Add runtime option -Xbootclasspathfds: for pre-opened fds
The new option allows the client to pass a pre-opened fds to the
runtime. The number of elements must match the number of BCP jars
specified in -Xbootclasspath. An fd of negative number is a valid
option, in such case the runtime will still open the jar in the
corresponding path in -Xbootclasspath.
Example: -Xbootclasspathfds:10:11:-1:12
The option is currently only used in "unstarted runtime", but will also
be used elsewhere in the follow-up changes.
Bug: 187327262
Test: patch odrefresh to use the option, no longer seeing such openat(2)
Test: m test-art-host-gtest
Change-Id: I1bebbd80136419c03ac1309a8cb8229a0fd69838
14 files changed
