* [bug #30162] "abort to unknown prompt" can be infinitely recursive
@ 2010-06-17 3:57 Mike Gran
2010-06-20 16:15 ` Ludovic Courtès
0 siblings, 1 reply; 5+ messages in thread
From: Mike Gran @ 2010-06-17 3:57 UTC (permalink / raw)
To: Mike Gran, bug-guile
URL:
<http://savannah.gnu.org/bugs/?30162>
Summary: "abort to unknown prompt" can be infinitely
recursive
Project: Guile
Submitted by: mike121
Submitted on: Thu 17 Jun 2010 03:57:33 AM GMT
Category: None
Severity: 3 - Normal
Item Group: None
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
_______________________________________________________
Details:
It appears that aborting to a unknown prompt when no prompt yet exists will
cause a recursive overflow leading to segfault.
To see the bug, try replacing (srcdir)/module/ice-9/eval.go with a zero
length file. This will cause an "object file too small" error to be thrown
from make_objcode_by_mmap() before a prompt exists.
It may be that the commit "remove internal treatment of default prompt tag"
c6a32a2cd59190dcf17c7fb3022588f56079a03e may have removed code that was
necessary after all. But that's just a guess.
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^ permalink raw reply [flat|nested] 5+ messages in thread* [bug #30162] "abort to unknown prompt" can be infinitely recursive
2010-06-17 3:57 [bug #30162] "abort to unknown prompt" can be infinitely recursive Mike Gran
@ 2010-06-20 16:15 ` Ludovic Courtès
2010-06-20 18:35 ` Mike Gran
0 siblings, 1 reply; 5+ messages in thread
From: Ludovic Courtès @ 2010-06-20 16:15 UTC (permalink / raw)
To: Ludovic Courtès, Mike Gran, bug-guile
Follow-up Comment #1, bug #30162 (project guile):
Hi Mike,
Guile pristine builds have been failing for a few days with "Cannot exit
gracefully when init is in progress; aborting":
<http://hydra.nixos.org/build/460404>.
I haven't yet taken the time to investigate, but it this how you found out
about this problem?
Thanks,
Ludo'.
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^ permalink raw reply [flat|nested] 5+ messages in thread* [bug #30162] "abort to unknown prompt" can be infinitely recursive
2010-06-20 16:15 ` Ludovic Courtès
@ 2010-06-20 18:35 ` Mike Gran
2011-01-23 15:30 ` Mike Gran
0 siblings, 1 reply; 5+ messages in thread
From: Mike Gran @ 2010-06-20 18:35 UTC (permalink / raw)
To: Ludovic Courtès, Mike Gran, bug-guile
Follow-up Comment #2, bug #30162 (project guile):
I came across the problem when I built Guile master on a Cygwin box with a
misconfigured iconv/libunistring that didn't have any encodings other than "C"
and "POSIX" available. With only those encodings, the guile-tools compilation
process on non-ASCII files appears to succeed but actually creates zero-length
.go files. When running Guile with zero-length .go files, there is some sort
of scm_misc_error about mmap'ing .go files. That error happens really early
in the startup, before a prompt has been created. This leads to the recursive
"abort to unknown prompt" problem, which causes segfault.
At first glance, it doesn't appear that this problem is related to today's
hydra build failure.
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^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2011-02-09 22:33 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
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2010-06-17 3:57 [bug #30162] "abort to unknown prompt" can be infinitely recursive Mike Gran
2010-06-20 16:15 ` Ludovic Courtès
2010-06-20 18:35 ` Mike Gran
2011-01-23 15:30 ` Mike Gran
2011-02-09 22:33 ` Andy Wingo
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