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Make 'import gdb.events' work

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Pierre-Marie noticed that, while gdb.events is a Python module, it
can't be imported.  This patch changes how this module is created, so
that it can be imported, while also ensuring that the module is always
visible, just as it was in the past.

This new approach required one non-obvious change -- when running
gdb.base/warning.exp, where --data-directory is intentionally not
found, the event registries can now be nullptr.  Consequently, this
patch probably also requires

    https://sourceware.org/pipermail/gdb-patches/2022-June/189796.html

Note that this patch obsoletes

    https://sourceware.org/pipermail/gdb-patches/2022-June/189797.html
This commit is contained in:
Tom Tromey 2022-06-03 07:59:49 -06:00
parent 736918239b
commit 3acd9a692d
6 changed files with 37 additions and 22 deletions
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4
gdb/python/python-internal.h
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@ -521,8 +521,6 @@ int gdbpy_initialize_eventregistry (void)
CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_event (void)
CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_py_events (void)
CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_arch (void)
CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_registers ()
@ -543,6 +541,8 @@ void gdbpy_finalize_micommands ();
int gdbpy_initialize_disasm ()
CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
PyMODINIT_FUNC gdbpy_events_mod_func ();
/* A wrapper for PyErr_Fetch that handles reference counting for the
caller. */
class gdbpy_err_fetch