diff options
| -rw-r--r-- | sql/mysqld.cc | 3 | ||||
| -rw-r--r-- | storage/perfschema/pfs_lock.h | 20 | ||||
| -rw-r--r-- | storage/perfschema/unittest/pfs-t.cc | 1 | ||||
| -rw-r--r-- | storage/perfschema/unittest/pfs_instr-oom-t.cc | 1 | ||||
| -rw-r--r-- | storage/perfschema/unittest/pfs_instr-t.cc | 2 | ||||
| -rw-r--r-- | storage/perfschema/unittest/pfs_instr_class-oom-t.cc | 1 | ||||
| -rw-r--r-- | storage/perfschema/unittest/pfs_instr_class-t.cc | 2 | ||||
| -rw-r--r-- | storage/perfschema/unittest/stub_server_misc.h | 21 |
8 files changed, 49 insertions, 2 deletions
diff --git a/sql/mysqld.cc b/sql/mysqld.cc index 04e61635f22..871d9a795af 100644 --- a/sql/mysqld.cc +++ b/sql/mysqld.cc @@ -324,7 +324,8 @@ static PSI_rwlock_key key_rwlock_openssl; /* the default log output is log tables */ static bool lower_case_table_names_used= 0; static bool volatile select_thread_in_use, signal_thread_in_use; -static bool volatile ready_to_exit; +/* See Bug#56666 and Bug#56760 */; +volatile bool ready_to_exit; static my_bool opt_debugging= 0, opt_external_locking= 0, opt_console= 0; static my_bool opt_short_log_format= 0; static uint kill_cached_threads, wake_thread; diff --git a/storage/perfschema/pfs_lock.h b/storage/perfschema/pfs_lock.h index 5c74d3944ba..d253cfa4366 100644 --- a/storage/perfschema/pfs_lock.h +++ b/storage/perfschema/pfs_lock.h @@ -135,7 +135,25 @@ struct pfs_lock */ void allocated_to_free(void) { - DBUG_ASSERT(m_state == PFS_LOCK_ALLOCATED); +#ifndef DBUG_OFF + extern volatile bool ready_to_exit; +#endif + + /* + If this record is not in the ALLOCATED state and the caller is trying + to free it, this is a bug: the caller is confused, + and potentially damaging data owned by another thread or object. + The correct assert to use here to guarantee data integrity is simply: + DBUG_ASSERT(m_state == PFS_LOCK_ALLOCATED); + Now, because of Bug#56666 (Race condition between the server main thread + and the kill server thread), this assert actually fails during shutdown, + and the failure is legitimate, on concurrent calls to mysql_*_destroy(), + when destroying the instrumentation of an object ... twice. + During shutdown this has no consequences for the performance schema, + so the assert is relaxed with the "|| ready_to_exit" condition as a work + around until Bug#56666 is fixed. + */ + DBUG_ASSERT((m_state == PFS_LOCK_ALLOCATED) || ready_to_exit); PFS_atomic::store_32(&m_state, PFS_LOCK_FREE); } diff --git a/storage/perfschema/unittest/pfs-t.cc b/storage/perfschema/unittest/pfs-t.cc index c51f358c4d8..20e736a546f 100644 --- a/storage/perfschema/unittest/pfs-t.cc +++ b/storage/perfschema/unittest/pfs-t.cc @@ -25,6 +25,7 @@ #include <memory.h> #include "stub_print_error.h" +#include "stub_server_misc.h" /* test helpers, to simulate the setup */ diff --git a/storage/perfschema/unittest/pfs_instr-oom-t.cc b/storage/perfschema/unittest/pfs_instr-oom-t.cc index 9a3b179aa56..13335326932 100644 --- a/storage/perfschema/unittest/pfs_instr-oom-t.cc +++ b/storage/perfschema/unittest/pfs_instr-oom-t.cc @@ -21,6 +21,7 @@ #include <tap.h> #include "stub_pfs_global.h" +#include "stub_server_misc.h" void test_oom() { diff --git a/storage/perfschema/unittest/pfs_instr-t.cc b/storage/perfschema/unittest/pfs_instr-t.cc index 7dcc8cec7f8..2ef9a5769ca 100644 --- a/storage/perfschema/unittest/pfs_instr-t.cc +++ b/storage/perfschema/unittest/pfs_instr-t.cc @@ -22,6 +22,8 @@ #include <memory.h> +#include "stub_server_misc.h" + void test_no_instruments() { int rc; diff --git a/storage/perfschema/unittest/pfs_instr_class-oom-t.cc b/storage/perfschema/unittest/pfs_instr_class-oom-t.cc index 20fa0f3e6ff..9ccaf432ba2 100644 --- a/storage/perfschema/unittest/pfs_instr_class-oom-t.cc +++ b/storage/perfschema/unittest/pfs_instr_class-oom-t.cc @@ -20,6 +20,7 @@ #include <tap.h> #include "stub_pfs_global.h" +#include "stub_server_misc.h" void test_oom() { diff --git a/storage/perfschema/unittest/pfs_instr_class-t.cc b/storage/perfschema/unittest/pfs_instr_class-t.cc index c5a199727d5..f9a1ee510b1 100644 --- a/storage/perfschema/unittest/pfs_instr_class-t.cc +++ b/storage/perfschema/unittest/pfs_instr_class-t.cc @@ -21,6 +21,8 @@ #include <pfs_global.h> #include <tap.h> +#include "stub_server_misc.h" + void test_no_registration() { int rc; diff --git a/storage/perfschema/unittest/stub_server_misc.h b/storage/perfschema/unittest/stub_server_misc.h new file mode 100644 index 00000000000..17beadbb104 --- /dev/null +++ b/storage/perfschema/unittest/stub_server_misc.h @@ -0,0 +1,21 @@ +/* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ + +/* + Minimal code to be able to link a unit test. +*/ + +volatile bool ready_to_exit= false; + |