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Support reading section ".gnu_debugaltlink" 

Differential revision: https://reviews.llvm.org/D40468

llvm-svn: 331148
This commit is contained in:
Jan Kratochvil 2018-04-29 19:47:48 +00:00
parent 288c73e7be
commit e4777a9df5
14 changed files with 51 additions and 5 deletions
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2
lldb/include/lldb/Core/Section.h
View File

@ -182,6 +182,8 @@ public:
lldb::SectionType GetType() const { return m_type; }
const char *GetTypeAsCString() const;
lldb::SectionSP GetParent() const { return m_parent_wp.lock(); }
bool IsThreadSpecific() const { return m_thread_specific; }

1
lldb/include/lldb/lldb-enumerations.h
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@ -656,6 +656,7 @@ enum SectionType {
eSectionTypeGoSymtab,
eSectionTypeAbsoluteAddress, // Dummy section for symbols with absolute
// address
eSectionTypeDWARFGNUDebugAltLink,
eSectionTypeOther
};

1
lldb/lit/Modules/build-id-case.yaml
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@ -5,6 +5,7 @@
# RUN: lldb-test module-sections %t/stripped.out | FileCheck %s
# CHECK: Name: .debug_frame
# CHECK-NEXT: Type: dwarf-frame
# CHECK-NEXT: VM size: 0
# CHECK-NEXT: File size: 8

2
lldb/lit/Modules/compressed-sections.yaml
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@ -18,12 +18,14 @@ Sections:
Content: deadbeefbaadf00d
# CHECK: Name: .hello_elf
# CHECK-NEXT: Type: regular
# CHECK-NEXT: VM size: 0
# CHECK-NEXT: File size: 28
# CHECK-NEXT: Data:
# CHECK-NEXT: 20304050 60708090
# CHECK: Name: .bogus
# CHECK-NEXT: Type: regular
# CHECK-NEXT: VM size: 0
# CHECK-NEXT: File size: 8
# CHECK-NEXT: Data:

25
lldb/lit/Modules/dwarf-gnu-debugaltlink.yaml Normal file
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@ -0,0 +1,25 @@
# RUN: yaml2obj %s > %t
# RUN: lldb-test module-sections %t | FileCheck %s
# CHECK: Name: .gnu_debugaltlink
# CHECK-NEXT: Type: dwarf-gnu-debugaltlink
# CHECK-NEXT: VM size: 0
# CHECK-NEXT: File size: 8
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_DYN
Machine: EM_X86_64
Entry: 0x00000000000007A0
Sections:
- Name: .debug_info
Type: SHT_PROGBITS
AddressAlign: 0x0000000000000001
Content: DEADBEEFBAADF00D
- Name: .gnu_debugaltlink
Type: SHT_PROGBITS
AddressAlign: 0x0000000000000001
Content: DEADBEEFBAADF00D
...

9
lldb/source/Core/Section.cpp
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@ -27,8 +27,8 @@ class DataExtractor;
using namespace lldb;
using namespace lldb_private;
static const char *GetSectionTypeAsCString(lldb::SectionType sect_type) {
switch (sect_type) {
const char *Section::GetTypeAsCString() const {
switch (m_type) {
case eSectionTypeInvalid:
return "invalid";
case eSectionTypeCode:
@ -117,6 +117,8 @@ static const char *GetSectionTypeAsCString(lldb::SectionType sect_type) {
return "go-symtab";
case eSectionTypeAbsoluteAddress:
return "absolute";
case eSectionTypeDWARFGNUDebugAltLink:
return "dwarf-gnu-debugaltlink";
case eSectionTypeOther:
return "regular";
}
@ -283,8 +285,7 @@ int Section::Compare(const Section &a, const Section &b) {
void Section::Dump(Stream *s, Target *target, uint32_t depth) const {
// s->Printf("%.*p: ", (int)sizeof(void*) * 2, this);
s->Indent();
s->Printf("0x%8.8" PRIx64 " %-16s ", GetID(),
GetSectionTypeAsCString(m_type));
s->Printf("0x%8.8" PRIx64 " %-16s ", GetID(), GetTypeAsCString());
bool resolved = true;
addr_t addr = LLDB_INVALID_ADDRESS;

1
lldb/source/Expression/IRExecutionUnit.cpp
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@ -1100,6 +1100,7 @@ bool IRExecutionUnit::CommitOneAllocation(lldb::ProcessSP &process_sp,
case lldb::eSectionTypeDWARFAppleTypes:
case lldb::eSectionTypeDWARFAppleNamespaces:
case lldb::eSectionTypeDWARFAppleObjC:
case lldb::eSectionTypeDWARFGNUDebugAltLink:
error.Clear();
break;
default:

3
lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
View File

@ -1823,6 +1823,7 @@ void ObjectFileELF::CreateSections(SectionList &unified_section_list) {
static ConstString g_sect_name_arm_exidx(".ARM.exidx");
static ConstString g_sect_name_arm_extab(".ARM.extab");
static ConstString g_sect_name_go_symtab(".gosymtab");
static ConstString g_sect_name_dwarf_gnu_debugaltlink(".gnu_debugaltlink");
SectionType sect_type = eSectionTypeOther;
@ -1913,6 +1914,8 @@ void ObjectFileELF::CreateSections(SectionList &unified_section_list) {
sect_type = eSectionTypeARMextab;
else if (name == g_sect_name_go_symtab)
sect_type = eSectionTypeGoSymtab;
else if (name == g_sect_name_dwarf_gnu_debugaltlink)
sect_type = eSectionTypeDWARFGNUDebugAltLink;
const uint32_t permissions =
((header.sh_flags & SHF_ALLOC) ? ePermissionsReadable : 0u) |

1
lldb/source/Plugins/ObjectFile/Mach-O/ObjectFileMachO.cpp
View File

@ -1212,6 +1212,7 @@ AddressClass ObjectFileMachO::GetAddressClass(lldb::addr_t file_addr) {
case eSectionTypeDWARFAppleTypes:
case eSectionTypeDWARFAppleNamespaces:
case eSectionTypeDWARFAppleObjC:
case eSectionTypeDWARFGNUDebugAltLink:
return eAddressClassDebug;
case eSectionTypeEHFrame:

5
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
View File

@ -682,6 +682,11 @@ const DWARFDataExtractor &SymbolFileDWARF::get_apple_objc_data() {
return GetCachedSectionData(eSectionTypeDWARFAppleObjC, m_data_apple_objc);
}
const DWARFDataExtractor &SymbolFileDWARF::get_gnu_debugaltlink() {
return GetCachedSectionData(eSectionTypeDWARFGNUDebugAltLink,
m_data_gnu_debugaltlink);
}
DWARFDebugAbbrev *SymbolFileDWARF::DebugAbbrev() {
if (m_abbr.get() == NULL) {
const DWARFDataExtractor &debug_abbrev_data = get_debug_abbrev_data();

2
lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
View File

@ -250,6 +250,7 @@ public:
const lldb_private::DWARFDataExtractor &get_apple_types_data();
const lldb_private::DWARFDataExtractor &get_apple_namespaces_data();
const lldb_private::DWARFDataExtractor &get_apple_objc_data();
const lldb_private::DWARFDataExtractor &get_gnu_debugaltlink();
DWARFDebugAbbrev *DebugAbbrev();
@ -495,6 +496,7 @@ protected:
DWARFDataSegment m_data_apple_types;
DWARFDataSegment m_data_apple_namespaces;
DWARFDataSegment m_data_apple_objc;
DWARFDataSegment m_data_gnu_debugaltlink;
// The unique pointer items below are generated on demand if and when someone
// accesses

2
lldb/source/Plugins/SymbolVendor/ELF/SymbolVendorELF.cpp
View File

@ -134,7 +134,7 @@ SymbolVendorELF::CreateInstance(const lldb::ModuleSP &module_sp,
eSectionTypeDWARFDebugMacInfo, eSectionTypeDWARFDebugPubNames,
eSectionTypeDWARFDebugPubTypes, eSectionTypeDWARFDebugRanges,
eSectionTypeDWARFDebugStr, eSectionTypeDWARFDebugStrOffsets,
eSectionTypeELFSymbolTable,
eSectionTypeELFSymbolTable, eSectionTypeDWARFGNUDebugAltLink,
};
for (size_t idx = 0; idx < sizeof(g_sections) / sizeof(g_sections[0]);
++idx) {

1
lldb/source/Symbol/ObjectFile.cpp
View File

@ -363,6 +363,7 @@ AddressClass ObjectFile::GetAddressClass(addr_t file_addr) {
case eSectionTypeDWARFAppleTypes:
case eSectionTypeDWARFAppleNamespaces:
case eSectionTypeDWARFAppleObjC:
case eSectionTypeDWARFGNUDebugAltLink:
return eAddressClassDebug;
case eSectionTypeEHFrame:
case eSectionTypeARMexidx:

1
lldb/tools/lldb-test/lldb-test.cpp
View File

@ -213,6 +213,7 @@ static void dumpModules(Debugger &Dbg) {
assert(S);
Printer.formatLine("Index: {0}", I);
Printer.formatLine("Name: {0}", S->GetName().GetStringRef());
Printer.formatLine("Type: {0}", S->GetTypeAsCString());
Printer.formatLine("VM size: {0}", S->GetByteSize());
Printer.formatLine("File size: {0}", S->GetFileSize());