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Some Java DaCapo benchmarks fail with unhandled SIGSEGVs in hw mode #645

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prp opened this issue Jul 19, 2020 · 3 comments · May be fixed by #646
Closed

Some Java DaCapo benchmarks fail with unhandled SIGSEGVs in hw mode #645

prp opened this issue Jul 19, 2020 · 3 comments · May be fixed by #646
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area: sgx-lkl Core SGX-LKL functionality bug p1 Medium priority
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@prp
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prp commented Jul 19, 2020 •
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When running the Java DaCapo benchmarks, some of them fail with unhandled SIGSEGVs as follows:

$ SGXLKL_VERBOSE=1 SGXLKL_KERNEL_VERBOSE=1 SGXLKL_MMAP_FILES=Shared SGXLKL_TRACE_SIGNAL=1 sgx-lkl-run-oe --hw-debug --enclave-config=enclave_config-java-dacapo.json java-dacapo.img 
[   SGX-LKL  ] nproc=8 ETHREADS=8 CMDLINE="mem=32M"
[   SGX-LKL  ] HW TLS support: econf->fsgsbase=1
[   SGX-LKL  ] Registering disk 0 (path='java-dacapo.img', mnt='/', [RW])
[   SGX-LKL  ] No tap device specified, networking will not be available.
[   SGX-LKL  ] get_signed_libsgxlkl_path... result=/opt/sgx-lkl/bin/../lib/libsgxlkl.so.signed
[   SGX-LKL  ] oe_create_enclave...
[   SGX-LKL  ] Enclave config: {"args":["/usr/bin/java","-Xms2000k","-XX:InitialCodeCacheSize=2000k","-XX:ReservedCodeCacheSize=4000K","-XX:CompressedClassSpaceSize=4000K","-XX:+UseCompressedClassPointers","-XX:+PerfDisableSharedMem","-XX:+UseMembar","-Dsun.zip.disableMemoryMapping=true","-verbose:gc","-jar","/dacapo/dacapo-9.12-MR1-bach.jar","pmd"],"clock_res":[{"resolution":"0000000000000001"},{"resolution":"0000000000000001"},{"resolution":"0000000000000000"},{"resolution":"0000000000000000"},{"resolution":"0000000000000001"},{"resolution":"00000000003d0900"},{"resolution":"00000000003d0900"},{"resolution":"0000000000000001"}],"cwd":"/","env":["LD_LIBRARY_PATH=/usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/server:/usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64:/usr/lib/jvm/java-1.8-openjdk/jre/../lib/amd64:/usr/lib/jvm/java-1.8-openjdk/lib/amd64/jli"],"esleep":"16000","espins":"500","ethreads":"8","exit_status":"full","format_version":"1","fsgsbase":true,"host_import_env":[],"hostname":"lkl","hostnet":false,"image_sizes":{"num_heap_pages":"2097152","num_stack_pages":"1024"},"io":{"block":true,"console":true,"network":true},"kernel_cmd":"mem=32M","kernel_verbose":true,"max_user_threads":"256","mmap_files":"shared","mode":"hw_debug","mounts":[],"net_gw4":"10.0.1.254","net_ip4":"10.0.1.1","net_mask4":"24","oe_heap_pagecount":"8192","root":{"key":"","key_id":null,"overlay":false,"readonly":false,"roothash":null,"roothash_offset":"0"},"stacksize":"524288","swiotlb":true,"sysctl":null,"tap_mtu":"0","verbose":true,"wg":{"ip":"10.0.2.1","key":null,"listen_port":"56002","peers":[]}}
result=0 (OE_OK)
[   SGX-LKL  ] sgxlkl_enclave_init(ethread_id=0)
[[  SGX-LKL ]] sgxlkl_enclave_init(): enter
[[  SGX-LKL ]] _sgxlkl_enclave_show_attribute(): enclave base=0x7f3000000000 size=64.0 GiB
[[  SGX-LKL ]] _sgxlkl_enclave_show_attribute(): enclave heap base=0x7f3000b47000 size=8.0 GiB end=0x7f3200b47000
[[  SGX-LKL ]] sgxlkl_enclave_init(): calling _dlstart_c()
[[  SGX-LKL ]] _register_enclave_signal_handlers(): Registering OE exception handler...
[[  SGX-LKL ]] __libc_init_enclave(): calling enclave_mman_init()
[[  SGX-LKL ]] __libc_init_enclave(): calling _lthread_sched_init()
[[  SGX-LKL ]] lkl_start_init(): calling register_lkl_syscall_overrides()
[[  SGX-LKL ]] lkl_start_init(): calling initialize_enclave_event_channel()
[[  SGX-LKL ]] lkl_start_init(): kernel command line: 'mem=32M console=hvc0'
[[  SGX-LKL ]] lkl_start_init(): Disk 0: Disk encryption: no
[[  SGX-LKL ]] lkl_start_init(): Disk 0: Disk is writable: yes
[[  SGX-LKL ]] lkl_start_init(): lkl_start_kernel() called
[    0.000000] Linux version 5.3.0+ (prp@dc-peter-dev) (gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)) #4 Sun Jul 19 14:34:37 UTC 2020
[    0.000000] memblock address range: 0x7f31fe8c6000 - 0x7f32008c6000
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 8080
[    0.000000] Kernel command line: mem=32M console=hvc0 virtio_mmio.device=256@0x1000000:1
[    0.000000] Dentry cache hash table entries: 4096 (order: 3, 32768 bytes, linear)
[    0.000000] Inode-cache hash table entries: 2048 (order: 2, 16384 bytes, linear)
[    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[    0.000000] Memory available: 32176k/32768k RAM
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] NR_IRQS: 4096
[    0.000000] lkl: irqs initialized
[    0.000000] clocksource: lkl: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[    0.000000] lkl: time and timers initialized (irq2)
[    0.000557] printk: console [hvc0] enabled
[    0.000557] pid_max: default: 4096 minimum: 301
[    0.000557] Mount-cache hash table entries: 512 (order: 0, 4096 bytes, linear)
[    0.000558] Mountpoint-cache hash table entries: 512 (order: 0, 4096 bytes, linear)
[    0.002761] devtmpfs: initialized
[    0.005442] random: get_random_bytes called from 0x00007f300066284b with crng_init=0
[    0.005444] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.005444] futex hash table entries: 16 (order: -4, 384 bytes, linear)
[    0.005445] xor: automatically using best checksumming function   8regs
[    0.005999] NET: Registered protocol family 16
[    0.011042] clocksource: Switched to clocksource lkl
[    0.011575] NET: Registered protocol family 2
[    0.012135] tcp_listen_portaddr_hash hash table entries: 256 (order: 0, 4096 bytes, linear)
[    0.012136] TCP established hash table entries: 512 (order: 0, 4096 bytes, linear)
[    0.012137] TCP bind hash table entries: 512 (order: 0, 4096 bytes, linear)
[    0.012685] TCP: Hash tables configured (established 512 bind 512)
[    0.012686] UDP hash table entries: 128 (order: 0, 4096 bytes, linear)
[    0.012686] UDP-Lite hash table entries: 128 (order: 0, 4096 bytes, linear)
[    0.012687] NET: Registered protocol family 1
[    0.012687] virtio-mmio: Registering device virtio-mmio.0 at 0x1000000-0x10000ff, IRQ 1.
[    0.013241] workingset: timestamp_bits=62 max_order=14 bucket_order=0
[    0.014333] NET: Registered protocol family 38
[    0.014333] io scheduler mq-deadline registered
[    0.014888] io scheduler kyber registered
[    0.094890] software IO TLB: mapped [mem 0x7f415d7ba000-0x7f41617ba000] (64MB)
[    0.096917] loop: module loaded
[    0.097422] device-mapper: ioctl: 4.40.0-ioctl (2019-01-18) initialised: [email protected]
[    0.097927] wireguard: WireGuard 0.0.20191219 loaded. See www.wireguard.com for information.
[    0.098482] wireguard: Copyright (C) 2015-2019 Jason A. Donenfeld <[email protected]>. All Rights Reserved.
[    0.098484] NET: Registered protocol family 10
[    0.099594] Segment Routing with IPv6
[    0.099594] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[    0.101340] This architecture does not have kernel memory protection.
[    0.102511] Run /init as init process
[[  SGX-LKL ]] lkl_start_init(): lkl_start_kernel() finished
[[  SGX-LKL ]] lkl_start_init(): creating LKL termination thread
[[  SGX-LKL ]] create_lkl_termination_thread(): enter
[[  SGX-LKL ]] lkl_start_init(): calling lkl_mount_virtual()
[[  SGX-LKL ]] lkl_termination_thread(): enter
[[  SGX-LKL ]] lkl_start_init(): calling init_random()
[[  SGX-LKL ]] init_random(): Adding entropy to entropy pool
[[  SGX-LKL ]] lkl_termination_thread(): Performed LKL syscall to get host task allocated (pid=36)
[    0.104191] random: crng init done
[[  SGX-LKL ]] init_enclave_clock(): Setting enclave realtime clock
[[  SGX-LKL ]] wg0 has public key +LaycJKfiHfGfSX5HagcZpomYOTX1pcX6Ilzv9DPdw8=
[    0.108634] virtio_blk virtio1: [vda] 1024000 512-byte logical blocks (524 MB/500 MiB)
[[  SGX-LKL ]] lkl_mount_disk(): lkl_mount_disk(dev="/dev/vda", mnt="/mnt/vda", ro=0)
[    0.110864] EXT4-fs (vda): mounted filesystem without journal. Opts:
[[  SGX-LKL ]] lkl_mount_disks(): Set working directory: /
[[  SGX-LKL ]] libc_start_main_stage2(): Calling app main: /usr/bin/java
OpenJDK 64-Bit Server VM warning: Can't detect primordial thread stack location - find_vma failed
[GC (Allocation Failure)  512K->496K(1536K), 0.0044627 secs]
[GC (Allocation Failure)  1008K->550K(1536K), 0.0037532 secs]
[GC (Allocation Failure)  1059K->618K(1536K), 0.0011175 secs]
[GC (Allocation Failure)  1130K->813K(2048K), 0.0016743 secs]
[GC (Allocation Failure)  1837K->927K(2048K), 0.0137295 secs]
[Full GC (Ergonomics)  927K->571K(3072K), 0.0116470 secs]
[GC (Allocation Failure)  1595K->854K(4608K), 0.0022363 secs]
[GC (Allocation Failure)  2902K->900K(4608K), 0.0108369 secs]
[GC (Allocation Failure)  2943K->902K(6656K), 0.0015773 secs]
[GC (Allocation Failure)  4998K->982K(6656K), 0.0100926 secs]
[GC (Allocation Failure)  5063K->930K(9216K), 0.0011219 secs]
[GC (Allocation Failure)  7584K->922K(9216K), 0.0150401 secs]
[GC (Allocation Failure)  7528K->904K(13312K), 0.0011162 secs]
[GC (System.gc())  1169K->910K(13312K), 0.0011134 secs]
[Full GC (System.gc())  910K->599K(13312K), 0.0061311 secs]
===== DaCapo 9.12-MR1 pmd starting =====
[GC (Allocation Failure)  11351K->3741K(13824K), 0.0710138 secs]
[Full GC (Ergonomics)  3741K->3431K(16384K), 0.0585798 secs]
[GC (Allocation Failure)  13159K->7022K(17408K), 0.0055747 secs]
[Full GC (Ergonomics)  7022K->3926K(19968K), 0.0216754 secs]
[GC (Allocation Failure)  13654K->5121K(24064K), 0.0040992 secs]
[GC (Allocation Failure)  17921K->6081K(24064K), 0.0153990 secs]
[GC (Allocation Failure)  18881K->7086K(27136K), 0.0100002 secs]
[GC (Allocation Failure)  22446K->7575K(27648K), 0.0313323 secs]
[GC (Allocation Failure)  22935K->8251K(31744K), 0.0061429 secs]
[GC (Allocation Failure)  27707K->14219K(36864K), 0.0787700 secs]
[GC (Allocation Failure)  33675K->21925K(48128K), 0.0874111 secs]
[Full GC (Ergonomics)  21925K->15860K(52736K), 0.1773813 secs]
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00007f31fcf5087e, pid=36, tid=0x00007f3000b50a00
#
# JRE version: OpenJDK Runtime Environment (8.0_242-b08) (build 1.8.0_242-b08)
# Java VM: OpenJDK 64-Bit Server VM (25.242-b08 mixed mode linux-amd64 compressed oops)
# Derivative: IcedTea 3.15.0
# Distribution: Custom build (Wed Jan 29 10:50:51 UTC 2020)
# Problematic frame:
# J 1094 C1 net.sourceforge.pmd.ast.JavaParser.jj_3R_117()Z (88 bytes) @ 0x00007f31fcf5087e [0x00007f31fcf502c0+0x5be]
#
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
bad count while changing owner (cpu.count=2 cpu.owner=139844147022336 owner=139844147019296)
[[  SGX-LKL ]] FAIL: Kernel panic! Aborting...
[[  SGX-LKL ]] =============================================================
[[  SGX-LKL ]] Stack traces for all lthreads:
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 1: tid=1 (7f3000b489d0) [java]
[[  SGX-LKL ]]     #0: 7f30005b36be in lthread_join(...)
[[  SGX-LKL ]]     #1: 7f3000599168 in __pthread_join(...)
[[  SGX-LKL ]]     #2: 7f31fdd36ece in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 2: tid=2 (7f3000b49de0) [vio-0]
[[  SGX-LKL ]]     #0: 7f30005a5696 in vio_wait_for_host_event(...)
[[  SGX-LKL ]]     #1: 7f30005a5866 in vio_enclave_process_host_event(...)
[[  SGX-LKL ]]     #2: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 3: tid=3 (7f3000b49fa0) [vio-1]
[[  SGX-LKL ]]     #0: 7f30005a5696 in vio_wait_for_host_event(...)
[[  SGX-LKL ]]     #1: 7f30005a5866 in vio_enclave_process_host_event(...)
[[  SGX-LKL ]]     #2: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 4: tid=4 (7f3000b4a160) [vio-2]
[[  SGX-LKL ]]     #0: 7f30005a5696 in vio_wait_for_host_event(...)
[[  SGX-LKL ]]     #1: 7f30005a5866 in vio_enclave_process_host_event(...)
[[  SGX-LKL ]]     #2: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 5: tid=5 (7f3000b4a320) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f300041254d in schedule_idle(...)
[[  SGX-LKL ]]     #8: 7f30000ae37a in do_idle(...)
[[  SGX-LKL ]]     #9: 7f30000ae5d5 in cpu_startup_entry(...)
[[  SGX-LKL ]]     #10: 7f30004102be in rest_init(...)
[[  SGX-LKL ]]     #11: 7f3000657988 in arch_call_rest_init(...)
[[  SGX-LKL ]]     #12: 7f3000657d2b in start_kernel(...)
[[  SGX-LKL ]]     #13: 7f3000658616 in lkl_run_kernel(...)
[[  SGX-LKL ]]     #14: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 6: tid=6 (7f3000b4a4e0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b469a in mutex_lock(...)
[[  SGX-LKL ]]     #5: 7f30000892da in __cpu_try_get_lock(...)
[[  SGX-LKL ]]     #6: 7f30000896c4 in lkl_cpu_try_run_irq(...)
[[  SGX-LKL ]]     #7: 7f30000887dc in lkl_trigger_irq(...)
[[  SGX-LKL ]]     #8: 7f300008896f in timer_fn(...)
[[  SGX-LKL ]]     #9: 7f30005b4c34 in timer_callback(...)
[[  SGX-LKL ]]     #10: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 7: tid=7 (7f3000b4a6a0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005b3516 in lthread_join(...)
[[  SGX-LKL ]]     #1: 7f30005b4950 in thread_exit(...)
[[  SGX-LKL ]]     #2: 7f3000087c5e in lkl_run_init(...)
[[  SGX-LKL ]]     #3: 7f300010d55f in search_binary_handler(...)
[[  SGX-LKL ]]     #4: 7f300010db65 in __do_execve_file(...)
[[  SGX-LKL ]]     #5: 7f300010dc9d in do_execve(...)
[[  SGX-LKL ]]     #6: 7f3000087602 in run_init_process(...)
[[  SGX-LKL ]]     #7: 7f30004102fc in kernel_init(...)
[[  SGX-LKL ]]     #8: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #9: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 8: tid=8 (7f3000b4a860) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a6b45 in kthreadd(...)
[[  SGX-LKL ]]     #9: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #10: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 9: tid=9 (7f3000b4aa20) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a1303 in worker_thread(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 10: tid=10 (7f3000b4abe0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a1303 in worker_thread(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 11: tid=11 (7f3000b4ade0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a1303 in worker_thread(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 12: tid=12 (7f3000b4afe0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a1eb6 in rescuer_thread(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 13: tid=13 (7f3000b4b1e0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a9c95 in smpboot_thread_fn(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 14: tid=14 (7f3000b4b3e0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f3000252726 in devtmpfsd(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 15: tid=15 (7f3000b4b5e0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a1eb6 in rescuer_thread(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 16: tid=34 (7f3000b4b7e0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a1eb6 in rescuer_thread(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 17: tid=35 (7f3000b4b9e0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a1eb6 in rescuer_thread(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 18: tid=36 (7f3000b4bbe0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000ebb54 in kswapd(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 19: tid=37 (7f3000b4bde0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a1303 in worker_thread(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 20: tid=38 (7f3000b4bfe0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f300023c815 in khvcd(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 21: tid=39 (7f3000b4c1e0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a1eb6 in rescuer_thread(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 22: tid=40 (7f3000b4c3e0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a1eb6 in rescuer_thread(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 23: tid=41 (7f3000b4c630) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f3000088bdf in idle_host_task_loop(...)
[[  SGX-LKL ]]     #6: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #7: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 24: tid=42 (7f3000b4c830) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f30005b822b in lkl_termination_thread(...)
[[  SGX-LKL ]]     #6: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 25: tid=43 (7f3000b4cce0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a1303 in worker_thread(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 26: tid=44 (7f3000b4caf0) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a1eb6 in rescuer_thread(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 27: tid=45 (7f3000b4cf50) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a1303 in worker_thread(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 28: tid=46 (7f3000b4d150) [kernel]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000a1eb6 in rescuer_thread(...)
[[  SGX-LKL ]]     #9: 7f30000a5fd4 in kthread(...)
[[  SGX-LKL ]]     #10: 7f3000087ef8 in thread_bootstrap(...)
[[  SGX-LKL ]]     #11: 7f30005b1fab in _exec(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 29: tid=47 (7f3000b4d330) [java]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95fb94 in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 30: tid=48 (7f3000b4d5c0) [java]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 31: tid=49 (7f3000b4d820) [java]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 32: tid=50 (7f3000b4da80) [java]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 33: tid=51 (7f3000b4dce0) [java]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 34: tid=52 (7f3000b4df40) [java]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 35: tid=53 (7f3000b4e1a0) [java]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 36: tid=54 (7f3000b4e400) [java]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 37: tid=55 (7f3000b4e660) [java]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 38: tid=56 (7f3000b4e8c0) [VM Thread]
[[  SGX-LKL ]]     #0: 7f300057c7ed in sched_yield(...)
[[  SGX-LKL ]]     #1: 7f31fd9a3bf9 in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 39: tid=57 (7f3000b4eb20) [Reference Handl]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 40: tid=58 (7f3000b4ed80) [Finalizer]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 41: tid=59 (7f3000b4efe0) [Signal Dispatch]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f300059baef in sem_timedwait(...)
[[  SGX-LKL ]]     #16: 7f300059bc0c in sem_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95a8e2 in <unknown>(...)
[[  SGX-LKL ]]     #18: 7f31765d2000 in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 42: tid=60 (7f3000b4f240) [C2 CompilerThre]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 43: tid=61 (7f3000b4f4a0) [C2 CompilerThre]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b469a in mutex_lock(...)
[[  SGX-LKL ]]     #5: 7f30000892da in __cpu_try_get_lock(...)
[[  SGX-LKL ]]     #6: 7f3000089462 in lkl_cpu_get(...)
[[  SGX-LKL ]]     #7: 7f3000088da3 in lkl_syscall(...)
[[  SGX-LKL ]]     #8: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #9: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #10: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #11: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #12: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 44: tid=62 (7f3000b4f700) [C2 CompilerThre]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b469a in mutex_lock(...)
[[  SGX-LKL ]]     #5: 7f30000892da in __cpu_try_get_lock(...)
[[  SGX-LKL ]]     #6: 7f3000089462 in lkl_cpu_get(...)
[[  SGX-LKL ]]     #7: 7f3000088da3 in lkl_syscall(...)
[[  SGX-LKL ]]     #8: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #9: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #10: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #11: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #12: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 45: tid=63 (7f3000b4f960) [C1 CompilerThre]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f31fd95f769 in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 46: tid=64 (7f3000b4fbc0) [Service Thread]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 47: tid=65 (7f3000b4fe20) [VM Periodic Tas]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f31fd95f769 in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 48: tid=66 (7f3000b50080) [PmdThread 1]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 49: tid=67 (7f3000b502e0) [PmdThread 2]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 50: tid=68 (7f3000b50540) [PmdThread 3]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 51: tid=69 (7f3000b507a0) [PmdThread 4]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] *52: tid=70 (7f3000b50a00) [PmdThread 5]
[[  SGX-LKL ]]     #0: 7f30005a8e0e in sgxlkl_fail(...)
[[  SGX-LKL ]]     #1: 7f30005b4271 in panic(...)
[[  SGX-LKL ]]     #2: 7f30000827d3 in lkl_bug(...)
[[  SGX-LKL ]]     #3: 7f300008802c in __switch_to(...)
[[  SGX-LKL ]]     #4: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #5: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #6: 7f3000412805 in io_schedule(...)
[[  SGX-LKL ]]     #7: 7f3000412bf0 in bit_wait_io(...)
[[  SGX-LKL ]]     #8: 7f3000412889 in __wait_on_bit(...)
[[  SGX-LKL ]]     #9: 7f300041296e in out_of_line_wait_on_bit(...)
[[  SGX-LKL ]]     #10: 7f30001389fa in __wait_on_buffer(...)
[[  SGX-LKL ]]     #11: 7f300017e879 in ext4_read_inode_bitmap(...)
[[  SGX-LKL ]]     #12: 7f300017f197 in __ext4_new_inode(...)
[[  SGX-LKL ]]     #13: 7f30001a6182 in ext4_create(...)
[[  SGX-LKL ]]     #14: 7f3000114d0d in path_openat(...)
[[  SGX-LKL ]]     #15: 7f3000115313 in do_filp_open(...)
[[  SGX-LKL ]]     #16: 7f3000104a7f in do_sys_open(...)
[[  SGX-LKL ]]     #17: 7f3000104aff in __se_sys_openat(...)
[[  SGX-LKL ]]     #18: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #19: 7f300052e42e in __filter_syscall4(...)
[[  SGX-LKL ]]     #20: 7f300052e55e in open(...)
[[  SGX-LKL ]]     #21: 7f31fda1d2c2 in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 53: tid=71 (7f3000b50c60) [PmdThread 6]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 54: tid=72 (7f3000b50ec0) [PmdThread 7]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] -------------------------------------------------------------
[[  SGX-LKL ]] 55: tid=73 (7f3000b51120) [PmdThread 8]
[[  SGX-LKL ]]     #0: 7f30005aaf5c in __do_futex_sleep(...)
[[  SGX-LKL ]]     #1: 7f30005aaffc in futex_wait(...)
[[  SGX-LKL ]]     #2: 7f30005ab258 in enclave_futex(...)
[[  SGX-LKL ]]     #3: 7f30005b4419 in futex_wait(...)
[[  SGX-LKL ]]     #4: 7f30005b451a in sem_down(...)
[[  SGX-LKL ]]     #5: 7f300008805f in __switch_to(...)
[[  SGX-LKL ]]     #6: 7f300041228d in __schedule(...)
[[  SGX-LKL ]]     #7: 7f30004124b2 in schedule(...)
[[  SGX-LKL ]]     #8: 7f30000d3a01 in futex_wait_queue_me(...)
[[  SGX-LKL ]]     #9: 7f30000d53a9 in futex_wait(...)
[[  SGX-LKL ]]     #10: 7f30000d671b in do_futex(...)
[[  SGX-LKL ]]     #11: 7f30000d6ee5 in sys_futex(...)
[[  SGX-LKL ]]     #12: 7f3000088e1f in lkl_syscall(...)
[[  SGX-LKL ]]     #13: 7f30005964a5 in __filter_syscall6(...)
[[  SGX-LKL ]]     #14: 7f30005965bb in __timedwait_cp(...)
[[  SGX-LKL ]]     #15: 7f3000598a7e in __pthread_cond_timedwait(...)
[[  SGX-LKL ]]     #16: 7f3000598e20 in pthread_cond_wait(...)
[[  SGX-LKL ]]     #17: 7f31fd95f57b in <unknown>(...)
[[  SGX-LKL ]] =============================================================
2020-07-19T15:08:54.000000Z [(H)ERROR] tid(0x7f4158e84700) | :OE_ENCLAVE_ABORTING [/home/prp/sgx-lkl/openenclave/host/calls.c:oe_call_enclave_function_by_table_id:91]
[   SGX-LKL  ] ethread (3: 19) [   SGX-LKL  ] FAIL: sgxlkl_ethread_init() failed (id=3 result=19 (OE_ENCLAVE_ABORTING))

I wonder if this is caused by #644 because signals are not delivered to the correct thread. (I suspect that the lkl_bug above (bad count while changing owner (cpu.count=2 cpu.owner=139844147022336 owner=139844147019296)) is a consequence of the signal handler trying to do a state dump to a file.)

On the other hand, this problem only seems to be appearing in hw mode and not in sw mode. It also seems to be more prevalent for multi-threaded tests...?

It also doesn't occur if JIT is turned off.
@prp prp added bug area: sgx-lkl Core SGX-LKL functionality p1 Medium priority labels Jul 19, 2020
@prp prp added this to the Milestone 1 milestone Jul 19, 2020
@prp prp mentioned this issue Jul 19, 2020
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@prp prp changed the title Some Java DaCapo benchmarks fail with unhandled SIGSEGVs Some Java DaCapo benchmarks fail with unhandled SIGSEGVs in hw mode Jul 19, 2020
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prp commented Jul 20, 2020 •
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With LKL syscall tracing (ignoring clock_gettime and futex calls):

[[ LKL SYSC ]] [tid=47 ] openat 56      (4294967196, /usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/server/libjvm.so, 0, 438) = 20
[[ LKL SYSC ]] [tid=47 ] readv  65      (20, 140601075578896, 2, 0, 0, 0) = 1087
[[ LKL SYSC ]] [tid=47 ] lseek  62      (20, 8941576, 0, 0, 0, 0) = 8941576
[[ LKL SYSC ]] [tid=47 ] readv  65      (20, 140601075578896, 2, 0, 0, 0) = 1087
[[ LKL SYSC ]] [tid=47 ] lseek  62      (20, 0, 1, 0, 0, 0) = 8942663
[[ LKL SYSC ]] [tid=47 ] lseek  62      (20, 9584, 0, 0, 0, 0) = 9584
[[ LKL SYSC ]] [tid=47 ] readv  65      (20, 140601075578784, 2, 0, 0, 0) = 12711
[[ LKL SYSC ]] [tid=47 ] lseek  62      (20, 8941832, 0, 0, 0, 0) = 8941832
[[ LKL SYSC ]] [tid=47 ] readv  65      (20, 140601075578896, 2, 0, 0, 0) = 1087
[[ LKL SYSC ]] [tid=47 ] lseek  62      (20, 0, 1, 0, 0, 0) = 8942919
[[ LKL SYSC ]] [tid=47 ] lseek  62      (20, 21272, 0, 0, 0, 0) = 21272
[[ LKL SYSC ]] [tid=47 ] readv  65      (20, 140601075578784, 2, 0, 0, 0) = 8805
[[ LKL SYSC ]] [tid=47 ] lseek  62      (20, 8941896, 0, 0, 0, 0) = 8941896
[[ LKL SYSC ]] [tid=47 ] readv  65      (20, 140601075578896, 2, 0, 0, 0) = 1087
[[ LKL SYSC ]] [tid=47 ] read   63      (20, 140600208234512, 1024, 0, 0, 0) = 385
[[ LKL SYSC ]] [tid=47 ] lseek  62      (20, 0, 1, 0, 0, 0) = 8943368
[[ LKL SYSC ]] [tid=47 ] lseek  62      (20, 8941344, 0, 0, 0, 0) = 8941344
[[ LKL SYSC ]] [tid=47 ] readv  65      (20, 140601075578784, 2, 0, 0, 0) = 1250
[[ LKL SYSC ]] [tid=47 ] lseek  62      (20, 8943368, 0, 0, 0, 0) = 8943368
[[ LKL SYSC ]] [tid=47 ] lseek  62      (20, 64, 0, 0, 0, 0) = 64
[[ LKL SYSC ]] [tid=47 ] readv  65      (20, 140601075578976, 2, 0, 0, 0) = 1079
[[ LKL SYSC ]] [tid=47 ] lseek  62      (20, -687, 1, 0, 0, 0) = 456
[[ LKL SYSC ]] [tid=47 ] close  57      (20, 0, 0, 0, 0, 0) = 0
[[ LKL SYSC ]] [tid=47 ] openat 56      (4294967196, /usr/lib/jvm/java-1.8-openjdk/jre/lib/amd64/server/libjvm.so, 524288, 0) = 20
[[ LKL SYSC ]] [tid=47 ] fcntl  25      (20, 2, 1, 0, 0, 0) = 0
[[ LKL SYSC ]] [tid=47 ] fstat  80      (20, 140601075577632, 0, 0, 0, 0) = 0
[[ LKL SYSC ]] [tid=47 ] close  57      (20, 0, 0, 0, 0, 0) = 0

Thread 11 "ENCLAVE" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffc9ffb700 (LWP 26646)]
0x00007fe03865f3ef in ?? ()

@prp prp mentioned this issue Jul 23, 2020
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prp commented Jul 27, 2020

This appears to be caused by the fact that the in-enclave signal handler does not report the faulting address of a page fault correctly to the JVM. With SGX1, there does not seem to be a way to obtain the address that caused the page fault.

@prp prp mentioned this issue Jul 27, 2020
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@davidchisnall davidchisnall added the needs-triage Bug does not yet have a priority assigned label Jul 28, 2020
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During triaging, it was decided to close this as a duplicate of #680.

@SeanTAllen SeanTAllen removed the needs-triage Bug does not yet have a priority assigned label Jul 28, 2020
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area: sgx-lkl Core SGX-LKL functionality bug p1 Medium priority
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Add Java DaCapo benchmark sample + provide fixes lsds/sgx-lkl
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