Date: Fri, 5 Apr 2019 09:39:19 -0700 From: Enji Cooper <yaneurabeya@gmail.com> To: Michael Butler <imb@protected-networks.net> Cc: freebsd-current <freebsd-current@freebsd.org>, phil@freebsd.org Subject: Re: SVN r345859: libxo broke netstat? Message-ID: <8A6173F2-B6A5-48E6-9EC0-063698C0C511@gmail.com> In-Reply-To: <d2f35fae-b84a-d27f-c95d-b376cb68cef3@protected-networks.net> References: <d2f35fae-b84a-d27f-c95d-b376cb68cef3@protected-networks.net>
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> On Apr 5, 2019, at 5:19 AM, Michael Butler <imb@protected-networks.net> wrote: > > Something changed in libxo that causes 'netstat -i' to segfault as below: > > imb@toshi:/usr/src/usr.bin/netstat> lldb > /usr/obj/usr/src/amd64.amd64/usr.bin/netstat/netstat > (lldb) target create "/usr/obj/usr/src/amd64.amd64/usr.bin/netstat/netstat" > Current executable set to > '/usr/obj/usr/src/amd64.amd64/usr.bin/netstat/netstat' (x86_64). > (lldb) run -i > Process 65948 launching > Process 65948 launched: > '/usr/obj/usr/src/amd64.amd64/usr.bin/netstat/netstat' (x86_64) > Name Mtu Network Address Ipkts Ierrs Idrop > Opkts Oerrs Coll > Process 65948 stopped > * thread #1, name = 'netstat', stop reason = signal SIGSEGV: invalid > address (fault address: 0x0) > frame #0: 0x00000008002987ad > libxo.so.0`___lldb_unnamed_symbol30$$libxo.so.0 + 669 > libxo.so.0`___lldb_unnamed_symbol30$$libxo.so.0: > -> 0x8002987ad <+669>: movsbl (%r12), %eax > 0x8002987b2 <+674>: movslq %eax, %rbx > 0x8002987b5 <+677>: movq 0xac04(%rip), %r13 > 0x8002987bc <+684>: testl %eax, %eax > (lldb) bt > * thread #1, name = 'netstat', stop reason = signal SIGSEGV: invalid > address (fault address: 0x0) > * frame #0: 0x00000008002987ad > libxo.so.0`___lldb_unnamed_symbol30$$libxo.so.0 + 669 > frame #1: 0x0000000800294e09 > libxo.so.0`___lldb_unnamed_symbol24$$libxo.so.0 + 1401 > frame #2: 0x0000000800293b91 > libxo.so.0`___lldb_unnamed_symbol22$$libxo.so.0 + 609 > frame #3: 0x0000000800293df0 libxo.so.0`xo_emit + 256 > frame #4: 0x0000000000212dc5 netstat`intpr + 1669 > frame #5: 0x0000000000217ecf netstat`main + 2431 > frame #6: 0x000000000021210f netstat`__fini_array_end + 271 Michael, Could you please file a PR for this? Thank you! -Enji
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