Add log regex filter (#9)

src/android/app/src/main/jni/config.cpp

@@ -244,12 +244,14 @@ void Config::ReadValues() {
 
     // Miscellaneous
     ReadSetting("Miscellaneous", Settings::values.log_filter);
+    ReadSetting("Miscellaneous", Settings::values.log_regex_filter);
 
     // Apply the log_filter setting as the logger has already been initialized
     // and doesn't pick up the filter on its own.
     Common::Log::Filter filter;
     filter.ParseFilterString(Settings::values.log_filter.GetValue());
     Common::Log::SetGlobalFilter(filter);
+    Common::Log::SetRegexFilter(Settings::values.log_regex_filter.GetValue());
 
     // Debugging
     Settings::values.record_frame_times =

src/citra/config.cpp

@@ -306,12 +306,14 @@ void Config::ReadValues() {
 
     // Miscellaneous
     ReadSetting("Miscellaneous", Settings::values.log_filter);
+    ReadSetting("Miscellaneous", Settings::values.log_regex_filter);
 
     // Apply the log_filter setting as the logger has already been initialized
     // and doesn't pick up the filter on its own.
     Common::Log::Filter filter;
     filter.ParseFilterString(Settings::values.log_filter.GetValue());
     Common::Log::SetGlobalFilter(filter);
+    Common::Log::SetRegexFilter(Settings::values.log_regex_filter.GetValue());
 
     // Debugging
     Settings::values.record_frame_times =

src/citra_qt/configuration/config.cpp

@@ -536,6 +536,7 @@ void Config::ReadMiscellaneousValues() {
     qt_config->beginGroup(QStringLiteral("Miscellaneous"));
 
     ReadBasicSetting(Settings::values.log_filter);
+    ReadBasicSetting(Settings::values.log_regex_filter);
     ReadBasicSetting(Settings::values.enable_gamemode);
 
     qt_config->endGroup();
@@ -1068,6 +1069,7 @@ void Config::SaveMiscellaneousValues() {
     qt_config->beginGroup(QStringLiteral("Miscellaneous"));
 
     WriteBasicSetting(Settings::values.log_filter);
+    WriteBasicSetting(Settings::values.log_regex_filter);
     WriteBasicSetting(Settings::values.enable_gamemode);
 
     qt_config->endGroup();

src/citra_qt/configuration/configure_debug.cpp

@@ -97,6 +97,8 @@ void ConfigureDebug::SetConfiguration() {
     ui->toggle_console->setEnabled(!is_powered_on);
     ui->toggle_console->setChecked(UISettings::values.show_console.GetValue());
     ui->log_filter_edit->setText(QString::fromStdString(Settings::values.log_filter.GetValue()));
+    ui->log_regex_filter_edit->setText(
+        QString::fromStdString(Settings::values.log_regex_filter.GetValue()));
     ui->toggle_cpu_jit->setChecked(Settings::values.use_cpu_jit.GetValue());
     ui->delay_start_for_lle_modules->setChecked(
         Settings::values.delay_start_for_lle_modules.GetValue());
@@ -126,10 +128,12 @@ void ConfigureDebug::ApplyConfiguration() {
     Settings::values.gdbstub_port = ui->gdbport_spinbox->value();
     UISettings::values.show_console = ui->toggle_console->isChecked();
     Settings::values.log_filter = ui->log_filter_edit->text().toStdString();
+    Settings::values.log_regex_filter = ui->log_regex_filter_edit->text().toStdString();
     Debugger::ToggleConsole();
     Common::Log::Filter filter;
     filter.ParseFilterString(Settings::values.log_filter.GetValue());
     Common::Log::SetGlobalFilter(filter);
+    Common::Log::SetRegexFilter(Settings::values.log_regex_filter.GetValue());
     Settings::values.use_cpu_jit = ui->toggle_cpu_jit->isChecked();
     Settings::values.delay_start_for_lle_modules = ui->delay_start_for_lle_modules->isChecked();
     Settings::values.renderer_debug = ui->toggle_renderer_debug->isChecked();

src/citra_qt/configuration/configure_debug.ui

@@ -85,6 +85,20 @@
         </item>
        </layout>
       </item>
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout">
+        <item>
+         <widget class="QLabel" name="label_3">
+          <property name="text">
+           <string>Regex Log Filter</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QLineEdit" name="log_regex_filter_edit"/>
+        </item>
+       </layout>
+      </item>
       <item>
        <layout class="QHBoxLayout" name="horizontalLayout_2">
         <item>

src/common/logging/backend.cpp

@@ -3,6 +3,7 @@
 // Refer to the license.txt file included.
 
 #include <chrono>
+#include <boost/regex.hpp>
 
 #include <fmt/format.h>
 
@@ -234,6 +235,19 @@ public:
         filter = f;
     }
 
+    bool SetRegexFilter(const std::string& regex) {
+        if (regex.empty()) {
+            regex_filter = boost::regex();
+            return true;
+        }
+        regex_filter = boost::regex(regex, boost::regex_constants::no_except);
+        if (regex_filter.status() != 0) {
+            regex_filter = boost::regex();
+            return false;
+        }
+        return true;
+    }
+
     void SetColorConsoleBackendEnabled(bool enabled) {
         color_console_backend.SetEnabled(enabled);
     }
@@ -243,8 +257,13 @@ public:
         if (!filter.CheckMessage(log_class, log_level)) {
             return;
         }
-        message_queue.EmplaceWait(
+        Entry new_entry =
-            CreateEntry(log_class, log_level, filename, line_num, function, std::move(message)));
+            CreateEntry(log_class, log_level, filename, line_num, function, std::move(message));
+        if (!regex_filter.empty() &&
+            !boost::regex_search(FormatLogMessage(new_entry), regex_filter)) {
+            return;
+        }
+        message_queue.EmplaceWait(new_entry);
     }
 
 private:
@@ -406,6 +425,7 @@ private:
     static inline std::unique_ptr<Impl, decltype(&Deleter)> instance{nullptr, Deleter};
 
     Filter filter;
+    boost::regex regex_filter;
     DebuggerBackend debugger_backend{};
     ColorConsoleBackend color_console_backend{};
     FileBackend file_backend;
@@ -446,6 +466,10 @@ void SetGlobalFilter(const Filter& filter) {
     Impl::Instance().SetGlobalFilter(filter);
 }
 
+bool SetRegexFilter(const std::string& regex) {
+    return Impl::Instance().SetRegexFilter(regex);
+}
+
 void SetColorConsoleBackendEnabled(bool enabled) {
     Impl::Instance().SetColorConsoleBackendEnabled(enabled);
 }

src/common/logging/backend.h

@@ -26,5 +26,11 @@ void DisableLoggingInTests();
  */
 void SetGlobalFilter(const Filter& filter);
 
+/**
+ * Only allow messages that match the specified regex. The regex is matched against the final log
+ * text.
+ */
+bool SetRegexFilter(const std::string& regex);
+
 void SetColorConsoleBackendEnabled(bool enabled);
 } // namespace Common::Log

src/common/settings.h

@@ -542,6 +542,7 @@ struct Values {
 
     // Miscellaneous
     Setting<std::string> log_filter{"*:Info", "log_filter"};
+    Setting<std::string> log_regex_filter{"", "log_regex_filter"};
 
     // Video Dumping
     std::string output_format;