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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /js/src/vm/InvalidatingFuse.h
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+/* -*- 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/. */
+
+#ifndef vm_InvalidatingFuse_h
+#define vm_InvalidatingFuse_h
+
+#include "gc/Barrier.h"
+#include "gc/SweepingAPI.h"
+#include "vm/GuardFuse.h"
+#include "vm/JSScript.h"
+
+namespace js {
+
+// [SMDOC] Invalidating Fuses
+//
+// An invalidating fuse will invalidate a set of dependent IonScripts when the
+// fuse is popped. In this way Ion can choose to ignore fuse guarded
+// possibilities when doing compilation.
+class InvalidatingFuse : public GuardFuse {
+ public:
+ // Register a script's IonScript as having a dependency on this fuse.
+ virtual bool addFuseDependency(JSContext* cx, Handle<JSScript*> script) = 0;
+};
+
+// [SMDOC] Invalidating Runtime Fuses
+//
+// A specialized sublass for handling runtime wide fuses. This provides a
+// version of addFuseDependency which records scripts into sets associated with
+// their home zone, and invalidates all sets across all zones linked to this
+// specific fuse.
+class InvalidatingRuntimeFuse : public InvalidatingFuse {
+ public:
+ virtual bool addFuseDependency(JSContext* cx,
+ Handle<JSScript*> script) override;
+ virtual void popFuse(JSContext* cx) override;
+};
+
+// A (weak) set of scripts which are dependent on an associated fuse.
+//
+// These are typically stored in a vector at the moment, due to the low number
+// of invalidating fuses, and so the associated fuse is stored along with the
+// set.
+//
+// Because it uses JS::WeakCache, GC tracing is taken care of without any need
+// for tracing in this class.
+class DependentScriptSet {
+ public:
+ DependentScriptSet(JSContext* cx, InvalidatingFuse* fuse);
+
+ InvalidatingFuse* associatedFuse;
+ bool addScriptForFuse(InvalidatingFuse* fuse, Handle<JSScript*> script);
+ void invalidateForFuse(JSContext* cx, InvalidatingFuse* fuse);
+
+ private:
+ using WeakScriptSet = GCHashSet<WeakHeapPtr<JSScript*>,
+ StableCellHasher<WeakHeapPtr<JSScript*>>,
+ js::SystemAllocPolicy>;
+ js::WeakCache<WeakScriptSet> weakScripts;
+};
+
+} // namespace js
+
+#endif // vm_InvalidatingFuse_h