0e4c482124
My apologies for the large patch. With the exception of ConstString.h itself it was entirely produced by sed. ConstString has exactly one const char * data member, so passing a ConstString by reference is not any more efficient than copying it by value. In both cases a single pointer is passed. But passing it by value makes it harder to accidentally return the address of a local object. (This fixes rdar://problem/48640859 for the Apple folks) Differential Revision: https://reviews.llvm.org/D59030 llvm-svn: 355553
229 lines
8.1 KiB
C++
229 lines
8.1 KiB
C++
//===-- ValueObjectChild.cpp ------------------------------------*- C++ -*-===//
|
|
//
|
|
// 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/Core/ValueObjectChild.h"
|
|
|
|
#include "lldb/Core/Value.h"
|
|
#include "lldb/Symbol/CompilerType.h"
|
|
#include "lldb/Target/ExecutionContext.h"
|
|
#include "lldb/Target/Process.h"
|
|
#include "lldb/Utility/Flags.h"
|
|
#include "lldb/Utility/Scalar.h"
|
|
#include "lldb/Utility/Status.h"
|
|
#include "lldb/lldb-forward.h"
|
|
|
|
#include <functional>
|
|
#include <memory>
|
|
#include <vector>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
using namespace lldb_private;
|
|
|
|
ValueObjectChild::ValueObjectChild(
|
|
ValueObject &parent, const CompilerType &compiler_type,
|
|
ConstString name, uint64_t byte_size, int32_t byte_offset,
|
|
uint32_t bitfield_bit_size, uint32_t bitfield_bit_offset,
|
|
bool is_base_class, bool is_deref_of_parent,
|
|
AddressType child_ptr_or_ref_addr_type, uint64_t language_flags)
|
|
: ValueObject(parent), m_compiler_type(compiler_type),
|
|
m_byte_size(byte_size), m_byte_offset(byte_offset),
|
|
m_bitfield_bit_size(bitfield_bit_size),
|
|
m_bitfield_bit_offset(bitfield_bit_offset),
|
|
m_is_base_class(is_base_class), m_is_deref_of_parent(is_deref_of_parent),
|
|
m_can_update_with_invalid_exe_ctx() {
|
|
m_name = name;
|
|
SetAddressTypeOfChildren(child_ptr_or_ref_addr_type);
|
|
SetLanguageFlags(language_flags);
|
|
}
|
|
|
|
ValueObjectChild::~ValueObjectChild() {}
|
|
|
|
lldb::ValueType ValueObjectChild::GetValueType() const {
|
|
return m_parent->GetValueType();
|
|
}
|
|
|
|
size_t ValueObjectChild::CalculateNumChildren(uint32_t max) {
|
|
ExecutionContext exe_ctx(GetExecutionContextRef());
|
|
auto children_count = GetCompilerType().GetNumChildren(true, &exe_ctx);
|
|
return children_count <= max ? children_count : max;
|
|
}
|
|
|
|
static void AdjustForBitfieldness(ConstString &name,
|
|
uint8_t bitfield_bit_size) {
|
|
if (name && bitfield_bit_size) {
|
|
const char *compiler_type_name = name.AsCString();
|
|
if (compiler_type_name) {
|
|
std::vector<char> bitfield_type_name(strlen(compiler_type_name) + 32, 0);
|
|
::snprintf(&bitfield_type_name.front(), bitfield_type_name.size(),
|
|
"%s:%u", compiler_type_name, bitfield_bit_size);
|
|
name.SetCString(&bitfield_type_name.front());
|
|
}
|
|
}
|
|
}
|
|
|
|
ConstString ValueObjectChild::GetTypeName() {
|
|
if (m_type_name.IsEmpty()) {
|
|
m_type_name = GetCompilerType().GetConstTypeName();
|
|
AdjustForBitfieldness(m_type_name, m_bitfield_bit_size);
|
|
}
|
|
return m_type_name;
|
|
}
|
|
|
|
ConstString ValueObjectChild::GetQualifiedTypeName() {
|
|
ConstString qualified_name = GetCompilerType().GetConstTypeName();
|
|
AdjustForBitfieldness(qualified_name, m_bitfield_bit_size);
|
|
return qualified_name;
|
|
}
|
|
|
|
ConstString ValueObjectChild::GetDisplayTypeName() {
|
|
ConstString display_name = GetCompilerType().GetDisplayTypeName();
|
|
AdjustForBitfieldness(display_name, m_bitfield_bit_size);
|
|
return display_name;
|
|
}
|
|
|
|
LazyBool ValueObjectChild::CanUpdateWithInvalidExecutionContext() {
|
|
if (m_can_update_with_invalid_exe_ctx.hasValue())
|
|
return m_can_update_with_invalid_exe_ctx.getValue();
|
|
if (m_parent) {
|
|
ValueObject *opinionated_parent =
|
|
m_parent->FollowParentChain([](ValueObject *valobj) -> bool {
|
|
return (valobj->CanUpdateWithInvalidExecutionContext() ==
|
|
eLazyBoolCalculate);
|
|
});
|
|
if (opinionated_parent)
|
|
return (m_can_update_with_invalid_exe_ctx =
|
|
opinionated_parent->CanUpdateWithInvalidExecutionContext())
|
|
.getValue();
|
|
}
|
|
return (m_can_update_with_invalid_exe_ctx =
|
|
this->ValueObject::CanUpdateWithInvalidExecutionContext())
|
|
.getValue();
|
|
}
|
|
|
|
bool ValueObjectChild::UpdateValue() {
|
|
m_error.Clear();
|
|
SetValueIsValid(false);
|
|
ValueObject *parent = m_parent;
|
|
if (parent) {
|
|
if (parent->UpdateValueIfNeeded(false)) {
|
|
m_value.SetCompilerType(GetCompilerType());
|
|
|
|
CompilerType parent_type(parent->GetCompilerType());
|
|
// Copy the parent scalar value and the scalar value type
|
|
m_value.GetScalar() = parent->GetValue().GetScalar();
|
|
Value::ValueType value_type = parent->GetValue().GetValueType();
|
|
m_value.SetValueType(value_type);
|
|
|
|
Flags parent_type_flags(parent_type.GetTypeInfo());
|
|
const bool is_instance_ptr_base =
|
|
((m_is_base_class) &&
|
|
(parent_type_flags.AnySet(lldb::eTypeInstanceIsPointer)));
|
|
|
|
if (parent->GetCompilerType().ShouldTreatScalarValueAsAddress()) {
|
|
lldb::addr_t addr = parent->GetPointerValue();
|
|
m_value.GetScalar() = addr;
|
|
|
|
if (addr == LLDB_INVALID_ADDRESS) {
|
|
m_error.SetErrorString("parent address is invalid.");
|
|
} else if (addr == 0) {
|
|
m_error.SetErrorString("parent is NULL");
|
|
} else {
|
|
m_value.GetScalar() += m_byte_offset;
|
|
AddressType addr_type = parent->GetAddressTypeOfChildren();
|
|
|
|
switch (addr_type) {
|
|
case eAddressTypeFile: {
|
|
lldb::ProcessSP process_sp(GetProcessSP());
|
|
if (process_sp && process_sp->IsAlive())
|
|
m_value.SetValueType(Value::eValueTypeLoadAddress);
|
|
else
|
|
m_value.SetValueType(Value::eValueTypeFileAddress);
|
|
} break;
|
|
case eAddressTypeLoad:
|
|
m_value.SetValueType(is_instance_ptr_base
|
|
? Value::eValueTypeScalar
|
|
: Value::eValueTypeLoadAddress);
|
|
break;
|
|
case eAddressTypeHost:
|
|
m_value.SetValueType(Value::eValueTypeHostAddress);
|
|
break;
|
|
case eAddressTypeInvalid:
|
|
// TODO: does this make sense?
|
|
m_value.SetValueType(Value::eValueTypeScalar);
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
switch (value_type) {
|
|
case Value::eValueTypeLoadAddress:
|
|
case Value::eValueTypeFileAddress:
|
|
case Value::eValueTypeHostAddress: {
|
|
lldb::addr_t addr =
|
|
m_value.GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
|
|
if (addr == LLDB_INVALID_ADDRESS) {
|
|
m_error.SetErrorString("parent address is invalid.");
|
|
} else if (addr == 0) {
|
|
m_error.SetErrorString("parent is NULL");
|
|
} else {
|
|
// Set this object's scalar value to the address of its value by
|
|
// adding its byte offset to the parent address
|
|
m_value.GetScalar() += GetByteOffset();
|
|
}
|
|
} break;
|
|
|
|
case Value::eValueTypeScalar:
|
|
// try to extract the child value from the parent's scalar value
|
|
{
|
|
Scalar scalar(m_value.GetScalar());
|
|
if (m_bitfield_bit_size)
|
|
scalar.ExtractBitfield(m_bitfield_bit_size,
|
|
m_bitfield_bit_offset);
|
|
else
|
|
scalar.ExtractBitfield(8 * m_byte_size, 8 * m_byte_offset);
|
|
m_value.GetScalar() = scalar;
|
|
}
|
|
break;
|
|
default:
|
|
m_error.SetErrorString("parent has invalid value.");
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (m_error.Success()) {
|
|
const bool thread_and_frame_only_if_stopped = true;
|
|
ExecutionContext exe_ctx(
|
|
GetExecutionContextRef().Lock(thread_and_frame_only_if_stopped));
|
|
if (GetCompilerType().GetTypeInfo() & lldb::eTypeHasValue) {
|
|
Value &value = is_instance_ptr_base ? m_parent->GetValue() : m_value;
|
|
m_error =
|
|
value.GetValueAsData(&exe_ctx, m_data, 0, GetModule().get());
|
|
} else {
|
|
m_error.Clear(); // No value so nothing to read...
|
|
}
|
|
}
|
|
|
|
} else {
|
|
m_error.SetErrorStringWithFormat("parent failed to evaluate: %s",
|
|
parent->GetError().AsCString());
|
|
}
|
|
} else {
|
|
m_error.SetErrorString("ValueObjectChild has a NULL parent ValueObject.");
|
|
}
|
|
|
|
return m_error.Success();
|
|
}
|
|
|
|
bool ValueObjectChild::IsInScope() {
|
|
ValueObject *root(GetRoot());
|
|
if (root)
|
|
return root->IsInScope();
|
|
return false;
|
|
}
|