Analysis function for suppressing stop of execution due to an exception

An analysis function providing device comprising:

• a memory;
• and
• a processor coupled to the memory and configured to perform operations comprising:
• acquiring a hook point of a script engine and a virtual program counter by analyzing a virtual machine of the script engine, wherein:
• the acquired hook point is a part where an analysis code is inserted by applying a hook;
• and
• the acquired virtual program counter is a variable indicating an instruction of the virtual machine of the script engine to be executed next;
• acquiring a branch virtual machine instruction by analyzing an instruction set architecture, wherein:
• the instruction set architecture is a system of instructions of the virtual machine of the script engine;
• and
• the acquired branch virtual machine instruction is a virtual machine instruction that causes a branch;
• and
• providing an analysis function to the script engine based on the acquired virtual program counter and the acquired branch virtual machine instruction, wherein the analysis function is executed in the script engine by applying the hook to the acquired hook point of the script engine, and wherein the hook includes processing of, in response to an occurrence of an exception, changing a pointing destination of a virtual stack pointer in a memory to a return destination of a function before a part where the exception has occurred.

A non-transitory computer readable storage medium having an analysis function providing program stored thereon that, when executed by a processor, causes the processor to perform operations comprising:

• acquiring a hook point of a script engine and a virtual program counter by analyzing a virtual machine of the script engine, wherein:
• the acquired hook point is a part where an analysis code is inserted by applying a hook;
• and
• the acquired virtual program counter is a variable indicating an instruction of the virtual machine of the script engine to be executed next;
• acquiring a branch virtual machine instruction by analyzing an instruction set architecture, wherein:
• the instruction set architecture is a system of instructions of the virtual machine of the script engine;
• and
• the acquired branch virtual machine instruction is a virtual machine instruction that causes a branch;
• and
• providing an analysis function to the script engine based on the acquired virtual program counter and the acquired branch virtual machine instruction, wherein the analysis function is executed in the script engine by applying the hook to the acquired hook point of the script engine, and wherein the hook includes processing of, in response to an occurrence of an exception, changing a pointing destination of a virtual stack pointer in a memory to a return destination of a function before a part where the exception has occurred.