[V8] Added Script::is_debugger_script flag for embedders

src/compilation-cache.cc

 // Copyright 2011 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/v8.h"
 
 #include "src/assembler.h"
 #include "src/compilation-cache.h"
 #include "src/serialize.h"
 
@@ skipping 93 matching lines @@
 
 
 CompilationCacheScript::CompilationCacheScript(Isolate* isolate,
                                                int generations)
     : CompilationSubCache(isolate, generations) {}
 
 
 // We only re-use a cached function for some script source code if the
 // script originates from the same place. This is to avoid issues
 // when reporting errors, etc.
-bool CompilationCacheScript::HasOrigin(
-    Handle<SharedFunctionInfo> function_info,
-    Handle<Object> name,
-    int line_offset,
-    int column_offset,
-    bool is_shared_cross_origin) {
+bool CompilationCacheScript::HasOrigin(Handle<SharedFunctionInfo> function_info,
+                                       Handle<Object> name, int line_offset,
+                                       int column_offset,
+                                       bool is_embedder_debug_script,
+                                       bool is_shared_cross_origin) {
   Handle<Script> script =
       Handle<Script>(Script::cast(function_info->script()), isolate());
   // If the script name isn't set, the boilerplate script should have
   // an undefined name to have the same origin.
   if (name.is_null()) {
     return script->name()->IsUndefined();
   }
   // Do the fast bailout checks first.
   if (line_offset != script->line_offset()->value()) return false;
   if (column_offset != script->column_offset()->value()) return false;
   // Check that both names are strings. If not, no match.
   if (!name->IsString() || !script->name()->IsString()) return false;
+  // Were both scripts tagged by the embedder as being internal script?
+  if (is_embedder_debug_script != script->is_embedder_debug_script()) {
+    return false;
+  }
   // Were both scripts tagged by the embedder as being shared cross-origin?
   if (is_shared_cross_origin != script->is_shared_cross_origin()) return false;
   // Compare the two name strings for equality.
   return String::Equals(Handle<String>::cast(name),
                         Handle<String>(String::cast(script->name())));
 }
 
 
 // TODO(245): Need to allow identical code from different contexts to
 // be cached in the same script generation. Currently the first use
 // will be cached, but subsequent code from different source / line
 // won't.
 Handle<SharedFunctionInfo> CompilationCacheScript::Lookup(
-    Handle<String> source,
-    Handle<Object> name,
-    int line_offset,
-    int column_offset,
-    bool is_shared_cross_origin,
-    Handle<Context> context) {
+    Handle<String> source, Handle<Object> name, int line_offset,
+    int column_offset, bool is_embedder_debug_script,
+    bool is_shared_cross_origin, Handle<Context> context) {
   Object* result = NULL;
   int generation;
 
   // Probe the script generation tables. Make sure not to leak handles
   // into the caller's handle scope.
   { HandleScope scope(isolate());
     for (generation = 0; generation < generations(); generation++) {
       Handle<CompilationCacheTable> table = GetTable(generation);
       Handle<Object> probe = table->Lookup(source, context);
       if (probe->IsSharedFunctionInfo()) {
         Handle<SharedFunctionInfo> function_info =
             Handle<SharedFunctionInfo>::cast(probe);
         // Break when we've found a suitable shared function info that
         // matches the origin.
-        if (HasOrigin(function_info,
-                      name,
-                      line_offset,
-                      column_offset,
-                      is_shared_cross_origin)) {
+        if (HasOrigin(function_info, name, line_offset, column_offset,
+                      is_embedder_debug_script, is_shared_cross_origin)) {
           result = *function_info;
           break;
         }
       }
     }
   }
 
   // Once outside the manacles of the handle scope, we need to recheck
   // to see if we actually found a cached script. If so, we return a
   // handle created in the caller's handle scope.
   if (result != NULL) {
     Handle<SharedFunctionInfo> shared(SharedFunctionInfo::cast(result),
                                       isolate());
-    DCHECK(HasOrigin(shared,
-                     name,
-                     line_offset,
-                     column_offset,
-                     is_shared_cross_origin));
+    DCHECK(HasOrigin(shared, name, line_offset, column_offset,
+                     is_embedder_debug_script, is_shared_cross_origin));
     // If the script was found in a later generation, we promote it to
     // the first generation to let it survive longer in the cache.
     if (generation != 0) Put(source, context, shared);
     isolate()->counters()->compilation_cache_hits()->Increment();
     return shared;
   } else {
     isolate()->counters()->compilation_cache_misses()->Increment();
     return Handle<SharedFunctionInfo>::null();
   }
 }
@@ skipping 90 matching lines @@
 void CompilationCache::Remove(Handle<SharedFunctionInfo> function_info) {
   if (!IsEnabled()) return;
 
   eval_global_.Remove(function_info);
   eval_contextual_.Remove(function_info);
   script_.Remove(function_info);
 }
 
 
 MaybeHandle<SharedFunctionInfo> CompilationCache::LookupScript(
-    Handle<String> source,
-    Handle<Object> name,
-    int line_offset,
-    int column_offset,
-    bool is_shared_cross_origin,
-    Handle<Context> context) {
+    Handle<String> source, Handle<Object> name, int line_offset,
+    int column_offset, bool is_embedder_debug_script,
+    bool is_shared_cross_origin, Handle<Context> context) {
   if (!IsEnabled()) return MaybeHandle<SharedFunctionInfo>();
 
   return script_.Lookup(source, name, line_offset, column_offset,
-                        is_shared_cross_origin, context);
+                        is_embedder_debug_script, is_shared_cross_origin,
+                        context);
 }
 
 
 MaybeHandle<SharedFunctionInfo> CompilationCache::LookupEval(
     Handle<String> source, Handle<SharedFunctionInfo> outer_info,
     Handle<Context> context, StrictMode strict_mode, int scope_position) {
   if (!IsEnabled()) return MaybeHandle<SharedFunctionInfo>();
 
   MaybeHandle<SharedFunctionInfo> result;
   if (context->IsNativeContext()) {
@@ skipping 87 matching lines @@
 }
 
 
 void CompilationCache::Disable() {
   enabled_ = false;
   Clear();
 }
 
 
 } }  // namespace v8::internal