diff --git a/plugins/GSdx/GSDrawScanlineCodeGenerator.cpp b/plugins/GSdx/GSDrawScanlineCodeGenerator.cpp
index 90c941638e..ce3e1b6801 100644
--- a/plugins/GSdx/GSDrawScanlineCodeGenerator.cpp
+++ b/plugins/GSdx/GSDrawScanlineCodeGenerator.cpp
@@ -100,6 +100,9 @@ GSDrawScanlineCodeGenerator::GSDrawScanlineCodeGenerator(void* param, uint64 key
 {
 	m_sel.key = key;
 
+	if(m_sel.breakpoint)
+		int3();
+
 	Generate();
 }
 
diff --git a/plugins/GSdx/GSFunctionMap.h b/plugins/GSdx/GSFunctionMap.h
index ab2f065798..5b6cc281d9 100644
--- a/plugins/GSdx/GSFunctionMap.h
+++ b/plugins/GSdx/GSFunctionMap.h
@@ -26,6 +26,8 @@
 #include "xbyak/xbyak.h"
 #include "xbyak/xbyak_util.h"
 
+#include "GSScanlineEnvironment.h"
+
 template<class KEY, class VALUE> class GSFunctionMap
 {
 protected:
@@ -161,6 +163,7 @@ class GSCodeGeneratorFunctionMap : public GSFunctionMap<KEY, VALUE>
 	void* m_param;
 	hash_map<uint64, VALUE> m_cgmap;
 	GSCodeBuffer m_cb;
+	size_t m_total_code_size;
 
 	enum {MAX_SIZE = 8192};
 
@@ -168,9 +171,15 @@ public:
 	GSCodeGeneratorFunctionMap(const char* name, void* param)
 		: m_name(name)
 		, m_param(param)
+		, m_total_code_size(0)
 	{
 	}
 
+	~GSCodeGeneratorFunctionMap()
+	{
+		fprintf(stderr, "%s generated %zu bytes of instruction\n", m_name.c_str(), m_total_code_size);
+	}
+
 	VALUE GetDefaultFunction(KEY key)
 	{
 		VALUE ret = NULL;
@@ -183,10 +192,19 @@ public:
 		}
 		else
 		{
-			CG* cg = new CG(m_param, key, m_cb.GetBuffer(MAX_SIZE), MAX_SIZE);
+			void* code_ptr = m_cb.GetBuffer(MAX_SIZE);
 
+			CG* cg = new CG(m_param, key, code_ptr, MAX_SIZE);
 			ASSERT(cg->getSize() < MAX_SIZE);
 
+#if 0
+			fprintf(stderr, "%s Location:%p Size:%zu Key:%llx\n", m_name.c_str(), code_ptr, cg->getSize(), (uint64)key);
+			GSScanlineSelector sel(key);
+			sel.Print();
+#endif
+
+			m_total_code_size += cg->getSize();
+
 			m_cb.ReleaseBuffer(cg->getSize());
 
 			ret = (VALUE)cg->getCode();
diff --git a/plugins/GSdx/GSScanlineEnvironment.h b/plugins/GSdx/GSScanlineEnvironment.h
index e9f0551e40..115c10a3db 100644
--- a/plugins/GSdx/GSScanlineEnvironment.h
+++ b/plugins/GSdx/GSScanlineEnvironment.h
@@ -69,6 +69,8 @@ union GSScanlineSelector
 		uint32 mmin:2; // 53
 		uint32 notest:1; // 54 (no ztest, no atest, no date, no scissor test, and horizontally aligned to 4 pixels)
 		// TODO: 1D texture flag? could save 2 texture reads and 4 lerps with bilinear, and also the texture coordinate clamp/wrap code in one direction
+
+		uint32 breakpoint:1; // Insert a trap to stop the program, helpful to stop debugger on a program
 	};
 
 	struct
@@ -76,6 +78,7 @@ union GSScanlineSelector
 		uint32 _pad1:22;
 		uint32 ababcd:8;
 		uint32 _pad2:2;
+
 		uint32 fb:2;
 		uint32 _pad3:1;
 		uint32 zb:2;
@@ -89,6 +92,9 @@ union GSScanlineSelector
 
 	uint64 key;
 
+	GSScanlineSelector() = default;
+	GSScanlineSelector(uint64 k) : key(k) {}
+
 	operator uint32() const {return lo;}
 	operator uint64() const {return key;}
 
@@ -103,6 +109,18 @@ union GSScanlineSelector
 			&& date == 0
 			&& fge == 0;
 	}
+
+	void Print() const
+	{
+		fprintf(stderr, "fpsm:%d zpsm:%d ztst:%d ztest:%d atst:%d afail:%d iip:%d rfb:%d fb:%d zb:%d zw:%d "
+				"tfx:%d tcc:%d fst:%d ltf:%d tlu:%d wms:%d wmt:%d mmin:%d lcm:%d tw:%d "
+				"fba:%d cclamp:%d date:%d datm:%d "
+				"prim:%d abe:%d %d%d%d%d fge:%d dthe:%d notest:%d\n",
+				fpsm, zpsm, ztst, ztest, atst, afail, iip, rfb, fb, zb, zwrite,
+				tfx, tcc, fst, ltf, tlu, wms, wmt, mmin, lcm, tw,
+				fba, colclamp, date, datm,
+				prim, abe, aba, abb, abc, abd , fge, dthe, notest);
+	}
 };
 
 struct alignas(32) GSScanlineGlobalData // per batch variables, this is like a pixel shader constant buffer