Makefile: Add fuzz target setup

5 files changed, 74 insertions, 6 deletions

diff --git a/.gitignore b/.gitignore
index 3bb73dd..3d9fb8b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,5 @@
 /tests/functional/*.a
 /tests/functional/*.bin
 /tests/functional/*.so
+/tests/fuzz/*.a
+/tests/fuzz/*.bin
diff --git a/Makefile b/Makefile
index 10af5c8..6ddd223 100644
--- a/Makefile
+++ b/Makefile
@@ -37,6 +37,8 @@ include deps.mk
 
 functional-tests.a   = $(functional-tests.go:.go=.a)
 functional-tests.bin = $(functional-tests.go:.go=.bin)
+fuzz-targets.a       = $(fuzz-targets.go:.go=.a)
+fuzz-targets.bin     = $(fuzz-targets.go:.go=.bin)
 
 cgo.go = \
 	src/_cgo_import.go             \
@@ -67,6 +69,8 @@ derived-assets = \
 	$(functional-tests.a)          \
 	$(functional-tests.bin)        \
 	tests/functional/streq.so      \
+	$(fuzz-targets.a)              \
+	$(fuzz-targets.bin)            \
 
 side-assets = \
 	src/_cgo_export.h              \
@@ -83,6 +87,8 @@ $(derived-assets): Makefile deps.mk
 
 $(cgo.go) $(cgo.c) $(cgo.o): src/_cgo_.o
 
+$(functional-tests.a) $(fuzz-targets.a): src/$(NAME).a
+
 
 src/_cgo_.o: src/$(NAME).go
 	go tool cgo --objdir $(@D) src/$(NAME).go
@@ -107,10 +113,13 @@ tests/main.bin: tests/main.a
 src/version.go: Makefile
 	echo 'package $(NAME); const Version = "$(VERSION)"' > $@
 
-$(functional-tests.a): src/$(NAME).a
-	go tool compile $(GOCFLAGS) -o $@ -p main  -I src   $*.go
+$(functional-tests.a):
+	go tool compile              $(GOCFLAGS) -o $@ -p main  -I src   $*.go
+
+$(fuzz-targets.a):
+	go tool compile -d=libfuzzer $(GOCFLAGS) -o $@ -p main  -I src   $*.go
 
-$(functional-tests.bin):
+$(functional-tests.bin) $(fuzz-targets.bin):
 	go tool link   $(GOLDFLAGS) -o $@ -L src   --extldflags '$(LDLIBS)' $*.a
 
 tests/functional/streq.so: tests/functional/streq.c
@@ -152,6 +161,16 @@ check: check-unit check-integration
 
 
 
+FUZZSEC=1
+fuzz-targets.bin-check = $(fuzz-targets.go:.go=.bin-check)
+$(fuzz-targets.bin-check):
+	$(EXEC)$*.bin --test.fuzztime=$(FUZZSEC)s \
+		--test.fuzz=Fuzz --test.fuzzcachedir=tests/fuzz/corpus
+
+fuzz: $(fuzz-targets.bin-check)
+
+
+
 bench: tests/main.bin
 	$(EXEC)tests/main.bin -test.bench '.*'
 
diff --git a/deps.mk b/deps.mk
index 5f458e5..9de79a9 100644
--- a/deps.mk
+++ b/deps.mk
@@ -9,15 +9,21 @@ functional-tests-butone.go = \
 	tests/functional/libbuild.go \
 	tests/functional/limit.go \
 
+fuzz-targets.go = \
+	tests/fuzz/api.go \
+
 tests/functional/extension.a:	tests/functional/extension.go
 tests/functional/json.a:	tests/functional/json.go
 tests/functional/libbuild.a:	tests/functional/libbuild.go
 tests/functional/limit.a:	tests/functional/limit.go
+tests/fuzz/api.a:	tests/fuzz/api.go
 tests/functional/extension.bin:	tests/functional/extension.a
 tests/functional/json.bin:	tests/functional/json.a
 tests/functional/libbuild.bin:	tests/functional/libbuild.a
 tests/functional/limit.bin:	tests/functional/limit.a
+tests/fuzz/api.bin:	tests/fuzz/api.a
 tests/functional/extension.bin-check:	tests/functional/extension.bin
 tests/functional/json.bin-check:	tests/functional/json.bin
 tests/functional/libbuild.bin-check:	tests/functional/libbuild.bin
 tests/functional/limit.bin-check:	tests/functional/limit.bin
+tests/fuzz/api.bin-check:	tests/fuzz/api.bin
diff --git a/mkdeps.sh b/mkdeps.sh
index ceb57af..8ccfc69 100755
--- a/mkdeps.sh
+++ b/mkdeps.sh
@@ -7,6 +7,13 @@ export LANG=POSIX.UTF-8
 find tests/functional/*.go | varlist 'functional-tests.go'
 find tests/functional/*.go -not -name extension.go | varlist 'functional-tests-butone.go'
 
-find tests/functional/*.go | sed 's/^\(.*\)\.go$/\1.a:\t\1.go/'
-find tests/functional/*.go | sed 's/^\(.*\)\.go$/\1.bin:\t\1.a/'
-find tests/functional/*.go | sed 's/^\(.*\)\.go$/\1.bin-check:\t\1.bin/'
+find tests/fuzz/*.go | varlist 'fuzz-targets.go'
+
+
+tfiles() {
+	find tests/functional/*.go tests/fuzz/*.go | sort
+}
+
+tfiles | sed 's/^\(.*\)\.go$/\1.a:\t\1.go/'
+tfiles | sed 's/^\(.*\)\.go$/\1.bin:\t\1.a/'
+tfiles | sed 's/^\(.*\)\.go$/\1.bin-check:\t\1.bin/'
diff --git a/tests/fuzz/api.go b/tests/fuzz/api.go
new file mode 100644
index 0000000..50a19d2
--- /dev/null
+++ b/tests/fuzz/api.go
@@ -0,0 +1,34 @@
+package main
+
+import (
+	"os"
+	"testing"
+	"testing/internal/testdeps"
+)
+
+
+
+func FuzzAPI(f *testing.F) {
+	f.Add(123)
+	f.Fuzz(func(t *testing.T, n int) {
+		// FIXME
+		if n == 1234 {
+			t.Errorf("Failed n: %q\n", n)
+		}
+	})
+}
+
+
+
+func main() {
+	fuzzTargets := []testing.InternalFuzzTarget{
+		{ "FuzzAPI", FuzzAPI },
+	}
+
+	deps := testdeps.TestDeps{}
+	tests      := []testing.InternalTest     {}
+	benchmarks := []testing.InternalBenchmark{}
+	examples   := []testing.InternalExample  {}
+	m := testing.MainStart(deps, tests, benchmarks, fuzzTargets, examples)
+	os.Exit(m.Run())
+}