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Date: Sun, 26 Oct 2008 09:15:42 -0400 From: fche@...hat.com (Frank Ch. Eigler) To: =?ISO-8859-1?Q?Fr=E9d=E9ric_Weisbecker?= <fweisbec@...il.com> Cc: =?ISO-8859-1?Q?T=F6r=F6k_Edwin?= <edwintorok@...il.com>, mingo@...e.hu, srostedt@...hat.com, a.p.zijlstra@...llo.nl, sandmann@...mi.au.dk, linux-kernel@...r.kernel.org Subject: Re: [PATCH 1/4] Add support for userspace stacktraces in tracing/iter_ctrl "=?ISO-8859-1?Q?Fr=E9d=E9ric_Weisbecker?=" <fweisbec@...il.com> writes: > [...] >> +/* Userspace stacktrace - based on kernel/trace/trace_sysprof.c */ >> + >> +struct stack_frame { >> + const void __user *next_fp; >> + unsigned long return_address; >> +}; > [...] To what extent does this actually work, and on which architectures? While the kernel appears willing to sacrifice some performance for functionality by building with frame pointers at the drop of a tracing hat, userspace is not like that. - FChE -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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