src/runtime/sunos-os.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <signal.h>
   4 #include <sys/file.h>
   5
   6 #include <unistd.h>
   7 #include <errno.h>
   8 #include <sys/param.h>
   9 #include <sys/utsname.h>
  10
  11 #include "sbcl.h"
  12 #include "os.h"
  13 #include "arch.h"
  14 #include "interr.h"
  15 #include "interrupt.h"
  16 #include "globals.h"
  17 #include "validate.h"
  18 #include "target-arch-os.h"
  19
  20 #ifdef LISP_FEATURE_X86
  21 #include "genesis/static-symbols.h"
  22 #include "genesis/fdefn.h"
  23 #endif
  24
  25 #ifdef LISP_FEATURE_GENCGC
  26 #include "gencgc-internal.h"
  27 #endif
  28
  29 #ifdef LISP_FEATURE_SB_WTIMER
  30 # include <port.h>
  31 # include <time.h>
  32 # include <errno.h>
  33 #endif
  34
  35 os_vm_size_t os_vm_page_size=0;
  36
  37 void
  38 os_init(char *argv[], char *envp[])
  39 {
  40     /*
  41      * historically, this used sysconf to select the runtime page size
  42      * per recent changes on other arches and discussion on sbcl-devel,
  43      * however, this is not necessary -- the VM page size need not match
  44      * the OS page size (and the default backend page size has been
  45      * ramped up accordingly for efficiency reasons).
  46      */
  47     os_vm_page_size = BACKEND_PAGE_BYTES;
  48 }
  49
  50 os_vm_address_t os_validate(boolean movable, os_vm_address_t addr, os_vm_size_t len)
  51 {
  52     int flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANON;
  53     if (addr)
  54         flags |= MAP_FIXED;
  55
  56     addr = mmap(addr, len, OS_VM_PROT_ALL, flags, -1, 0);
  57
  58     if (addr == MAP_FAILED) {
  59         perror("mmap");
  60         /* While it is generally hard to recover from out-of-memory
  61          * situations, we require callers to decide on the right course
  62          * of action here.  Consider thread creation: Failure to mmap
  63          * here is common if users have started too many threads, and
  64          * often we can recover from that and treat it as an ordinary
  65          * error. */
  66         return 0;
  67     }
  68
  69     return addr;
  70 }
  71
  72 void os_invalidate(os_vm_address_t addr, os_vm_size_t len)
  73 {
  74     if(munmap((void*) addr, len) == -1)
  75         perror("munmap");
  76 }
  77
  78 \f
  79 void
  80 os_protect(os_vm_address_t address, os_vm_size_t length, os_vm_prot_t prot)
  81 {
  82     if(mprotect((void*)address, length, prot) == -1) {
  83         perror("mprotect");
  84     }
  85 }
  86
  87 #if defined LISP_FEATURE_GENCGC
  88
  89 void
  90 sigsegv_handler(int signal, siginfo_t *info, os_context_t *context)
  91 {
  92     void* fault_addr = (void*)info->si_addr;
  93
  94 #ifdef LISP_FEATURE_SB_SAFEPOINT
  95     if (handle_safepoint_violation(context, fault_addr))
  96             return;
  97 #endif
  98
  99     if (!gencgc_handle_wp_violation(fault_addr))
 100         if(!handle_guard_page_triggered(context, fault_addr))
 101             lisp_memory_fault_error(context, fault_addr);
 102 }
 103
 104 #else
 105
 106 static void
 107 sigsegv_handler(int signal, siginfo_t *info, os_context_t *context)
 108 {
 109     os_vm_address_t addr = arch_get_bad_addr(signal, info, context);
 110
 111     if (!cheneygc_handle_wp_violation(context, addr)) {
 112         if (!handle_guard_page_triggered(context,addr))
 113             lisp_memory_fault_error(context, addr);
 114     }
 115 }
 116
 117 #endif
 118
 119 void
 120 os_install_interrupt_handlers()
 121 {
 122     undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT,
 123                                                  sigsegv_handler);
 124
 125     /* OAOOM c.f. linux-os.c.
 126      * Should we have a reusable function gc_install_interrupt_handlers? */
 127 #ifdef LISP_FEATURE_SB_THREAD
 128 # ifdef LISP_FEATURE_SB_SAFEPOINT
 129 #  ifdef LISP_FEATURE_SB_THRUPTION
 130     undoably_install_low_level_interrupt_handler(SIGPIPE, thruption_handler);
 131 #  endif
 132 # else
 133     undoably_install_low_level_interrupt_handler(SIG_STOP_FOR_GC,
 134                                                  sig_stop_for_gc_handler);
 135 # endif
 136 #endif
 137 }
 138
 139 char *
 140 os_get_runtime_executable_path(int external)
 141 {
 142     char path[] = "/proc/self/object/a.out";
 143
 144     if (external || access(path, R_OK) == -1)
 145         return NULL;
 146
 147     return copied_string(path);
 148 }
 149
 150 #ifdef LISP_FEATURE_SB_WTIMER
 151 /*
 152  * Waitable timer implementation for the safepoint-based (SIGALRM-free)
 153  * timer facility using SunOS completion ports.
 154  */
 155
 156 struct os_wtimer {
 157     int port;
 158     int timer;
 159 };
 160
 161 struct os_wtimer *
 162 os_create_wtimer()
 163 {
 164     int port = port_create();
 165     if (port == -1) {
 166         perror("port_create");
 167         lose("os_create_wtimer");
 168     }
 169
 170     port_notify_t pn;
 171     pn.portnfy_port = port;
 172     pn.portnfy_user = 0;
 173
 174     struct sigevent ev;
 175     memset(&ev, 0, sizeof(ev));
 176     ev.sigev_notify = SIGEV_PORT;
 177     ev.sigev_value.sival_ptr = &pn;
 178
 179     timer_t timer;
 180     if (timer_create(CLOCK_HIGHRES, &ev, &timer) == -1
 181         && (errno != EPERM || timer_create(CLOCK_REALTIME, &ev, &timer) == -1))
 182     {
 183         perror("timer_create");
 184         lose("os_create_wtimer");
 185     }
 186
 187     struct os_wtimer *wt = malloc(sizeof(struct os_wtimer));
 188     if (!wt)
 189         lose("os_create_wtimer: malloc");
 190
 191     wt->port = port;
 192     wt->timer = timer;
 193     return wt;
 194 }
 195
 196 int
 197 os_wait_for_wtimer(struct os_wtimer *wt)
 198 {
 199     port_event_t pe;
 200     if (port_get(wt->port, &pe, 0) == -1) {
 201         if (errno == EINTR)
 202             return 1;
 203         perror("port_get");
 204         lose("os_wtimer_listen failed");
 205     }
 206     return 0;
 207 }
 208
 209 void
 210 os_close_wtimer(struct os_wtimer *wt)
 211 {
 212     if (close(wt->port) == -1) {
 213         perror("close");
 214         lose("os_close_wtimer");
 215     }
 216     if (timer_delete(wt->timer) == -1) {
 217         perror("timer_delete");
 218         lose("os_close_wtimer");
 219     }
 220     free(wt);
 221 }
 222
 223 void
 224 os_set_wtimer(struct os_wtimer *wt, int sec, int nsec)
 225 {
 226     struct itimerspec spec;
 227     spec.it_value.tv_sec = sec;
 228     spec.it_value.tv_nsec = nsec;
 229     spec.it_interval.tv_sec = 0;
 230     spec.it_interval.tv_nsec = 0;
 231     if (timer_settime(wt->timer, 0, &spec, 0) == -1) {
 232         int x = errno;
 233         perror("timer_settime");
 234         if (x != EINVAL)
 235             lose("os_set_wtimer");
 236     }
 237 }
 238
 239 void
 240 os_cancel_wtimer(struct os_wtimer *wt)
 241 {
 242     os_set_wtimer(wt, 0, 0);
 243 }
 244 #endif