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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2014231
Title:
gcc produces DWARF5, gdb requires DWARF4
Status in linux package in Ubuntu:
Incomplete
Bug description:
On Ubuntu 22.04.2 LTS using fully updated gcc and gdb, I find that by
default gcc produces DWARF5 debug files which gdb cannot read, with
the following error:
Dwarf Error: DW_FORM_line_strp used without required section
If I add the flags `-gdwarf-4 -gstrict-dwarf` to `gcc` then it
produces output which gdb can read.
I would have expected the created and required versions of DWARF to
match between these two programs.
(I found the following two issues which appear to be people also
suffering from gcc newly producing DWARF5, in different contexts:
https://github.com/golang/vscode-go/issues/1914
https://github.com/haikuports/haikuports/issues/4987 ; as mentioned
however, the mismatch between what gcc produces and what gdb accepts
seems to be a specific problem, which I suppose may be likely to break
e.g. existing working debug instructions, etc.)
---
Package: gcc
Version: 4:11.2.0-1ubuntu1
$ gcc --version
gcc (Ubuntu 11.3.0-1ubuntu1~22.04) 11.3.0
Package: gdb
Version: 12.1-0ubuntu1~22.04
$ gdb --version
GNU gdb (Ubuntu 12.1-0ubuntu1~22.04) 12.1
Using default gcc output (i.e. with no flags specifying DWARF version):
(gdb) add-symbol-file {...}/shimx64.efi.debug 0x0561B000 -s .data 0x05681000
add symbol table from file "{...}/shimx64.efi.debug" at
.text_addr = 0x561b000
.data_addr = 0x5681000
(y or n) y
Reading symbols from {...}/shimx64.efi.debug...
Dwarf Error: DW_FORM_line_strp used without required section
(No debugging symbols found in {...}/shimx64.efi.debug)
(gdb)
After adding `-gdwarf-4 -gstrict-dwarf` to gcc compile flags:
(gdb) add-symbol-file {...}/shimx64.efi.debug 0x0561B000 -s .data 0x05681000
add symbol table from file "{...}/shimx64.efi.debug" at
.text_addr = 0x561b000
.data_addr = 0x5681000
(y or n) y
Reading symbols from {...}/shimx64.efi.debug...
(gdb)
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