An error occurred fetching the project authors.
  1. 01 Oct, 2008 1 commit
    • Ingo Struewing's avatar
      Bug#37958 - test main.plugin crash on Mac OS X when selecting from EXAMPLE engine. · acaf211d
      Ingo Struewing authored
      This patch contains fixes for two problems:
      
      1. As originally reported, the server crashed on Mac OS X when trying to access
         an EXAMPLE table after the EXAMPLE plugin was installed.
      
         It turned out that the dynamically loaded EXAMPLE plugin called the
         function hash_earch() from a Mac OS X system library, instead of
         hash_earch() from MySQL's mysys library. Makefile.am in storage/example
         does not include libmysys. So the Mac OS X linker arranged the hash_search()
         function to be linked to the system library when the shared object is
         loaded.
      
         One possible solution would be to include libmysys into the linkage of
         dynamic plugins. But then we must have a libmysys.so, which must be
         used by the server too. This could have a minimal performance impact,
         but foremost the change seems to bee too risky at the current state of
         MySQL 5.1.
      
         The selected solution is to rename MySQL's hash_search() to my_hash_search()
         like it has been done before with hash_insert() and hash_reset().
      
         Since this is the third time, we need to rename a hash_*() function,
         I did renamed all hash_*() functions to my_hash_*().
      
         To avoid changing a zillion calls to these functions, and announcing
         this to hundreds of developers, I added defines that map the old names
         to the new names.
      
         This change is in hash.h and hash.c.
      
      2. The other problem was improper implementation of the handlerton-to-plugin
         mapping. We use a fixed-size array to hold a plugin reference for each
         handlerton. On every install of a handler plugin, we allocated a new slot
         of the array. On uninstall we did not free it. After some uninstall/install
         cycles the array overflowed. We did not check for overflow.
      
         One fix is to check for overflow to stop the crashes.
      
         Another fix is to free the array slot at uninstall and search for a free slot
         at plugin install.
      
         This change is in handler.cc.
      acaf211d
  2. 18 Mar, 2008 1 commit
    • thek@adventure.(none)'s avatar
      Bug#25175 Too much memory used by MySQL grant system · cee1b1fd
      thek@adventure.(none) authored
      Each time the server reloads privileges containing table grants, the 
      system will allocate too much memory than needed because of badly
      chosen growth prediction in the underlying dynamic arrays.
      
      This patch introduces a new signature to the hash container initializer
      which enables a much more pessimistic approach in favour for more
      efficient memory useage.
      
      This patch was supplied by Google Inc.
      cee1b1fd
  3. 10 May, 2007 1 commit
    • monty@mysql.com/narttu.mysql.fi's avatar
      WL#3817: Simplify string / memory area types and make things more consistent (first part) · 088e2395
      monty@mysql.com/narttu.mysql.fi authored
      The following type conversions was done:
      
      - Changed byte to uchar
      - Changed gptr to uchar*
      - Change my_string to char *
      - Change my_size_t to size_t
      - Change size_s to size_t
      
      Removed declaration of byte, gptr, my_string, my_size_t and size_s. 
      
      Following function parameter changes was done:
      - All string functions in mysys/strings was changed to use size_t
        instead of uint for string lengths.
      - All read()/write() functions changed to use size_t (including vio).
      - All protocoll functions changed to use size_t instead of uint
      - Functions that used a pointer to a string length was changed to use size_t*
      - Changed malloc(), free() and related functions from using gptr to use void *
        as this requires fewer casts in the code and is more in line with how the
        standard functions work.
      - Added extra length argument to dirname_part() to return the length of the
        created string.
      - Changed (at least) following functions to take uchar* as argument:
        - db_dump()
        - my_net_write()
        - net_write_command()
        - net_store_data()
        - DBUG_DUMP()
        - decimal2bin() & bin2decimal()
      - Changed my_compress() and my_uncompress() to use size_t. Changed one
        argument to my_uncompress() from a pointer to a value as we only return
        one value (makes function easier to use).
      - Changed type of 'pack_data' argument to packfrm() to avoid casts.
      - Changed in readfrm() and writefrom(), ha_discover and handler::discover()
        the type for argument 'frmdata' to uchar** to avoid casts.
      - Changed most Field functions to use uchar* instead of char* (reduced a lot of
        casts).
      - Changed field->val_xxx(xxx, new_ptr) to take const pointers.
      
      Other changes:
      - Removed a lot of not needed casts
      - Added a few new cast required by other changes
      - Added some cast to my_multi_malloc() arguments for safety (as string lengths
        needs to be uint, not size_t).
      - Fixed all calls to hash-get-key functions to use size_t*. (Needed to be done
        explicitely as this conflict was often hided by casting the function to
        hash_get_key).
      - Changed some buffers to memory regions to uchar* to avoid casts.
      - Changed some string lengths from uint to size_t.
      - Changed field->ptr to be uchar* instead of char*. This allowed us to
        get rid of a lot of casts.
      - Some changes from true -> TRUE, false -> FALSE, unsigned char -> uchar
      - Include zlib.h in some files as we needed declaration of crc32()
      - Changed MY_FILE_ERROR to be (size_t) -1.
      - Changed many variables to hold the result of my_read() / my_write() to be
        size_t. This was needed to properly detect errors (which are
        returned as (size_t) -1).
      - Removed some very old VMS code
      - Changed packfrm()/unpackfrm() to not be depending on uint size
        (portability fix)
      - Removed windows specific code to restore cursor position as this
        causes slowdown on windows and we should not mix read() and pread()
        calls anyway as this is not thread safe. Updated function comment to
        reflect this. Changed function that depended on original behavior of
        my_pwrite() to itself restore the cursor position (one such case).
      - Added some missing checking of return value of malloc().
      - Changed definition of MOD_PAD_CHAR_TO_FULL_LENGTH to avoid 'long' overflow.
      - Changed type of table_def::m_size from my_size_t to ulong to reflect that
        m_size is the number of elements in the array, not a string/memory
        length.
      - Moved THD::max_row_length() to table.cc (as it's not depending on THD).
        Inlined max_row_length_blob() into this function.
      - More function comments
      - Fixed some compiler warnings when compiled without partitions.
      - Removed setting of LEX_STRING() arguments in declaration (portability fix).
      - Some trivial indentation/variable name changes.
      - Some trivial code simplifications:
        - Replaced some calls to alloc_root + memcpy to use
          strmake_root()/strdup_root().
        - Changed some calls from memdup() to strmake() (Safety fix)
        - Simpler loops in client-simple.c
      088e2395
  4. 02 Mar, 2007 1 commit
    • antony@ppcg5.local's avatar
      WL#2936 · dc24473c
      antony@ppcg5.local authored
        "Server Variables for Plugins"
        Implement support for plugins to declare server variables.
        Demonstrate functionality by removing InnoDB specific code from sql/*
        New feature for HASH - HASH_UNIQUE flag
        New feature for DYNAMIC_ARRAY - initializer accepts preallocated ptr.
        Completed support for plugin reference counting.
      dc24473c
  5. 23 Dec, 2006 1 commit
  6. 01 Nov, 2006 1 commit
  7. 04 Jan, 2006 1 commit
    • konstantin@mysql.com's avatar
      A fix for Bug#7209 "Client error with "Access Denied" on updates · f7d6fa6f
      konstantin@mysql.com authored
      when high concurrency": remove HASH::current_record and make it
      an external search parameter, so that it can not be the cause of a 
      race condition under high concurrent load.
      The bug was in a race condition in table_hash_search,
      when column_priv_hash.current_record was overwritten simultaneously
      by multiple threads, causing the search for a suitable grant record
      to fail.
      No test case as the bug is repeatable only under concurrent load.
      f7d6fa6f
  8. 11 Jan, 2005 1 commit
  9. 07 Oct, 2004 1 commit
    • monty@mysql.com's avatar
      After merge fixes · 6239edc1
      monty@mysql.com authored
      Some bigger code changes was necessary becasue of the multi-table-update and the new HANDLER code
      6239edc1
  10. 22 Sep, 2004 1 commit
  11. 20 Nov, 2003 1 commit
  12. 19 Sep, 2003 1 commit
    • hf@deer.(none)'s avatar
      SCRUM · a2dbfaef
      hf@deer.(none) authored
      embedded library
      hash_insert renamed to my_hash_insert to avoid name intersection
      with another libraries
      is there better idea?
      a2dbfaef
  13. 01 Apr, 2003 1 commit
  14. 16 Apr, 2002 1 commit
  15. 14 Mar, 2002 1 commit
  16. 22 Jan, 2002 1 commit
  17. 06 Dec, 2001 1 commit
  18. 05 Dec, 2001 1 commit
    • monty@hundin.mysql.fi's avatar
      Update of query cache code. · 1de4fff5
      monty@hundin.mysql.fi authored
      Changed some sql_alloc() -> thd->alloc()
      Removed a lot of compiler warnings on Linux Alpha (64 bit)
      Fixed some core dumps on 64 bit systems (wrong type for packet_len)
      1de4fff5
  19. 31 Jul, 2000 1 commit