On 4/29/2012 9:51 AM, John Morris wrote: > With the attached patch, I can now use gdb to get through to the fork of > rtapi_app and watch it segfault. >
Very nice!
In the "I'd rather be lucky than good" category, I may have found a fix
although I don't know *WHY* it works. Perhaps your gdb prowess will
shed some light on this.
I got tired of stepping past a bunch of rtapi_print* calls with the
level set to RTAPI_MSG_DEBUG and not seeing any console output even
though I'm calling halcmd with the -V option. So, instead of trying to
figure out how to actually get messages to print, I just hacked the
default_rtapi_msg_handler routine to just dump everything to stdout,
regardless of the message level (minor patch below).
The AMAZING thing is I can now "sudo scripts/latency-test" and IT WORKS!!!
So...any idea why switching some debugging prints from stderr to stdout
might fix things? Is stderr even properly defined anywhere (normally I
expect the stderr output to show up on-screen, but it hasn't been and I
have not yet tried tracking down where it's actually going).
Patch attached. If the list eats it, just comment out lines 171, 173,
and 174 in /src/rtapi/linux_common.h (patch reproduced below, but
probably with line wrapping issues):
diff --git a/src/rtapi/linux_common.h b/src/rtapi/linux_common.h
index 12fe04c..b8e04e6 100644
--- a/src/rtapi/linux_common.h
+++ b/src/rtapi/linux_common.h
@@ -168,10 +168,10 @@ int rtapi_shmem_delete(int handle, int module_id)
void default_rtapi_msg_handler(msg_level_t level, const char *fmt,
va_list ap)
{
- if (level == RTAPI_MSG_ALL)
+// if (level == RTAPI_MSG_ALL)
vfprintf(stdout, fmt, ap);
- else
- vfprintf(stderr, fmt, ap);
+// else
+// vfprintf(stderr, fmt, ap);
}
static rtapi_msg_handler_t rtapi_msg_handler = default_rtapi_msg_handler;
--
Charles Steinkuehler
char...@steinkuehler.net
diff --git a/src/rtapi/linux_common.h b/src/rtapi/linux_common.h
index 12fe04c..b8e04e6 100644
--- a/src/rtapi/linux_common.h
+++ b/src/rtapi/linux_common.h
@@ -168,10 +168,10 @@ int rtapi_shmem_delete(int handle, int module_id)
void default_rtapi_msg_handler(msg_level_t level, const char *fmt, va_list ap)
{
- if (level == RTAPI_MSG_ALL)
+// if (level == RTAPI_MSG_ALL)
vfprintf(stdout, fmt, ap);
- else
- vfprintf(stderr, fmt, ap);
+// else
+// vfprintf(stderr, fmt, ap);
}
static rtapi_msg_handler_t rtapi_msg_handler = default_rtapi_msg_handler;
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