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x86: Optionally dump code bytes on cpu_dump_state

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Introduce the cpu_dump_state flag CPU_DUMP_CODE and implement it for
x86. This writes out the code bytes around the current instruction
pointer. Make use of this feature in KVM to help debugging fatal vm
exits.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Jan Kiszka 2011-01-21 21:48:08 +01:00 • committed by Marcelo Tosatti
parent bb44e0d12d
commit f5c848eed7
3 changed files with 25 additions and 2 deletions
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4
kvm-all.c
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@ -832,7 +832,7 @@ static int kvm_handle_internal_error(CPUState *env, struct kvm_run *run)
if (run->internal.suberror == KVM_INTERNAL_ERROR_EMULATION) {
fprintf(stderr, "emulation failure\n");
if (!kvm_arch_stop_on_emulation_error(env)) {
cpu_dump_state(env, stderr, fprintf, 0);
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
return 0;
}
}
@ -994,7 +994,7 @@ int kvm_cpu_exec(CPUState *env)
} while (ret > 0);
if (ret < 0) {
cpu_dump_state(env, stderr, fprintf, 0);
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
vm_stop(0);
env->exit_request = 1;
}