C program generate log on runtime

Question

I have a program which takes a lot of time to crash.

Is it possible to run the program and trace what is happening into a file, like trus does?

What's wrong with truss? On Linux, you have strace, if it's not available. — Dan Fego
– Dan Fego, Commented Jan 12, 2012 at 15:57
Uh, use truss (Solaris & others) or strace (Linux) just like you said? What's your question? — Celada
– Celada, Commented Jan 12, 2012 at 15:57
Or just wait till it crashes and analyse the core file (gdb on Linux / BSD, DRWatson on MSWindows) — symcbean
– symcbean, Commented Jan 12, 2012 at 15:59
i have the source, thanks, i'll try the strace.. the program is huge and it runs for 8 - 10 days until it crashes. — Lefsler
– Lefsler, Commented Jan 12, 2012 at 16:11

unwind · Accepted Answer · 2012-01-12 15:56:48Z

2

"It depends".

If the program is doing a lot of system calls, like being very I/O intensive, you can probably glean something useful from running it through strace. Otherwise, you might want to try profiling it and inspecting the profile. Note that profiling often requires that you are able to re-build the program to add the profiling instrumentation code.

answered Jan 12, 2012 at 15:56

unwind

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