9 #include <sys/utsname.h>
15 #include "interrupt.h"
18 #include "target-arch-os.h"
20 #ifdef LISP_FEATURE_X86
21 #include "genesis/static-symbols.h"
22 #include "genesis/fdefn.h"
25 #ifdef LISP_FEATURE_GENCGC
26 #include "gencgc-internal.h"
29 #ifdef LISP_FEATURE_SB_WTIMER
35 os_vm_size_t os_vm_page_size=0;
38 os_init(char *argv[], char *envp[])
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).
47 os_vm_page_size = BACKEND_PAGE_BYTES;
50 os_vm_address_t os_validate(os_vm_address_t addr, os_vm_size_t len)
52 int flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANON;
56 addr = mmap(addr, len, OS_VM_PROT_ALL, flags, -1, 0);
58 if (addr == MAP_FAILED) {
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
72 void os_invalidate(os_vm_address_t addr, os_vm_size_t len)
74 if(munmap((void*) addr, len) == -1)
81 os_map(int fd, int offset, os_vm_address_t addr, os_vm_size_t len)
84 addr = mmap(addr, len,
86 MAP_PRIVATE | MAP_FIXED,
89 if (addr == MAP_FAILED) {
91 lose("Unexpedted mmap(..) failure\n");
98 os_protect(os_vm_address_t address, os_vm_size_t length, os_vm_prot_t prot)
100 if(mprotect((void*)address, length, prot) == -1) {
105 static boolean in_range_p(os_vm_address_t a, lispobj sbeg, size_t slen)
107 char* beg = (char*) sbeg;
108 char* end = (char*) sbeg + slen;
109 char* adr = (char*) a;
110 return (adr >= beg && adr < end);
113 boolean is_valid_lisp_addr(os_vm_address_t addr)
115 /* Old CMUCL comment:
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.) */
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,
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)
131 in_range_p(addr, DYNAMIC_0_SPACE_START, dynamic_space_size) ||
132 in_range_p(addr, DYNAMIC_1_SPACE_START, dynamic_space_size)
136 for_each_thread(th) {
137 if((th->control_stack_start <= addr) && (addr < th->control_stack_end))
139 if(in_range_p(addr, th->binding_stack_start, BINDING_STACK_SIZE))
146 #if defined LISP_FEATURE_GENCGC
149 sigsegv_handler(int signal, siginfo_t *info, os_context_t *context)
151 void* fault_addr = (void*)info->si_addr;
153 #ifdef LISP_FEATURE_SB_SAFEPOINT
154 if (handle_safepoint_violation(context, fault_addr))
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);
166 sigsegv_handler(int signal, siginfo_t *info, os_context_t *context)
168 os_vm_address_t addr = arch_get_bad_addr(signal, info, context);
170 if (!cheneygc_handle_wp_violation(context, addr)) {
171 if (!handle_guard_page_triggered(context,addr))
172 lisp_memory_fault_error(context, addr);
179 os_install_interrupt_handlers()
181 undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT,
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);
192 undoably_install_low_level_interrupt_handler(SIG_STOP_FOR_GC,
193 sig_stop_for_gc_handler);
199 os_get_runtime_executable_path(int external)
201 char path[] = "/proc/self/object/a.out";
203 if (external || access(path, R_OK) == -1)
206 return copied_string(path);
209 #ifdef LISP_FEATURE_SB_WTIMER
211 * Waitable timer implementation for the safepoint-based (SIGALRM-free)
212 * timer facility using SunOS completion ports.
223 int port = port_create();
225 perror("port_create");
226 lose("os_create_wtimer");
230 pn.portnfy_port = port;
234 memset(&ev, 0, sizeof(ev));
235 ev.sigev_notify = SIGEV_PORT;
236 ev.sigev_value.sival_ptr = &pn;
239 if (timer_create(CLOCK_HIGHRES, &ev, &timer) == -1
240 && (errno != EPERM || timer_create(CLOCK_REALTIME, &ev, &timer) == -1))
242 perror("timer_create");
243 lose("os_create_wtimer");
246 struct os_wtimer *wt = malloc(sizeof(struct os_wtimer));
248 lose("os_create_wtimer: malloc");
256 os_wait_for_wtimer(struct os_wtimer *wt)
259 if (port_get(wt->port, &pe, 0) == -1) {
263 lose("os_wtimer_listen failed");
269 os_close_wtimer(struct os_wtimer *wt)
271 if (close(wt->port) == -1) {
273 lose("os_close_wtimer");
275 if (timer_delete(wt->timer) == -1) {
276 perror("timer_delete");
277 lose("os_close_wtimer");
283 os_set_wtimer(struct os_wtimer *wt, int sec, int nsec)
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) {
292 perror("timer_settime");
294 lose("os_set_wtimer");
299 os_cancel_wtimer(struct os_wtimer *wt)
301 os_set_wtimer(wt, 0, 0);