osx - Need help getting gdb to run on OS/X El Capitan (code signing does not work) -

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i trying gdb (installed via homebrew) run on os/x el capitan. have gone through multiple posts online code signing, creating certificate, etc., still not work.

(see example: how "codesigned" gdb on osx? )

my code signed evidenced by:

codesign -vvd /usr/local/bin/gdb executable=/usr/local/cellar/gdb/7.11/bin/gdb identifier=org.gnu.gdb format=mach-o thin (x86_64) codedirectory v=20100 size=44540 flags=0x0(none) hashes=1388+2 location=embedded signature size=1772 authority=gdb-cert signed time=jul 4, 2016, 7:37:55 info.plist entries=4 teamidentifier=not set sealed resources=none internal requirements count=1 size=88

and 

codesign -vvd /usr/local/cellar/gdb/7.11/bin/gdb  executable=/usr/local/cellar/gdb/7.11/bin/gdb identifier=org.gnu.gdb format=mach-o thin (x86_64) codedirectory v=20100 size=44540 flags=0x0(none) hashes=1388+2 location=embedded signature size=1772 authority=gdb-cert signed time=jul 4, 2016, 7:37:55 info.plist entries=4 teamidentifier=not set sealed resources=none internal requirements count=1 size=88

and user member of both _developer , procmod read might important.

but no avail. when try debug program still error:

gdb a.out gnu gdb (gdb) 7.11 copyright (c) 2016 free software foundation, inc. license gplv3+: gnu gpl version 3 or later <http://gnu.org/licenses/gpl.html> ... reading symbols a.out...(no debugging symbols found)...done. (gdb) run starting program: a.out  unable find mach task port process-id 658: (os/kern) failure (0x5).  (please check gdb codesigned - see taskgated(8)) (gdb)

i tried sudo spctl --master-disable turn off check signed coded altogether , still same error.

however, if run root works.

i able run gdb normal user. have idea going on?


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