[PATCH] trace-cmd: Add Makefie target for memory test

["Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>]

Having an automated test for memory problems is a useful functionality.
Combined with the trace-cmd unit test, it can be used to detect any
memory issues in the application. New Makefile target is added, which
runs the trace-cmd unit test on valgrind, to check for memory allocation
errors.

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
---
 Makefile       |  3 +++
 utest/Makefile | 15 +++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/Makefile b/Makefile
index ea83f600..9183ba7a 100644
--- a/Makefile
+++ b/Makefile
@@ -456,6 +456,9 @@ ifneq ($(CUNIT_INSTALLED),1)
 endif
 	$(Q)$(MAKE) -C $(src)/utest $@
 
+test_mem: force test
+	$(Q)$(MAKE) -C $(src)/utest $@
+
 plugins_tracecmd: force $(obj)/lib/trace-cmd/plugins/tracecmd_plugin_dir
 	$(Q)$(MAKE) -C $(src)/lib/trace-cmd/plugins
 
diff --git a/utest/Makefile b/utest/Makefile
index 337db9bf..480edcd3 100644
--- a/utest/Makefile
+++ b/utest/Makefile
@@ -17,6 +17,8 @@ LIBS += $(ZLIB_LDLAGS) $(LIBZSTD_LDLAGS)
 OBJS := $(OBJS:%.o=$(bdir)/%.o)
 DEPS := $(OBJS:$(bdir)/%.o=$(bdir)/.%.d)
 
+VALGRIND = $(shell which valgrind)
+
 $(bdir):
 	@mkdir -p $(bdir)
 
@@ -39,5 +41,18 @@ dep_includes := $(wildcard $(DEPS))
 
 test: $(TARGETS)
 
+test_mem: test
+ifeq (, $(VALGRIND))
+	$(error "No valgrind in $(PATH), cannot run memory test")
+endif
+ifneq ($(shell id -u), 0)
+	$(error "The memory test should be run as root, as it reuqires full access to tracefs")
+endif
+	CK_FORK=no $(VALGRIND) \
+		--show-leak-kinds=all --leak-resolution=high \
+		--leak-check=full --show-possibly-lost=yes \
+		--track-origins=yes -s \
+		$(bdir)/trace-utest
+
 clean:
 	$(RM) $(TARGETS) $(bdir)/*.o $(bdir)/.*.d
-- 
2.40.1