Mercurial > hg > graal-compiler
view src/share/vm/code/debugInfo.hpp @ 2149:7e37af9d69ef
7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr
author | tonyp |
---|---|
date | Wed, 19 Jan 2011 09:35:17 -0500 |
parents | f95d63e2154a |
children | da91efe96a93 |
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/* * Copyright (c) 1997, 2010, 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 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; } // 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 klass 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() { return code()->oop_at(read_int()); } 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); } }; #endif // SHARE_VM_CODE_DEBUGINFO_HPP