cc/vendor_snapshot.go - LeafOS-Project/android_build_soong - Gitiles

 // 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 cc

 import (
 	"encoding/json"
 	"path/filepath"
 	"strings"

 	"android/soong/android"
 	"android/soong/snapshot"
 )

 // This file defines how to capture cc modules into snapshot package.

 // Checks if the target image would contain VNDK
 func includeVndk(image snapshot.SnapshotImage) bool {
 	if image.ImageName() == snapshot.VendorSnapshotImageName {
 		return true
 	}

 	return false
 }

 // Check if the module is VNDK private
 func isPrivate(image snapshot.SnapshotImage, m LinkableInterface) bool {
 	if image.ImageName() == snapshot.VendorSnapshotImageName && m.IsVndkPrivate() {
 		return true
 	}

 	return false
 }

 // Checks if target image supports VNDK Ext
 func supportsVndkExt(image snapshot.SnapshotImage) bool {
 	if image.ImageName() == snapshot.VendorSnapshotImageName {
 		return true
 	}

 	return false
 }

 // Determines if the module is a candidate for snapshot.
 func isSnapshotAware(cfg android.DeviceConfig, m LinkableInterface, inProprietaryPath bool, apexInfo android.ApexInfo, image snapshot.SnapshotImage) bool {
 	if !m.Enabled() || m.HiddenFromMake() {
 		return false
 	}
 	// When android/prebuilt.go selects between source and prebuilt, it sets
 	// HideFromMake on the other one to avoid duplicate install rules in make.
 	if m.IsHideFromMake() {
 		return false
 	}
 	// skip proprietary modules, but (for the vendor snapshot only)
 	// include all VNDK (static)
 	if inProprietaryPath && (!includeVndk(image) || !m.IsVndk()) {
 		return false
 	}
 	// If the module would be included based on its path, check to see if
 	// the module is marked to be excluded. If so, skip it.
 	if image.ExcludeFromSnapshot(m) {
 		return false
 	}
 	if m.Target().Os.Class != android.Device {
 		return false
 	}
 	if m.Target().NativeBridge == android.NativeBridgeEnabled {
 		return false
 	}
 	// the module must be installed in target image
 	if !apexInfo.IsForPlatform() || m.IsSnapshotPrebuilt() || !image.InImage(m)() {
 		return false
 	}
 	// skip kernel_headers which always depend on vendor
 	if m.KernelHeadersDecorator() {
 		return false
 	}

 	if m.IsLlndk() {
 		return false
 	}

 	// Libraries
 	if sanitizable, ok := m.(PlatformSanitizeable); ok && sanitizable.IsSnapshotLibrary() {
 		if sanitizable.SanitizePropDefined() {
 			// scs and hwasan export both sanitized and unsanitized variants for static and header
 			// Always use unsanitized variants of them.
 			for _, t := range []SanitizerType{scs, Hwasan} {
 				if !sanitizable.Shared() && sanitizable.IsSanitizerEnabled(t) {
 					return false
 				}
 			}
 			// cfi also exports both variants. But for static, we capture both.
 			// This is because cfi static libraries can't be linked from non-cfi modules,
 			// and vice versa. This isn't the case for scs and hwasan sanitizers.
 			if !sanitizable.Static() && !sanitizable.Shared() && sanitizable.IsSanitizerEnabled(cfi) {
 				return false
 			}
 		}
 		if sanitizable.Static() {
 			return sanitizable.OutputFile().Valid() && !isPrivate(image, m)
 		}
 		if sanitizable.Shared() || sanitizable.Rlib() {
 			if !sanitizable.OutputFile().Valid() {
 				return false
 			}
 			if includeVndk(image) {
 				if !sanitizable.IsVndk() {
 					return true
 				}
 				return sanitizable.IsVndkExt()
 			}
 		}
 		return true
 	}

 	// Binaries and Objects
 	if m.Binary() || m.Object() {
 		return m.OutputFile().Valid()
 	}

 	return false
 }

 // Extend the snapshot.SnapshotJsonFlags to include cc specific fields.
 type snapshotJsonFlags struct {
 	snapshot.SnapshotJsonFlags
 	// library flags
 	ExportedDirs       []string `json:",omitempty"`
 	ExportedSystemDirs []string `json:",omitempty"`
 	ExportedFlags      []string `json:",omitempty"`
 	Sanitize           string   `json:",omitempty"`
 	SanitizeMinimalDep bool     `json:",omitempty"`
 	SanitizeUbsanDep   bool     `json:",omitempty"`

 	// binary flags
 	Symlinks         []string `json:",omitempty"`
 	StaticExecutable bool     `json:",omitempty"`
 	InstallInRoot    bool     `json:",omitempty"`

 	// dependencies
 	SharedLibs  []string `json:",omitempty"`
 	StaticLibs  []string `json:",omitempty"`
 	RuntimeLibs []string `json:",omitempty"`

 	// extra config files
 	InitRc         []string `json:",omitempty"`
 	VintfFragments []string `json:",omitempty"`
 }

 var ccSnapshotAction snapshot.GenerateSnapshotAction = func(s snapshot.SnapshotSingleton, ctx android.SingletonContext, snapshotArchDir string) android.Paths {
 	/*
 		Vendor snapshot zipped artifacts directory structure for cc modules:
 		{SNAPSHOT_ARCH}/
 			arch-{TARGET_ARCH}-{TARGET_ARCH_VARIANT}/
 				shared/
 					(.so shared libraries)
 				static/
 					(.a static libraries)
 				header/
 					(header only libraries)
 				binary/
 					(executable binaries)
 				object/
 					(.o object files)
 			arch-{TARGET_2ND_ARCH}-{TARGET_2ND_ARCH_VARIANT}/
 				shared/
 					(.so shared libraries)
 				static/
 					(.a static libraries)
 				header/
 					(header only libraries)
 				binary/
 					(executable binaries)
 				object/
 					(.o object files)
 			NOTICE_FILES/
 				(notice files, e.g. libbase.txt)
 			configs/
 				(config files, e.g. init.rc files, vintf_fragments.xml files, etc.)
 			include/
 				(header files of same directory structure with source tree)
 	*/

 	var snapshotOutputs android.Paths

 	includeDir := filepath.Join(snapshotArchDir, "include")
 	configsDir := filepath.Join(snapshotArchDir, "configs")
 	noticeDir := filepath.Join(snapshotArchDir, "NOTICE_FILES")

 	installedNotices := make(map[string]bool)
 	installedConfigs := make(map[string]bool)

 	var headers android.Paths

 	copyFile := func(ctx android.SingletonContext, path android.Path, out string, fake bool) android.OutputPath {
 		if fake {
 			// All prebuilt binaries and headers are installed by copyFile function. This makes a fake
 			// snapshot just touch prebuilts and headers, rather than installing real files.
 			return snapshot.WriteStringToFileRule(ctx, "", out)
 		} else {
 			return snapshot.CopyFileRule(pctx, ctx, path, out)
 		}
 	}

 	// installSnapshot function copies prebuilt file (.so, .a, or executable) and json flag file.
 	// For executables, init_rc and vintf_fragments files are also copied.
 	installSnapshot := func(m LinkableInterface, fake bool) android.Paths {
 		targetArch := "arch-" + m.Target().Arch.ArchType.String()
 		if m.Target().Arch.ArchVariant != "" {
 			targetArch += "-" + m.Target().Arch.ArchVariant
 		}

 		var ret android.Paths

 		prop := snapshotJsonFlags{}

 		// Common properties among snapshots.
 		prop.ModuleName = ctx.ModuleName(m)
 		if supportsVndkExt(s.Image) && m.IsVndkExt() {
 			// vndk exts are installed to /vendor/lib(64)?/vndk(-sp)?
 			if m.IsVndkSp() {
 				prop.RelativeInstallPath = "vndk-sp"
 			} else {
 				prop.RelativeInstallPath = "vndk"
 			}
 		} else {
 			prop.RelativeInstallPath = m.RelativeInstallPath()
 		}
 		prop.RuntimeLibs = m.SnapshotRuntimeLibs()
 		prop.Required = m.RequiredModuleNames()
 		for _, path := range m.InitRc() {
 			prop.InitRc = append(prop.InitRc, filepath.Join("configs", path.Base()))
 		}
 		for _, path := range m.VintfFragments() {
 			prop.VintfFragments = append(prop.VintfFragments, filepath.Join("configs", path.Base()))
 		}

 		// install config files. ignores any duplicates.
 		for _, path := range append(m.InitRc(), m.VintfFragments()...) {
 			out := filepath.Join(configsDir, path.Base())
 			if !installedConfigs[out] {
 				installedConfigs[out] = true
 				ret = append(ret, copyFile(ctx, path, out, fake))
 			}
 		}

 		var propOut string

 		if m.IsSnapshotLibrary() {
 			exporterInfo := ctx.ModuleProvider(m.Module(), FlagExporterInfoProvider).(FlagExporterInfo)

 			// library flags
 			prop.ExportedFlags = exporterInfo.Flags
 			for _, dir := range exporterInfo.IncludeDirs {
 				prop.ExportedDirs = append(prop.ExportedDirs, filepath.Join("include", dir.String()))
 			}
 			for _, dir := range exporterInfo.SystemIncludeDirs {
 				prop.ExportedSystemDirs = append(prop.ExportedSystemDirs, filepath.Join("include", dir.String()))
 			}

 			// shared libs dependencies aren't meaningful on static or header libs
 			if m.Shared() {
 				prop.SharedLibs = m.SnapshotSharedLibs()
 			}
 			// static libs dependencies are required to collect the NOTICE files.
 			prop.StaticLibs = m.SnapshotStaticLibs()
 			if sanitizable, ok := m.(PlatformSanitizeable); ok {
 				if sanitizable.Static() && sanitizable.SanitizePropDefined() {
 					prop.SanitizeMinimalDep = sanitizable.MinimalRuntimeDep() || sanitizable.MinimalRuntimeNeeded()
 					prop.SanitizeUbsanDep = sanitizable.UbsanRuntimeDep() || sanitizable.UbsanRuntimeNeeded()
 				}
 			}

 			var libType string
 			if m.Static() {
 				libType = "static"
 			} else if m.Shared() {
 				libType = "shared"
 			} else if m.Rlib() {
 				libType = "rlib"
 			} else {
 				libType = "header"
 			}

 			var stem string

 			// install .a or .so
 			if libType != "header" {
 				libPath := m.OutputFile().Path()
 				stem = libPath.Base()
 				if sanitizable, ok := m.(PlatformSanitizeable); ok {
 					if (sanitizable.Static() || sanitizable.Rlib()) && sanitizable.SanitizePropDefined() && sanitizable.IsSanitizerEnabled(cfi) {
 						// both cfi and non-cfi variant for static libraries can exist.
 						// attach .cfi to distinguish between cfi and non-cfi.
 						// e.g. libbase.a -> libbase.cfi.a
 						ext := filepath.Ext(stem)
 						stem = strings.TrimSuffix(stem, ext) + ".cfi" + ext
 						prop.Sanitize = "cfi"
 						prop.ModuleName += ".cfi"
 					}
 				}
 				snapshotLibOut := filepath.Join(snapshotArchDir, targetArch, libType, stem)
 				ret = append(ret, copyFile(ctx, libPath, snapshotLibOut, fake))
 			} else {
 				stem = ctx.ModuleName(m)
 			}

 			propOut = filepath.Join(snapshotArchDir, targetArch, libType, stem+".json")
 		} else if m.Binary() {
 			// binary flags
 			prop.Symlinks = m.Symlinks()
 			prop.StaticExecutable = m.StaticExecutable()
 			prop.InstallInRoot = m.InstallInRoot()
 			prop.SharedLibs = m.SnapshotSharedLibs()
 			// static libs dependencies are required to collect the NOTICE files.
 			prop.StaticLibs = m.SnapshotStaticLibs()
 			// install bin
 			binPath := m.OutputFile().Path()
 			snapshotBinOut := filepath.Join(snapshotArchDir, targetArch, "binary", binPath.Base())
 			ret = append(ret, copyFile(ctx, binPath, snapshotBinOut, fake))
 			propOut = snapshotBinOut + ".json"
 		} else if m.Object() {
 			// object files aren't installed to the device, so their names can conflict.
 			// Use module name as stem.
 			objPath := m.OutputFile().Path()
 			snapshotObjOut := filepath.Join(snapshotArchDir, targetArch, "object",
 				ctx.ModuleName(m)+filepath.Ext(objPath.Base()))
 			ret = append(ret, copyFile(ctx, objPath, snapshotObjOut, fake))
 			propOut = snapshotObjOut + ".json"
 		} else {
 			ctx.Errorf("unknown module %q in vendor snapshot", m.String())
 			return nil
 		}

 		j, err := json.Marshal(prop)
 		if err != nil {
 			ctx.Errorf("json marshal to %q failed: %#v", propOut, err)
 			return nil
 		}
 		ret = append(ret, snapshot.WriteStringToFileRule(ctx, string(j), propOut))

 		return ret
 	}

 	ctx.VisitAllModules(func(module android.Module) {
 		m, ok := module.(LinkableInterface)
 		if !ok {
 			return
 		}

 		moduleDir := ctx.ModuleDir(module)
 		inProprietaryPath := s.Image.IsProprietaryPath(moduleDir, ctx.DeviceConfig())
 		apexInfo := ctx.ModuleProvider(module, android.ApexInfoProvider).(android.ApexInfo)

 		if s.Image.ExcludeFromSnapshot(m) {
 			if inProprietaryPath {
 				// Error: exclude_from_vendor_snapshot applies
 				// to framework-path modules only.
 				ctx.Errorf("module %q in vendor proprietary path %q may not use \"exclude_from_vendor_snapshot: true\"", m.String(), moduleDir)
 				return
 			}
 		}

 		if !isSnapshotAware(ctx.DeviceConfig(), m, inProprietaryPath, apexInfo, s.Image) {
 			return
 		}

 		// If we are using directed snapshot and a module is not included in the
 		// list, we will still include the module as if it was a fake module.
 		// The reason is that soong needs all the dependencies to be present, even
 		// if they are not using during the build.
 		installAsFake := s.Fake
 		if s.Image.ExcludeFromDirectedSnapshot(ctx.DeviceConfig(), m.BaseModuleName()) {
 			installAsFake = true
 		}

 		// installSnapshot installs prebuilts and json flag files
 		snapshotOutputs = append(snapshotOutputs, installSnapshot(m, installAsFake)...)
 		// just gather headers and notice files here, because they are to be deduplicated
 		if m.IsSnapshotLibrary() {
 			headers = append(headers, m.SnapshotHeaders()...)
 		}

 		if len(m.EffectiveLicenseFiles()) > 0 {
 			noticeName := ctx.ModuleName(m) + ".txt"
 			noticeOut := filepath.Join(noticeDir, noticeName)
 			// skip already copied notice file
 			if !installedNotices[noticeOut] {
 				installedNotices[noticeOut] = true
 				snapshotOutputs = append(snapshotOutputs, combineNoticesRule(ctx, m.EffectiveLicenseFiles(), noticeOut))
 			}
 		}
 	})

 	// install all headers after removing duplicates
 	for _, header := range android.FirstUniquePaths(headers) {
 		snapshotOutputs = append(snapshotOutputs, copyFile(ctx, header, filepath.Join(includeDir, header.String()), s.Fake))
 	}

 	return snapshotOutputs
 }

 func init() {
 	snapshot.RegisterSnapshotAction(ccSnapshotAction)
 }
	// 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 cc

	import (
	"encoding/json"
	"path/filepath"
	"strings"

	"android/soong/android"
	"android/soong/snapshot"
	)

	// This file defines how to capture cc modules into snapshot package.

	// Checks if the target image would contain VNDK
	func includeVndk(image snapshot.SnapshotImage) bool {
	if image.ImageName() == snapshot.VendorSnapshotImageName {
	return true
	}

	return false
	}

	// Check if the module is VNDK private
	func isPrivate(image snapshot.SnapshotImage, m LinkableInterface) bool {
	if image.ImageName() == snapshot.VendorSnapshotImageName && m.IsVndkPrivate() {
	return true
	}

	return false
	}

	// Checks if target image supports VNDK Ext
	func supportsVndkExt(image snapshot.SnapshotImage) bool {
	if image.ImageName() == snapshot.VendorSnapshotImageName {
	return true
	}

	return false
	}

	// Determines if the module is a candidate for snapshot.
	func isSnapshotAware(cfg android.DeviceConfig, m LinkableInterface, inProprietaryPath bool, apexInfo android.ApexInfo, image snapshot.SnapshotImage) bool {
	if !m.Enabled() \|\| m.HiddenFromMake() {
	return false
	}
	// When android/prebuilt.go selects between source and prebuilt, it sets
	// HideFromMake on the other one to avoid duplicate install rules in make.
	if m.IsHideFromMake() {
	return false
	}
	// skip proprietary modules, but (for the vendor snapshot only)
	// include all VNDK (static)
	if inProprietaryPath && (!includeVndk(image) \|\| !m.IsVndk()) {
	return false
	}
	// If the module would be included based on its path, check to see if
	// the module is marked to be excluded. If so, skip it.
	if image.ExcludeFromSnapshot(m) {
	return false
	}
	if m.Target().Os.Class != android.Device {
	return false
	}
	if m.Target().NativeBridge == android.NativeBridgeEnabled {
	return false
	}
	// the module must be installed in target image
	if !apexInfo.IsForPlatform() \|\| m.IsSnapshotPrebuilt() \|\| !image.InImage(m)() {
	return false
	}
	// skip kernel_headers which always depend on vendor
	if m.KernelHeadersDecorator() {
	return false
	}

	if m.IsLlndk() {
	return false
	}

	// Libraries
	if sanitizable, ok := m.(PlatformSanitizeable); ok && sanitizable.IsSnapshotLibrary() {
	if sanitizable.SanitizePropDefined() {
	// scs and hwasan export both sanitized and unsanitized variants for static and header
	// Always use unsanitized variants of them.
	for _, t := range []SanitizerType{scs, Hwasan} {
	if !sanitizable.Shared() && sanitizable.IsSanitizerEnabled(t) {
	return false
	}
	}
	// cfi also exports both variants. But for static, we capture both.
	// This is because cfi static libraries can't be linked from non-cfi modules,
	// and vice versa. This isn't the case for scs and hwasan sanitizers.
	if !sanitizable.Static() && !sanitizable.Shared() && sanitizable.IsSanitizerEnabled(cfi) {
	return false
	}
	}
	if sanitizable.Static() {
	return sanitizable.OutputFile().Valid() && !isPrivate(image, m)
	}
	if sanitizable.Shared() \|\| sanitizable.Rlib() {
	if !sanitizable.OutputFile().Valid() {
	return false
	}
	if includeVndk(image) {
	if !sanitizable.IsVndk() {
	return true
	}
	return sanitizable.IsVndkExt()
	}
	}
	return true
	}

	// Binaries and Objects
	if m.Binary() \|\| m.Object() {
	return m.OutputFile().Valid()
	}

	return false
	}

	// Extend the snapshot.SnapshotJsonFlags to include cc specific fields.
	type snapshotJsonFlags struct {
	snapshot.SnapshotJsonFlags
	// library flags
	ExportedDirs []string `json:",omitempty"`
	ExportedSystemDirs []string `json:",omitempty"`
	ExportedFlags []string `json:",omitempty"`
	Sanitize string `json:",omitempty"`
	SanitizeMinimalDep bool `json:",omitempty"`
	SanitizeUbsanDep bool `json:",omitempty"`

	// binary flags
	Symlinks []string `json:",omitempty"`
	StaticExecutable bool `json:",omitempty"`
	InstallInRoot bool `json:",omitempty"`

	// dependencies
	SharedLibs []string `json:",omitempty"`
	StaticLibs []string `json:",omitempty"`
	RuntimeLibs []string `json:",omitempty"`

	// extra config files
	InitRc []string `json:",omitempty"`
	VintfFragments []string `json:",omitempty"`
	}

	var ccSnapshotAction snapshot.GenerateSnapshotAction = func(s snapshot.SnapshotSingleton, ctx android.SingletonContext, snapshotArchDir string) android.Paths {
	/*
	Vendor snapshot zipped artifacts directory structure for cc modules:
	{SNAPSHOT_ARCH}/
	arch-{TARGET_ARCH}-{TARGET_ARCH_VARIANT}/
	shared/
	(.so shared libraries)
	static/
	(.a static libraries)
	header/
	(header only libraries)
	binary/
	(executable binaries)
	object/
	(.o object files)
	arch-{TARGET_2ND_ARCH}-{TARGET_2ND_ARCH_VARIANT}/
	shared/
	(.so shared libraries)
	static/
	(.a static libraries)
	header/
	(header only libraries)
	binary/
	(executable binaries)
	object/
	(.o object files)
	NOTICE_FILES/
	(notice files, e.g. libbase.txt)
	configs/
	(config files, e.g. init.rc files, vintf_fragments.xml files, etc.)
	include/
	(header files of same directory structure with source tree)
	*/

	var snapshotOutputs android.Paths

	includeDir := filepath.Join(snapshotArchDir, "include")
	configsDir := filepath.Join(snapshotArchDir, "configs")
	noticeDir := filepath.Join(snapshotArchDir, "NOTICE_FILES")

	installedNotices := make(map[string]bool)
	installedConfigs := make(map[string]bool)

	var headers android.Paths

	copyFile := func(ctx android.SingletonContext, path android.Path, out string, fake bool) android.OutputPath {
	if fake {
	// All prebuilt binaries and headers are installed by copyFile function. This makes a fake
	// snapshot just touch prebuilts and headers, rather than installing real files.
	return snapshot.WriteStringToFileRule(ctx, "", out)
	} else {
	return snapshot.CopyFileRule(pctx, ctx, path, out)
	}
	}

	// installSnapshot function copies prebuilt file (.so, .a, or executable) and json flag file.
	// For executables, init_rc and vintf_fragments files are also copied.
	installSnapshot := func(m LinkableInterface, fake bool) android.Paths {
	targetArch := "arch-" + m.Target().Arch.ArchType.String()
	if m.Target().Arch.ArchVariant != "" {
	targetArch += "-" + m.Target().Arch.ArchVariant
	}

	var ret android.Paths

	prop := snapshotJsonFlags{}

	// Common properties among snapshots.
	prop.ModuleName = ctx.ModuleName(m)
	if supportsVndkExt(s.Image) && m.IsVndkExt() {
	// vndk exts are installed to /vendor/lib(64)?/vndk(-sp)?
	if m.IsVndkSp() {
	prop.RelativeInstallPath = "vndk-sp"
	} else {
	prop.RelativeInstallPath = "vndk"
	}
	} else {
	prop.RelativeInstallPath = m.RelativeInstallPath()
	}
	prop.RuntimeLibs = m.SnapshotRuntimeLibs()
	prop.Required = m.RequiredModuleNames()
	for _, path := range m.InitRc() {
	prop.InitRc = append(prop.InitRc, filepath.Join("configs", path.Base()))
	}
	for _, path := range m.VintfFragments() {
	prop.VintfFragments = append(prop.VintfFragments, filepath.Join("configs", path.Base()))
	}

	// install config files. ignores any duplicates.
	for _, path := range append(m.InitRc(), m.VintfFragments()...) {
	out := filepath.Join(configsDir, path.Base())
	if !installedConfigs[out] {
	installedConfigs[out] = true
	ret = append(ret, copyFile(ctx, path, out, fake))
	}
	}

	var propOut string

	if m.IsSnapshotLibrary() {
	exporterInfo := ctx.ModuleProvider(m.Module(), FlagExporterInfoProvider).(FlagExporterInfo)

	// library flags
	prop.ExportedFlags = exporterInfo.Flags
	for _, dir := range exporterInfo.IncludeDirs {
	prop.ExportedDirs = append(prop.ExportedDirs, filepath.Join("include", dir.String()))
	}
	for _, dir := range exporterInfo.SystemIncludeDirs {
	prop.ExportedSystemDirs = append(prop.ExportedSystemDirs, filepath.Join("include", dir.String()))
	}

	// shared libs dependencies aren't meaningful on static or header libs
	if m.Shared() {
	prop.SharedLibs = m.SnapshotSharedLibs()
	}
	// static libs dependencies are required to collect the NOTICE files.
	prop.StaticLibs = m.SnapshotStaticLibs()
	if sanitizable, ok := m.(PlatformSanitizeable); ok {
	if sanitizable.Static() && sanitizable.SanitizePropDefined() {
	prop.SanitizeMinimalDep = sanitizable.MinimalRuntimeDep() \|\| sanitizable.MinimalRuntimeNeeded()
	prop.SanitizeUbsanDep = sanitizable.UbsanRuntimeDep() \|\| sanitizable.UbsanRuntimeNeeded()
	}
	}

	var libType string
	if m.Static() {
	libType = "static"
	} else if m.Shared() {
	libType = "shared"
	} else if m.Rlib() {
	libType = "rlib"
	} else {
	libType = "header"
	}

	var stem string

	// install .a or .so
	if libType != "header" {
	libPath := m.OutputFile().Path()
	stem = libPath.Base()
	if sanitizable, ok := m.(PlatformSanitizeable); ok {
	if (sanitizable.Static() \|\| sanitizable.Rlib()) && sanitizable.SanitizePropDefined() && sanitizable.IsSanitizerEnabled(cfi) {
	// both cfi and non-cfi variant for static libraries can exist.
	// attach .cfi to distinguish between cfi and non-cfi.
	// e.g. libbase.a -> libbase.cfi.a
	ext := filepath.Ext(stem)
	stem = strings.TrimSuffix(stem, ext) + ".cfi" + ext
	prop.Sanitize = "cfi"
	prop.ModuleName += ".cfi"
	}
	}
	snapshotLibOut := filepath.Join(snapshotArchDir, targetArch, libType, stem)
	ret = append(ret, copyFile(ctx, libPath, snapshotLibOut, fake))
	} else {
	stem = ctx.ModuleName(m)
	}

	propOut = filepath.Join(snapshotArchDir, targetArch, libType, stem+".json")
	} else if m.Binary() {
	// binary flags
	prop.Symlinks = m.Symlinks()
	prop.StaticExecutable = m.StaticExecutable()
	prop.InstallInRoot = m.InstallInRoot()
	prop.SharedLibs = m.SnapshotSharedLibs()
	// static libs dependencies are required to collect the NOTICE files.
	prop.StaticLibs = m.SnapshotStaticLibs()
	// install bin
	binPath := m.OutputFile().Path()
	snapshotBinOut := filepath.Join(snapshotArchDir, targetArch, "binary", binPath.Base())
	ret = append(ret, copyFile(ctx, binPath, snapshotBinOut, fake))
	propOut = snapshotBinOut + ".json"
	} else if m.Object() {
	// object files aren't installed to the device, so their names can conflict.
	// Use module name as stem.
	objPath := m.OutputFile().Path()
	snapshotObjOut := filepath.Join(snapshotArchDir, targetArch, "object",
	ctx.ModuleName(m)+filepath.Ext(objPath.Base()))
	ret = append(ret, copyFile(ctx, objPath, snapshotObjOut, fake))
	propOut = snapshotObjOut + ".json"
	} else {
	ctx.Errorf("unknown module %q in vendor snapshot", m.String())
	return nil
	}

	j, err := json.Marshal(prop)
	if err != nil {
	ctx.Errorf("json marshal to %q failed: %#v", propOut, err)
	return nil
	}
	ret = append(ret, snapshot.WriteStringToFileRule(ctx, string(j), propOut))

	return ret
	}

	ctx.VisitAllModules(func(module android.Module) {
	m, ok := module.(LinkableInterface)
	if !ok {
	return
	}

	moduleDir := ctx.ModuleDir(module)
	inProprietaryPath := s.Image.IsProprietaryPath(moduleDir, ctx.DeviceConfig())
	apexInfo := ctx.ModuleProvider(module, android.ApexInfoProvider).(android.ApexInfo)

	if s.Image.ExcludeFromSnapshot(m) {
	if inProprietaryPath {
	// Error: exclude_from_vendor_snapshot applies
	// to framework-path modules only.
	ctx.Errorf("module %q in vendor proprietary path %q may not use \"exclude_from_vendor_snapshot: true\"", m.String(), moduleDir)
	return
	}
	}

	if !isSnapshotAware(ctx.DeviceConfig(), m, inProprietaryPath, apexInfo, s.Image) {
	return
	}

	// If we are using directed snapshot and a module is not included in the
	// list, we will still include the module as if it was a fake module.
	// The reason is that soong needs all the dependencies to be present, even
	// if they are not using during the build.
	installAsFake := s.Fake
	if s.Image.ExcludeFromDirectedSnapshot(ctx.DeviceConfig(), m.BaseModuleName()) {
	installAsFake = true
	}

	// installSnapshot installs prebuilts and json flag files
	snapshotOutputs = append(snapshotOutputs, installSnapshot(m, installAsFake)...)
	// just gather headers and notice files here, because they are to be deduplicated
	if m.IsSnapshotLibrary() {
	headers = append(headers, m.SnapshotHeaders()...)
	}

	if len(m.EffectiveLicenseFiles()) > 0 {
	noticeName := ctx.ModuleName(m) + ".txt"
	noticeOut := filepath.Join(noticeDir, noticeName)
	// skip already copied notice file
	if !installedNotices[noticeOut] {
	installedNotices[noticeOut] = true
	snapshotOutputs = append(snapshotOutputs, combineNoticesRule(ctx, m.EffectiveLicenseFiles(), noticeOut))
	}
	}
	})

	// install all headers after removing duplicates
	for _, header := range android.FirstUniquePaths(headers) {
	snapshotOutputs = append(snapshotOutputs, copyFile(ctx, header, filepath.Join(includeDir, header.String()), s.Fake))
	}

	return snapshotOutputs
	}

	func init() {
	snapshot.RegisterSnapshotAction(ccSnapshotAction)
	}