Update copyright years.

[thirdparty/gcc.git] / libbacktrace / mmapio.c

diff --git a/libbacktrace/mmapio.c b/libbacktrace/mmapio.c
index 60c68c66c35a323fda609fde4e81407bc69303b1..b780c3d07dff4d7603e66f2cbfb75363bde26426 100644 (file)
--- a/libbacktrace/mmapio.c
+++ b/libbacktrace/mmapio.c
@@ -1,5 +1,5 @@
 /* mmapio.c -- File views using mmap.
-   Copyright (C) 2012-2013 Free Software Foundation, Inc.
+   Copyright (C) 2012-2024 Free Software Foundation, Inc.
    Written by Ian Lance Taylor, Google.
 
 Redistribution and use in source and binary forms, with or without
@@ -7,13 +7,13 @@ modification, are permitted provided that the following conditions are
 met:
 
     (1) Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer. 
+    notice, this list of conditions and the following disclaimer.
 
     (2) Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in
     the documentation and/or other materials provided with the
-    distribution.  
-    
+    distribution.
+
     (3) The name of the author may not be used to
     endorse or promote products derived from this software without
     specific prior written permission.
@@ -40,6 +40,10 @@ POSSIBILITY OF SUCH DAMAGE.  */
 #include "backtrace.h"
 #include "internal.h"
 
+#ifndef HAVE_DECL_GETPAGESIZE
+extern int getpagesize (void);
+#endif
+
 #ifndef MAP_FAILED
 #define MAP_FAILED ((void *)-1)
 #endif
@@ -51,7 +55,7 @@ POSSIBILITY OF SUCH DAMAGE.  */
 
 int
 backtrace_get_view (struct backtrace_state *state ATTRIBUTE_UNUSED,
-                   int descriptor, off_t offset, size_t size,
+                   int descriptor, off_t offset, uint64_t size,
                    backtrace_error_callback error_callback,
                    void *data, struct backtrace_view *view)
 {
@@ -60,6 +64,12 @@ backtrace_get_view (struct backtrace_state *state ATTRIBUTE_UNUSED,
   off_t pageoff;
   void *map;
 
+  if ((uint64_t) (size_t) size != size)
+    {
+      error_callback (data, "file size too large", 0);
+      return 0;
+    }
+
   pagesize = getpagesize ();
   inpage = offset % pagesize;
   pageoff = offset - inpage;