Article: Q216716
Product(s): Microsoft C Compiler
Version(s): winnt:6.0
Operating System(s):
Keyword(s): kbservicepack kbCompiler kbCPPonly kbVC600bug kbVC600fix kbVS600sp2 kbVS600SP1 kbVS600s
Last Modified: 07-MAY-2001
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The information in this article applies to:
- Microsoft Visual C++, 32-bit Enterprise Edition, version 6.0
- Microsoft Visual C++, 32-bit Professional Edition, version 6.0
- Microsoft Visual C++, 32-bit Learning Edition, version 6.0
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SYMPTOMS
========
Relocations are not generated for typdefed pointers (or arrays) to a typedef of
a function pointer. This leads some pointers to incorrect locations.
RESOLUTION
==========
Two levels of typedef's are required to encounter this bug. One workaround is to
use only one typedef to alias the pointer to function type.
STATUS
======
Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.
This bug was corrected in Visual Studio 6.0 Service Pack 3. For more information
about Visual Studio service packs, please see the following articles in the
Microsoft Knowledge Base:
Q194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why
Q194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed
MORE INFORMATION
================
Steps to Reproduce Behavior
---------------------------
#include <stdio.h>
struct S{
int m_x;
int m_y;
};
S f() {
return S();
}
typedef S (Func_t)();
typedef Func_t *pFunc_t;
typedef int (* PFUNC)();
pFunc_t pFunc1 = &f;
PFUNC * ppFunc1 = reinterpret_cast<PFUNC *>( &pFunc1 );
pFunc_t pFunc2 = 0;
PFUNC * ppFunc2 = reinterpret_cast<PFUNC *>( &pFunc2 );
int main()
{
pFunc_t pFunc3 = &f;
PFUNC * ppFunc3 = reinterpret_cast<PFUNC *>( &pFunc3 );
pFunc_t pFunc4 = 0;
PFUNC * ppFunc4 = reinterpret_cast<PFUNC *>( &pFunc4 );
printf("pFunc1 = 0x%08x\n", pFunc1);
printf("ppFunc1 = 0x%08x\n", ppFunc1);
printf("pFunc2 = 0x%08x\n", pFunc2);
printf("ppFunc2 = 0x%08x\n", ppFunc2);
printf("pFunc3 = 0x%08x\n", pFunc3);
printf("ppFunc3 = 0x%08x\n", ppFunc3);
printf("pFunc4 = 0x%08x\n", pFunc4);
printf("ppFunc4 = 0x%08x\n", ppFunc4);
return 0;
}
The addresses in the following output may vary:
pFunc1 = 0x00401005
ppFunc1 = 0x00401005
pFunc2 = 0x00000000
ppFunc2 = 0x00000000 Shouldn't be 0
pFunc3 = 0x00401005
ppFunc3 = 0x00401005
pFunc4 = 0x00000000
ppFunc4 = 0x00000000 Shouldn't be 0
Additional query words:
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Keywords : kbservicepack kbCompiler kbCPPonly kbVC600bug kbVC600fix kbVS600sp2 kbVS600SP1 kbVS600sp3fix
Technology : kbVCsearch kbAudDeveloper kbVC600 kbVC32bitSearch
Version : winnt:6.0
Issue type : kbbug
Solution Type : kbfix
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