/// <summary>
/// Locate and lazily load debug info for the native app module overlapping given
/// virtual address.
/// </summary>
/// <param name="ip">Instruction pointer address (code address for the lookup)</param>
/// <param name="rva">Output VA relative to module base</param>
private static IDiaSession GetDiaSession(IntPtr ip, out int rva)
{
if (ip == IntPtr.Zero)
{
rva = -1;
return(null);
}
IntPtr moduleBase = RuntimeAugments.GetOSModuleFromPointer(ip);
if (moduleBase == IntPtr.Zero)
{
rva = -1;
return(null);
}
rva = (int)(ip.ToInt64() - moduleBase.ToInt64());
if (s_loadedModules == null)
{
// Lazily create the parallel arrays s_loadedModules and s_perModuleDebugInfo
int moduleCount = RuntimeAugments.GetLoadedOSModules(null);
s_loadedModules = new IntPtr[moduleCount];
s_perModuleDebugInfo = new IDiaSession[moduleCount];
// Actually read the module addresses into the array
RuntimeAugments.GetLoadedOSModules(s_loadedModules);
}
// Locate module index based on base address
int moduleIndex = s_loadedModules.Length;
do
{
if (--moduleIndex < 0)
{
return(null);
}
}while(s_loadedModules[moduleIndex] != moduleBase);
IDiaSession diaSession = s_perModuleDebugInfo[moduleIndex];
if (diaSession != null)
{
return(diaSession);
}
string modulePath = RuntimeAugments.TryGetFullPathToApplicationModule(moduleBase);
if (modulePath == null)
{
return(null);
}
int indexOfLastDot = modulePath.LastIndexOf('.');
if (indexOfLastDot == -1)
{
return(null);
}
IDiaDataSource diaDataSource = GetDiaDataSource();
if (diaDataSource == null)
{
return(null);
}
// Look for .pdb next to .exe / dll - if it's not there, bail.
String pdbPath = modulePath.Substring(0, indexOfLastDot) + ".pdb";
int hr = diaDataSource.LoadDataFromPdb(pdbPath);
if (hr != S_OK)
{
return(null);
}
hr = diaDataSource.OpenSession(out diaSession);
if (hr != S_OK)
{
return(null);
}
s_perModuleDebugInfo[moduleIndex] = diaSession;
return(diaSession);
}
/// <summary>
/// Locate and lazily load debug info for the native app module overlapping given
/// virtual address.
/// </summary>
/// <param name="ip">Instruction pointer address (code address for the lookup)</param>
/// <param name="rva">Output VA relative to module base</param>
private static IDiaSession GetDiaSession(IntPtr ip, out int rva)
{
if (ip == IntPtr.Zero)
{
rva = -1;
return(null);
}
IntPtr moduleBase = RuntimeAugments.GetOSModuleFromPointer(ip);
if (moduleBase == IntPtr.Zero)
{
rva = -1;
return(null);
}
rva = (int)(ip.ToInt64() - moduleBase.ToInt64());
if (s_loadedModules == null)
{
// Lazily create the map from module bases to debug info
s_loadedModules = new Dictionary <IntPtr, IDiaSession>();
}
// Locate module index based on base address
IDiaSession diaSession;
if (s_loadedModules.TryGetValue(moduleBase, out diaSession))
{
return(diaSession);
}
string modulePath = RuntimeAugments.TryGetFullPathToApplicationModule(moduleBase);
if (modulePath == null)
{
return(null);
}
int indexOfLastDot = modulePath.LastIndexOf('.');
if (indexOfLastDot == -1)
{
return(null);
}
IDiaDataSource diaDataSource = GetDiaDataSource();
if (diaDataSource == null)
{
return(null);
}
// Look for .pdb next to .exe / dll - if it's not there, bail.
String pdbPath = modulePath.Substring(0, indexOfLastDot) + ".pdb";
int hr = diaDataSource.LoadDataFromPdb(pdbPath);
if (hr != S_OK)
{
return(null);
}
hr = diaDataSource.OpenSession(out diaSession);
if (hr != S_OK)
{
return(null);
}
s_loadedModules.Add(moduleBase, diaSession);
return(diaSession);
}
