Avoid StrictMode warnings

CHANGELOG.md

@@ -15,6 +15,10 @@
   }
   ```
 
+### Fixes
+
+- Avoid StrictMode warnings ([#4724](https://github.com/getsentry/sentry-java/pull/4724))
+
 ### Improvements
 
 - Remove internal API status from get/setDistinctId ([#4708](https://github.com/getsentry/sentry-java/pull/4708))

sentry-android-core/src/main/java/io/sentry/android/core/SentryAndroid.java

@@ -4,6 +4,7 @@
 import android.app.Application;
 import android.content.Context;
 import android.os.Process;
+import android.os.StrictMode;
 import android.os.SystemClock;
 import io.sentry.ILogger;
 import io.sentry.IScopes;
@@ -93,6 +94,10 @@ public static void init(
       @NotNull final Context context,
       @NotNull ILogger logger,
       @NotNull Sentry.OptionsConfiguration<SentryAndroidOptions> configuration) {
+    final @NotNull StrictMode.ThreadPolicy oldPolicy = StrictMode.getThreadPolicy();
+    final @NotNull StrictMode.VmPolicy oldVmPolicy = StrictMode.getVmPolicy();
+    StrictMode.setThreadPolicy(StrictMode.ThreadPolicy.LAX);
+    StrictMode.setVmPolicy(StrictMode.VmPolicy.LAX);
     try (final @NotNull ISentryLifecycleToken ignored = staticLock.acquire()) {
       Sentry.init(
           OptionsContainer.create(SentryAndroidOptions.class),
@@ -210,6 +215,9 @@ public static void init(
 
       throw new RuntimeException("Failed to initialize Sentry's SDK", e);
     }
+
+    StrictMode.setThreadPolicy(oldPolicy);
+    StrictMode.setVmPolicy(oldVmPolicy);
   }
 
   /**

sentry-android-core/src/main/java/io/sentry/android/core/cache/AndroidEnvelopeCache.java

@@ -19,6 +19,7 @@
 import io.sentry.util.HintUtils;
 import io.sentry.util.Objects;
 import java.io.File;
+import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.OutputStream;
 import org.jetbrains.annotations.ApiStatus;
@@ -157,18 +158,18 @@ public static boolean hasStartupCrashMarker(final @NotNull SentryOptions options
 
     final File lastAnrMarker = new File(cacheDirPath, LAST_ANR_REPORT);
     try {
-      if (lastAnrMarker.exists() && lastAnrMarker.canRead()) {
-        final String content = FileUtils.readText(lastAnrMarker);
-        // we wrapped into try-catch already
-        //noinspection ConstantConditions
-        return content.equals("null") ? null : Long.parseLong(content.trim());
-      } else {
+      final String content = FileUtils.readText(lastAnrMarker);
+      // we wrapped into try-catch already
+      //noinspection ConstantConditions
+      return content.equals("null") ? null : Long.parseLong(content.trim());
+    } catch (Throwable e) {
+      if (e instanceof FileNotFoundException) {
         options
             .getLogger()
             .log(DEBUG, "Last ANR marker does not exist. %s.", lastAnrMarker.getAbsolutePath());
+      } else {
+        options.getLogger().log(ERROR, "Error reading last ANR marker", e);
       }
-    } catch (Throwable e) {
-      options.getLogger().log(ERROR, "Error reading last ANR marker", e);
     }
     return null;
   }

sentry-android-core/src/main/java/io/sentry/android/core/internal/util/CpuInfoUtils.java

@@ -51,8 +51,6 @@ private CpuInfoUtils() {}
         if (!cpuDir.getName().matches("cpu[0-9]+")) continue;
         File cpuMaxFreqFile = new File(cpuDir, CPUINFO_MAX_FREQ_PATH);
 
-        if (!cpuMaxFreqFile.exists() || !cpuMaxFreqFile.canRead()) continue;
-
         long khz;
         try {
           String content = FileUtils.readText(cpuMaxFreqFile);

sentry-android-integration-tests/sentry-uitest-android/src/androidTest/java/io/sentry/uitest/android/SdkInitTests.kt

@@ -1,5 +1,6 @@
 package io.sentry.uitest.android
 
+import android.os.StrictMode
 import androidx.lifecycle.Lifecycle
 import androidx.test.core.app.launchActivity
 import androidx.test.ext.junit.runners.AndroidJUnit4
@@ -269,6 +270,13 @@ class SdkInitTests : BaseUiTest() {
     assertDefaultIntegrations()
   }
 
+  @Test
+  fun initNotThrowStrictMode() {
+    StrictMode.setThreadPolicy(StrictMode.ThreadPolicy.Builder().detectAll().penaltyDeath().build())
+    StrictMode.setVmPolicy(StrictMode.VmPolicy.Builder().detectAll().penaltyDeath().build())
+    initSentry()
+  }
+
   private fun assertDefaultIntegrations() {
     val integrations =
       mutableListOf(

sentry/src/main/java/io/sentry/DirectoryProcessor.java

@@ -40,34 +40,22 @@ public void processDirectory(final @NotNull File directory) {
     try {
       logger.log(SentryLevel.DEBUG, "Processing dir. %s", directory.getAbsolutePath());
 
-      if (!directory.exists()) {
+      final File[] filteredListFiles = directory.listFiles((d, name) -> isRelevantFileName(name));
+      if (filteredListFiles == null) {
         logger.log(
-            SentryLevel.WARNING,
-            "Directory '%s' doesn't exist. No cached events to send.",
+            SentryLevel.ERROR,
+            "Cache dir %s is null or is not a directory.",
             directory.getAbsolutePath());
         return;
       }
-      if (!directory.isDirectory()) {
-        logger.log(
-            SentryLevel.ERROR, "Cache dir %s is not a directory.", directory.getAbsolutePath());
-        return;
-      }
-
-      final File[] listFiles = directory.listFiles();
-      if (listFiles == null) {
-        logger.log(SentryLevel.ERROR, "Cache dir %s is null.", directory.getAbsolutePath());
-        return;
-      }
-
-      final File[] filteredListFiles = directory.listFiles((d, name) -> isRelevantFileName(name));
 
       logger.log(
           SentryLevel.DEBUG,
           "Processing %d items from cache dir %s",
-          filteredListFiles != null ? filteredListFiles.length : 0,
+          filteredListFiles.length,
           directory.getAbsolutePath());
 
-      for (File file : listFiles) {
+      for (File file : filteredListFiles) {
         // it ignores .sentry-native database folder and new ones that might come up
         if (!file.isFile()) {
           logger.log(SentryLevel.DEBUG, "File %s is not a File.", file.getAbsolutePath());

sentry/src/main/java/io/sentry/cache/EnvelopeCache.java

@@ -336,18 +336,17 @@ public void discard(final @NotNull SentryEnvelope envelope) {
     Objects.requireNonNull(envelope, "Envelope is required.");
 
     final File envelopeFile = getEnvelopeFile(envelope);
-    if (envelopeFile.exists()) {
+    if (envelopeFile.delete()) {
       options
           .getLogger()
           .log(DEBUG, "Discarding envelope from cache: %s", envelopeFile.getAbsolutePath());
-
-      if (!envelopeFile.delete()) {
-        options
-            .getLogger()
-            .log(ERROR, "Failed to delete envelope: %s", envelopeFile.getAbsolutePath());
-      }
     } else {
-      options.getLogger().log(DEBUG, "Envelope was not cached: %s", envelopeFile.getAbsolutePath());
+      options
+          .getLogger()
+          .log(
+              DEBUG,
+              "Envelope was not cached or could not be deleted: %s",
+              envelopeFile.getAbsolutePath());
     }
   }
 

sentry/src/test/java/io/sentry/EnvelopeSenderTest.kt

@@ -61,8 +61,8 @@ class EnvelopeSenderTest {
     val sut = fixture.getSut()
     sut.processDirectory(File("i don't exist"))
     verify(fixture.logger)!!.log(
-      eq(SentryLevel.WARNING),
-      eq("Directory '%s' doesn't exist. No cached events to send."),
+      eq(SentryLevel.ERROR),
+      eq("Cache dir %s is null or is not a directory."),
       any<Any>(),
     )
     verifyNoMoreInteractions(fixture.scopes)
@@ -79,14 +79,14 @@ class EnvelopeSenderTest {
     sut.processDirectory(testFile)
     verify(fixture.logger)!!.log(
       eq(SentryLevel.ERROR),
-      eq("Cache dir %s is not a directory."),
+      eq("Cache dir %s is null or is not a directory."),
       any<Any>(),
     )
     verifyNoMoreInteractions(fixture.scopes)
   }
 
   @Test
-  fun `when directory has non event files, processDirectory logs that`() {
+  fun `when directory has non event files, processDirectory skips them`() {
     val sut = fixture.getSut()
     val testFile =
       File(
@@ -96,7 +96,8 @@ class EnvelopeSenderTest {
     testFile.deleteOnExit()
     verify(fixture.logger)!!.log(
       eq(SentryLevel.DEBUG),
-      eq("File '%s' doesn't match extension expected."),
+      eq("Processing %d items from cache dir %s"),
+      eq(0),
       any<Any>(),
     )
     verify(fixture.scopes, never())!!.captureEnvelope(any(), anyOrNull())