lm: Recode LM service

Rework the service to spit out to logs instead of a seperate file as well as fix any crashes caused by lm.

8 files changed, 286 insertions, 345 deletions

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 2f6b22747..9c9b3195b 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -400,8 +400,6 @@ add_library(core STATIC
     hle/service/ldr/ldr.h
     hle/service/lm/lm.cpp
     hle/service/lm/lm.h
-    hle/service/lm/manager.cpp
-    hle/service/lm/manager.h
     hle/service/mig/mig.cpp
     hle/service/mig/mig.h
     hle/service/mii/manager.cpp
diff --git a/src/core/core.cpp b/src/core/core.cpp
index 1a2002dec..86bdc7f6b 100644
--- a/src/core/core.cpp
+++ b/src/core/core.cpp
@@ -36,7 +36,6 @@
 #include "core/hle/service/apm/controller.h"
 #include "core/hle/service/filesystem/filesystem.h"
 #include "core/hle/service/glue/manager.h"
-#include "core/hle/service/lm/manager.h"
 #include "core/hle/service/service.h"
 #include "core/hle/service/sm/sm.h"
 #include "core/hle/service/time/time_manager.h"
@@ -293,8 +292,6 @@ struct System::Impl {
                                         perf_stats->GetMeanFrametime());
         }
 
-        lm_manager.Flush();
-
         is_powered_on = false;
         exit_lock = false;
 
@@ -398,7 +395,6 @@ struct System::Impl {
 
     /// Service State
     Service::Glue::ARPManager arp_manager;
-    Service::LM::Manager lm_manager{reporter};
     Service::Time::TimeManager time_manager;
 
     /// Service manager
@@ -720,14 +716,6 @@ const Service::APM::Controller& System::GetAPMController() const {
     return impl->apm_controller;
 }
 
-Service::LM::Manager& System::GetLogManager() {
-    return impl->lm_manager;
-}
-
-const Service::LM::Manager& System::GetLogManager() const {
-    return impl->lm_manager;
-}
-
 Service::Time::TimeManager& System::GetTimeManager() {
     return impl->time_manager;
 }
diff --git a/src/core/core.h b/src/core/core.h
index 579a774e4..3a8e040c1 100644
--- a/src/core/core.h
+++ b/src/core/core.h
@@ -62,10 +62,6 @@ namespace Glue {
 class ARPManager;
 }
 
-namespace LM {
-class Manager;
-} // namespace LM
-
 namespace SM {
 class ServiceManager;
 } // namespace SM
@@ -351,9 +347,6 @@ public:
     [[nodiscard]] Service::APM::Controller& GetAPMController();
     [[nodiscard]] const Service::APM::Controller& GetAPMController() const;
 
-    [[nodiscard]] Service::LM::Manager& GetLogManager();
-    [[nodiscard]] const Service::LM::Manager& GetLogManager() const;
-
     [[nodiscard]] Service::Time::TimeManager& GetTimeManager();
     [[nodiscard]] const Service::Time::TimeManager& GetTimeManager() const;
 
diff --git a/src/core/hle/service/lm/lm.cpp b/src/core/hle/service/lm/lm.cpp
index 8e49b068c..f4f6533ad 100644
--- a/src/core/hle/service/lm/lm.cpp
+++ b/src/core/hle/service/lm/lm.cpp
@@ -5,22 +5,71 @@
 #include <sstream>
 #include <string>
 
+#include <optional>
+#include <unordered_map>
+#include <boost/container_hash/hash.hpp>
 #include "common/logging/log.h"
 #include "common/scope_exit.h"
 #include "core/core.h"
 #include "core/hle/ipc_helpers.h"
 #include "core/hle/service/lm/lm.h"
-#include "core/hle/service/lm/manager.h"
 #include "core/hle/service/service.h"
 #include "core/memory.h"
 
 namespace Service::LM {
+enum class LogSeverity : u8 {
+    Trace = 0,
+    Info = 1,
+    Warning = 2,
+    Error = 3,
+    Fatal = 4,
+};
+
+// To keep flags out of hashing as well as the payload size
+struct LogPacketHeaderEntry {
+    u64_le pid{};
+    u64_le tid{};
+    LogSeverity severity{};
+    u8 verbosity{};
+
+    auto operator<=>(const LogPacketHeaderEntry&) const = default;
+};
+} // namespace Service::LM
+
+namespace std {
+template <>
+struct hash<Service::LM::LogPacketHeaderEntry> {
+    std::size_t operator()(const Service::LM::LogPacketHeaderEntry& k) const {
+        std::size_t seed{};
+        boost::hash_combine(seed, k.pid);
+        boost::hash_combine(seed, k.tid);
+        boost::hash_combine(seed, k.severity);
+        boost::hash_combine(seed, k.verbosity);
+        return seed;
+    };
+};
+} // namespace std
+
+namespace Service::LM {
+
+enum class LogDestination : u32 {
+    TargetManager = 1 << 0,
+    Uart = 1 << 1,
+    UartSleep = 1 << 2,
+    All = 0xffff,
+};
+DECLARE_ENUM_FLAG_OPERATORS(LogDestination);
+
+enum class LogPacketFlags : u8 {
+    Head = 1 << 0,
+    Tail = 1 << 1,
+    LittleEndian = 1 << 2,
+};
+DECLARE_ENUM_FLAG_OPERATORS(LogPacketFlags);
 
 class ILogger final : public ServiceFramework<ILogger> {
 public:
-    explicit ILogger(Core::System& system_)
-        : ServiceFramework{system_, "ILogger"}, manager{system_.GetLogManager()},
-          memory{system_.Memory()} {
+    explicit ILogger(Core::System& system_) : ServiceFramework{system_, "ILogger"} {
         static const FunctionInfo functions[] = {
             {0, &ILogger::Log, "Log"},
             {1, &ILogger::SetDestination, "SetDestination"},
@@ -30,54 +79,260 @@ public:
 
 private:
     void Log(Kernel::HLERequestContext& ctx) {
+        std::size_t offset{};
+        const auto data = ctx.ReadBuffer();
+
         // This function only succeeds - Get that out of the way
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
 
-        // Read MessageHeader, despite not doing anything with it right now
-        MessageHeader header{};
-        VAddr addr{ctx.BufferDescriptorX()[0].Address()};
-        const VAddr end_addr{addr + ctx.BufferDescriptorX()[0].size};
-        memory.ReadBlock(addr, &header, sizeof(MessageHeader));
-        addr += sizeof(MessageHeader);
-
-        FieldMap fields;
-        while (addr < end_addr) {
-            const auto field = static_cast<Field>(memory.Read8(addr++));
-            const auto length = memory.Read8(addr++);
+        if (data.size() < sizeof(LogPacketHeader)) {
+            LOG_ERROR(Service_LM, "Data size is too small for header! size={}", data.size());
+            return;
+        }
 
-            if (static_cast<Field>(memory.Read8(addr)) == Field::Skip) {
-                ++addr;
-            }
+        LogPacketHeader header{};
+        std::memcpy(&header, data.data(), sizeof(LogPacketHeader));
+        offset += sizeof(LogPacketHeader);
 
-            SCOPE_EXIT({ addr += length; });
+        LogPacketHeaderEntry entry{
+            .pid = header.pid,
+            .tid = header.tid,
+            .severity = header.severity,
+            .verbosity = header.verbosity,
+        };
 
-            if (field == Field::Skip) {
-                continue;
+        if (True(header.flags & LogPacketFlags::Head)) {
+            std::vector<u8> tmp(data.size() - sizeof(LogPacketHeader));
+            std::memcpy(tmp.data(), data.data() + offset, tmp.size());
+            entries[entry] = std::move(tmp);
+        } else {
+            // Append to existing entry
+            if (!entries.contains(entry)) {
+                LOG_ERROR(Service_LM, "Log entry does not exist!");
+                return;
             }
+            std::vector<u8> tmp(data.size() - sizeof(LogPacketHeader));
 
-            std::vector<u8> data(length);
-            memory.ReadBlock(addr, data.data(), length);
-            fields.emplace(field, std::move(data));
+            auto& existing_entry = entries[entry];
+            const auto base = existing_entry.size();
+            existing_entry.resize(base + (data.size() - sizeof(LogPacketHeader)));
+            std::memcpy(existing_entry.data() + base, data.data() + offset,
+                        (data.size() - sizeof(LogPacketHeader)));
         }
 
-        manager.Log({header, std::move(fields)});
+        if (True(header.flags & LogPacketFlags::Tail)) {
+            auto it = entries.find(entry);
+            if (it == entries.end()) {
+                LOG_ERROR(Service_LM, "Log entry does not exist!");
+                return;
+            }
+            ParseLog(it->first, it->second);
+            entries.erase(it);
+        }
     }
 
     void SetDestination(Kernel::HLERequestContext& ctx) {
         IPC::RequestParser rp{ctx};
-        const auto destination = rp.PopEnum<DestinationFlag>();
-
-        LOG_DEBUG(Service_LM, "called, destination={:08X}", destination);
+        const auto log_destination = rp.PopEnum<LogDestination>();
 
-        manager.SetDestination(destination);
+        LOG_DEBUG(Service_LM, "called, destination={}", DestinationToString(log_destination));
+        destination = log_destination;
 
         IPC::ResponseBuilder rb{ctx, 2};
         rb.Push(RESULT_SUCCESS);
     }
 
-    Manager& manager;
-    Core::Memory::Memory& memory;
+    u32 ReadLeb128(const std::vector<u8>& data, std::size_t& offset) {
+        u32 result{};
+        u32 shift{};
+        do {
+            result |= (data[offset] & 0x7f) << shift;
+            shift += 7;
+            offset++;
+            if (offset >= data.size()) {
+                break;
+            }
+        } while ((data[offset] & 0x80) != 0);
+        return result;
+    }
+
+    std::optional<std::string> ReadString(const std::vector<u8>& data, std::size_t& offset,
+                                          std::size_t length) {
+        if (length == 0) {
+            return std::nullopt;
+        }
+        std::string output(length, '\0');
+        std::memcpy(output.data(), data.data() + offset, length);
+        offset += length;
+        return output;
+    }
+
+    u32_le ReadAsU32(const std::vector<u8>& data, std::size_t& offset, std::size_t length) {
+        ASSERT(length == sizeof(u32));
+        u32_le output{};
+        std::memcpy(&output, data.data() + offset, sizeof(u32));
+        offset += length;
+        return output;
+    }
+
+    u64_le ReadAsU64(const std::vector<u8>& data, std::size_t& offset, std::size_t length) {
+        ASSERT(length == sizeof(u64));
+        u64_le output{};
+        std::memcpy(&output, data.data() + offset, sizeof(u64));
+        offset += length;
+        return output;
+    }
+
+    void ParseLog(const LogPacketHeaderEntry entry, const std::vector<u8>& log_data) {
+        // Possible entries
+        std::optional<std::string> text_log;
+        std::optional<u32> line_number;
+        std::optional<std::string> file_name;
+        std::optional<std::string> function_name;
+        std::optional<std::string> module_name;
+        std::optional<std::string> thread_name;
+        std::optional<u64> log_pack_drop_count;
+        std::optional<s64> user_system_clock;
+        std::optional<std::string> process_name;
+
+        std::size_t offset{};
+        while (offset < log_data.size()) {
+            const auto key = static_cast<LogDataChunkKey>(ReadLeb128(log_data, offset));
+            const auto chunk_size = ReadLeb128(log_data, offset);
+
+            switch (key) {
+            case LogDataChunkKey::LogSessionBegin:
+            case LogDataChunkKey::LogSessionEnd:
+                break;
+            case LogDataChunkKey::TextLog:
+                text_log = ReadString(log_data, offset, chunk_size);
+                break;
+            case LogDataChunkKey::LineNumber:
+                line_number = ReadAsU32(log_data, offset, chunk_size);
+                break;
+            case LogDataChunkKey::FileName:
+                file_name = ReadString(log_data, offset, chunk_size);
+                break;
+            case LogDataChunkKey::FunctionName:
+                function_name = ReadString(log_data, offset, chunk_size);
+                break;
+            case LogDataChunkKey::ModuleName:
+                module_name = ReadString(log_data, offset, chunk_size);
+                break;
+            case LogDataChunkKey::ThreadName:
+                thread_name = ReadString(log_data, offset, chunk_size);
+                break;
+            case LogDataChunkKey::LogPacketDropCount:
+                log_pack_drop_count = ReadAsU64(log_data, offset, chunk_size);
+                break;
+            case LogDataChunkKey::UserSystemClock:
+                user_system_clock = ReadAsU64(log_data, offset, chunk_size);
+                break;
+            case LogDataChunkKey::ProcessName:
+                process_name = ReadString(log_data, offset, chunk_size);
+                break;
+            }
+        }
+
+        std::string output_log{};
+        if (process_name) {
+            output_log += fmt::format("Process: {}\n", *process_name);
+        }
+        if (module_name) {
+            output_log += fmt::format("Module: {}\n", *module_name);
+        }
+        if (file_name) {
+            output_log += fmt::format("File: {}\n", *file_name);
+        }
+        if (function_name) {
+            output_log += fmt::format("Function: {}\n", *function_name);
+        }
+        if (line_number && *line_number != 0) {
+            output_log += fmt::format("Line: {}\n", *line_number);
+        }
+        output_log += fmt::format("ProcessID: {}\n", entry.pid);
+        output_log += fmt::format("ThreadID: {}\n", entry.tid);
+
+        if (text_log) {
+            output_log += fmt::format("Log Text: {}\n", *text_log);
+        }
+
+        switch (entry.severity) {
+        case LogSeverity::Trace:
+            LOG_DEBUG(Service_LM, "LogManager DEBUG ({}):\n{}", DestinationToString(destination),
+                      output_log);
+            break;
+        case LogSeverity::Info:
+            LOG_INFO(Service_LM, "LogManager INFO ({}):\n{}", DestinationToString(destination),
+                     output_log);
+            break;
+        case LogSeverity::Warning:
+            LOG_WARNING(Service_LM, "LogManager WARNING ({}):\n{}",
+                        DestinationToString(destination), output_log);
+            break;
+        case LogSeverity::Error:
+            LOG_ERROR(Service_LM, "LogManager ERROR ({}):\n{}", DestinationToString(destination),
+                      output_log);
+            break;
+        case LogSeverity::Fatal:
+            LOG_CRITICAL(Service_LM, "LogManager FATAL ({}):\n{}", DestinationToString(destination),
+                         output_log);
+            break;
+        default:
+            LOG_CRITICAL(Service_LM, "LogManager UNKNOWN ({}):\n{}",
+                         DestinationToString(destination), output_log);
+            break;
+        }
+    }
+
+    std::string DestinationToString(LogDestination destination) {
+        if (True(destination & LogDestination::All)) {
+            return "TargetManager | Uart | UartSleep";
+        }
+        std::string output{};
+        if (True(destination & LogDestination::TargetManager)) {
+            output += "| TargetManager";
+        }
+        if (True(destination & LogDestination::Uart)) {
+            output += "| Uart";
+        }
+        if (True(destination & LogDestination::UartSleep)) {
+            output += "| UartSleep";
+        }
+        if (output.length() > 0) {
+            return output.substr(2);
+        }
+        return "No Destination";
+    }
+
+    enum class LogDataChunkKey : u32 {
+        LogSessionBegin = 0,
+        LogSessionEnd = 1,
+        TextLog = 2,
+        LineNumber = 3,
+        FileName = 4,
+        FunctionName = 5,
+        ModuleName = 6,
+        ThreadName = 7,
+        LogPacketDropCount = 8,
+        UserSystemClock = 9,
+        ProcessName = 10,
+    };
+
+    struct LogPacketHeader {
+        u64_le pid{};
+        u64_le tid{};
+        LogPacketFlags flags{};
+        INSERT_PADDING_BYTES(1);
+        LogSeverity severity{};
+        u8 verbosity{};
+        u32_le payload_size{};
+    };
+    static_assert(sizeof(LogPacketHeader) == 0x18, "LogPacketHeader is an invalid size");
+
+    std::unordered_map<LogPacketHeaderEntry, std::vector<u8>> entries{};
+    LogDestination destination{LogDestination::All};
 };
 
 class LM final : public ServiceFramework<LM> {
diff --git a/src/core/hle/service/lm/manager.cpp b/src/core/hle/service/lm/manager.cpp
deleted file mode 100644
index 3ee2374e7..000000000
--- a/src/core/hle/service/lm/manager.cpp
+++ /dev/null
@@ -1,134 +0,0 @@
-// Copyright 2019 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include "common/assert.h"
-#include "common/logging/log.h"
-#include "common/string_util.h"
-#include "core/hle/service/lm/manager.h"
-#include "core/reporter.h"
-
-namespace Service::LM {
-
-std::ostream& operator<<(std::ostream& os, DestinationFlag dest) {
-    std::vector<std::string> array;
-    const auto check_single_flag = [dest, &array](DestinationFlag check, std::string name) {
-        if ((static_cast<u32>(check) & static_cast<u32>(dest)) != 0) {
-            array.emplace_back(std::move(name));
-        }
-    };
-
-    check_single_flag(DestinationFlag::Default, "Default");
-    check_single_flag(DestinationFlag::UART, "UART");
-    check_single_flag(DestinationFlag::UARTSleeping, "UART (Sleeping)");
-
-    os << "[";
-    for (const auto& entry : array) {
-        os << entry << ", ";
-    }
-    return os << "]";
-}
-
-std::ostream& operator<<(std::ostream& os, MessageHeader::Severity severity) {
-    switch (severity) {
-    case MessageHeader::Severity::Trace:
-        return os << "Trace";
-    case MessageHeader::Severity::Info:
-        return os << "Info";
-    case MessageHeader::Severity::Warning:
-        return os << "Warning";
-    case MessageHeader::Severity::Error:
-        return os << "Error";
-    case MessageHeader::Severity::Critical:
-        return os << "Critical";
-    default:
-        return os << fmt::format("{:08X}", static_cast<u32>(severity));
-    }
-}
-
-std::ostream& operator<<(std::ostream& os, Field field) {
-    switch (field) {
-    case Field::Skip:
-        return os << "Skip";
-    case Field::Message:
-        return os << "Message";
-    case Field::Line:
-        return os << "Line";
-    case Field::Filename:
-        return os << "Filename";
-    case Field::Function:
-        return os << "Function";
-    case Field::Module:
-        return os << "Module";
-    case Field::Thread:
-        return os << "Thread";
-    default:
-        return os << fmt::format("{:08X}", static_cast<u32>(field));
-    }
-}
-
-std::string FormatField(Field type, const std::vector<u8>& data) {
-    switch (type) {
-    case Field::Skip:
-        return "";
-    case Field::Line:
-        if (data.size() >= sizeof(u32)) {
-            u32 line;
-            std::memcpy(&line, data.data(), sizeof(u32));
-            return fmt::format("{}", line);
-        }
-        return "[ERROR DECODING LINE NUMBER]";
-    case Field::Message:
-    case Field::Filename:
-    case Field::Function:
-    case Field::Module:
-    case Field::Thread:
-        return Common::StringFromFixedZeroTerminatedBuffer(
-            reinterpret_cast<const char*>(data.data()), data.size());
-    default:
-        UNIMPLEMENTED_MSG("Unimplemented field type={}", type);
-        return "";
-    }
-}
-
-Manager::Manager(Core::Reporter& reporter) : reporter(reporter) {}
-
-Manager::~Manager() = default;
-
-void Manager::SetEnabled(bool enabled) {
-    this->enabled = enabled;
-}
-
-void Manager::SetDestination(DestinationFlag destination) {
-    this->destination = destination;
-}
-
-void Manager::Log(LogMessage message) {
-    if (message.header.IsHeadLog()) {
-        InitializeLog();
-    }
-
-    current_log.emplace_back(std::move(message));
-
-    if (current_log.back().header.IsTailLog()) {
-        FinalizeLog();
-    }
-}
-
-void Manager::Flush() {
-    FinalizeLog();
-}
-
-void Manager::InitializeLog() {
-    current_log.clear();
-
-    LOG_INFO(Service_LM, "Initialized new log session");
-}
-
-void Manager::FinalizeLog() {
-    reporter.SaveLogReport(static_cast<u32>(destination), std::move(current_log));
-
-    LOG_INFO(Service_LM, "Finalized current log session");
-}
-
-} // namespace Service::LM
diff --git a/src/core/hle/service/lm/manager.h b/src/core/hle/service/lm/manager.h
deleted file mode 100644
index 544e636ba..000000000
--- a/src/core/hle/service/lm/manager.h
+++ /dev/null
@@ -1,106 +0,0 @@
-// Copyright 2019 yuzu emulator team
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <map>
-#include <ostream>
-#include <vector>
-#include "common/bit_field.h"
-#include "common/common_types.h"
-#include "common/swap.h"
-
-namespace Core {
-class Reporter;
-}
-
-namespace Service::LM {
-
-enum class DestinationFlag : u32 {
-    Default = 1,
-    UART = 2,
-    UARTSleeping = 4,
-
-    All = 0xFFFF,
-};
-
-struct MessageHeader {
-    enum Flags : u32_le {
-        IsHead = 1,
-        IsTail = 2,
-    };
-    enum Severity : u32_le {
-        Trace,
-        Info,
-        Warning,
-        Error,
-        Critical,
-    };
-
-    u64_le pid;
-    u64_le thread_context;
-    union {
-        BitField<0, 16, Flags> flags;
-        BitField<16, 8, Severity> severity;
-        BitField<24, 8, u32> verbosity;
-    };
-    u32_le payload_size;
-
-    bool IsHeadLog() const {
-        return flags & IsHead;
-    }
-    bool IsTailLog() const {
-        return flags & IsTail;
-    }
-};
-static_assert(sizeof(MessageHeader) == 0x18, "MessageHeader is incorrect size");
-
-enum class Field : u8 {
-    Skip = 1,
-    Message = 2,
-    Line = 3,
-    Filename = 4,
-    Function = 5,
-    Module = 6,
-    Thread = 7,
-};
-
-std::ostream& operator<<(std::ostream& os, DestinationFlag dest);
-std::ostream& operator<<(std::ostream& os, MessageHeader::Severity severity);
-std::ostream& operator<<(std::ostream& os, Field field);
-
-using FieldMap = std::map<Field, std::vector<u8>>;
-
-struct LogMessage {
-    MessageHeader header;
-    FieldMap fields;
-};
-
-std::string FormatField(Field type, const std::vector<u8>& data);
-
-class Manager {
-public:
-    explicit Manager(Core::Reporter& reporter);
-    ~Manager();
-
-    void SetEnabled(bool enabled);
-    void SetDestination(DestinationFlag destination);
-
-    void Log(LogMessage message);
-
-    void Flush();
-
-private:
-    void InitializeLog();
-    void FinalizeLog();
-
-    bool enabled = true;
-    DestinationFlag destination = DestinationFlag::All;
-
-    std::vector<LogMessage> current_log;
-
-    Core::Reporter& reporter;
-};
-
-} // namespace Service::LM
diff --git a/src/core/reporter.cpp b/src/core/reporter.cpp
index 0becdf642..f199c3362 100644
--- a/src/core/reporter.cpp
+++ b/src/core/reporter.cpp
@@ -20,7 +20,6 @@
 #include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/result.h"
-#include "core/hle/service/lm/manager.h"
 #include "core/memory.h"
 #include "core/reporter.h"
 #include "core/settings.h"
@@ -360,55 +359,6 @@ void Reporter::SaveErrorReport(u64 title_id, ResultCode result,
     SaveToFile(std::move(out), GetPath("error_report", title_id, timestamp));
 }
 
-void Reporter::SaveLogReport(u32 destination, std::vector<Service::LM::LogMessage> messages) const {
-    if (!IsReportingEnabled()) {
-        return;
-    }
-
-    const auto timestamp = GetTimestamp();
-    json out;
-
-    out["yuzu_version"] = GetYuzuVersionData();
-    out["report_common"] =
-        GetReportCommonData(system.CurrentProcess()->GetTitleID(), RESULT_SUCCESS, timestamp);
-
-    out["log_destination"] =
-        fmt::format("{}", static_cast<Service::LM::DestinationFlag>(destination));
-
-    auto json_messages = json::array();
-    std::transform(messages.begin(), messages.end(), std::back_inserter(json_messages),
-                   [](const Service::LM::LogMessage& message) {
-                       json out;
-                       out["is_head"] = fmt::format("{}", message.header.IsHeadLog());
-                       out["is_tail"] = fmt::format("{}", message.header.IsTailLog());
-                       out["pid"] = fmt::format("{:016X}", message.header.pid);
-                       out["thread_context"] =
-                           fmt::format("{:016X}", message.header.thread_context);
-                       out["payload_size"] = fmt::format("{:016X}", message.header.payload_size);
-                       out["flags"] = fmt::format("{:04X}", message.header.flags.Value());
-                       out["severity"] = fmt::format("{}", message.header.severity.Value());
-                       out["verbosity"] = fmt::format("{:02X}", message.header.verbosity);
-
-                       auto fields = json::array();
-                       std::transform(message.fields.begin(), message.fields.end(),
-                                      std::back_inserter(fields), [](const auto& kv) {
-                                          json out;
-                                          out["type"] = fmt::format("{}", kv.first);
-                                          out["data"] =
-                                              Service::LM::FormatField(kv.first, kv.second);
-                                          return out;
-                                      });
-
-                       out["fields"] = std::move(fields);
-                       return out;
-                   });
-
-    out["log_messages"] = std::move(json_messages);
-
-    SaveToFile(std::move(out),
-               GetPath("log_report", system.CurrentProcess()->GetTitleID(), timestamp));
-}
-
 void Reporter::SaveFilesystemAccessReport(Service::FileSystem::LogMode log_mode,
                                           std::string log_message) const {
     if (!IsReportingEnabled())
diff --git a/src/core/reporter.h b/src/core/reporter.h
index 86d760cf0..b2c2d9a2e 100644
--- a/src/core/reporter.h
+++ b/src/core/reporter.h
@@ -72,9 +72,6 @@ public:
     void SaveFilesystemAccessReport(Service::FileSystem::LogMode log_mode,
                                     std::string log_message) const;
 
-    // Used by lm services
-    void SaveLogReport(u32 destination, std::vector<Service::LM::LogMessage> messages) const;
-
     // Can be used anywhere to generate a backtrace and general info report at any point during
     // execution. Not intended to be used for anything other than debugging or testing.
     void SaveUserReport() const;