Mercurial > hg > truffle
view src/share/vm/gc_implementation/g1/g1PageBasedVirtualSpace.cpp @ 21791:cd36556e1b78
Remove conditional makefile-based compilation of jvmci from mx_graal.py
author | Stefan Anzinger <stefan.anzinger@oracle.com> |
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date | Mon, 08 Jun 2015 14:25:25 +0200 |
parents | ae52ee069062 |
children |
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/* * Copyright (c) 2014, 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. * */ #include "precompiled.hpp" #include "gc_implementation/g1/g1PageBasedVirtualSpace.hpp" #include "oops/markOop.hpp" #include "oops/oop.inline.hpp" #include "services/memTracker.hpp" #ifdef TARGET_OS_FAMILY_linux # include "os_linux.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_solaris # include "os_solaris.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_windows # include "os_windows.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_aix # include "os_aix.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_bsd # include "os_bsd.inline.hpp" #endif #include "utilities/bitMap.inline.hpp" G1PageBasedVirtualSpace::G1PageBasedVirtualSpace() : _low_boundary(NULL), _high_boundary(NULL), _committed(), _page_size(0), _special(false), _dirty(), _executable(false) { } bool G1PageBasedVirtualSpace::initialize_with_granularity(ReservedSpace rs, size_t page_size) { if (!rs.is_reserved()) { return false; // Allocation failed. } assert(_low_boundary == NULL, "VirtualSpace already initialized"); assert(page_size > 0, "Granularity must be non-zero."); _low_boundary = rs.base(); _high_boundary = _low_boundary + rs.size(); _special = rs.special(); _executable = rs.executable(); _page_size = page_size; assert(_committed.size() == 0, "virtual space initialized more than once"); uintx size_in_bits = rs.size() / page_size; _committed.resize(size_in_bits, /* in_resource_area */ false); if (_special) { _dirty.resize(size_in_bits, /* in_resource_area */ false); } return true; } G1PageBasedVirtualSpace::~G1PageBasedVirtualSpace() { release(); } void G1PageBasedVirtualSpace::release() { // This does not release memory it never reserved. // Caller must release via rs.release(); _low_boundary = NULL; _high_boundary = NULL; _special = false; _executable = false; _page_size = 0; _committed.resize(0, false); _dirty.resize(0, false); } size_t G1PageBasedVirtualSpace::committed_size() const { return _committed.count_one_bits() * _page_size; } size_t G1PageBasedVirtualSpace::reserved_size() const { return pointer_delta(_high_boundary, _low_boundary, sizeof(char)); } size_t G1PageBasedVirtualSpace::uncommitted_size() const { return reserved_size() - committed_size(); } uintptr_t G1PageBasedVirtualSpace::addr_to_page_index(char* addr) const { return (addr - _low_boundary) / _page_size; } bool G1PageBasedVirtualSpace::is_area_committed(uintptr_t start, size_t size_in_pages) const { uintptr_t end = start + size_in_pages; return _committed.get_next_zero_offset(start, end) >= end; } bool G1PageBasedVirtualSpace::is_area_uncommitted(uintptr_t start, size_t size_in_pages) const { uintptr_t end = start + size_in_pages; return _committed.get_next_one_offset(start, end) >= end; } char* G1PageBasedVirtualSpace::page_start(uintptr_t index) { return _low_boundary + index * _page_size; } size_t G1PageBasedVirtualSpace::byte_size_for_pages(size_t num) { return num * _page_size; } bool G1PageBasedVirtualSpace::commit(uintptr_t start, size_t size_in_pages) { // We need to make sure to commit all pages covered by the given area. guarantee(is_area_uncommitted(start, size_in_pages), "Specified area is not uncommitted"); bool zero_filled = true; uintptr_t end = start + size_in_pages; if (_special) { // Check for dirty pages and update zero_filled if any found. if (_dirty.get_next_one_offset(start,end) < end) { zero_filled = false; _dirty.clear_range(start, end); } } else { os::commit_memory_or_exit(page_start(start), byte_size_for_pages(size_in_pages), _executable, err_msg("Failed to commit pages from "SIZE_FORMAT" of length "SIZE_FORMAT, start, size_in_pages)); } _committed.set_range(start, end); return zero_filled; } void G1PageBasedVirtualSpace::uncommit(uintptr_t start, size_t size_in_pages) { guarantee(is_area_committed(start, size_in_pages), "checking"); if (_special) { // Mark that memory is dirty. If committed again the memory might // need to be cleared explicitly. _dirty.set_range(start, start + size_in_pages); } else { os::uncommit_memory(page_start(start), byte_size_for_pages(size_in_pages)); } _committed.clear_range(start, start + size_in_pages); } bool G1PageBasedVirtualSpace::contains(const void* p) const { return _low_boundary <= (const char*) p && (const char*) p < _high_boundary; } #ifndef PRODUCT void G1PageBasedVirtualSpace::print_on(outputStream* out) { out->print ("Virtual space:"); if (_special) out->print(" (pinned in memory)"); out->cr(); out->print_cr(" - committed: " SIZE_FORMAT, committed_size()); out->print_cr(" - reserved: " SIZE_FORMAT, reserved_size()); out->print_cr(" - [low_b, high_b]: [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", p2i(_low_boundary), p2i(_high_boundary)); } void G1PageBasedVirtualSpace::print() { print_on(tty); } #endif