Dmitry V. Levin
7d61ff1dbf
Move counts code to separate file. * count.c: New file. * Makefile.am (strace_SOURCES): Add count.c. * syscall.c (call_counts, countv, counts, shortest, time_cmp, syscall_cmp, count_cmp, sortfun, overhead, set_sortby, set_overhead, call_summary_pers, call_summary): Move to count.c * count.c (count_syscall): New function. * defs.h (count_syscall): Declare it. * syscall.c (trace_syscall): Use it.
251 lines
6.6 KiB
C
251 lines
6.6 KiB
C
/*
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* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
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* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
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* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
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* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
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* Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Linux for s390 port by D.J. Barrow
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* <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
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* Copyright (c) 2004 Roland McGrath <roland@redhat.com>
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* Copyright (c) 2006 Dmitry V. Levin <ldv@altlinux.org>
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* 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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id$
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*/
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#include "defs.h"
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struct call_counts {
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struct timeval time;
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int calls, errors;
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};
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static struct call_counts *countv[SUPPORTED_PERSONALITIES];
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#define counts (countv[current_personality])
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static struct timeval shortest = { 1000000, 0 };
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int
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count_syscall(struct tcb *tcp, struct timeval *tv)
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{
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tcp->flags &= ~TCB_INSYSCALL;
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if (tcp->scno < 0 || tcp->scno >= nsyscalls)
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return 0;
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if (!counts)
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{
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counts = calloc(nsyscalls, sizeof(*counts));
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if (!counts)
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{
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fprintf(stderr,
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"strace: out of memory for call counts\n");
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exit(1);
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}
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}
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counts[tcp->scno].calls++;
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if (tcp->u_error)
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counts[tcp->scno].errors++;
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tv_sub(tv, tv, &tcp->etime);
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#ifdef LINUX
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if (tv_cmp(tv, &tcp->dtime) > 0)
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{
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static struct timeval one_tick;
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if (one_tick.tv_usec == 0)
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{
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/* Initialize it. */
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struct itimerval it;
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memset(&it, 0, sizeof it);
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it.it_interval.tv_usec = 1;
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setitimer(ITIMER_REAL, &it, NULL);
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getitimer(ITIMER_REAL, &it);
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one_tick = it.it_interval;
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}
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if (tv_nz(&tcp->dtime))
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*tv = tcp->dtime;
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else if (tv_cmp(tv, &one_tick) > 0)
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{
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if (tv_cmp(&shortest, &one_tick) < 0)
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*tv = shortest;
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else
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*tv = one_tick;
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}
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}
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#endif /* LINUX */
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if (tv_cmp(tv, &shortest) < 0)
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shortest = *tv;
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tv_add(&counts[tcp->scno].time, &counts[tcp->scno].time, tv);
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return 0;
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}
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static int
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time_cmp(void *a, void *b)
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{
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return -tv_cmp(&counts[*((int *) a)].time,
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&counts[*((int *) b)].time);
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}
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static int
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syscall_cmp(void *a, void *b)
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{
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return strcmp(sysent[*((int *) a)].sys_name,
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sysent[*((int *) b)].sys_name);
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}
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static int
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count_cmp(void *a, void *b)
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{
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int m = counts[*((int *) a)].calls;
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int n = counts[*((int *) b)].calls;
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return (m < n) ? 1 : (m > n) ? -1 : 0;
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}
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static int (*sortfun)();
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static struct timeval overhead = { -1, -1 };
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void
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set_sortby(char *sortby)
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{
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if (strcmp(sortby, "time") == 0)
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sortfun = time_cmp;
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else if (strcmp(sortby, "calls") == 0)
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sortfun = count_cmp;
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else if (strcmp(sortby, "name") == 0)
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sortfun = syscall_cmp;
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else if (strcmp(sortby, "nothing") == 0)
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sortfun = NULL;
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else
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{
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fprintf(stderr, "invalid sortby: `%s'\n", sortby);
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exit(1);
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}
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}
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void set_overhead(int n)
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{
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overhead.tv_sec = n / 1000000;
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overhead.tv_usec = n % 1000000;
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}
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static void
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call_summary_pers(FILE *outf)
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{
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int i, j;
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int call_cum, error_cum;
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struct timeval tv_cum, dtv;
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double percent;
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char *dashes = "-------------------------";
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char error_str[16];
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int *sorted_count = calloc(sizeof(int), nsyscalls);
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call_cum = error_cum = tv_cum.tv_sec = tv_cum.tv_usec = 0;
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if (overhead.tv_sec == -1)
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{
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tv_mul(&overhead, &shortest, 8);
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tv_div(&overhead, &overhead, 10);
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}
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for (i = 0; i < nsyscalls; i++)
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{
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sorted_count[i] = i;
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if (counts == NULL || counts[i].calls == 0)
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continue;
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tv_mul(&dtv, &overhead, counts[i].calls);
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tv_sub(&counts[i].time, &counts[i].time, &dtv);
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call_cum += counts[i].calls;
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error_cum += counts[i].errors;
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tv_add(&tv_cum, &tv_cum, &counts[i].time);
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}
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if (counts && sortfun)
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qsort((void *) sorted_count, nsyscalls, sizeof(int), sortfun);
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fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %s\n",
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"% time", "seconds", "usecs/call",
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"calls", "errors", "syscall");
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fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
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dashes, dashes, dashes, dashes, dashes, dashes);
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if (counts)
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{
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for (i = 0; i < nsyscalls; i++)
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{
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j = sorted_count[i];
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if (counts[j].calls == 0)
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continue;
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tv_div(&dtv, &counts[j].time, counts[j].calls);
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if (counts[j].errors)
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sprintf(error_str, "%d", counts[j].errors);
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else
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error_str[0] = '\0';
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percent = (100.0 * tv_float(&counts[j].time)
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/ tv_float(&tv_cum));
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fprintf(outf, "%6.2f %4ld.%06ld %11ld %9d %9.9s %s\n",
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percent, (long) counts[j].time.tv_sec,
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(long) counts[j].time.tv_usec,
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(long) 1000000 * dtv.tv_sec + dtv.tv_usec,
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counts[j].calls,
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error_str, sysent[j].sys_name);
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}
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}
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free(sorted_count);
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fprintf(outf, "%6.6s %11.11s %11.11s %9.9s %9.9s %-16.16s\n",
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dashes, dashes, dashes, dashes, dashes, dashes);
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if (error_cum)
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sprintf(error_str, "%d", error_cum);
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else
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error_str[0] = '\0';
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fprintf(outf, "%6.6s %4ld.%06ld %11.11s %9d %9.9s %s\n",
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"100.00", (long) tv_cum.tv_sec, (long) tv_cum.tv_usec, "",
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call_cum, error_str, "total");
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}
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void
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call_summary(FILE *outf)
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{
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int i, old_pers = current_personality;
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for (i = 0; i < SUPPORTED_PERSONALITIES; ++i)
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{
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if (!countv[i])
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continue;
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if (current_personality != i)
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set_personality(i);
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if (i)
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fprintf(outf,
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"System call usage summary for %u bit mode:\n",
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personality_wordsize[current_personality] * 8);
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call_summary_pers(outf);
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}
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if (old_pers != current_personality)
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set_personality(old_pers);
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}
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