C++ Library containing a lot of needful things: Stack Trace, Command Line Parser, Resource Handling, Configuration Files, Unix Command Execution, Directories, Regular Expressions, Tokenizer, Function Trace, Standard Extensions.
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251 lines
9.2 KiB
251 lines
9.2 KiB
/** @file |
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$Id$ |
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$Date$ |
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$Author$ |
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@copy © Marc Wäckerlin |
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@license LGPL, see file <a href="license.html">COPYING</a> |
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*/ |
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#include <mrw/stacktrace.hxx> |
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#include <mrw/exception.hxx> |
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#include <csignal> |
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#include <exception> |
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#include <iostream> |
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namespace mrw { |
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/** @addtogroup grpStackTrace */ |
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//@{ |
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/** @defgroup AutoTrace Automated Unexpected and Terminate Handler |
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with Stack Trace |
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@brief Don't care about the unexpected handler, don't care about |
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a try-catch in the main, let the library do all the repetitive |
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work for you. |
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For all your programs it is recommended to implement an |
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identical unexpected handler, that rethrows, catches the @c |
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mrw::exception, @c std::exception and all unknown exceptions, |
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traces them and finally quits with a throw of a @c |
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std::bad_exception. You are also required to write a @c try @c |
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catch block around all in your @c main, so that you don't miss |
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any exception. The only thing that may be different from project |
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to project is, how tracing is done. The MRW C++ Class Library |
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provides you with additional libraries you can link to. By |
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linking to the library, you get an unexpected handler and an |
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exception trace in the @c main for free: You don't need to add a |
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single line of code, just link to one more library! The |
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libraries differ in how tracing is done. |
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The Implementation is done with a static instance of a class that |
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sets the unexpected handler in the constructor. |
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@section trcstderr Trace using std::cerr |
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If you link to the library @c libmrwexcstderr using a linker |
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option such as: @c -lmrwexcstderr, then an unexpected and a |
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terminate handler are registered, that trace to the standard |
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error stream @c std::cerr. Also for all know signals there's a |
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signal handler to trace the stack before termination (except in |
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case of a @c SIGTRAP, wehere the program is not terminated). You |
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don't need to change a single line in your code! |
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*/ |
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//@{ |
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/** @brief unexpected handler, that traces to @c std::cerr |
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The unexpected handler is installed automatically when you link |
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to @c -lmrwexcstderr. The implementation of this unexpected |
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handler is as follows: |
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@code |
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void unexpected_stderr() { |
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std::cerr<<"UNEXPECTED EXCEPTION: ----------------------------"<<std::endl; |
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try { |
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StackTrace::createSymtable(); |
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throw; |
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} catch (const mrw::exception& x) { |
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std::cerr<<"---------- Reason:"<<std::endl |
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<<x.what()<<std::endl |
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<<"---------- Stack:"<<std::endl |
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<<x.stacktrace(); |
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} catch (const std::exception& x) { |
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std::string st((std::string)StackTrace()); |
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std::cerr<<"---------- Reason:"<<std::endl |
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<<x.what()<<std::endl |
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<<"---------- Stack: "<<std::endl<<st; |
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} catch (...) { |
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std::string st((std::string)StackTrace()); |
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std::cerr<<"---------- Reason: **** not available ****"<<std::endl |
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<<"---------- Stack:"<<std::endl<<st; |
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} |
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std::cerr<<"-------------------------------------------------"<<std::endl; |
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throw std::bad_exception(); |
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} |
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@endcode |
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*/ |
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void unexpected_stderr() { |
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std::cerr<<"UNEXPECTED EXCEPTION: ----------------------------"<<std::endl; |
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try { |
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StackTrace::createSymtable(); |
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throw; |
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} catch (const mrw::exception& x) { |
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std::cerr<<"---------- Reason:"<<std::endl |
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<<x.what()<<std::endl |
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<<"---------- Stack:"<<std::endl |
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<<x.stacktrace(); |
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} catch (const std::exception& x) { |
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std::string st((std::string)StackTrace()); |
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std::cerr<<"---------- Reason:"<<std::endl |
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<<x.what()<<std::endl |
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<<"---------- Stack:"<<std::endl<<st; |
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} catch (...) { |
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std::string st((std::string)StackTrace()); |
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std::cerr<<"---------- Reason: **** not available ****"<<std::endl |
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<<"---------- Stack:"<<std::endl<<st; |
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} |
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std::cerr<<"-------------------------------------------------"<<std::endl; |
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throw std::bad_exception(); |
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} |
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/** @brief terminate handler, that traces to @c std::cerr |
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The terminate handler is installed automatically when you link |
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to @c -lmrwexcstderr. The implementation of this terminate |
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handler is as follows: |
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@code |
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void terminate_stderr() { |
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std::cerr<<"UNCAUGHT EXCEPTION: ----------------------------"<<std::endl; |
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try { |
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throw; |
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} catch (const mrw::exception& x) { |
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StackTrace::createSymtable(); |
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std::cerr<<"---------- Reason:"<<std::endl |
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<<x.what()<<std::endl |
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<<"---------- Stack:"<<std::endl |
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<<x.stacktrace(); |
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} catch (const std::exception& x) { |
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std::cerr<<"---------- Reason:"<<std::endl |
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<<x.what()<<std::endl |
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<<"---------- Stack: **** not available ****"<<std::endl; |
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} catch (...) { |
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std::cerr<<"---------- Reason: **** not available ****"<<std::endl |
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<<"---------- Stack: **** not available ****"<<std::endl; |
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} |
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std::cerr<<"-------------------------------------------------"<<std::endl; |
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exit(1); |
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} |
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@endcode |
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*/ |
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void terminate_stderr() { |
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std::cerr<<"UNCAUGHT EXCEPTION: ----------------------------"<<std::endl; |
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try { |
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throw; |
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} catch (const mrw::exception& x) { |
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StackTrace::createSymtable(); |
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std::cerr<<"---------- Reason:"<<std::endl |
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<<x.what()<<std::endl |
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<<"---------- Stack:"<<std::endl |
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<<x.stacktrace(); |
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} catch (const std::exception& x) { |
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std::cerr<<"---------- Reason:"<<std::endl |
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<<x.what()<<std::endl |
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<<"---------- Stack: **** not available ****"<<std::endl; |
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} catch (...) { |
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std::cerr<<"---------- Reason: **** not available ****"<<std::endl |
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<<"---------- Stack: **** not available ****"<<std::endl; |
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} |
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std::cerr<<"-------------------------------------------------"<<std::endl; |
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exit(1); |
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} |
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/** @brief segmentation-fault handler, that traces using stderr |
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The segmentation-fault handler is installed automatically when you link |
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to @c -lmrwexcstderr. The implementation of this handler is as follows: |
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@code |
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void signal_stderr(int sig) { |
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std::cerr<<"SIGNAL RECEIVED: -------------------------------"<<std::endl; |
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std::string txt; |
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bool abort(true); |
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switch (sig) { |
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case SIGFPE: txt="SIGFPE: Arithmetic error."; break; |
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case SIGILL: txt="SIGILL: Illegal instruction."; break; |
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case SIGSEGV: txt="SIGSEGV: Segmentation fault" |
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" (invalid access to valid memory)."; break; |
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case SIGBUS: txt="SIGBUS: Invalid pointer dereference" |
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" (access to an invalid memory address)."; break; |
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case SIGABRT: txt="SIGABRT: Funktion 'abort' was called."; break; |
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case SIGTRAP: txt="SIGTRAP: Breakpoint instruction."; abort=false; break; |
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case SIGSYS: txt="SIGSYS: Bad system call."; break; |
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default: txt="Unknown Signal Nr. "+sig; break; |
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} |
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StackTrace::createSymtable(); |
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std::string st((std::string)StackTrace()); |
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stderr::LoggerPtr logger(stderr::Logger::getLogger(_T("mrw.stacktrace"))); |
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std::cerr<<"---------- Reason:"<<std::endl |
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<<"Aborted by signal: "<<txt<<std::endl |
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<<"---------- Stack:"<<std::endl |
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<<st<<std::endl |
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<<"-------------------------------------------------"<<std::endl; |
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if (abort) exit(1); |
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} |
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@endcode |
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*/ |
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void signal_stderr(int sig) { |
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std::cerr<<"SIGNAL RECEIVED: -------------------------------"<<std::endl; |
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std::string txt; |
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bool abort(true); |
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switch (sig) { |
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case SIGFPE: txt="SIGFPE: Arithmetic error."; break; |
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case SIGILL: txt="SIGILL: Illegal instruction."; break; |
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case SIGSEGV: txt="SIGSEGV: Segmentation fault" |
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" (invalid access to valid memory)."; break; |
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case SIGBUS: txt="SIGBUS: Invalid pointer dereference" |
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" (access to an invalid memory address)."; break; |
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case SIGABRT: txt="SIGABRT: Funktion 'abort' was called."; break; |
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case SIGTRAP: txt="SIGTRAP: Breakpoint instruction."; abort=false; break; |
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case SIGSYS: txt="SIGSYS: Bad system call."; break; |
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default: txt="Unknown Signal Nr. "+sig; break; |
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} |
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StackTrace::createSymtable(); |
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std::string st((std::string)StackTrace()); |
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std::cerr<<"---------- Reason:"<<std::endl |
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<<"Aborted by signal: "<<txt<<std::endl |
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<<"---------- Stack:"<<std::endl |
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<<st<<std::endl |
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<<"-------------------------------------------------"<<std::endl; |
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if (abort) exit(1); |
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} |
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//@} |
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//@} |
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class AutoStackTrace { |
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public: |
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AutoStackTrace() { |
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std::set_unexpected(&mrw::unexpected_stderr); |
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std::set_terminate(&mrw::terminate_stderr); |
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std::signal(SIGFPE, &mrw::signal_stderr); |
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std::signal(SIGILL, &mrw::signal_stderr); |
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std::signal(SIGSEGV, &mrw::signal_stderr); |
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std::signal(SIGBUS, &mrw::signal_stderr); |
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std::signal(SIGIOT, &mrw::signal_stderr); |
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std::signal(SIGTRAP, &mrw::signal_stderr); |
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std::signal(SIGSYS, &mrw::signal_stderr); |
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} |
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}; |
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// initialize stack traces (load symbols) |
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static AutoStackTrace _autoStackTrace; |
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}
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