Copied mcount.c from the library again. #include'ing it via a relative
path to a possibly-nonexistent place didn't work well enough. Sigh.
This commit is contained in:
parent
bb369b53b2
commit
1ae38af2be
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=13116
@ -1,4 +1,326 @@
|
||||
#define GPROF4 1 /* XXX can't get at kernel options */
|
||||
#define GUPROF 1 /* XXX can't get at kernel options */
|
||||
/*-
|
||||
* Copyright (c) 1983, 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.
|
||||
*/
|
||||
|
||||
#include "../lib/libc/gmon/mcount.c" /* XXX */
|
||||
#if !defined(lint) && !defined(KERNEL) && defined(LIBC_SCCS)
|
||||
#if 0
|
||||
static char sccsid[] = "@(#)mcount.c 8.1 (Berkeley) 6/4/93";
|
||||
#endif
|
||||
static const char rcsid[] =
|
||||
"$Id$";
|
||||
#endif
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/gmon.h>
|
||||
#ifdef KERNEL
|
||||
#include <sys/systm.h>
|
||||
#include <vm/vm.h>
|
||||
#include <vm/vm_param.h>
|
||||
#include <vm/pmap.h>
|
||||
void bintr __P((void));
|
||||
void btrap __P((void));
|
||||
void eintr __P((void));
|
||||
void user __P((void));
|
||||
#endif
|
||||
|
||||
/*
|
||||
* mcount is called on entry to each function compiled with the profiling
|
||||
* switch set. _mcount(), which is declared in a machine-dependent way
|
||||
* with _MCOUNT_DECL, does the actual work and is either inlined into a
|
||||
* C routine or called by an assembly stub. In any case, this magic is
|
||||
* taken care of by the MCOUNT definition in <machine/profile.h>.
|
||||
*
|
||||
* _mcount updates data structures that represent traversals of the
|
||||
* program's call graph edges. frompc and selfpc are the return
|
||||
* address and function address that represents the given call graph edge.
|
||||
*
|
||||
* Note: the original BSD code used the same variable (frompcindex) for
|
||||
* both frompcindex and frompc. Any reasonable, modern compiler will
|
||||
* perform this optimization.
|
||||
*/
|
||||
_MCOUNT_DECL(frompc, selfpc) /* _mcount; may be static, inline, etc */
|
||||
register fptrint_t frompc, selfpc;
|
||||
{
|
||||
#ifdef GUPROF
|
||||
u_int delta;
|
||||
#endif
|
||||
register fptrdiff_t frompci;
|
||||
register u_short *frompcindex;
|
||||
register struct tostruct *top, *prevtop;
|
||||
register struct gmonparam *p;
|
||||
register long toindex;
|
||||
#ifdef KERNEL
|
||||
register int s; /* XXX */
|
||||
u_long save_eflags; /* XXX */
|
||||
#endif
|
||||
|
||||
p = &_gmonparam;
|
||||
#ifndef GUPROF /* XXX */
|
||||
/*
|
||||
* check that we are profiling
|
||||
* and that we aren't recursively invoked.
|
||||
*/
|
||||
if (p->state != GMON_PROF_ON)
|
||||
return;
|
||||
#endif
|
||||
#ifdef KERNEL
|
||||
MCOUNT_ENTER;
|
||||
#else
|
||||
p->state = GMON_PROF_BUSY;
|
||||
#endif
|
||||
frompci = frompc - p->lowpc;
|
||||
|
||||
#ifdef KERNEL
|
||||
/*
|
||||
* When we are called from an exception handler, frompci may be
|
||||
* for a user address. Convert such frompci's to the index of
|
||||
* user() to merge all user counts.
|
||||
*/
|
||||
if (frompci >= p->textsize) {
|
||||
if (frompci + p->lowpc
|
||||
>= (fptrint_t)(VM_MAXUSER_ADDRESS + UPAGES * NBPG))
|
||||
goto done;
|
||||
frompci = (fptrint_t)user - p->lowpc;
|
||||
if (frompci >= p->textsize)
|
||||
goto done;
|
||||
}
|
||||
#endif /* KERNEL */
|
||||
|
||||
#ifdef GUPROF
|
||||
if (p->state != GMON_PROF_HIRES)
|
||||
goto skip_guprof_stuff;
|
||||
/*
|
||||
* Look at the clock and add the count of clock cycles since the
|
||||
* clock was last looked at to a counter for frompc. This
|
||||
* solidifies the count for the function containing frompc and
|
||||
* effectively starts another clock for the current function.
|
||||
* The count for the new clock will be solidified when another
|
||||
* function call is made or the function returns.
|
||||
*
|
||||
* We use the usual sampling counters since they can be located
|
||||
* efficiently. 4-byte counters are usually necessary.
|
||||
*
|
||||
* There are many complications for subtracting the profiling
|
||||
* overheads from the counts for normal functions and adding
|
||||
* them to the counts for mcount(), mexitcount() and cputime().
|
||||
* We attempt to handle fractional cycles, but the overheads
|
||||
* are usually underestimated because they are calibrated for
|
||||
* a simpler than usual setup.
|
||||
*/
|
||||
delta = cputime() - p->mcount_overhead;
|
||||
p->cputime_overhead_resid += p->cputime_overhead_frac;
|
||||
p->mcount_overhead_resid += p->mcount_overhead_frac;
|
||||
if ((int)delta < 0)
|
||||
*p->mcount_count += delta + p->mcount_overhead
|
||||
- p->cputime_overhead;
|
||||
else if (delta != 0) {
|
||||
if (p->cputime_overhead_resid >= CALIB_SCALE) {
|
||||
p->cputime_overhead_resid -= CALIB_SCALE;
|
||||
++*p->cputime_count;
|
||||
--delta;
|
||||
}
|
||||
if (delta != 0) {
|
||||
if (p->mcount_overhead_resid >= CALIB_SCALE) {
|
||||
p->mcount_overhead_resid -= CALIB_SCALE;
|
||||
++*p->mcount_count;
|
||||
--delta;
|
||||
}
|
||||
KCOUNT(p, frompci) += delta;
|
||||
}
|
||||
*p->mcount_count += p->mcount_overhead_sub;
|
||||
}
|
||||
*p->cputime_count += p->cputime_overhead;
|
||||
skip_guprof_stuff:
|
||||
#endif /* GUPROF */
|
||||
|
||||
#ifdef KERNEL
|
||||
/*
|
||||
* When we are called from an exception handler, frompc is faked
|
||||
* to be for where the exception occurred. We've just solidified
|
||||
* the count for there. Now convert frompci to the index of btrap()
|
||||
* for trap handlers and bintr() for interrupt handlers to make
|
||||
* exceptions appear in the call graph as calls from btrap() and
|
||||
* bintr() instead of calls from all over.
|
||||
*/
|
||||
if ((fptrint_t)selfpc >= (fptrint_t)btrap
|
||||
&& (fptrint_t)selfpc < (fptrint_t)eintr) {
|
||||
if ((fptrint_t)selfpc >= (fptrint_t)bintr)
|
||||
frompci = (fptrint_t)bintr - p->lowpc;
|
||||
else
|
||||
frompci = (fptrint_t)btrap - p->lowpc;
|
||||
}
|
||||
#endif /* KERNEL */
|
||||
|
||||
/*
|
||||
* check that frompc is a reasonable pc value.
|
||||
* for example: signal catchers get called from the stack,
|
||||
* not from text space. too bad.
|
||||
*/
|
||||
if (frompci >= p->textsize)
|
||||
goto done;
|
||||
|
||||
frompcindex = &p->froms[frompci / (p->hashfraction * sizeof(*p->froms))];
|
||||
toindex = *frompcindex;
|
||||
if (toindex == 0) {
|
||||
/*
|
||||
* first time traversing this arc
|
||||
*/
|
||||
toindex = ++p->tos[0].link;
|
||||
if (toindex >= p->tolimit)
|
||||
/* halt further profiling */
|
||||
goto overflow;
|
||||
|
||||
*frompcindex = toindex;
|
||||
top = &p->tos[toindex];
|
||||
top->selfpc = selfpc;
|
||||
top->count = 1;
|
||||
top->link = 0;
|
||||
goto done;
|
||||
}
|
||||
top = &p->tos[toindex];
|
||||
if (top->selfpc == selfpc) {
|
||||
/*
|
||||
* arc at front of chain; usual case.
|
||||
*/
|
||||
top->count++;
|
||||
goto done;
|
||||
}
|
||||
/*
|
||||
* have to go looking down chain for it.
|
||||
* top points to what we are looking at,
|
||||
* prevtop points to previous top.
|
||||
* we know it is not at the head of the chain.
|
||||
*/
|
||||
for (; /* goto done */; ) {
|
||||
if (top->link == 0) {
|
||||
/*
|
||||
* top is end of the chain and none of the chain
|
||||
* had top->selfpc == selfpc.
|
||||
* so we allocate a new tostruct
|
||||
* and link it to the head of the chain.
|
||||
*/
|
||||
toindex = ++p->tos[0].link;
|
||||
if (toindex >= p->tolimit)
|
||||
goto overflow;
|
||||
|
||||
top = &p->tos[toindex];
|
||||
top->selfpc = selfpc;
|
||||
top->count = 1;
|
||||
top->link = *frompcindex;
|
||||
*frompcindex = toindex;
|
||||
goto done;
|
||||
}
|
||||
/*
|
||||
* otherwise, check the next arc on the chain.
|
||||
*/
|
||||
prevtop = top;
|
||||
top = &p->tos[top->link];
|
||||
if (top->selfpc == selfpc) {
|
||||
/*
|
||||
* there it is.
|
||||
* increment its count
|
||||
* move it to the head of the chain.
|
||||
*/
|
||||
top->count++;
|
||||
toindex = prevtop->link;
|
||||
prevtop->link = top->link;
|
||||
top->link = *frompcindex;
|
||||
*frompcindex = toindex;
|
||||
goto done;
|
||||
}
|
||||
|
||||
}
|
||||
done:
|
||||
#ifdef KERNEL
|
||||
MCOUNT_EXIT;
|
||||
#else
|
||||
p->state = GMON_PROF_ON;
|
||||
#endif
|
||||
return;
|
||||
overflow:
|
||||
p->state = GMON_PROF_ERROR;
|
||||
#ifdef KERNEL
|
||||
MCOUNT_EXIT;
|
||||
#endif
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* Actual definition of mcount function. Defined in <machine/profile.h>,
|
||||
* which is included by <sys/gmon.h>.
|
||||
*/
|
||||
MCOUNT
|
||||
|
||||
#ifdef GUPROF
|
||||
void
|
||||
mexitcount(selfpc)
|
||||
fptrint_t selfpc;
|
||||
{
|
||||
struct gmonparam *p;
|
||||
fptrint_t selfpcdiff;
|
||||
|
||||
p = &_gmonparam;
|
||||
selfpcdiff = selfpc - (fptrint_t)p->lowpc;
|
||||
if (selfpcdiff < p->textsize) {
|
||||
u_int delta;
|
||||
|
||||
/*
|
||||
* Solidify the count for the current function.
|
||||
*/
|
||||
delta = cputime() - p->mexitcount_overhead;
|
||||
p->cputime_overhead_resid += p->cputime_overhead_frac;
|
||||
p->mexitcount_overhead_resid += p->mexitcount_overhead_frac;
|
||||
if ((int)delta < 0)
|
||||
*p->mexitcount_count += delta + p->mexitcount_overhead
|
||||
- p->cputime_overhead;
|
||||
else if (delta != 0) {
|
||||
if (p->cputime_overhead_resid >= CALIB_SCALE) {
|
||||
p->cputime_overhead_resid -= CALIB_SCALE;
|
||||
++*p->cputime_count;
|
||||
--delta;
|
||||
}
|
||||
if (delta != 0) {
|
||||
if (p->mexitcount_overhead_resid
|
||||
>= CALIB_SCALE) {
|
||||
p->mexitcount_overhead_resid
|
||||
-= CALIB_SCALE;
|
||||
++*p->mexitcount_count;
|
||||
--delta;
|
||||
}
|
||||
KCOUNT(p, selfpcdiff) += delta;
|
||||
}
|
||||
*p->mexitcount_count += p->mexitcount_overhead_sub;
|
||||
}
|
||||
*p->cputime_count += p->cputime_overhead;
|
||||
}
|
||||
}
|
||||
#endif /* GUPROF */
|
||||
|
Loading…
Reference in New Issue
Block a user