--- a/js/src/jstracer.cpp
+++ b/js/src/jstracer.cpp
@@ -67,16 +67,19 @@
 #define HOTLOOP 2
 
 /* Number of times we wait to exit on a side exit before we try to extend the tree. */
 #define HOTEXIT 0
 
 /* Number of backedges permitted before a loop is terminated */
 #define MAX_XJUMPS 5
 
+/* Max call depths or inlining */
+#define MAX_CALLDEPTH 5
+
 #ifdef DEBUG
 #define ABORT_TRACE(msg)   do { fprintf(stdout, "abort: %d: %s\n", __LINE__, msg); return false; } while(0)
 #else
 #define ABORT_TRACE(msg)   return false
 #endif
 
 #ifdef DEBUG
 static struct {
@@ -1967,17 +1970,18 @@ TraceRecorder::clearFrameSlotsFromCache(
         nativeFrameTracker.set(vp, (LIns*)0);
     for (vp = &fp->slots[0], vpstop = &fp->slots[fp->script->nslots]; vp < vpstop; ++vp)
         nativeFrameTracker.set(vp, (LIns*)0);
 }
 
 bool
 TraceRecorder::record_EnterFrame()
 {
-    ++callDepth;
+    if (++callDepth >= MAX_CALLDEPTH)
+        ABORT_TRACE("exceeded maximum call depth");
     JSStackFrame* fp = cx->fp;
     LIns* void_ins = lir->insImm(JSVAL_TO_BOOLEAN(JSVAL_VOID));
     unsigned n;
     for (n = 0; n < fp->script->nfixed; ++n)
         set(&fp->slots[n], void_ins, true);
     return true;
 }