truffle: src/share/vm/utilities/elfFile.cpp annotate

annotate src/share/vm/utilities/elfFile.cpp @ 20543:e7d0505c8a30

8059758: Footprint regressions with JDK-8038423 Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything. Reviewed-by: jwilhelm, brutisso

author	tschatzl
date	Fri, 10 Oct 2014 15:51:58 +0200
parents	31e80afe3fed
children	92aa6797d639 52b4284cb496

rev	line source
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	1 /*
14441 e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	4 *
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	7 * published by the Free Software Foundation.
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	8 *
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	13 * accompanied this code).
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	14 *
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	18 *
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	20 * or visit www.oracle.com if you need additional information or have any
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	21 * questions.
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	22 *
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	23 */
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	24
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	25 #include "precompiled.hpp"
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	26
3960 f08d439fab8c 7089790: integrate bsd-port changes never parents: 3302 diff changeset	27 #if !defined(_WINDOWS) && !defined(__APPLE__)
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	28
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	29 #include <string.h>
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	30 #include <stdio.h>
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	31 #include <limits.h>
3302 2a3da7eaf4a6 7036747: 7017009 reappeared, problem with ElfStringTable zgu parents: 2022 diff changeset	32 #include <new>
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	33
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	34 #include "memory/allocation.inline.hpp"
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	35 #include "utilities/decoder.hpp"
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	36 #include "utilities/elfFile.hpp"
14441 e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	37 #include "utilities/elfFuncDescTable.hpp"
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	38 #include "utilities/elfStringTable.hpp"
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	39 #include "utilities/elfSymbolTable.hpp"
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	40
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	41
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	42 ElfFile::ElfFile(const char* filepath) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	43 assert(filepath, "null file path");
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	44 memset(&m_elfHdr, 0, sizeof(m_elfHdr));
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	45 m_string_tables = NULL;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	46 m_symbol_tables = NULL;
14441 e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	47 m_funcDesc_table = NULL;
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	48 m_next = NULL;
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	49 m_status = NullDecoder::no_error;
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	50
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	51 int len = strlen(filepath) + 1;
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 4803 diff changeset	52 m_filepath = (const char)os::malloc(len sizeof(char), mtInternal);
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	53 if (m_filepath != NULL) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	54 strcpy((char*)m_filepath, filepath);
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	55 m_file = fopen(filepath, "r");
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	56 if (m_file != NULL) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	57 load_tables();
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	58 } else {
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	59 m_status = NullDecoder::file_not_found;
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	60 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	61 } else {
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	62 m_status = NullDecoder::out_of_memory;
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	63 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	64 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	65
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	66 ElfFile::~ElfFile() {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	67 if (m_string_tables != NULL) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	68 delete m_string_tables;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	69 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	70
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	71 if (m_symbol_tables != NULL) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	72 delete m_symbol_tables;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	73 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	74
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	75 if (m_file != NULL) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	76 fclose(m_file);
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	77 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	78
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	79 if (m_filepath != NULL) {
3302 2a3da7eaf4a6 7036747: 7017009 reappeared, problem with ElfStringTable zgu parents: 2022 diff changeset	80 os::free((void*)m_filepath);
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	81 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	82
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	83 if (m_next != NULL) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	84 delete m_next;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	85 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	86 };
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	87
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	88
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	89 //Check elf header to ensure the file is valid.
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	90 bool ElfFile::is_elf_file(Elf_Ehdr& hdr) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	91 return (ELFMAG0 == hdr.e_ident[EI_MAG0] &&
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	92 ELFMAG1 == hdr.e_ident[EI_MAG1] &&
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	93 ELFMAG2 == hdr.e_ident[EI_MAG2] &&
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	94 ELFMAG3 == hdr.e_ident[EI_MAG3] &&
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	95 ELFCLASSNONE != hdr.e_ident[EI_CLASS] &&
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	96 ELFDATANONE != hdr.e_ident[EI_DATA]);
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	97 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	98
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	99 bool ElfFile::load_tables() {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	100 assert(m_file, "file not open");
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	101 assert(!NullDecoder::is_error(m_status), "already in error");
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	102
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	103 // read elf file header
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	104 if (fread(&m_elfHdr, sizeof(m_elfHdr), 1, m_file) != 1) {
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	105 m_status = NullDecoder::file_invalid;
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	106 return false;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	107 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	108
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	109 if (!is_elf_file(m_elfHdr)) {
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	110 m_status = NullDecoder::file_invalid;
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	111 return false;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	112 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	113
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	114 // walk elf file's section headers, and load string tables
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	115 Elf_Shdr shdr;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	116 if (!fseek(m_file, m_elfHdr.e_shoff, SEEK_SET)) {
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	117 if (NullDecoder::is_error(m_status)) return false;
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	118
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	119 for (int index = 0; index < m_elfHdr.e_shnum; index ++) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	120 if (fread((void*)&shdr, sizeof(Elf_Shdr), 1, m_file) != 1) {
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	121 m_status = NullDecoder::file_invalid;
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	122 return false;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	123 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	124 if (shdr.sh_type == SHT_STRTAB) {
14441 e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	125 // string tables
3302 2a3da7eaf4a6 7036747: 7017009 reappeared, problem with ElfStringTable zgu parents: 2022 diff changeset	126 ElfStringTable* table = new (std::nothrow) ElfStringTable(m_file, shdr, index);
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	127 if (table == NULL) {
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	128 m_status = NullDecoder::out_of_memory;
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	129 return false;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	130 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	131 add_string_table(table);
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	132 } else if (shdr.sh_type == SHT_SYMTAB \|\| shdr.sh_type == SHT_DYNSYM) {
14441 e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	133 // symbol tables
3302 2a3da7eaf4a6 7036747: 7017009 reappeared, problem with ElfStringTable zgu parents: 2022 diff changeset	134 ElfSymbolTable* table = new (std::nothrow) ElfSymbolTable(m_file, shdr);
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	135 if (table == NULL) {
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	136 m_status = NullDecoder::out_of_memory;
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	137 return false;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	138 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	139 add_symbol_table(table);
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	140 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	141 }
14441 e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	142
17803 31e80afe3fed 8035647: PPC64: Support for elf v2 abi. goetz parents: 17795 diff changeset	143 #if defined(PPC64) && !defined(ABI_ELFv2)
14441 e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	144 // Now read the .opd section wich contains the PPC64 function descriptor table.
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	145 // The .opd section is only available on PPC64 (see for example:
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	146 // http://refspecs.linuxfoundation.org/LSB_3.1.1/LSB-Core-PPC64/LSB-Core-PPC64/specialsections.html)
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	147 // so this code should do no harm on other platforms but because of performance reasons we only
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	148 // execute it on PPC64 platforms.
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	149 // Notice that we can only find the .opd section after we have successfully read in the string
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	150 // tables in the previous loop, because we need to query the name of each section which is
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	151 // contained in one of the string tables (i.e. the one with the index m_elfHdr.e_shstrndx).
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	152
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	153 // Reset the file pointer
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	154 if (fseek(m_file, m_elfHdr.e_shoff, SEEK_SET)) {
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	155 m_status = NullDecoder::file_invalid;
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	156 return false;
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	157 }
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	158 for (int index = 0; index < m_elfHdr.e_shnum; index ++) {
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	159 if (fread((void*)&shdr, sizeof(Elf_Shdr), 1, m_file) != 1) {
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	160 m_status = NullDecoder::file_invalid;
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	161 return false;
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	162 }
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	163 if (m_elfHdr.e_shstrndx != SHN_UNDEF && shdr.sh_type == SHT_PROGBITS) {
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	164 ElfStringTable* string_table = get_string_table(m_elfHdr.e_shstrndx);
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	165 if (string_table == NULL) {
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	166 m_status = NullDecoder::file_invalid;
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	167 return false;
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	168 }
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	169 char buf[8]; // '8' is enough because we only want to read ".opd"
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	170 if (string_table->string_at(shdr.sh_name, buf, sizeof(buf)) && !strncmp(".opd", buf, 4)) {
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	171 m_funcDesc_table = new (std::nothrow) ElfFuncDescTable(m_file, shdr, index);
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	172 if (m_funcDesc_table == NULL) {
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	173 m_status = NullDecoder::out_of_memory;
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	174 return false;
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	175 }
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	176 break;
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	177 }
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	178 }
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	179 }
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	180 #endif
e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	181
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	182 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	183 return true;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	184 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	185
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	186 bool ElfFile::decode(address addr, char* buf, int buflen, int* offset) {
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	187 // something already went wrong, just give up
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	188 if (NullDecoder::is_error(m_status)) {
d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	189 return false;
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	190 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	191 ElfSymbolTable* symbol_table = m_symbol_tables;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	192 int string_table_index;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	193 int pos_in_string_table;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	194 int off = INT_MAX;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	195 bool found_symbol = false;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	196 while (symbol_table != NULL) {
14441 e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	197 if (symbol_table->lookup(addr, &string_table_index, &pos_in_string_table, &off, m_funcDesc_table)) {
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	198 found_symbol = true;
14441 e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	199 break;
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	200 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	201 symbol_table = symbol_table->m_next;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	202 }
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	203 if (!found_symbol) return false;
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	204
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	205 ElfStringTable* string_table = get_string_table(string_table_index);
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	206
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	207 if (string_table == NULL) {
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	208 m_status = NullDecoder::file_invalid;
d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	209 return false;
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	210 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	211 if (offset) *offset = off;
4803 d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	212
d7e3846464d0 7071311: Decoder enhancement zgu parents: 3960 diff changeset	213 return string_table->string_at(pos_in_string_table, buf, buflen);
2022 2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	214 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	215
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	216
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	217 void ElfFile::add_symbol_table(ElfSymbolTable* table) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	218 if (m_symbol_tables == NULL) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	219 m_symbol_tables = table;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	220 } else {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	221 table->m_next = m_symbol_tables;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	222 m_symbol_tables = table;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	223 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	224 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	225
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	226 void ElfFile::add_string_table(ElfStringTable* table) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	227 if (m_string_tables == NULL) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	228 m_string_tables = table;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	229 } else {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	230 table->m_next = m_string_tables;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	231 m_string_tables = table;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	232 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	233 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	234
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	235 ElfStringTable* ElfFile::get_string_table(int index) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	236 ElfStringTable* p = m_string_tables;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	237 while (p != NULL) {
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	238 if (p->index() == index) return p;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	239 p = p->m_next;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	240 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	241 return NULL;
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	242 }
2d4762ec74af 7003748: Decode C stack frames when symbols are presented (PhoneHome project) zgu parents: diff changeset	243
8710 9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	244 #ifdef LINUX
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	245 bool ElfFile::specifies_noexecstack() {
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	246 Elf_Phdr phdr;
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	247 if (!m_file) return true;
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	248
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	249 if (!fseek(m_file, m_elfHdr.e_phoff, SEEK_SET)) {
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	250 for (int index = 0; index < m_elfHdr.e_phnum; index ++) {
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	251 if (fread((void*)&phdr, sizeof(Elf_Phdr), 1, m_file) != 1) {
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	252 m_status = NullDecoder::file_invalid;
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	253 return false;
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	254 }
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	255 if (phdr.p_type == PT_GNU_STACK) {
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	256 if (phdr.p_flags == (PF_R \| PF_W)) {
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	257 return true;
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	258 } else {
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	259 return false;
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	260 }
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	261 }
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	262 }
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	263 }
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	264 return false;
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	265 }
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	266 #endif
9058789475af 7107135: Stack guard pages are no more protected after loading a shared library with executable stack iklam parents: 6842 diff changeset	267
14441 e7cbc95179c4 8019929: PPC64 (part 107): Extend ELF-decoder to support PPC64 function descriptor tables simonis parents: 8710 diff changeset	268 #endif // !_WINDOWS && !__APPLE__

Mercurial > hg > truffle

annotate src/share/vm/utilities/elfFile.cpp @ 20543:e7d0505c8a30