Add debug mode flag to force recompiling debug code for verification.

src/compiler.cc

 // Copyright 2012 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/compiler.h"
 
 #include <algorithm>
 
 #include "src/ast-numbering.h"
 #include "src/bootstrapper.h"
@@ skipping 641 matching lines @@
     Isolate* isolate = info->isolate();
     if (!isolate->has_pending_exception()) isolate->StackOverflow();
     return false;
   }
   return true;
 }
 
 
 MUST_USE_RESULT static MaybeHandle<Code> GetUnoptimizedCodeCommon(
     CompilationInfo* info) {
-  VMState<COMPILER> state(info->isolate());
-  PostponeInterruptsScope postpone(info->isolate());
+  Isolate* isolate = info->isolate();
+  VMState<COMPILER> state(isolate);
+  PostponeInterruptsScope postpone(isolate);
 
   // Parse and update CompilationInfo with the results.
   if (!Parser::ParseStatic(info->parse_info())) return MaybeHandle<Code>();
   Handle<SharedFunctionInfo> shared = info->shared_info();
   FunctionLiteral* lit = info->function();
   shared->set_language_mode(lit->language_mode());
   SetExpectedNofPropertiesFromEstimate(shared, lit->expected_property_count());
   MaybeDisableOptimization(shared, lit->dont_optimize_reason());
 
   // Compile unoptimized code.
   if (!CompileUnoptimizedCode(info)) return MaybeHandle<Code>();
 
   CHECK_EQ(Code::FUNCTION, info->code()->kind());
   RecordFunctionCompilation(Logger::LAZY_COMPILE_TAG, info, shared);
 
   // Update the shared function info with the scope info. Allocating the
   // ScopeInfo object may cause a GC.
   Handle<ScopeInfo> scope_info =
-      ScopeInfo::Create(info->isolate(), info->zone(), info->scope());
+      ScopeInfo::Create(isolate, info->zone(), info->scope());
   shared->set_scope_info(*scope_info);
 
   // Update the code and feedback vector for the shared function info.
   shared->ReplaceCode(*info->code());
   shared->set_feedback_vector(*info->feedback_vector());
 
+#ifdef DEBUG
+  if (FLAG_always_recompile_debug && !isolate->debug()->is_active() &&
+      !info->closure().is_null() &&
+      info->shared_info()->IsSubjectToDebugging()) {
+    Compiler::CompileDebugCode(info->closure());
+  }
+#endif
+
   return info->code();
 }
 
 
 MUST_USE_RESULT static MaybeHandle<Code> GetCodeFromOptimizedCodeMap(
     Handle<JSFunction> function, BailoutId osr_ast_id) {
   Handle<SharedFunctionInfo> shared(function->shared());
   DisallowHeapAllocation no_gc;
   CodeAndLiterals cached = shared->SearchOptimizedCodeMap(
       function->context()->native_context(), osr_ast_id);
@@ skipping 971 matching lines @@
 
 
 #if DEBUG
 void CompilationInfo::PrintAstForTesting() {
   PrintF("--- Source from AST ---\n%s\n",
          PrettyPrinter(isolate(), zone()).PrintProgram(function()));
 }
 #endif
 }  // namespace internal
 }  // namespace v8