[GHC] #7040: linker failures with foreign global data (was: ghci segfault on OS X X86_64 with foreign global data)

[GHC]

#7040: linker failures with foreign global data
------------------------------+---------------------------------------------
 Reporter:  luite             |          Owner:                  
     Type:  bug               |         Status:  new             
 Priority:  normal            |      Component:  Runtime System  
  Version:                    |       Keywords:                  
       Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
  Failure:  Other             |       Testcase:                  
Blockedby:                    |       Blocking:                  
  Related:                    |  
------------------------------+---------------------------------------------
Changes (by nus):

  * failure:  GHCi crash => Other
  * version:  7.4.2 =>
  * component:  Compiler => Runtime System
  * architecture:  x86_64 (amd64) => Unknown/Multiple


Comment:

 This involves multiple archithectures/OS'es, changing the ticket
 properties. See the following example:

 {{{
 #include <stdio.h>
 #include "global.h"

 #if defined(__MINGW32__)
 # if defined(__MINGW64_VERSION_MAJOR) && defined(__MINGW64__)
 #    define ARR_SIZE 0x0fffffff /* works when linked by ghc, fails with
 ghci */
 /* #    define ARR_SIZE 0x1fffffff */ /* bad executable when linked by
 ghc, fails to link with ghci */
 # else
 #    define ARR_SIZE 0x1 /* this, and anything bigger fails to link with
 ghci, works with ghc */
 # endif
 #elif defined(__APPLE__)
 # if defined(__i386__)
 #    define ARR_SIZE 0x0fffffff /* works */
 /* #    define ARR_SIZE 0x1fffffff */ /* works when linked by ghc, causes
 failure in malloc at ghci run-time */
 /* #    define ARR_SIZE 0x2fffffff */ /* refused by llvm-gcc as too large
 */
 # elif defined(__x86_64__)
 #    define ARR_SIZE 0xffffffff /* works when linked by ghc, causes
 failure in malloc at ghci run-time */
 # endif
 #elif defined(__linux__)
 # if defined(__i386__)
  #    define ARR_SIZE 0x1fffffff
 /* #    define ARR_SIZE 0x2fffffff */ /* refused by gcc as too large */
 # elif defined(__x86_64__)
 /* #    define ARR_SIZE 0x1fffffff */ /* works */
 /* #    define ARR_SIZE 0x2fffffff */ /* works when linked by ghc, causes
 failure in malloc at ghci run-time */
 /* #    define ARR_SIZE 0x3fffffff */ /* SIGKILL'ed when linked by ghc,
 causes failure in malloc at ghci run-time */
 # endif
 #endif

 int x[ARR_SIZE];
 void printx() {
   printf("ARR_SIZE: %x\n", ARR_SIZE);
   x[0] = 0;
   printf("x: %d\n", x[0]);
   x[0] = 1;
   printf("x: %d\n", x[0]);
 }
 }}}
 The versions the example was tested on:
 {{{
 Windows 7 SP1 x64.
   x32:
     CC: i686-w64-mingw32-gcc-4.6.3-release-win32_rubenvb.7z
     GHC: ghc-7.4.1-i386-windows.exe
   x64:
     CC: x86_64-w64-mingw32-gcc-4.6.3-release-win64_rubenvb.7z
     GHC: ghc-7.5.20120617-i386-windows.exe; HEAD("Project
 version","7.5.20120705")("Booter version","7.5.20120617")
 }}}

 {{{
 Mac OS X 10.7.3.
   x32:
     CC: gcc -m32 (i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on
 Apple Inc. build 5658) (LLVM build 2336.9.00))
     GHC: ghc-7.4.2-i386-apple-darwin.tar.bz2
   x64:
     CC: gcc (i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple
 Inc. build 5658) (LLVM build 2336.9.00))
     GHC: ghc-7.4.2-x86_64-apple-darwin.tar.bz2
 }}}
 {{{
 Linux Ubuntu 12.04 LTS x64.
   x32:
     CC: gcc -m32 (gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3)
     GHC: ghc-7.4.2-i386-unknown-linux.tar.bz2
   x64:
     CC: gcc (gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3)
     GHC: ghc-7.4.2-x86_64-unknown-linux.tar.bz2
 }}}

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7040#comment:8>
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