profile.h revision 55205
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 * $FreeBSD: head/sys/amd64/include/profile.h 55205 1999-12-29 04:46:21Z peter $ 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) ((uintfptr_t)(pc) - (uintfptr_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 uintfptr_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 = ((uintfptr_t *)frompc)[1]; \ 103 _mcount(frompc, selfpc); \ 104} 105 106typedef unsigned int uintfptr_t; 107 108#endif /* _KERNEL */ 109 110/* 111 * An unsigned integral type that can hold non-negative difference between 112 * function pointers. 113 */ 114typedef u_int fptrdiff_t; 115 116#ifdef _KERNEL 117 118void mcount __P((uintfptr_t frompc, uintfptr_t selfpc)); 119 120#ifdef GUPROF 121struct gmonparam; 122 123void nullfunc_loop_profiled __P((void)); 124void nullfunc_profiled __P((void)); 125void startguprof __P((struct gmonparam *p)); 126void stopguprof __P((struct gmonparam *p)); 127#else 128#define startguprof(p) 129#define stopguprof(p) 130#endif /* GUPROF */ 131 132#else /* !_KERNEL */ 133 134#include <sys/cdefs.h> 135 136__BEGIN_DECLS 137#ifdef __GNUC__ 138#ifdef __ELF__ 139void mcount __P((void)) __asm(".mcount"); 140#else 141void mcount __P((void)) __asm("mcount"); 142#endif 143#endif 144static void _mcount __P((uintfptr_t frompc, uintfptr_t selfpc)); 145__END_DECLS 146 147#endif /* _KERNEL */ 148 149#ifdef GUPROF 150/* XXX doesn't quite work outside kernel yet. */ 151extern int cputime_bias; 152 153__BEGIN_DECLS 154int cputime __P((void)); 155void empty_loop __P((void)); 156void mexitcount __P((uintfptr_t selfpc)); 157void nullfunc __P((void)); 158void nullfunc_loop __P((void)); 159__END_DECLS 160#endif 161 162#endif /* !_MACHINE_PROFILE_H_ */ 163