912e603778
looking at a high resolution clock for each of the following events: function call, function return, interrupt entry, interrupt exit, and interesting branches. The differences between the times of these events are added at appropriate places in a ordinary histogram (as if very fast statistical profiling sampled the pc at those places) so that ordinary gprof can be used to analyze the times. gmon.h: Histogram counters need to be 4 bytes for microsecond resolutions. They will need to be larger for the 586 clock. The comments were vax-centric and wrong even on vaxes. Does anyone disagree? gprof4.c: The standard gprof should support counters of all integral sizes and the size of the counter should be in the gmon header. This hack will do until then. (Use gprof4 -u to examine the results of non-statistical profiling.) config/*: Non-statistical profiling is configured with `config -pp'. `config -p' still gives ordinary profiling. kgmon/*: Non-statistical profiling is enabled with `kgmon -B'. `kgmon -b' still enables ordinary profiling (and distables non-statistical profiling) if non-statistical profiling is configured.
90 lines
3.4 KiB
C
90 lines
3.4 KiB
C
/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)profile.h 8.1 (Berkeley) 6/11/93
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* $Id: profile.h,v 1.4 1994/09/15 16:27:14 paul Exp $
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*/
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#ifndef _MACHINE_PROFILE_H_
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#define _MACHINE_PROFILE_H_
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#if 0
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#define _MCOUNT_DECL static inline void _mcount
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#define MCOUNT \
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extern void mcount() asm("mcount"); void mcount() { \
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fptrint_t selfpc, frompc; \
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/* \
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* Find the return address for mcount, \
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* and the return address for mcount's caller. \
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* \
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* selfpc = pc pushed by call to mcount \
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*/ \
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asm("movl 4(%%ebp),%0" : "=r" (selfpc)); \
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/* \
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* frompc = pc pushed by call to mcount's caller. \
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* The caller's stack frame has already been built, so %ebp is \
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* the caller's frame pointer. The caller's raddr is in the \
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* caller's frame following the caller's caller's frame pointer. \
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*/ \
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asm("movl (%%ebp),%0" : "=r" (frompc)); \
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frompc = ((fptrint_t *)frompc)[1]; \
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_mcount(frompc, selfpc); \
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}
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#else
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#define _MCOUNT_DECL void mcount
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#define MCOUNT
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#endif
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#define MCOUNT_ENTER { save_eflags = read_eflags(); disable_intr(); }
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#define MCOUNT_EXIT (write_eflags(save_eflags))
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#define CALIB_SCALE 1000
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#define KCOUNT(p,index) ((p)->kcount[(index) \
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/ (HISTFRACTION * sizeof(*(p)->kcount))])
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#define PC_TO_I(p, pc) ((fptrint_t)(pc) - (fptrint_t)(p)->lowpc)
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/* An unsigned integral type that can hold function pointers. */
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typedef u_int fptrint_t;
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/*
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* An unsigned integral type that can hold non-negative difference between
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* function pointers.
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*/
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typedef int fptrdiff_t;
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u_int cputime __P((void));
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void mcount __P((fptrint_t frompc, fptrint_t selfpc));
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void mexitcount __P((fptrint_t selfpc));
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#endif /* !MACHINE_PROFILE_H */
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