Add a new 'eRegisterInLiveRegisterContext' RegisterLocation to track
a register value that is live in the stack frame 0 register context.
Fixes a problem where retrieving a register value on stack frame #n
would involved O(n!) stack frame checks. This could be very slow on
a deep stack when retrieving register values that had not been
modified/saved by any of the stack frames. Not common, but annoying
when it was hit.
<rdar://problem/19010211>
llvm-svn: 223843
diff --git a/lldb/source/Plugins/Process/Utility/UnwindLLDB.h b/lldb/source/Plugins/Process/Utility/UnwindLLDB.h
index eb54003..35d85e2 100644
--- a/lldb/source/Plugins/Process/Utility/UnwindLLDB.h
+++ b/lldb/source/Plugins/Process/Utility/UnwindLLDB.h
@@ -48,7 +48,8 @@
eRegisterSavedAtMemoryLocation, // register is saved at a specific word of target mem (target_memory_location)
eRegisterInRegister, // register is available in a (possible other) register (register_number)
eRegisterSavedAtHostMemoryLocation, // register is saved at a word in lldb's address space
- eRegisterValueInferred // register val was computed (and is in inferred_value)
+ eRegisterValueInferred, // register val was computed (and is in inferred_value)
+ eRegisterInLiveRegisterContext // register value is in a live (stack frame #0) register
};
int type;
union