profile.h revision 114349
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 114349 2003-05-01 01:05:25Z 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 67extern int mcount_lock; 68#define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); \ 69 while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \ 70 /* nothing */ ; } 71#define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \ 72 write_rflags(s); } 73#else 74#define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); } 75#define MCOUNT_EXIT(s) (write_rflags(s)) 76#endif 77#endif /* GUPROF */ 78 79#else /* !_KERNEL */ 80 81#define FUNCTION_ALIGNMENT 4 82 83#define _MCOUNT_DECL static __inline void _mcount 84 85#ifdef __GNUC__ 86#define MCOUNT \ 87void \ 88mcount() \ 89{ \ 90 uintfptr_t selfpc, frompc; \ 91 /* \ 92 * Find the return address for mcount, \ 93 * and the return address for mcount's caller. \ 94 * \ 95 * selfpc = pc pushed by call to mcount \ 96 */ \ 97 asm("movq 8(%%rbp),%0" : "=r" (selfpc)); \ 98 /* \ 99 * frompc = pc pushed by call to mcount's caller. \ 100 * The caller's stack frame has already been built, so %ebp is \ 101 * the caller's frame pointer. The caller's raddr is in the \ 102 * caller's frame following the caller's caller's frame pointer.\ 103 */ \ 104 asm("movq (%%rbp),%0" : "=r" (frompc)); \ 105 frompc = ((uintfptr_t *)frompc)[1]; \ 106 _mcount(frompc, selfpc); \ 107} 108#else /* __GNUC__ */ 109#define MCOUNT \ 110void \ 111mcount() \ 112{ \ 113} 114#endif /* __GNUC__ */ 115 116typedef unsigned long uintfptr_t; 117 118#endif /* _KERNEL */ 119 120/* 121 * An unsigned integral type that can hold non-negative difference between 122 * function pointers. 123 */ 124typedef u_int fptrdiff_t; 125 126#ifdef _KERNEL 127 128void mcount(uintfptr_t frompc, uintfptr_t selfpc); 129void kmupetext(uintfptr_t nhighpc); 130 131#ifdef GUPROF 132struct gmonparam; 133 134void nullfunc_loop_profiled(void); 135void nullfunc_profiled(void); 136void startguprof(struct gmonparam *p); 137void stopguprof(struct gmonparam *p); 138#else 139#define startguprof(p) 140#define stopguprof(p) 141#endif /* GUPROF */ 142 143#else /* !_KERNEL */ 144 145#include <sys/cdefs.h> 146 147__BEGIN_DECLS 148#ifdef __GNUC__ 149void mcount(void) __asm(".mcount"); 150#endif 151static void _mcount(uintfptr_t frompc, uintfptr_t selfpc); 152__END_DECLS 153 154#endif /* _KERNEL */ 155 156#ifdef GUPROF 157/* XXX doesn't quite work outside kernel yet. */ 158extern int cputime_bias; 159 160__BEGIN_DECLS 161int cputime(void); 162void empty_loop(void); 163void mexitcount(uintfptr_t selfpc); 164void nullfunc(void); 165void nullfunc_loop(void); 166__END_DECLS 167#endif 168 169#endif /* !_MACHINE_PROFILE_H_ */ 170