{"id":1052,"date":"2025-05-05T14:03:04","date_gmt":"2025-05-05T06:03:04","guid":{"rendered":"https:\/\/eve2333.top\/?p=1052"},"modified":"2025-05-05T14:03:05","modified_gmt":"2025-05-05T06:03:05","slug":"%e5%ad%a6%e4%b9%a0%ef%bc%9a%e5%8a%a8%e6%80%81%e9%93%be%e6%8e%a5%e5%ba%93%e7%9a%84%e5%ae%9e%e7%8e%b0%e5%8e%9f%e7%90%86%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/eve2333.top\/?p=1052","title":{"rendered":"\u5b66\u4e60\uff1a\u52a8\u6001\u94fe\u63a5\u5e93\u7684\u5b9e\u73b0\u539f\u7406\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"\n

\u611f\u8c22\u4f5c\u8005\u7801\u519c\u7684\u8352\u5c9b\u6c42\u751f\uff0c\u9644\u5b66\u4e60\u5730\u5740\uff1a\u52a8\u6001\u94fe\u63a5\u5e93\u7684\u5b9e\u73b0\u539f\u7406\u662f\u4ec0\u4e48\uff1f<\/a><\/p>\n\n\n\n

\u5047\u8bbe\u6709\u8fd9\u6837\u4e24\u6bb5\u4ee3\u7801\uff0c\u7b2c\u4e00\u6bb5\u4ee3\u7801\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5168\u91cf\u53d8\u91cfa\u4ee5\u53ca\u51fd\u6570foo\uff0c\u51fd\u6570foo\u4e2d\u5f15\u7528\u4e86\u4e0b\u4e00\u6bb5\u4ee3\u7801\u4e2d\u5b9a\u4e49\u7684\u5168\u5c40\u53d8\u91cfb\u3002<\/p>\n\n\n\n

int a = 1;\nint foo(\uff09{\n    return b + 1;\n}\n\nint b = 2;\nint main(\uff09{\n    int c;\n    c = foo();\n}<\/code><\/pre>\n\n\n\n
\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u6ce8\u610f\u770b\u7b2c\u4e00\u6bb5\u4ee3\u7801\uff0c\u8fd9\u91cc\u5f15\u7528\u4e86\u4e00\u4e2a\u5176\u5b83\u6a21\u5757\u5b9a\u4e49\u7684\u5168\u5c40\u53d8\u91cfb\uff0c\u8fd9\u4e00\u4fe1\u606f\u8bb0\u5f55\u5728\u7b2c\u4e00\u4e2a\u76ee\u6807\u6587\u4ef6\uff0c\u7b2c\u4e8c\u6bb5\u4ee3\u7801\u5f15\u7528\u4e86\u5176\u5b83\u6a21\u5757\u5b9a\u4e49\u7684\u51fd\u6570foo\uff0c\u8fd9\u4e00\u4fe1\u606f\u8bb0\u5f55\u5728\u7b2c\u4e8c\u4e2a\u76ee\u6807\u6587\u4ef6\u3002<\/p>\n\n\n\n
\u6ce8\u610f\u770b\u7b2c\u4e00\u6bb5\u4ee3\u7801\uff0c\u8fd9\u91cc\u5b9a\u4e00\u4e2a\u5168\u5c40\u53d8\u91cfa\u548c\u51fd\u6570foo\uff0c\u6211\u4eec\u8bb0\u5f55\u4e0b\u6765\uff0c\u7b2c\u4e8c\u6bb5\u4ee3\u7801\u5b9a\u4e49\u4e86\u5168\u5c40\u53d8\u91cfb\u548c\u51fd\u6570main\uff0c\u540c\u6837\u8bb0\u5f55\u4e0b\u6765\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u63a5\u7740\u6211\u4eec\u5f00\u59cb\u4e00\u4e2a\u53eb\u505a\u8fde\u8fde\u770b\u7684\u6e38\u620f\u3002<\/p>\n\n\n\n
\u7b2c\u4e00\u4e2a\u6a21\u5757\u5f15\u7528\u4e86\u53d8\u91cfb\uff0c\u53d8\u91cfb\u7684\u5b9a\u4e49\u53ef\u4ee5\u5728\u7b2c\u4e8c\u4e2a\u6a21\u5757\u627e\u5230\u3002<\/p>\n\n\n\n
\u7b2c\u4e8c\u4e2a\u6a21\u5757\u5f15\u7528\u4e86\u51fd\u6570foo\uff0cfoo\u7684\u5b9a\u4e49\u53ef\u4ee5\u5728\u7b2c\u4e00\u4e2a\u6a21\u5757\u627e\u5230\u3002<\/p>\n\n\n\n
\u8fd9\u4e2a\u8fc7\u7a0b\u53eb\u505a\u7b26\u53f7\u89e3\u6790\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u8fd9\u91cc\u770b\u5230\u7684\u5f15\u7528\u4ee5\u53ca\u5b9a\u4e49\u7684\u7b26\u53f7\u4fdd\u5b58\u5728\u6240\u8c13\u7684\u7b26\u53f7\u8868\u4e2d\u3002<\/p>\n\n\n\n
\u800c\u5982\u679c\u7b2c\u4e8c\u4e2a\u6a21\u5757\u5f15\u7528\u4e86\u4e00\u4e2a\u53eb\u505abar\u7684\u53d8\u91cf\uff0c\u94fe\u63a5\u5668\u7ffb\u904d\u6240\u6709\u5176\u5b83\u6a21\u5757\u90fd\u6ca1\u627e\u5230bar\u8fd9\u4e2a\u7b26\u53f7\u7684\u5b9a\u4e49\uff0c\u800c\u53ea\u627e\u5230\u4e86\u4e00\u4e2a\u53eb\u505afoo\u7684\u5b9a\u4e49\uff0c\u8fd9\u65f6\u94fe\u63a5\u5668\u5c31\u4f1a\u62a5\u4e00\u4e2a\u53eb\u505a\u7b26\u5408\u672a\u5b9a\u4e49\u7684\u9519\u8bef\uff0c\u8fd9\u4e2a\u9519\u8bef\u5199c\/c++\u7684\u7a0b\u5e8f\u5458\u4e00\u5b9a\u4e0d\u964c\u751f\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u63a5\u4e0b\u6765\u94fe\u63a5\u5668\u4f1a\u628a\u6570\u636e\u6bb5\u5408\u5e76\u5230\u4e00\u8d77\uff0c\u4ee3\u7801\u6bb5\u5408\u5e76\u5230\u4e00\u8d77\u5e76\u786e\u5b9a\u7b26\u53f7\u7684\u5185\u5b58\u5730\u5740\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u53eb\u505a\u91cd\u5b9a\u4f4d\u3002<\/p>\n\n\n\n
\u4e86\u89e3\u4e86\u8fd9\u4e9b\u5c31\u53ef\u4ee5\u5f00\u59cb\u8bb2\u52a8\u6001\u5e93\u7684\u5b9e\u73b0\u539f\u7406\u4e86\uff0c\u52a8\u6001\u5e93\u53c8\u53eb\u505a\u5171\u4eab\u5e93\uff0c\u6211\u4eec\u7684\u95ee\u9898\u662f\uff0c\u52a8\u6001\u5e93\u662f\u600e\u4e48\u5b9e\u73b0\u53ef\u4ee5\u88ab\u7a0b\u5e8f\u4e4b\u95f4\u5171\u4eab\u7684\u5462\uff1f<\/p>\n\n\n\n
\u5047\u8bbe\u73b0\u5728\u6709\u4e24\u4e2a\u8fd0\u884c\u7684\u7a0b\u5e8f\u548c\u4e00\u4e2a\u52a8\u6001\u5e93liba. so\uff0c\u52a8\u6001\u5e93\u4e2d\u5b9a\u4e86\u4e00\u4e2a\u5168\u5c40\u53d8\u91cfa\uff0c\u7b2c\u4e00\u4e2a\u7a0b\u5e8f\u628a\u53d8\u91cfa\u4fee\u6539\u4e3a\u4e8610\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u7136\u540e\u7b2c\u4e8c\u4e2a\u7a0b\u5e8f\u5f00\u59cb\u8fd0\u884c\uff0c\u7b2c\u4e8c\u4e2a\u7a0b\u5e8f\u4e5f\u4f7f\u7528\u8be5\u52a8\u6001\u5e93\uff0c\u7136\u540e\u628a\u5168\u5c40\u53d8\u91cfa\u4fee\u6539\u4e3a\u4e8620\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u8fd9\u662f\u7b2c\u4e00\u4e2a\u7a0b\u5e8f\u8fd0\u884c\u4e00\u6bb5\u65f6\u95f4\u540e\u51b3\u5b9a\u6253\u5370\u53d8\u91cfa\uff0c\u8fd9\u65f6\u4f60\u4f1a\u60ca\u8bb6\u7684\u53d1\u73b0\u53d8\u91cfa\u4ece10\u53d8\u6210\u4e8620\uff0c\u4f46\u662f\u4e3a\u4ec0\u4e48\u3002<\/p>\n\n\n\n
\u539f\u56e0\u5c31\u662f\u8fd9\u4e24\u4e2a\u7a0b\u5e8f\u5171\u4eab\u4e86\u540c\u4e00\u4e2a\u6570\u636e\u6bb5\uff0c\u6240\u4ee5\u4e00\u4e2a\u7a0b\u5e8f\u5bf9\u6570\u636e\u7684\u4fee\u6539\u5bf9\u53e6\u4e00\u4eba\u7a0b\u5e8f\u662f\u53ef\u89c1\u7684\uff0c\u56e0\u6b64\u52a8\u6001\u5e93\u4e2d\u7684\u6570\u636e\u6bb5\u4e0d\u80fd\u5171\u4eab\uff0c\u6bcf\u4e2a\u7a0b\u5e8f\u9700\u8981\u6709\u81ea\u5df1\u7684\u6570\u636e\u6bb5\u3002<\/p>\n\n\n\n
\u73b0\u5728\u6570\u636e\u7684\u95ee\u9898\u89e3\u51b3\u4e86\uff0c\u6211\u4eec\u6765\u770b\u51fd\u6570\u3002<\/p>\n\n\n\n
\u5047\u8bbe\u52a8\u6001\u5e93liba.so\u9700\u8981\u5f15\u7528\u5916\u90e8\u5b9a\u4e49\u7684foo\u51fd\u6570\uff0c\u7531\u4e8e\u7a0b\u5e8f1\u548c\u7a0b\u5e8f2\u90fd\u4f7f\u7528\u4e86\u8be5\u52a8\u6001\u5e93\uff0c\u56e0\u6b64\u5fc5\u987b\u5b9a\u4e49\u51fafoo\u51fd\u6570\u3002<\/p>\n\n\n\n
\u6211\u4eec\u77e5\u9053\u51fd\u6570\u8c03\u7528\u6700\u7ec8\u4f1a\u88ab\u7f16\u8bd1\u5668\u7ffb\u8bd1\u6210call\u673a\u5668\u6307\u4ee4\u540e\u8ddf\u51fd\u6570\u5730\u5740\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u63a5\u4e0b\u6765\u6211\u4eec\u9700\u8981\u89e3\u6790\u51fafoo\u51fd\u6570\u7684\u5730\u5740\u5230\u5e95\u662f\u4ec0\u4e48\uff0c\u8fd9\u5c31\u662f\u521a\u624d\u6211\u4eec\u63d0\u5230\u7684\u91cd\u5b9a\u4f4d\uff0c\u53ea\u4e0d\u8fc7\u52a8\u6001\u5e93\u5c06\u8fd9\u4e00\u8fc7\u7a0b\u63a8\u8fdf\u5230\u4e86\u8fd0\u884c\u65f6\u3002<\/p>\n\n\n\n
\u7531\u4e8e\u7a0b\u5e8f1\u7684foo\u51fd\u6570\u4f4d\u4e8e\u5185\u5b58\u5730\u57400x123\u8fd9\u4e2a\u4f4d\u7f6e\uff0c\u56e0\u6b64\u94fe\u63a5\u5668\u5c06call\u6307\u4ee4\u540e\u7684\u5730\u5740\u4fee\u6b63\u4e3a0x123\u3002<\/p>\n\n\n\n
\u8fd9\u65f6CPU\u6267\u884c\u8fd9\u6761call\u6307\u4ee4\u5c31\u80fd\u6b63\u786e\u7684\u8df3\u8f6c\u5230\u7b2c\u4e00\u4e2a\u7a0b\u5e8f\u7684foo\u51fd\u6570\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u800c\u7b2c\u4e8c\u4e2a\u7a0b\u5e8f\u7684foo\u51fd\u6570\u4e3a\u5185\u5b58\u5730\u57400x456\u8fd9\u4e2a\u4f4d\u7f6e\uff0c\u63a5\u4e0b\u6765\u7b2c\u4e8c\u4e2a\u7a0b\u5e8f\u5f00\u59cb\u8fd0\u884c\uff0cCPU\u5f00\u59cb\u6267\u884cfoo\u51fd\u6570\uff0c\u7531\u4e8e\u7b2c\u4e8c\u4e2a\u7a0b\u5e8f\u7684foo\u51fd\u6570\u57280x456\uff0c\u56e0\u6b64\u6211\u4eec\u5e0c\u671bCPU\u80fd\u8df3\u8f6c\u5230\u8fd9\u91cc\uff0c\u4f46\u7531\u4e8e\u52a8\u6001\u5e93\u4e2dcall\u6307\u4ee4\u540e\u8ddf\u7684\u662f0x123\u8fd9\u4e2a\u5185\u5b58\u5730\u5740\uff0c\u56e0\u6b64CPU\u6267\u884cfoo\u51fd\u6570\u65f6\u4f9d\u7136\u4f1a\u8df3\u8f6c\u5230\u7b2c\u4e00\u4e2a\u7a0b\u5e8f\u7684foo\u51fd\u6570\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u8fd9\u65f6\u7cfb\u7edf\u5c31\u51fa\u73b0\u4e86\u9519\u8bef\u3002<\/p>\n\n\n\n
\u95ee\u9898\u51fa\u5728\u4e86\u54ea\u91cc\u5462\uff1f<\/p>\n\n\n\n
\u4e3b\u8981\u662fcall\u8fd9\u6761\u673a\u5668\u6307\u4ee4\uff0c\u8fd9\u6761\u6307\u4ee4\u540e\u8ddf\u4e86\u4e00\u4e2a\u7edd\u5bf9\u7684\u5185\u5b58\u5730\u5740\uff0c\u800c\u4e0d\u8981\u5fd8\u4e86\uff0c\u8fd9\u6761\u6307\u4ee4\u6216\u8005\u8bf4\u52a8\u6001\u5e93\u662f\u8981\u88ab\u5404\u4e2a\u7a0b\u5e8f\u5171\u4eab\u7684\uff0c\u663e\u7136\u6211\u4eec\u4e0d\u80fd\u76f4\u63a5\u4f7f\u7528\u7edd\u5bf9\u5730\u5740\u3002<\/p>\n\n\n\n
\u8be5\u600e\u4e48\u529e\u5462\uff1f<\/p>\n\n\n\n
\u8ba1\u7b97\u673a\u4e2d\u6240\u6709\u95ee\u9898\u90fd\u53ef\u4ee5\u901a\u8fc7\u589e\u52a0\u4e00\u4e2a\u4e2d\u95f4\u5c42\u6765\u89e3\u51b3\u3002<\/p>\n\n\n\n
call \u4e2d\u95f4\u5c42 0x123<\/strong><\/p>\n\n\n\n
\u8fd9\u6837\u6211\u4eec\u5c31\u6452\u5f03\u4e86\u76f4\u63a5\u8c03\u7528\uff0c\u800c\u91c7\u7528\u95f4\u63a5\u8c03\u7528\u3002<\/p>\n\n\n\n
\u800c\u6211\u4eec\u8fd9\u91cc\u5bf9\u51fd\u6570\u7684\u8ba8\u8bba\u5bf9\u4e8e\u5168\u5c40\u53d8\u91cf\u7684\u5e94\u7528\u4e5f\u662f\u4e00\u6837\u7684\u9053\u7406\uff0c\u5168\u5c40\u53d8\u91cf\u7684\u4f7f\u7528\u4e5f\u5b58\u5728\u540c\u6837\u7684\u95ee\u9898\uff0c\u53ea\u4e0d\u8fc7\u662f\u4ece\u51fd\u6570\u8c03\u7528\u53d8\u6210\u4e86\u5185\u5b58\u8bfb\u5199\uff0c\u89e3\u51b3\u95ee\u9898\u7684\u65b9\u6cd5\u4e00\u6837\uff0c\u6211\u4eec\u4ece\u76f4\u63a5\u5e94\u7528\u6539\u4e3a\u95f4\u63a5\u5f15\u7528\u3002<\/p>\n\n\n\n
\u63a5\u4e0b\u6765\u6211\u4eec\u4f9d\u7136\u4ee5\u51fd\u6570\u8c03\u7528\u4e3a\u4f8b\u6765\u8bb2\u89e3\u3002<\/p>\n\n\n\n
\u90a3\u4e48\u8fd9\u4e2a\u4e2d\u95f4\u5c42\u5230\u5e95\u662f\u4ec0\u4e48\u5462\uff1f<\/p>\n\n\n\n
\u7b54\u6848\u5c31\u662fgot\u3002<\/p>\n\n\n\n
\u8fd8\u8bb0\u5f97\u521a\u624d\u63d0\u5230\u7684\u6bcf\u4e2a\u7a0b\u5e8f\u90fd\u6709\u81ea\u5df1\u7684\u6570\u636e\u533a\u5417\uff0c\u8fd9\u4e2agot\u6bb5\u5c31\u5c5e\u4e8e\u6570\u636e\u533a\u7684\u4e00\u90e8\u5206\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
got\u4e2d\u6709\u4ec0\u4e48\u5462\uff1fgot\u4e2d\u8bb0\u5f55\u4e86\u5f15\u7528\u7684\u5168\u5c40\u53d8\u91cf\u6216\u8005\u51fd\u6570\u7684\u5730\u5740\uff0c\u5728\u7a0b\u5e8f\u8fd0\u884c\u65f6\u94fe\u63a5\u5668\u4f1a\u627e\u5230foo\u7684\u5185\u5b58\u5730\u5740\uff0c\u7136\u540e\u586b\u5230got\u8868\u4e2d\uff0c\u8fd9\u6837\u901a\u8fc7\u67e5got\u8868\u6211\u4eec\u5c31\u80fd\u77e5\u9053\u51fd\u6570foo\u7684\u5185\u5b58\u5730\u5740\u4e86\u3002<\/p>\n\n\n\n
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