{"id":582,"date":"2017-10-19T20:11:22","date_gmt":"2017-10-19T12:11:22","guid":{"rendered":"https:\/\/i007.cc\/wordpress\/?p=582"},"modified":"2017-11-24T15:17:05","modified_gmt":"2017-11-24T07:17:05","slug":"linux-%e4%b8%8b-c-%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/582","title":{"rendered":"Linux \u4e0b C++ \u5f02\u5e38\u5904\u7406\u6280\u5de7"},"content":{"rendered":"
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2016\/07\/18 \u00b7\u00a0C\/C++<\/a>\u00a0\u00b7\u00a0C++<\/a>,\u00a0Linux<\/a>,\u00a0\u5f02\u5e38\u5904\u7406<\/a><\/p>\n<\/div>\n

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\u5206\u4eab\u5230\uff1a<\/span>3<\/span><\/a><\/div>\n<\/div>\n
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\u539f\u6587\u51fa\u5904\uff1a\u00a0IBM developerworks\u00a0<\/a><\/div>\n
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\u5904\u7406\u56fa\u6709\u8bed\u8a00\u5c40\u9650\u6027\u7684\u56db\u79cd\u6280\u672f<\/h1>\n<\/div>\n

\u5904\u7406 C++ \u4e2d\u7684\u5f02\u5e38\u4f1a\u5728\u8bed\u8a00\u7ea7\u522b\u4e0a\u9047\u5230\u5c11\u8bb8\u9690\u542b\u9650\u5236\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u4ee5\u7ed5\u8fc7\u5b83\u4eec\u3002\u5b66\u4e60\u5404\u79cd\u5229\u7528\u5f02\u5e38\u7684\u65b9\u6cd5\uff0c\u60a8\u5c31\u53ef\u4ee5\u751f\u4ea7\u66f4\u53ef\u9760\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n

\u4fdd\u7559\u5f02\u5e38\u6765\u6e90\u4fe1\u606f<\/h1>\n
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\u5728 C++\u4e2d\uff0c\u65e0\u8bba\u4f55\u65f6\u5728\u5904\u7406\u7a0b\u5e8f\u5185\u6355\u83b7\u4e00\u4e2a\u5f02\u5e38\uff0c\u5173\u4e8e\u8be5\u5f02\u5e38\u6765\u6e90\u7684\u4fe1\u606f\u90fd\u662f\u4e0d\u4e3a\u4eba\u77e5\u7684\u3002\u5f02\u5e38\u7684\u5177\u4f53\u6765\u6e90\u53ef\u4ee5\u63d0\u4f9b\u8bb8\u591a\u66f4\u597d\u5730\u5904\u7406\u8be5\u5f02\u5e38\u7684\u91cd\u8981\u4fe1\u606f\uff0c\u6216\u8005\u63d0\u4f9b\u4e00\u4e9b\u53ef\u4ee5\u9644\u52a0\u5230\u9519\u8bef\u65e5\u5fd7\u7684\u4fe1\u606f\uff0c\u4ee5\u4fbf\u4ee5\u540e\u8fdb\u884c\u5206\u6790\u3002<\/p>\n

\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e00\u95ee\u9898\uff0c\u53ef\u4ee5\u5728\u629b\u51fa\u5f02\u5e38\u8bed\u53e5\u671f\u95f4\uff0c\u5728\u5f02\u5e38\u5bf9\u8c61\u7684\u6784\u9020\u51fd\u6570\u4e2d\u751f\u6210\u4e00\u4e2a\u5806\u6808\u8ddf\u8e2a\u3002ExceptionTracer<\/code>\u00a0\u662f\u793a\u8303\u8fd9\u79cd\u884c\u4e3a\u7684\u4e00\u4e2a\u7c7b\u3002<\/p>\n

\u6e05\u5355 1. \u5728\u5f02\u5e38\u5bf9\u8c61\u6784\u9020\u51fd\u6570\u4e2d\u751f\u6210\u4e00\u4e2a\u5806\u6808\u8ddf\u8e2a<\/p>\n

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\/\/ Sample Program:<\/span><\/div>\n
\/\/ Compiler: gcc 3.2.3 20030502<\/span><\/div>\n
\/\/ Linux: Red Hat<\/span><\/div>\n
#include <execinfo.h><\/span><\/div>\n
#include <signal.h><\/span><\/div>\n
#include <exception><\/span><\/div>\n
#include <iostream><\/span><\/div>\n
using <\/span>namespace<\/span> std<\/span>;<\/span><\/div>\n
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/<\/span><\/div>\n
class<\/span> ExceptionTracer<\/span><\/div>\n
{<\/span><\/div>\n
public<\/span>:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>ExceptionTracer<\/span>(<\/span>)<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>void<\/span> *<\/span> array<\/span>[<\/span>25<\/span>]<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>int<\/span> nSize<\/span> =<\/span> backtrace<\/span>(<\/span>array<\/span>,<\/span> 25<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>char<\/span> *<\/span>*<\/span> symbols<\/span> =<\/span> backtrace_symbols<\/span>(<\/span>array<\/span>,<\/span> nSize<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>for<\/span> (<\/span>int<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> nSize<\/span>;<\/span> i<\/span>++<\/span>)<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>cout<\/span> <<<\/span> symbols<\/span>[<\/span>i<\/span>]<\/span> <<<\/span> endl<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>free<\/span>(<\/span>symbols<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span><\/div>\n
}<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

\u7ba1\u7406\u4fe1\u53f7<\/h1>\n

\u6bcf\u5f53\u8fdb\u7a0b\u6267\u884c\u4e00\u4e2a\u4ee4\u4eba\u8ba8\u538c\u7684\u52a8\u4f5c\uff0c\u4ee5\u81f4\u4e8e Linux\u2122 \u5185\u6838\u53d1\u51fa\u4e00\u4e2a\u4fe1\u53f7\u65f6\uff0c\u8be5\u4fe1\u53f7\u90fd\u5fc5\u987b\u88ab\u5904\u7406\u3002\u4fe1\u53f7\u5904\u7406\u7a0b\u5e8f\u901a\u5e38\u4f1a\u91ca\u653e\u4e00\u4e9b\u91cd\u8981\u8d44\u6e90\u5e76\u7ec8\u6b62\u5e94\u7528\u7a0b\u5e8f\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u5806\u6808\u4e0a\u7684\u6240\u6709\u5bf9\u8c61\u5b9e\u4f8b\u90fd\u5904\u4e8e\u672a\u7834\u574f\u72b6\u6001\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u5982\u679c\u8fd9\u4e9b\u4fe1\u53f7\u88ab\u8f6c\u6362\u6210 C++ \u5f02\u5e38\uff0c\u90a3\u4e48\u60a8\u53ef\u4ee5\u4f18\u96c5\u5730\u8c03\u7528\u5176\u6784\u9020\u51fd\u6570\uff0c\u5e76\u5b89\u6392\u591a\u5c42 catch \u5757\uff0c\u4ee5\u4fbf\u66f4\u597d\u5730\u5904\u7406\u8fd9\u4e9b\u4fe1\u53f7\u3002<\/p>\n

\u6e05\u5355 2 \u4e2d\u5b9a\u4e49\u7684\u00a0SignalExceptionClass<\/code>\uff0c\u63d0\u4f9b\u4e86\u8868\u793a\u5185\u6838\u53ef\u80fd\u53d1\u51fa\u4fe1\u53f7\u7684 C++ \u5f02\u5e38\u7684\u62bd\u8c61\u3002SignalTranslator<\/code>\u00a0\u662f\u4e00\u4e2a\u57fa\u4e8e\u00a0SignalExceptionClass<\/code>\u00a0\u7684\u6a21\u677f\u7c7b\uff0c\u5b83\u901a\u5e38\u7528\u6765\u5b9e\u73b0\u5230 C++ \u5f02\u5e38\u7684\u8f6c\u6362\u3002\u5728\u4efb\u4f55\u77ac\u95f4\uff0c\u53ea\u80fd\u6709\u4e00\u4e2a\u4fe1\u53f7\u5904\u7406\u7a0b\u5e8f\u5904\u7406\u4e00\u4e2a\u6d3b\u52a8\u8fdb\u7a0b\u7684\u4e00\u4e2a\u4fe1\u53f7\u3002\u56e0\u6b64\uff0cSignalTranslator<\/code>\u00a0\u91c7\u7528\u4e86 singleton \u8bbe\u8ba1\u6a21\u5f0f\u3002\u6574\u4f53\u6982\u5ff5\u901a\u8fc7\u7528\u4e8e SIGSEGV \u7684\u00a0SegmentationFault<\/code>\u00a0\u7c7b\u548c\u7528\u4e8e SIGFPE \u7684\u00a0FloatingPointException<\/code>\u00a0\u7c7b\u5f97\u5230\u4e86\u5c55\u793a\u3002<\/p>\n

\u6e05\u5355 2. \u5c06\u4fe1\u53f7\u8f6c\u6362\u6210\u5f02\u5e38<\/p>\n

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template<\/span> <<\/span>class<\/span> SignalExceptionClass<\/span>><\/span> class<\/span> SignalTranslator<\/span><\/div>\n
{<\/span><\/div>\n
private<\/span>:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>class<\/span> SingleTonTranslator<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>public<\/span>:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>SingleTonTranslator<\/span>(<\/span>)<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>signal<\/span>(<\/span>SignalExceptionClass<\/span>::<\/span>GetSignalNumber<\/span>(<\/span>)<\/span>,<\/span> SignalHandler<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>static<\/span> void<\/span> SignalHandler<\/span>(<\/span>int<\/span>)<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>throw<\/span> SignalExceptionClass<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span>;<\/span><\/div>\n
public<\/span>:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>SignalTranslator<\/span>(<\/span>)<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>static<\/span> SingleTonTranslator <\/span>s_objTranslator<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span><\/div>\n
}<\/span>;<\/span><\/div>\n
\/\/ An example for SIGSEGV<\/span><\/div>\n
class<\/span> SegmentationFault<\/span> :<\/span> public<\/span> ExceptionTracer<\/span>,<\/span> public<\/span> exception<\/span><\/div>\n
{<\/span><\/div>\n
public<\/span>:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>static<\/span> int<\/span> GetSignalNumber<\/span>(<\/span>)<\/span> {<\/span>return<\/span> SIGSEGV<\/span>;<\/span>}<\/span><\/div>\n
}<\/span>;<\/span><\/div>\n
SignalTranslator<\/span><<\/span>SegmentationFault<\/span>><\/span> g_objSegmentationFaultTranslator<\/span>;<\/span><\/div>\n
\/\/ An example for SIGFPE<\/span><\/div>\n
class<\/span> FloatingPointException<\/span> :<\/span> public<\/span> ExceptionTracer<\/span>,<\/span> public<\/span> exception<\/span><\/div>\n
{<\/span><\/div>\n
public<\/span>:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>static<\/span> int<\/span> GetSignalNumber<\/span>(<\/span>)<\/span> {<\/span>return<\/span> SIGFPE<\/span>;<\/span>}<\/span><\/div>\n
}<\/span>;<\/span><\/div>\n
SignalTranslator<\/span><<\/span>FloatingPointException<\/span>><\/span> g_objFloatingPointExceptionTranslator<\/span>;<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

\u7ba1\u7406\u6784\u9020\u51fd\u6570\u548c\u6790\u6784\u51fd\u6570\u4e2d\u7684\u5f02\u5e38<\/h1>\n

\u5728\u5168\u5c40\uff08\u9759\u6001\u5168\u5c40\uff09\u53d8\u91cf\u7684\u6784\u9020\u548c\u6790\u6784\u671f\u95f4\uff0c\u6bcf\u4e2a ANSI C++ \u90fd\u6355\u83b7\u5230\u5f02\u5e38\u662f\u4e0d\u53ef\u80fd\u7684\u3002\u56e0\u6b64\uff0cANSI C++ \u4e0d\u5efa\u8bae\u5728\u90a3\u4e9b\u5176\u5b9e\u4f8b\u53ef\u80fd\u88ab\u5b9a\u4e49\u4e3a\u5168\u5c40\u5b9e\u4f8b\uff08\u9759\u6001\u5168\u5c40\u5b9e\u4f8b\uff09\u7684\u7c7b\u7684\u6784\u9020\u51fd\u6570\u548c\u6790\u6784\u51fd\u6570\u4e2d\u629b\u51fa\u5f02\u5e38\u3002\u6362\u4e00\u79cd\u8bf4\u6cd5\u5c31\u662f\u6c38\u8fdc\u90fd\u4e0d\u8981\u4e3a\u90a3\u4e9b\u5176\u6784\u9020\u51fd\u6570\u548c\u6790\u6784\u51fd\u6570\u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u7c7b\u5b9a\u4e49\u5168\u5c40\uff08\u9759\u6001\u5168\u5c40\uff09\u5b9e\u4f8b\u3002\u4e0d\u8fc7\uff0c\u5982\u679c\u5047\u5b9a\u6709\u4e00\u4e2a\u7279\u5b9a\u7f16\u8bd1\u5668\u548c\u4e00\u4e2a\u7279\u5b9a\u7cfb\u7edf\uff0c\u90a3\u4e48\u53ef\u80fd\u53ef\u4ee5\u8fd9\u6837\u505a\uff0c\u5e78\u8fd0\u7684\u662f\uff0c\u5bf9\u4e8e Linux \u4e0a\u7684 GCC\uff0c\u6070\u597d\u662f\u8fd9\u79cd\u60c5\u51b5\u3002<\/p>\n

\u4f7f\u7528\u00a0ExceptionHandler<\/code>\u00a0\u7c7b\u53ef\u4ee5\u5c55\u793a\u8fd9\u4e00\u70b9\uff0c\u8be5\u7c7b\u4e5f\u91c7\u7528\u4e86 singleton \u8bbe\u8ba1\u6a21\u5f0f\u3002\u5176\u6784\u9020\u51fd\u6570\u6ce8\u518c\u4e86\u4e00\u4e2a\u672a\u6355\u83b7\u7684\u5904\u7406\u7a0b\u5e8f\u3002\u56e0\u4e3a\u6bcf\u6b21\u53ea\u80fd\u6709\u4e00\u4e2a\u672a\u6355\u83b7\u7684\u5904\u7406\u7a0b\u5e8f\u5904\u7406\u4e00\u4e2a\u6d3b\u52a8\u8fdb\u7a0b\uff0c\u6784\u9020\u51fd\u6570\u5e94\u8be5\u53ea\u88ab\u8c03\u7528\u4e00\u6b21\uff0c\u56e0\u6b64\u8981\u91c7\u7528 singleton \u6a21\u5f0f\u3002\u5e94\u8be5\u5728\u5b9a\u4e49\u6709\u95ee\u9898\u7684\u5b9e\u9645\u5168\u5c40\uff08\u9759\u6001\u5168\u5c40\uff09\u53d8\u91cf\u4e4b\u524d\u5b9a\u4e49\u00a0ExceptionHandler<\/code>\u00a0\u7684\u5168\u5c40\uff08\u9759\u6001\u5168\u5c40\uff09\u5b9e\u4f8b\u3002<\/p>\n

\u6e05\u5355 3. \u5904\u7406\u6784\u9020\u51fd\u6570\u4e2d\u7684\u5f02\u5e38<\/p>\n

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62<\/div>\n<\/div>\n<\/td>\n
\n
\n
class<\/span> ExceptionHandler<\/span><\/div>\n
{<\/span><\/div>\n
private<\/span>:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>class<\/span> SingleTonHandler<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>public<\/span>:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>SingleTonHandler<\/span>(<\/span>)<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>set_terminate<\/span>(<\/span>Handler<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>static<\/span> void<\/span> Handler<\/span>(<\/span>)<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>\/\/ Exception from construction\/destruction of global variables<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>try<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>\/\/ re-throw<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>throw<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>catch<\/span> (<\/span>SegmentationFault<\/span> &<\/span>)<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>cout<\/span> <<<\/span> “SegmentationFault”<\/span> <<<\/span> endl<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>catch<\/span> (<\/span>FloatingPointException<\/span> &<\/span>)<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>cout<\/span> <<<\/span> “FloatingPointException”<\/span> <<<\/span> endl<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>catch<\/span> (<\/span>.<\/span>.<\/span>.<\/span>)<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>cout<\/span> <<<\/span> “Unknown Exception”<\/span> <<<\/span> endl<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>\/\/if this is a thread performing some core activity<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>abort<\/span>(<\/span>)<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>\/\/ else if this is a thread used to service requests<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>\/\/ pthread_exit();<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span>;<\/span><\/div>\n
public<\/span>:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>ExceptionHandler<\/span>(<\/span>)<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>static<\/span> SingleTonHandler <\/span>s_objHandler<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span><\/div>\n
}<\/span>;<\/span><\/div>\n
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/<\/span><\/div>\n
class<\/span> A<\/span><\/div>\n
{<\/span><\/div>\n
public<\/span>:<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>A<\/span>(<\/span>)<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>\/\/int i = 0, j = 1\/i;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>*<\/span>(<\/span>int<\/span> *<\/span>)<\/span>0<\/span> =<\/span> 0<\/span>;<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>}<\/span><\/div>\n
}<\/span>;<\/span><\/div>\n
\/\/ Before defining any global variable, we define a dummy instance<\/span><\/div>\n
\/\/ of ExceptionHandler object to make sure that<\/span><\/div>\n
\/\/ ExceptionHandler::SingleTonHandler::SingleTonHandler() is invoked<\/span><\/div>\n
ExceptionHandler <\/span>g_objExceptionHandler<\/span>;<\/span><\/div>\n
A<\/span> g_a<\/span>;<\/span><\/div>\n
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/<\/span><\/div>\n
int<\/span> main<\/span>(<\/span>int<\/span> argc<\/span>,<\/span> char<\/span>*<\/span> argv<\/span>[<\/span>]<\/span>)<\/span><\/div>\n
{<\/span><\/div>\n
\u00a0\u00a0\u00a0\u00a0 <\/span>return<\/span> 0<\/span>;<\/span><\/div>\n
}<\/span><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n

\u5904\u7406\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u4e2d\u7684\u5f02\u5e38<\/h1>\n

\u6709\u65f6\u4e00\u4e9b\u5f02\u5e38\u6ca1\u6709\u88ab\u6355\u83b7\uff0c\u8fd9\u5c06\u9020\u6210\u8fdb\u7a0b\u5f02\u5e38\u4e2d\u6b62\u3002\u4e0d\u8fc7\u5f88\u591a\u65f6\u5019\uff0c\u8fdb\u7a0b\u5305\u542b\u591a\u4e2a\u7ebf\u7a0b\uff0c\u5176\u4e2d\u5c11\u6570\u7ebf\u7a0b\u6267\u884c\u6838\u5fc3\u5e94\u7528\u7a0b\u5e8f\u903b\u8f91\uff0c\u540c\u65f6\uff0c\u5176\u4f59\u7ebf\u7a0b\u4e3a\u5916\u90e8\u8bf7\u6c42\u63d0\u4f9b\u670d\u52a1\u3002\u5982\u679c\u670d\u52a1\u7ebf\u7a0b\u56e0\u7f16\u7a0b\u9519\u8bef\u800c\u6ca1\u6709\u5904\u7406\u67d0\u4e2a\u5f02\u5e38\uff0c\u5219\u4f1a\u9020\u6210\u6574\u4e2a\u5e94\u7528\u7a0b\u5e8f\u5d29\u6e83\u3002\u8fd9\u4e00\u70b9\u53ef\u80fd\u662f\u4e0d\u53d7\u4eba\u4eec\u6b22\u8fce\u7684\uff0c\u56e0\u4e3a\u5b83\u4f1a\u901a\u8fc7\u5411\u5e94\u7528\u7a0b\u5e8f\u4f20\u9001\u4e0d\u5408\u6cd5\u7684\u8bf7\u6c42\u800c\u52a9\u957f\u62d2\u7edd\u670d\u52a1\u653b\u51fb\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u4e00\u70b9\uff0c\u672a\u6355\u83b7\u5904\u7406\u7a0b\u5e8f\u53ef\u4ee5\u51b3\u5b9a\u662f\u8bf7\u6c42\u5f02\u5e38\u4e2d\u6b62\u8c03\u7528\uff0c\u8fd8\u662f\u8bf7\u6c42\u7ebf\u7a0b\u9000\u51fa\u8c03\u7528\u3002\u6e05\u5355 3 \u4e2d\u00a0ExceptionHandler::SingleTonHandler::Handler()<\/code>\u00a0\u51fd\u6570\u7684\u672b\u5c3e\u5904\u5c55\u793a\u4e86\u8be5\u5904\u7406\u7a0b\u5e8f\u3002<\/p>\n

\u7ed3\u675f\u8bed<\/h1>\n

\u6211\u7b80\u5355\u5730\u8ba8\u8bba\u4e86\u5c11\u8bb8 C++ \u7f16\u7a0b\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u4ee5\u4fbf\u66f4\u597d\u5730\u6267\u884c\u4ee5\u4e0b\u4efb\u52a1\uff1a<\/p>\n

    \n
  • \u5728\u629b\u51fa\u5f02\u5e38\u7684\u65f6\u5019\u8ffd\u8e2a\u5f02\u5e38\u7684\u6765\u6e90\u3002<\/li>\n
  • \u5c06\u4fe1\u53f7\u4ece\u5185\u6838\u7a0b\u5e8f\u8f6c\u6362\u6210 C++ \u5f02\u5e38\u3002<\/li>\n
  • \u6355\u83b7\u6784\u9020\u548c\/\u6216\u6790\u6784\u5168\u5c40\u53d8\u91cf\u671f\u95f4\u629b\u51fa\u7684\u5f02\u5e38\u3002<\/li>\n
  • \u591a\u7ebf\u7a0b\u8fdb\u7a0b\u4e2d\u7684\u5f02\u5e38\u5904\u7406\u3002<\/li>\n<\/ul>\n

    \u6211\u5e0c\u671b\u60a8\u80fd\u91c7\u7528\u8fd9\u4e9b\u6280\u5de7\u4e2d\u7684\u4e00\u4e9b\u6765\u5f00\u53d1\u65e0\u5fe7\u4ee3\u7801\u3002<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

    2016\/07\/18 \u00b7\u00a0C\/C++\u00a0\u00b7<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[118],"class_list":["post-582","post","type-post","status-publish","format-standard","hentry","tag-02-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/582","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=582"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/582\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=582"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=582"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=582"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}