No description
385fe692cc
By setting vendor_available, the following may become true:
* a prebuilt library from this release may be used at runtime by
in a later releasse (by vendor code compiled against this release).
so this library shouldn't depend on runtime state that may change
in the future.
* this library may be loaded twice into a single process (potentially
an old version and a newer version). The symbols will be isolated
using linker namespaces, but this may break assumptions about 1
library in 1 process (your singletons will run twice).
Background:
This means that these modules may be built and installed twice --
once for the system partition and once for the vendor partition. The
system version will build just like today, and will be used by the
framework components on /system. The vendor version will build
against a reduced set of exports and libraries -- similar to, but
separate from, the NDK. This means that all your dependencies must
also mark vendor_available.
At runtime, /system binaries will load libraries from /system/lib*,
while /vendor binaries will load libraries from /vendor/lib*. There
are some exceptions in both directions -- bionic(libc,etc) and liblog
are always loaded from /system. And SP-HALs (OpenGL, etc) may load
/vendor code into /system processes, but the dependencies of those
libraries will load from /vendor until it reaches a library that's
always on /system. In the SP-HAL case, if both framework and vendor
libraries depend on a library of the same name, both versions will be
loaded, but they will be isolated from each other.
It's possible to compile differently -- reducing your source files,
exporting different include directories, etc. For details see:
https://android-review.googlesource.com/368372
None of this is enabled unless the device opts into the system/vendor
split with BOARD_VNDK_VERSION := current.
Bug: 36426473
Bug: 36079834
Test: m -j libcutils
Test: attempt to compile with BOARD_VNDK_VERSION := current
Test: (sanity) boot internal marlin
(cherry picked from commit
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|---|---|---|
| adb | ||
| adf | ||
| base | ||
| bootstat | ||
| cpio | ||
| debuggerd | ||
| demangle | ||
| fastboot | ||
| fingerprintd | ||
| fs_mgr | ||
| gatekeeperd | ||
| healthd | ||
| include | ||
| init | ||
| libappfuse | ||
| libbacktrace | ||
| libbinderwrapper | ||
| libcrypto_utils | ||
| libcutils | ||
| libdiskconfig | ||
| libion | ||
| liblog | ||
| libmemtrack | ||
| libmemunreachable | ||
| libmetricslogger | ||
| libnativebridge | ||
| libnativeloader | ||
| libnetutils | ||
| libpackagelistparser | ||
| libpixelflinger | ||
| libprocessgroup | ||
| libprocinfo | ||
| libsparse | ||
| libsuspend | ||
| libsync | ||
| libsystem | ||
| libsysutils | ||
| libunwindstack | ||
| libusbhost | ||
| libutils | ||
| libziparchive | ||
| lmkd | ||
| logcat | ||
| logd | ||
| logwrapper | ||
| mkbootimg | ||
| reboot | ||
| rootdir | ||
| run-as | ||
| sdcard | ||
| shell_and_utilities | ||
| toolbox | ||
| trusty | ||
| tzdatacheck | ||
| .clang-format | ||
| .clang-format-2 | ||
| .clang-format-4 | ||
| .gitignore | ||
| Android.bp | ||
| Android.mk | ||
| CleanSpec.mk | ||
| MODULE_LICENSE_APACHE2 | ||
| NOTICE | ||
| PREUPLOAD.cfg | ||