Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-35494

fil_space_t::fil_space_t() is potentially unsafe with GCC -flifetime-dse

Details

    Description

      Starting with MDEV-8139, fil_space_t is no longer trivially constructible. In fil_space_t::create(), the object is being constructed using the following antipattern:

      	/* FIXME: if calloc() is defined as an inline function that calls
      		 
      	memset() or bzero(), then GCC 6 -flifetime-dse can optimize it away */
      		 
      	*after = space = new (ut_zalloc_nokey(sizeof(*space))) fil_space_t;
      		 
       
      		 
      	space->id = id;
      		 
       
      		 
      	UT_LIST_INIT(space->chain, &fil_node_t::chain);
      		 
       
      		 
      	space->purpose = purpose;
      		 
      	space->flags = flags;

      This needs to be refactored to an explicit fil_space_t::fil_space_t(), which will initialize all data fields, something like the following:

      *after = space = new (ut_malloc_nokey(*space)) fil_space_t(id, flags, purpose, crypt_data, mode);

      The fil_space_t::latch member will need some special care, because outside SUX_LOCK_GENERIC the implementation expects that the object be zero-initialized.

      Attachments

        Issue Links

          is caused by

          Bug - A problem which impairs or prevents the functions of the product. MDEV-8139 Fix scrubbing

          • Major - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-18749 rec_get_converted_size_comp_prefix_low: Conditional jump or move depends on uninitialised value upon adding FULLTEXT index

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-34625 MariaDB server crashes in 10.11.8 due to using uninitialized member variables

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-35472 Server crash in ha_storage_put_memlim upon reading from INNODB_LOCKS

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-35618 Bogus assertion failure 'recv_sys.scanned_lsn < max_lsn + 32 * 512U' during recovery

          • Major - Major loss of function.
          • Closed

          Activity

            People

              marko Marko Mäkelä
              marko Marko Mäkelä
              Votes:
              0 Vote for this issue
              Watchers:
              3 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Git Integration

                  Error rendering 'com.xiplink.jira.git.jira_git_plugin:git-issue-webpanel'. Please contact your Jira administrators.