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实现SystemV共享内存 (#690)
* 实现SystemV共享内存 * 测试shm * 添加测试程序 * 完善细节 * 修正shm的时间数据错误的问题 * fix: devfs的metadata权限为0x777的错误 --------- Co-authored-by: longjin <longjin@DragonOS.org>
This commit is contained in:
Jomo
GitHub
3
user/apps/test_shm/.gitignore
vendored
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3
user/apps/test_shm/.gitignore
vendored
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info
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sender
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receiver
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25
user/apps/test_shm/Makefile
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user/apps/test_shm/Makefile
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ifeq ($(ARCH), x86_64)
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CROSS_COMPILE=x86_64-linux-musl-
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else ifeq ($(ARCH), riscv64)
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CROSS_COMPILE=riscv64-linux-musl-
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endif
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CC=$(CROSS_COMPILE)gcc
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NAME_PREFIX=test_shm_
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all: sender.c receiver.c test_info.c
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$(CC) -static -o $(NAME_PREFIX)sender sender.c
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$(CC) -static -o $(NAME_PREFIX)receiver receiver.c
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$(CC) -static -o $(NAME_PREFIX)info test_info.c
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.PHONY: install clean
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install: all
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mv $(NAME_PREFIX)sender $(DADK_CURRENT_BUILD_DIR)/
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mv $(NAME_PREFIX)receiver $(DADK_CURRENT_BUILD_DIR)/
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mv $(NAME_PREFIX)info $(DADK_CURRENT_BUILD_DIR)/
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clean:
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rm $(NAME_PREFIX)receiver $(NAME_PREFIX)sender $(NAME_PREFIX)info *.o
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fmt:
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40
user/apps/test_shm/receiver.c
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user/apps/test_shm/receiver.c
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/shm.h>
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#include <sys/ipc.h>
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#include <string.h>
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#include <sys/wait.h>
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#define SHM_SIZE 9999
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int main()
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{
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int shmid;
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char *shmaddr;
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key_t key = 6666;
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// 测试shmget
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shmid = shmget(key, SHM_SIZE, 0666 | IPC_CREAT);
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if (shmid < 0)
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{
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perror("shmget failed");
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exit(EXIT_FAILURE);
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}
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// 测试shmat
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shmaddr = shmat(shmid, 0, 0);
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char read_buf[20];
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memcpy(read_buf, shmaddr, 14);
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printf("Receiver receive: %s\n", read_buf);
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memset(shmaddr, 0, SHM_SIZE);
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memcpy(shmaddr, "Reveiver Hello!", 16);
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shmdt(shmaddr);
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return 0;
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}
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46
user/apps/test_shm/sender.c
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user/apps/test_shm/sender.c
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/shm.h>
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#include <sys/ipc.h>
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#include <string.h>
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#include <sys/wait.h>
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#define SHM_SIZE 9999
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int main()
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{
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int shmid;
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char *shmaddr;
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key_t key = 6666;
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// 测试shmget
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shmid = shmget(key, SHM_SIZE, 0666 | IPC_CREAT);
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if (shmid < 0)
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{
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perror("shmget failed");
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exit(EXIT_FAILURE);
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}
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// 测试shmat
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shmaddr = shmat(shmid, 0, 0);
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memset(shmaddr, 0, SHM_SIZE);
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memcpy(shmaddr, "Sender Hello!", 14);
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int pid = fork();
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if (pid == 0)
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{
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execl("/bin/test_shm_receiver", NULL, NULL);
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}
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waitpid(pid, NULL, 0);
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char read_buf[20];
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memcpy(read_buf, shmaddr, 16);
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printf("Sender receive: %s\n", read_buf);
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shmdt(shmaddr);
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shmctl(shmid, IPC_RMID, NULL);
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}
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161
user/apps/test_shm/test_info.c
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user/apps/test_shm/test_info.c
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/shm.h>
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#include <sys/ipc.h>
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#include <string.h>
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#include <sys/wait.h>
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void print_shmidds(struct shmid_ds *shminfo)
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{
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struct ipc_perm shm_perm = shminfo->shm_perm;
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printf("ipc_perm:\n");
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printf("ipc_perm_key: %d\n", shm_perm.__key);
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printf("uid: %d\n", shm_perm.uid);
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printf("gid: %d\n", shm_perm.gid);
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printf("cuid: %d\n", shm_perm.cuid);
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printf("cgid: %d\n", shm_perm.cgid);
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printf("mode: %d\n", shm_perm.mode);
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printf("seq: %d\n", shm_perm.__seq);
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printf("\n");
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printf("shmid_ds:\n");
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printf("shm_atime: %lu\n", shminfo->shm_atime);
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printf("shm_dtime: %lu\n", shminfo->shm_dtime);
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printf("shm_ctime: %lu\n", shminfo->shm_ctime);
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printf("shm_segsz: %lu\n", shminfo->shm_segsz);
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printf("shm_cpid: %d\n", shminfo->shm_cpid);
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printf("shm_lpid: %d\n", shminfo->shm_lpid);
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printf("shm_nattch: %lu\n", shminfo->shm_nattch);
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printf("\n");
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}
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const int SHM_SIZE = 9999;
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int main()
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{
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int shmid;
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char *shmaddr;
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key_t key = 6666;
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// 测试shmget
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shmid = shmget(key, SHM_SIZE, 0666 | IPC_CREAT);
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if (shmid < 0)
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{
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perror("shmget failed");
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exit(EXIT_FAILURE);
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}
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// 测试shmat
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shmaddr = shmat(shmid, 0, 0);
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// IPC_STAT:
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printf("\n");
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printf("IPC_STAT:\n");
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struct shmid_ds shminfo2;
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if (shmctl(shmid, IPC_STAT, &shminfo2) == -1)
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{
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// 获取共享内存段信息
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perror("shmctl");
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exit(EXIT_FAILURE);
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}
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print_shmidds(&shminfo2);
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// 测试shmctl
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// IPC_INFO
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printf("IPC_INFO:\n");
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struct shminfo shmmetainfo;
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if (shmctl(shmid, IPC_INFO, &shmmetainfo) == -1)
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{ // 获取共享内存段信息
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perror("shmctl");
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exit(EXIT_FAILURE);
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}
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printf("shmmax: %lu\n", shmmetainfo.shmmax);
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printf("shmmin: %lu\n", shmmetainfo.shmmin);
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printf("shmmni: %lu\n", shmmetainfo.shmmni);
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printf("shmseg: %lu\n", shmmetainfo.shmseg);
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printf("shmall: %lu\n", shmmetainfo.shmall);
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// SHM_INFO
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printf("\n");
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printf("SHM_INFO:\n");
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struct shm_info shm_info;
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if (shmctl(shmid, SHM_INFO, &shm_info) == -1)
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{ // 获取共享内存段信息
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perror("shmctl");
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exit(EXIT_FAILURE);
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}
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printf("__used_ids: %lu\n", shm_info.__used_ids);
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printf("shm_tot: %lu\n", shm_info.shm_tot);
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printf("shm_rss: %lu\n", shm_info.shm_rss);
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printf("shm_swp: %lu\n", shm_info.shm_swp);
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printf("__swap_attempts: %lu\n", shm_info.__swap_attempts);
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printf("__swap_successes: %lu\n", shm_info.__swap_successes);
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// SHM_STAT
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printf("\n");
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printf("SHM_STAT:\n");
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struct shmid_ds shminfo0;
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if (shmctl(shmid, SHM_STAT, &shminfo0) == -1)
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{ // 获取共享内存段信息
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perror("shmctl");
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exit(EXIT_FAILURE);
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}
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print_shmidds(&shminfo0);
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// SHM_STAT_ANY
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printf("SHM_STAT_ANY:\n");
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struct shmid_ds shminfo1;
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if (shmctl(shmid, SHM_STAT_ANY, &shminfo1) == -1)
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{ // 获取共享内存段信息
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perror("shmctl");
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exit(EXIT_FAILURE);
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}
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print_shmidds(&shminfo1);
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// IPC_SET
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printf("\n");
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printf("IPC_SET:\n");
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struct shmid_ds shminfo;
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shminfo.shm_atime = 1;
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shminfo.shm_dtime = 2;
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shminfo.shm_ctime = 3;
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shminfo.shm_segsz = 4;
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shminfo.shm_cpid = 5;
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shminfo.shm_lpid = 6;
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shminfo.shm_nattch = 7;
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if (shmctl(shmid, IPC_SET, &shminfo) == -1)
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{ // 获取共享内存段信息
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perror("shmctl");
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exit(EXIT_FAILURE);
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}
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// IPC_RMID
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printf("\n");
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printf("IPC_RMID:\n");
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if (shmctl(shmid, IPC_RMID, NULL) == -1)
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{ // 获取共享内存段信息
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perror("shmctl");
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exit(EXIT_FAILURE);
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}
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// SHM_LOCK
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printf("\n");
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printf("SHM_LOCK:\n");
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if (shmctl(shmid, SHM_LOCK, NULL) == -1)
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{ // 获取共享内存段信息
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perror("shmctl");
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exit(EXIT_FAILURE);
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}
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// SHM_UNLOCK
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printf("\n");
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printf("SHM_UNLOCK:\n");
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if (shmctl(shmid, SHM_UNLOCK, NULL) == -1)
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{ // 获取共享内存段信息
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perror("shmctl");
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exit(EXIT_FAILURE);
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}
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}
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