protobuf::StackFrame* getProtobufStackFrame(JS::ubi::StackFrame& frame) {
MOZ_ASSERT(frame,
"null frames should be represented as the lack of a serialized "
"stack frame");
auto id = frame.identifier();
auto protobufStackFrame = MakeUnique<protobuf::StackFrame>();
if (!protobufStackFrame)
return nullptr;
if (framesAlreadySerialized.has(id)) {
protobufStackFrame->set_ref(id);
return protobufStackFrame.release();
}
auto data = MakeUnique<protobuf::StackFrame_Data>();
if (!data)
return nullptr;
data->set_id(id);
data->set_line(frame.line());
data->set_column(frame.column());
data->set_issystem(frame.isSystem());
data->set_isselfhosted(frame.isSelfHosted());
auto source = MakeUnique<std::string>(frame.sourceLength() * sizeof(char16_t),
'\0');
if (!source)
return nullptr;
auto buf = const_cast<char16_t*>(reinterpret_cast<const char16_t*>(source->data()));
frame.source(RangedPtr<char16_t>(buf, frame.sourceLength()),
frame.sourceLength());
data->set_allocated_source(source.release());
auto nameLength = frame.functionDisplayNameLength();
if (nameLength > 0) {
auto functionDisplayName = MakeUnique<std::string>(nameLength * sizeof(char16_t),
'\0');
if (!functionDisplayName)
return nullptr;
auto buf = const_cast<char16_t*>(reinterpret_cast<const char16_t*>(functionDisplayName->data()));
frame.functionDisplayName(RangedPtr<char16_t>(buf, nameLength), nameLength);
data->set_allocated_functiondisplayname(functionDisplayName.release());
}
auto parent = frame.parent();
if (parent) {
auto protobufParent = getProtobufStackFrame(parent);
if (!protobufParent)
return nullptr;
data->set_allocated_parent(protobufParent);
}
protobufStackFrame->set_allocated_data(data.release());
if (!framesAlreadySerialized.put(id))
return nullptr;
return protobufStackFrame.release();
}
protobuf::StackFrame* getProtobufStackFrame(JS::ubi::StackFrame& frame,
size_t depth = 1) {
// NB: de-duplicated string properties must be written in the same order
// here as they are read in `HeapSnapshot::saveStackFrame` or else indices
// in references to already serialized strings will be off.
MOZ_ASSERT(frame,
"null frames should be represented as the lack of a serialized "
"stack frame");
auto id = frame.identifier();
auto protobufStackFrame = MakeUnique<protobuf::StackFrame>();
if (!protobufStackFrame)
return nullptr;
if (framesAlreadySerialized.has(id)) {
protobufStackFrame->set_ref(id);
return protobufStackFrame.release();
}
auto data = MakeUnique<protobuf::StackFrame_Data>();
if (!data)
return nullptr;
data->set_id(id);
data->set_line(frame.line());
data->set_column(frame.column());
data->set_issystem(frame.isSystem());
data->set_isselfhosted(frame.isSelfHosted());
auto dupeSource = TwoByteString::from(frame.source());
if (!attachTwoByteString(dupeSource,
[&] (std::string* source) { data->set_allocated_source(source); },
[&] (uint64_t ref) { data->set_sourceref(ref); }))
{
return nullptr;
}
auto dupeName = TwoByteString::from(frame.functionDisplayName());
if (dupeName.isNonNull()) {
if (!attachTwoByteString(dupeName,
[&] (std::string* name) { data->set_allocated_functiondisplayname(name); },
[&] (uint64_t ref) { data->set_functiondisplaynameref(ref); }))
{
return nullptr;
}
}
auto parent = frame.parent();
if (parent && depth < HeapSnapshot::MAX_STACK_DEPTH) {
auto protobufParent = getProtobufStackFrame(parent, depth + 1);
if (!protobufParent)
return nullptr;
data->set_allocated_parent(protobufParent);
}
protobufStackFrame->set_allocated_data(data.release());
if (!framesAlreadySerialized.put(id))
return nullptr;
return protobufStackFrame.release();
}