1. 08 Jun, 2010 1 commit
    • sgjesse@chromium.org's avatar
      More precise break points and stepping when debugging · 634fb915
      sgjesse@chromium.org authored
      Added support for more precise break points when debugging and stepping. To achieve that additional nop instructions are inserted where breaking would otherwise be impossible. The number of nop instructions inserted are sufficient to make place for patching with a call to a debug break code stub. On Intel that is 5 nop's for 32-bit and 13 for 64-bit. Om ARM 3 nop instructions (12 bytes) are required.
      
      In order to avoid inserting nop's in to many places a simple ast checker have been added to check whether there are breakable code in a statement or expression. If it is possible to break in an expression no additional break enabeling code is inserted.
      
      Added break locations to the true and false part of a conditional expression.
      
      Added stepping tests to cover more constructs.
      
      These changes are only in the full compiler.
      
      Changed the default value for the option --debugger in teh d8 shell from true to false. The reason for this is that with --debugger turned on the full compiler will be used for all code in when running d8, which can be unexpeceted.
      
      Review URL: http://codereview.chromium.org/2693002
      
      git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4820 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
      634fb915
  2. 27 May, 2010 1 commit
  3. 26 May, 2010 1 commit
  4. 25 May, 2010 1 commit
    • vegorov@chromium.org's avatar
      Cardmarking writebarrier. · 675e711f
      vegorov@chromium.org authored
      - New сardmarking write barrier handles large objects and normal objects in a similar fashion (no more additional space for pointer tracking is required, no conditional branches in WB code).
      - Changes to enable oldspaces iteration without maps decoding:
      -- layout change for FixedArrays: length is stored as a smis (initial patch by
      Kevin Millikin)
      -- layout change for SharedFunctionInfo: integer fields are stored as smi on
      arm, ia32 and rearranged on x64.
      -- layout change for String: meaning of LSB bit is fliped (1 now means hash not
      computed); on x64 padding is added.
      -- layout of maps is _not_ changed. Map space is currently iterated in a special
      way.
      
      Review URL: http://codereview.chromium.org/2144006
      
      git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4715 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
      675e711f
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