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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
commit | 43a97878ce14b72f0981164f87f2e35e14151312 (patch) | |
tree | 620249daf56c0258faa40cbdcf9cfba06de2a846 /js/src/vm/Activation.cpp | |
parent | Initial commit. (diff) | |
download | firefox-upstream.tar.xz firefox-upstream.zip |
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/vm/Activation.cpp')
-rw-r--r-- | js/src/vm/Activation.cpp | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/js/src/vm/Activation.cpp b/js/src/vm/Activation.cpp new file mode 100644 index 0000000000..19b383c9c5 --- /dev/null +++ b/js/src/vm/Activation.cpp @@ -0,0 +1,84 @@ +/* -*- 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/Activation-inl.h" + +#include "mozilla/Assertions.h" // MOZ_ASSERT + +#include "gc/GC.h" // js::gc::AutoSuppressGC +#include "jit/CalleeToken.h" // js::jit::CalleeToken{IsFunction,To{Function,Script}} +#include "js/RootingAPI.h" // JS::Rooted +#include "js/Value.h" // JS::Value +#include "vm/JSContext.h" // JSContext, js::TlsContext +#include "vm/Stack.h" // js::InterpreterFrame + +#include "vm/Compartment-inl.h" // JS::Compartment::wrap + +using namespace js; + +using JS::ObjectOrNullValue; +using JS::Rooted; +using JS::UndefinedValue; +using JS::Value; + +Value ActivationEntryMonitor::asyncStack(JSContext* cx) { + Rooted<Value> stack(cx, ObjectOrNullValue(cx->asyncStackForNewActivations())); + if (!cx->compartment()->wrap(cx, &stack)) { + cx->clearPendingException(); + return UndefinedValue(); + } + return stack; +} + +void ActivationEntryMonitor::init(JSContext* cx, InterpreterFrame* entryFrame) { + // The InterpreterFrame is not yet part of an Activation, so it won't + // be traced if we trigger GC here. Suppress GC to avoid this. + gc::AutoSuppressGC suppressGC(cx); + Rooted<Value> stack(cx, asyncStack(cx)); + const char* asyncCause = cx->asyncCauseForNewActivations; + if (entryFrame->isFunctionFrame()) { + entryMonitor_->Entry(cx, &entryFrame->callee(), stack, asyncCause); + } else { + entryMonitor_->Entry(cx, entryFrame->script(), stack, asyncCause); + } +} + +void ActivationEntryMonitor::init(JSContext* cx, jit::CalleeToken entryToken) { + // The CalleeToken is not traced at this point and we also don't want + // a GC to discard the code we're about to enter, so we suppress GC. + gc::AutoSuppressGC suppressGC(cx); + RootedValue stack(cx, asyncStack(cx)); + const char* asyncCause = cx->asyncCauseForNewActivations; + if (jit::CalleeTokenIsFunction(entryToken)) { + entryMonitor_->Entry(cx_, jit::CalleeTokenToFunction(entryToken), stack, + asyncCause); + } else { + entryMonitor_->Entry(cx_, jit::CalleeTokenToScript(entryToken), stack, + asyncCause); + } +} + +void Activation::registerProfiling() { + MOZ_ASSERT(isProfiling()); + cx_->profilingActivation_ = this; +} + +void Activation::unregisterProfiling() { + MOZ_ASSERT(isProfiling()); + MOZ_ASSERT(cx_->profilingActivation_ == this); + cx_->profilingActivation_ = prevProfiling_; +} + +ActivationIterator::ActivationIterator(JSContext* cx) + : activation_(cx->activation_) { + MOZ_ASSERT(cx == TlsContext.get()); +} + +ActivationIterator& ActivationIterator::operator++() { + MOZ_ASSERT(activation_); + activation_ = activation_->prev(); + return *this; +} |