[Bug libc/24401] New: backtrace_symbols not accurate with optimisation -O1

["jg at jguk dot org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=24401

            Bug ID: 24401
           Summary: backtrace_symbols not accurate with optimisation -O1
           Product: glibc
           Version: 2.27
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: jg at jguk dot org
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

Created attachment 11710
  --> https://sourceware.org/bugzilla/attachment.cgi?id=11710&action=edit
test case

$ ldd --version
ldd (Ubuntu GLIBC 2.27-3ubuntu1) 2.27


Test case attached
$ g++-8 -g -pipe -pthread -O1 -o exception4 exception4.cpp

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

Backtrace:
0x0000000000001573: test() at basic_string.h:176
[1]: ./exception4(+0x1573) [0x55c1fcff3573]
0x00000000000015d9: main at exception4.cpp:93
[2]: ./exception4(+0x15d9) [0x55c1fcff35d9]
0x0000000000000000: ?? ??:0
[3]: /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7f4152662b97]
0x000000000000108a: _start at ??:?
[4]: ./exception4(+0x108a) [0x55c1fcff308a]


Expected:
$ g++-8 -Wall -g -o exception4 exception4.cpp

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

Backtrace:
0x0000000000001505: test() at exception4.cpp:81
[1]: ./exception4(+0x1505) [0x562022cdd505]
0x000000000000156c: main at exception4.cpp:93
[2]: ./exception4(+0x156c) [0x562022cdd56c]
0x0000000000000000: ?? ??:0
[3]: /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7f2923475b97]
0x0000000000000fea: _start at ??:?
[4]: ./exception4(+0xfea) [0x562022cdcfea]

-- 
You are receiving this mail because:
You are on the CC list for the bug.