From The Linux Foundation

int_insert

Activation time: before INSERT ON Interface

Sets Itestable field to 'No' for the following categories of interfaces:

• Not-functions
• Private methods of classes
• Thunks

Also sets Idocumented to 'Yes' and Isrcbin to 'BinOnly' for vtables, typeinfos, typeinfo names and guard variables.

int_update

Activation time: before UPDATE ON Interface

Sets Itestable field to 'No' for the following categories of interfaces:

• Not-functions
• Private methods of classes
• Thunks

int_ilibrary_on_lgint_insert

Activation time: after INSERT ON LGInt

Sets Ilibrary field.

int_ilibrary_on_lgint_update

Activation time: after UPDATE ON LGInt

Sets Ilibrary field.

int_after_insert

Activation time: after INSERT ON Interface

If vtable, typeinfo, typeinfo name or guard variable symbol was added, replaces appropriate record in the IntStd table referencing Itanium C++ ABI.