Portability of checkpoints of an application using central processing unit (CPU)-specific functions

A method for improving portability of checkpoints of an application, the method comprising:

• receiving, by a computing system, a request to resolve a function during a first execution of the function, wherein the function is associated with a plurality of implementations;
• determining based on a query of a central processing unit (CPU) associated with the computing system, a set of source CPU-specific features associated with the computing system;
• selecting, based on the set of source CPU-specific features, a source-specific implementation of the plurality of implementations for the first execution of the function;
• patching a callsite associated with the function with an address of the source-specific implementation;
• and
• causing, based on a set of destination CPU-specific features associated with a destination computing system, a re-resolution of the function during a restoration of a checkpoint of the application on the destination computing system.

A system for improving portability of checkpoints of an application, the system comprising:

• a source computing system comprising:
• a source memory, and
• a source processor;
• wherein the source memory stores instructions that, when executed by the source processor, causes the source computing system to:
• cause a first execution of an application, wherein the application includes a function associated with a plurality of implementations;
• receive a request to resolve an implementation decision for the function during the first execution, wherein resolving the implementation decision comprises selecting an implementation among the plurality of implementations;
• determine, based on a query of a central processing unit (CPU) associated with the source computing system, a set of source CPU-specific features associated with the source computing system;
• select, based on the set of source CPU-specific features, a source-specific implementation of the plurality of implementations for the first execution of the function;
• patch, by rendering a resolved callsite table, a call site associated with the function with an address of the source-specific implementation;
• send, to a destination computing system, a checkpoint of the application, wherein the checkpoint includes the resolved callsite table;
• and
• cause, during a restoration of the application, based on a set of destination CPU-specific features associated with the destination computing system, the destination computing system to change the implementation decision.