Escape analysis support for method redefinition

A computer usable program product for data replication, the computer program product comprising one or more computer readable storage media, and program instructions collectively stored on the one or more computer readable storage media, the program instructions executable by a processor to cause the processor to perform operations comprising:

• allocating, responsive to an instruction that creates an object in an object oriented program, memory in a stack frame for the object;
• detecting, during a runtime of the object oriented program, a hot code replacing of a portion of a function while the object is stored in the memory of the stack frame,
• wherein a thread of execution running the function holds the stack frame for the function including the object stored in the memory of the stack frame, and
• wherein the thread of execution runs the function at a first performance level while the object is stored in the memory of the stack frame;
• allocating, responsive to the detecting of the hot code replacing of the portion of the function, memory in a heap memory of the object oriented program;
• moving the object from the memory in the stack frame to the allocated memory in the heap memory of the object oriented program;
• and
• updating a reference to the object pointing to the stack frame to instead point to the allocated memory in the heap memory,
• wherein the thread of execution runs the function at a second performance level lower than the first performance level while the object is stored in the heap memory.

A computer system comprising a processor and one or more computer readable storage media, and program instructions collectively stored on the one or more computer readable storage media, the program instructions executable by the processor to cause the processor to perform operations comprising:

• allocating, responsive to an instruction that creates an object in an object oriented program, memory in a stack frame for the object;
• detecting, during a runtime of the object oriented program, a hot code replacing of a portion of a function while the object is stored in the memory of the stack frame,
• wherein a thread of execution running the function holds the stack frame for the function including the object stored in the memory of the stack frame, and
• wherein the thread of execution runs the function at a first performance level while the object is stored in the memory of the stack frame;
• allocating, responsive to the detecting of the hot code replacing of the portion of the function, memory in a heap memory of the object oriented program;
• moving the object from the memory in the stack frame to the allocated memory in the heap memory of the object oriented program;
• and
• updating a reference to the object pointing to the stack frame to instead point to the allocated memory in the heap memory,
• wherein the thread of execution runs the function at a second performance level lower than the first performance level while the object is stored in the heap memory.