Added verbose mode to recovery

More DBUG
Added convert-debug-for-diff
Added missing (from last push) federated test case

.bzrignore:
  Ignore generated files
mysql-test/README:
  Updated documentation for --extern
mysql-test/suite/federated/federated_bug_32426.result:
  Added test for federatedx
mysql-test/suite/federated/federated_bug_32426.test:
  Added test for federatedx
scripts/Makefile.am:
  Added convert-debug-for-diff
scripts/convert-debug-for-diff.sh:
  Added script for converting
sql/log.cc:
  Added DBUG
sql/mysqld.cc:
  Added DBUG
storage/maria/ma_recovery.c:
  If verbose, write dirty pages (for debugging)
storage/maria/ma_static.c:
  Added verbose mode to recovery
storage/maria/maria_def.h:
  Added verbose mode to recovery
storage/maria/maria_read_log.c:
  Added verbose mode to recovery

2 files changed, 30 insertions, 2 deletions

diff --git a/scripts/Makefile.am b/scripts/Makefile.am
index b74e7b8df8b..be9354bd628 100644
--- a/scripts/Makefile.am
+++ b/scripts/Makefile.am
@@ -37,7 +37,8 @@ bin_SCRIPTS =		@server_scripts@ \
 			mysqld_multi
 
 noinst_SCRIPTS =	make_binary_distribution \
-			make_sharedlib_distribution
+			make_sharedlib_distribution \
+			convert-debug-for-diff
 
 EXTRA_SCRIPTS =		make_binary_distribution.sh \
 			make_sharedlib_distribution.sh \
@@ -59,7 +60,8 @@ EXTRA_SCRIPTS =		make_binary_distribution.sh \
 			mysqlhotcopy.sh \
 			mysqldumpslow.sh \
 			mysqld_multi.sh \
-			mysqld_safe.sh
+			mysqld_safe.sh \
+			convert-debug-for-diff.sh
 
 EXTRA_DIST =		$(EXTRA_SCRIPTS) \
 			mysqlaccess.conf \
@@ -91,6 +93,7 @@ CLEANFILES =		@server_scripts@ \
 			mysqlhotcopy \
 			mysqldumpslow \
 			mysqld_multi \
+			convert-debug-for-diff \
 			$(EXTRA_PROGRAMS)
 
 pkgplugindir =		$(pkglibdir)/plugin
diff --git a/scripts/convert-debug-for-diff.sh b/scripts/convert-debug-for-diff.sh
new file mode 100755
index 00000000000..2c4c86acd3c
--- /dev/null
+++ b/scripts/convert-debug-for-diff.sh
@@ -0,0 +1,25 @@
+#!/usr/bin/perl -i
+#
+# This script converts all numbers that look like addresses or memory sizes,
+# in a debug files generated by --debug (like mysqld --debug), to #.
+# The script also deletes all thread id's from the start of the line.
+
+# This allows you to easily compare the files (for example with diff)
+# to find out what changes between different executions.
+# This is extremely useful for comparing two mysqld versions to see
+# why things now work differently.
+
+# The script converts the files in place.
+#
+# Typical usage:
+#
+# convert-debug-for-diff /tmp/mysqld.trace /tmp/mysqld-old.trace
+# diff /tmp/mysqld.trace /tmp/mysqld-old.trace
+
+while (<>)
+{
+  s/^T@[0-9]+://g;
+  s/0x[0-9a-f]+(\s|\n|\))/#$1/g;
+  s/size: [0-9]+/size: #/g;
+  print $_;
+}