{"id":2088,"date":"2024-07-13T14:54:45","date_gmt":"2024-07-13T06:54:45","guid":{"rendered":"https:\/\/flandre-scarlet.moe\/blog\/?p=2088"},"modified":"2024-09-12T22:25:56","modified_gmt":"2024-09-12T14:25:56","slug":"%e9%83%a8%e5%88%86-crash-%e5%88%86%e6%9e%90%e8%ae%b0%e5%bd%95","status":"publish","type":"post","link":"https:\/\/flandre-scarlet.moe\/blog\/2088\/","title":{"rendered":"\u90e8\u5206 Crash \u5206\u6790\u8bb0\u5f55"},"content":{"rendered":"

\u60f3\u7740\u8bb0\u5f55\u4e00\u4e0b\u5e73\u65f6\u5206\u6790\u8fc7\u7684 crash dump\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u603b\u7ed3\u548c\u53c2\u8003\u3002\u4e0d\u8fc7\u56e0\u4e3a\u6d89\u53ca\u5230\u516c\u53f8\u4ee3\u7801\uff0c\u6240\u4ee5\u4e00\u4e9b\u7ec6\u8282\u6ca1\u6cd5\u63cf\u8ff0\u592a\u660e\u767d\uff0ccrash \u5806\u6808\u548c\u5bf9\u5e94\u7684\u6e90\u4ee3\u7801\u4e5f\u4e0d\u65b9\u4fbf\u8d34\u51fa\u6765\u4e86\u3002\u8fd9\u91cc\u5148\u6574\u7406\u4e86\u51e0\u4e2a\u6bd4\u8f83\u6709\u4ee3\u8868\u6027\u7684\uff0c\u5176\u4ed6\u4e00\u773c\u5c31\u80fd\u770b\u51fa\u95ee\u9898\u7684\u5c31\u4e0d\u5199\u5230\u8fd9\u91cc\u4e86\u3002<\/p>\n

2023.Q3 ui \u4ee3\u7801\u6ca1\u6709\u6e05\u7406 framework api \u6307\u9488<\/h3>\n

\u5f53\u7528\u6237\u5f00\u542f\u8ba1\u7b97\u673a\u9501\u5c4f\u65f6\u81ea\u52a8\u5207\u65ad channel \u7684\u7b56\u7565\u5e76\u89e6\u53d1\u4e86\u9501\u5c4f\u884c\u4e3a\u540e\uff0cUI \u4f1a\u8c03\u7528 api \u5207\u65ad\u6240\u6709 channel\uff0c\u5e76\u4e14\u7acb\u5373\u6e05\u7406\u4e0a\u5c42\u4fdd\u5b58\u7684\u6570\u636e\uff0c\u4f46\u95ee\u9898\u5c31\u5728\u8fd9\u4e2a\u6e05\u7406\u4e0a\u3002
\n\u539f\u672c\u8c03\u7528\u89e6\u53d1\u5207\u65ad\u7684 api \u540e\u4f1a\u6709\u4e00\u4e2a\u56de\u8c03\u901a\u77e5\uff0c\u4e0a\u5c42\u662f\u5728\u56de\u8c03\u91cc\u505a\u6e05\u7406\u52a8\u4f5c\u7684\u3002\u4f46\u662f\u73b0\u5728\u4ee3\u7801\u4e2d\u4e3b\u52a8\u8c03\u7528\u4e86\u4e00\u4e2a channel_mgr.Clear();<\/em>\uff0c\u8fd9\u4e2a Clear()<\/em> \u51fd\u6570\u91cc\u6e05\u7406\u7684\u4e0d\u5b8c\u5168\uff0c\u76f8\u6bd4\u4e4b\u4e0b\u53e6\u4e00\u4e2a\u6210\u5458\u51fd\u6570 Delete(channel_id)<\/em> \u624d\u662f\u505a\u5230\u4e86\u5f7b\u5e95\u6e05\u7406\u3002\u540c\u65f6\u56de\u8c03\u51fd\u6570\u91cc\u8fd8\u505a\u4e86\u8bb8\u591a\u989d\u5916\u7684\u6e05\u7406\u64cd\u4f5c\uff0c\u8fd9\u91cc\u4e00\u4e2a Clear()<\/em> \u628a\u5176\u4ed6\u64cd\u4f5c\u4e5f\u90fd\u5ffd\u7565\u6389\u4e86\u3002
\n\u5176\u5b9e\u7a76\u5176\u539f\u56e0\u5c31\u662f\u5916\u90e8\u4fdd\u5b58\u4e86 ChannelItem \u7684\u88f8\u6307\u9488\uff0c\u4f46\u662f\u53c8\u5b58\u5728\u8fd9\u6837\u4e00\u4e2a corner case \u6ca1\u6709\u5c06\u5b83\u6e05\u7406\u6389\uff0c\u7b49 ChannelItem \u5b9e\u4f8b\u6790\u6784\u540e\u8fd9\u4e2a\u6307\u9488\u5c31\u91ce\u4e86\u3002\u5173\u952e\u5728\u4e8e\u600e\u4e48\u53d1\u73b0\u8fd9\u4e2a\u4ee3\u7801\u8def\u5f84\u3002
\n\u56e0\u4e3a framework \u5c42\u5728\u91ca\u653e\u524d\u603b\u662f\u4f1a\u901a\u8fc7\u56de\u8c03\u51fd\u6570\u901a\u77e5 UI \u6e05\u7406\uff0c\u8d39\u597d\u5927\u52b2\u6392\u9664 framework \u6ca1\u6709\u6f0f\u6389\u7684\u5730\u65b9\u540e\u628a\u76ee\u6807\u653e\u5230\u4e86 UI \u4e0a\u3002\u6765\u6765\u56de\u56de\u7ffb\u4ee3\u7801\u540e\u624d\u53d1\u73b0\u8fd9\u4e2a\u5730\u65b9\u3002
\n<\/p>\n

2024.Q2 \u91ca\u653e\u5bf9\u8c61\u540e\u6ca1\u6709\u901a\u77e5\u5bfc\u81f4\u5176\u4ed6\u7c7b\u6301\u6709\u91ce\u6307\u9488<\/h3>\n

\u67d0\u4e2a\u4ea7\u54c1\u5728 web \u4e0a\u6709\u4e2a move division \u64cd\u4f5c\uff0cmove \u540e client \u5c31\u4f1a\u6536\u5230\u7528\u6237\u88ab\u5220\u9664\u7684\u901a\u77e5\uff0c\u968f\u540e client \u4f1a\u53cd\u521d\u59cb\u5316\u8be5\u4ea7\u54c1\u4f7f\u7528\u5230\u7684\u76f8\u5173\u7ec4\u4ef6\u548c\u8d44\u6e90\u3002\u4e4b\u540e\u53ea\u8981\u7528\u6237\u9000\u51fa\u5230\u767b\u5f55\u754c\u9762\uff0c\u518d\u91cd\u65b0\u767b\u5f55\u65f6 client \u5c31\u4f1a crash\u3002
\n\u67e5\u770b\u5806\u6808\u53d1\u73b0\u8ddf ipc \u5bf9\u8c61\u6709\u5173\uff0cipc \u8d44\u6e90\u4e5f\u662f\u4e0a\u9762 client \u6e05\u7406\u64cd\u4f5c\u7684\u4e00\u90e8\u5206\u3002\u4ee3\u7801\u4e2d\u8fd9\u4e2a\u7c7b\u662f ipc \u6d88\u606f\u7684\u4e00\u4e2a handler\uff0c\u4fdd\u5b58\u65b0\u7684 ipc \u6307\u9488\u524d\u4f1a\u5c06 this \u6307\u9488\u4ece\u5f53\u524d ipcserver \u7684 handlers \u91cc\u9762\u79fb\u9664\uff0c\u800c\u5806\u6808\u5c31\u662f\u6302\u5728\u8fd9\u91cc\uff0c\u53ef\u89c1\u662f\u524d\u4e00\u4e2a ipcserver \u6307\u9488\u91ce\u6389\u4e86\u4f46\u662f\u6ca1\u901a\u77e5\u8fd9\u4e2a\u7c7b\u53bb\u6e05\u7406\u3002
\n\u81ea\u4ece framework \u4ee3\u7801\u91cd\u6784\u540e\u5230\u5904\u90fd\u5728\u8bbe\u7f6e ipcserver\uff0c\u4e00\u65f6\u95f4\u5f88\u96be\u4ece\u65e5\u5fd7\u6216\u8005\u4ee3\u7801\u4e2d\u770b\u51fa\u54ea\u4e00\u4e2a\u64cd\u4f5c\u5fd8\u8bb0\u901a\u77e5\u5230\u8fd9\u4e2a\u7c7b\u505a\u6e05\u9664\u64cd\u4f5c\u3002\u597d\u5728\u95ee\u9898\u5bb9\u6613\u590d\u73b0\uff0c\u8c03\u8bd5\u51e0\u6b21\u540e\u53d1\u73b0\u662f\u5728 client \u6536\u5230\u5220\u7528\u6237\u7684\u901a\u77e5\u540e\u505a\u9000\u51fa\u6e05\u7406\u65f6\uff0cipc \u5b9e\u4f8b\u7ec8\u6b62\u5e76\u91ca\u653e\u540e\u6ca1\u6709\u901a\u77e5\u76f8\u5e94\u7684\u56de\u8c03\u505a\u6307\u9488\u7684\u6e05\u7406\uff0c\u5bfc\u81f4\u8fd9\u4e2a module \u5bf9\u8c61\u4e2d\u6301\u6709\u7684 ipcserver \u6307\u9488\u5931\u6548\u3002\u771f\u662f\u706f\u4e0b\u9ed1\u4e86\u3002\u8fd9\u4e2a\u95ee\u9898\u540c\u4e0a\u4e00\u4e2a\u4e00\u6837\uff0c\u539f\u56e0\u662f\u633a\u76f4\u767d\u7684\uff0c\u4f46\u662f\u8981\u4ece\u4f17\u591a\u4ee3\u7801\u91cc\u627e\u5230\u89e6\u53d1\u6761\u4ef6\u9700\u8981\u8010\u5fc3\u548c\u4ed4\u7ec6\u53bb\u5206\u6790\u3002
\n\u4fee\u6539\u53ea\u8981\u52a0\u4e0a\u6307\u9488\u6e05\u7406\u7684\u901a\u77e5\u5373\u53ef\u3002
\n\u6307\u9488\u8bbe\u7f6e\u7684\u5730\u65b9\u591a\u4e86\u4e4b\u540e\u5c31\u5f88\u96be\u7ba1\u7406\u548c\u4e00\u4e00\u901a\u77e5\u66f4\u65b0\uff0c\u53ef\u4ee5\u8003\u8651\u7528 shared_ptr + weal_ptr \u7ec4\u5408\u907f\u514d\u6307\u9488\u5931\u6548\u3002\u4e5f\u53ef\u4ee5\u4f7f ipcserver \u6307\u9488\u6210\u4e3a\u4e00\u4e2a\u521b\u5efa\u540e\u5c31\u4e0d\u53d8\u7684\u53d8\u91cf\uff0c\u5b83\u5185\u90e8\u5b9e\u9645\u7684 ipc \u8fde\u63a5\u518d\u6839\u636e\u9700\u8981\u521b\u5efa\u6216\u65ad\u5f00\u5373\u53ef\u3002\u6216\u8005\u5c31\u4e00\u76f4\u4fdd\u6301\u7740\u8fd9\u4e2a\u901a\u9053\uff0c\u6ca1\u6709\u4e1a\u52a1\u5c31\u4e0d\u53d1\u6570\u636e\uff0c\u76f4\u5230\u4e0b\u6b21\u91cd\u542f client\u3002\u603b\u4e4b\u907f\u514d\u9700\u8981\u901a\u77e5\u6240\u6709\u5bf9\u8c61\u66f4\u65b0\u6307\u9488\u7684\u64cd\u4f5c\u3002<\/p>\n

2024.Q2 \u5bb9\u5668\u8bbf\u95ee\u8d8a\u754c<\/h3>\n

\u8fd9\u4e2a\u95ee\u9898\u5728\u4e09\u4e2a\u6708\u524d\u7684\u7248\u672c\u4e0a\u7ebf\u540e\u5c31\u51fa\u73b0\u4e86\uff0c\u4e0d\u8fc7 iOS \u5e73\u53f0\u6211\u8fd9\u8fb9\u5173\u6ce8\u7684\u5c11\uff0c\u5e73\u65f6\u770b windows \u6bd4\u8f83\u591a\uff0c\u6bd5\u7adf\u7528\u6237\u91cf\u5927\u3002\u7136\u540e\u516c\u53f8 QA team \u4e5f\u6ca1\u6709\u53d1\u73b0\u8fd9\u79cd\u95ee\u9898\uff0c\u6240\u4ee5\u6700\u8fd1\u624d\u4ece iOS team \u90a3\u8fb9\u4e86\u89e3\u5230\u60c5\u51b5\u3002\u4f46\u662f\u548c\u540c\u4e8b\u63a2\u8ba8\u540e\u53d1\u73b0\uff0c\u8fd9\u4e2a\u95ee\u9898\u5e94\u8be5\u662f\u65e9\u5728\u5927\u534a\u5e74\u524d\u5c31\u51fa\u73b0\u4e86\uff0c\u4f46\u662f\u90a3\u4e2a\u65f6\u5019\u6570\u91cf\u5f88\u5c11\u4e5f\u5c31\u6ca1\u6709\u5f15\u8d77\u5173\u6ce8\uff0c\u4e09\u4e2a\u6708\u524d iOS \u90a3\u8fb9\u505a\u4e86\u4e00\u4e9b\u4f18\u5316\u540e crash \u7684\u6570\u91cf\u589e\u52a0\u4e86\u5f88\u591a\uff0c\u8fd9\u624d\u5f15\u8d77\u5173\u6ce8\u3002\u800c\u4e14\u4f18\u5316\u540e crash \u5806\u6808\u6709\u6240\u53d8\u5316\uff0c\u4e00\u4e0b\u5b50\u8fd8\u8ba4\u4e0d\u51fa\u6765\u3002
\n\u5176\u5b9e\u6000\u7591\u662f\u4e0d\u662f\u8ddf\u4e0a\u9762 Mac \u90a3\u4e2a\u91ce\u6307\u9488 crash \u4e00\u4e2a\u539f\u56e0\uff0c\u53ea\u4e0d\u8fc7 iOS \u7684\u5806\u6808\u8ddf\u5b83\u4e0d\u592a\u4e00\u6837\u3002\u770b\u4e86\u6c47\u7f16\u540e\u53d1\u73b0\u662f\u6302\u5728\u8bbf\u95ee\u5bb9\u5668\u5143\u7d20\u7684\u865a\u8868\uff0c\u51c6\u5907\u505a\u865a\u51fd\u6570\u8c03\u7528\u7684\u5730\u65b9\u2014\u2014\u6240\u4ee5\u6211\u624d\u8fd9\u6837\u60f3\u4e86\uff0c\u7136\u540e\u82b1\u4e86\u4e0d\u5c11\u65f6\u95f4\u627e\u662f\u4e0d\u662f ipc_server \u7684 handler \u6ce8\u518c\u540e\u4f46\u662f\u81ea\u8eab\u6790\u6784\u65f6\u53c8\u5fd8\u8bb0\u6e05\u9664\u4e86\u3002\u627e\u6765\u627e\u53bb\u5e76\u6ca1\u6709\u5934\u7eea\uff0c\u534a\u653e\u5f03\u72b6\u6001\u4e86\u3002\u6700\u540e\u8fd8\u662f\u627e\u9886\u5bfc\u4e00\u8d77\u7814\u7a76\u4e86\u4e00\u4f1a\u7136\u540e\u70b9\u9192\u4e86\u6211\uff1a\u6709\u53ef\u80fd\u662f ipc_server \u7c7b\u81ea\u5df1\u6790\u6784\u4e86\uff0c\u7136\u540e\u901a\u8fc7 vector.end() \u4f5c\u4e3a\u7ec8\u6b62\u6761\u4ef6\u7684 for \u5faa\u73af\u5c31\u4f1a\u8d8a\u754c\uff0c\u8d8a\u754c\u540e\u90a3\u8fed\u4ee3\u5668\u62ff\u7740\u7684\u53ef\u4e0d\u5c31\u662f\u4e00\u4e2a\u201c\u91ce\u6307\u9488\u201d\u4e48\u3002\u770b\u6765\u6211\u7684\u601d\u7ef4\u8fd8\u662f\u4e0d\u591f\u5f00\u9614\uff0c\u6709\u4e9b\u50f5\u5316\u4e86\u3002
\n\u4e0d\u8fc7 iOS \u4e0a\u76f8\u5e94\u529f\u80fd\u8fd8\u5728\u5f00\u53d1\uff0c\u6240\u4ee5\u5f88\u53ef\u60dc\u8ddf\u4e0a\u9762 Mac \u90a3\u4e2a\u6790\u6784\u5e76\u4e0d\u662f\u540c\u4e00\u4e2a\u539f\u56e0\u3002
\nipc \u901a\u5e38\u6709\u4e00\u4e2a ipc_server \u548c ipc_client\uff0c\u4f7f\u7528\u7684\u7ed3\u6784\u5c31\u662f\u5e38\u89c1\u7684\u751f\u4ea7\u8005\u6d88\u8d39\u8005\u6a21\u578b\uff0c\u5404\u81ea\u4f1a\u6709\u4e00\u4e2a HeartBeat() \u5b9a\u671f\u4ece\u961f\u5217\u91cc\u53d6\u51fa\u6570\u636e\u5904\u7406\u3002\u4f46 iOS \u4e0a\u6709\u4e2a\u95ee\u9898\uff0c\u5b83\u4eec\u4f1a\u7acb\u5373\u89e6\u53d1\u4e00\u6b21 HeartBeat() \u4ee5\u52a0\u901f\u6d88\u606f\u7684\u5904\u7406\uff0c\u56e0\u4e3a\u5b9e\u9645\u4e0a\u662f\u540c\u4e00\u4e2a\u8fdb\u7a0b\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u7b49\u5f85\u4e0b\u4e00\u6b21\u5fc3\u8df3\u800c\u7acb\u5373\u5904\u7406\u6d88\u606f\u3002\u6bd4\u5982\u6709\u8fd9\u6837\u4e00\u4e2a Flush() \u51fd\u6570\uff0c\u91cc\u9762\u5148\u540e\u8c03\u7528\u4e00\u6b21 ipc_client \u548c ipc_server \u7684 HeartBeat() \u51fd\u6570<\/p>\n

\r\nvoid T::HeartBeat() {\r\n  \/\/ ... other codes\r\n  for (auto it = handers.begin(); it != handers.end(); ++it) {\r\n    if (*it) (*it)->HandleXXX(...);\r\n  }\r\n}\r\n\r\nvoid Flush() {\r\n  if (ipc_client) ipc_client->HeartBeat();\r\n  if (ipc_server) ipc_server->HeartBeat();\r\n}<\/pre>\n
\u8003\u8651\u8fd9\u79cd\u573a\u666f\uff1a<\/p>\n
    \n
  1. \u6709\u6d88\u606f\u4ece ipc_client \u53d1\u5230 ipc_server<\/li>\n
  2. \u5e38\u89c4\u89e6\u53d1\uff08\u6bd4\u5982\u901a\u8fc7 idle \u5faa\u73af\u6216\u5b9a\u65f6\u5668\u7b49\uff09 ipc_server \u7684 HeartBeat() \u51fd\u6570\uff0c\u5904\u7406\u961f\u5217\u91cc\u7684\u6d88\u606f<\/li>\n
  3. \u4e0a\u4e00\u6b65\u7684\u64cd\u4f5c\u53ef\u80fd\u4f1a\u53d1\u9001\u4e00\u4e9b\u65b0\u7684\u6d88\u606f\u5230 ipc_client \u961f\u5217\u4e2d<\/li>\n
  4. \u8c03\u7528 Flush() \u89e6\u53d1\u4e24\u4e2a HeartBeat()\uff0c\u5904\u7406\u6d88\u606f\n
      \n
    1. ipc_client \u7684 HeartBeat() \u5904\u7406\u6536\u5230\u7684\u6d88\u606f\uff0c\u5904\u7406\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u4e5f\u4f1a\u53d1\u4e00\u4e9b\u6d88\u606f\u5230 ipc_server<\/li>\n
    2. ipc_client \u7684 HeartBeat() \u8fd4\u56de\uff0c\u8fdb\u5165 ipc_server \u7684 HeartBeat()\uff0c\u5904\u7406\u961f\u5217\u4e2d\u7684\u6d88\u606f\uff0c\u5904\u7406\u8fc7\u7a0b\u4e2d\u53c8\u5f80 ipc_client \u53d1\u6d88\u606f\uff0c\u90e8\u5206\u6d88\u606f\u53d1\u9001\u4e4b\u540e\u53c8\u4f1a\u7acb\u5373\u8c03\u7528 Flush()<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n
      \u4ece\u7b2c 4 \u6b65\u5f00\u59cb\u5c31\u6709 HeartBeat() \u91cd\u5165\u7684\u60c5\u51b5\u4e86\u3002
      \nHeartBeat() \u4ee3\u7801\u4e2d\u5904\u7406 ipc \u6d88\u606f\u5c31\u662f for \u5faa\u73af\u904d\u5386 handler \u7684 vector\uff0c\u5b9e\u9645\u4f7f\u7528\u4e2d handler \u4f1a\u5728\u67d0\u4e00\u4e9b\u56de\u8c03\u51fd\u6570\u91cc\u7ee7\u7eed\u589e\u52a0\u5220\u9664\u5176\u4ed6 handlers\uff0c\u800c\u6211\u4eec\u53c8\u77e5\u9053 vector \u7684 push_back \u53ef\u80fd\u4f1a\u9020\u6210\u8fed\u4ee3\u5668\u5931\u6548\uff0c\u90a3\u4e48\u5f53\u524d handler \u8fd4\u56de\u540e\u8fed\u4ee3\u5668 ++ \u65f6\u5c31\u53ef\u80fd\u4f1a\u6302\u6389\u3002
      \n\u4e4b\u524d\u4e3a\u4e86\u907f\u514d\u8fd9\u4e2a\u95ee\u9898\u6211\u4eec\u7b80\u5355\u5730\u5c06 vector reverse \u4e86\u76f8\u5bf9\u5927\u7684\u6570\u91cf\uff0c\u540c\u65f6\u79fb\u9664 handler \u65f6\u53ea\u628a\u6307\u9488\u7f6e\u7a7a\uff0c\u4e0d\u4ece vector \u91cc erase\u3002erase \u64cd\u4f5c\u5ef6\u8fdf\u5230 HeartBeat() \u51fd\u6570\u8fd4\u56de\u4e4b\u524d\u8fdb\u884c\u3002
      \n\u800c\u73b0\u5728 iOS \u4e0a\u901a\u8fc7 Flush() \u51fd\u6570\u8ba9 HeartBeat() \u91cc\u4e5f\u5d4c\u5957\u8c03\u7528\u4e86 HeartBeat()\uff0c\u90a3\u4e48\u5f53\u540e\u4e00\u4e2a HeartBeat() \u4e2d\u6ee1\u8db3\u6761\u4ef6 erase \u6307\u9488\u51cf\u5c0f\u4e86 vector \u7684 size\uff0c\u4e4b\u540e\u51fd\u6570\u8fd4\u56de\uff0c\u524d\u9762\u4e00\u4e2a\u5faa\u73af\u4e2d\u7684\u8fed\u4ee3\u5668\u504f\u79fb\u53ef\u80fd\u5c31\u8d85\u51fa\u4e86 end() \u7684\u4f4d\u7f6e\uff0c\u4e5f\u5c31\u4f1a\u8bbf\u95ee\u8d8a\u754c\uff0c\u91cc\u9762\u7684\u6570\u636e\u81ea\u7136\u5c31\u662f\u4e00\u4e2a\u201c\u91ce\u6307\u9488\u201d\u4e86\u3002
      \n\u6bd4\u5982 vector \u91cc\u6709 10 \u4e2a\u5143\u7d20\uff0c\u5f53\u524d\u5faa\u73af\u5230\u7b2c 6 \u4e2a\uff0c\u4e2d\u9014\u89e6\u53d1 erase \u628a\u5143\u7d20\u5220\u5230\u5269 3 \u4e2a\uff0c\u7136\u540e it != vec.end() \u5224\u65ad\u65e0\u6cd5\u7ec8\u6b62\u5faa\u73af\uff0c\u56e0\u4e3a it \u5df2\u7ecf\u5927\u4e8e end() \u4e86\u3002
      \n\"crash-poc\"<\/a><\/p>\n
      framework \u505a\u56de\u8c03\u901a\u77e5\u65f6\u8fd8\u662f\u9700\u8981\u7559\u610f\uff0c\u8c01\u4e5f\u4e0d\u77e5\u9053\u5176\u4ed6\u6a21\u5757\u4f1a\u5728\u8fd9\u4e9b\u56de\u8c03\u51fd\u6570\u91cc\u5199\u4e86\u4ec0\u4e48\u4ee3\u7801\uff0c\u751a\u81f3\u5728\u56de\u8c03\u91cc\u5220\u9664 framework \u5bf9\u8c61\u7684\u4e5f\u6709\u3002<\/p>\n
      2024.Q3 \u6a21\u677f\u5b9a\u4e49\u4e0d\u540c\u5bfc\u81f4\u8bbf\u95ee\u504f\u79fb\u9519\u8bef<\/h3>\n
      \u67d0\u4e00\u5929\u53d1\u73b0 app \u7684\u65b0\u5305\u542f\u52a8\u5c31 crash\uff0c\u5206\u6790 dump \u53d1\u73b0\u6302\u4e86\u7ed9\u67d0\u4e2a\u7c7b\u8bbe\u7f6e callback \u6307\u9488\u7684\u5730\u65b9\u3002\u4f46\u662f\u5374\u5f88\u5947\u602a\uff0c\u6c47\u7f16\u91cc\u770b\u5230\u8bbe\u7f6e\u6307\u9488\u7684\u76ee\u6807\u5730\u5740\u504f\u79fb\u5374\u662f\u9519\u7684\u3002\u4ee3\u7801\u4e2d\u8bbe\u7f6e\u7684\u504f\u79fb\u662f this+234 byte\uff0c\u4f46\u662f\u7528 dt \u547d\u4ee4\u67e5\u770b\u8be5\u7c7b\u7684 callback \u6210\u5458\u5b9e\u9645\u4e0a\u662f\u4f4d\u4e8e this+264 byte\u3002\u56e0\u4e3a\u8fd9\u4e2a callback \u662f\u81ea\u5e26\u5f15\u7528\u8ba1\u6570\u7684\uff0c\u90a3\u4e48\u5f53 234 byte \u4f4d\u7f6e\u4e0a\u6570\u636e\u662f\u975e 0\uff0c\u8bbe\u7f6e\u4e0d\u540c\u6307\u9488\u65f6\u5c31\u4f1a\u81ea\u52a8\u5bf9\u201c\u539f\u6307\u9488\u201d\u51cf\u5f15\u7528\u8ba1\u6570\uff0c\u800c\u5b9e\u9645 234 byte \u4e0a\u7684\u6570\u636e\u6839\u672c\u4e0d\u662f\u5408\u6cd5\u7684\u6307\u9488\uff0c\u90a3\u4e48\u81ea\u7136\u4e5f\u5c31\u4f1a\u5bfc\u81f4 crash \u4e86\u3002
      \n\u63a5\u4e0b\u6765\u4e3b\u8981\u5c31\u770b\u4e3a\u4ec0\u4e48\u4f1a\u7f16\u8bd1\u51fa\u6765\u4f1a\u6709\u504f\u79fb\u9519\u8bef\u7684\u60c5\u51b5\u4e86\u3002\u8fd9\u4e2a\u5176\u5b9e\u8ddf\u8de8\u6a21\u5757\u8bbf\u95ee\u5bf9\u8c61\u7684\u60c5\u51b5\u633a\u50cf\uff0c\u4e3e\u4f8b\u8bf4\u6a21\u5757 A \u7684\u5de5\u5382\u51fd\u6570\u751f\u4ea7\u5bf9\u8c61 A\uff0c\u5b83\u7528\u4e86\u5982\u4e0b\u7684\u65b0\u5b9a\u4e49\uff0c<\/p>\n
      \r\nstruct SA {\r\n  int i1[10];\r\n  int i2;\r\n  int i3;\r\n}\r\n<\/pre>\n
      \u800c\u6a21\u5757 B \u5305\u542b\u4e86\u6a21\u5757 A \u8001\u7248\u672c\u7684\u5934\u6587\u4ef6\uff0c\u91cc\u9762\u7684\u5b9a\u4e49\u662f<\/p>\n
      \r\nstruct SA {\r\n  int i1[6];\r\n  int i2;\r\n  int i3;\r\n}\r\n<\/pre>\n
      \u90a3\u4e48\u5f53 B \u548c\u65b0\u7248\u672c\u7684 A \u4e00\u8d77\u8fd0\u884c\uff0cB \u8bbf\u95ee\u7684 i3<\/q> \u5b9e\u9645\u4e0a\u662f i1[7]<\/q>\uff0c\u90a3\u81ea\u7136\u5c31\u4f1a\u6709\u95ee\u9898\u3002
      \n\u800c\u8fd9\u6b21\u4e0d\u4ec5\u4ec5\u662f\u8de8\u6a21\u5757\uff0c\u5728\u540c\u4e00\u6a21\u5757\u5185\u90e8\u4e5f\u4f1a\u53d1\u751f\u8fd9\u79cd\u73b0\u8c61\uff0c\u4e0b\u9762\u6765\u770b\u8fd9\u6bb5\u4ee3\u7801\uff0c\u5b83\u4eec\u5404\u81ea\u5199\u5728\u4e0d\u540c\u7684 .cpp \u548c .h \u91cc\u3002<\/p>\n
      \r\n\/\/ vvv header1.h vvv\r\n#ifndef HEADER_H_\r\n#define HEADER_H_\r\n#include <string>\r\ntemplate<typename... Args>\r\nstruct TestTemplate {\r\n  int i1{1};\r\n  int i2{2};\r\n  std::string s1;\r\n  int i3{3};\r\n};\r\n#endif\r\n\/\/ ^^^ header1.h ^^^\r\n\r\n\r\n\/\/ vvv header2.h vvv\r\n#ifndef HEADER_H_\r\n#define HEADER_H_\r\ntemplate<typename... Args>\r\nstruct TestTemplate {\r\n  char i1{1};\r\n  char i2{2};\r\n};\r\n#endif\r\n\/\/ ^^^ header2.h ^^^\r\n\r\n\r\n\/\/ vvv src2.h vvv\r\n#pragma once\r\n#include "header2.h"\r\nstruct Wrap {\r\n  TestTemplate<int> member;\r\n};\r\nWrap* CreateTestTemplate();\r\n\/\/ ^^^ src2.h ^^^\r\n\r\n\r\n\/\/ vvv src2.cpp vvv\r\n#include "src2.h"\r\nWrap* CreateTestTemplate() {\r\n  return new Wrap();\r\n}\r\n\/\/ ^^^ src2.cpp ^^^\r\n\r\n\r\n\/\/ vvv src1.cpp vvv\r\n#include "header1.h"\r\n#include "src2.h"\r\nint main() {\r\n  TestTemplate<std::string> s1;\r\n  Wrap* s2 = CreateTestTemplate();\r\n  s2->member.i3 = 33;  \/\/ memory corruption\r\n  return 0;\r\n}\r\n\/\/ ^^^ src1.cpp ^^^\r\n<\/pre>\n
      \u5173\u952e\u5c31\u5728\u5b83\u4eec\u7528\u4e86\u76f8\u540c\u7684 include guard\uff0c\u56e0\u4e3a main \u51fd\u6570\u4e2d\u7684 s2 \u662f\u5728 src2.cpp \u4e2d\u4ee5 header2 \u7684\u5b9a\u4e49\u521b\u5efa\uff0c\u800c\u5728 main \u51fd\u6570\u91cc\u5374\u6309\u7167 header1 \u7684\u65b9\u5f0f\u53bb\u8bbf\u95ee\uff0c\u90a3\u5c31\u4f1a\u5bfc\u81f4\u8bbf\u95ee\u5230\u9519\u8bef\u7684\u5730\u5740\u3002
      \n      \"\"<\/a>
      \n\u8fd9\u4e2a\u95ee\u9898\u5b9e\u9645\u4e0a\u662f\u6211\u4eec\u4ee3\u7801\u4ed3\u5e93\u91cc\u5728\u53e6\u4e00\u4e2a\u8def\u5f84\u4e2d\u85cf\u4e86\u4e00\u4efd\u8001\u7248\u672c\u7684\u5b9e\u73b0\u4e00\u76f4\u6ca1\u6709\u5220\uff0c\u7136\u540e\u5176\u4ed6\u540c\u4e8b\u5728\u6539\u4ee3\u7801\u8fc7\u7a0b\u4e2d\u5076\u7136\u4f7f\u5176\u4ed6 cpp \u5305\u542b\u5230\u4e86\u8fd9\u4e2a\u5934\u6587\u4ef6\uff0c\u6700\u540e\u5f62\u6210\u4e86\u793a\u4f8b\u4ee3\u7801\u4e2d\u7684\u5c40\u9762\uff0c\u597d\u5728\u95ee\u9898\u5f88\u5bb9\u6613\u590d\u73b0\uff0c\u6240\u4ee5\u67e5\u8d77\u6765\u8fd8\u662f\u7701\u529b\u7684\u3002
      \n\u5176\u5b9e\u4e0d\u5199\u8fd9\u4e2a include guard\uff0c\u76f4\u63a5\u7528 #pragma once<\/q> \u5c31\u884c\uff0c\u7f16\u8bd1\u5668\u7f16\u8bd1\u65f6\u5c31\u4f1a\u76f4\u63a5\u62a5\u7b26\u53f7\u91cd\u5b9a\u4e49\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u60f3\u7740\u8bb0\u5f55\u4e00\u4e0b\u5e73\u65f6\u5206\u6790\u8fc7\u7684 crash dump\uff0c\u4f5c\u4e3a\u4e00\u4e2a\u603b\u7ed3\u548c\u53c2\u8003\u3002\u4e0d\u8fc7\u56e0\u4e3a\u6d89\u53ca\u5230\u516c\u53f8\u4ee3\u7801\uff0c\u6240\u4ee5\u4e00\u4e9b\u7ec6\u8282\u6ca1\u6cd5\u63cf… <\/p>\n
      \u9605\u8bfb\u66f4\u591a<\/i><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[230],"class_list":["post-2088","post","type-post","status-publish","format-standard","hentry","category-debug","tag-crash"],"_links":{"self":[{"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/posts\/2088","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/comments?post=2088"}],"version-history":[{"count":9,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/posts\/2088\/revisions"}],"predecessor-version":[{"id":2102,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/posts\/2088\/revisions\/2102"}],"wp:attachment":[{"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/media?parent=2088"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/categories?post=2088"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/tags?post=2088"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}