Mercurial > hg > graal-jvmci-8
view src/share/vm/shark/sharkStateScanner.cpp @ 12110:4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
Summary: Replace the broken large pages implementation on Linux. New flag: -XX:+UseTransparentHugePages - Linux specific flag to turn on transparent huge page hinting with madvise(..., MAP_HUGETLB). Changed behavior: -XX:+UseLargePages - tries to use -XX:+UseTransparentHugePages before trying other large pages implementations (on Linux). Changed behavior: -XX:+UseHugeTLBFS - Use upfront allocation of Large Pages instead of using the broken implementation to dynamically committing large pages. Changed behavior: -XX:LargePageSizeInBytes - Turned off the ability to use this flag on Linux and provides warning to user if set to a value different than the OS chosen large page size. Changed behavior: Setting no large page size - Now defaults to use -XX:UseTransparentHugePages if the OS supports it. Previously, -XX:+UseHugeTLBFS was chosen if the OS was configured to use large pages.
Reviewed-by: tschatzl, dcubed, brutisso
author | stefank |
---|---|
date | Fri, 16 Aug 2013 13:22:32 +0200 |
parents | f95d63e2154a |
children |
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/* * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright 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 "precompiled.hpp" #include "shark/sharkState.hpp" #include "shark/sharkStateScanner.hpp" using namespace llvm; void SharkStateScanner::scan(SharkState* state) { start_frame(); // Expression stack stack_integrity_checks(state); start_stack(state->stack_depth()); for (int i = state->stack_depth() - 1; i >= 0; i--) { process_stack_slot( i, state->stack_addr(i), stack()->stack_slots_offset() + i + max_stack() - state->stack_depth()); } end_stack(); // Monitors start_monitors(state->num_monitors()); for (int i = 0; i < state->num_monitors(); i++) { process_monitor( i, stack()->monitor_offset(i), stack()->monitor_object_offset(i)); } end_monitors(); // Frame header start_frame_header(); process_oop_tmp_slot( state->oop_tmp_addr(), stack()->oop_tmp_slot_offset()); process_method_slot(state->method_addr(), stack()->method_slot_offset()); process_pc_slot(stack()->pc_slot_offset()); end_frame_header(); // Local variables locals_integrity_checks(state); start_locals(); for (int i = 0; i < max_locals(); i++) { process_local_slot( i, state->local_addr(i), stack()->locals_slots_offset() + max_locals() - 1 - i); } end_locals(); end_frame(); } #ifndef PRODUCT void SharkStateScanner::stack_integrity_checks(SharkState* state) { for (int i = 0; i < state->stack_depth(); i++) { if (state->stack(i)) { if (state->stack(i)->is_two_word()) assert(state->stack(i - 1) == NULL, "should be"); } else { assert(state->stack(i + 1)->is_two_word(), "should be"); } } } void SharkStateScanner::locals_integrity_checks(SharkState* state) { for (int i = 0; i < max_locals(); i++) { if (state->local(i)) { if (state->local(i)->is_two_word()) assert(state->local(i + 1) == NULL, "should be"); } } } #endif // !PRODUCT