\u4fe1\u53f7:(\u95f9\u949f)\u7ea2\u7eff\u706f，\u4e0a\u8bfe\u94c3\u58f0，\u72fc\u70df，\u7535\u8bdd\u94c3\u58f0,\u809a\u5b50\u53eb，\u6572\u95e8\u58f0，\u8138\u8272\u4e0d\u597d\u00a0<\/p>\n<\/p>\n
2.\u4fe1\u53f7\u662f\u7ed9\u8c01\u7684？<\/span><\/p>\n \u4e0a\u9762\u7684\u4fe1\u53f7\u90fd\u662f\u7ed9\u4eba\u7684 ->\u90a3\u4e48\u6b64\u65f6\u7cfb\u7edf\u7684\u4fe1\u53f7\u5c31\u662f\u7ed9\u8fdb\u7a0b\u7684<\/p>\n<\/p>\n 3.\u4fe1\u53f7\u7684\u4f5c\u7528\u662f\u5e72\u561b\u7528\u7684？<\/span><\/p>\n \u4e2d\u65ad\u6211\u4eec\u4eba\u6b63\u5728\u505a\u7684\u4e8b\u60c5，\u662f\u4e00\u79cd\u4e8b\u4ef6\u7684\u5f02\u6b65\u901a\u77e5\u673a\u5236<\/p>\n 1.\u6211\u4eec\u81ea\u4e60\u4e00\u4f1a，\u7b49\u5f20\u4e09\u56de\u6765\u518d\u8bb2，\u6211\u4eec\u7ee7\u7eed\u4e0a\u8bfe，\u4e0a\u8bfe — \u540c\u6b65<\/p>\n 2.\u5f20\u4e09\u53d6\u5feb\u9012–\u5f02\u6b65<\/p>\n<\/p>\n \u4fe1\u53f7\u662f\u4e00\u79cd\u7ed9\u8fdb\u7a0b\u53d1\u9001\u7684，\u7528\u6765\u8fdb\u884c\u4e8b\u4ef6\u5f02\u6b65\u901a\u77e5\u7684\u673a\u5236! \u4fe1\u53f7\u7684\u56db\u4e2a\u57fa\u672c\u7ed3\u8bba：<\/span><\/p>\n 1.\u4fe1\u53f7\u5904\u7406，\u8fdb\u7a0b\u5728\u4fe1\u53f7\u6ca1\u6709\u4ea7\u751f\u7684\u65f6\u5019，\u65e9\u5c31\u77e5\u9053<\/span>\u4fe1\u53f7\u8be5\u5982\u4f55\u5904\u7406\u4e86 kill\u00a0 -l:\u67e5\u770b\u4fe1\u53f7<\/p>\n \u6bcf\u4e2a\u4fe1\u53f7\u90fd\u6709\u7f16\u53f7\u548c\u5b8f\u5b9a\u4e49\u540d\u79f0，\u8fd9\u4e9b\u5b8f\u5b9a\u4e49\u540d\u79f0\u53ef\u4ee5\u5728signal.h\u53ef\u4ee5\u627e\u5230<\/p>\n 62\u7684\u4fe1\u53f7\u53ef\u4ee5\u5927\u81f4\u5206\u6210\u4e24\u90e8\u5206，\u7f16\u53f734\u4ee5\u4e0a\u7684\u90fd\u662f\u5b9e\u65f6\u4fe1\u53f7，\u8fd9\u4e9b\u4fe1\u53f7\u5728\u4ec0\u4e48\u6761\u4ef6\u4e0b\u4ea7\u751f\u7684，\u8fd9\u4e9b\u4fe1\u53f7\u7684\u9ed8\u8ba4\u884c\u4e3a\u662f\u4ec0\u4e48\u53ef\u4ee5\u5728 man 7 signal \u4e2d\u67e5\u770b<\/p>\n \u4fe1\u53f7\u5904\u7406\u53ef\u4ee5\u5206\u6210\u4e09\u79cd：<\/p>\n<\/p>\n 1.\u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c<\/p>\n #include <iostream> void handler(int signumber) int main() sleep(1); \/\/ \u7f16\u8bd1\u8fd0\u884c\u65e5\u5fd7： 2.\u81ea\u5b9a\u4e49\u4fe1\u53f7\u5904\u7406\u52a8\u4f5c<\/p>\n #include <iostream> void handler(int signumber) int main() \/\/ \u7f16\u8bd1\u8fd0\u884c\u65e5\u5fd7\u53ca\u6ce8\u91ca： \/\/ \u6ce8\u91ca\u6389\u7b2c13\u884c（signal\u6ce8\u518c\u4ee3\u7801）\u540e： 3.\u5ffd\u7565\u5904\u7406<\/p>\n #include <iostream><\/p>\n #include <unistd.h> void handler(int signumber) int main() \/\/ \u7f16\u8bd1\u8fd0\u884c\u65e5\u5fd7： \u8981\u4e86\u89e3\u4fe1\u53f7\u7684\u4ea7\u751f，\u9996\u5148\u8981\u7406\u89e3\u8fdb\u7a0b\u7684\u79cd\u7c7b<\/p>\n<\/p>\n \u5148\u8bf4\u7ed3\u8bba：\u8fdb\u7a0b\u5206\u6210\u4e24\u79cd<\/span><\/p>\n 1.\u524d\u53f0\u8fdb\u7a0b：# .\/xxx (\u5728\u542f\u52a8\u7cfb\u7edf\u7684\u65f6\u5019，\u4f1a\u9ed8\u8ba4\u5f00\u542f\u4e00\u4e2a\u8fdb\u7a0bshell\u8fdb\u7a0b，\u9ed8\u8ba4\u662f\u524d\u53f0\u8fdb\u7a0b)<\/p>\n 2.\u540e\u53f0\u8fdb\u7a0b：# .\/xxx &<\/p>\n \u8c08\u8c08\u8fd9\u4e24\u4e2a\u8fdb\u7a0b\u4e4b\u95f4\u7684\u533a\u522b：<\/span><\/p>\n<\/p>\n \u540e\u53f0\u8fdb\u7a0b\u65e0\u6cd5\u4ece\u6807\u51c6\u8f93\u5165（\u952e\u76d8）\u4e2d\u83b7\u53d6\u4fe1\u606f<\/p>\n \u524d\u53f0\u8fdb\u7a0b\u53ef\u4ee5\u4ece\u6807\u51c6\u8f93\u5165（\u952e\u76d8）\u4e2d\u83b7\u53d6\u4fe1\u606f<\/p>\n<\/p>\n \u4e3a\u4ec0\u4e48\u540e\u53f0\u8fdb\u7a0b\u4e0d\u53ef\u4ee5？<\/p>\n \u952e\u76d8\u53ea\u6709\u4e00\u4e2a，\u8f93\u5165\u6570\u636e，\u4e00\u5b9a\u662f\u7ed9\u4e00\u4e2a\u786e\u5b9a\u7684\u8fdb\u7a0b，\u6240\u4ee5\u53ea\u80fd\u7ed9\u524d\u53f0\u8fdb\u7a0b\u53d1\u9001\u6d88\u606f，<\/p>\n \u6240\u4ee5\u524d\u53f0\u8fdb\u7a0b\u53ea\u80fd\u6709\u4e00\u4e2a（\u542f\u52a8shell\u7684\u65f6\u5019，bash\u8fdb\u7a0b\u9ed8\u8ba4\u4e3a\u524d\u53f0\u8fdb\u7a0b），\u540e\u53f0\u8fdb\u7a0b\u53ef\u4ee5\u6709\u591a\u4e2a，\u6240\u4ee5\u524d\u53f0\u8fdb\u7a0b\u7684\u672c\u8d28\u5c31\u662f\u5c31\u662f\u4ece\u4ece\u952e\u76d8\u4e2d\u83b7\u53d6\u6570\u636e\u3002<\/p>\n<\/p>\n \u4f46\u662f\u90fd\u662f\u53ef\u4ee5\u5411\u6807\u51c6\u8f93\u51fa\u4e2d\u6253\u5370\u4fe1\u606f<\/p>\n<\/p>\n \u89c2\u770b\u51e0\u4e2a\u73b0\u8c61：<\/span><\/p>\n 1.\u5f53.\/testing\u7684\u65f6\u5019，testing\u5c31\u662f\u524d\u53f0\u8fdb\u7a0b\u4e86，\u5c31\u628a\u539f\u6709\u7684bash\u8fdb\u7a0b\u7ed9\u6324\u4e0b\u53bb\u4e86，\u4f7f\u7528 \u547d\u4ee4\u884c ls \u7b49\u7b49\u7684，\u4e5f\u5c31\u5e76\u6ca1\u6709\u6548\u679c（\u9a8c\u8bc1\u4e86\u524d\u53f0\u8fdb\u7a0b\u53ea\u80fd\u6709\u4e00\u4e2a\u7684\u7279\u6027）<\/p>\n 2.\u5f53\u6267\u884c\u4ee5\u540e\u53f0\u8fdb\u7a0b\u8fdb\u7a0b\u8fdb\u884c\u6267\u884c\u7684\u65f6\u5019，\u6211\u8f93\u5165\u547d\u4ee4\u884c\u662f\u6709\u53cd\u5e94\u7684（bash\u8fdb\u7a0b）<\/p>\n \u6b64\u65f6\u6211\u4eec\u60f3\u8981\u6740\u6389\u540e\u53f0\u8fdb\u7a0b\u7684\u548c\u5c31\u8981\u91cd\u65b0\u518d\u5f00\u542f\u4ee5Xshell，\u67e5\u8be2\u4ed6\u7684PID，\u5e76\u628a\u5b83\u7ed9\u6740\u6389<\/p>\n 3.\u521b\u5efa\u5b50\u8fdb\u7a0b，\u7236\u8fdb\u7a0b\u5148\u9000\u51fa，\u5b50\u8fdb\u7a0bctrl+c \u65e0\u6cd5\u9000\u51fa（\u50f5\u5c38\u5b64\u513f），\u5c31\u662f\u5b50\u8fdb\u7a0b\u88ab\u81ea\u52a8\u63d0\u5230\u540e\u53f0\u8fdb\u7a0b<\/p>\n \u8865\u5145\u4e00\u7ec4\u5173\u4e8e\u540e\u53f0\u548c\u524d\u53f0\u8fdb\u7a0b\u7684\u6307\u4ee4：<\/span><\/p>\n<\/p>\n \u7b2c\u4e00\u7ec4：<\/span><\/p>\n<\/p>\n jobs\u67e5\u770b\u6240\u6709\u7684\u540e\u53f0\u4efb\u52a1，\u53ef\u4ee5\u770b\u5230 \u5b83\u7684\u4efb\u52a1\u53f7\u4e3a1<\/p>\n \u7b2c\u4e8c\u7ec4：<\/span><\/p>\n<\/p>\n ctr+z:\u8fdb\u7a0b\u5207\u6362\u5230\u540e\u53f0,\u4f7f\u7528jobs\u67e5\u770b\u540e\u53f0\u8fdb\u7a0b<\/p>\n \nbg\u4efb\u52a1\u53f7:\u8ba9\u540e\u53f0\u8fdb\u884c\u56de\u590d\u8fd0\u884c，\u8ba9\u540e\u53f0\u8fdb\u7a0b\u7ee7\u7eed\u8fd0\u884c<\/p>\n \u4ec0\u4e48\u53eb\u505a\u8fdb\u7a0b\u53d1\u9001\u6d88\u606f?<\/p>\n<\/p>\n \u4e4b\u524d\u7684\u4fe1\u53f7\u7684\u4e00\u4e2a\u7279\u6027：\u4fe1\u53f7\u7684\u5904\u7406，\u4e0d\u662f\u7acb\u5373\u5904\u7406，\u800c\u662f\u53ef\u4ee5\u7b49\u4e00\u4f1a\u5728\u5904\u7406，\u5408\u9002\u7684\u65f6\u5019，\u8fdb\u884c\u4fe1\u53f7\u7684\u5904\u7406<\/p>\n<\/p>\n \u6240\u4ee5\u4fe1\u53f7\u4ea7\u751f\u4e4b\u540e，\u5e76\u4e0d\u662f\u7acb\u5373\u5904\u7406\u7684，\u6240\u4ee5\u8981\u6c42，\u8fdb\u7a0b\u5fc5\u987b\u628a\u4fe1\u53f7\u8bb0\u5f55\u4e0b\u6765<\/p>\n<\/p>\n \u8bb0\u5f55\u5728\u54ea\u91cc？<\/p>\n sigs：\u4e5f\u662f\u4e00\u4e2a\u4f4d\u56fe\u7684\u7ed3\u6784<\/p>\n \u6bd4\u7279\u4f4d\u7684\u4f4d\u7f6e，\u4fe1\u53f7\u7f16\u53f7<\/p>\n \u6bd4\u7279\u4f4d\u7684\u5185\u5bb9，\u662f\u5426\u6536\u5230<\/p>\n \u6240\u4ee5\u53d1\u9001\u4fe1\u53f7，\u672c\u8d28\u662f\u5411\u76ee\u6807\u8fdb\u7a0b\u5199\u4fe1\u53f7\u4fee\u6539\u4f4d\u56fe\u00a0 \u6839\u636epid,\u4fe1\u53f7\u7684\u7f16\u53f7<\/p>\n<\/p>\n \u4f4d\u56fe\u5c5e\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u5185\u7684\u6570\u636e\u7ed3\u6784\u5bf9\u8c61 \u6240\u4ee5\u4fee\u6539\u4f4d\u56fe\u672c\u8d28:\u4fee\u6539\u5185\u6838\u7684\u6570\u636e<\/p>\n \n\u4f46\u662f\u4fee\u6539\u5185\u6838\u6570\u636e\u53ea\u80fd\u662f\u64cd\u4f5c\u7cfb\u7edf\u81ea\u5df1，<\/p>\n \u6240\u4ee5\u6700\u540e\u7684\u7ed3\u8bba：\u4e0d\u7ba1\u4fe1\u53f7\u600e\u4e48\u4ea7\u751f，\u53d1\u9001\u4fe1\u53f7，\u5728\u5e95\u5c42，\u5fc5\u987b\u8ba9\u7ed9os\u53d1\u9001<\/span><\/p>\n<\/p>\n \u6240\u4ee5，\u64cd\u4f5c\u7cfb\u7edf\u5fc5\u987b\u63d0\u4f9b\u53d1\u9001\u4fe1\u53f7\u7684\u7cfb\u7edf\u8c03\u7528–kill<\/span><\/p>\n<\/p>\n<\/p>\n Ctrl+C (SIGINT) ：\u7ec8\u6b62\u4e00\u4e2a\u8fdb\u7a0b<\/span><\/p>\n #include <iostream> void handler(int signumber) int main() sleep(1); \/\/ \u7f16\u8bd1\u8fd0\u884c\u65e5\u5fd7： \u00a0<\/span>Ctrl+\\\\（SIGQUIT）\u53ef\u4ee5\u53d1\u9001\u7ec8\u2f4c\u4fe1\u53f7\u5e76\u2f63\u6210core dump\u2f42\u4ef6，<\/span><\/p>\n #include <iostream> void handler(int signumber) int main() \/\/ \u7f16\u8bd1\u8fd0\u884c\u65e5\u5fd7\u53ca\u6ce8\u91ca： \/\/ \u6ce8\u91ca\u6389\u7b2c13\u884c（signal\u6ce8\u518c\u4ee3\u7801）\u540e： Ctrl+Z（SIGTSTP）\u53ef\u4ee5\u53d1\u9001\u505c\u2f4c\u4fe1\u53f7，\u5c06\u5f53\u524d\u524d\u53f0\u8fdb\u7a0b\u6302\u8d77\u5230\u540e\u53f0\u7b49\u3002<\/span><\/p>\n #include <iostream> void handler(int signumber) int main() \/\/ \u7f16\u8bd1\u8fd0\u884c\u65e5\u5fd7\u53ca\u6ce8\u91ca： \/\/ \u6ce8\u91ca\u6389\u7b2c13\u884c（signal\u6ce8\u518c\u4ee3\u7801）\u540e： sig\u4ee3\u7801：<\/p>\n \u4ee5\u540e\u53f0\u8fdb\u7a0b\u8fdb\u884c\u8fd0\u884c：<\/p>\n \u2fb8\u5148\u5728\u540e\u53f0\u6267\u2f8f\u6b7b\u5faa\u73af\u7a0b\u5e8f,\u7136\u540e\u2f64kill\u547d\u4ee4\u7ed9\u5b83\u53d1SIGSEGV\u4fe1\u53f7\u3002 <\/span><\/p>\n \u4ee3\u7801\u793a\u4f8b：\u81ea\u5df1\u5904\u7406kill\u578b\u53f7<\/p>\n #include <iostream> \/\/ .\/mykill signumber pid int n = kill(target, signum); raise <\/span>\u51fd\u6570\u53ef\u4ee5\u7ed9\u5f53\u524d\u8fdb\u7a0b\u53d1\u9001\u6307\u5b9a\u7684\u4fe1\u53f7(\u2f83\u2f30\u7ed9\u2f83\u2f30\u53d1\u4fe1\u53f7)\u3002 <\/span><\/p>\n \u4ee3\u7801\u793a\u4f8b：\u81ea\u5df1\u7ed9\u81ea\u5df1\u53d1\u9001\u578b\u53f7，\u5e76\u81ea\u5b9a\u4e49\u5904\u7406<\/p>\n #include <iostream> void handler(int signumber) \/\/ mykill -signumber pid \/\/ \u7f16\u8bd1\u8fd0\u884c\u65e5\u5fd7： abort <\/span>\u51fd\u6570\u4f7f\u5f53\u524d\u8fdb\u7a0b\u63a5\u6536\u5230\u4fe1\u53f7\u2f7d\u5f02\u5e38\u7ec8\u2f4c\u3002<\/span><\/p>\n \u4ee3\u7801\u793a\u4f8b：<\/p>\n \u5176\u5b9e\u4e5f\u662f\u81ea\u5df1\u7ed9\u81ea\u5df1\u53d1\u4fe1\u53f7，\u4f46\u662f\u6b64\u65f6\u662f\u53d1\u4e00\u4e2a\u56fa\u5b9a\u7684\u4fe1\u53f7，6，\u7528\u4e8e\u7ec8\u6b62<\/p>\n #include <iostream> void handler(int signumber) \/\/ mykill -signumber pid \/\/ \u7f16\u8bd1\u8fd0\u884c\u65e5\u5fd7： \/\/ \u6ce8\u91ca\u6389\u7b2c15\u884c（signal\u6ce8\u518c\u4ee3\u7801）\u540e： \u786c\u4ef6\u5f02\u5e38\u88ab\u786c\u4ef6\u4ee5\u67d0\u79cd\u65b9\u5f0f\u88ab\u786c\u4ef6\u68c0\u6d4b\u5230\u5e76\u901a\u77e5\u5185\u6838,\u7136\u540e\u5185\u6838\u5411\u5f53\u524d\u8fdb\u7a0b\u53d1\u9001\u9002\u5f53\u7684\u4fe1\u53f7\u3002<\/p>\n \u4f8b\u5982\u5f53\u524d\u8fdb\u7a0b\u6267\u884c\u4e86\u9664\u4ee50\u7684\u6307\u4ee4,CPU\u7684\u8fd0\u7b97\u5355\u5143\u4f1a\u4ea7\u751f\u5f02\u5e38,\u5185\u6838\u5c06\u8fd9\u4e2a\u5f02\u5e38\u89e3\u91ca\u4e3aSIGFPE\u4fe1\u53f7\u53d1\u9001\u7ed9\u8fdb\u7a0b\u3002<\/p>\n \u518d\u6bd4\u5982\u5f53\u524d\u8fdb\u7a0b\u8bbf\u95ee\u4e86\u975e\u6cd5\u5185\u5b58\u5730\u5740,MMU\u4f1a\u4ea7\u751f\u5f02\u5e38,\u5185\u6838\u5c06\u8fd9\u4e2a\u5f02\u5e38\u89e3\u91ca\u4e3aSIGSEGV\u4fe1\u53f7\u53d1\u9001\u7ed9\u8fdb\u7a0b\u3002<\/p>\n<\/p>\n 1.\u96640\u64cd\u4f5c<\/p>\n<\/p>\n #include <stdio.h> void handler(int sig) \/\/ vi \/\/ ——————– \u8fd0\u884c\u65e5\u5fd7 ——————– \/\/ \u60c5\u51b52：\u6ce8\u91ca\u7b2c11\u884c（\u672a\u6ce8\u518c\u5904\u7406\u51fd\u6570）： 2.\u91ce\u6307\u9488\u975e\u6cd5\u8bbf\u95ee<\/p>\n #include <stdio.h> void handler(int sig) int main() \/\/ ——————– \u8fd0\u884c\u65e5\u5fd7 ——————– \/\/ \u60c5\u51b52：\u4e0d\u6ce8\u91ca\u7b2c37\u884c（\u6ce8\u518c handler）： \u6b64\u65f6\u7ee7\u7eed\u4ecb\u7ecd\u4e00\u4e2a\u51fd\u6570— \u300b\u300balarm\u95f9\u949f\u548c\u00a0<\/span>SIGALRM <\/span>\u4fe1\u53f7\u3002 <\/span><\/p>\n<\/p>\n \u8c03\u2f64 <\/span>alarm <\/span>\u51fd\u6570\u53ef\u4ee5\u8bbe\u5b9a\u2f00\u4e2a\u95f9\u949f,\u4e5f\u5c31\u662f\u544a\u8bc9\u5185\u6838\u5728 <\/span>seconds <\/span>\u79d2\u4e4b\u540e\u7ed9\u5f53\u524d\u8fdb\u7a0b\u53d1 SIGALRM \u4fe1\u53f7，\u8be5\u4fe1\u53f7\u7684\u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c\u662f\u7ec8\u2f4c\u5f53\u524d\u8fdb\u7a0b\u3002<\/span><\/p>\n 1. IO \u5bc6\u96c6\u578b\u4ee3\u7801<\/p>\n \/\/ IO \u591a int main() 2. CPU \u5bc6\u96c6\u578b + \u4fe1\u53f7\u793a\u4f8b<\/p>\n \/\/ IO \u5c11 int count = 0; int main() \u00a0\u5f53\u524d\u9636\u6bb5：<\/p>\n \n\u00a0<\/p>\n<\/p>\n \u4fdd\u5b58\u4fe1\u53f7\u4e2d\u7684\u76f8\u5173\u7684\u6982\u5ff5：<\/p>\n<\/p>\n 1.\u5b9e\u9645\u6267\u884c\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\u79f0\u4e3a\u4fe1\u53f7\u9012\u8fbe(Delivery) \u6ce8\u610f,\u963b\u585e\u548c\u5ffd\u7565\u662f\u4e0d\u540c\u7684,\u53ea\u8981\u4fe1\u53f7\u88ab\u963b\u585e\u5c31\u4e0d\u4f1a\u9012\u8fbe,\u800c\u5ffd\u7565\u662f\u5728\u9012\u8fbe\u4e4b\u540e\u53ef\u9009\u7684\u4e00\u79cd\u5904\u7406\u52a8\u4f5c\u3002<\/span><\/p>\n<\/p>\n<\/p>\n<\/p>\n \u63a5\u4e0b\u6765\u6211\u4eec\u8981\u4e86\u89e3\u8fd9\u4e09\u5f20\u8868：\u4fdd\u5b58\u4fe1\u53f7\u5c31\u662f\u4f9d\u9760\u8fd9\u4e09\u5f20\u8868\u7ed3\u6784<\/p>\n<\/p>\n \u524d\u63d0：\u8fd9\u4e09\u5f20\u8868\u90fd\u662f\u65e0\u7b26\u53f7\u6574\u6570（unsigned int ），\u4f4d\u56fe\u7684\u7ed3\u6784<\/span><\/p>\n<\/p>\n block\u8868：<\/span><\/p>\n \u6bd4\u7279\u4f4d\u7684\u4f4d\u7f6e:\u8868\u793a\u7684\u662f\u7b2c\u51e0\u4e2a\u4fe1\u53f7<\/p>\n \u6bd4\u7279\u4f4d\u7684\u5185\u5bb9:\u662f\u5426\u963b\u585e!<\/p>\n<\/p>\n penging\u8868：<\/span><\/p>\n \u6bd4\u7279\u4f4d\u7684\u4f4d\u7f6e:\u8868\u793a\u7684\u662f\u7b2c\u51e0\u4e2a\u4fe1\u53f7<\/p>\n \u6bd4\u7279\u4f4d\u7684\u5185\u5bb9:\u662f\u5426\u6536\u5230!<\/p>\n<\/p>\n handler\u8868：\u91cc\u9762\u5b58\u50a8\u7684\u662f\u51fd\u6570\u6307\u9488<\/span><\/p>\n \u6570\u7ec4\u4e0b\u6807：\u4fe1\u53f7\u7f16\u53f7<\/p>\n SIG_DEL：\u9ed8\u8ba4<\/p>\n SIG_IGN:\u5ffd\u7565<\/p>\n （\u6240\u4ee5\u4e4b\u524d\u6211\u4eec\u6355\u6349\u4fe1\u53f7，\u5e76\u5bf9\u4fe1\u53f7\u8fdb\u884c\u81ea\u5b9a\u4e49\u5904\u7406，\u5176\u5b9e\u5c31\u662f\u6539\u53d8handler\u5bf9\u5e94\u4e0b\u6807\u91cc\u9762\u7684\u64cd\u4f5c\u662f \u5ffd\u7565 or \u9ed8\u8ba4 or \u81ea\u5b9a\u4e49）<\/p>\n \u6240\u4ee5\u5904\u7406\u4e00\u4e2a\u4fe1\u53f7\u662f\u770b\u4e09\u5f20\u8868\u7684\u540c\u4e0b\u6807\u4f4d\u7f6e，<\/span><\/p>\n \u5148\u770bpending\u8868：\u770b\u4fe1\u53f7\u662f\u5426\u6536\u5230，\u5982\u679c\u6536\u5230<\/span><\/p>\n \u518d\u770bblock\u8868：\u770b\u4fe1\u53f7\u662f\u5426\u5148\u5b58\u653e\u7740\u8fd8\u662f\u6267\u884c，\u5982\u679c\u4e0d\u963b\u585e<\/span><\/p>\n \u6700\u540e\u770bhandler\u8868：\u662f\u5982\u4f55\u6267\u884c\u8be5\u4fe1\u53f7<\/span><\/p>\n<\/p>\n sigser_t:<\/p>\n<\/p>\n \u60f3\u8981\u4f7f\u7528\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570，\u6240\u4ee5\u8981\u5148\u4e86\u89e3\u4e00\u4e0b\u4fe1\u53f7\u96c6（signal_t）\u7684\u6982\u5ff5：<\/span><\/p>\n \u4ece\u4e0a\u56fe\u6765\u770b,\u6bcf\u4e2a\u4fe1\u53f7\u53ea\u6709\u4e00\u4e2abit\u7684\u672a\u51b3\u6807\u5fd7,\u975e0\u53731,\u4e0d\u8bb0\u5f55\u8be5\u4fe1\u53f7\u4ea7\u751f\u4e86\u591a\u5c11\u6b21,\u963b\u585e\u6807\u5fd7\u4e5f\u662f\u8fd9\u6837\u8868\u793a\u7684\u3002\u56e0\u6b64,\u672a\u51b3\u548c\u963b\u585e\u6807\u5fd7\u53ef\u4ee5\u7528\u76f8\u540c\u7684\u6570\u636e\u7c7b\u578bsigset_t\u6765\u5b58\u50a8,sigpet_t\u79f0\u4e3a\u4fe1\u53f7\u96c6,<\/p>\n \u8fd9\u4e2a\u7c7b\u578b\u53ef\u4ee5\u8868\u793a\u6bcf\u4e2a\u4fe1\u53f7\u7684\u201c\u6709\u6548\u201d\u6216\u201c\u65e0\u6548\u201d\u72b6\u6001,\u5728\u963b\u585e\u4fe1\u53f7\u96c6\u4e2d\u201c\u6709\u6548\u201d\u548c\u201c\u65e0\u6548\u201d\u7684\u542b\u4e49\u662f\u8be5\u4fe1\u53f7\u662f\u5426\u88ab\u963b\u585e,\u800c\u5728\u672a\u51b3\u4fe1\u53f7\u96c6\u4e2d\u201c\u6709 \u6548\u201d\u548c\u201c\u65e0\u6548\u201d\u7684\u542b\u4e49\u662f\u8be5\u4fe1\u53f7\u662f\u5426\u5904\u4e8e\u672a\u51b3\u72b6\u6001\u3002<\/p>\n<\/p>\n 1.sigemptyset<\/p>\n \u529f\u80fd：\u521d\u59cb\u5316\u4fe1\u53f7\u96c6，\u4f7f\u5176\u4e3a\u7a7a（\u4e0d\u5305\u542b\u4efb\u4f55\u4fe1\u53f7）\u3002 2.sigfillset<\/p>\n \u529f\u80fd：\u521d\u59cb\u5316\u4fe1\u53f7\u96c6，\u4f7f\u5176\u5305\u542b\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u4fe1\u53f7（\u5982 SIGINT\u3001SIGTERM \u7b49，\u5177\u4f53\u53d6\u51b3\u4e8e\u7cfb\u7edf）\u3002 3.sigaddset<\/p>\n \u529f\u80fd：\u5411\u4fe1\u53f7\u96c6\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u4fe1\u53f7（signo \u6307\u5b9a\u7684\u4fe1\u53f7\u52a0\u5165\u96c6\u5408）\u3002 4.sigdelset<\/p>\n \u529f\u80fd：\u4ece\u4fe1\u53f7\u96c6\u4e2d\u5220\u9664\u4e00\u4e2a\u4fe1\u53f7（\u79fb\u9664 signo \u6307\u5b9a\u7684\u4fe1\u53f7）\u3002 5.sigismember<\/p>\n \u529f\u80fd：\u68c0\u67e5\u4fe1\u53f7\u662f\u5426\u5728\u96c6\u5408\u4e2d\u3002 3.2.1.sigprocmask<\/p>\n \u7528\u4e8e\u00a0\u4fee\u6539\u8fdb\u7a0b\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57（\u963b\u585e\u4fe1\u53f7\u96c6），\u51b3\u5b9a\u54ea\u4e9b\u4fe1\u53f7\u4f1a\u88ab \u201c\u62e6\u622a\u201d<\/p>\n \u53c2\u6570：<\/p>\n 3.2.2.sigpending<\/p>\n \u7528\u4e8e\u00a0\u83b7\u53d6\u5f53\u524d\u8fdb\u7a0b\u7684\u672a\u51b3\u4fe1\u53f7\u96c6<\/p>\n \u51fd\u6570\u539f\u578b：<\/p>\n \u53c2\u6570：<\/p>\n \u4ee3\u7801\u793a\u4f8b：<\/p>\n \u4e24\u4e2a\u7279\u6027：<\/p>\n 1.9\u53f7\u4fe1\u53f7，\u4e0d\u53ef\u88ab\u6355\u6349，\u4e0d\u53ef\u88ab\u963b\u585e<\/p>\n 2.\u5f53\u6211\u4eec\u51c6\u5907\u9012\u8fbe\u7684\u65f6\u5019，\u8981\u9996\u5148\u6e05\u7a7apending\u4fe1\u53f7\u96c6\u4e2d\u5bf9\u5e94\u7684\u4fe1\u53f7\u4f4d\u56fe 1->0<\/p>\n #include <iostream> using namespace std;<\/p>\n void Pint(sigset_t &pending) int main(){<\/p>\n \/\/1.\u5c4f\u853d2\u53f7\u4fe1\u53f7 \/\/\u8bbe\u7f6e2\u53f7\u4fe1\u53f7 \/\/2.\u83b7\u53d6pending\u4fe1\u53f7 \/\/3.\u6253\u5370pending\u4fe1\u53f7 \u5728\u6b64\u8fd8\u8981\u586b\u5145\u4e4b\u95f4\u7684\u51e0\u4e2a\u5751：<\/p>\n<\/p>\n \u7ec6\u8282\u4e00：<\/span><\/p>\n \u5982\u679c\u5728\u8fdb\u7a0b\u89e3\u9664\u5bf9\u67d0\u4fe1\u53f7\u7684\u963b\u585e\u4e4b\u524d\u8fd9\u79cd\u4fe1\u53f7\u4ea7\u751f\u8fc7\u591a\u6b21,\u5c06\u5982\u4f55\u5904\u7406?<\/p>\n POSIX.1\u5141\u8bb8\u7cfb\u7edf\u9012\u9001\u8be5\u4fe1\u53f7\u4e00\u6b21\u6216\u591a\u6b21\u3002Linux\u662f\u8fd9\u6837\u5b9e\u73b0\u7684:\u5e38\u89c4\u4fe1\u53f7\u5728\u9012\u8fbe\u4e4b\u524d\u4ea7\u751f\u591a\u6b21\u53ea\u8ba1\u4e00\u6b21,\u800c\u5b9e\u65f6\u4fe1\u53f7\u5728\u9012\u8fbe\u4e4b\u524d\u4ea7\u751f\u591a\u6b21\u53ef\u4ee5\u4f9d\u6b21\u653e\u5728\u4e00\u4e2a\u961f\u5217\u91cc\u3002<\/p>\n<\/p>\n<\/p>\n \u7ec6\u8282\u4e8c：corr\u548cterm\u4e4b\u95f4\u7684\u533a\u522b（\u4e24\u8005\u90fd\u662f\u7ec8\u6b62\u4fe1\u53f7）<\/span><\/p>\n<\/p>\n \u7ed3\u8bba：<\/span><\/p>\n core\u7684\u6838\u5fc3\u533a\u522b\u5c31\u662f：\u4f1a\u5728\u5f53\u524d\u8def\u5f84\u4e0b\u5f62\u6210\u4e00\u4e2a\u6587\u4ef6，\u8fdb\u7a0b\u5f02\u5e38\u9000\u51fa\u7684\u65f6\u5019，\u8fdb\u7a0b\u5728\u5185\u5b58\u4e2d\u7684\u6838\u5fc3\u6570\u636e\u4f1a\u5728\u78c1\u76d8\u4e2d\u62f7\u8d1d\u4e00\u4efd，\u5f62\u6210\u4e00\u4e2a\u6587\u4ef6\u3002\u8fd9\u4e2a\u5c31\u53eb\u505a—–\u6838\u5fc3\u8f6c\u50a8<\/span><\/p>\n<\/p>\n \u6838\u5fc3\u8f6c\u50a8\u7684\u76ee\u7684\u5c31\u662f\u652f\u6301debug，<\/span><\/p>\n \u5f00\u542fcore dump,\u76f4\u63a5\u8fd0\u884c\u5d29\u6e83，gdb，core-file core，\u76f4\u63a5\u5e2e\u52a9\u6211\u4eec\u5b9a\u4f4d\u5230\u51fa\u9519\u884c— \u4e8b\u540e\u8c03\u8bd5\u3002<\/span><\/p>\n<\/p>\n \u4e3a\u4ec0\u4e48\u4ece\u6765\u6ca1\u6709\u89c1\u8fc7\u8fd9\u4e2a\u6587\u4ef6？<\/p>\n<\/p>\n \u5728\u4e91\u670d\u52a1\u5668\u4e0acore dump\u8fd9\u4e2a\u529f\u80fd\u662f\u9ed8\u8ba4\u5173\u95ed\u7684\u3002<\/p>\n<\/p>\n \u4e3a\u4ec0\u4e48\u8981\u7981\u7528？<\/p>\n \u8fd8\u4ea7\u751f\u5927\u91cf\u7684core dump \u4f1a\u9020\u6210\u50a8\u5b58\u7684\u6d6a\u8d39<\/p>\n<\/p>\n ulimit -a \u8fdb\u884c\u67e5\u770b<\/p>\n \u73b0\u5728\u6211\u76f4\u63a5\u628a\u4fe1\u53f7\u6355\u6349\u7684\u6d41\u7a0b\u7ed3\u8bba\u7ed9\u6574\u7406\u51fa\u6765：<\/p>\n \u6839\u636e\u4e4b\u524d\u6211\u4eec\u7684\u4e00\u4e2a\u7ed3\u8bba：\u4f1a\u5728\u5408\u9002\u7684\u65f6\u5019\u5904\u7406\u4fe1\u53f7<\/p>\n<\/p>\n 1.\u5728\u4e3b\u51fd\u6570\u4e2d，\u5982\u679c\u6211\u4eec\u9047\u89c1\u4e86\u4e2d\u65ad\u00a0 \u5f02\u5e38，\u6216\u8005\u662f \u7cfb\u7edf\u8c03\u7528，\u4f1a\u8fdb\u884c\u7528\u6237\u5207\u6362，\u4ece\u7528\u6237\u6001-\u300b\u300b\u5185\u6838\u6001\u3002<\/p>\n<\/p>\n 2.\u6b64\u65f6\u6211\u5c31\u5904\u4e8e\u5185\u6838\u6001，\u4f1a\u8fdb\u884c\u4fe1\u53f7\u7684\u68c0\u67e5（do_signal）,\u5982\u4f55\u68c0\u67e5 ？\u67e5\u8be2\u4e0b\u9762\u4e09\u5f20\u8868<\/p>\n \u5148\u770bpending\u8868，\u518d\u770bblock\u8868，\u6700\u540e\u770bhangler\u8868\u5982\u4f55\u5904\u7406：<\/p>\n \u6b64\u65f6\u5c31\u4f1a\u6709\u4e09\u79cd\u60c5\u51b5：<\/p>\n 1.\u5ffd\u7565（SIG_DFL）,\u6b64\u65f6\u53ea\u9700\u5c06pending\u8868\u6539\u62100，\u5728\u5207\u6362\u6210\u7528\u6237\u6001\u6267\u884c\u4e3b\u51fd\u6570\u540e\u9762\u7684\u4ee3\u7801\u3002<\/p>\n<\/p>\n 2.\u9ed8\u8ba4（SIG_DFL）,\u6839\u636e\u7279\u5b9a\u4fe1\u53f7\u7684\u7ea6\u5b9a\u6765\u6267\u884c（\u5927\u90e8\u5206\u9ed8\u8ba4\u52a8\u4f5c\u662f\u7ec8\u6b62），\u6b64\u65f6\u53ea\u9700\u5c06pending\u8868\u6539\u62100，\u5728\u5207\u6362\u6210\u7528\u6237\u6001\u6267\u884c\u4e3b\u51fd\u6570\u540e\u9762\u7684\u4ee3\u7801\u3002<\/p>\n<\/p>\n 3.\u81ea\u5b9a\u4e49，\u4f1a\u5148\u5207\u6362\u6210\u7528\u6237\u6001\u6267\u884c\u6211\u4eec\u81ea\u5b9a\u4e49\u7684\u4ee3\u7801，\u6267\u884c\u5b8c\u540e，\u5728\u5207\u6362\u6210\u5185\u6838\u6001，\u5728\u5185\u6838\u7a7a\u95f4\u4e2d，\u518d\u5207\u6362\u6210\u7528\u6237\u6001<\/p>\n<\/p>\n \u62bd\u8c61\u51fa\u6765\u5c31\u662f\u4e0b\u9762\u8fd9\u4e2a\u6d41\u7a0b\u8868：<\/p>\n \u64cd\u4f5c\u7cfb\u7edf\u662f\u5982\u4f55\u77e5\u9053\u952e\u76d8\u4e0a(\u786c\u4ef6)\u53d1\u9001\u6765\u4e86\u6570\u636e？<\/span><\/p>\n \u5176\u5b9ecpu\u7684\u9488\u811a\u4e0e\u8fd9\u4e2a\u786c\u4ef6\u662f\u95f4\u63a5\u76f8\u8fde\u7684，\u5f53\u786c\u4ef6\u7ed9cpu\u53d1\u9001\u5b8c\u6210\u4ee5\u540e，\u4f1a\u8ddfcpu\u8bf4\u6211\u7684\u6570\u636e\u53d1\u9001\u597d\u4e86，\u4f60\u53ef\u4ee5\u8fdb\u884c\u63a5\u53d7\u4e86，\u8fd9\u4e2a\u64cd\u4f5c\u5c31\u53eb\u505a—-\u300b\u300b\u786c\u4ef6\u4e2d\u65ad<\/p>\n \u6240\u4ee5<\/p>\n cpu\u4e0d\u4f1a\u4e0d\u65ad\u5730\u67e5\u770b\u8fd9\u4e2a\u786c\u4ef6\u770b\u5b83\u53d1\u9001\u5b8c\u6ca1，cpu\u4e4b\u540e\u770b\u5185\u5b58\u4e2d\u5730\u6570\u636e，\u4f46\u662f\u770b\u51af\u8bfa\u4f9d\u66fc\u4f53\u7cfb\u8fd9\u4e9b\u786c\u4ef6\u662f\u548ccpu\u6709\u8fde\u63a5\u7684<\/p>\n \u6b64\u65f6\u6211\u4eec\u8981\u5c06\u8bdd\u9898\u5206\u6210\u4e24\u4e2a\u90e8\u5206，\u8fdb\u884c\u8bb2\u89e3：\u786c\u4ef6\u90e8\u5206\u548c\u8f6f\u4ef6\u90e8\u5206<\/p>\n<\/p>\n \u786c\u4ef6\u90e8\u5206：<\/span><\/p>\n \u6709\u4e0a\u9762\u7684\u77e5\u8bc6：\u786c\u4ef6\u548ccpu\u5176\u5b9e\u662f\u95f4\u63a5\u8fde\u63a5\u7684==\u300b\u300b\u4e2d\u65ad\u63a7\u5236\u5668<\/p>\n \u6240\u4ee5\u6b64\u65f6\u7684\u64cd\u4f5c\u6d41\u7a0b：<\/span><\/p>\n 1.\u5916\u90e8\u8bbe\u5907\u8f93\u5165\u5b8c\u6210，\u901a\u8fc7\u7279\u5b9a\u7684\u9488\u811a\u5411\u4e2d\u65ad\u63a7\u5236\u5668\u53d1\u9001\u4e00\u4e2a\u9ad8\u9891\u4fe1\u53f7，\u6b64\u65f6\u4e2d\u65ad\u63a7\u5236\u5668，\u6839\u636e\u662f\u54ea\u4e2a\u9488\u811a\u7ed9\u6211\u53d1\u9001\u7684\u9ad8\u9891\u4fe1\u53f7，\u5224\u65ad\u51fa\u662f\u54ea\u4e2a\u786c\u4ef6\u7ed9\u6211\u53d1\u9001\u7684\u5f62\u6210\u4e00\u4e2a\u4e2d\u65ad\u53f7\u3002<\/p>\n<\/p>\n 2.\u6b64\u65f6\u7684\u4e2d\u65ad\u63a7\u5236\u5668，\u901a\u8fc7\u7279\u5b9a\u7684\u9488\u811a\u5411cpu\u53d1\u9001\u4e00\u4e2a\u9ad8\u9891\u4fe1\u53f7，cpu\u63a5\u53d7\u5230\u4e86\u4fe1\u53f7，\u5c31\u4f1a\u5411\u4e2d\u65ad\u63a7\u5236\u5668\u4e2d\u8bbf\u95ee\u5f62\u6210\u7684\u4e2d\u65ad\u53f7<\/p>\n<\/p>\n 3.\u6839\u636e\u4e2d\u65ad\u53f7，\u5c31\u77e5\u9053\u54ea\u4e00\u4e2a\u5916\u90e8\u8bbe\u5907\u51c6\u5907\u597d\u4e86CPU\u5c31\u77e5\u9053\u4e86!<\/p>\n \u8f6f\u4ef6\u90e8\u5206：<\/span><\/p>\n<\/p>\n \u6b64\u65f6\u786c\u4ef6\u90e8\u5206\u7ed9\u6211\u4eec\u63d0\u4f9b\u4e86\u4e2d\u65ad\u53f7，\u4f46\u662f\u6839\u636e\u4e2d\u65ad\u53f7\u5982\u4f55\u5904\u7406，\u8fd9\u4e2a\u53ea\u80fd\u4ea4\u7ed9\u8f6f\u4ef6\u90e8\u5206\u5904\u7406<\/p>\n<\/p>\n 1.\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u5728\u5185\u90e8\u63d0\u4f9b\u4e00\u5f20\u4e2d\u65ad\u5411\u91cf\u8868（\u5c31\u662f\u4e00\u4e2a\u51fd\u6570\u6307\u9488\u6570\u7ec4）<\/p>\n<\/p>\n 2.cpu\u518d\u6839\u636e\u7ed9\u5b9a\u7684\u4e2d\u65ad\u53f7，\u627e\u5230\u6211\u4eec\u8981\u6267\u884c\u7684\u4e2d\u65ad\u65b9\u6cd5<\/p>\n \u5f53\u6ca1\u6709\u4e2d\u65ad\u5230\u6765\u7684\u65f6\u5019，OS\u5728\u505a\u4ec0\u4e48？<\/span><\/p>\n \u4ec0\u4e48\u90fd\u6ca1\u505a，OS\u662f\u6682\u505c\u7684\u3002<\/p>\n 1.\u6b64\u65f6\u5916\u90e8\u8bbe\u5907\u6709\u4e2a\u53eb\u505a\u65f6\u949f\u6e90\u7684\u4e1c\u897f，\u5b83\u4f1a\u4ee5\u56fa\u5b9a\u7684，\u7279\u5b9a\u7684\u9891\u7387，\u5411CPU\u53d1\u9001\u7279\u5b9a\u7684\u4e2d\u65ad<\/p>\n 2.\u6b64\u65f6cpu\u5c31\u4f1a\u4ee5\u4e00\u5b9a\u7684\u9891\u7387\u6267\u884c\u8fdb\u7a0b\u8c03\u5ea6<\/p>\n 3.\u4f46\u662f\u5982\u679c\u5c06\u65f6\u949f\u6e90\u8bbe\u8ba1\u518d\u5916\u90e8，\u6b64\u65f6\u65f6\u949f\u6e90\u5c31\u4f1a\u4e0d\u65ad\u5730\u548c\u5176\u4ed6\u7684\u5916\u90e8\u8bbe\u5907\u62a2\u593a\u4e2d\u65ad\u53f7，\u4f1a\u964d\u4f4e\u6548\u7387，\u6240\u4ee5\u73b0\u5728\u7684\u65f6\u949f\u6e90\u90fd\u662fcpu\u5d4c\u8bbe\u8ba1\u7684<\/p>\n \u64cd\u4f5c\u7cfb\u7edf\u662f\u4ec0\u4e48?<\/span><\/p>\n \n\u64cd\u4f5c\u7cfb\u7edf，\u5c31\u662f\u57fa\u4e8e\u4e2d\u65ad，\u8fdb\u884c\u5de5\u4f5c\u7684\u8f6f\u4ef6!<\/p>\n<\/p>\n \u65f6\u95f4\u7247\u7684\u6982\u5ff5：<\/span><\/p>\n schedule：\u8fdb\u7a0b\u8c03\u5ea6<\/span><\/p>\n \u65f6\u95f4\u7247\u8017\u5c3d\u4e86，\u5c31\u4f1a\u8fdb\u884c\u8fdb\u7a0b\u7684\u8c03\u5ea6<\/p>\n \u7531\u5916\u90e8\u8bbe\u5907\u89e6\u53d1\u7684，\u4e2d\u65ad\u7cfb\u7edf\u8fd0\u884c\u6d41\u7a0b，\u53eb\u505a\u786c\u4ef6\u4e2d\u65ad，\u6240\u4ee5\u65f6\u949f\u4e2d\u65ad\u4e5f\u662f\u786c\u4ef6\u4e2d\u65ad\u7684\u4e00\u79cd \u5728\u00a0\u8fdb\u7a0b\u4fe1\u53f7\u9886\u57df，\u91ce\u6307\u9488\u8bbf\u95ee\u00a0\u548c\u00a0\u9664\u96f6\u9519\u8bef\u00a0\u65e2\u4e0d\u662f\u4f20\u7edf\u7684\u786c\u4ef6\u4e2d\u65ad，\u4e5f\u4e0d\u662f\u7eaf\u7cb9\u7684\u8f6f\u4e2d\u65ad，\u800c\u662f\u00a0\u201c\u786c\u4ef6\u68c0\u6d4b\u5f02\u5e38 \u2192 \u5185\u6838\u8f6c\u6362\u4e3a\u8f6f\u4e2d\u65ad（\u4fe1\u53f7）\u201d\u00a0\u7684\u8fc7\u7a0b\u3002<\/p>\n<\/p>\n \u5e38\u89c1\u7684\u786c\u4ef6\u5f02\u5e38\u6709：\u96640，\u91ce\u6307\u9488，\u6307\u9488\u91cd\u590d\u91ca\u653e，\u7f3a\u9875\u4e2d\u65ad<\/p>\n<\/p>\n \u4ee5\u9664\u96f6\u5f02\u5e38\u4e3a\u4f8b：<\/span><\/p>\n<\/p>\n 1.\u8fdb\u7a0b\u5728\u6267\u884c\u81ea\u5df1\u7684\u4ee3\u7801\u7684\u65f6\u5019，\u6267\u884c\u5230\u9664\u96f6，cpu\u4e0a\u4f1a\u53d1\u751f\u786c\u4ef6\u4e0a\u7684\u6ea2\u51fa\u3002<\/p>\n<\/p>\n 2.\u4f46\u662f\u6b64\u65f6cpu\u4e0d\u77e5\u9053\u540e\u9762\u8be5\u600e\u4e48\u5904\u7406，\u6240\u4ee5\u5c31\u89c4\u5b9a\u6210\u4e3a\u4e00\u79cd\u6709CPU\u5185\u90e8\u89e6\u53d1\u7684\u4e2d\u65ad\u3002<\/p>\n<\/p>\n 3.\u6b64\u65f6cpu\u5185\u90e8\u5c31\u751f\u6210\u4e00\u4e2a\u7279\u6709\u7684\u4e2d\u65ad\u53f7，\u518d\u53bb\u4e2d\u65ad\u5411\u91cf\u8868\u4e2d，\u53bb\u6267\u884c\u5f02\u5e38\u4e2d\u65ad<\/p>\n CPU\u5185\u90e8，\u81ea\u5df1\u53ef\u4ee5 \u53ef\u4ee5\u8ba9\u8f6f\u4ef6\u89e6\u53d1\u4e2d\u65ad\u5417?<\/span><\/p>\n \n\u5176\u5b9e\u6709\u4e0b\u9762\u4e24\u4e2a（\u4e0d\u540c\u7248\u672c）\u6307\u4ee4\u96c6\u53ef\u4ee5\u8ba9CPU\u901a\u8fc7\u8f6f\u4ef6\u4e3b\u52a8\u4e2d\u65ad<\/p>\n 1.\u800c\u6211\u4eecC\/C++\u4ee3\u7801:\u672c\u8d28\u5c31\u662f\u7f16\u8bd1\u6210\u4e3a\u4e86\u6307\u4ee4\u96c6+\u6570\u636e<\/p>\n<\/p>\n 2.\u6240\u4ee5syscall\u5c31\u4f1a\u8ba9cpu\u5185\u90e8\u8fdb\u884c\u4e2d\u65ad，\u5e76\u751f\u6210\u4e00\u4e2a\u4e2d\u65ad\u5411\u91cf\u8868\u7684\u7f16\u53f7 –80（\u5c31\u76f8\u5f53\u4e8e\u4e4b\u95f4\u786c\u4ef6\u5f02\u5e38\u7684\u6d41\u7a0b）<\/p>\n 3.\u6b64\u65f60x80\u5bf9\u5e94\u7684\u65b9\u6cd5\u5047\u8bbe\u4f1a\u505a\u4e0b\u9762\u51e0\u4ef6\u4e8b<\/p>\n A.\u83b7\u53d6\u7cfb\u7edf\u8c03\u7528\u53f7 n<\/p>\n B.\u8c03\u7528\u7cfb\u7edf\u8c03\u7528\u7684\u65b9\u6cd5<\/p>\n \u4e3a\u4e86\u66f4\u597d\u7684\u7406\u89e3\u4e0a\u9762\u7b2c\u4e09\u6b65\u7684\u6b65\u9aa4\u6211\u4eec\u8981\u4e86\u89e3\u51e0\u7ec4\u6982\u5ff5<\/span><\/p>\n<\/p>\n 1.\u7cfb\u7edf\u8c03\u7528\u8868：\u4ece\u6b64\u5f80\u540e，\u6bcf\u4e00\u4e2a\u7cfb\u7edf\u8c03\u7528，\u90fd\u6709\u4e00\u4e2a\u552f\u4e00\u7684\u4e0b\u6807，\u8fd9\u4e2a\u4e0b\u6807，\u6211\u4eec\u53eb\u505a，\u7cfb\u7edf\u8c03\u7528\u53f7<\/p>\n 2.\u5f53\u6211\u4eec\u8fdb\u884c\u7cfb\u7edf\u8c03\u7528\u7684\u65f6\u5019，\u5177\u4f53\u662f\u600e\u4e48\u8fdb\u5165\u64cd\u4f5c\u7cfb\u7edf？\u5b8c\u6210\u7cfb\u7edf\u8c03\u7528\u8fc7\u7a0b\u7684<\/p>\n<\/p>\n \u4ee5open（）\u65b9\u6cd5\u4e3a\u4f8b，\u7528\u6237\u5c42\u9762\u4f1a\u8fdb\u884c\u4e0b\u9762\u7684\u64cd\u4f5c，\u7ed9\u5b9a\u6307\u5b9a\u7684\u7cfb\u7edf\u8c03\u7528\u53f7\u7ed9cpu\u7684\u5bc4\u5b58\u5668\u4e2d<\/p>\n \u6240\u4ee5\u6b64\u65f6\u6211\u4eec\u4e5f\u53ef\u4ee5\u5f97\u51fa\u4e00\u4e2a\u7ed3\u8bba：<\/span> os\u64cd\u4f5c\u7cfb\u7edf，\u4e0d\u4f1a\u63d0\u4f9b\u4efb\u4f55\u7684\u63a5\u53e3，\u53ea\u4f1a\u63d0\u4f9b\u7cfb\u7edf\u8c03\u7528\u53f7，\u800c\u6240\u8c13\u7684open（），fork（）\u65b9\u6cd5\u53ea\u662f<\/span><\/p>\n \u88abglibc\u7ed9\u5206\u88c5\u800c\u5df2<\/span><\/p>\n<\/p>\n<\/p>\n<\/p>\n \u6b64\u65f6\u7684\u603b\u7ed3\u5c31\u662f\u5bf9\u4e0a\u9762\u8fd9\u5f20\u56fe\u7684\u89e3\u6790：<\/span><\/p>\n<\/p>\n \u524d\u63d0：<\/span><\/p>\n 1.\u4e4b\u524d\u6211\u4eec\u8bb2\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4\u4e0d\u4ec5\u5305\u62ec\u7528\u6237\u533a[0~3]\u8fd8\u5305\u62ec\u5185\u6838\u533a[3~4]，\u6240\u4ee5\u6211\u4eec\u5c31\u53ef\u4ee5\u901a\u8fc7\u7528\u6237\u7684\u9875\u8868\u6620\u5c04\u8bbf\u95ee\u5230\u7528\u6237\u7684\u78c1\u76d8\u6570\u636e，\u901a\u8fc7\u5185\u6838\u7684\u9875\u8868\u6620\u5c04\u5c31\u53ef\u4ee5\u8bbf\u95ee\u5230\u5185\u6838\u7684\u78c1\u76d8\u6570\u636e\u3002<\/p>\n \u7ed3\u8bba：<\/span><\/p>\n 2.\u64cd\u4f5c\u7cfb\u7edf\u4e5f\u662f\u8f6f\u4ef6，\u4e00\u5b9a\u4e5f\u5728\u5185\u5b58\u5f53\u4e2d，\u7cfb\u7edf\u4e2d\u5185\u5b58\u53ea\u6709\u4e00\u4efd，\u6240\u6709\u7684\u8fdb\u7a0b\u5171\u4eab\u3002\u8fd9\u5c31\u610f\u5473\u7740，\u65e0\u8bba\u8fdb\u7a0b\u5982\u4f55\u7684\u8c03\u5ea6，\u6211\u4eec\u7684\u8fdb\u7a0b\u603b\u662f\u80fd\u591f\u627e\u5230\u64cd\u4f5c\u7cfb\u7edf\u3002<\/p>\n \u95ee\u9898： \nOS\u4e3a\u4e86\u4fdd\u62a4\u81ea\u5df1，\u4e0d\u76f8\u4fe1\u4efb\u4f55\u4eba，\u5fc5\u987b\u91c7\u7528\u7cfb\u7edf\u8c03\u7528\u7684\u65b9\u5f0f\u8fdb\u884c\u8bbf\u95ee<\/p>\n \n1.\u7528\u6237\u6001:\u4ee5\u7528\u6237\u8eab\u4efd，\u53ea\u80fd\u8bbf\u95ee\u81ea\u5df1\u7684[0,3GB]<\/p>\n 2.\u5185\u6838\u6001:\u4ee5\u5185\u6838\u7684\u8eab\u4efd，\u8fd0\u884c\u4f60\u901a\u8fc7\u7cfb\u7edf\u8c03\u7528\u7684\u65b9\u5f0f，\u8bbf\u95eeOS[3,4GB]<\/p>\n<\/p>\n \u95ee\u9898<\/span><\/p>\n \u5728\u7cfb\u7edf\u4e2d，\u7528\u6237\u6216\u8005OS\u81ea\u5df1，\u600e\u4e48\u77e5\u9053\u5f53\u524d\u5904\u4e8e\u5185\u6838\u6001，\u8fd8\u662f\u7528\u6237\u6001?<\/span><\/p>\n<\/p>\n CPU\u4e2d\u6709\u4e2acs\u6bb5\u5bc4\u5b58\u5668，\u63a7\u5236\u4e24\u4e2abit\u4f4d，<\/p>\n 11->3:\u7528\u6237\u6001<\/p>\n 00->0:\u5185\u6838\u6001<\/p>\n<\/p>\n \u6240\u4ee5：\u5176\u5b9e\u5c31\u662f\u66f4\u6539cs\u5bc4\u5b58\u5668\u6bb5\u7684\u6570\u636e\u5b8c\u6210\u8eab\u4efd\u4e4b\u95f4\u7684\u5207\u6362<\/p>\n \u51fd\u6570\u539f\u578b：<\/p>\n \u53c2\u6570\u8bb2\u89e3： \u8fd4\u56de\u503c：\u6210\u529f\u8fd4\u56de\u00a00，\u5931\u8d25\u8fd4\u56de\u00a0-1（\u5e76\u8bbe\u7f6e\u00a0errno）\u3002<\/p>\n<\/p>\n \u5176\u5b9e\u8fd9\u4e2a\u6355\u6349\u51fd\u6570\u548c\u4e4b\u524d\u90a3\u4e2asignal\u51fd\u6570\u5341\u5206\u7684\u76f8\u4f3c，\u4e0b\u9762\u662f\u4ee3\u7801\u793a\u4f8b：<\/p>\n #include <iostream> void handler(int signum) int main() sigaction(SIGINT, &act, &oact); \/\/ \u5bf92\u53f7\u4fe1\u53f7\u8fdb\u884c\u4e86\u6355\u6349<\/p>\n while(true) \u8fd9\u662fstruct sigaction\u7ed3\u6784\u4f53，\u6b64\u65f6\u6211\u4eec\u7684\u91cd\u70b9\u805a\u7126\u5728\u4fe1\u53f7\u96c6\u4e0a<\/p>\n \u5f53\u67d0\u4e2a\u4fe1\u53f7\u7684\u5904\u7406\u51fd\u6570\u88ab\u8c03\u7528\u65f6,\u5185\u6838\u81ea\u52a8\u5c06\u5f53\u524d\u4fe1\u53f7\u52a0\u5165\u8fdb\u7a0b\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57,\u5f53\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u8fd4\u56de\u65f6\u81ea\u52a8\u6062\u590d\u539f\u6765\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57,\u8fd9\u6837\u5c31\u4fdd\u8bc1\u4e86\u5728\u5904\u7406\u67d0\u4e2a\u4fe1\u53f7\u65f6,\u5982\u679c\u8fd9\u79cd\u4fe1\u53f7\u518d\u6b21\u4ea7\u751f,\u90a3\u4e48 \u5b83\u4f1a\u88ab\u963b\u585e\u5230\u5f53\u524d\u5904\u7406\u7ed3\u675f\u4e3a\u6b62\u3002\u5982\u679c\u5728\u8c03\u7528\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u65f6,\u9664\u4e86\u5f53\u524d\u4fe1\u53f7\u88ab\u81ea\u52a8\u5c4f\u853d\u4e4b\u5916,\u8fd8\u5e0c\u671b\u81ea\u52a8\u5c4f\u853d\u53e6\u5916-\u4e9b\u4fe1\u53f7,\u5219\u7528sa mask\u5b57\u6bb5\u8bf4\u660e\u8fd9\u4e9b\u9700\u8981\u989d\u5916\u5c4f\u853d\u7684\u4fe1\u53f7,\u5f53\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u8fd4\u56de\u65f6\u81ea\u52a8\u6062\u590d\u539f\u6765\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57\u3002\u00a0<\/p>\n<\/p>\n \u901a\u4fd7\u6765\u8bb2\u5c31\u662f\u6355\u6349\u5230\u6307\u5b9a\u7684\u4fe1\u53f7\u96c6\u7684\u65f6\u5019，\u4f1a\u628a\u4ed6\u76f8\u5bf9\u5e94\u7684block\u8868\u7f6e\u4e3a1，\u8fdb\u884c\u963b\u585e，\u9632\u6b62\u591a\u4e2a\u4fe1\u53f7\u540c\u65f6\u6765\u7684\u60c5\u51b5<\/p>\n<\/p>\n<\/p>\n<\/p>\n \u63a5\u4e0b\u6765\u6211\u5c06\u4e3e\u4f8b\u4e00\u4e2a\u94fe\u8868\u5934\u63d2\u7684\u4f8b\u5b50：<\/span><\/p>\n \u5934\u63d2\u5206\u6210\u4e24\u4e2a\u6b65\u9aa4：<\/span><\/p>\n A.\u65b0\u52a0\u5165\u7684\u8282\u70b9\u7684\u4e0b\u4e00\u4e2a\u8282\u70b9\u6307\u5411head\u7684\u4e0b\u4e00\u4e2a\u8282\u70b9\u3002<\/span><\/p>\n B.head\u8282\u70b9\u7684\u4e0b\u4e00\u4e2a\u8282\u70b9\u6307\u5411\u65b0\u52a0\u5165\u7684\u8282\u70b9\u3002<\/span><\/p>\n<\/p>\n 1.\u5047\u8bbe\u6b64\u65f6node1\u8981\u5934\u63d2\u5230head\u8282\u70b9\u540e\u9762，\u5f53\u5b83\u6267\u884c\u5b8cA，\u51c6\u5907\u6267\u884cB\u7684\u65f6\u5019，\u53d1\u751f\u4e86\u8fdb\u7a0b\u7684\u8c03\u5ea6\u3002<\/p>\n<\/p>\n 2.\u6b64\u65f6node2\u4e5f\u8981\u5934\u63d2\u5230head\u8282\u70b9\u540e\u9762，\u5f53node2\u63d2\u5165\u5b8c\u7684\u65f6\u5019\u3002\u53c8\u53d1\u751f\u4e86\u8fdb\u7a0b\u7684\u8c03\u5ea6\u5230node1\u5934\u63d2\u7684\u8fdb\u7a0b\u3002<\/p>\n<\/p>\n 3.\u6b64\u65f6\u6267\u884cB\u64cd\u4f5c，\u6700\u540e\u5c31\u4f1a\u9020\u6210\u4e0b\u56fe4\u7684\u73b0\u8c61，\u9020\u6210node2\u6570\u636e\u7684\u4e22\u5931<\/p>\n \u603b\u7ed3：<\/span><\/p>\n \u4e0d\u53ef\u91cd\u5165\u51fd\u6570\u548c\u53ef\u91cd\u5165\u51fd\u6570\u53ea\u662f\u4e00\u4e2a\u7279\u6027\u3002<\/p>\n \u4e0d\u53ef\u91cd\u5165\u51fd\u6570：<\/span><\/p>\n \u5927\u90e8\u5206\u7684\u51fd\u6570，\u90fd\u662f\u4e0d\u53ef\u91cd\u5165\u7684 \n\u53ef\u91cd\u5165\u51fd\u6570：<\/span><\/p>\n \u53ea\u6709\u81ea\u5df1\u7684\u4e34\u65f6\u53d8\u91cf– \u53ef\u91cd\u5165\u7684\u3002<\/p>\n<\/p>\n<\/p>\n \u4f9d\u65e7\u662f\u4e3e\u4e2a\u4f8b\u5b50：\u89c2\u5bdf\u4e0b\u9762\u4ee3\u7801，<\/span><\/p>\n \u5bf9\u4e8eflag \u53d8\u91cf<\/span><\/p>\n \u6b63\u5e38\u7684\u60c5\u51b5\u4e0b\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u8fdb\u884c\u4e0b\u9762\u64cd\u4f5c<\/p>\n 1.\u4e0d\u65ad\u7684\u4ece\u7269\u7406\u5185\u5b58\u4e2d\u53d6\u6570\u636e，\u770bfalg\u662f\u5426\u6539\u53d8<\/span><\/p>\n 2.\u5bf9falg\u53d8\u91cf\u8fdb\u884c\u5224\u65ad，\u662f\u5426\u7ed3\u675f\u5faa\u73af<\/span><\/p>\n \u4f46\u662f\u6b64\u65f6main\u51fd\u6570\u91cc\u4e0d\u4f1a\u5bf9flag\u53d8\u91cf\u8fdb\u884c\u6539\u53d8，\u6240\u6709\u5c31\u4f1a\u6709\u4e9b\u4f18\u5316\u7ea7\u522b\u9ad8\u7684\u7f16\u8f91\u5668，\u5c31\u4f1a\u628a\u4ece\u7269\u7406\u5185\u5b58\u4e2d\u62ff\u6570\u636e\u8fd9\u4e2a\u64cd\u4f5c\u7ed9\u780d\u65ad，\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<\/p>\n \u6b64\u65f6volatile\u7684\u4f5c\u7528：<\/p>\n \u2f26\u8fdb\u7a0b\u5728\u7ec8\u2f4c\u65f6\u4f1a\u7ed9\u2f57\u8fdb\u7a0b\u53d1SIGCHLD\u4fe1\u53f7,\u8be5\u4fe1\u53f7\u7684\u9ed8\u8ba4\u5904\u7406\u52a8\u4f5c\u662f\u5ffd\u7565,\u2f57\u8fdb\u7a0b\u53ef\u4ee5\u2f83 \u5b9a\u4e49 <\/span><\/p>\n SIGCHLD\u4fe1\u53f7\u7684\u5904\u7406\u51fd\u6570<\/span><\/p>\n #include <stdio.h> void handler(int sig) int main() \u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb82\u6b21\u3002\u6587\u7ae0\u6458\u8981 \u8fdb\u7a0b\u4fe1\u53f7\u662fLinux\u7cfb\u7edf\u4e2d\u7684\u91cd\u8981\u901a\u4fe1\u673a\u5236\uff0c\u7528\u4e8e\u5f02\u6b65\u901a\u77e5\u8fdb\u7a0b\u7279\u5b9a\u4e8b\u4ef6\u7684\u53d1\u751f\u3002\u4fe1\u53f7\u53ef\u5206\u4e3a\u5e38\u89c4\u4fe1\u53f7\u548c\u5b9e\u65f6\u4fe1\u53f7\uff0c\u53ef\u901a\u8fc7\u952e\u76d8\u8f93\u5165\u3001\u7cfb\u7edf\u8c03\u7528\u3001\u786c\u4ef6\u5f02\u5e38\u7b49\u65b9\u5f0f\u4ea7\u751f\u3002\u8fdb\u7a0b\u5bf9\u4fe1\u53f7\u7684\u5904\u7406\u5305\u62ec\u9ed8\u8ba4\u52a8\u4f5c\u3001\u5ffd\u7565\u4fe1\u53f7\u6216\u81ea\u5b9a\u4e49\u5904\u7406\u51fd\u6570\u3002\u5185\u6838\u901a\u8fc7pending\u8868\u3001block\u8868\u548chandler\u8868\u4e09\u5f20\u4f4d\u56fe\u7ed3\u6784\u7ba1\u7406\u4fe1\u53f7\u72b6\u6001\u3002\u4fe1\u53f7\u6355\u6349\u6d89\u53ca\u7528\u6237\u6001\u4e0e\u5185\u6838\u6001\u7684\u5207\u6362\uff0c\u5176\u4e2d\u786c\u4ef6\u5f02\u5e38\u548c\u7cfb\u7edf\u8c03\u7528\u662f\u89e6\u53d1\u4fe1\u53f7\u7684\u4e3b\u8981\u9014\u5f84\u3002volatile\u5173\u952e\u5b57\u53ef\u9632\u6b62\u7f16\u8bd1\u5668\u4f18\u5316\u5bf9\u4fe1\u53f7\u53d8\u91cf\u7684\u8bbf\u95ee\uff0c\u800cSIGCHLD\u4fe1\u53f7\u5219\u7528\u4e8e\u7236\u8fdb\u7a0b\u76d1\u63a7\u5b50\u8fdb\u7a0b\u72b6\u6001\u3002\u4fe1\u53f7\u673a\u5236\u4f53\u73b0\u4e86\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u786c\u4ef6\u4e2d\u65ad<\/p>\n","protected":false},"author":2,"featured_media":52344,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[58,43,44],"topic":[],"class_list":["post-52364","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-linux","tag-43","tag-44"],"yoast_head":"\n
\n\u4fe1\u53f7\u7684\u4ea7\u751f，\u76f8\u5bf9\u4e8e\u8fdb\u7a0b\u7684\u8fd0\u884c，\u662f\u5f02\u6b65\u7684!<\/p>\n<\/p>\n<\/p>\n
\n2.\u4fe1\u53f7\u7684\u5904\u7406，\u4e0d\u662f\u7acb\u5373\u5904\u7406，\u800c\u662f\u53ef\u4ee5\u7b49\u4e00\u4f1a\u5728\u5904\u7406，\u5408\u9002\u7684\u65f6\u5019，\u8fdb\u884c\u4fe1\u53f7\u7684\u5904\u7406
\n3.\u4eba\u80fd\u8bc6\u522b\u4fe1\u53f7，\u662f\u63d0\u524d\u88ab\u201d\u6559\u80b2\u201d\u8fc7\u7684，\u8fdb\u7a0b\u4e5f\u662f\u5982\u6b64,OS\u7a0b\u5e8f\u5458\u8bbe\u8ba1\u7684\u8fdb\u7a0b，\u8fdb\u7a0b\u65e9\u5df2\u7ecf\u5185\u7f6e<\/span>\u4e86\u5bf9\u4e8e\u4fe1\u53f7\u7684\u8bc6\u522b\u548c\u5904\u7406\u65b9\u5f0f!
\n4.\u4fe1\u53f7\u6e90\u975e\u5e38\u591a->\u7ed9\u8fdb\u7a0b\u4ea7\u751f\u4fe1\u53f7\u7684，\u4fe1\u53f7\u6e90，\u4e5f\u975e\u5e38\u591a<\/p>\n<\/p>\n<\/p>\n1.2.\u67e5\u770b\u4fe1\u53f7<\/h3>\n<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054509-68998365dba64.png\")
<\/p>\n<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054510-6899836634142.png\")
<\/p>\n<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054510-68998366572e9.png\")
<\/p>\n<\/p>\n1.3.\u4fe1\u53f7\u5904\u7406<\/h3>\n<\/p>\n
\n#include <unistd.h>
\n#include <signal.h><\/p>\n
\n{
\n std::cout << "\u6211\u662f：" << getpid() << "，\u6211\u83b7\u5f97\u4e86\u4e00\u4e2a\u4fe1\u53f7：" << signumber << std::endl;
\n}<\/p>\n
\n{
\n std::cout << "\u6211\u662f\u8fdb\u7a0b：" << getpid() << std::endl;
\n signal(SIGINT, SIG_DFL); \/\/ \u8bbe\u7f6e\u4fe1\u53f7\u9ed8\u8ba4\u5904\u7406\u884c\u4e3a
\n while(true){
\n std::cout << "I am a process, I am waiting signal!" << std::endl;<\/p>\n
\n }
\n}<\/p>\n
\n\/*
\n$ g++ sig.cc -o sig
\n$ .\/sig
\n\u6211\u662f\u8fdb\u7a0b：212791
\nI am a process, I am waiting signal!
\nI am a process, I am waiting signal!
\n^C \/\/ \u8f93\u5165Ctrl+C，\u8fdb\u7a0b\u9000\u51fa（SIGINT\u9ed8\u8ba4\u884c\u4e3a）
\n*\/<\/p>\n
\n#include <unistd.h>
\n#include <signal.h><\/p>\n
\n{
\n std::cout << "\u6211\u662f：" << getpid() << "，\u6211\u83b7\u5f97\u4e86\u4e00\u4e2a\u4fe1\u53f7：" << signumber << std::endl;
\n}<\/p>\n
\n{
\n std::cout << "\u6211\u662f\u8fdb\u7a0b：" << getpid() << std::endl;
\n signal(SIGQUIT, handler); \/\/ SIGQUIT \u4fe1\u53f7\u7f16\u53f7\u901a\u5e38\u4e3a 3
\n while(true){
\n std::cout << "I am a process, I am waiting signal!" << std::endl;
\n sleep(1);
\n }
\n}<\/p>\n
\n\/*
\n$ g++ sig.cc -o sig
\n$ .\/sig
\n\u6211\u662f\u8fdb\u7a0b：213056
\nI am a process, I am waiting signal!
\nI am a process, I am waiting signal!
\nI am a process, I am waiting signal!
\n^\\\\\u6211\u662f：213056，\u6211\u83b7\u5f97\u4e86\u4e00\u4e2a\u4fe1\u53f7：3 \/\/ \u6309\u4e0b Ctrl+\\\\ \u89e6\u53d1 SIGQUIT，\u6267\u884c\u81ea\u5b9a\u4e49 handler<\/p>\n
\n$ .\/sig
\n\u6211\u662f\u8fdb\u7a0b：213146
\nI am a process, I am waiting signal!
\nI am a process, I am waiting signal!
\n^\\\\Quit \/\/ \u6309\u4e0b Ctrl+\\\\ \u89e6\u53d1 SIGQUIT，\u6267\u884c\u9ed8\u8ba4\u884c\u4e3a（\u7ec8\u6b62\u8fdb\u7a0b\u5e76\u751f\u6210 core）
\n*\/<\/p>\n
\n#include <signal.h><\/p>\n
\n{
\n std::cout << "\u6211\u662f：" << getpid() << "，\u6211\u83b7\u5f97\u4e86\u4e00\u4e2a\u4fe1\u53f7：" << signumber << std::endl;
\n}<\/p>\n
\n{
\n std::cout << "\u6211\u662f\u8fdb\u7a0b：" << getpid() << std::endl;
\n signal(SIGINT, SIG_IGN); \/\/ \u8bbe\u7f6e\u5ffd\u7565\u4fe1\u53f7\u7684\u5b8f
\n while(true){
\n std::cout << "I am a process, I am waiting signal!" << std::endl;
\n sleep(1);
\n }
\n}<\/p>\n
\n\/*
\n$ g++ sig.cc -o sig
\n$ .\/sig
\n\u6211\u662f\u8fdb\u7a0b：212681
\nI am a process, I am waiting signal!
\nI am a process, I am waiting signal!
\n^C^C^C^C^CI am a process, I am waiting signal! \/\/ \u8f93\u5165ctrl+c\u6beb\u65e0\u53cd\u5e94
\nI am a process, I am waiting signal!
\n*\/<\/p>\n<\/p>\n<\/p>\n<\/p>\n2.\u4fe1\u53f7\u7684\u4ea7\u751f<\/h2>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054510-68998366730c7.png\")
<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054510-6899836681d38.png\")
<\/p>\n<\/p>\n2.1.\u8fdb\u7a0b\u7684\u7406\u89e3<\/h3>\n<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054510-689983668fc75.png\")
<\/p>\n<\/p>\n<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054510-68998366a119c.png\")
<\/p>\n<\/p>\n<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054510-68998366b04b3.png\")
<\/p>\n<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054510-68998366c04a7.png\")
<\/p>\n<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054510-68998366d489e.png\")
<\/p>\n<\/p>\n<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054510-68998366de6ea.png\")
\nfg \u4efb\u52a1\u53f7，\u7279\u5b9a\u7684\u8fdb\u7a0b，\u63d0\u5230\u524d\u53f0，ctrl+c，\u6b64\u65f6\u5c31\u53ef\u4ee5\u6740\u6b7b\u8fdb\u7a0b<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054510-68998366ec81a.png\")
<\/p>\n<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054511-689983670a7dc.png\")
<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054511-689983671bf13.png\")
<\/p>\n<\/p>\n<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054511-68998367273cf.png\")
<\/p>\n<\/p>\n2.2.\u4fe1\u53f7\u4ea7\u751f\u7684\u65b9\u5f0f<\/h3>\n<\/p>\n
2.2.1.\u901a\u8fc7\u952e\u76d8\u83b7\u53d6<\/h4>\n
\n#include <unistd.h>
\n#include <signal.h><\/p>\n
\n{
\n std::cout << "\u6211\u662f：" << getpid() << "，\u6211\u83b7\u5f97\u4e86\u4e00\u4e2a\u4fe1\u53f7：" << signumber << std::endl;
\n}<\/p>\n
\n{
\n std::cout << "\u6211\u662f\u8fdb\u7a0b：" << getpid() << std::endl;
\n signal(SIGINT, SIG_DFL); \/\/ \u8bbe\u7f6e\u4fe1\u53f7\u9ed8\u8ba4\u5904\u7406\u884c\u4e3a
\n while(true){
\n std::cout << "I am a process, I am waiting signal!" << std::endl;<\/p>\n
\n }
\n}<\/p>\n
\n\/*
\n$ g++ sig.cc -o sig
\n$ .\/sig
\n\u6211\u662f\u8fdb\u7a0b：212791
\nI am a process, I am waiting signal!
\nI am a process, I am waiting signal!
\n^C \/\/ \u8f93\u5165Ctrl+C，\u8fdb\u7a0b\u9000\u51fa（SIGINT\u9ed8\u8ba4\u884c\u4e3a）
\n*\/<\/p>\n
\n#include <unistd.h>
\n#include <signal.h><\/p>\n
\n{
\n std::cout << "\u6211\u662f：" << getpid() << "，\u6211\u83b7\u5f97\u4e86\u4e00\u4e2a\u4fe1\u53f7：" << signumber << std::endl;
\n}<\/p>\n
\n{
\n std::cout << "\u6211\u662f\u8fdb\u7a0b：" << getpid() << std::endl;
\n signal(SIGQUIT, handler); \/\/ SIGQUIT \u4fe1\u53f7\u7f16\u53f7\u901a\u5e38\u4e3a 3
\n while(true){
\n std::cout << "I am a process, I am waiting signal!" << std::endl;
\n sleep(1);
\n }
\n}<\/p>\n
\n\/*
\n$ g++ sig.cc -o sig
\n$ .\/sig
\n\u6211\u662f\u8fdb\u7a0b：213056
\nI am a process, I am waiting signal!
\nI am a process, I am waiting signal!
\nI am a process, I am waiting signal!
\n^\\\\\u6211\u662f：213056，\u6211\u83b7\u5f97\u4e86\u4e00\u4e2a\u4fe1\u53f7：3 \/\/ \u6309\u4e0b Ctrl+\\\\ \u89e6\u53d1 SIGQUIT，\u6267\u884c\u81ea\u5b9a\u4e49 handler<\/p>\n
\n$ .\/sig
\n\u6211\u662f\u8fdb\u7a0b：213146
\nI am a process, I am waiting signal!
\nI am a process, I am waiting signal!
\n^\\\\Quit \/\/ \u6309\u4e0b Ctrl+\\\\ \u89e6\u53d1 SIGQUIT，\u6267\u884c\u9ed8\u8ba4\u884c\u4e3a（\u7ec8\u6b62\u8fdb\u7a0b\u5e76\u751f\u6210 core）
\n*\/<\/p>\n
\n#include <unistd.h>
\n#include <signal.h><\/p>\n
\n{
\n std::cout << "\u6211\u662f：" << getpid() << "，\u6211\u83b7\u5f97\u4e86\u4e00\u4e2a\u4fe1\u53f7：" << signumber << std::endl;
\n}<\/p>\n
\n{
\n std::cout << "\u6211\u662f\u8fdb\u7a0b：" << getpid() << std::endl;
\n signal(SIGTSTP, handler); \/\/ SIGTSTP \u4fe1\u53f7\u7f16\u53f7\u901a\u5e38\u4e3a 20（\u7ec8\u7aef\u6682\u505c\u4fe1\u53f7，\u5982 Ctrl+Z）
\n while(true){
\n std::cout << "I am a process, I am waiting signal!" << std::endl;
\n sleep(1);
\n }
\n}<\/p>\n
\n\/*
\n$ .\/sig
\n\u6211\u662f\u8fdb\u7a0b：213552
\nI am a process, I am waiting signal!
\nI am a process, I am waiting signal!
\n^Z\u6211\u662f：213552，\u6211\u83b7\u5f97\u4e86\u4e00\u4e2a\u4fe1\u53f7：20 \/\/ \u6309\u4e0b Ctrl+Z \u89e6\u53d1 SIGTSTP，\u6267\u884c\u81ea\u5b9a\u4e49 handler<\/p>\n
\n$ .\/sig
\n\u6211\u662f\u8fdb\u7a0b：213627
\nI am a process, I am waiting signal!
\nI am a process, I am waiting signal!
\nI am a process, I am waiting signal!
\n^Z
\n[1]+ Stopped .\/sig \/\/ \u89e6\u53d1 SIGTSTP \u9ed8\u8ba4\u884c\u4e3a（\u6682\u505c\u8fdb\u7a0b）
\nwhb@bite:~\/code\/test$ jobs
\n[1]+ Stopped .\/sig \/\/ \u67e5\u770b\u6682\u505c\u7684\u8fdb\u7a0b
\n*\/<\/p>\n<\/p>\n2.2.2.\u8c03\u7528\u7cfb\u7edf\u547d\u4ee4\u5411\u8fdb\u7a0b\u53d1\u4fe1\u53f7<\/h4>\n<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054511-689983672fe02.png\")
<\/p>\n<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054511-689983674407e.png\")
<\/p>\n<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054511-6899836759c7b.png\")
<\/p>\n<\/p>\n<\/p>\n2.2.3.\u7cfb\u7edf\u8c03\u7528（\u51fd\u6570）<\/h4>\n<\/p>\n
2.2.3.1.kill<\/h5>\n<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054511-689983676773a.png\")
<\/p>\n<\/p>\n
\n#include <string>
\n#include <sys\/types.h>
\n#include <signal.h><\/p>\n
\nint main(int argc, char *argv[])
\n{
\n if(argc != 3)
\n {
\n std::cout << ".\/mykill signumber pid" << std::endl;
\n return 1;
\n }
\n int signum = std::stoi(argv[1]);\/\/stoi:\u5c06\u5b57\u7b26\u4e32\u8f6c\u6210\u6574\u6570
\n pid_t target = std::stoi(argv[2]);<\/p>\n
\n if(n == 0)
\n {
\n std::cout << "send " << signum << " to " << target << " success.";
\n }
\n return 0;
\n}<\/p>\n<\/p>\n2.2.3.2.raise<\/h5>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250811054511-68998367760f3.png\")
<\/p>\n<\/p>\n
\n#include <unistd.h>
\n#include <signal.h><\/p>\n
\n{
\n \/\/ \u6574\u4e2a\u4ee3\u7801\u5c31\u53ea\u6709\u8fd9\u4e00\u5904\u6253\u5370
\n std::cout << "\u83b7\u53d6\u4e86\u4e00\u4e2a\u4fe1\u53f7：" << signumber << std::endl;
\n}<\/p>\n
\nint main()
\n{
\n signal(2, handler); \/\/ \u5148\u5bf92\u53f7\u4fe1\u53f7\u8fdb\u884c\u6355\u6349
\n \/\/ \u6bcf\u96941S，\u81ea\u5df1\u7ed9\u81ea\u5df1\u53d1\u90012\u53f7\u4fe1\u53f7
\n while(true)
\n {
\n sleep(1);
\n raise(2);
\n }
\n}<\/p>\n
\n\/*
\n$ g++ raise.cc -o raise
\n$ .\/raise
\n\u83b7\u53d6\u4e86\u4e00\u4e2a\u4fe1\u53f7：2
\n\u83b7\u53d6\u4e86\u4e00\u4e2a\u4fe1\u53f7：2
\n\u83b7\u53d6\u4e86\u4e00\u4e2a\u4fe1\u53f7：2
\n*\/<\/p>\n<\/p>\n2.2.3.3.abort<\/h5>\n<\/p>\n
![\"\"](\"2025-08-11ibwy0iikt4e.png\")
<\/p>\n<\/p>\n
\n#include <unistd.h>
\n#include <stdlib.h>
\n#include <signal.h><\/p>\n
\n{
\n \/\/ \u6574\u4e2a\u4ee3\u7801\u5c31\u53ea\u6709\u8fd9\u4e00\u5904\u6253\u5370
\n std::cout << "\u83b7\u53d6\u4e86\u4e00\u4e2a\u4fe1\u53f7：" << signumber << std::endl;
\n}<\/p>\n
\nint main()
\n{
\n signal(SIGABRT, handler);
\n while(true)
\n {
\n sleep(1);
\n abort();
\n }
\n}<\/p>\n
\n\/*
\n$ g++ Abort.cc -o Abort
\n$ .\/Abort
\n\u83b7\u53d6\u4e86\u4e00\u4e2a\u4fe1\u53f7：6 \/\/ \u5b9e\u9a8c\u53ef\u4ee5\u5f97\u77e5, abort\u7ed9\u81ea\u5df1\u53d1\u9001\u7684\u662f\u56fa\u5b9a6\u53f7\u4fe1\u53f7, \u867d\u7136\u6355\u6349\u4e86, \u4f46\u662f\u8fd8\u662f\u8981\u9000\u51fa
\nAborted<\/p>\n
\n$ .\/Abort
\nAborted
\n*\/<\/p>\n<\/p>\n2.2.4.\u786c\u4ef6\u5f02\u5e38\u4ea7\u751f\u4fe1\u53f7<\/h4>\n<\/p>\n
\n#include <signal.h><\/p>\n
\n{
\n printf("catch a sig : %d\\\\n", sig);
\n}<\/p>\n
\nint main()
\n{
\n \/\/signal(SIGFPE, handler); \/\/ 8) SIGFPE（\u7b97\u672f\u5f02\u5e38\u4fe1\u53f7，\u5982\u9664\u96f6\u9519\u8bef）
\n sleep(1);
\n int a = 10;
\n a \/= 0; \/\/ \u89e6\u53d1\u9664\u96f6\u9519\u8bef，\u4ea7\u751f SIGFPE \u4fe1\u53f7
\n while(1);
\n return 0;
\n}<\/p>\n
\n\/\/ \u60c5\u51b51：\u4e0d\u6ce8\u91ca\u7b2c11\u884c（\u6ce8\u518c\u4fe1\u53f7\u5904\u7406\u51fd\u6570）：
\n\/\/ $ gcc sigfpe.c -o sigfpe
\n\/\/ $ .\/sigfpe
\n\/\/ catch a sig : 8 # handler \u6355\u83b7\u5230 SIGFPE（\u7f16\u53f78）
\n\/\/ Floating point exception (core dumped) # \u7cfb\u7edf\u4ecd\u7ec8\u6b62\u8fdb\u7a0b（\u7b97\u672f\u5f02\u5e38\u4e3a\u81f4\u547d\u9519\u8bef）<\/p>\n
\n\/\/ $ gcc sigfpe.c -o sigfpe
\n\/\/ $ .\/sigfpe
\n\/\/ Floating point exception (core dumped) # \u76f4\u63a5\u5d29\u6e83，\u65e0 handler \u8f93\u51fa<\/p>\n
\n#include <signal.h><\/p>\n
\n{
\n printf("catch a sig : %d\\\\n", sig);
\n}<\/p>\n
\n{
\n \/\/signal(SIGSEGV, handler); \/\/ SIGSEGV：\u6bb5\u9519\u8bef\u4fe1\u53f7（\u7f16\u53f711，\u5982\u89e3\u5f15\u7528\u7a7a\u6307\u9488）
\n sleep(1);
\n int *p = NULL;
\n *p = 100; \/\/ \u89e3\u5f15\u7528\u7a7a\u6307\u9488，\u89e6\u53d1 SIGSEGV
\n while(1);
\n return 0;
\n}<\/p>\n
\n\/\/ \u60c5\u51b51：\u6ce8\u91ca\u7b2c37\u884c（\u672a\u6ce8\u518c\u4fe1\u53f7\u5904\u7406\u51fd\u6570）：
\n\/\/ $ gcc sigsegv.c -o sigsegv
\n\/\/ $ .\/sigsegv
\n\/\/ Segmentation fault (core dumped) # \u76f4\u63a5\u5d29\u6e83，\u65e0 handler \u8f93\u51fa<\/p>\n
\n\/\/ $ gcc sigsegv.c -o sigsegv
\n\/\/ $ .\/sigsegv
\n\/\/ catch a sig : 11 # handler \u6355\u83b7\u5230 SIGSEGV（\u7f16\u53f711）
\n\/\/ Segmentation fault (core dumped) # \u4ecd\u5d29\u6e83（\u6bb5\u9519\u8bef\u4e3a\u81f4\u547d\u5f02\u5e38）<\/p>\n<\/p>\n2.2.5.\u8f6f\u4ef6\u6761\u4ef6\u4ea7\u751f\u4fe1\u53f7<\/h4>\n<\/p>\n
![\"\"](\"2025-08-11kqrx2qbgr1y.png\")
<\/p>\n<\/p>\n<\/p>\n<\/p>\n2.2.5.1.\u4f7f\u7528alarm\u51fd\u6570\u9a8c\u8bc1io\u7684\u901f\u5ea6<\/h5>\n<\/p>\n
\n#include <iostream>
\n#include <unistd.h>
\n#include <signal.h><\/p>\n
\n{
\n int count = 0;
\n while(true)
\n {
\n std::cout << "count : " << count << std::endl;
\n count++;
\n }
\n return 0;
\n}
\n… …
\ncount : 107148
\ncount : 107149
\nAlarm clock \/\/ \u957f\u65f6\u95f4\u672a\u9000\u51fa，\u7cfb\u7edf\u53ef\u80fd\u56e0\u7ec8\u7aef\u7f13\u51b2\u6216\u8d85\u65f6\u5f3a\u5236\u7ec8\u6b62（\u6216\u89e6\u53d1\u9ed8\u8ba4\u95f9\u949f\u4fe1\u53f7）<\/p>\n<\/p>\n
\n#include <iostream>
\n#include <unistd.h>
\n#include <signal.h><\/p>\n
\nvoid handler(int signumber)
\n{
\n std::cout << "count : " << count << std::endl;
\n exit(0);
\n}<\/p>\n
\n{
\n signal(SIGALRM, handler);
\n alarm(1); \/\/ 1\u79d2\u540e\u89e6\u53d1 SIGALRM \u4fe1\u53f7
\n while (true)
\n {
\n count++; \/\/ \u7eaf\u8ba1\u7b97，\u65e0IO
\n }
\n return 0;
\n}
\n$ g++ alarm.cc -o alarm
\nwhb@bite:~\/code\/test$ .\/alarm
\ncount : 49233713 # 1\u79d2\u5185\u7eaf\u8ba1\u7b97\u7684\u5faa\u73af\u6b21\u6570（\u8fdc\u9ad8\u4e8eIO\u5bc6\u96c6\u578b，\u4f53\u73b0IO\u8017\u65f6\u5f71\u54cd）<\/p>\n<\/p>\n<\/p>\n3.\u4fdd\u5b58\u4fe1\u53f7<\/h2>\n
![\"\"](\"2025-08-11uf0tv0jqrnx.png\")
<\/p>\n<\/p>\n3.1.\u6982\u5ff5\u94fa\u57ab<\/h3>\n
\n2.\u4fe1\u53f7\u4ece\u4ea7\u751f\u5230\u9012\u8fbe\u4e4b\u95f4\u7684\u72b6\u6001,\u79f0\u4e3a\u4fe1\u53f7\u672a\u51b3(Pending)\u3002
\n3.\u8fdb\u7a0b\u53ef\u4ee5\u9009\u62e9\u963b\u585e(Block)\u67d0\u4e2a\u4fe1\u53f7\u3002\u88ab\u963b\u585e\u7684\u4fe1\u53f7\u4ea7\u751f\u65f6\u5c06\u4fdd\u6301\u5728\u672a\u51b3\u72b6\u6001,\u76f4\u5230\u8fdb\u7a0b\u89e3\u9664\u5bf9\u6b64\u4fe1\u53f7\u7684\u963b\u585e,\u624d\u6267\u884c\u9012\u8fbe\u7684\u52a8\u4f5c\u3002<\/p>\n![\"\"](\"2025-08-11ekvd34xwxzj.png\")
<\/p>\n<\/p>\n![\"\"](\"2025-08-11vdqtfjqhhfp.png\")
<\/p>\n<\/p>\n<\/p>\n3.2.\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570<\/h3>\n<\/p>\n
![\"\"](\"2025-08-11cmd5kwjlqcr.png\")
<\/p>\n
\n\u53c2\u6570：set \u6307\u5411\u8981\u521d\u59cb\u5316\u7684 sigset_t \u53d8\u91cf\u3002
\n\u8fd4\u56de：\u6210\u529f\u8fd4\u56de 0，\u5931\u8d25\u8fd4\u56de – 1（\u5e76\u8bbe\u7f6e errno）\u3002
\n\u6ce8\u610f：\u4f7f\u7528\u4fe1\u53f7\u96c6\u524d\u5fc5\u987b\u5148\u521d\u59cb\u5316，\u5426\u5219\u5185\u5bb9\u4e0d\u786e\u5b9a\u3002<\/p>\n
\n\u53c2\u6570：set \u6307\u5411\u8981\u521d\u59cb\u5316\u7684 sigset_t \u53d8\u91cf\u3002
\n\u8fd4\u56de：\u6210\u529f\u8fd4\u56de 0，\u5931\u8d25\u8fd4\u56de – 1\u3002
\n\u573a\u666f：\u9700\u8981\u963b\u585e\u6240\u6709\u4fe1\u53f7\u65f6，\u5148 fill \u518d\u8c03\u6574\u3002<\/p>\n
\n\u53c2\u6570：set \u662f\u76ee\u6807\u96c6\u5408，signo \u662f\u4fe1\u53f7\u7f16\u53f7（\u5982 SIGUSR1）\u3002
\n\u8fd4\u56de：\u6210\u529f 0，\u5931\u8d25 – 1\u3002
\n\u6ce8\u610f：\u6dfb\u52a0\u524d\u96c6\u5408\u9700\u5df2\u521d\u59cb\u5316（\u5982\u7528 sigemptyset \u6216 sigfillset）\u3002<\/p>\n
\n\u53c2\u6570：set \u662f\u76ee\u6807\u96c6\u5408，signo \u662f\u4fe1\u53f7\u7f16\u53f7\u3002
\n\u8fd4\u56de：\u6210\u529f 0，\u5931\u8d25 – 1\u3002
\n\u573a\u666f：\u6bd4\u5982\u5148 fill \u6240\u6709\u4fe1\u53f7，\u518d del \u6389\u4e0d\u60f3\u963b\u585e\u7684\u4fe1\u53f7\u3002<\/p>\n
\n\u53c2\u6570：set \u662f\u4fe1\u53f7\u96c6，signo \u662f\u8981\u68c0\u67e5\u7684\u4fe1\u53f7\u3002
\n\u8fd4\u56de：
\n1：\u4fe1\u53f7\u5728\u96c6\u5408\u4e2d；
\n0：\u4fe1\u53f7\u4e0d\u5728\u96c6\u5408\u4e2d；
\n-1：\u51fa\u9519（\u5982 signo \u65e0\u6548）\u3002
\n\u7528\u9014：\u5224\u65ad\u67d0\u4e2a\u4fe1\u53f7\u662f\u5426\u88ab\u5305\u542b，\u5e38\u7528\u4e8e\u8c03\u8bd5\u6216\u903b\u8f91\u5224\u65ad\u3002<\/p>\n<\/p>\n![\"\"](\"2025-08-11ckjpjfpssfn.png\")
<\/p>\n<\/p>\n\n
![\"\"](\"2025-08-11qipl2vm4l30.png\")
<\/li>\n<\/ul>\n![\"\"](\"2025-08-113moav3l0p2h.png\")
<\/p>\n<\/p>\n\n
\n#include <signal.h><\/p>\n
\n{
\n for(int i=31;i>=1;i–){
\n if(sigismember(&pending,)i){
\n cout<<"1"<<;
\n }else{
\n cout<<"0"<<;
\n }
\n }
\n}<\/p>\n
\n sigset_t block, oldset;
\n \/\/\u521d\u59cb\u5316
\n sigmptyset(&block);
\n sigmptyset(&oldset);<\/p>\n
\n sigaddset(&block,2);
\n int n=sigprocmask(SIG_SETMASK,&block,&oldset);<\/p>\n
\n sigset_t pending;
\n int m=sigpending(&pending);<\/p>\n
\n Pint(pending);
\n}<\/p>\n<\/p>\n<\/p>\n![\"\"](\"2025-08-1113b4a1t3qvb.png\")
<\/p>\n<\/p>\n![\"\"](\"2025-08-11tuk0meu5hqa.png\")
<\/p>\n<\/p>\n<\/p>\n<\/p>\n4.\u6355\u6349\u4fe1\u53f7<\/h2>\n
![\"\"](\"2025-08-11kvx5zvf3fiy.png\")
<\/p>\n<\/p>\n![\"\"](\"2025-08-111whdgcps5za.png\")
<\/p>\n![\"\"](\"2025-08-115fzolwanxwr.png\")
<\/p>\n![\"\"](\"2025-08-11qd2my2on0hr.png\")
<\/p>\n<\/p>\n<\/p>\n4.1.\u5185\u6838\u6001\u548c\u7528\u6237\u6001<\/h3>\n<\/p>\n
4.1.1.\u64cd\u4f5c\u7cfb\u7edf\u662f\u5982\u4f55\u8fd0\u884c\u7684<\/h4>\n
![\"\"](\"2025-08-11ko1td3zjlay.png\")
<\/p>\n<\/p>\n4.1.1.1.\u786c\u4ef6\u4e2d\u65ad<\/h5>\n
![\"\"](\"2025-08-11llcwzmx0ksg.png\")
<\/p>\n<\/p>\n![\"\"](\"2025-08-11biv0iipde4r.png\")
<\/p>\n<\/p>\n<\/p>\n![\"\"](\"2025-08-11pwzeativ0ak.png\")
<\/p>\n<\/p>\n<\/p>\n4.1.1.2.\u65f6\u949f\u4e2d\u65ad<\/h5>\n<\/p>\n
![\"\"](\"2025-08-11l13nk3exf5y.png\")
<\/p>\n<\/p>\n![\"\"](\"2025-08-11xnzc25nkewq.png\")
<\/p>\n<\/p>\n![\"\"](\"2025-08-11nhi12kahda5.png\")
<\/p>\n<\/p>\n![\"\"](\"2025-08-11xinu32pxi1r.png\")
<\/p>\n![\"\"](\"2025-08-11g0tqvziiu4z.png\")
<\/p>\n<\/p>\n<\/p>\n![\"\"](\"2025-08-115puf3vzmtta.png\")
<\/p>\n<\/p>\n
\n\u00a0<\/p>\n<\/p>\n<\/p>\n4.1.1.3.\u786c\u4ef6\u5f02\u5e38<\/h5>\n<\/p>\n
![\"\"](\"2025-08-11mvcyr3eurzx.png\")
<\/p>\n<\/p>\n<\/p>\n<\/p>\n4.1.1.4.\u8f6f\u4e2d\u65ad<\/h5>\n<\/p>\n
![\"\"](\"2025-08-11rs0hmqcwgpf.png\")
<\/p>\n<\/p>\n![\"\"](\"2025-08-11o5a0fkesv3k.png\")
<\/p>\n<\/p>\n![\"\"](\"2025-08-11zzrrwnlppp3.png\")
<\/p>\n<\/p>\n<\/p>\n![\"\"](\"2025-08-11cbfxztpvc5d.png\")
<\/p>\n<\/p>\n![\"\"](\"2025-08-11tdktbzw25fi.png\")
<\/p>\n<\/p>\n
\n\u00a0<\/p>\n4.2.\u5185\u6838\u6001\u548c\u7528\u6237\u6001\u603b\u7ed3<\/h3>\n<\/p>\n
![\"\"](\"2025-08-11rd32som1kvv.png\")
<\/p>\n<\/p>\n![\"\"](\"2025-08-11dzfvatrjcd5.png\")
<\/p>\n<\/p>\n![\"\"](\"2025-08-1142mxqeakxnd.png\")
<\/p>\n<\/p>\n<\/p>\n
\n\u7528\u6237\u548c\u5185\u6838，\u90fd\u5728\u540c\u4e00\u4e2a[0,4GB]\u7684\u5730\u5740\u7a7a\u95f4\u4e0a\u4e86，\u5982\u679c\u7528\u6237，\u968f\u4fbf\u62ff\u4e00\u4e2a\u865a\u62df\u5730\u5740[3,4GB]，\u7528\u6237\u4e0d\u5c31\u53ef\u4ee5\u968f\u4fbf\u8bbf\u95ee\u5185\u6838\u4e2d\u7684\u4ee3\u7801\u548c\u6570\u636e\u4e86\u5417?<\/span><\/p>\n![\"\"](\"2025-08-11toiloiujxbe.png\")
<\/p>\n<\/p>\n<\/p>\n4.3.sigaction\u4fe1\u53f7\u6355\u6349<\/h3>\n<\/p>\n
![\"\"](\"2025-08-11ijud3rpcd5k.png\")
<\/p>\n<\/p>\n
\n\u00a0<\/p>\n\n
\n#include <unistd.h>
\n#include <signal.h>
\n#include <cstdlib><\/p>\n
\n{
\n std::cout << "hello signal: " << signum << std::endl;
\n exit(0);
\n}<\/p>\n
\n{
\n struct sigaction act, oact;
\n act.sa_handler = handler;<\/p>\n
\n {
\n std::cout << "hello world" << std::endl;
\n sleep(1);
\n }
\n return 0;
\n}<\/p>\n<\/p>\n![\"\"](\"2025-08-11r2h20ew3fpo.png\")
<\/p>\n<\/p>\n5.\u8fdb\u7a0b\u4fe1\u53f7\u884d\u751f\u7684\u51e0\u7ec4\u95ee\u9898<\/h2>\n<\/p>\n
5.1.\u53ef\u91cd\u5165\u51fd\u6570<\/h3>\n<\/p>\n
![\"\"](\"2025-08-114vqtvntxttp.png\")
<\/p>\n<\/p>\n<\/p>\n
\n\u8c03\u7528\u4e86malloc\u6216free,\u56e0\u4e3amalloc\u4e5f\u662f\u7528\u5168\u5c40\u94fe\u8868\u6765\u7ba1\u7406\u5806\u7684\u3002\u8c03\u7528\u4e86\u6807\u51c6I\/0\u5e93\u51fd\u6570\u3002\u6807\u51c6I\/0\u5e93\u7684\u5f88\u591a\u5b9e\u73b0\u90fd\u4ee5\u4e0d\u53ef\u91cd\u5165\u7684\u65b9\u5f0f\u4f7f\u7528\u5168\u5c40\u6570\u636e\u7ed3\u6784\u3002<\/p>\n5.2.volatile<\/h3>\n<\/p>\n
![\"\"](\"2025-08-11k1wqx3hlj0q.png\")
<\/p>\n<\/p>\n![\"\"](\"2025-08-11ovg4ysg1r0r.png\")
<\/p>\n<\/p>\n<\/p>\n5.3.SIGCHLD\u4fe1\u53f7<\/h3>\n<\/p>\n
\n#include <stdlib.h>
\n#include <signal.h><\/p>\n
\n{
\n pid_t id;
\n while( (id = waitpid(-1, NULL, WNOHANG)) > 0 ) {
\n printf("wait child success: %d\\\\n", id);
\n }
\n printf("child is quit! %d\\\\n", getpid());
\n}<\/p>\n
\n{
\n signal(SIGCHLD, handler);
\n pid_t cid;
\n if((cid = fork()) == 0){\/\/child
\n printf("child : %d\\\\n", getpid());
\n sleep(3);
\n exit(1);
\n }
\n while(1){
\n printf("father proc is doing some thing!\\\\n");
\n sleep(1);
\n }
\n return 0;
\n}<\/p>\n<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"