char const*>(char const* const&) (TPluginManager.h:175)
==201374==    by 0x139A9B5C: ExecPlugin<char const*> (TPluginManager.h:218)
==201374==    by 0x139A9B5C: ROOT::Math::Factory::CreateMinimizer(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) (Factory.cxx:100)

Reproducer

See art-framework-suite/art#142

ROOT version

master, v6.30, v6.28

Installation method

from source

Operating system

All

Additional context

No response