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| 1 | +/*************************************************************************** |
| 2 | + * Copyright (C) 2022 PCSX-Redux authors * |
| 3 | + * * |
| 4 | + * This program is free software; you can redistribute it and/or modify * |
| 5 | + * it under the terms of the GNU General Public License as published by * |
| 6 | + * the Free Software Foundation; either version 2 of the License, or * |
| 7 | + * (at your option) any later version. * |
| 8 | + * * |
| 9 | + * This program is distributed in the hope that it will be useful, * |
| 10 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| 11 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| 12 | + * GNU General Public License for more details. * |
| 13 | + * * |
| 14 | + * You should have received a copy of the GNU General Public License * |
| 15 | + * along with this program; if not, write to the * |
| 16 | + * Free Software Foundation, Inc., * |
| 17 | + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * |
| 18 | + ***************************************************************************/ |
| 19 | + |
| 20 | +#include "gui/widgets/memory_observer.h" |
| 21 | + |
| 22 | +#include <magic_enum/include/magic_enum.hpp> |
| 23 | + |
| 24 | +#include "core/psxemulator.h" |
| 25 | +#include "core/psxmem.h" |
| 26 | +#include "core/system.h" |
| 27 | + |
| 28 | +void PCSX::Widgets::MemoryObserver::draw(const char* title) { |
| 29 | + if (!ImGui::Begin(title, &m_show)) { |
| 30 | + ImGui::End(); |
| 31 | + return; |
| 32 | + } |
| 33 | + |
| 34 | + const uint8_t* memData = g_emulator->m_psxMem->g_psxM; |
| 35 | + const uint32_t memSize = 1024 * 1024 * (g_emulator-> settings. get<PCSX::Emulator::Setting8MB>() ? 8 : 2); |
| 36 | + const uint32_t memBase = 0x80000000; |
| 37 | + const auto stride = static_cast<uint8_t>(m_scanAlignment); |
| 38 | + |
| 39 | + if (m_AddressValuePairs.empty() && ImGui::Button("First scan")) { |
| 40 | + |
| 41 | + int memValue = 0; |
| 42 | + |
| 43 | + for (uint32_t i = 0; i < memSize; ++i) { |
| 44 | + if (i != 0 && i % stride == 0) { |
| 45 | + switch (m_scanType) { |
| 46 | + case ScanType::ExactValue: |
| 47 | + if (memValue == m_value) { |
| 48 | + m_AddressValuePairs.push_back({memBase + i - stride, memValue}); |
| 49 | + } |
| 50 | + break; |
| 51 | + case ScanType::BiggerThan: |
| 52 | + if (memValue > m_value) { |
| 53 | + m_AddressValuePairs.push_back({memBase + i - stride, memValue}); |
| 54 | + } |
| 55 | + break; |
| 56 | + case ScanType::SmallerThan: |
| 57 | + if (memValue < m_value) { |
| 58 | + m_AddressValuePairs.push_back({memBase + i - stride, memValue}); |
| 59 | + } |
| 60 | + break; |
| 61 | + case ScanType::Changed: |
| 62 | + case ScanType::Unchanged: |
| 63 | + case ScanType::Increased: |
| 64 | + case ScanType::Decreased: |
| 65 | + break; |
| 66 | + case ScanType::UnknownInitialValue: |
| 67 | + m_AddressValuePairs.push_back({memBase + i - stride, memValue}); |
| 68 | + break; |
| 69 | + } |
| 70 | + |
| 71 | + memValue = 0; |
| 72 | + } |
| 73 | + |
| 74 | + const uint8_t currentByte = memData[i]; |
| 75 | + const uint8_t leftShift = 8 * (stride - 1 - i % stride); |
| 76 | + const uint32_t mask = 0xffffffff ^ (0xff << leftShift); |
| 77 | + const int byteToWrite = currentByte << leftShift; |
| 78 | + memValue = (memValue & mask) | byteToWrite; |
| 79 | + } |
| 80 | + } |
| 81 | + |
| 82 | + if (!m_AddressValuePairs.empty() && ImGui::Button("Next scan")) { |
| 83 | + auto doesntMatchCriterion = [this, memData, memSize, memBase, stride]( |
| 84 | + const AddressValuePair& addressValuePair) { |
| 85 | + const uint32_t address = addressValuePair.address; |
| 86 | + const int memValue = getMemValue(address, memData, memSize, memBase, stride); |
| 87 | + |
| 88 | + switch (m_scanType) { |
| 89 | + case ScanType::ExactValue: |
| 90 | + return memValue != m_value; |
| 91 | + case ScanType::BiggerThan: |
| 92 | + return memValue <= m_value; |
| 93 | + case ScanType::SmallerThan: |
| 94 | + return memValue >= m_value; |
| 95 | + case ScanType::Changed: |
| 96 | + return memValue == addressValuePair.scannedValue; |
| 97 | + case ScanType::Unchanged: |
| 98 | + return memValue != addressValuePair.scannedValue; |
| 99 | + case ScanType::Increased: |
| 100 | + return memValue <= addressValuePair.scannedValue; |
| 101 | + case ScanType::Decreased: |
| 102 | + return memValue >= addressValuePair.scannedValue; |
| 103 | + case ScanType::UnknownInitialValue: |
| 104 | + return true; |
| 105 | + } |
| 106 | + |
| 107 | + return true; |
| 108 | + }; |
| 109 | + |
| 110 | + std::erase_if(m_AddressValuePairs, doesntMatchCriterion); |
| 111 | + |
| 112 | + if (m_AddressValuePairs.empty()) { |
| 113 | + m_scanType = ScanType::ExactValue; |
| 114 | + } else { |
| 115 | + for (auto& addressValuePair : m_AddressValuePairs) { |
| 116 | + addressValuePair.scannedValue = |
| 117 | + getMemValue(addressValuePair.address, memData, memSize, memBase, stride); |
| 118 | + } |
| 119 | + } |
| 120 | + } |
| 121 | + |
| 122 | + if (!m_AddressValuePairs.empty() && ImGui::Button("New scan")) { |
| 123 | + m_AddressValuePairs.clear(); |
| 124 | + m_scanType = ScanType::ExactValue; |
| 125 | + } |
| 126 | + |
| 127 | + ImGui::Checkbox("Hex", &m_hex); |
| 128 | + ImGui::InputInt("Value", &m_value, 1, 100, |
| 129 | + m_hex ? ImGuiInputTextFlags_CharsHexadecimal : ImGuiInputTextFlags_CharsDecimal); |
| 130 | + |
| 131 | + const auto currentScanAlignment = magic_enum::enum_name(m_scanAlignment); |
| 132 | + if (ImGui::BeginCombo(_("Scan alignment"), currentScanAlignment.data())) { |
| 133 | + for (auto v : magic_enum::enum_values<ScanAlignment>()) { |
| 134 | + bool selected = (v == m_scanAlignment); |
| 135 | + auto name = magic_enum::enum_name(v); |
| 136 | + if (ImGui::Selectable(name.data(), selected)) { |
| 137 | + m_scanAlignment = v; |
| 138 | + } |
| 139 | + if (selected) { |
| 140 | + ImGui::SetItemDefaultFocus(); |
| 141 | + } |
| 142 | + } |
| 143 | + ImGui::EndCombo(); |
| 144 | + } |
| 145 | + |
| 146 | + const auto currentScanType = magic_enum::enum_name(m_scanType); |
| 147 | + if (ImGui::BeginCombo(_("Scan type"), currentScanType.data())) { |
| 148 | + for (auto v : magic_enum::enum_values<ScanType>()) { |
| 149 | + bool selected = (v == m_scanType); |
| 150 | + auto name = magic_enum::enum_name(v); |
| 151 | + if (ImGui::Selectable(name.data(), selected)) { |
| 152 | + m_scanType = v; |
| 153 | + } |
| 154 | + if (selected) { |
| 155 | + ImGui::SetItemDefaultFocus(); |
| 156 | + } |
| 157 | + } |
| 158 | + ImGui::EndCombo(); |
| 159 | + } |
| 160 | + |
| 161 | + static constexpr ImGuiTableFlags flags = ImGuiTableFlags_RowBg | ImGuiTableFlags_Resizable | |
| 162 | + ImGuiTableFlags_Reorderable | ImGuiTableFlags_Hideable | |
| 163 | + ImGuiTableFlags_BordersOuter | ImGuiTableFlags_BordersV; |
| 164 | + if (ImGui::BeginTable("Found values", 4, flags)) { |
| 165 | + ImGui::TableSetupColumn("Address"); |
| 166 | + ImGui::TableSetupColumn("Current value"); |
| 167 | + ImGui::TableSetupColumn("Scanned value"); |
| 168 | + ImGui::TableSetupColumn("Access"); |
| 169 | + ImGui::TableHeadersRow(); |
| 170 | + |
| 171 | + const auto valueDisplayFormat = m_hex ? "%x" : "%i"; |
| 172 | + |
| 173 | + ImGuiListClipper clipper; |
| 174 | + clipper.Begin(m_AddressValuePairs.size()); |
| 175 | + while (clipper.Step()) { |
| 176 | + for (int row = clipper.DisplayStart; row < clipper.DisplayEnd; ++row) { |
| 177 | + const auto& addressValuePair = m_AddressValuePairs[row]; |
| 178 | + const uint32_t currentAddress = addressValuePair.address; |
| 179 | + |
| 180 | + ImGui::TableNextRow(); |
| 181 | + ImGui::TableSetColumnIndex(0); |
| 182 | + ImGui::Text("%x", currentAddress); |
| 183 | + ImGui::TableSetColumnIndex(1); |
| 184 | + ImGui::Text(valueDisplayFormat, getMemValue(currentAddress, memData, memSize, memBase, stride)); |
| 185 | + ImGui::TableSetColumnIndex(2); |
| 186 | + ImGui::Text(valueDisplayFormat, addressValuePair.scannedValue); |
| 187 | + ImGui::TableSetColumnIndex(3); |
| 188 | + auto buttonName = fmt::format(_("Show in memory editor##{}"), row); |
| 189 | + if (ImGui::Button(buttonName.c_str())) { |
| 190 | + const uint32_t editorAddress = currentAddress - memBase; |
| 191 | + g_system->m_eventBus->signal(PCSX::Events::GUI::JumpToMemory{editorAddress, stride}); |
| 192 | + } |
| 193 | + } |
| 194 | + } |
| 195 | + ImGui::EndTable(); |
| 196 | + } |
| 197 | +} |
| 198 | + |
| 199 | +int PCSX::Widgets::MemoryObserver::getMemValue(uint32_t absoluteAddress, const uint8_t* memData, uint32_t memSize, |
| 200 | + uint32_t memBase, uint8_t stride) { |
| 201 | + int memValue = 0; |
| 202 | + const uint32_t relativeAddress = absoluteAddress - memBase; |
| 203 | + assert(relativeAddress < memSize); |
| 204 | + for (uint32_t i = relativeAddress; i < relativeAddress + stride; ++i) { |
| 205 | + const uint8_t currentByte = memData[i]; |
| 206 | + const uint8_t leftShift = 8 * (stride - 1 - i % stride); |
| 207 | + const uint32_t mask = 0xffffffff ^ (0xff << leftShift); |
| 208 | + const int byteToWrite = currentByte << leftShift; |
| 209 | + memValue = (memValue & mask) | byteToWrite; |
| 210 | + } |
| 211 | + return memValue; |
| 212 | +} |
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