Mercurial > hg > graal-compiler
view src/share/vm/runtime/fieldDescriptor.hpp @ 1837:c99c53f07c14
6692906: CMS: parallel concurrent marking may be prone to hanging or stalling mutators for periods of time
Summary: Inserted missing yield(check)s in closures used during the work-stealing phase of parallel concurrent marking, a missing synchronous yield-request in the cms perm gen allocation path, and a terminator-terminator for the offer_termination invocation that monitors the yield status of the concurrent marking task. Elaborated some documentation comments and made some task queue termination loop flags configurable at start-up to aid debugging in the field.
Reviewed-by: jmasa, johnc, poonam
author | ysr |
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date | Wed, 29 Sep 2010 16:17:02 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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/* * Copyright (c) 1997, 2005, 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. * */ // A fieldDescriptor describes the attributes of a single field (instance or class variable). // It needs the class constant pool to work (because it only holds indices into the pool // rather than the actual info). class fieldDescriptor VALUE_OBJ_CLASS_SPEC { private: AccessFlags _access_flags; int _name_index; int _signature_index; int _initial_value_index; int _offset; int _generic_signature_index; int _index; // index into fields() array constantPoolHandle _cp; public: symbolOop name() const { return _cp->symbol_at(_name_index); } symbolOop signature() const { return _cp->symbol_at(_signature_index); } klassOop field_holder() const { return _cp->pool_holder(); } constantPoolOop constants() const { return _cp(); } AccessFlags access_flags() const { return _access_flags; } oop loader() const; // Offset (in words) of field from start of instanceOop / klassOop int offset() const { return _offset; } symbolOop generic_signature() const { return (_generic_signature_index > 0 ? _cp->symbol_at(_generic_signature_index) : (symbolOop)NULL); } int index() const { return _index; } typeArrayOop annotations() const; // Initial field value bool has_initial_value() const { return _initial_value_index != 0; } constantTag initial_value_tag() const; // The tag will return true on one of is_int(), is_long(), is_single(), is_double() jint int_initial_value() const; jlong long_initial_value() const; jfloat float_initial_value() const; jdouble double_initial_value() const; oop string_initial_value(TRAPS) const; // Field signature type BasicType field_type() const { return FieldType::basic_type(signature()); } // 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_volatile() const { return _access_flags.is_volatile(); } bool is_transient() const { return _access_flags.is_transient(); } bool is_synthetic() const { return _access_flags.is_synthetic(); } bool is_field_access_watched() const { return _access_flags.is_field_access_watched(); } bool is_field_modification_watched() const { return _access_flags.is_field_modification_watched(); } void set_is_field_access_watched(const bool value) { _access_flags.set_is_field_access_watched(value); } void set_is_field_modification_watched(const bool value) { _access_flags.set_is_field_modification_watched(value); } // Initialization void initialize(klassOop k, int index); // Print void print_on(outputStream* st) const PRODUCT_RETURN; void print_on_for(outputStream* st, oop obj) PRODUCT_RETURN; };