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Carlo Kok via llvm-dev

2018-Aug-20 14:00 UTC

[llvm-dev] Windows "0xC00001A5: An invalid exception handler routine has been detected" with LLVM win32 (i386) SEH code

Hi,

I'm getting:

Unhandled exception at 0x00C211F0 in ConsoleApplication830.exe: 0xC00001A5: An
invalid exception handler routine has been detected (parameters: 0x00000001).

With some fairly simple SEH enabled routine:

define i32
@__elements_entry_point_main(%._gt2a_RemObjects_d_Elements_d_System_d_Array_t_1s*)
#0 personality i8* bitcast (i32 ()* @_elements_exception_handler to i8*) !dbg
!61 {
BasicBlock0:
  %1 = alloca %._gt2a_RemObjects_d_Elements_d_System_d_Array_t_1s*
  store %._gt2a_RemObjects_d_Elements_d_System_d_Array_t_1s* %0,
%._gt2a_RemObjects_d_Elements_d_System_d_Array_t_1s** %1
  call void @llvm.dbg.declare(metadata
%._gt2a_RemObjects_d_Elements_d_System_d_Array_t_1s** %1, metadata !86, metadata
!DIExpression()), !dbg !88
  %csLoc0 = alloca i32, !dbg !88
  store i32 0, i32* %csLoc0, !dbg !88
  br label %BasicBlock1, !dbg !88

BasicBlock1:                                      ; preds = %BasicBlock0
  call void @llvm.dbg.declare(metadata i32* %csLoc0, metadata !89, metadata
!DIExpression()), !dbg !91
  store i32 0, i32* %csLoc0, !dbg !91
  invoke void @ms_t1d_ConsoleApplication4_d_Program2_m1()
          to label %BasicBlock2 unwind label %2, !dbg !92

BasicBlock2:                                      ; preds = %BasicBlock1
  br label %BasicBlock3, !dbg !93

; <label>:2:                                      ; preds = %BasicBlock1
  %3 = catchswitch within none [label %BasicBlock4] unwind to caller, !dbg !93

BasicBlock3:                                      ; preds = %BasicBlock5,
%BasicBlock2
  %4 = load i32, i32* %csLoc0, !dbg !94
  ret i32 %4, !dbg !94

BasicBlock4:                                      ; preds = %2
  %5 = catchpad within %3 [{ i8*, i8* }* @0, i32 0, i8* null], !dbg !93
  catchret from %5 to label %BasicBlock5, !dbg !95

BasicBlock5:                                      ; preds = %BasicBlock4
  br label %BasicBlock3, !dbg !95

BasicBlock6:                                      ; No predecessors!
  unreachable, !dbg !94
}


(_elements_exception_handler  is my exception handler routine which I added to
the LLVM source, compatible with the standard VC++ one). My question is,

is there something special I need to do to make SEH work (I'm using LLVM LLD
to compile it, from 3 months ago, but latest doesn't give a different
result)? I can't find anything real about that exception code.

0x00C211F0  DOES point to the generated code used for SEH:

00C211F0 | 57                       | push edi                                  
|
00C211F1 | 56                       | push esi                                  
|
00C211F2 | 83EC 10                  | sub esp,10                                
|
00C211F5 | 8B4424 28                | mov eax,dword ptr ss:[esp+28]             
|
00C211F9 | 8B4C24 24                | mov ecx,dword ptr ss:[esp+24]             
|
00C211FD | 8B5424 20                | mov edx,dword ptr ss:[esp+20]             
|
00C21201 | 8B7424 1C                | mov esi,dword ptr ss:[esp+1C]             
|
00C21205 | BF 54DCC800              | mov edi,consoleapplication830.C8DC54      
|
00C2120A | 894424 0C                | mov dword ptr ss:[esp+C],eax              
|
00C2120E | 89F8                     | mov eax,edi                               
|
00C21210 | 897424 08                | mov dword ptr ss:[esp+8],esi              
|
00C21214 | 894C24 04                | mov dword ptr ss:[esp+4],ecx              
|
00C21218 | 891424                   | mov dword ptr ss:[esp],edx                
|
00C2121B | 83C4 10                  | add esp,10                                
|
00C2121E | 5E                       | pop esi                                   
|
00C2121F | 5F                       | pop edi                                   
|
00C21220 | E9 7B270100              | jmp
<consoleapplication830.RemObjects.Elements.System.Exte |

Which seems fine.

Reid Kleckner via llvm-dev

2018-Aug-20 16:46 UTC

head link

[llvm-dev] Windows "0xC00001A5: An invalid exception handler routine has been detected" with LLVM win32 (i386) SEH code

This is 32-bit x86, right? Sounds like the exception handler did not appear
in the /safeseh table.

If you emit a standalone .s file, do you see something like `.safeseh
_elements_exception_handler` somewhere in there? If not, that's a problem.
I think it would also be a problem if  _elements_exception_handler is
imported. If so, try making a thunk for it.

You can also try running `dumpbin /loadconfig` (or equivalently
llvm-readobj -coff-load-config) on your binary to confirm that the RVA of
_elements_exception_handler appears in the safe seh table.

On Mon, Aug 20, 2018 at 7:00 AM Carlo Kok via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Hi,
>
> I'm getting:
>
> Unhandled exception at 0x00C211F0 in ConsoleApplication830.exe:
> 0xC00001A5: An invalid exception handler routine has been detected
> (parameters: 0x00000001).
>
> With some fairly simple SEH enabled routine:
>
> define i32
>
@__elements_entry_point_main(%._gt2a_RemObjects_d_Elements_d_System_d_Array_t_1s*)
> #0 personality i8* bitcast (i32 ()* @_elements_exception_handler to i8*)
> !dbg !61 {
> BasicBlock0:
>   %1 = alloca %._gt2a_RemObjects_d_Elements_d_System_d_Array_t_1s*
>   store %._gt2a_RemObjects_d_Elements_d_System_d_Array_t_1s* %0,
> %._gt2a_RemObjects_d_Elements_d_System_d_Array_t_1s** %1
>   call void @llvm.dbg.declare(metadata
> %._gt2a_RemObjects_d_Elements_d_System_d_Array_t_1s** %1, metadata !86,
> metadata !DIExpression()), !dbg !88
>   %csLoc0 = alloca i32, !dbg !88
>   store i32 0, i32* %csLoc0, !dbg !88
>   br label %BasicBlock1, !dbg !88
>
> BasicBlock1:                                      ; preds = %BasicBlock0
>   call void @llvm.dbg.declare(metadata i32* %csLoc0, metadata !89,
> metadata !DIExpression()), !dbg !91
>   store i32 0, i32* %csLoc0, !dbg !91
>   invoke void @ms_t1d_ConsoleApplication4_d_Program2_m1()
>           to label %BasicBlock2 unwind label %2, !dbg !92
>
> BasicBlock2:                                      ; preds = %BasicBlock1
>   br label %BasicBlock3, !dbg !93
>
> ; <label>:2:                                      ; preds =
%BasicBlock1
>   %3 = catchswitch within none [label %BasicBlock4] unwind to caller, !dbg
> !93
>
> BasicBlock3:                                      ; preds = %BasicBlock5,
> %BasicBlock2
>   %4 = load i32, i32* %csLoc0, !dbg !94
>   ret i32 %4, !dbg !94
>
> BasicBlock4:                                      ; preds = %2
>   %5 = catchpad within %3 [{ i8*, i8* }* @0, i32 0, i8* null], !dbg !93
>   catchret from %5 to label %BasicBlock5, !dbg !95
>
> BasicBlock5:                                      ; preds = %BasicBlock4
>   br label %BasicBlock3, !dbg !95
>
> BasicBlock6:                                      ; No predecessors!
>   unreachable, !dbg !94
> }
>
>
> (_elements_exception_handler  is my exception handler routine which I
> added to the LLVM source, compatible with the standard VC++ one). My
> question is,
>
> is there something special I need to do to make SEH work (I'm using
LLVM
> LLD to compile it, from 3 months ago, but latest doesn't give a
different
> result)? I can't find anything real about that exception code.
>
> 0x00C211F0  DOES point to the generated code used for SEH:
>
> 00C211F0 | 57                       | push edi
>                        |
> 00C211F1 | 56                       | push esi
>                        |
> 00C211F2 | 83EC 10                  | sub esp,10
>                        |
> 00C211F5 | 8B4424 28                | mov eax,dword ptr ss:[esp+28]
>                       |
> 00C211F9 | 8B4C24 24                | mov ecx,dword ptr ss:[esp+24]
>                       |
> 00C211FD | 8B5424 20                | mov edx,dword ptr ss:[esp+20]
>                       |
> 00C21201 | 8B7424 1C                | mov esi,dword ptr ss:[esp+1C]
>                       |
> 00C21205 | BF 54DCC800              | mov
> edi,consoleapplication830.C8DC54                       |
> 00C2120A | 894424 0C                | mov dword ptr ss:[esp+C],eax
>                        |
> 00C2120E | 89F8                     | mov eax,edi
>                       |
> 00C21210 | 897424 08                | mov dword ptr ss:[esp+8],esi
>                        |
> 00C21214 | 894C24 04                | mov dword ptr ss:[esp+4],ecx
>                        |
> 00C21218 | 891424                   | mov dword ptr ss:[esp],edx
>                        |
> 00C2121B | 83C4 10                  | add esp,10
>                        |
> 00C2121E | 5E                       | pop esi
>                       |
> 00C2121F | 5F                       | pop edi
>                       |
> 00C21220 | E9 7B270100              | jmp
> <consoleapplication830.RemObjects.Elements.System.Exte |
>
> Which seems fine.
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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Carlo Kok via llvm-dev

2018-Aug-20 18:04 UTC

head link

[llvm-dev] Windows "0xC00001A5: An invalid exception handler routine has been detected" with LLVM win32 (i386) SEH code

Indeed, it's 32bits x86 and there's no .safeseh or anything like it,
even readobj -coff-load-config says nothing:
File: ConsoleApplication830.exe
Format: COFF-i386
Arch: i386
AddressSize: 32bit


Now I know what to look for, thanks!


On Mon, Aug 20, 2018, at 18:46, Reid Kleckner wrote:> This is 32-bit x86, right? Sounds like the exception handler did not
> appear in the /safeseh table.> 
> If you emit a standalone .s file, do you see something like
> `.safeseh   _elements_exception_handler` somewhere in there? If
> not, that's a problem. I think it would also be a problem if
> _elements_exception_handler is imported. If so, try making a
> thunk for it.> 
> You can also try running `dumpbin /loadconfig` (or equivalently llvm-
> readobj -coff-load-config) on your binary to confirm that the RVA of
> _elements_exception_handler appears in the safe seh table.> 
> On Mon, Aug 20, 2018 at 7:00 AM Carlo Kok via llvm-dev <llvm-
> dev at lists.llvm.org> wrote:>> Hi,
>> 
>>  I'm getting:
>> 
>>  Unhandled exception at 0x00C211F0 in ConsoleApplication830.exe:
>>  0xC00001A5: An invalid exception handler routine has been detected
>>  (parameters: 0x00000001).>> 
>>  With some fairly simple SEH enabled routine:
>> 
>>  define i32 @__elements_entry_point_main(%._gt2a_RemObjects_d_Elemen-
>>  ts_d_System_d_Array_t_1s*) #0 personality i8* bitcast (i32 ()*
>>  @_elements_exception_handler to i8*) !dbg !61 {>>  BasicBlock0:
>>    %1 = alloca %._gt2a_RemObjects_d_Elements_d_System_d_Array_t_1s*
>>    store %._gt2a_RemObjects_d_Elements_d_System_d_Array_t_1s* %0,
>>    %._gt2a_RemObjects_d_Elements_d_System_d_Array_t_1s** %1>>   
call void @llvm.dbg.declare(metadata
>>    %._gt2a_RemObjects_d_Elements_d_System_d_Array_t_1s** %1, metadata
>>    !86, metadata !DIExpression()), !dbg !88>>    %csLoc0 = alloca
i32, !dbg !88
>>    store i32 0, i32* %csLoc0, !dbg !88
>>    br label %BasicBlock1, !dbg !88
>> 
>>  BasicBlock1:                                      ; preds >> 
%BasicBlock0>>    call void @llvm.dbg.declare(metadata i32* %csLoc0,
metadata !89,
>>    metadata !DIExpression()), !dbg !91>>    store i32 0, i32*
%csLoc0, !dbg !91
>>    invoke void @ms_t1d_ConsoleApplication4_d_Program2_m1()
>>            to label %BasicBlock2 unwind label %2, !dbg !92
>> 
>>  BasicBlock2:                                      ; preds >> 
%BasicBlock1>>    br label %BasicBlock3, !dbg !93
>> 
>>  ; <label>:2:                                      ; preds
>>  ; %BasicBlock1>>    %3 = catchswitch within none [label
%BasicBlock4] unwind to
>>    %caller, !dbg !93>> 
>>  BasicBlock3:                                      ; preds >> 
%BasicBlock5, %BasicBlock2>>    %4 = load i32, i32* %csLoc0, !dbg !94
>>    ret i32 %4, !dbg !94
>> 
>>  BasicBlock4:                                      ; preds = %2
>>    %5 = catchpad within %3 [{ i8*, i8* }* @0, i32 0, i8* null], !dbg
>>    %!93>>    catchret from %5 to label %BasicBlock5, !dbg !95
>> 
>>  BasicBlock5:                                      ; preds >> 
%BasicBlock4>>    br label %BasicBlock3, !dbg !95
>> 
>>  BasicBlock6:                                      ; No
predecessors!>>    unreachable, !dbg !94
>>  }
>> 
>> 
>>  (_elements_exception_handler  is my exception handler routine which
>>  I added to the LLVM source, compatible with the standard VC++ one).
>>  My question is,>> 
>>  is there something special I need to do to make SEH work (I'm
using
>>  LLVM LLD to compile it, from 3 months ago, but latest doesn't give
>>  a different result)? I can't find anything real about that
>>  exception code.>> 
>>  0x00C211F0  DOES point to the generated code used for SEH:
>> 
>>  00C211F0 | 57                       | push edi
>>  |>>  00C211F1 | 56                       | push esi
>>  |>>  00C211F2 | 83EC 10                  | sub esp,10
>>  |>>  00C211F5 | 8B4424 28                | mov eax,dword ptr
>>  ss:[esp+28]                              |>>  00C211F9 | 8B4C24
24                | mov ecx,dword ptr
>>  ss:[esp+24]                              |>>  00C211FD | 8B5424
20                | mov edx,dword ptr
>>  ss:[esp+20]                              |>>  00C21201 | 8B7424
1C                | mov esi,dword ptr
>>  ss:[esp+1C]                              |>>  00C21205 | BF
54DCC800              | mov
>>  edi,consoleapplication830.C8DC54                       |>> 
00C2120A | 894424 0C                | mov dword ptr
>>  ss:[esp+C],eax                               |>>  00C2120E |
89F8                     | mov eax,edi
>>  |>>  00C21210 | 897424 08                | mov dword ptr
>>  ss:[esp+8],esi                               |>>  00C21214 |
894C24 04                | mov dword ptr
>>  ss:[esp+4],ecx                               |>>  00C21218 |
891424                   | mov dword ptr
>>  ss:[esp],edx                                 |>>  00C2121B |
83C4 10                  | add esp,10
>>  |>>  00C2121E | 5E                       | pop esi
>>  |>>  00C2121F | 5F                       | pop edi
>>  |>>  00C21220 | E9 7B270100              | jmp
>>  <consoleapplication830.RemObjects.Elements.System.Exte |>> 
>>  Which seems fine.
>>  _______________________________________________
>>  LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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