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https://github.com/RPCSX/rpcsx.git
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460 lines
10 KiB
C++
460 lines
10 KiB
C++
#include "memory_viewer_panel.h"
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#include "Emu/Memory/vm.h"
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#include "Emu/Memory/vm_reservation.h"
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#include "Emu/CPU/CPUDisAsm.h"
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#include "Emu/Cell/SPUDisAsm.h"
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#include "Emu/IdManager.h"
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#include "Utilities/Thread.h"
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#include "Utilities/StrUtil.h"
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#include <QCheckBox>
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#include <charconv>
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#include <unordered_map>
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#include <regex>
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#include "util/logs.hpp"
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#include "util/sysinfo.hpp"
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#include "util/asm.hpp"
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LOG_CHANNEL(gui_log, "GUI");
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template <>
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void fmt_class_string<search_mode>::format(std::string& out, u64 arg)
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{
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if (!arg)
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{
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out += "No search modes have been selected";
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}
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for (u32 modes = static_cast<u32>(arg); modes; modes &= modes - 1)
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{
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const u32 mode = modes & ~(modes - 1);
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auto mode_s = [&]() -> std::string_view
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{
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switch (mode)
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{
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case as_string: return "String";
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case as_hex: return "HEX bytes/integer";
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case as_f64: return "Double";
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case as_f32: return "Float";
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case as_inst: return "Instruction";
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case as_regex_inst: return "Regex-Instruction";
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case as_fake_spu_inst: return "SPU Instruction";
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case as_regex_fake_spu_inst: return "SPU Regex-Instruction";
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default: return "";
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}
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}();
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if (mode_s.empty())
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{
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break;
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}
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if (modes != static_cast<u32>(arg))
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{
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out += ", ";
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}
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out += mode_s;
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}
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}
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u64 memory_viewer_panel::OnSearch(std::string wstr, u32 mode)
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{
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if (m_rsx)
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{
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return 0;
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}
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bool case_insensitive = false;
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// First characters for case insensitive search
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const char first_chars[2]{ static_cast<char>(::tolower(wstr[0])), static_cast<char>(::toupper(wstr[0])) };
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std::string_view insensitive_search{first_chars, 2};
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if (insensitive_search[0] == insensitive_search[1])
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{
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// Optimization
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insensitive_search.remove_suffix(1);
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}
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switch (mode)
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{
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case as_inst:
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case as_string:
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case as_regex_inst:
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case as_fake_spu_inst:
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case as_regex_fake_spu_inst:
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{
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case_insensitive = m_chkbox_case_insensitive->isChecked();
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if (case_insensitive)
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{
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std::transform(wstr.begin(), wstr.end(), wstr.begin(), ::tolower);
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}
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break;
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}
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case as_hex:
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{
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constexpr std::string_view hex_chars = "0123456789ABCDEFabcdef";
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// Split
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std::vector<std::string> parts = fmt::split(wstr, {" ", ",", "0x", "0X", "\\x", "h", "H"});
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// Pad zeroes
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for (std::string& part : parts)
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{
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if (part.size() % 2)
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{
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gui_log.warning("Padding string part with '0' at front due to odd hexadecimal characters count.");
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part.insert(part.begin(), '0');
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}
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}
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// Concat strings
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wstr.clear();
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for (const std::string& part : parts)
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{
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wstr += part;
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}
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if (const usz pos = wstr.find_first_not_of(hex_chars); pos != umax)
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{
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gui_log.error("String '%s' cannot be interpreted as hexadecimal byte string due to unknown character '%c'.", m_search_line->text(), wstr[pos]);
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return 0;
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}
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std::string dst;
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dst.resize(wstr.size() / 2);
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for (usz pos = 0; pos < wstr.size() / 2; pos++)
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{
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uchar value = 0;
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std::from_chars(wstr.data() + pos * 2, wstr.data() + (pos + 1) * 2, value, 16);
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std::memcpy(dst.data() + pos, &value, 1);
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}
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wstr = std::move(dst);
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break;
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}
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case as_f64:
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{
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// Remove trailing 'f' letters
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wstr = wstr.substr(0, wstr.find_last_not_of("Ff") + 1);
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char* end{};
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be_t<f64> value = std::strtod(wstr.data(), &end);
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if (wstr.empty() || end != wstr.data() + wstr.size())
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{
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gui_log.error("String '%s' cannot be interpreted as double.", wstr);
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return 0;
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}
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wstr.resize(sizeof(value));
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std::memcpy(wstr.data(), &value, sizeof(value));
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break;
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}
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case as_f32:
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{
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wstr = wstr.substr(0, wstr.find_last_not_of("Ff") + 1);
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char* end{};
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be_t<f32> value = std::strtof(wstr.data(), &end);
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if (wstr.empty() || end != wstr.data() + wstr.size())
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{
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gui_log.error("String '%s' cannot be interpreted as float.", wstr);
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return 0;
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}
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wstr.resize(sizeof(value));
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std::memcpy(wstr.data(), &value, sizeof(value));
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break;
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}
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default: ensure(false);
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}
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// Search the address space for the string
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atomic_t<u32> found = 0;
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atomic_t<u32> avail_addr = 0;
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// There's no need for so many threads (except for instructions searching)
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const u32 max_threads = utils::aligned_div(utils::get_thread_count(), mode < as_inst ? 2 : 1);
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static constexpr u32 block_size = 0x2000000;
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vm::writer_lock rlock;
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const named_thread_group workers("Memory Searcher "sv, max_threads, [&]()
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{
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if (mode == as_inst || mode == as_fake_spu_inst || mode == as_regex_inst || mode == as_regex_fake_spu_inst)
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{
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auto disasm = m_disasm->copy_type_erased();
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disasm->change_mode(cpu_disasm_mode::normal);
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SPUDisAsm spu_dis(cpu_disasm_mode::normal, static_cast<const u8*>(m_ptr));
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const usz limit = std::min(m_size, m_ptr == vm::g_sudo_addr ? 0xFFFF'0000 : m_size);
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while (true)
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{
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u32 addr;
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const bool ok = avail_addr.fetch_op([&](u32& val)
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{
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if (val < limit && val != umax)
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{
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while (m_ptr == vm::g_sudo_addr && !vm::check_addr(val, mode == as_inst ? vm::page_executable : 0))
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{
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// Skip unmapped memory
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val = utils::align(val + 1, 0x10000);
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if (!val)
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{
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return false;
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}
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}
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addr = val;
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// Iterate 16k instructions at a time
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val += 0x10000;
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if (!val)
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{
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// Overflow detection
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val = -1;
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}
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return true;
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}
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return false;
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}).second;
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if (!ok)
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{
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return;
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}
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u32 spu_base_pc = 0;
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if (mode == as_fake_spu_inst)
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{
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// Check if we can extend the limits of SPU decoder so it can use the previous 64k block
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// For SPU instruction patterns
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spu_base_pc = (addr >= 0x10000 && (m_ptr != vm::g_sudo_addr || vm::check_addr(addr - 0x10000, 0))) ? 0x10000 : 0;
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// Set base for SPU decoder
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spu_dis.change_ptr(static_cast<const u8*>(m_ptr) + addr - spu_base_pc);
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}
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for (u32 i = 0; i < 0x10000; i += 4)
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{
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if (mode == as_fake_spu_inst ? spu_dis.disasm(spu_base_pc + i) : disasm->disasm(addr + i))
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{
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auto& last = mode == as_fake_spu_inst ? spu_dis.last_opcode : disasm->last_opcode;
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if (case_insensitive)
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{
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std::transform(last.begin(), last.end(), last.begin(), ::tolower);
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}
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std::smatch sm;
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if (mode & (as_regex_inst | as_regex_fake_spu_inst) ? std::regex_search(last, sm, std::regex(wstr)) : last.find(wstr) != umax)
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{
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gui_log.success("Found instruction at 0x%08x: '%s'", addr + i, last);
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found++;
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}
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}
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}
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}
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return;
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}
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u32 local_found = 0;
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u32 addr = 0;
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bool ok = false;
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const u64 addr_limit = (m_size >= block_size ? m_size - block_size : 0);
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while (true)
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{
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if (!(addr % block_size))
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{
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std::tie(addr, ok) = avail_addr.fetch_op([&](u32& val)
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{
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if (val <= addr_limit)
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{
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// Iterate in 32MB blocks
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val += block_size;
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if (!val) val = -1; // Overflow detection
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return true;
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}
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return false;
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});
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}
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if (!ok)
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{
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break;
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}
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if (![&]()
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{
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if (m_ptr != vm::g_sudo_addr)
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{
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// Always valid
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return true;
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}
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// Skip unmapped memory
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for (const u32 end = utils::align(addr + 1, block_size) - 0x1000; !vm::check_addr(addr, 0); addr += 0x1000)
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{
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if (addr == end)
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{
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return false;
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}
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}
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return true;
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}())
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{
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if (addr == 0u - 0x1000)
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{
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break;
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}
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// The entire block is unmapped
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addr += 0x1000;
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continue;
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}
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const u64 end_mem = std::min<u64>(utils::align<u64>(addr + 1, block_size), m_size);
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u64 addr_max = m_ptr == vm::g_sudo_addr ? addr : end_mem;
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// Determine allocation size quickly
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while (addr_max < end_mem && vm::check_addr(static_cast<u32>(addr_max), vm::page_1m_size))
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{
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addr_max += 0x100000;
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}
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while (addr_max < end_mem && vm::check_addr(static_cast<u32>(addr_max), vm::page_64k_size))
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{
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addr_max += 0x10000;
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}
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while (addr_max < end_mem && vm::check_addr(static_cast<u32>(addr_max), 0))
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{
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addr_max += 0x1000;
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}
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auto get_ptr = [&](u32 address)
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{
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return static_cast<const char*>(m_ptr) + address;
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};
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std::string_view section{get_ptr(addr), addr_max - addr};
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usz first_char = 0;
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auto log_occurance = [&](std::string_view& test_sv, bool always_log_str)
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{
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// Cut out a view which may or may not be suffixed by a single null character
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// This view is a peek at the full string which resides in PS3 memory
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test_sv = test_sv.substr(0, std::max<usz>(wstr.size(), 100));
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const usz null_pos = test_sv.find_first_of("\n\0"sv, wstr.size());
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test_sv = test_sv.substr(0, null_pos);
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const usz start = test_sv.data() - get_ptr(0);
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if (!always_log_str && test_sv.size() == wstr.size())
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{
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// Shorthand logging for identical strings
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gui_log.success("Found at 0x%08x", start);
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}
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else if (null_pos != umax)
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{
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gui_log.success("Found at 0x%08x: '%s'", start, test_sv);
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}
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else
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{
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gui_log.success("Found at 0x%08x: '%s'..", start, test_sv);
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}
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};
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if (case_insensitive)
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{
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while (first_char = section.find_first_of(insensitive_search, first_char), first_char != umax)
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{
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const u32 start = addr + ::narrow<u32>(first_char);
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std::string_view test_sv{get_ptr(start), addr_max - start};
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// Do not use allocating functions such as fmt::to_lower
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if (test_sv.size() >= wstr.size() && std::all_of(wstr.begin(), wstr.end(), [&](const char& c) { return c == ::tolower(test_sv[&c - wstr.data()]); }))
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{
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// Force full logging if any character differs in case
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log_occurance(test_sv, !test_sv.starts_with(wstr));
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local_found++;
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}
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// Allow overlapping strings
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first_char++;
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}
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}
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else
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{
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while (first_char = section.find_first_of(wstr[0], first_char), first_char != umax)
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{
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const u32 start = addr + ::narrow<u32>(first_char);
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std::string_view test_sv{get_ptr(start), addr_max - start};
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if (test_sv.starts_with(wstr))
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{
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if (mode == as_string)
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{
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log_occurance(test_sv, false);
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}
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else
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{
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gui_log.success("Found at 0x%08x", start);
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}
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local_found++;
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}
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first_char++;
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}
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}
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// Check if at last page
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if (addr_max >= m_size - 0x1000)
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{
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break;
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}
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addr = addr_max;
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}
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found += local_found;
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});
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workers.join();
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return found;
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}
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