From 374e660b78869b7dc64bb03865f4f8382dc98cb0 Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Sat, 20 Oct 2018 19:07:52 -0300
Subject: [PATCH] Print stack trace on invalid memory accesses (#461)

* Print stack trace on invalid memory accesses

* Rebased, change code region base address for 39-bits address space, print stack trace on break and undefined instructions too
---
 Events/AInvalidAccessEventArgs.cs | 14 ++++++++++++++
 Memory/AMemory.cs                 |  7 +++++++
 2 files changed, 21 insertions(+)
 create mode 100644 Events/AInvalidAccessEventArgs.cs

diff --git a/Events/AInvalidAccessEventArgs.cs b/Events/AInvalidAccessEventArgs.cs
new file mode 100644
index 0000000..a5c472a
--- /dev/null
+++ b/Events/AInvalidAccessEventArgs.cs
@@ -0,0 +1,14 @@
+using System;
+
+namespace ChocolArm64.Events
+{
+    public class AInvalidAccessEventArgs : EventArgs
+    {
+        public long Position { get; private set; }
+
+        public AInvalidAccessEventArgs(long Position)
+        {
+            this.Position = Position;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Memory/AMemory.cs b/Memory/AMemory.cs
index bb6a2b5..2854871 100644
--- a/Memory/AMemory.cs
+++ b/Memory/AMemory.cs
@@ -1,3 +1,4 @@
+using ChocolArm64.Events;
 using ChocolArm64.Exceptions;
 using ChocolArm64.State;
 using System;
@@ -51,6 +52,8 @@ namespace ChocolArm64.Memory
 
         private byte*** PageTable;
 
+        public event EventHandler<AInvalidAccessEventArgs> InvalidAccess;
+
         public AMemory(IntPtr Ram)
         {
             Monitors = new Dictionary<int, ArmMonitor>();
@@ -512,6 +515,8 @@ Unmapped:
                 return (byte*)Ptr + (Position & PageMask);
             }
 
+            InvalidAccess?.Invoke(this, new AInvalidAccessEventArgs(Position));
+
             throw new VmmPageFaultException(Position);
         }
 
@@ -560,6 +565,8 @@ Unmapped:
                 return (byte*)Ptr + (Position & PageMask);
             }
 
+            InvalidAccess?.Invoke(this, new AInvalidAccessEventArgs(Position));
+
             throw new VmmPageFaultException(Position);
         }