added offset-extract. hot_patch cleanup.

offset-extract/offset-extract.sh

@@ -0,0 +1,47 @@
+#!/bin/sh
+
+if [ $# = 0 ]; then 	
+	echo "Usage: $0 <mysqld executable> [optional mysqld symbols]"
+	echo "Will extract offsets from mysqld. Requires gdb and mysqld symbols."
+	exit 1
+fi
+
+#extract the version
+
+FULL_MYVER=`$1 --version | grep -P  -o 'Ver\s+[\w\.-]+'| awk '{print $2}'`
+
+#extract the md5 digest
+
+MYMD5=`md5sum -b $1 | awk -v Field=1 '{print $1}'`
+
+MYVER="$FULL_MYVER"
+echo $FULL_MYVER | grep  'log' > /dev/null
+
+
+if [ $? = 0 ]; then
+	MYVER=`echo "$MYVER" | grep -P  -o '.+(?=-log)'`
+fi
+
+echo "set logging on" > offsets.gdb
+echo 'printf "{\"'$MYVER'\",\"'$MYMD5'\", %d, %d, %d, %d, %d, %d}", ((size_t)&((THD *)log_slow_statement)->query_id) - (size_t)log_slow_statement, ((size_t)&((THD *)log_slow_statement)->thread_id) - (size_t)log_slow_statement, ((size_t)&((THD *)log_slow_statement)->main_security_ctx) - (size_t)log_slow_statement, ((size_t)&((THD *)log_slow_statement)->command) - (size_t)log_slow_statement, ((size_t)&((THD *)log_slow_statement)->lex) - (size_t)log_slow_statement, (size_t)&((LEX*)log_slow_statement)->comment - (size_t)  log_slow_statement' >> offsets.gdb
+
+SYMPARAM=""
+if [ -n "$2" ]; then
+	SYMPARAM="-s $2 -e"
+fi
+
+gdb -n -q -batch -x offsets.gdb $SYMPARAM  $1 > /dev/null 2>&1
+
+if [ $? != 0 ]; then
+	echo "GDB failed!!!" > /dev/stderr
+	exit 2
+fi
+
+OFFSETS=`cat gdb.txt`
+echo "//offsets for: $1 ($FULL_MYVER)"
+echo "$OFFSETS,"
+
+#clean up
+rm gdb.txt
+rm offsets.gdb
+