UpdateDebugInfoFileEx Function

Debug Help Library

UpdateDebugInfoFileEx Function

Uses the specified extended information to update the corresponding fields in the symbol file.

BOOL UpdateDebugInfoFileEx(
  __in          PSTR ImageFileName,
  __in          PSTR SymbolPath,
  __out         PSTR DebugFilePath,
  __in          PIMAGE_NT_HEADERS NtHeaders,
  __in          DWORD OldChecksum



The name of the image that is now out of date with respect to its symbol file.


The path in which to look for the symbol file.


A pointer to a buffer that receives the name of the symbol file that was updated.


A pointer to an IMAGE_NT_HEADERS structure that specifies the new header information.


The original checksum value. If this value does not match the checksum that is present in the mapped image, the flags in the symbol file contain IMAGE_SEPARATE_DEBUG_MISMATCH and the last error value is set to ERROR_INVALID_DATA.

Return Value

If the function succeeds, the return value is TRUE.

If the function fails, the return value is FALSE.


The UpdateDebugInfoFileEx function takes the information stored in the IMAGE_NT_HEADERS structure and updates the corresponding fields in the symbol file. Any time an image file is modified, this function should be called to keep the numbers in sync. Specifically, whenever an image checksum changes, the symbol file should be updated to match.

All ImageHlp functions, such as this one, are single threaded. Therefore, calls from more than one thread to this function will likely result in unexpected behavior or memory corruption. To avoid this, you must synchronize all concurrent calls from more than one thread to this function.



Requires Windows Vista, Windows XP, Windows 2000 Professional, Windows NT Workstation 4.0, Windows Me, Windows 98, or Windows 95.


Requires Windows Server 2008, Windows Server 2003, Windows 2000 Server, or Windows NT Server 4.0.


Declared in Imagehlp.h.


Use Imagehlp.lib.


Requires Imagehlp.dll.

See Also

ImageHlp FunctionsIMAGE_NT_HEADERS

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Build date: 9/25/2007

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