rr 5.2 assertion on replay

Wade Hennessey wadehennessey at gmail.com
Fri Jun 1 18:46:28 UTC 2018


I'm trying to replay a program with using rr 5..2 and I got the following
assertion:

0x00007f4e54d55c30 in _start () from /lib64/ld-linux-x86-64.so.2
(rr) cont
Continuing.
Installing openjdk unwinder
[New Thread 478.479]
NDEBUG is defined
[FATAL /home/roc/rr/rr/src/ReplaySession.cc:1023:check_ticks_consistency()]
 (task 928 (rec:480) at time 6265)
 -> Assertion `ticks_now == trace_ticks' failed to hold. ticks mismatch for
'SYSCALL: nanosleep'; expected 1118762, got 1117862
=== Start rr backtrace:
rr(_ZN2rr13dump_rr_stackEv+0x28)[0x55faa8]
rr(_ZN2rr9GdbServer15emergency_debugEPNS_4TaskE+0x385)[0x49c9e5]
rr(_ZN2rr21EmergencyDebugOstreamD2Ev+0xd6)[0x4a8656]
rr(_ZN2rr13ReplaySession23check_ticks_consistencyEPNS_10ReplayTaskERKNS_5EventE+0x16d)[0x50c0dd]
rr(_ZN2rr13ReplaySession11replay_stepERKNS0_15StepConstraintsE+0x30b)[0x511c3b]
rr(_ZN2rr14ReplayTimeline19replay_step_forwardENS_10RunCommandEl+0xc3)[0x527543]
rr(_ZN2rr9GdbServer14debug_one_stepERNS_10GdbRequestE+0xe20)[0x49b100]
rr(_ZN2rr9GdbServer12serve_replayERKNS0_15ConnectionFlagsE+0x4c0)[0x49c2c0]
rr[0x50750e]
rr(_ZN2rr13ReplayCommand3runERSt6vectorISsSaISsEE+0x7cb)[0x508d3b]
rr(main+0x244)[0x452504]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f0618895830]
rr[0x4529ef]
=== End rr backtrace
Launch gdb with
  gdb '-l' '10000' '-ex' 'set sysroot /' '-ex' 'target extended-remote
127.0.0.1:1025'
/home/local/ANT/wadehenn/.local/share/rr/java-0/mmap_hardlink_3_java

Is there anything I can do to avoid this or more information I can provide
that might help? -wade
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