Hi folks
I have been seeing another issue with the display of the lldb prompt.
This time it's when I do "target create elf-file", then "gdb-remote
port-number". After the "gdb-remote" command I see the fact that my
process is stopped, e.g.
Process 1 stopped
on the screen. But no (lldb) prompt.
Some investigation revealed that what's *probably* happening is the main
thread after processing the "gdb-remote" returns to it's IOHandler,
which then prints (lldb). However, the inferior's state changes seem to
delivered to stdout via a different thread, basically one which sits in
Debugger::DefaultEventHandler. This subsequent output then, I think,
overwrites the previous (lldb) prompt.
Now in my (and presumably other people's) situation, this issue is
compounded by the speed of the TCP/IP connection to the gdbserver stub,
the "poll the hardware" nature of my stub, and the fact the hardware is
actually simulated - yes over a TCP/IP socket.
FWIW, I resolved this by a horrible (POSIX only) hack, of sleeping for
300ms at the bottom of the CommandInterpreter::HandleCommand function.
@@ -9,6 +9,8 @@
#include "lldb/lldb-python.h"
+#include <poll.h> // MG for prompt bugs
+
#include <string>
#include <vector>
#include <stdlib.h>
@@ -1916,6 +1918,9 @@
if (log)
log->Printf ("HandleCommand, command %s", (result.Succeeded() ?
"succeeded" : "did not succeed"));
+ // MG wait for remote connects etc. to complete
+ poll(0,0,300);
+
return result.Succeeded();
}
But this is horrid. Given this, and other prompt issues, I'm wondering
whether whether we need some brave soul, to redesign the current lldb IO
handling mechanisms.
Matt
Member of the CSR plc group of companies. CSR plc registered in England and
Wales, registered number 4187346, registered office Churchill House, Cambridge
Business Park, Cowley Road, Cambridge, CB4 0WZ, United Kingdom
More information can be found at www.csr.com. Keep up to date with CSR on our
technical blog, www.csr.com/blog, CSR people blog, www.csr.com/people, YouTube,
www.youtube.com/user/CSRplc, Facebook,
www.facebook.com/pages/CSR/191038434253534, or follow us on Twitter at
www.twitter.com/CSR_plc.
New for 2014, you can now access the wide range of products powered by aptX at
www.aptx.com.
_______________________________________________
lldb-dev mailing list
[email protected]
http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
