PetscSetupUtils.cpp

/*

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 * Redistributions in binary form must reproduce the above copyright notice,
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   software without specific prior written permission.

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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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*/

#include "PetscSetupUtils.hpp"

#include <petsc.h>
#include <cstdlib>
#include <cassert>
#include <cstring>
#include <iostream>

#include "ChasteSyscalls.hpp"
#include "Exception.hpp"
#include "PetscException.hpp"
#include "CommandLineArguments.hpp"
#include "ChasteBuildRoot.hpp"
#include "GetCurrentWorkingDirectory.hpp"

#ifdef TEST_FOR_FPE
#include <fenv.h>
#include <signal.h>

void FpeSignalToAbort(int sig_num, siginfo_t* info, void* context )
{
       if ( info->si_code == FPE_FLTDIV)
       {
           std::cerr << "SIGFPE: floating point exception was divide by zero.\n";
       }
       else if ( info->si_code == FPE_FLTINV)
       {
           std::cerr << "SIGFPE: floating point exception was an invalid operation (like 0.0/0.0).\n";
       }
       else
       {
           std::cerr << "SIGFPE: unexpected error code.\n";
       }
}
#endif

void PetscSetupUtils::InitialisePetsc()
{
    // The CommandLineArguments instance is filled in by the cxxtest test suite runner.
    CommandLineArguments* p_args = CommandLineArguments::Instance();
    PETSCEXCEPT(PetscInitialize(p_args->p_argc, p_args->p_argv, PETSC_NULL, PETSC_NULL));
}


void PetscSetupUtils::CommonSetup()
{
    InitialisePetsc();

    // Check that the working directory is correct, or many tests will fail
    std::string cwd = GetCurrentWorkingDirectory() + "/";
    if (strcmp(cwd.c_str(), ChasteBuildRootDir()) != 0)
    {
#define COVERAGE_IGNORE
        // Change directory
        std::cout << std::endl << "Changing directory from '" << cwd << "' to '" << ChasteBuildRootDir() << "'." << std::endl;
        EXPECT0(chdir, ChasteBuildRootDir());
        std::cout << "CWD now: " << GetCurrentWorkingDirectory() << std::endl;
#undef COVERAGE_IGNORE
    }

#ifdef TEST_FOR_FPE
    // Give all PETSc enabled tests the ability to trap for divide-by-zero
    feenableexcept(FE_DIVBYZERO | FE_INVALID );
    // Catch all SIGFPE signals and convert them to exceptions (before PETSc gets to them)
    struct sigaction sa;
    sa.sa_sigaction = FpeSignalToAbort;
    sa.sa_flags = SA_RESETHAND|SA_SIGINFO;
    sa.sa_restorer = 0;
    sigaction(SIGFPE, &sa, NULL);
#endif
}