profile.h revision 37542
1/* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)profile.h 8.1 (Berkeley) 6/11/93 34 * $Id: profile.h,v 1.15 1998/07/10 02:27:15 bde Exp $ 35 */ 36 37#ifndef _MACHINE_PROFILE_H_ 38#define _MACHINE_PROFILE_H_ 39 40#ifdef KERNEL 41 42/* 43 * Config generates something to tell the compiler to align functions on 16 44 * byte boundaries. A strict alignment is good for keeping the tables small. 45 */ 46#define FUNCTION_ALIGNMENT 16 47 48/* 49 * The kernel uses assembler stubs instead of unportable inlines. 50 * This is mainly to save a little time when profiling is not enabled, 51 * which is the usual case for the kernel. 52 */ 53#define _MCOUNT_DECL void mcount 54#define MCOUNT 55 56#ifdef GUPROF 57#define CALIB_SCALE 1000 58#define KCOUNT(p,index) ((p)->kcount[(index) \ 59 / (HISTFRACTION * sizeof(HISTCOUNTER))]) 60#define MCOUNT_DECL(s) 61#define MCOUNT_ENTER(s) 62#define MCOUNT_EXIT(s) 63#define PC_TO_I(p, pc) ((fptrint_t)(pc) - (fptrint_t)(p)->lowpc) 64#else 65#define MCOUNT_DECL(s) u_long s; 66#ifdef SMP 67#define MCOUNT_ENTER(s) { s = read_eflags(); \ 68 __asm __volatile("cli" : : : "memory"); \ 69 s_lock_np(&mcount_lock); } 70#define MCOUNT_EXIT(s) { s_unlock_np(&mcount_lock); write_eflags(s); } 71#else 72#define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); } 73#define MCOUNT_EXIT(s) (write_eflags(s)) 74#endif 75#endif /* GUPROF */ 76 77#else /* !KERNEL */ 78 79#define FUNCTION_ALIGNMENT 4 80 81#define _MCOUNT_DECL static __inline void _mcount 82 83#define MCOUNT \ 84void \ 85mcount() \ 86{ \ 87 fptrint_t selfpc, frompc; \ 88 /* \ 89 * Find the return address for mcount, \ 90 * and the return address for mcount's caller. \ 91 * \ 92 * selfpc = pc pushed by call to mcount \ 93 */ \ 94 asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \ 95 /* \ 96 * frompc = pc pushed by call to mcount's caller. \ 97 * The caller's stack frame has already been built, so %ebp is \ 98 * the caller's frame pointer. The caller's raddr is in the \ 99 * caller's frame following the caller's caller's frame pointer. \ 100 */ \ 101 asm("movl (%%ebp),%0" : "=r" (frompc)); \ 102 frompc = ((fptrint_t *)frompc)[1]; \ 103 _mcount(frompc, selfpc); \ 104} 105 106/* An unsigned integral type that can hold function pointers. */ 107typedef u_int32_t fptrint_t; 108 109#endif /* KERNEL */ 110 111/* 112 * An unsigned integral type that can hold non-negative difference between 113 * function pointers. 114 */ 115typedef u_int fptrdiff_t; 116 117#ifdef KERNEL 118 119void mcount __P((fptrint_t frompc, fptrint_t selfpc)); 120 121#ifdef GUPROF 122struct gmonparam; 123 124void nullfunc_loop_profiled __P((void)); 125void nullfunc_profiled __P((void)); 126void startguprof __P((struct gmonparam *p)); 127void stopguprof __P((struct gmonparam *p)); 128#else 129#define startguprof(p) 130#define stopguprof(p) 131#endif /* GUPROF */ 132 133#else /* !KERNEL */ 134 135#include <sys/cdefs.h> 136 137__BEGIN_DECLS 138#ifdef __GNUC__ 139void mcount __P((void)) __asm("mcount"); 140#endif 141static void _mcount __P((fptrint_t frompc, fptrint_t selfpc)); 142__END_DECLS 143 144#endif /* KERNEL */ 145 146#ifdef GUPROF 147/* XXX doesn't quite work outside kernel yet. */ 148extern int cputime_bias; 149 150__BEGIN_DECLS 151int cputime __P((void)); 152void empty_loop __P((void)); 153void mexitcount __P((fptrint_t selfpc)); 154void nullfunc __P((void)); 155void nullfunc_loop __P((void)); 156__END_DECLS 157#endif 158 159#endif /* !_MACHINE_PROFILE_H_ */ 160