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Hi,
This is a log from a codesigned gdb 7.11.1 with debug logging enabled:
***
Starting program: textthr
[632 inferior]: inferior task: 0x300b, pid: 701
[632 inferior]: new_ix:0/1, old_ix:0/0, new_id:0x3203 old_id:0x0
[632 inferior]: darwin_wait: waiting for a message pid=701 thread=0
[701 inferior]: ptrace (PT_TRACE_ME, 0, 0x0, 0): 0 (no error)
[701 inferior]: ptrace (PT_SIGEXC, 0, 0x0, 0): 0 (no error)
message header:
bits: 0x1200
size: 0x24
remote-port: 0x0
local-port: 0xf87
reserved: 0x0
id: 0x48
data: 00000000 00000001 0000300b
[632 inferior]: darwin_wait: pid=701 exit, status=0x5
[632 inferior]: task=0x300b, prev=0x0, notify_port=0xf87
***
Thanks,
Jonas
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It seems that codesigning gdb with a self-signed, always-trust
certificate that is inside the "System" keychain is no longer sufficient
for it to be able ptrace child processes (i.e., following the steps at
https://sourceware.org/gdb/wiki/BuildingOnDarwin#Method_for_Mac_OS_X_10.5_.…
).
During startup program terminated with signal SIGTRAP, Trace/breakpoint
trap.
Are there new requirements in macOS 10.12 compared to previous OS X
releases, and if so what are they? Disabling SIP works around the issue,
but I'd rather not do that (nor recommend it to anyone else).