This adds a pipe going in the other direction (parent to child).
Initially, I didn’t think this was necessary, but it turned out to be
needed for ProcessReader. Having the child wait on a pipe read is the
easiest way to keep it alive until the parent is done with it.
This also tests MachMultiprocess::ChildPID() in
mach_multiprocess_test.cc.
Both of these fell out of https://codereview.chromium.org/491963002/.
TEST=util_test MachMultiprocess.MachMultiprocess
R=rsesek@chromium.org
Review URL: https://codereview.chromium.org/491363002
InRangeCast<> is similar to base::saturated_cast<>, but it allows the
caller to specify the value to be returned in the event that the source
value can’t be converted to the destination data type without data loss.
TEST=util_test InRangeCast
R=rsesek@chromium.org
Review URL: https://codereview.chromium.org/467103002
This also adds MachErrorMessage(), a test-only function that’s a
dependency of TaskMemory’s test, and related test-only error message
functions.
TEST=util_test TaskMemory.*
R=rsesek@chromium.org
Review URL: https://codereview.chromium.org/438993002
The final range check needs to check that the value fits in a size_t,
because that’s what StringFileWriter uses for its offset_.
TEST=util_test StringFileWriter.SeekInvalid
R=rsesek@chromium.org
Review URL: https://codereview.chromium.org/434103003
