cvs commit: src/usr.bin/truss Makefile amd64-fbsd.c extern.h i386-fbsd.c i386-linux.c ia64-fbsd.c main.c powerpc-fbsd.c setup.c sparc64-fbsd.c syscall.h syscalls.c truss.1 truss.h

[Alfred Perlstein]

* Ed Maste <ed.maste at gmail.com> [070410 12:47] wrote:
> On 10/04/07, Xin LI <delphij at freebsd.org> wrote:
> >  Make use of ptrace(2) instead of procfs in truss(1), eliminating
> >  yet another need of an available /proc/ mount.
> 
> I've started to do the same thing to gcore(1), in order to make it
> work properly with threaded applications.  I've removed its dependency
> on /proc/pid/mem, /proc/pid/regs, and /proc/pid/fpregs.  However, it
> still relies on /proc/pid/status and /proc/pid/map which are not
> directly available via ptrace(2).
> 
> This would make the -s option to gcore redundant (since the process
> will be stopped after attaching anyway).  I don't know how useful a
> core from a non-stopped process is, anyhow.

Very, very useful.

Imagine a running program that's having some form of abnormal
behavior but can't be stopped (for long) or allowed to core...

-- 
- Alfred Perlstein