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gdbstub: gdb_set_stop_cpu: ignore request when process is not attached 

When gdb_set_stop_cpu() is called with a CPU associated to a process
currently not attached by the GDB client, return without modifying the
stop CPU. Otherwise, GDB gets confused if it receives packets with a
thread-id it does not know about.

Signed-off-by: Luc Michel <luc.michel@greensocs.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 20181207090135.7651-15-luc.michel@greensocs.com
[PMM: fix checkpatch comment style nit]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Luc Michel 2019-01-07 15:23:46 +00:00 committed by Peter Maydell
parent 970ed9064a
commit 160d858dd6
1 changed files with 10 additions and 0 deletions
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10
gdbstub.c
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@ -1798,6 +1798,16 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf)
void gdb_set_stop_cpu(CPUState *cpu)
{
GDBProcess *p = gdb_get_cpu_process(gdbserver_state, cpu);
if (!p->attached) {
/*
* Having a stop CPU corresponding to a process that is not attached
* confuses GDB. So we ignore the request.
*/
return;
}
gdbserver_state->c_cpu = cpu;
gdbserver_state->g_cpu = cpu;
}