[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-0.9.9-190-g5441749

[jistone at sourceware dot org]

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- Log -----------------------------------------------------------------
commit 544174947817538d15a105fe2de4f2094079fd6c
Author: Josh Stone <jistone@redhat.com>
Date:   Tue Aug 25 18:53:40 2009 -0700

    Compute cu_name dynamically
    
    We only need cu_name for errors and verbose messages, so it's a waste to
    always construct it in focus_on_cu.  It's now built only as-needed.
    
    * dwflpp.cxx (dwflpp::cu_name): Now a method instead of a data member.
      (dwflpp::focus_on_module): No cu_name to clear now.
      (dwflpp::focus_on_cu): No cu_name to set now.
      (dwflpp::declaration_resolve): Adjust to call cu_name() now.
      (dwflpp::iterate_over_functions): Ditto.
    * tapsets.cxx (query_cu): Ditto.

commit c1c5bb9a8bd0a58f98708f949e4dbe74561898a7
Author: Josh Stone <jistone@redhat.com>
Date:   Tue Aug 25 18:20:39 2009 -0700

    Avoid needless Dwarf_Die copying
    
    * dwflpp.cxx (dwflpp::iterate_over_cus): Use the Dwarf_Die as a
      pointer directly into the vector.
      (dwflpp::iterate_over_inline_instances): Ditto.
      (dwflpp::iterate_over_functions): Ditto in a map.

commit be53d3135d2f22032917b0da19a2f9783d3f2705
Author: Josh Stone <jistone@redhat.com>
Date:   Tue Aug 25 17:42:55 2009 -0700

    Convert module_cu_cache_t to a stap_map
    
    * dwflpp.cxx (module_cu_cache_t): Typedef as a stap_map instead.

commit d089f5b2932a473692f8c3e1badb883fabc55dee
Author: Josh Stone <jistone@redhat.com>
Date:   Tue Aug 25 17:23:28 2009 -0700

    Index cu_inl_function_cache_t by function->addr
    
    Again, avoid needless string construction for map indexing.
    
    * dwflpp.h (cu_inl_function_cache_t): Index by the void* function->addr.
    * dwflpp.cxx (dwflpp::iterate_over_inline_instances): Index
      cu_inl_function_cache by function->addr.

commit 54558065ee8428cfdc42135f151739fbc787d034
Author: Josh Stone <jistone@redhat.com>
Date:   Tue Aug 25 16:58:20 2009 -0700

    Index mod_cu_function_cache_t by cu->addr
    
    Rather than constructing a "module:cu" string all the time, we can just
    index the cache by the cu die's addr field.  The addr will never change
    as long as the Dwarf object is still alive.
    
    This has a quite noticeable performance impact for scripts that iterate
    over lots of cus (like for syscall.*).
    
    * dwflpp.h (stap_map): Allow void* keys too.
      (mod_cu_function_cache_t): Index by the void* cu->addr.
    * dwflpp.cxx (dwflpp::iterate_over_functions): Index cu_function_cache
      by addr, and build the verbose strings manually when needed.
      (dwflpp::declaration_resolve): Index global_alias_cache by addr.

-----------------------------------------------------------------------

Summary of changes:
 dwflpp.cxx  |   62 ++++++++++++++++++++++++++++++----------------------------
 dwflpp.h    |   31 ++++++++++++++++++++---------
 tapsets.cxx |    4 +-
 3 files changed, 55 insertions(+), 42 deletions(-)


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