memory leak in KJS
staikos at kde.org
Sat Jan 29 04:39:39 GMT 2005
On Friday 28 January 2005 21:19, Harri Porten wrote:
> On Fri, 28 Jan 2005, [utf-8] AndrÃ© WÃ¶bbeking wrote:
> > x bytes in y blocks are definitely lost
> > operator new(unsigned) (vg_replace_malloc.c:133)
> > kjsyyparse() (grammar.y:172)
> > KJS::Parser::parse(KJS::UChar const*, unsigned, KJS::SourceCode**, int*,
> > KJS::UString*) (internal.cpp:485)
> There's one known leak in the parser that occurs when the parser hits a
> syntax error. In that case the bison generated will unwind and leave the
> memory allocated for string tokens without an owner. Last time I tried to
> solve it I realized how difficult it is to do with bison. Having a pool of
> strings allocated during parsing (that could be freed in the end if they
> are unused might be a possibility).
I had this problem in Kst also. I solved it by adding a ridiculous number
of error paths into the syntax and cleaning up recursively in those cases.
It's unfortunately messy, and for the few bytes it consumes, I guess it's
probably not worth the effort in most cases.
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