[NFC][RemoteInspection] Add an opaque AddressSpace field to RemoteAddress #82972
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This patch changes RemoteAbsolutePointer to store both the symbol and the resolved address. This allows us to retire some ugly workarounds to deal with non-symbolic addresses and it fixes code paths that would need these workarounds, but haven't implemented them yet (i.e., the pack shape handling in the symbolicReferenceResolver in MetadatyaReader. Addresses parts of rdar://146273066. rdar://153687085 (cherry picked from commit 9381a54)
…ress Add an extra opaque field to AddressSpace, which can be used by clients of RemoteInspection to distinguish between different address spaces. LLDB employs an optimization where it reads memory from files instead of the running process whenever it can to speed up memory reads (these can be slow when debugging something over a network). To do this, it needs to keep track whether an address originated from a process or a file. It currently distinguishes addresses by setting an unused high bit on the address, but because of pointer authentication this is not a reliable solution. In order to keep this optimization working, this patch adds an extra opaque AddressSpace field to RemoteAddress, which LLDB can use on its own implementation of MemoryReader to distinguish between addresses. This patch is NFC for the other RemoteInspection clients, as it adds extra information to RemoteAddress, which is entirely optional and if unused should not change the behavior of the library. Although this patch is quite big the changes are largely mechanical, replacing threading StoredPointer with RemoteAddress. rdar://148361743 (cherry picked from commit 58df553)
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