Lang Hames 9eb4939b86 [ORC] Allow JITDylib::getDFSLinkOrder and friends to fail for defunct JITDylibs. ...

Calls to JITDylib's getDFSLinkOrder and getReverseDFSLinkOrder methods (both
static an non-static versions) are now valid to make on defunct JITDylibs, but
will return an error if any JITDylib in the link order is defunct.

This means that platforms can safely lookup link orders by name in response to
jit-dlopen calls from the ORC runtime, even if the call names a defunct
JITDylib -- the call will just fail with an error.

2022-01-20 17:45:32 +11:00

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