[llvm] d33b016 - [XCOFF][llvm-dwarfdump] llvm-dwarfdump support for XCOFF

Chen Zheng via llvm-commits llvm-commits at lists.llvm.org
Wed Mar 17 18:22:08 PDT 2021


Author: Chen Zheng
Date: 2021-03-17T21:21:51-04:00
New Revision: d33b016ada5634940cccf67e70f918dcd4dfb78e

URL: https://github.com/llvm/llvm-project/commit/d33b016ada5634940cccf67e70f918dcd4dfb78e
DIFF: https://github.com/llvm/llvm-project/commit/d33b016ada5634940cccf67e70f918dcd4dfb78e.diff

LOG: [XCOFF][llvm-dwarfdump] llvm-dwarfdump support for XCOFF

Author: hubert.reinterpretcast, shchenz

Reviewed By: jasonliu, echristo

Differential Revision: https://reviews.llvm.org/D97186

Added: 
    llvm/test/tools/llvm-dwarfdump/XCOFF/Inputs/basic32.o
    llvm/test/tools/llvm-dwarfdump/XCOFF/Inputs/basic64.o
    llvm/test/tools/llvm-dwarfdump/XCOFF/basic.test

Modified: 
    llvm/include/llvm/Object/Binary.h
    llvm/include/llvm/Object/XCOFFObjectFile.h
    llvm/lib/Object/XCOFFObjectFile.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/include/llvm/Object/Binary.h b/llvm/include/llvm/Object/Binary.h
index dd98e1143e25..a8f4437d5dbb 100644
--- a/llvm/include/llvm/Object/Binary.h
+++ b/llvm/include/llvm/Object/Binary.h
@@ -147,7 +147,8 @@ class Binary {
 
   bool isLittleEndian() const {
     return !(TypeID == ID_ELF32B || TypeID == ID_ELF64B ||
-             TypeID == ID_MachO32B || TypeID == ID_MachO64B);
+             TypeID == ID_MachO32B || TypeID == ID_MachO64B ||
+             TypeID == ID_XCOFF32 || TypeID == ID_XCOFF64);
   }
 
   bool isWinRes() const { return TypeID == ID_WinRes; }

diff  --git a/llvm/include/llvm/Object/XCOFFObjectFile.h b/llvm/include/llvm/Object/XCOFFObjectFile.h
index 1ac00ed5e2c7..dbc40c4ea880 100644
--- a/llvm/include/llvm/Object/XCOFFObjectFile.h
+++ b/llvm/include/llvm/Object/XCOFFObjectFile.h
@@ -317,6 +317,7 @@ class XCOFFObjectFile : public ObjectFile {
   Triple::ArchType getArch() const override;
   SubtargetFeatures getFeatures() const override;
   Expected<uint64_t> getStartAddress() const override;
+  StringRef mapDebugSectionName(StringRef Name) const override;
   bool isRelocatableObject() const override;
 
   // Below here is the non-inherited interface.

diff  --git a/llvm/lib/Object/XCOFFObjectFile.cpp b/llvm/lib/Object/XCOFFObjectFile.cpp
index a16a458168d4..74b10faad68f 100644
--- a/llvm/lib/Object/XCOFFObjectFile.cpp
+++ b/llvm/lib/Object/XCOFFObjectFile.cpp
@@ -11,6 +11,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Object/XCOFFObjectFile.h"
+#include "llvm/ADT/StringSwitch.h"
 #include "llvm/MC/SubtargetFeature.h"
 #include "llvm/Support/DataExtractor.h"
 #include <cstddef>
@@ -296,9 +297,7 @@ uint64_t XCOFFObjectFile::getSectionAlignment(DataRefImpl Sec) const {
 }
 
 bool XCOFFObjectFile::isSectionCompressed(DataRefImpl Sec) const {
-  bool Result = false;
-  llvm_unreachable("Not yet implemented!");
-  return Result;
+  return false;
 }
 
 bool XCOFFObjectFile::isSectionText(DataRefImpl Sec) const {
@@ -458,6 +457,22 @@ Expected<uint64_t> XCOFFObjectFile::getStartAddress() const {
   return 0;
 }
 
+StringRef XCOFFObjectFile::mapDebugSectionName(StringRef Name) const {
+  return StringSwitch<StringRef>(Name)
+      .Case("dwinfo", "debug_info")
+      .Case("dwline", "debug_line")
+      .Case("dwpbnms", "debug_pubnames")
+      .Case("dwpbtyp", "debug_pubtypes")
+      .Case("dwarnge", "debug_aranges")
+      .Case("dwabrev", "debug_abbrev")
+      .Case("dwstr", "debug_str")
+      .Case("dwrnges", "debug_ranges")
+      .Case("dwloc", "debug_loc")
+      .Case("dwframe", "debug_frame")
+      .Case("dwmac", "debug_macinfo")
+      .Default(Name);
+}
+
 size_t XCOFFObjectFile::getFileHeaderSize() const {
   return is64Bit() ? sizeof(XCOFFFileHeader64) : sizeof(XCOFFFileHeader32);
 }

diff  --git a/llvm/test/tools/llvm-dwarfdump/XCOFF/Inputs/basic32.o b/llvm/test/tools/llvm-dwarfdump/XCOFF/Inputs/basic32.o
new file mode 100644
index 000000000000..3ab6a54b803d
Binary files /dev/null and b/llvm/test/tools/llvm-dwarfdump/XCOFF/Inputs/basic32.o 
diff er

diff  --git a/llvm/test/tools/llvm-dwarfdump/XCOFF/Inputs/basic64.o b/llvm/test/tools/llvm-dwarfdump/XCOFF/Inputs/basic64.o
new file mode 100644
index 000000000000..a7d2625a99f2
Binary files /dev/null and b/llvm/test/tools/llvm-dwarfdump/XCOFF/Inputs/basic64.o 
diff er

diff  --git a/llvm/test/tools/llvm-dwarfdump/XCOFF/basic.test b/llvm/test/tools/llvm-dwarfdump/XCOFF/basic.test
new file mode 100644
index 000000000000..f1ff35a57df3
--- /dev/null
+++ b/llvm/test/tools/llvm-dwarfdump/XCOFF/basic.test
@@ -0,0 +1,274 @@
+# RUN: llvm-dwarfdump --all %p/Inputs/basic32.o | FileCheck %s --check-prefix=DWARF32 
+# RUN: llvm-dwarfdump --all %p/Inputs/basic64.o | FileCheck %s --check-prefix=DWARF64
+
+## basic32.o Compiled with IBM XL C/C++ for AIX, V16.1.1.0
+## Compiler command: xlc basic.c -c -qdbgfmt=dwarf -g -q32 -o basic32.o
+##
+## basic64.o Compiled with IBM XL C/C++ for AIX, V16.1.1.0
+## Compiler command: xlc basic.c -c -qdbgfmt=dwarf -g -q64 -o basic64.o
+##
+## basic.c:
+## int main(void)
+## {
+##   return 0;
+## }
+
+# DWARF32:      .debug_abbrev contents:
+# DWARF32-NEXT:  Abbrev table for offset: 0x00000000
+# DWARF32-NEXT:  [1] DW_TAG_compile_unit DW_CHILDREN_yes
+# DWARF32-NEXT:          DW_AT_name      DW_FORM_string
+# DWARF32-NEXT:          DW_AT_stmt_list DW_FORM_data4
+# DWARF32-NEXT:          DW_AT_low_pc    DW_FORM_addr
+# DWARF32-NEXT:          DW_AT_high_pc   DW_FORM_addr
+# DWARF32-NEXT:          DW_AT_language  DW_FORM_data1
+# DWARF32-NEXT:          DW_AT_comp_dir  DW_FORM_string
+# DWARF32-NEXT:          DW_AT_producer  DW_FORM_string
+# DWARF32:       [2] DW_TAG_base_type    DW_CHILDREN_no
+# DWARF32-NEXT:          DW_AT_name      DW_FORM_string
+# DWARF32-NEXT:          DW_AT_byte_size DW_FORM_data1
+# DWARF32-NEXT:          DW_AT_encoding  DW_FORM_data1
+# DWARF32:       [3] DW_TAG_const_type   DW_CHILDREN_no
+# DWARF32-NEXT:          DW_AT_type      DW_FORM_ref4
+# DWARF32:       [4] DW_TAG_array_type   DW_CHILDREN_yes
+# DWARF32-NEXT:          DW_AT_sibling   DW_FORM_ref4
+# DWARF32-NEXT:          DW_AT_type      DW_FORM_ref4
+# DWARF32:       [5] DW_TAG_subrange_type        DW_CHILDREN_no
+# DWARF32-NEXT:          DW_AT_lower_bound       DW_FORM_data1
+# DWARF32-NEXT:          DW_AT_upper_bound       DW_FORM_data1
+# DWARF32:       [6] DW_TAG_subprogram   DW_CHILDREN_yes
+# DWARF32-NEXT:          DW_AT_name      DW_FORM_string
+# DWARF32-NEXT:          DW_AT_low_pc    DW_FORM_addr
+# DWARF32-NEXT:          DW_AT_high_pc   DW_FORM_addr
+# DWARF32-NEXT:          DW_AT_prototyped        DW_FORM_flag
+# DWARF32-NEXT:          DW_AT_calling_convention        DW_FORM_data1
+# DWARF32-NEXT:          DW_AT_decl_file DW_FORM_data1
+# DWARF32-NEXT:          DW_AT_decl_line DW_FORM_data1
+# DWARF32-NEXT:          DW_AT_external  DW_FORM_flag
+# DWARF32-NEXT:          DW_AT_frame_base        DW_FORM_block1
+# DWARF32-NEXT:          DW_AT_type      DW_FORM_ref4
+# DWARF32:       [7] DW_TAG_variable     DW_CHILDREN_no
+# DWARF32-NEXT:          DW_AT_location  DW_FORM_block1
+# DWARF32-NEXT:          DW_AT_name      DW_FORM_string
+# DWARF32-NEXT:          DW_AT_decl_file DW_FORM_data1
+# DWARF32-NEXT:          DW_AT_decl_line DW_FORM_data1
+# DWARF32-NEXT:          DW_AT_type      DW_FORM_ref4
+# DWARF32:       .debug_info contents:
+# DWARF32-NEXT:  0x00000000: Compile Unit: length = 0x00000094, format = DWARF32, version = 0x0003, abbr_offset = 0x0000, addr_size = 0x04 (next unit at 0x00000098)
+# DWARF32:       0x0000000b: DW_TAG_compile_unit
+# DWARF32:                DW_AT_name        ("basic.c")
+# DWARF32-NEXT:                DW_AT_stmt_list   (0x00000000)
+# DWARF32-NEXT:                DW_AT_low_pc      (0x00000000)
+# DWARF32-NEXT:                DW_AT_high_pc     (0x00000080)
+# DWARF32-NEXT:                DW_AT_language    (DW_LANG_C89)
+# DWARF32-NEXT:                DW_AT_comp_dir    ("/")
+# DWARF32-NEXT:                DW_AT_producer    ("IBM XL C for AIX, Version 16.1.1.0")
+# DWARF32:       0x00000046:   DW_TAG_base_type
+# DWARF32-NEXT:                  DW_AT_name      ("char")
+# DWARF32-NEXT:                  DW_AT_byte_size (0x01)
+# DWARF32-NEXT:                  DW_AT_encoding  (DW_ATE_unsigned_char)
+# DWARF32:       0x0000004e:   DW_TAG_base_type
+# DWARF32-NEXT:                  DW_AT_name      ("int")
+# DWARF32-NEXT:                  DW_AT_byte_size (0x04)
+# DWARF32-NEXT:                  DW_AT_encoding  (DW_ATE_signed)
+# DWARF32:       0x00000055:   DW_TAG_const_type
+# DWARF32-NEXT:                  DW_AT_type      (0x00000046 "char")
+# DWARF32:       0x0000005a:   DW_TAG_array_type
+# DWARF32-NEXT:                  DW_AT_sibling   (0x00000067)
+# DWARF32-NEXT:                  DW_AT_type      (0x00000055 "const char")
+# DWARF32:       0x00000063:     DW_TAG_subrange_type
+# DWARF32-NEXT:                    DW_AT_lower_bound     (0x00)
+# DWARF32-NEXT:                    DW_AT_upper_bound     (0x04)
+# DWARF32:       0x00000066:     NULL
+# DWARF32:       0x00000067:   DW_TAG_subprogram
+# DWARF32-NEXT:                  DW_AT_name      ("main")
+# DWARF32-NEXT:                  DW_AT_low_pc    (0x00000000)
+# DWARF32-NEXT:                  DW_AT_high_pc   (0x00000024)
+# DWARF32-NEXT:                  DW_AT_prototyped        (0x01)
+# DWARF32-NEXT:                  DW_AT_calling_convention        (DW_CC_program)
+# DWARF32-NEXT:                  DW_AT_decl_file ("/basic.c")
+# DWARF32-NEXT:                  DW_AT_decl_line (1)
+# DWARF32-NEXT:                  DW_AT_external  (0x01)
+# DWARF32-NEXT:                  DW_AT_frame_base        (DW_OP_reg1 R1)
+# DWARF32-NEXT:                  DW_AT_type      (0x0000004e "int")
+# DWARF32:       0x00000080:     DW_TAG_variable
+# DWARF32-NEXT:                    DW_AT_location        (DW_OP_addr 0x0)
+# DWARF32-NEXT:                    DW_AT_name    ("__func__")
+# DWARF32-NEXT:                    DW_AT_decl_file       ("/basic.c")
+# DWARF32-NEXT:                    DW_AT_decl_line       (0)
+# DWARF32-NEXT:                    DW_AT_type    (0x0000005a "const char[5]")
+# DWARF32:       0x00000096:     NULL
+# DWARF32:       0x00000097:   NULL
+# DWARF32:       .debug_line contents:
+# DWARF32-NEXT:  debug_line[0x00000000]
+# DWARF32-NEXT:  Line table prologue:
+# DWARF32-NEXT:      total_length: 0x00000042
+# DWARF32-NEXT:            format: DWARF32
+# DWARF32-NEXT:           version: 3
+# DWARF32-NEXT:   prologue_length: 0x0000001e
+# DWARF32-NEXT:   min_inst_length: 1
+# DWARF32-NEXT:   default_is_stmt: 1
+# DWARF32-NEXT:         line_base: -100
+# DWARF32-NEXT:        line_range: 220
+# DWARF32-NEXT:       opcode_base: 13
+# DWARF32-NEXT:  standard_opcode_lengths[DW_LNS_copy] = 0
+# DWARF32-NEXT:  standard_opcode_lengths[DW_LNS_advance_pc] = 1
+# DWARF32-NEXT:  standard_opcode_lengths[DW_LNS_advance_line] = 1
+# DWARF32-NEXT:  standard_opcode_lengths[DW_LNS_set_file] = 1
+# DWARF32-NEXT:  standard_opcode_lengths[DW_LNS_set_column] = 1
+# DWARF32-NEXT:  standard_opcode_lengths[DW_LNS_negate_stmt] = 0
+# DWARF32-NEXT:  standard_opcode_lengths[DW_LNS_set_basic_block] = 0
+# DWARF32-NEXT:  standard_opcode_lengths[DW_LNS_const_add_pc] = 0
+# DWARF32-NEXT:  standard_opcode_lengths[DW_LNS_fixed_advance_pc] = 1
+# DWARF32-NEXT:  standard_opcode_lengths[DW_LNS_set_prologue_end] = 0
+# DWARF32-NEXT:  standard_opcode_lengths[DW_LNS_set_epilogue_begin] = 0
+# DWARF32-NEXT:  standard_opcode_lengths[DW_LNS_set_isa] = 1
+# DWARF32-NEXT:  file_names[  1]:
+# DWARF32-NEXT:             name: "basic.c"
+# DWARF32-NEXT:        dir_index: 0
+# DWARF32-NEXT:         mod_time: 0x00000000
+# DWARF32-NEXT:           length: 0x00000000
+# DWARF32:       Address            Line   Column File   ISA Discriminator Flags
+# DWARF32-NEXT:  ------------------ ------ ------ ------ --- ------------- -------------
+# DWARF32-NEXT:  0x0000000000000000      1      0      1   0             0  is_stmt
+# DWARF32-NEXT:  0x0000000000000004      3      0      1   0             0  is_stmt
+# DWARF32-NEXT:  0x0000000000000008      4      0      1   0             0  is_stmt
+# DWARF32-NEXT:  0x0000000000000080      4      0      1   0             0  is_stmt end_sequence
+# DWARF32:      .debug_pubnames contents:
+# DWARF32-NEXT:  length = 0x00000017, format = DWARF32, version = 0x0002, unit_offset = 0x00000000, unit_size = 0x00000098
+# DWARF32-NEXT:  Offset     Name
+# DWARF32-NEXT:  0x00000067 "main"
+# DWARF32:       .debug_pubtypes contents:
+# DWARF32-NEXT:  length = 0x0000001f, format = DWARF32, version = 0x0002, unit_offset = 0x00000000, unit_size = 0x00000098
+# DWARF32-NEXT:  Offset     Name
+# DWARF32-NEXT:  0x0000004e "int"
+# DWARF32-NEXT:  0x00000046 "char"
+
+# DWARF64:       .debug_abbrev contents:
+# DWARF64-NEXT:  Abbrev table for offset: 0x00000000
+# DWARF64-NEXT:  [1] DW_TAG_compile_unit DW_CHILDREN_yes
+# DWARF64-NEXT:          DW_AT_name      DW_FORM_string
+# DWARF64-NEXT:          DW_AT_stmt_list DW_FORM_data8
+# DWARF64-NEXT:          DW_AT_low_pc    DW_FORM_addr
+# DWARF64-NEXT:          DW_AT_high_pc   DW_FORM_addr
+# DWARF64-NEXT:          DW_AT_language  DW_FORM_data1
+# DWARF64-NEXT:          DW_AT_comp_dir  DW_FORM_string
+# DWARF64-NEXT:          DW_AT_producer  DW_FORM_string
+# DWARF64:       [2] DW_TAG_base_type    DW_CHILDREN_no
+# DWARF64-NEXT:          DW_AT_name      DW_FORM_string
+# DWARF64-NEXT:          DW_AT_byte_size DW_FORM_data1
+# DWARF64-NEXT:          DW_AT_encoding  DW_FORM_data1
+# DWARF64:       [3] DW_TAG_const_type   DW_CHILDREN_no
+# DWARF64-NEXT:          DW_AT_type      DW_FORM_ref8
+# DWARF64:       [4] DW_TAG_array_type   DW_CHILDREN_yes
+# DWARF64-NEXT:          DW_AT_sibling   DW_FORM_ref8
+# DWARF64-NEXT:          DW_AT_type      DW_FORM_ref8
+# DWARF64:       [5] DW_TAG_subrange_type        DW_CHILDREN_no
+# DWARF64-NEXT:          DW_AT_lower_bound       DW_FORM_data1
+# DWARF64-NEXT:          DW_AT_upper_bound       DW_FORM_data1
+# DWARF64:       [6] DW_TAG_subprogram   DW_CHILDREN_yes
+# DWARF64-NEXT:          DW_AT_name      DW_FORM_string
+# DWARF64-NEXT:          DW_AT_low_pc    DW_FORM_addr
+# DWARF64-NEXT:          DW_AT_high_pc   DW_FORM_addr
+# DWARF64-NEXT:          DW_AT_prototyped        DW_FORM_flag
+# DWARF64-NEXT:          DW_AT_calling_convention        DW_FORM_data1
+# DWARF64-NEXT:          DW_AT_decl_file DW_FORM_data1
+# DWARF64-NEXT:          DW_AT_decl_line DW_FORM_data1
+# DWARF64-NEXT:          DW_AT_external  DW_FORM_flag
+# DWARF64-NEXT:          DW_AT_frame_base        DW_FORM_block1
+# DWARF64-NEXT:          DW_AT_type      DW_FORM_ref8
+# DWARF64:       [7] DW_TAG_variable     DW_CHILDREN_no
+# DWARF64-NEXT:          DW_AT_location  DW_FORM_block1
+# DWARF64-NEXT:          DW_AT_name      DW_FORM_string
+# DWARF64-NEXT:          DW_AT_decl_file DW_FORM_data1
+# DWARF64-NEXT:          DW_AT_decl_line DW_FORM_data1
+# DWARF64-NEXT:          DW_AT_type      DW_FORM_ref8
+# DWARF64:       .debug_info contents:
+# DWARF64-NEXT:  0x00000000: Compile Unit: length = 0x00000000000000c4, format = DWARF64, version = 0x0003, abbr_offset = 0x0000, addr_size = 0x08 (next unit at 0x000000d0)
+# DWARF64:       0x00000017: DW_TAG_compile_unit
+# DWARF64-NEXT:                DW_AT_name        ("basic.c")
+# DWARF64-NEXT:                DW_AT_stmt_list   (0x0000000000000000)
+# DWARF64-NEXT:                DW_AT_low_pc      (0x0000000000000000)
+# DWARF64-NEXT:                DW_AT_high_pc     (0x0000000000000080)
+# DWARF64-NEXT:                DW_AT_language    (DW_LANG_C89)
+# DWARF64-NEXT:                DW_AT_comp_dir    ("/")
+# DWARF64-NEXT:                DW_AT_producer    ("IBM XL C for AIX, Version 16.1.1.0")
+# DWARF64:       0x0000005e:   DW_TAG_base_type
+# DWARF64-NEXT:                  DW_AT_name      ("char")
+# DWARF64-NEXT:                  DW_AT_byte_size (0x01)
+# DWARF64-NEXT:                  DW_AT_encoding  (DW_ATE_unsigned_char)
+# DWARF64:       0x00000066:   DW_TAG_base_type
+# DWARF64-NEXT:                  DW_AT_name      ("int")
+# DWARF64-NEXT:                  DW_AT_byte_size (0x04)
+# DWARF64-NEXT:                  DW_AT_encoding  (DW_ATE_signed)
+# DWARF64:       0x0000006d:   DW_TAG_const_type
+# DWARF64-NEXT:                  DW_AT_type      (0x0000005e "char")
+# DWARF64:       0x00000076:   DW_TAG_array_type
+# DWARF64-NEXT:                  DW_AT_sibling   (0x0000008b)
+# DWARF64-NEXT:                  DW_AT_type      (0x0000006d "const char")
+# DWARF64:       0x00000087:     DW_TAG_subrange_type
+# DWARF64-NEXT:                    DW_AT_lower_bound     (0x00)
+# DWARF64-NEXT:                    DW_AT_upper_bound     (0x04)
+# DWARF64:       0x0000008a:     NULL
+# DWARF64:       0x0000008b:   DW_TAG_subprogram
+# DWARF64-NEXT:                  DW_AT_name      ("main")
+# DWARF64-NEXT:                  DW_AT_low_pc    (0x0000000000000000)
+# DWARF64-NEXT:                  DW_AT_high_pc   (0x0000000000000024)
+# DWARF64-NEXT:                  DW_AT_prototyped        (0x01)
+# DWARF64-NEXT:                  DW_AT_calling_convention        (DW_CC_program)
+# DWARF64-NEXT:                  DW_AT_decl_file ("/basic.c")
+# DWARF64-NEXT:                  DW_AT_decl_line (1)
+# DWARF64-NEXT:                  DW_AT_external  (0x01)
+# DWARF64-NEXT:                  DW_AT_frame_base        (DW_OP_reg1 X1)
+# DWARF64-NEXT:                  DW_AT_type      (0x00000066 "int")
+# DWARF64:       0x000000b0:     DW_TAG_variable
+# DWARF64-NEXT:                    DW_AT_location        (DW_OP_addr 0x0)
+# DWARF64-NEXT:                    DW_AT_name    ("__func__")
+# DWARF64-NEXT:                    DW_AT_decl_file       ("/basic.c")
+# DWARF64-NEXT:                    DW_AT_decl_line       (0)
+# DWARF64-NEXT:                    DW_AT_type    (0x00000076 "const char[5]")
+# DWARF64:       0x000000ce:     NULL
+# DWARF64:       0x000000cf:   NULL
+# DWARF64:       .debug_line contents:
+# DWARF64-NEXT:  debug_line[0x00000000]
+# DWARF64-NEXT:  Line table prologue:
+# DWARF64-NEXT:      total_length: 0x000000000000004a
+# DWARF64-NEXT:            format: DWARF64
+# DWARF64-NEXT:           version: 3
+# DWARF64-NEXT:   prologue_length: 0x000000000000001e
+# DWARF64-NEXT:   min_inst_length: 1
+# DWARF64-NEXT:   default_is_stmt: 1
+# DWARF64-NEXT:         line_base: -100
+# DWARF64-NEXT:        line_range: 220
+# DWARF64-NEXT:       opcode_base: 13
+# DWARF64-NEXT:  standard_opcode_lengths[DW_LNS_copy] = 0
+# DWARF64-NEXT:  standard_opcode_lengths[DW_LNS_advance_pc] = 1
+# DWARF64-NEXT:  standard_opcode_lengths[DW_LNS_advance_line] = 1
+# DWARF64-NEXT:  standard_opcode_lengths[DW_LNS_set_file] = 1
+# DWARF64-NEXT:  standard_opcode_lengths[DW_LNS_set_column] = 1
+# DWARF64-NEXT:  standard_opcode_lengths[DW_LNS_negate_stmt] = 0
+# DWARF64-NEXT:  standard_opcode_lengths[DW_LNS_set_basic_block] = 0
+# DWARF64-NEXT:  standard_opcode_lengths[DW_LNS_const_add_pc] = 0
+# DWARF64-NEXT:  standard_opcode_lengths[DW_LNS_fixed_advance_pc] = 1
+# DWARF64-NEXT:  standard_opcode_lengths[DW_LNS_set_prologue_end] = 0
+# DWARF64-NEXT:  standard_opcode_lengths[DW_LNS_set_epilogue_begin] = 0
+# DWARF64-NEXT:  standard_opcode_lengths[DW_LNS_set_isa] = 1
+# DWARF64-NEXT:  file_names[  1]:
+# DWARF64-NEXT:             name: "basic.c"
+# DWARF64-NEXT:        dir_index: 0
+# DWARF64-NEXT:         mod_time: 0x00000000
+# DWARF64-NEXT:           length: 0x00000000
+# DWARF64:       Address            Line   Column File   ISA Discriminator Flags
+# DWARF64-NEXT:  ------------------ ------ ------ ------ --- ------------- -------------
+# DWARF64-NEXT:  0x0000000000000000      1      0      1   0             0  is_stmt
+# DWARF64-NEXT:  0x0000000000000004      3      0      1   0             0  is_stmt
+# DWARF64-NEXT:  0x0000000000000008      4      0      1   0             0  is_stmt
+# DWARF64-NEXT:  0x0000000000000080      4      0      1   0             0  is_stmt end_sequence
+# DWARF64:       .debug_pubnames contents:
+# DWARF64-NEXT:  length = 0x0000000000000027, format = DWARF64, version = 0x0002, unit_offset = 0x0000000000000000, unit_size = 0x00000000000000d0
+# DWARF64-NEXT:  Offset     Name
+# DWARF64-NEXT:  0x000000000000008b "main"
+# DWARF64:       .debug_pubtypes contents:
+# DWARF64-NEXT:  length = 0x0000000000000033, format = DWARF64, version = 0x0002, unit_offset = 0x0000000000000000, unit_size = 0x00000000000000d0
+# DWARF64-NEXT:  Offset     Name
+# DWARF64-NEXT:  0x0000000000000066 "int"
+# DWARF64-NEXT:  0x000000000000005e "char"


        


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