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strace/resource.c
Denys Vlasenko 1945ccc3fb Assorted trivial optimizations 
text	   data	    bss	    dec	    hex	filename
 236448	    672	  19044	 256164	  3e8a4	strace.before
 236360	    672	  19044	 256076	  3e84c	strace

* file.c (sprintmode): Use smaller static buffer, eliminate strlen call.
(sprinttime): Use smaller static buffer.
(printstat_sparc64): Coalesce two printing calls into one.
(printstat_powerpc32): Likewise.
(printcompat_statfs6): Likewise.
(sys_utime): Do not fetch personality_wordsize[current_personality]
repeatedly - cache it in local variable instead.
* process.c (printargv): Likewise.
* resource.c (sprintrlim): Return const char*, not char*. This allows
to eliminate sprintf(buf, "RLIM_INFINITY"). Use smaller static buffer.
(sprintrlim64): Likewise.
* strace.c (strerror): Use smaller static buffer.
(strsignal): Likewise.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2012-02-27 14:37:48 +01:00

456 lines
11 KiB
C
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/*
* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $Id$
*/
#include "defs.h"
#include <sys/resource.h>
#include <sys/times.h>
#include <linux/kernel.h>
#if HAVE_LONG_LONG_RLIM_T
/*
* Hacks for systems that have a long long rlim_t
*/
#define rlimit64 rlimit /* Ugly hack */
#define rlim64_t rlim_t /* Ugly hack */
#ifndef RLIM64_INFINITY
#define RLIM64_INFINITY RLIM_INFINITY /* You guessed it */
#endif
#define sys_getrlimit64 sys_getrlimit
#define sys_setrlimit64 sys_setrlimit
#endif
static const struct xlat resources[] = {
#ifdef RLIMIT_AS
{ RLIMIT_AS, "RLIMIT_AS" },
#endif
#ifdef RLIMIT_CORE
{ RLIMIT_CORE, "RLIMIT_CORE" },
#endif
#ifdef RLIMIT_CPU
{ RLIMIT_CPU, "RLIMIT_CPU" },
#endif
#ifdef RLIMIT_DATA
{ RLIMIT_DATA, "RLIMIT_DATA" },
#endif
#ifdef RLIMIT_FSIZE
{ RLIMIT_FSIZE, "RLIMIT_FSIZE" },
#endif
#ifdef RLIMIT_LOCKS
{ RLIMIT_LOCKS, "RLIMIT_LOCKS" },
#endif
#ifdef RLIMIT_MEMLOCK
{ RLIMIT_MEMLOCK, "RLIMIT_MEMLOCK" },
#endif
#ifdef RLIMIT_MSGQUEUE
{ RLIMIT_MSGQUEUE, "RLIMIT_MSGQUEUE" },
#endif
#ifdef RLIMIT_NICE
{ RLIMIT_NICE, "RLIMIT_NICE" },
#endif
#ifdef RLIMIT_NOFILE
{ RLIMIT_NOFILE, "RLIMIT_NOFILE" },
#endif
#ifdef RLIMIT_NPROC
{ RLIMIT_NPROC, "RLIMIT_NPROC" },
#endif
#ifdef RLIMIT_RSS
{ RLIMIT_RSS, "RLIMIT_RSS" },
#endif
#ifdef RLIMIT_RTPRIO
{ RLIMIT_RTPRIO, "RLIMIT_RTPRIO" },
#endif
#ifdef RLIMIT_SIGPENDING
{ RLIMIT_SIGPENDING, "RLIMIT_SIGPENDING" },
#endif
#ifdef RLIMIT_STACK
{ RLIMIT_STACK, "RLIMIT_STACK" },
#endif
#ifdef RLIMIT_VMEM
{ RLIMIT_VMEM, "RLIMIT_VMEM" },
#endif
{ 0, NULL },
};
#if !HAVE_LONG_LONG_RLIM_T
static const char *
sprintrlim(long lim)
{
static char buf[sizeof(long)*3 + sizeof("%ld*1024")];
if (lim == RLIM_INFINITY)
return "RLIM_INFINITY";
if (lim > 1024 && lim%1024 == 0)
sprintf(buf, "%ld*1024", lim/1024);
else
sprintf(buf, "%ld", lim);
return buf;
}
# if defined(POWERPC64) || defined(X86_64)
static void
print_rlimit32(struct tcb *tcp)
{
struct rlimit32 {
unsigned int rlim_cur;
unsigned int rlim_max;
} rlim;
if (umove(tcp, tcp->u_arg[1], &rlim) < 0)
tprints("{...}");
else {
tprintf("{rlim_cur=%s,",
sprintrlim(rlim.rlim_cur == -1 ? RLIM_INFINITY
: rlim.rlim_cur));
tprintf(" rlim_max=%s}",
sprintrlim(rlim.rlim_max == -1 ? RLIM_INFINITY
: rlim.rlim_max));
}
}
# endif
int
sys_getrlimit(struct tcb *tcp)
{
struct rlimit rlim;
if (entering(tcp)) {
printxval(resources, tcp->u_arg[0], "RLIMIT_???");
tprints(", ");
}
else {
if (syserror(tcp) || !verbose(tcp))
tprintf("%#lx", tcp->u_arg[1]);
# if defined(POWERPC64) || defined(X86_64)
else if (current_personality == 1)
print_rlimit32(tcp);
# endif
else if (umove(tcp, tcp->u_arg[1], &rlim) < 0)
tprints("{...}");
else {
tprintf("{rlim_cur=%s,", sprintrlim(rlim.rlim_cur));
tprintf(" rlim_max=%s}", sprintrlim(rlim.rlim_max));
}
}
return 0;
}
int
sys_setrlimit(struct tcb *tcp)
{
struct rlimit rlim;
if (entering(tcp)) {
printxval(resources, tcp->u_arg[0], "RLIMIT_???");
tprints(", ");
if (!verbose(tcp))
tprintf("%#lx", tcp->u_arg[1]);
# if defined(POWERPC64) || defined(X86_64)
else if (current_personality == 1)
print_rlimit32(tcp);
# endif
else if (umove(tcp, tcp->u_arg[1], &rlim) < 0)
tprints("{...}");
else {
tprintf("{rlim_cur=%s,", sprintrlim(rlim.rlim_cur));
tprintf(" rlim_max=%s}", sprintrlim(rlim.rlim_max));
}
}
return 0;
}
#endif /* !HAVE_LONG_LONG_RLIM_T */
#if _LFS64_LARGEFILE || HAVE_LONG_LONG_RLIM_T
static const char *
sprintrlim64(rlim64_t lim)
{
static char buf[sizeof(long long)*3 + sizeof("%lld*1024")];
if (lim == RLIM64_INFINITY)
return "RLIM64_INFINITY";
if (lim > 1024 && lim%1024 == 0)
sprintf(buf, "%lld*1024", (long long) lim/1024);
else
sprintf(buf, "%lld", (long long) lim);
return buf;
}
int
sys_getrlimit64(struct tcb *tcp)
{
struct rlimit64 rlim;
if (entering(tcp)) {
printxval(resources, tcp->u_arg[0], "RLIMIT_???");
tprints(", ");
}
else {
if (syserror(tcp) || !verbose(tcp))
tprintf("%#lx", tcp->u_arg[1]);
else if (umove(tcp, tcp->u_arg[1], &rlim) < 0)
tprints("{...}");
else {
tprintf("{rlim_cur=%s,", sprintrlim64(rlim.rlim_cur));
tprintf(" rlim_max=%s}", sprintrlim64(rlim.rlim_max));
}
}
return 0;
}
int
sys_setrlimit64(struct tcb *tcp)
{
struct rlimit64 rlim;
if (entering(tcp)) {
printxval(resources, tcp->u_arg[0], "RLIMIT_???");
tprints(", ");
if (!verbose(tcp))
tprintf("%#lx", tcp->u_arg[1]);
else if (umove(tcp, tcp->u_arg[1], &rlim) < 0)
tprints("{...}");
else {
tprintf("{rlim_cur=%s,", sprintrlim64(rlim.rlim_cur));
tprintf(" rlim_max=%s}", sprintrlim64(rlim.rlim_max));
}
}
return 0;
}
#endif /* _LFS64_LARGEFILES || HAVE_LONG_LONG_RLIM_T */
static const struct xlat usagewho[] = {
{ RUSAGE_SELF, "RUSAGE_SELF" },
{ RUSAGE_CHILDREN, "RUSAGE_CHILDREN" },
#ifdef RUSAGE_BOTH
{ RUSAGE_BOTH, "RUSAGE_BOTH" },
#endif
{ 0, NULL },
};
#ifdef ALPHA
void
printrusage32(struct tcb *tcp, long addr)
{
struct timeval32 {
unsigned tv_sec;
unsigned tv_usec;
};
struct rusage32 {
struct timeval32 ru_utime; /* user time used */
struct timeval32 ru_stime; /* system time used */
long ru_maxrss; /* maximum resident set size */
long ru_ixrss; /* integral shared memory size */
long ru_idrss; /* integral unshared data size */
long ru_isrss; /* integral unshared stack size */
long ru_minflt; /* page reclaims */
long ru_majflt; /* page faults */
long ru_nswap; /* swaps */
long ru_inblock; /* block input operations */
long ru_oublock; /* block output operations */
long ru_msgsnd; /* messages sent */
long ru_msgrcv; /* messages received */
long ru_nsignals; /* signals received */
long ru_nvcsw; /* voluntary context switches */
long ru_nivcsw; /* involuntary " */
} ru;
if (!addr)
tprints("NULL");
else if (syserror(tcp) || !verbose(tcp))
tprintf("%#lx", addr);
else if (umove(tcp, addr, &ru) < 0)
tprints("{...}");
else if (!abbrev(tcp)) {
tprintf("{ru_utime={%lu, %lu}, ru_stime={%lu, %lu}, ",
(long) ru.ru_utime.tv_sec, (long) ru.ru_utime.tv_usec,
(long) ru.ru_stime.tv_sec, (long) ru.ru_stime.tv_usec);
tprintf("ru_maxrss=%lu, ru_ixrss=%lu, ",
ru.ru_maxrss, ru.ru_ixrss);
tprintf("ru_idrss=%lu, ru_isrss=%lu, ",
ru.ru_idrss, ru.ru_isrss);
tprintf("ru_minflt=%lu, ru_majflt=%lu, ru_nswap=%lu, ",
ru.ru_minflt, ru.ru_majflt, ru.ru_nswap);
tprintf("ru_inblock=%lu, ru_oublock=%lu, ",
ru.ru_inblock, ru.ru_oublock);
tprintf("ru_msgsnd=%lu, ru_msgrcv=%lu, ",
ru.ru_msgsnd, ru.ru_msgrcv);
tprintf("ru_nsignals=%lu, ru_nvcsw=%lu, ru_nivcsw=%lu}",
ru.ru_nsignals, ru.ru_nvcsw, ru.ru_nivcsw);
}
else {
tprintf("{ru_utime={%lu, %lu}, ru_stime={%lu, %lu}, ...}",
(long) ru.ru_utime.tv_sec, (long) ru.ru_utime.tv_usec,
(long) ru.ru_stime.tv_sec, (long) ru.ru_stime.tv_usec);
}
}
#endif
void
printrusage(struct tcb *tcp, long addr)
{
struct rusage ru;
if (!addr)
tprints("NULL");
else if (syserror(tcp) || !verbose(tcp))
tprintf("%#lx", addr);
else if (umove(tcp, addr, &ru) < 0)
tprints("{...}");
else if (!abbrev(tcp)) {
tprintf("{ru_utime={%lu, %lu}, ru_stime={%lu, %lu}, ",
(long) ru.ru_utime.tv_sec, (long) ru.ru_utime.tv_usec,
(long) ru.ru_stime.tv_sec, (long) ru.ru_stime.tv_usec);
tprintf("ru_maxrss=%lu, ru_ixrss=%lu, ",
ru.ru_maxrss, ru.ru_ixrss);
tprintf("ru_idrss=%lu, ru_isrss=%lu, ",
ru.ru_idrss, ru.ru_isrss);
tprintf("ru_minflt=%lu, ru_majflt=%lu, ru_nswap=%lu, ",
ru.ru_minflt, ru.ru_majflt, ru.ru_nswap);
tprintf("ru_inblock=%lu, ru_oublock=%lu, ",
ru.ru_inblock, ru.ru_oublock);
tprintf("ru_msgsnd=%lu, ru_msgrcv=%lu, ",
ru.ru_msgsnd, ru.ru_msgrcv);
tprintf("ru_nsignals=%lu, ru_nvcsw=%lu, ru_nivcsw=%lu}",
ru.ru_nsignals, ru.ru_nvcsw, ru.ru_nivcsw);
}
else {
tprintf("{ru_utime={%lu, %lu}, ru_stime={%lu, %lu}, ...}",
(long) ru.ru_utime.tv_sec, (long) ru.ru_utime.tv_usec,
(long) ru.ru_stime.tv_sec, (long) ru.ru_stime.tv_usec);
}
}
int
sys_getrusage(struct tcb *tcp)
{
if (entering(tcp)) {
printxval(usagewho, tcp->u_arg[0], "RUSAGE_???");
tprints(", ");
}
else
printrusage(tcp, tcp->u_arg[1]);
return 0;
}
#ifdef ALPHA
int
sys_osf_getrusage(struct tcb *tcp)
{
if (entering(tcp)) {
printxval(usagewho, tcp->u_arg[0], "RUSAGE_???");
tprints(", ");
}
else
printrusage32(tcp, tcp->u_arg[1]);
return 0;
}
#endif /* ALPHA */
int
sys_sysinfo(struct tcb *tcp)
{
struct sysinfo si;
if (exiting(tcp)) {
if (syserror(tcp) || !verbose(tcp))
tprintf("%#lx", tcp->u_arg[0]);
else if (umove(tcp, tcp->u_arg[0], &si) < 0)
tprints("{...}");
else {
tprintf("{uptime=%lu, loads=[%lu, %lu, %lu] ",
(long) si.uptime, (long) si.loads[0],
(long) si.loads[1], (long) si.loads[2]);
tprintf("totalram=%lu, freeram=%lu, ",
(long) si.totalram, (long) si.freeram);
tprintf("sharedram=%lu, bufferram=%lu} ",
(long) si.sharedram, (long) si.bufferram);
tprintf("totalswap=%lu, freeswap=%lu, procs=%hu}",
(long) si.totalswap, (long) si.freeswap,
si.procs);
}
}
return 0;
}
static const struct xlat priorities[] = {
{ PRIO_PROCESS, "PRIO_PROCESS" },
{ PRIO_PGRP, "PRIO_PGRP" },
{ PRIO_USER, "PRIO_USER" },
{ 0, NULL },
};
int
sys_getpriority(struct tcb *tcp)
{
if (entering(tcp)) {
printxval(priorities, tcp->u_arg[0], "PRIO_???");
tprintf(", %lu", tcp->u_arg[1]);
}
return 0;
}
int
sys_setpriority(struct tcb *tcp)
{
if (entering(tcp)) {
printxval(priorities, tcp->u_arg[0], "PRIO_???");
tprintf(", %lu, %ld", tcp->u_arg[1], tcp->u_arg[2]);
}
return 0;
}
int
sys_times(struct tcb *tcp)
{
struct tms tbuf;
if (exiting(tcp)) {
if (tcp->u_arg[0] == 0)
tprints("NULL");
else if (syserror(tcp))
tprintf("%#lx", tcp->u_arg[0]);
else if (umove(tcp, tcp->u_arg[0], &tbuf) < 0)
tprints("{...}");
else {
tprintf("{tms_utime=%lu, tms_stime=%lu, ",
tbuf.tms_utime, tbuf.tms_stime);
tprintf("tms_cutime=%lu, tms_cstime=%lu}",
tbuf.tms_cutime, tbuf.tms_cstime);
}
}
return 0;
}
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