Output is not display the name of the function

[d3monviking]

Upon compiling and running uftrace locally, all the commands are displaying function's pointers (I guess), instead of their name. Here is a screenshot of the output I got on running the sample hello world file from the tutorial.

Upon running the -A and -R options for displaying the argument and the return value of the functions, the output isn't running as intended.

[namhyung]

I've checked your data and found something strange. The task.txt file shows this:

$ cat uftrace.data/task.txt 
SESS timestamp=4803.710931385 pid=116519 sid=361ba6f00622caf5 exename="/home/priyanshu/Desktop/uftrace practice/foobar"
TASK timestamp=4803.711096219 tid=116519 pid=116519
TASK timestamp=4803.711404436 tid=116522 pid=116519

I'm curious why the exename looks like that. It's supposed to have the path of the target binary only like below.

SESS timestamp=329054.713035896 pid=4025051 sid=5ca4a0a2dc928d11 exename="/usr/bin/pwd"
TASK timestamp=329054.713139792 tid=4025051 pid=4025051

[d3monviking]

I am not sure why that happened. I tried to recreate this issue by deleting everything except the hello.c and compiled it with gcc -o hello -pg hello.c. After that I called uftrace hello and got this

I entered the record option with uftrace record pwd but I got the compiler error

ERROR: Can't find 'mcount' symbol in the '/bin/pwd'.
        It seems not to be compiled with -pg or -finstrument-functions flag
        which generates traceable code.  Please check your binary file. 

which wasn't the case in the previous attempt. Finally I recorded the trace data using --force option and here is what the task.txt file reads now:

SESS timestamp=8653.961016768 pid=53370 sid=e2c61a39838c1600 exename="/usr/bin/pwd"
TASK timestamp=8653.961142838 tid=53370 pid=53370

[namhyung]

Ok, can you show me the task.txt file after running uftrace record hello then?

[d3monviking]

It just contains two lines of information (which was expected previously)

SESS timestamp=8653.961016768 pid=53370 sid=e2c61a39838c1600 exename="/usr/bin/pwd"
TASK timestamp=8653.961142838 tid=53370 pid=53370

[namhyung]

It's pwd not hello. But then I think it should show symbols in uftrace replay.

[d3monviking]

So I tried it again and upon running uftrace record hello, the task.txt file looked like this

SESS timestamp=1375.779041323 pid=6667 sid=63d766442d49887b exename="/home/priyanshu/Desktop/uftrace practice/hello"
TASK timestamp=1375.779242949 tid=6667 pid=6667

Here is a screenshot to the record and replay options

[namhyung]

It's strange that it has the exename including uftrace. I think it should be "/home/priyanshu/Desktop/practice/hello".

Is there anything special on your system or the binary?