IDiaDataSource::loadAndValidateDataFromPdb

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11/15/2016

Note

This article applies to Visual Studio 2015. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here

Opens and verifies that the program database (.pdb) file matches the signature information provided, and prepares the .pdb file as a debug data source.

Syntax

HRESULT loadAndValidateDataFromPdb (   
   LPCOLESTR pdbPath,  
   GUID*     pcsig70,  
   DWORD     sig,  
   DWORD     age  
);

Parameters

pdbPath
[in] The path to the .pdb file.

pcsig70
[in] The GUID signature to verify against the .pdb file signature. Only .pdb files in Visual C++ and later have GUID signatures.

sig
[in] The 32-bit signature to verify against the .pdb file signature.

age
[in] Age value to verify. The age does not necessarily correspond to any known time value, it is used to determine if a .pdb file is out of sync with a corresponding .exe file.

Return Value

If successful, returns S_OK; otherwise, returns an error code. The following table shows the possible return values for this method.

Value	Description
E_PDB_NOT_FOUND	Failed to open the file, or the file has an invalid format.
E_PDB_FORMAT	Attempted to access a file with an obsolete format.
E_PDB_INVALID_SIG	Signature does not match.
E_PDB_INVALID_AGE	Age does not match.
E_INVALIDARG	Invalid parameter.
E_UNEXPECTED	The data source has already been prepared.

Remarks

A .pdb file contains both signature and age values. These values are replicated in the .exe or .dll file that matches the .pdb file. Before preparing the data source, this method verifies that the named .pdb file's signature and age match the values provided.

To load a .pdb file without validation, use the IDiaDataSource::loadDataFromPdb method.

To gain access to the data load process (through a callback mechanism), use the IDiaDataSource::loadDataForExe method.

To load a .pdb file directly from memory, use the IDiaDataSource::loadDataFromIStream method.

Example

IDiaDataSource* pSource;  // Previously created data source.  
DEFINE_GUID(expectedGUIDSignature,0x1234,0x5678,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08);  
DWORD expectedFileSignature = 0x12345678;  
DWORD expectedAge           = 128;  
  
HRESULT hr;  
hr = pSource->loadAndValidateDataFromPdb( L"yprog.pdb",  
                                          &expectedGUIDSignature,  
                                          expectedFileSignature,  
                                          expectedAge);  
if (FAILED(hr))  
{  
    // Report an error  
}

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