Mercurial > hg > graal-compiler
view src/share/vm/utilities/elfFuncDescTable.cpp @ 20556:8585e75970c7
8049071: Add jtreg jobs to JPRT for hotspot
Reviewed-by: dholmes, iveresov
author | mikael |
---|---|
date | Thu, 16 Oct 2014 20:20:17 -0400 |
parents | e7cbc95179c4 |
children |
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/* * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. * Copyright 2012, 2013 SAP AG. 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 "utilities/elfFuncDescTable.hpp" ElfFuncDescTable::ElfFuncDescTable(FILE* file, Elf_Shdr shdr, int index) { assert(file, "null file handle"); // The actual function address (i.e. function entry point) is always the // first value in the function descriptor (on IA64 and PPC64 they look as follows): // PPC64: [function entry point, TOC pointer, environment pointer] // IA64 : [function entry point, GP (global pointer) value] // Unfortunately 'shdr.sh_entsize' doesn't always seem to contain this size (it's zero on PPC64) so we can't assert // assert(IA64_ONLY(2) PPC64_ONLY(3) * sizeof(address) == shdr.sh_entsize, "Size mismatch for '.opd' section entries"); m_funcDescs = NULL; m_file = file; m_index = index; m_status = NullDecoder::no_error; // try to load the function descriptor table long cur_offset = ftell(file); if (cur_offset != -1) { // call malloc so we can back up if memory allocation fails. m_funcDescs = (address*)os::malloc(shdr.sh_size, mtInternal); if (m_funcDescs) { if (fseek(file, shdr.sh_offset, SEEK_SET) || fread((void*)m_funcDescs, shdr.sh_size, 1, file) != 1 || fseek(file, cur_offset, SEEK_SET)) { m_status = NullDecoder::file_invalid; os::free(m_funcDescs); m_funcDescs = NULL; } } if (!NullDecoder::is_error(m_status)) { memcpy(&m_shdr, &shdr, sizeof(Elf_Shdr)); } } else { m_status = NullDecoder::file_invalid; } } ElfFuncDescTable::~ElfFuncDescTable() { if (m_funcDescs != NULL) { os::free(m_funcDescs); } } address ElfFuncDescTable::lookup(Elf_Word index) { if (NullDecoder::is_error(m_status)) { return NULL; } if (m_funcDescs != NULL) { if (m_shdr.sh_size > 0 && m_shdr.sh_addr <= index && index <= m_shdr.sh_addr + m_shdr.sh_size) { // Notice that 'index' is a byte-offset into the function descriptor table. return m_funcDescs[(index - m_shdr.sh_addr) / sizeof(address)]; } return NULL; } else { long cur_pos; address addr; if (!(m_shdr.sh_size > 0 && m_shdr.sh_addr <= index && index <= m_shdr.sh_addr + m_shdr.sh_size)) { // don't put the whole decoder in error mode if we just tried a wrong index return NULL; } if ((cur_pos = ftell(m_file)) == -1 || fseek(m_file, m_shdr.sh_offset + index - m_shdr.sh_addr, SEEK_SET) || fread(&addr, sizeof(addr), 1, m_file) != 1 || fseek(m_file, cur_pos, SEEK_SET)) { m_status = NullDecoder::file_invalid; return NULL; } return addr; } } #endif // !_WINDOWS && !__APPLE__