tor-browser

CompileWrappers.cpp (7500B)

---

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* 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 "jit/CompileWrappers.h"

#include "gc/Heap.h"
#include "gc/Zone.h"
#include "jit/Ion.h"
#include "jit/JitRuntime.h"
#include "vm/Realm.h"

using namespace js;
using namespace js::jit;

JSRuntime* CompileRuntime::runtime() {
 return reinterpret_cast<JSRuntime*>(this);
}

/* static */
CompileRuntime* CompileRuntime::get(JSRuntime* rt) {
 return reinterpret_cast<CompileRuntime*>(rt);
}

#ifdef JS_GC_ZEAL
const uint32_t* CompileRuntime::addressOfGCZealModeBits() {
 return runtime()->gc.addressOfZealModeBits();
}
#endif

const JitRuntime* CompileRuntime::jitRuntime() {
 return runtime()->jitRuntime();
}

const GeckoProfilerRuntime& CompileRuntime::geckoProfiler() {
 return runtime()->geckoProfiler();
}

bool CompileRuntime::hadOutOfMemory() { return runtime()->hadOutOfMemory; }

bool CompileRuntime::profilingScripts() { return runtime()->profilingScripts; }

const JSAtomState& CompileRuntime::names() { return *runtime()->commonNames; }

const PropertyName* CompileRuntime::emptyString() {
 return runtime()->emptyString;
}

const StaticStrings& CompileRuntime::staticStrings() {
 return *runtime()->staticStrings;
}

const WellKnownSymbols& CompileRuntime::wellKnownSymbols() {
 return *runtime()->wellKnownSymbols;
}

const JSClass* CompileRuntime::maybeWindowProxyClass() {
 return runtime()->maybeWindowProxyClass();
}

const void* CompileRuntime::mainContextPtr() {
 return runtime()->mainContextFromAnyThread();
}

const void* CompileRuntime::addressOfJitActivation() {
 return runtime()->mainContextFromAnyThread()->addressOfJitActivation();
}

const void* CompileRuntime::addressOfJitStackLimit() {
 return runtime()->mainContextFromAnyThread()->addressOfJitStackLimit();
}

const void* CompileRuntime::addressOfInterruptBits() {
 return runtime()->mainContextFromAnyThread()->addressOfInterruptBits();
}

const void* CompileRuntime::addressOfRealm() {
 return runtime()->mainContextFromAnyThread()->addressOfRealm();
}

const void* CompileRuntime::addressOfZone() {
 return runtime()->mainContextFromAnyThread()->addressOfZone();
}

const void* CompileRuntime::addressOfMegamorphicCache() {
 return &runtime()->caches().megamorphicCache;
}

const void* CompileRuntime::addressOfMegamorphicSetPropCache() {
 return runtime()->caches().megamorphicSetPropCache.get();
}

const void* CompileRuntime::addressOfStringToAtomCache() {
 return &runtime()->caches().stringToAtomCache;
}

const void* CompileRuntime::addressOfLastBufferedWholeCell() {
 return runtime()->gc.addressOfLastBufferedWholeCell();
}

const void* CompileRuntime::addressOfRuntimeFuse(
   RuntimeFuses::FuseIndex index) {
 // We're merely accessing the address of the fuse here, and so we don't need
 // the MainThreadData check here.
 return runtime()->runtimeFuses.refNoCheck().getFuseByIndex(index)->fuseRef();
}

bool CompileRuntime::runtimeFuseIntact(RuntimeFuses::FuseIndex index) {
 // Note: This accesses the bit; this would be unsafe off-thread, however
 // this should only be accessed by CompileInfo in its constructor on main
 // thread and so should be safe.
 //
 // (This value is also checked by ref() rather than skipped like the address
 // call above.)
 return runtime()->runtimeFuses.ref().getFuseByIndex(index)->intact();
}

const DOMCallbacks* CompileRuntime::DOMcallbacks() {
 return runtime()->DOMcallbacks;
}

bool CompileRuntime::runtimeMatches(JSRuntime* rt) { return rt == runtime(); }

Zone* CompileZone::zone() { return reinterpret_cast<Zone*>(this); }

/* static */
CompileZone* CompileZone::get(Zone* zone) {
 return reinterpret_cast<CompileZone*>(zone);
}

CompileRuntime* CompileZone::runtime() {
 return CompileRuntime::get(zone()->runtimeFromAnyThread());
}

bool CompileZone::isAtomsZone() { return zone()->isAtomsZone(); }

#ifdef DEBUG
const void* CompileRuntime::addressOfIonBailAfterCounter() {
 return runtime()->jitRuntime()->addressOfIonBailAfterCounter();
}
#endif

const uint32_t* CompileZone::addressOfNeedsIncrementalBarrier() {
 // Cast away relaxed atomic wrapper for JIT access to barrier state.
 const mozilla::Atomic<uint32_t, mozilla::Relaxed>* ptr =
     zone()->addressOfNeedsIncrementalBarrier();
 return reinterpret_cast<const uint32_t*>(ptr);
}

uint32_t* CompileZone::addressOfTenuredAllocCount() {
 return zone()->addressOfTenuredAllocCount();
}

gc::FreeSpan** CompileZone::addressOfFreeList(gc::AllocKind allocKind) {
 return zone()->arenas.addressOfFreeList(allocKind);
}

bool CompileZone::allocNurseryObjects() {
 return zone()->allocNurseryObjects();
}

bool CompileZone::allocNurseryStrings() {
 return zone()->allocNurseryStrings();
}

bool CompileZone::allocNurseryBigInts() {
 return zone()->allocNurseryBigInts();
}

void* CompileZone::addressOfNurseryPosition() {
 return zone()->runtimeFromAnyThread()->gc.addressOfNurseryPosition();
}

void* CompileZone::addressOfNurseryAllocatedSites() {
 JSRuntime* rt = zone()->runtimeFromAnyThread();
 return rt->gc.addressOfNurseryAllocatedSites();
}

void* CompileZone::jitZone() { return zone()->jitZone(); }

bool CompileZone::canNurseryAllocateStrings() {
 return zone()->allocNurseryStrings();
}

bool CompileZone::canNurseryAllocateBigInts() {
 return zone()->allocNurseryBigInts();
}

gc::AllocSite* CompileZone::catchAllAllocSite(JS::TraceKind traceKind,
                                             gc::CatchAllAllocSite siteKind) {
 if (siteKind == gc::CatchAllAllocSite::Optimized) {
   return zone()->optimizedAllocSite();
 }
 return zone()->unknownAllocSite(traceKind);
}

gc::AllocSite* CompileZone::tenuringAllocSite() {
 return zone()->tenuringAllocSite();
}

JS::Realm* CompileRealm::realm() { return reinterpret_cast<JS::Realm*>(this); }

/* static */
CompileRealm* CompileRealm::get(JS::Realm* realm) {
 return reinterpret_cast<CompileRealm*>(realm);
}

CompileZone* CompileRealm::zone() { return CompileZone::get(realm()->zone()); }

CompileRuntime* CompileRealm::runtime() {
 return CompileRuntime::get(realm()->runtimeFromAnyThread());
}

const mozilla::non_crypto::XorShift128PlusRNG*
CompileRealm::addressOfRandomNumberGenerator() {
 return realm()->addressOfRandomNumberGenerator();
}

const GlobalObject* CompileRealm::maybeGlobal() {
 // This uses unsafeUnbarrieredMaybeGlobal() so as not to trigger the read
 // barrier on the global from off thread.  This is safe because we
 // abort Ion compilation when we GC.
 return realm()->unsafeUnbarrieredMaybeGlobal();
}

const uint32_t* CompileRealm::addressOfGlobalWriteBarriered() {
 return &realm()->globalWriteBarriered;
}

bool CompileZone::hasRealmWithAllocMetadataBuilder() {
 return zone()->hasRealmWithAllocMetadataBuilder();
}

JitCompileOptions::JitCompileOptions()
   : profilerSlowAssertionsEnabled_(false),
     offThreadCompilationAvailable_(false) {}

JitCompileOptions::JitCompileOptions(JSContext* cx) {
 profilerSlowAssertionsEnabled_ =
     cx->runtime()->geckoProfiler().enabled() &&
     cx->runtime()->geckoProfiler().slowAssertionsEnabled();
 offThreadCompilationAvailable_ = OffThreadCompilationAvailable(cx);
#ifdef DEBUG
 ionBailAfterEnabled_ = cx->runtime()->jitRuntime()->ionBailAfterEnabled();
#endif
}