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