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8176472: Lazily create ModuleEntryTable

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Moved the unnamed module out of the ModuleEntryTable and into the ClassLoaderData so that the MET can be lazily created only when other modules are present. Also a smaller PackageTable size.

Reviewed-by: gtriantafill, hseigel, lfoltan, coleenp
This commit is contained in:
Rachel Protacio 2017-04-18 13:19:42 -04:00
parent 2327609d91
commit ca72444bf9
9 changed files with 112 additions and 57 deletions
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hotspot/src/share/vm/classfile/classLoaderData.hpp
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@ -221,6 +221,7 @@ class ClassLoaderData : public CHeapObj<mtClass> {
Klass* volatile _klasses; // The classes defined by the class loader.
PackageEntryTable* volatile _packages; // The packages defined by the class loader.
ModuleEntry* _unnamed_module; // This class loader's unnamed module.
ModuleEntryTable* volatile _modules; // The modules defined by the class loader.
// These method IDs are created for the class loader and set to NULL when the
@ -348,6 +349,7 @@ class ClassLoaderData : public CHeapObj<mtClass> {
void init_dependencies(TRAPS);
PackageEntryTable* packages();
bool packages_defined() { return (_packages != NULL); }
ModuleEntry* unnamed_module() { return _unnamed_module; }
ModuleEntryTable* modules();
bool modules_defined() { return (_modules != NULL); }