How it works:
1. build/make/core/Makefile generates a txt file with the kernel
version, which is taken from an explicit BOARD_KERNEL_VERSION value,
or extracted from the kernel image on the source tree, or extracted
from the kernel image extracted from the prebuilt boot.img.
The file is saved at
$ANDROID_PRODUCT_OUT/obj/PACKAGING/check_vintf_all_intermediates/kernel_version.txt.
2. If PRODUCT_ENABLE_UFFD_GC is "default", meaning the GC type needs to
be determined by the kernel version, build/make/core/Makefile copies
kernel_version.txt to
out/soong/dexpreopt/kernel_version_for_uffd_gc.txt.
3. build/soong/dexpreopt/config.go writes the the UFFD GC flag to
out/soong/dexpreopt/uffd_gc_flag.txt. The flag is determined by an
explicit PRODUCT_ENABLE_UFFD_GC value or by contruct_uffd_gc_flag.py,
which reads kernel_version_for_uffd_gc.txt and determines the flag
accordingly.
4. dex2oat takes the UFFD GC flag from uffd_gc_flag.txt.
5. post_process_props.py mangles ro.dalvik.vm.enable_uffd_gc based on
the same logic.
Bug: 321751629
Bug: 319554951
Bug: 318763448
Bug: 319648491
Test: m --no-skip-soong-tests nothing
Test: atest uffd_gc_utils_test
Test: Build with `OVERRIDE_ENABLE_UFFD_GC=default m` for device with no
UFFD support -
1. Check the existence of `-Xgc:CMC` in
out/soong/dexpreopt_arm64/dex_bootjars/android/system/framework/arm64/boot.invocation
(dex2oat invocation for a boot image)
2. Check the existence of `-Xgc:CMC` in
out/soong/.intermediates/packages/apps/Settings/Settings/android_common/dexpreopt/Settings/oat/arm64/package.invocation
(dex2oat invocation for an app defined in .bp)
3. Check the existence of `-Xgc:CMC` in
$ANDROID_PRODUCT_OUT/obj/APPS/Dialer_intermediates/oat/arm64/package.invocation
(dex2oat invocation for an app defined in .mk)
4. Check the value of ro.dalvik.vm.enable_uffd_gc in
$ANDROID_PRODUCT_OUT/product/etc/build.prop
Test: Build with `OVERRIDE_ENABLE_UFFD_GC=default m` for device with
UFFD support, and do the steps above.
Test: Build with `OVERRIDE_ENABLE_UFFD_GC=true m`, and do the steps
above.
Test: Build with `OVERRIDE_ENABLE_UFFD_GC=false m`, and do the steps
above.
Change-Id: I035ad32233e49e2a30ce11f6c7c318a648511ef8
Every module belonging to a single mainline module family will be
hidden from make, except the one which has been flagged using
apex_contributions
Details
- Introduce a new `source_apex_name` property to prebuilt_apex and
override_apex. This property will be used to identify the source
equivalent of a prebuilt soong apex module.
- Create an N-ary tree from source to prebuilt(s). The tree wil be
rooted at the source module.
- In a subsequent mutator, visit every node in the tree(s). Query
apex_contributions and store the handle of the node which is "active"
(if any)
- In the same mutator, do another pass over the tree. Invoke
`HideFromMake` on every node which is not "active". The two-pass
approach is needed PrebuiltSelectionInfoProvider does not know about
the inter source-prebuilt dependency, this dependency can only be
known by doing a graph walk of the N-ary tree.
Some tangential implementation details
- Each prebuilt apex has an internal deapxer module that is responsible
for generating the deapex ninja rules. The name of this internal
module uses the BaseModuleName (without the prebuilt_ prefix). Since
we can have multiple prebuilt soong modules in trunk stable, change
this to follow the name of the prebuilt module in order to avoid name
collisions. Update existing unit tests accordingly
Bug: 316179314
Test: go test ./apex -run TestInstallationRulesForMultipleApexPrebuilts
Test: m nothing --no-skip-soong-tests
Test: presubmits
Change-Id: I58aa99d5e6a9859954614e6db9a8e9e2e581642d
hiddenapi and dexpreopt require boot and system server jars from apexes.
When building with prebuilts, this comes via
java_import/java_sdk_library_import, which acts as a hook for
prebuilt_apex/apex_set. If we have multiple apexes in the tree, this
hook becomes 1:many. This CL prepares dex_bootjars to select the right
deapexerd .jar files when mutliple prebuilts exist.
Implementation details
- Update prebuilt module types (prebuilt_apex/apex_set) and source
apexes to set a map of
library name to dex jar path on host.
- dex_bootjars will access the path of the .dex jar on host via the
provider. These then
copied/installed to the right locations.
This CL does not drop the old mechanism to get the dex file (i.e. by
creating a dep on java_library). Once all mainline
modules have been flagged using apex_contributions, the old mechanism
will be dropped
Bug: 308790457
Test: git_master-art-host:art-gtest https://android-build.corp.google.com/builds/abtd/run/L21500030000926533
Test: git_main:art_standalone_dexpreopt_tests https://android-build.corp.google.com/builds/abtd/run/L99000030000891212
Test: Added a unit test that checks that the right .jar is selected
when multiple prebuilts exists
Change-Id: I6ef94135b9303a35135810930af4b641df13a583
Generating boot image requires a .prof file provided by the ART apex.
When building with prebuilts, this comes via the
prebuilt_bootclasspath_fragment module, which acts as a shim for
prebuilt_apex/apex_set. If we have multiple prebuilt apexes in the tree,
this shim becomes 1:many. This CL prepares dex_bootjars to select the
right .prof file when multiple prebuilts exist.
Implementation details
- Update deps mutator of dex_bootjars to create a dep on
all_apex_contributions. The latter contains information about which
apex is selected in a specific release configuration. dex_bootjars
will create a dependency on the selected apex in a postdeps phase
mutator.
- All apex module types (apex, prebuilt_apex and apex_set) will set a
provider that contains info about the location of the .prof file on
host
- dex_bootjars will access the provider of the selected apex to get the
location of the .prof file
This CL does not drop the old mechanism to get the .prof file (i.e. by
creating a dep on {prebuilt_}bootclasspath_fragment). Once all mainline
modules have been flagged using apex_contributions, the old mechanism
will be dropped
Bug: 308790457
Test: Added a unit test that checks that the right .prof is selected
when multiple prebuilts exists
Change-Id: I40fdb21416c46bed32f6ff187ce5153711ec2c69
In the past, dexpreopt for boot jars was very inflexible, and it was
incredibly hard to make a change that is as simple as adding a jar to a
boot image. Boot image generation was handled by
"platform_bootclasspath" and "bootclasspath_fragment" separately. This
caused not only code duplication but also the inflexiblity as such a
design did not fit today's use cases, where a boot image may take jars
from multiple mainline modules and the platform, and a mainline module
can contribute to multiple boot images. The design casued a huge
maintenance burden as any change to the boot image cost multi-week
efforts.
In recent years, efforts have been made to improve this a bit by a bit.
This change is another step towards making dexpreopt reasonable.
After this change, all boot images are generated by "dex_bootjars",
which is in build/soong and is therefore available on both the full
source tree and the thin manifest (master-art). The change decouples
profile generation/extraction from boot image generation. Profiles for
mainline modules are still handled by "bootclasspath_fragment"
because they need to be packed into APEXes when building mainline
modules and extracted from APEXes whem building the system image from
prebuilt modules. Boot images are not handled by
"bootclasspath_fragment" anymore.
Bug: 290583827
Test: m (all existing tests are still passing)
Test: Manually checked that the boot images are exactly the same as
before.
Change-Id: Ib5a5f401bee334ffcab5c26618e0c8888b84575a
This is to decouple profile generation from image configs. A boot image
profile is either for a mainline module or for the platform, which is
orthogonal to boot images.
Bug: 290583827
Test: m nothing
Change-Id: I0918f2fa945a2af1839f1a08ecede331c64d0317
This CL is to prepare for the changes in http://r.android.com/2652081.
See the description of that CL for the reasons.
Some tests were set up in a fragile way and were easy to be broken when
the implementation changes. This CL is a pure test change that fixes
them.
This CL also removes TestNoUpdatableJarsInBootImage. That test checks
what should go to the ART boot image and what should go to the
platform one, which does not apply today because boot images are not
associated with mainline modules anymore: a boot image may take jars
from multiple mainline modules and the platform, and a mainline module
can contribute to multiple boot images. In practice, we have ART jars in
the platform boot image, and we are going to add core-icu4j and
consrypt to the ART boot image, which is now for testing only.
Bug: 290583827
Test: m nothing
Change-Id: I22c45cbf6f853b030b68edb51197854e9c53a02e
After this change, there is a clear separation between tests that are
related to dexpreopt and tests that are not. The former uses
PrepareForTestWithDexpreopt, while the latter uses
PrepareForTestWithJavaDefaultModules. The benefit is that the latter
will no longer affected by any dexpreopt changes.
Bug: 280776428
Test: m nothing
Change-Id: Ib957765b9287d51c082e0a33cee17a6bb56daeef
2023-05-11 18:24:44 +01:00
Renamed from java/dexpreopt_bootjars_test.go (Browse further)
