OSchip
/
llvm-project
mirror of https://github.com/THU-DSP-LAB/llvm-project.git
13
0
Fork 6
Code Issues Packages Projects Releases Wiki Activity
llvm-project/lldb/source/DataFormatters/ValueObjectPrinter.cpp

808 lines
27 KiB
C++
Raw Blame History

//===-- ValueObjectPrinter.cpp --------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "lldb/DataFormatters/ValueObjectPrinter.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/DataFormatters/DataVisualization.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Target/Language.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/Stream.h"
using namespace lldb;
using namespace lldb_private;
ValueObjectPrinter::ValueObjectPrinter(ValueObject *valobj, Stream *s) {
if (valobj) {
DumpValueObjectOptions options(*valobj);
Init(valobj, s, options, m_options.m_max_ptr_depth, 0, nullptr);
} else {
DumpValueObjectOptions options;
Init(valobj, s, options, m_options.m_max_ptr_depth, 0, nullptr);
}
}
ValueObjectPrinter::ValueObjectPrinter(ValueObject *valobj, Stream *s,
const DumpValueObjectOptions &options) {
Init(valobj, s, options, m_options.m_max_ptr_depth, 0, nullptr);
}
ValueObjectPrinter::ValueObjectPrinter(
ValueObject *valobj, Stream *s, const DumpValueObjectOptions &options,
const DumpValueObjectOptions::PointerDepth &ptr_depth, uint32_t curr_depth,
InstancePointersSetSP printed_instance_pointers) {
Init(valobj, s, options, ptr_depth, curr_depth, printed_instance_pointers);
}
void ValueObjectPrinter::Init(
ValueObject *valobj, Stream *s, const DumpValueObjectOptions &options,
const DumpValueObjectOptions::PointerDepth &ptr_depth, uint32_t curr_depth,
InstancePointersSetSP printed_instance_pointers) {
m_orig_valobj = valobj;
m_valobj = nullptr;
m_stream = s;
m_options = options;
m_ptr_depth = ptr_depth;
m_curr_depth = curr_depth;
assert(m_orig_valobj && "cannot print a NULL ValueObject");
assert(m_stream && "cannot print to a NULL Stream");
m_should_print = eLazyBoolCalculate;
m_is_nil = eLazyBoolCalculate;
m_is_uninit = eLazyBoolCalculate;
m_is_ptr = eLazyBoolCalculate;
m_is_ref = eLazyBoolCalculate;
m_is_aggregate = eLazyBoolCalculate;
m_is_instance_ptr = eLazyBoolCalculate;
m_summary_formatter = {nullptr, false};
m_value.assign("");
m_summary.assign("");
m_error.assign("");
m_val_summary_ok = false;
m_printed_instance_pointers =
printed_instance_pointers
? printed_instance_pointers
: InstancePointersSetSP(new InstancePointersSet());
}
bool ValueObjectPrinter::PrintValueObject() {
if (!GetMostSpecializedValue() || m_valobj == nullptr)
return false;
if (ShouldPrintValueObject()) {
PrintLocationIfNeeded();
m_stream->Indent();
PrintDecl();
}
bool value_printed = false;
bool summary_printed = false;
m_val_summary_ok =
PrintValueAndSummaryIfNeeded(value_printed, summary_printed);
if (m_val_summary_ok)
PrintChildrenIfNeeded(value_printed, summary_printed);
else
m_stream->EOL();
return true;
}
bool ValueObjectPrinter::GetMostSpecializedValue() {
if (m_valobj)
return true;
bool update_success = m_orig_valobj->UpdateValueIfNeeded(true);
if (!update_success) {
m_valobj = m_orig_valobj;
} else {
if (m_orig_valobj->IsDynamic()) {
if (m_options.m_use_dynamic == eNoDynamicValues) {
ValueObject *static_value = m_orig_valobj->GetStaticValue().get();
if (static_value)
m_valobj = static_value;
else
m_valobj = m_orig_valobj;
} else
m_valobj = m_orig_valobj;
} else {
if (m_options.m_use_dynamic != eNoDynamicValues) {
ValueObject *dynamic_value =
m_orig_valobj->GetDynamicValue(m_options.m_use_dynamic).get();
if (dynamic_value)
m_valobj = dynamic_value;
else
m_valobj = m_orig_valobj;
} else
m_valobj = m_orig_valobj;
}
if (m_valobj->IsSynthetic()) {
if (!m_options.m_use_synthetic) {
ValueObject *non_synthetic = m_valobj->GetNonSyntheticValue().get();
if (non_synthetic)
m_valobj = non_synthetic;
}
} else {
if (m_options.m_use_synthetic) {
ValueObject *synthetic = m_valobj->GetSyntheticValue().get();
if (synthetic)
m_valobj = synthetic;
}
}
}
m_compiler_type = m_valobj->GetCompilerType();
m_type_flags = m_compiler_type.GetTypeInfo();
return true;
}
const char *ValueObjectPrinter::GetDescriptionForDisplay() {
const char *str = m_valobj->GetObjectDescription();
if (!str)
str = m_valobj->GetSummaryAsCString();
if (!str)
str = m_valobj->GetValueAsCString();
return str;
}
const char *ValueObjectPrinter::GetRootNameForDisplay() {
const char *root_valobj_name = m_options.m_root_valobj_name.empty()
? m_valobj->GetName().AsCString()
: m_options.m_root_valobj_name.c_str();
return root_valobj_name ? root_valobj_name : "";
}
bool ValueObjectPrinter::ShouldPrintValueObject() {
if (m_should_print == eLazyBoolCalculate)
m_should_print =
(!m_options.m_flat_output || m_type_flags.Test(eTypeHasValue))
? eLazyBoolYes
: eLazyBoolNo;
return m_should_print == eLazyBoolYes;
}
bool ValueObjectPrinter::IsNil() {
if (m_is_nil == eLazyBoolCalculate)
m_is_nil = m_valobj->IsNilReference() ? eLazyBoolYes : eLazyBoolNo;
return m_is_nil == eLazyBoolYes;
}
bool ValueObjectPrinter::IsUninitialized() {
if (m_is_uninit == eLazyBoolCalculate)
m_is_uninit =
m_valobj->IsUninitializedReference() ? eLazyBoolYes : eLazyBoolNo;
return m_is_uninit == eLazyBoolYes;
}
bool ValueObjectPrinter::IsPtr() {
if (m_is_ptr == eLazyBoolCalculate)
m_is_ptr = m_type_flags.Test(eTypeIsPointer) ? eLazyBoolYes : eLazyBoolNo;
return m_is_ptr == eLazyBoolYes;
}
bool ValueObjectPrinter::IsRef() {
if (m_is_ref == eLazyBoolCalculate)
m_is_ref = m_type_flags.Test(eTypeIsReference) ? eLazyBoolYes : eLazyBoolNo;
return m_is_ref == eLazyBoolYes;
}
bool ValueObjectPrinter::IsAggregate() {
if (m_is_aggregate == eLazyBoolCalculate)
m_is_aggregate =
m_type_flags.Test(eTypeHasChildren) ? eLazyBoolYes : eLazyBoolNo;
return m_is_aggregate == eLazyBoolYes;
}
bool ValueObjectPrinter::IsInstancePointer() {
// you need to do this check on the value's clang type
if (m_is_instance_ptr == eLazyBoolCalculate)
m_is_instance_ptr = (m_valobj->GetValue().GetCompilerType().GetTypeInfo() &
eTypeInstanceIsPointer) != 0
? eLazyBoolYes
: eLazyBoolNo;
if ((eLazyBoolYes == m_is_instance_ptr) && m_valobj->IsBaseClass())
m_is_instance_ptr = eLazyBoolNo;
return m_is_instance_ptr == eLazyBoolYes;
}
bool ValueObjectPrinter::PrintLocationIfNeeded() {
if (m_options.m_show_location) {
m_stream->Printf("%s: ", m_valobj->GetLocationAsCString());
return true;
}
return false;
}
void ValueObjectPrinter::PrintDecl() {
bool show_type = true;
// if we are at the root-level and been asked to hide the root's type, then
// hide it
if (m_curr_depth == 0 && m_options.m_hide_root_type)
show_type = false;
else
// otherwise decide according to the usual rules (asked to show types -
// always at the root level)
show_type = m_options.m_show_types ||
(m_curr_depth == 0 && !m_options.m_flat_output);
StreamString typeName;
// always show the type at the root level if it is invalid
if (show_type) {
// Some ValueObjects don't have types (like registers sets). Only print the
// type if there is one to print
ConstString type_name;
if (m_compiler_type.IsValid()) {
type_name = m_options.m_use_type_display_name
? m_valobj->GetDisplayTypeName()
: m_valobj->GetQualifiedTypeName();
} else {
// only show an invalid type name if the user explicitly triggered
// show_type
if (m_options.m_show_types)
type_name = ConstString("<invalid type>");
}
if (type_name) {
std::string type_name_str(type_name.GetCString());
if (m_options.m_hide_pointer_value) {
for (auto iter = type_name_str.find(" *"); iter != std::string::npos;
iter = type_name_str.find(" *")) {
type_name_str.erase(iter, 2);
}
}
typeName << type_name_str.c_str();
}
}
StreamString varName;
if (!m_options.m_hide_name) {
if (m_options.m_flat_output)
m_valobj->GetExpressionPath(varName);
else
varName << GetRootNameForDisplay();
}
bool decl_printed = false;
if (!m_options.m_decl_printing_helper) {
// if the user didn't give us a custom helper, pick one based upon the
// language, either the one that this printer is bound to, or the preferred
// one for the ValueObject
lldb::LanguageType lang_type =
(m_options.m_varformat_language == lldb::eLanguageTypeUnknown)
? m_valobj->GetPreferredDisplayLanguage()
: m_options.m_varformat_language;
if (Language *lang_plugin = Language::FindPlugin(lang_type)) {
m_options.m_decl_printing_helper = lang_plugin->GetDeclPrintingHelper();
}
}
if (m_options.m_decl_printing_helper) {
ConstString type_name_cstr(typeName.GetString());
ConstString var_name_cstr(varName.GetString());
StreamString dest_stream;
if (m_options.m_decl_printing_helper(type_name_cstr, var_name_cstr,
m_options, dest_stream)) {
decl_printed = true;
m_stream->PutCString(dest_stream.GetString());
}
}
// if the helper failed, or there is none, do a default thing
if (!decl_printed) {
if (!typeName.Empty())
m_stream->Printf("(%s) ", typeName.GetData());
if (!varName.Empty())
m_stream->Printf("%s =", varName.GetData());
else if (!m_options.m_hide_name)
m_stream->Printf(" =");
}
}
bool ValueObjectPrinter::CheckScopeIfNeeded() {
if (m_options.m_scope_already_checked)
return true;
return m_valobj->IsInScope();
}
TypeSummaryImpl *ValueObjectPrinter::GetSummaryFormatter(bool null_if_omitted) {
if (!m_summary_formatter.second) {
TypeSummaryImpl *entry = m_options.m_summary_sp
? m_options.m_summary_sp.get()
: m_valobj->GetSummaryFormat().get();
if (m_options.m_omit_summary_depth > 0)
entry = nullptr;
m_summary_formatter.first = entry;
m_summary_formatter.second = true;
}
if (m_options.m_omit_summary_depth > 0 && null_if_omitted)
return nullptr;
return m_summary_formatter.first;
}
static bool IsPointerValue(const CompilerType &type) {
Flags type_flags(type.GetTypeInfo());
if (type_flags.AnySet(eTypeInstanceIsPointer | eTypeIsPointer))
return type_flags.AllClear(eTypeIsBuiltIn);
return false;
}
void ValueObjectPrinter::GetValueSummaryError(std::string &value,
std::string &summary,
std::string &error) {
lldb::Format format = m_options.m_format;
// if I am printing synthetized elements, apply the format to those elements
// only
if (m_options.m_pointer_as_array)
m_valobj->GetValueAsCString(lldb::eFormatDefault, value);
else if (format != eFormatDefault && format != m_valobj->GetFormat())
m_valobj->GetValueAsCString(format, value);
else {
const char *val_cstr = m_valobj->GetValueAsCString();
if (val_cstr)
value.assign(val_cstr);
}
const char *err_cstr = m_valobj->GetError().AsCString();
if (err_cstr)
error.assign(err_cstr);
if (!ShouldPrintValueObject())
return;
if (IsNil()) {
lldb::LanguageType lang_type =
(m_options.m_varformat_language == lldb::eLanguageTypeUnknown)
? m_valobj->GetPreferredDisplayLanguage()
: m_options.m_varformat_language;
if (Language *lang_plugin = Language::FindPlugin(lang_type)) {
summary.assign(lang_plugin->GetNilReferenceSummaryString().str());
} else {
// We treat C as the fallback language rather than as a separate Language
// plugin.
summary.assign("NULL");
}
} else if (IsUninitialized()) {
summary.assign("<uninitialized>");
} else if (m_options.m_omit_summary_depth == 0) {
TypeSummaryImpl *entry = GetSummaryFormatter();
if (entry) {
m_valobj->GetSummaryAsCString(entry, summary,
m_options.m_varformat_language);
} else {
const char *sum_cstr =
m_valobj->GetSummaryAsCString(m_options.m_varformat_language);
if (sum_cstr)
summary.assign(sum_cstr);
}
}
}
bool ValueObjectPrinter::PrintValueAndSummaryIfNeeded(bool &value_printed,
bool &summary_printed) {
bool error_printed = false;
if (ShouldPrintValueObject()) {
if (!CheckScopeIfNeeded())
m_error.assign("out of scope");
if (m_error.empty()) {
GetValueSummaryError(m_value, m_summary, m_error);
}
if (m_error.size()) {
// we need to support scenarios in which it is actually fine for a value
// to have no type but - on the other hand - if we get an error *AND*
// have no type, we try to get out gracefully, since most often that
// combination means "could not resolve a type" and the default failure
// mode is quite ugly
if (!m_compiler_type.IsValid()) {
m_stream->Printf(" <could not resolve type>");
return false;
}
error_printed = true;
m_stream->Printf(" <%s>\n", m_error.c_str());
} else {
// Make sure we have a value and make sure the summary didn't specify
// that the value should not be printed - and do not print the value if
// this thing is nil (but show the value if the user passes a format
// explicitly)
TypeSummaryImpl *entry = GetSummaryFormatter();
const bool has_nil_or_uninitialized_summary =
(IsNil() || IsUninitialized()) && !m_summary.empty();
if (!has_nil_or_uninitialized_summary && !m_value.empty() &&
(entry == nullptr ||
(entry->DoesPrintValue(m_valobj) ||
m_options.m_format != eFormatDefault) ||
m_summary.empty()) &&
!m_options.m_hide_value) {
if (m_options.m_hide_pointer_value &&
IsPointerValue(m_valobj->GetCompilerType())) {
} else {
m_stream->Printf(" %s", m_value.c_str());
value_printed = true;
}
}
if (m_summary.size()) {
m_stream->Printf(" %s", m_summary.c_str());
summary_printed = true;
}
}
}
return !error_printed;
}
bool ValueObjectPrinter::PrintObjectDescriptionIfNeeded(bool value_printed,
bool summary_printed) {
if (ShouldPrintValueObject()) {
// let's avoid the overly verbose no description error for a nil thing
if (m_options.m_use_objc && !IsNil() && !IsUninitialized() &&
(!m_options.m_pointer_as_array)) {
if (!m_options.m_hide_value || !m_options.m_hide_name)
m_stream->Printf(" ");
const char *object_desc = nullptr;
if (value_printed || summary_printed)
object_desc = m_valobj->GetObjectDescription();
else
object_desc = GetDescriptionForDisplay();
if (object_desc && *object_desc) {
// If the description already ends with a \n don't add another one.
size_t object_end = strlen(object_desc) - 1;
if (object_desc[object_end] == '\n')
m_stream->Printf("%s", object_desc);
else
m_stream->Printf("%s\n", object_desc);
return true;
} else if (!value_printed && !summary_printed)
return true;
else
return false;
}
}
return true;
}
bool DumpValueObjectOptions::PointerDepth::CanAllowExpansion() const {
switch (m_mode) {
case Mode::Always:
case Mode::Default:
return m_count > 0;
case Mode::Never:
return false;
}
return false;
}
bool ValueObjectPrinter::ShouldPrintChildren(
bool is_failed_description,
DumpValueObjectOptions::PointerDepth &curr_ptr_depth) {
const bool is_ref = IsRef();
const bool is_ptr = IsPtr();
const bool is_uninit = IsUninitialized();
if (is_uninit)
return false;
// if the user has specified an element count, always print children as it is
// explicit user demand being honored
if (m_options.m_pointer_as_array)
return true;
TypeSummaryImpl *entry = GetSummaryFormatter();
if (m_options.m_use_objc)
return false;
if (is_failed_description || !HasReachedMaximumDepth()) {
// We will show children for all concrete types. We won't show pointer
// contents unless a pointer depth has been specified. We won't reference
// contents unless the reference is the root object (depth of zero).
// Use a new temporary pointer depth in case we override the current
// pointer depth below...
if (is_ptr || is_ref) {
// We have a pointer or reference whose value is an address. Make sure
// that address is not NULL
AddressType ptr_address_type;
if (m_valobj->GetPointerValue(&ptr_address_type) == 0)
return false;
const bool is_root_level = m_curr_depth == 0;
if (is_ref && is_root_level) {
// If this is the root object (depth is zero) that we are showing and
// it is a reference, and no pointer depth has been supplied print out
// what it references. Don't do this at deeper depths otherwise we can
// end up with infinite recursion...
return true;
}
return curr_ptr_depth.CanAllowExpansion();
}
return (!entry || entry->DoesPrintChildren(m_valobj) || m_summary.empty());
}
return false;
}
bool ValueObjectPrinter::ShouldExpandEmptyAggregates() {
TypeSummaryImpl *entry = GetSummaryFormatter();
if (!entry)
return true;
return entry->DoesPrintEmptyAggregates();
}
ValueObject *ValueObjectPrinter::GetValueObjectForChildrenGeneration() {
return m_valobj;
}
void ValueObjectPrinter::PrintChildrenPreamble() {
if (m_options.m_flat_output) {
if (ShouldPrintValueObject())
m_stream->EOL();
} else {
if (ShouldPrintValueObject())
m_stream->PutCString(IsRef() ? ": {\n" : " {\n");
m_stream->IndentMore();
}
}
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();
}
}
uint32_t ValueObjectPrinter::GetMaxNumChildrenToPrint(bool &print_dotdotdot) {
ValueObject *synth_m_valobj = GetValueObjectForChildrenGeneration();
if (m_options.m_pointer_as_array)
return m_options.m_pointer_as_array.m_element_count;
size_t num_children = synth_m_valobj->GetNumChildren();
print_dotdotdot = false;
if (num_children) {
const size_t max_num_children =
m_valobj->GetTargetSP()->GetMaximumNumberOfChildrenToDisplay();
if (num_children > max_num_children && !m_options.m_ignore_cap) {
print_dotdotdot = true;
return max_num_children;
}
}
return num_children;
}
void ValueObjectPrinter::PrintChildrenPostamble(bool print_dotdotdot) {
if (!m_options.m_flat_output) {
if (print_dotdotdot) {
m_valobj->GetTargetSP()
->GetDebugger()
.GetCommandInterpreter()
.ChildrenTruncated();
m_stream->Indent("...\n");
}
m_stream->IndentLess();
m_stream->Indent("}\n");
}
}
bool ValueObjectPrinter::ShouldPrintEmptyBrackets(bool value_printed,
bool summary_printed) {
ValueObject *synth_m_valobj = GetValueObjectForChildrenGeneration();
if (!IsAggregate())
return false;
if (!m_options.m_reveal_empty_aggregates) {
if (value_printed || summary_printed)
return false;
}
if (synth_m_valobj->MightHaveChildren())
return true;
if (m_val_summary_ok)
return false;
return true;
}
static constexpr size_t PhysicalIndexForLogicalIndex(size_t base, size_t stride,
size_t logical) {
return base + logical * stride;
}
ValueObjectSP ValueObjectPrinter::GenerateChild(ValueObject *synth_valobj,
size_t idx) {
if (m_options.m_pointer_as_array) {
// if generating pointer-as-array children, use GetSyntheticArrayMember
return synth_valobj->GetSyntheticArrayMember(
PhysicalIndexForLogicalIndex(
m_options.m_pointer_as_array.m_base_element,
m_options.m_pointer_as_array.m_stride, idx),
true);
} else {
// otherwise, do the usual thing
return synth_valobj->GetChildAtIndex(idx, true);
}
}
void ValueObjectPrinter::PrintChildren(
bool value_printed, bool summary_printed,
const DumpValueObjectOptions::PointerDepth &curr_ptr_depth) {
ValueObject *synth_m_valobj = GetValueObjectForChildrenGeneration();
bool print_dotdotdot = false;
size_t num_children = GetMaxNumChildrenToPrint(print_dotdotdot);
if (num_children) {
bool any_children_printed = false;
for (size_t idx = 0; idx < num_children; ++idx) {
if (ValueObjectSP child_sp = GenerateChild(synth_m_valobj, idx)) {
if (!any_children_printed) {
PrintChildrenPreamble();
any_children_printed = true;
}
PrintChild(child_sp, curr_ptr_depth);
}
}
if (any_children_printed)
PrintChildrenPostamble(print_dotdotdot);
else {
if (ShouldPrintEmptyBrackets(value_printed, summary_printed)) {
if (ShouldPrintValueObject())
m_stream->PutCString(" {}\n");
else
m_stream->EOL();
} else
m_stream->EOL();
}
} else if (ShouldPrintEmptyBrackets(value_printed, summary_printed)) {
// Aggregate, no children...
if (ShouldPrintValueObject()) {
// if it has a synthetic value, then don't print {}, the synthetic
// children are probably only being used to vend a value
if (m_valobj->DoesProvideSyntheticValue() ||
!ShouldExpandEmptyAggregates())
m_stream->PutCString("\n");
else
m_stream->PutCString(" {}\n");
}
} else {
if (ShouldPrintValueObject())
m_stream->EOL();
}
}
bool ValueObjectPrinter::PrintChildrenOneLiner(bool hide_names) {
if (!GetMostSpecializedValue() || m_valobj == nullptr)
return false;
ValueObject *synth_m_valobj = GetValueObjectForChildrenGeneration();
bool print_dotdotdot = false;
size_t num_children = GetMaxNumChildrenToPrint(print_dotdotdot);
if (num_children) {
m_stream->PutChar('(');
for (uint32_t idx = 0; idx < num_children; ++idx) {
lldb::ValueObjectSP child_sp(synth_m_valobj->GetChildAtIndex(idx, true));
if (child_sp)
child_sp = child_sp->GetQualifiedRepresentationIfAvailable(
m_options.m_use_dynamic, m_options.m_use_synthetic);
if (child_sp) {
if (idx)
m_stream->PutCString(", ");
if (!hide_names) {
const char *name = child_sp.get()->GetName().AsCString();
if (name && *name) {
m_stream->PutCString(name);
m_stream->PutCString(" = ");
}
}
child_sp->DumpPrintableRepresentation(
*m_stream, ValueObject::eValueObjectRepresentationStyleSummary,
m_options.m_format,
ValueObject::PrintableRepresentationSpecialCases::eDisable);
}
}
if (print_dotdotdot)
m_stream->PutCString(", ...)");
else
m_stream->PutChar(')');
}
return true;
}
void ValueObjectPrinter::PrintChildrenIfNeeded(bool value_printed,
bool summary_printed) {
// This flag controls whether we tried to display a description for this
// object and failed if that happens, we want to display the children if any.
bool is_failed_description =
!PrintObjectDescriptionIfNeeded(value_printed, summary_printed);
DumpValueObjectOptions::PointerDepth curr_ptr_depth = m_ptr_depth;
const bool print_children =
ShouldPrintChildren(is_failed_description, curr_ptr_depth);
const bool print_oneline =
(curr_ptr_depth.CanAllowExpansion() || m_options.m_show_types ||
!m_options.m_allow_oneliner_mode || m_options.m_flat_output ||
(m_options.m_pointer_as_array) || m_options.m_show_location)
? false
: DataVisualization::ShouldPrintAsOneLiner(*m_valobj);
if (print_children && IsInstancePointer()) {
uint64_t instance_ptr_value = m_valobj->GetValueAsUnsigned(0);
if (m_printed_instance_pointers->count(instance_ptr_value)) {
// We already printed this instance-is-pointer thing, so don't expand it.
m_stream->PutCString(" {...}\n");
return;
} else {
// Remember this guy for future reference.
m_printed_instance_pointers->emplace(instance_ptr_value);
}
}
if (print_children) {
if (print_oneline) {
m_stream->PutChar(' ');
PrintChildrenOneLiner(false);
m_stream->EOL();
} else
PrintChildren(value_printed, summary_printed, curr_ptr_depth);
} else if (HasReachedMaximumDepth() && IsAggregate() &&
ShouldPrintValueObject()) {
m_stream->PutCString("{...}\n");
// The maximum child depth has been reached. If `m_max_depth` is the default
// (i.e. the user has _not_ customized it), then lldb presents a warning to
// the user. The warning tells the user that the limit has been reached, but
// more importantly tells them how to expand the limit if desired.
if (m_options.m_max_depth_is_default)
m_valobj->GetTargetSP()
->GetDebugger()
.GetCommandInterpreter()
.SetReachedMaximumDepth();
} else
m_stream->EOL();
}
bool ValueObjectPrinter::HasReachedMaximumDepth() {
return m_curr_depth >= m_options.m_max_depth;
}
Reference in New Issue View Git Blame Copy Permalink