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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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10
hotspot/src/share/vm/classfile/modules.cpp
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@ -478,13 +478,11 @@ void Modules::set_bootloader_unnamed_module(jobject module, TRAPS) {
log_debug(modules)("set_bootloader_unnamed_module(): recording unnamed module for boot loader");
// Ensure the boot loader's PackageEntryTable has been created
ModuleEntryTable* module_table = get_module_entry_table(h_loader, CHECK);
// Set java.lang.reflect.Module for the boot loader's unnamed module
ModuleEntry* unnamed_module = module_table->unnamed_module();
// Set java.lang.Module for the boot loader's unnamed module
ClassLoaderData* boot_loader_data = ClassLoaderData::the_null_class_loader_data();
ModuleEntry* unnamed_module = boot_loader_data->unnamed_module();
assert(unnamed_module != NULL, "boot loader's unnamed ModuleEntry not defined");
unnamed_module->set_module(ClassLoaderData::the_null_class_loader_data()->add_handle(module_handle));
unnamed_module->set_module(boot_loader_data->add_handle(module_handle));
// Store pointer to the ModuleEntry in the unnamed module's java.lang.reflect.Module object.
java_lang_reflect_Module::set_module_entry(module_handle(), unnamed_module);
}