iOS应用Emperors因内存过高被系统终止，求排查方案

问题背景 #

应用「Emperors」（电商类，日常处理大量数据、图片）因内存占用过高被iOS系统终止，崩溃发生时未进行数据处理或图片加载操作，此前无此类问题。错误提示及控制台日志如下：

应用“Emperors”因内存占用过高被操作系统终止。
请使用内存分析工具跟踪进程内存使用情况。

控制台日志 #

The app “Emperors” has been killed by the operating system because it is using too much memory.
Domain: IDEDebugSessionErrorDomain
Code: 11
Recovery Suggestion: Use a memory profiling tool to track the process memory usage.
User Info: {
    DVTErrorCreationDateKey = "2025-01-13 03:57:04 +0000";
    IDERunOperationFailingWorker = DBGLLDBLauncher;
}
--
Event Metadata: com.apple.dt.IDERunOperationWorkerFinished : {
    "device_identifier" = "00008030-001244593A10802E";
    "device_isCoreDevice" = 1;
    "device_model" = "iPhone12,1";
    "device_osBuild" = "18.2 (22C152)";
    "device_platform" = "com.apple.platform.iphoneos";
    "device_thinningType" = "iPhone12,1";
    "dvt_coredevice_version" = "397.28";
    "dvt_coresimulator_version" = "993.7";
    "dvt_mobiledevice_version" = "1759.40.2.100.1";
    "launchSession_schemeCommand" = Run;
    "launchSession_state" = 2;
    "launchSession_targetArch" = arm64;
    "operation_duration_ms" = 329262;
    "operation_errorCode" = 11;
    "operation_errorDomain" = IDEDebugSessionErrorDomain;
    "operation_errorWorker" = DBGLLDBLauncher;
    "operation_name" = IDERunOperationWorkerGroup;
    "param_debugger_attachToExtensions" = 0;
    "param_debugger_attachToXPC" = 1;
    "param_debugger_type" = 3;
    "param_destination_isProxy" = 0;
    "param_destination_platform" = "com.apple.platform.iphoneos";
    "param_diag_113575882_enable" = 0;
    "param_diag_MainThreadChecker_stopOnIssue" = 0;
    "param_diag_MallocStackLogging_enableDuringAttach" = 0;
    "param_diag_MallocStackLogging_enableForXPC" = 1;
    "param_diag_allowLocationSimulation" = 1;
    "param_diag_checker_tpc_enable" = 1;
    "param_diag_gpu_frameCapture_enable" = 0;
    "param_diag_gpu_shaderValidation_enable" = 0;
    "param_diag_gpu_validation_enable" = 0;
    "param_diag_guardMalloc_enable" = 0;
    "param_diag_memoryGraphOnResourceException" = 0;
    "param_diag_mtc_enable" = 1;
    "param_diag_queueDebugging_enable" = 1;
    "param_diag_runtimeProfile_generate" = 0;
    "param_diag_sanitizer_asan_enable" = 0;
    "param_diag_sanitizer_tsan_enable" = 0;
    "param_diag_sanitizer_tsan_stopOnIssue" = 0;
    "param_diag_sanitizer_ubsan_enable" = 0;
    "param_diag_sanitizer_ubsan_stopOnIssue" = 0;
    "param_diag_showNonLocalizedStrings" = 0;
    "param_diag_viewDebugging_enabled" = 1;
    "param_diag_viewDebugging_insertDylibOnLaunch" = 1;
    "param_install_style" = 2;
    "param_launcher_UID" = 2;
    "param_launcher_allowDeviceSensorReplayData" = 0;
    "param_launcher_kind" = 0;
    "param_launcher_style" = 99;
    "param_launcher_substyle" = 0;
    "param_runnable_appExtensionHostRunMode" = 0;
    "param_runnable_productType" = "com.apple.product-type.application";
    "param_structuredConsoleMode" = 1;
    "param_testing_launchedForTesting" = 0;
    "param_testing_suppressSimulatorApp" = 0;
    "param_testing_usingCLI" = 0;
    "sdk_canonicalName" = "iphoneos18.2";
    "sdk_osVersion" = "18.2";
    "sdk_variant" = iphoneos;
}
--
System Information
macOS Version 15.1 (Build 24B83)
Xcode 16.2 (23507) (Build 16C5032a)
Timestamp: 2025-01-13T09:27:04+05:30

排查步骤 #

• 实时监控内存变化：打开Xcode的Debug Navigator → 选择Memory面板，运行应用后持续观察内存曲线。重点关注是否存在内存持续攀升、未回落的情况，定位增长阶段对应的操作。
• 分析内存图找泄漏：在调试会话中点击Memory Graph Debugger按钮（📊），查看对象引用链。优先检查：
  • 图片缓存类是否未限制内存占用或未及时清理
  • 数据模型对象是否存在强引用循环（如闭包捕获、代理未使用弱引用）
  • 页面销毁后是否仍有大量对象未释放
• 启用Malloc Stack Logging：在Xcode Scheme的Diagnostics选项卡中勾选Malloc Stack Logging，重新运行应用。崩溃后使用malloc_history命令分析内存分配记录，定位大内存块的分配来源。
• 检查后台活动：通过XcodeDebug Navigator的Energy面板查看后台任务，确认是否有后台数据同步、预加载等进程在占用内存。
• 复现特定场景：模拟应用长时间运行、多次前后台切换、浏览过大量商品页面后静置，尝试复现崩溃，缩小排查范围。
• 排查第三方库：检查近期新增/更新的第三方SDK（尤其是图片加载、数据处理类），确认是否存在内存泄漏或不合理的内存占用。

内容的提问来源于stack exchange，提问作者Sanjyot Shah