Mercurial > hg > truffle
view src/cpu/zero/vm/assembler_zero.cpp @ 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, 2007, Oracle and/or its affiliates. All rights reserved. * Copyright 2007, 2008, 2009 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. * */ #include "incls/_precompiled.incl" #include "incls/_assembler_zero.cpp.incl" int AbstractAssembler::code_fill_byte() { return 0; } void Assembler::pd_patch_instruction(address branch, address target) { ShouldNotCallThis(); } #ifndef PRODUCT void Assembler::pd_print_patched_instruction(address branch) { ShouldNotCallThis(); } #endif // PRODUCT void MacroAssembler::align(int modulus) { while (offset() % modulus != 0) emit_byte(AbstractAssembler::code_fill_byte()); } void MacroAssembler::bang_stack_with_offset(int offset) { ShouldNotCallThis(); } void MacroAssembler::advance(int bytes) { _code_pos += bytes; sync(); } RegisterOrConstant MacroAssembler::delayed_value_impl( intptr_t* delayed_value_addr, Register tmpl, int offset) { ShouldNotCallThis(); } void MacroAssembler::store_oop(jobject obj) { code_section()->relocate(pc(), oop_Relocation::spec_for_immediate()); emit_address((address) obj); } static void should_not_call() { report_should_not_call(__FILE__, __LINE__); } address ShouldNotCallThisStub() { return (address) should_not_call; } address ShouldNotCallThisEntry() { return (address) should_not_call; }