This commit contains changes that are required to generate a global variable which will be used to store an array of addresses of other global variables in the program. The location of the globals within this array should be stable after a recompilation to support online change, so we support loading a pre-existing layout to ensure that for all globals that we see in both the current program and the pre-existing layout, their positions remain the same. Otherwise, any new globals will be placed in any empty spaces left by old globals, or appended on to the end of the array. The layout will then be saved back the the file used for saving and loading.
Currently, to use this feature the flag --got-layout-file=<file> must be provided, which should specify the name of either a TOML or JSON file to use to save, and optionally load if the file already exists, the GOT layout. In future we will integrate this with a generic online change flag, whereby it will not be necessary to ask for a GOT layout file when we already know that we need it for online change.
This commit contains changes that are required to generate a global variable which will be used to store an array of addresses of other global variables in the program. The location of the globals within this array should be stable after a recompilation to support online change, so we support loading a pre-existing layout to ensure that for all globals that we see in both the current program and the pre-existing layout, their positions remain the same. Otherwise, any new globals will be placed in any empty spaces left by old globals, or appended on to the end of the array. The layout will then be saved back the the file used for saving and loading.
Currently, to use this feature the flag
--got-layout-file=<file>must be provided, which should specify the name of either a TOML or JSON file to use to save, and optionally load if the file already exists, the GOT layout. In future we will integrate this with a generic online change flag, whereby it will not be necessary to ask for a GOT layout file when we already know that we need it for online change.