MDEV-6348: mariadb crash signal 11

Analysis: sync array output function, should make sure that all
used pointers are valid before using them.

Merge revision 4225 from lp:maria/5.5.

mysql-test/suite/innodb/include/innodb_simulate_comp_failures.inc

@@ -0,0 +1,147 @@
+--echo #
+--echo # Testing robustness against random compression failures
+--echo #
+
+--source include/not_embedded.inc
+--source include/have_innodb.inc
+
+--disable_query_log
+# record the file format in order to restore in the end.
+--let $file_format_save = `SELECT @@innodb_file_format`
+--let $file_format_max_save = `SELECT @@innodb_file_format_max`
+--let $simulate_comp_failures_save = `SELECT @@innodb_simulate_comp_failures`
+
+--disable_warnings
+DROP TABLE IF EXISTS t1;
+SET GLOBAL INNODB_FILE_FORMAT='Barracuda';
+--enable_warnings
+
+# since this test generates lot of errors in log, suppress checking errors
+call mtr.add_suppression(".*");
+--enable_query_log
+
+# create the table with compressed pages of size 8K.
+CREATE TABLE t1(id INT AUTO_INCREMENT PRIMARY KEY, msg VARCHAR(255), KEY msg_i(msg)) ENGINE=INNODB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=8;
+
+# percentage of compressions that will be forced to fail
+SET GLOBAL innodb_simulate_comp_failures = 25;
+
+--disable_query_log
+--disable_result_log
+
+let $num_inserts_ind = $num_inserts;
+while ($num_inserts_ind)
+{
+  let $repeat = `select floor(rand() * 10)`;
+  eval
+INSERT INTO t1(id, msg)
+VALUES ($num_inserts_ind, REPEAT('abcdefghijklmnopqrstuvwxyz', $repeat));
+  dec $num_inserts_ind;
+}
+
+--enable_query_log
+--enable_result_log
+
+SELECT COUNT(*) FROM t1;
+
+--disable_query_log
+--disable_result_log
+
+# do random ops, making sure that some pages will get fragmented and reorganized.
+let $num_ops_ind = $num_ops;
+
+while($num_ops_ind)
+{
+  let $idx = `select floor(rand()*$num_inserts)`;
+	let $insert_or_update = `select floor(rand()*3)`;
+
+  let $repeat = `select floor(rand() * 9) + 1`;
+
+  let $msg = query_get_value(`select repeat('abcdefghijklmnopqrstuvwxyz', $repeat) as x`, x, 1);
+
+  let $single_or_multi = `select floor(rand()*10)`;
+
+  if ($insert_or_update)
+  {
+    let $cnt = query_get_value(SELECT COUNT(*) cnt FROM t1 WHERE id=$idx, cnt, 1);
+
+    if ($cnt)
+    {
+      let $update = `select floor(rand()*2)`;
+
+      if ($update)
+      {
+        if ($single_or_multi)
+        {
+          eval UPDATE t1 SET msg=\"$msg\" WHERE id=$idx;
+        }
+
+        if (!$single_or_multi)
+        {
+          eval UPDATE t1 SET msg=\"$msg\" WHERE id >= $idx - 100 AND id <= $idx + 100;
+        }
+
+      }
+
+      if (!$update)
+      {
+        if ($single_or_multi)
+        {
+          eval INSERT INTO t1(msg, id) VALUES (\"$msg\", $idx) ON DUPLICATE KEY UPDATE msg=VALUES(msg), id = VALUES(id);
+        }
+
+        if (!$single_or_multi)
+        {
+          let $diff = 200;
+
+          while ($diff)
+          {
+            eval INSERT INTO t1(msg, id) VALUES (\"$msg\", $idx + 100 - $diff) ON DUPLICATE KEY UPDATE msg=VALUES(msg), id=VALUES(id);
+
+            dec $diff;
+          }
+        }
+      }
+    }
+
+    if (!$cnt)
+    {
+      let $null_msg = `select floor(rand()*2)`;
+
+      if ($null_msg)
+      {
+        eval INSERT INTO t1(id,msg) VALUES ($idx, NULL);
+      }
+
+      if (!$null_msg)
+      {
+        eval INSERT INTO t1(id, msg) VALUES ($idx, \"$msg\");
+      }
+    }
+  }
+
+  if (!$insert_or_update)
+  {
+    if ($single_or_multi)
+    {
+      eval DELETE from t1 WHERE id=$idx;
+    }
+
+    if (!$single_or_multi)
+    {
+      eval DELETE from t1 WHERE id >= $idx - 100 AND id <= $idx + 100;
+    }
+  }
+
+  dec $num_ops_ind;
+}
+
+# final cleanup
+DROP TABLE t1;
+
+# restore innodb_file_format and innodb_file_format_max
+eval SET GLOBAL innodb_file_format = \"$file_format_save\";
+eval SET GLOBAL innodb_file_format_max = \"$file_format_max_save\";
+eval SET GLOBAL innodb_simulate_comp_failures = $simulate_comp_failures_save;
+
+--enable_query_log

mysql-test/suite/innodb/r/innodb_simulate_comp_failures.result

@@ -0,0 +1,8 @@
+#
+# Testing robustness against random compression failures
+#
+CREATE TABLE t1(id INT AUTO_INCREMENT PRIMARY KEY, msg VARCHAR(255), KEY msg_i(msg)) ENGINE=INNODB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=8;
+SET GLOBAL innodb_simulate_comp_failures = 25;
+SELECT COUNT(*) FROM t1;
+COUNT(*)
+100000

mysql-test/suite/innodb/r/innodb_simulate_comp_failures_small.result

@@ -0,0 +1,8 @@
+#
+# Testing robustness against random compression failures
+#
+CREATE TABLE t1(id INT AUTO_INCREMENT PRIMARY KEY, msg VARCHAR(255), KEY msg_i(msg)) ENGINE=INNODB ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=8;
+SET GLOBAL innodb_simulate_comp_failures = 25;
+SELECT COUNT(*) FROM t1;
+COUNT(*)
+10000

mysql-test/suite/innodb/t/innodb_simulate_comp_failures-master.opt

@@ -0,0 +1,2 @@
+--innodb-file-per-table
+

mysql-test/suite/innodb/t/innodb_simulate_comp_failures.test

@@ -0,0 +1,8 @@
+--source include/big_test.inc
+# test takes too long with valgrind
+--source include/not_valgrind.inc
+--let $num_inserts = 100000
+--let $num_ops = 30000
+--source suite/innodb/include/innodb_simulate_comp_failures.inc
+# clean exit
+--exit

mysql-test/suite/innodb/t/innodb_simulate_comp_failures_small-master.opt

@@ -0,0 +1,2 @@
+--innodb-file-per-table
+

mysql-test/suite/innodb/t/innodb_simulate_comp_failures_small.test

@@ -0,0 +1,5 @@
+--let $num_inserts = 10000
+--let $num_ops = 3000
+--source suite/innodb/include/innodb_simulate_comp_failures.inc
+# clean exit
+--exit