C++ RTTI in a Windows 64-bit VectoredExceptionHandler, MS Visual Studio 2015
I'm working on small Windows Exception handling engine trying to gather maximum information from the system, including C++ exceptions RTTI.
In a 32-bit VectoredExceptionHandler compiled by MSVS 2015, I successfully can obtain std::type_info pointer to RTTI of the type being thrown. It can easily be found in ((_ThrowInfo*) ExceptionPointers->ExceptionRecord->ExceptionInformation[2])->pCatchableTypeArray->arrayOfCatchableTypes[0] (see classic article of Raymond Chen, some definitions from MS's ehdata.h file and many others). This method is based on fetching pCatchableTypeArray member of MSVC built-in _ThrowInfo structure data which is built by the compiler.
But in 64-bit environment, _ThrowInfo contains no direct RTTI: unfortunately, pCatchableTypeArray is NULL. In disassembly window, I see that it is NULL even before a call to _CxxThrowException, main MS throw-handler. I searched through a number of articles concerning new 64-bit exception-handling mechanism used in MSVC, but there is no information on RTTI. But maybe I missed something.
Are there any ways to obtain std::type_info (or simply type name) of the C++ exception being thrown in a vectored exception handler working in 64-bit MSVC environment?
Here's the output of dumping 32-bit and 64-bit exception info:
32-bit (RTTI success):
VectoredExceptionHandler(): Start
exc->ExceptionCode = 0xE06D7363
exc->ExceptionAddress = 0x74E2C54F
exc->NumberParameters = 3
exc->ExceptionInformation[0] = 0x19930520 (sig)
exc->ExceptionInformation[1] = 0x004FFD9C (object)
exc->ExceptionInformation[2] = 0x003AD85C (throwInfo)
exc->ExceptionInformation[3] = 0x005B18F8 (module)
throwInfo->attributes = 0x00000000
throwInfo->pmfnUnwind = 0x00000000
throwInfo->pForwardCompat = 0x00000000
throwInfo->pCatchableTypeArray = 0x003AD870
object = 0x004FFD9C
throwInfo = 0x003AD85C
module = 0x00000000
throwInfo->pCatchableTypeArray = 0x003AD870
cArray = 0x003AD870
cArray->arrayOfCatchableTypes[0] = 0x003AD878
cType = 0x003AD878
cType->pType = 0x003AFA70
type = 0x003AFA70
type->name() = "struct `int __cdecl main(void)'::`2'::meow_exception"
cType->sizeOrOffset = 4
VectoredExceptionHandler(): End
main(): catch (meow_exception { 3 })
64-bit (RTTI failure)
VectoredExceptionHandler(): Start
exc->ExceptionCode = 0xE06D7363
exc->ExceptionAddress = 0x000007FEFCE0A06D
exc->NumberParameters = 4
exc->ExceptionInformation[0] = 0x0000000019930520 (sig)
exc->ExceptionInformation[1] = 0x000000000025FBE0 (object)
exc->ExceptionInformation[2] = 0x000000013FC52AB0 (throwInfo)
exc->ExceptionInformation[3] = 0x000000013FBE0000 (module)
module = 0x000000013FBE0000
throwInfo->attributes = 0x00000000
throwInfo->pmfnUnwind = 0x0000000000000000
throwInfo->pForwardCompat = 0x0000000000072AD0
throwInfo->pCatchableTypeArray = 0x0000000000000000
VectoredExceptionHandler(): End
main(): catch (meow_exception { 3 })
The code used to get these dumps:
#include <stdio.h>
#include <typeinfo>
#include <windows.h>
//--------------------------------------------------------------------------------------------------
const unsigned EXCEPTION_CPP_MICROSOFT = 0xE06D7363, // '?msc'
EXCEPTION_CPP_MICROSOFT_EH_MAGIC_NUMBER1 = 0x19930520, // '?msc' version magic, see ehdata.h
EXCEPTION_OUTPUT_DEBUG_STRING = 0x40010006, // OutputDebugString() call
EXCEPTION_THREAD_NAME = 0x406D1388; // Passing name of thread to the debugger
void OutputDebugPrintf (const char* format, ...);
//--------------------------------------------------------------------------------------------------
long WINAPI VectoredExceptionHandler (EXCEPTION_POINTERS* pointers)
{
const EXCEPTION_RECORD* exc = pointers->ExceptionRecord;
if (exc->ExceptionCode == EXCEPTION_OUTPUT_DEBUG_STRING ||
exc->ExceptionCode == EXCEPTION_THREAD_NAME)
return EXCEPTION_CONTINUE_SEARCH;
OutputDebugPrintf ("\n%s(): Start\n\n", __func__);
OutputDebugPrintf ("exc->ExceptionCode = 0x%X\n", exc->ExceptionCode);
OutputDebugPrintf ("exc->ExceptionAddress = 0x%p\n", exc->ExceptionAddress);
if (exc->ExceptionInformation[0] == EXCEPTION_CPP_MICROSOFT_EH_MAGIC_NUMBER1 &&
exc->NumberParameters >= 3)
{
OutputDebugPrintf ("exc->NumberParameters = %u\n", exc->NumberParameters);
OutputDebugPrintf ("exc->ExceptionInformation[0] = 0x%p (sig)\n", (void*) exc->ExceptionInformation[0]);
OutputDebugPrintf ("exc->ExceptionInformation[1] = 0x%p (object)\n", (void*) exc->ExceptionInformation[1]);
OutputDebugPrintf ("exc->ExceptionInformation[2] = 0x%p (throwInfo)\n", (void*) exc->ExceptionInformation[2]);
OutputDebugPrintf ("exc->ExceptionInformation[3] = 0x%p (module)\n", (void*) exc->ExceptionInformation[3]);
OutputDebugPrintf ("\n");
HMODULE module = (exc->NumberParameters >= 4)? (HMODULE) exc->ExceptionInformation[3] : NULL;
if (module)
{
OutputDebugPrintf ("module = 0x%p\n", module);
OutputDebugPrintf ("\n");
}
const _ThrowInfo* throwInfo = (const _ThrowInfo*) exc->ExceptionInformation[2];
if (throwInfo)
{
OutputDebugPrintf ("throwInfo->attributes = 0x%08X\n", throwInfo->attributes);
OutputDebugPrintf ("throwInfo->pmfnUnwind = 0x%p\n", throwInfo->pmfnUnwind);
OutputDebugPrintf ("throwInfo->pForwardCompat = 0x%p\n", throwInfo->pForwardCompat);
OutputDebugPrintf ("throwInfo->pCatchableTypeArray = 0x%p\n", throwInfo->pCatchableTypeArray);
OutputDebugPrintf ("\n");
}
if (throwInfo && throwInfo->pCatchableTypeArray)
{
#define RVA_TO_VA_(type, addr) ( (type) ((uintptr_t) module + (uintptr_t) (addr)) )
OutputDebugPrintf ("object = 0x%p\n", (void*) exc->ExceptionInformation[1]);
OutputDebugPrintf ("throwInfo = 0x%p\n", (void*) throwInfo);
OutputDebugPrintf ("module = 0x%p\n", (void*) module);
OutputDebugPrintf ("\n");
const _CatchableTypeArray* cArray = RVA_TO_VA_(const _CatchableTypeArray*, throwInfo->pCatchableTypeArray);
OutputDebugPrintf ("throwInfo->pCatchableTypeArray = 0x%p\n", (void*) throwInfo->pCatchableTypeArray);
OutputDebugPrintf ("cArray = 0x%p\n\n", (void*) cArray);
const _CatchableType* cType = RVA_TO_VA_(const _CatchableType*, cArray->arrayOfCatchableTypes[0]);
OutputDebugPrintf ("cArray->arrayOfCatchableTypes[0] = 0x%p\n", (void*) cArray->arrayOfCatchableTypes[0]);
OutputDebugPrintf ("cType = 0x%p\n\n", (void*) cType);
const std::type_info* type = RVA_TO_VA_(const std::type_info*, cType->pType);
OutputDebugPrintf ("cType->pType = 0x%p\n", (void*) cType->pType);
OutputDebugPrintf ("type = 0x%p\n\n", (void*) type);
OutputDebugPrintf ("type->name() = \"%s\"\n", type->name());
OutputDebugPrintf ("cType->sizeOrOffset = %zu\n\n", (size_t) cType->sizeOrOffset);
#undef RVA_TO_VA_
}
}
OutputDebugPrintf ("%s(): End\n", __func__);
return EXCEPTION_CONTINUE_SEARCH;
}
//--------------------------------------------------------------------------------------------------
void OutputDebugPrintf (const char* format, ...)
{
static char buf [1024] = "";
va_list arg; va_start (arg, format);
_vsnprintf_s (buf, sizeof (buf) - 1, _TRUNCATE, format, arg);
va_end (arg);
OutputDebugString (buf);
printf ("%s", buf);
}
//--------------------------------------------------------------------------------------------------
int main()
{
OutputDebugPrintf ("\n%s(): Start\n", __func__);
AddVectoredExceptionHandler (1, VectoredExceptionHandler);
struct meow_exception { int code = 3; };
try
{
throw meow_exception();
}
catch (const meow_exception& e)
{
OutputDebugPrintf ("\n%s(): catch (meow_exception { %d })\n", __func__, e.code);
}
catch (...)
{
OutputDebugPrintf ("\n%s(): catch (...)\n", __func__);
}
OutputDebugPrintf ("\n%s(): End\n", __func__);
return 0;
}
Build options:
// Microsoft (R) C/C++ Optimizing Compiler Version 19.00.24213.1 (part of VS 2015 SP3)
cl /c code.cpp /EHsc /W4
link code.obj kernel32.lib /machine:x86 /subsystem:console /debug
Thank you in advance for the answers and advices.
ded321 Answer
To solve this problem I gone deeper with the research and discovered some interesting things concerning MSVC 64-bit mode. I've found that we can not rely on internal compiler-predefined types in 64-bit mode because some of them are wrong.
I compared definitions of some internal structures predefined by the compiler, such as _ThrowInfo and _CatchableType, with assembly listings produced by the compiler being run with /FAs command-line switch.
Here are the instances of these structures extracted from the assembly files (below is MSVC 2015 64-bit version):
;---------------------------------------------------------------------------------------
; Listing generated by Microsoft Optimizing Compiler Version 19.00.24213.1
; Simplified: many lines skipped, some sections reordered etc -- Ded
;---------------------------------------------------------------------------------------
main proc
; struct meow_exception { int code = 3; };
;
; try
; {
; throw meow_exception();
...
lea rdx, OFFSET FLAT:_TI1?AUmeow_exception@?1??main@@YAHXZ@ ; lea &_ThrowInfo
lea rcx, QWORD PTR $T1[rsp]
call _CxxThrowException
;---------------------------------------------------------------------------------------
_TI1?AUmeow_exception@?1??main@@YAHXZ@ ; _ThrowInfo
DD 0
DD 0
DD 0
DD imagerel _CTA1?AUmeow_exception@?1??main@@YAHXZ@ ; &_CatchableTypeArray
;---------------------------------------------------------------------------------------
_CTA1?AUmeow_exception@?1??main@@YAHXZ@ ; _CatchableTypeArray
DD 1
DD imagerel _CT??_R0?AUmeow_exception@?1??main@@YAHXZ@@84 ; &_CatchableType
;---------------------------------------------------------------------------------------
_CT??_R0?AUmeow_exception@?1??main@@YAHXZ@@84 ; _CatchableType
DD 0
DD imagerel ??_R0?AUmeow_exception@?1??main@@YAHXZ@@8 ; &_TypeDescriptor
DD 0
DD 0ffffffffh
ORG $+4
DD 04h
DD 0
;---------------------------------------------------------------------------------------
??_R0?AUmeow_exception@?1??main@@YAHXZ@@8 ; _TypeDescriptor (aka std::type_info)
DQ FLAT:??_7type_info@@6B@
DQ 0
DB '.?AUmeow_exception@?1??main@@YAHXZ@', 0 ; Mangled type name
;---------------------------------------------------------------------------------------
The binary layout of 32-bit version of these structures is similar to 64-bit, with some little differences (FLAT modifier instead of imagerel in address fields and DD instead of DQ in _TypeDescriptor).
Then, let's compare this listing to the predefined types taken from ehdata.h file (f.e., see well-known source by Geoff Chappell or C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\crt\src\ehdata.h file in MSVC 2013; unfortunately this file doesn't exist in MSVC 2015 runtime sources):
typedef const struct _s__ThrowInfo
{
unsigned int attributes;
_PMFN pmfnUnwind; // this is a pointer!
int (__cdecl *pForwardCompat) (...); // this is a pointer too!
_CatchableTypeArray *pCatchableTypeArray; // this is a pointer too!
}
_ThrowInfo;
typedef const struct _s__CatchableType
{
unsigned int properties;
_TypeDescriptor *pType; // this is a pointer too!
_PMD thisDisplacement;
int sizeOrOffset;
_PMFN copyFunction; // this is a pointer too!
}
_CatchableType;
In 32-bit mode, everything is OK because pointers are 32-bit and predefined internal definitions of structures correspond with assembly listings.
In 64-bit mode, pointers in these structures are RVAs (Relative Virtual Addresses) measured from image base of the module. This is known and well-documented feature; it truly corresponds with assembler listing above. Notice imagerel address modifiers, these mean RVAs. These RVAs are 32-bit and defined as 32-bit DD keyword.
But in 64-bit mode, from the C++ side, the corresponding pointers are considered to be 64-bit. Thus, C++ binary layout of the internal compiler structures containing pointers (such as _ThrowInfo or _CatchableType above) does not correspond to the Assembler binary layout. Sizes of these structures are greater from C++ side, and the fields offsets are wrong too.
To test this, I defined my own custom structures with the same fields represented as 32-bit integer types instead of pointers:
namespace CORRECT
{
struct ThrowInfo
{
__int32 attributes;
__int32 pmfnUnwind; // now this is 32-bit RVA
__int32 pForwardCompat; // now this is 32-bit RVA
__int32 pCatchableTypeArray; // now this is 32-bit RVA
};
struct CatchableType
{
__int32 properties;
__int32 pType; // now this is 32-bit RVA
_PMD thisDisplacement;
__int32 sizeOrOffset;
__int32 copyFunction; // now this is 32-bit RVA
};
}
Then I dumped the contents of _ThrowInfo and _CatchableType using both internal definitions and my own definitions. Here's the result (MSVC 2015 64-bit):
exc->ExceptionCode = 0xE06D7363
exc->ExceptionAddress = 0x000007FEFD69A06D
exc->NumberParameters = 4
exc->ExceptionInformation[0] = 0x0000000019930520 (sig)
exc->ExceptionInformation[1] = 0x00000000002BF8B0 (object)
exc->ExceptionInformation[2] = 0x000000013F9C4210 (throwInfo)
exc->ExceptionInformation[3] = 0x000000013F950000 (module)
Built-in: _ThrowInfo, size 28
_throwInfo->attributes = 0x00000000 [ofs: 0, size: 4, type: unsigned int]
_throwInfo->pmfnUnwind = 0x00000000 [ofs: 4, size: 8, type: void (__cdecl*)(void * __ptr64)]
_throwInfo->pForwardCompat = 0x00074230 [ofs: 12, size: 8, type: int (__cdecl*)(void)]
_throwInfo->pCatchableTypeArray = 0x00000000 [ofs: 20, size: 8, type: struct _s__CatchableTypeArray const * __ptr64]
Custom: CORRECT::ThrowInfo, size 16
throwInfo->attributes = 0x00000000 [ofs: 0, size: 4, type: int]
throwInfo->pmfnUnwind = 0x00000000 [ofs: 4, size: 4, type: int]
throwInfo->pForwardCompat = 0x00000000 [ofs: 8, size: 4, type: int]
throwInfo->pCatchableTypeArray = 0x00074230 [ofs: 12, size: 4, type: int]
throwInfo->pCatchableTypeArray = 0x0000000000074230
cArray = 0x000000013F9C4230
Built-in: _CatchableType, size 36
_cType->properties = 0x00000000 [ofs: 0, size: 4, type: unsigned int]
_cType->pType = 0x00075D58 [ofs: 4, size: 8, type: struct _TypeDescriptor * __ptr64]
_cType->thisDisplacement.mdisp = 0xFFFFFFFF [ofs: 12, size: 4, type: int]
_cType->thisDisplacement.pdisp = 0x00000000 [ofs: 16, size: 4, type: int]
_cType->thisDisplacement.vdisp = 0x00000004 [ofs: 20, size: 4, type: int]
_cType->sizeOrOffset = 0x00000000 [ofs: 24, size: 4, type: int]
_cType->copyFunction = 0x00000000 [ofs: 28, size: 8, type: void (__cdecl*)(void * __ptr64)]
Custom: CORRECT::CatchableType, size 28
cType->properties = 0x00000000 [ofs: 0, size: 4, type: int]
cType->pType = 0x00075D58 [ofs: 4, size: 4, type: int]
cType->thisDisplacement.mdisp = 0x00000000 [ofs: 8, size: 4, type: int]
cType->thisDisplacement.pdisp = 0xFFFFFFFF [ofs: 12, size: 4, type: int]
cType->thisDisplacement.vdisp = 0x00000000 [ofs: 16, size: 4, type: int]
cType->sizeOrOffset = 0x00000004 [ofs: 20, size: 4, type: int]
cType->copyFunction = 0x00000000 [ofs: 24, size: 4, type: int]
cArray->arrayOfCatchableTypes[0] = 0x0000000000074240
cType = 0x000000013F9C4240
cType->pType = 0x0000000000075D58
type = 0x000000013F9C5D58
type->name() = "struct `int __cdecl main(void)'::`2'::meow_exception"
cType->sizeOrOffset = 4
See the differences in sizes of the whole structures (28 vs 16 bytes, 36 vs 28 bytes), of the pointer members (8 vs 4 bytes) and wrong offsets.
When using CORRECT:: definitions, it's easy to get correct RTTI desired.
The original C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\crt\src\ehdata.h file from MSVC 2013 runtime sources contains conditional preprocessor directives #ifdef _EH_RELATIVE_OFFSETS which substitute pointers to __int32 offsets. But predefined internal compiler types always contains 64-bit wrong pointers.
Thus, using internal definitions of RTTI structures are unreliable in 64-bit mode. One should use its own definitions where pointer members are represented as 32-bit integers (or #define _EH_RELATIVE_OFFSETS and use ehdata.h mentioned above). After that, don't forget manually convert RVAs to the common C++ pointers by adding ImageBase address as usual. But one should not trust pointer members in such structures and definitions containing such pointers because they don't reflect the true 64-bit binary layout.
I tested it with MSVC 2010, and got the same results.
Here's the code for getting correct RTTI in 64-bit MSVC environment:
#include <stdio.h>
#include <typeinfo>
#include <stdexcept>
#include <windows.h>
//------------------------------------------------------------------------------------------------------------------------------
//! These definitions are based on assembly listings produded by the compiler (/FAs) rather than built-in ones
//! @{
#pragma pack (push, 4)
namespace CORRECT
{
struct CatchableType
{
__int32 properties;
__int32 pType;
_PMD thisDisplacement;
__int32 sizeOrOffset;
__int32 copyFunction;
};
struct ThrowInfo
{
__int32 attributes;
__int32 pmfnUnwind;
__int32 pForwardCompat;
__int32 pCatchableTypeArray;
};
}
#pragma pack (pop)
//! @}
//------------------------------------------------------------------------------------------------------------------------------
const unsigned EXCEPTION_CPP_MICROSOFT = 0xE06D7363, // '?msc'
EXCEPTION_CPP_MICROSOFT_EH_MAGIC_NUMBER1 = 0x19930520, // '?msc' version magic, see ehdata.h
EXCEPTION_OUTPUT_DEBUG_STRING = 0x40010006, // OutputDebugString() call
EXCEPTION_THREAD_NAME = 0x406D1388; // Passing name of thread to the debugger
void OutputDebugPrintf (const char* format, ...);
//------------------------------------------------------------------------------------------------------------------------------
long WINAPI VectoredExceptionHandler (EXCEPTION_POINTERS* pointers)
{
const EXCEPTION_RECORD* exc = pointers->ExceptionRecord;
if (exc->ExceptionCode == EXCEPTION_OUTPUT_DEBUG_STRING ||
exc->ExceptionCode == EXCEPTION_THREAD_NAME)
return EXCEPTION_CONTINUE_SEARCH;
OutputDebugPrintf ("\n%s(): Start\n\n", __FUNCTION__);
OutputDebugPrintf ("exc->ExceptionCode = 0x%X\n", exc->ExceptionCode);
OutputDebugPrintf ("exc->ExceptionAddress = 0x%p\n", exc->ExceptionAddress);
if (exc->ExceptionInformation[0] == EXCEPTION_CPP_MICROSOFT_EH_MAGIC_NUMBER1 &&
exc->NumberParameters >= 3)
{
OutputDebugPrintf ("exc->NumberParameters = %u\n", exc->NumberParameters);
OutputDebugPrintf ("exc->ExceptionInformation[0] = 0x%p (sig)\n", (void*) exc->ExceptionInformation[0]);
OutputDebugPrintf ("exc->ExceptionInformation[1] = 0x%p (object)\n", (void*) exc->ExceptionInformation[1]);
OutputDebugPrintf ("exc->ExceptionInformation[2] = 0x%p (throwInfo)\n", (void*) exc->ExceptionInformation[2]);
if (exc->NumberParameters >= 4)
OutputDebugPrintf ("exc->ExceptionInformation[3] = 0x%p (module)\n", (void*) exc->ExceptionInformation[3]);
OutputDebugPrintf ("\n");
HMODULE module = (exc->NumberParameters >= 4)? (HMODULE) exc->ExceptionInformation[3] : NULL;
#define RVA_TO_VA_(type, addr) ( (type) ((uintptr_t) module + (uintptr_t) (addr)) )
const _ThrowInfo* _throwInfo = (const _ThrowInfo*) exc->ExceptionInformation[2];
const CORRECT::ThrowInfo* throwInfo = (const CORRECT::ThrowInfo*) exc->ExceptionInformation[2];
#define DUMP_(var, struc, field) OutputDebugPrintf ("%-32s = 0x%08X [ofs: %2u, size: %u, type: %s]\n", \
#var "->" #field, (var)->field, \
offsetof (struc, field), sizeof ((var)->field), \
typeid ((var)->field) .name());
if (_throwInfo)
{
OutputDebugPrintf ("Built-in: _ThrowInfo, size %u\n", sizeof (_ThrowInfo));
DUMP_ (_throwInfo, _ThrowInfo, attributes);
DUMP_ (_throwInfo, _ThrowInfo, pmfnUnwind);
DUMP_ (_throwInfo, _ThrowInfo, pForwardCompat);
DUMP_ (_throwInfo, _ThrowInfo, pCatchableTypeArray);
OutputDebugPrintf ("\n");
}
else
OutputDebugPrintf ("_throwInfo is NULL\n");
if (throwInfo)
{
OutputDebugPrintf ("Custom: CORRECT::ThrowInfo, size %u\n", sizeof (CORRECT::ThrowInfo));
DUMP_ ( throwInfo, CORRECT::ThrowInfo, attributes);
DUMP_ ( throwInfo, CORRECT::ThrowInfo, pmfnUnwind);
DUMP_ ( throwInfo, CORRECT::ThrowInfo, pForwardCompat);
DUMP_ ( throwInfo, CORRECT::ThrowInfo, pCatchableTypeArray);
OutputDebugPrintf ("\n");
}
else
OutputDebugPrintf ("throwInfo is NULL\n");
if (throwInfo)
{
const _CatchableTypeArray* cArray = RVA_TO_VA_(const _CatchableTypeArray*, throwInfo->pCatchableTypeArray);
OutputDebugPrintf ("throwInfo->pCatchableTypeArray = 0x%p\n", (void*)(ptrdiff_t) throwInfo->pCatchableTypeArray);
OutputDebugPrintf ("cArray = 0x%p\n\n", (void*) cArray);
const _CatchableType* _cType = RVA_TO_VA_(const _CatchableType*, cArray->arrayOfCatchableTypes[0]);
const CORRECT::CatchableType* cType = RVA_TO_VA_(const CORRECT::CatchableType*, cArray->arrayOfCatchableTypes[0]);
OutputDebugPrintf ("Built-in: _CatchableType, size %u\n", sizeof (_CatchableType));
DUMP_ (_cType, _CatchableType, properties);
DUMP_ (_cType, _CatchableType, pType);
DUMP_ (_cType, _CatchableType, thisDisplacement.mdisp);
DUMP_ (_cType, _CatchableType, thisDisplacement.pdisp);
DUMP_ (_cType, _CatchableType, thisDisplacement.vdisp);
DUMP_ (_cType, _CatchableType, sizeOrOffset);
DUMP_ (_cType, _CatchableType, copyFunction);
OutputDebugPrintf ("\n");
OutputDebugPrintf ("Custom: CORRECT::CatchableType, size %u\n", sizeof (CORRECT::CatchableType));
DUMP_ ( cType, CORRECT::CatchableType, properties);
DUMP_ ( cType, CORRECT::CatchableType, pType);
DUMP_ ( cType, CORRECT::CatchableType, thisDisplacement.mdisp);
DUMP_ ( cType, CORRECT::CatchableType, thisDisplacement.pdisp);
DUMP_ ( cType, CORRECT::CatchableType, thisDisplacement.vdisp);
DUMP_ ( cType, CORRECT::CatchableType, sizeOrOffset);
DUMP_ ( cType, CORRECT::CatchableType, copyFunction);
OutputDebugPrintf ("\n");
OutputDebugPrintf ("cArray->arrayOfCatchableTypes[0] = 0x%p\n", (void*) cArray->arrayOfCatchableTypes[0]);
OutputDebugPrintf ("cType = 0x%p\n\n", (void*) cType);
const std::type_info* type = RVA_TO_VA_(const std::type_info*, cType->pType);
OutputDebugPrintf ("cType->pType = 0x%p\n", (void*)(ptrdiff_t) cType->pType);
OutputDebugPrintf ("type = 0x%p\n\n", (void*) type);
OutputDebugPrintf ("type->name() = \"%s\"\n", type->name());
OutputDebugPrintf ("cType->sizeOrOffset = %u\n\n", (unsigned) cType->sizeOrOffset);
}
#undef DUMP_
#undef RVA_TO_VA_
}
OutputDebugPrintf ("%s(): End\n", __FUNCTION__);
return EXCEPTION_CONTINUE_SEARCH;
}
//------------------------------------------------------------------------------------------------------------------------------
void OutputDebugPrintf (const char* format, ...)
{
static char buf [1024] = "";
va_list arg; va_start (arg, format);
_vsnprintf_s (buf, sizeof (buf) - 1, _TRUNCATE, format, arg);
va_end (arg);
OutputDebugString (buf);
printf ("%s", buf);
}
//------------------------------------------------------------------------------------------------------------------------------
int main()
{
OutputDebugPrintf ("\nCompiled with MSVC %d, %d-bit\n", _MSC_VER, 8 * sizeof (void*));
OutputDebugPrintf ("\n%s(): Start\n", __FUNCTION__);
AddVectoredExceptionHandler (1, VectoredExceptionHandler);
struct meow_exception { int code; meow_exception() : code (3) {} };
try
{
throw meow_exception();
}
catch (const meow_exception& e)
{
OutputDebugPrintf ("\n%s(): catch (meow_exception { %d })\n", __FUNCTION__, e.code);
}
catch (...)
{
OutputDebugPrintf ("\n%s(): catch (...)\n", __FUNCTION__);
}
OutputDebugPrintf ("\n%s(): End\n", __FUNCTION__);
return 0;
}
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