Mercurial > hg > truffle
diff src/os/aix/vm/loadlib_aix.hpp @ 14415:666e6ce3976c
8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
Reviewed-by: kvn
author | simonis |
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date | Fri, 06 Sep 2013 20:16:09 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/os/aix/vm/loadlib_aix.hpp Fri Sep 06 20:16:09 2013 +0200 @@ -0,0 +1,128 @@ +/* + * 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