Mercurial > hg > graal-compiler
view src/share/vm/utilities/elfStringTable.cpp @ 17108:dbb08e742d87
Add optional graph dump before each compiler phase.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Mon, 15 Sep 2014 17:16:53 +0200 |
parents | 4ca6dc0799b6 |
children | 52b4284cb496 |
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/* * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #if !defined(_WINDOWS) && !defined(__APPLE__) #include "memory/allocation.inline.hpp" #include "runtime/os.hpp" #include "utilities/elfStringTable.hpp" // We will try to load whole string table into memory if we can. // Otherwise, fallback to more expensive file operation. ElfStringTable::ElfStringTable(FILE* file, Elf_Shdr shdr, int index) { assert(file, "null file handle"); m_table = NULL; m_index = index; m_next = NULL; m_file = file; m_status = NullDecoder::no_error; // try to load the string table long cur_offset = ftell(file); m_table = (char*)os::malloc(sizeof(char) * shdr.sh_size, mtInternal); if (m_table != NULL) { // if there is an error, mark the error if (fseek(file, shdr.sh_offset, SEEK_SET) || fread((void*)m_table, shdr.sh_size, 1, file) != 1 || fseek(file, cur_offset, SEEK_SET)) { m_status = NullDecoder::file_invalid; os::free((void*)m_table); m_table = NULL; } } else { memcpy(&m_shdr, &shdr, sizeof(Elf_Shdr)); } } ElfStringTable::~ElfStringTable() { if (m_table != NULL) { os::free((void*)m_table); } if (m_next != NULL) { delete m_next; } } bool ElfStringTable::string_at(int pos, char* buf, int buflen) { if (NullDecoder::is_error(m_status)) { return false; } if (m_table != NULL) { jio_snprintf(buf, buflen, "%s", (const char*)(m_table + pos)); return true; } else { long cur_pos = ftell(m_file); if (cur_pos == -1 || fseek(m_file, m_shdr.sh_offset + pos, SEEK_SET) || fread(buf, 1, buflen, m_file) <= 0 || fseek(m_file, cur_pos, SEEK_SET)) { m_status = NullDecoder::file_invalid; return false; } return true; } } #endif // _WINDOWS