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Date: Tue, 18 Dec 2012 09:55:54 +0400
From: ojab <ojab@...b.ru>
To: musl@...ts.openwall.com
Subject: Re: LLVM testsuite, close-stderr.ll hangs
On 17.12.2012 21:22, Rich Felker wrote:
> On Mon, Dec 17, 2012 at 11:58:29AM -0500, Rich Felker wrote:
> To track this down, you could run under gdb and just interrupt the
> program and look at a backtrace once it hangs. This should make it
> clear whether exit was called recursively.
>
> Rich
>
Looks something like that (gdb output in the attached file, `bt` while
`opt` hangs in the bottom): I've set `break exit` and stepped till it
hangs, first exit() happens in command line parsing
(https://github.com/llvm-mirror/llvm/blob/master/lib/Support/CommandLine.cpp#L846),
which calls report_fatal_error("IO failure on output stream.");, which
calls exit itself.
Looks like (note that I'm barely know C/C++) something wrong in ostream
destruction: after changing ifdef to ifndef @
https://github.com/llvm-mirror/llvm/blob/master/lib/Support/raw_ostream.cpp#L501
all works as it should:
> ~ # /root/llvm-build/Release+Asserts/bin/opt --reject-this-option 2>&-
> ~ # echo $?
> 1
//wbr ojab
View attachment "gdb_stderr.log" of type "text/plain" (42334 bytes)
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