=== modified file 'pnet/engine/debugger.c'
--- pnet/engine/debugger.c	
+++ pnet/engine/debugger.c	
@@ -2063,7 +2063,7 @@
 	/* Read current position from debug info */
 	sourceFile = GetLocation(method, offset, &line, &col);
 
-	//fprintf(stderr, "DebugHook method=%s offset=%d sourceFile=%s line=%d\n", ILMethod_Name(method), offset, sourceFile, line);
+	fprintf(stderr, "DebugHook method=%s.%s offset=%d sourceFile=%s line=%d\n", ILClass_Name(ILMethod_Owner(method)), ILMethod_Name(method), offset, sourceFile, line);
 
 	/* Continue if no debug info available */
 	if(sourceFile == 0)

=== modified file 'pnet/engine/jitc.c'
--- pnet/engine/jitc.c	
+++ pnet/engine/jitc.c	
@@ -39,7 +39,7 @@
 /*
  * For enabling extended debugging output uncomment the following define.
  */
-/* #define _IL_JIT_ENABLE_DEBUG 1 */
+#define _IL_JIT_ENABLE_DEBUG 1
 
 /*
  * For dumping the jitted function before it is compiled uncomment the
@@ -2280,11 +2280,30 @@
 }
 
 /*
+ * Debugger hook function called when breakpoint is reached.
+ */
+static void JitDebuggerHook(jit_function_t func, jit_nint data1, jit_nint data2)
+{
+	//fprintf(stderr, "hook called\n");
+
+	ILExecThread *thread = ILExecThreadCurrent();
+	_ILBreak(thread, 0);
+}
+
+/*
  * Enable debug mode in a JIT coder instance.
  */
 static void JITCoder_EnableDebug(ILCoder *coder)
 {
-	(_ILCoderToILJITCoder(coder))->debugEnabled = 1;
+	ILJITCoder *jitCoder = _ILCoderToILJITCoder(coder);
+	jitCoder->debugEnabled = 1;
+	jit_debugger_set_hook(jitCoder->context, JitDebuggerHook);
+}
+
+void ILJitInsertBreakpoint(ILCoder *coder)
+{
+	ILJITCoder *jitCoder = _ILCoderToILJITCoder(coder);
+	jit_insn_mark_breakpoint(jitCoder->jitFunction, 1, 2);
 }
 
 /*

=== modified file 'pnet/engine/jitc.h'
--- pnet/engine/jitc.h	
+++ pnet/engine/jitc.h	
@@ -168,6 +168,12 @@
 ILMethod *_ILJitGetCallingMethod(ILExecThread *thread, ILUInt32 frames);
 
 /*
+ * Get IL offset for the call frame up n slots.
+ * Returns 0 if the function at that slot is not a jitted function.
+ */
+ILInt32 _ILJitGetILOffset(ILExecThread *thread, ILUInt32 skipFrames);
+
+/*
  * Get the number of stack frames associated with an ILMethod on the current
  * call stack.
  */
@@ -225,6 +231,11 @@
 							  ILObject *delegate,
 							  ILType *delType);
 
+/*
+ * Insert breakpoint in current function.
+ */
+void ILJitInsertBreakpoint(ILCoder *coder);
+
 #endif  /* IL_USE_JIT */
 
 #endif	/* _ENGINE_JITC_H */

=== modified file 'pnet/engine/jitc_diag.c'
--- pnet/engine/jitc_diag.c	
+++ pnet/engine/jitc_diag.c	
@@ -81,6 +81,31 @@
 	};
 	/* And we return the ILMethod assigned to that jitFunction. */
 	return (ILMethod *)jit_function_get_meta(jitFunction, IL_JIT_META_METHOD);
+}
+
+/*
+ * Get IL offset for the call frame up n slots.
+ * Returns 0 if the function at that slot is not a jitted function.
+ */
+ILInt32 _ILJitGetILOffset(ILExecThread *thread, ILUInt32 skipFrames)
+{
+	ILJITCoder *jitCoder = (ILJITCoder *)(_ILExecThreadProcess(thread)->coder);
+	jit_stack_trace_t stackTrace = jit_exception_get_stack_trace();
+	ILInt32 result;
+
+	if(jitCoder && stackTrace)
+	{
+		result = jit_stack_trace_get_offset(jitCoder->context, stackTrace, skipFrames);
+		if(result == JIT_NO_OFFSET)
+		{
+			return -1;
+		}
+		else
+		{
+			return result;
+		}
+	}
+	return -1;
 }
 
 /*

=== modified file 'pnet/engine/lib_diag.c'
--- pnet/engine/lib_diag.c	
+++ pnet/engine/lib_diag.c	
@@ -158,28 +158,13 @@
 
 void _ILBreak(ILExecThread *thread, int type)
 {
-	unsigned char *start;
 	ILInt32 offset;
 	int action;
 
 	if(thread->process->debugHookFunc)
 	{
-		/* Consult the coder to convert the PC into an IL offset */
-		if(thread->method && thread->pc != IL_INVALID_PC)
-		{
-			start = (unsigned char *)ILMethodGetUserData(thread->method);
-			if(ILMethodIsConstructor(thread->method))
-			{
-				start -= ILCoderCtorOffset(thread->process->coder);
-			}
-			offset = (ILInt32)(ILCoderGetILOffset
-					(thread->process->coder, (void *)start,
-					 (ILUInt32)(thread->pc - start), 0));
-		}
-		else
-		{
-			offset = -1;
-		}
+		offset = _IL_StackFrame_InternalGetILOffset(thread, 0);
+		fprintf(stderr, "offset=%d\n", offset);
 
 		/* Call the debugger to process the breakpoint */
 		action = (*(thread->process->debugHookFunc))
@@ -311,6 +296,7 @@
 ILInt32 _IL_StackFrame_InternalGetILOffset(ILExecThread *thread,
 										   ILInt32 skipFrames)
 {
+#ifdef IL_USE_CVM
 	ILCallFrame *frame = _ILGetCallFrame(thread, skipFrames);
 	unsigned char *start;
 	if(frame && frame->method && frame->pc != IL_INVALID_PC)
@@ -330,6 +316,10 @@
 		/* Probably a native function which does not have offsets */
 		return -1;
 	}
+#endif
+#ifdef IL_USE_JIT
+	return _ILJitGetILOffset(thread, skipFrames);
+#endif
 }
 
 /*

=== modified file 'pnet/engine/verify.c'
--- pnet/engine/verify.c	
+++ pnet/engine/verify.c	
@@ -23,6 +23,9 @@
 #include "il_opcodes.h"
 #include "il_align.h"
 #include "il_debug.h"
+#ifdef IL_USE_JIT
+#include "jitc.h"
+#endif
 
 #ifdef	__cplusplus
 extern	"C" {
@@ -1129,6 +1132,10 @@
 		/* Advance to the next instruction */
 		pc += insnSize;
 		len -= insnSize;
+
+#ifdef IL_USE_JIT
+		ILJitInsertBreakpoint(coder);
+#endif
 	}
 
 	/* If the last instruction was not a jump, then the code