#include "os.h"
#include "arch.h"
#include "globals.h"
-#include "sbcl.h"
#include "interrupt.h"
#include "interr.h"
#include "lispregs.h"
+#include "runtime.h"
+#include "genesis/static-symbols.h"
+#include "genesis/fdefn.h"
#include <sys/socket.h>
#include <sys/utsname.h>
#include "thread.h"
size_t os_vm_page_size;
-#ifdef LISP_FEATURE_SB_FUTEX
-#include <asm/unistd.h>
+#ifdef LISP_FEATURE_SB_THREAD
+#include <linux/unistd.h>
#include <errno.h>
/* values taken from the kernel's linux/futex.h. This header file
#include "gc.h"
\f
int linux_sparc_siginfo_bug = 0;
-int linux_supports_futex=0;
+int linux_no_threads_p = 0;
-void os_init(void)
+void
+os_init(void)
{
/* Conduct various version checks: do we have enough mmap(), is
* this a sparc running 2.2, can we do threads? */
+#ifdef LISP_FEATURE_SB_THREAD
int *futex=0;
+#endif
struct utsname name;
int major_version;
int minor_version;
major_version);
}
if (!(major_version>2 || minor_version >= 4)) {
-#ifdef LISP_FEATURE_SB_THREAD
- lose("linux kernel 2.4 required for thread-enabled SBCL");
-#endif
#ifdef LISP_FEATURE_SPARC
FSHOW((stderr,"linux kernel %d.%d predates 2.4;\n enabling workarounds for SPARC kernel bugs in signal handling.\n", major_version,minor_version));
linux_sparc_siginfo_bug = 1;
#endif
}
-#ifdef LISP_FEATURE_SB_FUTEX
+#ifdef LISP_FEATURE_SB_THREAD
futex_wait(futex,-1);
- if(errno!=ENOSYS) linux_supports_futex=1;
+ if(errno==ENOSYS) linux_no_threads_p = 1;
+ if(linux_no_threads_p)
+ fprintf(stderr,"Linux with NPTL support (e.g. kernel 2.6 or newer) required for \nthread-enabled SBCL. Disabling thread support.\n\n");
#endif
os_vm_page_size = getpagesize();
}
os_vm_address_t
os_map(int fd, int offset, os_vm_address_t addr, os_vm_size_t len)
{
- addr = mmap(addr, len,
- OS_VM_PROT_ALL,
- MAP_PRIVATE | MAP_FILE | MAP_FIXED,
- fd, (off_t) offset);
+ os_vm_address_t actual;
- if (addr == MAP_FAILED) {
+ actual = mmap(addr, len, OS_VM_PROT_ALL, MAP_PRIVATE | MAP_FIXED,
+ fd, (off_t) offset);
+ if (actual == MAP_FAILED || (addr && (addr != actual))) {
perror("mmap");
lose("unexpected mmap(..) failure");
}
- return addr;
+ return actual;
}
void
}
}
\f
-/* FIXME: Now that FOO_END, rather than FOO_SIZE, is the fundamental
- * description of a space, we could probably punt this and just do
- * (FOO_START <= x && x < FOO_END) everywhere it's called. */
-static boolean
-in_range_p(os_vm_address_t a, lispobj sbeg, size_t slen)
-{
- char* beg = (char*)((long)sbeg);
- char* end = (char*)((long)sbeg) + slen;
- char* adr = (char*)a;
- return (adr >= beg && adr < end);
-}
-
boolean
is_valid_lisp_addr(os_vm_address_t addr)
{
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) ||
- in_range_p(addr, DYNAMIC_SPACE_START , DYNAMIC_SPACE_SIZE))
+ size_t ad = (size_t) addr;
+
+ if ((READ_ONLY_SPACE_START <= ad && ad < READ_ONLY_SPACE_END)
+ || (STATIC_SPACE_START <= ad && ad < STATIC_SPACE_END)
+#if defined LISP_FEATURE_GENCGC
+ || (DYNAMIC_SPACE_START <= ad && ad < DYNAMIC_SPACE_END)
+#else
+ || (DYNAMIC_0_SPACE_START <= ad && ad < DYNAMIC_SPACE_END)
+ || (DYNAMIC_1_SPACE_START <= ad && ad < DYNAMIC_SPACE_END)
+#endif
+ )
return 1;
for_each_thread(th) {
- if((th->control_stack_start <= addr) && (addr < th->control_stack_end))
+ if((size_t)(th->control_stack_start) <= ad
+ && ad < (size_t)(th->control_stack_end))
return 1;
- if(in_range_p(addr, th->binding_stack_start, BINDING_STACK_SIZE))
+ if((size_t)(th->binding_stack_start) <= ad
+ && ad < (size_t)(th->binding_stack_start + BINDING_STACK_SIZE))
return 1;
}
return 0;
* The GENCGC needs to be hooked into whatever signal is raised for
* page fault on this OS.
*/
-void
+static void
sigsegv_handler(int signal, siginfo_t *info, void* void_context)
{
os_context_t *context = arch_os_get_context(&void_context);
- void* fault_addr = (void*)context->uc_mcontext.cr2;
+ void* fault_addr = (void*)info->si_addr;
if (!gencgc_handle_wp_violation(fault_addr))
- if(!handle_control_stack_guard_triggered(context,fault_addr))
- interrupt_handle_now(signal, info, void_context);
+ 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);
+#endif
}
#else
sigsegv_handler(int signal, siginfo_t *info, void* void_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);
+
+#ifdef LISP_FEATURE_ALPHA
+ /* Alpha stuff: This is the end of a pseudo-atomic section during
+ which a signal was received. We must deal with the pending
+ interrupt (see also interrupt.c, ../code/interrupt.lisp)
- addr = arch_get_bad_addr(signal,info,context);
+ (how we got here: when interrupting, we set bit 63 in reg_ALLOC.
+ At the end of the atomic section we tried to write to reg_ALLOC,
+ got a SIGSEGV (there's nothing mapped there) so ended up here. */
if (addr != NULL &&
*os_context_register_addr(context,reg_ALLOC) & (1L<<63)){
-
- /* Alpha stuff: This is the end of a pseudo-atomic section
- * during which a signal was received. We must deal with the
- * pending interrupt (see also interrupt.c,
- * ../code/interrupt.lisp)
- */
- /* (how we got here: when interrupting, we set bit 63 in
- * reg_Alloc. At the end of the atomic section we tried to
- * write to reg_ALLOC, got a SIGSEGV (there's nothing mapped
- * there) so ended up here
- */
*os_context_register_addr(context,reg_ALLOC) -= (1L<<63);
interrupt_handle_pending(context);
- } else {
- if(!interrupt_maybe_gc(signal, info, context))
- if(!handle_control_stack_guard_triggered(context,addr))
- interrupt_handle_now(signal, info, context);
+ return;
}
-}
#endif
-void sigcont_handler(int signal, siginfo_t *info, void *void_context)
-{
- /* We need to have a handler installed for this signal so that
- * sigwaitinfo() for it actually returns at the appropriate time.
- * We don't need it to actually do anything. This mkes it
- * possibly the only signal handler in SBCL that doesn't depend on
- * not-guaranteed-by-POSIX features
- */
+ if(!interrupt_maybe_gc(signal, info, context))
+ if(!handle_guard_page_triggered(context,addr))
+ interrupt_handle_now(signal, info, context);
}
+#endif
void
os_install_interrupt_handlers(void)
interrupt_thread_handler);
undoably_install_low_level_interrupt_handler(SIG_STOP_FOR_GC,
sig_stop_for_gc_handler);
- if(!linux_supports_futex)
- undoably_install_low_level_interrupt_handler(SIG_DEQUEUE,
- sigcont_handler);
+ undoably_install_low_level_interrupt_handler(SIG_THREAD_EXIT,
+ thread_exit_handler);
#endif
}
-#ifdef LISP_FEATURE_SB_FUTEX
-int futex_wait(int *lock_word, int oldval) {
+#ifdef LISP_FEATURE_SB_THREAD
+int
+futex_wait(int *lock_word, int oldval)
+{
int t= sys_futex(lock_word,FUTEX_WAIT,oldval, 0);
return t;
}
-int futex_wake(int *lock_word, int n){
+
+int
+futex_wake(int *lock_word, int n)
+{
return sys_futex(lock_word,FUTEX_WAKE,n,0);
}
#endif
projects / sbcl.git / blobdiff