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    • mikhail.naganov@gmail.com's avatar
      Fix CPU profiling for Crankshaft. · 56788625
      mikhail.naganov@gmail.com authored
      The main issue was due to multiple recompilations of functions.  Now
      code objects are grouped by function using SFI object address.
      JSFunction objects are no longer tracked, instead we track SFI object
      moves. To pick a correct code version, we now sample return addresses
      instead of JSFunction addresses.
      
      tools/{linux|mac|windows}-tickprocessor scripts differentiate
      between code optimization states for the same function
      (using * and ~ prefixes introduced earlier).
      
      DevTools CPU profiler treats all variants of function code as
      a single function.
      
      ll_prof treats each optimized variant as a separate entry, because
      it can disassemble each one of them.
      
      tickprocessor.py not updated -- it is deprecated and will be removed.
      
      BUG=v8/1087,b/3178160
      TEST=all existing tests pass, including Chromium layout tests
      
      Review URL: http://codereview.chromium.org/6551011
      
      git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6902 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
      56788625