118 lines
2.3 KiB
C
118 lines
2.3 KiB
C
#include <unistd.h>
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#include <stdio.h>
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#include <sys/mman.h>
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#include <semaphore.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/ptrace.h>
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#include <sys/wait.h>
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#include "./test_chk.h"
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#define TEST_NAME "CT_004"
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int main(int argc, char** argv)
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{
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pid_t pid = 0;
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sem_t *pwait = NULL;
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sem_t *cwait = NULL;
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void *mem, *attach;
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int rc = 0;
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int status;
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printf("*** %s start *******************************\n", TEST_NAME);
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pwait = (sem_t *)mmap(NULL, sizeof(sem_t), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
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cwait = (sem_t *)mmap(NULL, sizeof(sem_t), PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
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CHKANDJUMP(!pwait || !cwait, "mmap for sem");
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rc |= sem_init(pwait, 1, 0);
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rc |= sem_init(cwait, 1, 0);
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CHKANDJUMP(rc, "sem_init");
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pid = fork();
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CHKANDJUMP(pid == -1, "fork");
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if (pid == 0) { /* child */
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/* wake parent */
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sem_post(pwait);
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/* wait */
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sem_wait(cwait);
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/* wake parent */
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sem_post(pwait);
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/* wait */
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sem_wait(cwait);
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/* wake parent */
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sem_post(pwait);
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/* wait */
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sem_wait(cwait);
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_exit(123);
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} else { /* parent */
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/* wait */
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sem_wait(pwait);
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/* attach child */
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rc = ptrace(PTRACE_ATTACH, pid, NULL, NULL);
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OKNG(rc != 0, "ptrace_attach");
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/* wake child */
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sem_post(cwait);
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/* wait child stop */
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rc = waitpid(pid, &status, 0);
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CHKANDJUMP(rc == -1, "waitpid");
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CHKANDJUMP(!WIFSTOPPED(status), "child is not stopped");
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/* detach child */
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rc = ptrace(PTRACE_DETACH, pid, NULL, NULL);
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OKNG(rc != 0, "ptrace_detach");
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/* wait */
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sem_wait(pwait);
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/* attach child */
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rc = ptrace(PTRACE_ATTACH, pid, NULL, NULL);
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OKNG(rc != 0, "ptrace_attach again");
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/* wake child */
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sem_post(cwait);
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/* wait child stop */
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rc = waitpid(pid, &status, 0);
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CHKANDJUMP(rc == -1, "waitpid");
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CHKANDJUMP(!WIFSTOPPED(status), "child is not stopped again");
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/* detach child */
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rc = ptrace(PTRACE_DETACH, pid, NULL, NULL);
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OKNG(rc != 0, "ptrace_detach again");
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/* wake child */
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sem_post(cwait);
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/* wait child's exit */
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rc = waitpid(pid, &status, 0);
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CHKANDJUMP(rc == -1, "waitpid");
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CHKANDJUMP(!WIFEXITED(status), "child is not exited");
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}
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printf("*** %s PASSED\n\n", TEST_NAME);
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return 0;
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fn_fail:
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printf("*** %s FAILED\n\n", TEST_NAME);
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return -1;
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}
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