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Bug #473
closedCan't trace long double payload field?
Start date:
03/12/2013
Due date:
% Done:
100%
Estimated time:
Description
Once more using lttng-ust/doc/examples/easy-ust/, I have:
sample.c
[...]
#include <unistd.h>
#include <complex.h> //for _Complex types
#define TRACEPOINT_DEFINE
#include "sample_component_provider.h"
int main(int argc, char **argv)
{
int i = 0;
for (i = 0; i < 2000; i++) {
tracepoint(sample_component, message, "Hello World", 1.E+2f, 1.E+3, 1.E+4L);
usleep(10);
}
return 0;
}
sample_component_provider.h
[...]
TRACEPOINT_EVENT(
sample_component,
message,
TP_ARGS(char *, text, float, floatvalue, double, doublevalue, long double, longdoublevalue),
TP_FIELDS(
ctf_string(message, text)
ctf_float(float, floatfield, floatvalue)
ctf_float(double, doublefield, doublevalue)
ctf_float(long double, longdoublefield, longdoublevalue)
)
)
[...]
Now I try to create a trace:
$ lttng create mylocalsession Session mylocalsession created. Traces will be written in /home/daniel/lttng-traces/mylocalsession-20130312-121313 $ lttng enable-event -u --all All UST events are enabled in channel channel0 $ lttng start Tracing started for session mylocalsession $ lttng destroy Session mylocalsession destroyed
Between lttng start and lttng destroy I run ./sample from another console.
I get no error messages whatsovever, but the resulting trace has what seems like a correct metadata file...but an empty channel0_0 file (probably not truly empty, just closed incorrectly).
The same exercise, omitting the long double value, works fine.
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