X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Flinux-os.c;h=026923ae15d81c4d2d21b8a32a99dbfd995d62fa;hb=03363f0145ab5e88a17a4b881068dc921f7d122f;hp=2b1dd2522af94fc3ad7efa1ca5c5d0332f0121c5;hpb=a499f2c9099d1dc2cb4227a2505eb4cc6f310e24;p=sbcl.git

diff --git a/src/runtime/linux-os.c b/src/runtime/linux-os.c
index 2b1dd25..026923a 100644
--- a/src/runtime/linux-os.c
+++ b/src/runtime/linux-os.c
@@ -36,6 +36,7 @@
 #include "genesis/fdefn.h"
 #include <sys/socket.h>
 #include <sys/utsname.h>
+#include <errno.h>
 
 #include <sys/types.h>
 #include <signal.h>
@@ -284,7 +285,14 @@ void
 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");
+        }
     }
 }
 
@@ -370,3 +378,18 @@ os_install_interrupt_handlers(void)
                                                  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);
+}