#5177: Segfault in reportCCSProfiling
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Reporter: dankna | Owner:
Type: bug | Status: new
Priority: normal | Component: Profiling
Version: 7.1 | Keywords:
Testcase: | Blockedby:
Os: MacOS X | Blocking:
Architecture: x86_64 (amd64) | Failure: Runtime crash
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The test case is rather hard to reduce; sorry about that. I can provide
my entire program on request, but it's hard to build, too, due to its
polyglot nature. It may be relevant to know that I am running Haskell as
a library from an Objective C main program. This does reproduce for me,
so I can try further experiments if anyone can suggest any. The crash
happens only when -O2 is turned on, not when only -O is. It also does not
happen if -O2 and -funbox-strict-fields are on
My version is a GHC that I built myself from git; it comes up as
7.1.20110504-x86_64. I am running on OS X 10.6.7 with XCode 4. Here is a
stack trace produced by gdb:
{{{
#0 0x00007fff83fac120 in strlen ()
#1 0x00007fff83fb7b1c in __vfprintf ()
#2 0x00007fff83ff8dcb in vfprintf_l ()
#3 0x00007fff83ff8d4e in fprintf ()
#4 0x0000000100250775 in reportCCSProfiling ()
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5177>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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