Inactivating basic blocks of program code to prevent code reuse attacks

An information handling system comprising:

• one or more processors;
• a memory coupled to at least one of the processors;
• a set of computer program instructions stored in the memory and executed by at least one of the processors in order to perform actions comprising:
• receiving a request to execute a computer program;
• determining an active set of metadata that corresponds to the requested computer program;
• loading one or more basic blocks of the requested computer program in the memory, wherein one of the loaded basic blocks is a starting block of the requested computer program, and wherein the memory also includes one or more basic blocks corresponding to one or more previously loaded computer programs;
• inactivating one or more basic blocks that are stored in the memory, wherein the inactivated basic blocks are identified based on comparing the active set of metadata to sets of metadata corresponding to the basic blocks of the previously loaded computer programs;
• and
• executing the starting block of the requested computer program.

A computer program product comprising:

• a computer readable storage medium, comprising computer program code that, when executed by an information handling system, executes instructions that perform actions comprising:
• receiving a request to execute a computer program;
• determining an active set of metadata that corresponds to the requested computer program;
• loading one or more basic blocks of the requested computer program in the memory, wherein one of the loaded basic blocks is a starting block of the requested computer program, and wherein the memory also includes one or more basic blocks corresponding to one or more previously loaded computer programs;
• inactivating one or more basic blocks that are stored in the memory, wherein the inactivated basic blocks are identified based on comparing the active set of metadata to sets of metadata corresponding to the basic blocks of the previously loaded computer programs;
• and
• executing the starting block of the requested computer program.