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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
#ifndef jit_CompilationDependencyTracker_h
#define jit_CompilationDependencyTracker_h
#include "mozilla/Vector.h"
#include "jstypes.h"
#include "NamespaceImports.h"
struct JSContext;
namespace js::jit {
class MIRGenerator;
struct CompilationDependency {
enum class Type { GetIterator, EmulatesUndefined, Limit };
Type type;
CompilationDependency(Type type) : type(type) {}
virtual bool operator==(CompilationDependency& other) = 0;
// Return true iff this dependency still holds. May only be called on main
// thread.
virtual bool checkDependency(JSContext* cx) = 0;
[[nodiscard]] virtual bool registerDependency(JSContext* cx,
HandleScript script) = 0;
virtual UniquePtr<CompilationDependency> clone() = 0;
virtual ~CompilationDependency() = default;
};
// For a given Warp compilation keep track of the dependencies this compilation
// is depending on. These dependencies will be checked on main thread during
// link time, causing abandonment of a compilation if they no longer hold.
struct CompilationDependencyTracker {
mozilla::Vector<UniquePtr<CompilationDependency>, 8, SystemAllocPolicy>
dependencies;
[[nodiscard]] bool addDependency(CompilationDependency& dep) {
// Ensure we don't add duplicates. We expect this list to be short,
// and so iteration is preferred over a more costly hashset.
MOZ_ASSERT(dependencies.length() <= 32);
for (auto& existingDep : dependencies) {
if (dep == *existingDep) {
return true;
}
}
auto clone = dep.clone();
if (!clone) {
return false;
}
return dependencies.append(std::move(clone));
}
// Check all dependencies. May only be checked on main thread.
bool checkDependencies(JSContext* cx) {
for (auto& dep : dependencies) {
if (!dep->checkDependency(cx)) {
return false;
}
}
return true;
}
void reset() { dependencies.clearAndFree(); }
};
} // namespace js::jit
#endif /* jit_CompilationDependencyTracker_h */