[Qemu-devel] [Bug 1031920] [NEW] Linux user gdbserver does not respond to remote `Ctrl-C' interrupts

[Meador Inge]

Public bug reported:

The bug was reproduced in a recent mainline build for ARM Linux by
starting emulation with a gdbserver:

$ qemu-arm -g 1234 a.out

and then connecting from gdb:

(gdb) target remote :1234
Remote debugging using :1234
[New Remote target]
[Switching to Remote target]
0x00008ba8 in _start ()
(gdb) b main
Breakpoint 1 at 0x8cb0: file hello.c, line 5.
(gdb) cont
Continuing.

Breakpoint 1, main (argc=1, argv=0xf6fff24c) at hello.c:5
5         int n = 0;
(gdb) l
1       #include <stdio.h>
2
3       int main (int argc, char **argv)
4       {
5         int n = 0;
6
7         for (;;) {
8            printf ("Hello, World!\n");
9            sleep (5);
10        }
(gdb) cont
Continuing.
^C^CInterrupted while waiting for the program.
Give up (and stop debugging it)? (y or n) y

Notice that the `Ctrl-C' interrupts are ignored.

** Affects: qemu
     Importance: Undecided
         Status: New

** Description changed:

- The bug was reproduce in a recent mainline build for ARM Linux by
+ The bug was reproduced in a recent mainline build for ARM Linux by
  starting emulation with a gdbserver:
  
  $ qemu-arm -g 1234 a.out
  
  and then connecting from gdb:
  
  (gdb) target remote :1234
  Remote debugging using :1234
  [New Remote target]
  [Switching to Remote target]
  0x00008ba8 in _start ()
  (gdb) b main
  Breakpoint 1 at 0x8cb0: file hello.c, line 5.
  (gdb) cont
  Continuing.
  
  Breakpoint 1, main (argc=1, argv=0xf6fff24c) at hello.c:5
  5       int n = 0;
  (gdb) l
  1     #include <stdio.h>
- 2     
+ 2
  3     int main (int argc, char **argv)
  4     {
  5       int n = 0;
- 6     
+ 6
  7       for (;;) {
  8          printf ("Hello, World!\n");
  9          sleep (5);
  10      }
  (gdb) cont
  Continuing.
  ^C^CInterrupted while waiting for the program.
  Give up (and stop debugging it)? (y or n) y
  
  Notice that the `Ctrl-C' interrupts are ignored.

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https://bugs.launchpad.net/bugs/1031920

Title:
  Linux user gdbserver does not respond to remote  `Ctrl-C' interrupts

Status in QEMU:
  New

Bug description:
  The bug was reproduced in a recent mainline build for ARM Linux by
  starting emulation with a gdbserver:

  $ qemu-arm -g 1234 a.out

  and then connecting from gdb:

  (gdb) target remote :1234
  Remote debugging using :1234
  [New Remote target]
  [Switching to Remote target]
  0x00008ba8 in _start ()
  (gdb) b main
  Breakpoint 1 at 0x8cb0: file hello.c, line 5.
  (gdb) cont
  Continuing.

  Breakpoint 1, main (argc=1, argv=0xf6fff24c) at hello.c:5
  5       int n = 0;
  (gdb) l
  1     #include <stdio.h>
  2
  3     int main (int argc, char **argv)
  4     {
  5       int n = 0;
  6
  7       for (;;) {
  8          printf ("Hello, World!\n");
  9          sleep (5);
  10      }
  (gdb) cont
  Continuing.
  ^C^CInterrupted while waiting for the program.
  Give up (and stop debugging it)? (y or n) y

  Notice that the `Ctrl-C' interrupts are ignored.

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