Mercurial > hg > truffle
view src/cpu/zero/vm/nativeInst_zero.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 |
---|---|
date | Wed, 29 Sep 2010 16:17:02 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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/* * Copyright (c) 2003, 2006, Oracle and/or its affiliates. All rights reserved. * Copyright 2007 Red Hat, Inc. * 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. * */ // We have interfaces for the following instructions: // - NativeInstruction // - - NativeCall // - - NativeMovConstReg // - - NativeMovConstRegPatching // - - NativeJump // - - NativeIllegalOpCode // - - NativeReturn // - - NativeReturnX (return with argument) // - - NativePushConst // - - NativeTstRegMem // The base class for different kinds of native instruction abstractions. // Provides the primitive operations to manipulate code relative to this. class NativeInstruction VALUE_OBJ_CLASS_SPEC { public: bool is_jump() { ShouldNotCallThis(); } bool is_safepoint_poll() { ShouldNotCallThis(); } }; inline NativeInstruction* nativeInstruction_at(address address) { ShouldNotCallThis(); } class NativeCall : public NativeInstruction { public: enum zero_specific_constants { instruction_size = 0 // not used within the interpreter }; address instruction_address() const { ShouldNotCallThis(); } address next_instruction_address() const { ShouldNotCallThis(); } address return_address() const { ShouldNotCallThis(); } address destination() const { ShouldNotCallThis(); } void set_destination_mt_safe(address dest) { ShouldNotCallThis(); } void verify_alignment() { ShouldNotCallThis(); } void verify() { ShouldNotCallThis(); } static bool is_call_before(address return_address) { ShouldNotCallThis(); } }; inline NativeCall* nativeCall_before(address return_address) { ShouldNotCallThis(); } inline NativeCall* nativeCall_at(address address) { ShouldNotCallThis(); } class NativeMovConstReg : public NativeInstruction { public: address next_instruction_address() const { ShouldNotCallThis(); } intptr_t data() const { ShouldNotCallThis(); } void set_data(intptr_t x) { ShouldNotCallThis(); } }; inline NativeMovConstReg* nativeMovConstReg_at(address address) { ShouldNotCallThis(); } class NativeMovRegMem : public NativeInstruction { public: int offset() const { ShouldNotCallThis(); } void set_offset(intptr_t x) { ShouldNotCallThis(); } void add_offset_in_bytes(int add_offset) { ShouldNotCallThis(); } }; inline NativeMovRegMem* nativeMovRegMem_at(address address) { ShouldNotCallThis(); } class NativeJump : public NativeInstruction { public: enum zero_specific_constants { instruction_size = 0 // not used within the interpreter }; address jump_destination() const { ShouldNotCallThis(); } void set_jump_destination(address dest) { ShouldNotCallThis(); } static void check_verified_entry_alignment(address entry, address verified_entry) { } static void patch_verified_entry(address entry, address verified_entry, address dest); }; inline NativeJump* nativeJump_at(address address) { ShouldNotCallThis(); } class NativeGeneralJump : public NativeInstruction { public: address jump_destination() const { ShouldNotCallThis(); } static void insert_unconditional(address code_pos, address entry) { ShouldNotCallThis(); } static void replace_mt_safe(address instr_addr, address code_buffer) { ShouldNotCallThis(); } }; inline NativeGeneralJump* nativeGeneralJump_at(address address) { ShouldNotCallThis(); }