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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsCodeCoverage.h"
#include "mozilla/CodeCoverageHandler.h"
#include "mozilla/Unused.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/Promise.h"
using mozilla::dom::ContentParent;
using mozilla::dom::Promise;
NS_IMPL_ISUPPORTS(nsCodeCoverage, nsICodeCoverage)
nsCodeCoverage::nsCodeCoverage() {}
nsCodeCoverage::~nsCodeCoverage() {}
enum RequestType { Flush };
class ProcessCount final {
NS_INLINE_DECL_REFCOUNTING(ProcessCount);
public:
explicit ProcessCount(uint32_t c) : mCount(c) {}
operator uint32_t() const { return mCount; }
ProcessCount& operator--() {
mCount--;
return *this;
}
private:
~ProcessCount() {}
uint32_t mCount;
};
namespace {
nsresult Request(JSContext* cx, Promise** aPromise, RequestType requestType) {
MOZ_ASSERT(XRE_IsParentProcess());
MOZ_ASSERT(NS_IsMainThread());
nsIGlobalObject* global = xpc::CurrentNativeGlobal(cx);
if (NS_WARN_IF(!global)) {
return NS_ERROR_FAILURE;
}
mozilla::ErrorResult result;
RefPtr<Promise> promise = Promise::Create(global, result);
if (NS_WARN_IF(result.Failed())) {
return result.StealNSResult();
}
uint32_t processCount = 0;
for (auto* cp : ContentParent::AllProcesses(ContentParent::eLive)) {
mozilla::Unused << cp;
++processCount;
}
if (requestType == RequestType::Flush) {
mozilla::CodeCoverageHandler::FlushCounters();
}
if (processCount == 0) {
promise->MaybeResolveWithUndefined();
} else {
RefPtr<ProcessCount> processCountHolder(new ProcessCount(processCount));
auto resolve = [processCountHolder, promise](bool unused) {
if (--(*processCountHolder) == 0) {
promise->MaybeResolveWithUndefined();
}
};
auto reject = [promise](mozilla::ipc::ResponseRejectReason&& aReason) {
promise->MaybeReject(NS_ERROR_FAILURE);
};
for (auto* cp : ContentParent::AllProcesses(ContentParent::eLive)) {
if (requestType == RequestType::Flush) {
cp->SendFlushCodeCoverageCounters(resolve, reject);
}
}
}
promise.forget(aPromise);
return NS_OK;
}
} // anonymous namespace
NS_IMETHODIMP nsCodeCoverage::FlushCounters(JSContext* cx, Promise** aPromise) {
return Request(cx, aPromise, RequestType::Flush);
}
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