a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halleyclass CheckedExceptionElement VALUE_OBJ_CLASS_SPEC {

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley public:

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u2 class_cp_index;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley};

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halleyclass LocalVariableTableElement VALUE_OBJ_CLASS_SPEC {

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley public:

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u2 start_bci;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u2 length;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u2 name_cp_index;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u2 descriptor_cp_index;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u2 signature_cp_index;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u2 slot;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley};

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halleyclass constMethodOopDesc : public oopDesc {

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley friend class constMethodKlass;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley friend class VMStructs;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halleyprivate:

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley enum {

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley _has_linenumber_table = 1,

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley _has_checked_exceptions = 2,

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley _has_localvariable_table = 4

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley };

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // Bit vector of signature

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // Callers interpret 0=not initialized yet and

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // -1=too many args to fix, must parse the slow way.

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // The real initial value is special to account for nonatomicity of 64 bit

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // loads and stores. This value may updated and read without a lock by

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // multiple threads, so is volatile.

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley volatile uint64_t _fingerprint;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley volatile bool _is_conc_safe; // if true, safe for concurrent GC processing

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halleypublic:

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley oop* oop_block_beg() const { return adr_method(); }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley oop* oop_block_end() const { return adr_exception_table() + 1; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halleyprivate:

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley //

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // The oop block. See comment in klass.hpp before making changes.

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley //

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence // Backpointer to non-const methodOop (needed for some JVMTI operations)

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley methodOop _method;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // Raw stackmap data for the method

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley typeArrayOop _stackmap_data;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // The exception handler table. 4-tuples of ints [start_pc, end_pc,

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // handler_pc, catch_type index] For methods with no exceptions the

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // table is pointing to Universe::the_empty_int_array

40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence typeArrayOop _exception_table;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley //

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // End of the oop block.

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley //

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley int _constMethod_size;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley jbyte _interpreter_kind;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley jbyte _flags;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence // Size of Java bytecodes allocated immediately after methodOop.

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u2 _code_size;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u2 _name_index; // Method name (index in constant pool)

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u2 _signature_index; // Method signature (index in constant pool)

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u2 _method_idnum; // unique identification number for the method within the class

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // initially corresponds to the index into the methods array.

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // but this may change with redefinition

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u2 _generic_signature_index; // Generic signature (index in constant pool, 0 if absent)

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halleypublic:

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // Inlined tables

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley void set_inlined_tables_length(int checked_exceptions_len,

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley int compressed_line_number_size,

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley int localvariable_table_len);

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley bool has_linenumber_table() const

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley { return (_flags & _has_linenumber_table) != 0; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley bool has_checked_exceptions() const

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley { return (_flags & _has_checked_exceptions) != 0; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley bool has_localvariable_table() const

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley { return (_flags & _has_localvariable_table) != 0; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley void set_interpreter_kind(int kind) { _interpreter_kind = kind; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley int interpreter_kind(void) const { return _interpreter_kind; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // backpointer to non-const methodOop

40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence methodOop method() const { return _method; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley void set_method(methodOop m) { oop_store_without_check((oop*)&_method, (oop) m); }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // stackmap table data

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley typeArrayOop stackmap_data() const { return _stackmap_data; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley void set_stackmap_data(typeArrayOop sd) {

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley oop_store_without_check((oop*)&_stackmap_data, (oop)sd);

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley bool has_stackmap_table() const { return _stackmap_data != NULL; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // exception handler table

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley typeArrayOop exception_table() const { return _exception_table; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley void set_exception_table(typeArrayOop e) { oop_store_without_check((oop*) &_exception_table, (oop) e); }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley bool has_exception_handler() const { return exception_table() != NULL && exception_table()->length() > 0; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley void init_fingerprint() {

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley const uint64_t initval = CONST64(0x8000000000000000);

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley _fingerprint = initval;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley uint64_t fingerprint() const {

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // Since reads aren't atomic for 64 bits, if any of the high or low order

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // word is the initial value, return 0. See init_fingerprint for initval.

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley uint high_fp = (uint)(_fingerprint >> 32);

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley if ((int) _fingerprint == 0 || high_fp == 0x80000000) {

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley return 0L;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley } else {

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley return _fingerprint;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley uint64_t set_fingerprint(uint64_t new_fingerprint) {

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley#ifdef ASSERT

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // Assert only valid if complete/valid 64 bit _fingerprint value is read.

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley uint64_t oldfp = fingerprint();

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley#endif // ASSERT

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley _fingerprint = new_fingerprint;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley assert(oldfp == 0L || new_fingerprint == oldfp,

40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence "fingerprint cannot change");

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley assert(((new_fingerprint >> 32) != 0x80000000) && (int)new_fingerprint !=0,

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley "fingerprint should call init to set initial value");

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley return new_fingerprint;

40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // name

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley int name_index() const { return _name_index; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley void set_name_index(int index) { _name_index = index; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence // signature

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley int signature_index() const { return _signature_index; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley void set_signature_index(int index) { _signature_index = index; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // generics support

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley int generic_signature_index() const { return _generic_signature_index; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley void set_generic_signature_index(int index) { _generic_signature_index = index; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // Sizing

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley static int header_size() {

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley return sizeof(constMethodOopDesc)/HeapWordSize;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // Object size needed

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley static int object_size(int code_size, int compressed_line_number_size,

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley int local_variable_table_length,

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley int checked_exceptions_length);

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley int object_size() const { return _constMethod_size; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley void set_constMethod_size(int size) { _constMethod_size = size; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // Is object parsable by gc

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley bool object_is_parsable() { return object_size() > 0; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // code size

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley int code_size() const { return _code_size; }

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley void set_code_size(int size) {

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley assert(max_method_code_size < (1 << 16),

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley "u2 is too small to hold method code size in general");

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley assert(0 <= size && size <= max_method_code_size, "invalid code size");

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley _code_size = size;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley }

40f53fa8d9c6a4fc38c0014495e7a42b08f52481David Lawrence

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // linenumber table - note that length is unknown until decompression,

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley // see class CompressedLineNumberReadStream.

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u_char* compressed_linenumber_table() const; // not preserved by gc

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u2* checked_exceptions_length_addr() const;

a5d43b72413db3edd6b36a58f9bdf2cf6ff692f2Bob Halley u2* localvariable_table_length_addr() const;

// checked exceptions

int checked_exceptions_length() const;

CheckedExceptionElement* checked_exceptions_start() const;

// localvariable table

int localvariable_table_length() const;

LocalVariableTableElement* localvariable_table_start() const;

// byte codes

address code_base() const { return (address) (this+1); }

address code_end() const { return code_base() + code_size(); }

bool contains(address bcp) const { return code_base() <= bcp

&& bcp < code_end(); }

// Offset to bytecodes

static ByteSize codes_offset()

{ return in_ByteSize(sizeof(constMethodOopDesc)); }

// interpreter support

static ByteSize exception_table_offset()

{ return byte_offset_of(constMethodOopDesc, _exception_table); }

// Garbage collection support

oop* adr_method() const { return (oop*)&_method; }

oop* adr_stackmap_data() const { return (oop*)&_stackmap_data; }

oop* adr_exception_table() const { return (oop*)&_exception_table; }

bool is_conc_safe() { return _is_conc_safe; }

void set_is_conc_safe(bool v) { _is_conc_safe = v; }

// Unique id for the method

static const u2 MAX_IDNUM;

static const u2 UNSET_IDNUM;

u2 method_idnum() const { return _method_idnum; }

void set_method_idnum(u2 idnum) { _method_idnum = idnum; }

private:

// Since the size of the compressed line number table is unknown, the

// offsets of the other variable sized sections are computed backwards

// from the end of the constMethodOop.

// First byte after constMethodOop

address constMethod_end() const

{ return (address)((oop*)this + _constMethod_size); }

// Last short in constMethodOop

u2* last_u2_element() const

{ return (u2*)constMethod_end() - 1; }

};