ExceptionHandler* Method::ReadExceptionHandler(
enum CorExceptionFlag type,
long tryStart, long tryEnd,
long handlerStart, long handlerEnd,
long filterStart, ULONG token) {
auto pSection = new ExceptionHandler();
pSection->m_handlerType = type;
pSection->m_tryStart = GetInstructionAtOffset(tryStart);
pSection->m_tryEnd = GetInstructionAtOffset(tryStart + tryEnd);
pSection->m_handlerStart = GetInstructionAtOffset(handlerStart);
pSection->m_handlerEnd = GetInstructionAtOffset(handlerStart + handlerEnd,
(type & COR_ILEXCEPTION_CLAUSE_FINALLY) == COR_ILEXCEPTION_CLAUSE_FINALLY,
(type & COR_ILEXCEPTION_CLAUSE_FAULT) == COR_ILEXCEPTION_CLAUSE_FAULT,
(type & COR_ILEXCEPTION_CLAUSE_FILTER) == COR_ILEXCEPTION_CLAUSE_FILTER,
(type & COR_ILEXCEPTION_CLAUSE_NONE) == COR_ILEXCEPTION_CLAUSE_NONE);
if (filterStart != 0) {
pSection->m_filterStart = GetInstructionAtOffset(filterStart);
}
pSection->m_token = token;
return pSection;
}
/// <summary>Read the section handler section.</summary>
/// <remarks>All 'Small' sections are to be converted to 'Fat' sections.</remarks>
void Method::ReadSections()
{
if ((m_header.Flags & CorILMethod_MoreSects) == CorILMethod_MoreSects)
{
BYTE flags = 0;
do
{
Align<DWORD>(); // must be DWORD aligned
flags = Read<BYTE>();
_ASSERTE((flags & CorILMethod_Sect_EHTable) == CorILMethod_Sect_EHTable);
if ((flags & CorILMethod_Sect_FatFormat) == CorILMethod_Sect_FatFormat)
{
Advance(-1);
int count = ((Read<ULONG>() >> 8) / 24);
for (int i = 0; i < count; i++)
{
CorExceptionFlag type = (CorExceptionFlag)Read<ULONG>();
long tryStart = Read<long>();
long tryEnd = Read<long>();
long handlerStart = Read<long>();
long handlerEnd = Read<long>();
long filterStart = 0;
ULONG token = 0;
switch (type)
{
case COR_ILEXCEPTION_CLAUSE_FILTER:
filterStart = Read<long>();
break;
default:
token = Read<ULONG>();
break;
}
ExceptionHandler * pSection = new ExceptionHandler();
pSection->m_handlerType = type;
pSection->m_tryStart = GetInstructionAtOffset(tryStart);
pSection->m_tryEnd = GetInstructionAtOffset(tryStart + tryEnd);
pSection->m_handlerStart = GetInstructionAtOffset(handlerStart);
pSection->m_handlerEnd = GetInstructionAtOffset(handlerStart + handlerEnd,
(type & COR_ILEXCEPTION_CLAUSE_FINALLY) == COR_ILEXCEPTION_CLAUSE_FINALLY);
if (filterStart!=0)
{
pSection->m_filterStart = GetInstructionAtOffset(filterStart);
}
pSection->m_token = token;
m_exceptions.push_back(pSection);
}
}
else
{
int count = (int)(Read<BYTE>() / 12);
Advance(2);
for (int i = 0; i < count; i++)
{
CorExceptionFlag type = (CorExceptionFlag)Read<USHORT>();
long tryStart = Read<USHORT>();
long tryEnd = Read<BYTE>();
long handlerStart = Read<USHORT>();
long handlerEnd = Read<BYTE>();
long filterStart = 0;
ULONG token = 0;
switch (type)
{
case COR_ILEXCEPTION_CLAUSE_FILTER:
filterStart = Read<long>();
break;
default:
token = Read<ULONG>();
break;
}
ExceptionHandler * pSection = new ExceptionHandler();
pSection->m_handlerType = type;
pSection->m_tryStart = GetInstructionAtOffset(tryStart);
pSection->m_tryEnd = GetInstructionAtOffset(tryStart + tryEnd);
pSection->m_handlerStart = GetInstructionAtOffset(handlerStart);
pSection->m_handlerEnd = GetInstructionAtOffset(handlerStart + handlerEnd,
(type & COR_ILEXCEPTION_CLAUSE_FINALLY) == COR_ILEXCEPTION_CLAUSE_FINALLY);
if (filterStart!=0)
{
pSection->m_filterStart = GetInstructionAtOffset(filterStart);
}
pSection->m_token = token;
m_exceptions.push_back(pSection);
}
}
} while((flags & CorILMethod_Sect_MoreSects) == CorILMethod_Sect_MoreSects);