/*

 * Copyright (c) 2012, 2013 SAP SE. 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

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 */

// 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 dladdr(3), which is

// missing on AIX.

#include <stddef.h>

class outputStream;

// Struct holds information about a single loaded library module.

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

// uintptr_t ranges on a module base, eg.

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

// Note: all pointers to strings (path, member) point to strings which are immortal.

struct loaded_module_t {

  // Points to the full path of the lodaed module, e.g.

  // "/usr/lib/libC.a".

  const char* path;

  // Host library name without path

  const char* shortname;

  // Points to the object file (AIX specific stuff)

  // e.g "shrcore_64.o".

  const char* member;

  // Text area from, to

  const void* text;

  size_t text_len;

  // Data area from, to

  const void* data;

  size_t data_len;

  // True if this module is part of the vm.

  bool is_in_vm;

};

// 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.)

{

  public:

    // Rebuild the internal module table. If an error occurs, internal module

    // table remains untouched.

    static bool reload();

    // Check whether the given address points into the text segment of a

    // loaded module. Return true if this is the case.

    // Optionally, information about the module is returned (info)

    static bool find_for_text_address (

      const void* p,

      loaded_module_t* info // Optional, leave NULL if not needed.

    );

    // Check whether the given address points into the data segment of a

    // loaded module. Return true if this is the case.

    // Optionally, information about the module is returned (info)

    static bool find_for_data_address (

      const void* p,

      loaded_module_t* info // Optional, leave NULL if not needed.

    );

    // Output debug info

    static void print(outputStream* os);

};