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src/share/vm/utilities/elfStringTable.cpp@752ba2e5f6d0 (annotated)
src/share/vm/utilities/elfStringTable.cpp
Tue, 25 Feb 2014 15:11:18 -0800
- author
- kvn
- date
- Tue, 25 Feb 2014 15:11:18 -0800
- changeset 6507
- 752ba2e5f6d0
- parent 6491
- e7cbc95179c4
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
Merge
| zgu@2364 | 1 | /* |
| simonis@6491 | 2 | * Copyright (c) 1997, 2013, 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@3430 | 41 | m_status = NullDecoder::no_error; |
| zgu@2364 | 42 | |
| zgu@2364 | 43 | // try to load the string table |
| zgu@2364 | 44 | long cur_offset = ftell(file); |
| zgu@3900 | 45 | m_table = (char*)os::malloc(sizeof(char) * shdr.sh_size, mtInternal); |
| 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@3430 | 51 | m_status = NullDecoder::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@3430 | 70 | bool ElfStringTable::string_at(int pos, char* buf, int buflen) { |
| zgu@3430 | 71 | if (NullDecoder::is_error(m_status)) { |
| zgu@3430 | 72 | return false; |
| zgu@2364 | 73 | } |
| zgu@2364 | 74 | if (m_table != NULL) { |
| zgu@3430 | 75 | jio_snprintf(buf, buflen, "%s", (const char*)(m_table + pos)); |
| zgu@3430 | 76 | return true; |
| zgu@2364 | 77 | } else { |
| zgu@2364 | 78 | long cur_pos = ftell(m_file); |
| zgu@2364 | 79 | if (cur_pos == -1 || |
| zgu@2364 | 80 | fseek(m_file, m_shdr.sh_offset + pos, SEEK_SET) || |
| zgu@3430 | 81 | fread(buf, 1, buflen, m_file) <= 0 || |
| zgu@2364 | 82 | fseek(m_file, cur_pos, SEEK_SET)) { |
| zgu@3430 | 83 | m_status = NullDecoder::file_invalid; |
| zgu@3430 | 84 | return false; |
| zgu@2364 | 85 | } |
| zgu@3430 | 86 | return true; |
| zgu@2364 | 87 | } |
| zgu@2364 | 88 | } |
| zgu@2364 | 89 | |
| simonis@6491 | 90 | #endif // !_WINDOWS && !__APPLE__ |
