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| author | Matthias Krüger <matthias.krueger@famsik.de> | 2024-08-21 18:15:01 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-08-21 18:15:01 +0200 |
| commit | dea325e583adfcb9fec771da547dc304e79a5ee2 (patch) | |
| tree | 504b1213a2f410b0570185c2a31f5bc9b4a337cf /compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp | |
| parent | 982c6f8721416431ec62bb0b9105c0578a9fc603 (diff) | |
| parent | 4e9725cd2f5327f65f881c59d6bcbae46308318e (diff) | |
| download | rust-dea325e583adfcb9fec771da547dc304e79a5ee2.tar.gz rust-dea325e583adfcb9fec771da547dc304e79a5ee2.zip | |
Rollup merge of #128627 - khuey:DUMMY_SP-line-no, r=nnethercote
Special case DUMMY_SP to emit line 0/column 0 locations on DWARF platforms.
Line 0 has a special meaning in DWARF. From the version 5 spec:
The compiler may emit the value 0 in cases
where an instruction cannot be attributed to any
source line.
DUMMY_SP spans cannot be attributed to any line. However, because rustc internally stores line numbers starting at zero, lookup_debug_loc() adjusts every line number by one. Special casing DUMMY_SP to actually emit line 0 ensures rustc communicates to the debugger that there's no meaningful source code for this instruction, rather than telling the debugger to jump to line 1 randomly.
Diffstat (limited to 'compiler/rustc_llvm/llvm-wrapper/CoverageMappingWrapper.cpp')
0 files changed, 0 insertions, 0 deletions