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[Libunwind-devel] libunwind issue in dwarf_get

From: Manish
Subject: [Libunwind-devel] libunwind issue in dwarf_get
Date: Tue, 7 Jun 2016 18:58:15 +0530

Hi Libunwind Dev Team,

I am facing an issue with libunwind in my project, which I am not able to debug much. 
I see so many related posts in the internet, so I feel there is already an  issue with libunwind.
Please suggest solution for this issue.

Libunwind version we are using is : 0.99

The back trace I get is as below:

#0  dwarf_get (val=<optimized out>, loc=..., c=<optimized out>) at ../contrib/libunwind/include/tdep-mips/libunwind_i.h:122
#1  apply_reg_state (c=0x55681cce70, rs=0x5568069838 <local_addr_space+215176>) at ../contrib/libunwind/src/dwarf/Gparser.c:843
#2  0x000000556801c504 in cached_dwarf_find_save_locs (c=0x55681cce70) at ../contrib/libunwind/src/dwarf/Gparser.c:940
#3  0x000000556801c6fc in _ULmips_dwarf_find_save_locs (c=0x55681cce70) at ../contrib/libunwind/src/dwarf/Gparser.c:967
#4  0x000000556801ca70 in _ULmips_dwarf_step (c=0x1214036c8 <raise_interrupt_level+776>) at ../contrib/libunwind/src/dwarf/Gstep.c:35
#5  0x000000556801e97c in _ULmips_step (cursor=0x1214036c8 <raise_interrupt_level+776>) at ../contrib/libunwind/src/mips/Gstep.c:49
#6  0x000000556659a644 in backtrace_unwind (buffer=<optimized out>, size=16) at infra/btrace/./src/backtrace_unwind.c:139
#7  0x0000005566cf7998 in traceback_via_libunwind (buf=0x1255e9401 <tracebuf+49> "", frames2skip=4, space_left_tb=0x55681cbf68) at ../traceback_libunwind.c:53
#8  0x00000001202f210c in traceback_format (buf=0x1255e9401 <tracebuf+49> "", len=<optimized out>, frames2skip=3, somap=<optimized out>) at ../traceback_ios.c:227
#9  0x00000001214116b0 in unix_check_cpuhog (pc=0x1214036c8 <raise_interrupt_level+776>, lr=0x1202c87d4 <random_gen+92>, fp=0x0, platform=0x5566cfc710 "ASR1000") at ../src-unix/unix_watchdog.c:176
#10 0x0000005566ce9560 in catch_linuxsignals (sig=28, siginfo=<optimized out>, uctx=0x55681cdd68) at ../common/unix_signals.c:237
#11 <signal handler called>
#12 0x00000001214036c8 in raise_interrupt_level (new_level=2) at ../src-unix/unix_thread_intr.c:569

Thanks & Regards,

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