Public bug reported: 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) ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2014231 Title: gcc produces DWARF5, gdb requires DWARF4 Status in linux package in Ubuntu: New 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2014231/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
