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rebar 0.8.0

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@OverlordDev OverlordDev released this 08 Nov 15:14
· 1 commit to main since this release
v0.8.0
9ec9492

New in 0.8.0

arm64 apps start by themselves (experimental)

  • tools/rebar-wrap: an Intel Mac refuses an arm64-only app before anything can be hooked, so the app's main executable becomes a universal file: the original arm64 slice plus a tiny x86_64 program that starts rebar on the same file. A double click, the Dock, open, file associations and Steam then start the app through rebar; bundle, Info.plist and pid are unchanged. enable / disable (puts the original back byte for byte) / status / list / env (per-app environment) / seal / update, and a LaunchAgent that wraps new arm64-only apps as they appear.
  • Rebar launcher: a checkbox "Start apps by themselves" installs / removes that agent; the gear next to it opens a window with watched folders, a switch per app, per-app environment variables, the agent log and "Allow changes" for root-owned App Store apps.
  • Downloaded (quarantined) apps get their bundle signed ad hoc after wrapping (otherwise Gatekeeper calls them "damaged"); removing the quarantine attribute stays your decision.
  • Tried by double click: Cyberpunk 2077, ChatGPT, Gemini, MainStage, Xcode-beta.
  • WRAP=1 ./run_tests.sh runs the whole regression suite through the wrapper (174 pass, the same 5 known failures as the direct run).

Correctness

  • JIT: a ret after ldr x30 is no longer treated as a frame restore (the rule kept stale NZCV flags: Optional<URL> == crashed after a dialog). 0.7.0 has this bug: update.
  • Swift extra inhabitants: arm64 writes index i as i, the host's x86_64 runtime as 2*(i+1)/i<<1; guards for the copy / destroy of such values (Xcode's SwiftUI canvas no longer crashes when a view opens), and State / Binding wrappedValue of an Optional<any P> is converted at the call. Device Hub (Xcode's device app) starts and shows its window (there is no iOS Simulator runtime for an Intel Mac, so no simulator).
  • xcodebuild of a SwiftUI project builds under rebar: vm_allocate blocks are 16 KB aligned inside Apple's linker tools; arm64-only programs started through sandbox-exec / arch / open / NSWorkspace are started through rebar.
  • Logic Pro reaches its project chooser (system_error, CFBundle lookups, sqlite3 / CFCalendar variadics, swift_bridgeObject* guard).
  • Raw syscalls: syscall(n, ...) indirection, access / stat / sysctl and friends.
  • A thread that suspends itself no longer holds the bridge lock (TikTok's crash reporter froze the process).
  • iOS: stand-in class for a missing OpenGLES class, Swift @objc protocols registered with the host runtime, +[UIAppearance appearanceWhenContainedIn:] varargs. TikTok 47.6 now starts and reaches the network but shows no window yet; The Binding of Isaac needs OpenGL ES (not available on this Mac).

Profilers and debugging

  • REBAR_FRAMEPROF=<prefix>: a frame profiler (every frame, per-frame interval, drawable wait, CPU cores busy, time in imports, GPU time with REBAR_FRAMEPROF_GPU=1; OpenGL swaps counted too), REBAR_TIMEPROF=<prefix>: where the time of any program goes (per import / selector, host → guest entries, main run loop hangs). tools/perf/gameprof.py, tools/perf/slowstubs.py.
  • REBAR_NO_METAL_RT=1 (a driver that says YES to ray tracing makes Cyberpunk 2077 build all its path tracing kernels and its watchdog kills it).
  • Smaller aids: REBAR_TRACE_CTX, REBAR_WATCH_VAL, REBAR_TRACE_CASTFAIL, REBAR_TRACE_CASTLR, REBAR_TEST_MANGLED, REBAR_DUMP_WORDS_ON_TRAP, REBAR_TRACE_MACHEXC_BT.

Install

  • rebar-0.8.0-macos-x86_64.zip: rebar, rebar-ios, the support libraries and tools/ (ipa.py, rebar-wrap).
  • Rebar-launcher-0.8.0-macos-x86_64.zip: the launcher app with rebar inside.
Assets 5
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