steipete/Architecture.swift

## Architecture.swift
@objc(PSTArchitecture) class Architecture: NSObject {
    /// Check if process runs under Rosetta 2.
    ///
    /// Use to disable tests that use WebKit when running on Apple Silicon
    /// FB8920323: Crash in WebKit memory allocator on Apple Silicon when  iOS below 14
    /// Crash is in JavaScriptCore: bmalloc::HeapConstants::HeapConstants(std::__1::lock_guard<bmalloc::Mutex> const&)
    @objc class var isRosettaEmulated: Bool {
        // Issue is specific to Simulator, not real devices
        #if targetEnvironment(simulator)
        return processIsTranslated() == EMULATED_EXECUTION
        #else
        return false
        #endif
    }
}

let NATIVE_EXECUTION = Int32(0)
let EMULATED_EXECUTION = Int32(1)
let UNKNOWN_EXECUTION = -Int32(1)

/// Test if the process runs natively or under Rosetta
/// https://developer.apple.com/forums/thread/652667?answerId=618217022&page=1#622923022
private func processIsTranslated() -> Int32 {
    let key = "sysctl.proc_translated"
    var ret = Int32(0)
    var size: Int = 0
    sysctlbyname(key, nil, &size, nil, 0)
    let result = sysctlbyname(key, &ret, &size, nil, 0)
    if result == -1 {
        if errno == ENOENT {
            return 0
        }
        return -1
    }
    return ret
}
	@objc(PSTArchitecture) class Architecture: NSObject {
	/// Check if process runs under Rosetta 2.
	///
	/// Use to disable tests that use WebKit when running on Apple Silicon
	/// FB8920323: Crash in WebKit memory allocator on Apple Silicon when iOS below 14
	/// Crash is in JavaScriptCore: bmalloc::HeapConstants::HeapConstants(std::__1::lock_guard<bmalloc::Mutex> const&)
	@objc class var isRosettaEmulated: Bool {
	// Issue is specific to Simulator, not real devices
	#if targetEnvironment(simulator)
	return processIsTranslated() == EMULATED_EXECUTION
	#else
	return false
	#endif
	}
	}

	let NATIVE_EXECUTION = Int32(0)
	let EMULATED_EXECUTION = Int32(1)
	let UNKNOWN_EXECUTION = -Int32(1)

	/// Test if the process runs natively or under Rosetta
	/// https://developer.apple.com/forums/thread/652667?answerId=618217022&page=1#622923022
	private func processIsTranslated() -> Int32 {
	let key = "sysctl.proc_translated"
	var ret = Int32(0)
	var size: Int = 0
	sysctlbyname(key, nil, &size, nil, 0)
	let result = sysctlbyname(key, &ret, &size, nil, 0)
	if result == -1 {
	if errno == ENOENT {
	return 0
	}
	return -1
	}
	return ret
	}