[llvm-commits] CVS: llvm-www/pubs/2006-DSN-DanglingPointers.html 2006-DSN-DanglingPointers.pdf

Mon May 5 07:08:06 PDT 2008

Changes in directory llvm-www/pubs:

2006-DSN-DanglingPointers.html added (r1.1)
2006-DSN-DanglingPointers.pdf added (r1.1)
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Log message:

Adding Dinakar's DSN paper.

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 2006-DSN-DanglingPointers.pdf  |    0 
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Index: llvm-www/pubs/2006-DSN-DanglingPointers.html
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+ <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+ <html>
+ <head>
+   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+   <link rel="stylesheet" href="../llvm.css" type="text/css" media="screen">
+   <title>
+   Efficiently Detecting All Dangling Pointer Uses in Production Servers
+   </title>
+ </head>
+ <body>
+ 
+ <div class="pub_title">
+ Efficiently Detecting All Dangling Pointer Uses in Production Servers
+ </div>
+ <div class="pub_author">
+   Dinakar Dhurjati and
+   <a href="http://www.cs.uiuc.edu/~vadve">Vikram Adve</a>
+ </div>
+ 
+ <h2>Abstract:</h2>
+ <blockquote>
+ In this paper, we propose a novel technique to detect all
+ dangling pointer uses at run-time that is efficient enough
+ for production use in server codes. One idea (previously
+ used by Electric Fence, PageHeap) is to use a new virtual
+ page for each allocation of the program and rely on page
+ protection mechanisms to check dangling pointer accesses.
+ This naive approach has two limitations that makes it im-
+ practical to use in production software: increased physical
+ memory usage and increased address space usage. We pro-
+ pose two key improvements that alleviate both these prob-
+ lems. First, we use a new virtual page for each allocation
+ of the program but map it to the same physical page as the
+ original allocator. This allows using nearly identical physi-
+ cal memory as the original program while still retaining the
+ dangling pointer detection capability. We also show how to
+ implement this idea without requiring any changes to the
+ underlying memory allocator. Our second idea alleviates
+ the problem of virtual address space exhaustion by using
+ a previously developed compiler transformation called Au-
+ tomatic Pool Allocation to reuse many virtual pages. The
+ transformation partitions the memory of the program based
+ on their lifetimes and allows us to reuse virtual pages when
+ portions of memory become inaccessible. Experimentally
+ we find that the run-time overhead for five unix servers is
+ less than 4%, for other unix utilities less than 15%. How-
+ ever, in case of allocation intensive benchmarks, we find our
+ overheads are much worse (up to 11x slowdown).
+ </blockquote>
+ 
+ <h2>Download:</h2>
+ <h3>Paper:</h3>
+ <ul>
+   <li><a href="2006-DSN-DanglingPointers.html.pdf">
+   Efficiently Detecting All Dangling Pointer Uses in Production Servers
+   </a> (PDF)</li>
+ </ul>
+ 
+ <h2>BibTeX Entry:</h2>
+ <pre>
+ @inproceedings{1135707,
+  author = {Dinakar Dhurjati and Vikram Adve},
+  title = {Efficiently Detecting All Dangling Pointer Uses in Production Servers},
+  booktitle = {DSN '06: Proceedings of the International Conference on Dependable Systems and Networks},
+  year = {2006},
+  isbn = {0-7695-2607-1},
+  pages = {269--280},
+  doi = {http://dx.doi.org/10.1109/DSN.2006.31},
+  publisher = {IEEE Computer Society},
+  address = {Washington, DC, USA},
+ }
+ </pre>
+ 
+ <!-- *********************************************************************** -->
+ <hr>
+   <a href="http://jigsaw.w3.org/css-validator/check/referer"><img
+   src="http://jigsaw.w3.org/css-validator/images/vcss" alt="Valid CSS!"></a>
+   <a href="http://validator.w3.org/check/referer"><img
+   src="http://www.w3.org/Icons/valid-html401" alt="Valid HTML 4.01!" /></a>
+ 
+ </body>
+ </html>

Index: llvm-www/pubs/2006-DSN-DanglingPointers.pdf