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diff --git a/tools/profiler/docs/profilerthreadregistration.umlet.uxf b/tools/profiler/docs/profilerthreadregistration.umlet.uxf
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+++ b/tools/profiler/docs/profilerthreadregistration.umlet.uxf
@@ -0,0 +1,710 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<diagram program="umlet" version="15.0.0">
+ <zoom_level>10</zoom_level>
+ <element>
+ <id>UMLClass</id>
+ <coordinates>
+ <x>200</x>
+ <y>330</y>
+ <w>370</w>
+ <h>250</h>
+ </coordinates>
+ <panel_attributes>ThreadRegistry::OffThreadRef
+--
++UnlockedConstReaderCRef() const
++WithUnlockedConstReader(F&amp;&amp; aF) const
++UnlockedConstReaderAndAtomicRWCRef() const
++WithUnlockedConstReaderAndAtomicRW(F&amp;&amp; aF) const
++UnlockedConstReaderAndAtomicRWRef()
++WithUnlockedConstReaderAndAtomicRW(F&amp;&amp; aF)
++UnlockedRWForLockedProfilerCRef()
++WithUnlockedRWForLockedProfiler(F&amp;&amp; aF)
++UnlockedRWForLockedProfilerRef()
++WithUnlockedRWForLockedProfiler(F&amp;&amp; aF)
++ConstLockedRWFromAnyThread()
++WithConstLockedRWFromAnyThread(F&amp;&amp; aF)
++LockedRWFromAnyThread()
++WithLockedRWFromAnyThread(F&amp;&amp; aF)</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>UMLClass</id>
+ <coordinates>
+ <x>310</x>
+ <y>80</y>
+ <w>560</w>
+ <h>160</h>
+ </coordinates>
+ <panel_attributes>ThreadRegistry
+--
+-sRegistryMutex: RegistryMutex (aka BaseProfilerSharedMutex)
+/exclusive lock used during un/registration, shared lock for other accesses/
+--
+friend class ThreadRegistration
+-Register(ThreadRegistration::OnThreadRef)
+-Unregister(ThreadRegistration::OnThreadRef)
+--
++WithOffThreadRef(ProfilerThreadId, auto&amp;&amp; aF) static
++WithOffThreadRefOr(ProfilerThreadId, auto&amp;&amp; aF, auto&amp;&amp; aFallbackReturn) static: auto</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>UMLClass</id>
+ <coordinates>
+ <x>310</x>
+ <y>630</y>
+ <w>530</w>
+ <h>260</h>
+ </coordinates>
+ <panel_attributes>ThreadRegistration
+--
+-mDataMutex: DataMutex (aka BaseProfilerMutex)
+-mIsOnHeap: bool
+-mIsRegistryLockedSharedOnThisThread: bool
+-tlsThreadRegistration: MOZ_THREAD_LOCAL(ThreadRegistration*)
+-GetTLS() static: tlsThreadRegistration*
+-GetFromTLS() static: ThreadRegistration*
+--
++ThreadRegistration(const char* aName, const void* aStackTop)
++~ThreadRegistration()
++RegisterThread(const char* aName, const void* aStackTop) static: ProfilingStack*
++UnregisterThread() static
++IsRegistered() static: bool
++GetOnThreadPtr() static OnThreadPtr
++WithOnThreadRefOr(auto&amp;&amp; aF, auto&amp;&amp; aFallbackReturn) static: auto
++IsDataMutexLockedOnCurrentThread() static: bool</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>UMLClass</id>
+ <coordinates>
+ <x>880</x>
+ <y>620</y>
+ <w>450</w>
+ <h>290</h>
+ </coordinates>
+ <panel_attributes>ThreadRegistration::OnThreadRef
+--
++UnlockedConstReaderCRef() const
++WithUnlockedConstReader(auto&amp;&amp; aF) const: auto
++UnlockedConstReaderAndAtomicRWCRef() const
++WithUnlockedConstReaderAndAtomicRW(auto&amp;&amp; aF) const: auto
++UnlockedConstReaderAndAtomicRWRef()
++WithUnlockedConstReaderAndAtomicRW(auto&amp;&amp; aF): auto
++UnlockedRWForLockedProfilerCRef() const
++WithUnlockedRWForLockedProfiler(auto&amp;&amp; aF) const: auto
++UnlockedRWForLockedProfilerRef()
++WithUnlockedRWForLockedProfiler(auto&amp;&amp; aF): auto
++UnlockedReaderAndAtomicRWOnThreadCRef() const
++WithUnlockedReaderAndAtomicRWOnThread(auto&amp;&amp; aF) const: auto
++UnlockedReaderAndAtomicRWOnThreadRef()
++WithUnlockedReaderAndAtomicRWOnThread(auto&amp;&amp; aF): auto
++RWOnThreadWithLock LockedRWOnThread()
++WithLockedRWOnThread(auto&amp;&amp; aF): auto</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>UMLClass</id>
+ <coordinates>
+ <x>1040</x>
+ <y>440</y>
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+ </coordinates>
+ <panel_attributes>ThreadRegistration::OnThreadPtr
+--
++operator*(): OnThreadRef
++operator-&gt;(): OnThreadRef</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>UMLClass</id>
+ <coordinates>
+ <x>450</x>
+ <y>940</y>
+ <w>350</w>
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+ </coordinates>
+ <panel_attributes>ThreadRegistrationData
+--
+-mProfilingStack: ProfilingStack
+-mStackTop: const void* const
+-mThread: nsCOMPtr&lt;nsIThread&gt;
+-mJSContext: JSContext*
+-mJsFrameBuffer: JsFrame*
+-mJSFlags: uint32_t
+-Sleep: Atomic&lt;int&gt;
+-mThreadCpuTimeInNsAtLastSleep: Atomic&lt;uint64_t&gt;
+-mWakeCount: Atomic&lt;uint64_t, Relaxed&gt;
+-mRecordWakeCountMutex: BaseProfilerMutex
+-mAlreadyRecordedWakeCount: uint64_t
+-mAlreadyRecordedCpuTimeInMs: uin64_t
+-mThreadProfilingFeatures: ThreadProfilingFeatures</panel_attributes>
+ <additional_attributes/>
+ </element>
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+ <y>1220</y>
+ <w>330</w>
+ <h>80</h>
+ </coordinates>
+ <panel_attributes>ThreadRegistrationUnlockedConstReader
+--
++Info() const: const ThreadRegistrationInfo&amp;
++PlatformDataCRef() const: const PlatformData&amp;
++StackTop() const: const void*</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>UMLClass</id>
+ <coordinates>
+ <x>440</x>
+ <y>1340</y>
+ <w>370</w>
+ <h>190</h>
+ </coordinates>
+ <panel_attributes>ThreadRegistrationUnlockedConstReaderAndAtomicRW
+--
++ProfilingStackCRef() const: const ProfilingStack&amp;
++ProfilingStackRef(): ProfilingStack&amp;
++ProfilingFeatures() const: ThreadProfilingFeatures
++SetSleeping()
++SetAwake()
++GetNewCpuTimeInNs(): uint64_t
++RecordWakeCount() const
++ReinitializeOnResume()
++CanDuplicateLastSampleDueToSleep(): bool
++IsSleeping(): bool</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>UMLClass</id>
+ <coordinates>
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+ <y>1570</y>
+ <w>330</w>
+ <h>60</h>
+ </coordinates>
+ <panel_attributes>ThreadRegistrationUnlockedRWForLockedProfiler
+--
++GetProfiledThreadData(): const ProfiledThreadData*
++GetProfiliedThreadData(): ProfiledThreadData*</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>UMLClass</id>
+ <coordinates>
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+ <y>1670</y>
+ <w>390</w>
+ <h>50</h>
+ </coordinates>
+ <panel_attributes>ThreadRegistrationUnlockedReaderAndAtomicRWOnThread
+--
++GetJSContext(): JSContext*</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>UMLClass</id>
+ <coordinates>
+ <x>380</x>
+ <y>1840</y>
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+ </coordinates>
+ <panel_attributes>ThreadRegistrationLockedRWFromAnyThread
+--
++SetProfilingFeaturesAndData(
+ ThreadProfilingFeatures, ProfiledThreadData*, const PSAutoLock&amp;)
++ClearProfilingFeaturesAndData(const PSAutoLock&amp;)
++GetJsFrameBuffer() const JsFrame*
++GetEventTarget() const: const nsCOMPtr&lt;nsIEventTarget&gt;
++ResetMainThread()
++GetRunningEventDelay(const TimeStamp&amp;, TimeDuration&amp;, TimeDuration&amp;)
++StartJSSampling(uint32_t)
++StopJSSampling()</panel_attributes>
+ <additional_attributes/>
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+ <element>
+ <id>UMLClass</id>
+ <coordinates>
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+ <y>2070</y>
+ <w>260</w>
+ <h>80</h>
+ </coordinates>
+ <panel_attributes>ThreadRegistrationLockedRWOnThread
+--
++SetJSContext(JSContext*)
++ClearJSContext()
++PollJSSampling()</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>Relation</id>
+ <coordinates>
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+ <h>60</h>
+ </coordinates>
+ <panel_attributes>ThreadRegistration::EmbeddedData
+--</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>Relation</id>
+ <coordinates>
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+ <y>1290</y>
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+ <coordinates>
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+ <w>30</w>
+ <h>70</h>
+ </coordinates>
+ <panel_attributes>lt=&lt;&lt;-</panel_attributes>
+ <additional_attributes>10.0;10.0;10.0;50.0</additional_attributes>
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+ <element>
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+ <coordinates>
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+mData</panel_attributes>
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+ <panel_attributes>ThreadRegistrationInfo
+--
++Name(): const char*
++RegisterTime(): const TimeStamp&amp;
++ThreadId(): ProfilerThreadId
++IsMainThread(): bool</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>Relation</id>
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+ <panel_attributes>PlatformData
+--
+</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>Relation</id>
+ <coordinates>
+ <x>790</x>
+ <y>1040</y>
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+ </coordinates>
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+ <panel_attributes>ProfiledThreadData
+--</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>Relation</id>
+ <coordinates>
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+m1=0..1
+mThreadRegistration: *</panel_attributes>
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+ <element>
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+ <additional_attributes>10.0;540.0;420.0;540.0;420.0;10.0</additional_attributes>
+ </element>
+ <element>
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+ <coordinates>
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+ <panel_attributes>lt=&lt;.
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+ <panel_attributes>ThreadRegistration::OnThreadRef::ConstRWOnThreadWithLock
+--
+-mDataLock: BaseProfilerAutoLock
+--
++DataCRef() const: ThreadRegistrationLockedRWOnThread&amp;
++operator-&gt;() const: ThreadRegistrationLockedRWOnThread&amp;</panel_attributes>
+ <additional_attributes/>
+ </element>
+ <element>
+ <id>Relation</id>
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+ <panel_attributes>lt=-&gt;&gt;&gt;&gt;
+m1=0..N
+sRegistryContainer:
+static Vector&lt;&gt;</panel_attributes>
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+ <panel_attributes>ThreadRegistry::LockedRegistry
+--
+-mRegistryLock: RegistryLockShared (aka BaseProfilerAutoLockShared)
+--
++LockedRegistry()
++~LockedRegistry()
++begin() const: const OffThreadRef*
++end() const: const OffThreadRef*
++begin(): OffThreadRef*
++end(): OffThreadRef*</panel_attributes>
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+shared lock&gt;</panel_attributes>
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+&lt;updates
+mIsRegistryLockedSharedOnThisThread&gt;</panel_attributes>
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+ <coordinates>
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+m1=1
+mThreadRegistration: *</panel_attributes>
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+ <panel_attributes>ThreadRegistry::OffThreadRef::{,Const}RWFromAnyThreadWithLock
+--
+-mDataLock: BaseProfilerAutoLock
+--
++DataCRef() {,const}: ThreadRegistrationLockedRWOnThread&amp;
++operator-&gt;() {,const}: ThreadRegistrationLockedRWOnThread&amp;</panel_attributes>
+ <additional_attributes/>
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+ </coordinates>
+ <panel_attributes>lt=-&gt;&gt;&gt;&gt;
+mLockedRWFromAnyThread</panel_attributes>
+ <additional_attributes>200.0;100.0;80.0;100.0;80.0;10.0</additional_attributes>
+ </element>
+</diagram>