[Executorch] Make module constructors uniform across

Pull Request resolved: #15729

Existing constructors dont compose well such that if you want data loader or data files constructor then you cannot get to override memory allocator.
Fix that.
ghstack-source-id: 324721909
@exported-using-ghexport

Differential Revision: [D86120037](https://our.internmc.facebook.com/intern/diff/D86120037/)

Author: kimishpatel

extension/module/module.cpp

@@ -78,11 +78,17 @@ runtime::Result<std::unique_ptr<runtime::DataLoader>> make_data_loader(
 Module::Module(
     const std::string& file_path,
     const LoadMode load_mode,
+    std::unique_ptr<runtime::MemoryAllocator> memory_allocator,
+    std::unique_ptr<runtime::MemoryAllocator> temp_allocator,
     std::unique_ptr<runtime::EventTracer> event_tracer)
     : file_path_(file_path),
       load_mode_(load_mode),
-      memory_allocator_(std::make_unique<MallocMemoryAllocator>()),
-      temp_allocator_(std::make_unique<MallocMemoryAllocator>()),
+      memory_allocator_(
+          memory_allocator ? std::move(memory_allocator)
+                           : std::make_unique<MallocMemoryAllocator>()),
+      temp_allocator_(
+          temp_allocator ? std::move(temp_allocator)
+                         : std::make_unique<MallocMemoryAllocator>()),
       event_tracer_(std::move(event_tracer)) {
   runtime::runtime_init();
 }
@@ -91,11 +97,17 @@ Module::Module(
     const std::string& file_path,
     const std::string& data_map_path,
     const LoadMode load_mode,
+    std::unique_ptr<runtime::MemoryAllocator> memory_allocator,
+    std::unique_ptr<runtime::MemoryAllocator> temp_allocator,
     std::unique_ptr<runtime::EventTracer> event_tracer)
     : file_path_(file_path),
       load_mode_(load_mode),
-      memory_allocator_(std::make_unique<MallocMemoryAllocator>()),
-      temp_allocator_(std::make_unique<MallocMemoryAllocator>()),
+      memory_allocator_(
+          memory_allocator ? std::move(memory_allocator)
+                           : std::make_unique<MallocMemoryAllocator>()),
+      temp_allocator_(
+          temp_allocator ? std::move(temp_allocator)
+                         : std::make_unique<MallocMemoryAllocator>()),
       event_tracer_(std::move(event_tracer)) {
   if (!data_map_path.empty()) {
     data_files_.push_back(data_map_path);
@@ -107,12 +119,18 @@ Module::Module(
     const std::string& file_path,
     std::vector<std::string> data_files,
     const LoadMode load_mode,
+    std::unique_ptr<runtime::MemoryAllocator> memory_allocator,
+    std::unique_ptr<runtime::MemoryAllocator> temp_allocator,
     std::unique_ptr<runtime::EventTracer> event_tracer)
     : file_path_(file_path),
       data_files_(std::move(data_files)),
       load_mode_(load_mode),
-      memory_allocator_(std::make_unique<MallocMemoryAllocator>()),
-      temp_allocator_(std::make_unique<MallocMemoryAllocator>()),
+      memory_allocator_(
+          memory_allocator ? std::move(memory_allocator)
+                           : std::make_unique<MallocMemoryAllocator>()),
+      temp_allocator_(
+          temp_allocator ? std::move(temp_allocator)
+                         : std::make_unique<MallocMemoryAllocator>()),
       event_tracer_(std::move(event_tracer)) {
   runtime::runtime_init();
 }

extension/module/module.h

@@ -63,6 +63,8 @@ class Module {
   explicit Module(
       const std::string& file_path,
       const LoadMode load_mode = LoadMode::File,
+      std::unique_ptr<runtime::MemoryAllocator> memory_allocator = nullptr,
+      std::unique_ptr<runtime::MemoryAllocator> temp_allocator = nullptr,
       std::unique_ptr<runtime::EventTracer> event_tracer = nullptr);
 
   /**
@@ -78,6 +80,8 @@ class Module {
       const std::string& file_path,
       const std::string& data_map_path,
       const LoadMode load_mode = LoadMode::File,
+      std::unique_ptr<runtime::MemoryAllocator> memory_allocator = nullptr,
+      std::unique_ptr<runtime::MemoryAllocator> temp_allocator = nullptr,
       std::unique_ptr<runtime::EventTracer> event_tracer = nullptr);
 
   /**
@@ -93,6 +97,8 @@ class Module {
       const std::string& file_path,
       std::vector<std::string> data_files,
       const LoadMode load_mode = LoadMode::File,
+      std::unique_ptr<runtime::MemoryAllocator> memory_allocator = nullptr,
+      std::unique_ptr<runtime::MemoryAllocator> temp_allocator = nullptr,
       std::unique_ptr<runtime::EventTracer> event_tracer = nullptr);
 
   /**