The support of dynamically of standardized languages in typical assembler languages production department

摘要

In accordance with one embodiment of the present invention, a technique for supporting dynamically typed languages in typed assembly languages is provided. According to one embodiment, a new bytecode instruction, “invokedynamic,” supplements “invokevirtual.” Prior to the execution of a typed assembly language program, it is determined whether a particular method-invoking instruction is a particular kind of instruction. If the instruction is of the particular kind, then the verifier refrains from performing the usual pre-execution type checking of the arguments that will be on the operand stack when the instruction is executed. Consequently, the bytecode instruction may be used to represent the invocation of a method that might not indicate formal parameter types. Because the verifier performs less stringent type checking in response to such an instruction, the JVM can execute assembly language programs that were generated based on source code that was written in a dynamically typed language.