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//===-- RegisterContextMemory.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 "RegisterContextMemory.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Thread.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "lldb/Utility/RegisterValue.h"
#include "lldb/Utility/Status.h"
using namespace lldb;
using namespace lldb_private;
// RegisterContextMemory constructor
RegisterContextMemory::RegisterContextMemory(Thread &thread,
uint32_t concrete_frame_idx,
DynamicRegisterInfo ®_infos,
addr_t reg_data_addr)
: RegisterContext(thread, concrete_frame_idx), m_reg_infos(reg_infos),
m_reg_valid(), m_reg_data(), m_reg_data_addr(reg_data_addr) {
// Resize our vector of bools to contain one bool for every register. We will
// use these boolean values to know when a register value is valid in
// m_reg_data.
const size_t num_regs = reg_infos.GetNumRegisters();
assert(num_regs > 0);
m_reg_valid.resize(num_regs);
// Make a heap based buffer that is big enough to store all registers
m_data =
std::make_shared<DataBufferHeap>(reg_infos.GetRegisterDataByteSize(), 0);
m_reg_data.SetData(m_data);
}
// Destructor
RegisterContextMemory::~RegisterContextMemory() = default;
void RegisterContextMemory::InvalidateAllRegisters() {
if (m_reg_data_addr != LLDB_INVALID_ADDRESS)
SetAllRegisterValid(false);
}
void RegisterContextMemory::SetAllRegisterValid(bool b) {
std::vector<bool>::iterator pos, end = m_reg_valid.end();
for (pos = m_reg_valid.begin(); pos != end; ++pos)
*pos = b;
}
size_t RegisterContextMemory::GetRegisterCount() {
return m_reg_infos.GetNumRegisters();
}
const RegisterInfo *RegisterContextMemory::GetRegisterInfoAtIndex(size_t reg) {
return m_reg_infos.GetRegisterInfoAtIndex(reg);
}
size_t RegisterContextMemory::GetRegisterSetCount() {
return m_reg_infos.GetNumRegisterSets();
}
const RegisterSet *RegisterContextMemory::GetRegisterSet(size_t reg_set) {
return m_reg_infos.GetRegisterSet(reg_set);
}
uint32_t RegisterContextMemory::ConvertRegisterKindToRegisterNumber(
lldb::RegisterKind kind, uint32_t num) {
return m_reg_infos.ConvertRegisterKindToRegisterNumber(kind, num);
}
bool RegisterContextMemory::ReadRegister(const RegisterInfo *reg_info,
RegisterValue ®_value) {
const uint32_t reg_num = reg_info->kinds[eRegisterKindLLDB];
if (!m_reg_valid[reg_num]) {
if (!ReadAllRegisterValues(m_data))
return false;
}
const bool partial_data_ok = false;
return reg_value
.SetValueFromData(*reg_info, m_reg_data, reg_info->byte_offset,
partial_data_ok)
.Success();
}
bool RegisterContextMemory::WriteRegister(const RegisterInfo *reg_info,
const RegisterValue ®_value) {
if (m_reg_data_addr != LLDB_INVALID_ADDRESS) {
const uint32_t reg_num = reg_info->kinds[eRegisterKindLLDB];
addr_t reg_addr = m_reg_data_addr + reg_info->byte_offset;
Status error(WriteRegisterValueToMemory(reg_info, reg_addr,
reg_info->byte_size, reg_value));
m_reg_valid[reg_num] = false;
return error.Success();
}
return false;
}
bool RegisterContextMemory::ReadAllRegisterValues(
WritableDataBufferSP &data_sp) {
if (m_reg_data_addr != LLDB_INVALID_ADDRESS) {
ProcessSP process_sp(CalculateProcess());
if (process_sp) {
Status error;
if (process_sp->ReadMemory(m_reg_data_addr, data_sp->GetBytes(),
data_sp->GetByteSize(),
error) == data_sp->GetByteSize()) {
SetAllRegisterValid(true);
return true;
}
}
}
return false;
}
bool RegisterContextMemory::WriteAllRegisterValues(
const DataBufferSP &data_sp) {
if (m_reg_data_addr != LLDB_INVALID_ADDRESS) {
ProcessSP process_sp(CalculateProcess());
if (process_sp) {
Status error;
SetAllRegisterValid(false);
if (process_sp->WriteMemory(m_reg_data_addr, data_sp->GetBytes(),
data_sp->GetByteSize(),
error) == data_sp->GetByteSize())
return true;
}
}
return false;
}
void RegisterContextMemory::SetAllRegisterData(
const lldb::DataBufferSP &data_sp) {
m_reg_data.SetData(data_sp);
SetAllRegisterValid(true);
}
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