#include "gencgc-internal.h"
#endif
-#if defined LISP_FEATURE_SPARC
-#define OS_VM_DEFAULT_PAGESIZE 8192
-#elif defined LISP_FEATURE_X86
-#define OS_VM_DEFAULT_PAGESIZE 4096
-#else
-#error "Don't know OS_VM_DEFAULT_PAGESIZE"
+#ifdef LISP_FEATURE_SB_WTIMER
+# include <port.h>
+# include <time.h>
+# include <errno.h>
#endif
-long os_vm_page_size=(-1);
-static long os_real_page_size=(-1);
-
-static os_vm_size_t real_page_size_difference=0;
-
-/* So, this sucks. Versions of Solaris prior to 8 (SunOS releases
- earlier than 5.8) do not support MAP_ANON passed as a flag to
- mmap(). However, we would like SBCL compiled on SunOS 5.7 but
- running on 5.8 to use MAP_ANON, but because of C's lack of
- introspection at runtime, we can't grab the right value because
- it's stuffed in a header file somewhere. We can, however, hardcode
- it, and test at runtime for whether to use it... -- CSR, 2002-05-06
-
- And, in fact, it sucks slightly more, as if you don't use MAP_ANON
- you need to have /dev/zero open and pass the file descriptor to
- mmap(). So overall, this counts as a KLUDGE. -- CSR, 2002-05-20 */
-int KLUDGE_MAYBE_MAP_ANON = 0x0;
-int kludge_mmap_fd = -1; /* default for MAP_ANON */
+os_vm_size_t os_vm_page_size=0;
void
os_init(char *argv[], char *envp[])
{
- struct utsname name;
- int major_version;
- int minor_version;
-
- uname(&name);
- major_version = atoi(name.release);
- if (major_version != 5) {
- lose("sunos major version=%d (which isn't 5!)\n", major_version);
- }
- minor_version = atoi(name.release+2);
- if ((minor_version == 8) ||
- (minor_version == 9) ||
- (minor_version == 10)) {
- KLUDGE_MAYBE_MAP_ANON = 0x100;
- } else if (minor_version > 10) {
- FSHOW((stderr, "os_init: Solaris version greater than 9?\nUnknown MAP_ANON behaviour.\n"));
- lose("Unknown mmap() interaction with MAP_ANON\n");
- } else { /* minor_version < 8 */
- kludge_mmap_fd = open("/dev/zero",O_RDONLY);
- if (kludge_mmap_fd < 0) {
- perror("open");
- lose("Error in open(..)\n");
- }
- }
-
- /* 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;
- }
+ /*
+ * 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)
{
- int flags = MAP_PRIVATE | MAP_NORESERVE | KLUDGE_MAYBE_MAP_ANON;
+ int flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANON;
if (addr)
flags |= MAP_FIXED;
- addr = mmap(addr, len,
- OS_VM_PROT_ALL,
- flags,
- kludge_mmap_fd, 0);
+ addr = mmap(addr, len, OS_VM_PROT_ALL, flags, -1, 0);
if (addr == MAP_FAILED) {
perror("mmap");
- lose ("Error in mmap(..)\n");
+ /* 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;
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)
+ 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)
+ 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;
#if defined LISP_FEATURE_GENCGC
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);
void* fault_addr = (void*)info->si_addr;
- if(info->si_code == 1)
- {
- perror("error: SEGV_MAPERR\n");
- exit(1);
- }
- if (!gencgc_handle_wp_violation(fault_addr))
- if(!handle_guard_page_triggered(context, fault_addr))
-#ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
- arrange_return_to_lisp_function(context,
- SymbolFunction(MEMORY_FAULT_ERROR));
-#else
- interrupt_handle_now(signal, info, context);
+#ifdef LISP_FEATURE_SB_SAFEPOINT
+ if (handle_safepoint_violation(context, fault_addr))
+ return;
#endif
+
+ 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);
- if(!interrupt_maybe_gc(signal, info, context)) {
- if(!handle_guard_page_triggered(context,addr))
- 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);
}
}
{
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()
+os_get_runtime_executable_path(int external)
{
- int ret;
char path[] = "/proc/self/object/a.out";
- ret = access(path, R_OK);
- if (ret == -1)
+ 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