Commit ba3c35d9 authored by Richard Henderson's avatar Richard Henderson
Browse files

tcg/cpu-exec: precise single-stepping after an interrupt 



When single-stepping with a debugger attached to QEMU, and when an
interrupt is raised, the debugger misses the first instruction after
the interrupt.

Tested-by: default avatarLuc Michel <luc.michel@greensocs.com>
Reviewed-by: default avatarLuc Michel <luc.michel@greensocs.com>
Buglink: https://bugs.launchpad.net/qemu/+bug/757702


Message-Id: <20200717163029.2737546-1-richard.henderson@linaro.org>
Signed-off-by: default avatarRichard Henderson <richard.henderson@linaro.org>
parent a7ba744f

accel/tcg/cpu-exec.c

+7 −1
Original line number Diff line number Diff line
@@ -588,7 +588,13 @@ static inline bool cpu_handle_interrupt(CPUState *cpu, 
        else {

            if (cc->cpu_exec_interrupt(cpu, interrupt_request)) {

                replay_interrupt();

                cpu->exception_index = -1;

                /*

                 * After processing the interrupt, ensure an EXCP_DEBUG is

                 * raised when single-stepping so that GDB doesn't miss the

                 * next instruction.

                 */

                cpu->exception_index =

                    (cpu->singlestep_enabled ? EXCP_DEBUG : -1);

                *last_tb = NULL;

            }

            /* The target hook may have updated the 'cpu->interrupt_request';