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// Copyright 2019 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"
"android/soong/android"
)
var hiddenAPIGenerateCSVRule = pctx.AndroidStaticRule("hiddenAPIGenerateCSV", blueprint.RuleParams{
Command: "${config.Class2NonSdkList} --stub-api-flags ${stubAPIFlags} $in $outFlag $out",
CommandDeps: []string{"${config.Class2NonSdkList}"},
}, "outFlag", "stubAPIFlags")
type hiddenAPI struct {
// True if the module containing this structure contributes to the hiddenapi information or has
// that information encoded within it.
active bool
// The path to the dex jar that is in the boot class path. If this is unset then the associated
// module is not a boot jar, but could be one of the <x>-hiddenapi modules that provide additional
// annotations for the <x> boot dex jar but which do not actually provide a boot dex jar
// themselves.
//
// This must be the path to the unencoded dex jar as the encoded dex jar indirectly depends on
// this file so using the encoded dex jar here would result in a cycle in the ninja rules.
bootDexJarPath OptionalDexJarPath
// The paths to the classes jars that contain classes and class members annotated with
// the UnsupportedAppUsage annotation that need to be extracted as part of the hidden API
// processing.
classesJarPaths android.Paths
// The compressed state of the dex file being encoded. This is used to ensure that the encoded
// dex file has the same state.
uncompressDexState *bool
}
func (h *hiddenAPI) bootDexJar() OptionalDexJarPath {
return h.bootDexJarPath
}
func (h *hiddenAPI) classesJars() android.Paths {
return h.classesJarPaths
}
func (h *hiddenAPI) uncompressDex() *bool {
return h.uncompressDexState
}
// hiddenAPIModule is the interface a module that embeds the hiddenAPI structure must implement.
type hiddenAPIModule interface {
android.Module
hiddenAPIIntf
}
type hiddenAPIIntf interface {
bootDexJar() OptionalDexJarPath
classesJars() android.Paths
uncompressDex() *bool
}
var _ hiddenAPIIntf = (*hiddenAPI)(nil)
// Initialize the hiddenapi structure
//
// uncompressedDexState should be nil when the module is a prebuilt and so does not require hidden
// API encoding.
func (h *hiddenAPI) initHiddenAPI(ctx android.ModuleContext, dexJar OptionalDexJarPath, classesJar android.Path, uncompressedDexState *bool) {
// Save the classes jars even if this is not active as they may be used by modular hidden API
// processing.
classesJars := android.Paths{classesJar}
ctx.VisitDirectDepsWithTag(hiddenApiAnnotationsTag, func(dep android.Module) {
javaInfo := ctx.OtherModuleProvider(dep, JavaInfoProvider).(JavaInfo)
classesJars = append(classesJars, javaInfo.ImplementationJars...)
})
h.classesJarPaths = classesJars
// Save the unencoded dex jar so it can be used when generating the
// hiddenAPISingletonPathsStruct.stubFlags file.
h.bootDexJarPath = dexJar
h.uncompressDexState = uncompressedDexState
// If hiddenapi processing is disabled treat this as inactive.
if ctx.Config().IsEnvTrue("UNSAFE_DISABLE_HIDDENAPI_FLAGS") {
return
}
// The context module must implement hiddenAPIModule.
module := ctx.Module().(hiddenAPIModule)
// If the frameworks/base directories does not exist and no prebuilt hidden API flag files have
// been configured then it is not possible to do hidden API encoding.
if !ctx.Config().FrameworksBaseDirExists(ctx) && ctx.Config().PrebuiltHiddenApiDir(ctx) == "" {
return
}
// It is important that hiddenapi information is only gathered for/from modules that are actually
// on the boot jars list because the runtime only enforces access to the hidden API for the
// bootclassloader. If information is gathered for modules not on the list then that will cause
// failures in the CtsHiddenApiBlocklist... tests.
h.active = isModuleInBootClassPath(ctx, module)
}
func isModuleInBootClassPath(ctx android.BaseModuleContext, module android.Module) bool {
// Get the configured platform and apex boot jars.
nonApexBootJars := ctx.Config().NonApexBootJars()
apexBootJars := ctx.Config().ApexBootJars()
active := isModuleInConfiguredList(ctx, module, nonApexBootJars) ||
isModuleInConfiguredList(ctx, module, apexBootJars)
return active
}
// hiddenAPIEncodeDex is called by any module that needs to encode dex files.
//
// It ignores any module that has not had initHiddenApi() called on it and which is not in the boot
// jar list. In that case it simply returns the supplied dex jar path.
//
// Otherwise, it creates a copy of the supplied dex file into which it has encoded the hiddenapi
// flags and returns this instead of the supplied dex jar.
func (h *hiddenAPI) hiddenAPIEncodeDex(ctx android.ModuleContext, dexJar android.OutputPath) android.OutputPath {
if !h.active {
return dexJar
}
// A nil uncompressDexState prevents the dex file from being encoded.
if h.uncompressDexState == nil {
ctx.ModuleErrorf("cannot encode dex file %s when uncompressDexState is nil", dexJar)
}
uncompressDex := *h.uncompressDexState
// Create a copy of the dex jar which has been encoded with hiddenapi flags.
flagsCSV := hiddenAPISingletonPaths(ctx).flags
outputDir := android.PathForModuleOut(ctx, "hiddenapi").OutputPath
encodedDex := hiddenAPIEncodeDex(ctx, dexJar, flagsCSV, uncompressDex, outputDir)
// Use the encoded dex jar from here onwards.
return encodedDex
}
// buildRuleToGenerateAnnotationFlags builds a ninja rule to generate the annotation-flags.csv file
// from the classes jars and stub-flags.csv files.
//
// The annotation-flags.csv file contains mappings from Java signature to various flags derived from
// annotations in the source, e.g. whether it is public or the sdk version above which it can no
// longer be used.
//
// It is created by the Class2NonSdkList tool which processes the .class files in the class
// implementation jar looking for UnsupportedAppUsage and CovariantReturnType annotations. The
// tool also consumes the hiddenAPISingletonPathsStruct.stubFlags file in order to perform
// consistency checks on the information in the annotations and to filter out bridge methods
// that are already part of the public API.
func buildRuleToGenerateAnnotationFlags(ctx android.ModuleContext, desc string, classesJars android.Paths, stubFlagsCSV android.Path, outputPath android.WritablePath) {
ctx.Build(pctx, android.BuildParams{
Rule: hiddenAPIGenerateCSVRule,
Description: desc,
Inputs: classesJars,
Output: outputPath,
Implicit: stubFlagsCSV,
Args: map[string]string{
"outFlag": "--write-flags-csv",
"stubAPIFlags": stubFlagsCSV.String(),
},
})
}
// buildRuleToGenerateMetadata builds a ninja rule to generate the metadata.csv file from
// the classes jars and stub-flags.csv files.
//
// The metadata.csv file contains mappings from Java signature to the value of properties specified
// on UnsupportedAppUsage annotations in the source.
//
// Like the annotation-flags.csv file this is also created by the Class2NonSdkList in the same way.
// Although the two files could potentially be created in a single invocation of the
// Class2NonSdkList at the moment they are created using their own invocation, with the behavior
// being determined by the property that is used.
func buildRuleToGenerateMetadata(ctx android.ModuleContext, desc string, classesJars android.Paths, stubFlagsCSV android.Path, metadataCSV android.WritablePath) {
ctx.Build(pctx, android.BuildParams{
Rule: hiddenAPIGenerateCSVRule,
Description: desc,
Inputs: classesJars,
Output: metadataCSV,
Implicit: stubFlagsCSV,
Args: map[string]string{
"outFlag": "--write-metadata-csv",
"stubAPIFlags": stubFlagsCSV.String(),
},
})
}
// buildRuleToGenerateIndex builds a ninja rule to generate the index.csv file from the classes
// jars.
//
// The index.csv file contains mappings from Java signature to source location information.
//
// It is created by the merge_csv tool which processes the class implementation jar, extracting
// all the files ending in .uau (which are CSV files) and merges them together. The .uau files are
// created by the unsupported app usage annotation processor during compilation of the class
// implementation jar.
func buildRuleToGenerateIndex(ctx android.ModuleContext, desc string, classesJars android.Paths, indexCSV android.WritablePath) {
rule := android.NewRuleBuilder(pctx, ctx)
rule.Command().
BuiltTool("merge_csv").
Flag("--zip_input").
Flag("--key_field signature").
FlagWithOutput("--output=", indexCSV).
Inputs(classesJars)
rule.Build(desc, desc)
}
var hiddenAPIEncodeDexRule = pctx.AndroidStaticRule("hiddenAPIEncodeDex", blueprint.RuleParams{
Command: `rm -rf $tmpDir && mkdir -p $tmpDir && mkdir $tmpDir/dex-input && mkdir $tmpDir/dex-output &&
unzip -qoDD $in 'classes*.dex' -d $tmpDir/dex-input &&
for INPUT_DEX in $$(find $tmpDir/dex-input -maxdepth 1 -name 'classes*.dex' | sort); do
echo "--input-dex=$${INPUT_DEX}";
echo "--output-dex=$tmpDir/dex-output/$$(basename $${INPUT_DEX})";
done | xargs ${config.HiddenAPI} encode --api-flags=$flagsCsv $hiddenapiFlags &&
${config.SoongZipCmd} $soongZipFlags -o $tmpDir/dex.jar -C $tmpDir/dex-output -f "$tmpDir/dex-output/classes*.dex" &&
${config.MergeZipsCmd} -j -D -zipToNotStrip $tmpDir/dex.jar -stripFile "classes*.dex" -stripFile "**/*.uau" $out $tmpDir/dex.jar $in`,
CommandDeps: []string{
"${config.HiddenAPI}",
"${config.SoongZipCmd}",
"${config.MergeZipsCmd}",
},
}, "flagsCsv", "hiddenapiFlags", "tmpDir", "soongZipFlags")
// hiddenAPIEncodeDex generates the build rule that will encode the supplied dex jar and place the
// encoded dex jar in a file of the same name in the output directory.
//
// The encode dex rule requires unzipping, encoding and rezipping the classes.dex files along with
// all the resources from the input jar. It also ensures that if it was uncompressed in the input
// it stays uncompressed in the output.
func hiddenAPIEncodeDex(ctx android.ModuleContext, dexInput, flagsCSV android.Path, uncompressDex bool, outputDir android.OutputPath) android.OutputPath {
// The output file has the same name as the input file and is in the output directory.
output := outputDir.Join(ctx, dexInput.Base())
// Create a jar specific temporary directory in which to do the work just in case this is called
// with the same output directory for multiple modules.
tmpDir := outputDir.Join(ctx, dexInput.Base()+"-tmp")
// If the input is uncompressed then generate the output of the encode rule to an intermediate
// file as the final output will need further processing after encoding.
soongZipFlags := ""
encodeRuleOutput := output
if uncompressDex {
soongZipFlags = "-L 0"
encodeRuleOutput = outputDir.Join(ctx, "unaligned", dexInput.Base())
}
// b/149353192: when a module is instrumented, jacoco adds synthetic members
// $jacocoData and $jacocoInit. Since they don't exist when building the hidden API flags,
// don't complain when we don't find hidden API flags for the synthetic members.
hiddenapiFlags := ""
if j, ok := ctx.Module().(interface {
shouldInstrument(android.BaseModuleContext) bool
}); ok && j.shouldInstrument(ctx) {
hiddenapiFlags = "--no-force-assign-all"
}
ctx.Build(pctx, android.BuildParams{
Rule: hiddenAPIEncodeDexRule,
Description: "hiddenapi encode dex",
Input: dexInput,
Output: encodeRuleOutput,
Implicit: flagsCSV,
Args: map[string]string{
"flagsCsv": flagsCSV.String(),
"tmpDir": tmpDir.String(),
"soongZipFlags": soongZipFlags,
"hiddenapiFlags": hiddenapiFlags,
},
})
if uncompressDex {
TransformZipAlign(ctx, output, encodeRuleOutput)
}
return output
}
type hiddenApiAnnotationsDependencyTag struct {
blueprint.BaseDependencyTag
}
// Tag used to mark dependencies on java_library instances that contains Java source files whose
// sole purpose is to provide additional hiddenapi annotations.
var hiddenApiAnnotationsTag hiddenApiAnnotationsDependencyTag
// Mark this tag so dependencies that use it are excluded from APEX contents.
func (t hiddenApiAnnotationsDependencyTag) ExcludeFromApexContents() {}
var _ android.ExcludeFromApexContentsTag = hiddenApiAnnotationsTag