mirror of
https://github.com/oven-sh/bun
synced 2026-02-14 04:49:06 +00:00
31ce87f306
FINDINGS: - Individual yoga tests pass (19/19 tests) - Multiple test files together cause ASAN heap-use-after-free in YGNodeFree - Root cause: YGNodeFree assumes child/parent nodes are valid, but GC can free them in arbitrary order - Crash occurs in facebook::yoga::Node::setOwner() when YGNodeFree tries to clean up children CHANGES: - Enhanced JSYogaNode with WriteBarrier children array for GC references (mirrors React Native _reactSubviews) - Fixed clone() method to avoid double YGNode creation that caused ownership conflicts - TEMPORARY: Skip YGNodeFree during JS finalizer to prevent crashes (causes memory leaks) - Moved yoga tests to test/js/bun/yoga/ directory STATUS: All tests now pass, but memory leaks need to be addressed with proper YGNode lifecycle management 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
92 lines
2.2 KiB
C++
92 lines
2.2 KiB
C++
#include "YogaNodeImpl.h"
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#include "JSYogaNode.h"
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#include "JSYogaConfig.h"
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#include "JSYogaNodeOwner.h"
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#include <yoga/Yoga.h>
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#include <wtf/HashSet.h>
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#include <wtf/Lock.h>
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namespace Bun {
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Ref<YogaNodeImpl> YogaNodeImpl::create(YGConfigRef config)
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{
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return adoptRef(*new YogaNodeImpl(config));
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}
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YogaNodeImpl::YogaNodeImpl(YGConfigRef config)
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{
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if (config) {
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m_yogaNode = YGNodeNewWithConfig(config);
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} else {
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m_yogaNode = YGNodeNew();
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}
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// Store this C++ wrapper in the Yoga node's context
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YGNodeSetContext(m_yogaNode, this);
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}
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YogaNodeImpl::~YogaNodeImpl()
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{
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// Don't call YGNodeFree here - let JS finalizer handle it to control timing
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// This avoids double-free issues during GC when nodes may be freed in arbitrary order
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m_yogaNode = nullptr;
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}
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void YogaNodeImpl::setJSWrapper(JSYogaNode* wrapper)
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{
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// Only increment ref count if we don't already have a wrapper
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// This prevents ref count leaks if setJSWrapper is called multiple times
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if (!m_wrapper) {
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// Increment ref count for the weak handle context
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this->ref();
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}
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// Create weak reference with our JS owner
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m_wrapper = JSC::Weak<JSYogaNode>(wrapper, &jsYogaNodeOwner(), this);
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}
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void YogaNodeImpl::clearJSWrapper()
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{
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m_wrapper.clear();
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}
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void YogaNodeImpl::clearJSWrapperWithoutDeref()
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{
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// Clear weak reference without deref - used by JS destructor
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// when WeakHandleOwner::finalize will handle the deref
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m_wrapper.clear();
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}
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JSYogaNode* YogaNodeImpl::jsWrapper() const
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{
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return m_wrapper.get();
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}
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JSYogaConfig* YogaNodeImpl::jsConfig() const
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{
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// Access config through JS wrapper's WriteBarrier - this is GC-safe
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if (auto* jsWrapper = m_wrapper.get()) {
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return jsCast<JSYogaConfig*>(jsWrapper->m_config.get());
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}
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return nullptr;
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}
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YogaNodeImpl* YogaNodeImpl::fromYGNode(YGNodeRef nodeRef)
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{
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if (!nodeRef) return nullptr;
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return static_cast<YogaNodeImpl*>(YGNodeGetContext(nodeRef));
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}
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void YogaNodeImpl::replaceYogaNode(YGNodeRef newNode)
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{
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// Don't access old YGNode - it might be freed already
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// Let Yoga handle cleanup of the old node
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m_yogaNode = newNode;
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if (newNode) {
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YGNodeSetContext(newNode, this);
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}
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}
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} // namespace Bun
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