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

2 files changed, 21 insertions, 0 deletions

diff --git a/ChocolArm64/Events/AInvalidAccessEventArgs.cs b/ChocolArm64/Events/AInvalidAccessEventArgs.cs
new file mode 100644
index 00000000..a5c472a8
--- /dev/null
+++ b/ChocolArm64/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/ChocolArm64/Memory/AMemory.cs b/ChocolArm64/Memory/AMemory.cs
index bb6a2b54..2854871e 100644
--- a/ChocolArm64/Memory/AMemory.cs
+++ b/ChocolArm64/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);
         }