Your message dated Thu, 5 Jul 2007 12:56:37 -0700 (PDT)
with message-id <[EMAIL PROTECTED]>
and subject line Bug#365105: strace: no output from tracing multi-threaded app
without -f option
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--- Begin Message ---
Package: strace
Version: 4.5.14-1
Severity: normal
It would seem that unless one adds -f to the strace command line, tracing
a multi-threaded program will show nothing. At least when that multi-threaded
program (in this case named 9.3.2 from isc.org) has a main thread that does
nothing while the rest of the threads do work. So one has to do:
strace -f -p <pid>
rather than the intuitive (?)
strace -p <pid>
similarly, if one just wants counts:
strace -c <pid>
does not seem to work in this case.
the strace manpage only talks about following forks in regards to the -f
option, it makes no mention of threads.
-- System Information:
Debian Release: testing/unstable
APT prefers testing
APT policy: (500, 'testing')
Architecture: ia64
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.15-1-mckinley-smp
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Versions of packages strace depends on:
ii libc6.1 2.3.6-6 GNU C Library: Shared libraries
strace recommends no packages.
-- no debconf information
--- End Message ---
--- Begin Message ---
This is not a bug.
--- End Message ---
