jdk8-mips64-public/hotspot: src/share/vm/utilities/elfStringTable.cpp@a5d6f0c3585f

8014262: PrintStringTableStatistics should include more footprint info
Summary: Added info for the string/symbol objects and the hash entries
Reviewed-by: coleenp, rbackman

     1 /*

     2  * Copyright (c) 1997, 2012, 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  */

    25 #include "precompiled.hpp"

    27 #if !defined(_WINDOWS) && !defined(__APPLE__)

    29 #include "memory/allocation.inline.hpp"

    30 #include "runtime/os.hpp"

    31 #include "utilities/elfStringTable.hpp"

    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;

    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 }

    60 ElfStringTable::~ElfStringTable() {

    61   if (m_table != NULL) {

    62     os::free((void*)m_table);

    63   }

    65   if (m_next != NULL) {

    66     delete m_next;

    67   }

    68 }

    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 }

    90 #endif // _WINDOWS

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/utilities/elfStringTable.cpp@a5d6f0c3585f

src/share/vm/utilities/elfStringTable.cpp