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authorStewart Smith <stewart@linux.vnet.ibm.com>2014-10-22 16:08:50 +1100
committerStewart Smith <stewart@linux.vnet.ibm.com>2014-10-22 16:40:55 +1100
commit30bc0aa7948a8a3000dab117646a829cd3a2b3ad (patch)
tree82fe1108b5e11c3627f17e0032b1b8cd964d3720 /libc/test
parentd9e7e3544ad2a0912b67ce3a6a66cc776dc1abe9 (diff)
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Preliminary code coverage reporting infrastructure
Add support in core/test/Makefile.check to build -gcov binaries (with -lgcov and -fprofile-blah-blah) as well as some targets for producing lcov HTML code coverage reports. As part of this, I had to fix up an oddity in run-mem_region_init where that due to running under Valgrind, we'd be malloc()ed a heap with a small address, well inside the mem_regions we added but when not running under valgrind (e.g. for code coverage reporting) we would get a much larger address, outside this range and hit an assert. So, after fiddling with the memory stuff for this test, I think I have it right - it passes both under valgrind and not and does produce code coverage data. Currently, we're at this level of code coverage by unit tests: Hit Total Coverage Lines: 1936 2574 75.2 % Functions: 177 225 78.7 % Branches: 1243 2360 52.7 % The totals should largely be ignored due to the only code being counted is that linked into the unit tests (total LOC is ~50kLOC according to sloccount... so unit tests currently cover < 5%) Try the "make coverage-report" target, you'll get coverage-report directory with a LCOV HTML report Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'libc/test')
-rw-r--r--libc/test/Makefile.check12
1 files changed, 11 insertions, 1 deletions
diff --git a/libc/test/Makefile.check b/libc/test/Makefile.check
index 188b6b1..58664a7 100644
--- a/libc/test/Makefile.check
+++ b/libc/test/Makefile.check
@@ -3,6 +3,11 @@ LIBC_TEST := libc/test/run-time
check: $(LIBC_TEST:%=%-check)
+coverage: $(LIBC_TEST:%=%-gcov-run)
+
+$(LIBC_TEST:%=%-gcov-run) : %-run: %
+ $<
+
$(LIBC_TEST:%=%-check) : %-check: %
$(VALGRIND) $<
@@ -11,6 +16,11 @@ $(LIBC_TEST) : % : %.c
$(LIBC_TEST): % : %.d
+$(LIBC_TEST:%=%-gcov): %-gcov : %.c %
+ $(HOSTCC) $(HOSTCFLAGS) -fprofile-arcs -ftest-coverage -lgcov -O0 -g -I include -I . -I libfdt -I libc/include -o $@ $<
+
+$(LIBC_TEST:%=%-gcov): % : $(%.d:-gcov=)
+
libc/test/%.d: libc/test/%.c
$(HOSTCC) $(HOSTCFLAGS) -I include -I . -I libfdt -I libc/include -M $< > $@
@@ -19,4 +29,4 @@ libc/test/%.d: libc/test/%.c
clean: libc-test-clean
libc-test-clean:
- $(RM) -f libc/test/*.[od] $(LIBC_TEST)
+ $(RM) -f libc/test/*.[od] $(LIBC_TEST) $(LIBC_TEST:%=%-gcov)