jdk8-mips64-public/hotspot: src/share/vm/code/debugInfo.hpp@a248d0be1309 (annotated)

src/share/vm/code/debugInfo.hpp@a248d0be1309 (annotated)

src/share/vm/code/debugInfo.hpp

Mon, 19 Aug 2019 10:11:31 +0200

author: neugens
date: Mon, 19 Aug 2019 10:11:31 +0200
changeset 9861: a248d0be1309
parent 6628: bd58c9e40d0a
child 6876: 710a3c8b516e
permissions: -rw-r--r--

8229401: Fix JFR code cache test failures
8223689: Add JFR Thread Sampling Support
8223690: Add JFR BiasedLock Event Support
8223691: Add JFR G1 Region Type Change Event Support
8223692: Add JFR G1 Heap Summary Event Support
Summary: Backport JFR from JDK11, additional fixes
Reviewed-by: neugens, apetushkov
Contributed-by: denghui.ddh@alibaba-inc.com

 /*
  * Copyright (c) 1997, 2014, 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_CODE_DEBUGINFO_HPP
 #define SHARE_VM_CODE_DEBUGINFO_HPP
 #include "code/compressedStream.hpp"
 #include "code/location.hpp"
 #include "code/nmethod.hpp"
 #include "code/oopRecorder.hpp"
 #include "runtime/stackValue.hpp"
 #include "utilities/growableArray.hpp"
 // Classes used for serializing debugging information.
 // These abstractions are introducted to provide symmetric
 // read and write operations.
 // ScopeValue        describes the value of a variable/expression in a scope
 // - LocationValue   describes a value in a given location (in frame or register)
 // - ConstantValue   describes a constant
 class ConstantOopReadValue;
 class ScopeValue: public ResourceObj {
  public:
   // Testers
   virtual bool is_location() const { return false; }
   virtual bool is_object() const { return false; }
   virtual bool is_constant_int() const { return false; }
   virtual bool is_constant_double() const { return false; }
   virtual bool is_constant_long() const { return false; }
   virtual bool is_constant_oop() const { return false; }
   virtual bool equals(ScopeValue* other) const { return false; }
   ConstantOopReadValue* as_ConstantOopReadValue() {
     assert(is_constant_oop(), "must be");
     return (ConstantOopReadValue*) this;
   }
   // Serialization of debugging information
   virtual void write_on(DebugInfoWriteStream* stream) = 0;
   static ScopeValue* read_from(DebugInfoReadStream* stream);
 };
 // A Location value describes a value in a given location; i.e. the corresponding
 // logical entity (e.g., a method temporary) lives in this location.
 class LocationValue: public ScopeValue {
  private:
   Location  _location;
  public:
   LocationValue(Location location)           { _location = location; }
   bool      is_location() const              { return true; }
   Location  location() const                 { return _location; }
   // Serialization of debugging information
   LocationValue(DebugInfoReadStream* stream);
   void write_on(DebugInfoWriteStream* stream);
   // Printing
   void print_on(outputStream* st) const;
 };
 // An ObjectValue describes an object eliminated by escape analysis.
 class ObjectValue: public ScopeValue {
  private:
   int                        _id;
   ScopeValue*                _klass;
   GrowableArray<ScopeValue*> _field_values;
   Handle                     _value;
   bool                       _visited;
  public:
   ObjectValue(int id, ScopeValue* klass)
      : _id(id)
      , _klass(klass)
      , _field_values()
      , _value()
      , _visited(false) {
     assert(klass->is_constant_oop(), "should be constant java mirror oop");
   }
   ObjectValue(int id)
      : _id(id)
      , _klass(NULL)
      , _field_values()
      , _value()
      , _visited(false) {}
   // Accessors
   bool                        is_object() const         { return true; }
   int                         id() const                { return _id; }
   ScopeValue*                 klass() const             { return _klass; }
   GrowableArray<ScopeValue*>* field_values()            { return &_field_values; }
   ScopeValue*                 field_at(int i) const     { return _field_values.at(i); }
   int                         field_size()              { return _field_values.length(); }
   Handle                      value() const             { return _value; }
   bool                        is_visited() const        { return _visited; }
   void                        set_value(oop value)      { _value = Handle(value); }
   void                        set_visited(bool visited) { _visited = false; }
   // Serialization of debugging information
   void read_object(DebugInfoReadStream* stream);
   void write_on(DebugInfoWriteStream* stream);
   // Printing
   void print_on(outputStream* st) const;
   void print_fields_on(outputStream* st) const;
 };
 // A ConstantIntValue describes a constant int; i.e., the corresponding logical entity
 // is either a source constant or its computation has been constant-folded.
 class ConstantIntValue: public ScopeValue {
  private:
   jint _value;
  public:
   ConstantIntValue(jint value)         { _value = value; }
   jint value() const                   { return _value;  }
   bool is_constant_int() const         { return true;    }
   bool equals(ScopeValue* other) const { return false;   }
   // Serialization of debugging information
   ConstantIntValue(DebugInfoReadStream* stream);
   void write_on(DebugInfoWriteStream* stream);
   // Printing
   void print_on(outputStream* st) const;
 };
 class ConstantLongValue: public ScopeValue {
  private:
   jlong _value;
  public:
   ConstantLongValue(jlong value)       { _value = value; }
   jlong value() const                  { return _value;  }
   bool is_constant_long() const        { return true;    }
   bool equals(ScopeValue* other) const { return false;   }
   // Serialization of debugging information
   ConstantLongValue(DebugInfoReadStream* stream);
   void write_on(DebugInfoWriteStream* stream);
   // Printing
   void print_on(outputStream* st) const;
 };
 class ConstantDoubleValue: public ScopeValue {
  private:
   jdouble _value;
  public:
   ConstantDoubleValue(jdouble value)   { _value = value; }
   jdouble value() const                { return _value;  }
   bool is_constant_double() const      { return true;    }
   bool equals(ScopeValue* other) const { return false;   }
   // Serialization of debugging information
   ConstantDoubleValue(DebugInfoReadStream* stream);
   void write_on(DebugInfoWriteStream* stream);
   // Printing
   void print_on(outputStream* st) const;
 };
 // A ConstantOopWriteValue is created by the compiler to
 // be written as debugging information.
 class ConstantOopWriteValue: public ScopeValue {
  private:
   jobject _value;
  public:
   ConstantOopWriteValue(jobject value) { _value = value; }
   jobject value() const                { return _value;  }
   bool is_constant_oop() const         { return true;    }
   bool equals(ScopeValue* other) const { return false;   }
   // Serialization of debugging information
   void write_on(DebugInfoWriteStream* stream);
   // Printing
   void print_on(outputStream* st) const;
 };
 // A ConstantOopReadValue is created by the VM when reading
 // debug information
 class ConstantOopReadValue: public ScopeValue {
  private:
   Handle _value;
  public:
   Handle value() const                 { return _value;  }
   bool is_constant_oop() const         { return true;    }
   bool equals(ScopeValue* other) const { return false;   }
   // Serialization of debugging information
   ConstantOopReadValue(DebugInfoReadStream* stream);
   void write_on(DebugInfoWriteStream* stream);
   // Printing
   void print_on(outputStream* st) const;
 };
 // MonitorValue describes the pair used for monitor_enter and monitor_exit.
 class MonitorValue: public ResourceObj {
  private:
   ScopeValue* _owner;
   Location    _basic_lock;
   bool        _eliminated;
  public:
   // Constructor
   MonitorValue(ScopeValue* owner, Location basic_lock, bool eliminated = false);
   // Accessors
   ScopeValue*  owner()      const { return _owner; }
   Location     basic_lock() const { return _basic_lock;  }
   bool         eliminated() const { return _eliminated; }
   // Serialization of debugging information
   MonitorValue(DebugInfoReadStream* stream);
   void write_on(DebugInfoWriteStream* stream);
   // Printing
   void print_on(outputStream* st) const;
 };
 // DebugInfoReadStream specializes CompressedReadStream for reading
 // debugging information. Used by ScopeDesc.
 class DebugInfoReadStream : public CompressedReadStream {
  private:
   const nmethod* _code;
   const nmethod* code() const { return _code; }
   GrowableArray<ScopeValue*>* _obj_pool;
  public:
   DebugInfoReadStream(const nmethod* code, int offset, GrowableArray<ScopeValue*>* obj_pool = NULL) :
     CompressedReadStream(code->scopes_data_begin(), offset) {
     _code = code;
     _obj_pool = obj_pool;
   } ;
   oop read_oop() {
     oop o = code()->oop_at(read_int());
     assert(o == NULL || o->is_oop(), "oop only");
     return o;
   }
   Method* read_method() {
     Method* o = (Method*)(code()->metadata_at(read_int()));
     // is_metadata() is a faster check than is_metaspace_object()
     assert(o == NULL || o->is_metadata(), "meta data only");
     return o;
   }
   ScopeValue* read_object_value();
   ScopeValue* get_cached_object();
   // BCI encoding is mostly unsigned, but -1 is a distinguished value
   int read_bci() { return read_int() + InvocationEntryBci; }
 };
 // DebugInfoWriteStream specializes CompressedWriteStream for
 // writing debugging information. Used by ScopeDescRecorder.
 class DebugInfoWriteStream : public CompressedWriteStream {
  private:
   DebugInformationRecorder* _recorder;
   DebugInformationRecorder* recorder() const { return _recorder; }
  public:
   DebugInfoWriteStream(DebugInformationRecorder* recorder, int initial_size);
   void write_handle(jobject h);
   void write_bci(int bci) { write_int(bci - InvocationEntryBci); }
   void write_metadata(Metadata* m);
 };
 #endif // SHARE_VM_CODE_DEBUGINFO_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/code/debugInfo.hpp@a248d0be1309 (annotated)

src/share/vm/code/debugInfo.hpp