The following tools are discussed in this article:
- The /proc file system, which has been enhanced to provide access to additional process information.
- The /proc-based tools, commonly found on System V systems, are now included.
- The pstat command
- The truss command
On AIX 5.2, the /proc file system can be used by both 32-bit and 64-bit control processes to get additional information about target processes using the new tools procwdx and procfiles. Two new directories, /proc/pid#/cwd and /proc/pid#/fd, have been created.
The /proc files contain data that presents the state of processes and threads in the system. This state is constantly changing while the system is operating. To lessen the load on system performance caused by reading /proc files, the /proc file system does not stop system activity while gathering the data for those files. A single read of a /proc file generally returns a coherent and fairly accurate representation of process or thread state. Because the state changes as the process or thread runs, multiple reads of /proc files may return representations that show different data and therefore appear to be inconsistent with each other.
The 12 simple utilities, similar to tools provided on Solaris, are very useful to developers for debugging and analyzing processes behavior. The /proc file system gives access to information about the current state of processes and threads, but in binary form. The /proc tools commands provide ASCII reports based on some of the available information.
You should exercise caution when using the -F flag. The procfiles, procldd, procmap, and procstack /proc tools stop their target processes while inspecting them and reporting the results. A process can do nothing while interrupt is stopped. Imposing two controlling processes on one victim process can lead to chaos.
On AIX 5.2, some of the proc tools cannot be applied to core files, and the ptime command is not available.
The proc tools are utilities that exercise features of /proc. Most of them take a list of process-ids (pid); those that do also accept /proc/nnn as a process-id, so the shell expansion /proc/* can be used to specify all processes in the system.
Table 1. Differences between Solaris and AIX 5.2
| Solaris 2.9 | AIX 5.2 |
| pflags [-r] [pid | core] | procflags [-r] [pid] |
| pcred [pid | core] | proccred [pid] |
| pmap [-rxIF] [pid | core] | procmap [-F] [pid] |
| pldd [-F] [pid | core] | procldd [-F] [pid] |
| pstack [-F] [pid | core] | procstack [-F] [pid] |
| pfiles [-F] [pid] | procfiles [-nF] [pid] |
| ptime command [argument] | Not available |
- proctree
- Displays the process tree containing the specified process IDs or users. To display the ancestors and all the children of process 12312, enter:
> proctree 21166 11238 /usr/sbin/srcmstr 21166 /usr/sbin/rsct/bin/IBM.AuditRMd
To display the ancestors and children of process 21166, including children of process 0, enter:
> proctree –a 21166 1 /etc/init 11238 /usr/sbin/srcmstr 21166 /usr/sbin/rsct/bin/IBM.AuditRMd - procstack
- Displays the hexadecimal addresses and symbolic names for each of the stack frames of the current thread in processes. To display the current stack of process 15052, enter:
> procstack 15052 15052 : /usr/sbin/snmpd d025ab80 select (?, ?, ?, ?, ?) + 90 100015f4 main (?, ?, ?) + 1814 10000128 __start () + 8c
Currently, procstack displays garbage or wrong information for the top stack frame, and possibly for the second top stack frame. Sometimes it will erroneously display "No frames found on the stack," and sometimes it will display: deadbeef ???????? (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ...) The fix for this problem had not been released at the writing of this article. When the fix becomes available, you need to download the APAR IY48543.
- procmap
- Displays a process address map. To display the address space of process 13204, enter:
>procmap 13204 13204 : /usr/sbin/biod 6 10000000 3K read/exec biod 20000910 0K read/write biod d0083100 79K read/exec /usr/lib/libiconv.a 20013bf0 41K read/write /usr/lib/libiconv.a d007a100 34K read/exec /usr/lib/libi18n.a 20011378 4K read/write /usr/lib/libi18n.a d0074000 11K read/exec /usr/lib/nls/loc/en_US d0077130 8K read/write /usr/lib/nls/loc/en_US d00730f8 2K read/exec /usr/lib/libcrypt.a f03c7508 0K read/write /usr/lib/libcrypt.a d01d4e20 1997K read/exec /usr/lib/libc.a f0337e90 570K read/write /usr/lib/libc.a
- procldd
- Displays a list of libraries loaded by a process. To display the list of dynamic libraries loaded by process 11928, enter
> procldd 11928. The output of this command might look like:11928 : -sh /usr/lib/nls/loc/en_US /usr/lib/libcrypt.a /usr/lib/libc.a
- procflags
- Displays a process tracing flags, and the pending and holding signals. To display the tracing flags of process 28138, enter:
> procflags 28138 28138 : /usr/sbin/rsct/bin/IBM.HostRMd data model = _ILP32 flags = PR_FORK /64763: flags = PR_ASLEEP | PR_NOREGS /66315: flags = PR_ASLEEP | PR_NOREGS /60641: flags = PR_ASLEEP | PR_NOREGS /66827: flags = PR_ASLEEP | PR_NOREGS /7515: flags = PR_ASLEEP | PR_NOREGS /70439: flags = PR_ASLEEP | PR_NOREGS /66061: flags = PR_ASLEEP | PR_NOREGS /69149: flags = PR_ASLEEP | PR_NOREGS
- procsig
- Lists the signal actions for a process. To list all the signal actions defined for process 30552, enter:
> procsig 30552 30552 : -ksh HUP caught INT caught QUIT caught ILL caught TRAP caught ABRT caught EMT caught FPE caught KILL default RESTART BUS caught
- proccred
- Prints a process' credentials. To display the credentials of process 25632, enter:
> proccred 25632 25632: e/r/suid=0 e/r/sgid=0
- procfiles
- Prints a list of open file descriptors. To display status and control information on the file descriptors opened by process 20138, enter:
> procfiles –n 20138 20138 : /usr/sbin/rsct/bin/IBM.CSMAgentRMd Current rlimit: 2147483647 file descriptors 0: S_IFCHR mode:00 dev:10,4 ino:4178 uid:0 gid:0 rdev:2,2 O_RDWR name:/dev/null 2: S_IFREG mode:0311 dev:10,6 ino:250 uid:0 gid:0 rdev:0,0 O_RDWR size:0 name:/var/ct/IBM.CSMAgentRM.stderr 4: S_IFREG mode:0200 dev:10,6 ino:255 uid:0 gid:0 rdev:0,0 - procwdx
- Prints the current working directory for a process. To display the current working directory of process 11928, enter:
> procwdx 11928 11928 : /home/guest
- procstop
- Stops a process. To stop process 7500 on the PR_REQUESTED event, enter
>procstop 7500. - procrun
- Restart a process. To restart process 30192 that was stopped on the PR_REQUESTED event, enter
> procrun 30192. - procwait
- Waits for all of the specified processes to terminate. To wait for process 12942 to exit and display the status, enter
> procwait -v 12942. The output of this command might look like:12942 : terminated, exit status 0
The pstat command, which displays many system tables such as a process table, inode table, or processor status table, has been ported to AIX 5.2 with the same functions. The pstat command interprets the contents of the various system tables and writes it to standard output.
This command is not supported on Solaris 2.9. Use the pstat command from the AIX 5.2 command prompt. See the command reference for details and examples, or use the syntax summary in Table 2 below.
Table 2. Flags
| -a | Displays entries in the process table |
| -A | Displays all entries in the kernel thread table |
| -f | Displays the file table |
| -i | Displays the i-node table and the i-node data block addresses |
| -p | Displays the process table |
| -P | Displays runnable kernel thread table entries only |
| -s | Displays information about the swap or paging space usage |
| -S | Displays the status of the processors |
| -t | Displays the tty structures |
| -u ProcSlot | Displays the user structure of the process in the designated slot of the process table. An error message is generated if you attempt to display a swapped out process. |
| -T | Displays the system variables. These variables are briefly described in var.h |
| -U ThreadSlot | Displays the user structure of the kernel thread in the designated slot of the kernel thread table. An error message is generated if you attempt to display a swapped out kernel thread. |
To display all threads in the kernel thread table and the user structure of the thread in thread table slot 0, enter:
>pstat -A -U 0
THREAD TABLE:
SLT ST TID PID CPUID POLICY PRI CPU EVENT PROCNAME FLAGS
0 s 3 0 unbound FIFO 10 78 swapper
flags: kthread
1 s 103 1 unbound other 3c 0 init
flags: local wakeonsig cdefer unknown: 0x10000
2 r 205 204 0 FIFO ff 78 wait
flags: funnel kthread
3 r 307 306 1 FIFO ff 78 wait
flags: funnel kthread
4 s 409 408 unbound RR 11 0 reaper
flags: kthread
UTHREAD AREA:
UTHREAD AREA FOR SLOT 0 (swapper)
SAVED MACHINE STATE
m/q:0x00000000 iar:0x0004baa8 cr:0x28222024
msr:0x000010b2 lr:0x0004baa8 xer:0x20000018 kjmpbuf:0x00000000
backtrack:0x00 tid:0x00000000 fpeu:0x01 excp_type:0x00000000
ctr:0x00000000 *prevmst:0x00000000 *stackfix:0x2ff3b2a8 intpri:0x00
…
General Purpose Regs
0x00000000 0x40000000 0x00054035 0xdff3c000 0x00000106
Adspace:
MST Segment Regs
0:0x00000000 1:0x0003800e 2:0x00044011 3:0x0003c00f
4:0x007fffff 5:0x007fffff 6:0x007fffff 7:0x0003402d
…
General Purpose Regs
0:0x00037ae4 1:0x2ff3b2a8 2:0x00675148 3:0xe2000154
4:0xffff0000 5:0x01fe4400 6:0x00000003 7:0x00000000
8:0x0017b140 9:0x00000001 10:0x2ff3b338 11:0x0017b140
12:0x000010b2 13:0x01066178 14:0x01000085 15:0x00000000
….
SYSTEM CALL STATE
error code:0x00 *kjmpbuf:0x00000000
PER-THREAD TIMER MANAGEMENT
timer[0] = 0x0
SIGNAL MANAGEMENT
*sigsp:0x000000000 code:0x0
MISCELLANOUS FIELDS:
fstid:0x00000000 ioctlrv:0x00000000 selchn:0x00000000
link:0x00000000 loginfo:0x00000000 fselchn:0x00000000
selbuc:0x00000000sigssz:0x0000000000000000 User msr:0x0000000000000000
*context:0x0000000000000000 **errnopp:0x00000000c0c0fade
*stkb:0x0000000000000000
*audsvc:0x00000000 scsave[0]:0x00000000 scsave[1]:0x00000000
…
USER AREA:
USER AREA OF ASSOCIATED PROCESS swapper (SLOT 0, PROCTAB 0x01fe4200)
handy_lock:0x00000000 timer_lock:0x00000000
map:0x00000000 *semundo:0x00000000 *pinu_block:0x00000000
compatibility:0x00000001 lock:0x00000000
ulocks:0x00000000 *message:0x00000000 irss:0x0000000000000000
lock_word:0x00000000 *vmm_lock_wait:0x00000000 vmmflags:0x00000000
SIGNAL MANAGEMENT
Signals to be blocked (sig#:hi/lo mask,flags,&func)
1:hi 0x00000000,lo 0x00000000,0x00000000,0x00000000
INTERNAL SIGNALS
64:hi 0x00000000,lo 0x00000000,0x00000000,0x00000000
65:hi 0x00000000,lo 0x00000000,0x00000000,0x00000000
USER INFORMATION
CRED Structure Not Found
ACCOUNTING DATA
start:0x3f818c87 ticks:0x00000000 acflag:0x0000 pr_base:0x00000000
pr_size:0x00000000 pr_off:0x00000000 pr_scale:0x00000000
process times:
user:0x00000000s 0x00000000us
sys:0x00000000s 0x0007df0dus
children's times:
user:0x00000000s 0x00000000us
sys:0x00000000s 0x00000000us
CONTROLLING TTY
*ttysid:0x00000000 *ttyp(pgrp):0x00000000
ttyd(evice):0x00000000 ttympx:0x00000000 *ttys(tate):0x00000000
tty id: 0x00000000 *query function: 0x00000000
RESOURCE LIMITS AND COUNTERS
ior:0x00000000 iow:0x00000000 ioch:0x00000000
text:0x0000000000000000 data:0x0000000000000000 stk:0x01000000
max data:0x08000000 max stk:0x01000000 max file(blks):0xffffffff
*tstart:0x00000000 sdsize:0x00000000
*datastart:0x00000000 *stkstart0x20000000
U_minbreak:0x0000000020000000 U_breakhiwater 0000000020000000
U_min_mmap:0x0000000000000000 U_brkseg 00000002 U_stkseg 00000002
FILE SYSTEM STATE
*curdir:0x00000000 *rootdir:0x00000000
cmask:0x0000 maxindex:0x00000000
U_fd_slcks[0].u_fd_slock:0x00000000
U_fd_slcks[1].u_fd_slock:0x00000000
U_fd_slcks[2].u_fd_slock:0x00000000
fso_lock:0x00000000 lockflag:0x00000000 fdevent:0x00000000
FILE DESCRIPTOR TABLE
*ufd: 0x2ff3cee8
|
To display the system variables, enter:
> pstat -T SYSTEM VARS: Buffers 20 Files 853 e_files 853 procs 262144 e_procs 128 threads 524288 e_threads 224 clists 16384 maxproc 128 … |
To display the current kernel table entries, enter:
> pstat -P
THREAD TABLE:
SLT ST TID PID CPUID POLICY PRI CPU EVENT PROCNAME FLAGS
2 r 205 204 0 FIFO ff 78 wait
flags: funnel kthread
67 r 435f 619c unbound other 3c 6 pstat
flags:
|
To display the process tables, enter:
> pstat -p
PROC TABLE:
SLT ST PID PPID PGRP UID EUID TCNT NAME
2 a 204 0 0 0 0 1 wait
FLAGS:swapped_inno_swapfixed_prikproc
3 a 306 0 0 0 0 1 wait
FLAGS:swapped_inno_swapfixed_prikproc
124 a 7cc2 6fae 7cc2 0 0 1 pstat
FLAGS:swapped_in execed
|
To display the processors, enter:
> pstat -S STATUS OF PROCESSORS: CPU TID TSLOT PID PSLOT PROC_NAME 0 205 2 204 2 wait 1 5ab7 90 7cc4 124 pstat |
To display the paging space, enter:
> pstat -s
PAGE SPACE:
USED PAGES FREE PAGES
1261 129811
|
The truss command is also available for SVR4 UNIX-based environments. This command is useful for tracing system calls in one or more processes. In AIX 5.2, all base system call parameter types are now recognized. In AIX 5.1, only about 40 system calls were recognized.
Truss is a /proc based debugging tool that executes and traces a command, or traces an existing process. It prints names of all system calls made with their arguments and return code. System call parameters are displayed symbolically. It prints information about all signals received by a process. The AIX 5.2 version supports library calls tracing. For each call, it prints parameters and return codes. It can also trace a subset of libraries and a subset of routines in a given library. The timestamps on each line are also supported.
In AIX 5.2, truss is packaged with bos.sysmgt.serv_aid, which is installable from the AIX base installation media. See the command reference for details and examples, or use the information below.
-a Displays the parameter strings that are passed in each executed system call.
> truss –a sleep
execve("/usr/bin/sleep", 0x2FF22980, 0x2FF22988) argc: 1
argv: sleep
sbrk(0x00000000) = 0x200007A4
sbrk(0x00010010) = 0x200007B0
getuidx(4) = 0
…
…
__loadx(0x01000080, 0x2FF1E790, 0x00003E80, 0x2FF22720, 0x00000000) =
0xD0077130 access("/usr/lib/nls/msg/en_US/sleep.cat", 0) = 0
_getpid() = 31196
open("/usr/lib/nls/msg/en_US/sleep.cat", O_RDONLY) = 3
kioctl(3, 22528, 0x00000000, 0x00000000) Err#25 ENOTTY
kfcntl(3, F_SETFD, 0x00000001) = 0
kioctl(3, 22528, 0x00000000, 0x00000000) Err#25 ENOTTY
kread(3, "\0\001 ∙\001\001 I S O 8".., 4096) = 123
lseek(3, 0, 1) = 123
lseek(3, 0, 1) = 123
lseek(3, 0, 1) = 123
_getpid() = 31196
lseek(3, 0, 1) = 123
Usage: sleep Seconds
kwrite(2, " U s a g e : s l e e p".., 21) = 21
kfcntl(1, F_GETFL, 0x00000000) = 2
kfcntl(2, F_GETFL, 0x00000000) = 2
_exit(2)
|
-c Counts traced system calls, faults, and signals rather than displaying trace results line by line. A summary report is produced after the traced command terminates or when truss is interrupted. If the -f flag is also used, the counts include all traced Syscalls, Faults, and Signals for child processes.
> truss –c ls
syscall seconds calls errors
execve .00 1
__loadx .00 17
_exit .00 1
close .00 2
kwrite .00 5
lseek .00 1
setpid .00 1
getuidx .00 19
getdirent .00 3
kioctl .00 3
open .00 1
statx .00 2
getgidx .00 18
sbrk .00 4
access .00 1
kfcntl .00 6
---- --- ---
sys totals: .01 85 0
usr time: .00
elapsed: .01
|
-d A timestamp will be included with each line of output. Time displayed is in seconds relative to the beginning of the trace. The first line of the trace output will show the base time from which the individual time stamps are measured. By default timestamps are not displayed.
>truss –d sleep
0.0029: execve("/usr/bin/sleep", 0x2FF22978, 0x2FF22980) argc: 1
0.0369: sbrk(0x00000000) = 0x200007A4
0.0381: sbrk(0x0000000C) = 0x200007A4
0.0394: sbrk(0x00010010) = 0x200007B0
0.0406: getuidx(4) = 0
0.0416: getuidx(2) = 0
0.0426: getuidx(1) = 0
0.0436: getgidx(4) = 0
0.0446: getgidx(2) = 0
0.0456: getgidx(1) = 0
0.0468: __loadx(0x01000080, 0x2FF1E780, 0x00003E80, 0x2FF22710,
0x00000000) = 0xD0077130
|
-D Delta time is displayed on each line of output. The delta time represents the elapsed time for the LWP that incurred the event since the last reported event incurred by that thread. By default delta times are not displayed.
>truss –D sleep
0.0002: execve("/usr/bin/sleep", 0x2FF22978, 0x2FF22980) argc: 1
0.0345: sbrk(0x00000000) = 0x200007A4
0.0013: sbrk(0x0000000C) = 0x200007A4
0.0013: sbrk(0x00010010) = 0x200007B0
0.0012: getuidx(4) = 0
0.0010: getuidx(2) = 0
0.0010: getuidx(1) = 0
0.0010: getgidx(4) = 0
0.0011: getgidx(2) = 0
0.0010: getgidx(1) = 0
0.0012: __loadx(0x01000080, 0x2FF1E780, 0x00003E80, 0x2FF22710,
0x00000000) = 0xD007130
|
-e Displays the environment strings that are passed in each executed system call.
>truss –e ls
execve("/usr/bin/ls", 0x2FF22980, 0x2FF22988) argc: 1
envp: _=/usr/bin/truss MANPATH=:/opt/freeware/man LANG=en_US
LOGIN=root PAGER=pg ENSCRIPT=-G -broot@nkeung VISUAL=/usr/bin/vi
RPC_SUPPORTED_PROTSEQS=ncadg_ip_udp
PATH=/usr/java14/jre/bin:/usr/java14/bin:/usr/opt/ifor/bin:/perf/
jinsight2.1:/usr/vvac/bin:/usr/vacpp/bin:/usr/bin:/etc:/usr/sbin:/
usr/ucb:/usr/bin/X11:/sbin:/usr/local/bin:/usr/idebug/bin:/usr/
lib:/usr/prod/bin:/usr/afs/bin:/usr/vatools/bin:/opt/freeware/bin:.:/
var/ifo
/usr/opt/ifor/ls/conf
LC__FASTMSG=true CGI_DIRECTORY=/usr/HTTPServer/cgi-bin
EDITOR=/usr/bin/vi PSCH=> TTYNAME=pts/3 LOGNAME=root
MAIL=/usr/spool/mail/root SECONDS=34097 MOZILLA_HOME=/opt/netscape
LOCPATH=/usr/lib/nls/loc PS1=$_place ${PWD}: ${PSCH}
PRINTER=labnetps HOST=nkeung
DOCUMENT_SERVER_MACHINE_NAME=nkeung.austin.ibm.com USER=root
AUTHSTATE=compat DCE_USE_WCHAR_NAMES=1 DEFAULT_BROWSER=netscape
SHELL=/usr/bin/ksh ODMDIR=/etc/objrepos DOCUMENT_SERVER_PORT=80
HOME=/ FCEDIT=/usr/bin/vi TERM=ansi MAILMSG=[YOU HAVE NEW MAIL]
_place=root@nkeung ITECONFIGSRV=/etc/IMNSearch PWD=/home
DOCUMENT_DIRECTORY=/usr/HTTPServer/htdocs TZ=CST6CDT LPDEST=labnetps
ENV=${START[(_$-=1)+(_=0)-(_$-!=_${-%%*i*})]} START=//.kshrc
TRY_PE_SITE=1 ITECONFIGCL=/etc/IMNSearch/clients
ITE_DOC_SEARCH_INSTANCE=search A__z=! LOGNAME
NLSPATH=/usr/lib/nls/msg/%L/%N:/usr/lib/nls/msg/%L/%N.cat
sbrk(0x00000000) = 0x20000EA8
…..
|
-u [!] [LibraryName [...]::[!]FunctionName [...] ] Traces dynamically loaded user level function calls from user libraries. The LibraryName is a comma-separated list of library names. The FunctionName is a comma-separated list of function names. In both cases the names can include name-matching metacharacters *, ?, [] with the same meanings as interpreted by the shell, but as applied to the library or function name spaces, and not to files.
- To trace all user-level calls made to any function in the C library from outside the C library, enter:
>truss –u "libc.a::*" ls
- To trace the open() function call in the libc.a while running the motd command, enter:
> truss -t open -u 'libc*::*open*' /usr/bin/cat /etc/motd open("/etc/motd", 0400000000) = 3 ****************************************************************** * * Welcome to AIX Version 5.2! * * * Please see the README file in /usr/lpp/bos for information * pertinent to * * this release of the AIX Operating System. * - To trace the malloc() function call and exclude the strlen() function call in the libc.a library while running the ls command, enter:
>truss -u libc.a::malloc,!strlen ls execve("/usr/bin/ls", 0x2FF22970, 0x2FF22978) argc: 1 sbrk(0x00000000) = 0x20000EA8 sbrk(0x00000008) = 0x20000EA8 sbrk(0x00010010) = 0x20000EB0 getuidx(4) = 0 getuidx(2) = 0 getuidx(1) = 0 getgidx(4) = 0 getgidx(2) = 0 getgidx(1) = 0 __loadx(0x01000080, 0x2FF1E760, 0x00003E80, 0x2FF226F0, 0x00000000) = 0xD0077130 ->libc.a:malloc(0xc) <-libc.a:malloc() = 20001058 0.000000 ->libc.a:malloc(0x188) <-libc.a:malloc() = 20001078 0.000000 ->libc.a:malloc(0x40) <-libc.a:malloc() = 20001208 0.000000 ->libc.a:malloc(0x3c) <-libc.a:malloc() = 20001258 0.000000 - To trace all function calls in the libc.a library with names starting with "m" while running the ls command, enter:
>truss -u libc.a::m*,!strlen ls execve("/usr/bin/ls", 0x2FF22970, 0x2FF22978) argc: 1 ->libc.a:malloc(0xc) <-libc.a:malloc() = 20001058 0.000000 ->libc.a:malloc(0x188) …. kwrite(1, 0xF0382258, 1) = 1 ->libc.a:mbswidth(0x20021678, 0x9) ->libc.a:mbtowc(0x2ff21520, 0x2ff21420, 0x1) ->libc.a:mbtowc(0x2ff21522, 0x2ff21421, 0x1) ->libc.a:mbtowc(0x2ff21524, 0x2ff21422, 0x1) … <-libc.a:mbswidth() = 9 0.000000 .netscapekwrite(1, 0xF0382258, 9) = 9 ->libc.a:mbswidth(0x20022af8, 0x8) ->libc.a:mbtowc(0x2ff21520, 0x2ff21420, 0x1) ->libc.a:mbtowc(0x2ff21522, 0x2ff21421, 0x1) ->libc.a:mbtowc(0x2ff21524, 0x2ff21422, 0x1) ->libc.a:mbtowc(0x2ff21526, 0x2ff21423, 0x1) <-libc.a:mbswidth() = 8 0.000000 kdb.corekwrite(1, 0xF0382258, 25) = 25 ->libc.a:mbswidth(0x2001f900, 0x3) ->libc.a:mbtowc(0x2ff21520, 0x2ff21420, 0x1) ->libc.a:mbtowc(0x2ff21522, 0x2ff21421, 0x1) ->libc.a:mbtowc(0x2ff21524, 0x2ff21422, 0x1) <-libc.a:mbswidth() = 3 0.000000 usrkwrite(1, 0xF0382258, 21) = 21 - To trace all function calls from the library libcurses.a and exclude calls from libc.a while running executable foo, enter:
>truss -u libcurses.a,!libc.a::* foo
- To trace the refresh() function call from libcurses.a and the malloc() function call from libc.a while running the executable foo, enter:
>truss -u libc.a::malloc -u libcurses.a::refresh foo
Nam Keung is a senior programmer for IBM in Austin, TX. He has worked in the area of AIX ISDN communication, AIX SOM/DSOM development, AIX Multimedia development, NT Clustering technology and Java performance. His current assignment involves helping ISVs in porting, deploying applications, performance tuning, and education for the pSeries platform. He has been a programmer with IBM since 1987. Nam can be reached at namkeung@us.ibm.com.
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