Mercurial > hg > truffle
view src/share/vm/gc_implementation/parallelScavenge/psVirtualspace.cpp @ 11646:8f8f6afeb97a
New caching mechanism in TruffleCache for better compilation performance. Clean up of partial evaluator phases.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sun, 15 Sep 2013 16:27:07 +0200 |
parents | a837fa3d3f86 |
children | bdd155477289 |
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/* * Copyright (c) 2003, 2013, 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/parallelScavenge/psVirtualspace.hpp" #include "runtime/os.hpp" #include "runtime/virtualspace.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_bsd # include "os_bsd.inline.hpp" #endif // PSVirtualSpace PSVirtualSpace::PSVirtualSpace(ReservedSpace rs, size_t alignment) : _alignment(alignment) { set_reserved(rs); set_committed(reserved_low_addr(), reserved_low_addr()); DEBUG_ONLY(verify()); } PSVirtualSpace::PSVirtualSpace(ReservedSpace rs) : _alignment(os::vm_page_size()) { set_reserved(rs); set_committed(reserved_low_addr(), reserved_low_addr()); DEBUG_ONLY(verify()); } // Deprecated. PSVirtualSpace::PSVirtualSpace(): _alignment(os::vm_page_size()) { } // Deprecated. bool PSVirtualSpace::initialize(ReservedSpace rs, size_t commit_size) { set_reserved(rs); set_committed(reserved_low_addr(), reserved_low_addr()); // Commit to initial size. assert(commit_size <= rs.size(), "commit_size too big"); bool result = commit_size > 0 ? expand_by(commit_size) : true; DEBUG_ONLY(verify()); return result; } PSVirtualSpace::~PSVirtualSpace() { release(); } bool PSVirtualSpace::contains(void* p) const { char* const cp = (char*)p; return cp >= committed_low_addr() && cp < committed_high_addr(); } void PSVirtualSpace::release() { DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); // This may not release memory it didn't reserve. // Use rs.release() to release the underlying memory instead. _reserved_low_addr = _reserved_high_addr = NULL; _committed_low_addr = _committed_high_addr = NULL; _special = false; } bool PSVirtualSpace::expand_by(size_t bytes) { assert(is_aligned(bytes), "arg not aligned"); DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); if (uncommitted_size() < bytes) { return false; } char* const base_addr = committed_high_addr(); bool result = special() || os::commit_memory(base_addr, bytes, alignment(), !ExecMem); if (result) { _committed_high_addr += bytes; } return result; } bool PSVirtualSpace::shrink_by(size_t bytes) { assert(is_aligned(bytes), "arg not aligned"); DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); if (committed_size() < bytes) { return false; } char* const base_addr = committed_high_addr() - bytes; bool result = special() || os::uncommit_memory(base_addr, bytes); if (result) { _committed_high_addr -= bytes; } return result; } size_t PSVirtualSpace::expand_into(PSVirtualSpace* other_space, size_t bytes) { assert(is_aligned(bytes), "arg not aligned"); assert(grows_up(), "this space must grow up"); assert(other_space->grows_down(), "other space must grow down"); assert(reserved_high_addr() == other_space->reserved_low_addr(), "spaces not contiguous"); assert(special() == other_space->special(), "one space is special, the other is not"); DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); DEBUG_ONLY(PSVirtualSpaceVerifier other_verifier(other_space)); size_t bytes_needed = bytes; // First use the uncommitted region in this space. size_t tmp_bytes = MIN2(uncommitted_size(), bytes_needed); if (tmp_bytes > 0) { if (expand_by(tmp_bytes)) { bytes_needed -= tmp_bytes; } else { return 0; } } // Next take from the uncommitted region in the other space, and commit it. tmp_bytes = MIN2(other_space->uncommitted_size(), bytes_needed); if (tmp_bytes > 0) { char* const commit_base = committed_high_addr(); if (other_space->special() || os::commit_memory(commit_base, tmp_bytes, alignment(), !ExecMem)) { // Reduce the reserved region in the other space. other_space->set_reserved(other_space->reserved_low_addr() + tmp_bytes, other_space->reserved_high_addr(), other_space->special()); // Grow both reserved and committed in this space. _reserved_high_addr += tmp_bytes; _committed_high_addr += tmp_bytes; bytes_needed -= tmp_bytes; } else { return bytes - bytes_needed; } } // Finally take from the already committed region in the other space. tmp_bytes = bytes_needed; if (tmp_bytes > 0) { // Reduce both committed and reserved in the other space. other_space->set_committed(other_space->committed_low_addr() + tmp_bytes, other_space->committed_high_addr()); other_space->set_reserved(other_space->reserved_low_addr() + tmp_bytes, other_space->reserved_high_addr(), other_space->special()); // Grow both reserved and committed in this space. _reserved_high_addr += tmp_bytes; _committed_high_addr += tmp_bytes; } return bytes; } #ifndef PRODUCT bool PSVirtualSpace::is_aligned(size_t value, size_t align) { const size_t tmp_value = value + align - 1; const size_t mask = ~(align - 1); return (tmp_value & mask) == value; } bool PSVirtualSpace::is_aligned(size_t value) const { return is_aligned(value, alignment()); } bool PSVirtualSpace::is_aligned(char* value) const { return is_aligned((size_t)value); } void PSVirtualSpace::verify() const { assert(is_aligned(alignment(), os::vm_page_size()), "bad alignment"); assert(is_aligned(reserved_low_addr()), "bad reserved_low_addr"); assert(is_aligned(reserved_high_addr()), "bad reserved_high_addr"); assert(is_aligned(committed_low_addr()), "bad committed_low_addr"); assert(is_aligned(committed_high_addr()), "bad committed_high_addr"); // Reserved region must be non-empty or both addrs must be 0. assert(reserved_low_addr() < reserved_high_addr() || reserved_low_addr() == NULL && reserved_high_addr() == NULL, "bad reserved addrs"); assert(committed_low_addr() <= committed_high_addr(), "bad committed addrs"); if (grows_up()) { assert(reserved_low_addr() == committed_low_addr(), "bad low addrs"); assert(reserved_high_addr() >= committed_high_addr(), "bad high addrs"); } else { assert(reserved_high_addr() == committed_high_addr(), "bad high addrs"); assert(reserved_low_addr() <= committed_low_addr(), "bad low addrs"); } } void PSVirtualSpace::print() const { gclog_or_tty->print_cr("virtual space [" PTR_FORMAT "]: alignment=" SIZE_FORMAT "K grows %s%s", this, alignment() / K, grows_up() ? "up" : "down", special() ? " (pinned in memory)" : ""); gclog_or_tty->print_cr(" reserved=" SIZE_FORMAT "K" " [" PTR_FORMAT "," PTR_FORMAT "]" " committed=" SIZE_FORMAT "K" " [" PTR_FORMAT "," PTR_FORMAT "]", reserved_size() / K, reserved_low_addr(), reserved_high_addr(), committed_size() / K, committed_low_addr(), committed_high_addr()); } #endif // #ifndef PRODUCT void PSVirtualSpace::print_space_boundaries_on(outputStream* st) const { st->print_cr(" [" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT ")", low_boundary(), high(), high_boundary()); } PSVirtualSpaceHighToLow::PSVirtualSpaceHighToLow(ReservedSpace rs, size_t alignment) : PSVirtualSpace(alignment) { set_reserved(rs); set_committed(reserved_high_addr(), reserved_high_addr()); DEBUG_ONLY(verify()); } PSVirtualSpaceHighToLow::PSVirtualSpaceHighToLow(ReservedSpace rs) { set_reserved(rs); set_committed(reserved_high_addr(), reserved_high_addr()); DEBUG_ONLY(verify()); } bool PSVirtualSpaceHighToLow::expand_by(size_t bytes) { assert(is_aligned(bytes), "arg not aligned"); DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); if (uncommitted_size() < bytes) { return false; } char* const base_addr = committed_low_addr() - bytes; bool result = special() || os::commit_memory(base_addr, bytes, alignment(), !ExecMem); if (result) { _committed_low_addr -= bytes; } return result; } bool PSVirtualSpaceHighToLow::shrink_by(size_t bytes) { assert(is_aligned(bytes), "arg not aligned"); DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); if (committed_size() < bytes) { return false; } char* const base_addr = committed_low_addr(); bool result = special() || os::uncommit_memory(base_addr, bytes); if (result) { _committed_low_addr += bytes; } return result; } size_t PSVirtualSpaceHighToLow::expand_into(PSVirtualSpace* other_space, size_t bytes) { assert(is_aligned(bytes), "arg not aligned"); assert(grows_down(), "this space must grow down"); assert(other_space->grows_up(), "other space must grow up"); assert(reserved_low_addr() == other_space->reserved_high_addr(), "spaces not contiguous"); assert(special() == other_space->special(), "one space is special in memory, the other is not"); DEBUG_ONLY(PSVirtualSpaceVerifier this_verifier(this)); DEBUG_ONLY(PSVirtualSpaceVerifier other_verifier(other_space)); size_t bytes_needed = bytes; // First use the uncommitted region in this space. size_t tmp_bytes = MIN2(uncommitted_size(), bytes_needed); if (tmp_bytes > 0) { if (expand_by(tmp_bytes)) { bytes_needed -= tmp_bytes; } else { return 0; } } // Next take from the uncommitted region in the other space, and commit it. tmp_bytes = MIN2(other_space->uncommitted_size(), bytes_needed); if (tmp_bytes > 0) { char* const commit_base = committed_low_addr() - tmp_bytes; if (other_space->special() || os::commit_memory(commit_base, tmp_bytes, alignment(), !ExecMem)) { // Reduce the reserved region in the other space. other_space->set_reserved(other_space->reserved_low_addr(), other_space->reserved_high_addr() - tmp_bytes, other_space->special()); // Grow both reserved and committed in this space. _reserved_low_addr -= tmp_bytes; _committed_low_addr -= tmp_bytes; bytes_needed -= tmp_bytes; } else { return bytes - bytes_needed; } } // Finally take from the already committed region in the other space. tmp_bytes = bytes_needed; if (tmp_bytes > 0) { // Reduce both committed and reserved in the other space. other_space->set_committed(other_space->committed_low_addr(), other_space->committed_high_addr() - tmp_bytes); other_space->set_reserved(other_space->reserved_low_addr(), other_space->reserved_high_addr() - tmp_bytes, other_space->special()); // Grow both reserved and committed in this space. _reserved_low_addr -= tmp_bytes; _committed_low_addr -= tmp_bytes; } return bytes; } void PSVirtualSpaceHighToLow::print_space_boundaries_on(outputStream* st) const { st->print_cr(" (" PTR_FORMAT ", " PTR_FORMAT ", " PTR_FORMAT "]", high_boundary(), low(), low_boundary()); }