3135121 - Dumping shared memory hang with the deadlock in IBM OS function_global_lock_common

• In errorlog, we can see some messages like below: 00:0006:00000:00304:2021/11/30 02:32:35.55 kernel Current process (0x6e450638) infected with signal 11 (SIGSEGV)

           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel Current Process is running on Engine 0
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel Address 0x0900000000046568 (), siginfo (code, address) = (50, 0x4070352c2040704e)
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel **** Saved signal context (0x000000019e6a86e0): **** 
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel __sc_onstack: 0x0, __sc_uerror: 55
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel uc_sigmask: 0xffffffff1ffef877 0xffffffffffffffff 0xffffffffffffffff 0x7fffffffffffffff
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel Machine Save State:
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel PC (iar): 0900000000046568 ()
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel Link Register (lr): 09000000000478ac ()
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel Stack Pointer (stkp): 000000019e6a9bd0
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel msr : a00000000200d032 ctr : 09000000005cc580 cr : 42222428
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel xer : 20000010 00:0006:00000:00304:2021/11/30 02:32:35.55 kernel r0 :
           0000000000000120 r1 : 000000019e6a9bd0 r2 : 09001000a008f8b0
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel r3 : 0000000000000001 r4 : 09001000a009e0e0 r5 : 4070352c20407036
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel r6 : 2c204070372c2040 r7 : 00000001113fc6c0 r8 : 00000001113fc6c0
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel r9 : 000000011136f1c0 r10 : 09001000a009f508 r11 : 09001000a009f508
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel r12 : 000000011136f1c0 r13 : 0000000110d6e800 r14 : 000000027ac5ac08
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel r15 : 0000000000000000 r16 : 0000000241056000 r17 : 0000000000020000
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel r18 : 0000000110000f20 r19 : 0000000000000001 r20 : 0000000000000053
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel r21 : 0000000000000053 r22 : 09001000a009f518 r23 : 0000000000000000
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel r24 : 09001000a0006e60 r25 : 000000011136f180 r26 : 0000000000000040
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel r27 : 000000011136f1c0 r28 : 0000000000000160 r29 : 09001000a009e0e0
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel r30 : 000000011136f180 r31 : 000000011136f190
           00:0006:00000:00304:2021/11/30 02:32:35.55 kernel **** end of signal context ****
           00:0006:00000:00304:2021/11/30 02:32:35.56 server Initiating shared memory dump for signal 11

• Since the dump got hang, we didn't get the full stack. Customer tried to run "procstack" after the server went into hang

	---------- tid# 54460771 (pthread ID:   1543) ----------
	0x090000000059c98c  _global_lock_common(??, ??, ??) + 0x42c
	0x090000000004a2b8  malloc_y(0x0, 0x0, 0x9001000a007e1d8, 0x9001000a0003e88, 0x0, 0x0, 0xf1000b0186527800, 0x8000000000001032) + 0x198
	0x090000000002e308  malloc_common@AF104_87(??) + 0x48
	0x090000000002e270  malloc@AF103_98(??) + 0xd0
	0x09000000000646c8  qsort(??, ??, ??, ??) + 0x88
	0x0000000100b3d83c  shm_build_memmap(??, ??, ??) + 0x5a8
	0x0000000100b3d264  shm__alloc_regions(??, ??) + 0x8
	0x0000000100b3b4c8  shm__memdump(??, ??, ??) + 0x314
	0x0000000100b3a06c  shm_memdump_server(??, ??, ??, ??) + 0x534
	0x0000000100b322b4  csmd_dump_condition(??, ??, ??, ??, ??, ??) + 0x1a8
	0x00000001018c59f8  kisignal(0x1eed31930, 0x0, 0x0) + 0x7a0
	0x0000000000004b34  sig_epilog64() + 0xc
	0x090000000059c988  _global_lock_common(??, ??, ??) + 0x428
	...omitted...
	0x090000000059c988  _global_lock_common(??, ??, ??) + 0x428
	...omitted...
	0x00000001636c95dc  ...  + 0x36c95dc

• SAP Adaptive Enterprise 16.x

• SAP Adaptive Enterprise 15.7

• IBM AIX 7.2

KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , BC-DB-SYB , Business Suite on Adaptive Server Enterprise , Known Error