[PATCH] instruction tracing probe

[Dave Nomura <dcnltc at us dot ibm dot com>]

This patch set implements user space instruction tracing by the 
following itrace probe:
       probe process(PID_OR_NAME).itrace [ if (<condition>) ]
       {
               // instr tracing code
       }
where the <condition> is used to turn tracing on and off using user 
probes like:
       probe process(<PID>).statement(<instr_addr>).absolute
       {
               some_condition_variable = 1
       }

       probe process(<PID>).statement(<instr_addr>).absolute.return
       {
               some_condition_variable = 0
       }

The implementation is based on the utrace capability of handling the 
single step
trap. A btrace probe could easily be added when utrace supports block 
stepping.

--
Dave Nomura
LTC Linux Power Toolchain

Attachment: itrace.patch.gz
Description: application/gzip