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

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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;