src: apply ABI-breaking API simplifications

c566a04c86, 06bb6b42b3 and 3aaeb309b3 included recent
modifications of the C++ API that had mechanisms for ABI compatibility
in place so that they would not be breaking changes.

This commit removes these compatibility mechanisms.

PR-URL: https://github.com/nodejs/node/pull/46705
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>

src/api/environment.cc

@@ -269,8 +269,7 @@ void SetIsolateMiscHandlers(v8::Isolate* isolate, const IsolateSettings& s) {
 
   auto* modify_code_generation_from_strings_callback =
       ModifyCodeGenerationFromStrings;
-  if (s.flags & ALLOW_MODIFY_CODE_GENERATION_FROM_STRINGS_CALLBACK &&
+  if (s.modify_code_generation_from_strings_callback != nullptr) {
-      s.modify_code_generation_from_strings_callback) {
     modify_code_generation_from_strings_callback =
         s.modify_code_generation_from_strings_callback;
   }
@@ -382,18 +381,6 @@ Isolate* NewIsolate(std::shared_ptr<ArrayBufferAllocator> allocator,
                     settings);
 }
 
-Isolate* NewIsolate(ArrayBufferAllocator* allocator,
-                    uv_loop_t* event_loop,
-                    MultiIsolatePlatform* platform) {
-  return NewIsolate(allocator, event_loop, platform, nullptr);
-}
-
-Isolate* NewIsolate(std::shared_ptr<ArrayBufferAllocator> allocator,
-                    uv_loop_t* event_loop,
-                    MultiIsolatePlatform* platform) {
-  return NewIsolate(allocator, event_loop, platform, nullptr);
-}
-
 IsolateData* CreateIsolateData(
     Isolate* isolate,
     uv_loop_t* loop,
@@ -405,13 +392,6 @@ IsolateData* CreateIsolateData(
   return new IsolateData(isolate, loop, platform, allocator, snapshot_data);
 }
 
-IsolateData* CreateIsolateData(Isolate* isolate,
-                               uv_loop_t* loop,
-                               MultiIsolatePlatform* platform,
-                               ArrayBufferAllocator* allocator) {
-  return CreateIsolateData(isolate, loop, platform, allocator, nullptr);
-}
-
 void FreeIsolateData(IsolateData* isolate_data) {
   delete isolate_data;
 }

src/node.cc

@@ -1270,10 +1270,6 @@ int Start(int argc, char** argv) {
   return static_cast<int>(StartInternal(argc, argv));
 }
 
-int Stop(Environment* env) {
-  return Stop(env, StopFlags::kNoFlags);
-}
-
 int Stop(Environment* env, StopFlags::Flags flags) {
   env->ExitEnv(flags);
   return 0;

src/node.h

@@ -317,8 +317,8 @@ NODE_EXTERN int Start(int argc, char* argv[]);
 
 // Tear down Node.js while it is running (there are active handles
 // in the loop and / or actively executing JavaScript code).
-NODE_EXTERN int Stop(Environment* env);
+NODE_EXTERN int Stop(Environment* env,
-NODE_EXTERN int Stop(Environment* env, StopFlags::Flags flags);
+                     StopFlags::Flags flags = StopFlags::kNoFlags);
 
 // Set up per-process state needed to run Node.js. This will consume arguments
 // from argv, fill exec_argv, and possibly add errors resulting from parsing
@@ -463,7 +463,7 @@ enum IsolateSettingsFlags {
   DETAILED_SOURCE_POSITIONS_FOR_PROFILING = 1 << 1,
   SHOULD_NOT_SET_PROMISE_REJECTION_CALLBACK = 1 << 2,
   SHOULD_NOT_SET_PREPARE_STACK_TRACE_CALLBACK = 1 << 3,
-  ALLOW_MODIFY_CODE_GENERATION_FROM_STRINGS_CALLBACK = 1 << 4,
+  ALLOW_MODIFY_CODE_GENERATION_FROM_STRINGS_CALLBACK = 0, /* legacy no-op */
 };
 
 struct IsolateSettings {
@@ -565,25 +565,17 @@ NODE_EXTERN void SetIsolateUpForNode(v8::Isolate* isolate);
 // This is a convenience method equivalent to using SetIsolateCreateParams(),
 // Isolate::Allocate(), MultiIsolatePlatform::RegisterIsolate(),
 // Isolate::Initialize(), and SetIsolateUpForNode().
-NODE_EXTERN v8::Isolate* NewIsolate(ArrayBufferAllocator* allocator,
+NODE_EXTERN v8::Isolate* NewIsolate(
-                                    struct uv_loop_s* event_loop,
+    ArrayBufferAllocator* allocator,
-                                    MultiIsolatePlatform* platform = nullptr);
-// TODO(addaleax): Merge with the function definition above.
-NODE_EXTERN v8::Isolate* NewIsolate(ArrayBufferAllocator* allocator,
     struct uv_loop_s* event_loop,
     MultiIsolatePlatform* platform,
-                                    const EmbedderSnapshotData* snapshot_data,
+    const EmbedderSnapshotData* snapshot_data = nullptr,
     const IsolateSettings& settings = {});
-NODE_EXTERN v8::Isolate* NewIsolate(
-    std::shared_ptr<ArrayBufferAllocator> allocator,
-    struct uv_loop_s* event_loop,
-    MultiIsolatePlatform* platform);
-// TODO(addaleax): Merge with the function definition above.
 NODE_EXTERN v8::Isolate* NewIsolate(
     std::shared_ptr<ArrayBufferAllocator> allocator,
     struct uv_loop_s* event_loop,
     MultiIsolatePlatform* platform,
-    const EmbedderSnapshotData* snapshot_data,
+    const EmbedderSnapshotData* snapshot_data = nullptr,
     const IsolateSettings& settings = {});
 
 // Creates a new context with Node.js-specific tweaks.
@@ -603,14 +595,8 @@ NODE_EXTERN IsolateData* CreateIsolateData(
     v8::Isolate* isolate,
     struct uv_loop_s* loop,
     MultiIsolatePlatform* platform = nullptr,
-    ArrayBufferAllocator* allocator = nullptr);
+    ArrayBufferAllocator* allocator = nullptr,
-// TODO(addaleax): Merge with the function definition above.
+    const EmbedderSnapshotData* snapshot_data = nullptr);
-NODE_EXTERN IsolateData* CreateIsolateData(
-    v8::Isolate* isolate,
-    struct uv_loop_s* loop,
-    MultiIsolatePlatform* platform,
-    ArrayBufferAllocator* allocator,
-    const EmbedderSnapshotData* snapshot_data);
 NODE_EXTERN void FreeIsolateData(IsolateData* isolate_data);
 
 struct ThreadId {