This patch is trying to fix the array index out of bounds error. I observed it in (https://reviews.llvm.org/harbormaster/unit/view/99638/).
Reviewed By: jhenderson, MaskRay
Differential Revision: https://reviews.llvm.org/D82139
template <typename T> void DWARFYAML::VisitorImpl<T>::traverseDebugInfo() {
for (auto &Unit : DebugInfo.CompileUnits) {
onStartCompileUnit(Unit);
+ if (Unit.Entries.empty())
+ continue;
auto FirstAbbrevCode = Unit.Entries[0].AbbrCode;
for (auto &Entry : Unit.Entries) {
Entries:
- AbbrCode: 0
Values: []
+
+## h) Test that yaml2obj doesn't crash when the 'Entries' of a compilation unit is empty.
+
+# RUN: yaml2obj --docnum=8 %s -o %t8.o
+# RUN: llvm-readelf --hex-dump=.debug_info %t8.o | \
+# RUN: FileCheck %s --check-prefix=EMPTY-ENTRIES --match-full-lines
+
+# EMPTY-ENTRIES: Hex dump of section '.debug_info':
+# EMPTY-ENTRIES-NEXT: 0x00000000 34120000 05000204 34120000 4.......4...
+# EMPTY-ENTRIES-EMPTY:
+## ^- 'Entries' is empty
+
+--- !ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_EXEC
+ Machine: EM_X86_64
+DWARF:
+ debug_info:
+ - Length:
+ TotalLength: 0x1234
+ Version: 5
+ UnitType: DW_UT_type
+ AbbrOffset: 0x1234
+ AddrSize: 4
+ Entries: []