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// 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 cc
// This file contains the common code for compiling C/C++ and Rust fuzzers for Android.
import (
"sort"
"strings"
"android/soong/android"
)
type Lang string
const (
Cc Lang = ""
Rust Lang = "rust"
)
type FuzzModule struct {
android.ModuleBase
android.DefaultableModuleBase
android.ApexModuleBase
}
type FuzzPackager struct {
Packages android.Paths
FuzzTargets map[string]bool
}
type FileToZip struct {
SourceFilePath android.Path
DestinationPathPrefix string
}
type ArchOs struct {
HostOrTarget string
Arch string
Dir string
}
type FuzzPackagedModule struct {
FuzzProperties FuzzProperties
Dictionary android.Path
Corpus android.Paths
CorpusIntermediateDir android.Path
Config android.Path
Data android.Paths
DataIntermediateDir android.Path
}
func IsValid(fuzzModule FuzzModule) bool {
// Discard ramdisk + vendor_ramdisk + recovery modules, they're duplicates of
// fuzz targets we're going to package anyway.
if !fuzzModule.Enabled() || fuzzModule.InRamdisk() || fuzzModule.InVendorRamdisk() || fuzzModule.InRecovery() {
return false
}
// Discard modules that are in an unavailable namespace.
if !fuzzModule.ExportedToMake() {
return false
}
return true
}
func (s *FuzzPackager) PackageArtifacts(ctx android.SingletonContext, module android.Module, fuzzModule FuzzPackagedModule, archDir android.OutputPath, builder *android.RuleBuilder) []FileToZip {
// Package the corpora into a zipfile.
var files []FileToZip
if fuzzModule.Corpus != nil {
corpusZip := archDir.Join(ctx, module.Name()+"_seed_corpus.zip")
command := builder.Command().BuiltTool("soong_zip").
Flag("-j").
FlagWithOutput("-o ", corpusZip)
rspFile := corpusZip.ReplaceExtension(ctx, "rsp")
command.FlagWithRspFileInputList("-r ", rspFile, fuzzModule.Corpus)
files = append(files, FileToZip{corpusZip, ""})
}
// Package the data into a zipfile.
if fuzzModule.Data != nil {
dataZip := archDir.Join(ctx, module.Name()+"_data.zip")
command := builder.Command().BuiltTool("soong_zip").
FlagWithOutput("-o ", dataZip)
for _, f := range fuzzModule.Data {
intermediateDir := strings.TrimSuffix(f.String(), f.Rel())
command.FlagWithArg("-C ", intermediateDir)
command.FlagWithInput("-f ", f)
}
files = append(files, FileToZip{dataZip, ""})
}
// The dictionary.
if fuzzModule.Dictionary != nil {
files = append(files, FileToZip{fuzzModule.Dictionary, ""})
}
// Additional fuzz config.
if fuzzModule.Config != nil {
files = append(files, FileToZip{fuzzModule.Config, ""})
}
return files
}
func (s *FuzzPackager) BuildZipFile(ctx android.SingletonContext, module android.Module, fuzzModule FuzzPackagedModule, files []FileToZip, builder *android.RuleBuilder, archDir android.OutputPath, archString string, hostOrTargetString string, archOs ArchOs, archDirs map[ArchOs][]FileToZip) ([]FileToZip, bool) {
fuzzZip := archDir.Join(ctx, module.Name()+".zip")
command := builder.Command().BuiltTool("soong_zip").
Flag("-j").
FlagWithOutput("-o ", fuzzZip)
for _, file := range files {
if file.DestinationPathPrefix != "" {
command.FlagWithArg("-P ", file.DestinationPathPrefix)
} else {
command.Flag("-P ''")
}
command.FlagWithInput("-f ", file.SourceFilePath)
}
builder.Build("create-"+fuzzZip.String(),
"Package "+module.Name()+" for "+archString+"-"+hostOrTargetString)
// Don't add modules to 'make haiku-rust' that are set to not be
// exported to the fuzzing infrastructure.
if config := fuzzModule.FuzzProperties.Fuzz_config; config != nil {
if strings.Contains(hostOrTargetString, "host") && !BoolDefault(config.Fuzz_on_haiku_host, true) {
return archDirs[archOs], false
} else if !BoolDefault(config.Fuzz_on_haiku_device, true) {
return archDirs[archOs], false
}
}
s.FuzzTargets[module.Name()] = true
archDirs[archOs] = append(archDirs[archOs], FileToZip{fuzzZip, ""})
return archDirs[archOs], true
}
func (s *FuzzPackager) CreateFuzzPackage(ctx android.SingletonContext, archDirs map[ArchOs][]FileToZip, lang Lang) {
var archOsList []ArchOs
for archOs := range archDirs {
archOsList = append(archOsList, archOs)
}
sort.Slice(archOsList, func(i, j int) bool { return archOsList[i].Dir < archOsList[j].Dir })
for _, archOs := range archOsList {
filesToZip := archDirs[archOs]
arch := archOs.Arch
hostOrTarget := archOs.HostOrTarget
builder := android.NewRuleBuilder(pctx, ctx)
zipFileName := "fuzz-" + hostOrTarget + "-" + arch + ".zip"
if lang == Rust {
zipFileName = "fuzz-rust-" + hostOrTarget + "-" + arch + ".zip"
}
outputFile := android.PathForOutput(ctx, zipFileName)
s.Packages = append(s.Packages, outputFile)
command := builder.Command().BuiltTool("soong_zip").
Flag("-j").
FlagWithOutput("-o ", outputFile).
Flag("-L 0") // No need to try and re-compress the zipfiles.
for _, fileToZip := range filesToZip {
if fileToZip.DestinationPathPrefix != "" {
command.FlagWithArg("-P ", fileToZip.DestinationPathPrefix)
} else {
command.Flag("-P ''")
}
command.FlagWithInput("-f ", fileToZip.SourceFilePath)
}
builder.Build("create-fuzz-package-"+arch+"-"+hostOrTarget,
"Create fuzz target packages for "+arch+"-"+hostOrTarget)
}
}
func (s *FuzzPackager) PreallocateSlice(ctx android.MakeVarsContext, targets string) {
fuzzTargets := make([]string, 0, len(s.FuzzTargets))
for target, _ := range s.FuzzTargets {
fuzzTargets = append(fuzzTargets, target)
}
sort.Strings(fuzzTargets)
ctx.Strict(targets, strings.Join(fuzzTargets, " "))
}
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