353 lines
9.7 KiB
C
353 lines
9.7 KiB
C
/*++
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Copyright (c) 1996 Microsoft Corporation
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Module Name:
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excprt.c
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Abstract:
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This module uses imagehlp.dll to dump the stack when an exception occurs.
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Author:
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Sunita Shrivastava(sunitas) 11/5/1997
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Revision History:
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--*/
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#include "initp.h"
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#include "dbghelp.h"
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// Make typedefs for some IMAGEHLP.DLL functions so that we can use them
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// with GetProcAddress
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typedef BOOL (__stdcall * SYMINITIALIZEPROC)( HANDLE, LPSTR, BOOL );
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typedef BOOL (__stdcall *SYMCLEANUPPROC)( HANDLE );
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typedef BOOL (__stdcall * STACKWALKPROC)
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( DWORD, HANDLE, HANDLE, LPSTACKFRAME, LPVOID,
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PREAD_PROCESS_MEMORY_ROUTINE,
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PFUNCTION_TABLE_ACCESS_ROUTINE,
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PGET_MODULE_BASE_ROUTINE, PTRANSLATE_ADDRESS_ROUTINE );
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typedef LPVOID (__stdcall *SYMFUNCTIONTABLEACCESSPROC)( HANDLE, ULONG_PTR );
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typedef ULONG_PTR (__stdcall *SYMGETMODULEBASEPROC)( HANDLE, ULONG_PTR );
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typedef BOOL (__stdcall *SYMGETSYMFROMADDRPROC)
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( HANDLE, ULONG_PTR, PULONG_PTR, PIMAGEHLP_SYMBOL );
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SYMINITIALIZEPROC _SymInitialize = 0;
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SYMCLEANUPPROC _SymCleanup = 0;
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STACKWALKPROC _StackWalk = 0;
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SYMFUNCTIONTABLEACCESSPROC _SymFunctionTableAccess = 0;
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SYMGETMODULEBASEPROC _SymGetModuleBase = 0;
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SYMGETSYMFROMADDRPROC _SymGetSymFromAddr = 0;
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//local prototypes for forward use
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BOOL InitImagehlpFunctions();
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void ImagehlpStackWalk( IN PCONTEXT pContext );
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BOOL GetLogicalAddress(
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IN PVOID addr,
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OUT LPWSTR szModule,
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IN DWORD len,
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OUT LPDWORD section,
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OUT PULONG_PTR offset );
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void GenerateExceptionReport(
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IN PEXCEPTION_POINTERS pExceptionInfo)
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/*++
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Routine Description:
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Top level exception handler for the cluster service process.
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Currently this just exits immediately and assumes that the
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cluster proxy will notice and restart us as appropriate.
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Arguments:
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ExceptionInfo - Supplies the exception information
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Return Value:
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None.
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--*/
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{
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PCONTEXT pCtxt = pExceptionInfo->ContextRecord;
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if ( !InitImagehlpFunctions() )
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{
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ClRtlLogPrint(LOG_CRITICAL,
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"[CS] Dbghelp.dll or its exported procs not found\r\n");
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#if 0
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#ifdef _M_IX86 // Intel Only!
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// Walk the stack using x86 specific code
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IntelStackWalk( pCtx );
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#endif
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#endif
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return;
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}
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ImagehlpStackWalk( pCtxt );
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_SymCleanup( GetCurrentProcess() );
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}
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BOOL InitImagehlpFunctions()
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/*++
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Routine Description:
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Initializes the imagehlp functions/data.
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Arguments:
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None.
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Return Value:
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None.
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--*/
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{
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HMODULE hModImagehlp = LoadLibraryW( L"DBGHELP.DLL" );
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if ( !hModImagehlp )
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return FALSE;
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_SymInitialize = (SYMINITIALIZEPROC)GetProcAddress( hModImagehlp,
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"SymInitialize" );
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if ( !_SymInitialize )
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return FALSE;
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_SymCleanup = (SYMCLEANUPPROC)GetProcAddress( hModImagehlp, "SymCleanup" );
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if ( !_SymCleanup )
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return FALSE;
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_StackWalk = (STACKWALKPROC)GetProcAddress( hModImagehlp, "StackWalk" );
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if ( !_StackWalk )
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return FALSE;
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_SymFunctionTableAccess = (SYMFUNCTIONTABLEACCESSPROC)
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GetProcAddress( hModImagehlp, "SymFunctionTableAccess" );
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if ( !_SymFunctionTableAccess )
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return FALSE;
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_SymGetModuleBase=(SYMGETMODULEBASEPROC)GetProcAddress( hModImagehlp,
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"SymGetModuleBase");
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if ( !_SymGetModuleBase )
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return FALSE;
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_SymGetSymFromAddr=(SYMGETSYMFROMADDRPROC)GetProcAddress( hModImagehlp,
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"SymGetSymFromAddr" );
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if ( !_SymGetSymFromAddr )
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return FALSE;
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if ( !_SymInitialize( GetCurrentProcess(), 0, TRUE ) )
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return FALSE;
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return TRUE;
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}
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void ImagehlpStackWalk(
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IN PCONTEXT pContext )
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/*++
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Routine Description:
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Walks the stack, and writes the results to the report file
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Arguments:
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ExceptionInfo - Supplies the exception information
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Return Value:
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None.
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--*/
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{
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STACKFRAME sf;
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BYTE symbolBuffer[ sizeof(IMAGEHLP_SYMBOL) + 512 ];
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PIMAGEHLP_SYMBOL pSymbol = (PIMAGEHLP_SYMBOL)symbolBuffer;
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ULONG_PTR symDisplacement = 0; // Displacement of the input address,
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// relative to the start of the symbol
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DWORD dwMachineType;
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UCHAR printBuffer[512];
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DWORD nextPrtBufChar;
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#if defined (_M_IX86)
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dwMachineType = IMAGE_FILE_MACHINE_I386;
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#else if defined(_M_ALPHA)
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dwMachineType = IMAGE_FILE_MACHINE_ALPHA;
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#endif
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ClRtlLogPrint(LOG_CRITICAL,
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"[CS] CallStack:\r\n");
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ClRtlLogPrint(LOG_CRITICAL,
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"[CS] Frame Address\r\n");
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// Could use SymSetOptions here to add the SYMOPT_DEFERRED_LOADS flag
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memset( &sf, 0, sizeof(sf) );
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#if defined (_M_IX86)
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// Initialize the STACKFRAME structure for the first call. This is only
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// necessary for Intel CPUs, and isn't mentioned in the documentation.
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sf.AddrPC.Offset = pContext->Eip;
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sf.AddrPC.Mode = AddrModeFlat;
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sf.AddrStack.Offset = pContext->Esp;
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sf.AddrStack.Mode = AddrModeFlat;
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sf.AddrFrame.Offset = pContext->Ebp;
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sf.AddrFrame.Mode = AddrModeFlat;
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#endif // _M_IX86
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while ( 1 )
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{
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if ( ! _StackWalk( dwMachineType,
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GetCurrentProcess(),
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GetCurrentThread(),
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&sf,
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pContext,
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0,
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_SymFunctionTableAccess,
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_SymGetModuleBase,
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0 ) )
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break;
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if ( 0 == sf.AddrFrame.Offset ) // Basic sanity check to make sure
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break; // the frame is OK. Bail if not.
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nextPrtBufChar = sprintf(printBuffer,
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" %08X %08X ",
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sf.AddrFrame.Offset, sf.AddrPC.Offset );
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// IMAGEHLP is wacky, and requires you to pass in a pointer to an
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// IMAGEHLP_SYMBOL structure. The problem is that this structure is
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// variable length. That is, you determine how big the structure is
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// at runtime. This means that you can't use sizeof(struct).
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// So...make a buffer that's big enough, and make a pointer
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// to the buffer. We also need to initialize not one, but TWO
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// members of the structure before it can be used.
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pSymbol->SizeOfStruct = sizeof(symbolBuffer);
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pSymbol->MaxNameLength = 512;
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if ( _SymGetSymFromAddr(GetCurrentProcess(), sf.AddrPC.Offset,
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&symDisplacement, pSymbol) )
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{
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sprintf(printBuffer+nextPrtBufChar,
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"%hs+%p\n",
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pSymbol->Name, symDisplacement);
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}
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else // No symbol found. Print out the logical address instead.
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{
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WCHAR szModule[MAX_PATH] = L"";
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DWORD section = 0;
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ULONG_PTR offset = 0;
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GetLogicalAddress( (PVOID)sf.AddrPC.Offset,
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szModule, sizeof(szModule)/sizeof(WCHAR),
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§ion, &offset );
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sprintf(printBuffer+nextPrtBufChar,
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"%04X:%08p %s\n",
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section, offset, szModule );
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}
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ClRtlLogPrint(LOG_CRITICAL, "%1!hs!\n", printBuffer );
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}
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}
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BOOL GetLogicalAddress(
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IN PVOID addr,
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OUT LPWSTR szModule,
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IN DWORD len,
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OUT LPDWORD section,
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OUT PULONG_PTR offset )
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/*++
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Routine Description:
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Given a linear address, locates the module, section, and offset containing
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that address.
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Note: the szModule paramater buffer is an output buffer of length specified
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by the len parameter (in characters!)
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Arguments:
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ExceptionInfo - Supplies the exception information
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Return Value:
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None.
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--*/
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{
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MEMORY_BASIC_INFORMATION mbi;
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ULONG_PTR hMod;
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// Point to the DOS header in memory
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PIMAGE_DOS_HEADER pDosHdr;
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// From the DOS header, find the NT (PE) header
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PIMAGE_NT_HEADERS pNtHdr;
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PIMAGE_SECTION_HEADER pSection;
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ULONG_PTR rva ;
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int i;
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if ( !VirtualQuery( addr, &mbi, sizeof(mbi) ) )
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return FALSE;
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hMod = (ULONG_PTR)mbi.AllocationBase;
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if ( !GetModuleFileName( (HMODULE)hMod, szModule, len ) )
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return FALSE;
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rva = (ULONG_PTR)addr - hMod; // RVA is offset from module load address
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pDosHdr = (PIMAGE_DOS_HEADER)hMod;
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pNtHdr = (PIMAGE_NT_HEADERS)(hMod + pDosHdr->e_lfanew);
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pSection = IMAGE_FIRST_SECTION( pNtHdr );
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// Iterate through the section table, looking for the one that encompasses
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// the linear address.
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for ( i = 0; i < pNtHdr->FileHeader.NumberOfSections;
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i++, pSection++ )
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{
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ULONG_PTR sectionStart = pSection->VirtualAddress;
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ULONG_PTR sectionEnd = sectionStart
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+ max(pSection->SizeOfRawData, pSection->Misc.VirtualSize);
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// Is the address in this section???
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if ( (rva >= sectionStart) && (rva <= sectionEnd) )
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{
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// Yes, address is in the section. Calculate section and offset,
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// and store in the "section" & "offset" params, which were
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// passed by reference.
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*section = i+1;
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*offset = rva - sectionStart;
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return TRUE;
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}
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}
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return FALSE; // Should never get here!
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}
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