[PATCH] Valgrind support for test suite

---
 tests/Makefile |  4 ++++
 tests/Test.mk  | 17 +++++++++++------
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/tests/Makefile b/tests/Makefile
index 5d8309608..5d3f30ee2 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -141,6 +141,10 @@ test:: $(test_targets)
 $(test_targets)::
 	$(MAKE) -C $(subst -test,,$@) test
 
+memtest:: export DPKG_WRAPPER=valgrind --leak-check=full --show-leak-kinds=all --track-origins=yes
+memtest:: export DPKG_BUILDTREE=$(realpath ..)
+memtest:: $(test_targets)
+
 installtest: $(test_targets)
 
 .PHONY: test $(test_targets)
diff --git a/tests/Test.mk b/tests/Test.mk
index 3c020af2c..1f46a59af 100644
--- a/tests/Test.mk
+++ b/tests/Test.mk
@@ -21,6 +21,11 @@ ifdef DPKG_BUILDTREE
 DPKG_PATH := $(DPKG_BUILDTREE)/src:$(DPKG_BUILDTREE)/utils:$(DPKG_BUILDTREE)/scripts:$(DPKG_PATH)
 endif
 
+## Wrapper support (default none) ##
+
+DPKG_WRAPPER ?=
+export DPKG_WRAPPER
+
 DPKG_ENV = \
   PATH=$(DPKG_PATH) \
   $(DPKG_MAINTSCRIPT_DEBUG)
@@ -77,21 +82,21 @@ endif
 DPKG_ADMINDIR = $(CURDIR)/../dpkgdb
 DPKG_COMMON_OPTIONS = --admindir="$(DPKG_ADMINDIR)"
 
-DPKG = dpkg $(DPKG_COMMON_OPTIONS) $(DPKG_OPTIONS)
+DPKG = $(DPKG_WRAPPER) dpkg $(DPKG_COMMON_OPTIONS) $(DPKG_OPTIONS)
 DPKG_INSTALL = $(BEROOT) $(DPKG) -i
 DPKG_UNPACK = $(BEROOT) $(DPKG) --unpack
 DPKG_CONFIGURE = $(BEROOT) $(DPKG) --configure
 DPKG_REMOVE = $(BEROOT) $(DPKG) -r
 DPKG_PURGE = $(BEROOT) $(DPKG) -P
 DPKG_VERIFY = $(DPKG) -V
-DPKG_DEB = dpkg-deb $(DPKG_DEB_OPTIONS)
-DPKG_DIVERT = dpkg-divert $(DPKG_COMMON_OPTIONS) $(DPKG_DIVERT_OPTIONS)
+DPKG_DEB = $(DPKG_WRAPPER) dpkg-deb $(DPKG_DEB_OPTIONS)
+DPKG_DIVERT = $(DPKG_WRAPPER) dpkg-divert $(DPKG_COMMON_OPTIONS) $(DPKG_DIVERT_OPTIONS)
 DPKG_DIVERT_ADD = $(BEROOT) $(DPKG_DIVERT) --add
 DPKG_DIVERT_DEL = $(BEROOT) $(DPKG_DIVERT) --remove
-DPKG_SPLIT = dpkg-split $(DPKG_SPLIT_OPTIONS)
+DPKG_SPLIT = $(DPKG_WRAPPER) dpkg-split $(DPKG_SPLIT_OPTIONS)
 DPKG_BUILD_DEB = $(DPKG_DEB) -b
-DPKG_QUERY = dpkg-query $(DPKG_COMMON_OPTIONS) $(DPKG_QUERY_OPTIONS)
-DPKG_TRIGGER = dpkg-trigger $(DPKG_COMMON_OPTIONS) $(DPKG_TRIGGER_OPTIONS)
+DPKG_QUERY = $(DPKG_WRAPPER) dpkg-query $(DPKG_COMMON_OPTIONS) $(DPKG_QUERY_OPTIONS)
+DPKG_TRIGGER = $(DPKG_WRAPPER) dpkg-trigger $(DPKG_COMMON_OPTIONS) $(DPKG_TRIGGER_OPTIONS)
 
 PKG_STATUS = $(DPKG_QUERY) -f '$${Status}' -W