profile.h revision 129408
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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)profile.h 8.1 (Berkeley) 6/11/93 30 * $FreeBSD: head/sys/amd64/include/profile.h 129408 2004-05-18 22:52:32Z peter $ 31 */ 32 33#ifndef _MACHINE_PROFILE_H_ 34#define _MACHINE_PROFILE_H_ 35 36#ifdef _KERNEL 37 38/* 39 * Config generates something to tell the compiler to align functions on 16 40 * byte boundaries. A strict alignment is good for keeping the tables small. 41 */ 42#define FUNCTION_ALIGNMENT 16 43 44/* 45 * The kernel uses assembler stubs instead of unportable inlines. 46 * This is mainly to save a little time when profiling is not enabled, 47 * which is the usual case for the kernel. 48 */ 49#define _MCOUNT_DECL void mcount 50#define MCOUNT 51 52#ifdef GUPROF 53#define CALIB_SCALE 1000 54#define KCOUNT(p,index) ((p)->kcount[(index) \ 55 / (HISTFRACTION * sizeof(HISTCOUNTER))]) 56#define MCOUNT_DECL(s) 57#define MCOUNT_ENTER(s) 58#define MCOUNT_EXIT(s) 59#define PC_TO_I(p, pc) ((uintfptr_t)(pc) - (uintfptr_t)(p)->lowpc) 60#else 61#define MCOUNT_DECL(s) u_long s; 62#ifdef SMP 63extern int mcount_lock; 64#define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); \ 65 while (!atomic_cmpset_acq_int(&mcount_lock, 0, 1)) \ 66 /* nothing */ ; } 67#define MCOUNT_EXIT(s) { atomic_store_rel_int(&mcount_lock, 0); \ 68 write_rflags(s); } 69#else 70#define MCOUNT_ENTER(s) { s = read_rflags(); disable_intr(); } 71#define MCOUNT_EXIT(s) (write_rflags(s)) 72#endif 73#endif /* GUPROF */ 74 75#else /* !_KERNEL */ 76 77#define FUNCTION_ALIGNMENT 4 78 79#define _MCOUNT_DECL \ 80static void _mcount(uintfptr_t frompc, uintfptr_t selfpc) __unused; \ 81static void _mcount 82 83#ifdef __GNUC__ 84#define MCOUNT __asm (" \n\ 85 .globl .mcount \n\ 86 .type .mcount @function \n\ 87.mcount: \n\ 88 pushq %rbp \n\ 89 movq %rsp, %rbp \n\ 90 pushq %rdi \n\ 91 pushq %rsi \n\ 92 pushq %rdx \n\ 93 pushq %rcx \n\ 94 pushq %r8 \n\ 95 pushq %r9 \n\ 96 movq 8(%rbp),%rsi \n\ 97 movq (%rbp),%rdi \n\ 98 movq 8(%rdi),%rdi \n\ 99 call _mcount \n\ 100 popq %r9 \n\ 101 popq %r8 \n\ 102 popq %rcx \n\ 103 popq %rdx \n\ 104 popq %rsi \n\ 105 popq %rdi \n\ 106 leave \n\ 107 ret \n\ 108 .size .mcount, . - .mcount"); 109#if 0 110/* 111 * We could use this, except it doesn't preserve the registers that were 112 * being passed with arguments to the function that we were inserted 113 * into. I've left it here as documentation of what the code above is 114 * supposed to do. 115 */ 116#define MCOUNT \ 117void \ 118mcount() \ 119{ \ 120 uintfptr_t selfpc, frompc; \ 121 /* \ 122 * Find the return address for mcount, \ 123 * and the return address for mcount's caller. \ 124 * \ 125 * selfpc = pc pushed by call to mcount \ 126 */ \ 127 __asm("movq 8(%%rbp),%0" : "=r" (selfpc)); \ 128 /* \ 129 * frompc = pc pushed by call to mcount's caller. \ 130 * The caller's stack frame has already been built, so %ebp is \ 131 * the caller's frame pointer. The caller's raddr is in the \ 132 * caller's frame following the caller's caller's frame pointer.\ 133 */ \ 134 __asm("movq (%%rbp),%0" : "=r" (frompc)); \ 135 frompc = ((uintfptr_t *)frompc)[1]; \ 136 _mcount(frompc, selfpc); \ 137} 138#endif 139#else /* __GNUC__ */ 140#define MCOUNT \ 141void \ 142mcount() \ 143{ \ 144} 145#endif /* __GNUC__ */ 146 147typedef unsigned long uintfptr_t; 148 149#endif /* _KERNEL */ 150 151/* 152 * An unsigned integral type that can hold non-negative difference between 153 * function pointers. 154 */ 155typedef u_int fptrdiff_t; 156 157#ifdef _KERNEL 158 159void mcount(uintfptr_t frompc, uintfptr_t selfpc); 160void kmupetext(uintfptr_t nhighpc); 161 162#ifdef GUPROF 163struct gmonparam; 164 165void nullfunc_loop_profiled(void); 166void nullfunc_profiled(void); 167void startguprof(struct gmonparam *p); 168void stopguprof(struct gmonparam *p); 169#else 170#define startguprof(p) 171#define stopguprof(p) 172#endif /* GUPROF */ 173 174#else /* !_KERNEL */ 175 176#include <sys/cdefs.h> 177 178__BEGIN_DECLS 179#ifdef __GNUC__ 180void mcount(void) __asm(".mcount"); 181#endif 182__END_DECLS 183 184#endif /* _KERNEL */ 185 186#ifdef GUPROF 187/* XXX doesn't quite work outside kernel yet. */ 188extern int cputime_bias; 189 190__BEGIN_DECLS 191int cputime(void); 192void empty_loop(void); 193void mexitcount(uintfptr_t selfpc); 194void nullfunc(void); 195void nullfunc_loop(void); 196__END_DECLS 197#endif 198 199#endif /* !_MACHINE_PROFILE_H_ */ 200