5c623cb649
- A nonprofiling version of s_lock (called s_lock_np) is used
by mcount.
- When profiling is active, more registers are clobbered in
seemingly simple assembly routines. This means that some
callers needed to save/restore extra registers.
- The stack pointer must have space for a 'fake' return address
in idle, to avoid stack underflow.
156 lines
4.8 KiB
C
156 lines
4.8 KiB
C
/*
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)profile.h 8.1 (Berkeley) 6/11/93
|
|
* $Id: profile.h,v 1.12 1997/08/30 08:07:50 fsmp Exp $
|
|
*/
|
|
|
|
#ifndef _MACHINE_PROFILE_H_
|
|
#define _MACHINE_PROFILE_H_
|
|
|
|
#ifdef KERNEL
|
|
/*
|
|
* Config generates something to tell the compiler to align functions on 16
|
|
* byte boundaries. A strict alignment is good for keeping the tables small.
|
|
*/
|
|
#define FUNCTION_ALIGNMENT 16
|
|
|
|
/*
|
|
* The kernel uses assembler stubs instead of unportable inlines.
|
|
* This is mainly to save a little time when profiling is not enabled,
|
|
* which is the usual case for the kernel.
|
|
*/
|
|
#define _MCOUNT_DECL void mcount
|
|
#define MCOUNT
|
|
|
|
#ifdef GUPROF
|
|
#define CALIB_SCALE 1000
|
|
#define KCOUNT(p,index) ((p)->kcount[(index) \
|
|
/ (HISTFRACTION * sizeof(HISTCOUNTER))])
|
|
#define MCOUNT_DECL(s)
|
|
#define MCOUNT_ENTER(s)
|
|
#define MCOUNT_EXIT(s)
|
|
#define PC_TO_I(p, pc) ((fptrint_t)(pc) - (fptrint_t)(p)->lowpc)
|
|
#else
|
|
#define MCOUNT_DECL(s) u_long s;
|
|
#ifdef SMP
|
|
#define MCOUNT_ENTER(s) { s = read_eflags(); \
|
|
__asm __volatile("cli" : : : "memory"); \
|
|
s_lock_np(&mcount_lock); }
|
|
#define MCOUNT_EXIT(s) { s_unlock_np(&mcount_lock); write_eflags(s); }
|
|
#else
|
|
#define MCOUNT_ENTER(s) { s = read_eflags(); disable_intr(); }
|
|
#define MCOUNT_EXIT(s) (write_eflags(s))
|
|
#endif
|
|
#endif /* GUPROF */
|
|
|
|
#else /* !KERNEL */
|
|
|
|
#define FUNCTION_ALIGNMENT 4
|
|
|
|
#define _MCOUNT_DECL static __inline void _mcount
|
|
|
|
#define MCOUNT \
|
|
void \
|
|
mcount() \
|
|
{ \
|
|
fptrint_t selfpc, frompc; \
|
|
/* \
|
|
* Find the return address for mcount, \
|
|
* and the return address for mcount's caller. \
|
|
* \
|
|
* selfpc = pc pushed by call to mcount \
|
|
*/ \
|
|
asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \
|
|
/* \
|
|
* frompc = pc pushed by call to mcount's caller. \
|
|
* The caller's stack frame has already been built, so %ebp is \
|
|
* the caller's frame pointer. The caller's raddr is in the \
|
|
* caller's frame following the caller's caller's frame pointer. \
|
|
*/ \
|
|
asm("movl (%%ebp),%0" : "=r" (frompc)); \
|
|
frompc = ((fptrint_t *)frompc)[1]; \
|
|
_mcount(frompc, selfpc); \
|
|
}
|
|
#endif /* KERNEL */
|
|
|
|
/* An unsigned integral type that can hold function pointers. */
|
|
typedef u_int fptrint_t;
|
|
|
|
/*
|
|
* An unsigned integral type that can hold non-negative difference between
|
|
* function pointers.
|
|
*/
|
|
typedef u_int fptrdiff_t;
|
|
|
|
#ifdef KERNEL
|
|
|
|
void mcount __P((fptrint_t frompc, fptrint_t selfpc));
|
|
|
|
#ifdef GUPROF
|
|
struct gmonparam;
|
|
|
|
void nullfunc_loop_profiled __P((void));
|
|
void nullfunc_profiled __P((void));
|
|
void startguprof __P((struct gmonparam *p));
|
|
void stopguprof __P((struct gmonparam *p));
|
|
#else
|
|
#define startguprof(p)
|
|
#define stopguprof(p)
|
|
#endif /* GUPROF */
|
|
|
|
#else /* !KERNEL */
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
__BEGIN_DECLS
|
|
void mcount __P((void)) __asm("mcount");
|
|
static void _mcount __P((fptrint_t frompc, fptrint_t selfpc));
|
|
__END_DECLS
|
|
|
|
#endif /* KERNEL */
|
|
|
|
#ifdef GUPROF
|
|
/* XXX doesn't quite work outside kernel yet. */
|
|
extern int cputime_bias;
|
|
|
|
__BEGIN_DECLS
|
|
int cputime __P((void));
|
|
void empty_loop __P((void));
|
|
void mexitcount __P((fptrint_t selfpc));
|
|
void nullfunc __P((void));
|
|
void nullfunc_loop __P((void));
|
|
__END_DECLS
|
|
#endif
|
|
|
|
#endif /* !_MACHINE_PROFILE_H_ */
|