[lttng-dev] Need Help In trace generation for malloc(), free() calls etc

[Abhinav Ranjan]

Hello Sir,
I am Abhinav from India.
Actually I am very new to the Embedded System Engineering profession. In
fact I have been asked to do an independent project to instrumenting a c
application using  LLTng concept to find/trace calls to malloc(), free()
calls.

1. I followed the steps provided to create executable using -lltng-ust -ldl
2.I executed it as: LD_PRELOAD=liblttng-ust-libc-wrapper.so ./executable
3. Then I followed commands create , capture the events. and destroyed it.
4. I used TraceCompass to analyze the trace but it won't show any calls to
malloc or free.

Please help i want to trace the malloc(),free() calls in the application.
Corresponding to above steps I am inserting images as below:
[image: 1malloc_app.PNG]
[image: 2malloc_tp.PNG]
[image: 3malloc-tp_header.PNG]
[image: 4.exectable.PNG]
[image: 5.trace_creation.PNG]

But trace was not showing the malloc call and free call event then
alternatively i did the following:

[image: 6.alternativeto5.PNG]
[image: 7.creation_trace.PNG]
[image: 8.tracecompass.PNG]

Thanking You!

Regards,
Abhinav
9482866639
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