466 lines
14 KiB
C
466 lines
14 KiB
C
/*
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* Server-side process management
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*
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* Copyright (C) 1998 Alexandre Julliard
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*/
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#include <assert.h>
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#include <limits.h>
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#include <signal.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include "winerror.h"
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#include "winbase.h"
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#include "winnt.h"
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#include "server.h"
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#include "handle.h"
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#include "process.h"
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#include "thread.h"
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/* process structure */
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static struct process initial_process;
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static struct process *first_process = &initial_process;
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static int running_processes;
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/* process operations */
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static void process_dump( struct object *obj, int verbose );
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static int process_signaled( struct object *obj, struct thread *thread );
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static void process_destroy( struct object *obj );
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static const struct object_ops process_ops =
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{
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process_dump,
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add_queue,
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remove_queue,
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process_signaled,
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no_satisfied,
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no_read_fd,
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no_write_fd,
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no_flush,
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no_get_file_info,
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process_destroy
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};
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/* initialization of a process structure */
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static void init_process( struct process *process )
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{
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init_object( &process->obj, &process_ops, NULL );
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process->next = NULL;
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process->prev = NULL;
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process->thread_list = NULL;
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process->debug_next = NULL;
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process->debug_prev = NULL;
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process->debugger = NULL;
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process->exit_code = 0x103; /* STILL_ACTIVE */
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process->running_threads = 0;
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process->priority = NORMAL_PRIORITY_CLASS;
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process->affinity = 1;
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process->suspend = 0;
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process->console_in = NULL;
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process->console_out = NULL;
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process->info = NULL;
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gettimeofday( &process->start_time, NULL );
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/* alloc a handle for the process itself */
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alloc_handle( process, process, PROCESS_ALL_ACCESS, 0 );
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}
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/* create the initial process */
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struct process *create_initial_process(void)
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{
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struct new_process_request *info;
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copy_handle_table( &initial_process, NULL );
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init_process( &initial_process );
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if (!alloc_console( &initial_process )) return NULL;
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if (!(info = mem_alloc( sizeof(*info) ))) return NULL;
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info->start_flags = STARTF_USESTDHANDLES;
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info->hstdin = alloc_handle( &initial_process, initial_process.console_in,
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GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE, 1 );
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info->hstdout = alloc_handle( &initial_process, initial_process.console_out,
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GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE, 1 );
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info->hstderr = alloc_handle( &initial_process, initial_process.console_out,
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GENERIC_READ | GENERIC_WRITE | SYNCHRONIZE, 1 );
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info->env_ptr = NULL;
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initial_process.info = info;
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grab_object( &initial_process ); /* so that we never free it */
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return &initial_process;
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}
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/* create a new process */
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static struct process *create_process( struct new_process_request *req )
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{
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struct process *process = NULL;
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struct process *parent = current->process;
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if (!(process = mem_alloc( sizeof(*process) ))) return NULL;
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if (!copy_handle_table( process, req->inherit_all ? parent : NULL ))
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{
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free( process );
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return NULL;
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}
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init_process( process );
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if (!(process->info = mem_alloc( sizeof(*process->info) ))) goto error;
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memcpy( process->info, req, sizeof(*req) );
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/* set the process console */
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if (req->create_flags & CREATE_NEW_CONSOLE)
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{
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if (!alloc_console( process )) goto error;
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}
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else if (!(req->create_flags & DETACHED_PROCESS))
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{
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if (parent->console_in) process->console_in = grab_object( parent->console_in );
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if (parent->console_out) process->console_out = grab_object( parent->console_out );
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}
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if (!req->inherit_all && !(req->start_flags & STARTF_USESTDHANDLES))
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{
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process->info->hstdin = duplicate_handle( parent, req->hstdin, process,
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0, TRUE, DUPLICATE_SAME_ACCESS );
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process->info->hstdout = duplicate_handle( parent, req->hstdout, process,
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0, TRUE, DUPLICATE_SAME_ACCESS );
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process->info->hstderr = duplicate_handle( parent, req->hstderr, process,
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0, TRUE, DUPLICATE_SAME_ACCESS );
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}
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/* attach to the debugger if requested */
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if (req->create_flags & DEBUG_PROCESS)
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debugger_attach( process, current );
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else if (parent->debugger && !(req->create_flags & DEBUG_ONLY_THIS_PROCESS))
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debugger_attach( process, parent->debugger );
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process->next = first_process;
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first_process->prev = process;
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first_process = process;
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return process;
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error:
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release_object( process );
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return NULL;
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}
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/* destroy a process when its refcount is 0 */
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static void process_destroy( struct object *obj )
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{
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struct process *process = (struct process *)obj;
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assert( obj->ops == &process_ops );
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assert( process != &initial_process );
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/* we can't have a thread remaining */
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assert( !process->thread_list );
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if (process->next) process->next->prev = process->prev;
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if (process->prev) process->prev->next = process->next;
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else first_process = process->next;
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free_console( process );
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free_handles( process );
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if (process->info) free( process->info );
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if (debug_level) memset( process, 0xbb, sizeof(process) ); /* catch errors */
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free( process );
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}
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/* dump a process on stdout for debugging purposes */
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static void process_dump( struct object *obj, int verbose )
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{
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struct process *process = (struct process *)obj;
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assert( obj->ops == &process_ops );
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printf( "Process next=%p prev=%p\n", process->next, process->prev );
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}
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static int process_signaled( struct object *obj, struct thread *thread )
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{
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struct process *process = (struct process *)obj;
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return !process->running_threads;
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}
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/* get a process from an id (and increment the refcount) */
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struct process *get_process_from_id( void *id )
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{
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struct process *p = first_process;
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while (p && (p != id)) p = p->next;
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if (p) grab_object( p );
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else SET_ERROR( ERROR_INVALID_PARAMETER );
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return p;
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}
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/* get a process from a handle (and increment the refcount) */
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struct process *get_process_from_handle( int handle, unsigned int access )
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{
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return (struct process *)get_handle_obj( current->process, handle,
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access, &process_ops );
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}
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/* retrieve the initialization info for a new process */
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static int get_process_init_info( struct process *process, struct init_process_reply *reply )
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{
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struct new_process_request *info;
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if (!(info = process->info)) return 0;
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process->info = NULL;
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reply->start_flags = info->start_flags;
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reply->hstdin = info->hstdin;
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reply->hstdout = info->hstdout;
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reply->hstderr = info->hstderr;
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reply->env_ptr = info->env_ptr;
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free( info );
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return 1;
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}
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/* a process has been killed (i.e. its last thread died) */
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static void process_killed( struct process *process, int exit_code )
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{
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assert( !process->thread_list );
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process->exit_code = exit_code;
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gettimeofday( &process->end_time, NULL );
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wake_up( &process->obj, 0 );
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free_handles( process );
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}
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/* add a thread to a process running threads list */
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void add_process_thread( struct process *process, struct thread *thread )
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{
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thread->proc_next = process->thread_list;
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thread->proc_prev = NULL;
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if (thread->proc_next) thread->proc_next->proc_prev = thread;
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process->thread_list = thread;
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if (!process->running_threads++) running_processes++;
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grab_object( thread );
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}
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/* remove a thread from a process running threads list */
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void remove_process_thread( struct process *process, struct thread *thread )
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{
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assert( process->running_threads > 0 );
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assert( process->thread_list );
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if (thread->proc_next) thread->proc_next->proc_prev = thread->proc_prev;
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if (thread->proc_prev) thread->proc_prev->proc_next = thread->proc_next;
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else process->thread_list = thread->proc_next;
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if (!--process->running_threads)
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{
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/* we have removed the last running thread, exit the process */
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running_processes--;
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process_killed( process, thread->exit_code );
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}
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release_object( thread );
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}
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/* suspend all the threads of a process */
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void suspend_process( struct process *process )
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{
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if (!process->suspend++)
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{
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struct thread *thread = process->thread_list;
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for (; thread; thread = thread->proc_next)
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{
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if (!thread->suspend && thread->unix_pid)
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kill( thread->unix_pid, SIGSTOP );
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}
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}
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}
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/* resume all the threads of a process */
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void resume_process( struct process *process )
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{
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assert (process->suspend > 0);
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if (!--process->suspend)
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{
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struct thread *thread = process->thread_list;
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for (; thread; thread = thread->proc_next)
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{
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if (!thread->suspend && thread->unix_pid)
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kill( thread->unix_pid, SIGCONT );
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}
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}
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}
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/* kill a process on the spot */
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void kill_process( struct process *process, int exit_code )
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{
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while (process->thread_list)
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kill_thread( process->thread_list, exit_code );
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}
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/* get all information about a process */
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static void get_process_info( struct process *process,
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struct get_process_info_reply *reply )
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{
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reply->pid = process;
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reply->exit_code = process->exit_code;
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reply->priority = process->priority;
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reply->process_affinity = process->affinity;
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reply->system_affinity = 1;
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}
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/* set all information about a process */
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static void set_process_info( struct process *process,
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struct set_process_info_request *req )
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{
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if (req->mask & SET_PROCESS_INFO_PRIORITY)
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process->priority = req->priority;
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if (req->mask & SET_PROCESS_INFO_AFFINITY)
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{
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if (req->affinity != 1) SET_ERROR( ERROR_INVALID_PARAMETER );
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else process->affinity = req->affinity;
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}
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}
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/* allocate a console for this process */
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int alloc_console( struct process *process )
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{
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struct object *obj[2];
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if (process->console_in || process->console_out)
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{
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SET_ERROR( ERROR_ACCESS_DENIED );
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return 0;
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}
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if (!create_console( -1, obj )) return 0;
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process->console_in = obj[0];
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process->console_out = obj[1];
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return 1;
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}
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/* free the console for this process */
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int free_console( struct process *process )
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{
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if (process->console_in) release_object( process->console_in );
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if (process->console_out) release_object( process->console_out );
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process->console_in = process->console_out = NULL;
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return 1;
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}
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/* get the process console */
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struct object *get_console( struct process *process, int output )
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{
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struct object *obj;
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if (!(obj = output ? process->console_out : process->console_in))
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return NULL;
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return grab_object( obj );
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}
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/* take a snapshot of currently running processes */
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struct process_snapshot *process_snap( int *count )
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{
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struct process_snapshot *snapshot, *ptr;
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struct process *process;
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if (!running_processes) return NULL;
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if (!(snapshot = mem_alloc( sizeof(*snapshot) * running_processes )))
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return NULL;
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ptr = snapshot;
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for (process = first_process; process; process = process->next)
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{
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if (!process->running_threads) continue;
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ptr->process = process;
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ptr->threads = process->running_threads;
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ptr->priority = process->priority;
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grab_object( process );
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ptr++;
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}
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*count = running_processes;
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return snapshot;
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}
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/* create a new process */
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DECL_HANDLER(new_process)
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{
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struct new_process_reply reply;
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struct process *process;
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if ((process = create_process( req )))
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{
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reply.pid = process;
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reply.handle = alloc_handle( current->process, process,
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PROCESS_ALL_ACCESS, req->inherit );
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release_object( process );
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}
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else
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{
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reply.handle = -1;
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reply.pid = NULL;
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}
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send_reply( current, -1, 1, &reply, sizeof(reply) );
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}
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/* initialize a new process */
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DECL_HANDLER(init_process)
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{
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struct init_process_reply reply;
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if (current->state != RUNNING)
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{
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fatal_protocol_error( "init_process: init_thread not called yet\n" );
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return;
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}
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if (!get_process_init_info( current->process, &reply ))
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{
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fatal_protocol_error( "init_process: called twice\n" );
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return;
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}
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send_reply( current, -1, 1, &reply, sizeof(reply) );
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}
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/* open a handle to a process */
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DECL_HANDLER(open_process)
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{
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struct open_process_reply reply = { -1 };
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struct process *process = get_process_from_id( req->pid );
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if (process)
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{
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reply.handle = alloc_handle( current->process, process,
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req->access, req->inherit );
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release_object( process );
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}
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send_reply( current, -1, 1, &reply, sizeof(reply) );
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}
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/* terminate a process */
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DECL_HANDLER(terminate_process)
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{
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struct process *process;
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if ((process = get_process_from_handle( req->handle, PROCESS_TERMINATE )))
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{
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kill_process( process, req->exit_code );
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release_object( process );
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}
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if (current) send_reply( current, -1, 0 );
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}
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/* fetch information about a process */
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DECL_HANDLER(get_process_info)
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{
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struct process *process;
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struct get_process_info_reply reply = { 0, 0, 0 };
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if ((process = get_process_from_handle( req->handle, PROCESS_QUERY_INFORMATION )))
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{
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get_process_info( process, &reply );
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release_object( process );
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}
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send_reply( current, -1, 1, &reply, sizeof(reply) );
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}
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/* set information about a process */
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DECL_HANDLER(set_process_info)
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{
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struct process *process;
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if ((process = get_process_from_handle( req->handle, PROCESS_SET_INFORMATION )))
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{
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set_process_info( process, req );
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release_object( process );
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}
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send_reply( current, -1, 0 );
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}
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