jdk8-mips64-public/hotspot: src/share/vm/oops/methodOop.hpp@e1162778c1c8 (annotated)

src/share/vm/oops/methodOop.hpp@e1162778c1c8 (annotated)

src/share/vm/oops/methodOop.hpp

Thu, 07 Apr 2011 09:53:20 -0700

author: johnc
date: Thu, 07 Apr 2011 09:53:20 -0700
changeset 2781: e1162778c1c8
parent 2637: 799d8ccf63cf
child 2698: 38fea01eb669
permissions: -rw-r--r--

7009266: G1: assert(obj->is_oop_or_null(true )) failed: Error
Summary: A referent object that is only weakly reachable at the start of concurrent marking but is re-attached to the strongly reachable object graph during marking may not be marked as live. This can cause the reference object to be processed prematurely and leave dangling pointers to the referent object. Implement a read barrier for the java.lang.ref.Reference::referent field by intrinsifying the Reference.get() method, and intercepting accesses though JNI, reflection, and Unsafe, so that when a non-null referent object is read it is also logged in an SATB buffer.
Reviewed-by: kvn, iveresov, never, tonyp, dholmes

 /*
  * Copyright (c) 1997, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_OOPS_METHODOOP_HPP
 #define SHARE_VM_OOPS_METHODOOP_HPP
 #include "classfile/vmSymbols.hpp"
 #include "code/compressedStream.hpp"
 #include "compiler/oopMap.hpp"
 #include "interpreter/invocationCounter.hpp"
 #include "oops/constMethodOop.hpp"
 #include "oops/constantPoolOop.hpp"
 #include "oops/instanceKlass.hpp"
 #include "oops/oop.hpp"
 #include "oops/typeArrayOop.hpp"
 #include "utilities/accessFlags.hpp"
 #include "utilities/growableArray.hpp"
 // 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, (unused)  |  throwout_count            |
 // |------------------------------------------------------|
 // | num_breakpoints         |  (unused)                  |
 // |------------------------------------------------------|
 // | invocation_counter                                   |
 // | backedge_counter                                     |
 // |------------------------------------------------------|
 // |           prev_time (tiered only, 64 bit wide)       |
 // |                                                      |
 // |------------------------------------------------------|
 // |                  rate (tiered)                       |
 // |------------------------------------------------------|
 // | 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 (reused as prev_event_count in tiered)
   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;               // vmSymbols::intrinsic_id (0 == _none)
   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
 #ifdef TIERED
   jlong             _prev_time;                   // Previous time the rate was acquired
   float             _rate;                        // Events (invocation and backedge counter increments) per millisecond
 #endif
 #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
   Symbol* 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
   Symbol* 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
   Symbol* generic_signature() const              { int idx = generic_signature_index(); return ((idx != 0) ? _constants->symbol_at(idx) : (Symbol*)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, Symbol* method_name, Symbol* signature);
   static char* name_and_sig_as_C_string(Klass* klass, Symbol* method_name, Symbol* signature, char* buf, int size);
   Bytecodes::Code java_code_at(int bci) const {
     return Bytecodes::java_code_at(this, bcp_from(bci));
   }
   Bytecodes::Code code_at(int bci) const {
     return Bytecodes::code_at(this, bcp_from(bci));
   }
   // JVMTI breakpoints
   Bytecodes::Code orig_bytecode_at(int bci) const;
   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_comp_level() const;
   void set_highest_comp_level(int level);
   int highest_osr_comp_level() const;
   void set_highest_osr_comp_level(int level);
   // 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();
   }
   void set_stackmap_data(typeArrayOop sd) {
     constMethod()->set_stackmap_data(sd);
   }
   // 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; }
 #ifdef TIERED
   // We are reusing interpreter_invocation_count as a holder for the previous event count!
   // We can do that since interpreter_invocation_count is not used in tiered.
   int prev_event_count() const                   { return _interpreter_invocation_count;  }
   void set_prev_event_count(int count)           { _interpreter_invocation_count = count; }
   jlong prev_time() const                        { return _prev_time; }
   void set_prev_time(jlong time)                 { _prev_time = time; }
   float rate() const                             { return _rate; }
   void set_rate(float rate)                      { _rate = rate; }
 #endif
   int invocation_count();
   int backedge_count();
   bool was_executed_more_than(int n);
   bool was_never_executed()                      { return !was_executed_more_than(0); }
   static void build_interpreter_method_data(methodHandle method, TRAPS);
   int interpreter_invocation_count() {
     if (TieredCompilation) return invocation_count();
     else return _interpreter_invocation_count;
   }
   void set_interpreter_invocation_count(int count) { _interpreter_invocation_count = count; }
   int increment_interpreter_invocation_count() {
     if (TieredCompilation) ShouldNotReachHere();
     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 relevant
   // 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
   static 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.
     highest_unused_vtable_index_value = -5,
     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();
 #endif
   // byte codes
   void    set_code(address code)      { return constMethod()->set_code(code); }
   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)
   Symbol* 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;
   // returns true if the method is static OR if the classfile version < 51
   bool has_valid_initializer_flags() const;
   // returns true if the method name is <clinit> and the method has
   // valid static initializer flags.
   bool is_static_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 int intrinsic_id_offset_in_bytes()      { return offset_of(methodOopDesc, _intrinsic_id); }
   static int intrinsic_id_size_in_bytes()        { return sizeof(u1); }
   // 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;
   // JSR 292 support
   bool is_method_handle_invoke() const              { return access_flags().is_method_handle_invoke(); }
   static bool is_method_handle_invoke_name(vmSymbols::SID name_sid);
   static bool is_method_handle_invoke_name(Symbol* name) {
     return is_method_handle_invoke_name(vmSymbols::find_sid(name));
   }
   // Tests if this method is an internal adapter frame from the
   // MethodHandleCompiler.
   bool is_method_handle_adapter() const;
   static methodHandle make_invoke_method(KlassHandle holder,
                                          Symbol* name, //invokeExact or invokeGeneric
                                          Symbol* signature, //anything at all
                                          Handle method_type,
                                          TRAPS);
   // these operate only on invoke methods:
   oop method_handle_type() const;
   static jint* method_type_offsets_chain();  // series of pointer-offsets, terminated by -1
   // presize interpreter frames for extra interpreter stack entries, if needed
   // method handles want to be able to push a few extra values (e.g., a bound receiver), and
   // invokedynamic sometimes needs to push a bootstrap method, call site, and arglist,
   // all without checking for a stack overflow
   static int extra_stack_entries() { return (EnableMethodHandles ? (int)MethodHandlePushLimit : 0) + (EnableInvokeDynamic ? 3 : 0); }
   static int extra_stack_words();  // = extra_stack_entries() * Interpreter::stackElementSize()
   // 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(); }
   // see the definition in methodOop.cpp for the gory details
   bool should_not_be_cached() const;
   // 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::get_jmethod_id(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          { return (vmIntrinsics::ID) _intrinsic_id;           }
   void     set_intrinsic_id(vmIntrinsics::ID id) {                           _intrinsic_id = (u1) id; }
   // Helper routines for intrinsic_id() and vmIntrinsics::method().
   void init_intrinsic_id();     // updates from _none if a match
   static vmSymbols::SID klass_id_for_intrinsics(klassOop holder);
   // On-stack replacement support
   bool has_osr_nmethod(int level, bool match_level) {
    return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, InvocationEntryBci, level, match_level) != NULL;
   }
   nmethod* lookup_osr_nmethod_for(int bci, int level, bool match_level) {
     return instanceKlass::cast(method_holder())->lookup_osr_nmethod(this, bci, level, match_level);
   }
   // 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_any) const;
   void set_not_compilable(int comp_level = CompLevel_all, bool report = true);
   void set_not_compilable_quietly(int comp_level = CompLevel_all) {
     set_not_compilable(comp_level, false);
   }
   bool is_not_osr_compilable(int comp_level = CompLevel_any) const {
     return is_not_compilable(comp_level) || access_flags().is_not_osr_compilable();
   }
   void set_not_osr_compilable()               { _access_flags.set_not_osr_compilable();       }
   bool is_not_c1_compilable() const           { return access_flags().is_not_c1_compilable(); }
   void set_not_c1_compilable()                { _access_flags.set_not_c1_compilable();        }
   bool is_not_c2_compilable() const           { return access_flags().is_not_c2_compilable(); }
   void set_not_c2_compilable()                { _access_flags.set_not_c2_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();   }
   // 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:
   // 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 by the windows compiler
 #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(const methodOopDesc* m, int bci) {
     return bci == _bci && match(m);
   }
   bool match(const methodOopDesc* m) {
     return _name_index == m->name_index() &&
       _signature_index == m->signature_index();
   }
   void set(methodOop method);
   void clear(methodOop method);
 };
 #endif // SHARE_VM_OOPS_METHODOOP_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/oops/methodOop.hpp@e1162778c1c8 (annotated)

src/share/vm/oops/methodOop.hpp