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| author | Hsiangkai Wang <hsiangkai@gmail.com> | 2018-07-31 14:48:32 +0000 |
|---|---|---|
| committer | Hsiangkai Wang <hsiangkai@gmail.com> | 2018-07-31 14:48:32 +0000 |
| commit | cbc58ada99c2d0f9a0cf8e23354d663f05c40f75 (patch) | |
| tree | 1720d6145a26ecba5ac5a76a10f17108b4b31578 /llvm/lib/CodeGen/ShadowStackGCLowering.cpp | |
| parent | ab79414f7b29c8a82eebcc6daf055c8251641558 (diff) | |
| download | bcm5719-llvm-cbc58ada99c2d0f9a0cf8e23354d663f05c40f75.tar.gz bcm5719-llvm-cbc58ada99c2d0f9a0cf8e23354d663f05c40f75.zip | |
[DebugInfo] Generate DWARF debug information for labels.
There are two forms for label debug information in DWARF format.
1. Labels in a non-inlined function:
DW_TAG_label
DW_AT_name
DW_AT_decl_file
DW_AT_decl_line
DW_AT_low_pc
2. Labels in an inlined function:
DW_TAG_label
DW_AT_abstract_origin
DW_AT_low_pc
We will collect label information from DBG_LABEL. Before every DBG_LABEL,
we will generate a temporary symbol to denote the location of the label.
The symbol could be used to get DW_AT_low_pc afterwards. So, we create a
mapping between 'inlined label' and DBG_LABEL MachineInstr in DebugHandlerBase.
The DBG_LABEL in the mapping is used to query the symbol before it.
The AbstractLabels in DwarfCompileUnit is used to process labels in inlined
functions.
We also keep a mapping between scope and labels in DwarfFile to help to
generate correct tree structure of DIEs.
It also generates label debug information under global isel.
Differential Revision: https://reviews.llvm.org/D45556
llvm-svn: 338390
Diffstat (limited to 'llvm/lib/CodeGen/ShadowStackGCLowering.cpp')
0 files changed, 0 insertions, 0 deletions
