void ValueObjectPrinter::PrintChild(
ValueObjectSP child_sp,
const DumpValueObjectOptions::PointerDepth &curr_ptr_depth) {
const uint32_t consumed_depth = (!m_options.m_pointer_as_array) ? 1 : 0;
const bool does_consume_ptr_depth =
((IsPtr() && !m_options.m_pointer_as_array) || IsRef());
DumpValueObjectOptions child_options(m_options);
child_options.SetFormat(m_options.m_format)
.SetSummary()
.SetRootValueObjectName();
child_options.SetScopeChecked(true)
.SetHideName(m_options.m_hide_name)
.SetHideValue(m_options.m_hide_value)
.SetOmitSummaryDepth(child_options.m_omit_summary_depth > 1
? child_options.m_omit_summary_depth -
consumed_depth
: 0)
.SetElementCount(0);
if (child_sp.get()) {
ValueObjectPrinter child_printer(
child_sp.get(), m_stream, child_options,
does_consume_ptr_depth ? --curr_ptr_depth : curr_ptr_depth,
m_curr_depth + consumed_depth, m_printed_instance_pointers);
child_printer.PrintValueObject();
}
}
// this function abstracts away the layout and mode details of a libc++ string
// and returns the address of the data and the size ready for callers to consume
static bool
ExtractLibcxxStringInfo (ValueObject& valobj,
ValueObjectSP &location_sp,
uint64_t& size)
{
ValueObjectSP D(valobj.GetChildAtIndexPath({0,0,0,0}));
if (!D)
return false;
ValueObjectSP layout_decider(D->GetChildAtIndexPath({0,0}));
// this child should exist
if (!layout_decider)
return false;
ConstString g_data_name("__data_");
ConstString g_size_name("__size_");
bool short_mode = false; // this means the string is in short-mode and the data is stored inline
LibcxxStringLayoutMode layout = (layout_decider->GetName() == g_data_name) ? eLibcxxStringLayoutModeDSC : eLibcxxStringLayoutModeCSD;
uint64_t size_mode_value = 0;
if (layout == eLibcxxStringLayoutModeDSC)
{
ValueObjectSP size_mode(D->GetChildAtIndexPath({1,1,0}));
if (!size_mode)
return false;
if (size_mode->GetName() != g_size_name)
{
// we are hitting the padding structure, move along
size_mode = D->GetChildAtIndexPath({1,1,1});
if (!size_mode)
return false;
}
size_mode_value = (size_mode->GetValueAsUnsigned(0));
short_mode = ((size_mode_value & 0x80) == 0);
}
else
{
ValueObjectSP size_mode(D->GetChildAtIndexPath({1,0,0}));
if (!size_mode)
return false;
size_mode_value = (size_mode->GetValueAsUnsigned(0));
short_mode = ((size_mode_value & 1) == 0);
}
if (short_mode)
{
ValueObjectSP s(D->GetChildAtIndex(1, true));
if (!s)
return false;
location_sp = s->GetChildAtIndex((layout == eLibcxxStringLayoutModeDSC) ? 0 : 1, true);
size = (layout == eLibcxxStringLayoutModeDSC) ? size_mode_value : ((size_mode_value >> 1) % 256);
return (location_sp.get() != nullptr);
}
else
{
void
ValueObjectPrinter::PrintChild (ValueObjectSP child_sp,
const DumpValueObjectOptions::PointerDepth& curr_ptr_depth)
{
DumpValueObjectOptions child_options(m_options);
child_options.SetFormat(m_options.m_format).SetSummary().SetRootValueObjectName();
child_options.SetScopeChecked(true).SetHideName(m_options.m_hide_name).SetHideValue(m_options.m_hide_value)
.SetOmitSummaryDepth(child_options.m_omit_summary_depth > 1 ? child_options.m_omit_summary_depth - 1 : 0);
if (child_sp.get())
{
ValueObjectPrinter child_printer(child_sp.get(),
m_stream,
child_options,
(IsPtr() || IsRef()) ? --curr_ptr_depth : curr_ptr_depth,
m_curr_depth + 1);
child_printer.PrintValueObject();
}
}
