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8047737: Move array component mirror to instance of java/lang/Class

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Add field in java.lang.Class for componentType to simplify oop processing in JVM

Reviewed-by: fparain, twisti
This commit is contained in:
Coleen Phillimore 2014-07-02 15:22:18 -04:00
parent c689cebe98
commit 60ec6dfa0c
3 changed files with 21 additions and 0 deletions
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17
hotspot/src/share/vm/classfile/javaClasses.cpp
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@ -618,6 +618,8 @@ void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
assert(comp_mirror.not_null(), "must have a mirror");
// Two-way link between the array klass and its component mirror:
// (array_klass) k -> mirror -> component_mirror -> array_klass -> k
set_component_mirror(mirror(), comp_mirror());
ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
set_array_klass(comp_mirror(), k());
} else {
@ -679,6 +681,16 @@ void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
java_class->obj_field_put(_protection_domain_offset, pd);
}
void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
if (_component_mirror_offset != 0) {
java_class->obj_field_put(_component_mirror_offset, comp_mirror);
}
}
oop java_lang_Class::component_mirror(oop java_class) {
assert(_component_mirror_offset != 0, "must be set");
return java_class->obj_field(_component_mirror_offset);
}
oop java_lang_Class::init_lock(oop java_class) {
assert(_init_lock_offset != 0, "must be set");
return java_class->obj_field(_init_lock_offset);
@ -875,6 +887,10 @@ void java_lang_Class::compute_offsets() {
klass_oop, vmSymbols::classLoader_name(),
vmSymbols::classloader_signature());
compute_optional_offset(_component_mirror_offset,
klass_oop, vmSymbols::componentType_name(),
vmSymbols::class_signature());
CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
}
@ -3097,6 +3113,7 @@ int java_lang_Class::_oop_size_offset;
int java_lang_Class::_static_oop_field_count_offset;
int java_lang_Class::_class_loader_offset;
int java_lang_Class::_protection_domain_offset;
int java_lang_Class::_component_mirror_offset;
int java_lang_Class::_init_lock_offset;
int java_lang_Class::_signers_offset;
GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;

3
hotspot/src/share/vm/classfile/javaClasses.hpp
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@ -241,6 +241,7 @@ class java_lang_Class : AllStatic {
static int _init_lock_offset;
static int _signers_offset;
static int _class_loader_offset;
static int _component_mirror_offset;
static bool offsets_computed;
static int classRedefinedCount_offset;
@ -250,6 +251,7 @@ class java_lang_Class : AllStatic {
static void set_init_lock(oop java_class, oop init_lock);
static void set_protection_domain(oop java_class, oop protection_domain);
static void set_class_loader(oop java_class, oop class_loader);
static void set_component_mirror(oop java_class, oop comp_mirror);
static void initialize_mirror_fields(KlassHandle k, Handle mirror, Handle protection_domain, TRAPS);
public:
static void compute_offsets();
@ -291,6 +293,7 @@ class java_lang_Class : AllStatic {
// Support for embedded per-class oops
static oop protection_domain(oop java_class);
static oop init_lock(oop java_class);
static oop component_mirror(oop java_class);
static objArrayOop signers(oop java_class);
static void set_signers(oop java_class, objArrayOop signers);

1
hotspot/src/share/vm/classfile/vmSymbols.hpp
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@ -573,6 +573,7 @@
template(serializeAgentPropertiesToByteArray_name, "serializeAgentPropertiesToByteArray") \
template(classRedefinedCount_name, "classRedefinedCount") \
template(classLoader_name, "classLoader") \
template(componentType_name, "componentType") \
\
/* trace signatures */ \
TRACE_TEMPLATES(template) \