http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56805
Bug #: 56805
Summary: DW_AT_typedef missing when -fdebug-types-section is
used (and -fno-eliminate-unused-debug-types)
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: jan.sm...@alcatel-lucent.com
typedef struct
{
char b[4];
} some_typedef_name;
typedef some_typedef_name joske;
int main()
{
return 0;
}
Compiled with :
-gdwarf-4 -fno-var-tracking-assignments -fno-eliminate-unused-debug-types
-fdebug-types-section
Contents of the .debug_types section:
Compilation Unit @ offset 0x0:
Length: 0x4f (32-bit)
Version: 4
Abbrev Offset: 0
Pointer Size: 4
Signature: 86cb53f6d82bc2c9
Type Offset: 0x1d
<0><17>: Abbrev Number: 1 (DW_TAG_type_unit)
<18> DW_AT_language : 4 (C++)
<19> DW_AT_stmt_list : 0x0
<1><1d>: Abbrev Number: 2 (DW_TAG_structure_type)
<1e> DW_AT_byte_size : 4
<1f> DW_AT_decl_file : 1
<20> DW_AT_decl_line : 2
<21> DW_AT_linkage_name: (indirect string, offset: 0x0):
17some_typedef_name
<25> DW_AT_sibling : <0x34>
<2><29>: Abbrev Number: 3 (DW_TAG_member)
<2a> DW_AT_name : b
<2c> DW_AT_decl_file : 1
<2d> DW_AT_decl_line : 3
<2e> DW_AT_type : <0x34>
<32> DW_AT_data_member_location: 0
<1><34>: Abbrev Number: 4 (DW_TAG_array_type)
<35> DW_AT_type : <0x44>
<39> DW_AT_sibling : <0x44>
<2><3d>: Abbrev Number: 5 (DW_TAG_subrange_type)
<3e> DW_AT_type : <0x4b>
<42> DW_AT_upper_bound : 3
<1><44>: Abbrev Number: 6 (DW_TAG_base_type)
<45> DW_AT_byte_size : 1
<46> DW_AT_encoding : 6 (signed char)
<47> DW_AT_name : (indirect string, offset: 0x14): char
<1><4b>: Abbrev Number: 6 (DW_TAG_base_type)
<4c> DW_AT_byte_size : 4
<4d> DW_AT_encoding : 7 (unsigned)
<4e> DW_AT_name : (indirect string, offset: 0x19): sizetype
Contents of the .debug_info section:
Compilation Unit @ offset 0x0:
Length: 0x48 (32-bit)
Version: 4
Abbrev Offset: 0
Pointer Size: 4
<0><b>: Abbrev Number: 7 (DW_TAG_compile_unit)
<c> DW_AT_producer : (indirect string, offset: 0x27): GNU C++ 4.8.0
<10> DW_AT_language : 4 (C++)
<11> DW_AT_name : (indirect string, offset: 0x103): /tmp/dwarf.c
<15> DW_AT_low_pc : 0x0
<19> DW_AT_high_pc : 0x24
<1d> DW_AT_stmt_list : 0x0
<1><21>: Abbrev Number: 6 (DW_TAG_base_type)
<22> DW_AT_byte_size : 4
<23> DW_AT_encoding : 7 (unsigned)
<24> DW_AT_name : (indirect string, offset: 0x19): sizetype
<1><28>: Abbrev Number: 6 (DW_TAG_base_type)
<29> DW_AT_byte_size : 1
<2a> DW_AT_encoding : 6 (signed char)
<2b> DW_AT_name : (indirect string, offset: 0x14): char
<1><2f>: Abbrev Number: 8 (DW_TAG_subprogram)
<30> DW_AT_external : 1
<30> DW_AT_name : (indirect string, offset: 0x22): main
<34> DW_AT_decl_file : 1
<35> DW_AT_decl_line : 7
<36> DW_AT_type : <0x44>
<3a> DW_AT_low_pc : 0x0
<3e> DW_AT_high_pc : 0x24
<42> DW_AT_frame_base : 1 byte block: 9c (DW_OP_call_frame_cfa)
<44> DW_AT_GNU_all_call_sites: 1
<1><44>: Abbrev Number: 9 (DW_TAG_base_type)
<45> DW_AT_byte_size : 4
<46> DW_AT_encoding : 5 (signed)
<47> DW_AT_name : int
without -fdebug-types-section (note the DW_AT_typedef for 'some_typedef_name'
and 'joske')
Contents of the .debug_info section:
Compilation Unit @ offset 0x0:
Length: 0x85 (32-bit)
Version: 4
Abbrev Offset: 0
Pointer Size: 4
<0><b>: Abbrev Number: 1 (DW_TAG_compile_unit)
<c> DW_AT_producer : (indirect string, offset: 0x2c): GNU C++ 4.8.0
<10> DW_AT_language : 4 (C++)
<11> DW_AT_name : (indirect string, offset: 0x105): /tmp/dwarf.c
<15> DW_AT_low_pc : 0x0
<19> DW_AT_high_pc : 0x24
<1d> DW_AT_stmt_list : 0x0
<1><21>: Abbrev Number: 2 (DW_TAG_structure_type)
<22> DW_AT_byte_size : 4
<23> DW_AT_decl_file : 1
<24> DW_AT_decl_line : 2
<25> DW_AT_linkage_name: (indirect string, offset: 0x18):
17some_typedef_name
<29> DW_AT_sibling : <0x38>
<2><2d>: Abbrev Number: 3 (DW_TAG_member)
<2e> DW_AT_name : b
<30> DW_AT_decl_file : 1
<31> DW_AT_decl_line : 3
<32> DW_AT_type : <0x38>
<36> DW_AT_data_member_location: 0
<1><38>: Abbrev Number: 4 (DW_TAG_array_type)
<39> DW_AT_type : <0x4f>
<3d> DW_AT_sibling : <0x48>
<2><41>: Abbrev Number: 5 (DW_TAG_subrange_type)
<42> DW_AT_type : <0x48>
<46> DW_AT_upper_bound : 3
<1><48>: Abbrev Number: 6 (DW_TAG_base_type)
<49> DW_AT_byte_size : 4
<4a> DW_AT_encoding : 7 (unsigned)
<4b> DW_AT_name : (indirect string, offset: 0xf2): sizetype
<1><4f>: Abbrev Number: 6 (DW_TAG_base_type)
<50> DW_AT_byte_size : 1
<51> DW_AT_encoding : 6 (signed char)
<52> DW_AT_name : (indirect string, offset: 0x100): char
<1><56>: Abbrev Number: 7 (DW_TAG_typedef)
<57> DW_AT_name : (indirect string, offset: 0x0):
some_typedef_name
<5b> DW_AT_decl_file : 1
<5c> DW_AT_decl_line : 4
<5d> DW_AT_type : <0x21>
<1><61>: Abbrev Number: 7 (DW_TAG_typedef)
<62> DW_AT_name : (indirect string, offset: 0x12): joske
<66> DW_AT_decl_file : 1
<67> DW_AT_decl_line : 6
<68> DW_AT_type : <0x56>
<1><6c>: Abbrev Number: 8 (DW_TAG_subprogram)
<6d> DW_AT_external : 1
<6d> DW_AT_name : (indirect string, offset: 0xfb): main
<71> DW_AT_decl_file : 1
<72> DW_AT_decl_line : 7
<73> DW_AT_type : <0x81>
<77> DW_AT_low_pc : 0x0
<7b> DW_AT_high_pc : 0x24
<7f> DW_AT_frame_base : 1 byte block: 9c (DW_OP_call_frame_cfa)
<81> DW_AT_GNU_all_call_sites: 1
<1><81>: Abbrev Number: 9 (DW_TAG_base_type)
<82> DW_AT_byte_size : 4
<83> DW_AT_encoding : 5 (signed)
<84> DW_AT_name : int
