Thx @ Saúl
Your guess is right, I have resolved this issue by making write after
write_callback have been called in strictly seqquential.
On Friday, January 9, 2015 at 5:30:02 PM UTC+8, Saúl Ibarra Corretgé wrote:
>
> Hi,
>
> On 01/09/2015 05:38 AM, Ken Shin wrote:
> > Hi.
> > Can anybody figure out the possible reason why i caused the next error?
> >
>
> Any chance you are reusing the write request before the callback is
> called?
>
> Can you print the req structure?
>
> > The program crash at:
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > uv__write (stream=0x675898) at src/unix/stream.c:828
> > 828 size_t len = buf->len;
> >
> >
> > backtrace output:
> >
> > (gdb) bt
> > #0 uv__write (stream=0x675898) at src/unix/stream.c:828
> > #1 0x000000000042b6e6 in uv__stream_io (loop=<value optimized out>,
> > w=0x675920, events=<value optimized out>) at src/unix/stream.c:1229
> > #2 0x00000000004262e3 in uv__run_pending (loop=0x642a20,
> > mode=UV_RUN_DEFAULT) at src/unix/core.c:702
> > #3 uv_run (loop=0x642a20, mode=UV_RUN_DEFAULT) at src/unix/core.c:315
> > #4 0x000000000040a04b in server_run () at server.c:1273
> > #5 0x0000000000404245 in main (argc=1, argv=0x7fffffffe448) at
> nproxy.c:174
> >
> > (gdb) f 0
> > #0 uv__write (stream=0x675898) at src/unix/stream.c:828
> > 828 size_t len = buf->len;
> >
> > (gdb) p buf
> > $8 = (uv_buf_t *) 0x10
> > (gdb) p buf->len
> > Cannot access memory at address 0x18
> >
> > (gdb) p *stream
> > $10 = {data = 0x675880, loop = 0x642a20, type = UV_TCP, close_cb = 0,
> > handle_queue = {0x6759b0, 0x6664f0}, reserved = {0xe8c93a4155c08e2a,
> > 0x9e48a03bc96b2226, 0x286b377c4174719a, 0x30b8a716f31422af},
> > next_closing = 0x0, flags = 24932,
> > write_queue_size = 1380, alloc_cb = 0x4079ae <server_on_alloc_cb>,
> > read_cb = 0x409603 <server_on_read_done>, connect_req = 0x0,
> > shutdown_req = 0x0, io_watcher = {cb = 0x42b570 <uv__stream_io>,
> > pending_queue = {0x675928, 0x675928}, watcher_queue = {
> > 0x675938, 0x675938}, pevents = 5, events = 5, fd = 40},
> > write_queue = {0x675a80, 0x675a80}, write_completed_queue = {0x675968,
> > 0x675968}, connection_cb = 0, delayed_error = 0, accepted_fd = -1,
> > queued_fds = 0x0}
> >
> >
> > And the follow is part of my associated uv_write code:
> >
> > ```
> > uv_buf_t buf;
> >
> > buf.base = (char *)data;
> > buf.len = len;
> >
> > r = uv_write(&conn->write_req, (uv_stream_t *)&conn->handle, &buf, 1 ,
> > server_on_write_done);
> > ```
> >
> > Thanks
> >
> >
> > kenshin
> >
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>
> --
> Saúl Ibarra Corretgé
> bettercallsaghul.com
>
>
>
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