c66baf70f6
We are bringing up support for ARM Memory Tagging Extension in the platform, but the required patches have not yet landed in the upstream kernel. This change adds support for a product variable that products may set to true to declare support for an experimental userspace interface to MTE. Setting the variable to true causes a product configuration to be enabled which will activate code in bionic and scudo that uses the interface. This variable should not be set to true in shipping products because the userspace interface has not been finalized and is subject to change. Once the support patches have landed in the kernel, bionic and scudo will be changed to use the official interface and the variable will be removed. Bug: 135772972 Change-Id: I8ba5dea4de374eb6775edb6d4e3c0cf9cad8d760
612 lines
20 KiB
Go
612 lines
20 KiB
Go
// Copyright 2015 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 android
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import (
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"fmt"
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"reflect"
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"runtime"
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"strings"
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"github.com/google/blueprint/proptools"
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)
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func init() {
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PreDepsMutators(func(ctx RegisterMutatorsContext) {
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ctx.BottomUp("variable", variableMutator).Parallel()
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})
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}
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type variableProperties struct {
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Product_variables struct {
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Platform_sdk_version struct {
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Asflags []string
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Cflags []string
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}
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// unbundled_build is a catch-all property to annotate modules that don't build in one or
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// more unbundled branches, usually due to dependencies missing from the manifest.
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Unbundled_build struct {
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Enabled *bool `android:"arch_variant"`
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} `android:"arch_variant"`
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Malloc_not_svelte struct {
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Cflags []string `android:"arch_variant"`
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Shared_libs []string `android:"arch_variant"`
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} `android:"arch_variant"`
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Safestack struct {
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Cflags []string `android:"arch_variant"`
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} `android:"arch_variant"`
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Binder32bit struct {
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Cflags []string
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}
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Override_rs_driver struct {
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Cflags []string
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}
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// treble_linker_namespaces is true when the system/vendor linker namespace separation is
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// enabled.
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Treble_linker_namespaces struct {
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Cflags []string
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}
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// enforce_vintf_manifest is true when a device is required to have a vintf manifest.
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Enforce_vintf_manifest struct {
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Cflags []string
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}
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// debuggable is true for eng and userdebug builds, and can be used to turn on additional
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// debugging features that don't significantly impact runtime behavior. userdebug builds
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// are used for dogfooding and performance testing, and should be as similar to user builds
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// as possible.
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Debuggable struct {
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Cflags []string
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Cppflags []string
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Init_rc []string
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Required []string
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Host_required []string
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Target_required []string
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}
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// eng is true for -eng builds, and can be used to turn on additionaly heavyweight debugging
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// features.
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Eng struct {
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Cflags []string
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Cppflags []string
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Lto struct {
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Never *bool
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}
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Sanitize struct {
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Address *bool
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}
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}
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Pdk struct {
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Enabled *bool `android:"arch_variant"`
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} `android:"arch_variant"`
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Uml struct {
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Cppflags []string
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}
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Use_lmkd_stats_log struct {
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Cflags []string
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}
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Arc struct {
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Cflags []string
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Exclude_srcs []string
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Include_dirs []string
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Shared_libs []string
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Static_libs []string
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Srcs []string
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}
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Flatten_apex struct {
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Enabled *bool
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}
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Experimental_mte struct {
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Cflags []string `android:"arch_variant"`
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} `android:"arch_variant"`
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} `android:"arch_variant"`
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}
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var zeroProductVariables interface{} = variableProperties{}
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type productVariables struct {
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// Suffix to add to generated Makefiles
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Make_suffix *string `json:",omitempty"`
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BuildId *string `json:",omitempty"`
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BuildNumberFromFile *string `json:",omitempty"`
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DateFromFile *string `json:",omitempty"`
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Platform_version_name *string `json:",omitempty"`
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Platform_sdk_version *int `json:",omitempty"`
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Platform_sdk_codename *string `json:",omitempty"`
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Platform_sdk_final *bool `json:",omitempty"`
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Platform_version_active_codenames []string `json:",omitempty"`
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Platform_version_future_codenames []string `json:",omitempty"`
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Platform_vndk_version *string `json:",omitempty"`
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Platform_systemsdk_versions []string `json:",omitempty"`
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Platform_security_patch *string `json:",omitempty"`
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Platform_preview_sdk_version *string `json:",omitempty"`
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Platform_min_supported_target_sdk_version *string `json:",omitempty"`
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Platform_base_os *string `json:",omitempty"`
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DeviceName *string `json:",omitempty"`
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DeviceArch *string `json:",omitempty"`
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DeviceArchVariant *string `json:",omitempty"`
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DeviceCpuVariant *string `json:",omitempty"`
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DeviceAbi []string `json:",omitempty"`
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DeviceVndkVersion *string `json:",omitempty"`
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DeviceSystemSdkVersions []string `json:",omitempty"`
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DeviceSecondaryArch *string `json:",omitempty"`
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DeviceSecondaryArchVariant *string `json:",omitempty"`
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DeviceSecondaryCpuVariant *string `json:",omitempty"`
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DeviceSecondaryAbi []string `json:",omitempty"`
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NativeBridgeArch *string `json:",omitempty"`
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NativeBridgeArchVariant *string `json:",omitempty"`
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NativeBridgeCpuVariant *string `json:",omitempty"`
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NativeBridgeAbi []string `json:",omitempty"`
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NativeBridgeRelativePath *string `json:",omitempty"`
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NativeBridgeSecondaryArch *string `json:",omitempty"`
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NativeBridgeSecondaryArchVariant *string `json:",omitempty"`
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NativeBridgeSecondaryCpuVariant *string `json:",omitempty"`
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NativeBridgeSecondaryAbi []string `json:",omitempty"`
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NativeBridgeSecondaryRelativePath *string `json:",omitempty"`
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HostArch *string `json:",omitempty"`
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HostSecondaryArch *string `json:",omitempty"`
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CrossHost *string `json:",omitempty"`
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CrossHostArch *string `json:",omitempty"`
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CrossHostSecondaryArch *string `json:",omitempty"`
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DeviceResourceOverlays []string `json:",omitempty"`
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ProductResourceOverlays []string `json:",omitempty"`
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EnforceRROTargets []string `json:",omitempty"`
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EnforceRROExcludedOverlays []string `json:",omitempty"`
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AAPTCharacteristics *string `json:",omitempty"`
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AAPTConfig []string `json:",omitempty"`
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AAPTPreferredConfig *string `json:",omitempty"`
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AAPTPrebuiltDPI []string `json:",omitempty"`
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DefaultAppCertificate *string `json:",omitempty"`
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AppsDefaultVersionName *string `json:",omitempty"`
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Allow_missing_dependencies *bool `json:",omitempty"`
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Unbundled_build *bool `json:",omitempty"`
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Unbundled_build_sdks_from_source *bool `json:",omitempty"`
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Malloc_not_svelte *bool `json:",omitempty"`
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Safestack *bool `json:",omitempty"`
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HostStaticBinaries *bool `json:",omitempty"`
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Binder32bit *bool `json:",omitempty"`
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UseGoma *bool `json:",omitempty"`
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UseRBE *bool `json:",omitempty"`
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Debuggable *bool `json:",omitempty"`
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Eng *bool `json:",omitempty"`
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Treble_linker_namespaces *bool `json:",omitempty"`
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Enforce_vintf_manifest *bool `json:",omitempty"`
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Pdk *bool `json:",omitempty"`
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Uml *bool `json:",omitempty"`
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Use_lmkd_stats_log *bool `json:",omitempty"`
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Arc *bool `json:",omitempty"`
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MinimizeJavaDebugInfo *bool `json:",omitempty"`
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Check_elf_files *bool `json:",omitempty"`
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UncompressPrivAppDex *bool `json:",omitempty"`
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ModulesLoadedByPrivilegedModules []string `json:",omitempty"`
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BootJars []string `json:",omitempty"`
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IntegerOverflowExcludePaths []string `json:",omitempty"`
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EnableCFI *bool `json:",omitempty"`
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CFIExcludePaths []string `json:",omitempty"`
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CFIIncludePaths []string `json:",omitempty"`
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DisableScudo *bool `json:",omitempty"`
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EnableXOM *bool `json:",omitempty"`
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XOMExcludePaths []string `json:",omitempty"`
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Experimental_mte *bool `json:",omitempty"`
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VendorPath *string `json:",omitempty"`
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OdmPath *string `json:",omitempty"`
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ProductPath *string `json:",omitempty"`
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SystemExtPath *string `json:",omitempty"`
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ClangTidy *bool `json:",omitempty"`
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TidyChecks *string `json:",omitempty"`
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NativeCoverage *bool `json:",omitempty"`
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CoveragePaths []string `json:",omitempty"`
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CoverageExcludePaths []string `json:",omitempty"`
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DevicePrefer32BitApps *bool `json:",omitempty"`
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DevicePrefer32BitExecutables *bool `json:",omitempty"`
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HostPrefer32BitExecutables *bool `json:",omitempty"`
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SanitizeHost []string `json:",omitempty"`
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SanitizeDevice []string `json:",omitempty"`
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SanitizeDeviceDiag []string `json:",omitempty"`
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SanitizeDeviceArch []string `json:",omitempty"`
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ArtUseReadBarrier *bool `json:",omitempty"`
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BtConfigIncludeDir *string `json:",omitempty"`
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Override_rs_driver *string `json:",omitempty"`
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Fuchsia *bool `json:",omitempty"`
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DeviceKernelHeaders []string `json:",omitempty"`
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ExtraVndkVersions []string `json:",omitempty"`
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NamespacesToExport []string `json:",omitempty"`
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PgoAdditionalProfileDirs []string `json:",omitempty"`
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VndkUseCoreVariant *bool `json:",omitempty"`
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VndkSnapshotBuildArtifacts *bool `json:",omitempty"`
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BoardVendorSepolicyDirs []string `json:",omitempty"`
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BoardOdmSepolicyDirs []string `json:",omitempty"`
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BoardPlatPublicSepolicyDirs []string `json:",omitempty"`
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BoardPlatPrivateSepolicyDirs []string `json:",omitempty"`
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BoardSepolicyM4Defs []string `json:",omitempty"`
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BoardVndkRuntimeDisable *bool `json:",omitempty"`
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VendorVars map[string]map[string]string `json:",omitempty"`
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Ndk_abis *bool `json:",omitempty"`
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Exclude_draft_ndk_apis *bool `json:",omitempty"`
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Flatten_apex *bool `json:",omitempty"`
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DexpreoptGlobalConfig *string `json:",omitempty"`
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ManifestPackageNameOverrides []string `json:",omitempty"`
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CertificateOverrides []string `json:",omitempty"`
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PackageNameOverrides []string `json:",omitempty"`
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EnforceSystemCertificate *bool `json:",omitempty"`
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EnforceSystemCertificateWhitelist []string `json:",omitempty"`
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ProductHiddenAPIStubs []string `json:",omitempty"`
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ProductHiddenAPIStubsSystem []string `json:",omitempty"`
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ProductHiddenAPIStubsTest []string `json:",omitempty"`
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ProductPublicSepolicyDirs []string `json:",omitempty"`
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ProductPrivateSepolicyDirs []string `json:",omitempty"`
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ProductCompatibleProperty *bool `json:",omitempty"`
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TargetFSConfigGen []string `json:",omitempty"`
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MissingUsesLibraries []string `json:",omitempty"`
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}
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func boolPtr(v bool) *bool {
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return &v
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}
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func intPtr(v int) *int {
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return &v
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}
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func stringPtr(v string) *string {
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return &v
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}
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func (v *productVariables) SetDefaultConfig() {
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*v = productVariables{
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BuildNumberFromFile: stringPtr("123456789"),
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Platform_version_name: stringPtr("Q"),
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Platform_sdk_version: intPtr(28),
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Platform_sdk_codename: stringPtr("Q"),
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Platform_sdk_final: boolPtr(false),
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Platform_version_active_codenames: []string{"Q"},
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Platform_version_future_codenames: []string{"Q"},
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Platform_vndk_version: stringPtr("Q"),
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HostArch: stringPtr("x86_64"),
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HostSecondaryArch: stringPtr("x86"),
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DeviceName: stringPtr("generic_arm64"),
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DeviceArch: stringPtr("arm64"),
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DeviceArchVariant: stringPtr("armv8-a"),
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DeviceCpuVariant: stringPtr("generic"),
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DeviceAbi: []string{"arm64-v8a"},
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DeviceSecondaryArch: stringPtr("arm"),
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DeviceSecondaryArchVariant: stringPtr("armv8-a"),
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DeviceSecondaryCpuVariant: stringPtr("generic"),
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DeviceSecondaryAbi: []string{"armeabi-v7a", "armeabi"},
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AAPTConfig: []string{"normal", "large", "xlarge", "hdpi", "xhdpi", "xxhdpi"},
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AAPTPreferredConfig: stringPtr("xhdpi"),
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AAPTCharacteristics: stringPtr("nosdcard"),
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AAPTPrebuiltDPI: []string{"xhdpi", "xxhdpi"},
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Malloc_not_svelte: boolPtr(true),
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Safestack: boolPtr(false),
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}
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if runtime.GOOS == "linux" {
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v.CrossHost = stringPtr("windows")
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v.CrossHostArch = stringPtr("x86")
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v.CrossHostSecondaryArch = stringPtr("x86_64")
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}
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}
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func variableMutator(mctx BottomUpMutatorContext) {
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var module Module
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var ok bool
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if module, ok = mctx.Module().(Module); !ok {
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return
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}
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// TODO: depend on config variable, create variants, propagate variants up tree
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a := module.base()
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if a.variableProperties == nil {
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return
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}
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variableValues := reflect.ValueOf(a.variableProperties).Elem().FieldByName("Product_variables")
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zeroValues := reflect.ValueOf(zeroProductVariables).FieldByName("Product_variables")
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for i := 0; i < variableValues.NumField(); i++ {
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variableValue := variableValues.Field(i)
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zeroValue := zeroValues.Field(i)
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name := variableValues.Type().Field(i).Name
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property := "product_variables." + proptools.PropertyNameForField(name)
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// Check that the variable was set for the product
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val := reflect.ValueOf(mctx.Config().productVariables).FieldByName(name)
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if !val.IsValid() || val.Kind() != reflect.Ptr || val.IsNil() {
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continue
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}
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val = val.Elem()
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// For bools, check that the value is true
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if val.Kind() == reflect.Bool && val.Bool() == false {
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continue
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}
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// Check if any properties were set for the module
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if reflect.DeepEqual(variableValue.Interface(), zeroValue.Interface()) {
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continue
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}
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a.setVariableProperties(mctx, property, variableValue, val.Interface())
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}
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}
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func (m *ModuleBase) setVariableProperties(ctx BottomUpMutatorContext,
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prefix string, productVariablePropertyValue reflect.Value, variableValue interface{}) {
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printfIntoProperties(ctx, prefix, productVariablePropertyValue, variableValue)
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err := proptools.AppendMatchingProperties(m.generalProperties,
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productVariablePropertyValue.Addr().Interface(), nil)
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if err != nil {
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if propertyErr, ok := err.(*proptools.ExtendPropertyError); ok {
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ctx.PropertyErrorf(propertyErr.Property, "%s", propertyErr.Err.Error())
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} else {
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panic(err)
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}
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}
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}
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func printfIntoPropertiesError(ctx BottomUpMutatorContext, prefix string,
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productVariablePropertyValue reflect.Value, i int, err error) {
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field := productVariablePropertyValue.Type().Field(i).Name
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property := prefix + "." + proptools.PropertyNameForField(field)
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ctx.PropertyErrorf(property, "%s", err)
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}
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func printfIntoProperties(ctx BottomUpMutatorContext, prefix string,
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productVariablePropertyValue reflect.Value, variableValue interface{}) {
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for i := 0; i < productVariablePropertyValue.NumField(); i++ {
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propertyValue := productVariablePropertyValue.Field(i)
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kind := propertyValue.Kind()
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if kind == reflect.Ptr {
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if propertyValue.IsNil() {
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continue
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}
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propertyValue = propertyValue.Elem()
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}
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switch propertyValue.Kind() {
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case reflect.String:
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err := printfIntoProperty(propertyValue, variableValue)
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if err != nil {
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printfIntoPropertiesError(ctx, prefix, productVariablePropertyValue, i, err)
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}
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case reflect.Slice:
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for j := 0; j < propertyValue.Len(); j++ {
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err := printfIntoProperty(propertyValue.Index(j), variableValue)
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if err != nil {
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printfIntoPropertiesError(ctx, prefix, productVariablePropertyValue, i, err)
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}
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}
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case reflect.Bool:
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// Nothing
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case reflect.Struct:
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printfIntoProperties(ctx, prefix, propertyValue, variableValue)
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default:
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panic(fmt.Errorf("unsupported field kind %q", propertyValue.Kind()))
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}
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}
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}
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func printfIntoProperty(propertyValue reflect.Value, variableValue interface{}) error {
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s := propertyValue.String()
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count := strings.Count(s, "%")
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if count == 0 {
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return nil
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}
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if count > 1 {
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return fmt.Errorf("product variable properties only support a single '%%'")
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}
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if strings.Contains(s, "%d") {
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switch v := variableValue.(type) {
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case int:
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// Nothing
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case bool:
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if v {
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variableValue = 1
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} else {
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variableValue = 0
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}
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default:
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return fmt.Errorf("unsupported type %T for %%d", variableValue)
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}
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} else if strings.Contains(s, "%s") {
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switch variableValue.(type) {
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case string:
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// Nothing
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default:
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return fmt.Errorf("unsupported type %T for %%s", variableValue)
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}
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} else {
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return fmt.Errorf("unsupported %% in product variable property")
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}
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propertyValue.Set(reflect.ValueOf(fmt.Sprintf(s, variableValue)))
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return nil
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}
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var variablePropTypeMap OncePer
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// sliceToTypeArray takes a slice of property structs and returns a reflection created array containing the
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// reflect.Types of each property struct. The result can be used as a key in a map.
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func sliceToTypeArray(s []interface{}) interface{} {
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// Create an array using reflection whose length is the length of the input slice
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ret := reflect.New(reflect.ArrayOf(len(s), reflect.TypeOf(reflect.TypeOf(0)))).Elem()
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for i, e := range s {
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ret.Index(i).Set(reflect.ValueOf(reflect.TypeOf(e)))
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}
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return ret.Interface()
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}
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// createVariableProperties takes the list of property structs for a module and returns a property struct that
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// contains the product variable properties that exist in the property structs, or nil if there are none. It
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// caches the result.
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func createVariableProperties(moduleTypeProps []interface{}, productVariables interface{}) interface{} {
|
|
// Convert the moduleTypeProps to an array of reflect.Types that can be used as a key in the OncePer.
|
|
key := sliceToTypeArray(moduleTypeProps)
|
|
|
|
// Use the variablePropTypeMap OncePer to cache the result for each set of property struct types.
|
|
typ, _ := variablePropTypeMap.Once(NewCustomOnceKey(key), func() interface{} {
|
|
// Compute the filtered property struct type.
|
|
return createVariablePropertiesType(moduleTypeProps, productVariables)
|
|
}).(reflect.Type)
|
|
|
|
if typ == nil {
|
|
return nil
|
|
}
|
|
|
|
// Create a new pointer to a filtered property struct.
|
|
return reflect.New(typ).Interface()
|
|
}
|
|
|
|
// createVariablePropertiesType creates a new type that contains only the product variable properties that exist in
|
|
// a list of property structs.
|
|
func createVariablePropertiesType(moduleTypeProps []interface{}, productVariables interface{}) reflect.Type {
|
|
typ, _ := proptools.FilterPropertyStruct(reflect.TypeOf(productVariables),
|
|
func(field reflect.StructField, prefix string) (bool, reflect.StructField) {
|
|
// Filter function, returns true if the field should be in the resulting struct
|
|
if prefix == "" {
|
|
// Keep the top level Product_variables field
|
|
return true, field
|
|
}
|
|
_, rest := splitPrefix(prefix)
|
|
if rest == "" {
|
|
// Keep the 2nd level field (i.e. Product_variables.Eng)
|
|
return true, field
|
|
}
|
|
|
|
// Strip off the first 2 levels of the prefix
|
|
_, prefix = splitPrefix(rest)
|
|
|
|
for _, p := range moduleTypeProps {
|
|
if fieldExistsByNameRecursive(reflect.TypeOf(p).Elem(), prefix, field.Name) {
|
|
// Keep any fields that exist in one of the property structs
|
|
return true, field
|
|
}
|
|
}
|
|
|
|
return false, field
|
|
})
|
|
return typ
|
|
}
|
|
|
|
func splitPrefix(prefix string) (first, rest string) {
|
|
index := strings.IndexByte(prefix, '.')
|
|
if index == -1 {
|
|
return prefix, ""
|
|
}
|
|
return prefix[:index], prefix[index+1:]
|
|
}
|
|
|
|
func fieldExistsByNameRecursive(t reflect.Type, prefix, name string) bool {
|
|
if t.Kind() != reflect.Struct {
|
|
panic(fmt.Errorf("fieldExistsByNameRecursive can only be called on a reflect.Struct"))
|
|
}
|
|
|
|
if prefix != "" {
|
|
split := strings.SplitN(prefix, ".", 2)
|
|
firstPrefix := split[0]
|
|
rest := ""
|
|
if len(split) > 1 {
|
|
rest = split[1]
|
|
}
|
|
f, exists := t.FieldByName(firstPrefix)
|
|
if !exists {
|
|
return false
|
|
}
|
|
ft := f.Type
|
|
if ft.Kind() == reflect.Ptr {
|
|
ft = ft.Elem()
|
|
}
|
|
if ft.Kind() != reflect.Struct {
|
|
panic(fmt.Errorf("field %q in %q is not a struct", firstPrefix, t))
|
|
}
|
|
return fieldExistsByNameRecursive(ft, rest, name)
|
|
} else {
|
|
_, exists := t.FieldByName(name)
|
|
return exists
|
|
}
|
|
}
|