libobjc2 on Windows with clang 13 (crash prior to main)

[David Vernon]

Hello all. I’m brand new to the list. I work for Keysight Technologies on 
Eggplant – a commercial project that uses gnustep for our Windows port. I’m 
having some issues, and Greg Casamento has recommended that raise them here.

We build on Windows using msys64 and clang. I am trying to upgrade clang to the 
current version (v13) and I’m pretty much stuck. I can get libobjc2 and 
lib-base to build, but when I run a very simple test app is crashes prior to 
main.

The test program:
#import <Foundation/Foundation.h>
#include "stdio.h"

#if 0

@interface Test : NSObject
@end

@implementation Test
@end

#endif

int main (void)
{
  fprintf( stderr, "Hello World\n");
  return 0;
}

Run it like this and all is good: it prints “Hello World”. Flip the #if 0 to 
#if 1, and it crashes prior to main.

Gdb shows this stack trace:
#0  0x00007ffe8b92a263 in ntdll!RtlRegisterSecureMemoryCacheCallback ()
   from C:\Windows\SYSTEM32\ntdll.dll
#1  0x00007ffe8b8ecd24 in ntdll!memset () from C:\Windows\SYSTEM32\ntdll.dll
#2  0x00007ffe8b929111 in ntdll!RtlRegisterSecureMemoryCacheCallback ()
   from C:\Windows\SYSTEM32\ntdll.dll
#3  0x00007ffe8b855cc1 in ntdll!RtlGetCurrentServiceSessionId ()
   from C:\Windows\SYSTEM32\ntdll.dll
#4  0x00007ffe8b855b74 in ntdll!RtlGetCurrentServiceSessionId ()
   from C:\Windows\SYSTEM32\ntdll.dll
#5  0x00007ffe8b8547b1 in ntdll!RtlFreeHeap ()
   from C:\Windows\SYSTEM32\ntdll.dll
#6  0x00007ffe89a99c9c in msvcrt!free () from C:\Windows\System32\msvcrt.dll
#7  0x00007ffe41ec8068 in +[GSBlock load] (self=<optimized out>,
    _cmd=<optimized out>) at GSBlocks.m:55
#8  0x00007ffe66e4281d in objc_send_load_message ()
   from C:\msys64\mingw64\bin\libobjc.dll
#9  0x00007ffe66e4356b in objc_resolve_class ()
   from C:\msys64\mingw64\bin\libobjc.dll
#10 0x00007ffe66e4366c in objc_resolve_class_links ()
   from C:\msys64\mingw64\bin\libobjc.dll
#11 0x00007ffe66e47e47 in __objc_exec_class ()
   from C:\msys64\mingw64\bin\libobjc.dll
#12 0x00007ffe41ec80d0 in objc_load_function ()
   from C:\msys64\mingw64\GNUstep\System\Tools\gnustep-base-1_28.dll
#13 0x00007ffe4209b9d2 in __do_global_ctors ()
    at C:/M/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/gccmain.c:44
#14 0x00007ffe41ec1233 in __DllMainCRTStartup (hDllHandle=0x7ffe41ec0000,
    dwReason=1, lpreserved=0x12f5ef750)
    at C:/M/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/crtdll.c:184
#15 0x00007ffe8b849a1d in ntdll!RtlActivateActivationContextUnsafeFast ()
   from C:\Windows\SYSTEM32\ntdll.dll
#16 0x00007ffe8b89c1e7 in ntdll!LdrGetProcedureAddressEx ()
   from C:\Windows\SYSTEM32\ntdll.dll
#17 0x00007ffe8b89bf7a in ntdll!LdrGetProcedureAddressEx ()
   from C:\Windows\SYSTEM32\ntdll.dll
#18 0x00007ffe8b89c000 in ntdll!LdrGetProcedureAddressEx ()
   from C:\Windows\SYSTEM32\ntdll.dll
#19 0x00007ffe8b903c2a in ntdll!LdrInitShimEngineDynamic ()
   from C:\Windows\SYSTEM32\ntdll.dll
#20 0x00007ffe8b8a4cdb in ntdll!LdrInitializeThunk ()
   from C:\Windows\SYSTEM32\ntdll.dll
#21 0x00007ffe8b8a4b63 in ntdll!LdrInitializeThunk ()
   from C:\Windows\SYSTEM32\ntdll.dll
#22 0x00007ffe8b8a4b0e in ntdll!LdrInitializeThunk ()
   from C:\Windows\SYSTEM32\ntdll.dll
#23 0x0000000000000000 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

Any ideas as to how I might proceed would be graciously appreciated.

Dave Vernon
Keysight Technologies