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>
73 #include <sys/sysctl.h>
75 #ifdef LISP_FEATURE_X86
76 #include <machine/cpu.h>
79 static void openbsd_init();
83 os_init(char *argv[], char *envp[])
85 os_vm_page_size = BACKEND_PAGE_BYTES;
89 #elif defined(__FreeBSD__)
91 #elif defined(__OpenBSD__)
97 os_context_sigmask_addr(os_context_t *context)
99 /* (Unlike most of the other context fields that we access, the
100 * signal mask field is a field of the basic, outermost context
101 * struct itself both in FreeBSD 4.0 and in OpenBSD 2.6.) */
102 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(LISP_FEATURE_DARWIN)
103 return &context->uc_sigmask;
104 #elif defined (__OpenBSD__)
105 return &context->sc_mask;
107 #error unsupported BSD variant
112 os_validate(os_vm_address_t addr, os_vm_size_t len)
114 int flags = MAP_PRIVATE | MAP_ANON;
119 addr = mmap(addr, len, OS_VM_PROT_ALL, flags, -1, 0);
121 if (addr == MAP_FAILED) {
130 os_invalidate(os_vm_address_t addr, os_vm_size_t len)
132 if (munmap(addr, len) == -1)
137 os_map(int fd, int offset, os_vm_address_t addr, os_vm_size_t len)
139 addr = mmap(addr, len,
141 MAP_PRIVATE | MAP_FILE | MAP_FIXED,
144 if (addr == MAP_FAILED) {
146 lose("unexpected mmap(..) failure\n");
153 os_protect(os_vm_address_t address, os_vm_size_t length, os_vm_prot_t prot)
155 if (mprotect(address, length, prot) == -1) {
161 in_range_p(os_vm_address_t a, lispobj sbeg, size_t slen)
163 char* beg = (char*) sbeg;
164 char* end = (char*) sbeg + slen;
165 char* adr = (char*) a;
166 return (adr >= beg && adr < end);
170 is_valid_lisp_addr(os_vm_address_t addr)
174 if (in_range_p(addr, READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE) ||
175 in_range_p(addr, STATIC_SPACE_START, STATIC_SPACE_SIZE) ||
176 in_range_p(addr, DYNAMIC_SPACE_START, dynamic_space_size))
178 for_each_thread(th) {
179 if (((os_vm_address_t)th->control_stack_start <= addr) &&
180 (addr < (os_vm_address_t)th->control_stack_end))
182 if (in_range_p(addr, (lispobj) th->binding_stack_start,
190 * any OS-dependent special low-level handling for signals
193 #if defined LISP_FEATURE_GENCGC
196 * The GENCGC needs to be hooked into whatever signal is raised for
197 * page fault on this OS.
201 memory_fault_handler(int signal, siginfo_t *siginfo, os_context_t *context)
203 void *fault_addr = arch_get_bad_addr(signal, siginfo, context);
205 #if defined(LISP_FEATURE_RESTORE_TLS_SEGMENT_REGISTER_FROM_CONTEXT)
206 FSHOW_SIGNAL((stderr, "/ TLS: restoring fs: %p in memory_fault_handler\n",
207 *CONTEXT_ADDR_FROM_STEM(fs)));
208 os_restore_tls_segment_register(context);
211 FSHOW((stderr, "Memory fault at: %p, PC: %p\n", fault_addr, *os_context_pc_addr(context)));
213 if (!gencgc_handle_wp_violation(fault_addr))
214 if(!handle_guard_page_triggered(context,fault_addr))
215 lisp_memory_fault_error(context, fault_addr);
218 #if defined(LISP_FEATURE_MACH_EXCEPTION_HANDLER)
220 mach_error_memory_fault_handler(int signal, siginfo_t *siginfo,
221 os_context_t *context) {
222 lose("Unhandled memory fault. Exiting.");
227 os_install_interrupt_handlers(void)
229 SHOW("os_install_interrupt_handlers()/bsd-os/defined(GENCGC)");
230 #if defined(LISP_FEATURE_MACH_EXCEPTION_HANDLER)
231 undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT,
232 mach_error_memory_fault_handler);
234 undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT,
235 #ifdef LISP_FEATURE_FREEBSD
236 (__siginfohandler_t *)
238 memory_fault_handler);
241 #ifdef LISP_FEATURE_SB_THREAD
242 undoably_install_low_level_interrupt_handler(SIG_STOP_FOR_GC,
243 sig_stop_for_gc_handler);
245 SHOW("leaving os_install_interrupt_handlers()");
248 #else /* Currently PPC/Darwin/Cheney only */
251 sigsegv_handler(int signal, siginfo_t *info, os_context_t *context)
254 unsigned int pc = (unsigned int *)(*os_context_pc_addr(context));
256 os_vm_address_t addr;
258 addr = arch_get_bad_addr(signal, info, context);
259 if (!cheneygc_handle_wp_violation(context, addr))
260 if (!handle_guard_page_triggered(context, addr))
261 interrupt_handle_now(signal, info, context);
265 os_install_interrupt_handlers(void)
267 SHOW("os_install_interrupt_handlers()/bsd-os/!defined(GENCGC)");
268 undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT,
272 #endif /* defined GENCGC */
275 static void netbsd_init()
281 /* Are we running on a sufficiently functional kernel? */
286 sysctl(mib, 2, &osrev, &len, NULL, 0);
288 /* If we're older than 2.0... */
289 if (osrev < 200000000) {
290 fprintf(stderr, "osrev = %d (needed at least 200000000).\n", osrev);
291 lose("NetBSD kernel too old to run sbcl.\n");
294 /* NetBSD counts mmap()ed space against the process's data size limit,
295 * so yank it up. This might be a nasty thing to do? */
296 getrlimit (RLIMIT_DATA, &rl);
297 /* Amazingly for such a new port, the provenance and meaning of
298 this number are unknown. It might just mean REALLY_BIG_LIMIT,
299 or possibly it should be calculated from dynamic space size.
300 -- CSR, 2004-04-08 */
301 rl.rlim_cur = 1073741824;
302 if (setrlimit (RLIMIT_DATA, &rl) < 0) {
304 "RUNTIME WARNING: unable to raise process data size limit:\n\
306 The system may fail to start.\n",
311 /* Various routines in NetBSD's C library are compatibility wrappers
312 for old versions. Programs must be processed by the C toolchain in
313 order to get up-to-date definitions of such routines. */
314 /* The stat-family, opendir, and readdir are used only in sb-posix, as
315 of 2007-01-16. -- RMK */
317 _stat(const char *path, struct stat *sb)
319 return stat(path, sb);
322 _lstat(const char *path, struct stat *sb)
324 return lstat(path, sb);
327 _fstat(int fd, struct stat *sb)
329 return fstat(fd, sb);
333 _opendir(const char *filename)
335 return opendir(filename);
340 return readdir(dirp);
343 /* Used in sb-bsd-sockets. */
345 _socket(int domain, int type, int protocol)
347 return socket(domain, type, protocol);
349 #endif /* __NetBSD__ */
352 extern int getosreldate(void);
354 int sig_memory_fault;
356 static void freebsd_init()
358 /* Memory fault signal on FreeBSD was changed from SIGBUS to
360 if (getosreldate() < 700004)
361 sig_memory_fault = SIGBUS;
363 sig_memory_fault = SIGSEGV;
365 /* Quote from sbcl-devel (NIIMI Satoshi): "Some OSes, like FreeBSD
366 * 4.x with GENERIC kernel, does not enable SSE support even on
367 * SSE capable CPUs". Detect this situation and skip the
368 * fast_bzero sse/base selection logic that's normally done in
371 #ifdef LISP_FEATURE_X86
376 len = sizeof(instruction_sse);
377 if (sysctlbyname("hw.instruction_sse", &instruction_sse, &len,
378 NULL, 0) == 0 && instruction_sse != 0) {
379 /* Use the SSE detector */
380 fast_bzero_pointer = fast_bzero_detect;
383 #endif /* LISP_FEATURE_X86 */
386 #if defined(LISP_FEATURE_SB_THREAD) && defined(LISP_FEATURE_SB_FUTEX) \
387 && !defined(LISP_FEATURE_SB_PTHREAD_FUTEX)
389 futex_wait(int *lock_word, long oldval, long sec, unsigned long usec)
391 struct timespec timeout;
395 ret = umtx_wait((void *)lock_word, oldval, NULL);
397 timeout.tv_sec = sec;
398 timeout.tv_nsec = usec * 1000;
399 ret = umtx_wait((void *)lock_word, oldval, &timeout);
410 /* EWOULDBLOCK and others, need to check the lock */
416 futex_wake(int *lock_word, int n)
418 return umtx_wake((void *)lock_word, n);
421 #endif /* __FreeBSD__ */
423 #ifdef LISP_FEATURE_DARWIN
424 /* defined in ppc-darwin-os.c instead */
425 #elif defined(LISP_FEATURE_FREEBSD)
426 #ifndef KERN_PROC_PATHNAME
427 #define KERN_PROC_PATHNAME 12
431 os_get_runtime_executable_path(int external)
433 char path[PATH_MAX + 1];
435 if (getosreldate() >= 600024) {
436 /* KERN_PROC_PATHNAME is available */
437 size_t len = PATH_MAX + 1;
442 mib[2] = KERN_PROC_PATHNAME;
444 if (sysctl(mib, 4, &path, &len, NULL, 0) != 0)
448 size = readlink("/proc/curproc/file", path, sizeof(path) - 1);
453 if (strcmp(path, "unknown") == 0)
455 return copied_string(path);
457 #elif defined(LISP_FEATURE_NETBSD) || defined(LISP_FEATURE_OPENBSD)
459 os_get_runtime_executable_path(int external)
462 if (!external && stat("/proc/curproc/file", &sb) == 0)
463 return copied_string("/proc/curproc/file");
466 #else /* Not DARWIN or FREEBSD or NETBSD or OPENBSD */
468 os_get_runtime_executable_path(int external)
476 int openbsd_use_fxsave = 0;
481 #ifdef LISP_FEATURE_X86
486 * Show a warning if it looks like the memory available after
487 * allocating the spaces won't be at least this much.
489 #ifdef LISP_FEATURE_X86_64
490 const int wantfree = 64 * 1024 * 1024;
492 const int wantfree = 32 * 1024 * 1024;
496 #ifdef LISP_FEATURE_X86
497 /* Save the machdep.osfxsr sysctl for use by os_restore_fp_control() */
498 mib[0] = CTL_MACHDEP;
500 size = sizeof (openbsd_use_fxsave);
501 sysctl(mib, 2, &openbsd_use_fxsave, &size, NULL, 0);
504 /* OpenBSD, like NetBSD, counts mmap()ed space against the
505 * process's data size limit. If the soft limit is lower than the
506 * hard limit then try to yank it up, this lets users in the
507 * "staff" or "daemon" login classes run sbcl with larger dynamic
510 getrlimit (RLIMIT_DATA, &rl);
511 if (rl.rlim_cur < rl.rlim_max) {
512 rl.rlim_cur = rl.rlim_max;
513 if (setrlimit (RLIMIT_DATA, &rl) < 0) {
515 "RUNTIME WARNING: unable to raise process data size limit:\n\
517 The system may fail to start.\n",
523 * Display a (hopefully) helpful warning if it looks like we won't
524 * be able to allocate enough memory.
526 getrlimit (RLIMIT_DATA, &rl);
527 if (dynamic_space_size + READ_ONLY_SPACE_SIZE + STATIC_SPACE_SIZE +
528 LINKAGE_TABLE_SPACE_SIZE + wantfree > rl.rlim_cur)
530 "RUNTIME WARNING: data size resource limit may be too low,\n"
531 " try decreasing the dynamic space size with --dynamic-space-size\n"
532 " or raising the datasize or datasize-max limits in /etc/login.conf\n");
535 /* OpenBSD's dlsym() relies on the gcc bulitin
536 * __builtin_return_address(0) returning an address in the
537 * executable's text segment, but when called from lisp it will return
538 * an address in the dynamic space. Work around this by calling this
539 * wrapper function instead. Note that tail-call optimization will
540 * defeat this, disable it by saving the dlsym() return value in a
544 os_dlsym(void *handle, const char *symbol)
546 void * volatile ret = dlsym(handle, symbol);