[compiler] Allow debug compilation for top-level eval.

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 <memory>
 
 #include "src/asmjs/asm-js.h"
@@ skipping 1100 matching lines @@
                                ? info->isolate()->counters()->compile_eval()
                                : info->isolate()->counters()->compile();
     HistogramTimerScope timer(rate);
     TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"),
                  parse_info->is_eval() ? "V8.CompileEval" : "V8.Compile");
 
     // Allocate a shared function info object.
     DCHECK_EQ(kNoSourcePosition, lit->function_token_position());
     result = NewSharedFunctionInfoForLiteral(isolate, lit, script);
     result->set_is_toplevel(true);
-    if (parse_info->is_eval()) {
-      // Eval scripts cannot be (re-)compiled without context.
-      result->set_allows_lazy_compilation_without_context(false);
-    }
     parse_info->set_shared_info(result);
 
     // Compile the code.
     if (!CompileUnoptimizedCode(info)) {
       return Handle<SharedFunctionInfo>::null();
     }
 
     // Update the shared function info with the scope info.
     InstallSharedScopeInfo(info, result);
 
@@ skipping 155 matching lines @@
 }
 
 bool Compiler::CompileDebugCode(Handle<SharedFunctionInfo> shared) {
   Isolate* isolate = shared->GetIsolate();
   DCHECK(AllowCompilation::IsAllowed(isolate));
 
   // Start a compilation.
   Zone zone(isolate->allocator());
   ParseInfo parse_info(&zone, shared);
   CompilationInfo info(&parse_info, Handle<JSFunction>::null());
-  DCHECK(shared->allows_lazy_compilation_without_context());
-  DCHECK(!IsEvalToplevel(shared));
+  if (IsEvalToplevel(shared)) {
+    parse_info.set_eval();
+    parse_info.set_toplevel();
+    parse_info.set_allow_lazy_parsing(false);
+    parse_info.set_lazy(false);
+  }
   info.MarkAsDebug();
   if (GetUnoptimizedCode(&info).is_null()) {
     isolate->clear_pending_exception();
     return false;
   }
 
   // Check postconditions on success.
   DCHECK(!isolate->has_pending_exception());
   DCHECK(shared->is_compiled());
   DCHECK(shared->HasDebugCode());
@@ skipping 576 matching lines @@
     DCHECK(shared->is_compiled());
     function->set_literals(cached.literals);
   } else if (shared->is_compiled()) {
     // TODO(mvstanton): pass pretenure flag to EnsureLiterals.
     JSFunction::EnsureLiterals(function);
   }
 }
 
 }  // namespace internal
 }  // namespace v8