Messages in this thread | | | Date | Tue, 21 Jul 2009 09:11:53 +0200 | Subject | Re: [RFC][PATCH 5/5] perfcounter: Add support for kernel hardware breakpoints | From | Frédéric Weisbecker <> |
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2009/7/20, Peter Zijlstra <a.p.zijlstra@chello.nl>: > On Mon, 2009-07-20 at 13:08 -0400, Frederic Weisbecker wrote: >> This adds the support for kernel hardware breakpoints in perfcounter. >> It is added as a new type of software counter and can be defined by >> using the counter number 5 and by passsing the address of the >> breakpoint to set through the config attribute. > > >> +void bp_perf_triggered(struct hw_breakpoint *bp, struct pt_regs *regs) >> +{ >> + unsigned long target = hw_breakpoint_addr(bp); >> + >> + struct perf_sample_data data = { >> + .regs = regs, >> + .addr = instruction_pointer(regs), >> + }; >> + >> + do_perf_swcounter_event(PERF_TYPE_BREAKPOINT, target, 1, 0, &data); >> +} > > .addr would be an associated data address, like for pagefaults and > cache-misses have, its not the RIP of the faulting ins.
Ah ok, then I'll set the actual data memory address that is breakpointed.
Thanks.
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