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/*
* Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/proc.h>
#include <sys/mman.h>
#include <sys/errno.h>
#include <sys/syslog.h>
#include <sys/atomic.h>
#include <sys/signal.h>
#include <sys/sched.h>
#include <vm/dynalloc.h>
#include <string.h>
#define pr_trace(fmt, ...) kprintf("spawn: " fmt, ##__VA_ARGS__)
#define pr_error(...) pr_trace(__VA_ARGS__)
static volatile size_t nthreads = 0;
/*
* Spawn a new process
*
* @cur: Parent (current) process.
* @flags: Spawn flags.
* @ip: Location for process to start
* @newprocp: If not NULL, will contain the new process.
*/
int
spawn(struct proc *cur, int flags, void(*ip)(void), struct proc **newprocp)
{
struct proc *newproc;
struct mmap_lgdr *mlgdr;
int error;
newproc = dynalloc(sizeof(*newproc));
if (newproc == NULL) {
pr_error("could not alloc proc (-ENOMEM)\n");
return -ENOMEM;
}
mlgdr = dynalloc(sizeof(*mlgdr));
if (mlgdr == NULL) {
dynfree(newproc);
pr_error("could not alloc proc mlgdr (-ENOMEM)\n");
return -ENOMEM;
}
memset(newproc, 0, sizeof(*newproc));
error = md_spawn(newproc, cur, (uintptr_t)ip);
if (error < 0) {
dynfree(newproc);
dynfree(mlgdr);
pr_error("error initializing proc\n");
return error;
}
/* Set proc output if we can */
if (newprocp != NULL) {
*newprocp = newproc;
}
/* Initialize the mmap ledger */
mlgdr->nbytes = 0;
RBT_INIT(lgdr_entries, &mlgdr->hd);
newproc->mlgdr = mlgdr;
newproc->pid = ++nthreads;
signals_init(newproc);
sched_enqueue_td(newproc);
return 0;
}
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