[Bug binutils/24404] New: addr2line file and line not accurate compared to gdb

[jg at jguk dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=24404

            Bug ID: 24404
           Summary: addr2line file and line not accurate compared to gdb
           Product: binutils
           Version: 2.30
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: jg at jguk dot org
  Target Milestone: ---

Created attachment 11715
  --> https://sourceware.org/bugzilla/attachment.cgi?id=11715&action=edit
test case

It feels like addr2line is not outputting valid file:line compared to GDB.
I'll attach my little backtracer. Output is below. when code is optimized -O1,
the output shows basic_string.h:176 is _M_data() in that STL file. instead of
the regular file and line

1. compile the attached test case
2. run addr2line -e exception4 0x15c1
3. the output below [3] is meant to be exception4.cpp:84




$ ./exception4
Unhandled C++ exception: [vector::_M_range_check: __n (which is 0) >=
this->size() (which is 0)]

Backtrace:
[0]: ./exception4(+0x11da) [0x55cfa17411da]
print_trace()
exception4.cpp:20
[1]: ./exception4(+0x15c1) [0x55cfa17415c1]
test()
basic_string.h:176
[2]: ./exception4(+0x1627) [0x55cfa1741627]
main
exception4.cpp:94
[3]: /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7fe576d0cb97]
??
??:0
[4]: ./exception4(+0x10ca) [0x55cfa17410ca]
_start
??:?
Segmentation fault (core dumped)
$
$ gdb -c core exception4
GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from exception4...done.
[New LWP 3468]
Core was generated by `./exception4'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  __GI_raise (sig=<optimised out>) at ../sysdeps/unix/sysv/linux/raise.c:51
51      ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  __GI_raise (sig=<optimised out>) at ../sysdeps/unix/sysv/linux/raise.c:51
#1  0x000055cfa1741508 in print_trace () at exception4.cpp:73
#2  0x000055cfa17415c1 in test () at exception4.cpp:86
#3  0x000055cfa1741627 in main () at exception4.cpp:93

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