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Commit aa1d0cf7 authored by Muhammad Haseeb Ahmad's avatar Muhammad Haseeb Ahmad
Browse files

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
parent 69e87311

java/Android.bp

+1 −0
Original line number Diff line number Diff line
@@ -44,6 +44,7 @@ bootstrap_go_package { 
        "dexpreopt_config.go",

        "droiddoc.go",

        "droidstubs.go",

        "fuzz.go",

        "gen.go",

        "genrule.go",

        "hiddenapi.go",

java/fuzz.go

0 → 100644
+72 −0
Original line number Diff line number Diff line 
// 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

}

java/fuzz_test.go

0 → 100644
+65 −0
Original line number Diff line number Diff line 
// 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)

	}

}