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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /js/src/vm/StencilCache.cpp | |
parent | Initial commit. (diff) | |
download | firefox-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>
Diffstat (limited to '')
-rw-r--r-- | js/src/vm/StencilCache.cpp | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/js/src/vm/StencilCache.cpp b/js/src/vm/StencilCache.cpp new file mode 100644 index 0000000000..1bf138c63e --- /dev/null +++ b/js/src/vm/StencilCache.cpp @@ -0,0 +1,69 @@ +/* -*- 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 "vm/StencilCache.h" + +#include "frontend/CompilationStencil.h" +#include "js/experimental/JSStencil.h" +#include "vm/MutexIDs.h" + +js::StencilCache::StencilCache() + : cache(js::mutexid::StencilCache), enabled(false) {} + +js::StencilCache::AccessKey js::StencilCache::isSourceCached( + ScriptSource* src) { + if (!enabled) { + return cache.noAccess(); + } + + AccessKey lock(cache.lock()); + if (!enabled) { + // As we checked the flag before taking the lock, we have to check again to + // avoid races on the cache manipulation. + return cache.noAccess(); + } + if (!lock->watched.has(src)) { + // If the source does not have any cached function, and we do not expect to + // cache any delazification in the future, then skip any cache handling. + return cache.noAccess(); + } + return lock; +} + +bool js::StencilCache::startCaching(RefPtr<ScriptSource>&& src) { + auto guard = cache.lock(); + if (!guard->watched.putNew(std::move(src))) { + return false; + } + enabled = true; + return true; +} + +js::frontend::CompilationStencil* js::StencilCache::lookup( + AccessKey& guard, const StencilContext& key) { + auto ptr = guard->functions.lookup(key); + if (!ptr) { + return nullptr; + } + + return ptr->value().get(); +} + +bool js::StencilCache::putNew(AccessKey& guard, const StencilContext& key, + js::frontend::CompilationStencil* value) { + return guard->functions.putNew(key, value); +} + +// Important: This function should not be called within a scope checking for +// isSourceCached, as this would cause a dead-lock. +void js::StencilCache::clearAndDisable() { + auto guard = cache.lock(); + guard->functions.clearAndCompact(); + guard->watched.clearAndCompact(); + enabled = false; +} + +/* static */ js::DelazificationCache js::DelazificationCache::singleton; |