Add java_fuzz module to build java fuzzers
This change adds a new module to soong to be able to build Java fuzz
targets be able to run using Jazzer. Jazzer is an open source fuzzing engine
supported by OSS-Fuzz.
Bug: 211671266
Test: go test -run TestJavaFuzz
Change-Id: Id7c346694f5986f6e15210c359fd533fbb7001eb
diff --git a/java/Android.bp b/java/Android.bp
index 8835b44..c062941 100644
--- a/java/Android.bp
+++ b/java/Android.bp
@@ -44,6 +44,7 @@
"dexpreopt_config.go",
"droiddoc.go",
"droidstubs.go",
+ "fuzz.go",
"gen.go",
"genrule.go",
"hiddenapi.go",
diff --git a/java/fuzz.go b/java/fuzz.go
new file mode 100644
index 0000000..f72bfff
--- /dev/null
+++ b/java/fuzz.go
@@ -0,0 +1,72 @@
+// Copyright 2021 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package java
+
+import (
+ "github.com/google/blueprint/proptools"
+
+ "android/soong/android"
+ "android/soong/fuzz"
+)
+
+func init() {
+ RegisterJavaFuzzBuildComponents(android.InitRegistrationContext)
+}
+
+func RegisterJavaFuzzBuildComponents(ctx android.RegistrationContext) {
+ ctx.RegisterModuleType("java_fuzz_host", FuzzFactory)
+}
+
+type JavaFuzzLibrary struct {
+ Library
+ fuzzPackagedModule fuzz.FuzzPackagedModule
+}
+
+func (j *JavaFuzzLibrary) GenerateAndroidBuildActions(ctx android.ModuleContext) {
+ j.Library.GenerateAndroidBuildActions(ctx)
+
+ if j.fuzzPackagedModule.FuzzProperties.Corpus != nil {
+ j.fuzzPackagedModule.Corpus = android.PathsForModuleSrc(ctx, j.fuzzPackagedModule.FuzzProperties.Corpus)
+ }
+ if j.fuzzPackagedModule.FuzzProperties.Data != nil {
+ j.fuzzPackagedModule.Data = android.PathsForModuleSrc(ctx, j.fuzzPackagedModule.FuzzProperties.Data)
+ }
+ if j.fuzzPackagedModule.FuzzProperties.Dictionary != nil {
+ j.fuzzPackagedModule.Dictionary = android.PathForModuleSrc(ctx, *j.fuzzPackagedModule.FuzzProperties.Dictionary)
+ }
+
+ if j.fuzzPackagedModule.FuzzProperties.Fuzz_config != nil {
+ configPath := android.PathForModuleOut(ctx, "config").Join(ctx, "config.json")
+ android.WriteFileRule(ctx, configPath, j.fuzzPackagedModule.FuzzProperties.Fuzz_config.String())
+ j.fuzzPackagedModule.Config = configPath
+ }
+}
+
+// java_fuzz builds and links sources into a `.jar` file for the host.
+//
+// By default, a java_fuzz produces a `.jar` file containing `.class` files.
+// This jar is not suitable for installing on a device.
+func FuzzFactory() android.Module {
+ module := &JavaFuzzLibrary{}
+
+ module.addHostProperties()
+ module.Module.properties.Installable = proptools.BoolPtr(false)
+ module.AddProperties(&module.fuzzPackagedModule.FuzzProperties)
+
+ module.initModuleAndImport(module)
+ android.InitSdkAwareModule(module)
+ InitJavaModule(module, android.HostSupported)
+ return module
+}
diff --git a/java/fuzz_test.go b/java/fuzz_test.go
new file mode 100644
index 0000000..cf063eb
--- /dev/null
+++ b/java/fuzz_test.go
@@ -0,0 +1,65 @@
+// Copyright 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package java
+
+import (
+ "android/soong/android"
+ "path/filepath"
+ "testing"
+)
+
+var prepForJavaFuzzTest = android.GroupFixturePreparers(
+ PrepareForTestWithJavaDefaultModules,
+ android.FixtureRegisterWithContext(RegisterJavaFuzzBuildComponents),
+)
+
+func TestJavaFuzz(t *testing.T) {
+ result := prepForJavaFuzzTest.RunTestWithBp(t, `
+ java_fuzz_host {
+ name: "foo",
+ srcs: ["a.java"],
+ libs: ["bar"],
+ static_libs: ["baz"],
+ }
+
+ java_library_host {
+ name: "bar",
+ srcs: ["b.java"],
+ }
+
+ java_library_host {
+ name: "baz",
+ srcs: ["c.java"],
+ }`)
+
+ osCommonTarget := result.Config.BuildOSCommonTarget.String()
+ javac := result.ModuleForTests("foo", osCommonTarget).Rule("javac")
+ combineJar := result.ModuleForTests("foo", osCommonTarget).Description("for javac")
+
+ if len(javac.Inputs) != 1 || javac.Inputs[0].String() != "a.java" {
+ t.Errorf(`foo inputs %v != ["a.java"]`, javac.Inputs)
+ }
+
+ baz := result.ModuleForTests("baz", osCommonTarget).Rule("javac").Output.String()
+ barOut := filepath.Join("out", "soong", ".intermediates", "bar", osCommonTarget, "javac", "bar.jar")
+ bazOut := filepath.Join("out", "soong", ".intermediates", "baz", osCommonTarget, "javac", "baz.jar")
+
+ android.AssertStringDoesContain(t, "foo classpath", javac.Args["classpath"], barOut)
+ android.AssertStringDoesContain(t, "foo classpath", javac.Args["classpath"], bazOut)
+
+ if len(combineJar.Inputs) != 2 || combineJar.Inputs[1].String() != baz {
+ t.Errorf("foo combineJar inputs %v does not contain %q", combineJar.Inputs, baz)
+ }
+}