Hint how to use Dr.Memory for unit tests / memory checking.

Change-Id: I7df8716e90e9097336919d2a9208a549b8f7d3d0

solenv/bin/unittest-failed.sh

@@ -17,27 +17,28 @@
 #   except in compliance with the License. You may obtain a copy of
 #   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 
-cat << EOF
-
-Error: a unit test failed, please do one of:
+ECHECKING='export DEBUGCPPUNIT=TRUE            # for exception catching'
+DEBUGGING=
+MCHECKING='export VALGRIND=memcheck            # for memory checking'
 
-export DEBUGCPPUNIT=TRUE            # for exception catching
-EOF
 if [ "$3" = "WNT" ]; then
-cat << EOF
-export CPPUNITTRACE="\"[full path to devenv.exe]\" /debugexe" # for interactive debugging in Visual Studio
-EOF
+    ECHECKING='export DEBUGCPPUNIT=TRUE                                      # for exception catching'
+    DEBUGGING='export CPPUNITTRACE="\"[full path to devenv.exe]\" /debugexe" # for interactive debugging in Visual Studio'
+    MCHECKING='export CPPUNITTRACE="drmemory -free_max_frames 20"            # for memory checking (install Dr.Memory first)'
 elif [ "$3" = "MACOSX" ]; then
-cat << EOF
-export CPPUNITTRACE="lldb --" # for interactive debugging on OS X
-EOF
+    DEBUGGING='export CPPUNITTRACE="lldb --"       # for interactive debugging on OS X'
 else
-cat << EOF
-export CPPUNITTRACE="gdb --args"    # for interactive debugging on Linux
-EOF
+    DEBUGGING='export CPPUNITTRACE="gdb --args"    # for interactive debugging on Linux'
 fi
+
+# print the actual error message
 cat << EOF
-export VALGRIND=memcheck            # for memory checking
+
+Error: a unit test failed, please do one of:
+
+$ECHECKING
+$DEBUGGING
+$MCHECKING
 
 and retry using: make $1Test_$2