hotspot/src/share/vm/oops/methodOop.hpp
changeset 1 489c9b5090e2
child 221 ec745a0fe922
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/oops/methodOop.hpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,739 @@
+/*
+ * Copyright 1997-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+// A methodOop represents a Java method.
+//
+// Memory layout (each line represents a word). Note that most applications load thousands of methods,
+// so keeping the size of this structure small has a big impact on footprint.
+//
+// We put all oops and method_size first for better gc cache locality.
+//
+// The actual bytecodes are inlined after the end of the methodOopDesc struct.
+//
+// There are bits in the access_flags telling whether inlined tables are present.
+// Note that accessing the line number and local variable tables is not performance critical at all.
+// Accessing the checked exceptions table is used by reflection, so we put that last to make access
+// to it fast.
+//
+// The line number table is compressed and inlined following the byte codes. It is found as the first
+// byte following the byte codes. The checked exceptions table and the local variable table are inlined
+// after the line number table, and indexed from the end of the method. We do not compress the checked
+// exceptions table since the average length is less than 2, and do not bother to compress the local
+// variable table either since it is mostly absent.
+//
+// Note that native_function and signature_handler has to be at fixed offsets (required by the interpreter)
+//
+// |------------------------------------------------------|
+// | header                                               |
+// | klass                                                |
+// |------------------------------------------------------|
+// | constMethodOop                 (oop)                 |
+// | constants                      (oop)                 |
+// |------------------------------------------------------|
+// | methodData                     (oop)                 |
+// | interp_invocation_count                              |
+// |------------------------------------------------------|
+// | access_flags                                         |
+// | vtable_index                                         |
+// |------------------------------------------------------|
+// | result_index (C++ interpreter only)                  |
+// |------------------------------------------------------|
+// | method_size             | max_stack                  |
+// | max_locals              | size_of_parameters         |
+// |------------------------------------------------------|
+// | intrinsic_id, highest_tier  |       (unused)         |
+// |------------------------------------------------------|
+// | throwout_count          | num_breakpoints            |
+// |------------------------------------------------------|
+// | invocation_counter                                   |
+// | backedge_counter                                     |
+// |------------------------------------------------------|
+// | code                           (pointer)             |
+// | i2i                            (pointer)             |
+// | adapter                        (pointer)             |
+// | from_compiled_entry            (pointer)             |
+// | from_interpreted_entry         (pointer)             |
+// |------------------------------------------------------|
+// | native_function       (present only if native)       |
+// | signature_handler     (present only if native)       |
+// |------------------------------------------------------|
+
+
+class CheckedExceptionElement;
+class LocalVariableTableElement;
+class AdapterHandlerEntry;
+
+class methodDataOopDesc;
+
+class methodOopDesc : public oopDesc {
+ friend class methodKlass;
+ friend class VMStructs;
+ private:
+  constMethodOop    _constMethod;                // Method read-only data.
+  constantPoolOop   _constants;                  // Constant pool
+  methodDataOop     _method_data;
+  int               _interpreter_invocation_count; // Count of times invoked
+  AccessFlags       _access_flags;               // Access flags
+  int               _vtable_index;               // vtable index of this method (see VtableIndexFlag)
+                                                 // note: can have vtables with >2**16 elements (because of inheritance)
+#ifdef CC_INTERP
+  int               _result_index;               // C++ interpreter needs for converting results to/from stack
+#endif
+  u2                _method_size;                // size of this object
+  u2                _max_stack;                  // Maximum number of entries on the expression stack
+  u2                _max_locals;                 // Number of local variables used by this method
+  u2                _size_of_parameters;         // size of the parameter block (receiver + arguments) in words
+  u1                _intrinsic_id_cache;         // Cache for intrinsic_id; 0 or 1+vmInt::ID
+  u1                _highest_tier_compile;       // Highest compile level this method has ever seen.
+  u2                _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
+  u2                _number_of_breakpoints;      // fullspeed debugging support
+  InvocationCounter _invocation_counter;         // Incremented before each activation of the method - used to trigger frequency-based optimizations
+  InvocationCounter _backedge_counter;           // Incremented before each backedge taken - used to trigger frequencey-based optimizations
+#ifndef PRODUCT
+  int               _compiled_invocation_count;  // Number of nmethod invocations so far (for perf. debugging)
+#endif
+  // Entry point for calling both from and to the interpreter.
+  address _i2i_entry;           // All-args-on-stack calling convention
+  // Adapter blob (i2c/c2i) for this methodOop. Set once when method is linked.
+  AdapterHandlerEntry* _adapter;
+  // Entry point for calling from compiled code, to compiled code if it exists
+  // or else the interpreter.
+  volatile address _from_compiled_entry;        // Cache of: _code ? _code->entry_point() : _adapter->c2i_entry()
+  // The entry point for calling both from and to compiled code is
+  // "_code->entry_point()".  Because of tiered compilation and de-opt, this
+  // field can come and go.  It can transition from NULL to not-null at any
+  // time (whenever a compile completes).  It can transition from not-null to
+  // NULL only at safepoints (because of a de-opt).
+  nmethod* volatile _code;                       // Points to the corresponding piece of native code
+  volatile address           _from_interpreted_entry; // Cache of _code ? _adapter->i2c_entry() : _i2i_entry
+
+ public:
+  // accessors for instance variables
+  constMethodOop constMethod() const             { return _constMethod; }
+  void set_constMethod(constMethodOop xconst)    { oop_store_without_check((oop*)&_constMethod, (oop)xconst); }
+
+
+  static address make_adapters(methodHandle mh, TRAPS);
+  volatile address from_compiled_entry() const   { return (address)OrderAccess::load_ptr_acquire(&_from_compiled_entry); }
+  volatile address from_interpreted_entry() const{ return (address)OrderAccess::load_ptr_acquire(&_from_interpreted_entry); }
+
+  // access flag
+  AccessFlags access_flags() const               { return _access_flags;  }
+  void set_access_flags(AccessFlags flags)       { _access_flags = flags; }
+
+  // name
+  symbolOop name() const                         { return _constants->symbol_at(name_index()); }
+  int name_index() const                         { return constMethod()->name_index();         }
+  void set_name_index(int index)                 { constMethod()->set_name_index(index);       }
+
+  // signature
+  symbolOop signature() const                    { return _constants->symbol_at(signature_index()); }
+  int signature_index() const                    { return constMethod()->signature_index();         }
+  void set_signature_index(int index)            { constMethod()->set_signature_index(index);       }
+
+  // generics support
+  symbolOop generic_signature() const            { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (symbolOop)NULL); }
+  int generic_signature_index() const            { return constMethod()->generic_signature_index(); }
+  void set_generic_signature_index(int index)    { constMethod()->set_generic_signature_index(index); }
+
+  // annotations support
+  typeArrayOop annotations() const               { return instanceKlass::cast(method_holder())->get_method_annotations_of(method_idnum()); }
+  typeArrayOop parameter_annotations() const     { return instanceKlass::cast(method_holder())->get_method_parameter_annotations_of(method_idnum()); }
+  typeArrayOop annotation_default() const        { return instanceKlass::cast(method_holder())->get_method_default_annotations_of(method_idnum()); }
+
+#ifdef CC_INTERP
+  void set_result_index(BasicType type);
+  int  result_index()                            { return _result_index; }
+#endif
+
+  // Helper routine: get klass name + "." + method name + signature as
+  // C string, for the purpose of providing more useful NoSuchMethodErrors
+  // and fatal error handling. The string is allocated in resource
+  // area if a buffer is not provided by the caller.
+  char* name_and_sig_as_C_string();
+  char* name_and_sig_as_C_string(char* buf, int size);
+
+  // Static routine in the situations we don't have a methodOop
+  static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature);
+  static char* name_and_sig_as_C_string(Klass* klass, symbolOop method_name, symbolOop signature, char* buf, int size);
+
+  // JVMTI breakpoints
+  Bytecodes::Code orig_bytecode_at(int bci);
+  void        set_orig_bytecode_at(int bci, Bytecodes::Code code);
+  void set_breakpoint(int bci);
+  void clear_breakpoint(int bci);
+  void clear_all_breakpoints();
+  // Tracking number of breakpoints, for fullspeed debugging.
+  // Only mutated by VM thread.
+  u2   number_of_breakpoints() const             { return _number_of_breakpoints; }
+  void incr_number_of_breakpoints()              { ++_number_of_breakpoints; }
+  void decr_number_of_breakpoints()              { --_number_of_breakpoints; }
+  // Initialization only
+  void clear_number_of_breakpoints()             { _number_of_breakpoints = 0; }
+
+  // index into instanceKlass methods() array
+  u2 method_idnum() const           { return constMethod()->method_idnum(); }
+  void set_method_idnum(u2 idnum)   { constMethod()->set_method_idnum(idnum); }
+
+  // code size
+  int code_size() const                  { return constMethod()->code_size(); }
+
+  // method size
+  int method_size() const                        { return _method_size; }
+  void set_method_size(int size) {
+    assert(0 <= size && size < (1 << 16), "invalid method size");
+    _method_size = size;
+  }
+
+  // constant pool for klassOop holding this method
+  constantPoolOop constants() const              { return _constants; }
+  void set_constants(constantPoolOop c)          { oop_store_without_check((oop*)&_constants, c); }
+
+  // max stack
+  int  max_stack() const                         { return _max_stack; }
+  void set_max_stack(int size)                   { _max_stack = size; }
+
+  // max locals
+  int  max_locals() const                        { return _max_locals; }
+  void set_max_locals(int size)                  { _max_locals = size; }
+  int highest_tier_compile()                     { return _highest_tier_compile;}
+  void set_highest_tier_compile(int level)      { _highest_tier_compile = level;}
+
+  void clear_intrinsic_id_cache() { _intrinsic_id_cache = 0; }
+
+  // Count of times method was exited via exception while interpreting
+  void interpreter_throwout_increment() {
+    if (_interpreter_throwout_count < 65534) {
+      _interpreter_throwout_count++;
+    }
+  }
+
+  int  interpreter_throwout_count() const        { return _interpreter_throwout_count; }
+  void set_interpreter_throwout_count(int count) { _interpreter_throwout_count = count; }
+
+  // size of parameters
+  int  size_of_parameters() const                { return _size_of_parameters; }
+
+  bool has_stackmap_table() const {
+    return constMethod()->has_stackmap_table();
+  }
+
+  typeArrayOop stackmap_data() const {
+    return constMethod()->stackmap_data();
+  }
+
+  // exception handler table
+  typeArrayOop exception_table() const
+                                   { return constMethod()->exception_table(); }
+  void set_exception_table(typeArrayOop e)
+                                     { constMethod()->set_exception_table(e); }
+  bool has_exception_handler() const
+                             { return constMethod()->has_exception_handler(); }
+
+  // Finds the first entry point bci of an exception handler for an
+  // exception of klass ex_klass thrown at throw_bci. A value of NULL
+  // for ex_klass indicates that the exception klass is not known; in
+  // this case it matches any constraint class. Returns -1 if the
+  // exception cannot be handled in this method. The handler
+  // constraint classes are loaded if necessary. Note that this may
+  // throw an exception if loading of the constraint classes causes
+  // an IllegalAccessError (bugid 4307310) or an OutOfMemoryError.
+  // If an exception is thrown, returns the bci of the
+  // exception handler which caused the exception to be thrown, which
+  // is needed for proper retries. See, for example,
+  // InterpreterRuntime::exception_handler_for_exception.
+  int fast_exception_handler_bci_for(KlassHandle ex_klass, int throw_bci, TRAPS);
+
+  // method data access
+  methodDataOop method_data() const              {
+    return _method_data;
+  }
+  void set_method_data(methodDataOop data)       {
+    oop_store_without_check((oop*)&_method_data, (oop)data);
+  }
+
+  // invocation counter
+  InvocationCounter* invocation_counter()        { return &_invocation_counter; }
+  InvocationCounter* backedge_counter()          { return &_backedge_counter; }
+  int invocation_count() const                   { return _invocation_counter.count(); }
+  int backedge_count() const                     { return _backedge_counter.count(); }
+  bool was_executed_more_than(int n) const;
+  bool was_never_executed() const                { return !was_executed_more_than(0); }
+
+  static void build_interpreter_method_data(methodHandle method, TRAPS);
+
+  int interpreter_invocation_count() const       { return _interpreter_invocation_count; }
+  void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; }
+  int increment_interpreter_invocation_count() { return ++_interpreter_invocation_count; }
+
+#ifndef PRODUCT
+  int  compiled_invocation_count() const         { return _compiled_invocation_count; }
+  void set_compiled_invocation_count(int count)  { _compiled_invocation_count = count; }
+#endif // not PRODUCT
+
+  // Clear (non-shared space) pointers which could not be relevent
+  // if this (shared) method were mapped into another JVM.
+  void remove_unshareable_info();
+
+  // nmethod/verified compiler entry
+  address verified_code_entry();
+  bool check_code() const;      // Not inline to avoid circular ref
+  nmethod* volatile code() const                 { assert( check_code(), "" ); return (nmethod *)OrderAccess::load_ptr_acquire(&_code); }
+  void clear_code();            // Clear out any compiled code
+  void set_code(methodHandle mh, nmethod* code);
+  void set_adapter_entry(AdapterHandlerEntry* adapter) {  _adapter = adapter; }
+  address get_i2c_entry();
+  address get_c2i_entry();
+  address get_c2i_unverified_entry();
+  AdapterHandlerEntry* adapter() {  return _adapter; }
+  // setup entry points
+  void link_method(methodHandle method, TRAPS);
+  // clear entry points. Used by sharing code
+  void unlink_method();
+
+  // vtable index
+  enum VtableIndexFlag {
+    // Valid vtable indexes are non-negative (>= 0).
+    // These few negative values are used as sentinels.
+    invalid_vtable_index    = -4,  // distinct from any valid vtable index
+    garbage_vtable_index    = -3,  // not yet linked; no vtable layout yet
+    nonvirtual_vtable_index = -2   // there is no need for vtable dispatch
+    // 6330203 Note:  Do not use -1, which was overloaded with many meanings.
+  };
+  DEBUG_ONLY(bool valid_vtable_index() const     { return _vtable_index >= nonvirtual_vtable_index; })
+  int  vtable_index() const                      { assert(valid_vtable_index(), "");
+                                                   return _vtable_index; }
+  void set_vtable_index(int index)               { _vtable_index = index; }
+
+  // interpreter entry
+  address interpreter_entry() const              { return _i2i_entry; }
+  // Only used when first initialize so we can set _i2i_entry and _from_interpreted_entry
+  void set_interpreter_entry(address entry)      { _i2i_entry = entry;  _from_interpreted_entry = entry; }
+  int  interpreter_kind(void) {
+     return constMethod()->interpreter_kind();
+  }
+  void set_interpreter_kind();
+  void set_interpreter_kind(int kind) {
+    constMethod()->set_interpreter_kind(kind);
+  }
+
+  // native function (used for native methods only)
+  enum {
+    native_bind_event_is_interesting = true
+  };
+  address native_function() const                { return *(native_function_addr()); }
+  // Must specify a real function (not NULL).
+  // Use clear_native_function() to unregister.
+  void set_native_function(address function, bool post_event_flag);
+  bool has_native_function() const;
+  void clear_native_function();
+
+  // signature handler (used for native methods only)
+  address signature_handler() const              { return *(signature_handler_addr()); }
+  void set_signature_handler(address handler);
+
+  // Interpreter oopmap support
+  void mask_for(int bci, InterpreterOopMap* mask);
+
+#ifndef PRODUCT
+  // operations on invocation counter
+  void print_invocation_count() const;
+#endif
+
+  // byte codes
+  address code_base() const           { return constMethod()->code_base(); }
+  bool    contains(address bcp) const { return constMethod()->contains(bcp); }
+
+  // prints byte codes
+  void print_codes() const            { print_codes_on(tty); }
+  void print_codes_on(outputStream* st) const                      PRODUCT_RETURN;
+  void print_codes_on(int from, int to, outputStream* st) const    PRODUCT_RETURN;
+
+  // checked exceptions
+  int checked_exceptions_length() const
+                         { return constMethod()->checked_exceptions_length(); }
+  CheckedExceptionElement* checked_exceptions_start() const
+                          { return constMethod()->checked_exceptions_start(); }
+
+  // localvariable table
+  bool has_localvariable_table() const
+                          { return constMethod()->has_localvariable_table(); }
+  int localvariable_table_length() const
+                        { return constMethod()->localvariable_table_length(); }
+  LocalVariableTableElement* localvariable_table_start() const
+                         { return constMethod()->localvariable_table_start(); }
+
+  bool has_linenumber_table() const
+                              { return constMethod()->has_linenumber_table(); }
+  u_char* compressed_linenumber_table() const
+                       { return constMethod()->compressed_linenumber_table(); }
+
+  // method holder (the klassOop holding this method)
+  klassOop method_holder() const                 { return _constants->pool_holder(); }
+
+  void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments)
+  symbolOop klass_name() const;                  // returns the name of the method holder
+  BasicType result_type() const;                 // type of the method result
+  int result_type_index() const;                 // type index of the method result
+  bool is_returning_oop() const                  { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); }
+  bool is_returning_fp() const                   { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); }
+
+  // Checked exceptions thrown by this method (resolved to mirrors)
+  objArrayHandle resolved_checked_exceptions(TRAPS) { return resolved_checked_exceptions_impl(this, THREAD); }
+
+  // Access flags
+  bool is_public() const                         { return access_flags().is_public();      }
+  bool is_private() const                        { return access_flags().is_private();     }
+  bool is_protected() const                      { return access_flags().is_protected();   }
+  bool is_package_private() const                { return !is_public() && !is_private() && !is_protected(); }
+  bool is_static() const                         { return access_flags().is_static();      }
+  bool is_final() const                          { return access_flags().is_final();       }
+  bool is_synchronized() const                   { return access_flags().is_synchronized();}
+  bool is_native() const                         { return access_flags().is_native();      }
+  bool is_abstract() const                       { return access_flags().is_abstract();    }
+  bool is_strict() const                         { return access_flags().is_strict();      }
+  bool is_synthetic() const                      { return access_flags().is_synthetic();   }
+
+  // returns true if contains only return operation
+  bool is_empty_method() const;
+
+  // returns true if this is a vanilla constructor
+  bool is_vanilla_constructor() const;
+
+  // checks method and its method holder
+  bool is_final_method() const;
+  bool is_strict_method() const;
+
+  // true if method needs no dynamic dispatch (final and/or no vtable entry)
+  bool can_be_statically_bound() const;
+
+  // returns true if the method has any backward branches.
+  bool has_loops() {
+    return access_flags().loops_flag_init() ? access_flags().has_loops() : compute_has_loops_flag();
+  };
+
+  bool compute_has_loops_flag();
+
+  bool has_jsrs() {
+    return access_flags().has_jsrs();
+  };
+  void set_has_jsrs() {
+    _access_flags.set_has_jsrs();
+  }
+
+  // returns true if the method has any monitors.
+  bool has_monitors() const                      { return is_synchronized() || access_flags().has_monitor_bytecodes(); }
+  bool has_monitor_bytecodes() const             { return access_flags().has_monitor_bytecodes(); }
+
+  void set_has_monitor_bytecodes()               { _access_flags.set_has_monitor_bytecodes(); }
+
+  // monitor matching. This returns a conservative estimate of whether the monitorenter/monitorexit bytecodes
+  // propererly nest in the method. It might return false, even though they actually nest properly, since the info.
+  // has not been computed yet.
+  bool guaranteed_monitor_matching() const       { return access_flags().is_monitor_matching(); }
+  void set_guaranteed_monitor_matching()         { _access_flags.set_monitor_matching(); }
+
+  // returns true if the method is an accessor function (setter/getter).
+  bool is_accessor() const;
+
+  // returns true if the method is an initializer (<init> or <clinit>).
+  bool is_initializer() const;
+
+  // compiled code support
+  // NOTE: code() is inherently racy as deopt can be clearing code
+  // simultaneously. Use with caution.
+  bool has_compiled_code() const                 { return code() != NULL; }
+
+  // sizing
+  static int object_size(bool is_native);
+  static int header_size()                       { return sizeof(methodOopDesc)/HeapWordSize; }
+  int object_size() const                        { return method_size(); }
+
+  bool object_is_parsable() const                { return method_size() > 0; }
+
+  // interpreter support
+  static ByteSize const_offset()                 { return byte_offset_of(methodOopDesc, _constMethod       ); }
+  static ByteSize constants_offset()             { return byte_offset_of(methodOopDesc, _constants         ); }
+  static ByteSize access_flags_offset()          { return byte_offset_of(methodOopDesc, _access_flags      ); }
+#ifdef CC_INTERP
+  static ByteSize result_index_offset()          { return byte_offset_of(methodOopDesc, _result_index ); }
+#endif /* CC_INTERP */
+  static ByteSize size_of_locals_offset()        { return byte_offset_of(methodOopDesc, _max_locals        ); }
+  static ByteSize size_of_parameters_offset()    { return byte_offset_of(methodOopDesc, _size_of_parameters); }
+  static ByteSize from_compiled_offset()         { return byte_offset_of(methodOopDesc, _from_compiled_entry); }
+  static ByteSize code_offset()                  { return byte_offset_of(methodOopDesc, _code); }
+  static ByteSize invocation_counter_offset()    { return byte_offset_of(methodOopDesc, _invocation_counter); }
+  static ByteSize backedge_counter_offset()      { return byte_offset_of(methodOopDesc, _backedge_counter); }
+  static ByteSize method_data_offset()           {
+    return byte_offset_of(methodOopDesc, _method_data);
+  }
+  static ByteSize interpreter_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _interpreter_invocation_count); }
+#ifndef PRODUCT
+  static ByteSize compiled_invocation_counter_offset() { return byte_offset_of(methodOopDesc, _compiled_invocation_count); }
+#endif // not PRODUCT
+  static ByteSize native_function_offset()       { return in_ByteSize(sizeof(methodOopDesc));                 }
+  static ByteSize from_interpreted_offset()      { return byte_offset_of(methodOopDesc, _from_interpreted_entry ); }
+  static ByteSize interpreter_entry_offset()     { return byte_offset_of(methodOopDesc, _i2i_entry ); }
+  static ByteSize signature_handler_offset()     { return in_ByteSize(sizeof(methodOopDesc) + wordSize);      }
+  static ByteSize max_stack_offset()             { return byte_offset_of(methodOopDesc, _max_stack         ); }
+
+  // for code generation
+  static int method_data_offset_in_bytes()       { return offset_of(methodOopDesc, _method_data); }
+  static int interpreter_invocation_counter_offset_in_bytes()
+                                                 { return offset_of(methodOopDesc, _interpreter_invocation_count); }
+
+  // Static methods that are used to implement member methods where an exposed this pointer
+  // is needed due to possible GCs
+  static objArrayHandle resolved_checked_exceptions_impl(methodOop this_oop, TRAPS);
+
+  // Returns the byte code index from the byte code pointer
+  int     bci_from(address bcp) const;
+  address bcp_from(int     bci) const;
+  int validate_bci_from_bcx(intptr_t bcx) const;
+
+  // Returns the line number for a bci if debugging information for the method is prowided,
+  // -1 is returned otherwise.
+  int line_number_from_bci(int bci) const;
+
+  // Reflection support
+  bool is_overridden_in(klassOop k) const;
+
+  // RedefineClasses() support:
+  bool is_old() const                               { return access_flags().is_old(); }
+  void set_is_old()                                 { _access_flags.set_is_old(); }
+  bool is_obsolete() const                          { return access_flags().is_obsolete(); }
+  void set_is_obsolete()                            { _access_flags.set_is_obsolete(); }
+
+  // JVMTI Native method prefixing support:
+  bool is_prefixed_native() const                   { return access_flags().is_prefixed_native(); }
+  void set_is_prefixed_native()                     { _access_flags.set_is_prefixed_native(); }
+
+  // Rewriting support
+  static methodHandle clone_with_new_data(methodHandle m, u_char* new_code, int new_code_length,
+                                          u_char* new_compressed_linenumber_table, int new_compressed_linenumber_size, TRAPS);
+
+  // Get this method's jmethodID -- allocate if it doesn't exist
+  jmethodID jmethod_id()                            { methodHandle this_h(this);
+                                                      return instanceKlass::jmethod_id_for_impl(method_holder(), this_h); }
+
+  // Lookup the jmethodID for this method.  Return NULL if not found.
+  // NOTE that this function can be called from a signal handler
+  // (see AsyncGetCallTrace support for Forte Analyzer) and this
+  // needs to be async-safe. No allocation should be done and
+  // so handles are not used to avoid deadlock.
+  jmethodID find_jmethod_id_or_null()               { return instanceKlass::cast(method_holder())->jmethod_id_or_null(this); }
+
+  // JNI static invoke cached itable index accessors
+  int cached_itable_index()                         { return instanceKlass::cast(method_holder())->cached_itable_index(method_idnum()); }
+  void set_cached_itable_index(int index)           { instanceKlass::cast(method_holder())->set_cached_itable_index(method_idnum(), index); }
+
+  // Support for inlining of intrinsic methods
+  vmIntrinsics::ID intrinsic_id() const { // returns zero if not an intrinsic
+    const u1& cache = _intrinsic_id_cache;
+    if (cache != 0) {
+      return (vmIntrinsics::ID)(cache - 1);
+    } else {
+      vmIntrinsics::ID id = compute_intrinsic_id();
+      *(u1*)&cache = ((u1) id) + 1;   // force the cache to be non-const
+      vmIntrinsics::verify_method(id, (methodOop) this);
+      assert((vmIntrinsics::ID)(cache - 1) == id, "proper conversion");
+      return id;
+    }
+  }
+
+  // On-stack replacement support
+  bool has_osr_nmethod()                         { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci) != NULL; }
+  nmethod* lookup_osr_nmethod_for(int bci)       { return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci); }
+
+  // Inline cache support
+  void cleanup_inline_caches();
+
+  // Find if klass for method is loaded
+  bool is_klass_loaded_by_klass_index(int klass_index) const;
+  bool is_klass_loaded(int refinfo_index, bool must_be_resolved = false) const;
+
+  // Indicates whether compilation failed earlier for this method, or
+  // whether it is not compilable for another reason like having a
+  // breakpoint set in it.
+  bool is_not_compilable(int comp_level = CompLevel_highest_tier) const;
+  void set_not_compilable(int comp_level = CompLevel_highest_tier);
+
+  bool is_not_osr_compilable() const             { return is_not_compilable() || access_flags().is_not_osr_compilable(); }
+  void set_not_osr_compilable()                  { _access_flags.set_not_osr_compilable(); }
+
+  bool is_not_tier1_compilable() const           { return access_flags().is_not_tier1_compilable(); }
+  void set_not_tier1_compilable()                { _access_flags.set_not_tier1_compilable(); }
+
+  // Background compilation support
+  bool queued_for_compilation() const            { return access_flags().queued_for_compilation();    }
+  void set_queued_for_compilation()              { _access_flags.set_queued_for_compilation(); }
+  void clear_queued_for_compilation()            { _access_flags.clear_queued_for_compilation(); }
+
+  static methodOop method_from_bcp(address bcp);
+
+  // Resolve all classes in signature, return 'true' if successful
+  static bool load_signature_classes(methodHandle m, TRAPS);
+
+  // Return if true if not all classes references in signature, including return type, has been loaded
+  static bool has_unloaded_classes_in_signature(methodHandle m, TRAPS);
+
+  // Printing
+  void print_short_name(outputStream* st)        /*PRODUCT_RETURN*/; // prints as klassname::methodname; Exposed so field engineers can debug VM
+  void print_name(outputStream* st)              PRODUCT_RETURN; // prints as "virtual void foo(int)"
+
+  // Helper routine used for method sorting
+  static void sort_methods(objArrayOop methods,
+                           objArrayOop methods_annotations,
+                           objArrayOop methods_parameter_annotations,
+                           objArrayOop methods_default_annotations,
+                           bool idempotent = false);
+
+  // size of parameters
+  void set_size_of_parameters(int size)          { _size_of_parameters = size; }
+ private:
+
+  // Helper routine for intrinsic_id().
+  vmIntrinsics::ID compute_intrinsic_id() const;
+
+  // Inlined elements
+  address* native_function_addr() const          { assert(is_native(), "must be native"); return (address*) (this+1); }
+  address* signature_handler_addr() const        { return native_function_addr() + 1; }
+
+  // Garbage collection support
+  oop*  adr_constMethod() const                  { return (oop*)&_constMethod;     }
+  oop*  adr_constants() const                    { return (oop*)&_constants;       }
+  oop*  adr_method_data() const                  { return (oop*)&_method_data;     }
+};
+
+
+// Utility class for compressing line number tables
+
+class CompressedLineNumberWriteStream: public CompressedWriteStream {
+ private:
+  int _bci;
+  int _line;
+ public:
+  // Constructor
+  CompressedLineNumberWriteStream(int initial_size) : CompressedWriteStream(initial_size), _bci(0), _line(0) {}
+  CompressedLineNumberWriteStream(u_char* buffer, int initial_size) : CompressedWriteStream(buffer, initial_size), _bci(0), _line(0) {}
+
+  // Write (bci, line number) pair to stream
+  void write_pair_regular(int bci_delta, int line_delta);
+
+  inline void write_pair_inline(int bci, int line) {
+    int bci_delta = bci - _bci;
+    int line_delta = line - _line;
+    _bci = bci;
+    _line = line;
+    // Skip (0,0) deltas - they do not add information and conflict with terminator.
+    if (bci_delta == 0 && line_delta == 0) return;
+    // Check if bci is 5-bit and line number 3-bit unsigned.
+    if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
+      // Compress into single byte.
+      jubyte value = ((jubyte) bci_delta << 3) | (jubyte) line_delta;
+      // Check that value doesn't match escape character.
+      if (value != 0xFF) {
+        write_byte(value);
+        return;
+      }
+    }
+    write_pair_regular(bci_delta, line_delta);
+  }
+
+// Windows AMD64 + Apr 2005 PSDK with /O2 generates bad code for write_pair.
+// Disabling optimization doesn't work for methods in header files
+// so we force it to call through the non-optimized version in the .cpp.
+// It's gross, but it's the only way we can ensure that all callers are
+// fixed.  MSC_VER is defined in build/windows/makefiles/compile.make.
+#if defined(_M_AMD64) && MSC_VER >= 1400
+  void write_pair(int bci, int line);
+#else
+  void write_pair(int bci, int line) { write_pair_inline(bci, line); }
+#endif
+
+  // Write end-of-stream marker
+  void write_terminator()                        { write_byte(0); }
+};
+
+
+// Utility class for decompressing line number tables
+
+class CompressedLineNumberReadStream: public CompressedReadStream {
+ private:
+  int _bci;
+  int _line;
+ public:
+  // Constructor
+  CompressedLineNumberReadStream(u_char* buffer);
+  // Read (bci, line number) pair from stream. Returns false at end-of-stream.
+  bool read_pair();
+  // Accessing bci and line number (after calling read_pair)
+  int bci() const                               { return _bci; }
+  int line() const                              { return _line; }
+};
+
+
+/// Fast Breakpoints.
+
+// If this structure gets more complicated (because bpts get numerous),
+// move it into its own header.
+
+// There is presently no provision for concurrent access
+// to breakpoint lists, which is only OK for JVMTI because
+// breakpoints are written only at safepoints, and are read
+// concurrently only outside of safepoints.
+
+class BreakpointInfo : public CHeapObj {
+  friend class VMStructs;
+ private:
+  Bytecodes::Code  _orig_bytecode;
+  int              _bci;
+  u2               _name_index;       // of method
+  u2               _signature_index;  // of method
+  BreakpointInfo*  _next;             // simple storage allocation
+
+ public:
+  BreakpointInfo(methodOop m, int bci);
+
+  // accessors
+  Bytecodes::Code orig_bytecode()                     { return _orig_bytecode; }
+  void        set_orig_bytecode(Bytecodes::Code code) { _orig_bytecode = code; }
+  int         bci()                                   { return _bci; }
+
+  BreakpointInfo*          next() const               { return _next; }
+  void                 set_next(BreakpointInfo* n)    { _next = n; }
+
+  // helps for searchers
+  bool match(methodOop m, int bci) {
+    return bci == _bci && match(m);
+  }
+
+  bool match(methodOop m) {
+    return _name_index == m->name_index() &&
+      _signature_index == m->signature_index();
+  }
+
+  void set(methodOop method);
+  void clear(methodOop method);
+};