Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/utilities/elfStringTable.cpp
src/share/vm/utilities/elfStringTable.cpp
- changeset 0
- f90c822e73f8
- child 6876
- 710a3c8b516e
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| -1:000000000000 | 0:f90c822e73f8 |
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| 1 /* | |
| 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "precompiled.hpp" | |
| 26 | |
| 27 #if !defined(_WINDOWS) && !defined(__APPLE__) | |
| 28 | |
| 29 #include "memory/allocation.inline.hpp" | |
| 30 #include "runtime/os.hpp" | |
| 31 #include "utilities/elfStringTable.hpp" | |
| 32 | |
| 33 // We will try to load whole string table into memory if we can. | |
| 34 // Otherwise, fallback to more expensive file operation. | |
| 35 ElfStringTable::ElfStringTable(FILE* file, Elf_Shdr shdr, int index) { | |
| 36 assert(file, "null file handle"); | |
| 37 m_table = NULL; | |
| 38 m_index = index; | |
| 39 m_next = NULL; | |
| 40 m_file = file; | |
| 41 m_status = NullDecoder::no_error; | |
| 42 | |
| 43 // try to load the string table | |
| 44 long cur_offset = ftell(file); | |
| 45 m_table = (char*)os::malloc(sizeof(char) * shdr.sh_size, mtInternal); | |
| 46 if (m_table != NULL) { | |
| 47 // if there is an error, mark the error | |
| 48 if (fseek(file, shdr.sh_offset, SEEK_SET) || | |
| 49 fread((void*)m_table, shdr.sh_size, 1, file) != 1 || | |
| 50 fseek(file, cur_offset, SEEK_SET)) { | |
| 51 m_status = NullDecoder::file_invalid; | |
| 52 os::free((void*)m_table); | |
| 53 m_table = NULL; | |
| 54 } | |
| 55 } else { | |
| 56 memcpy(&m_shdr, &shdr, sizeof(Elf_Shdr)); | |
| 57 } | |
| 58 } | |
| 59 | |
| 60 ElfStringTable::~ElfStringTable() { | |
| 61 if (m_table != NULL) { | |
| 62 os::free((void*)m_table); | |
| 63 } | |
| 64 | |
| 65 if (m_next != NULL) { | |
| 66 delete m_next; | |
| 67 } | |
| 68 } | |
| 69 | |
| 70 bool ElfStringTable::string_at(int pos, char* buf, int buflen) { | |
| 71 if (NullDecoder::is_error(m_status)) { | |
| 72 return false; | |
| 73 } | |
| 74 if (m_table != NULL) { | |
| 75 jio_snprintf(buf, buflen, "%s", (const char*)(m_table + pos)); | |
| 76 return true; | |
| 77 } else { | |
| 78 long cur_pos = ftell(m_file); | |
| 79 if (cur_pos == -1 || | |
| 80 fseek(m_file, m_shdr.sh_offset + pos, SEEK_SET) || | |
| 81 fread(buf, 1, buflen, m_file) <= 0 || | |
| 82 fseek(m_file, cur_pos, SEEK_SET)) { | |
| 83 m_status = NullDecoder::file_invalid; | |
| 84 return false; | |
| 85 } | |
| 86 return true; | |
| 87 } | |
| 88 } | |
| 89 | |
| 90 #endif // !_WINDOWS && !__APPLE__ |
