[英]Stack Smashing Error MPI_Send() and MPI_Recv()
I want to resolve stack smashing error in the code 我想解决代码中的堆栈粉碎错误
I have tried running the code with mpicc and mpiexec 我尝试使用mpicc和mpiexec运行代码
#include "mpi.h"
#include <stdio.h>
int main(int argc, char *argv[])
{
int rank,size,x,status;
MPI_Init(&argc,&argv);
MPI_Comm_rank(MPI_COMM_WORLD,&rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
if(rank==0)
{
scanf("%d",&x);
MPI_Send(&x,1,MPI_INT,1,1,MPI_COMM_WORLD);
printf("I have send %d from process 0\n",x);
//fflush(stdout);
}
else
{
MPI_Recv(&x,1,MPI_INT,0,1,MPI_COMM_WORLD,&status);
printf("I have received %d in process 1\n",x);
//fflush(stdout);
}
MPI_Finalize();
return 0;
}
I expected the code to print the receiving and sending statements but the actual output prints the receiving and sending statements and gives 我希望代码能打印接收和发送语句,但实际输出会打印接收和发送语句并给出
* stack smashing error * *堆栈粉碎错误*
I can't understand why does it happen? 我不明白为什么会这样?
You need to use MPI_Status
instead of int
for declaring the status
variable, as shown in the code below. 您需要使用MPI_Status
而不是int
来声明status
变量,如下面的代码所示。
#include <mpi/mpi.h>
#include <stdio.h>
int main(int argc, char *argv[])
{
int rank,size,x;
MPI_Status status;
MPI_Init(&argc,&argv);
MPI_Comm_rank(MPI_COMM_WORLD,&rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
if(rank==0)
{
scanf("%d",&x);
MPI_Send(&x,1,MPI_INT,1,1,MPI_COMM_WORLD);
printf("I have send %d from process 0\n",x);
//fflush(stdout);
}
else
{
MPI_Recv(&x,1,MPI_INT,0,1,MPI_COMM_WORLD,&status);
printf("I have received %d in process 1\n",x);
//fflush(stdout);
}
MPI_Finalize();
return 0;
}
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