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Allow serialization of closures over Broker.

Browse source 
anonymous-functions, their closures, can now be sent over broker.
In order to send an anonymous function the receiver must have parsed
a definition of the functon, but it need not to have been evaluated.
See testing/btest/language/closure-sending.zeek for an example of how
this can be done.

This also sends their closures as well as the closures of regular
functions.
This commit is contained in:
Zeke Medley 2019-07-09 16:13:26 -07:00
parent f18464f1f8
commit f0798c4b49
19 changed files with 1060 additions and 160 deletions
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16
src/broker/Manager.cc
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@ -1042,10 +1042,20 @@ void Manager::ProcessEvent(const broker::topic& topic, broker::zeek::Event ev)
vl.append(val);
else
{
const char* expected_name = type_name(expected_type->Tag());
reporter->Warning("failed to convert remote event '%s' arg #%d,"
" got %s, expected %s",
name.data(), i, got_type,
type_name(expected_type->Tag()));
" got %s, expected %s",
name.data(), i, got_type,
expected_name);
// If we got a vector and expected a function this is possibly because of a mismatch
// between anonymous-function bodies.
if ( (strcmp( expected_name, "func") == 0) && (strcmp("vector", got_type) == 0) )
{
reporter->Warning("when sending functions the receiver must have access to a"
" version of that function.\nFor anonymous functions, that function must have the same body.");
}
break;
}
}