mstorsjo added a comment.
When testing this patch, I ran into crashes in the
`SymbolFile/NativePDB/load-pdb.cpp` testcase. To fix it, I had to add a change
like this:
diff --git a/lldb/source/Plugins/SymbolVendor/PECOFF/SymbolVendorPECOFF.cpp
b/lldb/source/Plugins/SymbolVendor/PECOFF/SymbolVendorPECOFF.cpp
index 26df0035b37c..e08753b86d5b 100644
--- a/lldb/source/Plugins/SymbolVendor/PECOFF/SymbolVendorPECOFF.cpp
+++ b/lldb/source/Plugins/SymbolVendor/PECOFF/SymbolVendorPECOFF.cpp
@@ -108,6 +108,8 @@ SymbolVendorPECOFF::CreateInstance(const lldb::ModuleSP
&module_sp,
// that.
SectionList *module_section_list = module_sp->GetSectionList();
SectionList *objfile_section_list = dsym_objfile_sp->GetSectionList();
+ if (!objfile_section_list || !module_section_list)
+ return nullptr;
static const SectionType g_sections[] = {
eSectionTypeDWARFDebugAbbrev, eSectionTypeDWARFDebugAranges,
Also, when built with assertions enabled (which often is to prefer during
development, to catch things before the buildbots do), reading the debuglink
info failed an assert:
lldb/source/Utility/DataExtractor.cpp:135:
lldb_private::DataExtractor::DataExtractor(const void*, lldb::offset_t,
lldb::ByteOrder, uint32_t, uint32_t): Assertion `addr_size >= 1 && addr_size <=
8' failed.
This is easy to fix with a change like this:
diff --git a/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
b/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
index ba4612178be7..657fcdc5af6d 100644
--- a/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
+++ b/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
@@ -63,7 +63,7 @@ static bool GetDebugLinkContents(const
llvm::object::COFFObjectFile &coff_obj,
}
DataExtractor data(
content->data(), content->size(),
- coff_obj.isLittleEndian() ? eByteOrderLittle : eByteOrderBig, 0);
+ coff_obj.isLittleEndian() ? eByteOrderLittle : eByteOrderBig, 4);
lldb::offset_t gnu_debuglink_offset = 0;
gnu_debuglink_file = data.GetCStr(&gnu_debuglink_offset);
// Align to the next 4-byte offset
If it's ok with you, I can squash these changes (plus a rewording regarding GNU
ld and the codeview build ID) and push the patch.
================
Comment at: lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp:96
+
+ // The GNU linker does not write a PDB build id, so we should fall back to
+ // using the crc from .gnu_debuglink if it exists, just like how
ObjectFileELF
----------------
Actually, the GNU linker does write such a build id if you pass it
`-Wl,--build-id`, but it's not default like in LLD.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D126367/new/
https://reviews.llvm.org/D126367
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