[Lldb-commits] [lldb] [lldb] Add SBProcess methods for get/set/use address masks (PR #83095)
Will Hawkins via lldb-commits
lldb-commits at lists.llvm.org
Wed Feb 28 08:35:43 PST 2024
================
@@ -407,6 +407,117 @@ class LLDB_API SBProcess {
/// the process isn't loaded from a core file.
lldb::SBFileSpec GetCoreFile();
+ /// \{
+ /// \group Mask Address Methods
+ ///
+ /// \a type
+ /// All of the methods in this group take \a type argument
+ /// which is an AddressMaskType enum value.
+ /// There can be different address masks for code addresses and
+ /// data addresses, this argument can select which to get/set,
+ /// or to use when clearing non-addressable bits from an address.
+ /// On AArch32 code with arm+thumb code, where instructions start
+ /// on even addresses, the 0th bit may be used to indicate that
+ /// a function is thumb code. On such a target, the eAddressMaskTypeCode
+ /// may clear the 0th bit from an address to get the actual address.
+ ///
+ /// \a addr_range
+ /// Many of the methods in this group take an \a addr_range argument
+ /// which is an AddressMaskRange enum value.
+ /// Needing to specify the address range is highly unusual, and the
+ /// default argument can be used in nearly all circumstances.
+ /// On some architectures like AArch64, it is possible to have
+ /// different page table setups for low and high memory, so different
+ /// numbers of bits relevant to addressing. It is possible to have
+ /// a program running in one half of memory and accessing the other
+ /// as heap, so we need to maintain two different sets of address masks
+ /// to debug this correctly.
+
+ /// Get the current address mask that will be applied to addresses
+ /// before reading from memory.
+ ///
+ /// \param[in] type
+ /// See \ref Mask Address Methods descripton of this argument.
----------------
hawkinsw wrote:
```suggestion
/// See \ref Mask Address Methods description of this argument.
```
https://github.com/llvm/llvm-project/pull/83095
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