Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: jackd2 (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1586200
Title:
aarch64 jackd2 fails on startup with Unhandled fault: alignment fault
(0x92000021)
Status in jackd2 package in Ubuntu:
Confirmed
Bug description:
jackd2 (1.9.10+20150825git1ed50c92~dfsg-1ubuntu1) fails to start on
the aarch64 architecture (Xenial) with an alignment error such as..
Unhandled fault: alignment fault (0x92000021) at 0x0000007fa519708e
Using...
lsb_release -rd
Description: Ubuntu 16.04 LTS
Release: 16.04
An upstream fix is available for aarch64 using the same method as for
arm and powerpc by working around packed structure issues...
https://github.com/jackaudio/jack2/commit/693451c36106542c5c5b5ba46d5d89aec783252e
The issue also impacts the aarch64 libjackd libraries (libjack-
jackd2-0), and any client package compiled against the bugged library
will have a broken shared memory structure for aarch64. Examples
include qjackctl, ardour, guitarix, etc.
Is it possible to request a new pull from upstream or have the patch
listed above applied to Ubuntu? Please let me know if this is not the
appropriate place to request this or if more information is needed.
Best Regards,
Brad.
PS. A debug of a crash...
JACK server starting in realtime mode with priority 10
self-connect-mode is "Don't restrict self connect requests"
[New Thread 0x7fb1f631e0 (LWP 8369)]
Thread 1 "jackd" received signal SIGBUS, Bus error.
0x0000007fb7f41cc4 in Jack::JackGraphManager::InitRefNum(int) () from
/usr/lib/aarch64-linux-gnu/libjackserver.so.0
(gdb) bt full
#0 0x0000007fb7f41cc4 in Jack::JackGraphManager::InitRefNum(int) () from
/usr/lib/aarch64-linux-gnu/libjackserver.so.0
No symbol table info available.
#1 0x0000007fb7f5f5cc in Jack::JackEngine::ClientInternalOpen(char const*,
int*, Jack::JackEngineControl**, Jack::JackGraphManager**,
Jack::JackClientInterface*, bool) ()
from /usr/lib/aarch64-linux-gnu/libjackserver.so.0
No symbol table info available.
#2 0x0000007fb7f5be68 in Jack::JackDriver::Open(unsigned int, unsigned int,
bool, bool, int, int, bool, char const*, char const*, unsigned int, unsigned
int) ()
from /usr/lib/aarch64-linux-gnu/libjackserver.so.0
No symbol table info available.
#3 0x0000007fb7b02608 in driver_initialize () from
/usr/lib/aarch64-linux-gnu/jack/jack_dummy.so
No symbol table info available.
#4 0x0000007fb7f6853c in JackDriverInfo::Open(jack_driver_desc_t*,
Jack::JackLockedEngine*, Jack::JackPosixSemaphore*, _JSList const*) () from
/usr/lib/aarch64-linux-gnu/libjackserver.so.0
No symbol table info available.
#5 0x0000007fb7f64d9c in Jack::JackServer::Open(jack_driver_desc_t*,
_JSList*) () from /usr/lib/aarch64-linux-gnu/libjackserver.so.0
No symbol table info available.
#6 0x0000007fb7f6be50 in jackctl_server_open () from
/usr/lib/aarch64-linux-gnu/libjackserver.so.0
No symbol table info available.
#7 0x0000000000402d8c in main (argc=3, argv=0x7fffffef08) at
../common/Jackdmp.cpp:545
server_ctl = 0x4298f0
server_parameters = 0x42a570
server_name = 0x4041e0 "default"
master_driver_ctl = 0x435a10
loopback_driver_ctl = 0x0
replace_registry = 0
options = 0x4041e8 "-d:X:I:P:uvshVrRL:STFl:t:mn:p:a:c:"
long_options = {{name = 0x404210 "clock-source", has_arg = 1, flag =
0x0, val = 99}, {name = 0x404220 "loopback-driver", has_arg = 1, flag = 0x0,
val = 76}, {name = 0x404230 "audio-driver",
has_arg = 1, flag = 0x0, val = 100}, {name = 0x404240
"midi-driver", has_arg = 1, flag = 0x0, val = 88}, {name = 0x404250
"internal-client", has_arg = 1, flag = 0x0, val = 73}, {
name = 0x404260 "verbose", has_arg = 0, flag = 0x0, val = 118},
{name = 0x404268 "help", has_arg = 0, flag = 0x0, val = 104}, {name = 0x404270
"port-max", has_arg = 1, flag = 0x0, val = 112}, {
name = 0x404280 "no-mlock", has_arg = 0, flag = 0x0, val = 109},
{name = 0x404290 "name", has_arg = 1, flag = 0x0, val = 110}, {name = 0x404298
"unlock", has_arg = 0, flag = 0x0, val = 117}, {
name = 0x4042a0 "realtime", has_arg = 0, flag = 0x0, val = 82},
{name = 0x4042b0 "no-realtime", has_arg = 0, flag = 0x0, val = 114}, {name =
0x4042c0 "replace-registry", has_arg = 0,
flag = 0x7fffffe968, val = 0}, {name = 0x4042d8 "loopback",
has_arg = 0, flag = 0x0, val = 76}, {name = 0x4042e8 "realtime-priority",
has_arg = 1, flag = 0x0, val = 80}, {name = 0x404300 "timeout",
has_arg = 1, flag = 0x0, val = 116}, {name = 0x404308
"temporary", has_arg = 0, flag = 0x0, val = 84}, {name = 0x404318 "version",
has_arg = 0, flag = 0x0, val = 86}, {name = 0x404320 "silent",
has_arg = 0, flag = 0x0, val = 115}, {name = 0x404328 "sync",
has_arg = 0, flag = 0x0, val = 83}, {name = 0x404330 "autoconnect", has_arg =
1, flag = 0x0, val = 97}, {name = 0x0, has_arg = 0,
flag = 0x0, val = 0}}
i = 1
opt = 100
option_index = 0
master_driver_name = 0x7ffffff2ae "dummy"
master_driver_args = 0x435020
master_driver_nargs = 1
loopback = 0
show_version = false
sigmask = 0x7fb7fb3020
param = 0x42b0b0
value = {ui = 0, i = 0, c = 0 '\000',
str =
"\000\000\000\000\000\000\000\000\220\001\000\270\177\000\000\000\300\353\377\377\177\000\000\000h\354\377\377\177\000\000\000\320\353\377\377\177\000\000\000\363\026\346\365\000\000\000\000\n\000\000\000\000\000\000\000\004",
'\000' <repeats 11 times>,
"\177\000\000\000\070q\377\267\177\000\000\000\300\353\377\377\177\000\000\000\b\353\377\377\177\000\000\000\004\353\377\377\177\000\000\000`\n@\000\000\000\000\000\320q\377\267\177\000\000\000\020i·\177\000\000",
b = false}
internals_list = {<std::__cxx11::_List_base<char*,
std::allocator<char*> >> = {
_M_impl = {<std::allocator<std::_List_node<char*> >> =
{<__gnu_cxx::new_allocator<std::_List_node<char*> >> = {<No data fields>}, <No
data fields>}, _M_node = {<std::__detail::_List_node_base> = {
_M_next = 0x7fffffea28, _M_prev = 0x7fffffea28}, _M_data =
0}}}, <No data fields>}
slaves_list = {<std::__cxx11::_List_base<char*, std::allocator<char*>
>> = {
_M_impl = {<std::allocator<std::_List_node<char*> >> =
{<__gnu_cxx::new_allocator<std::_List_node<char*> >> = {<No data fields>}, <No
data fields>}, _M_node = {<std::__detail::_List_node_base> = {
_M_next = 0x7fffffea40, _M_prev = 0x7fffffea40}, _M_data =
0}}}, <No data fields>}
it = <error reading variable it (Cannot access memory at address
0x10)>
return_value = -1
notify_sent = false
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