[Bug tapsets/26843] print_ubacktrace_fileline is broken on master

["wcohen at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=26843

William Cohen <wcohen at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |wcohen at redhat dot com
   Last reconfirmed|                            |2024-01-11
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #1 from William Cohen <wcohen at redhat dot com> ---
When trying this on x86_64 RHEL8, RHEL9, and Fedora 39 with a current git
checkout of systemtap (023ec371b183c1) the output included the file and line
number:

$ sudo ../install/bin/stap a.stp -c
/home/wcohen/systemtap_write/systemtap/a.out
 0x40110a : main+0x4/0xe at /home/wcohen/systemtap_write/systemtap/a.c:2
[/home/wcohen/systemtap_write/systemtap/a.out]
 0x7f26492ee14a [/usr/lib64/libc.so.6+0x2814a/0x1e2000]
WARNING: Missing unwind data for a module, rerun with 'stap -d
/usr/lib64/libc.so.6'

However, on x86_64 unbuntu 20.04 I do see the issue reported with the same git
checkout of systemtap:

$ sudo ../install/bin/stap a.stp  -c
/home/william/systemtap_write/systemtap/a.out
 0x55facda6a131 : main+0x8/0x17 [/home/william/systemtap_write/systemtap/a.out]
 0x7f3804b72083 [/usr/lib/x86_64-linux-gnu/libc-2.31.so+0x24083/0x1f2000]
WARNING: Missing unwind data for a module, rerun with 'stap -d
/usr/lib/x86_64-linux-gnu/libc-2.31.so'

On RHEL8 dwarf4 is being used and on RHEL9/Fedora 39 dwarf 5.  Ubuntu 20.04 is
using dwarf 4.  I was able to run the unbuntu generated a.out on f39.  The
output is missing the expected filename and line number. Using "llvm-objdump
--line-numbers <object_file>" on f39 it appears that llvm-objdump can find the
line numbers:

f39 generated binary:

0000000000401106 <main>:
; main():
; /home/wcohen/systemtap_write/systemtap/a.c:1
  401106: 55                            pushq   %rbp
  401107: 48 89 e5                      movq    %rsp, %rbp
; /home/wcohen/systemtap_write/systemtap/a.c:2
  40110a: b8 00 00 00 00                movl    $0x0, %eax
; /home/wcohen/systemtap_write/systemtap/a.c:3
  40110f: 5d                            popq    %rbp
  401110: c3                            retq



ubuntu 20.04 generated binary:

0000000000001129 <main>:
; main():
; /home/william/systemtap_write/systemtap/a.c:1
    1129: f3 0f 1e fa                   endbr64
    112d: 55                            pushq   %rbp
    112e: 48 89 e5                      movq    %rsp, %rbp
; /home/william/systemtap_write/systemtap/a.c:2
    1131: b8 00 00 00 00                movl    $0x0, %eax
; /home/william/systemtap_write/systemtap/a.c:3
    1136: 5d                            popq    %rbp
    1137: c3                            retq
    1138: 0f 1f 84 00 00 00 00 00       nopl    (%rax,%rax)

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