09-22-2009
process doesn't crash when i use the truss ??
Hi All,
We a critical application running on the Sun Solaris platform. But, for some reasons the process get's killed abnormally in the production environment and not sure what was causing this. I thought i would use the truss command to trace the errors.. so i used the bellow command
truss -p <pid> once i issued this command my application didn't crash at all. It's been running for 24 hrs with out any issues. previously the application used to crash at least 2 hrs once. Can somebody please explain what's so special when i use the truss on a process id. Did any of you had similar situations ??? Please kindly suggest.
Thank you,
Sudharma.
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Can someone point me at resources for system calls? Specifically, I am trying to make sense of what I am seeing in a truss command. Thanks! (3 Replies)
Discussion started by: jpeery
3 Replies
2. UNIX for Advanced & Expert Users
I'm a DBA so no abuse please! I've for 5 Oracle Forms processes that are spinning and am trying to find out if they're doing anything:
Running HPUX 11.11
CPU TTY PID USERNAME PRI NI SIZE RES STATE TIME %WCPU %CPU COMMAND
9 ? 2735 oracle 241 20 24228K 16668K run 2607:29 84.92... (2 Replies)
Discussion started by: fraze
2 Replies
3. IP Networking
I have tried to analyze the log of truss shown below. I haven't found anything clear for me indicating the problem. The process is the server that accepts client connections. To establish the connection it starts the child thread then it should transfer data. In reality it gets only connection.... (1 Reply)
Discussion started by: gogogo
1 Replies
4. Programming
Hi
I'm currently using C++ on a HP-UX 11i system (upgrading some libraries) and am encountering a problem with the process crashing when allocating memory via a call to new (a rather large array of objects are being created).
Is there a way to find out what the sizes of the stack and heap are?... (1 Reply)
Discussion started by: themezzaman
1 Replies
5. Shell Programming and Scripting
Hi all,
while trying to debug and figure out why a lofiadm command was not working on my script, i came across a cmd called "truss"
all i know about it is that it executes the specified command and produces a trace of the system calls it performs, the signals it receives, and the machine faults... (5 Replies)
Discussion started by: wrapster
5 Replies
6. Shell Programming and Scripting
i have to gather some info about a process and redirect it to a1.txt file. For this i m using truss command
truss -po a1.txt $PID_Detail
where $PID_Detail= 1482944 3362976
--------------------------------------------------------------------------
Below the script:
#!/bin/ksh
for i... (6 Replies)
Discussion started by: ali560045
6 Replies
7. Programming
Hey everyone,
I have a process that is crashing, and I'd like to have some way to see where it crashes. Is this possible? (2 Replies)
Discussion started by: ctote
2 Replies
8. UNIX Desktop Questions & Answers
Hi,
I'm new to Linux.
I have a windows server that run many processes on it.
In some cases the processes doesn't exit properly or just stop working and the process needs to be killed.
I was wondering how i can automatically (couple of times a day) check which process doesn't use any CPU... (3 Replies)
Discussion started by: ramikom
3 Replies
9. AIX
Hi guys,
Is there some way to monitor a process but previously starting truss like this?
truss ls &
ls
Thanks in advance. (1 Reply)
Discussion started by: edgarvm
1 Replies
10. UNIX for Advanced & Expert Users
Hi,
I want to trace a background java program which runs in infinite loop. I have used truss command for this.
But the program terminated after some hours with below truss output:
Received signal #1, SIGHUP, in lwp_cond_wait()
/1: siginfo: SIG#0
Please let me know what... (5 Replies)
Discussion started by: Hara Prasad
5 Replies
LEARN ABOUT FREEBSD
truss
TRUSS(1) BSD General Commands Manual TRUSS(1)
NAME
truss -- trace system calls
SYNOPSIS
truss [-facedDS] [-o file] [-s strsize] -p pid
truss [-facedDS] [-o file] [-s strsize] command [args]
DESCRIPTION
The truss utility traces the system calls called by the specified process or program. Output is to the specified output file, or standard
error by default. It does this by stopping and restarting the process being monitored via ptrace(2).
The options are as follows:
-f Trace descendants of the original traced process created by fork(2), vfork(2), etc.
-a Show the argument strings that are passed in each execve(2) system call.
-c Do not display individual system calls. Instead, before exiting, print a summary containing for each system call: the total system
time used, the number of times the call was invoked, and the number of times the call returned with an error.
-e Show the environment strings that are passed in each execve(2) system call.
-d Include timestamps in the output showing the time elapsed since the trace was started.
-D Include timestamps in the output showing the time elapsed since the last recorded event.
-S Do not display information about signals received by the process. (Normally, truss displays signal as well as system call events.)
-o file
Print the output to the specified file instead of standard error.
-s strsize
Display strings using at most strsize characters. If the buffer is larger, ``...'' will be displayed at the end of the string. The
default strsize is 32.
-p pid Follow the process specified by pid instead of a new command.
command [args]
Execute command and trace the system calls of it. (The -p and command options are mutually exclusive.)
EXAMPLES
# Follow the system calls used in echoing "hello"
$ truss /bin/echo hello
# Do the same, but put the output into a file
$ truss -o /tmp/truss.out /bin/echo hello
# Follow an already-running process
$ truss -p 34
SEE ALSO
kdump(1), ktrace(1), ptrace(2)
HISTORY
The truss command was written by Sean Eric Fagan for FreeBSD. It was modeled after similar commands available for System V Release 4 and
SunOS.
BSD
May 12, 2009 BSD