GNU bug report logs -
#25912
2.1.7 segfaults on cygwin
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Reported by: szgyg <szgyg <at> ludens.elte.hu>
Date: Wed, 1 Mar 2017 11:05:02 UTC
Severity: normal
Found in version 2.1.7
Done: Andy Wingo <wingo <at> pobox.com>
Bug is archived. No further changes may be made.
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Your message dated Tue, 14 Mar 2017 12:35:34 +0100
with message-id <87a88o8515.fsf <at> pobox.com>
and subject line Re: bug#25912: 2.1.7 segfaults on cygwin
has caused the debbugs.gnu.org bug report #25912,
regarding 2.1.7 segfaults on cygwin
to be marked as done.
(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)
--
25912: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=25912
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems
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I got two identical segfaults from make -j2 on 32-bit cygwin, and
three identical segfaults from make -j3 on 64-bit at the same point.
Any idea?
-----------------
Making all in bootstrap
make[2]: Entering directory '/home/szgyg/usr/src/CYGPORT/guile2-2.1.7-0.i686/build/bootstrap'
BOOTSTRAP GUILEC ice-9/eval.go
wrote `ice-9/eval.go'
BOOTSTRAP GUILEC ice-9/psyntax-pp.go
BOOTSTRAP GUILEC language/cps/intmap.go
*** starting debugger for pid 5024, tid 4568
*** starting debugger for pid 5060, tid 1904
----------------
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 5024.0x11d8]
vm_regular_engine (thread=0x20081e40, vp=0x200f0f78, registers=0x22c480,
resume=0) at /usr/src/debug/guile2-2.1.7-0/libguile/vm-engine.c:1840
1840 *dst_loc = src;
(gdb) info locals
src = 0x7ff800d8
dst_loc = 0x7ff8d00c
op = 63
jump_table_ = {0x64b956d1 <vm_regular_engine+145>,
[...]
(gdb) print *dst_loc
$3 = (void *) 0x0
(gdb) print *dst_loc = src
Cannot access memory at address 0x7ff8d00c
(gdb) print argv[13]
$16 = 0x612eba68 "language/cps/intmap.go"
---------------------
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 5060.0x770]
vm_regular_engine (thread=0x20081e40, vp=0x200f0f78, registers=0x22c480,
resume=0) at /usr/src/debug/guile2-2.1.7-0/libguile/vm-engine.c:1840
1840 *dst_loc = src;
(gdb) info locals
src = 0x7ff800d8
dst_loc = 0x7ff8d00c
op = 63
jump_table_ = {0x64b956d1 <vm_regular_engine+145>,
[...]
(gdb) print argv[13]
$6 = 0x612eba68 "ice-9/psyntax-pp.go"
-----------------------
Making all in bootstrap
make[2]: Entering directory '/home/szgyg/usr/src/CYGPORT/guile/guile2-2.1.7-0.x86_64/build/bootstrap'
BOOTSTRAP GUILEC ice-9/eval.go
wrote `ice-9/eval.go'
BOOTSTRAP GUILEC ice-9/psyntax-pp.go
BOOTSTRAP GUILEC language/cps/intmap.go
*** starting debugger for pid 9848, tid 6772
BOOTSTRAP GUILEC language/cps/intset.go
*** starting debugger for pid 6600, tid 376
*** starting debugger for pid 10136, tid 9064
--------------------------
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 6600.0x178]
vm_regular_engine (thread=0x600091e00, vp=0x600131f30, registers=0x1, resume=0)
at /usr/src/debug/guile2-2.1.7-0/libguile/vm-engine.c:1840
1840 /usr/src/debug/guile2-2.1.7-0/libguile/vm-engine.c: No such file or directory.
(gdb)
(gdb) info locals
src = 0x6fffffd0128
dst_loc = 0x6fffffdd010
op = 63
jump_table_ = {0x4236bece4 <vm_regular_engine+180>, 0x4236bed84 <vm_regular_engine+340>,
[...]
------------------------
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 9848.0x1a74]
vm_regular_engine (thread=0x600091e00, vp=0x600130f30, registers=0x1, resume=0)
at /usr/src/debug/guile2-2.1.7-0/libguile/vm-engine.c:1840
1840 /usr/src/debug/guile2-2.1.7-0/libguile/vm-engine.c: No such file or directory.
(gdb) info locals
src = 0x6fffffd0128
dst_loc = 0x6fffffdd010
op = 63
jump_table_ = {0x4236bece4 <vm_regular_engine+180>, 0x4236bed84 <vm_regular_engine+340>,
[...]
-------------------------
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 10136.0x2368]
vm_regular_engine (thread=0x600091e00, vp=0x600131f30, registers=0x1, resume=0)
at /usr/src/debug/guile2-2.1.7-0/libguile/vm-engine.c:1840
1840 /usr/src/debug/guile2-2.1.7-0/libguile/vm-engine.c: No such file or directory.
(gdb) info locals
src = 0x6fffffd0128
dst_loc = 0x6fffffdd010
op = 63
jump_table_ = {0x4236bece4 <vm_regular_engine+180>, 0x4236bed84 <vm_regular_engine+340>,
[...]
-----------------------
$ less -N +g1840 vm-engine.c
1821 /* static-patch! _:24 dst-offset:32 src-offset:32
1822 *
1823 * Patch a pointer at DST-OFFSET to point to SRC-OFFSET. Both offsets
1824 * are signed 32-bit values, indicating a memory address as a number
1825 * of 32-bit words away from the current instruction pointer.
1826 */
1827 VM_DEFINE_OP (63, static_patch, "static-patch!", OP3 (X32, LO32, L32))
1828 {
1829 scm_t_int32 dst_offset, src_offset;
1830 void *src;
1831 void** dst_loc;
1832
1833 dst_offset = ip[1];
1834 src_offset = ip[2];
1835
1836 dst_loc = (void **) (ip + dst_offset);
1837 src = ip + src_offset;
1838 VM_ASSERT (ALIGNED_P (dst_loc, void*), abort());
1839
1840 *dst_loc = src;
1841
1842 NEXT (3);
1843 }
1844
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On Fri 03 Mar 2017 15:32, Mike Gran <spk121 <at> yahoo.com> writes:
> I also can replicate the Cygwin problem as originally described.
I understand that with the fix in 2.1.8, that things are working
correctly now; closing the report. Thanks for the sleuthing, szgyg and
Mike!
Andy
This bug report was last modified 8 years and 69 days ago.
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