void PE_Debug :: FindDebugInfo()
{
ClearDebugPtrs() ;
// Put everything into a try/catch in case the file has wrong fields
try
{
// Verify that fileBase is a valid pointer to a DOS header
if( fileBase->e_magic == IMAGE_DOS_SIGNATURE )
{
// Get a pointer to the PE header
NT_Header = BasedPtr( PIMAGE_NT_HEADERS, fileBase, fileBase->e_lfanew ) ;
// Verify that NT_Header is a valid pointer to a NT header
if( NT_Header->Signature == IMAGE_NT_SIGNATURE )
{
// Get a pointer to the debug header if any
COFFDebugInfo = GetDebugHeader() ;
// Get a pointer to the symbol table and retrieve the number of symbols
if( NT_Header->FileHeader.PointerToSymbolTable )
COFFSymbolTable =
BasedPtr( PIMAGE_SYMBOL, fileBase, NT_Header->FileHeader.PointerToSymbolTable ) ;
COFFSymbolCount = NT_Header->FileHeader.NumberOfSymbols ;
// The string table starts right after the symbol table
stringTable = (const char*)(COFFSymbolTable + COFFSymbolCount) ;
}
}
}
catch( ... )
{
// Header wrong, do nothing
}
}
// second-phase constructor
void CServerCrashDataSource::ConstructL()
{
LOG_MSG("->CServerCrashDataSource::ConstructL()\n" );
// Get the debug func block and make appropriate changes to our structures
TInt err;
TUint32 bufsize = 0;
LOG_MSG( " -> iSecSess->GetDebugFunctionalityBufSize( &bufsize )\n" );
err = iSecSess.GetDebugFunctionalityBufSize( &bufsize );
if( (err != KErrNone) || (0 == bufsize) )
{
// No debug functionality block, cannot do much without that.
LOG_MSG2("CServerCrashDataSource::ConstructL() - unable to get debug functionality block! err:%d\n", err);
User::Leave( KErrNotSupported );
}
RBuf8 DFBlock;
DFBlock.CreateL(bufsize);
DFBlock.CleanupClosePushL();
LOG_MSG2( " -> HBufC8::NewLC( bufsize=%d )\n", bufsize );
LOG_MSG("CServerCrashDataSource::ConstrucL -> GetDebugFunctionality()\n" );
err = iSecSess.GetDebugFunctionality(DFBlock);
if( KErrNone != err )
{
LOG_MSG( "CServerCrashDataSource::ConstructL() : ERROR !* : Could not retrieve debug functionality block\n" );
User::Leave( KErrNotSupported );
}
LOG_MSG( " -> GetDebugHeader( EDF_TagHdrId_RegistersCore )\n" );
TTagHeader * hdr = GetDebugHeader( ETagHeaderIdRegistersCore, DFBlock );
if( hdr == NULL )
{
LOG_MSG( "Could not retrieve ETagHeaderIdRegistersCore register debug block\n" );
}
else if( 0 == hdr->iNumTags )
{
LOG_MSG( "Zero tags found for ETagHeaderIdRegistersCore register debug block\n" );
}
else
{
iRegisterList.ReserveL( (TInt)hdr->iNumTags );
// Skip the header to get to the tags
TUint8 * ptr = ((TUint8 *) hdr) + sizeof( TTagHeader );
TTag * tag = (TTag *) ptr;
TRegisterData regData;
TRegisterData * reg = ®Data;
// Process all the register tags
for( TInt regIdx = 0; regIdx < hdr->iNumTags; regIdx ++ )
{
reg->iRegClass = 0; // Core = 0
reg->iId = tag->iTagId; //
reg->iSubId = 0; //
reg->iSize = 2; // Should all be 32 bits == 2.
reg->iAvailable = ETrue;
reg->iValue64 = 0;
iRegisterList.Append( *reg );
tag++;
}
}
hdr = GetDebugHeader( ETagHeaderIdMemory, DFBlock );
if( hdr == NULL )
{
LOG_MSG( "Could not retrieve ETagHeaderIdMemory. Cannot read memory\n" );
iMaxMemReadSize = 0;
}
else if( 0 == hdr->iNumTags )
{
LOG_MSG( "Zero tags found for ETagHeaderIdMemory register debug block\n" );
iMaxMemReadSize = 0;
}
else
{
TTag* tag = GetTag( hdr, EMemoryMaxBlockSize );
if( tag )
{
//LOG_MSG2( " EMemoryMaxBlockSize =0x%X\n", tag->iValue );
iMaxMemReadSize = tag->iValue;
}
}
iLastThreadListSize = 1;
iLastProcListSize = 1;
iLastRegListSize = 1;
CleanupStack::PopAndDestroy(&DFBlock);
}
