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bug#40737: closed (Segfault in arm gcc7, thumb2 builroot, with arm patch


From: GNU bug Tracking System
Subject: bug#40737: closed (Segfault in arm gcc7, thumb2 builroot, with arm patch)
Date: Mon, 22 Jun 2020 15:19:02 +0000

Your message dated Mon, 22 Jun 2020 11:18:08 -0400
with message-id 
<CAFGZJC51U5RLyaQVdJEU_DgXnQpWdCctPr0yDeKN96mBtxP9yg@mail.gmail.com>
and subject line 40737-done@debbugs.gnu.org
has caused the debbugs.gnu.org bug report #40737,
regarding Segfault in arm gcc7, thumb2 builroot, with arm patch
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs@gnu.org.)


-- 
40737: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=40737
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems
--- Begin Message --- Subject: Segfault in arm gcc7, thumb2 builroot, with arm patch Date: Mon, 20 Apr 2020 19:34:28 +0000 Here is a backtrace of running guile on a builtroot constructed system for rpi3.
Thumb2 instructions: BR2_ARM_INSTRUCTIONS_THUMB2=y
Gcc 7.5: BR2_GCC_VERSION="7.5.0"
Glibc.

Uses the patch from https://gitlab.com/wingo/lightening/-/merge_requests/3

I hope this makes it through the mail client ok. 

-Dale

Core was generated by `guile'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x76ee6f12 in ?? ()
[Current thread is 1 (LWP 507)]
(gdb) thread apply all backtrace

Thread 5 (LWP 508):
#0  0x76e59674 in __libc_do_syscall () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libpthread.so.0
#1  0x76e5499e in pthread_cond_wait@@GLIBC_2.4 () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libpthread.so.0
#2  0x76e7d7aa in GC_wait_marker () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libgc.so.1
#3  0x76e7dab0 in GC_help_marker () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libgc.so.1
#4  0x76e7db26 in GC_mark_thread () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libgc.so.1
#5  0x76e4fbb0 in start_thread () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libpthread.so.0
#6  0x76b450ec in ?? () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libc.so.6
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 4 (LWP 510):
#0  0x76e59674 in __libc_do_syscall () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libpthread.so.0
#1  0x76e5499e in pthread_cond_wait@@GLIBC_2.4 () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libpthread.so.0
#2  0x76e7d7aa in GC_wait_marker () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libgc.so.1
#3  0x76e7dab0 in GC_help_marker () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libgc.so.1
#4  0x76e7db26 in GC_mark_thread () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libgc.so.1
#5  0x76e4fbb0 in start_thread () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libpthread.so.0
#6  0x76b450ec in ?? () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libc.so.6
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 3 (LWP 511):
#0  0x76e59674 in __libc_do_syscall () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libpthread.so.0
#1  0x76e57720 in read () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libpthread.so.0
#2  0x76ef8aee in read_finalization_pipe_data (data="" at finalizers.c:205
#3  0x76e7cea8 in GC_do_blocking_inner () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libgc.so.1
#4  0x76e7b068 in GC_with_callee_saves_pushed () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libgc.so.1
#5  0x76e7b094 in GC_do_blocking () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libgc.so.1
#6  0x76f3f10c in scm_without_guile (func=0x76ef8add <read_finalization_pipe_data>, data="" at threads.c:706
#7  0x76ef8d7a in finalization_thread_proc (unused=<optimized out>) at finalizers.c:218
#8  0x76eef876 in c_body (d=0x74c1fe1c) at continuations.c:430
#9  0x76f4298e in vm_debug_engine (thread=0x76a46c00) at vm-engine.c:972
#10 0x76f47b9c in scm_call_n (proc=0x7521dc70, argv=argv@entry=0x74c1fbc0, nargs=nargs@entry=2) at vm.c:1608
#11 0x76ef22c4 in scm_call_2 (proc=<optimized out>, arg1=<optimized out>, arg2=<optimized out>) at eval.c:503
#12 0x76ef31a2 in scm_c_with_exception_handler (type=type@entry=0x404, handler=0x76f3f9b9 <catch_post_unwind_handler>, handler_data=handler_data@entry=0x74c1fda8,
    thunk=0x76f3fa7d <catch_body>, thunk_data=thunk_data@entry=0x74c1fda8) at exceptions.c:170
#13 0x76f3fbd4 in scm_c_catch (tag=tag@entry=0x404, body=body@entry=0x76eef86d <c_body>, body_data=body_data@entry=0x74c1fe1c,
    handler=handler@entry=0x76eefa1d <c_handler>, handler_data=handler_data@entry=0x74c1fe1c,
    pre_unwind_handler=pre_unwind_handler@entry=0x76eef8fb <pre_unwind_handler>, pre_unwind_handler_data=pre_unwind_handler_data@entry=0x751fc300) at throw.c:168
--Type <RET> for more, q to quit, c to continue without paging--c
#14 0x76eefba2 in scm_i_with_continuation_barrier (body=0x76eef86d <c_body>, body_data=body_data@entry=0x74c1fe1c, handler=0x76eefa1d <c_handler>, handler_data=handler_data@entry=0x74c1fe1c, pre_unwind_handler=0x76eef8fb <pre_unwind_handler>, pre_unwind_handler_data=0x751fc300) at continuations.c:368
#15 0x76eefc06 in scm_c_with_continuation_barrier (func=<optimized out>, data="" out>) at continuations.c:464
#16 0x76f3edd4 in with_guile (base=0x74c1fe4c, data="" at threads.c:645
#17 0x76e78e98 in GC_call_with_stack_base () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libgc.so.1
#18 0x76f3f0cc in scm_i_with_guile (dynamic_state=<optimized out>, data="" out>, func=<optimized out>) at threads.c:688
#19 scm_with_guile (func=<optimized out>, data="" out>) at threads.c:694
#20 0x76e4fbb0 in start_thread () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libpthread.so.0
#21 0x76b450ec in ?? () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libc.so.6
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 2 (LWP 509):
#0  0x76e59674 in __libc_do_syscall () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libpthread.so.0
#1  0x76e5499e in pthread_cond_wait@@GLIBC_2.4 () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libpthread.so.0
#2  0x76e7d7aa in GC_wait_marker () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libgc.so.1
#3  0x76e7dab0 in GC_help_marker () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libgc.so.1
#4  0x76e7db26 in GC_mark_thread () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/usr/lib/libgc.so.1
#5  0x76e4fbb0 in start_thread () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libpthread.so.0
#6  0x76b450ec in ?? () from /home/dales/br/rpi/host/arm-buildroot-linux-gnueabihf/sysroot/lib/libc.so.6
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 1 (LWP 507):
#0  0x76ee6f12 in scm_is_pair (x=0x0) at pairs.h:182
#1  scm_sloppy_assq (key=0x752076f0, alist=0x0) at alist.c:59
#2  0x76effef8 in scm_hash_fn_ref (table=table@entry=0x751da8b0, obj=obj@entry=0x752076f0, dflt=dflt@entry=0x4, hash_fn=hash_fn@entry=0x76eff79d <scm_ihashq>, assoc_fn=0x76ee6f0d <scm_sloppy_assq>, closure=closure@entry=0x0) at hashtab.c:300
#3  0x76efff5c in scm_hashq_ref (table=0x751da8b0, key=key@entry=0x752076f0, dflt=0x4, dflt@entry=0x904) at hashtab.c:426
#4  0x76f11f74 in scm_module_variable (module=0x74f281e0, sym=0x752076f0) at modules.c:500
#5  0x76f430c4 in vm_debug_engine (thread=0x76a46e00) at vm-engine.c:1560
#6  0x76f47b9c in scm_call_n (proc=0x74107800, argv=argv@entry=0x7eb8fb64, nargs=nargs@entry=1) at vm.c:1608
#7  0x76ef22b0 in scm_call_1 (proc=<optimized out>, arg1=<optimized out>) at eval.c:496
#8  0x76f4298e in vm_debug_engine (thread=0x76a46e00) at vm-engine.c:972
#9  0x76f47b9c in scm_call_n (proc=0x7521dc30, argv=argv@entry=0x7eb8fdb0, nargs=nargs@entry=4) at vm.c:1608
#10 0x76ef22f4 in scm_call_4 (proc=<optimized out>, arg1=arg1@entry=0x751fc300, arg2=arg2@entry=0x74d09810, arg3=arg3@entry=0x76a4ab60, arg4=arg4@entry=0x7416c0b8) at eval.c:517
#11 0x76eea9a0 in scm_print_exception (port=port@entry=0x751fc300, frame=frame@entry=0x74d09810, key=key@entry=0x76a4ab60, args=args@entry=0x7416c0b8) at backtrace.c:121
#12 0x76eef994 in print_exception_and_backtrace (args=0x7416c0b8, tag=0x76a4ab60, port=0x751fc300) at continuations.c:415
#13 pre_unwind_handler (error_port=0x751fc300, tag=0x76a4ab60, args=0x7416c0b8) at continuations.c:453
#14 0x76f3fa2e in catch_pre_unwind_handler (data="" exn=0x74159fa0) at throw.c:135
#15 0x76f4298e in vm_debug_engine (thread=0x76a46e00) at vm-engine.c:972
#16 0x76f47b9c in scm_call_n (proc=proc@entry=0x7521dc50, argv=0x7eb90068, nargs=5) at vm.c:1608
#17 0x76ef245a in scm_apply_0 (proc=0x7521dc50, args=0x304) at eval.c:603
#18 0x76ef2afa in scm_apply_1 (proc=<optimized out>, arg1=arg1@entry=0x76a4ab60, args=args@entry=0x74d098c8) at eval.c:609
#19 0x76f3fd1c in scm_throw (key=0x76a4ab60, key@entry=0x76f8bd90 <throw_var>, args=0x74d098c8) at throw.c:262
#20 0x76f3fe22 in scm_ithrow (key=key@entry=0x76f8bd90 <throw_var>, args=<optimized out>, no_return=no_return@entry=1) at throw.c:457
#21 0x76ef0e66 in scm_error_scm (key=key@entry=0x76f8bd90 <throw_var>, subr=subr@entry=0x4, message=message@entry=0x76a4ab60, args=args@entry=0x304, data="" at error.c:90
#22 0x76f41c4a in bind_kwargs (thread=<optimized out>, npositional=<optimized out>, nlocals=14, kwargs=0x75145ce0, strict=1 '\001', allow_other_keys=0 '\000') at vm.c:1015
#23 0x7500c6e4 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

(gdb) info reg
r0             0x752076f0          1965061872
r1             0x0                 0
r2             0x0                 0
r3             0x76ee6f0d          1995337485
r4             0x4                 4
r5             0x76f7c000          1995948032
r6             0x751da8b0          1964878000
r7             0x752076f0          1965061872
r8             0x3                 3
r9             0x74c6d160          1959186784
r10            0x76f8c7e4          1996015588
r11            0x76f7c000          1995948032
r12            0x76f7c288          1995948680
sp             0x7eb8f8d8          0x7eb8f8d8
lr             0x76effef9          1995439865
pc             0x76ee6f12          0x76ee6f12 <scm_sloppy_assq+6>
cpsr           0x40000030          1073741872
fpscr          0x0                 0

(gdb) disassem /r 0x76ee6f12,+8
Dump of assembler code from 0x76ee6f12 to 0x76ee6f1a:
=> 0x76ee6f12 <scm_sloppy_assq+6>:      0b 68   ldr     r3, [r1, #0]
   0x76ee6f14 <scm_sloppy_assq+8>:      da 07   lsls    r2, r3, #31
   0x76ee6f16 <scm_sloppy_assq+10>:     0a d4   bmi.n   0x76ee6f2e <scm_sloppy_assq+34>
   0x76ee6f18 <scm_sloppy_assq+12>:     13 f0 06 0f     tst.w   r3, #6
End of assembler dump.


--- End Message ---
--- Begin Message --- Subject: address@hidden Date: Mon, 22 Jun 2020 11:18:08 -0400
Fixed in the 3.0.3 release by commit 7e814190e


--- End Message ---

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