- 1 year ago
how to use SymGetSourceFile api for fetching source file in postmortem debugging
To use the SymGetSourceFile
API for fetching the source file in postmortem debugging, you need to follow these steps:
Initialize the Debugging API: Before using any symbol-related APIs, you need to initialize the debugging API by calling
SymInitialize
with the appropriate parameters. For example:cppSymInitialize(processHandle, nullptr, TRUE);
Load Symbols: Load the symbols for the target module or executable using the
SymLoadModule
API. This allows the debugging engine to access the symbol information. For example:cppSymLoadModule(processHandle, nullptr, "your_module.dll", nullptr, baseAddress, size);
Get Source File Name: Use the
SymGetSourceFile
API to fetch the source file name for a specific address or module. This function retrieves the source file name associated with a given address and returns the file name and line number information. For example:cppDWORD64 displacement;
char sourceFile[MAX_PATH];
if (SymGetSourceFile(processHandle, baseAddress, nullptr, nullptr, sourceFile, sizeof(sourceFile), &displacement))
{
// Source file name is available in the 'sourceFile' variable.
}
In the above example,
baseAddress
is the base address of the module or the address you want to retrieve the source file for. ThesourceFile
variable will store the retrieved source file name.Cleanup: After you have finished using the debugging symbols and APIs, it's important to perform cleanup operations. Call
SymCleanup
to release any resources associated with the debugging API. For example:cppSymCleanup(processHandle);
Ensure that you have the necessary debugging symbols and the correct debug information for the target module or executable. Without proper symbols, the debugging API may not be able to fetch the source file information accurately.
Please note that the provided code snippets are in C++. You'll need to include the necessary headers and use appropriate error handling techniques in your implementation. Additionally, the processHandle
, baseAddress
, and other related variables need to be set according to your specific use case.
For more detailed information and usage examples, you can refer to the Microsoft documentation for the Debugging Tools for Windows and the SymGetSourceFile
API.