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qom/object: Display more helpful message when a parent is missing 

QEMU object model is scarse in documentation. Some calls are
recursive, and it might be hard to figure out even trivial issues.

We can avoid developers to waste time in a debugging session by
displaying a simple error message.

This commit is also similar to e02bdf1cec ("Display more helpful
message when an object type is missing").

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200121110349.25842-7-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2020-01-21 12:03:45 +01:00 committed by Paolo Bonzini
parent d70c996df2
commit 89d337fdd2
1 changed files with 5 additions and 1 deletions
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6
qom/object.c
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@ -173,7 +173,11 @@ static TypeImpl *type_get_parent(TypeImpl *type)
{
if (!type->parent_type && type->parent) {
type->parent_type = type_get_by_name(type->parent);
g_assert(type->parent_type != NULL);
if (!type->parent_type) {
fprintf(stderr, "Type '%s' is missing its parent '%s'\n",
type->name, type->parent);
abort();
}
}
return type->parent_type;