feat(logs): add sentry__logs_force_flush on calling sentry_flush

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+**Features**:
+
+- Add logs flush on `sentry_flush()`. ([#1434](https://github.com/getsentry/sentry-native/pull/1434))
+
 ## 0.12.0
 
 **Breaking changes**:

src/sentry_core.c

@@ -314,6 +314,9 @@ sentry_flush(uint64_t timeout)
 {
     int rv = 0;
     SENTRY_WITH_OPTIONS (options) {
+        if (options->enable_logs) {
+            sentry__logs_force_flush();
+        }
         rv = sentry__transport_flush(options->transport, timeout);
     }
     return rv;

src/sentry_logs.c

@@ -904,6 +904,15 @@ sentry__logs_flush_crash_safe(void)
     SENTRY_DEBUG("crash-safe logs flush complete");
 }
 
+void
+sentry__logs_force_flush(void)
+{
+    while (sentry__atomic_fetch(&g_logs_state.flushing)) {
+        sentry__cpu_relax();
+    }
+    flush_logs_queue(false);
+}
+
 #ifdef SENTRY_UNITTEST
 /**
  * Wait for the logs batching thread to be ready.

src/sentry_logs.h

@@ -23,6 +23,8 @@ void sentry__logs_shutdown(uint64_t timeout);
  */
 void sentry__logs_flush_crash_safe(void);
 
+void sentry__logs_force_flush(void);
+
 #ifdef SENTRY_UNITTEST
 int populate_message_parameters(
     sentry_value_t attributes, const char *message, va_list args);

tests/unit/test_logs.c

@@ -287,3 +287,39 @@ SENTRY_TEST(logs_param_types)
     uint64_t g = 0xDEADBEEFDEADBEEF;
     test_param_conversion_types("%u %d %f %c %s %p %x", a, b, c, d, e, f, g);
 }
+
+SENTRY_TEST(logs_force_flush)
+{
+    transport_validation_data_t validation_data = { 0, false };
+
+    SENTRY_TEST_OPTIONS_NEW(options);
+    sentry_options_set_dsn(options, "https://[email protected]/42");
+    sentry_options_set_enable_logs(options, true);
+
+    sentry_transport_t *transport
+        = sentry_transport_new(validate_logs_envelope);
+    sentry_transport_set_state(transport, &validation_data);
+    sentry_options_set_transport(options, transport);
+
+    sentry_init(options);
+    sentry__logs_wait_for_thread_startup();
+
+    // These should not crash and should respect the enable_logs option
+    TEST_CHECK_INT_EQUAL(sentry_log_trace("Trace message"), 0);
+    sentry_flush(5000);
+    TEST_CHECK_INT_EQUAL(sentry_log_debug("Debug message"), 0);
+    sentry_flush(5000);
+    TEST_CHECK_INT_EQUAL(sentry_log_info("Info message"), 0);
+    sentry_flush(5000);
+    TEST_CHECK_INT_EQUAL(sentry_log_warn("Warning message"), 0);
+    sentry_flush(5000);
+    TEST_CHECK_INT_EQUAL(sentry_log_error("Error message"), 0);
+    sentry_flush(5000);
+    TEST_CHECK_INT_EQUAL(sentry_log_fatal("Fatal message"), 0);
+    sentry_flush(5000);
+    sentry_close();
+
+    // Validate results on main thread (no race condition)
+    TEST_CHECK(!validation_data.has_validation_error);
+    TEST_CHECK_INT_EQUAL(validation_data.called_count, 6);
+}

tests/unit/tests.inc

@@ -88,6 +88,7 @@ XX(lazy_attachments)
 XX(logger_enable_disable_functionality)
 XX(logger_level)
 XX(logs_disabled_by_default)
+XX(logs_force_flush)
 XX(logs_param_conversion)
 XX(logs_param_types)
 XX(message_with_null_text_is_valid)