From cdd7e2444cac5765557ebecd53ae91b7d2bcb0f1 Mon Sep 17 00:00:00 2001
From: Cary Coutant <ccoutant@google.com>
Date: Mon, 17 Oct 2011 23:36:43 +0000
Subject: [PATCH] 	PR gold/13288 	* gold/fileread.cc
 (File_read::find_view): Add assert. 	(File_read::make_view): Move bounds
 check (replace with assert)... 	(File_read::find_or_make_view): ... to
 here.

---
 gold/ChangeLog   |  7 +++++++
 gold/fileread.cc | 27 +++++++++++++++++----------
 2 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/gold/ChangeLog b/gold/ChangeLog
index e6e8a9b..e89bf81 100644
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -1,3 +1,10 @@
+2011-10-17  Cary Coutant  <ccoutant@google.com>
+
+	PR gold/13288
+	* gold/fileread.cc (File_read::find_view): Add assert.
+	(File_read::make_view): Move bounds check (replace with assert)...
+	(File_read::find_or_make_view): ... to here.
+
 2011-10-12  Cary Coutant  <ccoutant@google.com>
 
 	* gold/output.cc (Output_file::open_base_file): Handle case where
diff --git a/gold/fileread.cc b/gold/fileread.cc
index 80ddfbc..c5dc320 100644
--- a/gold/fileread.cc
+++ b/gold/fileread.cc
@@ -329,6 +329,10 @@ inline File_read::View*
 File_read::find_view(off_t start, section_size_type size,
 		     unsigned int byteshift, File_read::View** vshifted) const
 {
+  gold_assert(start <= this->size_
+	      && (static_cast<unsigned long long>(size)
+		  <= static_cast<unsigned long long>(this->size_ - start)));
+
   if (vshifted != NULL)
     *vshifted = NULL;
 
@@ -456,16 +460,9 @@ File_read::make_view(off_t start, section_size_type size,
 		     unsigned int byteshift, bool cache)
 {
   gold_assert(size > 0);
-
-  // Check that start and end of the view are within the file.
-  if (start > this->size_
-      || (static_cast<unsigned long long>(size)
-          > static_cast<unsigned long long>(this->size_ - start)))
-    gold_fatal(_("%s: attempt to map %lld bytes at offset %lld exceeds "
-                 "size of file; the file may be corrupt"),
-		   this->filename().c_str(),
-		   static_cast<long long>(size),
-		   static_cast<long long>(start));
+  gold_assert(start <= this->size_
+	      && (static_cast<unsigned long long>(size)
+		  <= static_cast<unsigned long long>(this->size_ - start)));
 
   off_t poff = File_read::page_offset(start);
 
@@ -523,6 +520,16 @@ File_read::View*
 File_read::find_or_make_view(off_t offset, off_t start,
 			     section_size_type size, bool aligned, bool cache)
 {
+  // Check that start and end of the view are within the file.
+  if (start > this->size_
+      || (static_cast<unsigned long long>(size)
+          > static_cast<unsigned long long>(this->size_ - start)))
+    gold_fatal(_("%s: attempt to map %lld bytes at offset %lld exceeds "
+                 "size of file; the file may be corrupt"),
+		   this->filename().c_str(),
+		   static_cast<long long>(size),
+		   static_cast<long long>(start));
+
   unsigned int byteshift;
   if (offset == 0)
     byteshift = 0;
-- 
2.7.4