gecko-dev/ipc/gtest
Jed Davis f9c2aefe5c Bug 1550900 - Support "frozen" shared memory where the parent process retains write access. r=froydnj
This patch extends shared memory freezing to support the use case where
the parent process retains write access for incremental updates, while
other processes receive read-only access.

Note that, while some OSes allow independent read-only and read/write
capabilities for the same object, all we have on Android is an operation
that prevents future write mappings.  Therefore, this allows an existing
writeable mapping to be retained, but if that is unmapped then even the
parent process can't re-create it.

As with freezing, the read-only restriction may not be enforceable if
the recipient process isn't adequately sandboxed (e.g., on Linux, if it
can use /proc/self/fd to reopen the inode for writing).

Differential Revision: https://phabricator.services.mozilla.com/D67187

--HG--
extra : moz-landing-system : lando
2020-03-20 16:23:59 +00:00
..
moz.build
TestSharedMemory.cpp Bug 1550900 - Support "frozen" shared memory where the parent process retains write access. r=froydnj 2020-03-20 16:23:59 +00:00