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Merged
merged 1 commit into from
Feb 6, 2025
Merged

Symbolize line zero as if no source info is available #124846

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2 changes: 1 addition & 1 deletion llvm/lib/DebugInfo/DWARF/DWARFContext.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1869,7 +1869,7 @@ DWARFContext::getInliningInfoForAddress(object::SectionedAddress Address,
LineTable->getFileLineInfoForAddress(
{Address.Address, Address.SectionIndex}, Spec.ApproximateLine,
CU->getCompilationDir(), Spec.FLIKind, Frame);
} else {
} else if (CallLine != 0) {
// Otherwise, use call file, call line and call column from
// previous DIE in inlined chain.
if (LineTable)
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3 changes: 2 additions & 1 deletion llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp
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Expand Up @@ -1508,7 +1508,8 @@ bool DWARFDebugLine::LineTable::getFileLineInfoForAddress(
return false;
// Take file number and line/column from the row.
const auto &Row = Rows[RowIndex];
if (!getFileNameByIndex(Row.File, CompDir, Kind, Result.FileName))
if (Row.Line == 0 ||
!getFileNameByIndex(Row.File, CompDir, Kind, Result.FileName))
return false;
Result.Line = Row.Line;
Result.Column = Row.Column;
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4 changes: 2 additions & 2 deletions llvm/test/tools/llvm-symbolizer/skip-line-zero.s
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Expand Up @@ -20,13 +20,13 @@
## Check that without '--skip-line-zero', line zero is displayed for a line-table entry which has no source correspondence.
# RUN: llvm-symbolizer --obj=%t.o -f=none 0x16d4 | FileCheck --strict-whitespace --match-full-lines --check-prefix=DISABLE %s

# DISABLE:main.c:0:0
# DISABLE:??:0:0

## Check that the '--skip-line-zero' does not cross sequence boundaries.
## If it fails to find in the current sequence then line zero is returned for the queried address.
# RUN: llvm-symbolizer --obj=%t.o -f=none --skip-line-zero 0x16c0 | FileCheck --strict-whitespace --match-full-lines --check-prefix=FAIL-ACROSS-SEQ %s

# FAIL-ACROSS-SEQ:main.c:0:0
# FAIL-ACROSS-SEQ:??:0:0

## Check that with '--skip-line-zero', the last non-zero line in the current sequence is displayed.
# RUN: llvm-symbolizer --obj=%t.o -f=none --skip-line-zero 0x1717 | FileCheck --strict-whitespace --match-full-lines --check-prefix=WITHIN-SEQ %s
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5 changes: 2 additions & 3 deletions llvm/test/tools/llvm-symbolizer/sym-verbose.test
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Expand Up @@ -50,13 +50,12 @@ CHECK-NEXT: Column: 0

CHECK: 0x4005ad
CHECK-NEXT: foo
CHECK-NEXT: Filename: /tmp{{[\\/]}}discrim.c
CHECK-NEXT: Filename: ??
CHECK-NEXT: Function start filename: /tmp{{[\\/]}}discrim.c
CHECK-NEXT: Function start line: 4
CHECK-NEXT: Function start address: 0x400590
CHECK-NEXT: Line: 0
CHECK-NEXT: Column: 30
CHECK-NEXT: Discriminator: 4
CHECK-NEXT: Column: 0
CHECK-NEXT: main
CHECK-NEXT: Filename: /tmp{{[\\/]}}discrim.c
CHECK-NEXT: Function start filename: /tmp{{[\\/]}}discrim.c
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