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Re: Research to Create Automated Buffer Overflow Protection

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From Melzzzzz <mel@zzzzz.invalid>
Newsgroups comp.programming
Subject Re: Research to Create Automated Buffer Overflow Protection
Date Tue, 26 Aug 2014 20:16:34 +0200
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On Tue, 26 Aug 2014 18:16:47 +0100
Richard Heathfield <invalid@see.sig.invalid> wrote:

> 
> If you add bounds-checking to C (which is what we're talking about,
> really), (a) you discover eventually that people have already done
> it, and (b) bounds-checking imposes a performance penalty that at
> least some people are not prepared to tolerate.

For example take scimark2 in "go" language:
with bounds checking
 bmaxa@maxa:~/examples/go/src/github.com/bmaxa/sci$ go build -o scimark2
bmaxa@maxa:~/examples/go/src/github.com/bmaxa/sci$ time ./scimark2
**                                                              **
** SciMark2 Numeric Benchmark, see http://math.nist.gov/scimark **
** for details. (Results can be submitted to pozo@nist.gov)     **
**                                                              **
Using       2.00 seconds min time per kernel.
Composite Score:         1060.91
FFT             Mflops:   933.39    (N=1024)
SOR             Mflops:  1235.80    (100 x 100)
MonteCarlo:     Mflops:   179.01
Sparse matmult  Mflops:  1485.93    (N=1000, nz=5000)
LU              Mflops:  1470.43    (M=100, N=100)

real	0m34.279s
user	0m34.232s
sys	0m0.055s
without:
bmaxa@maxa:~/examples/go/src/github.com/bmaxa/sci$ go build -o scimark2 -gcflags -B
bmaxa@maxa:~/examples/go/src/github.com/bmaxa/sci$ time ./scimark2
**                                                              **
** SciMark2 Numeric Benchmark, see http://math.nist.gov/scimark **
** for details. (Results can be submitted to pozo@nist.gov)     **
**                                                              **
Using       2.00 seconds min time per kernel.
Composite Score:         1231.16
FFT             Mflops:  1177.07    (N=1024)
SOR             Mflops:  1258.24    (100 x 100)
MonteCarlo:     Mflops:   168.89
Sparse matmult  Mflops:  1702.12    (N=1000, nz=5000)
LU              Mflops:  1849.46    (M=100, N=100)

real	0m30.569s
user	0m30.531s
sys	0m0.046s

It is 20% faster without bounds checking !



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Research to Create Automated Buffer Overflow Protection Heidi Brayer <hap1026@gmail.com> - 2014-08-26 09:11 -0700
  Re: Research to Create Automated Buffer Overflow Protection "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-08-26 18:54 +0200
    Re: Research to Create Automated Buffer Overflow Protection Richard Heathfield <invalid@see.sig.invalid> - 2014-08-26 18:16 +0100
      Re: Research to Create Automated Buffer Overflow Protection "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-08-26 19:35 +0200
        Re: Research to Create Automated Buffer Overflow Protection Richard Heathfield <invalid@see.sig.invalid> - 2014-08-26 18:59 +0100
          Re: Research to Create Automated Buffer Overflow Protection "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-08-26 21:26 +0200
            Re: Research to Create Automated Buffer Overflow Protection Richard Heathfield <invalid@see.sig.invalid> - 2014-08-26 20:33 +0100
              Re: Research to Create Automated Buffer Overflow Protection "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-08-26 21:50 +0200
                Re: Research to Create Automated Buffer Overflow Protection Richard Heathfield <invalid@see.sig.invalid> - 2014-08-26 21:41 +0100
                Re: Research to Create Automated Buffer Overflow Protection "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-08-27 10:21 +0200
                Re: Research to Create Automated Buffer Overflow Protection "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2014-08-27 10:27 +0100
                Re: Research to Create Automated Buffer Overflow Protection "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-08-27 11:51 +0200
        Re: Research to Create Automated Buffer Overflow Protection Melzzzzz <mel@zzzzz.invalid> - 2014-08-26 20:39 +0200
          Re: Research to Create Automated Buffer Overflow Protection "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2014-08-26 20:13 +0100
          Re: Research to Create Automated Buffer Overflow Protection "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-08-26 21:38 +0200
            Re: Research to Create Automated Buffer Overflow Protection Melzzzzz <mel@zzzzz.com> - 2014-08-26 23:11 +0200
              Re: Research to Create Automated Buffer Overflow Protection "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-08-27 09:50 +0200
                Re: Research to Create Automated Buffer Overflow Protection "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2014-08-27 10:16 +0100
                Re: Research to Create Automated Buffer Overflow Protection "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-08-27 12:15 +0200
                Re: Research to Create Automated Buffer Overflow Protection Richard Heathfield <invalid@see.sig.invalid> - 2014-08-27 14:40 +0100
            Re: Research to Create Automated Buffer Overflow Protection "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2014-08-27 10:13 +0100
              Re: Research to Create Automated Buffer Overflow Protection "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-08-27 14:06 +0200
            Re: Research to Create Automated Buffer Overflow Protection "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2014-08-27 10:32 +0100
              Re: Research to Create Automated Buffer Overflow Protection "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2014-08-27 12:14 +0200
        Re: Research to Create Automated Buffer Overflow Protection "Chris M. Thomasson" <no@spam.invalid> - 2014-08-26 14:06 -0700
      Re: Research to Create Automated Buffer Overflow Protection Melzzzzz <mel@zzzzz.invalid> - 2014-08-26 20:16 +0200
        Re: Research to Create Automated Buffer Overflow Protection Öö Tiib <ootiib@hot.ee> - 2014-08-30 09:20 -0700
  Re: Research to Create Automated Buffer Overflow Protection Jongware <jongware@no-spam.plz> - 2014-09-15 10:47 +0200
    Re: Research to Create Automated Buffer Overflow Protection Richard Heathfield <invalid@see.sig.invalid> - 2014-09-15 10:46 +0100

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