tree d7344801acb081298621824f36ef7ce1140c31b8
parent 4ac1829d7ebb03d63f9ca1c1ddcdf45443e84f33
author Martin Stjernholm <mast@google.com> 1550887814 +0000
committer Martin Stjernholm <mast@google.com> 1550893587 +0000

Avoid runtime namespace becoming parent for classloader-namespace.

Passing nullptr as parent namespace to android_create_namespace makes it use
the namespace of the caller as parent, which typically is the runtime
namespace. That in turn causes classloader-namespace to inherit any
libraries in the shared group of the runtime namespace, i.e. any libraries
that have been loaded in it with RTLD_GLOBAL or DF_1_GLOBAL up to that
point.

Let's instead pass the platform namespace from the linker config as fallback
when a parent namespace cannot be found. That is also what happened before
libnativeloader moved into the runtime namespace.

Test: Flash and boot
Test: atest CtsJniTestCases (on cuttlefish and taimen)
Bug: 124501296
Change-Id: If2faee74e2bdcf95d19516faec340fedcdd07e29