Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/utilities/elfStringTable.cpp@36c186bcc085 (annotated)
src/share/vm/utilities/elfStringTable.cpp
Mon, 03 Jan 2011 14:09:11 -0500
- author
- coleenp
- date
- Mon, 03 Jan 2011 14:09:11 -0500
- changeset 2418
- 36c186bcc085
- parent 2364
- 2d4762ec74af
- child 2834
- 2a3da7eaf4a6
- permissions
- -rw-r--r--
6302804: Hotspot VM dies ungraceful death when C heap is exhausted in various places.
Summary: enhance the error reporting mechanism to help user to fix the problem rather than making it look like a VM error.
Reviewed-by: kvn, kamg
| 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 | |
| zgu@2364 | 27 | #ifndef _WINDOWS |
| zgu@2364 | 28 | |
| zgu@2364 | 29 | #include "memory/allocation.inline.hpp" |
| zgu@2364 | 30 | #include "utilities/elfStringTable.hpp" |
| zgu@2364 | 31 | |
| zgu@2364 | 32 | // We will try to load whole string table into memory if we can. |
| zgu@2364 | 33 | // Otherwise, fallback to more expensive file operation. |
| zgu@2364 | 34 | ElfStringTable::ElfStringTable(FILE* file, Elf_Shdr shdr, int index) { |
| zgu@2364 | 35 | assert(file, "null file handle"); |
| zgu@2364 | 36 | m_table = NULL; |
| zgu@2364 | 37 | m_index = index; |
| zgu@2364 | 38 | m_next = NULL; |
| zgu@2364 | 39 | m_file = file; |
| zgu@2364 | 40 | m_status = Decoder::no_error; |
| zgu@2364 | 41 | |
| zgu@2364 | 42 | // try to load the string table |
| zgu@2364 | 43 | long cur_offset = ftell(file); |
| zgu@2364 | 44 | m_table = (char*)NEW_C_HEAP_ARRAY(char, shdr.sh_size); |
| zgu@2364 | 45 | if (m_table != NULL) { |
| zgu@2364 | 46 | // if there is an error, mark the error |
| zgu@2364 | 47 | if (fseek(file, shdr.sh_offset, SEEK_SET) || |
| zgu@2364 | 48 | fread((void*)m_table, shdr.sh_size, 1, file) != 1 || |
| zgu@2364 | 49 | fseek(file, cur_offset, SEEK_SET)) { |
| zgu@2364 | 50 | m_status = Decoder::file_invalid; |
| zgu@2364 | 51 | FREE_C_HEAP_ARRAY(char, m_table); |
| zgu@2364 | 52 | m_table = NULL; |
| zgu@2364 | 53 | } |
| zgu@2364 | 54 | } else { |
| zgu@2364 | 55 | memcpy(&m_shdr, &shdr, sizeof(Elf_Shdr)); |
| zgu@2364 | 56 | } |
| zgu@2364 | 57 | } |
| zgu@2364 | 58 | |
| zgu@2364 | 59 | ElfStringTable::~ElfStringTable() { |
| zgu@2364 | 60 | if (m_table != NULL) { |
| zgu@2364 | 61 | FREE_C_HEAP_ARRAY(char, m_table); |
| zgu@2364 | 62 | } |
| zgu@2364 | 63 | |
| zgu@2364 | 64 | if (m_next != NULL) { |
| zgu@2364 | 65 | delete m_next; |
| zgu@2364 | 66 | } |
| zgu@2364 | 67 | } |
| zgu@2364 | 68 | |
| zgu@2364 | 69 | const char* ElfStringTable::string_at(int pos) { |
| zgu@2364 | 70 | if (m_status != Decoder::no_error) { |
| zgu@2364 | 71 | return NULL; |
| zgu@2364 | 72 | } |
| zgu@2364 | 73 | if (m_table != NULL) { |
| zgu@2364 | 74 | return (const char*)(m_table + pos); |
| zgu@2364 | 75 | } else { |
| zgu@2364 | 76 | long cur_pos = ftell(m_file); |
| zgu@2364 | 77 | if (cur_pos == -1 || |
| zgu@2364 | 78 | fseek(m_file, m_shdr.sh_offset + pos, SEEK_SET) || |
| zgu@2364 | 79 | fread(m_symbol, 1, MAX_SYMBOL_LEN, m_file) <= 0 || |
| zgu@2364 | 80 | fseek(m_file, cur_pos, SEEK_SET)) { |
| zgu@2364 | 81 | m_status = Decoder::file_invalid; |
| zgu@2364 | 82 | return NULL; |
| zgu@2364 | 83 | } |
| zgu@2364 | 84 | return (const char*)m_symbol; |
| zgu@2364 | 85 | } |
| zgu@2364 | 86 | } |
| zgu@2364 | 87 | |
| zgu@2364 | 88 | #endif // _WINDOWS |
| zgu@2364 | 89 |
