Apple platforms now use the same SIGSEGV/SIGBUS handler as Linux instead of
a Mach exception port. The Mach port was only set on the installing thread,
which is the loader thread, not the one running JIT code. ARM64 had no
context definition at all.
Also pass the thread state (not the mcontext) to the handler, accept SIGBUS
fault codes, and fix restoring a disabled altstack on Darwin.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
The POSIX handler returned early for any si_code other than SEGV_MAPERR/SEGV_ACCERR,
without passing the signal on. Returning from a fault handler re-executes the
faulting instruction, so anything that keeps faulting - an MTE fault on Android
arm64, a protection-key or shadow-stack fault - became a livelock at 100% CPU rather
than a crash with a usable report. It also swallowed SIGSEGV sent via kill()
(si_code SI_USER), and meant whatever handler was installed before us, such as a
crash reporter, never ran.
The code to chain properly was already there, just inside the 'we couldn't handle
this address' branch further down - factored out and used for both.
UnitTest.exe runs on CI and from tooling, where an assert or an abort() puts
up a message box that nothing will ever click, and the run just hangs until it
is killed. Headless already solved this; move its SetupCRT() into Common
(ExceptionHandlerSetup, which is where the rest of the process-level fault
setup lives) and call it from the unit tests too.
No behaviour change for headless. The OS-level SetErrorMode() call is now
guarded for UWP, which doesn't have it.
Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01GZq8ZtJmFY7bkX5FVkr3P9
* Rename LogType to Log
* Explicitly use the Log:: enum when logging. Allows for autocomplete when editing.
* Mac/ARM64 buildfix
* Do the same with the hle result log macros
* Rename the log names to mixed case while at it.
* iOS buildfix
* Qt buildfix attempt, ARM32 buildfix
Henrik RydgårdandClaude Opus 5.5
Jean-André Santoni
oltolm
Jan Beich
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