[codegen] Assert that deserialized SFIs have correct origins

Re-use the same check we already have in place for the
compilation cache for when we use CodeSerializer::Deserialize.

- Move HasOrigin to SharedFunctionInfo::HasMatchingOrigin
- HasMatchingOrigin no longer allocates
- Pass ScriptDetails in more places

Bug: v8:10284
Change-Id: I6e074bd1e7db9a35fdf7123d04a65841d9813e02
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3090968
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76451}

src/codegen/compilation-cache.cc

@@ -105,41 +105,6 @@ void CompilationSubCache::Remove(Handle<SharedFunctionInfo> function_info) {
 CompilationCacheScript::CompilationCacheScript(Isolate* isolate)
     : CompilationSubCache(isolate, 1) {}
 
-namespace {
-
-// 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 HasOrigin(Isolate* isolate, Handle<SharedFunctionInfo> function_info,
-               const ScriptDetails& script_details) {
-  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.
-  Handle<Object> name;
-  if (!script_details.name_obj.ToHandle(&name)) {
-    return script->name().IsUndefined(isolate);
-  }
-  // Do the fast bailout checks first.
-  if (script_details.line_offset != script->line_offset()) return false;
-  if (script_details.column_offset != script->column_offset()) return false;
-  // Check that both names are strings. If not, no match.
-  if (!name->IsString() || !script->name().IsString()) return false;
-  // Are the origin_options same?
-  if (script_details.origin_options.Flags() !=
-      script->origin_options().Flags()) {
-    return false;
-  }
-  // Compare the two name strings for equality.
-  if (!String::Equals(isolate, Handle<String>::cast(name),
-                      Handle<String>(String::cast(script->name()), isolate))) {
-    return false;
-  }
-  // TODO(10284): Enable host-defined options check again
-  return true;
-}
-}  // namespace
-
 // 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
@@ -162,7 +127,7 @@ MaybeHandle<SharedFunctionInfo> CompilationCacheScript::Lookup(
     if (probe.ToHandle(&function_info)) {
       // Break when we've found a suitable shared function info that
       // matches the origin.
-      if (HasOrigin(isolate(), function_info, script_details)) {
+      if (function_info->HasMatchingOrigin(isolate(), script_details)) {
         result = scope.CloseAndEscape(function_info);
       }
     }
@@ -173,9 +138,7 @@ MaybeHandle<SharedFunctionInfo> CompilationCacheScript::Lookup(
   // handle created in the caller's handle scope.
   Handle<SharedFunctionInfo> function_info;
   if (result.ToHandle(&function_info)) {
-    // Since HasOrigin can allocate, we need to protect the SharedFunctionInfo
-    // with handles during the call.
-    DCHECK(HasOrigin(isolate(), function_info, script_details));
+    DCHECK(function_info->HasMatchingOrigin(isolate(), script_details));
     isolate()->counters()->compilation_cache_hits()->Increment();
     LOG(isolate(), CompilationCacheEvent("hit", "script", *function_info));
   } else {

src/codegen/compiler.cc

@@ -1706,10 +1706,10 @@ void BackgroundDeserializeTask::Run() {
 
 MaybeHandle<SharedFunctionInfo> BackgroundDeserializeTask::Finish(
     Isolate* isolate, Handle<String> source,
-    ScriptOriginOptions origin_options) {
+    const ScriptDetails& script_details) {
   return CodeSerializer::FinishOffThreadDeserialize(
       isolate, std::move(off_thread_data_), &cached_data_, source,
-      origin_options);
+      script_details);
 }
 
 // ----------------------------------------------------------------------------
@@ -2884,11 +2884,11 @@ MaybeHandle<SharedFunctionInfo> GetSharedFunctionInfoForScriptImpl(
                    "V8.CompileDeserialize");
       if (deserialize_task) {
         // If there's a cache consume task, finish it.
-        maybe_result = deserialize_task->Finish(isolate, source,
-                                                script_details.origin_options);
+        maybe_result =
+            deserialize_task->Finish(isolate, source, script_details);
       } else {
-        maybe_result = CodeSerializer::Deserialize(
-            isolate, cached_data, source, script_details.origin_options);
+        maybe_result = CodeSerializer::Deserialize(isolate, cached_data, source,
+                                                   script_details);
       }
 
       bool consuming_code_cache_succeeded = false;
@@ -2906,6 +2906,11 @@ MaybeHandle<SharedFunctionInfo> GetSharedFunctionInfoForScriptImpl(
         compile_timer.set_consuming_code_cache_failed();
       }
     }
+    if (!maybe_result.is_null()) {
+      // Assert we end up with compatible SFIs.
+      DCHECK(maybe_result.ToHandleChecked()->HasMatchingOrigin(isolate,
+                                                               script_details));
+    }
   }
 
   if (maybe_result.is_null()) {
@@ -3025,7 +3030,7 @@ MaybeHandle<JSFunction> Compiler::GetWrappedFunction(
     TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"),
                  "V8.CompileDeserialize");
     maybe_result = CodeSerializer::Deserialize(isolate, cached_data, source,
-                                               script_details.origin_options);
+                                               script_details);
     if (maybe_result.is_null()) {
       // Deserializer failed. Fall through to compile.
       compile_timer.set_consuming_code_cache_failed();

src/codegen/compiler.h

@@ -600,7 +600,7 @@ class V8_EXPORT_PRIVATE BackgroundDeserializeTask {
 
   MaybeHandle<SharedFunctionInfo> Finish(Isolate* isolate,
                                          Handle<String> source,
-                                         ScriptOriginOptions origin_options);
+                                         const ScriptDetails& script_details);
 
   bool rejected() const { return cached_data_.rejected(); }
 

src/codegen/script-details.h

@@ -15,6 +15,8 @@ namespace internal {
 struct ScriptDetails {
   ScriptDetails()
       : line_offset(0), column_offset(0), repl_mode(REPLMode::kNo) {}
+  explicit ScriptDetails(ScriptOriginOptions origin_options)
+      : ScriptDetails(Handle<Object>(), origin_options) {}
   explicit ScriptDetails(
       Handle<Object> script_name,
       ScriptOriginOptions origin_options = v8::ScriptOriginOptions())

src/objects/shared-function-info.cc

@@ -8,6 +8,7 @@
 #include "src/ast/scopes.h"
 #include "src/codegen/compilation-cache.h"
 #include "src/codegen/compiler.h"
+#include "src/codegen/script-details.h"
 #include "src/common/globals.h"
 #include "src/diagnostics/code-tracer.h"
 #include "src/objects/shared-function-info-inl.h"
@@ -713,5 +714,62 @@ void SharedFunctionInfo::UninstallDebugBytecode(SharedFunctionInfo shared,
                                       kReleaseStore);
 }
 
+// static
+
+// 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 SharedFunctionInfo::HasMatchingOrigin(
+    Isolate* isolate, const ScriptDetails& script_details) const {
+  DisallowGarbageCollection no_gc;
+  Script script = Script::cast(this->script());
+  // If the script name isn't set, the boilerplate script should have
+  // an undefined name to have the same origin.
+  Object name_obj;
+  {
+    Handle<Object> tmp_handle;
+    if (script_details.name_obj.ToHandle(&tmp_handle)) {
+      name_obj = *tmp_handle;
+    } else {
+      return script.name().IsUndefined(isolate);
+    }
+  }
+  // Do the fast bailout checks first.
+  if (script_details.line_offset != script.line_offset()) return false;
+  if (script_details.column_offset != script.column_offset()) return false;
+  // Check that both names are strings. If not, no match.
+  if (!name_obj.IsString() || !script.name().IsString()) return false;
+  // Are the origin_options same?
+  if (script_details.origin_options.Flags() !=
+      script.origin_options().Flags()) {
+    return false;
+  }
+  if (!String::cast(name_obj).Equals(String::cast(script.name()))) return false;
+
+  // TODO(10284): Enable strict checks again.
+  // FixedArray host_defined_options;
+  // {
+  //   Handle<FixedArray> tmp_handle;
+  //   if (script_details.host_defined_options.ToHandle(&tmp_handle)) {
+  //     host_defined_options = *tmp_handle;
+  //   } else {
+  //     host_defined_options = ReadOnlyRoots(isolate).empty_fixed_array();
+  //   }
+  // }
+  // FixedArray script_options = script.host_defined_options();
+  // if (host_defined_options == script_options) return true;
+  // int length = host_defined_options.length();
+  // if (length != script_options.length()) return false;
+  // for (int i = 0; i < length; i++) {
+  //   // host-defined options is a v8::PrimitiveArray.
+  //   DCHECK(host_defined_options.get(i).IsPrimitive());
+  //   DCHECK(script_options.get(i).IsPrimitive());
+  //   if (!host_defined_options.get(i).StrictEquals(script_options.get(i))) {
+  //     return false;
+  //   }
+  // }
+  return true;
+}
+
 }  // namespace internal
 }  // namespace v8

src/objects/shared-function-info.h

@@ -38,6 +38,7 @@ class DebugInfo;
 class IsCompiledScope;
 template <typename>
 class Signature;
+struct ScriptDetails;
 class WasmCapiFunctionData;
 class WasmExportedFunctionData;
 class WasmJSFunctionData;
@@ -207,6 +208,9 @@ class SharedFunctionInfo
                                    int function_literal_id,
                                    bool reset_preparsed_scope_data = true);
 
+  bool HasMatchingOrigin(Isolate* isolate,
+                         const ScriptDetails& script_details) const;
+
   // Layout description of the optimized code map.
   static const int kEntriesStart = 0;
   static const int kContextOffset = 0;
@@ -240,8 +244,9 @@ class SharedFunctionInfo
   // Updates the scope info if available.
   V8_EXPORT_PRIVATE void SetPosition(int start_position, int end_position);
 
-  // [outer scope info | feedback metadata] Shared storage for outer scope info
-  // (on uncompiled functions) and feedback metadata (on compiled functions).
+  // [outer scope info | feedback metadata] Shared storage for outer scope
+  // info (on uncompiled functions) and feedback metadata (on compiled
+  // functions).
   DECL_ACCESSORS(raw_outer_scope_info_or_feedback_metadata, HeapObject)
   DECL_ACQUIRE_GETTER(raw_outer_scope_info_or_feedback_metadata, HeapObject)
  private:
@@ -255,8 +260,8 @@ class SharedFunctionInfo
   inline bool HasOuterScopeInfo() const;
   inline ScopeInfo GetOuterScopeInfo() const;
 
-  // [feedback metadata] Metadata template for feedback vectors of instances of
-  // this function.
+  // [feedback metadata] Metadata template for feedback vectors of instances
+  // of this function.
   inline bool HasFeedbackMetadata() const;
   inline bool HasFeedbackMetadata(AcquireLoadTag tag) const;
   inline FeedbackMetadata feedback_metadata() const;
@@ -268,9 +273,9 @@ class SharedFunctionInfo
   // for some period of time, use IsCompiledScope instead.
   inline bool is_compiled() const;
 
-  // Returns an IsCompiledScope which reports whether the function is compiled,
-  // and if compiled, will avoid the function becoming uncompiled while it is
-  // held.
+  // Returns an IsCompiledScope which reports whether the function is
+  // compiled, and if compiled, will avoid the function becoming uncompiled
+  // while it is held.
   template <typename IsolateT>
   inline IsCompiledScope is_compiled_scope(IsolateT* isolate) const;
 

src/snapshot/code-serializer.cc

@@ -10,6 +10,7 @@
 #include "src/base/platform/elapsed-timer.h"
 #include "src/base/platform/platform.h"
 #include "src/codegen/macro-assembler.h"
+#include "src/codegen/script-details.h"
 #include "src/common/globals.h"
 #include "src/debug/debug.h"
 #include "src/handles/maybe-handles.h"
@@ -74,8 +75,10 @@ ScriptCompiler::CachedData* CodeSerializer::Serialize(
   // Serialize code object.
   Handle<String> source(String::cast(script->source()), isolate);
   HandleScope scope(isolate);
-  CodeSerializer cs(isolate, SerializedCodeData::SourceHash(
-                                 source, script->origin_options()));
+  ScriptDetails script_details(handle(script->name(), isolate),
+                               script->origin_options());
+  CodeSerializer cs(isolate,
+                    SerializedCodeData::SourceHash(source, script_details));
   DisallowGarbageCollection no_gc;
   cs.reference_map()->AddAttachedReference(*source);
   AlignedCachedData* cached_data = cs.SerializeSharedFunctionInfo(info);
@@ -291,12 +294,12 @@ class StressOffThreadDeserializeThread final : public base::Thread {
         CodeSerializer::StartDeserializeOffThread(&local_isolate, cached_data_);
   }
 
-  MaybeHandle<SharedFunctionInfo> Finalize(Isolate* isolate,
-                                           Handle<String> source,
-                                           ScriptOriginOptions origin_options) {
+  MaybeHandle<SharedFunctionInfo> Finalize(
+      Isolate* isolate, Handle<String> source,
+      const ScriptDetails& script_details) {
     return CodeSerializer::FinishOffThreadDeserialize(
         isolate, std::move(off_thread_data_), cached_data_, source,
-        origin_options);
+        script_details);
   }
 
  private:
@@ -369,19 +372,72 @@ void FinalizeDeserialization(Isolate* isolate,
   }
 }
 
+void CompareSFIs(Handle<SharedFunctionInfo> main_thread,
+                 Handle<SharedFunctionInfo> off_thread) {
+  DisallowGarbageCollection no_gc;
+  DCHECK_EQ(main_thread->flags(kRelaxedLoad), off_thread->flags(kRelaxedLoad));
+  DCHECK_EQ(main_thread->flags2(), off_thread->flags2());
+  DCHECK_EQ(main_thread->raw_function_token_offset(),
+            off_thread->raw_function_token_offset());
+  DCHECK_EQ(main_thread->internal_formal_parameter_count(),
+            off_thread->internal_formal_parameter_count());
+  DCHECK(main_thread->Name().Equals(off_thread->Name()));
+  if (!main_thread->script().IsScript()) {
+    DCHECK(!off_thread->script().IsScript());
+    return;
+  }
+  Script main_thread_script = Script::cast(main_thread->script());
+#ifdef DEBUG
+  Script off_thread_script = Script::cast(off_thread->script());
+#endif
+  DCHECK_EQ(main_thread_script.flags(), off_thread_script.flags());
+  DCHECK_EQ(main_thread_script.script_type(), off_thread_script.script_type());
+  if (main_thread_script.source().IsString()) {
+    DCHECK(String::cast(main_thread_script.source())
+               .Equals(String::cast(off_thread_script.source())));
+  } else {
+    DCHECK(!off_thread_script.source().IsString());
+  }
+  if (main_thread_script.source_url().IsString()) {
+    DCHECK(String::cast(main_thread_script.source())
+               .Equals(String::cast(off_thread_script.source())));
+  } else {
+    DCHECK(!off_thread_script.source_url().IsString());
+  }
+  if (main_thread_script.name().IsString()) {
+    DCHECK(String::cast(main_thread_script.name())
+               .Equals(String::cast(off_thread_script.name())));
+  } else {
+    DCHECK(!off_thread_script.name().IsString());
+  }
+}
+
 }  // namespace
 
 MaybeHandle<SharedFunctionInfo> CodeSerializer::Deserialize(
     Isolate* isolate, AlignedCachedData* cached_data, Handle<String> source,
-    ScriptOriginOptions origin_options) {
+    const ScriptDetails& script_details) {
   if (FLAG_stress_background_compile) {
     StressOffThreadDeserializeThread thread(isolate, cached_data);
     CHECK(thread.Start());
     thread.Join();
-    return thread.Finalize(isolate, source, origin_options);
-    // TODO(leszeks): Compare off-thread deserialized data to on-thread.
-  }
+    MaybeHandle<SharedFunctionInfo> off_thread_result =
+        thread.Finalize(isolate, source, script_details);
+    MaybeHandle<SharedFunctionInfo> main_thread_result =
+        DeserializeMain(isolate, cached_data, source, script_details);
+    DCHECK_EQ(off_thread_result.is_null(), main_thread_result.is_null());
+    if (!main_thread_result.is_null()) {
+      CompareSFIs(main_thread_result.ToHandleChecked(),
+                  off_thread_result.ToHandleChecked());
+    }
+    return off_thread_result;
+  }
+  return DeserializeMain(isolate, cached_data, source, script_details);
+}
 
+MaybeHandle<SharedFunctionInfo> CodeSerializer::DeserializeMain(
+    Isolate* isolate, AlignedCachedData* cached_data, Handle<String> source,
+    const ScriptDetails& script_details) {
   base::ElapsedTimer timer;
   if (FLAG_profile_deserialization || FLAG_log_function_events) timer.Start();
 
@@ -390,7 +446,7 @@ MaybeHandle<SharedFunctionInfo> CodeSerializer::Deserialize(
   SerializedCodeData::SanityCheckResult sanity_check_result =
       SerializedCodeData::CHECK_SUCCESS;
   const SerializedCodeData scd = SerializedCodeData::FromCachedData(
-      cached_data, SerializedCodeData::SourceHash(source, origin_options),
+      cached_data, SerializedCodeData::SourceHash(source, script_details),
       &sanity_check_result);
   if (sanity_check_result != SerializedCodeData::CHECK_SUCCESS) {
     if (FLAG_profile_deserialization) PrintF("[Cached code failed check]\n");
@@ -410,7 +466,6 @@ MaybeHandle<SharedFunctionInfo> CodeSerializer::Deserialize(
     if (FLAG_profile_deserialization) PrintF("[Deserializing failed]\n");
     return MaybeHandle<SharedFunctionInfo>();
   }
-
   if (FLAG_profile_deserialization) {
     double ms = timer.Elapsed().InMillisecondsF();
     int length = cached_data->length();
@@ -444,7 +499,6 @@ CodeSerializer::StartDeserializeOffThread(LocalIsolate* local_isolate,
   MaybeHandle<SharedFunctionInfo> local_maybe_result =
       OffThreadObjectDeserializer::DeserializeSharedFunctionInfo(
           local_isolate, &scd, &result.scripts);
-
   result.maybe_result =
       local_isolate->heap()->NewPersistentMaybeHandle(local_maybe_result);
   result.persistent_handles = local_isolate->heap()->DetachPersistentHandles();
@@ -455,7 +509,7 @@ CodeSerializer::StartDeserializeOffThread(LocalIsolate* local_isolate,
 MaybeHandle<SharedFunctionInfo> CodeSerializer::FinishOffThreadDeserialize(
     Isolate* isolate, OffThreadDeserializeData&& data,
     AlignedCachedData* cached_data, Handle<String> source,
-    ScriptOriginOptions origin_options) {
+    const ScriptDetails& script_details) {
   base::ElapsedTimer timer;
   if (FLAG_profile_deserialization || FLAG_log_function_events) timer.Start();
 
@@ -465,7 +519,7 @@ MaybeHandle<SharedFunctionInfo> CodeSerializer::FinishOffThreadDeserialize(
   SerializedCodeData::SanityCheckResult sanity_check_result =
       SerializedCodeData::CHECK_SUCCESS;
   const SerializedCodeData scd = SerializedCodeData::FromCachedData(
-      cached_data, SerializedCodeData::SourceHash(source, origin_options),
+      cached_data, SerializedCodeData::SourceHash(source, script_details),
       &sanity_check_result);
   if (sanity_check_result != SerializedCodeData::CHECK_SUCCESS) {
     // The only case where the deserialization result could exist despite a
@@ -581,11 +635,12 @@ SerializedCodeData::SanityCheckWithoutSource() const {
 }
 
 uint32_t SerializedCodeData::SourceHash(Handle<String> source,
-                                        ScriptOriginOptions origin_options) {
+                                        const ScriptDetails& script_details) {
   const uint32_t source_length = source->length();
 
   static constexpr uint32_t kModuleFlagMask = (1 << 31);
-  const uint32_t is_module = origin_options.IsModule() ? kModuleFlagMask : 0;
+  const uint32_t is_module =
+      script_details.origin_options.IsModule() ? kModuleFlagMask : 0;
   DCHECK_EQ(0, source_length & kModuleFlagMask);
 
   return source_length | is_module;

src/snapshot/code-serializer.h

@@ -13,6 +13,7 @@ namespace v8 {
 namespace internal {
 
 class PersistentHandles;
+struct ScriptDetails;
 
 class V8_EXPORT_PRIVATE AlignedCachedData {
  public:
@@ -68,7 +69,7 @@ class CodeSerializer : public Serializer {
 
   V8_WARN_UNUSED_RESULT static MaybeHandle<SharedFunctionInfo> Deserialize(
       Isolate* isolate, AlignedCachedData* cached_data, Handle<String> source,
-      ScriptOriginOptions origin_options);
+      const ScriptDetails& script_details);
 
   V8_WARN_UNUSED_RESULT static OffThreadDeserializeData
   StartDeserializeOffThread(LocalIsolate* isolate,
@@ -78,7 +79,7 @@ class CodeSerializer : public Serializer {
   FinishOffThreadDeserialize(Isolate* isolate, OffThreadDeserializeData&& data,
                              AlignedCachedData* cached_data,
                              Handle<String> source,
-                             ScriptOriginOptions origin_options);
+                             const ScriptDetails& script_details);
 
   uint32_t source_hash() const { return source_hash_; }
 
@@ -91,9 +92,12 @@ class CodeSerializer : public Serializer {
 
  private:
   void SerializeObjectImpl(Handle<HeapObject> o) override;
-
   bool SerializeReadOnlyObject(Handle<HeapObject> obj);
 
+  V8_WARN_UNUSED_RESULT static MaybeHandle<SharedFunctionInfo> DeserializeMain(
+      Isolate* isolate, AlignedCachedData* cached_data, Handle<String> source,
+      const ScriptDetails& script_details);
+
   DISALLOW_GARBAGE_COLLECTION(no_gc_)
   uint32_t source_hash_;
 };
@@ -145,7 +149,7 @@ class SerializedCodeData : public SerializedData {
   base::Vector<const byte> Payload() const;
 
   static uint32_t SourceHash(Handle<String> source,
-                             ScriptOriginOptions origin_options);
+                             const ScriptDetails& script_details);
 
  private:
   explicit SerializedCodeData(AlignedCachedData* data);

test/cctest/heap/test-heap.cc

@@ -1490,8 +1490,7 @@ TEST(CompilationCacheCachingBehavior) {
   // The script should be in the cache now.
   {
     v8::HandleScope scope(CcTest::isolate());
-    ScriptDetails script_details(Handle<Object>(),
-                                 v8::ScriptOriginOptions(true, false));
+    ScriptDetails script_details(v8::ScriptOriginOptions(true, false));
     MaybeHandle<SharedFunctionInfo> cached_script =
         compilation_cache->LookupScript(source, script_details, language_mode);
     CHECK(!cached_script.is_null());
@@ -1501,8 +1500,7 @@ TEST(CompilationCacheCachingBehavior) {
   {
     CcTest::CollectAllGarbage();
     v8::HandleScope scope(CcTest::isolate());
-    ScriptDetails script_details(Handle<Object>(),
-                                 v8::ScriptOriginOptions(true, false));
+    ScriptDetails script_details(v8::ScriptOriginOptions(true, false));
     MaybeHandle<SharedFunctionInfo> cached_script =
         compilation_cache->LookupScript(source, script_details, language_mode);
     CHECK(!cached_script.is_null());
@@ -1521,8 +1519,7 @@ TEST(CompilationCacheCachingBehavior) {
   {
     v8::HandleScope scope(CcTest::isolate());
     // Ensure code aging cleared the entry from the cache.
-    ScriptDetails script_details(Handle<Object>(),
-                                 v8::ScriptOriginOptions(true, false));
+    ScriptDetails script_details(v8::ScriptOriginOptions(true, false));
     MaybeHandle<SharedFunctionInfo> cached_script =
         compilation_cache->LookupScript(source, script_details, language_mode);
     CHECK(cached_script.is_null());

test/cctest/test-log.cc

@@ -707,6 +707,7 @@ UNINITIALIZED_TEST(ExternalCodeEventListener) {
 UNINITIALIZED_TEST(ExternalCodeEventListenerInnerFunctions) {
   i::FLAG_log = false;
   i::FLAG_prof = false;
+  i::FLAG_stress_background_compile = false;
 
   v8::ScriptCompiler::CachedData* cache;
   static const char* source_cstring =

test/cctest/test-serialize.cc

@@ -4129,7 +4129,9 @@ TEST(WeakArraySerializationInCodeCache) {
                            .ToHandleChecked();
   AlignedCachedData* cache = nullptr;
 
-  ScriptDetails script_details(src);
+  // TODO(leszeks): Fix off-thread deserialization.
+  ScriptDetails script_details(
+      isolate->factory()->NewStringFromAsciiChecked(source));
   CompileScriptAndProduceCache(isolate, src, script_details, &cache,
                                v8::ScriptCompiler::kNoCompileOptions);