Initializing a data structure for use in predicting table of contents pointer values
Initializing a data structure for use in predicting table of contents (TOC) pointer values. A request to load a module is obtained. Based on the loaded module, a pointer value for a reference data structure is determined. The pointer value is stored in a reference data structure tracking structure, and used to access a variable value for a variable of the module.
1. A computer-implemented method of facilitating processing within a computing environment, the computer-implemented method comprising:
obtaining, by a processor, a request to load a module;
determining, based on the module loaded, a pointer value for a reference data structure;
storing the pointer value in a reference data structure tracking structure, wherein the reference data structure tracking structure is a reference data structure pointer cache, and wherein the reference data structure pointer cache comprises an address field to include an address for which the pointer value is being set and a pointer value field to include the pointer value, the address field including the address of the module; and
using the pointer value to access a variable value for a variable of the module.
2. The computer-implemented method of claim 1 , wherein the reference data structure pointer cache further includes another field to indicate one or more functions that do not initialize a pointer value register.
3. The computer-implemented method of claim 1 , wherein the reference data structure pointer cache further includes a usage tracking field to be used in selecting an entry from the reference data structure pointer cache to be replaced.
4. The computer-implemented method of claim 1 , wherein the reference data structure pointer cache comprises a plurality of address fields to specify a range of addresses for which the pointer value is associated.
5. The computer-implemented method of claim 1 , wherein the reference data structure tracking structure is an in-memory table.
6. The computer-implemented method of claim 1 , wherein the determining the pointer value comprises determining the pointer value from a relative offset of the module.