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src/os/aix/vm/loadlib_aix.hpp@f90c822e73f8 (annotated)

src/os/aix/vm/loadlib_aix.hpp

Wed, 27 Apr 2016 01:25:04 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:25:04 +0800

changeset 0

f90c822e73f8

permissions

-rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

aoqi@0	1	/*
aoqi@0	2	* Copyright 2012, 2013 SAP AG. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25
aoqi@0	26	// Loadlib_aix.cpp contains support code for analysing the memory
aoqi@0	27	// layout of loaded binaries in ones own process space.
aoqi@0	28	//
aoqi@0	29	// It is needed, among other things, to provide a dladdr() emulation, because
aoqi@0	30	// that one is not provided by AIX
aoqi@0	31
aoqi@0	32	#ifndef OS_AIX_VM_LOADLIB_AIX_HPP
aoqi@0	33	#define OS_AIX_VM_LOADLIB_AIX_HPP
aoqi@0	34
aoqi@0	35	class outputStream;
aoqi@0	36
aoqi@0	37	// This class holds information about a single loaded library module.
aoqi@0	38	// Note that on AIX, a single library can be spread over multiple
aoqi@0	39	// uintptr_t range on a module base, eg.
aoqi@0	40	// libC.a(shr3_64.o) or libC.a(shrcore_64.o).
aoqi@0	41	class LoadedLibraryModule {
aoqi@0	42
aoqi@0	43	friend class LoadedLibraries;
aoqi@0	44
aoqi@0	45	char fullpath[512]; // eg /usr/lib/libC.a
aoqi@0	46	char shortname[30]; // eg libC.a
aoqi@0	47	char membername[30]; // eg shrcore_64.o
aoqi@0	48	const unsigned char* text_from;
aoqi@0	49	const unsigned char* text_to;
aoqi@0	50	const unsigned char* data_from;
aoqi@0	51	const unsigned char* data_to;
aoqi@0	52
aoqi@0	53	public:
aoqi@0	54
aoqi@0	55	const char* get_fullpath() const {
aoqi@0	56	return fullpath;
aoqi@0	57	}
aoqi@0	58	const char* get_shortname() const {
aoqi@0	59	return shortname;
aoqi@0	60	}
aoqi@0	61	const char* get_membername() const {
aoqi@0	62	return membername;
aoqi@0	63	}
aoqi@0	64
aoqi@0	65	// text_from, text_to: returns the range of the text (code)
aoqi@0	66	// segment for that module
aoqi@0	67	const unsigned char* get_text_from() const {
aoqi@0	68	return text_from;
aoqi@0	69	}
aoqi@0	70	const unsigned char* get_text_to() const {
aoqi@0	71	return text_to;
aoqi@0	72	}
aoqi@0	73
aoqi@0	74	// data_from/data_to: returns the range of the data
aoqi@0	75	// segment for that module
aoqi@0	76	const unsigned char* get_data_from() const {
aoqi@0	77	return data_from;
aoqi@0	78	}
aoqi@0	79	const unsigned char* get_data_to() const {
aoqi@0	80	return data_to;
aoqi@0	81	}
aoqi@0	82
aoqi@0	83	// returns true if the
aoqi@0	84	bool is_in_text(const unsigned char* p) const {
aoqi@0	85	return p >= text_from && p < text_to ? true : false;
aoqi@0	86	}
aoqi@0	87
aoqi@0	88	bool is_in_data(const unsigned char* p) const {
aoqi@0	89	return p >= data_from && p < data_to ? true : false;
aoqi@0	90	}
aoqi@0	91
aoqi@0	92	// output debug info
aoqi@0	93	void print(outputStream* os) const;
aoqi@0	94
aoqi@0	95	}; // end LoadedLibraryModule
aoqi@0	96
aoqi@0	97	// This class is a singleton holding a map of all loaded binaries
aoqi@0	98	// in the AIX process space.
aoqi@0	99	class LoadedLibraries
aoqi@0	100	// : AllStatic (including allocation.hpp just for AllStatic is overkill.)
aoqi@0	101	{
aoqi@0	102
aoqi@0	103	private:
aoqi@0	104
aoqi@0	105	enum {MAX_MODULES = 100};
aoqi@0	106	static LoadedLibraryModule tab[MAX_MODULES];
aoqi@0	107	static int num_loaded;
aoqi@0	108
aoqi@0	109	public:
aoqi@0	110
aoqi@0	111	// rebuild the internal table of LoadedLibraryModule objects
aoqi@0	112	static void reload();
aoqi@0	113
aoqi@0	114	// checks whether the address p points to any of the loaded code segments.
aoqi@0	115	// If it does, returns the LoadedLibraryModule entry. If not, returns NULL.
aoqi@0	116	static const LoadedLibraryModule* find_for_text_address(const unsigned char* p);
aoqi@0	117
aoqi@0	118	// checks whether the address p points to any of the loaded data segments.
aoqi@0	119	// If it does, returns the LoadedLibraryModule entry. If not, returns NULL.
aoqi@0	120	static const LoadedLibraryModule* find_for_data_address(const unsigned char* p);
aoqi@0	121
aoqi@0	122	// output debug info
aoqi@0	123	static void print(outputStream* os);
aoqi@0	124
aoqi@0	125	}; // end LoadedLibraries
aoqi@0	126
aoqi@0	127
aoqi@0	128	#endif // OS_AIX_VM_LOADLIB_AIX_HPP