tree 0e35795b7b52bc65af89143af0662b5b0f4ce3e1
parent 73ee7a6320024c8f390d954a01b7a067c919bfc4
author Torne (Richard Coles) <torne@google.com> 1539806378 -0400
committer Torne (Richard Coles) <torne@google.com> 1550701776 -0500

linker: allow using reserved space for multiple libraries.

Introduce a new flag ANDROID_DLEXT_RESERVED_ADDRESS_RECURSIVE which
instructs the linker to use the reserved address space to load all of
the newly-loaded libraries required by a dlopen() call instead of only
the main library. They will be loaded consecutively into that region if
they fit. The RELRO sections of all the loaded libraries will also be
considered for reading/writing shared RELRO data.

This will allow the WebView implementation to potentially consist of
more than one .so file while still benefiting from the RELRO sharing
optimisation, which would otherwise only apply to the "root" .so file.

Test: bionic-unit-tests (existing and newly added)
Bug: 110790153
Change-Id: I61da775c29fd5017d9a1e2b6b3757c3d20a355b3