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6652736: well known classes in system dictionary are inefficiently processed

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Combine many scalar variables into a single enum-indexed array in SystemDictionary.

Reviewed-by: kvn
This commit is contained in:
John R Rose 2008-04-29 19:45:22 -07:00
parent b05f95c5a9
commit bb7ccea4ff
8 changed files with 519 additions and 555 deletions
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15
hotspot/src/share/vm/classfile/javaClasses.hpp
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@ -45,9 +45,9 @@ class java_lang_String : AllStatic {
private:
enum {
hc_value_offset = 0,
hc_offset_offset = 1,
hc_count_offset = 2,
hc_hash_offset = 3
hc_offset_offset = 1
//hc_count_offset = 2 -- not a word-scaled offset
//hc_hash_offset = 3 -- not a word-scaled offset
};
static int value_offset;
@ -149,6 +149,9 @@ class java_lang_Class : AllStatic {
// Conversion
static klassOop as_klassOop(oop java_class);
// Testing
static bool is_instance(oop obj) {
return obj != NULL && obj->klass() == SystemDictionary::class_klass();
}
static bool is_primitive(oop java_class);
static BasicType primitive_type(oop java_class);
static oop primitive_mirror(BasicType t);
@ -651,13 +654,16 @@ class java_lang_boxing_object: AllStatic {
};
static int value_offset;
static oop initialize_and_allocate(klassOop klass, TRAPS);
static oop initialize_and_allocate(BasicType type, TRAPS);
public:
// Allocation. Returns a boxed value, or NULL for invalid type.
static oop create(BasicType type, jvalue* value, TRAPS);
// Accessors. Returns the basic type being boxed, or T_ILLEGAL for invalid oop.
static BasicType get_value(oop box, jvalue* value);
static BasicType set_value(oop box, jvalue* value);
static BasicType basic_type(oop box);
static bool is_instance(oop box) { return basic_type(box) != T_ILLEGAL; }
static bool is_instance(oop box, BasicType type) { return basic_type(box) == type; }
static int value_offset_in_bytes() { return value_offset; }
@ -921,6 +927,7 @@ class JavaClasses : AllStatic {
private:
static bool check_offset(const char *klass_name, int offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
static bool check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
static bool check_constant(const char *klass_name, int constant, const char *field_name, const char* field_sig) PRODUCT_RETURN0;
public:
static void compute_hard_coded_offsets();
static void compute_offsets();