Set breakpoint on COM class method in windbg

Is there some way, similar to "bm Module!Symbol" to set a breakpoint on a specific method of a COM class in windbg? It looks like a COM DLL only exports four symbols (DllCanUnloadNow, DllGetC开发者_运维问答lassObject, DllRegisterServer, and DllUnregisterServer), so the usual "bm" approach doesn't work. I'm assuming there's some other way to do it, but I haven't been able to find it in the past hour or so.

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You should be able to use bu (unresolved breakpoint). I believe the syntax is as follows, but my memory may be rusty:

bu MyDll!MyClass::MyMethod

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COM methods are still regular symbols, even if they're not exported. Say you have MyFoo.dll which contains a MyBar::Baz() method. In WinDbg if you have symbols loaded you can eXamine the symbols with:

X MyFoo!*Baz*
00007ffa`204cbb00 MyFoo!MyBar::Baz (void)

You can set a breakpoint on it with

bp MyFoo!MyBar::Baz