Assertion `pc_in_thread_step_range (pc, tp)' failed when executing int3 instruction

Assertion `pc_in_thread_step_range (pc, tp)' failed when executing int3 instruction

[peter0x44]

For the following code:

#include <stdio.h>

int main(void)
{
     __asm__("int3");
     // give code to step through
     for (int i = 0; i < 10; ++i)
     {
         printf("%d\n", i);
     }
}
Compiled with:
gcc -o int3 -g3 -O2

When I try debugging under GDB 13.2, I get the following:

0x7fb54815cd89 ???
0x558eebc578e4 ???
0xffffffffffffffff ???
---------------------
../../gdb/infrun.c:2640: internal-error: resume_1: Assertion 
`pc_in_thread_step_range (pc, tp)' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) n

This is a bug, please report it.  For instructions, see:
<https://www.gnu.org/software/gdb/bugs/>.

This instruction seems to be the standard way to implement a breakpoint 
from code.
Clang has an intrinsic __builtin_debugtrap() which generates it, and 
Microsoft Visual C++ generates it from __debugbreak().

Re: Assertion `pc_in_thread_step_range (pc, tp)' failed when executing int3 instruction

[Simon Marchi]

On 2023-12-15 20:45, peter0x44 via Gdb wrote:
> For the following code:
> 
> #include <stdio.h>
> 
> int main(void)
> {
>     __asm__("int3");
>     // give code to step through
>     for (int i = 0; i < 10; ++i)
>     {
>         printf("%d\n", i);
>     }
> }
> Compiled with:
> gcc -o int3 -g3 -O2
> 
> When I try debugging under GDB 13.2, I get the following:
> 
> 0x7fb54815cd89 ???
> 0x558eebc578e4 ???
> 0xffffffffffffffff ???
> ---------------------
> ../../gdb/infrun.c:2640: internal-error: resume_1: Assertion `pc_in_thread_step_range (pc, tp)' failed.
> A problem internal to GDB has been detected,
> further debugging may prove unreliable.
> Quit this debugging session? (y or n) n
> 
> This is a bug, please report it.  For instructions, see:
> <https://www.gnu.org/software/gdb/bugs/>.
> 
> This instruction seems to be the standard way to implement a breakpoint from code.
> Clang has an intrinsic __builtin_debugtrap() which generates it, and Microsoft Visual C++ generates it from __debugbreak().

I think that this bug is for the same thing, so discussions are going to happen there.

https://sourceware.org/bugzilla/show_bug.cgi?id=31194

Simon