退出代码3（不是我的返回值，正在寻找源代码）

Question

您好，

我的程序退出时代码为 3。没有错误消息，没有异常，并且退出不是由我的代码启动的。

当我尝试从文本文件读取极长的整数值时会出现问题（文本文件存在并正确打开，并且先前读取成功）。

我使用了大量的内存（事实上，我认为这可能是原因，因为我几乎确定我超过了每个进程 2GB 的内存限制）。我还使用 GMP（或者更确切地说，MPIR）库来乘以 bignum。我相当确定这不是文件 I/O 问题，因为我在完全内存中的先前程序版本上得到了相同的错误代码。

系统：
MS Visual Studio 2008
MS Windows Vista 家庭高级版 x86
MPIR 2.1.0 rc2
4GB RAM

此错误代码可能源自何处？

编辑：这是以代码 EDIT2 退出的过程

void condenseBinSplitFile(const char *sourceFilename, int partCount){
//condense results file into final P and Q
std::string tempFilename;
std::string inputFilename(sourceFilename);
std::string outputFilename(BIN_SPLIT_FILENAME_DATA2);
mpz_class *P = new mpz_class(0);
mpz_class *Q = new mpz_class(0);
mpz_class *PP = new mpz_class(0);
mpz_class *QQ = new mpz_class(0);
FILE *sourceFile;
FILE *resultFile;

fpos_t oldPos;
int swapCount = 0;
while (partCount > 1){
    std::cout << partCount << std::endl;
    sourceFile = fopen(inputFilename.c_str(), "r");     
    resultFile = fopen(outputFilename.c_str(), "w");
    for (int i=0; i<partCount/2; i++){
        //Multiplication order:
        //Get Q, skip P
        //Get QQ, mul Q and QQ, print Q, delete Q
        //Jump back to P, get P
        //Mul P and QQ, delete QQ
        //Skip QQ, get PP
        //Mul P and PP, delete P and PP

        //Get Q, skip P
        mpz_inp_str(Q->get_mpz_t(), sourceFile, CALC_BASE);
        fgetpos(sourceFile, &oldPos);
        skipLine(sourceFile);
        skipLine(sourceFile);

        //Get QQ, mul Q and QQ, print Q, delete Q
        mpz_inp_str(QQ->get_mpz_t(), sourceFile, CALC_BASE);      
        (*Q) *= (*QQ);
        mpz_out_str(resultFile, CALC_BASE, Q->get_mpz_t());
        fputc('\n', resultFile);
        (*Q) = 0;

        //Jump back to P, get P
        fsetpos(sourceFile, &oldPos);
        mpz_inp_str(P->get_mpz_t(), sourceFile, CALC_BASE);

        //Mul P and QQ, delete QQ
        (*P) *= (*QQ);
        (*QQ) = 0;

        //Skip QQ, get PP
        skipLine(sourceFile);
        skipLine(sourceFile);
        mpz_inp_str(PP->get_mpz_t(), sourceFile, CALC_BASE); 
        //Mul P and PP, delete PP, print P, delete P             
        (*P) += (*PP);
        (*PP) = 0;
        mpz_out_str(resultFile, CALC_BASE, P->get_mpz_t());
        fputc('\n', resultFile);
        (*P) = 0;
    }
    partCount /= 2;

    fclose(sourceFile);
    fclose(resultFile);

    //swap filenames
    tempFilename = inputFilename;
    inputFilename = outputFilename;
    outputFilename = tempFilename;
    swapCount++;
}

delete P;
delete Q;
delete PP;
delete QQ;

remove(BIN_SPLIT_FILENAME_RESULTS);
if (swapCount%2 == 0)
    rename(sourceFilename, BIN_SPLIT_FILENAME_RESULTS);
else
    rename(BIN_SPLIT_FILENAME_DATA2, BIN_SPLIT_FILENAME_RESULTS);
}

：完全内存版本也以 3 退出

void binarySplitE(const ULONG first, const ULONG last, mpz_class *P, mpz_class *Q){
//P(first, last) = P(first, mid)*Q(mid, last) + P(mid, last)
//Q(first, last) = Q(first, mid)*Q(mid, last)
if (last - first == 1){
    calcP(P, first, last);
    calcQ(Q, first, last);
    return;
}

ULONG mid = (first+last)/2;
mpz_class *PP = new mpz_class(*P);
mpz_class *QQ = new mpz_class(*Q);
//Calculate P(first, mid) and Q(first, mid)
binarySplitE(first, mid, P, Q);
//Calculate P(mid, last) and Q(mid, last)
binarySplitE(mid, last, PP, QQ);

//P(first, last) == P(first, mid)
*P *= (*QQ);
//P(first, last) == P(first, mid)*Q(mid, last)
*P += (*PP);
//P(first, last) == P(first, mid)*Q(mid, last) + P(mid, last);

//Q(first, last) == Q(first, mid)
*Q *= (*QQ);
//Q(first, last) == Q(first, mid)*Q(mid, last)

delete PP;
delete QQ;
}

Answer 1

看来此退出代码是由 MPIR(GMP) 返回的，因为它无法分配大量内存。有点烦人的是，这没有出现在任何文档中。