[strong] Check arity of functions

src/hydrogen.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/hydrogen.h"
 
 #include <sstream>
 
 #include "src/v8.h"
 
@@ skipping 8103 matching lines @@
     }
   }
 
   // Generate the deoptimization data for the unoptimized version of
   // the target function if we don't already have it.
   if (!Compiler::EnsureDeoptimizationSupport(&target_info)) {
     TraceInline(target, caller, "could not generate deoptimization info");
     return false;
   }
 
+  // In strong mode it is an error to call a function with too few arguments.
+  // In that case do not inline because then the arity check would be skipped.
+  if (is_strong(function->language_mode()) &&
+      arguments_count < function->parameter_count()) {
+    TraceInline(target, caller,
+                "too few arguments passed to a strong function");
+    return false;
+  }
+
   // ----------------------------------------------------------------
   // After this point, we've made a decision to inline this function (so
   // TryInline should always return true).
 
   // Type-check the inlined function.
   DCHECK(target_shared->has_deoptimization_support());
   AstTyper::Run(&target_info);
 
   int inlining_id = 0;
   if (top_info()->is_tracking_positions()) {
@@ skipping 4995 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal