diff options
authorSteven Moreland2017-04-14 01:27:20 -0500
committerSteven Moreland2017-04-14 01:28:39 -0500
commitd0b26edf309cc090569dae65aa3ab6bf8361b020 (patch)
tree3bef8aa1d5fd939f2c301d5f4376ec376e3c568b /libsync
parent5975d4e33724047d73883ca84fda8b360f2fe000 (diff)
libsync: vendor_available
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: None of this is enabled unless the device opts into the system/vendor split with BOARD_VNDK_VERSION := current. Bug: 33241851 Test: build and flash internal marlin Test: m -j libsync Test: build with BOARD_VNDK_VERSION := current Change-Id: I5b23d2c1f41b842e5a9b7ea257921133b80c3f98
Diffstat (limited to 'libsync')
1 files changed, 1 insertions, 0 deletions
diff --git a/libsync/Android.bp b/libsync/Android.bp
index e7dcf36d6..257d42deb 100644
--- a/libsync/Android.bp
+++ b/libsync/Android.bp
@@ -22,6 +22,7 @@ cc_defaults {
22 22
23cc_library_shared { 23cc_library_shared {
24 name: "libsync", 24 name: "libsync",
25 vendor_available: true,
25 defaults: ["libsync_defaults"], 26 defaults: ["libsync_defaults"],
26} 27}
27 28