0N/A

1879N/A#ifndef SHARE_VM_OOPS_KLASSVTABLE_HPP

1879N/A#define SHARE_VM_OOPS_KLASSVTABLE_HPP

1879N/A

1879N/A#include "memory/allocation.hpp"

1879N/A#include "oops/oopsHierarchy.hpp"

1879N/A#include "runtime/handles.hpp"

1879N/A#include "utilities/growableArray.hpp"

1879N/A

0N/A

0N/A

0N/Aclass vtableEntry;

0N/A

0N/Aclass klassVtable : public ResourceObj {

0N/A KlassHandle _klass; // my klass

0N/A int _tableOffset; // offset of start of vtable data within klass

0N/A int _length; // length of vtable (number of entries)

0N/A#ifndef PRODUCT

0N/A int _verify_count; // to make verify faster

0N/A#endif

0N/A

0N/A // Ordering important, so greater_than (>) can be used as an merge operator.

0N/A enum AccessType {

0N/A acc_private = 0,

0N/A acc_package_private = 1,

0N/A acc_publicprotected = 2

0N/A };

0N/A

0N/A public:

0N/A klassVtable(KlassHandle h_klass, void* base, int length) : _klass(h_klass) {

0N/A _tableOffset = (address)base - (address)h_klass(); _length = length;

0N/A }

0N/A

0N/A // accessors

0N/A vtableEntry* table() const { return (vtableEntry*)(address(_klass()) + _tableOffset); }

0N/A KlassHandle klass() const { return _klass; }

0N/A int length() const { return _length; }

0N/A inline methodOop method_at(int i) const;

0N/A inline methodOop unchecked_method_at(int i) const;

0N/A inline oop* adr_method_at(int i) const;

0N/A

0N/A // searching; all methods return -1 if not found

0N/A int index_of(methodOop m) const { return index_of(m, _length); }

2062N/A int index_of_miranda(Symbol* name, Symbol* signature);

0N/A

0N/A void initialize_vtable(bool checkconstraints, TRAPS); // initialize vtable of a new klass

0N/A

2342N/A // CDS/RedefineClasses support - clear vtables so they can be reinitialized

2342N/A // at dump time. Clearing gives us an easy way to tell if the vtable has

2342N/A // already been reinitialized at dump time (see dump.cpp). Vtables can

2342N/A // be initialized at run time by RedefineClasses so dumping the right order

2342N/A // is necessary.

2342N/A void clear_vtable();

2342N/A bool is_initialized();

2342N/A

2342N/A // computes vtable length (in words) and the number of miranda methods

0N/A static void compute_vtable_size_and_num_mirandas(int &vtable_length, int &num_miranda_methods,

0N/A klassOop super, objArrayOop methods,

652N/A AccessFlags class_flags, Handle classloader,

2062N/A Symbol* classname, objArrayOop local_interfaces,

652N/A TRAPS);

0N/A

0N/A // RedefineClasses() API support:

0N/A // If any entry of this vtable points to any of old_methods,

0N/A // replace it with the corresponding new_method.

0N/A // trace_name_printed is set to true if the current call has

0N/A // printed the klass name so that other routines in the adjust_*

0N/A // group don't print the klass name.

0N/A void adjust_method_entries(methodOop* old_methods, methodOop* new_methods,

0N/A int methods_length, bool * trace_name_printed);

4185N/A bool check_no_old_or_obsolete_entries();

4185N/A void dump_vtable();

0N/A

0N/A // Garbage collection

0N/A void oop_follow_contents();

0N/A void oop_adjust_pointers();

0N/A

0N/A#ifndef SERIALGC

0N/A // Parallel Old

0N/A void oop_follow_contents(ParCompactionManager* cm);

0N/A void oop_update_pointers(ParCompactionManager* cm);

0N/A#endif // SERIALGC

0N/A

0N/A // Iterators

0N/A void oop_oop_iterate(OopClosure* blk);

0N/A void oop_oop_iterate_m(OopClosure* blk, MemRegion mr);

0N/A

0N/A // Debugging code

0N/A void print() PRODUCT_RETURN;

0N/A void verify(outputStream* st, bool force = false);

0N/A static void print_statistics() PRODUCT_RETURN;

0N/A

0N/A protected:

0N/A friend class vtableEntry;

0N/A private:

652N/A enum { VTABLE_TRANSITIVE_OVERRIDE_VERSION = 51 } ;

0N/A void copy_vtable_to(vtableEntry* start);

0N/A int initialize_from_super(KlassHandle super);

0N/A int index_of(methodOop m, int len) const; // same as index_of, but search only up to len

0N/A void put_method_at(methodOop m, int index);

2062N/A static bool needs_new_vtable_entry(methodHandle m, klassOop super, Handle classloader, Symbol* classname, AccessFlags access_flags, TRAPS);

0N/A

652N/A bool update_inherited_vtable(instanceKlass* klass, methodHandle target_method, int super_vtable_len, bool checkconstraints, TRAPS);

652N/A instanceKlass* find_transitive_override(instanceKlass* initialsuper, methodHandle target_method, int vtable_index,

2062N/A Handle target_loader, Symbol* target_classname, Thread* THREAD);

0N/A

0N/A // support for miranda methods

0N/A bool is_miranda_entry_at(int i);

0N/A void fill_in_mirandas(int& initialized);

0N/A static bool is_miranda(methodOop m, objArrayOop class_methods, klassOop super);

0N/A static void add_new_mirandas_to_list(GrowableArray<methodOop>* list_of_current_mirandas, objArrayOop current_interface_methods, objArrayOop class_methods, klassOop super);

0N/A static void get_mirandas(GrowableArray<methodOop>* mirandas, klassOop super, objArrayOop class_methods, objArrayOop local_interfaces);

0N/A static int get_num_mirandas(klassOop super, objArrayOop class_methods, objArrayOop local_interfaces);

0N/A

0N/A

0N/A void verify_against(outputStream* st, klassVtable* vt, int index);

0N/A inline instanceKlass* ik() const;

0N/A};

0N/A

0N/A

0N/Aclass vtableEntry VALUE_OBJ_CLASS_SPEC {

0N/A public:

0N/A // size in words

0N/A static int size() {

0N/A return sizeof(vtableEntry) / sizeof(HeapWord);

0N/A }

0N/A static int method_offset_in_bytes() { return offset_of(vtableEntry, _method); }

0N/A methodOop method() const { return _method; }

0N/A

0N/A private:

0N/A methodOop _method;

0N/A void set(methodOop method) { assert(method != NULL, "use clear"); _method = method; }

0N/A void clear() { _method = NULL; }

0N/A void print() PRODUCT_RETURN;

0N/A void verify(klassVtable* vt, outputStream* st);

0N/A

0N/A friend class klassVtable;

0N/A};

0N/A

0N/A

0N/Ainline methodOop klassVtable::method_at(int i) const {

0N/A assert(i >= 0 && i < _length, "index out of bounds");

0N/A assert(table()[i].method() != NULL, "should not be null");

0N/A assert(oop(table()[i].method())->is_method(), "should be method");

0N/A return table()[i].method();

0N/A}

0N/A

0N/Ainline methodOop klassVtable::unchecked_method_at(int i) const {

0N/A assert(i >= 0 && i < _length, "index out of bounds");

0N/A return table()[i].method();

0N/A}

0N/A

0N/Ainline oop* klassVtable::adr_method_at(int i) const {

0N/A // Allow one past the last entry to be referenced; useful for loop bounds.

0N/A assert(i >= 0 && i <= _length, "index out of bounds");

0N/A return (oop*)(address(table() + i) + vtableEntry::method_offset_in_bytes());

0N/A}

0N/A

0N/Aclass klassItable;

0N/Aclass itableMethodEntry;

0N/A

0N/Aclass itableOffsetEntry VALUE_OBJ_CLASS_SPEC {

0N/A private:

0N/A klassOop _interface;

0N/A int _offset;

0N/A public:

0N/A klassOop interface_klass() const { return _interface; }

0N/A int offset() const { return _offset; }

0N/A

0N/A static itableMethodEntry* method_entry(klassOop k, int offset) { return (itableMethodEntry*)(((address)k) + offset); }

0N/A itableMethodEntry* first_method_entry(klassOop k) { return method_entry(k, _offset); }

0N/A

0N/A void initialize(klassOop interf, int offset) { _interface = interf; _offset = offset; }

0N/A

0N/A // Static size and offset accessors

0N/A static int size() { return sizeof(itableOffsetEntry) / HeapWordSize; } // size in words

0N/A static int interface_offset_in_bytes() { return offset_of(itableOffsetEntry, _interface); }

0N/A static int offset_offset_in_bytes() { return offset_of(itableOffsetEntry, _offset); }

0N/A

0N/A friend class klassItable;

0N/A};

0N/A

0N/A

0N/Aclass itableMethodEntry VALUE_OBJ_CLASS_SPEC {

0N/A private:

0N/A methodOop _method;

0N/A

0N/A public:

0N/A methodOop method() const { return _method; }

0N/A

0N/A void clear() { _method = NULL; }

0N/A

0N/A void initialize(methodOop method);

0N/A

0N/A // Static size and offset accessors

0N/A static int size() { return sizeof(itableMethodEntry) / HeapWordSize; } // size in words

0N/A static int method_offset_in_bytes() { return offset_of(itableMethodEntry, _method); }

0N/A

0N/A friend class klassItable;

0N/A};

0N/A

0N/Aclass klassItable : public ResourceObj {

0N/A private:

0N/A instanceKlassHandle _klass; // my klass

0N/A int _table_offset; // offset of start of itable data within klass (in words)

0N/A int _size_offset_table; // size of offset table (in itableOffset entries)

0N/A int _size_method_table; // size of methodtable (in itableMethodEntry entries)

0N/A

0N/A void initialize_itable_for_interface(int method_table_offset, KlassHandle interf_h, bool checkconstraints, TRAPS);

0N/A public:

0N/A klassItable(instanceKlassHandle klass);

0N/A

0N/A itableOffsetEntry* offset_entry(int i) { assert(0 <= i && i <= _size_offset_table, "index out of bounds");

0N/A return &((itableOffsetEntry*)vtable_start())[i]; }

0N/A

0N/A itableMethodEntry* method_entry(int i) { assert(0 <= i && i <= _size_method_table, "index out of bounds");

0N/A return &((itableMethodEntry*)method_start())[i]; }

0N/A

16N/A int size_offset_table() { return _size_offset_table; }

0N/A

0N/A // Initialization

0N/A void initialize_itable(bool checkconstraints, TRAPS);

0N/A

0N/A // Updates

0N/A void initialize_with_method(methodOop m);

0N/A

0N/A // RedefineClasses() API support:

0N/A // if any entry of this itable points to any of old_methods,

0N/A // replace it with the corresponding new_method.

0N/A // trace_name_printed is set to true if the current call has

0N/A // printed the klass name so that other routines in the adjust_*

0N/A // group don't print the klass name.

0N/A void adjust_method_entries(methodOop* old_methods, methodOop* new_methods,

0N/A int methods_length, bool * trace_name_printed);

4185N/A bool check_no_old_or_obsolete_entries();

4185N/A void dump_itable();

0N/A

0N/A // Garbage collection

0N/A void oop_follow_contents();

0N/A void oop_adjust_pointers();

0N/A

0N/A#ifndef SERIALGC

0N/A // Parallel Old

0N/A void oop_follow_contents(ParCompactionManager* cm);

0N/A void oop_update_pointers(ParCompactionManager* cm);

0N/A#endif // SERIALGC

0N/A

0N/A // Iterators

0N/A void oop_oop_iterate(OopClosure* blk);

0N/A void oop_oop_iterate_m(OopClosure* blk, MemRegion mr);

0N/A

0N/A // Setup of itable

0N/A static int compute_itable_size(objArrayHandle transitive_interfaces);

0N/A static void setup_itable_offset_table(instanceKlassHandle klass);

0N/A

0N/A // Resolving of method to index

0N/A static int compute_itable_index(methodOop m);

665N/A // ...and back again:

665N/A static methodOop method_for_itable_index(klassOop klass, int itable_index);

0N/A

0N/A // Debugging/Statistics

0N/A static void print_statistics() PRODUCT_RETURN;

0N/A private:

0N/A intptr_t* vtable_start() const { return ((intptr_t*)_klass()) + _table_offset; }

0N/A intptr_t* method_start() const { return vtable_start() + _size_offset_table * itableOffsetEntry::size(); }

0N/A

0N/A // Helper methods

0N/A static int calc_itable_size(int num_interfaces, int num_methods) { return (num_interfaces * itableOffsetEntry::size()) + (num_methods * itableMethodEntry::size()); }

0N/A

0N/A // Statistics

0N/A NOT_PRODUCT(static int _total_classes;) // Total no. of classes with itables

0N/A NOT_PRODUCT(static long _total_size;) // Total no. of bytes used for itables

0N/A

0N/A static void update_stats(int size) PRODUCT_RETURN NOT_PRODUCT({ _total_classes++; _total_size += size; })

0N/A};

1879N/A

1879N/A#endif // SHARE_VM_OOPS_KLASSVTABLE_HPP