92 lines
2.0 KiB
C++
92 lines
2.0 KiB
C++
/**
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* Copyright - See the COPYRIGHT that is included with this distribution.
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* EPICS pvData is distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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*/
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/**
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* @author mes
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*/
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#include <sstream>
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#include <cstdio>
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#include <cstring>
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#define epicsExportSharedSymbols
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#include <pv/epicsException.h>
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namespace epics{ namespace pvData {
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void
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ExceptionMixin::print(FILE *fp) const
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{
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fprintf(fp, "On line %d of %s\n",m_line,m_file);
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#if defined(EXCEPT_USE_BACKTRACE)
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if(m_depth>0) {
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fflush(fp); // must flush before using raw handle
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backtrace_symbols_fd(m_stack, m_depth, fileno(fp));
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fprintf(fp, "To translate run 'addr2line -e execname 0xXXXXXXX ...'\n"
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" Note: Must be compiled with debug symbols\n");
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}
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#endif
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}
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std::string
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ExceptionMixin::show() const
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{
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std::ostringstream out;
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out<<"On line "<<m_line<<" of "<<m_file<<"\n";
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#if defined(EXCEPT_USE_BACKTRACE)
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if (m_depth>0) {
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char **symbols=backtrace_symbols(m_stack, m_depth);
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for(int i=0; i<m_depth; i++) {
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out<<symbols[i]<<"\n";
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}
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free(symbols);
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}
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#endif
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return out.str();
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}
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const char*
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BaseException::what() const throw()
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{
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try{
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if (base_msg.size()==0) {
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const char *base=std::logic_error::what();
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std::string out, stack;
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const ExceptionMixin *info=dynamic_cast<const ExceptionMixin*>(this);
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if(info) {
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stack=info->show();
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}
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out.reserve(strlen(base)+1+stack.size()+1);
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out+=base;
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out+="\n";
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if(info) {
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out+=stack;
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out+="\n";
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}
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base_msg.swap(out);
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}
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return base_msg.c_str();
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} catch(std::bad_alloc&) {
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return "BaseException::what - Insufficient memory to construct message";
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} catch(...) {
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return "BaseException::what - Unknown error when constructing message";
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}
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}
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}}
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