// RegValueHome::SetEnregisteredValue
// set a remote enregistered location to a new value (see code:EnregisteredValueHome::SetEnregisteredValue
// for full header comment)
void RegValueHome::SetEnregisteredValue(MemoryRange newValue, DT_CONTEXT * pContext, bool fIsSigned)
{
SIZE_T extendedVal = 0;
// If the value is in a reg, then it's going to be a register's width (regardless of
// the actual width of the data).
// For signed types, like i2, i1, make sure we sign extend.
if (fIsSigned)
{
// Sign extend. SSIZE_T is a register size signed value.
// Casting
switch(newValue.Size())
{
case 1: _ASSERTE(sizeof( BYTE) == 1);
extendedVal = (SSIZE_T) *(char*)newValue.StartAddress(); break;
case 2: _ASSERTE(sizeof( WORD) == 2);
extendedVal = (SSIZE_T) *(short*)newValue.StartAddress(); break;
case 4: _ASSERTE(sizeof(DWORD) == 4);
extendedVal = (SSIZE_T) *(int*)newValue.StartAddress(); break;
#if defined(DBG_TARGET_WIN64)
case 8: _ASSERTE(sizeof(ULONGLONG) == 8);
extendedVal = (SSIZE_T) *(ULONGLONG*)newValue.StartAddress(); break;
#endif // DBG_TARGET_WIN64
default: _ASSERTE(!"bad size");
}
}
else
{
// Zero extend.
switch(newValue.Size())
{
case 1: _ASSERTE(sizeof( BYTE) == 1);
extendedVal = *( BYTE*)newValue.StartAddress(); break;
case 2: _ASSERTE(sizeof( WORD) == 2);
extendedVal = *( WORD*)newValue.StartAddress(); break;
case 4: _ASSERTE(sizeof(DWORD) == 4);
extendedVal = *(DWORD*)newValue.StartAddress(); break;
#if defined(DBG_TARGET_WIN64)
case 8: _ASSERTE(sizeof(ULONGLONG) == 8);
extendedVal = *(ULONGLONG*)newValue.StartAddress(); break;
#endif // DBG_TARGET_WIN64
default: _ASSERTE(!"bad size");
}
}
SetContextRegister(pContext, m_reg1Info.m_kRegNumber, extendedVal); // throws
} // RegValueHome::SetEnregisteredValue
// RegValueHome::GetEnregisteredValue
// Gets an enregistered value and returns it to the caller (see EnregisteredValueHome::GetEnregisteredValue
// for full header comment)
void RegValueHome::GetEnregisteredValue(MemoryRange valueOutBuffer)
{
UINT_PTR* reg = m_pFrame->GetAddressOfRegister(m_reg1Info.m_kRegNumber);
PREFIX_ASSUME(reg != NULL);
_ASSERTE(sizeof(*reg) == valueOutBuffer.Size());
memcpy(valueOutBuffer.StartAddress(), reg, sizeof(*reg));
} // RegValueHome::GetEnregisteredValue
// RegRegValueHome::SetEnregisteredValue
// set a remote enregistered location to a new value (see EnregisteredValueHome::SetEnregisteredValue
// for full header comment)
void RegRegValueHome::SetEnregisteredValue(MemoryRange newValue, DT_CONTEXT * pContext, bool fIsSigned)
{
_ASSERTE(newValue.Size() == 8);
_ASSERTE(REG_SIZE == sizeof(void*));
// Split the new value into high and low parts.
SIZE_T highPart;
SIZE_T lowPart;
memcpy(&lowPart, newValue.StartAddress(), REG_SIZE);
memcpy(&highPart, (BYTE *)newValue.StartAddress() + REG_SIZE, REG_SIZE);
// Update the proper registers.
SetContextRegister(pContext, m_reg1Info.m_kRegNumber, highPart); // throws
SetContextRegister(pContext, m_reg2Info.m_kRegNumber, lowPart); // throws
// update the frame's register display
void * valueAddress = (void *)(m_pFrame->GetAddressOfRegister(m_reg1Info.m_kRegNumber));
memcpy(valueAddress, newValue.StartAddress(), newValue.Size());
} // RegRegValueHome::SetEnregisteredValue
HRESULT DacReplacePatchesInHostMemory(MemoryRange range, PVOID pBuffer)
{
SUPPORTS_DAC;
// If the patch table is invalid, then there is no patch to replace.
if (!DebuggerController::GetPatchTableValid())
{
return S_OK;
}
HASHFIND info;
DebuggerPatchTable * pTable = DebuggerController::GetPatchTable();
DebuggerControllerPatch * pPatch = pTable->GetFirstPatch(&info);
// <PERF>
// The unwinder needs to read the stack very often to restore pushed registers, retrieve the
// return addres, etc. However, stack addresses should never be patched.
// One way to optimize this code is to pass the stack base and the stack limit of the thread to this
// function and use those two values to filter out stack addresses.
//
// Another thing we can do is instead of enumerating the patches, we could enumerate the address.
// This is more efficient when we have a large number of patches and a small memory range. Perhaps
// we could do a hybrid approach, i.e. use the size of the range and the number of patches to dynamically
// determine which enumeration is more efficient.
// </PERF>
while (pPatch != NULL)
{
CORDB_ADDRESS patchAddress = (CORDB_ADDRESS)dac_cast<TADDR>(pPatch->address);
if (patchAddress != NULL)
{
PRD_TYPE opcode = pPatch->opcode;
CORDB_ADDRESS address = (CORDB_ADDRESS)(dac_cast<TADDR>(range.StartAddress()));
SIZE_T cbSize = range.Size();
// Check if the address of the patch is in the specified memory range.
if (IsPatchInRequestedRange(address, cbSize, patchAddress))
{
// Replace the patch in the buffer with the original opcode.
CORDbgSetInstructionEx(reinterpret_cast<PBYTE>(pBuffer), address, patchAddress, opcode, cbSize);
}
}
pPatch = pTable->GetNextPatch(&info);
}
return S_OK;
}
// RegRegValueHome::GetEnregisteredValue
// Gets an enregistered value and returns it to the caller (see EnregisteredValueHome::GetEnregisteredValue
// for full header comment)
void RegRegValueHome::GetEnregisteredValue(MemoryRange valueOutBuffer)
{
UINT_PTR* highWordAddr = m_pFrame->GetAddressOfRegister(m_reg1Info.m_kRegNumber);
PREFIX_ASSUME(highWordAddr != NULL);
UINT_PTR* lowWordAddr = m_pFrame->GetAddressOfRegister(m_reg2Info.m_kRegNumber);
PREFIX_ASSUME(lowWordAddr != NULL);
_ASSERTE(sizeof(*highWordAddr) + sizeof(*lowWordAddr) == valueOutBuffer.Size());
memcpy(valueOutBuffer.StartAddress(), lowWordAddr, sizeof(*lowWordAddr));
memcpy((BYTE *)valueOutBuffer.StartAddress() + sizeof(*lowWordAddr), highWordAddr, sizeof(*highWordAddr));
} // RegRegValueHome::GetEnregisteredValue
// header comment)
void RegMemValueHome::CopyToIPCEType(RemoteAddress * pRegAddr)
{
pRegAddr->kind = RAK_REGMEM;
pRegAddr->reg1 = m_reg1Info.m_kRegNumber;
pRegAddr->reg1Addr = CORDB_ADDRESS_TO_PTR(m_reg1Info.m_regAddr);
pRegAddr->reg1Value = m_reg1Info.m_regValue;
pRegAddr->addr = m_memAddr;
} // RegMemValueHome::CopyToIPCEType
// RegMemValueHome::SetEnregisteredValue
// set a remote enregistered location to a new value (see EnregisteredValueHome::SetEnregisteredValue
// for full header comment)
void RegMemValueHome::SetEnregisteredValue(MemoryRange newValue, DT_CONTEXT * pContext, bool fIsSigned)
{
_ASSERTE(newValue.Size() == REG_SIZE >> 1); // make sure we have bytes for two registers
_ASSERTE(REG_SIZE == sizeof(void*));
// Split the new value into high and low parts.
SIZE_T highPart;
SIZE_T lowPart;
memcpy(&lowPart, newValue.StartAddress(), REG_SIZE);
memcpy(&highPart, (BYTE *)newValue.StartAddress() + REG_SIZE, REG_SIZE);
// Update the proper registers.
SetContextRegister(pContext, m_reg1Info.m_kRegNumber, highPart); // throws
_ASSERTE(REG_SIZE == sizeof(lowPart));
HRESULT hr = m_pFrame->GetProcess()->SafeReadStruct(m_memAddr, &lowPart);
IfFailThrow(hr);