#include "runtime.h"
#include "genesis/static-symbols.h"
#include "genesis/fdefn.h"
+
#include <sys/socket.h>
#include <sys/utsname.h>
+#include <errno.h>
#include <sys/types.h>
#include <signal.h>
size_t os_vm_page_size;
-#ifdef LISP_FEATURE_SB_THREAD
+#if defined(LISP_FEATURE_SB_THREAD) && !defined(LISP_FEATURE_SB_LUTEX) && !defined(LISP_FEATURE_SB_PTHREAD_FUTEX)
#include <sys/syscall.h>
#include <unistd.h>
#include <errno.h>
int
futex_wait(int *lock_word, int oldval)
{
- int t= sys_futex(lock_word,FUTEX_WAIT,oldval, 0);
+ int t;
+ again:
+ t = sys_futex(lock_word,FUTEX_WAIT,oldval, 0);
+
+ /* Interrupted FUTEX_WAIT calls may return early.
+ *
+ * If someone manages to wake the futex while we're spinning
+ * around it, we will just return with -1 and errno EWOULDBLOCK,
+ * because the value has changed, so that's ok. */
+ if (t != 0 && errno == EINTR)
+ goto again;
+
return t;
}
\f
int linux_sparc_siginfo_bug = 0;
+
+/* This variable was in real use for a few months, basically for
+ * storing autodetected information about whether the Linux
+ * installation was recent enough to support SBCL threads, and make
+ * some run-time decisions based on that. But this turned out to be
+ * unstable, so now we just flat-out refuse to start on the old installations
+ * when thread support has been compiled in.
+ *
+ * Unfortunately, in the meanwhile Slime started depending on this
+ * variable for deciding which communication style to use. So even
+ * though this variable looks unused, it shouldn't be deleted until
+ * it's no longer used in the versions of Slime that people are
+ * likely to download first. -- JES, 2006-06-07
+ */
int linux_no_threads_p = 0;
#ifdef LISP_FEATURE_SB_THREAD
{
/* 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
+#if defined(LISP_FEATURE_SB_THREAD) && !defined(LISP_FEATURE_SB_LUTEX) && !defined(LISP_FEATURE_SB_PTHREAD_FUTEX)
int *futex=0;
#endif
struct utsname name;
int major_version;
int minor_version;
+ int patch_version;
char *p;
uname(&name);
p=name.release;
major_version = atoi(p);
p=strchr(p,'.')+1;
minor_version = atoi(p);
+ p=strchr(p,'.')+1;
+ patch_version = atoi(p);
if (major_version<2) {
- lose("linux kernel version too old: major version=%d (can't run in version < 2.0.0)",
+ lose("linux kernel version too old: major version=%d (can't run in version < 2.0.0)\n",
major_version);
}
if (!(major_version>2 || minor_version >= 4)) {
#endif
}
#ifdef LISP_FEATURE_SB_THREAD
+#if !defined(LISP_FEATURE_SB_LUTEX) && !defined(LISP_FEATURE_SB_PTHREAD_FUTEX)
futex_wait(futex,-1);
if(errno==ENOSYS) {
- lose("This version of SBCL is compiled with threading support, but your kernel is too old to support this.\n\
-Please use a more recent kernel or a version of SBCL without threading support.\n");
+ lose("This version of SBCL is compiled with threading support, but your kernel\n"
+ "is too old to support this. Please use a more recent kernel or\n"
+ "a version of SBCL without threading support.\n");
}
+#endif
if(! isnptl()) {
- lose("This version of SBCL only works correctly with the NPTL threading library. Please use a newer glibc, use an older SBCL, or stop using LD_ASSUME_KERNEL");
+ lose("This version of SBCL only works correctly with the NPTL threading\n"
+ "library. Please use a newer glibc, use an older SBCL, or stop using\n"
+ "LD_ASSUME_KERNEL\n");
}
#endif
os_vm_page_size = getpagesize();
* don't do this trick on other platforms.
*/
#ifdef LISP_FEATURE_X86
- if ((major_version == 2 && minor_version >= 6)
+ if ((major_version == 2
+ /* Some old kernels will apparently lose unsupported personality flags
+ * on exec() */
+ && ((minor_version == 6 && patch_version >= 11)
+ || (minor_version > 6)))
|| major_version >= 3)
{
int pers = personality(0xffffffffUL);
fprintf(stderr, "WARNING: Couldn't re-execute SBCL with the proper personality flags (maybe /proc isn't mounted?). Trying to continue anyway.\n");
}
}
+ /* Use SSE detector. Recent versions of Linux enable SSE support
+ * on SSE capable CPUs. */
+ /* FIXME: Are there any old versions that does not support SSE? */
+ fast_bzero_pointer = fast_bzero_detect;
#endif
}
fd, (off_t) offset);
if (actual == MAP_FAILED || (addr && (addr != actual))) {
perror("mmap");
- lose("unexpected mmap(..) failure");
+ lose("unexpected mmap(..) failure\n");
}
return actual;
os_protect(os_vm_address_t address, os_vm_size_t length, os_vm_prot_t prot)
{
if (mprotect(address, length, prot) == -1) {
- perror("mprotect");
+ if (errno == ENOMEM) {
+ lose("An mprotect call failed with ENOMEM. This probably means that the maximum amount\n"
+ "of separate memory mappings was exceeded. To fix the problem, either increase\n"
+ "the maximum with e.g. 'echo 262144 > /proc/sys/vm/max_map_count' or recompile\n"
+ "SBCL with a larger value for GENCGC-PAGE-SIZE in 'src/target/parms.lisp'.");
+ } else {
+ perror("mprotect");
+ }
}
}
\f
#endif
if (!handle_guard_page_triggered(context, addr))
#ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK
- arrange_return_to_lisp_function(context, SymbolFunction(MEMORY_FAULT_ERROR));
+ lisp_memory_fault_error(context, addr);
#else
interrupt_handle_now(signal, info, context);
#endif
sig_stop_for_gc_handler);
#endif
}
+
+char *
+os_get_runtime_executable_path()
+{
+ char path[PATH_MAX + 1];
+ int size;
+
+ size = readlink("/proc/self/exe", path, sizeof(path)-1);
+ if (size < 0)
+ return NULL;
+ else
+ path[size] = '\0';
+
+ return copied_string(path);
+}
projects / sbcl.git / blobdiff