Tom Tromey b5eba2d8c0 Release the GIL while running a gdb command or expression ...

PR python/23615 points out that gdb.execute_gdb_command does not
release the Python GIL.  This means that, while the gdb command is
running, other Python threads do not run.

This patch solves the problem by introducing a new RAII class that can
be used to temporarily release and then re-acquire the GIL, then puts
this into the appropriate places in execute_gdb_command and
gdbpy_parse_and_eval.

This does not include a test case, because after some research I could
not find a way to write one that was not racy.

gdb/ChangeLog
2019-01-30  Tom Tromey  <tom@tromey.com>

	PR python/23615:
	* python/python.c (execute_gdb_command): Use gdbpy_allow_threads.
	(gdbpy_parse_and_eval): Likewise.
	* python/python-internal.h (gdbpy_allow_threads): New class.

2019-01-30 07:06:20 -07:00

..

lib/gdb

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py-all-events.def

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py-arch.c

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py-auto-load.c

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py-block.c

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py-bpevent.c

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py-breakpoint.c

Style improvements in gdb/python

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py-cmd.c

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py-continueevent.c

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py-event-types.def

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py-event.c

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py-event.h

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py-events.h

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py-evtregistry.c

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py-evts.c

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py-exitedevent.c

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py-finishbreakpoint.c

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py-frame.c

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py-framefilter.c

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py-function.c

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py-gdb-readline.c

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py-inferior.c

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py-infevents.c

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py-infthread.c

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py-instruction.c

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py-instruction.h

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py-lazy-string.c

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py-linetable.c

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py-newobjfileevent.c

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py-objfile.c

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py-param.c

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py-prettyprint.c

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py-progspace.c

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py-record-btrace.c

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py-record-btrace.h

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py-record-full.c

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py-record-full.h

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py-record.c

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py-record.h

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py-ref.h

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py-signalevent.c

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py-stopevent.c

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py-stopevent.h

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py-symbol.c

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py-symtab.c

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py-threadevent.c

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py-type.c

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py-unwind.c

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py-utils.c

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py-value.c

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py-varobj.c

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py-xmethods.c

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python-config.py

…

python-internal.h

Release the GIL while running a gdb command or expression

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python.c

Release the GIL while running a gdb command or expression

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python.h

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