xnu turns hardware faults into Mach exceptions, so the only signal left
to register is SIGABRT, which never starts off as a hardware fault.
Installing a handler for other signals would lead to recording
exceptions twice. As a consequence, Crashpad will not generate
intermediate dumps for anything manually calling raise(SIG*). In
practice, this doesn’t actually happen for crash signals that originate
as hardware faults.
Change-Id: I1be669d10e89b8e8ebcc69cfdf79c1ee20c96f76
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/3403042
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>
496d522cc4