xref: /titanic_50/usr/src/tools/ctf/common/ctf_headers.h (revision f3e7f55e73a39377d55a030f124cc86b3b66a9cc)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 * Copyright 2018 Joyent, Inc.
 */

#ifndef _CTF_HEADERS_H
#define	_CTF_HEADERS_H

/*
 * Because the ON tools are executed on the system where they are built,
 * the tools need to include the headers installed on the build system,
 * rather than those in the ON source tree. However, some of the headers
 * required by the tools are part of the ON source tree, but not delivered
 * as part of illumos.  These include the following:
 *
 * $(SRC)/lib/libctf/common/libctf.h
 * $(SRC)/lib/libctf/common/libctf_impl.h
 * $(SRC)/uts/common/sys/ctf_api.h
 * $(SRC)/uts/common/sys/ctf.h
 *
 * These headers get installed in the proto area in the build environment
 * under $(ROOT)/usr/include and $(ROOT)/usr/include/sys. Though these
 * headers are not part of the release, in releases including and prior to
 * Solaris 9, they did get installed on the build system via bfu. Therefore,
 * we can not simply force the order of inclusion with -I/usr/include first
 * in Makefile.ctf because we might actually get downlevel versions of the
 * ctf headers. Depending on the order of the -I includes, we can also have
 * a problem with mismatched headers when building the ctf tools with some
 * headers getting pulled in from /usr/include and others from
 * $(SRC)/uts/common/sys.
 *
 * To address the problem, we have done two things:
 * 1) Created this header with a specific order of inclusion for the
 *    ctf headers.  Because the <libctf.h> header includes <sys/ctf_api.h>
 *    which in turn includes <sys/ctf.h> we need to include these in
 *    reverse order to guarantee that we get the correct versions of
 *    the headers.
 * 2) In $(SRC)/tools/ctf/Makefile.ctf, we order the -I includes such
 *    that we first search the directories where the ctf headers
 *    live, followed by /usr/include, followed by $(SRC)/uts/common.
 *    This last -I include is needed in order to prevent a build failure
 *    when <sys/ctf_api.h> is included via a nested #include rather than
 *    an explicit path #include.
 *
 * We'll also include the local ccompile.h - older build systems often lack
 * useful definitions like __unused.  Finally, we'll also define ARRAY_SIZE:
 * unfortunately, older systems sysmacros.h only have this defined for the
 * kernel, and we can't easily pick it up otherwise.
 */

#include <uts/common/sys/ccompile.h>
#include <uts/common/sys/ctf.h>
#include <uts/common/sys/ctf_api.h>
#include <common/ctf/ctf_impl.h>
#include <lib/libctf/common/libctf.h>
#include <lib/libctf/common/libctf_impl.h>

#if !defined(ARRAY_SIZE)
#define	ARRAY_SIZE(x)	(sizeof (x) / sizeof (x[0]))
#endif

#endif /* _CTF_HEADERS_H */