Re: [GHC] #10375: arm: ghci hits an illegal instruction

26 May 2015

      #10375: arm: ghci hits an illegal instruction
-------------------------------------+---------------------------------
        Reporter:  erikd             |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.10.2
       Component:  GHCi              |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:  arm
 Type of failure:  GHCi crash        |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Comment (by erikd):

 I smell a rat, or maybe its a red herring. Seem to be getting SIGSEGV
 inside the call to `pthread_cond_init`. A bit of googling tells me that
 AddressSanitizer intercepts calls to `pthread_cond_init` and can get it
 wrong eg : https://code.google.com/p/address-
 sanitizer/issues/detail?id=297 .

 Sure enough, trivial C program:

 {{{
 #include 
 #include 
 int main (void)
 {   pthread_cond_t cond;
     pthread_cond_init(&cond, NULL);
     return 0;
 }
 }}}

 Works correctly when compiled and run (even under Valgrind) as:

 {{{
 gcc -Wall cond_init.c -o cond_init && valgrind ./cond_init
 }}}

 but crashes with a SIGSEGV when compiled and run as:

 {{{
 gcc -Wall -fsanitize=address cond_init.c -o cond_init && ./cond_init
 }}}

 Reported this as a bug in Debian's gcc : https://bugs.debian.org/cgi-
 bin/bugreport.cgi?bug=786850

--
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10375#comment:27
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