Greg Tatum
2534cbb320
This wires in a ChromeProfilerCounter into the ChromeUtils so that counters can be created and incremented from Chrome-privileged JavaScript code. See the test_profiler_counter.js for the characterization of the behavior. There is some tricky ownership of the ChromeProfilerCounter object as the profiler retains a raw pointer. The refs are shared between the SpiderMonkey garbage collector and the profiler core. The lifetime management is independent between the two entities, but this is all exercised in the xpcshell test, and should hopefully be adequately documented. Differential Revision: https://phabricator.services.mozilla.com/D318281
40 lines
1.3 KiB
C++
40 lines
1.3 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/ProfilerCounter.h"
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#include "mozilla/ChromeProfilerCounter.h"
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#include "mozilla/dom/ProfilerCounterBinding.h"
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namespace mozilla::dom {
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NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(ProfilerCounter, mParent)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(ProfilerCounter)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(ProfilerCounter)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ProfilerCounter)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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ProfilerCounter::ProfilerCounter(
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nsISupports* aParent, already_AddRefed<ChromeProfilerCounter> aCounter)
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: mParent(aParent), mCounter(aCounter) {
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mCounter->Register();
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}
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ProfilerCounter::~ProfilerCounter() {
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// Unregister when the JS wrapper gets garbage collected. the native counter
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// may outlive this via the profiler's ref.
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mCounter->Unregister();
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}
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void ProfilerCounter::Add(int64_t aDelta) { mCounter->Add(aDelta); }
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JSObject* ProfilerCounter::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return ProfilerCounter_Binding::Wrap(aCx, this, aGivenProto);
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}
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} // namespace mozilla::dom
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