Debug.cpp

/*
 
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This file is part of Chaste.
 
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modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
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   contributors may be used to endorse or promote products derived from this
   software without specific prior written permission.
 
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
*/
 
#include "Debug.hpp"
#include <execinfo.h>     //For backtrace
#include <unistd.h>       // For memory profiling
#include <sys/resource.h> // For memory profiling
//#include <cxxabi.h> // For demangling C++ C-style names
 
double eMemoryAtMarker = 0.0;
 
std::string FormDebugHead()
{
    std::stringstream header;
    header << "DEBUG: ";
    if (PetscTools::IsParallel())
    {
        header << "proc " << PetscTools::GetMyRank() << ": ";
    }
    return header.str();
}
 
 
void PrintTheStack()
{
    TRACE("Stack information");
    // storage array for stack trace address data
    void* address_list[20u]; //20 is about the number of stack symbols we are going to print
 
    // retrieve current stack addresses
    unsigned num_addresses = backtrace(address_list, sizeof(address_list) / sizeof(void*));
 
    char** symbol_list = backtrace_symbols(address_list, num_addresses);
 
    // iterate over the returned symbol lines.
    for (unsigned i = 0; i < num_addresses; i++)
    {
        // We could demangle, but this may not be portable on GNU Linux versus Mac OSX
        // char* ret = abi::__cxa_demangle(begin_name, funcname, &funcnamesize, &status);
        TRACE("Level " << i << ": " << symbol_list[i]);
    }
    free(symbol_list);
}
 
void MarkMemory()
{
    TRACE("PRINT_MEMORY will now be relative to here");
 
    struct rusage rusage;
    getrusage( RUSAGE_SELF, &rusage );
 
    // Store current memory footprint in Mb to allow calculations relative to this point
    eMemoryAtMarker = double(rusage.ru_maxrss)/1024.0;
}
 
void UnmarkMemory()
{
    TRACE("PRINT_MEMORY will now be absolute footprint");
 
    eMemoryAtMarker = 0.0;
}
 
void PrintMemory()
{
    struct rusage rusage;
    getrusage( RUSAGE_SELF, &rusage );
 
    // Memory as difference between now and the marker
    double memory = double(rusage.ru_maxrss)/1024.0 - eMemoryAtMarker;
 
    if (fabs(eMemoryAtMarker) < 1e-6) // If marker is zero, this is the total memory footprint
    {
        std::cout << FormDebugHead() << "Total memory footprint: " << memory << " Mb" << std::endl << std::flush;
    }
    else // If marker non-zero, this is a change in memory
    {
        std::cout << FormDebugHead() << "Memory change from marker: " << memory << " Mb" << std::endl << std::flush;
    }
}