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author | Nirbhay Choubey <nirbhay@mariadb.com> | 2015-11-06 14:38:03 -0500 |
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committer | Nirbhay Choubey <nirbhay@mariadb.com> | 2015-11-06 14:38:03 -0500 |
commit | 0a03bd1f043861be5bafa5b0cdff72995fac61d5 (patch) | |
tree | de4b8471de506e74e4951a5559b11b7cf378d1eb /sql-bench | |
parent | 8a09280dc17c40c398c4c023108d70395b1ba0b6 (diff) | |
download | mariadb-git-0a03bd1f043861be5bafa5b0cdff72995fac61d5.tar.gz |
MDEV-9021: MYSQLD SEGFAULTS WHEN BUILT USING --WITH-MAX-INDEXES=128
The bitmap implementation defines two template Bitmap classes. One
optimized for 64-bit (default) wide bitmaps while the other is used for
all other widths.
In order to optimize the computations, Bitmap<64> class has defined its
own member functions for bitmap operations, the other one, however,
relies on mysys' bitmap implementation (mysys/my_bitmap.c).
Issue 1:
In case of non 64-bit Bitmap class, intersect() wrongly reset the
received bitmap while initialising a new local bitmap structure
(bitmap_init() clears the bitmap buffer) thus, the received bitmap was
getting cleared.
Fixed by initializing the local bitmap structure by using a temporary
buffer and later copying the received bitmap to the initialised bitmap
structure.
Issue 2:
The non 64-bit Bitmap class had the Iterator missing which caused
compilation failure.
Also added a cmake variable to hold the MAX_INDEXES value when supplied
from the command prompt. (eg. cmake .. -DMAX_INDEXES=128U). Checks have
been put in place to trigger build failure if MAX_INDEXES value is
greater than 128.
Test modifications:
* Introduced include/have_max_indexes_[64|128].inc to facilitate
skipping of tests for which the output differs with different
MAX_INDEXES.
* Introduced include/max_indexes.inc which would get modified by cmake
to reflect the MAX_INDEXES value used to build the server. This file
simply sets an mtr variable '$max_indexes' to show the MAX_INDEXES
value, which will then be consumed by the above introduced include file.
* Some tests (portions), dependent on MAX_INDEXES value, have been moved
to separate test files.
Diffstat (limited to 'sql-bench')
0 files changed, 0 insertions, 0 deletions