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gdb/python: add gdb.history_count function

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Add a new function gdb.history_count to the Python api, this function
returns an integer, the number of items in GDB's value history.

This is useful if you want to pull items from the history by their
absolute number, for example, if you wanted to show a complete history
list.  Previously we could figure out how many items are in the
history list by trying to fetch the items, and then catching the
exception when the item is not available, but having this function
seems nicer.
This commit is contained in:
Andrew Burgess 2022-01-24 15:19:43 +00:00
parent 51d185a65f
commit 30a87e90be
8 changed files with 43 additions and 0 deletions
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gdb/python/python.c
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@ -2212,6 +2212,8 @@ PyMethodDef python_GdbMethods[] =
"Get a value from history" },
{ "add_history", gdbpy_add_history, METH_VARARGS,
"Add a value to the value history list" },
{ "history_count", gdbpy_history_count, METH_NOARGS,
"Return an integer, the number of values in GDB's value history" },
{ "execute", (PyCFunction) execute_gdb_command, METH_VARARGS | METH_KEYWORDS,
"execute (command [, from_tty] [, to_string]) -> [String]\n\
Evaluate command, a string, as a gdb CLI command. Optionally returns\n\