tree fcf31ea564ed7d44f25f72631bb4c1a7d5abab50
parent 4fc500aa1596a40bd080e1c5aaeea6c1da1b0e51
author Mark Mentovai <mark@chromium.org> 1587484784 -0400
committer Copybara-Service <copybara-worker@google.com> 1611067922 -0800

ios: Build util/mach/exc_server_variants.cc, support code, and tests

This makes UniversalMachExcServer available on iOS.
UniversalMachExcServer is the foundation for a Mach exc and mach_exc
server.

Some code in UniversalMachExcServer needs to be evaluated to ensure that
portions that run in the same process that has sustained the exception
are safe to do so at that time. For example,
SimplifiedExcServer<ExcTraits>::Interface instantiates and appends to a
std::vector<>, which is generally unsafe in this context. However, that
code responds to exc requests. The mach_exc equivalent,
SimplifiedMachExcServer<MachExcTraits>::Interface, does not use a vector
at all.

This also enables support code in the form of CompositeMachMessageServer
and UniversalExceptionRaise, all of the tests for
CompositeMachMessageServer, and most of the test for
exc_server_variants.cc. The multiprocess-based exc_server_variants tests
remain disabled on iOS.

Bug: crashpad:31
Change-Id: I530ca3e6e10ff176c45c46941d4b8035c8cb97f1
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/2159287
Reviewed-by: Justin Cohen <justincohen@chromium.org>
Commit-Queue: Mark Mentovai <mark@chromium.org>
GitOrigin-RevId: 64b8791f4523bbae346b35bd5bf34b80f4431e49