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whpx: Added support for breakpoints and stepping

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Below is the updated version of the patch adding debugging support to WHPX.
It incorporates feedback from Alex Bennée and Peter Maydell regarding not
changing the emulation logic depending on the gdb connection status.

Instead of checking for an active gdb connection to determine whether QEMU
should intercept the INT1 exceptions, it now checks whether any breakpoints
have been set, or whether gdb has explicitly requested one or more CPUs to
do single-stepping. Having none of these condition present now has the same
effect as not using gdb at all.

Message-Id: <0e7f01d82e9e$00e9c360$02bd4a20$@sysprogs.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Ivan Shcherbakov 2022-03-02 17:28:33 -08:00 • committed by Paolo Bonzini
parent 9d734b85ed
commit d7482ffe97
8 changed files with 815 additions and 18 deletions
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1
target/i386/whpx/whpx-accel-ops.h
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@ -21,6 +21,7 @@ void whpx_cpu_synchronize_state(CPUState *cpu);
void whpx_cpu_synchronize_post_reset(CPUState *cpu);
void whpx_cpu_synchronize_post_init(CPUState *cpu);
void whpx_cpu_synchronize_pre_loadvm(CPUState *cpu);
void whpx_cpu_synchronize_pre_resume(bool step_pending);
/* state subset only touched by the VCPU itself during runtime */
#define WHPX_SET_RUNTIME_STATE 1