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localVatManager.js
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localVatManager.js
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/* global harden */
import { assert } from '@agoric/assert';
import { importBundle } from '@agoric/import-bundle';
import { makeLiveSlots } from '../liveSlots';
import { createSyscall } from './syscall';
import { makeDeliver } from './deliver';
import { makeTranscriptManager } from './transcript';
export function makeLocalVatManagerFactory(tools) {
const {
allVatPowers,
kernelKeeper,
vatEndowments,
meterManager,
transformMetering,
waitUntilQuiescent,
} = tools;
const { makeGetMeter, refillAllMeters, stopGlobalMeter } = meterManager;
const baseVP = {
Remotable: allVatPowers.Remotable,
getInterfaceOf: allVatPowers.getInterfaceOf,
transformTildot: allVatPowers.transformTildot,
};
const internalMeteringVP = {
makeGetMeter: allVatPowers.makeGetMeter,
transformMetering: allVatPowers.transformMetering,
};
// testLog is also a vatPower, only for unit tests
function prepare(vatID, managerOptions = {}) {
const { notifyTermination = undefined } = managerOptions;
const vatKeeper = kernelKeeper.allocateVatKeeperIfNeeded(vatID);
const transcriptManager = makeTranscriptManager(
kernelKeeper,
vatKeeper,
vatID,
);
const { syscall, setVatSyscallHandler } = createSyscall(transcriptManager);
function finish(dispatch, meterRecord) {
assert(
dispatch && dispatch.deliver,
`vat failed to return a 'dispatch' with .deliver: ${dispatch}`,
);
const { deliver, replayTranscript } = makeDeliver(
{
vatID,
stopGlobalMeter,
notifyTermination,
meterRecord,
refillAllMeters,
transcriptManager,
vatKeeper,
waitUntilQuiescent,
},
dispatch,
);
async function shutdown() {
// local workers don't need anything special to shut down between turns
}
const manager = harden({
replayTranscript,
setVatSyscallHandler,
deliver,
shutdown,
notifyTermination,
});
return manager;
}
return { syscall, finish };
}
function createFromSetup(vatID, setup, managerOptions) {
assert(!managerOptions.metered, `unsupported`);
assert(!managerOptions.enableInternalMetering, `unsupported`);
assert(!managerOptions.notifyTermination, `unsupported`);
assert(setup instanceof Function, 'setup is not an in-realm function');
const { syscall, finish } = prepare(vatID, managerOptions);
const { vatParameters } = managerOptions;
const { testLog } = allVatPowers;
const helpers = harden({}); // DEPRECATED, todo remove from setup()
const state = null; // TODO remove from setup()
const vatPowers = harden({ ...baseVP, vatParameters, testLog });
const dispatch = setup(syscall, state, helpers, vatPowers);
const meterRecord = null;
const manager = finish(dispatch, meterRecord);
return manager;
}
async function createFromBundle(vatID, bundle, managerOptions) {
const {
metered = false,
enableSetup = false,
enableInternalMetering = false,
vatParameters = {},
vatConsole,
} = managerOptions;
assert(vatConsole, 'vats need managerOptions.vatConsole');
let meterRecord = null;
if (metered) {
// fail-stop: we refill the meter after each crank (in vatManager
// doProcess()), but if the vat exhausts its meter within a single
// crank, it will never run again. We set refillEachCrank:false because
// we want doProcess to do the refilling itself, so it can count the
// usage
meterRecord = makeGetMeter({
refillEachCrank: false,
refillIfExhausted: false,
});
}
const inescapableTransforms = [];
const inescapableGlobalLexicals = {};
if (metered) {
const getMeter = meterRecord.getMeter;
inescapableTransforms.push(src => transformMetering(src, getMeter));
inescapableGlobalLexicals.getMeter = getMeter;
}
const vatNS = await importBundle(bundle, {
filePrefix: vatID,
endowments: harden({ ...vatEndowments, console: vatConsole }),
inescapableTransforms,
inescapableGlobalLexicals,
});
const { syscall, finish } = prepare(vatID, managerOptions);
const imVP = enableInternalMetering ? internalMeteringVP : {};
const vatPowers = harden({
...baseVP,
...imVP,
vatParameters,
testLog: allVatPowers.testLog,
});
const state = null; // TODO remove from makeLiveSlots()
let dispatch;
if (typeof vatNS.buildRootObject === 'function') {
const { buildRootObject } = vatNS;
dispatch = makeLiveSlots(
syscall,
state,
buildRootObject,
vatID,
vatPowers,
vatParameters,
);
} else {
const setup = vatNS.default;
assert(setup, `vat source bundle lacks (default) setup() function`);
assert(setup instanceof Function, `setup is not a function`);
assert(enableSetup, `got setup(), but not options.enableSetup`);
const helpers = harden({}); // DEPRECATED, todo remove from setup()
dispatch = setup(syscall, state, helpers, vatPowers);
}
const manager = finish(dispatch, meterRecord);
return manager;
}
const localVatManagerFactory = harden({
createFromBundle,
createFromSetup,
});
return localVatManagerFactory;
}