bool
HeapSnapshot::saveNode(const protobuf::Node& node, NodeIdSet& edgeReferents)
{
// NB: de-duplicated string properties must be read back and interned in the
// same order here as they are written and serialized in
// `CoreDumpWriter::writeNode` or else indices in references to already
// serialized strings will be off.
if (NS_WARN_IF(!node.has_id()))
return false;
NodeId id = node.id();
// NodeIds are derived from pointers (at most 48 bits) and we rely on them
// fitting into JS numbers (IEEE 754 doubles, can precisely store 53 bit
// integers) despite storing them on disk as 64 bit integers.
if (NS_WARN_IF(!JS::Value::isNumberRepresentable(id)))
return false;
// Should only deserialize each node once.
if (NS_WARN_IF(nodes.has(id)))
return false;
if (NS_WARN_IF(!JS::ubi::Uint32IsValidCoarseType(node.coarsetype())))
return false;
auto coarseType = JS::ubi::Uint32ToCoarseType(node.coarsetype());
Maybe<StringOrRef> typeNameOrRef = GET_STRING_OR_REF_WITH_PROP_NAMES(node, typename_, typenameref);
auto typeName = getOrInternString<char16_t>(internedTwoByteStrings, typeNameOrRef);
if (NS_WARN_IF(!typeName))
return false;
if (NS_WARN_IF(!node.has_size()))
return false;
uint64_t size = node.size();
auto edgesLength = node.edges_size();
DeserializedNode::EdgeVector edges;
if (NS_WARN_IF(!edges.reserve(edgesLength)))
return false;
for (decltype(edgesLength) i = 0; i < edgesLength; i++) {
auto& protoEdge = node.edges(i);
if (NS_WARN_IF(!protoEdge.has_referent()))
return false;
NodeId referent = protoEdge.referent();
if (NS_WARN_IF(!edgeReferents.put(referent)))
return false;
const char16_t* edgeName = nullptr;
if (protoEdge.EdgeNameOrRef_case() != protobuf::Edge::EDGENAMEORREF_NOT_SET) {
Maybe<StringOrRef> edgeNameOrRef = GET_STRING_OR_REF(protoEdge, name);
edgeName = getOrInternString<char16_t>(internedTwoByteStrings, edgeNameOrRef);
if (NS_WARN_IF(!edgeName))
return false;
}
edges.infallibleAppend(DeserializedEdge(referent, edgeName));
}
Maybe<StackFrameId> allocationStack;
if (node.has_allocationstack()) {
StackFrameId id = 0;
if (NS_WARN_IF(!saveStackFrame(node.allocationstack(), id)))
return false;
allocationStack.emplace(id);
}
MOZ_ASSERT(allocationStack.isSome() == node.has_allocationstack());
const char* jsObjectClassName = nullptr;
if (node.JSObjectClassNameOrRef_case() != protobuf::Node::JSOBJECTCLASSNAMEORREF_NOT_SET) {
Maybe<StringOrRef> clsNameOrRef = GET_STRING_OR_REF(node, jsobjectclassname);
jsObjectClassName = getOrInternString<char>(internedOneByteStrings, clsNameOrRef);
if (NS_WARN_IF(!jsObjectClassName))
return false;
}
const char* scriptFilename = nullptr;
if (node.ScriptFilenameOrRef_case() != protobuf::Node::SCRIPTFILENAMEORREF_NOT_SET) {
Maybe<StringOrRef> scriptFilenameOrRef = GET_STRING_OR_REF(node, scriptfilename);
scriptFilename = getOrInternString<char>(internedOneByteStrings, scriptFilenameOrRef);
if (NS_WARN_IF(!scriptFilename))
return false;
}
if (NS_WARN_IF(!nodes.putNew(id, DeserializedNode(id, coarseType, typeName,
size, Move(edges),
allocationStack,
jsObjectClassName,
scriptFilename, *this))))
{
return false;
};
return true;
}
bool
HeapSnapshot::saveNode(const protobuf::Node& node)
{
if (!node.has_id())
return false;
NodeId id = node.id();
// Should only deserialize each node once.
if (nodes.has(id))
return false;
if (!JS::ubi::Uint32IsValidCoarseType(node.coarsetype()))
return false;
auto coarseType = JS::ubi::Uint32ToCoarseType(node.coarsetype());
if (!node.has_typename_())
return false;
auto duplicatedTypeName = reinterpret_cast<const char16_t*>(
node.typename_().data());
auto length = node.typename_().length() / sizeof(char16_t);
auto typeName = borrowUniqueString(duplicatedTypeName, length);
if (!typeName)
return false;
if (!node.has_size())
return false;
uint64_t size = node.size();
auto edgesLength = node.edges_size();
DeserializedNode::EdgeVector edges;
if (!edges.reserve(edgesLength))
return false;
for (decltype(edgesLength) i = 0; i < edgesLength; i++) {
DeserializedEdge edge;
if (!edge.init(node.edges(i), *this))
return false;
edges.infallibleAppend(Move(edge));
}
Maybe<StackFrameId> allocationStack;
if (node.has_allocationstack()) {
StackFrameId id = 0;
if (!saveStackFrame(node.allocationstack(), id))
return false;
allocationStack.emplace(id);
}
MOZ_ASSERT(allocationStack.isSome() == node.has_allocationstack());
UniquePtr<char[]> jsObjectClassName;
if (node.has_jsobjectclassname()) {
auto length = node.jsobjectclassname().length();
jsObjectClassName.reset(static_cast<char*>(malloc(length + 1)));
if (!jsObjectClassName)
return false;
strncpy(jsObjectClassName.get(), node.jsobjectclassname().data(),
length);
jsObjectClassName.get()[length] = '\0';
}
return nodes.putNew(id, DeserializedNode(id, coarseType, typeName, size,
Move(edges), allocationStack,
Move(jsObjectClassName),
*this));
}