tag | e79ce1f69d8525b75c791ba7d4e12410b18425c3 | |
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tagger | The Android Open Source Project <initial-contribution@android.com> | Wed Dec 06 15:20:26 2023 -0800 |
object | 1b357924d488c38b0afccd17a8d4f948c17a417c |
Android VTS 12.0 Release 10 (11170542)
commit | 1b357924d488c38b0afccd17a8d4f948c17a417c | [log] [tgz] |
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author | Android Build Coastguard Worker <android-build-coastguard-worker@google.com> | Thu Sep 21 20:15:10 2023 +0000 |
committer | Android Build Coastguard Worker <android-build-coastguard-worker@google.com> | Thu Sep 21 20:15:10 2023 +0000 |
tree | e5244372544d1df74108ee6fb6ac3c873d81e8ab | |
parent | bbeac35929483c8119cdd092abd2b967f01a7770 [diff] | |
parent | 8680b76360e5f64bb8d21044261e6b7a296cbe99 [diff] |
Snap for 10841429 from 8680b76360e5f64bb8d21044261e6b7a296cbe99 to android12-tests-release Change-Id: I64a384df3ab526dae10aa9a937196fbcaf560289
SdkExtensions module is responsible for:
The module is packaged in an apex, com.android.sdkext
, and has several components:
bin/derive_classpath
: a native binary that runs early in the device boot process. It reads individual classpath configs files from the system and other modules, merges them, and defines the definition of *CLASSPATH environ variables.bin/derive_sdk
: native binary that runs early in the device boot process and reads metadata of other modules, to set system properties relating to the extension SDK (for instance build.version.extensions.r
).javalib/framework-sdkextension.jar
: this is a jar on the bootclasspath that exposes APIs to applications to query the extension SDK level.derive_sdk
is a program that reads metadata stored in other apex modules, in the form of binary protobuf files in subpath etc/sdkinfo.pb
inside each apex. The structure of this protobuf can be seen here. The exact steps for converting a set of metadata files to actual extension versions is likely to change over time, and should not be depended upon.
The module exposes a java class SdkExtensions
in the package android.os.ext
. The method getExtensionVersion(int)
can be used to read the version of a particular sdk extension, e.g. getExtensionVersion(Build.VERSION_CODES.R)
.
derive_classpath
service reads and merges individual config files in the /system/etc/classpaths/
and /apex/*/etc/classpaths
. Each config stores protobuf message from classpaths.proto
in a proto binary format. Exact merging algorithm that determines the order of the classpath entries is described in derive_classpath.cpp
and may change over time.
For every new Android SDK level a new extension version should be defined. These are the steps necessary to do that:
derive_sdk.cpp
by:GetSdkLevel
with the new enum setderive_sdk_test.cpp
verifying the new extensions worksSdkExtensions.getExtensionVersion
API support the new extensions.RollbackManagerServiceImpl#getExtensionVersions
to account for the new extension version.