On Tue, 2009-04-07 at 01:06 +0400, Fedor Sakharov wrote: > Hello! > Is it possible to use utrace to breakpoint user-spase tasks as it is in > the case of ptrace? And if it is, what is the possible way to do it? > > Fedor Sakharov >
Uprobes does exactly that. It's been around for a couple of years, and this past summer SystemTap was enhanced to exploit uprobes to do user-space tracing. SystemTap is the easiest way to use uprobes, but if you're into bare-knuckles instrumentation modules, the API is: [un]register_u[ret]probe(struct u[ret]probe*) Uprobes is a client of utrace. It's been tucked into the SystemTap runtime (runtime/uprobes[2]) since October 2007, but for various reasons (LONG story) it hasn't debuted on LKML yet. The uprobes API is documented in the SystemTap source: runtime/uprobes/uprobes.txt. Jim Keniston
