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// Copyright 2020 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 rust
import (
"path/filepath"
"sort"
"strings"
"android/soong/android"
"android/soong/cc"
"android/soong/fuzz"
"android/soong/rust/config"
)
func init() {
android.RegisterModuleType("rust_fuzz", RustFuzzFactory)
android.RegisterSingletonType("rust_fuzz_packaging", rustFuzzPackagingFactory)
}
type fuzzDecorator struct {
*binaryDecorator
fuzzPackagedModule fuzz.FuzzPackagedModule
}
var _ compiler = (*fuzzDecorator)(nil)
// rust_binary produces a binary that is runnable on a device.
func RustFuzzFactory() android.Module {
module, _ := NewRustFuzz(android.HostAndDeviceSupported)
return module.Init()
}
func NewRustFuzz(hod android.HostOrDeviceSupported) (*Module, *fuzzDecorator) {
module, binary := NewRustBinary(hod)
fuzz := &fuzzDecorator{
binaryDecorator: binary,
}
// Change the defaults for the binaryDecorator's baseCompiler
fuzz.binaryDecorator.baseCompiler.dir = "fuzz"
fuzz.binaryDecorator.baseCompiler.dir64 = "fuzz"
fuzz.binaryDecorator.baseCompiler.location = InstallInData
module.sanitize.SetSanitizer(cc.Fuzzer, true)
module.compiler = fuzz
return module, fuzz
}
func (fuzzer *fuzzDecorator) compilerFlags(ctx ModuleContext, flags Flags) Flags {
flags = fuzzer.binaryDecorator.compilerFlags(ctx, flags)
// `../lib` for installed fuzz targets (both host and device), and `./lib` for fuzz target packages.
flags.LinkFlags = append(flags.LinkFlags, `-Wl,-rpath,\$$ORIGIN/../lib`)
flags.LinkFlags = append(flags.LinkFlags, `-Wl,-rpath,\$$ORIGIN/lib`)
return flags
}
func (fuzzer *fuzzDecorator) compilerDeps(ctx DepsContext, deps Deps) Deps {
if libFuzzerRuntimeLibrary := config.LibFuzzerRuntimeLibrary(ctx.toolchain()); libFuzzerRuntimeLibrary != "" {
deps.StaticLibs = append(deps.StaticLibs, libFuzzerRuntimeLibrary)
}
deps.SharedLibs = append(deps.SharedLibs, "libc++")
deps.Rlibs = append(deps.Rlibs, "liblibfuzzer_sys")
deps = fuzzer.binaryDecorator.compilerDeps(ctx, deps)
return deps
}
func (fuzzer *fuzzDecorator) compilerProps() []interface{} {
return append(fuzzer.binaryDecorator.compilerProps(),
&fuzzer.fuzzPackagedModule.FuzzProperties)
}
func (fuzzer *fuzzDecorator) stdLinkage(ctx *depsContext) RustLinkage {
return RlibLinkage
}
func (fuzzer *fuzzDecorator) autoDep(ctx android.BottomUpMutatorContext) autoDep {
return rlibAutoDep
}
// Responsible for generating GNU Make rules that package fuzz targets into
// their architecture & target/host specific zip file.
type rustFuzzPackager struct {
fuzz.FuzzPackager
}
func rustFuzzPackagingFactory() android.Singleton {
return &rustFuzzPackager{}
}
func (s *rustFuzzPackager) GenerateBuildActions(ctx android.SingletonContext) {
// Map between each architecture + host/device combination.
archDirs := make(map[fuzz.ArchOs][]fuzz.FileToZip)
// List of individual fuzz targets.
s.FuzzTargets = make(map[string]bool)
// Map tracking whether each shared library has an install rule to avoid duplicate install rules from
// multiple fuzzers that depend on the same shared library.
sharedLibraryInstalled := make(map[string]bool)
ctx.VisitAllModules(func(module android.Module) {
// Discard non-fuzz targets.
rustModule, ok := module.(*Module)
if !ok {
return
}
if ok := fuzz.IsValid(rustModule.FuzzModule); !ok || rustModule.Properties.PreventInstall {
return
}
fuzzModule, ok := rustModule.compiler.(*fuzzDecorator)
if !ok {
return
}
hostOrTargetString := "target"
if rustModule.Host() {
hostOrTargetString = "host"
}
archString := rustModule.Arch().ArchType.String()
archDir := android.PathForIntermediates(ctx, "fuzz", hostOrTargetString, archString)
archOs := fuzz.ArchOs{HostOrTarget: hostOrTargetString, Arch: archString, Dir: archDir.String()}
var files []fuzz.FileToZip
builder := android.NewRuleBuilder(pctx, ctx)
// Package the artifacts (data, corpus, config and dictionary into a zipfile.
files = s.PackageArtifacts(ctx, module, fuzzModule.fuzzPackagedModule, archDir, builder)
// The executable.
files = append(files, fuzz.FileToZip{rustModule.UnstrippedOutputFile(), ""})
// Grab the list of required shared libraries.
sharedLibraries := fuzz.CollectAllSharedDependencies(ctx, module, cc.UnstrippedOutputFile, cc.IsValidSharedDependency)
// Package shared libraries
files = append(files, cc.GetSharedLibsToZip(sharedLibraries, rustModule, &s.FuzzPackager, archString, &sharedLibraryInstalled)...)
archDirs[archOs], ok = s.BuildZipFile(ctx, module, fuzzModule.fuzzPackagedModule, files, builder, archDir, archString, hostOrTargetString, archOs, archDirs)
if !ok {
return
}
})
s.CreateFuzzPackage(ctx, archDirs, fuzz.Rust, pctx)
}
func (s *rustFuzzPackager) MakeVars(ctx android.MakeVarsContext) {
packages := s.Packages.Strings()
sort.Strings(packages)
ctx.Strict("SOONG_RUST_FUZZ_PACKAGING_ARCH_MODULES", strings.Join(packages, " "))
// Preallocate the slice of fuzz targets to minimize memory allocations.
s.PreallocateSlice(ctx, "ALL_RUST_FUZZ_TARGETS")
}
func (fuzz *fuzzDecorator) install(ctx ModuleContext) {
fuzz.binaryDecorator.baseCompiler.dir = filepath.Join(
"fuzz", ctx.Target().Arch.ArchType.String(), ctx.ModuleName())
fuzz.binaryDecorator.baseCompiler.dir64 = filepath.Join(
"fuzz", ctx.Target().Arch.ArchType.String(), ctx.ModuleName())
fuzz.binaryDecorator.baseCompiler.install(ctx)
if fuzz.fuzzPackagedModule.FuzzProperties.Corpus != nil {
fuzz.fuzzPackagedModule.Corpus = android.PathsForModuleSrc(ctx, fuzz.fuzzPackagedModule.FuzzProperties.Corpus)
}
if fuzz.fuzzPackagedModule.FuzzProperties.Data != nil {
fuzz.fuzzPackagedModule.Data = android.PathsForModuleSrc(ctx, fuzz.fuzzPackagedModule.FuzzProperties.Data)
}
if fuzz.fuzzPackagedModule.FuzzProperties.Dictionary != nil {
fuzz.fuzzPackagedModule.Dictionary = android.PathForModuleSrc(ctx, *fuzz.fuzzPackagedModule.FuzzProperties.Dictionary)
}
}
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