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(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
  80 os_vm_address_t
  81 os_map(int fd, int offset, os_vm_address_t addr, os_vm_size_t len)
  82 {
  83
  84     addr = mmap(addr, len,
  85                 OS_VM_PROT_ALL,
  86                 MAP_PRIVATE | MAP_FIXED,
  87                 fd, (off_t) offset);
  88
  89     if (addr == MAP_FAILED) {
  90         perror("mmap");
  91         lose("Unexpedted mmap(..) failure\n");
  92     }
  93
  94     return addr;
  95 }
  96
  97 void
  98 os_protect(os_vm_address_t address, os_vm_size_t length, os_vm_prot_t prot)
  99 {
 100     if(mprotect((void*)address, length, prot) == -1) {
 101         perror("mprotect");
 102     }
 103 }
 104
 105 static boolean in_range_p(os_vm_address_t a, lispobj sbeg, size_t slen)
 106 {
 107     char* beg = (char*) sbeg;
 108     char* end = (char*) sbeg + slen;
 109     char* adr = (char*) a;
 110     return (adr >= beg && adr < end);
 111 }
 112
 113 boolean is_valid_lisp_addr(os_vm_address_t addr)
 114 {
 115     /* Old CMUCL comment:
 116
 117        Just assume address is valid if it lies within one of the known
 118        spaces.  (Unlike sunos-os which keeps track of every valid page.) */
 119
 120     /* FIXME: this looks like a valid definition for all targets with
 121        cheney-gc; it may not be impressively smart (witness the
 122        comment above) but maybe associating these functions with the
 123        GC rather than the OS would be a maintainability win.  -- CSR,
 124        2003-04-04 */
 125     struct thread *th;
 126     if(in_range_p(addr, READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE) ||
 127        in_range_p(addr, STATIC_SPACE_START   , STATIC_SPACE_SIZE) ||
 128 #ifdef LISP_FEATURE_GENCGC
 129        in_range_p(addr, DYNAMIC_SPACE_START  , dynamic_space_size)
 130 #else
 131        in_range_p(addr, DYNAMIC_0_SPACE_START, dynamic_space_size) ||
 132        in_range_p(addr, DYNAMIC_1_SPACE_START, dynamic_space_size)
 133 #endif
 134        )
 135         return 1;
 136     for_each_thread(th) {
 137         if((th->control_stack_start <= addr) && (addr < th->control_stack_end))
 138             return 1;
 139         if(in_range_p(addr, th->binding_stack_start, BINDING_STACK_SIZE))
 140             return 1;
 141     }
 142     return 0;
 143 }
 144 \f
 145
 146 #if defined LISP_FEATURE_GENCGC
 147
 148 void
 149 sigsegv_handler(int signal, siginfo_t *info, os_context_t *context)
 150 {
 151     void* fault_addr = (void*)info->si_addr;
 152
 153 #ifdef LISP_FEATURE_SB_SAFEPOINT
 154     if (handle_safepoint_violation(context, fault_addr))
 155             return;
 156 #endif
 157
 158     if (!gencgc_handle_wp_violation(fault_addr))
 159         if(!handle_guard_page_triggered(context, fault_addr))
 160             lisp_memory_fault_error(context, fault_addr);
 161 }
 162
 163 #else
 164
 165 static void
 166 sigsegv_handler(int signal, siginfo_t *info, os_context_t *context)
 167 {
 168     os_vm_address_t addr = arch_get_bad_addr(signal, info, context);
 169
 170     if (!cheneygc_handle_wp_violation(context, addr)) {
 171         if (!handle_guard_page_triggered(context,addr))
 172             lisp_memory_fault_error(context, addr);
 173     }
 174 }
 175
 176 #endif
 177
 178 void
 179 os_install_interrupt_handlers()
 180 {
 181     undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT,
 182                                                  sigsegv_handler);
 183
 184     /* OAOOM c.f. linux-os.c.
 185      * Should we have a reusable function gc_install_interrupt_handlers? */
 186 #ifdef LISP_FEATURE_SB_THREAD
 187 # ifdef LISP_FEATURE_SB_SAFEPOINT
 188 #  ifdef LISP_FEATURE_SB_THRUPTION
 189     undoably_install_low_level_interrupt_handler(SIGPIPE, thruption_handler);
 190 #  endif
 191 # else
 192     undoably_install_low_level_interrupt_handler(SIG_STOP_FOR_GC,
 193                                                  sig_stop_for_gc_handler);
 194 # endif
 195 #endif
 196 }
 197
 198 char *
 199 os_get_runtime_executable_path(int external)
 200 {
 201     char path[] = "/proc/self/object/a.out";
 202
 203     if (external || access(path, R_OK) == -1)
 204         return NULL;
 205
 206     return copied_string(path);
 207 }
 208
 209 #ifdef LISP_FEATURE_SB_WTIMER
 210 /*
 211  * Waitable timer implementation for the safepoint-based (SIGALRM-free)
 212  * timer facility using SunOS completion ports.
 213  */
 214
 215 struct os_wtimer {
 216     int port;
 217     int timer;
 218 };
 219
 220 struct os_wtimer *
 221 os_create_wtimer()
 222 {
 223     int port = port_create();
 224     if (port == -1) {
 225         perror("port_create");
 226         lose("os_create_wtimer");
 227     }
 228
 229     port_notify_t pn;
 230     pn.portnfy_port = port;
 231     pn.portnfy_user = 0;
 232
 233     struct sigevent ev;
 234     memset(&ev, 0, sizeof(ev));
 235     ev.sigev_notify = SIGEV_PORT;
 236     ev.sigev_value.sival_ptr = &pn;
 237
 238     timer_t timer;
 239     if (timer_create(CLOCK_HIGHRES, &ev, &timer) == -1
 240         && (errno != EPERM || timer_create(CLOCK_REALTIME, &ev, &timer) == -1))
 241     {
 242         perror("timer_create");
 243         lose("os_create_wtimer");
 244     }
 245
 246     struct os_wtimer *wt = malloc(sizeof(struct os_wtimer));
 247     if (!wt)
 248         lose("os_create_wtimer: malloc");
 249
 250     wt->port = port;
 251     wt->timer = timer;
 252     return wt;
 253 }
 254
 255 int
 256 os_wait_for_wtimer(struct os_wtimer *wt)
 257 {
 258     port_event_t pe;
 259     if (port_get(wt->port, &pe, 0) == -1) {
 260         if (errno == EINTR)
 261             return 1;
 262         perror("port_get");
 263         lose("os_wtimer_listen failed");
 264     }
 265     return 0;
 266 }
 267
 268 void
 269 os_close_wtimer(struct os_wtimer *wt)
 270 {
 271     if (close(wt->port) == -1) {
 272         perror("close");
 273         lose("os_close_wtimer");
 274     }
 275     if (timer_delete(wt->timer) == -1) {
 276         perror("timer_delete");
 277         lose("os_close_wtimer");
 278     }
 279     free(wt);
 280 }
 281
 282 void
 283 os_set_wtimer(struct os_wtimer *wt, int sec, int nsec)
 284 {
 285     struct itimerspec spec;
 286     spec.it_value.tv_sec = sec;
 287     spec.it_value.tv_nsec = nsec;
 288     spec.it_interval.tv_sec = 0;
 289     spec.it_interval.tv_nsec = 0;
 290     if (timer_settime(wt->timer, 0, &spec, 0) == -1) {
 291         int x = errno;
 292         perror("timer_settime");
 293         if (x != EINVAL)
 294             lose("os_set_wtimer");
 295     }
 296 }
 297
 298 void
 299 os_cancel_wtimer(struct os_wtimer *wt)
 300 {
 301     os_set_wtimer(wt, 0, 0);
 302 }
 303 #endif