Move debug_crash_here to it's own source files

14 files changed, 151 insertions, 102 deletions

diff --git a/libmysqld/CMakeLists.txt b/libmysqld/CMakeLists.txt
index 447817999c9..e74a6fbc6c2 100644
--- a/libmysqld/CMakeLists.txt
+++ b/libmysqld/CMakeLists.txt
@@ -78,7 +78,8 @@ SET(SQL_EMBEDDED_SOURCES emb_qcache.cc libmysqld.c lib_sql.cc
            ../sql/sql_binlog.cc ../sql/sql_manager.cc
            ../sql/sql_parse.cc ../sql/sql_bootstrap.cc
            ../sql/sql_partition.cc ../sql/sql_plugin.cc 
-           ../sql/debug_sync.cc ../sql/opt_table_elimination.cc
+           ../sql/debug_sync.cc ../sql/debug.cc
+           ../sql/opt_table_elimination.cc
            ../sql/sql_prepare.cc ../sql/sql_rename.cc ../sql/sql_repl.cc 
            ../sql/sql_select.cc ../sql/sql_servers.cc
            ../sql/group_by_handler.cc ../sql/derived_handler.cc
diff --git a/sql/CMakeLists.txt b/sql/CMakeLists.txt
index 118971cd02b..5e6153202f7 100644
--- a/sql/CMakeLists.txt
+++ b/sql/CMakeLists.txt
@@ -117,7 +117,7 @@ SET (SQL_SOURCE
                sql_list.cc sql_load.cc sql_manager.cc
                sql_parse.cc sql_bootstrap.cc
                sql_partition.cc sql_plugin.cc sql_prepare.cc sql_rename.cc 
-               debug_sync.cc
+               debug_sync.cc debug.cc
                sql_repl.cc sql_select.cc sql_show.cc sql_state.c
                group_by_handler.cc derived_handler.cc select_handler.cc
                sql_statistics.cc sql_string.cc lex_string.h
diff --git a/sql/debug.cc b/sql/debug.cc
new file mode 100644
index 00000000000..a0e2340e254
--- /dev/null
+++ b/sql/debug.cc
@@ -0,0 +1,88 @@
+/* Copyright (c) 2021, MariaDB Corporation.
+
+   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,
+   51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
+
+#include "mariadb.h"
+#include "sql_class.h"
+#include "debug.h"
+
+/**
+   Debug utility to do crash after a set number of executions
+
+   The user variable, either @debug_crash_counter or @debug_error_counter,
+   is decremented each time debug_crash() or debug_simulate_error is called
+   if the keyword is set with @@debug_push, like
+   @@debug_push="d+frm_data_type_info_emulate"
+
+   If the variable is not set or is not an integer it will be ignored.
+*/
+
+#ifndef DBUG_OFF
+
+static const LEX_CSTRING debug_crash_counter=
+{ STRING_WITH_LEN("debug_crash_counter") };
+static const LEX_CSTRING debug_error_counter=
+{ STRING_WITH_LEN("debug_error_counter") };
+
+static bool debug_decrement_counter(const LEX_CSTRING *name)
+{
+  THD *thd= current_thd;
+  user_var_entry *entry= (user_var_entry*)
+    my_hash_search(&thd->user_vars, (uchar*) name->str, name->length);
+  if (!entry || entry->type != INT_RESULT || ! entry->value)
+    return 0;
+  (*(ulonglong*) entry->value)= (*(ulonglong*) entry->value)-1;
+  return !*(ulonglong*) entry->value;
+}
+
+void debug_crash_here(const char *keyword)
+{
+  DBUG_ENTER("debug_crash_here");
+  DBUG_PRINT("enter", ("keyword: %s", keyword));
+
+  DBUG_EXECUTE_IF(keyword,
+                  if (debug_decrement_counter(&debug_crash_counter))
+                  {
+                    my_printf_error(ER_INTERNAL_ERROR,
+                                    "Crashing at %s",
+                                    MYF(ME_ERROR_LOG | ME_NOTE), keyword);
+                    DBUG_SUICIDE();
+                  });
+  DBUG_VOID_RETURN;
+}
+
+/*
+  This can be used as debug_counter to simulate an error at a specific
+  position.
+
+  Typical usage would be
+  if (debug_simualte_error("keyword"))
+    error= 1;
+*/
+
+bool debug_simulate_error(const char *keyword, uint error)
+{
+  DBUG_ENTER("debug_crash_here");
+  DBUG_PRINT("enter", ("keyword: %s", keyword));
+  DBUG_EXECUTE_IF(keyword,
+                  if (debug_decrement_counter(&debug_error_counter))
+                  {
+                    my_printf_error(error,
+                                    "Simulating error for '%s'",
+                                    MYF(ME_ERROR_LOG), keyword);
+                    DBUG_RETURN(1);
+                  });
+  DBUG_RETURN(0);
+}
+#endif /* DBUG_OFF */
diff --git a/sql/debug.h b/sql/debug.h
new file mode 100644
index 00000000000..48bae774625
--- /dev/null
+++ b/sql/debug.h
@@ -0,0 +1,39 @@
+#ifndef DEBUG_INCLUDED
+#define DEBUG_INCLUDED
+
+/* Copyright (c) 2021, MariaDB Corporation
+
+   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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA */
+
+/**
+  @file
+
+  Declarations for debug_crash_here and other future mariadb server debug
+  functionality.
+*/
+
+/* debug_crash_here() functionallity.
+ See mysql_test/suite/atomic/create_table.test for an example of how it
+ can be used
+*/
+
+#ifndef DBUG_OFF
+void debug_crash_here(const char *keyword);
+bool debug_simulate_error(const char *keyword, uint error);
+#else
+#define debug_crash_here(A) do { } while(0)
+#define debug_simulate_error(A, B) 0
+#endif
+
+#endif /* DEBUG_INCLUDED */
diff --git a/sql/debug_sync.cc b/sql/debug_sync.cc
index f523e22f6ce..1fbb15592a4 100644
--- a/sql/debug_sync.cc
+++ b/sql/debug_sync.cc
@@ -1628,74 +1628,3 @@ bool debug_sync_set_action(THD *thd, const char *action_str, size_t len)
 /* prevent linker/lib warning about file without public symbols */
 int debug_sync_dummy; 
 #endif /* defined(ENABLED_DEBUG_SYNC) */
-
-
-/**
-   Debug utility to do crash after a set number of executions
-
-   The user variable, either @debug_crash_counter or @debug_error_counter,
-   is decremented each time debug_crash() or debug_simulate_error is called
-   if the keyword is set with @@debug_push, like
-   @@debug_push="d+frm_data_type_info_emulate"
-
-   If the variable is not set or is not an integer it will be ignored.
-*/
-
-#ifndef DBUG_OFF
-
-static const LEX_CSTRING debug_crash_counter=
-{ STRING_WITH_LEN("debug_crash_counter") };
-static const LEX_CSTRING debug_error_counter=
-{ STRING_WITH_LEN("debug_error_counter") };
-
-static bool debug_decrement_counter(const LEX_CSTRING *name)
-{
-  THD *thd= current_thd;
-  user_var_entry *entry= (user_var_entry*)
-    my_hash_search(&thd->user_vars, (uchar*) name->str, name->length);
-  if (!entry || entry->type != INT_RESULT || ! entry->value)
-    return 0;
-  (*(ulonglong*) entry->value)= (*(ulonglong*) entry->value)-1;
-  return !*(ulonglong*) entry->value;
-}
-
-void debug_crash_here(const char *keyword)
-{
-  DBUG_ENTER("debug_crash_here");
-  DBUG_PRINT("enter", ("keyword: %s", keyword));
-
-  DBUG_EXECUTE_IF(keyword,
-                  if (debug_decrement_counter(&debug_crash_counter))
-                  {
-                    my_printf_error(ER_INTERNAL_ERROR,
-                                    "Crashing at %s",
-                                    MYF(ME_ERROR_LOG | ME_NOTE), keyword);
-                    DBUG_SUICIDE();
-                  });
-  DBUG_VOID_RETURN;
-}
-
-/*
-  This can be used as debug_counter to simulate an error at a specific
-  position.
-
-  Typical usage would be
-  if (debug_simualte_error("keyword"))
-    error= 1;
-*/
-
-bool debug_simulate_error(const char *keyword, uint error)
-{
-  DBUG_ENTER("debug_crash_here");
-  DBUG_PRINT("enter", ("keyword: %s", keyword));
-  DBUG_EXECUTE_IF(keyword,
-                  if (debug_decrement_counter(&debug_error_counter))
-                  {
-                    my_printf_error(error,
-                                    "Simulating error for '%s'",
-                                    MYF(ME_ERROR_LOG), keyword);
-                    DBUG_RETURN(1);
-                  });
-  DBUG_RETURN(0);
-}
-#endif /* DBUG_OFF */
diff --git a/sql/debug_sync.h b/sql/debug_sync.h
index 4e3e10fcc51..831b86b688e 100644
--- a/sql/debug_sync.h
+++ b/sql/debug_sync.h
@@ -52,13 +52,4 @@ static inline void debug_sync_reset_thread(THD *thd) {}
 static inline bool debug_sync_set_action(THD *, const char *, size_t)
 { return false; }
 #endif /* defined(ENABLED_DEBUG_SYNC) */
-
-#ifndef DBUG_OFF
-void debug_crash_here(const char *keyword);
-bool debug_simulate_error(const char *keyword, uint error);
-#else
-#define debug_crash_here(A) do { } while(0)
-#define debug_simulate_error(A, B) 0
-#endif
-
 #endif /* DEBUG_SYNC_INCLUDED */
diff --git a/sql/parse_file.cc b/sql/parse_file.cc
index 8ea00e96f33..8911c683901 100644
--- a/sql/parse_file.cc
+++ b/sql/parse_file.cc
@@ -25,7 +25,7 @@
 #include "parse_file.h"
 #include "unireg.h"                            // CREATE_MODE
 #include "sql_table.h"                         // build_table_filename
-#include "debug_sync.h"
+#include "debug.h"
 #include <mysys_err.h>                         // EE_WRITE
 #include <m_ctype.h>
 #include <my_dir.h>
diff --git a/sql/sql_db.cc b/sql/sql_db.cc
index 6a493ed725f..4fd90a0e0b1 100644
--- a/sql/sql_db.cc
+++ b/sql/sql_db.cc
@@ -47,7 +47,7 @@
 #ifdef __WIN__
 #include <direct.h>
 #endif
-#include "debug_sync.h"
+#include "debug.h"                       // debug_crash_here
 
 #define MAX_DROP_TABLE_Q_LEN      1024
 
diff --git a/sql/sql_insert.cc b/sql/sql_insert.cc
index 8dde0ec8989..54fb94e8e4f 100644
--- a/sql/sql_insert.cc
+++ b/sql/sql_insert.cc
@@ -77,10 +77,10 @@
 #include "sql_audit.h"
 #include "sql_derived.h"                        // mysql_handle_derived
 #include "sql_prepare.h"
+#include "debug_sync.h"                         // DEBUG_SYNC
+#include "debug.h"                              // debug_crash_here
 #include <my_bit.h>
 
-#include "debug_sync.h"
-
 #ifdef WITH_WSREP
 #include "wsrep_trans_observer.h" /* wsrep_start_transction() */
 #endif /* WITH_WSREP */
diff --git a/sql/sql_rename.cc b/sql/sql_rename.cc
index ec782792f30..205c3ce91b7 100644
--- a/sql/sql_rename.cc
+++ b/sql/sql_rename.cc
@@ -31,7 +31,7 @@
 #include "sql_handler.h"                        // mysql_ha_rm_tables
 #include "sql_statistics.h" 
 #include "ddl_log.h"
-#include "debug_sync.h"
+#include "debug.h"
 
 /* used to hold table entries for as part of list of renamed temporary tables */
 struct TABLE_PAIR
diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index 95337d641a5..f1390f232f1 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -54,9 +54,9 @@
 #include "sql_audit.h"
 #include "sql_sequence.h"
 #include "tztime.h"
-#include "sql_insert.h"                        // binlog_drop_table
+#include "sql_insert.h"                // binlog_drop_table
 #include "ddl_log.h"
-#include "debug_sync.h"                         // debug_crash_here()
+#include "debug.h"                     // debug_crash_here()
 #include <algorithm>
 
 #ifdef __WIN__
diff --git a/sql/sql_trigger.cc b/sql/sql_trigger.cc
index 181cca39f7e..c5e112bf8ae 100644
--- a/sql/sql_trigger.cc
+++ b/sql/sql_trigger.cc
@@ -33,8 +33,9 @@
 #include "sql_handler.h"                  // mysql_ha_rm_tables
 #include "sp_cache.h"                     // sp_invalidate_cache
 #include <mysys_err.h>
-#include <ddl_log.h>                      // ddl_log_state
-#include "debug_sync.h"
+#include "ddl_log.h"                      // ddl_log_state
+#include "debug_sync.h"                   // DEBUG_SYNC
+#include "debug.h"                        // debug_crash_here
 #include "mysql/psi/mysql_sp.h"
 
 /*************************************************************************/
diff --git a/sql/sql_view.cc b/sql/sql_view.cc
index c72d31d7472..61a2c43a43f 100644
--- a/sql/sql_view.cc
+++ b/sql/sql_view.cc
@@ -16,29 +16,29 @@
 */
 
 #define MYSQL_LEX 1
-#include "mariadb.h"   /* NO_EMBEDDED_ACCESS_CHECKS */
+#include "mariadb.h"           /* NO_EMBEDDED_ACCESS_CHECKS */
 #include "sql_priv.h"
 #include "unireg.h"
 #include "sql_view.h"
-#include "sql_base.h"    // find_table_in_global_list, lock_table_names
-#include "sql_parse.h"                          // sql_parse
-#include "sql_cache.h"                          // query_cache_*
-#include "lock.h"        // MYSQL_OPEN_SKIP_TEMPORARY 
-#include "sql_show.h"    // append_identifier
-#include "sql_table.h"                         // build_table_filename
+#include "sql_base.h"          // find_table_in_global_list, lock_table_names
+#include "sql_parse.h"         // sql_parse
+#include "sql_cache.h"         // query_cache_*
+#include "lock.h"              // MYSQL_OPEN_SKIP_TEMPORARY
+#include "sql_show.h"          // append_identifier
+#include "sql_table.h"         // build_table_filename
 #include "sql_db.h"            // mysql_opt_change_db, mysql_change_db
 #include "sql_select.h"
 #include "parse_file.h"
 #include "sp_head.h"
 #include "sp.h"
 #include "sp_cache.h"
-#include "datadict.h"   // dd_frm_is_view()
+#include "datadict.h"          // dd_frm_is_view()
 #include "sql_derived.h"
-#include "sql_cte.h"    // check_dependencies_in_with_clauses()
+#include "sql_cte.h"           // check_dependencies_in_with_clauses()
 #include "opt_trace.h"
 #include "ddl_log.h"
+#include "debug.h"              // debug_crash_here
 #include "wsrep_mysqld.h"
-#include "debug_sync.h" // debug_crash_here
 
 #define MD5_BUFF_LENGTH 33
 
diff --git a/storage/maria/ha_maria.cc b/storage/maria/ha_maria.cc
index d3600e9fc45..381a84cebf0 100644
--- a/storage/maria/ha_maria.cc
+++ b/storage/maria/ha_maria.cc
@@ -45,7 +45,7 @@ C_MODE_END
 #include "key.h"
 #include "log.h"
 #include "sql_parse.h"
-#include "debug_sync.h"
+#include "debug.h"
 
 /*
   Note that in future versions, only *transactional* Maria tables can