我在C中使用共享内存。在这一行中，我想更改我使用的共享内存中数组的元素，我从valgrind得到了这个错误： ==11668== Process terminating with default action of signal 11 (SIGSEGV) ==11668== Bad permissions for mapped region at address 0x484002D ==11668== at 0x10977A: put_item (program.c:203) ==11668== ...

There are processes: the parent and the child, and the child is created by fork(). I use mmap() to implement IPC between the parent process and the child process, and there is a struct SharedMessage to be set to the shared memory. Here is its definition: ...

我在Linux中有这两个使用共享内存的简单程序。 数据客户端： FILE *fp; fp = fopen("mem.share", "r"); if (fp<=0){ cout<<"Error, cannot open memory link file"<<endl; return -1; } int shmid; fscanf (fp, "%d", &shmid); fprintf(fp, "%d", shmid); fclose(fp); cout<<"Using the file ...

I was wondering if it is possible to obtain the size of a shared memory segment in C created from shmget without having the size of the segment as a part of the data? I'm trying to allocate a dynamic int array and need to find the size of the array in the ...