Differential D3095 Diff 14017 ps/trunk/source/scriptinterface/ScriptContext.cpp

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ps/trunk/source/scriptinterface/ScriptContext.cpp

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#include "ScriptContext.h"		#include "ScriptContext.h"

#include "ps/GameSetup/Config.h"		#include "ps/GameSetup/Config.h"
#include "ps/Profile.h"		#include "ps/Profile.h"
#include "scriptinterface/ScriptEngine.h"		#include "scriptinterface/ScriptEngine.h"
#include "scriptinterface/ScriptInterface.h"		#include "scriptinterface/ScriptInterface.h"


void GCSliceCallbackHook(JSRuntime* UNUSED(rt), JS::GCProgress progress, const JS::GCDescription& UNUSED(desc))		void GCSliceCallbackHook(JSContext* UNUSED(cx), JS::GCProgress progress, const JS::GCDescription& UNUSED(desc))
{		{
/*		/*
* During non-incremental GC, the GC is bracketed by JSGC_CYCLE_BEGIN/END		* During non-incremental GC, the GC is bracketed by JSGC_CYCLE_BEGIN/END
* callbacks. During an incremental GC, the sequence of callbacks is as		* callbacks. During an incremental GC, the sequence of callbacks is as
* follows:		* follows:
* JSGC_CYCLE_BEGIN, JSGC_SLICE_END (first slice)		* JSGC_CYCLE_BEGIN, JSGC_SLICE_END (first slice)
* JSGC_SLICE_BEGIN, JSGC_SLICE_END (second slice)		* JSGC_SLICE_BEGIN, JSGC_SLICE_END (second slice)
* ...		* ...
Show All 27 Lines	void GCSliceCallbackHook(JSContext* UNUSED(cx), JS::GCProgress progress, const JS::GCDescription& UNUSED(desc))
}		}

// The following code can be used to print some information aobut garbage collection		// The following code can be used to print some information aobut garbage collection
// Search for "Nonincremental reason" if there are problems running GC incrementally.		// Search for "Nonincremental reason" if there are problems running GC incrementally.
#if 0		#if 0
if (progress == JS::GCProgress::GC_CYCLE_BEGIN)		if (progress == JS::GCProgress::GC_CYCLE_BEGIN)
printf("starting cycle ===========================================\n");		printf("starting cycle ===========================================\n");

const char16_t* str = desc.formatMessage(rt);		const char16_t* str = desc.formatMessage(cx);
int len = 0;		int len = 0;

for(int i = 0; i < 10000; i++)		for(int i = 0; i < 10000; i++)
{		{
len++;		len++;
if(!str[i])		if(!str[i])
break;		break;
}		}
Show All 17 Lines
ScriptContext::ScriptContext(int contextSize, int heapGrowthBytesGCTrigger):		ScriptContext::ScriptContext(int contextSize, int heapGrowthBytesGCTrigger):
m_LastGCBytes(0),		m_LastGCBytes(0),
m_LastGCCheck(0.0f),		m_LastGCCheck(0.0f),
m_HeapGrowthBytesGCTrigger(heapGrowthBytesGCTrigger),		m_HeapGrowthBytesGCTrigger(heapGrowthBytesGCTrigger),
m_ContextSize(contextSize)		m_ContextSize(contextSize)
{		{
ENSURE(ScriptEngine::IsInitialised() && "The ScriptEngine must be initialized before constructing any ScriptContexts!");		ENSURE(ScriptEngine::IsInitialised() && "The ScriptEngine must be initialized before constructing any ScriptContexts!");

m_rt = JS_NewRuntime(contextSize, JS::DefaultNurseryBytes, nullptr);		m_cx = JS_NewContext(contextSize, JS::DefaultNurseryBytes, nullptr);
ENSURE(m_rt); // TODO: error handling		ENSURE(m_cx); // TODO: error handling

		ENSURE(JS::InitSelfHostedCode(m_cx));

JS::SetGCSliceCallback(m_rt, GCSliceCallbackHook);		JS::SetGCSliceCallback(m_cx, GCSliceCallbackHook);

JS_SetGCParameter(m_rt, JSGC_MAX_MALLOC_BYTES, m_ContextSize);		JS_SetGCParameter(m_cx, JSGC_MAX_MALLOC_BYTES, m_ContextSize);
JS_SetGCParameter(m_rt, JSGC_MAX_BYTES, m_ContextSize);		JS_SetGCParameter(m_cx, JSGC_MAX_BYTES, m_ContextSize);
JS_SetGCParameter(m_rt, JSGC_MODE, JSGC_MODE_INCREMENTAL);		JS_SetGCParameter(m_cx, JSGC_MODE, JSGC_MODE_INCREMENTAL);

// The whole heap-growth mechanism seems to work only for non-incremental GCs.		// The whole heap-growth mechanism seems to work only for non-incremental GCs.
// We disable it to make it more clear if full GCs happen triggered by this JSAPI internal mechanism.		// We disable it to make it more clear if full GCs happen triggered by this JSAPI internal mechanism.
JS_SetGCParameter(m_rt, JSGC_DYNAMIC_HEAP_GROWTH, false);		JS_SetGCParameter(m_cx, JSGC_DYNAMIC_HEAP_GROWTH, false);

JS_SetErrorReporter(m_rt, ScriptException::ErrorReporter);

m_cx = JS_NewContext(m_rt, STACK_CHUNK_SIZE);		JS_SetOffthreadIonCompilationEnabled(m_cx, true);
ENSURE(m_cx); // TODO: error handling

JS_SetOffthreadIonCompilationEnabled(m_rt, true);

// For GC debugging:		// For GC debugging:
// JS_SetGCZeal(m_cx, 2, JS_DEFAULT_ZEAL_FREQ);		// JS_SetGCZeal(m_cx, 2, JS_DEFAULT_ZEAL_FREQ);

JS_SetContextPrivate(m_cx, nullptr);		JS_SetContextPrivate(m_cx, nullptr);

JS_SetGlobalJitCompilerOption(m_rt, JSJITCOMPILER_ION_ENABLE, 1);		JS_SetGlobalJitCompilerOption(m_cx, JSJITCOMPILER_ION_ENABLE, 1);
JS_SetGlobalJitCompilerOption(m_rt, JSJITCOMPILER_BASELINE_ENABLE, 1);		JS_SetGlobalJitCompilerOption(m_cx, JSJITCOMPILER_BASELINE_ENABLE, 1);

JS::RuntimeOptionsRef(m_cx)		JS::ContextOptionsRef(m_cx)
.setExtraWarnings(true)		.setExtraWarnings(true)
.setWerror(false)		.setWerror(false)
.setStrictMode(true);		.setStrictMode(true);

ScriptEngine::GetSingleton().RegisterContext(m_cx);		ScriptEngine::GetSingleton().RegisterContext(m_cx);
}		}

ScriptContext::~ScriptContext()		ScriptContext::~ScriptContext()
{		{
ENSURE(ScriptEngine::IsInitialised() && "The ScriptEngine must be active (initialized and not yet shut down) when destroying a ScriptContext!");		ENSURE(ScriptEngine::IsInitialised() && "The ScriptEngine must be active (initialized and not yet shut down) when destroying a ScriptContext!");

JS_DestroyContext(m_cx);		JS_DestroyContext(m_cx);
JS_DestroyRuntime(m_rt);

ScriptEngine::GetSingleton().UnRegisterContext(m_cx);		ScriptEngine::GetSingleton().UnRegisterContext(m_cx);
}		}

void ScriptContext::RegisterCompartment(JSCompartment* cmpt)		void ScriptContext::RegisterCompartment(JSCompartment* cmpt)
{		{
ENSURE(cmpt);		ENSURE(cmpt);
m_Compartments.push_back(cmpt);		m_Compartments.push_back(cmpt);
}		}

void ScriptContext::UnRegisterCompartment(JSCompartment* cmpt)		void ScriptContext::UnRegisterCompartment(JSCompartment* cmpt)
{		{
m_Compartments.remove(cmpt);		m_Compartments.remove(cmpt);
}		}

#define GC_DEBUG_PRINT 0		#define GC_DEBUG_PRINT 0
void ScriptContext::MaybeIncrementalGC(double delay)		void ScriptContext::MaybeIncrementalGC(double delay)
{		{
PROFILE2("MaybeIncrementalGC");		PROFILE2("MaybeIncrementalGC");

if (JS::IsIncrementalGCEnabled(m_rt))		if (JS::IsIncrementalGCEnabled(m_cx))
{		{
// The idea is to get the heap size after a completed GC and trigger the next GC when the heap size has		// The idea is to get the heap size after a completed GC and trigger the next GC when the heap size has
// reached m_LastGCBytes + X.		// reached m_LastGCBytes + X.
// In practice it doesn't quite work like that. When the incremental marking is completed, the sweeping kicks in.		// In practice it doesn't quite work like that. When the incremental marking is completed, the sweeping kicks in.
// The sweeping actually frees memory and it does this in a background thread (if JS_USE_HELPER_THREADS is set).		// The sweeping actually frees memory and it does this in a background thread (if JS_USE_HELPER_THREADS is set).
// While the sweeping is happening we already run scripts again and produce new garbage.		// While the sweeping is happening we already run scripts again and produce new garbage.

const int GCSliceTimeBudget = 30; // Milliseconds an incremental slice is allowed to run		const int GCSliceTimeBudget = 30; // Milliseconds an incremental slice is allowed to run

// Have a minimum time in seconds to wait between GC slices and before starting a new GC to distribute the GC		// Have a minimum time in seconds to wait between GC slices and before starting a new GC to distribute the GC
// load and to hopefully make it unnoticeable for the player. This value should be high enough to distribute		// load and to hopefully make it unnoticeable for the player. This value should be high enough to distribute
// the load well enough and low enough to make sure we don't run out of memory before we can start with the		// the load well enough and low enough to make sure we don't run out of memory before we can start with the
// sweeping.		// sweeping.
if (timer_Time() - m_LastGCCheck < delay)		if (timer_Time() - m_LastGCCheck < delay)
return;		return;

m_LastGCCheck = timer_Time();		m_LastGCCheck = timer_Time();

int gcBytes = JS_GetGCParameter(m_rt, JSGC_BYTES);		int gcBytes = JS_GetGCParameter(m_cx, JSGC_BYTES);

#if GC_DEBUG_PRINT		#if GC_DEBUG_PRINT
std::cout << "gcBytes: " << gcBytes / 1024 << " KB" << std::endl;		std::cout << "gcBytes: " << gcBytes / 1024 << " KB" << std::endl;
#endif		#endif

if (m_LastGCBytes > gcBytes \|\| m_LastGCBytes == 0)		if (m_LastGCBytes > gcBytes \|\| m_LastGCBytes == 0)
{		{
#if GC_DEBUG_PRINT		#if GC_DEBUG_PRINT
printf("Setting m_LastGCBytes: %d KB \n", gcBytes / 1024);		printf("Setting m_LastGCBytes: %d KB \n", gcBytes / 1024);
#endif		#endif
m_LastGCBytes = gcBytes;		m_LastGCBytes = gcBytes;
}		}

// Run an additional incremental GC slice if the currently running incremental GC isn't over yet		// Run an additional incremental GC slice if the currently running incremental GC isn't over yet
// ... or		// ... or
// start a new incremental GC if the JS heap size has grown enough for a GC to make sense		// start a new incremental GC if the JS heap size has grown enough for a GC to make sense
if (JS::IsIncrementalGCInProgress(m_rt) \|\| (gcBytes - m_LastGCBytes > m_HeapGrowthBytesGCTrigger))		if (JS::IsIncrementalGCInProgress(m_cx) \|\| (gcBytes - m_LastGCBytes > m_HeapGrowthBytesGCTrigger))
{		{
#if GC_DEBUG_PRINT		#if GC_DEBUG_PRINT
if (JS::IsIncrementalGCInProgress(m_rt))		if (JS::IsIncrementalGCInProgress(m_cx))
printf("An incremental GC cycle is in progress. \n");		printf("An incremental GC cycle is in progress. \n");
else		else
printf("GC needed because JSGC_BYTES - m_LastGCBytes > m_HeapGrowthBytesGCTrigger \n"		printf("GC needed because JSGC_BYTES - m_LastGCBytes > m_HeapGrowthBytesGCTrigger \n"
" JSGC_BYTES: %d KB \n m_LastGCBytes: %d KB \n m_HeapGrowthBytesGCTrigger: %d KB \n",		" JSGC_BYTES: %d KB \n m_LastGCBytes: %d KB \n m_HeapGrowthBytesGCTrigger: %d KB \n",
gcBytes / 1024,		gcBytes / 1024,
m_LastGCBytes / 1024,		m_LastGCBytes / 1024,
m_HeapGrowthBytesGCTrigger / 1024);		m_HeapGrowthBytesGCTrigger / 1024);
#endif		#endif

// A hack to make sure we never exceed the context size because we can't collect the memory		// A hack to make sure we never exceed the context size because we can't collect the memory
// fast enough.		// fast enough.
if (gcBytes > m_ContextSize / 2)		if (gcBytes > m_ContextSize / 2)
{		{
if (JS::IsIncrementalGCInProgress(m_rt))		if (JS::IsIncrementalGCInProgress(m_cx))
{		{
#if GC_DEBUG_PRINT		#if GC_DEBUG_PRINT
printf("Finishing incremental GC because gcBytes > m_ContextSize / 2. \n");		printf("Finishing incremental GC because gcBytes > m_ContextSize / 2. \n");
#endif		#endif
PrepareCompartmentsForIncrementalGC();		PrepareCompartmentsForIncrementalGC();
JS::FinishIncrementalGC(m_rt, JS::gcreason::REFRESH_FRAME);		JS::FinishIncrementalGC(m_cx, JS::gcreason::REFRESH_FRAME);
}		}
else		else
{		{
if (gcBytes > m_ContextSize * 0.75)		if (gcBytes > m_ContextSize * 0.75)
{		{
ShrinkingGC();		ShrinkingGC();
#if GC_DEBUG_PRINT		#if GC_DEBUG_PRINT
printf("Running shrinking GC because gcBytes > m_ContextSize * 0.75. \n");		printf("Running shrinking GC because gcBytes > m_ContextSize * 0.75. \n");
#endif		#endif
}		}
else		else
{		{
#if GC_DEBUG_PRINT		#if GC_DEBUG_PRINT
printf("Running full GC because gcBytes > m_ContextSize / 2. \n");		printf("Running full GC because gcBytes > m_ContextSize / 2. \n");
#endif		#endif
JS_GC(m_rt);		JS_GC(m_cx);
}		}
}		}
}		}
else		else
{		{
#if GC_DEBUG_PRINT		#if GC_DEBUG_PRINT
if (!JS::IsIncrementalGCInProgress(m_rt))		if (!JS::IsIncrementalGCInProgress(m_cx))
printf("Starting incremental GC \n");		printf("Starting incremental GC \n");
else		else
printf("Running incremental GC slice \n");		printf("Running incremental GC slice \n");
#endif		#endif
PrepareCompartmentsForIncrementalGC();		PrepareCompartmentsForIncrementalGC();
if (!JS::IsIncrementalGCInProgress(m_rt))		if (!JS::IsIncrementalGCInProgress(m_cx))
JS::StartIncrementalGC(m_rt, GC_NORMAL, JS::gcreason::REFRESH_FRAME, GCSliceTimeBudget);		JS::StartIncrementalGC(m_cx, GC_NORMAL, JS::gcreason::REFRESH_FRAME, GCSliceTimeBudget);
else		else
JS::IncrementalGCSlice(m_rt, JS::gcreason::REFRESH_FRAME, GCSliceTimeBudget);		JS::IncrementalGCSlice(m_cx, JS::gcreason::REFRESH_FRAME, GCSliceTimeBudget);
}		}
m_LastGCBytes = gcBytes;		m_LastGCBytes = gcBytes;
}		}
}		}
}		}

void ScriptContext::ShrinkingGC()		void ScriptContext::ShrinkingGC()
{		{
JS_SetGCParameter(m_rt, JSGC_MODE, JSGC_MODE_COMPARTMENT);		JS_SetGCParameter(m_cx, JSGC_MODE, JSGC_MODE_ZONE);
JS::PrepareForFullGC(m_rt);		JS::PrepareForFullGC(m_cx);
JS::GCForReason(m_rt, GC_SHRINK, JS::gcreason::REFRESH_FRAME);		JS::GCForReason(m_cx, GC_SHRINK, JS::gcreason::REFRESH_FRAME);
JS_SetGCParameter(m_rt, JSGC_MODE, JSGC_MODE_INCREMENTAL);		JS_SetGCParameter(m_cx, JSGC_MODE, JSGC_MODE_INCREMENTAL);
}		}

void ScriptContext::PrepareCompartmentsForIncrementalGC() const		void ScriptContext::PrepareCompartmentsForIncrementalGC() const
{		{
for (JSCompartment* const& cmpt : m_Compartments)		for (JSCompartment* const& cmpt : m_Compartments)
JS::PrepareZoneForGC(js::GetCompartmentZone(cmpt));		JS::PrepareZoneForGC(js::GetCompartmentZone(cmpt));
}		}