cb6143a142
Use the -printusage flag in R8 to output a list of the unused methods. Some of the files can be large (2MB for DocumentsUI, 87MB for all of AOSP), so immediately zip them and remove the originals. The zipped files will be merged and disted. Bug: 151857441 Test: m TARGET_BUILD_APPS=DocumentsUI dist Change-Id: I780e84e80eba7fe4d4fa15fec0f461890afd900b
330 lines
12 KiB
Go
330 lines
12 KiB
Go
// Copyright 2017 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package java
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import (
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"strings"
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"github.com/google/blueprint"
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"github.com/google/blueprint/proptools"
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"android/soong/android"
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"android/soong/remoteexec"
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)
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type DexProperties struct {
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// If set to true, compile dex regardless of installable. Defaults to false.
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Compile_dex *bool
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// list of module-specific flags that will be used for dex compiles
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Dxflags []string `android:"arch_variant"`
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Optimize struct {
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// If false, disable all optimization. Defaults to true for android_app and android_test
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// modules, false for java_library and java_test modules.
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Enabled *bool
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// True if the module containing this has it set by default.
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EnabledByDefault bool `blueprint:"mutated"`
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// If true, optimize for size by removing unused code. Defaults to true for apps,
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// false for libraries and tests.
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Shrink *bool
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// If true, optimize bytecode. Defaults to false.
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Optimize *bool
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// If true, obfuscate bytecode. Defaults to false.
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Obfuscate *bool
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// If true, do not use the flag files generated by aapt that automatically keep
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// classes referenced by the app manifest. Defaults to false.
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No_aapt_flags *bool
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// Flags to pass to proguard.
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Proguard_flags []string
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// Specifies the locations of files containing proguard flags.
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Proguard_flags_files []string `android:"path"`
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}
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// Keep the data uncompressed. We always need uncompressed dex for execution,
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// so this might actually save space by avoiding storing the same data twice.
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// This defaults to reasonable value based on module and should not be set.
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// It exists only to support ART tests.
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Uncompress_dex *bool
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}
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type dexer struct {
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dexProperties DexProperties
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// list of extra proguard flag files
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extraProguardFlagFiles android.Paths
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proguardDictionary android.OptionalPath
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proguardUsageZip android.OptionalPath
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}
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func (d *dexer) effectiveOptimizeEnabled() bool {
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return BoolDefault(d.dexProperties.Optimize.Enabled, d.dexProperties.Optimize.EnabledByDefault)
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}
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var d8, d8RE = remoteexec.MultiCommandStaticRules(pctx, "d8",
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blueprint.RuleParams{
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Command: `rm -rf "$outDir" && mkdir -p "$outDir" && ` +
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`$d8Template${config.D8Cmd} ${config.DexFlags} --output $outDir $d8Flags $in && ` +
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`$zipTemplate${config.SoongZipCmd} $zipFlags -o $outDir/classes.dex.jar -C $outDir -f "$outDir/classes*.dex" && ` +
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`${config.MergeZipsCmd} -D -stripFile "**/*.class" $out $outDir/classes.dex.jar $in`,
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CommandDeps: []string{
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"${config.D8Cmd}",
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"${config.SoongZipCmd}",
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"${config.MergeZipsCmd}",
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},
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}, map[string]*remoteexec.REParams{
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"$d8Template": &remoteexec.REParams{
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Labels: map[string]string{"type": "compile", "compiler": "d8"},
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Inputs: []string{"${config.D8Jar}"},
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ExecStrategy: "${config.RED8ExecStrategy}",
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ToolchainInputs: []string{"${config.JavaCmd}"},
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Platform: map[string]string{remoteexec.PoolKey: "${config.REJavaPool}"},
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},
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"$zipTemplate": &remoteexec.REParams{
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Labels: map[string]string{"type": "tool", "name": "soong_zip"},
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Inputs: []string{"${config.SoongZipCmd}", "$outDir"},
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OutputFiles: []string{"$outDir/classes.dex.jar"},
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ExecStrategy: "${config.RED8ExecStrategy}",
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Platform: map[string]string{remoteexec.PoolKey: "${config.REJavaPool}"},
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},
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}, []string{"outDir", "d8Flags", "zipFlags"}, nil)
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var r8, r8RE = remoteexec.MultiCommandStaticRules(pctx, "r8",
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blueprint.RuleParams{
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Command: `rm -rf "$outDir" && mkdir -p "$outDir" && ` +
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`rm -f "$outDict" && rm -rf "${outUsageDir}" && ` +
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`mkdir -p $$(dirname ${outUsage}) && ` +
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`$r8Template${config.R8Cmd} ${config.DexFlags} -injars $in --output $outDir ` +
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`--force-proguard-compatibility ` +
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`--no-data-resources ` +
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`-printmapping ${outDict} ` +
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`-printusage ${outUsage} ` +
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`$r8Flags && ` +
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`touch "${outDict}" "${outUsage}" && ` +
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`${config.SoongZipCmd} -o ${outUsageZip} -C ${outUsageDir} -f ${outUsage} && ` +
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`rm -rf ${outUsageDir} && ` +
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`$zipTemplate${config.SoongZipCmd} $zipFlags -o $outDir/classes.dex.jar -C $outDir -f "$outDir/classes*.dex" && ` +
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`${config.MergeZipsCmd} -D -stripFile "**/*.class" $out $outDir/classes.dex.jar $in`,
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CommandDeps: []string{
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"${config.R8Cmd}",
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"${config.SoongZipCmd}",
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"${config.MergeZipsCmd}",
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},
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}, map[string]*remoteexec.REParams{
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"$r8Template": &remoteexec.REParams{
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Labels: map[string]string{"type": "compile", "compiler": "r8"},
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Inputs: []string{"$implicits", "${config.R8Jar}"},
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ExecStrategy: "${config.RER8ExecStrategy}",
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ToolchainInputs: []string{"${config.JavaCmd}"},
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Platform: map[string]string{remoteexec.PoolKey: "${config.REJavaPool}"},
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},
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"$zipTemplate": &remoteexec.REParams{
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Labels: map[string]string{"type": "tool", "name": "soong_zip"},
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Inputs: []string{"${config.SoongZipCmd}", "$outDir"},
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OutputFiles: []string{"$outDir/classes.dex.jar"},
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ExecStrategy: "${config.RER8ExecStrategy}",
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Platform: map[string]string{remoteexec.PoolKey: "${config.REJavaPool}"},
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},
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"$zipUsageTemplate": &remoteexec.REParams{
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Labels: map[string]string{"type": "tool", "name": "soong_zip"},
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Inputs: []string{"${config.SoongZipCmd}", "${outUsage}"},
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OutputFiles: []string{"${outUsageZip}"},
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ExecStrategy: "${config.RER8ExecStrategy}",
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Platform: map[string]string{remoteexec.PoolKey: "${config.REJavaPool}"},
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},
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}, []string{"outDir", "outDict", "outUsage", "outUsageZip", "outUsageDir",
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"r8Flags", "zipFlags"}, []string{"implicits"})
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func (d *dexer) dexCommonFlags(ctx android.ModuleContext, minSdkVersion sdkSpec) []string {
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flags := d.dexProperties.Dxflags
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// Translate all the DX flags to D8 ones until all the build files have been migrated
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// to D8 flags. See: b/69377755
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flags = android.RemoveListFromList(flags,
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[]string{"--core-library", "--dex", "--multi-dex"})
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if ctx.Config().Getenv("NO_OPTIMIZE_DX") != "" {
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flags = append(flags, "--debug")
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}
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if ctx.Config().Getenv("GENERATE_DEX_DEBUG") != "" {
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flags = append(flags,
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"--debug",
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"--verbose")
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}
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effectiveVersion, err := minSdkVersion.effectiveVersion(ctx)
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if err != nil {
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ctx.PropertyErrorf("min_sdk_version", "%s", err)
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}
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flags = append(flags, "--min-api "+effectiveVersion.asNumberString())
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return flags
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}
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func d8Flags(flags javaBuilderFlags) (d8Flags []string, d8Deps android.Paths) {
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d8Flags = append(d8Flags, flags.bootClasspath.FormRepeatedClassPath("--lib ")...)
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d8Flags = append(d8Flags, flags.classpath.FormRepeatedClassPath("--lib ")...)
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d8Deps = append(d8Deps, flags.bootClasspath...)
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d8Deps = append(d8Deps, flags.classpath...)
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return d8Flags, d8Deps
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}
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func (d *dexer) r8Flags(ctx android.ModuleContext, flags javaBuilderFlags) (r8Flags []string, r8Deps android.Paths) {
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opt := d.dexProperties.Optimize
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// When an app contains references to APIs that are not in the SDK specified by
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// its LOCAL_SDK_VERSION for example added by support library or by runtime
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// classes added by desugaring, we artifically raise the "SDK version" "linked" by
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// ProGuard, to
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// - suppress ProGuard warnings of referencing symbols unknown to the lower SDK version.
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// - prevent ProGuard stripping subclass in the support library that extends class added in the higher SDK version.
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// See b/20667396
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var proguardRaiseDeps classpath
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ctx.VisitDirectDepsWithTag(proguardRaiseTag, func(dep android.Module) {
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proguardRaiseDeps = append(proguardRaiseDeps, dep.(Dependency).HeaderJars()...)
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})
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r8Flags = append(r8Flags, proguardRaiseDeps.FormJavaClassPath("-libraryjars"))
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r8Flags = append(r8Flags, flags.bootClasspath.FormJavaClassPath("-libraryjars"))
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r8Flags = append(r8Flags, flags.classpath.FormJavaClassPath("-libraryjars"))
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r8Deps = append(r8Deps, proguardRaiseDeps...)
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r8Deps = append(r8Deps, flags.bootClasspath...)
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r8Deps = append(r8Deps, flags.classpath...)
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flagFiles := android.Paths{
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android.PathForSource(ctx, "build/make/core/proguard.flags"),
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}
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flagFiles = append(flagFiles, d.extraProguardFlagFiles...)
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// TODO(ccross): static android library proguard files
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flagFiles = append(flagFiles, android.PathsForModuleSrc(ctx, opt.Proguard_flags_files)...)
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r8Flags = append(r8Flags, android.JoinWithPrefix(flagFiles.Strings(), "-include "))
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r8Deps = append(r8Deps, flagFiles...)
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// TODO(b/70942988): This is included from build/make/core/proguard.flags
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r8Deps = append(r8Deps, android.PathForSource(ctx,
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"build/make/core/proguard_basic_keeps.flags"))
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r8Flags = append(r8Flags, opt.Proguard_flags...)
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// TODO(ccross): Don't shrink app instrumentation tests by default.
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if !Bool(opt.Shrink) {
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r8Flags = append(r8Flags, "-dontshrink")
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}
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if !Bool(opt.Optimize) {
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r8Flags = append(r8Flags, "-dontoptimize")
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}
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// TODO(ccross): error if obufscation + app instrumentation test.
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if !Bool(opt.Obfuscate) {
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r8Flags = append(r8Flags, "-dontobfuscate")
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}
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// TODO(ccross): if this is an instrumentation test of an obfuscated app, use the
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// dictionary of the app and move the app from libraryjars to injars.
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// Don't strip out debug information for eng builds.
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if ctx.Config().Eng() {
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r8Flags = append(r8Flags, "--debug")
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}
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return r8Flags, r8Deps
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}
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func (d *dexer) compileDex(ctx android.ModuleContext, flags javaBuilderFlags, minSdkVersion sdkSpec,
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classesJar android.Path, jarName string) android.ModuleOutPath {
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// Compile classes.jar into classes.dex and then javalib.jar
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javalibJar := android.PathForModuleOut(ctx, "dex", jarName)
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outDir := android.PathForModuleOut(ctx, "dex")
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zipFlags := "--ignore_missing_files"
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if proptools.Bool(d.dexProperties.Uncompress_dex) {
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zipFlags += " -L 0"
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}
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commonFlags := d.dexCommonFlags(ctx, minSdkVersion)
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useR8 := d.effectiveOptimizeEnabled()
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if useR8 {
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proguardDictionary := android.PathForModuleOut(ctx, "proguard_dictionary")
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d.proguardDictionary = android.OptionalPathForPath(proguardDictionary)
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proguardUsageDir := android.PathForModuleOut(ctx, "proguard_usage")
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proguardUsage := proguardUsageDir.Join(ctx, ctx.Namespace().Path,
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android.ModuleNameWithPossibleOverride(ctx), "unused.txt")
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proguardUsageZip := android.PathForModuleOut(ctx, "proguard_usage.zip")
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d.proguardUsageZip = android.OptionalPathForPath(proguardUsageZip)
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r8Flags, r8Deps := d.r8Flags(ctx, flags)
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rule := r8
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args := map[string]string{
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"r8Flags": strings.Join(append(commonFlags, r8Flags...), " "),
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"zipFlags": zipFlags,
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"outDict": proguardDictionary.String(),
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"outUsageDir": proguardUsageDir.String(),
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"outUsage": proguardUsage.String(),
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"outUsageZip": proguardUsageZip.String(),
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"outDir": outDir.String(),
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}
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if ctx.Config().IsEnvTrue("RBE_R8") {
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rule = r8RE
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args["implicits"] = strings.Join(r8Deps.Strings(), ",")
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}
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ctx.Build(pctx, android.BuildParams{
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Rule: rule,
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Description: "r8",
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Output: javalibJar,
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ImplicitOutputs: android.WritablePaths{proguardDictionary, proguardUsageZip},
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Input: classesJar,
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Implicits: r8Deps,
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Args: args,
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})
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} else {
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d8Flags, d8Deps := d8Flags(flags)
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rule := d8
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if ctx.Config().IsEnvTrue("RBE_D8") {
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rule = d8RE
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}
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ctx.Build(pctx, android.BuildParams{
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Rule: rule,
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Description: "d8",
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Output: javalibJar,
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Input: classesJar,
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Implicits: d8Deps,
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Args: map[string]string{
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"d8Flags": strings.Join(append(commonFlags, d8Flags...), " "),
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"zipFlags": zipFlags,
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"outDir": outDir.String(),
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},
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})
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}
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if proptools.Bool(d.dexProperties.Uncompress_dex) {
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alignedJavalibJar := android.PathForModuleOut(ctx, "aligned", jarName)
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TransformZipAlign(ctx, alignedJavalibJar, javalibJar)
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javalibJar = alignedJavalibJar
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}
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return javalibJar
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}
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