DROID-3097 App | Tech | Catch sigsys signals (#1835)

Co-authored-by: Evgenii Kozlov <enklave.mare.balticum@protonmail.com>
Co-authored-by: Evgenii Kozlov <ubuphobos@gmail.com>

.gitignore

@@ -22,4 +22,5 @@ ktlint
 .idea/*.xml
 signing.properties
 app/release
-.kotlin/
+.kotlin/
+app/.cxx

app/build.gradle

@@ -53,6 +53,19 @@ android {
         buildConfigField "boolean", "LOG_EDITOR_CONTROL_PANEL", localProperties.getProperty("LOG_EDITOR_CONTROL_PANEL", "false")
         buildConfigField "boolean", "ENABLE_STRICT_MODE", "false"
         resValue "string", "SENTRY_DSN", config.sentryApiKey
+        externalNativeBuild {
+            cmake {
+                // Specify any cpp flags if needed
+                cppFlags "-std=c++11"
+            }
+       }
+    }
+    
+    externalNativeBuild {
+        cmake {
+            // Provide the path to your CMakeLists.txt file
+            path "src/main/cpp/CMakeLists.txt"
+        }
     }
 
     packagingOptions {

app/src/main/cpp/CMakeLists.txt

@@ -0,0 +1,18 @@
+# CMakeLists.txt
+cmake_minimum_required(VERSION 3.4.1)
+
+add_library(
+    signal_handler
+    SHARED
+    signal_handler.c
+)
+
+find_library(
+    log-lib
+    log
+)
+
+target_link_libraries(
+    signal_handler
+    ${log-lib}
+)

app/src/main/cpp/signal_handler.c

@@ -0,0 +1,30 @@
+// signal_handler.c
+#include <jni.h>
+#include <signal.h>
+#include <android/log.h>
+
+#define LOG_TAG "SignalHandler"
+#define LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)
+
+void sigsys_handler(int signum, siginfo_t *info, void *context) {
+    LOGI("SIGSYS signal received and ignored.");
+    // Ignore the signal to prevent the app from crashing
+}
+
+void setup_sigsys_handler() {
+    struct sigaction sa;
+    sa.sa_flags = SA_SIGINFO;
+    sa.sa_sigaction = sigsys_handler;
+    sigemptyset(&sa.sa_mask);
+    if (sigaction(SIGSYS, &sa, NULL) == -1) {
+        LOGI("Failed to set up SIGSYS handler");
+    } else {
+        LOGI("SIGSYS handler set up successfully");
+    }
+}
+
+// Correctly named JNI function
+JNIEXPORT void JNICALL
+Java_com_anytypeio_anytype_app_AndroidApplication_00024SignalHandler_initSignalHandler(JNIEnv *env, jobject thiz) {
+    setup_sigsys_handler();
+}

app/src/main/java/com/anytypeio/anytype/app/AndroidApplication.kt

@@ -50,11 +50,13 @@ class AndroidApplication : Application(), HasComponentDependencies {
         ComponentManager(main, this)
     }
 
+
     override fun onCreate() {
         if (BuildConfig.ENABLE_STRICT_MODE) {
             enableStrictMode()
         }
         super.onCreate()
+        setupSignalHandler()
         main.inject(this)
         setupAnalytics()
         setupTimber()
@@ -111,10 +113,21 @@ class AndroidApplication : Application(), HasComponentDependencies {
         notificationManager.createNotificationChannel(notificationChannel)
     }
 
+    private fun setupSignalHandler() {
+        SignalHandler.initSignalHandler()
+    }
 
     companion object {
         const val NOTIFICATION_CHANNEL_ID = "anytype_notification_channel"
         const val NOTIFICATION_CHANNEL_NAME = "Local Anytype notifications"
         const val NOTIFICATION_CHANNEL_DESCRIPTION = "Important notifications from Anytype, including collaboration events in multiplayer mode"
     }
+
+    object SignalHandler {
+        init {
+            System.loadLibrary(SIGNAL_HANDLER_LIB_NAME)
+        }
+        external fun initSignalHandler()
+        const val SIGNAL_HANDLER_LIB_NAME = "signal_handler"
+    }
 }