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qom: trace asserting casts

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This provides a way to detect the cast that leads to a (reproducible)
crash even when QOM cast debugging is disabled.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1368188203-3407-6-git-send-email-pbonzini@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Paolo Bonzini 2013-05-10 14:16:39 +02:00 committed by Anthony Liguori
parent be17f18b8c
commit fa131d94a5
2 changed files with 12 additions and 1 deletions
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10
qom/object.c
View File

@ -16,6 +16,7 @@
#include "qapi/string-input-visitor.h"
#include "qapi/string-output-visitor.h"
#include "qapi/qmp/qerror.h"
#include "trace.h"
/* TODO: replace QObject with a simpler visitor to avoid a dependency
* of the QOM core on QObject? */
@ -436,6 +437,9 @@ Object *object_dynamic_cast_assert(Object *obj, const char *typename,
{
Object *inst;
trace_object_dynamic_cast_assert(obj ? obj->class->type->name : "(null)",
typename, file, line, func);
inst = object_dynamic_cast(obj, typename);
if (!inst && obj) {
@ -500,8 +504,12 @@ ObjectClass *object_class_dynamic_cast_assert(ObjectClass *class,
const char *file, int line,
const char *func)
{
ObjectClass *ret = object_class_dynamic_cast(class, typename);
ObjectClass *ret;
trace_object_class_dynamic_cast_assert(class ? class->type->name : "(null)",
typename, file, line, func);
ret = object_class_dynamic_cast(class, typename);
if (!ret && class) {
fprintf(stderr, "%s:%d:%s: Object %p is not an instance of type %s\n",
file, line, func, class, typename);

3
trace-events
View File

@ -1160,3 +1160,6 @@ kvm_vm_ioctl(int type, void *arg) "type %d, arg %p"
kvm_vcpu_ioctl(int cpu_index, int type, void *arg) "cpu_index %d, type %d, arg %p"
kvm_run_exit(int cpu_index, uint32_t reason) "cpu_index %d, reason %d"
# qom/object.c
object_dynamic_cast_assert(const char *type, const char *target, const char *file, int line, const char *func) "%s->%s (%s:%d:%s)"
object_class_dynamic_cast_assert(const char *type, const char *target, const char *file, int line, const char *func) "%s->%s (%s:%d:%s)"