jdk8-mips64-public/hotspot: src/share/vm/ci/ciMethod.hpp@5eb9169b1a14 (annotated)

src/share/vm/ci/ciMethod.hpp@5eb9169b1a14 (annotated)

src/share/vm/ci/ciMethod.hpp

Wed, 12 Oct 2011 21:00:13 -0700

author: twisti
date: Wed, 12 Oct 2011 21:00:13 -0700
changeset 3197: 5eb9169b1a14
parent 3097: de847cac9235
child 3313: a04a201f0f5a
permissions: -rw-r--r--

7092712: JSR 292: unloaded invokedynamic call sites can lead to a crash with signature types not on BCP
Reviewed-by: jrose, never

 /*
  * Copyright (c) 1999, 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_CI_CIMETHOD_HPP
 #define SHARE_VM_CI_CIMETHOD_HPP
 #include "ci/ciFlags.hpp"
 #include "ci/ciInstanceKlass.hpp"
 #include "ci/ciObject.hpp"
 #include "ci/ciSignature.hpp"
 #include "compiler/methodLiveness.hpp"
 #include "prims/methodHandles.hpp"
 #include "utilities/bitMap.hpp"
 class ciMethodBlocks;
 class MethodLiveness;
 class BitMap;
 class Arena;
 class BCEscapeAnalyzer;
 // ciMethod
 //
 // This class represents a methodOop in the HotSpot virtual
 // machine.
 class ciMethod : public ciObject {
   friend class CompileBroker;
   CI_PACKAGE_ACCESS
   friend class ciEnv;
   friend class ciExceptionHandlerStream;
   friend class ciBytecodeStream;
   friend class ciMethodHandle;
  private:
   // General method information.
   ciFlags          _flags;
   ciSymbol*        _name;
   ciInstanceKlass* _holder;
   ciSignature*     _signature;
   ciMethodData*    _method_data;
   ciMethodBlocks*   _method_blocks;
   // Code attributes.
   int _code_size;
   int _max_stack;
   int _max_locals;
   vmIntrinsics::ID _intrinsic_id;
   int _handler_count;
   int _interpreter_invocation_count;
   int _interpreter_throwout_count;
   bool _uses_monitors;
   bool _balanced_monitors;
   bool _is_c1_compilable;
   bool _is_c2_compilable;
   bool _can_be_statically_bound;
   // Lazy fields, filled in on demand
   address              _code;
   ciExceptionHandler** _exception_handlers;
   // Optional liveness analyzer.
   MethodLiveness* _liveness;
 #if defined(COMPILER2) || defined(SHARK)
   ciTypeFlow*         _flow;
   BCEscapeAnalyzer*   _bcea;
 #endif
   ciMethod(methodHandle h_m);
   ciMethod(ciInstanceKlass* holder, ciSymbol* name, ciSymbol* signature, ciInstanceKlass* accessor);
   methodOop get_methodOop() const {
     methodOop m = (methodOop)get_oop();
     assert(m != NULL, "illegal use of unloaded method");
     return m;
   }
   oop loader() const                             { return _holder->loader(); }
   const char* type_string()                      { return "ciMethod"; }
   void print_impl(outputStream* st);
   void load_code();
   void check_is_loaded() const                   { assert(is_loaded(), "not loaded"); }
   bool ensure_method_data(methodHandle h_m);
   void code_at_put(int bci, Bytecodes::Code code) {
     Bytecodes::check(code);
     assert(0 <= bci && bci < code_size(), "valid bci");
     address bcp = _code + bci;
     *bcp = code;
   }
  public:
   // Basic method information.
   ciFlags flags() const                          { check_is_loaded(); return _flags; }
   ciSymbol* name() const                         { return _name; }
   ciInstanceKlass* holder() const                { return _holder; }
   ciMethodData* method_data();
   ciMethodData* method_data_or_null();
   // Signature information.
   ciSignature* signature() const                 { return _signature; }
   ciType*      return_type() const               { return _signature->return_type(); }
   int          arg_size_no_receiver() const      { return _signature->size(); }
   // Can only be used on loaded ciMethods
   int          arg_size() const                  {
     check_is_loaded();
     return _signature->size() + (_flags.is_static() ? 0 : 1);
   }
   // Report the number of elements on stack when invoking this method.
   // This is different than the regular arg_size because invokdynamic
   // has an implicit receiver.
   int invoke_arg_size(Bytecodes::Code code) const {
     int arg_size = _signature->size();
     // Add a receiver argument, maybe:
     if (code != Bytecodes::_invokestatic &&
         code != Bytecodes::_invokedynamic) {
       arg_size++;
     }
     return arg_size;
   }
   // Method code and related information.
   address code()                                 { if (_code == NULL) load_code(); return _code; }
   int code_size() const                          { check_is_loaded(); return _code_size; }
   int max_stack() const                          { check_is_loaded(); return _max_stack; }
   int max_locals() const                         { check_is_loaded(); return _max_locals; }
   vmIntrinsics::ID intrinsic_id() const          { check_is_loaded(); return _intrinsic_id; }
   bool has_exception_handlers() const            { check_is_loaded(); return _handler_count > 0; }
   int exception_table_length() const             { check_is_loaded(); return _handler_count; }
   int interpreter_invocation_count() const       { check_is_loaded(); return _interpreter_invocation_count; }
   int interpreter_throwout_count() const         { check_is_loaded(); return _interpreter_throwout_count; }
   // Code size for inlining decisions.
   int code_size_for_inlining();
   int comp_level();
   int highest_osr_comp_level();
   Bytecodes::Code java_code_at_bci(int bci) {
     address bcp = code() + bci;
     return Bytecodes::java_code_at(NULL, bcp);
   }
   BCEscapeAnalyzer  *get_bcea();
   ciMethodBlocks    *get_method_blocks();
   bool    has_linenumber_table() const;          // length unknown until decompression
   u_char* compressed_linenumber_table() const;   // not preserved by gc
   int line_number_from_bci(int bci) const;
   // Runtime information.
   int           vtable_index();
 #ifdef SHARK
   int           itable_index();
 #endif // SHARK
   address       native_entry();
   address       interpreter_entry();
   // Analysis and profiling.
   //
   // Usage note: liveness_at_bci and init_vars should be wrapped in ResourceMarks.
   bool          uses_monitors() const            { return _uses_monitors; } // this one should go away, it has a misleading name
   bool          has_monitor_bytecodes() const    { return _uses_monitors; }
   bool          has_balanced_monitors();
   // Returns a bitmap indicating which locals are required to be
   // maintained as live for deopt.  raw_liveness_at_bci is always the
   // direct output of the liveness computation while liveness_at_bci
   // may mark all locals as live to improve support for debugging Java
   // code by maintaining the state of as many locals as possible.
   MethodLivenessResult raw_liveness_at_bci(int bci);
   MethodLivenessResult liveness_at_bci(int bci);
   // Get the interpreters viewpoint on oop liveness.  MethodLiveness is
   // conservative in the sense that it may consider locals to be live which
   // cannot be live, like in the case where a local could contain an oop or
   // a primitive along different paths.  In that case the local must be
   // dead when those paths merge. Since the interpreter's viewpoint is
   // used when gc'ing an interpreter frame we need to use its viewpoint
   // during OSR when loading the locals.
   BitMap  live_local_oops_at_bci(int bci);
 #ifdef COMPILER1
   const BitMap  bci_block_start();
 #endif
   ciTypeFlow*   get_flow_analysis();
   ciTypeFlow*   get_osr_flow_analysis(int osr_bci);  // alternate entry point
   ciCallProfile call_profile_at_bci(int bci);
   int           interpreter_call_site_count(int bci);
   // Given a certain calling environment, find the monomorphic target
   // for the call.  Return NULL if the call is not monomorphic in
   // its calling environment.
   ciMethod* find_monomorphic_target(ciInstanceKlass* caller,
                                     ciInstanceKlass* callee_holder,
                                     ciInstanceKlass* actual_receiver);
   // Given a known receiver klass, find the target for the call.
   // Return NULL if the call has no target or is abstract.
   ciMethod* resolve_invoke(ciKlass* caller, ciKlass* exact_receiver);
   // Find the proper vtable index to invoke this method.
   int resolve_vtable_index(ciKlass* caller, ciKlass* receiver);
   // Compilation directives
   bool will_link(ciKlass* accessing_klass,
                  ciKlass* declared_method_holder,
                  Bytecodes::Code bc);
   bool should_exclude();
   bool should_inline();
   bool should_not_inline();
   bool should_print_assembly();
   bool break_at_execute();
   bool has_option(const char *option);
   bool can_be_compiled();
   bool can_be_osr_compiled(int entry_bci);
   void set_not_compilable();
   bool has_compiled_code();
   int  instructions_size(int comp_level = CompLevel_any);
   void log_nmethod_identity(xmlStream* log);
   bool is_not_reached(int bci);
   bool was_executed_more_than(int times);
   bool has_unloaded_classes_in_signature();
   bool is_klass_loaded(int refinfo_index, bool must_be_resolved) const;
   bool check_call(int refinfo_index, bool is_static) const;
   bool ensure_method_data();  // make sure it exists in the VM also
   int scale_count(int count, float prof_factor = 1.);  // make MDO count commensurate with IIC
   // JSR 292 support
   bool is_method_handle_invoke()  const;
   bool is_method_handle_adapter() const;
   ciInstance* method_handle_type();
   // What kind of ciObject is this?
   bool is_method()                               { return true; }
   // Java access flags
   bool is_public      () const                   { return flags().is_public(); }
   bool is_private     () const                   { return flags().is_private(); }
   bool is_protected   () const                   { return flags().is_protected(); }
   bool is_static      () const                   { return flags().is_static(); }
   bool is_final       () const                   { return flags().is_final(); }
   bool is_synchronized() const                   { return flags().is_synchronized(); }
   bool is_native      () const                   { return flags().is_native(); }
   bool is_interface   () const                   { return flags().is_interface(); }
   bool is_abstract    () const                   { return flags().is_abstract(); }
   bool is_strict      () const                   { return flags().is_strict(); }
   // Other flags
   bool is_empty_method() const;
   bool is_vanilla_constructor() const;
   bool is_final_method() const                   { return is_final() || holder()->is_final(); }
   bool has_loops      () const;
   bool has_jsrs       () const;
   bool is_accessor    () const;
   bool is_initializer () const;
   bool can_be_statically_bound() const           { return _can_be_statically_bound; }
   // Print the bytecodes of this method.
   void print_codes_on(outputStream* st);
   void print_codes() {
     print_codes_on(tty);
   }
   void print_codes_on(int from, int to, outputStream* st);
   // Print the name of this method in various incarnations.
   void print_name(outputStream* st = tty);
   void print_short_name(outputStream* st = tty);
   methodOop get_method_handle_target() {
     KlassHandle receiver_limit; int flags = 0;
     methodHandle m = MethodHandles::decode_method(get_oop(), receiver_limit, flags);
     return m();
   }
 };
 #endif // SHARE_VM_CI_CIMETHOD_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/ci/ciMethod.hpp@5eb9169b1a14 (annotated)

src/share/vm/ci/ciMethod.hpp