1. A method in a data processing system for inlining native functions into compiled Java code, the method comprising: detecting a native function call at a Java callsite, wherein the native function call is invoked using a Java Native Interface, and is recursively inlined such that any native calls an inlined native function contains may also be subsequently inlined; converting an intermediate representation of a native function to a just-in-time compiler intermediate representation, wherein the just-in-time compiler intermediate representation is subsequently treated as Java Bytecodes, while maintaining adherence to semantics of original source language of the native function, by a just-in-time compiler after the converting step, wherein converting an intermediate representation further comprises; iterating through the intermediate representation of the native function; and generating a just-in-time compiler intermediate representation for each instruction in the intermediate representation of the native function, wherein the intermediate representation of the native function is retrieved from a native library containing native binary code and the intermediate representation of the native function; inlining the just-in-time compiler intermediate representation into the Java callsite, wherein the inlining the just-in-time compiler further comprises: making a determination as to whether the native function call is to an opaque function, wherein the call to the opaque function invokes procedures for which a just-in-time compiler cannot render an intermediate representation; responsive to an absence of a determination that the native function call is to an opaque function, replacing the native function call with an actual implementation of the native function call using the just-in-time compiler intermediate representation and materializing a native interface environment pointer and making the pointer available to the actual implementation of the native function call; responsive to the determination that the native function call is to an opaque function, determining whether the native function call represents a call from Java to a native function, wherein determining whether the native function call represents a call from Java to a native function further comprises: responsive to the native function call not representing a call from Java to a native function, synthesizing a Java callable native function, and replacing the native function call with a call to the synthesized native function, wherein the synthesized native function provides access to the native library containing an implementation of the opaque function; and responsive to the native function call representing a call from Java to a native function, determining whether the native function call is an original function call that started an entire inlining process, wherein determining whether the native function call is an original function call that started an entire inlining process further comprises: responsive to the native function call being the original function call that started the entire inlining process, resuming just-in-time compiler processing; and responsive to the native function call not being an original function call that started the entire inlining process, converting the intermediate representation of the native function call to a just-in-time compiler intermediate representation; recursively inlining the just-in-time compiler intermediate representation into the Java callsite until determining either that a just-in-time compiler growth limit is reached, wherein the just-in-time compiler growth limit indicates how many native functions may be inlined in order to limit negative side-effects on an instruction cache, that the native function call is to an opaque function, or that no additional native function call is present in a native function implementation; inserting code in the compiled Java code to provide interaction between the actual implementation of the native function call and virtual machine components; and inserting code to the compiled Java code to provide linkage to shared memory for data shared by inlined native functions, synthesized native functions and other functions in the native library.