https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105454
Bug ID: 105454
Summary: DWARF has wrong decl_line for type defined inside
program
Product: gcc
Version: 9.4.1
Status: UNCONFIRMED
Keywords: wrong-debug
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: nils-christian.kempke at intel dot com
Target Milestone: ---
This was tested with
-------------------------------------------------------------------
>> gfortran --version
GNU Fortran (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0
-------------------------------------------------------------------
Compiling the following code
-------------------------------------------------------------------
>> cat test.f90
program MAIN
type :: localtype
integer :: a
end type localtype
type(localtype) :: var
var%a = 1
print *, var
end program
-------------------------------------------------------------------
via
-------------------------------------------------------------------
>> gfortran -O0 -g ./test.f90
-------------------------------------------------------------------
and looking at its DWARF output via objdump shows
-------------------------------------------------------------------
...
<1><2e>: Abbrev Number: 2 (DW_TAG_structure_type)
<2f> DW_AT_name : (indirect string, offset: 0x10): localtype
<33> DW_AT_byte_size : 4
<34> DW_AT_decl_file : 1
<35> DW_AT_decl_line : 1
<36> DW_AT_sibling : <0x45>
<2><3a>: Abbrev Number: 3 (DW_TAG_member)
<3b> DW_AT_name : a
<3d> DW_AT_decl_file : 1
<3e> DW_AT_decl_line : 4
<3f> DW_AT_type : <0x45>
<43> DW_AT_data_member_location: 0
<2><44>: Abbrev Number: 0
...
-------------------------------------------------------------------
Note, that localtype has a DW_AT_decl_line 1 while in the actual source file it
is line 3. Its member a however has correct source code correlation as it is,
in fact, introduced on line 4.
Correctly, gfortran should place the localtype on line 3, the first line for
the declared type.
