Jan Kratochvil c75bd3a239 Fix crash on Python frame filters with unreadable arg ...

https://bugzilla.redhat.com/show_bug.cgi?id=1126177

ERROR: AddressSanitizer: SEGV on unknown address 0x000000000050 (pc 0x000000992bef sp 0x7ffff9039530 bp 0x7ffff9039540
T0)
    #0 0x992bee in value_type .../gdb/value.c:925
    #1 0x87c951 in py_print_single_arg python/py-framefilter.c:445
    #2 0x87cfae in enumerate_args python/py-framefilter.c:596
    #3 0x87e0b0 in py_print_args python/py-framefilter.c:968

It crashes because frame_arg::val is documented it may contain NULL
(frame_arg::error is then non-NULL) but the code does not handle it.

Another bug is that py_print_single_arg() calls goto out of its TRY_CATCH
which messes up GDB cleanup chain crashing GDB later.

It is probably 7.7 regression (I have not verified it) due to the introduction
of Python frame filters.

gdb/ChangeLog

	PR python/17355
	* python/py-framefilter.c (py_print_single_arg): Handle NULL FA->VAL.
	Fix goto out of TRY_CATCH.

gdb/testsuite/ChangeLog

	PR python/17355
	* gdb.python/amd64-py-framefilter-invalidarg.S: New file.
	* gdb.python/py-framefilter-invalidarg-gdb.py.in: New file.
	* gdb.python/py-framefilter-invalidarg.exp: New file.
	* gdb.python/py-framefilter-invalidarg.py: New file.

2014-09-07 14:09:59 +02:00

..

lib/gdb

PR 15276: Add $_caller_is, $_caller_matches, $_any_caller_is, $_any_caller_matches

2014-09-06 09:15:44 -07:00

py-arch.c

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py-auto-load.c

Include string.h in common-defs.h

2014-08-07 09:06:47 +01:00

py-block.c

constify struct block in some places

2014-06-18 08:16:52 -06:00

py-bpevent.c

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py-breakpoint.c

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py-cmd.c

PR python/16699: GDB Python command completion with overriden complete vs. completer class

2014-09-03 16:30:28 -04:00

py-continueevent.c

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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

Add support for reading frame registers to Python API.

2014-09-03 16:34:47 -07:00

py-framefilter.c

Fix crash on Python frame filters with unreadable arg

2014-09-07 14:09:59 +02:00

py-function.c

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py-gdb-readline.c

Include string.h in common-defs.h

2014-08-07 09:06:47 +01:00

py-inferior.c

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py-infthread.c

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py-lazy-string.c

Include gdb_assert.h in common-defs.h

2014-08-07 09:06:45 +01:00

py-linetable.c

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py-newobjfileevent.c

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py-objfile.c

Xmethod support in Python.

2014-06-03 10:03:07 -07:00

py-param.c

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py-prettyprint.c

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py-progspace.c

Xmethod support in Python.

2014-06-03 10:03:07 -07:00

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

constify some blockvector APIs

2014-06-18 08:16:59 -06:00

py-threadevent.c

Add new infrun.h header.

2014-05-22 12:29:11 +01:00

py-type.c

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py-utils.c

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py-value.c

Include gdb_assert.h in common-defs.h

2014-08-07 09:06:45 +01:00

py-varobj.c

Iterate over 'struct varobj_item' instead of PyObject

2014-06-12 15:27:19 +08:00

py-xmethods.c

Xmethod support in Python.

2014-06-03 10:03:07 -07:00

python-config.py

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python-internal.h

Move stdio.h to common-defs.h

2014-08-07 09:06:37 +01:00

python.c

Move libiberty.h to common-defs.h

2014-08-07 09:06:41 +01:00

python.h

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