Mercurial > jdk8-mips64-public > hotspot / annotate
src/os/linux/vm/decoder_linux.cpp@4c84d351cca9 (annotated)
src/os/linux/vm/decoder_linux.cpp
Fri, 16 Aug 2013 13:22:32 +0200
- author
- stefank
- date
- Fri, 16 Aug 2013 13:22:32 +0200
- changeset 5578
- 4c84d351cca9
- parent 4153
- b9a9ed0f8eeb
- child 6491
- e7cbc95179c4
- permissions
- -rw-r--r--
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
| zgu@2364 | 1 | /* |
| mikael@4153 | 2 | * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| zgu@2364 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| zgu@2364 | 4 | * |
| zgu@2364 | 5 | * This code is free software; you can redistribute it and/or modify it |
| zgu@2364 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| zgu@2364 | 7 | * published by the Free Software Foundation. |
| zgu@2364 | 8 | * |
| zgu@2364 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| zgu@2364 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| zgu@2364 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| zgu@2364 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| zgu@2364 | 13 | * accompanied this code). |
| zgu@2364 | 14 | * |
| zgu@2364 | 15 | * You should have received a copy of the GNU General Public License version |
| zgu@2364 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| zgu@2364 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| zgu@2364 | 18 | * |
| zgu@2364 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| zgu@2364 | 20 | * or visit www.oracle.com if you need additional information or have any |
| zgu@2364 | 21 | * questions. |
| zgu@2364 | 22 | * |
| zgu@2364 | 23 | */ |
| zgu@2364 | 24 | |
| zgu@2364 | 25 | #include "prims/jvm.h" |
| zgu@3430 | 26 | #include "utilities/decoder_elf.hpp" |
| zgu@2364 | 27 | |
| zgu@2364 | 28 | #include <cxxabi.h> |
| zgu@2364 | 29 | |
| zgu@3430 | 30 | bool ElfDecoder::demangle(const char* symbol, char *buf, int buflen) { |
| zgu@2364 | 31 | int status; |
| zgu@2364 | 32 | char* result; |
| zgu@2364 | 33 | size_t size = (size_t)buflen; |
| zgu@2364 | 34 | |
| zgu@2364 | 35 | // Don't pass buf to __cxa_demangle. In case of the 'buf' is too small, |
| zgu@2364 | 36 | // __cxa_demangle will call system "realloc" for additional memory, which |
| zgu@2364 | 37 | // may use different malloc/realloc mechanism that allocates 'buf'. |
| zgu@2364 | 38 | if ((result = abi::__cxa_demangle(symbol, NULL, NULL, &status)) != NULL) { |
| zgu@2364 | 39 | jio_snprintf(buf, buflen, "%s", result); |
| zgu@2364 | 40 | // call c library's free |
| zgu@2364 | 41 | ::free(result); |
| zgu@2364 | 42 | return true; |
| zgu@2364 | 43 | } |
| zgu@2364 | 44 | return false; |
| zgu@2364 | 45 | } |
| zgu@3430 | 46 |
