Add IsDebuggerPresent for macOS and iOS platforms

Source/Engine/Platform/Apple/ApplePlatform.cpp

@@ -245,13 +245,40 @@ void ApplePlatform::GetUTCTime(int32& year, int32& month, int32& dayOfWeek, int3
     millisecond = time.tv_usec / 1000;
 }
 
+#if !BUILD_RELEASE
+
 void ApplePlatform::Log(const StringView& msg)
 {
-#if !BUILD_RELEASE && !USE_EDITOR
+#if !USE_EDITOR
     NSLog(@"%s", StringAsANSI<>(*msg, msg.Length()).Get());
 #endif
 }
 
+bool ApplePlatform::IsDebuggerPresent()
+{
+    // Reference: https://developer.apple.com/library/archive/qa/qa1361/_index.html
+    int mib[4];
+    struct kinfo_proc info;
+
+    // Initialize the flags so that, if sysctl fails for some bizarre reason, we get a predictable result
+    info.kp_proc.p_flag = 0;
+
+    // Initialize mib, which tells sysctl the info we want, in this case we're looking for information about a specific process ID
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_PROC;
+    mib[2] = KERN_PROC_PID;
+    mib[3] = getpid();
+
+    // Call sysctl
+    size_t size = sizeof(info);
+    sysctl(mib, sizeof(mib) / sizeof(*mib), &info, &size, NULL, 0);
+
+    // We're being debugged if the P_TRACED flag is set
+    return ((info.kp_proc.p_flag & P_TRACED) != 0);
+}
+
+#endif
+
 bool ApplePlatform::Init()
 {
     if (UnixPlatform::Init())

Source/Engine/Platform/Apple/ApplePlatform.h

@@ -79,7 +79,10 @@ public:
     static uint64 GetClockFrequency();
     static void GetSystemTime(int32& year, int32& month, int32& dayOfWeek, int32& day, int32& hour, int32& minute, int32& second, int32& millisecond);
     static void GetUTCTime(int32& year, int32& month, int32& dayOfWeek, int32& day, int32& hour, int32& minute, int32& second, int32& millisecond);
+#if !BUILD_RELEASE
     static void Log(const StringView& msg);
+    static bool IsDebuggerPresent();
+#endif
     static bool Init();
     static void Tick();
     static void BeforeExit();