Hi Saghul,
No, this is not a small and lib uv only test case. But the error is caused
only if we issue free() in uv_close or in uv_close_callback. Below is the
code of writer :
char *resp_msg;
resp_msg = (char*) malloc( 400 );
bzero( resp_msg, sizeof(resp_msg) );
strcpy( resp_msg, response );
uv_buf_t buf = uv_buf_init( resp_msg, sizeof(resp_msg));//part 2
buf.len = strlen(resp_msg);
buf.base = resp_msg;
uv_write_t *writer = (uv_write_t *) malloc(sizeof(uv_write_t));
writer->data = (void*) buf.base;
uv_write(writer, (uv_stream_t*) _client, &buf, 1, on_client_write);
On Friday, December 20, 2013 2:08:43 PM UTC+5:30, Saúl Ibarra Corretgé
wrote:
>
> On 12/20/2013 06:39 AM, Sarav Sandhu wrote:
> > Hi Ben/libuv team,
> >
> > While analysing the memory allocation with valgrind memory analyser
> > tool, I've observed the following error while calling free() in
> > uv_close's callback :
> >
> > ==32732==
> > ==32732== Invalid free() / delete / delete[]
> > ==32732== at 0x4004FDA: free (vg_replace_malloc.c:233)
> > ==32732== by 0x80521A3: uv__finish_close (core.c:204)
> > ==32732== by 0x80521DA: uv__run_closing_handles (core.c:218)
> > ==32732== by 0x8052457: uv_run (core.c:316)
> > ==32732== by 0x8050328: ppp (ppp.c:96)
> > ==32732== by 0x804AD79: main (main.c:108)
> > ==32732== Address 0x806B880 is not stack'd, malloc'd or (recently)
> free'd
> > ==32732==
> >
> > The code for the same is :
> >
> > void on_file_write(uv_write_t *req, int status) {
> > uv_close( (uv_handle_t*) req->handle, (uv_close_cb) free );
> > free( req->data );
> > }
> >
> > uv_write(writer, (uv_stream_t*) &req_file, &buf, 1, on_file_write);
>
> How are you allocating writer here?
>
> Also, do you have a small and libuv-only test case exposing the issue?
>
>
> Thanks,
>
> --
> Sa�l Ibarra Corretg�
> bettercallsaghul.com
>
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