lclint-interest message 149

From kir@iitb.fhg.de Mon Sep 15 10:20:54 1997
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Date: Mon, 15 Sep 1997 08:03:19 +0200
From: Harald Kirsch 
Organization: IITB
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To: lclint-interest@larch.lcs.mit.edu, kir@iitb.fhg.de
Subject: How do I tell lclint that ...?
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Hi there,

I like the idea of lclint very much, but often it is really hard
to tell it what I mean. Does anybody know how to annotate the
following code so that lclint does not complain about a memory
leak in the line

  s1 = table[0].bobo(s1, s2);

Here comes the code:
----------------------------------------------------------------
#include 

typedef char *
(*Bobo)(/*@only@*/char *s1, /*@only@*/char *s2);

typedef struct s_Bla {
  int i;
  Bobo bobo;
} Bla;


extern char *bobo1(char *, char*);
extern char *bobo2(char *, char*);

/**********************************************************/
Bla table[] = {
  {1, bobo1},
  {2, bobo2}
};

int
main(int argc, char **argv)
{
  char *s1 = malloc(10);
  char *s2 = malloc(20);

  s1 = table[0].bobo(s1, s2);

  return 0;
}
--------------------------------------------------------------------


For reference, here come my ~/.lclintrc
--------------------------------------------------------

## show column position in errors?
-showcol

## length of output lines
-linelen 72

## most unannotated pointers are implicitly set to `only', in particular
##  o global storage
##  o return values
##  o structure fields
+allimponly

## character constants like 'a' can be used as int.
+charintliteral

## all macros not marked /*@notfunction@*/ must have a prototype
+allmacros

## I prefer to negate pointers, as in
##    x = malloc(..)
##    if( !x ) { ... }
#+ptrnegate          
-------------------------------------------------------


	Regards,
	Harald Kirsch

----------------///|/////////////\------------------------------------
Harald Kirsch   +----------------+ If you don't like make, have a look
kir@iitb.fhg.de | IITB Karlsruhe | at http://www.iitb.fhg.de/~kir/Bras