SymGetLineFromAddr64

SymGetLineFromAddr64 is a function in the Microsoft Debugging Tools for Windows (WinDbg) API that retrieves source code line information for a given memory address. It is part of the Debug Help Library (DbgHelp.dll). The function takes a process handle, an address, and pointers to variables that will receive the line number and file name. It returns a boolean value indicating success or failure.

When debugging, it's often necessary to map a memory address back to the specific line of source code where that address resides. SymGetLineFromAddr64 facilitates this by querying symbol information loaded for the process. This information includes mapping addresses to source files and line numbers. If the function is successful, it populates the provided variables with the relevant data. The output includes the name of the source file and the corresponding line number within that file.

This function is particularly useful for crash dumps, live debugging, and any scenario where you need to understand the execution flow at a granular source code level. It relies on symbol files (like .pdb files) being available and correctly loaded for the module containing the specified address. Without adequate symbol information, SymGetLineFromAddr64 will likely fail to retrieve the requested line details. The 64 in its name indicates it is the 64-bit version of the function, designed for use with 64-bit processes and environments.