Convert multipy embedded library exceptions to specific exception type (

#313)

Summary:
Pull Request resolved: #313

Convert multipy embedded library exceptions to specific exception type

Reviewed By: PaliC

Differential Revision: D44477860

fbshipit-source-id: 9cb3d1f17f54a61a79ed9766bcd9377d76a1aea8

multipy/runtime/Exception.h

@@ -4,10 +4,13 @@
 // This source code is licensed under the BSD-style license found in the
 // LICENSE file in the root directory of this source tree.
 
+#pragma once
+
 #ifndef MULTIPY_EXCEPTION_H
 #define MULTIPY_EXCEPTION_H
 
 #include <exception>
+#include <stdexcept>
 
 #define MULTIPY_INTERNAL_ASSERT_WITH_MESSAGE(condition, message)               \
   if (!(condition)) {                                                          \
@@ -51,3 +54,13 @@
       MULTIPY_CHECK_NO_MESSAGE(__VA_ARGS__));
 
 #endif // MULTIPY_EXCEPTION_H
+
+namespace torch {
+namespace deploy {
+class MultipyEmbeddedException : public std::runtime_error {
+ public:
+  explicit MultipyEmbeddedException(const std::string& error)
+      : std::runtime_error(error) {}
+};
+} // namespace deploy
+} // namespace torch

multipy/runtime/interpreter/interpreter_impl.cpp

@@ -92,17 +92,17 @@ class MultiPySafeRethrow {
         auto code = err.value().attr("code").cast<int>();
         std::exit(code);
       }
-      throw std::runtime_error(
+      throw torch::deploy::MultipyEmbeddedException(
           std::string(file_) + ":" + std::to_string(line_) +
           ": Exception Caught inside torch::deploy embedded library: \n" +
           err.what());
     } catch (std::exception& err) {
-      throw std::runtime_error(
+      throw torch::deploy::MultipyEmbeddedException(
           std::string(file_) + ":" + std::to_string(line_) +
           ": Exception Caught inside torch::deploy embedded library: \n" +
           err.what());
     } catch (...) {
-      throw std::runtime_error(
+      throw torch::deploy::MultipyEmbeddedException(
           std::string(file_) + ":" + std::to_string(line_) +
           ": Unknown Exception Caught inside torch::deploy embedded library");
     }