144 lines
2.6 KiB
C
144 lines
2.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2020 ARM Limited
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#define _GNU_SOURCE
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#include <errno.h>
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#include <pthread.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/auxv.h>
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#include <sys/mman.h>
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#include <sys/prctl.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include "kselftest.h"
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#include "mte_common_util.h"
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#include "mte_def.h"
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#define NUM_ITERATIONS 1024
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#define MAX_THREADS 5
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#define THREAD_ITERATIONS 1000
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void *execute_thread(void *x)
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{
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pid_t pid = *((pid_t *)x);
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pid_t tid = gettid();
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uint64_t prctl_tag_mask;
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uint64_t prctl_set;
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uint64_t prctl_get;
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uint64_t prctl_tcf;
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srand(time(NULL) ^ (pid << 16) ^ (tid << 16));
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prctl_tag_mask = rand() & 0xffff;
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if (prctl_tag_mask % 2)
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prctl_tcf = PR_MTE_TCF_SYNC;
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else
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prctl_tcf = PR_MTE_TCF_ASYNC;
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prctl_set = PR_TAGGED_ADDR_ENABLE | prctl_tcf | (prctl_tag_mask << PR_MTE_TAG_SHIFT);
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for (int j = 0; j < THREAD_ITERATIONS; j++) {
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if (prctl(PR_SET_TAGGED_ADDR_CTRL, prctl_set, 0, 0, 0)) {
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perror("prctl() failed");
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goto fail;
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}
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prctl_get = prctl(PR_GET_TAGGED_ADDR_CTRL, 0, 0, 0, 0);
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if (prctl_set != prctl_get) {
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ksft_print_msg("Error: prctl_set: 0x%lx != prctl_get: 0x%lx\n",
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prctl_set, prctl_get);
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goto fail;
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}
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}
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return (void *)KSFT_PASS;
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fail:
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return (void *)KSFT_FAIL;
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}
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int execute_test(pid_t pid)
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{
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pthread_t thread_id[MAX_THREADS];
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int thread_data[MAX_THREADS];
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for (int i = 0; i < MAX_THREADS; i++)
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pthread_create(&thread_id[i], NULL,
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execute_thread, (void *)&pid);
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for (int i = 0; i < MAX_THREADS; i++)
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pthread_join(thread_id[i], (void *)&thread_data[i]);
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for (int i = 0; i < MAX_THREADS; i++)
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if (thread_data[i] == KSFT_FAIL)
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return KSFT_FAIL;
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return KSFT_PASS;
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}
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int mte_gcr_fork_test(void)
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{
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pid_t pid;
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int results[NUM_ITERATIONS];
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pid_t cpid;
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int res;
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for (int i = 0; i < NUM_ITERATIONS; i++) {
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pid = fork();
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if (pid < 0)
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return KSFT_FAIL;
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if (pid == 0) {
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cpid = getpid();
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res = execute_test(cpid);
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exit(res);
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}
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}
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for (int i = 0; i < NUM_ITERATIONS; i++) {
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wait(&res);
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if (WIFEXITED(res))
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results[i] = WEXITSTATUS(res);
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else
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--i;
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}
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for (int i = 0; i < NUM_ITERATIONS; i++)
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if (results[i] == KSFT_FAIL)
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return KSFT_FAIL;
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return KSFT_PASS;
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}
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int main(int argc, char *argv[])
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{
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int err;
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err = mte_default_setup();
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if (err)
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return err;
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ksft_set_plan(1);
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evaluate_test(mte_gcr_fork_test(),
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"Verify that GCR_EL1 is set correctly on context switch\n");
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mte_restore_setup();
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ksft_print_cnts();
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return ksft_get_fail_cnt() == 0 ? KSFT_PASS : KSFT_FAIL;
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}
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