SymGetLineFromAddr64 Function

Debug Help Library

SymGetLineFromAddr64 Function

Locates the source line for the specified address.

This function supersedes the SymGetLineFromAddr function. For more information, see Updated Platform Support.

BOOL WINAPI SymGetLineFromAddr64(
  __in          HANDLE hProcess,
  __in          DWORD64 dwAddr,
  __out         PDWORD pdwDisplacement,
  __out         PIMAGEHLP_LINE64 Line



A handle to the process that was originally passed to the SymInitialize function.


The address for which a line should be located. It is not necessary for the address to be on a line boundary. If the address appears after the beginning of a line and before the end of the line, the line is found.


The displacement from the beginning of the line, or zero.


A pointer to an IMAGEHLP_LINE64 structure.

Return Value

If the function succeeds, the return value is TRUE.

If the function fails, the return value is FALSE. To retrieve extended error information, call GetLastError.


The caller must allocate the Line buffer properly and fill in the required members of the IMAGEHLP_LINE64 structure before calling SymGetLineFromAddr64.

This function returns a pointer to a buffer that may be reused by another function. Therefore, be sure to copy the data returned to another buffer immediately.

All DbgHelp 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.

To call the Unicode version of this function, define DBGHELP_TRANSLATE_TCHAR.

Example Code

For an example, see Retrieving Symbol Information by Address.



Requires DbgHelp.dll 5.1 or later.


Declared in Dbghelp.h.


Use Dbghelp.lib.


Requires Dbghelp.dll.


Implemented as SymGetLineFromAddrW64 (Unicode) and SymGetLineFromAddr64 (ANSI).

See Also

DbgHelp FunctionsIMAGEHLP_LINE64

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Build date: 9/25/2007

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