Messages in this thread | | | Date | Thu, 12 Apr 2012 20:19:27 +0530 | From | Srikar Dronamraju <> | Subject | Re: [PATCH UPDATED 3/3] tracing: Provide trace events interface for uprobes |
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> > + > > + # echo 'p /bin/zsh:0x46420 %ip %ax' > uprobe_events > > + > > +Please note: User has to explicitly calculate the offset of the probepoint > > +in the object. We can see the events that are registered by looking at the > > +uprobe_events file. > > + > > + # cat uprobe_events > > + p:uprobes/p_zsh_0x46420 /bin/zsh:0x0000000000046420 > > Doesn't uprobe_events show the arguments of existing events? > And also, could you add an event format of above event here? >
[root@f14kvm tracing]# cat uprobe_events [root@f14kvm tracing]# echo 'p /bin/zsh:0x46420 %ip %ax' > uprobe_events [root@f14kvm tracing]# cat uprobe_events p:uprobes/p_zsh_0x46420 /bin/zsh:0x00046420 arg1=%ip arg2=%ax [root@f14kvm tracing]# cat events/uprobes/p_zsh_0x46420/format name: p_zsh_0x46420 ID: 922 format: field:unsigned short common_type; offset:0; size:2; signed:0; field:unsigned char common_flags; offset:2; size:1; signed:0; field:unsigned char common_preempt_count; offset:3; size:1; signed:0; field:int common_pid; offset:4; size:4; signed:1; field:int common_padding; offset:8; size:4; signed:1;
field:unsigned long __probe_ip; offset:12; size:4; signed:0; field:u32 arg1; offset:16; size:4; signed:0; field:u32 arg2; offset:20; size:4; signed:0;
print fmt: "(%lx) arg1=%lx arg2=%lx", REC->__probe_ip, REC->arg1, REC->arg2 [root@f14kvm tracing]#
Will update the Documentation file with correct output of "cat uprobe_events". Do you want the format file to be added to the Documentation?
-- Thanks and Regards Srikar
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