2 * OS-dependent routines for BSD-ish systems
4 * This file (along with os.h) exports an OS-independent interface to
5 * the operating system VM facilities. This interface looks a lot like
6 * the Mach interface (but simpler in some places). For some operating
7 * systems, a subset of these functions will have to be emulated.
11 * This software is part of the SBCL system. See the README file for
14 * This software is derived from the CMU CL system, which was
15 * written at Carnegie Mellon University and released into the
16 * public domain. The software is in the public domain and is
17 * provided with absolutely no warranty. See the COPYING and CREDITS
18 * files for more information.
22 #include <sys/param.h>
32 #include "interrupt.h"
37 #include "genesis/static-symbols.h"
38 #include "genesis/fdefn.h"
40 #include <sys/types.h>
42 /* #include <sys/sysinfo.h> */
44 #if defined LISP_FEATURE_GENCGC
45 #include "gencgc-internal.h"
48 os_vm_size_t os_vm_page_size;
51 #include <sys/resource.h>
52 #include <sys/sysctl.h>
54 #include <sys/stat.h> /* For the stat-family wrappers. */
55 #include <dirent.h> /* For the opendir()/readdir() wrappers */
56 #include <sys/socket.h> /* For the socket() wrapper */
57 static void netbsd_init();
58 #endif /* __NetBSD__ */
61 #include <sys/sysctl.h>
62 #if defined(LISP_FEATURE_SB_THREAD) && !defined(LISP_FEATURE_SB_PTHREAD_FUTEX)
66 static void freebsd_init();
67 #endif /* __FreeBSD__ */
70 #include <sys/types.h>
71 #include <sys/resource.h>
75 static void openbsd_init();
79 os_init(char *argv[], char *envp[])
81 os_vm_page_size = getpagesize();
85 #elif defined(__FreeBSD__)
87 #elif defined(__OpenBSD__)
93 os_context_sigmask_addr(os_context_t *context)
95 /* (Unlike most of the other context fields that we access, the
96 * signal mask field is a field of the basic, outermost context
97 * struct itself both in FreeBSD 4.0 and in OpenBSD 2.6.) */
98 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(LISP_FEATURE_DARWIN)
99 return &context->uc_sigmask;
100 #elif defined (__OpenBSD__)
101 return &context->sc_mask;
103 #error unsupported BSD variant
108 os_validate(os_vm_address_t addr, os_vm_size_t len)
110 int flags = MAP_PRIVATE | MAP_ANON;
115 addr = mmap(addr, len, OS_VM_PROT_ALL, flags, -1, 0);
117 if (addr == MAP_FAILED) {
126 os_invalidate(os_vm_address_t addr, os_vm_size_t len)
128 if (munmap(addr, len) == -1)
133 os_map(int fd, int offset, os_vm_address_t addr, os_vm_size_t len)
135 addr = mmap(addr, len,
137 MAP_PRIVATE | MAP_FILE | MAP_FIXED,
140 if (addr == MAP_FAILED) {
142 lose("unexpected mmap(..) failure\n");
149 os_protect(os_vm_address_t address, os_vm_size_t length, os_vm_prot_t prot)
151 if (mprotect(address, length, prot) == -1) {
157 in_range_p(os_vm_address_t a, lispobj sbeg, size_t slen)
159 char* beg = (char*) sbeg;
160 char* end = (char*) sbeg + slen;
161 char* adr = (char*) a;
162 return (adr >= beg && adr < end);
166 is_valid_lisp_addr(os_vm_address_t addr)
170 if (in_range_p(addr, READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE) ||
171 in_range_p(addr, STATIC_SPACE_START, STATIC_SPACE_SIZE) ||
172 in_range_p(addr, DYNAMIC_SPACE_START, dynamic_space_size))
174 for_each_thread(th) {
175 if (((os_vm_address_t)th->control_stack_start <= addr) &&
176 (addr < (os_vm_address_t)th->control_stack_end))
178 if (in_range_p(addr, (lispobj) th->binding_stack_start,
186 * any OS-dependent special low-level handling for signals
189 #if defined LISP_FEATURE_GENCGC
192 * The GENCGC needs to be hooked into whatever signal is raised for
193 * page fault on this OS.
197 memory_fault_handler(int signal, siginfo_t *siginfo, void *void_context
198 #if defined(LISP_FEATURE_FREEBSD) && defined(LISP_FEATURE_X86_64)
199 /* FreeBSD/amd64 stores fault address only in undocumented 4th arg. */
204 os_context_t *context = arch_os_get_context(&void_context);
205 #if defined(LISP_FEATURE_FREEBSD) && defined(LISP_FEATURE_X86_64)
206 /* KLUDGE: Store fault address into si_addr for compatibilities. */
207 siginfo->si_addr = fault_addr;
209 void *fault_addr = arch_get_bad_addr(signal, siginfo, context);
212 #if defined(LISP_FEATURE_RESTORE_TLS_SEGMENT_REGISTER_FROM_CONTEXT)
213 FSHOW_SIGNAL((stderr, "/ TLS: restoring fs: %p in memory_fault_handler\n",
214 *CONTEXT_ADDR_FROM_STEM(fs)));
215 os_restore_tls_segment_register(context);
218 FSHOW((stderr, "Memory fault at: %p, PC: %p\n", fault_addr, *os_context_pc_addr(context)));
220 if (!gencgc_handle_wp_violation(fault_addr))
221 if(!handle_guard_page_triggered(context,fault_addr)) {
222 #ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
223 lisp_memory_fault_error(context, fault_addr);
225 /* FIXME: never returns 0 */
226 if (!maybe_gc(context)) {
227 interrupt_handle_now(signal, siginfo, context);
233 #if defined(LISP_FEATURE_MACH_EXCEPTION_HANDLER)
235 mach_error_memory_fault_handler(int signal, siginfo_t *siginfo, void *void_context) {
236 lose("Unhandled memory fault. Exiting.");
241 os_install_interrupt_handlers(void)
243 SHOW("os_install_interrupt_handlers()/bsd-os/defined(GENCGC)");
244 #if defined(LISP_FEATURE_MACH_EXCEPTION_HANDLER)
245 undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT,
246 mach_error_memory_fault_handler);
248 undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT,
249 #ifdef LISP_FEATURE_FREEBSD
250 (__siginfohandler_t *)
252 memory_fault_handler);
255 #ifdef LISP_FEATURE_SB_THREAD
256 undoably_install_low_level_interrupt_handler(SIG_INTERRUPT_THREAD,
257 interrupt_thread_handler);
258 undoably_install_low_level_interrupt_handler(SIG_STOP_FOR_GC,
259 sig_stop_for_gc_handler);
261 SHOW("leaving os_install_interrupt_handlers()");
264 #else /* Currently PPC/Darwin/Cheney only */
267 sigsegv_handler(int signal, siginfo_t *info, void* void_context)
269 os_context_t *context = arch_os_get_context(&void_context);
271 unsigned int pc = (unsigned int *)(*os_context_pc_addr(context));
273 os_vm_address_t addr;
275 addr = arch_get_bad_addr(signal, info, context);
276 if (!cheneygc_handle_wp_violation(context, addr))
277 if (!handle_guard_page_triggered(context, addr))
278 interrupt_handle_now(signal, info, context);
282 os_install_interrupt_handlers(void)
284 SHOW("os_install_interrupt_handlers()/bsd-os/!defined(GENCGC)");
285 undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT,
289 #endif /* defined GENCGC */
292 static void netbsd_init()
298 /* Are we running on a sufficiently functional kernel? */
303 sysctl(mib, 2, &osrev, &len, NULL, 0);
305 /* If we're older than 2.0... */
306 if (osrev < 200000000) {
307 fprintf(stderr, "osrev = %d (needed at least 200000000).\n", osrev);
308 lose("NetBSD kernel too old to run sbcl.\n");
311 /* NetBSD counts mmap()ed space against the process's data size limit,
312 * so yank it up. This might be a nasty thing to do? */
313 getrlimit (RLIMIT_DATA, &rl);
314 /* Amazingly for such a new port, the provenance and meaning of
315 this number are unknown. It might just mean REALLY_BIG_LIMIT,
316 or possibly it should be calculated from dynamic space size.
317 -- CSR, 2004-04-08 */
318 rl.rlim_cur = 1073741824;
319 if (setrlimit (RLIMIT_DATA, &rl) < 0) {
321 "RUNTIME WARNING: unable to raise process data size limit:\n\
323 The system may fail to start.\n",
328 /* Various routines in NetBSD's C library are compatibility wrappers
329 for old versions. Programs must be processed by the C toolchain in
330 order to get up-to-date definitions of such routines. */
331 /* The stat-family, opendir, and readdir are used only in sb-posix, as
332 of 2007-01-16. -- RMK */
334 _stat(const char *path, struct stat *sb)
336 return stat(path, sb);
339 _lstat(const char *path, struct stat *sb)
341 return lstat(path, sb);
344 _fstat(int fd, struct stat *sb)
346 return fstat(fd, sb);
350 _opendir(const char *filename)
352 return opendir(filename);
357 return readdir(dirp);
360 /* Used in sb-bsd-sockets. */
362 _socket(int domain, int type, int protocol)
364 return socket(domain, type, protocol);
366 #endif /* __NetBSD__ */
369 extern int getosreldate(void);
371 int sig_memory_fault;
373 static void freebsd_init()
375 /* Memory fault signal on FreeBSD was changed from SIGBUS to
377 if (getosreldate() < 700004)
378 sig_memory_fault = SIGBUS;
380 sig_memory_fault = SIGSEGV;
382 /* Quote from sbcl-devel (NIIMI Satoshi): "Some OSes, like FreeBSD
383 * 4.x with GENERIC kernel, does not enable SSE support even on
384 * SSE capable CPUs". Detect this situation and skip the
385 * fast_bzero sse/base selection logic that's normally done in
388 #ifdef LISP_FEATURE_X86
393 len = sizeof(instruction_sse);
394 if (sysctlbyname("hw.instruction_sse", &instruction_sse, &len,
395 NULL, 0) == 0 && instruction_sse != 0) {
396 /* Use the SSE detector */
397 fast_bzero_pointer = fast_bzero_detect;
400 #endif /* LISP_FEATURE_X86 */
403 #if defined(LISP_FEATURE_SB_THREAD) && !defined(LISP_FEATURE_SB_PTHREAD_FUTEX)
405 futex_wait(int *lock_word, long oldval, long sec, unsigned long usec)
407 struct timespec timeout;
412 ret = umtx_wait((void *)lock_word, oldval, NULL);
414 timeout.tv_sec = sec;
415 timeout.tv_nsec = usec * 1000;
416 ret = umtx_wait((void *)lock_word, oldval, &timeout);
425 /* spurious wakeup from interrupt */
428 /* EWOULDBLOCK and others, need to check the lock */
434 futex_wake(int *lock_word, int n)
436 return umtx_wake((void *)lock_word, n);
439 #endif /* __FreeBSD__ */
441 #ifdef LISP_FEATURE_DARWIN
442 /* defined in ppc-darwin-os.c instead */
443 #elif defined(LISP_FEATURE_FREEBSD)
444 #ifndef KERN_PROC_PATHNAME
445 #define KERN_PROC_PATHNAME 12
449 os_get_runtime_executable_path()
451 char path[PATH_MAX + 1];
453 if (getosreldate() >= 600024) {
454 /* KERN_PROC_PATHNAME is available */
455 size_t len = PATH_MAX + 1;
460 mib[2] = KERN_PROC_PATHNAME;
462 if (sysctl(mib, 4, &path, &len, NULL, 0) != 0)
466 size = readlink("/proc/curproc/file", path, sizeof(path) - 1);
471 if (strcmp(path, "unknown") == 0)
473 return copied_string(path);
475 #elif defined(LISP_FEATURE_NETBSD) || defined(LISP_FEATURE_OPENBSD)
477 os_get_runtime_executable_path()
480 char *path = strdup("/proc/curproc/file");
481 if (path && ((stat(path, &sb)) == 0))
484 fprintf(stderr, "Couldn't stat /proc/curproc/file; is /proc mounted?\n");
488 #else /* Not DARWIN or FREEBSD or NETBSD or OPENBSD */
490 os_get_runtime_executable_path()
502 /* OpenBSD, like NetBSD, counts mmap()ed space against the
503 * process's data size limit. If the soft limit is lower than the
504 * hard limit then try to yank it up, this lets users in the
505 * "staff" login class run sbcl with a default /etc/login.conf
507 getrlimit (RLIMIT_DATA, &rl);
508 if (rl.rlim_cur < rl.rlim_max) {
509 rl.rlim_cur = rl.rlim_max;
510 if (setrlimit (RLIMIT_DATA, &rl) < 0) {
512 "RUNTIME WARNING: unable to raise process data size limit:\n\
514 The system may fail to start.\n",
519 /* Display a (hopefully) helpful warning if it looks like we won't
520 * be able to allocate enough memory. In testing I found that on
521 * my system at least, a minimum of 25M on top of the three space
522 * sizes was needed to start SBCL. Show a warning below 32M so as
523 * to leave a little breathing room.
525 getrlimit (RLIMIT_DATA, &rl);
526 if (dynamic_space_size + READ_ONLY_SPACE_SIZE + STATIC_SPACE_SIZE +
527 LINKAGE_TABLE_SPACE_SIZE + (32*1024*1024) > rl.rlim_cur)
529 "RUNTIME WARNING: data size resource limit may be too low,\n"
530 " try decreasing the dynamic space size with --dynamic-space-size\n");
533 /* OpenBSD's dlsym() relies on the gcc bulitin
534 * __builtin_return_address(0) returning an address in the
535 * executable's text segment, but when called from lisp it will return
536 * an address in the dynamic space. Work around this by calling this
537 * wrapper function instead. Note that tail-call optimization will
538 * defeat this, disable it by saving the dlsym() return value in a
542 os_dlsym(void *handle, const char *symbol)
544 void * volatile ret = dlsym(handle, symbol);