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No issue - add API to tell Profile Timeline Recording state to JS engine

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Based-on: m-c 1342070/5
This commit is contained in:
Martok 2023-01-21 22:48:18 +01:00 • committed by roytam1
commit 531906eb87
3 changed files with 37 additions and 0 deletions
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7
docshell/base/timeline/TimelineConsumers.cpp
View file

@ -6,6 +6,7 @@
#include "TimelineConsumers.h"
#include "mozilla/ClearOnShutdown.h"
#include "jsapi.h"
#include "nsAppRunner.h" // for XRE_IsContentProcess, XRE_IsParentProcess
#include "nsDocShell.h"
@ -125,6 +126,9 @@ TimelineConsumers::AddConsumer(nsDocShell* aDocShell)
UniquePtr<ObservedDocShell>& observed = aDocShell->mObserved;
MOZ_ASSERT(!observed);
if (mActiveConsumers == 0) {
JS::SetProfileTimelineRecordingEnabled(true);
}
mActiveConsumers++;
ObservedDocShell* obsDocShell = new ObservedDocShell(aDocShell);
@ -144,6 +148,9 @@ TimelineConsumers::RemoveConsumer(nsDocShell* aDocShell)
MOZ_ASSERT(observed);
mActiveConsumers--;
if (mActiveConsumers == 0) {
JS::SetProfileTimelineRecordingEnabled(false);
}
// Clear all markers from the `mTimelineMarkers` store.
observed.get()->ClearMarkers();

14
js/src/jsapi.cpp
View file

@ -1276,6 +1276,20 @@ JS::detail::ComputeThis(JSContext* cx, Value* vp)
return thisv;
}
static bool gProfileTimelineRecordingEnabled = false;
JS_PUBLIC_API(void)
JS::SetProfileTimelineRecordingEnabled(bool enabled)
{
gProfileTimelineRecordingEnabled = enabled;
}
JS_PUBLIC_API(bool)
JS::IsProfileTimelineRecordingEnabled()
{
return gProfileTimelineRecordingEnabled;
}
JS_PUBLIC_API(void*)
JS_malloc(JSContext* cx, size_t nbytes)
{

16
js/src/jsapi.h
View file

@ -1545,6 +1545,22 @@ JS_DefineProfilingFunctions(JSContext* cx, JS::HandleObject obj);
extern JS_PUBLIC_API(bool)
JS_DefineDebuggerObject(JSContext* cx, JS::HandleObject obj);
namespace JS {
/**
* Tell JS engine whether Profile Timeline Recording is enabled or not.
* If Profile Timeline Recording is enabled, data shown there like stack won't
* be optimized out.
* This is global state and not associated with specific runtime or context.
*/
extern JS_PUBLIC_API(void)
SetProfileTimelineRecordingEnabled(bool enabled);
extern JS_PUBLIC_API(bool)
IsProfileTimelineRecordingEnabled();
} // namespace JS
#ifdef JS_HAS_CTYPES
/**
* Initialize the 'ctypes' object on a global variable 'obj'. The 'ctypes'