I think there is something wrong with the branch_stack:

e.g.

..... 29: 00000000004005a0 -> 00000000004005b0 0 cycles P 0
..... 30: 0000000000400888 -> 000000000040088c 0 cycles P 0
..... 31: 000000000040088c -> 0000000000400898 0 cycles P 0

from the objdump:

400884: 97ffff3f bl 400580 <__printf_chk@plt>
400888: 97ffff46 bl 4005a0 <rand@plt>
40088c: b8004660 str w0, [x19],#4
400890: eb14027f cmp x19, x20
400894: 54ffffa1 b.ne 400888 <sort_array+0x50>
400898: d285e280 mov x0, #0x2f14

looks like 400888 is not jumping to 40088c, but 4005a0 instead. and 40088c is not even a jump instruction.

Dehao

On Wed, May 17, 2017 at 7:39 AM, Sebastian Pop <sebpop@gmail.com> wrote:

On Wed, May 17, 2017 at 9:35 AM, Dehao Chen <dehao@google.com> wrote:
> On Wed, May 17, 2017 at 7:31 AM, Sebastian Pop <sebpop@gmail.com> wrote:
>> Could you please provide the full command line I should be using?
>> I tried the following with no meaningful output:
>>
>> # sample_merger -profile inj
>> # cat data.txt
>> 0
>> 0
>> 0
>
>
> You also need to have -binary point to the profiling binary.
>

Thanks! I used the following command:

# sample_merger -profile ./inj -binary ./sort_3k

The output is data.txt attached.