Some documentation updates. (#3060)

ThirdPartyNotices.txt

@@ -3821,3 +3821,29 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
+
+-----
+
+dcleblanc/SafeInt
+
+MIT License
+
+Copyright (c) 2018 Microsoft
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

docs/Coding_Conventions_and_Standards.md

@@ -27,9 +27,12 @@ Other
 * Don't overuse std::shared\_ptr. Use std::shared\_ptr only if it's not clear when and where the object will be deallocated. See also: [https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Rf-shared_ptr](https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Rf-shared_ptr)
 * Avoid using the 'long' type, which could be either 32 bits or 64 bits.
 * If there is a legitimate need to allocate objects on the heap, prefer using onnxruntime::make_unique(). References for the reasoning:
-   * https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#Rh-make_unique
-   * https://herbsutter.com/2013/05/29/gotw-89-solution-smart-pointers/
-   * https://abseil.io/tips/126
+  * https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#Rh-make_unique
+  * https://herbsutter.com/2013/05/29/gotw-89-solution-smart-pointers/
+  * https://abseil.io/tips/126
+* Use [SafeInt](https://github.com/dcleblanc/SafeInt) when calculating the size of memory to allocate to protect against overflow errors
+  * `#include "core/common/safeint.h"`
+  * search for `SafeInt<size_t>` in the code for examples
 
 #### Clang-format
 

include/onnxruntime/core/framework/allocator.h

@@ -153,6 +153,9 @@ using IAllocatorUniquePtr = std::unique_ptr<T, std::function<void(T*)>>;
 class IAllocator {
  public:
   virtual ~IAllocator() = default;
+  /**
+  @remarks Use SafeInt when calculating the size of memory to allocate using Alloc.
+  */
   virtual void* Alloc(size_t size) = 0;
   virtual void Free(void* p) = 0;
   virtual const OrtMemoryInfo& Info() const = 0;

include/onnxruntime/core/framework/op_kernel.h

@@ -133,8 +133,8 @@ class OpKernelContext {
   }
 
   /**
-   * return an allocator on device 0, with memtype of OrtMemTypeDefault
-   *
+   Return an allocator on device 0, with memtype of OrtMemTypeDefault.
+   @remarks Use SafeInt when calculating the size of memory to allocate using AllocatorPtr->Alloc.
    */
   Status GetTempSpaceAllocator(AllocatorPtr* output) const;