0fbbc2b0d4
android_system_image filers packaging items installed outside "system" partition. Some packaging items install related items to different partitions but putting them altogether to android_system_image doesn't make sense. (android_system_image is suppposed to be "system" partition) To be specific, this filters out "apex" partition items. "apex" partition is used by APEX installation to install APEX contents to paths similar to activated paths on device so that symbol lookup works well with APEX contents. Bug: 225121718 Test: atest MicrodroidHostTestCases Test: debugfs <intermediate>/microdroid.img -R 'ls system' shows no "com.android.runtime" Change-Id: Ibc3d85ead2fda99e231132ce8ab9ccf1cc9317b7
82 lines
2.8 KiB
Go
82 lines
2.8 KiB
Go
// Copyright (C) 2021 The Android Open Source Project
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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 filesystem
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import (
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"android/soong/android"
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"android/soong/linkerconfig"
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)
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type systemImage struct {
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filesystem
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properties systemImageProperties
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}
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type systemImageProperties struct {
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// Path to the input linker config json file.
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Linker_config_src *string
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}
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// android_system_image is a specialization of android_filesystem for the 'system' partition.
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// Currently, the only difference is the inclusion of linker.config.pb file which specifies
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// the provided and the required libraries to and from APEXes.
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func systemImageFactory() android.Module {
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module := &systemImage{}
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module.AddProperties(&module.properties)
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module.filesystem.buildExtraFiles = module.buildExtraFiles
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module.filesystem.filterPackagingSpecs = module.filterPackagingSpecs
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initFilesystemModule(&module.filesystem)
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return module
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}
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func (s *systemImage) buildExtraFiles(ctx android.ModuleContext, root android.OutputPath) android.OutputPaths {
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lc := s.buildLinkerConfigFile(ctx, root)
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// Add more files if needed
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return []android.OutputPath{lc}
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}
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func (s *systemImage) buildLinkerConfigFile(ctx android.ModuleContext, root android.OutputPath) android.OutputPath {
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input := android.PathForModuleSrc(ctx, android.String(s.properties.Linker_config_src))
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output := root.Join(ctx, "system", "etc", "linker.config.pb")
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// we need "Module"s for packaging items
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var otherModules []android.Module
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deps := s.gatherFilteredPackagingSpecs(ctx)
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ctx.WalkDeps(func(child, parent android.Module) bool {
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for _, ps := range child.PackagingSpecs() {
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if _, ok := deps[ps.RelPathInPackage()]; ok {
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otherModules = append(otherModules, child)
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}
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}
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return true
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})
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builder := android.NewRuleBuilder(pctx, ctx)
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linkerconfig.BuildLinkerConfig(ctx, builder, input, otherModules, output)
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builder.Build("conv_linker_config", "Generate linker config protobuf "+output.String())
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return output
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}
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// Filter the result of GatherPackagingSpecs to discard items targeting outside "system" partition.
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// Note that "apex" module installs its contents to "apex"(fake partition) as well
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// for symbol lookup by imitating "activated" paths.
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func (s *systemImage) filterPackagingSpecs(specs map[string]android.PackagingSpec) {
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for k, ps := range specs {
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if ps.Partition() != "system" {
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delete(specs, k)
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}
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}
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}
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