Use ParseInfo fields instead of isolate.

A step towards removing isolate from ParseInfo.
Removing isolate from ParseInfo will make it easier to create and
execute parse tasks on background threads.

BUG=v8:6093

Change-Id: If5e7ba2f76f9f8422c26f47c9f0eb5b197114b25
Reviewed-on: https://chromium-review.googlesource.com/458000Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Wiktor Garbacz <wiktorg@google.com>
Cr-Commit-Position: refs/heads/master@{#44089}

src/background-parsing-task.cc

@@ -34,7 +34,6 @@ BackgroundParsingTask::BackgroundParsingTask(
   info->set_isolate(isolate);
   info->set_source_stream(source->source_stream.get());
   info->set_source_stream_encoding(source->encoding);
-  info->set_hash_seed(isolate->heap()->HashSeed());
   info->set_unicode_cache(&source_->unicode_cache);
   info->set_compile_options(options);
   info->set_allow_lazy_parsing();

src/compiler.cc

@@ -489,7 +489,7 @@ void SetSharedFunctionFlagsFromLiteral(FunctionLiteral* literal,
 
 bool Renumber(ParseInfo* parse_info,
               Compiler::EagerInnerFunctionLiterals* eager_literals) {
-  RuntimeCallTimerScope runtimeTimer(parse_info->isolate(),
+  RuntimeCallTimerScope runtimeTimer(parse_info->runtime_call_stats(),
                                      &RuntimeCallStats::CompileRenumber);
 
   // CollectTypeProfile uses its own feedback slots. If we have existing
@@ -505,10 +505,9 @@ bool Renumber(ParseInfo* parse_info,
         parse_info->shared_info()->feedback_metadata()->HasTypeProfileSlot();
   }
 
-  if (!AstNumbering::Renumber(
-          parse_info->isolate()->stack_guard()->real_climit(),
-          parse_info->zone(), parse_info->literal(), eager_literals,
-          collect_type_profile)) {
+  if (!AstNumbering::Renumber(parse_info->stack_limit(), parse_info->zone(),
+                              parse_info->literal(), eager_literals,
+                              collect_type_profile)) {
     return false;
   }
   if (!parse_info->shared_info().is_null()) {
@@ -1276,7 +1275,7 @@ Handle<SharedFunctionInfo> CompileToplevel(CompilationInfo* info) {
 bool Compiler::Analyze(ParseInfo* info,
                        EagerInnerFunctionLiterals* eager_literals) {
   DCHECK_NOT_NULL(info->literal());
-  RuntimeCallTimerScope runtimeTimer(info->isolate(),
+  RuntimeCallTimerScope runtimeTimer(info->runtime_call_stats(),
                                      &RuntimeCallStats::CompileAnalyse);
   if (!Rewriter::Rewrite(info)) return false;
   DeclarationScope::Analyze(info, AnalyzeMode::kRegular);

src/parsing/parse-info.cc

@@ -37,29 +37,29 @@ ParseInfo::ParseInfo(AccountingAllocator* zone_allocator)
       isolate_(nullptr),
       cached_data_(nullptr),
       ast_value_factory_(nullptr),
+      ast_string_constants_(nullptr),
       function_name_(nullptr),
+      runtime_call_stats_(nullptr),
       literal_(nullptr),
       deferred_handles_(nullptr) {}
 
 ParseInfo::ParseInfo(Handle<SharedFunctionInfo> shared)
     : ParseInfo(shared->GetIsolate()->allocator()) {
-  isolate_ = shared->GetIsolate();
+  Isolate* isolate = shared->GetIsolate();
 
+  set_isolate(isolate);
   set_toplevel(shared->is_toplevel());
   set_allow_lazy_parsing(FLAG_lazy_inner_functions);
-  set_hash_seed(isolate_->heap()->HashSeed());
   set_is_named_expression(shared->is_named_expression());
   set_calls_eval(shared->scope_info()->CallsEval());
   set_compiler_hints(shared->compiler_hints());
   set_start_position(shared->start_position());
   set_end_position(shared->end_position());
   function_literal_id_ = shared->function_literal_id();
-  set_stack_limit(isolate_->stack_guard()->real_climit());
-  set_unicode_cache(isolate_->unicode_cache());
   set_language_mode(shared->language_mode());
   set_shared_info(shared);
   set_module(shared->kind() == FunctionKind::kModule);
-  set_scope_info_is_empty(shared->scope_info() == ScopeInfo::Empty(isolate_));
+  set_scope_info_is_empty(shared->scope_info() == ScopeInfo::Empty(isolate));
 
   Handle<Script> script(Script::cast(shared->script()));
   set_script(script);
@@ -67,7 +67,7 @@ ParseInfo::ParseInfo(Handle<SharedFunctionInfo> shared)
   set_eval(script->compilation_type() == Script::COMPILATION_TYPE_EVAL);
 
   Handle<HeapObject> scope_info(shared->outer_scope_info());
-  if (!scope_info->IsTheHole(isolate()) &&
+  if (!scope_info->IsTheHole(isolate) &&
       Handle<ScopeInfo>::cast(scope_info)->length() > 0) {
     set_outer_scope_info(Handle<ScopeInfo>::cast(scope_info));
   }
@@ -81,13 +81,9 @@ ParseInfo::ParseInfo(Handle<SharedFunctionInfo> shared,
 
 ParseInfo::ParseInfo(Handle<Script> script)
     : ParseInfo(script->GetIsolate()->allocator()) {
-  isolate_ = script->GetIsolate();
-
+  set_isolate(script->GetIsolate());
   set_allow_lazy_parsing();
   set_toplevel();
-  set_hash_seed(isolate_->heap()->HashSeed());
-  set_stack_limit(isolate_->stack_guard()->real_climit());
-  set_unicode_cache(isolate_->unicode_cache());
   set_script(script);
 
   set_native(script->type() == Script::TYPE_NATIVE);
@@ -106,19 +102,16 @@ ParseInfo::~ParseInfo() {
 ParseInfo* ParseInfo::AllocateWithoutScript(Handle<SharedFunctionInfo> shared) {
   Isolate* isolate = shared->GetIsolate();
   ParseInfo* p = new ParseInfo(isolate->allocator());
-  p->isolate_ = isolate;
 
+  p->set_isolate(isolate);
   p->set_toplevel(shared->is_toplevel());
   p->set_allow_lazy_parsing(FLAG_lazy_inner_functions);
-  p->set_hash_seed(isolate->heap()->HashSeed());
   p->set_is_named_expression(shared->is_named_expression());
   p->set_calls_eval(shared->scope_info()->CallsEval());
   p->set_compiler_hints(shared->compiler_hints());
   p->set_start_position(shared->start_position());
   p->set_end_position(shared->end_position());
   p->function_literal_id_ = shared->function_literal_id();
-  p->set_stack_limit(isolate->stack_guard()->real_climit());
-  p->set_unicode_cache(isolate->unicode_cache());
   p->set_language_mode(shared->language_mode());
   p->set_shared_info(shared);
   p->set_module(shared->kind() == FunctionKind::kModule);
@@ -164,6 +157,17 @@ void ParseInfo::set_deferred_handles(DeferredHandles* deferred_handles) {
   deferred_handles_.reset(deferred_handles);
 }
 
+void ParseInfo::InitFromIsolate(Isolate* isolate) {
+  DCHECK_NOT_NULL(isolate);
+  set_hash_seed(isolate->heap()->HashSeed());
+  set_stack_limit(isolate->stack_guard()->real_climit());
+  set_unicode_cache(isolate->unicode_cache());
+  set_tail_call_elimination_enabled(
+      isolate->is_tail_call_elimination_enabled());
+  set_runtime_call_stats(isolate->counters()->runtime_call_stats());
+  set_ast_string_constants(isolate->ast_string_constants());
+}
+
 #ifdef DEBUG
 bool ParseInfo::script_is_native() const {
   return script_->type() == Script::TYPE_NATIVE;

src/parsing/parse-info.h

@@ -20,10 +20,12 @@ namespace internal {
 
 class AccountingAllocator;
 class AstRawString;
+class AstStringConstants;
 class AstValueFactory;
 class DeclarationScope;
 class DeferredHandles;
 class FunctionLiteral;
+class RuntimeCallStats;
 class ScriptData;
 class SharedFunctionInfo;
 class UnicodeCache;
@@ -42,6 +44,8 @@ class V8_EXPORT_PRIVATE ParseInfo {
 
   ~ParseInfo();
 
+  void InitFromIsolate(Isolate* isolate);
+
   static ParseInfo* AllocateWithoutScript(Handle<SharedFunctionInfo> shared);
 
   Zone* zone() const { return zone_.get(); }
@@ -74,6 +78,8 @@ class V8_EXPORT_PRIVATE ParseInfo {
   FLAG_ACCESSOR(kDebug, is_debug, set_is_debug)
   FLAG_ACCESSOR(kSerializing, will_serialize, set_will_serialize)
   FLAG_ACCESSOR(kScopeInfoIsEmpty, scope_info_is_empty, set_scope_info_is_empty)
+  FLAG_ACCESSOR(kTailCallEliminationEnabled, is_tail_call_elimination_enabled,
+                set_tail_call_elimination_enabled)
 
 #undef FLAG_ACCESSOR
 
@@ -185,6 +191,19 @@ class V8_EXPORT_PRIVATE ParseInfo {
     max_function_literal_id_ = max_function_literal_id;
   }
 
+  const AstStringConstants* ast_string_constants() const {
+    return ast_string_constants_;
+  }
+  void set_ast_string_constants(
+      const AstStringConstants* ast_string_constants) {
+    ast_string_constants_ = ast_string_constants;
+  }
+
+  RuntimeCallStats* runtime_call_stats() const { return runtime_call_stats_; }
+  void set_runtime_call_stats(RuntimeCallStats* runtime_call_stats) {
+    runtime_call_stats_ = runtime_call_stats;
+  }
+
   // Getters for individual compiler hints.
   bool is_declaration() const;
   FunctionKind function_kind() const;
@@ -199,7 +218,12 @@ class V8_EXPORT_PRIVATE ParseInfo {
     return maybe_outer_scope_info_;
   }
   void clear_script() { script_ = Handle<Script>::null(); }
-  void set_isolate(Isolate* isolate) { isolate_ = isolate; }
+  void set_isolate(Isolate* isolate) {
+    if (isolate) {
+      InitFromIsolate(isolate);
+    }
+    isolate_ = isolate;
+  }
   void set_shared_info(Handle<SharedFunctionInfo> shared) { shared_ = shared; }
   void set_outer_scope_info(Handle<ScopeInfo> outer_scope_info) {
     maybe_outer_scope_info_ = outer_scope_info;
@@ -249,8 +273,8 @@ class V8_EXPORT_PRIVATE ParseInfo {
     kDebug = 1 << 10,
     kSerializing = 1 << 11,
     kScopeInfoIsEmpty = 1 << 12,
-    // ---------- Output flags --------------------------
-    kAstValueFactoryOwned = 1 << 13
+    kTailCallEliminationEnabled = 1 << 13,
+    kAstValueFactoryOwned = 1 << 14,
   };
 
   //------------- Inputs to parsing and scope analysis -----------------------
@@ -283,7 +307,9 @@ class V8_EXPORT_PRIVATE ParseInfo {
   ScriptData** cached_data_;  // used if available, populated if requested.
   PreParsedScopeData preparsed_scope_data_;
   AstValueFactory* ast_value_factory_;  // used if available, otherwise new.
+  const class AstStringConstants* ast_string_constants_;
   const AstRawString* function_name_;
+  RuntimeCallStats* runtime_call_stats_;
 
   //----------- Output of parsing and scope analysis ------------------------
   FunctionLiteral* literal_;

src/parsing/parser.cc

@@ -503,8 +503,7 @@ Expression* Parser::NewV8Intrinsic(const AstRawString* name,
 Parser::Parser(ParseInfo* info)
     : ParserBase<Parser>(info->zone(), &scanner_, info->stack_limit(),
                          info->extension(), info->ast_value_factory(),
-                         info->isolate()->counters()->runtime_call_stats(),
-                         true),
+                         info->runtime_call_stats(), true),
       scanner_(info->unicode_cache()),
       reusable_preparser_(nullptr),
       mode_(PARSE_EAGERLY),  // Lazy mode must be set explicitly.
@@ -542,7 +541,7 @@ Parser::Parser(ParseInfo* info)
                 info->extension() == nullptr && can_compile_lazily;
   set_allow_natives(FLAG_allow_natives_syntax || info->is_native());
   set_allow_tailcalls(FLAG_harmony_tailcalls && !info->is_native() &&
-                      info->isolate()->is_tail_call_elimination_enabled());
+                      info->is_tail_call_elimination_enabled());
   set_allow_harmony_do_expressions(FLAG_harmony_do_expressions);
   set_allow_harmony_function_sent(FLAG_harmony_function_sent);
   set_allow_harmony_restrictive_generators(FLAG_harmony_restrictive_generators);
@@ -559,7 +558,7 @@ Parser::Parser(ParseInfo* info)
   if (info->ast_value_factory() == NULL) {
     // info takes ownership of AstValueFactory.
     info->set_ast_value_factory(new AstValueFactory(
-        zone(), info->isolate()->ast_string_constants(), info->hash_seed()));
+        zone(), info->ast_string_constants(), info->hash_seed()));
     info->set_ast_value_factory_owned();
     ast_value_factory_ = info->ast_value_factory();
     ast_node_factory_.set_ast_value_factory(ast_value_factory_);

src/parsing/rewriter.cc

@@ -358,7 +358,8 @@ bool Rewriter::Rewrite(ParseInfo* info) {
   DisallowHandleDereference no_deref;
 
   RuntimeCallTimerScope runtimeTimer(
-      info->isolate(), &RuntimeCallStats::CompileRewriteReturnResult);
+      info->runtime_call_stats(),
+      &RuntimeCallStats::CompileRewriteReturnResult);
 
   FunctionLiteral* function = info->literal();
   DCHECK_NOT_NULL(function);
@@ -376,9 +377,8 @@ bool Rewriter::Rewrite(ParseInfo* info) {
   if (!body->is_empty()) {
     Variable* result = scope->AsDeclarationScope()->NewTemporary(
         info->ast_value_factory()->dot_result_string());
-    Processor processor(info->isolate()->stack_guard()->real_climit(),
-                        scope->AsDeclarationScope(), result,
-                        info->ast_value_factory());
+    Processor processor(info->stack_limit(), scope->AsDeclarationScope(),
+                        result, info->ast_value_factory());
     processor.Process(body);
 
     DCHECK_IMPLIES(scope->is_module_scope(), processor.result_assigned());