#include <unistd.h>
#include <errno.h>
#include <sys/param.h>
+#include <sys/utsname.h>
+#include "sbcl.h"
#include "os.h"
#include "arch.h"
#include "interr.h"
#include "interrupt.h"
#include "globals.h"
#include "validate.h"
-#include "sbcl.h"
#include "target-arch-os.h"
-#define OS_VM_DEFAULT_PAGESIZE 8192
+#ifdef LISP_FEATURE_X86
+#include "genesis/static-symbols.h"
+#include "genesis/fdefn.h"
+#endif
-long os_vm_page_size=(-1);
-static long os_real_page_size=(-1);
+#ifdef LISP_FEATURE_GENCGC
+#include "gencgc-internal.h"
+#endif
-static os_vm_size_t real_page_size_difference=0;
+#ifdef LISP_FEATURE_SB_WTIMER
+# include <port.h>
+# include <time.h>
+# include <errno.h>
+#endif
+
+os_vm_size_t os_vm_page_size=0;
void
-os_init(void)
-{
- /* I do not understand this at all. FIXME. */
- os_vm_page_size = os_real_page_size = sysconf(_SC_PAGESIZE);
-
- if(os_vm_page_size>OS_VM_DEFAULT_PAGESIZE){
- fprintf(stderr,"os_init: Pagesize too large (%d > %d)\n",
- os_vm_page_size,OS_VM_DEFAULT_PAGESIZE);
- exit(1);
- }else{
- /*
- * we do this because there are apparently dependencies on
- * the pagesize being OS_VM_DEFAULT_PAGESIZE somewhere...
- * but since the OS doesn't know we're using this restriction,
- * we have to grovel around a bit to enforce it, thus anything
- * that uses real_page_size_difference.
- */
- /* FIXME: Is this still true? */
- real_page_size_difference=OS_VM_DEFAULT_PAGESIZE-os_vm_page_size;
- os_vm_page_size=OS_VM_DEFAULT_PAGESIZE;
- }
+os_init(char *argv[], char *envp[])
+{
+ /*
+ * historically, this used sysconf to select the runtime page size
+ * per recent changes on other arches and discussion on sbcl-devel,
+ * however, this is not necessary -- the VM page size need not match
+ * the OS page size (and the default backend page size has been
+ * ramped up accordingly for efficiency reasons).
+ */
+ os_vm_page_size = BACKEND_PAGE_BYTES;
}
-os_vm_address_t
-os_validate(os_vm_address_t addr, os_vm_size_t len)
+os_vm_address_t os_validate(os_vm_address_t addr, os_vm_size_t len)
{
int flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANON;
-
- if (addr)
- flags |= MAP_FIXED;
-
- addr = mmap(addr, len,
- OS_VM_PROT_ALL,
- flags,
- -1, 0);
+ if (addr)
+ flags |= MAP_FIXED;
+
+ addr = mmap(addr, len, OS_VM_PROT_ALL, flags, -1, 0);
+
if (addr == MAP_FAILED) {
- perror("mmap");
- lose ("Error in mmap(..)");
+ perror("mmap");
+ /* While it is generally hard to recover from out-of-memory
+ * situations, we require callers to decide on the right course
+ * of action here. Consider thread creation: Failure to mmap
+ * here is common if users have started too many threads, and
+ * often we can recover from that and treat it as an ordinary
+ * error. */
+ return 0;
}
-
+
return addr;
}
-void
-os_invalidate(os_vm_address_t addr, os_vm_size_t len)
+void os_invalidate(os_vm_address_t addr, os_vm_size_t len)
{
if(munmap((void*) addr, len) == -1)
- perror("munmap");
+ perror("munmap");
}
\f
{
addr = mmap(addr, len,
- OS_VM_PROT_ALL,
- MAP_PRIVATE | MAP_FIXED,
- fd, (off_t) offset);
+ OS_VM_PROT_ALL,
+ MAP_PRIVATE | MAP_FIXED,
+ fd, (off_t) offset);
if (addr == MAP_FAILED) {
- perror("mmap");
- lose("Unexpedted mmap(..) failure");
+ perror("mmap");
+ lose("Unexpedted mmap(..) failure\n");
}
-
+
return addr;
}
os_protect(os_vm_address_t address, os_vm_size_t length, os_vm_prot_t prot)
{
if(mprotect((void*)address, length, prot) == -1) {
- perror("mprotect");
+ perror("mprotect");
}
}
-static boolean
-in_range_p(os_vm_address_t a, lispobj sbeg, size_t slen)
+static boolean in_range_p(os_vm_address_t a, lispobj sbeg, size_t slen)
{
char* beg = (char*) sbeg;
char* end = (char*) sbeg + slen;
return (adr >= beg && adr < end);
}
-boolean
-is_valid_lisp_addr(os_vm_address_t addr)
+boolean is_valid_lisp_addr(os_vm_address_t addr)
{
- /* Just assume address is valid if it lies within one of the known
+ /* Old CMUCL comment:
+
+ Just assume address is valid if it lies within one of the known
spaces. (Unlike sunos-os which keeps track of every valid page.) */
- return ( in_range_p(addr, READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE)
- || in_range_p(addr, STATIC_SPACE_START , STATIC_SPACE_SIZE )
- || in_range_p(addr, DYNAMIC_0_SPACE_START, DYNAMIC_SPACE_SIZE )
- || in_range_p(addr, DYNAMIC_1_SPACE_START, DYNAMIC_SPACE_SIZE )
- || in_range_p(addr, CONTROL_STACK_START , CONTROL_STACK_SIZE )
- || in_range_p(addr, BINDING_STACK_START , BINDING_STACK_SIZE ));
-}
+ /* FIXME: this looks like a valid definition for all targets with
+ cheney-gc; it may not be impressively smart (witness the
+ comment above) but maybe associating these functions with the
+ GC rather than the OS would be a maintainability win. -- CSR,
+ 2003-04-04 */
+ struct thread *th;
+ if(in_range_p(addr, READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE) ||
+ in_range_p(addr, STATIC_SPACE_START , STATIC_SPACE_SIZE) ||
+#ifdef LISP_FEATURE_GENCGC
+ in_range_p(addr, DYNAMIC_SPACE_START , dynamic_space_size)
+#else
+ in_range_p(addr, DYNAMIC_0_SPACE_START, dynamic_space_size) ||
+ in_range_p(addr, DYNAMIC_1_SPACE_START, dynamic_space_size)
+#endif
+ )
+ return 1;
+ for_each_thread(th) {
+ if((th->control_stack_start <= addr) && (addr < th->control_stack_end))
+ return 1;
+ if(in_range_p(addr, th->binding_stack_start, BINDING_STACK_SIZE))
+ return 1;
+ }
+ return 0;
+}
\f
-#if defined GENCGC
+#if defined LISP_FEATURE_GENCGC
+
+void
+sigsegv_handler(int signal, siginfo_t *info, os_context_t *context)
+{
+ void* fault_addr = (void*)info->si_addr;
+
+#ifdef LISP_FEATURE_SB_SAFEPOINT
+ if (handle_safepoint_violation(context, fault_addr))
+ return;
+#endif
-#error "GENCGC is not yet supported (presumably on x86 solaris?)"
+ if (!gencgc_handle_wp_violation(fault_addr))
+ if(!handle_guard_page_triggered(context, fault_addr))
+ lisp_memory_fault_error(context, fault_addr);
+}
#else
static void
-sigsegv_handler(int signal, siginfo_t *info, void* void_context)
+sigsegv_handler(int signal, siginfo_t *info, os_context_t *context)
{
- os_context_t *context = arch_os_get_context(&void_context);
- os_vm_address_t addr;
+ os_vm_address_t addr = arch_get_bad_addr(signal, info, context);
- addr = arch_get_bad_addr(signal, info, context);
- /* There's some complicated recovery code in linux-os.c here
- that I'm currently too confused to understand. Fixme. */
- if(!interrupt_maybe_gc(signal, info, context)) {
- interrupt_handle_now(signal, info, context);
+ if (!cheneygc_handle_wp_violation(context, addr)) {
+ if (!handle_guard_page_triggered(context,addr))
+ lisp_memory_fault_error(context, addr);
}
}
void
os_install_interrupt_handlers()
{
- undoably_install_low_level_interrupt_handler(SIGSEGV,sigsegv_handler);
+ undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT,
+ sigsegv_handler);
+
+ /* OAOOM c.f. linux-os.c.
+ * Should we have a reusable function gc_install_interrupt_handlers? */
+#ifdef LISP_FEATURE_SB_THREAD
+# ifdef LISP_FEATURE_SB_SAFEPOINT
+# ifdef LISP_FEATURE_SB_THRUPTION
+ undoably_install_low_level_interrupt_handler(SIGPIPE, thruption_handler);
+# endif
+# else
+ undoably_install_low_level_interrupt_handler(SIG_STOP_FOR_GC,
+ sig_stop_for_gc_handler);
+# endif
+#endif
+}
+
+char *
+os_get_runtime_executable_path(int external)
+{
+ char path[] = "/proc/self/object/a.out";
+
+ if (external || access(path, R_OK) == -1)
+ return NULL;
+
+ return copied_string(path);
}
+
+#ifdef LISP_FEATURE_SB_WTIMER
+/*
+ * Waitable timer implementation for the safepoint-based (SIGALRM-free)
+ * timer facility using SunOS completion ports.
+ */
+
+struct os_wtimer {
+ int port;
+ int timer;
+};
+
+struct os_wtimer *
+os_create_wtimer()
+{
+ int port = port_create();
+ if (port == -1) {
+ perror("port_create");
+ lose("os_create_wtimer");
+ }
+
+ port_notify_t pn;
+ pn.portnfy_port = port;
+ pn.portnfy_user = 0;
+
+ struct sigevent ev;
+ memset(&ev, 0, sizeof(ev));
+ ev.sigev_notify = SIGEV_PORT;
+ ev.sigev_value.sival_ptr = &pn;
+
+ timer_t timer;
+ if (timer_create(CLOCK_HIGHRES, &ev, &timer) == -1
+ && (errno != EPERM || timer_create(CLOCK_REALTIME, &ev, &timer) == -1))
+ {
+ perror("timer_create");
+ lose("os_create_wtimer");
+ }
+
+ struct os_wtimer *wt = malloc(sizeof(struct os_wtimer));
+ if (!wt)
+ lose("os_create_wtimer: malloc");
+
+ wt->port = port;
+ wt->timer = timer;
+ return wt;
+}
+
+int
+os_wait_for_wtimer(struct os_wtimer *wt)
+{
+ port_event_t pe;
+ if (port_get(wt->port, &pe, 0) == -1) {
+ if (errno == EINTR)
+ return 1;
+ perror("port_get");
+ lose("os_wtimer_listen failed");
+ }
+ return 0;
+}
+
+void
+os_close_wtimer(struct os_wtimer *wt)
+{
+ if (close(wt->port) == -1) {
+ perror("close");
+ lose("os_close_wtimer");
+ }
+ if (timer_delete(wt->timer) == -1) {
+ perror("timer_delete");
+ lose("os_close_wtimer");
+ }
+ free(wt);
+}
+
+void
+os_set_wtimer(struct os_wtimer *wt, int sec, int nsec)
+{
+ struct itimerspec spec;
+ spec.it_value.tv_sec = sec;
+ spec.it_value.tv_nsec = nsec;
+ spec.it_interval.tv_sec = 0;
+ spec.it_interval.tv_nsec = 0;
+ if (timer_settime(wt->timer, 0, &spec, 0) == -1) {
+ int x = errno;
+ perror("timer_settime");
+ if (x != EINVAL)
+ lose("os_set_wtimer");
+ }
+}
+
+void
+os_cancel_wtimer(struct os_wtimer *wt)
+{
+ os_set_wtimer(wt, 0, 0);
+}
+#endif
projects / sbcl.git / blobdiff