129 lines
3.9 KiB
C++
129 lines
3.9 KiB
C++
/*
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* Copyright 2012, 2013 SAP AG. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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// Loadlib_aix.cpp contains support code for analysing the memory
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// layout of loaded binaries in ones own process space.
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//
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// It is needed, among other things, to provide a dladdr() emulation, because
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// that one is not provided by AIX
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#ifndef OS_AIX_VM_LOADLIB_AIX_HPP
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#define OS_AIX_VM_LOADLIB_AIX_HPP
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class outputStream;
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// This class holds information about a single loaded library module.
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// Note that on AIX, a single library can be spread over multiple
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// uintptr_t range on a module base, eg.
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// libC.a(shr3_64.o) or libC.a(shrcore_64.o).
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class LoadedLibraryModule {
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friend class LoadedLibraries;
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char fullpath[512]; // eg /usr/lib/libC.a
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char shortname[30]; // eg libC.a
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char membername[30]; // eg shrcore_64.o
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const unsigned char* text_from;
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const unsigned char* text_to;
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const unsigned char* data_from;
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const unsigned char* data_to;
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public:
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const char* get_fullpath() const {
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return fullpath;
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}
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const char* get_shortname() const {
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return shortname;
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}
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const char* get_membername() const {
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return membername;
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}
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// text_from, text_to: returns the range of the text (code)
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// segment for that module
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const unsigned char* get_text_from() const {
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return text_from;
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}
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const unsigned char* get_text_to() const {
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return text_to;
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}
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// data_from/data_to: returns the range of the data
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// segment for that module
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const unsigned char* get_data_from() const {
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return data_from;
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}
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const unsigned char* get_data_to() const {
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return data_to;
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}
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// returns true if the
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bool is_in_text(const unsigned char* p) const {
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return p >= text_from && p < text_to ? true : false;
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}
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bool is_in_data(const unsigned char* p) const {
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return p >= data_from && p < data_to ? true : false;
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}
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// output debug info
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void print(outputStream* os) const;
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}; // end LoadedLibraryModule
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// This class is a singleton holding a map of all loaded binaries
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// in the AIX process space.
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class LoadedLibraries
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// : AllStatic (including allocation.hpp just for AllStatic is overkill.)
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{
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private:
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enum {MAX_MODULES = 100};
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static LoadedLibraryModule tab[MAX_MODULES];
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static int num_loaded;
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public:
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// rebuild the internal table of LoadedLibraryModule objects
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static void reload();
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// checks whether the address p points to any of the loaded code segments.
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// If it does, returns the LoadedLibraryModule entry. If not, returns NULL.
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static const LoadedLibraryModule* find_for_text_address(const unsigned char* p);
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// checks whether the address p points to any of the loaded data segments.
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// If it does, returns the LoadedLibraryModule entry. If not, returns NULL.
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static const LoadedLibraryModule* find_for_data_address(const unsigned char* p);
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// output debug info
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static void print(outputStream* os);
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}; // end LoadedLibraries
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#endif // OS_AIX_VM_LOADLIB_AIX_HPP
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