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bb036c93b4
strict aliasing violations. Essentially, the problem is that large parts of the server were developed in simpler times (last decades, pre C99 standard) when strict aliasing and compilers supporting such optimizations were rare to non-existent. Thus, when compiling the server with a modern compiler that uses strict aliasing rules to perform optimizations, there are several places in the code that might trigger undefined behavior. As evinced by some recent bugs, GCC does a somewhat good of job misoptimizing such code, but on the other hand also gives warnings about suspicious code. One problem is that the warnings aren't always accurate, yet we can't afford to just shut them off as we might miss real cases. False-positive cases are aggravated mostly by casts that are likely to trigger undefined behavior. The solution is to start a cleanup process focused on fixing and reducing the amount of strict-aliasing related warnings produced by GCC and others compilers. A good deal of noise reduction can be achieved by just removing useless casts that are product of historical cruft and are likely to trigger undefined behavior if dereferenced. |
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| .. | ||
| .cvsignore | ||
| auto_increment.res | ||
| auto_increment.tst | ||
| big_record.pl | ||
| bug25714.c | ||
| CMakeLists.txt | ||
| connect_test.c | ||
| deadlock_test.c | ||
| drop_test.pl | ||
| export.pl | ||
| fork2_test.pl | ||
| fork_big.pl | ||
| fork_big2.pl | ||
| function.res | ||
| function.tst | ||
| grant.pl | ||
| grant.res | ||
| index_corrupt.pl | ||
| insert_and_repair.pl | ||
| insert_test.c | ||
| list_test.c | ||
| lock_test.pl | ||
| lock_test.res | ||
| mail_to_db.pl | ||
| Makefile.am | ||
| myisam-big-rows.tst | ||
| mysql_client_test.c | ||
| pmail.pl | ||
| rename_test.pl | ||
| restore-lock.smack | ||
| select_test.c | ||
| showdb_test.c | ||
| ssl_test.c | ||
| table_types.pl | ||
| test_delayed_insert.pl | ||
| thread_test.c | ||
| truncate.pl | ||