Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/utilities/elfStringTable.cpp@f08d439fab8c (annotated)
src/share/vm/utilities/elfStringTable.cpp
Sun, 25 Sep 2011 16:03:29 -0700
- author
- never
- date
- Sun, 25 Sep 2011 16:03:29 -0700
- changeset 3156
- f08d439fab8c
- parent 2834
- 2a3da7eaf4a6
- child 3430
- d7e3846464d0
- permissions
- -rw-r--r--
7089790: integrate bsd-port changes
Reviewed-by: kvn, twisti, jrose
Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
| zgu@2364 | 1 | /* |
| zgu@2364 | 2 | * Copyright (c) 1997, 2010, 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 "precompiled.hpp" |
| zgu@2364 | 26 | |
| never@3156 | 27 | #if !defined(_WINDOWS) && !defined(__APPLE__) |
| zgu@2364 | 28 | |
| zgu@2364 | 29 | #include "memory/allocation.inline.hpp" |
| zgu@2834 | 30 | #include "runtime/os.hpp" |
| zgu@2364 | 31 | #include "utilities/elfStringTable.hpp" |
| zgu@2364 | 32 | |
| zgu@2364 | 33 | // We will try to load whole string table into memory if we can. |
| zgu@2364 | 34 | // Otherwise, fallback to more expensive file operation. |
| zgu@2364 | 35 | ElfStringTable::ElfStringTable(FILE* file, Elf_Shdr shdr, int index) { |
| zgu@2364 | 36 | assert(file, "null file handle"); |
| zgu@2364 | 37 | m_table = NULL; |
| zgu@2364 | 38 | m_index = index; |
| zgu@2364 | 39 | m_next = NULL; |
| zgu@2364 | 40 | m_file = file; |
| zgu@2364 | 41 | m_status = Decoder::no_error; |
| zgu@2364 | 42 | |
| zgu@2364 | 43 | // try to load the string table |
| zgu@2364 | 44 | long cur_offset = ftell(file); |
| zgu@2834 | 45 | m_table = (char*)os::malloc(sizeof(char) * shdr.sh_size); |
| zgu@2364 | 46 | if (m_table != NULL) { |
| zgu@2364 | 47 | // if there is an error, mark the error |
| zgu@2364 | 48 | if (fseek(file, shdr.sh_offset, SEEK_SET) || |
| zgu@2364 | 49 | fread((void*)m_table, shdr.sh_size, 1, file) != 1 || |
| zgu@2364 | 50 | fseek(file, cur_offset, SEEK_SET)) { |
| zgu@2364 | 51 | m_status = Decoder::file_invalid; |
| zgu@2834 | 52 | os::free((void*)m_table); |
| zgu@2364 | 53 | m_table = NULL; |
| zgu@2364 | 54 | } |
| zgu@2364 | 55 | } else { |
| zgu@2364 | 56 | memcpy(&m_shdr, &shdr, sizeof(Elf_Shdr)); |
| zgu@2364 | 57 | } |
| zgu@2364 | 58 | } |
| zgu@2364 | 59 | |
| zgu@2364 | 60 | ElfStringTable::~ElfStringTable() { |
| zgu@2364 | 61 | if (m_table != NULL) { |
| zgu@2834 | 62 | os::free((void*)m_table); |
| zgu@2364 | 63 | } |
| zgu@2364 | 64 | |
| zgu@2364 | 65 | if (m_next != NULL) { |
| zgu@2364 | 66 | delete m_next; |
| zgu@2364 | 67 | } |
| zgu@2364 | 68 | } |
| zgu@2364 | 69 | |
| zgu@2364 | 70 | const char* ElfStringTable::string_at(int pos) { |
| zgu@2364 | 71 | if (m_status != Decoder::no_error) { |
| zgu@2364 | 72 | return NULL; |
| zgu@2364 | 73 | } |
| zgu@2364 | 74 | if (m_table != NULL) { |
| zgu@2364 | 75 | return (const char*)(m_table + pos); |
| zgu@2364 | 76 | } else { |
| zgu@2364 | 77 | long cur_pos = ftell(m_file); |
| zgu@2364 | 78 | if (cur_pos == -1 || |
| zgu@2364 | 79 | fseek(m_file, m_shdr.sh_offset + pos, SEEK_SET) || |
| zgu@2364 | 80 | fread(m_symbol, 1, MAX_SYMBOL_LEN, m_file) <= 0 || |
| zgu@2364 | 81 | fseek(m_file, cur_pos, SEEK_SET)) { |
| zgu@2364 | 82 | m_status = Decoder::file_invalid; |
| zgu@2364 | 83 | return NULL; |
| zgu@2364 | 84 | } |
| zgu@2364 | 85 | return (const char*)m_symbol; |
| zgu@2364 | 86 | } |
| zgu@2364 | 87 | } |
| zgu@2364 | 88 | |
| zgu@2364 | 89 | #endif // _WINDOWS |
