diff options
Diffstat (limited to 'hurd')
| -rw-r--r-- | hurd/report-wait.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/hurd/report-wait.c b/hurd/report-wait.c new file mode 100644 index 0000000..521c522 --- /dev/null +++ b/hurd/report-wait.c @@ -0,0 +1,146 @@ +/* Report on what a thread in our task is waiting for. +Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <hurd.h> +#include <hurd/signal.h> +#include <hurd/fd.h> +#include <string.h> +#include <assert.h> +#include <hurd/msg_server.h> +#include "thread_state.h" +#include "intr-msg.h" + +static void +describe_number (string_t description, const char *flavor, int i) +{ + char *p = __stpcpy (description, flavor); + p += i / 10 + 1; + *p = '\0'; + do + { + *--p = '0' + i % 10; + i /= 10; + } while (i != 0); + assert (p[-1] == '#'); +} + +static void +describe_port (string_t description, mach_port_t port) +{ + int i; + + if (port == __mach_task_self ()) + { + strcpy (description, "task-self"); + return; + } + + for (i = 0; i < _hurd_nports; ++i) + if (port == _hurd_ports[i].port) + { + describe_number (description, "init#", i); + return; + } + + if (_hurd_init_dtable) + { + for (i = 0; i < _hurd_init_dtablesize; ++i) + if (port == _hurd_init_dtable[i]) + { + describe_number (description, "fd#", i); + return; + } + } + else if (_hurd_dtable) + { + for (i = 0; i < _hurd_dtablesize; ++i) + if (_hurd_dtable[i] == NULL) + continue; + else if (port == _hurd_dtable[i]->port.port) + { + describe_number (description, "fd#", i); + return; + } + else if (port == _hurd_dtable[i]->ctty.port) + { + describe_number (description, "bgfd#", i); + return; + } + } + + describe_number (description, "port#", port); +} + + +kern_return_t +_S_msg_report_wait (mach_port_t msgport, thread_t thread, + string_t description, int *msgid) +{ + *msgid = 0; + + if (thread == _hurd_msgport_thread) + /* Cute. */ + strcpy (description, "msgport"); + else + { + /* Make sure this is really one of our threads. */ + + struct hurd_sigstate *ss; + + __mutex_lock (&_hurd_siglock); + for (ss = _hurd_sigstates; ss != NULL; ss = ss->next) + if (ss->thread == thread) + break; + __mutex_unlock (&_hurd_siglock); + if (ss == NULL) + /* To hell with you. */ + return EINVAL; + + if (ss->suspended != MACH_PORT_NULL) + strcpy (description, "sigsuspend"); + else + { + /* Examine the thread's state to see if it is blocked in an RPC. */ + + struct machine_thread_state state; + mach_msg_type_number_t count = MACHINE_THREAD_STATE_COUNT; + error_t err; + + err = __thread_get_state (thread, MACHINE_THREAD_STATE_FLAVOR, + (integer_t *) &state, &count); + if (err) + return err; + assert (count == MACHINE_THREAD_STATE_COUNT); + if (SYSCALL_EXAMINE (&state, msgid)) + { + /* Blocked in a system call. */ + if (*msgid == -25) + /* mach_msg system call. Examine its parameters. */ + describe_port (description, MSG_EXAMINE (&state, msgid)); + else + strcpy (description, "kernel"); + } + else + description[0] = '\0'; + } + } + + __mach_port_deallocate (__mach_task_self (), thread); + return 0; +} |