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

 /*

  * 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.

  *

  */

 // Loadlib_aix.cpp contains support code for analysing the memory

 // layout of loaded binaries in ones own process space.

 //

 // It is needed, among other things, to provide a  dladdr() emulation, because

 // that one is not provided by AIX

 #ifndef OS_AIX_VM_LOADLIB_AIX_HPP

 #define OS_AIX_VM_LOADLIB_AIX_HPP

 class outputStream;

 // This class holds information about a single loaded library module.

 // Note that on AIX, a single library can be spread over multiple

 // uintptr_t range on a module base, eg.

 // libC.a(shr3_64.o) or libC.a(shrcore_64.o).

 class LoadedLibraryModule {

     friend class LoadedLibraries;

     char fullpath[512];  // eg /usr/lib/libC.a

     char shortname[30];  // eg libC.a

     char membername[30]; // eg shrcore_64.o

     const unsigned char* text_from;

     const unsigned char* text_to;

     const unsigned char* data_from;

     const unsigned char* data_to;

   public:

     const char* get_fullpath() const {

       return fullpath;

     }

     const char* get_shortname() const {

       return shortname;

     }

     const char* get_membername() const {

       return membername;

     }

     // text_from, text_to: returns the range of the text (code)

     // segment for that module

     const unsigned char* get_text_from() const {

       return text_from;

     }

     const unsigned char* get_text_to() const {

       return text_to;

     }

     // data_from/data_to: returns the range of the data

     // segment for that module

     const unsigned char* get_data_from() const {

       return data_from;

     }

     const unsigned char* get_data_to() const {

       return data_to;

     }

     // returns true if the

     bool is_in_text(const unsigned char* p) const {

       return p >= text_from && p < text_to ? true : false;

     }

     bool is_in_data(const unsigned char* p) const {

       return p >= data_from && p < data_to ? true : false;

     }

     // output debug info

     void print(outputStream* os) const;

 }; // end LoadedLibraryModule

 // This class is a singleton holding a map of all loaded binaries

 // in the AIX process space.

 class LoadedLibraries

 // : AllStatic (including allocation.hpp just for AllStatic is overkill.)

 {

   private:

     enum {MAX_MODULES = 100};

     static LoadedLibraryModule tab[MAX_MODULES];

     static int num_loaded;

   public:

     // rebuild the internal table of LoadedLibraryModule objects

     static void reload();

     // checks whether the address p points to any of the loaded code segments.

     // If it does, returns the LoadedLibraryModule entry. If not, returns NULL.

     static const LoadedLibraryModule* find_for_text_address(const  unsigned char* p);

     // checks whether the address p points to any of the loaded data segments.

     // If it does, returns the LoadedLibraryModule entry. If not, returns NULL.

     static const LoadedLibraryModule* find_for_data_address(const  unsigned char* p);

     // output debug info

     static void print(outputStream* os);

 }; // end LoadedLibraries

 #endif // OS_AIX_VM_LOADLIB_AIX_HPP