Cyclone A Very Short Introduction Dan Grossman Cornell University - - PowerPoint PPT Presentation

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Cyclone A Very Short Introduction Dan Grossman Cornell University - - PowerPoint PPT Presentation

Jul 07, 2023 9 likes •81 views

Cyclone A Very Short Introduction Dan Grossman Cornell University Computer Science Cyclone Very Short Introduction, June 2001 Cyclone in One Slide A safe, convenient, and modern language/compiler at the C level of abstraction Safe:

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SLIDE 1

Cyclone – Very Short Introduction, June 2001

Cyclone

A Very Short Introduction

Dan Grossman Cornell University Computer Science

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Cyclone – Very Short Introduction, June 2001

Cyclone in One Slide

A safe, convenient, and modern language/compiler at the C level of abstraction

  • Safe: Memory safety, abstract types, no core dumps
  • C-level: User-controlled data representation, easy

inter-operability, resource-management control

  • Convenient: “looks like C, acts like C”, but may need

more type annotations

  • Modern: discriminated unions, pattern-matching,

exceptions, polymorphism, advanced type system, …

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Cyclone – Very Short Introduction, June 2001

Why Bother?

  • Safety-critical systems that must control

data representation

– e.g. low-level plug-ins

  • Performance tuning without throwing away

the prototype

  • Exploit massive infrastructure and

knowledge-base of C

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Cyclone – Very Short Introduction, June 2001

Silly Example

`a swap(`a @{2}`r x) { `a t = x[0]; x[0] = x[1]; x[1] = t; return x[0]; }

  • Compiler needs info to check safety of body and call sites
  • Call sites do not change !

void * swap(void **x) { void * t = x[0]; x[0] = x[1]; x[1] = t; return x[0]; }

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Cyclone – Very Short Introduction, June 2001

Status

  • Bootstrapped compiler (approx. 1 minute)
  • Libraries
  • Documentation (more in progress)
  • Easy to install and build (gcc, gnumake, a couple

environment variables)

  • URL announcement soon, meanwhile mail us:

– Greg Morrisett (jgm@cs.cornell.edu) – Trevor Jim (trevor@research.att.com) – Dan Grossman (danieljg@cs.cornell.edu)

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Cyclone – Very Short Introduction, June 2001

Yeah, We Do That… (With Caveats)

pointer arithmetic, unions, varargs, nested structs, address of stack variables, function pointers, polymorphism, casts to supertypes, declaration w/o initialization, type inference, array-bounds checks, extensible datatypes, namespace control, link- compatibility checking, … What do you want to see? (We’ll write code)