Add recursion limit for VM (#2737)

This patch adds posibility to supervise the VM call stack to avoid aborts/crashes due to the recursion calls.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu

jerry-core/vm/vm.c

@@ -42,6 +42,13 @@
  * @{
  */
 
+/*
+ * Check VM recursion depth limit
+ */
+#ifdef VM_RECURSION_LIMIT
+JERRY_STATIC_ASSERT (VM_RECURSION_LIMIT > 0, vm_recursion_limit_must_be_greater_than_zero);
+#endif /* VM_RECURSION_LIMIT */
+
 /**
  * Get the value of object[property].
  *
@@ -3515,6 +3522,10 @@ vm_execute (vm_frame_ctx_t *frame_ctx_p, /**< frame context */
         }
 #endif /* JERRY_DEBUGGER */
 
+#ifdef VM_RECURSION_LIMIT
+        JERRY_CONTEXT (vm_recursion_counter)++;
+#endif /* VM_RECURSION_LIMIT */
+
         JERRY_CONTEXT (vm_top_context_p) = frame_ctx_p->prev_context_p;
         return completion_value;
       }
@@ -3535,6 +3546,17 @@ vm_run (const ecma_compiled_code_t *bytecode_header_p, /**< byte-code data heade
         const ecma_value_t *arg_list_p, /**< arguments list */
         ecma_length_t arg_list_len) /**< length of arguments list */
 {
+#ifdef VM_RECURSION_LIMIT
+  if (JERRY_UNLIKELY (JERRY_CONTEXT (vm_recursion_counter) == 0))
+  {
+    return ecma_raise_range_error (ECMA_ERR_MSG ("VM recursion limit is exceeded."));
+  }
+  else
+  {
+    JERRY_CONTEXT (vm_recursion_counter)--;
+  }
+#endif /* VM_RECURSION_LIMIT */
+
   ecma_value_t *literal_p;
   vm_frame_ctx_t frame_ctx;
   uint32_t call_stack_size;