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From: "stanislav.simek at siemens dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/99649] GDB has issue to show backtrace if the breakpoint
 is in a function with more then 8 parameters - only for target
 aarch64-elf ILP32
Date: Fri, 14 May 2021 07:46:49 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99649

--- Comment #7 from Stanislav =C5=A0imek <stanislav.simek at siemens dot co=
m> ---
(In reply to Richard Biener from comment #3)
> It sounds like this should be a bug for gdb.


Hi all,
I would like to add more information for this topic:

This error occurs in case that your function, call the function that has mo=
re
than 8 params.

Eq.
int sum(int x1,int x2 int x3,int x4,int x5,int x6,int x7,int x8,int x9 );=20

int test(int input1 )=20
{
  int c =3D 0;

  if(input1 =3D=3D 2) // <- If you have breakpoint here, callstack is corru=
pted
  {
    c +=3Dinput1;
  }

  c =3Dsum(1,2,3,4,5,6,7,c,input1);
  return c;
}


If you remove the call of sum function, then everything works.
If you optimize function " int test(int) " with O0,O1 and O3, it works
Only for O2 this problem occurs.

So isn't it gcc problem?=