[Bug gdb/24069] gdb on OSX Mojave hangs in darwin_decode_message

["levraiphilippeblain at gmail dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=24069

Philippe Blain <levraiphilippeblain at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |levraiphilippeblain at gmail dot c
                   |                            |om

--- Comment #6 from Philippe Blain <levraiphilippeblain at gmail dot com> ---
I tried building 8.3.1 on macOS 10.15.5 (latest Catalina), and about half of
the time GDB hangs just as kemlath and timothee cour describe. I also attached
LLDB and GDB is indeed stuck in `darwin_decode_message`.

If I recompile with the change that kemlath suggests,

diff --git a/gdb/darwin-nat.c b/gdb/darwin-nat.c
index 8c34aa8a3f..d30374b673 100644
--- a/gdb/darwin-nat.c
+++ b/gdb/darwin-nat.c
@@ -1151,7 +1151,7 @@ darwin_decode_message (mach_msg_header_t *hdr,
                              res, wstatus);

              /* Looks necessary on Leopard and harmless...  */
-             wait4 (inf->pid, &wstatus, 0, NULL);
+             wait4 (inf->pid, &wstatus, WNOHANG, NULL);

              inferior_ptid = ptid_t (inf->pid, 0, 0);
              return inferior_ptid;

then a little more than half the time I get 

"During startup program terminated with signal ?, Unknown signal"

and the rest of the time it works fine. I'll try with 9.1 and 9.2.

-- 
You are receiving this mail because:
You are on the CC list for the bug.