Add Compile API to set the location for the context binary file

include/onnxruntime/core/session/onnxruntime_c_api.h

@@ -6856,6 +6856,24 @@ struct OrtCompileApi {
    */
   ORT_API2_STATUS(ModelCompilationOptions_SetFlags, _In_ OrtModelCompilationOptions* model_compile_options,
                   size_t flags);
+
+  /** Sets information related to EP context binary file.
+   *
+   * EP uses this information to decide the location and context binary file name.
+   * Used while compiling model with input and output in memory buffer
+   *
+   * \param[in] model_compile_options The OrtModelCompilationOptions instance.
+   * \param[in] output_directory Null terminated string of the path (wchar on Windows, char otherwise).
+   * \param[in] model_name Null terminated string of the model name (wchar on Windows, char otherwise).
+   *
+   * \snippet{doc} snippets.dox OrtStatus Return Value
+   *
+   * \since Version 1.23.
+   */
+  ORT_API2_STATUS(ModelCompilationOptions_SetEpContextBinaryInformation,
+                  _In_ OrtModelCompilationOptions* model_compile_options,
+                  _In_ const ORTCHAR_T* output_directory,
+                  _In_ const ORTCHAR_T* model_name);
 };
 
 /*

include/onnxruntime/core/session/onnxruntime_cxx_api.h

@@ -1161,6 +1161,8 @@ struct ModelCompilationOptions : detail::Base<OrtModelCompilationOptions> {
                                                                   size_t initializer_size_threshold);  ///< Wraps OrtApi::ModelCompilationOptions_SetOutputModelExternalInitializersFile
   ModelCompilationOptions& SetOutputModelBuffer(OrtAllocator* allocator, void** output_model_buffer_ptr,
                                                 size_t* output_model_buffer_size_ptr);  ///< Wraps OrtApi::ModelCompilationOptions_SetOutputModelBuffer
+  ModelCompilationOptions& SetEpContextBinaryInformation(const ORTCHAR_T* output_directory,
+                                                         const ORTCHAR_T* model_name);  ///< Wraps OrtApi::ModelCompilationOptions_SetEpContextBinaryInformation
   ModelCompilationOptions& SetFlags(size_t flags);                                      ///< Wraps OrtApi::ModelCompilationOptions_SetFlags
 };
 

include/onnxruntime/core/session/onnxruntime_cxx_inline.h

@@ -819,6 +819,15 @@ inline ModelCompilationOptions& ModelCompilationOptions::SetOutputModelPath(
   return *this;
 }
 
+inline ModelCompilationOptions& ModelCompilationOptions::SetEpContextBinaryInformation(
+    const ORTCHAR_T* output_directory, const ORTCHAR_T* model_name) {
+  Ort::ThrowOnError(GetCompileApi().ModelCompilationOptions_SetEpContextBinaryInformation(
+      this->p_,
+      output_directory,
+      model_name));
+  return *this;
+}
+
 inline ModelCompilationOptions& ModelCompilationOptions::SetOutputModelExternalInitializersFile(
     const ORTCHAR_T* file_path, size_t initializer_size_threshold) {
   Ort::ThrowOnError(GetCompileApi().ModelCompilationOptions_SetOutputModelExternalInitializersFile(

onnxruntime/core/session/compile_api.cc

@@ -128,6 +128,35 @@ ORT_API_STATUS_IMPL(OrtCompileAPI::ModelCompilationOptions_SetOutputModelPath,
   API_IMPL_END
 }
 
+ORT_API_STATUS_IMPL(OrtCompileAPI::ModelCompilationOptions_SetEpContextBinaryInformation,
+                    _In_ OrtModelCompilationOptions* ort_model_compile_options,
+                    const ORTCHAR_T* output_directory,
+                    const ORTCHAR_T* model_name) {
+  API_IMPL_BEGIN
+#if !defined(ORT_MINIMAL_BUILD)
+  auto model_compile_options = reinterpret_cast<onnxruntime::ModelCompilationOptions*>(ort_model_compile_options);
+
+  std::string output_dir = PathToUTF8String(output_directory);
+  if (output_dir.empty()) {
+    return OrtApis::CreateStatus(ORT_INVALID_ARGUMENT, "Invalid output directory: path is empty");
+  }
+
+  std::string model_name_str = ToUTF8String(model_name);
+  if (model_name_str.empty()) {
+    return OrtApis::CreateStatus(ORT_INVALID_ARGUMENT, "Invalid model name: string is empty");
+  }
+
+  ORT_API_RETURN_IF_STATUS_NOT_OK(model_compile_options->SetEpContextBinaryInformation(output_dir, model_name_str));
+  return nullptr;
+#else
+  ORT_UNUSED_PARAMETER(ort_model_compile_options);
+  ORT_UNUSED_PARAMETER(output_directory);
+  ORT_UNUSED_PARAMETER(model_name);
+  return OrtApis::CreateStatus(ORT_NOT_IMPLEMENTED, "Compile API is not supported in this build");
+#endif  // !defined(ORT_MINIMAL_BUILD)
+  API_IMPL_END
+}
+
 ORT_API_STATUS_IMPL(OrtCompileAPI::ModelCompilationOptions_SetOutputModelExternalInitializersFile,
                     _In_ OrtModelCompilationOptions* ort_model_compile_options,
                     const ORTCHAR_T* external_initializers_file_path,
@@ -248,6 +277,7 @@ static constexpr OrtCompileApi ort_compile_api = {
     // End of Version 22 - DO NOT MODIFY ABOVE
 
     &OrtCompileAPI::ModelCompilationOptions_SetFlags,
+    &OrtCompileAPI::ModelCompilationOptions_SetEpContextBinaryInformation,
 };
 
 // checks that we don't violate the rule that the functions must remain in the slots they were originally assigned

onnxruntime/core/session/compile_api.h

@@ -30,5 +30,7 @@ ORT_API_STATUS_IMPL(ModelCompilationOptions_SetEpContextEmbedMode, _In_ OrtModel
 ORT_API_STATUS_IMPL(CompileModel, _In_ const OrtEnv* env, _In_ const OrtModelCompilationOptions* model_options);
 ORT_API_STATUS_IMPL(ModelCompilationOptions_SetFlags, _In_ OrtModelCompilationOptions* model_options,
                     size_t flags);
+ORT_API_STATUS_IMPL(ModelCompilationOptions_SetEpContextBinaryInformation, _In_ OrtModelCompilationOptions* model_compile_options,
+                    _In_ const ORTCHAR_T* output_dir, _In_ const ORTCHAR_T* model_name);
 
 }  // namespace OrtCompileAPI

onnxruntime/core/session/model_compilation_options.cc

@@ -72,8 +72,8 @@ Status ModelCompilationOptions::SetOutputModelPath(const std::string& output_mod
     if (log_manager != nullptr && log_manager->HasDefaultLogger()) {
       const logging::Logger& logger = log_manager->DefaultLogger();
       LOGS(logger, WARNING) << "Output model path length (" << ep_context_gen_options.output_model_file_path.size()
-                            << ") exceeds limit of " << ConfigOptions::kMaxKeyLength << " characters."
-                            << "ORT will still generated the expected output file, but EPs will see an empty "
+                            << ") exceeds limit of " << ConfigOptions::kMaxValueLength << " characters."
+                            << "ORT will still generate the expected output file, but EPs will see an empty "
                             << "output model path in SessionOption's ConfigOptions.";
     }
   }
@@ -98,6 +98,36 @@ Status ModelCompilationOptions::SetOutputModelBuffer(onnxruntime::AllocatorPtr a
   return Status::OK();
 }
 
+Status ModelCompilationOptions::SetEpContextBinaryInformation(const std::string& output_directory,
+                                                              const std::string& model_name) {
+  if (output_directory.empty() || model_name.empty()) {
+    return ORT_MAKE_STATUS(ONNXRUNTIME, INVALID_ARGUMENT, "output_dir or model_name is empty.");
+  }
+
+  std::filesystem::path output_dir_path(output_directory);
+  if (output_dir_path.has_filename() && output_dir_path.extension() == "") {
+    return ORT_MAKE_STATUS(ONNXRUNTIME, INVALID_ARGUMENT, "output_dir is not a valid directory.");
+  }
+
+  std::filesystem::path ctx_model_path = output_directory / std::filesystem::path(model_name);
+
+  if (ctx_model_path.string().size() <= ConfigOptions::kMaxValueLength) {
+    ORT_RETURN_IF_ERROR(session_options_.value.config_options.AddConfigEntry(kOrtSessionOptionEpContextFilePath,
+                                                                             ctx_model_path.string().c_str()));
+  } else {
+    logging::LoggingManager* log_manager = env_.GetLoggingManager();
+    if (log_manager != nullptr && log_manager->HasDefaultLogger()) {
+      const logging::Logger& logger = log_manager->DefaultLogger();
+      LOGS(logger, WARNING) << "output_directory length with model_name length together exceeds limit of "
+                            << ConfigOptions::kMaxValueLength << " characters."
+                            << "ORT will still generate the expected output file, but EPs will see an empty "
+                            << "output path in SessionOption's ConfigOptions.";
+    }
+  }
+
+  return Status::OK();
+}
+
 Status ModelCompilationOptions::SetEpContextEmbedMode(bool embed_ep_context_in_model) {
   ORT_RETURN_IF_ERROR(session_options_.value.config_options.AddConfigEntry(
       kOrtSessionOptionEpContextEmbedMode, embed_ep_context_in_model ? "1" : "0"));
@@ -146,7 +176,7 @@ Status ModelCompilationOptions::ResetOutputModelSettings() {
   ep_context_gen_options.output_model_buffer_ptr = nullptr;
   ep_context_gen_options.output_model_buffer_size_ptr = nullptr;
   ep_context_gen_options.output_model_buffer_allocator = nullptr;
-  return session_options_.value.config_options.AddConfigEntry(kOrtSessionOptionEpContextFilePath, "");
+  return Status::OK();
 }
 
 Status ModelCompilationOptions::CheckInputModelSettings() const {

onnxruntime/core/session/model_compilation_options.h

@@ -72,6 +72,16 @@ class ModelCompilationOptions {
   Status SetOutputModelBuffer(onnxruntime::AllocatorPtr allocator, void** output_model_buffer_ptr,
                               size_t* output_model_buffer_size_ptr);
 
+  /// <summary>
+  /// Sets information relate to EP context binary file.
+  /// EP use this information to decide the location and context binary file name.
+  /// Used while compiling model with input and output in memory buffer
+  /// </summary>
+  /// <param name="output_directory">The folder path to the generated context binary file</param>
+  /// <param name="model_name">Model name used to decide the context binary file name: [model_name]_[ep].bin</param>
+  /// <returns>Status indicating potential error</returns>
+  Status SetEpContextBinaryInformation(const std::string& output_directory, const std::string& model_name);
+
   /// <summary>
   /// Enables or disables the embedding of EPContext binary data into the `ep_cache_context` attribute of EPContext
   /// nodes. Defaults to false (dumped to file).

onnxruntime/test/providers/qnn/qnn_ep_context_test.cc

@@ -509,6 +509,11 @@ TEST_F(QnnHTPBackendTests, CompileApi_FromSessionOptions_InputAndOutputModelsInB
     Ort::ModelCompilationOptions compile_options(*ort_env, session_options);
     compile_options.SetInputModelFromBuffer(reinterpret_cast<const void*>(model_data.data()), model_data.size());
     compile_options.SetOutputModelBuffer(allocator, &output_model_buffer, &output_model_buffer_size);
+    std::string target_dir = "./testdata/";
+    std::string model_name = "test_model_in_mem.onnx";
+    auto pos = model_name.rfind(".onnx");
+    std::string bin_file_name = model_name.substr(0, pos) + "_qnn.bin";
+    compile_options.SetEpContextBinaryInformation(ToWideString(target_dir).c_str(), ToWideString(model_name).c_str());
     compile_options.SetEpContextEmbedMode(false);
 
     // Compile the model.
@@ -519,12 +524,18 @@ TEST_F(QnnHTPBackendTests, CompileApi_FromSessionOptions_InputAndOutputModelsInB
     ASSERT_TRUE(output_model_buffer != nullptr);
     ASSERT_TRUE(output_model_buffer_size > 0);
 
+    ASSERT_TRUE(std::filesystem::exists(target_dir + bin_file_name)) << "expected context binary file should exist";
+
     // Check that the compiled model has the expected number of EPContext nodes.
     CheckEpContextNodeCounts(output_model_buffer, output_model_buffer_size, 2, 2);
 
+    // Add session option "ep.context_file_path" so that the session can use it to locate the [model_name]_qnn.bin file
+    std::string ctx_model = target_dir + model_name;
+    session_options.AddConfigEntry(kOrtSessionOptionEpContextFilePath, ctx_model.c_str());
     // Should be able to create a session with the compiled model and the original session options.
     EXPECT_NO_THROW((Ort::Session(*ort_env, output_model_buffer, output_model_buffer_size, session_options)));
 
+    std::filesystem::remove(target_dir + bin_file_name);
     allocator.Free(output_model_buffer);
   }
 }