| kern_exit.c (edf6699ae624a4f38c6fada19397372caadfa9e5) | kern_exit.c (5215b1872feaad7ecf7cb1234749ecf04071deef) |
|---|---|
| 1/* 2 * Copyright (c) 1982, 1986, 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. --- 133 unchanged lines hidden (view full) --- 142 p = td->td_proc; 143 if (p == initproc) { 144 printf("init died (signal %d, exit %d)\n", 145 WTERMSIG(rv), WEXITSTATUS(rv)); 146 panic("Going nowhere without my init!"); 147 } 148 149 /* | 1/* 2 * Copyright (c) 1982, 1986, 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. --- 133 unchanged lines hidden (view full) --- 142 p = td->td_proc; 143 if (p == initproc) { 144 printf("init died (signal %d, exit %d)\n", 145 WTERMSIG(rv), WEXITSTATUS(rv)); 146 panic("Going nowhere without my init!"); 147 } 148 149 /* |
| 150 * XXXXKSE: MUST abort all other threads before proceeding past here. | 150 * XXXKSE: MUST abort all other threads before proceeding past here. |
| 151 */ 152 PROC_LOCK(p); 153 if (p->p_flag & P_KSES) { 154 /* 155 * First check if some other thread got here before us.. 156 * if so, act apropriatly, (exit or suspend); 157 */ 158 thread_suspend_check(0); | 151 */ 152 PROC_LOCK(p); 153 if (p->p_flag & P_KSES) { 154 /* 155 * First check if some other thread got here before us.. 156 * if so, act apropriatly, (exit or suspend); 157 */ 158 thread_suspend_check(0); |
| 159 /* 160 * Here is a trick.. 161 * We need to free up our KSE to process other threads 162 * so that we can safely set the UNBOUND flag 163 * (whether or not we have a mailbox) as we are NEVER 164 * going to return to the user. 165 * The flag will not be set yet if we are exiting 166 * because of a signal, pagefault, or similar 167 * (or even an exit(2) from the UTS). 168 */ 169 td->td_flags |= TDF_UNBOUND; | |
| 170 171 /* 172 * Kill off the other threads. This requires 173 * Some co-operation from other parts of the kernel 174 * so it may not be instant. 175 * With this state set: 176 * Any thread entering the kernel from userspace will 177 * thread_exit() in trap(). Any thread attempting to --- 9 unchanged lines hidden (view full) --- 187 } 188 /* 189 * All other activity in this process is now stopped. 190 * Remove excess KSEs and KSEGRPS. XXXKSE (when we have them) 191 * ... 192 * Turn off threading support. 193 */ 194 p->p_flag &= ~P_KSES; | 159 160 /* 161 * Kill off the other threads. This requires 162 * Some co-operation from other parts of the kernel 163 * so it may not be instant. 164 * With this state set: 165 * Any thread entering the kernel from userspace will 166 * thread_exit() in trap(). Any thread attempting to --- 9 unchanged lines hidden (view full) --- 176 } 177 /* 178 * All other activity in this process is now stopped. 179 * Remove excess KSEs and KSEGRPS. XXXKSE (when we have them) 180 * ... 181 * Turn off threading support. 182 */ 183 p->p_flag &= ~P_KSES; |
| 195 td->td_flags &= ~TDF_UNBOUND; | |
| 196 thread_single_end(); /* Don't need this any more. */ 197 } 198 /* 199 * With this state set: 200 * Any thread entering the kernel from userspace will thread_exit() 201 * in trap(). Any thread attempting to sleep will return immediatly 202 * with EINTR or EWOULDBLOCK, which will hopefully force them 203 * to back out to userland, freeing resources as they go, and --- 676 unchanged lines hidden --- | 184 thread_single_end(); /* Don't need this any more. */ 185 } 186 /* 187 * With this state set: 188 * Any thread entering the kernel from userspace will thread_exit() 189 * in trap(). Any thread attempting to sleep will return immediatly 190 * with EINTR or EWOULDBLOCK, which will hopefully force them 191 * to back out to userland, freeing resources as they go, and --- 676 unchanged lines hidden --- |