bool
HeapSnapshot::init(JSContext* cx, const uint8_t* buffer, uint32_t size)
{
if (!nodes.init() || !frames.init())
return false;
ArrayInputStream stream(buffer, size);
GzipInputStream gzipStream(&stream);
// First is the metadata.
protobuf::Metadata metadata;
if (!parseMessage(gzipStream, metadata))
return false;
if (metadata.has_timestamp())
timestamp.emplace(metadata.timestamp());
// Next is the root node.
protobuf::Node root;
if (!parseMessage(gzipStream, root))
return false;
// Although the id is optional in the protobuf format for future proofing, we
// can't currently do anything without it.
if (NS_WARN_IF(!root.has_id()))
return false;
rootId = root.id();
// The set of all node ids we've found edges pointing to.
NodeIdSet edgeReferents(cx);
if (NS_WARN_IF(!edgeReferents.init()))
return false;
if (NS_WARN_IF(!saveNode(root, edgeReferents)))
return false;
// Finally, the rest of the nodes in the core dump.
while (StreamHasData(gzipStream)) {
protobuf::Node node;
if (!parseMessage(gzipStream, node))
return false;
if (NS_WARN_IF(!saveNode(node, edgeReferents)))
return false;
}
// Check the set of node ids referred to by edges we found and ensure that we
// have the node corresponding to each id. If we don't have all of them, it is
// unsafe to perform analyses of this heap snapshot.
for (auto range = edgeReferents.all(); !range.empty(); range.popFront()) {
if (NS_WARN_IF(!nodes.has(range.front())))
return false;
}
return true;
}
bool
HeapSnapshot::init(const uint8_t* buffer, uint32_t size)
{
if (!nodes.init() || !frames.init() || !strings.init())
return false;
ArrayInputStream stream(buffer, size);
GzipInputStream gzipStream(&stream);
// First is the metadata.
protobuf::Metadata metadata;
if (!parseMessage(gzipStream, metadata))
return false;
if (metadata.has_timestamp())
timestamp.emplace(metadata.timestamp());
// Next is the root node.
protobuf::Node root;
if (!parseMessage(gzipStream, root))
return false;
// Although the id is optional in the protobuf format for future proofing, we
// can't currently do anything without it.
if (NS_WARN_IF(!root.has_id()))
return false;
rootId = root.id();
if (NS_WARN_IF(!saveNode(root)))
return false;
// Finally, the rest of the nodes in the core dump.
while (StreamHasData(gzipStream)) {
protobuf::Node node;
if (!parseMessage(gzipStream, node))
return false;
if (NS_WARN_IF(!saveNode(node)))
return false;
}
return true;
}