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tracing/kprobes: Support soft-mode disabling
Support soft-mode disabling on kprobe-based dynamic events. Soft-disabling is just ignoring recording if the soft disabled flag is set. Link: http://lkml.kernel.org/r/20130509054454.30398.7237.stgit@mhiramat-M0-7522 Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Tom Zanussi <tom.zanussi@intel.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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1 changed files with 6 additions and 0 deletions
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@ -845,6 +845,9 @@ __kprobe_trace_func(struct trace_probe *tp, struct pt_regs *regs,
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WARN_ON(call != ftrace_file->event_call);
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WARN_ON(call != ftrace_file->event_call);
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if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, &ftrace_file->flags))
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return;
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local_save_flags(irq_flags);
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local_save_flags(irq_flags);
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pc = preempt_count();
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pc = preempt_count();
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@ -893,6 +896,9 @@ __kretprobe_trace_func(struct trace_probe *tp, struct kretprobe_instance *ri,
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WARN_ON(call != ftrace_file->event_call);
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WARN_ON(call != ftrace_file->event_call);
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if (test_bit(FTRACE_EVENT_FL_SOFT_DISABLED_BIT, &ftrace_file->flags))
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return;
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local_save_flags(irq_flags);
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local_save_flags(irq_flags);
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pc = preempt_count();
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pc = preempt_count();
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