[llvm] 5a8f290 - [llvm-gsymutil] Print one-time DWO file missing warning under --quiet flag (#79882)
via llvm-commits
llvm-commits at lists.llvm.org
Wed Jan 31 21:34:07 PST 2024
Author: Wanyi
Date: 2024-02-01T00:34:03-05:00
New Revision: 5a8f290ded52c218510369f3a7ae66bee1cac99f
URL: https://github.com/llvm/llvm-project/commit/5a8f290ded52c218510369f3a7ae66bee1cac99f
DIFF: https://github.com/llvm/llvm-project/commit/5a8f290ded52c218510369f3a7ae66bee1cac99f.diff
LOG: [llvm-gsymutil] Print one-time DWO file missing warning under --quiet flag (#79882)
FileCheck test added
```
./bin/llvm-lit -sv llvm/test/tools/llvm-gsymutil/X86/elf-dwo.yaml
```
Manual test steps:
- Create binary with split-dwarf:
```
clang++ -g -gdwarf-4 -gsplit-dwarf main.cpp -o main_split
```
- Remove or remane the dwo file to a different name so llvm-gsymutil can't find it
```
mv main_split-main.dwo main_split-main__.dwo
```
- Now run llvm-gsymutil conversion, it should print out warning with and
without the `--quiet` flag
```
$ ./bin/llvm-gsymutil --convert=./main_split
Input file: ./main_split
Output file (x86_64): ./main_split.gsym
warning: Unable to retrieve DWO .debug_info section for main_split-main.dwo
Loaded 0 functions from DWARF.
Loaded 12 functions from symbol table.
Pruned 0 functions, ended with 12 total
```
```
$ ./bin/llvm-gsymutil --convert=./main_split --quiet
Input file: ./main_split
Output file (x86_64): ./main_split.gsym
warning: Unable to retrieve DWO .debug_info section for some object files. (Remove the --quiet flag for full output)
Pruned 0 functions, ended with 12 total
```
Added:
llvm/test/tools/llvm-gsymutil/X86/elf-dwo.yaml
Modified:
llvm/lib/DebugInfo/GSYM/DwarfTransformer.cpp
Removed:
################################################################################
diff --git a/llvm/lib/DebugInfo/GSYM/DwarfTransformer.cpp b/llvm/lib/DebugInfo/GSYM/DwarfTransformer.cpp
index 0b225376349ec..6268c7845a142 100644
--- a/llvm/lib/DebugInfo/GSYM/DwarfTransformer.cpp
+++ b/llvm/lib/DebugInfo/GSYM/DwarfTransformer.cpp
@@ -537,17 +537,27 @@ void DwarfTransformer::handleDie(raw_ostream *OS, CUInfo &CUI, DWARFDie Die) {
Error DwarfTransformer::convert(uint32_t NumThreads, raw_ostream *OS) {
size_t NumBefore = Gsym.getNumFunctionInfos();
+ std::once_flag flag;
auto getDie = [&](DWARFUnit &DwarfUnit) -> DWARFDie {
DWARFDie ReturnDie = DwarfUnit.getUnitDIE(false);
if (DwarfUnit.getDWOId()) {
DWARFUnit *DWOCU = DwarfUnit.getNonSkeletonUnitDIE(false).getDwarfUnit();
- if (OS && !DWOCU->isDWOUnit()) {
- std::string DWOName = dwarf::toString(
- DwarfUnit.getUnitDIE().find(
- {dwarf::DW_AT_dwo_name, dwarf::DW_AT_GNU_dwo_name}),
- "");
- *OS << "warning: Unable to retrieve DWO .debug_info section for "
- << DWOName << "\n";
+ if (!DWOCU->isDWOUnit()) {
+ if (OS) {
+ std::string DWOName = dwarf::toString(
+ DwarfUnit.getUnitDIE().find(
+ {dwarf::DW_AT_dwo_name, dwarf::DW_AT_GNU_dwo_name}),
+ "");
+ *OS << "warning: Unable to retrieve DWO .debug_info section for "
+ << DWOName << "\n";
+ } else {
+ std::call_once(flag, []() {
+ outs()
+ << "warning: Unable to retrieve DWO .debug_info section for "
+ "some "
+ "object files. (Remove the --quiet flag for full output)\n";
+ });
+ }
} else {
ReturnDie = DWOCU->getUnitDIE(false);
}
diff --git a/llvm/test/tools/llvm-gsymutil/X86/elf-dwo.yaml b/llvm/test/tools/llvm-gsymutil/X86/elf-dwo.yaml
new file mode 100644
index 0000000000000..109f2fe73e695
--- /dev/null
+++ b/llvm/test/tools/llvm-gsymutil/X86/elf-dwo.yaml
@@ -0,0 +1,565 @@
+## Test loading an ELF file with split DWARF.
+## First we make the ELF file and dwo file from yaml,
+## then we test converting the ELF file with and without a valid dwo
+
+## RUN: yaml2obj %s -o %t
+## RUN: llvm-gsymutil --convert=%t -o %t.gsym | FileCheck %s --check-prefix=WARNING
+## RUN: llvm-gsymutil --convert=%t -o %t.gsym --quiet | FileCheck %s --check-prefix=WARNING-QUIET
+
+## WARNING: Input file: {{.*\.yaml\.tmp}}
+## WARNING: Output file (x86_64): {{.*\.yaml\.tmp\.gsym}}
+## WARNING: warning: Unable to retrieve DWO .debug_info section for main_split-main.dwo
+## WARNING: Loaded 0 functions from DWARF.
+## WARNING: Loaded 10 functions from symbol table.
+## WARNING: Pruned 0 functions, ended with 10 total
+
+## WARNING-QUIET: Input file: {{.*\.yaml\.tmp}}
+## WARNING-QUIET: Output file (x86_64): {{.*\.yaml\.tmp\.gsym}}
+## WARNING-QUIET: warning: Unable to retrieve DWO .debug_info section for some object files. (Remove the --quiet flag for full output)
+## WARNING-QUIET: Pruned 0 functions, ended with 10 total
+
+
+
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+ - '/tmp/test_dwo'
+ - main_split-main.dwo
+...
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