blob: 08e3397693f251ea505411f484508c44ec8b9e44 [file] [log] [blame]
#include "defs.h"
#include <sys/wait.h>
#ifndef __WNOTHREAD
# define __WNOTHREAD 0x20000000
#endif
#ifndef __WALL
# define __WALL 0x40000000
#endif
#ifndef __WCLONE
# define __WCLONE 0x80000000
#endif
#include "xlat/wait4_options.h"
#if !defined WCOREFLAG && defined WCOREFLG
# define WCOREFLAG WCOREFLG
#endif
#ifndef WCOREFLAG
# define WCOREFLAG 0x80
#endif
#ifndef WCOREDUMP
# define WCOREDUMP(status) ((status) & 0200)
#endif
#ifndef W_STOPCODE
# define W_STOPCODE(sig) ((sig) << 8 | 0x7f)
#endif
#ifndef W_EXITCODE
# define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
#endif
#ifndef W_CONTINUED
# define W_CONTINUED 0xffff
#endif
#include "ptrace.h"
#include "xlat/ptrace_events.h"
static int
printstatus(int status)
{
int exited = 0;
/*
* Here is a tricky presentation problem. This solution
* is still not entirely satisfactory but since there
* are no wait status constructors it will have to do.
*/
if (WIFSTOPPED(status)) {
int sig = WSTOPSIG(status);
tprintf("[{WIFSTOPPED(s) && WSTOPSIG(s) == %s%s}",
signame(sig & 0x7f),
sig & 0x80 ? " | 0x80" : "");
status &= ~W_STOPCODE(sig);
}
else if (WIFSIGNALED(status)) {
tprintf("[{WIFSIGNALED(s) && WTERMSIG(s) == %s%s}",
signame(WTERMSIG(status)),
WCOREDUMP(status) ? " && WCOREDUMP(s)" : "");
status &= ~(W_EXITCODE(0, WTERMSIG(status)) | WCOREFLAG);
}
else if (WIFEXITED(status)) {
tprintf("[{WIFEXITED(s) && WEXITSTATUS(s) == %d}",
WEXITSTATUS(status));
exited = 1;
status &= ~W_EXITCODE(WEXITSTATUS(status), 0);
}
#ifdef WIFCONTINUED
else if (WIFCONTINUED(status)) {
tprints("[{WIFCONTINUED(s)}");
status &= ~W_CONTINUED;
}
#endif
else {
tprintf("[%#x]", status);
return 0;
}
if (status) {
unsigned int event = (unsigned int) status >> 16;
if (event) {
tprints(" | ");
printxval(ptrace_events, event, "PTRACE_EVENT_???");
tprints(" << 16");
status &= 0xffff;
}
if (status)
tprintf(" | %#x", status);
}
tprints("]");
return exited;
}
static int
printwaitn(struct tcb *tcp, int n, int bitness)
{
int status;
if (entering(tcp)) {
/* On Linux, kernel-side pid_t is typedef'ed to int
* on all arches. Also, glibc-2.8 truncates wait3 and wait4
* pid argument to int on 64bit arches, producing,
* for example, wait4(4294967295, ...) instead of -1
* in strace. We have to use int here, not long.
*/
int pid = tcp->u_arg[0];
tprintf("%d, ", pid);
} else {
/* status */
if (!tcp->u_arg[1])
tprints("NULL");
else if (syserror(tcp) || tcp->u_rval == 0)
tprintf("%#lx", tcp->u_arg[1]);
else if (umove(tcp, tcp->u_arg[1], &status) < 0)
tprints("[?]");
else
printstatus(status);
/* options */
tprints(", ");
printflags(wait4_options, tcp->u_arg[2], "W???");
if (n == 4) {
tprints(", ");
/* usage */
if (!tcp->u_arg[3])
tprints("NULL");
else if (tcp->u_rval > 0) {
#ifdef ALPHA
if (bitness)
printrusage32(tcp, tcp->u_arg[3]);
else
#endif
printrusage(tcp, tcp->u_arg[3]);
}
else
tprintf("%#lx", tcp->u_arg[3]);
}
}
return 0;
}
int
sys_waitpid(struct tcb *tcp)
{
return printwaitn(tcp, 3, 0);
}
int
sys_wait4(struct tcb *tcp)
{
return printwaitn(tcp, 4, 0);
}
#ifdef ALPHA
int
sys_osf_wait4(struct tcb *tcp)
{
return printwaitn(tcp, 4, 1);
}
#endif
#include "xlat/waitid_types.h"
int
sys_waitid(struct tcb *tcp)
{
if (entering(tcp)) {
printxval(waitid_types, tcp->u_arg[0], "P_???");
tprintf(", %ld, ", tcp->u_arg[1]);
}
else {
/* siginfo */
printsiginfo_at(tcp, tcp->u_arg[2]);
/* options */
tprints(", ");
printflags(wait4_options, tcp->u_arg[3], "W???");
if (tcp->s_ent->nargs > 4) {
/* usage */
tprints(", ");
if (!tcp->u_arg[4])
tprints("NULL");
else if (tcp->u_error)
tprintf("%#lx", tcp->u_arg[4]);
else
printrusage(tcp, tcp->u_arg[4]);
}
}
return 0;
}