[cfe-dev] Call frame information query

[Robinson, Paul via cfe-dev]

You are asking on cfe-dev but Clang does not emit these directly.  LLVM generates them.
DWARF CFI is used to inform the debugger about how machine registers are saved/restored in a call frame.  Are you asking how LLVM decides when to generate a CFI instruction?  Or are you wondering how CFI instructions turn into a .debug_frame section?
In either case, asking a more specific question on llvm-dev would get you a more informed answer.
--paulr

From: cfe-dev [mailto:cfe-dev-bounces at lists.llvm.org] On Behalf Of Siddharth Shankar Swain via cfe-dev
Sent: Monday, September 25, 2017 12:19 AM
To: Clang Dev
Subject: [cfe-dev] Call frame information query

Hi,
Can anyone suggest how the CFI instructions are used to provide necessary information to the debugger ( lldb ) through the respective dwarf  entries  for CFI? It will be better if someone can point out to the implementation details .
Thanks,
Siddharth
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