Subj : Re: Doing something wrong creating strings for JS function calls
To   : Brook Monroe
From : Brendan Eich
Date : Tue Nov 23 2004 03:26 pm

Brook Monroe wrote:

> var.string    = va_arg(ap,char *);
> jStr        = JS_NewString(cx,var.string,strlen(var.string));
> params[i]    = STRING_TO_JSVAL(jStr);
> 
> The app crashes when I destruct the class instance, inside 
> js32.dll:js_PurgeDeflatedStringCache().  Clearly, the strings I'm 
> creating aren't done quite correctly...the arguments get where they need 
> to go, but get tidied up too soon.
> 
> How should I be going about this?

Use JS_NewStringCopyN if you don't mean to hand off malloc'ed character 
storage, which pretty clearly is owned by var in the example cited 
above, and *not* handed off to the JS engine's deflated string cache.

See also JS_NewStringCopyZ, JS_NewUCString, etc.

/be

.