1. A method comprising: receiving a compiled application of original executable computer code; modifying by a processor the compiled application to inject a new load command to load supplemental computer code with respect to the original executable computer code in the compiled application, the modified compiled application configured to execute the supplemental computer code with respect to the original executable computer code upon instantiation, the supplemental computer code coded to fetch, execute, and evaluate a policy of at least one rule in view of one or more particular types of data to be used to execute the at least one rule to control usage of functionality supported by the original executable computer code based on the at least one rule in the policy, wherein a mapping information is used to fetch the policy; and providing access to the modified compiled application for installation of the modified compiled application on at least one host computer; wherein the modifying includes: verifying that the compiled application includes padding space of unused bits in which to insert the new load command, the padding space disposed between respective existing load commands in the received compiled application and subsequent data sections in the received compiled application; inserting the new load command into the padding space, the new load command pointing to the supplemental computer code to be injected into the original executable computer code upon the instantiation of the modified compiled application; modifying a header in the received compiled application, the header defining attributes of the compiled application, the header modified to indicate a change to a number of load commands to be executed upon the instantiation of the modified compiled application, the change indicating to execute the respective existing load commands in the received compiled application and the new load command inserted into the padding space; receiving the supplemental computer code; and adding the supplemental computer code to the original executable computer code.