[1.876] Get an exeption with this code...

IceSoft · **Posted:** Wed May 28, 2008 1:43 pm

Tailbite this code:

Code:

ProcedureDLL ATEST_Init()

EndProcedure

ProcedureDLL ATEST_End()

EndProcedure

ProcedureDLL ATEST()
  text.s = "Working"
  MessageRequester("Tailbite Tester", text)
EndProcedure

After tailbiing and restart of the compiler run this short example:

Code:

ATEST()

gnozal · **Posted:** Wed May 28, 2008 1:54 pm

No problem here (NT4 and XP, with or without debugger).
Using latest jaPBe V3.

IceSoft · **Posted:** Wed May 28, 2008 7:11 pm

Tried it on my home PC again.
I got also an error there:

Code:

Unhandled exception at 0x7c9200c8 in PureBasic_Compilation1.exe: 0xC0000005: Access violation reading location 0x00000010.

Here are the diassembly too:

Code:

7C91FFC3  mov         al,byte ptr [esi+5] 
7C91FFC6  test        al,0E0h 
7C91FFC8  jne         7C9207D2 
7C91FFCE  cmp         byte ptr [edi+586h],1 
7C91FFD5  jne         7C9212C2 
7C91FFDB  mov         ecx,dword ptr [edi+580h] 
7C91FFE1  test        ecx,ecx 
7C91FFE3  je          7C9207D2 
7C91FFE9  cmp         word ptr [edi+584h],0 
7C91FFF1  jne         7C9207D2 
7C91FFF7  test        al,8 
7C91FFF9  jne         7C9207D2 
7C91FFFF  movzx       eax,word ptr [esi] 
7C920002  mov         dword ptr [ebp-1Ch],eax 
7C920005  cmp         eax,80h 
7C92000A  jae         7C9207D2 
7C920010  push        dword ptr [ebp+10h] 
7C920013  lea         eax,[eax+eax*2] 
7C920016  shl         eax,4 
7C920019  add         eax,ecx 
7C92001B  push        eax  
7C92001C  call        7C920072 
7C920021  test        al,al 
7C920023  je          7C9207D2 
7C920029  test        byte ptr ds:[7FFE02F0h],2 
7C920030  jne         7C94B59D 
7C920036  mov         al,1 
7C920038  call        7C91E8E6 
7C92003D  ret         0Ch  
7C920040  db          ffh  
7C920041  db          ffh  
7C920042  db          ffh  
7C920043  call        dword ptr ds:[1E7C94B7h] 
7C920049  mov         bh,94h 
7C92004B  jl          7C92004C 
7C92004D  db          ffh  
7C92004E  db          ffh  
7C92004F  inc         dword ptr [eax] 
7C920051  add         byte ptr [eax],al 
7C920053  add         byte ptr [edx-4Ah],ah 
7C920056  xchg        eax,esp 
7C920057  jl          7C91FFE9 
7C920059  nop              
7C92005A  nop              
7C92005B  nop              
7C92005C  nop              
7C92005D  mov         edi,edi 
7C92005F  push        ebp  
7C920060  mov         ebp,esp 
7C920062  mov         eax,dword ptr [ebp+8] 
7C920065  mov         ax,word ptr [eax+4] 
7C920069  pop         ebp  
7C92006A  ret         4    
7C92006D  nop              
7C92006E  nop              
7C92006F  nop              
7C920070  nop              
7C920071  nop              
7C920072  mov         edi,edi 
7C920074  push        ebp  
7C920075  mov         ebp,esp 
7C920077  push        esi  
7C920078  mov         esi,dword ptr [ebp+8] 
7C92007B  inc         dword ptr [esi+14h] 
7C92007E  push        esi  
7C92007F  call        7C92005D 
7C920084  cmp         ax,word ptr [esi+8] 
7C920088  jae         7C920B1C 
7C92008E  mov         edx,dword ptr [ebp+0Ch] 
7C920091  mov         ecx,esi 
7C920093  call        7C912AB0 
7C920098  mov         al,1 
7C92009A  pop         esi  
7C92009B  pop         ebp  
7C92009C  ret         8    
7C92009F  nop              
7C9200A0  nop              
7C9200A1  nop              
7C9200A2  nop              
7C9200A3  nop              
7C9200A4  push        204h 
7C9200A9  push        7C9201C0h 
7C9200AE  call        7C91E8AB 
7C9200B3  mov         ebx,dword ptr [ebp+8] 
7C9200B6  mov         dword ptr [ebp-1Ch],ebx 
7C9200B9  xor         edi,edi 
7C9200BB  mov         dword ptr [ebp-30h],edi 
7C9200BE  mov         byte ptr [ebp-1Eh],0 
7C9200C2  mov         dword ptr [ebp-34h],edi 
7C9200C5  mov         eax,dword ptr [ebp+0Ch] 
7C9200C8  or          eax,dword ptr [ebx+10h] << EXEPTION raised here!

Hint:
This was always a fresh tailbite installation.
Tailbite settings are the default one.[/code]

ABBKlaus · **Posted:** Wed May 28, 2008 11:06 pm

No crash here either. WinXP SP3.

Are you using any subsystem or unicode mode ?

IceSoft · **Posted:** Thu May 29, 2008 6:04 am

ABBKlaus wrote:

Are you using any subsystem or unicode mode ?

No.

More hints:
Crash is raising only in 'Release' mode.
Works correct with 'Debugger is on'.

It works iF I remove the both 'default' Procedures (Init and End):
ProcedureDLL ATEST_Init()
ProcedureDLL ATEST_End()

ABBKlaus · **Posted:** Thu May 29, 2008 8:06 am

The string manager does not get imported.

This works :

Code:

A$="" ; this includes the correct StringManager (StringManager.lib/StringManagerThread.lib/StringManagerThreadUnicode.lib/StringManagerUnicode.lib)
ATEST()

Here is the PureBasic generated asm code :

Code:

; 
; PureBasic 4.20 (Windows - x86) generated code
; 
; (c) 2008 Fantaisie Software
; 
; The header must remain intact for Re-Assembly
; 
; Requester
; FileSystem
; Date
; Object
; SimpleList
; :System
; KERNEL32
; :Import
; 
format MS COFF
; 
extrn _ExitProcess@4
extrn _GetModuleHandleA@4
extrn _HeapCreate@12
extrn _HeapDestroy@4
; 
extrn _PB_FreeSimpleLists@0
extrn _PB_InitRequester@0
extrn _PB_InitSimpleList@0
extrn _PB_MessageRequester@8
extrn _memset
extrn SYS_FastAllocateStringFree
extrn _SYS_FreeString@4
extrn _PB_StringBase
extrn PB_StringBase
extrn _SYS_InitString@0
; 
extrn _PB_StringBasePosition
public _PB_Instance
public _PB_ExecutableType
public _PB_MemoryBase
public PB_Instance
public PB_MemoryBase
public _PB_EndFunctions
public _PB_DEBUGGER_LineNumber
public _PB_DEBUGGER_IncludedFiles

macro pb_public symbol
{
  public  _#symbol
  public symbol
_#symbol:
symbol:
}

macro    pb_align value { rb (value-1) - ($-_PB_DataSection + value-1) mod value }
macro pb_bssalign value { rb (value-1) - ($-_PB_BSSSection  + value-1) mod value }
public PureBasicStart
; 
section '.code' code readable executable
; 
; 
PureBasicStart:
; 
  PUSH   dword I_BSSEnd-I_BSSStart
  PUSH   dword 0
  PUSH   dword I_BSSStart
  CALL  _memset
  ADD    esp,12
  PUSH   dword 0
  CALL  _GetModuleHandleA@4
  MOV    [_PB_Instance],eax
  PUSH   dword 0
  PUSH   dword 4096
  PUSH   dword 0
  CALL  _HeapCreate@12
  MOV    [PB_MemoryBase],eax
  CALL  _SYS_InitString@0
  CALL  _PB_InitSimpleList@0
  CALL  _PB_InitRequester@0
; :
; ProcedureDLL ATEST_Init() 
macro MP0{
_Procedure0:
  PS0=4                                                                                                                                                                                                                                                     
; 
; EndProcedure 
  XOR    eax,eax
_EndProcedure1:
  RET
}
; 
; ProcedureDLL ATEST_End() 
macro MP2{
_Procedure2:
  PS2=4                                                                                                                                                                                                                                                     
; 
; EndProcedure 
  XOR    eax,eax
_EndProcedure3:
  RET
}
; 
; ProcedureDLL ATEST() 
macro MP4{
_Procedure4:
  PS4=8
  XOR    eax,eax
  PUSH   eax                                                                                                                                                                                                                             
; text.s = "Working" 
  MOV    edx,_S1
  LEA    ecx,[esp]
  CALL   SYS_FastAllocateStringFree
; MessageRequester("Tailbite Tester", text) 
  PUSH   dword [esp]
  PUSH   dword _S2
  CALL  _PB_MessageRequester@8
; EndProcedure 
  XOR    eax,eax
_EndProcedure5:
  PUSH   dword [esp]
  CALL  _SYS_FreeString@4
  ADD    esp,4
  RET
}
; 
_PB_EOP_NoValue:
  PUSH   dword 0
_PB_EOP:
  CALL  _PB_EndFunctions
  PUSH   dword [PB_MemoryBase]
  CALL  _HeapDestroy@4
  CALL  _ExitProcess@4
_PB_EndFunctions:
  CALL  _PB_FreeSimpleLists@0
  RET
; 
MP4
MP2
MP0
; 
section '.data' data readable writeable
; 
_PB_DataSection:
_PB_DEBUGGER_LineNumber: dd -1
_PB_DEBUGGER_IncludedFiles: dd 0
_PB_ExecutableType: dd 0
public _SYS_StaticStringStart
_SYS_StaticStringStart:
_S2: db "Tailbite Tester",0
_S1: db "Working",0
pb_public PB_NullString
  db     0
public _SYS_StaticStringEnd
_SYS_StaticStringEnd:
align 4
align 4
s_s:
  dd     0
  dd     -1
align 4
; 
section '.bss' readable writeable
_PB_BSSSection:
align 4
; 
I_BSSStart:
_PB_MemoryBase:
PB_MemoryBase: rd 1
_PB_Instance:
PB_Instance: rd 1
; 
align 4
PB_DataPointer rd 1
align 4
align 4
align 4
align 4
I_BSSEnd:
section '.data' data readable writeable
SYS_EndDataSection:

IceSoft · **Posted:** Thu May 29, 2008 8:41 am

Code:

Import "StringManager.lib" 
EndImport 
ATEST()

Yes this is working now. Thanks.

But here the next problem:

Please add the 'static' in front of the line 'text.s = "Nativ".
The messagebox has an empty text now.
Example:

Code:

Static text.s = "Nativ"

ABBKlaus · **Posted:** Thu May 29, 2008 9:00 am

Its unsupported for now. You can use a global instead :

Code:

Global ATEST_text.s

ProcedureDLL ATEST_Init() 
  ATEST_text = "Working" 
EndProcedure 

ProcedureDLL ATEST_End() 

EndProcedure 

ProcedureDLL ATEST() 
  MessageRequester("Tailbite Tester", ATEST_text)
EndProcedure 

The so called 'PureBasicStart:' is not evaluated by TailBite. And the variable test is not initialised.

Code:

PureBasicStart:
; 
  PUSH   dword I_BSSEnd-I_BSSStart
  PUSH   dword 0
  PUSH   dword I_BSSStart
  CALL  _memset
  ADD    esp,12
  PUSH   dword 0
  CALL  _GetModuleHandleA@4
  MOV    [_PB_Instance],eax
  PUSH   dword 0
  PUSH   dword 4096
  PUSH   dword 0
  CALL  _HeapCreate@12
  MOV    [PB_MemoryBase],eax
  CALL  _SYS_InitString@0
  CALL  _PB_InitSimpleList@0
  CALL  _PB_InitRequester@0
  MOV    edx,_S1                  ; <- Static variable gets initialized here
  MOV    ecx,s_ATEST.v_text       ;
  CALL   SYS_FastAllocateString   ;
; :

...

_S1: db "Nativ",0

...

IceSoft · **Posted:** Thu May 29, 2008 9:25 am

ABBKlaus wrote:

Its unsupported for now. You have to use this instead :

Code:

ProcedureDLL ATEST() 
  Static text.s
  If Not text:text = "Nativ":EndIf
  MessageRequester("Tailbite Tester", text) 
EndProcedure 

Initializing of a static string variable is no longer supported?
Thats not acceptable. It works correct if I use it as a procedure:

Code:

Procedure ATEST1() 
  Static text.s = "Value: "
  Static counter.l = 2

  text + Str(counter)
  MessageRequester("Tailbite Tester", text) 
EndProcedure 

ATEST1()
ATEST1()
ATEST1()
ATEST1()
ATEST1()

ABBKlaus · **Posted:** Thu May 29, 2008 11:33 am

Its a TailBite issue, you never have problems in a PureBasic program (Except PB4.02) !

PureBasic Forum

[1.876] Get an exeption with this code...

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