Bug #86508 TSAN: data race in cleanup_instruments
Submitted: 30 May 2017 12:14 Modified: 1 Jun 2017 14:54
Reporter: Tor Didriksen Email Updates:
Status: Closed Impact on me:
None 
Category:MySQL Server: Compiling Severity:S3 (Non-critical)
Version:8.0.2 OS:Any
Assigned to: CPU Architecture:Any

[30 May 2017 12:14] Tor Didriksen 
Description:
WARNING: ThreadSanitizer: data race (pid=3232)
  Write of size 8 at 0x0000037030c8 by main thread:
    #0 cleanup_instruments() ../storage/perfschema/pfs_instr.cc:289 (mysqld+0x00000225167a)
    #1 cleanup_performance_schema ../storage/perfschema/pfs_server.cc:306 (mysqld+0x00000226e0d4)
    #2 shutdown_performance_schema() ../storage/perfschema/pfs_server.cc:338 (mysqld+0x00000226ebc2)
    #3 mysqld_exit ../sql/mysqld.cc:1795 (mysqld+0x0000008cd81f)
    #4 mysqld_main(int, char**) ../sql/mysqld.cc:5963 (mysqld+0x0000008e79d9)
    #5 main ../sql/main.cc:25 (mysqld+0x0000008cc474)

How to repeat:
cmake .. -DWITH_RAPID=0 -DWITH_DEBUG=1 -DWITH_TSAN=1

./mtr --mem --sanitize main.1st

Suggested fix:
Use std::atomic<pointer> rather than raw pointer
[1 Jun 2017 14:54] Paul DuBois 
Posted by developer:
 
Fixed in 8.0.2.

Code cleanup. No changelog entry needed.