X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fvalidate.c;h=2b9fc69e8e0b323bbb8abdcfc8560ce12b2e66f0;hb=7f1e94ae961a198e00daf281eb1dc858e5b2dcc7;hp=63a5623371d7885f9cd74800384d67b5d0224424;hpb=6cbbf4fbfb46f323fefc50ff28daa42a30d5698e;p=sbcl.git

diff --git a/src/runtime/validate.c b/src/runtime/validate.c
index 63a5623..2b9fc69 100644
--- a/src/runtime/validate.c
+++ b/src/runtime/validate.c
@@ -13,93 +13,116 @@
  * files for more information.
  */
 
-/*
- * $Header$
- */
-
 #include <stdio.h>
+#include <stdlib.h>
+
+#include "sbcl.h"
 #include "runtime.h"
 #include "os.h"
 #include "globals.h"
-#include "sbcl.h"
+#include "interr.h"
 #include "validate.h"
+#include "interr.h"                     /* for declaration of lose */
+
 
-static void ensure_space(lispobj *start, unsigned long size)
+static void
+ensure_space(lispobj *start, uword_t size)
 {
     if (os_validate((os_vm_address_t)start,(os_vm_size_t)size)==NULL) {
-	fprintf(stderr,
-		"ensure_space: failed to validate %ld bytes at 0x%08X\n",
-		size,
-		(unsigned long)start);
-	exit(1);
+        fprintf(stderr,
+                "ensure_space: failed to validate %ld bytes at 0x%08lx\n",
+                size,
+                (uword_t)start);
+        fprintf(stderr,
+                "(hint: Try \"ulimit -a\"; maybe you should increase memory limits.)\n");
+        exit(1);
     }
 }
 
-#ifdef HOLES
-
-static os_vm_address_t holes[] = HOLES;
+os_vm_address_t undefined_alien_address = 0;
 
-static void make_holes(void)
-{
-    int i;
-
-    for (i = 0; i < sizeof(holes)/sizeof(holes[0]); i++) {
-	if (os_validate(holes[i], HOLE_SIZE) == NULL) {
-	    fprintf(stderr,
-		    "make_holes: failed to validate %ld bytes at 0x%08X\n",
-		    HOLE_SIZE,
-		    (unsigned long)holes[i]);
-	    exit(1);
-	}
-	os_protect(holes[i], HOLE_SIZE, 0);
+static void
+ensure_undefined_alien(void) {
+    os_vm_address_t start = os_validate(NULL, os_vm_page_size);
+    if (start) {
+        os_protect(start, os_vm_page_size, OS_VM_PROT_NONE);
+        undefined_alien_address = start;
+    } else {
+        lose("could not allocate guard page for undefined alien\n");
     }
 }
-#endif
 
-void validate(void)
+void
+validate(void)
 {
 #ifdef PRINTNOISE
-	printf("validating memory ...");
-	fflush(stdout);
+    printf("validating memory ...");
+    fflush(stdout);
 #endif
 
-	/* Read-Only Space */
-	read_only_space = (lispobj *) READ_ONLY_SPACE_START;
-	ensure_space(read_only_space, READ_ONLY_SPACE_SIZE);
-
-	/* Static Space */
-	static_space = (lispobj *) STATIC_SPACE_START;
-	ensure_space(static_space, STATIC_SPACE_SIZE);
-
-	/* Dynamic-0 Space */
-	dynamic_0_space = (lispobj *) DYNAMIC_0_SPACE_START;
-	ensure_space(dynamic_0_space, DYNAMIC_SPACE_SIZE);
-
-	current_dynamic_space = dynamic_0_space;
-
-	/* Dynamic-1 Space */
-	dynamic_1_space = (lispobj *) DYNAMIC_1_SPACE_START;
-#ifndef GENCGC
- 	ensure_space(dynamic_1_space, DYNAMIC_SPACE_SIZE);
+    ensure_space( (lispobj *)READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE);
+    ensure_space( (lispobj *)STATIC_SPACE_START   , STATIC_SPACE_SIZE);
+#ifdef LISP_FEATURE_GENCGC
+    ensure_space( (lispobj *)DYNAMIC_SPACE_START  , dynamic_space_size);
+#else
+    ensure_space( (lispobj *)DYNAMIC_0_SPACE_START, dynamic_space_size);
+    ensure_space( (lispobj *)DYNAMIC_1_SPACE_START, dynamic_space_size);
 #endif
 
-	/* Control Stack */
-	control_stack = (lispobj *) CONTROL_STACK_START;
-#ifdef __i386__
-	control_stack_end = (lispobj *) (CONTROL_STACK_START
-					 + CONTROL_STACK_SIZE);
+#ifdef LISP_FEATURE_LINKAGE_TABLE
+    ensure_space( (lispobj *)LINKAGE_TABLE_SPACE_START,
+                  LINKAGE_TABLE_SPACE_SIZE);
 #endif
-	ensure_space(control_stack, CONTROL_STACK_SIZE);
-
-	/* Binding Stack */
-	binding_stack = (lispobj *) BINDING_STACK_START;
-	ensure_space(binding_stack, BINDING_STACK_SIZE);
 
-#ifdef HOLES
-	make_holes();
+#ifdef LISP_FEATURE_OS_PROVIDES_DLOPEN
+    ensure_undefined_alien();
 #endif
 
 #ifdef PRINTNOISE
-	printf(" done.\n");
+    printf(" done.\n");
 #endif
 }
+
+static inline void
+protect_page(void *page, int protect_p, os_vm_prot_t flags) {
+    os_protect(page, os_vm_page_size, protect_p ?
+               flags : OS_VM_PROT_ALL);
+}
+
+#define DEF_PROTECT_PAGE(name,page_name,flags)                          \
+    void                                                                \
+    protect_##name(int protect_p, struct thread *thread) {              \
+        if (!thread)                                                    \
+            thread = arch_os_get_current_thread();                      \
+        protect_page(page_name(thread), protect_p, flags);              \
+    }
+
+DEF_PROTECT_PAGE(control_stack_hard_guard_page,
+                 CONTROL_STACK_HARD_GUARD_PAGE,
+                 OS_VM_PROT_NONE)
+DEF_PROTECT_PAGE(control_stack_guard_page,
+                 CONTROL_STACK_GUARD_PAGE,
+                 OS_VM_PROT_READ|OS_VM_PROT_EXECUTE)
+DEF_PROTECT_PAGE(control_stack_return_guard_page,
+                 CONTROL_STACK_RETURN_GUARD_PAGE,
+                 OS_VM_PROT_READ|OS_VM_PROT_EXECUTE)
+
+DEF_PROTECT_PAGE(binding_stack_hard_guard_page,
+                 BINDING_STACK_HARD_GUARD_PAGE,
+                 OS_VM_PROT_NONE)
+DEF_PROTECT_PAGE(binding_stack_guard_page,
+                 BINDING_STACK_GUARD_PAGE,
+                 OS_VM_PROT_NONE)
+DEF_PROTECT_PAGE(binding_stack_return_guard_page,
+                 BINDING_STACK_RETURN_GUARD_PAGE,
+                 OS_VM_PROT_NONE)
+
+DEF_PROTECT_PAGE(alien_stack_hard_guard_page,
+                 ALIEN_STACK_HARD_GUARD_PAGE,
+                 OS_VM_PROT_NONE)
+DEF_PROTECT_PAGE(alien_stack_guard_page,
+                 ALIEN_STACK_GUARD_PAGE,
+                 OS_VM_PROT_NONE)
+DEF_PROTECT_PAGE(alien_stack_return_guard_page,
+                 ALIEN_STACK_RETURN_GUARD_PAGE,
+                 OS_VM_PROT_NONE)