[lldb] Add SBProcess methods for get/set/use address masks (#83095)
I'm reviving a patch from phabracator, https://reviews.llvm.org/D155905
which was approved but I wasn't thrilled with all the API I was adding
to SBProcess for all of the address mask types / memory regions. In this
update, I added enums to control type address mask type (code, data,
any) and address space specifiers (low, high, all) with defaulted
arguments for the most common case. I originally landed this via
https://github.com/llvm/llvm-project/pull/83095 but it failed on CIs
outside of arm64 Darwin so I had to debug it on more environments
and update the patch.
This patch is also fixing a bug in the "addressable bits to address
mask" calculation I added in AddressableBits::SetProcessMasks. If lldb
were told that 64 bits are valid for addressing, this method would
overflow the calculation and set an invalid mask. Added tests to check
this specific bug while I was adding these APIs.
This patch changes the value of "no mask set" from 0 to
LLDB_INVALID_ADDRESS_MASK, which is UINT64_MAX. A mask of all 1's
means "no bits are used for addressing" which is an impossible mask,
whereas a mask of 0 means "all bits are used for addressing" which
is possible.
I added a base class implementation of ABI::FixCodeAddress and
ABI::FixDataAddress that will apply the Process mask values if they
are set to a value other than LLDB_INVALID_ADDRESS_MASK.
I updated all the callers/users of the Mask methods which were
handling a value of 0 to mean invalid mask to use
LLDB_INVALID_ADDRESS_MASK.
I added code to the all AArch64 ABI Fix* methods to apply the
Highmem masks if they have been set. These will not be set on a
Linux environment, but in TestAddressMasks.py I test the highmem
masks feature for any AArch64 target, so all AArch64 ABI plugins
must handle it.
rdar://123530562
aeaa11aeac