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This revision was automatically updated to reflect the committed changes.
Closed by commit rG979ca1c05f83: Defer the decision whether to use the CU or TU
index until after reading the… (authored by jgorbe).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D96194/new/
https://reviews.llvm.org/D96194
Files:
lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.h
lldb/test/Shell/SymbolFile/DWARF/dwarf5_tu_index_abbrev_offset.s
Index: lldb/test/Shell/SymbolFile/DWARF/dwarf5_tu_index_abbrev_offset.s
===================================================================
--- /dev/null
+++ lldb/test/Shell/SymbolFile/DWARF/dwarf5_tu_index_abbrev_offset.s
@@ -0,0 +1,323 @@
+## This test checks that lldb uses the abbrev_offset from .debug_tu_index when
+## reading TUs in the .debug_info section of a DWARF v5 DWP.
+##
+## The assembly here is, essentially, slightly hand-reduced output from
+## `clang -gsplit-dwarf -gdwarf-5 -fdebug-types-section`, with a manually-added
+## .debug_cu_index and a .debug_tu_index to create a DWP, and a twist: abbrevs
+## from the TU are listed *AFTER* abbrevs from the CU so that they don't begin
+## at offset 0.
+
+# RUN: llvm-mc --filetype=obj --triple x86_64 %s -o %t --defsym MAIN=1
+# RUN: llvm-mc --filetype=obj --triple x86_64 %s -o %t.dwp
+# RUN: %lldb %t -o "image lookup -t t1" -b | FileCheck %s
+# CHECK: struct t1
+
+.ifdef MAIN
+## Main file
+ .text
+ .globl main # -- Begin function main
+main: # @main
+.Lfunc_begin0:
+ pushq %rbp
+ movq %rsp, %rbp
+ xorl %eax, %eax
+ popq %rbp
+ retq
+.Lfunc_end0:
+ # -- End function
+ .section .debug_abbrev,"",@progbits
+ .byte 1 # Abbreviation Code
+ .byte 74 # DW_TAG_skeleton_unit
+ .byte 0 # DW_CHILDREN_no
+ .byte 118 # DW_AT_dwo_name
+ .byte 8 # DW_FORM_string
+ .byte 17 # DW_AT_low_pc
+ .byte 27 # DW_FORM_addrx
+ .byte 18 # DW_AT_high_pc
+ .byte 6 # DW_FORM_data4
+ .byte 115 # DW_AT_addr_base
+ .byte 23 # DW_FORM_sec_offset
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 0 # EOM(3)
+
+
+ .section .debug_info,"",@progbits
+.Lcu_begin0:
+ .long .Ldebug_info_end0-.Ldebug_info_start0 # Length of Unit
+.Ldebug_info_start0:
+ .short 5 # DWARF version number
+ .byte 4 # DWARF Unit Type
+ .byte 8 # Address Size (in bytes)
+ .long .debug_abbrev # Offset Into Abbrev. Section
+ .quad -8218585293556409984 # dwo_id
+ .byte 1 # Abbrev [1] 0x14:0x14 DW_TAG_skeleton_unit
+ .asciz "hello.dwo" # DW_AT_dwo_name
+ .byte 0 # DW_AT_low_pc
+ .long .Lfunc_end0-.Lfunc_begin0 # DW_AT_high_pc
+ .long .Laddr_table_base0 # DW_AT_addr_base
+.Ldebug_info_end0:
+
+
+ .section .debug_addr,"",@progbits
+ .long .Ldebug_addr_end0-.Ldebug_addr_start0 # Length of contribution
+.Ldebug_addr_start0:
+ .short 5 # DWARF version number
+ .byte 8 # Address size
+ .byte 0 # Segment selector size
+.Laddr_table_base0:
+ .quad .Lfunc_begin0
+.Ldebug_addr_end0:
+
+
+.else
+## DWP file
+ .section .debug_info.dwo,"e",@progbits
+ .long .Ldebug_info_dwo_end0-.Ldebug_info_dwo_start0 # Length of Unit
+.Ldebug_info_dwo_start0:
+ .short 5 # DWARF version number
+ .byte 6 # DWARF Unit Type
+ .byte 8 # Address Size (in bytes)
+ .long 0 # Offset Into Abbrev. Section
+ .quad -4149699470930386446 # Type Signature
+ .long 31 # Type DIE Offset
+ .byte 1 # Abbrev [1] 0x18:0xe DW_TAG_type_unit
+ .short 33 # DW_AT_language
+ .long 0 # DW_AT_stmt_list
+ .byte 2 # Abbrev [2] 0x1f:0x6 DW_TAG_structure_type
+ .byte 5 # DW_AT_calling_convention
+ .byte 3 # DW_AT_name
+ .byte 1 # DW_AT_byte_size
+ .byte 0 # DW_AT_decl_file
+ .byte 1 # DW_AT_decl_line
+ .byte 0 # End Of Children Mark
+.Ldebug_info_dwo_end0:
+ .long .Ldebug_info_dwo_end1-.Ldebug_info_dwo_start1 # Length of Unit
+.Ldebug_info_dwo_start1:
+ .short 5 # DWARF version number
+ .byte 5 # DWARF Unit Type
+ .byte 8 # Address Size (in bytes)
+ .long 0 # Offset Into Abbrev. Section
+ .quad -8218585293556409984
+ .byte 3 # Abbrev [3] 0x14:0x2f DW_TAG_compile_unit
+ .byte 4 # DW_AT_producer
+ .short 33 # DW_AT_language
+ .byte 5 # DW_AT_name
+ .byte 6 # DW_AT_dwo_name
+ .byte 4 # Abbrev [4] 0x1a:0x1b DW_TAG_subprogram
+ .byte 0 # DW_AT_low_pc
+ .long 8 # DW_AT_high_pc
+ .byte 1 # DW_AT_frame_base
+ .byte 86
+ .byte 0 # DW_AT_name
+ .byte 0 # DW_AT_decl_file
+ .byte 2 # DW_AT_decl_line
+ .long 53 # DW_AT_type
+ # DW_AT_external
+ .byte 5 # Abbrev [5] 0x29:0xb DW_TAG_variable
+ .byte 2 # DW_AT_location
+ .byte 145
+ .byte 120
+ .byte 2 # DW_AT_name
+ .byte 0 # DW_AT_decl_file
+ .byte 3 # DW_AT_decl_line
+ .long 57 # DW_AT_type
+ .byte 0 # End Of Children Mark
+ .byte 6 # Abbrev [6] 0x35:0x4 DW_TAG_base_type
+ .byte 1 # DW_AT_name
+ .byte 5 # DW_AT_encoding
+ .byte 4 # DW_AT_byte_size
+ .byte 7 # Abbrev [7] 0x39:0x9 DW_TAG_structure_type
+ # DW_AT_declaration
+ .quad -4149699470930386446 # DW_AT_signature
+ .byte 0 # End Of Children Mark
+.Ldebug_info_dwo_end1:
+
+
+
+ .section .debug_str.dwo,"eMS",@progbits,1
+.Linfo_string0:
+ .asciz "main"
+.Linfo_string1:
+ .asciz "int"
+.Linfo_string2:
+ .asciz "v1"
+.Linfo_string3:
+ .asciz "t1"
+.Linfo_string4:
+ .asciz "hand-tuned clang output"
+.Linfo_string5:
+ .asciz "test.cc"
+.Linfo_string6:
+ .asciz "test.dwo"
+
+
+ .section .debug_str_offsets.dwo,"e",@progbits
+ .long 32 # Length of String Offsets Set
+ .short 5
+ .short 0
+
+ .long .Linfo_string0-.debug_str.dwo
+ .long .Linfo_string1-.debug_str.dwo
+ .long .Linfo_string2-.debug_str.dwo
+ .long .Linfo_string3-.debug_str.dwo
+ .long .Linfo_string4-.debug_str.dwo
+ .long .Linfo_string5-.debug_str.dwo
+ .long .Linfo_string6-.debug_str.dwo
+.Lstr_offsets_end:
+
+ .section .debug_abbrev.dwo,"e",@progbits
+.Ldebug_cu_abbrev_begin:
+ .byte 3 # Abbreviation Code
+ .byte 17 # DW_TAG_compile_unit
+ .byte 1 # DW_CHILDREN_yes
+ .byte 37 # DW_AT_producer
+ .byte 37 # DW_FORM_strx1
+ .byte 19 # DW_AT_language
+ .byte 5 # DW_FORM_data2
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 118 # DW_AT_dwo_name
+ .byte 37 # DW_FORM_strx1
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 4 # Abbreviation Code
+ .byte 46 # DW_TAG_subprogram
+ .byte 1 # DW_CHILDREN_yes
+ .byte 17 # DW_AT_low_pc
+ .byte 27 # DW_FORM_addrx
+ .byte 18 # DW_AT_high_pc
+ .byte 6 # DW_FORM_data4
+ .byte 64 # DW_AT_frame_base
+ .byte 24 # DW_FORM_exprloc
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 73 # DW_AT_type
+ .byte 19 # DW_FORM_ref4
+ .byte 63 # DW_AT_external
+ .byte 25 # DW_FORM_flag_present
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 5 # Abbreviation Code
+ .byte 52 # DW_TAG_variable
+ .byte 0 # DW_CHILDREN_no
+ .byte 2 # DW_AT_location
+ .byte 24 # DW_FORM_exprloc
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 73 # DW_AT_type
+ .byte 19 # DW_FORM_ref4
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 6 # Abbreviation Code
+ .byte 36 # DW_TAG_base_type
+ .byte 0 # DW_CHILDREN_no
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 62 # DW_AT_encoding
+ .byte 11 # DW_FORM_data1
+ .byte 11 # DW_AT_byte_size
+ .byte 11 # DW_FORM_data1
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 7 # Abbreviation Code
+ .byte 19 # DW_TAG_structure_type
+ .byte 0 # DW_CHILDREN_no
+ .byte 60 # DW_AT_declaration
+ .byte 25 # DW_FORM_flag_present
+ .byte 105 # DW_AT_signature
+ .byte 32 # DW_FORM_ref_sig8
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 0 # EOM(3)
+.Ldebug_cu_abbrev_end:
+.Ldebug_tu_abbrev_begin:
+ .byte 1 # Abbreviation Code
+ .byte 65 # DW_TAG_type_unit
+ .byte 1 # DW_CHILDREN_yes
+ .byte 19 # DW_AT_language
+ .byte 5 # DW_FORM_data2
+ .byte 16 # DW_AT_stmt_list
+ .byte 23 # DW_FORM_sec_offset
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 2 # Abbreviation Code
+ .byte 19 # DW_TAG_structure_type
+ .byte 0 # DW_CHILDREN_no
+ .byte 54 # DW_AT_calling_convention
+ .byte 11 # DW_FORM_data1
+ .byte 3 # DW_AT_name
+ .byte 37 # DW_FORM_strx1
+ .byte 11 # DW_AT_byte_size
+ .byte 11 # DW_FORM_data1
+ .byte 58 # DW_AT_decl_file
+ .byte 11 # DW_FORM_data1
+ .byte 59 # DW_AT_decl_line
+ .byte 11 # DW_FORM_data1
+ .byte 0 # EOM(1)
+ .byte 0 # EOM(2)
+ .byte 0 # EOM(3)
+.Ldebug_tu_abbrev_end:
+.Ldebug_abbrev_dwo_end:
+
+.section .debug_tu_index,"",@progbits
+.short 5 # DWARF version number
+.short 0 # Reserved
+.long 3 # Section count
+.long 1 # Unit count
+.long 2 # Slot count
+
+.quad -4149699470930386446, 0 # Hash table
+.long 1, 0 # Index table
+
+## Table header
+.long 1 # DW_SECT_INFO
+.long 3 # DW_SECT_ABBREV
+.long 6 # DW_SECT_STR_OFFSETS
+
+## Offsets
+.long 0 # offset into .debug_info.dwo
+.long .Ldebug_tu_abbrev_begin - .debug_abbrev.dwo # offset into .debug_abbrev.dwo
+.long 0 # offset into .debug_str_offsets.dwo
+
+## Sizes
+.long .Ldebug_info_dwo_end0 - .debug_info.dwo
+.long .Ldebug_tu_abbrev_end - .Ldebug_tu_abbrev_begin
+.long .Lstr_offsets_end - .debug_str_offsets.dwo
+
+
+.section .debug_cu_index,"",@progbits
+.short 5 # DWARF version number
+.short 0 # Reserved
+.long 3 # Section count
+.long 1 # Unit count
+.long 2 # Slot count
+
+.quad -8218585293556409984, 0 # Hash table
+.long 1, 0 # Index table
+
+## Table header
+.long 1 # DW_SECT_INFO
+.long 3 # DW_SECT_ABBREV
+.long 6 # DW_SECT_STR_OFFSETS
+
+## Offsets
+.long .Ldebug_info_dwo_end0 - .debug_info.dwo # offset into .debug_info.dwo
+.long .Ldebug_cu_abbrev_begin - .debug_abbrev.dwo # offset into .debug_abbrev.dwo
+.long 0 # offset into .debug_str_offsets.dwo
+
+## Sizes
+.long .Ldebug_info_dwo_end1 - .Ldebug_info_dwo_end0
+.long .Ldebug_cu_abbrev_end - .Ldebug_cu_abbrev_begin
+.long .Lstr_offsets_end - .debug_str_offsets.dwo
+
+
+.endif
Index: lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.h
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.h
+++ lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.h
@@ -73,7 +73,8 @@
static llvm::Expected<DWARFUnitHeader>
extract(const lldb_private::DWARFDataExtractor &data, DIERef::Section section,
- lldb::offset_t *offset_ptr, const llvm::DWARFUnitIndex *index);
+ lldb_private::DWARFContext &dwarf_context,
+ lldb::offset_t *offset_ptr);
};
class DWARFUnit : public lldb_private::UserID {
@@ -84,8 +85,7 @@
static llvm::Expected<DWARFUnitSP>
extract(SymbolFileDWARF &dwarf2Data, lldb::user_id_t uid,
const lldb_private::DWARFDataExtractor &debug_info,
- DIERef::Section section, lldb::offset_t *offset_ptr,
- const llvm::DWARFUnitIndex *index);
+ DIERef::Section section, lldb::offset_t *offset_ptr);
virtual ~DWARFUnit();
bool IsDWOUnit() { return m_is_dwo; }
Index: lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
+++ lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
@@ -784,12 +784,11 @@
llvm::Expected<DWARFUnitHeader>
DWARFUnitHeader::extract(const DWARFDataExtractor &data,
- DIERef::Section section, lldb::offset_t *offset_ptr,
- const llvm::DWARFUnitIndex *index) {
+ DIERef::Section section,
+ lldb_private::DWARFContext &context,
+ lldb::offset_t *offset_ptr) {
DWARFUnitHeader header;
header.m_offset = *offset_ptr;
- if (index)
- header.m_index_entry = index->getFromOffset(*offset_ptr);
header.m_length = data.GetDWARFInitialLength(offset_ptr);
header.m_version = data.GetU16(offset_ptr);
if (header.m_version == 5) {
@@ -806,6 +805,16 @@
section == DIERef::Section::DebugTypes ? DW_UT_type : DW_UT_compile;
}
+ if (context.isDwo()) {
+ if (header.IsTypeUnit()) {
+ header.m_index_entry =
+ context.GetAsLLVM().getTUIndex().getFromOffset(header.m_offset);
+ } else {
+ header.m_index_entry =
+ context.GetAsLLVM().getCUIndex().getFromOffset(header.m_offset);
+ }
+ }
+
if (header.m_index_entry) {
if (header.m_abbr_offset) {
return llvm::createStringError(
@@ -856,12 +865,11 @@
llvm::Expected<DWARFUnitSP>
DWARFUnit::extract(SymbolFileDWARF &dwarf, user_id_t uid,
const DWARFDataExtractor &debug_info,
- DIERef::Section section, lldb::offset_t *offset_ptr,
- const llvm::DWARFUnitIndex *index) {
+ DIERef::Section section, lldb::offset_t *offset_ptr) {
assert(debug_info.ValidOffset(*offset_ptr));
- auto expected_header =
- DWARFUnitHeader::extract(debug_info, section, offset_ptr, index);
+ auto expected_header = DWARFUnitHeader::extract(
+ debug_info, section, dwarf.GetDWARFContext(), offset_ptr);
if (!expected_header)
return expected_header.takeError();
Index: lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
===================================================================
--- lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
+++ lldb/source/Plugins/SymbolFile/DWARF/DWARFDebugInfo.cpp
@@ -72,16 +72,10 @@
DWARFDataExtractor data = section == DIERef::Section::DebugTypes
? m_context.getOrLoadDebugTypesData()
: m_context.getOrLoadDebugInfoData();
- const llvm::DWARFUnitIndex *index = nullptr;
- if (m_context.isDwo())
- index = &llvm::getDWARFUnitIndex(m_context.GetAsLLVM(),
- section == DIERef::Section::DebugTypes
- ? llvm::DW_SECT_EXT_TYPES
- : llvm::DW_SECT_INFO);
lldb::offset_t offset = 0;
while (data.ValidOffset(offset)) {
llvm::Expected<DWARFUnitSP> unit_sp = DWARFUnit::extract(
- m_dwarf, m_units.size(), data, section, &offset, index);
+ m_dwarf, m_units.size(), data, section, &offset);
if (!unit_sp) {
// FIXME: Propagate this error up.
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