Move Environment.StackTrace to PclExport compat layer

Author: mythz

src/ServiceStack.Text/PclExport.Net40.cs

@@ -522,6 +522,11 @@ public override void Config(HttpWebRequest req,
             if (preAuthenticate.HasValue) req.PreAuthenticate = preAuthenticate.Value;
         }
 
+        public override string GetStackTrace()
+        {
+            return Environment.StackTrace;
+        }
+
 #if !__IOS__
         public override SetPropertyDelegate GetSetPropertyMethod(PropertyInfo propertyInfo)
         {

src/ServiceStack.Text/PclExport.cs

@@ -451,6 +451,11 @@ public virtual DataMemberAttribute GetWeakDataMember(FieldInfo pi)
         public virtual void RegisterForAot()
         {            
         }
+
+        public virtual string GetStackTrace()
+        {
+            return null;
+        }
     }
 
 }

src/ServiceStack.Text/RecyclableMemoryStream.cs

@@ -373,7 +373,7 @@ internal byte[] GetLargeBuffer(int requiredSize, string tag)
                 if (this.GenerateCallStacks)
                 {
                     // Grab the stack -- we want to know who requires such large buffers
-                    callStack = Environment.StackTrace;
+                    callStack = PclExport.Instance.GetStackTrace();
                 }
                 Events.Write.MemoryStreamNonPooledLargeBufferCreated(requiredSize, tag, callStack);
 
@@ -848,7 +848,7 @@ internal RecyclableMemoryStream(RecyclableMemoryStreamManager memoryManager, str
 
             if (this.memoryManager.GenerateCallStacks)
             {
-                this.allocationStack = Environment.StackTrace;
+                this.allocationStack = PclExport.Instance.GetStackTrace();
             }
 
             Events.Write.MemoryStreamCreated(this.id, this.tag, requestedSize);
@@ -876,7 +876,7 @@ protected override void Dispose(bool disposing)
                 string doubleDisposeStack = null;
                 if (this.memoryManager.GenerateCallStacks)
                 {
-                    doubleDisposeStack = Environment.StackTrace;
+                    doubleDisposeStack = PclExport.Instance.GetStackTrace();
                 }
 
                 Events.Write.MemoryStreamDoubleDispose(this.id, this.tag, this.allocationStack, this.disposeStack, doubleDisposeStack);
@@ -887,7 +887,7 @@ protected override void Dispose(bool disposing)
 
             if (this.memoryManager.GenerateCallStacks)
             {
-                this.disposeStack = Environment.StackTrace;
+                this.disposeStack = PclExport.Instance.GetStackTrace();
             }
 
             if (disposing)
@@ -1115,7 +1115,7 @@ public override byte[] ToArray()
             var newBuffer = new byte[this.Length];
 
             this.InternalRead(newBuffer, 0, this.length, 0);
-            string stack = this.memoryManager.GenerateCallStacks ? Environment.StackTrace : null;
+            string stack = this.memoryManager.GenerateCallStacks ? PclExport.Instance.GetStackTrace() : null;
             Events.Write.MemoryStreamToArray(this.id, this.tag, stack, 0);
             this.memoryManager.ReportStreamToArray();