Support any number of overlay packages. Support any target package.
UPDATED PACKAGE MATCHING
------------------------
In Runtime resource overlay, iteration 1, only a single overlay package
was considered. Package matching was based on file paths:
/vendor/overlay/system/framework-res.apk corresponded to
/system/framework-res.apk. Introduce a more flexible matching scheme
where any package is an overlay package if its manifest includes
<overlay targetPackage="com.target.package"/>
For security reasons, an overlay package must fulfill certain criteria
to take effect: see below.
THE IDMAP TOOL AND IDMAP FILES
------------------------------
Idmap files are created by the 'idmap' binary; idmap files must be
present when loading packages. For the Android system, Zygote calls
'idmap' as part of the resource pre-loading. For application packages,
'idmap' is invoked via 'installd' during package installation (similar
to 'dexopt').
UPDATED FLOW
------------
The following is an outline of the start-up sequences for the Android
system and Android apps. Steps marked with '+' are introduced by this
commit.
Zygote initialization
Initial AssetManager object created
+ idmap --scan creates idmaps for overlays targeting 'android', \
stores list of overlays in /data/resource-cache/overlays.list
AssetManager caches framework-res.apk
+ AssetManager caches overlay packages listed in overlays.list
Android boot
New AssetManager's ResTable acquired
AssetManager re-uses cached framework-res.apk
+ AssetManager re-uses cached 'android' overlays (if any)
App boot
ActivityThread prepares AssetManager to load app.apk
+ ActivityThread prepares AssetManager to load app overlays (if any)
New AssetManager's ResTable acquired as per Android boot
SECURITY
--------
Overlay packages are required to be pre-loaded (in /vendor/overlay).
These packages are trusted by definition. A future iteration of runtime
resource overlay may add support for downloaded overlays, which would
likely require target and overlay signatures match for the overlay to
be trusted.
LOOKUP PRIORITY
---------------
During resource lookup, packages are sequentially queried to provide a
best match, given the constraints of the current configuration. If any
package provide a better match than what has been found so far, it
replaces the previous match. The target package is always queried last.
When loading a package with more than one overlay, the order in which
the overlays are added become significant if several packages overlay
the same resource.
Had downloaded overlays been supported, the install time could have been
used to determine the load order. Regardless, for pre-installed
overlays, the install time is randomly determined by the order in which
the Package Manager locates the packages during initial boot. To support
a well-defined order, pre-installed overlay packages are expected to
define an additional 'priority' attribute in their <overlay> tags:
<overlay targetPackage="com.target.package" priority="1234"/>
Pre-installed overlays are loaded in order of their priority attributes,
sorted in ascending order.
Assigning the same priority to several overlays targeting the same base
package leads to undefined behaviour. It is the responsibility of the
vendor to avoid this.
The following example shows the ResTable and PackageGroups after loading
an application and two overlays. The resource lookup framework will
query the packages in the order C, B, A.
+------+------+- -+------+------+
| 0x01 | | ... | | 0x7f |
+------+------+- -+------+------+
| |
"android" Target package A
|
Pre-installed overlay B (priority 1)
|
Pre-installed overlay C (priority 2)
Change-Id: If49c963149369b1957f7d2303b3dd27f669ed24e
Null values were being written out as <null /> elements in the
XML prefs file (as expected). This allowed the getFoo() functions
to work correctly because they treated null values as missing mappings
but containsKey would fail.
bug: https://code.google.com/p/android/issues/detail?id=64563
Change-Id: I1f466d01db96bf26e208d4fed3a6f257228bea5d
For storing pointers, long is used, as
native pointers can be 64-bit.
In addition, some minor changes have been done
to conform with standard JNI practice (e.g. use
of jint instead of int in JNI function prototypes)
Change-Id: I7aee49dc26cf6c86af8f1d882e9cd1cc145a1977
Signed-off-by: Ashok Bhat <ashok.bhat@arm.com>
Signed-off-by: Marcus Oakland <marcus.oakland@arm.com>
Signed-off-by: Kévin PETIT <kevin.petit@arm.com>
We now update Dalvik's process state through VMRuntime when the
process state changes in ActivityThread. This is used to determine
when to do trimming and will be used to determine when to do
compaction in the near future.
Bug: 8981901
Change-Id: I5eea272ba4ec2d1ed789b058d6457cb3c1fcf777
The init & clear operations are particularly important to ensure
delivery when at all possible, so we retry those periodically
if the transport is unavailable when we first attempt them.
Now with 100% less build break.
Bug 11716868
Change-Id: I2af4e93788068cfac97c0a48d3568c561eefa23d
The init & clear operations are particularly important to ensure
delivery when at all possible, so we retry those periodically
if the transport is unavailable when we first attempt them.
Bug 11716868
Change-Id: I4860fe3d4e99618b2cd194c83162bd7cbd5a83a9
Port the new style UI back into the framework from the support library.
There are now two dialogs: a chooser and a controller. We use the
same dialogs for selecting routes within app and within quick settings.
Note that the new UI does not support any grouping features since they
are deprecated and unused.
Bug: 11257292
Change-Id: I64e936a18d25ab75f0c470cbc1e7085f67004863
This change adds a new media router service whose purpose is to track
global state information associated with media routes. This service
publishes routes to the media router instance in application processes
and handles requested state changes such as selecting or unselecting
global routes. The service also binds to remote display provider
services which can offer new remote display routes to the system.
Includes a test application for manually verifying certain aspects
of the operation of the media router service.
The remote display provider interface is essentially a stripped down
media route provider interface as defined in the support library
media router implementation. For now, it is designed to be used only
by first parties to publish remote display routes to the system so
it is not exposed as public API in the SDK. In the future, the remote
display provider interface will most likely be deprecated and replaced
with a more featureful media route provider interface for third
party integration, similar to what is in the support library today.
Further patch sets integrate these new capabilities into the System UI
and Settings for connecting remote displays.
Bug: 11257292
Change-Id: I31109f23f17b474d17534d0f5f4503e388b081c2
