At the moment this isn't actually async because we immediately require
the pid and block on launch anyway. It also crashes the entire browser
on otherwise recoverable launch errors, because code that wants the pid
isn't set up to handle that operation failing.
MozReview-Commit-ID: 5favGu34QCv
--HG--
extra : rebase_source : 3c81c53e1eb8ead353ef3477ed3ceea0f5edcbbe
This replaces some old Chromium code that tries to minimally disentangle
an arbitrary file descriptor mapping with simpler algorithm, for several
reasons:
1. Do something appropriate when a file descriptor is mapped to the same
fd number in the child; currently they're ignored, which means they'll
be closed if they were close-on-exec. This implementation duplicates
the fd twice in that case, which seems to be uncommon in practice; this
isn't maximally efficient but avoids special-case code.
2. Make this more generally applicable; the previous design is
specialized for arbitrary code running between fork and exec, but we
also want to use this on OS X with posix_spawn, which exposes a very
limited set of operations.
3. Avoid the use of C++ standard library iterators in async signal safe
code; the Chromium developers mention that this is a potential problem in
some debugging implementations that take locks.
4. In general the algorithm is simpler and should be more "obviously
correct"; more concretely, it should get complete coverage just by being
run normally in a debug build.
As a convenient side benefit, CloseSuperfluousFds now takes an arbitrary
predicate for which fds to leave open, which means it can be used in
other code that needs it without creating a fake fd mapping.
MozReview-Commit-ID: EoiRttrbrKL
--HG--
extra : rebase_source : 336e0ba9f56dc80f7347dc62617b4ad1efea7e7e
One file was excluded for using plarena which it did not. The other was
excluded for "clashes with strdup," it does not use strdup.
MozReview-Commit-ID: 5X5H9S4j903
One file was excluded for using plarena which it did not. The other was
excluded for "clashes with strdup," it does not use strdup.
MozReview-Commit-ID: 5X5H9S4j903
This removes the unnecessary setting of c-basic-offset from all
python-mode files.
This was automatically generated using
perl -pi -e 's/; *c-basic-offset: *[0-9]+//'
... on the affected files.
The bulk of these files are moz.build files but there a few others as
well.
MozReview-Commit-ID: 2pPf3DEiZqx
--HG--
extra : rebase_source : 0a7dcac80b924174a2c429b093791148ea6ac204
The first check in ByteLengthIsValid() says "nsTArray only handles
sizes up to INT32_MAX", but the actual requirement is that the
capacity is no larger than UINT32_MAX. The check is overly restrictive
if sizeof(E) is 1 byte, and overly permissive if sizeof(E) is greater
than 2 bytes. I removed this check. Internal nsTArray invariants
should be enforced by nsTArray methods.
The second check is trying to check for overflow, but that should just
be done using CheckedInt.
There are a long tail of C4311 and C4312 warnings in VS2015. Rather than
wait until all of them are fixed to land VS2015, we're taking the easy
way out and disabling these warnings in every directory currently
exhibiting a warning. This is evil. But it is a lesser evil than
globally disabling C4311 and C4312. At least with this approach new
C4311 and C4312 warnings in directories that aren't suppressing them
shouldn't be introduced.
MozReview-Commit-ID: 2cwWrjMD6B9
--HG--
extra : rebase_source : 3e7b8ea042765fdf138f5ca93a0f9dab75a95fcd
Landing as one rolled-up patch to avoid breaking regression tests, and in
keeping with previous WebRTC imports. Broken out parts that needed review
are on the bug.
