I would also add:
"arg0 != 0"
condition into "free" func declaration in D script. It is causing a lot
of false double free stack warnings.
E.g. boost libs like to call "free" with a zero arg a lot :)
Report with your original code:
Call statistics
Found 2383 malloc calls
Found 153 calloc calls
Found 0 realloc calls
Found 15499 free calls
Double free issues
Found 13066 double free stacks in total
Found 118 unique double free stacks
Report with free "arg0 != 0":
Call statistics
Found 1232 malloc calls
Found 79 calloc calls
Found 0 realloc calls
Found 2990 free calls
Double free issues
Found 1532 double free stacks in total
Found 51 unique double free stacks
There are still many FPs which I'm now investigating.
On 11/15/18 9:17 AM, Robert Ayrapetyan wrote:
Unfortunatelly I haven’t found one. Even reducing stack frame depth to
5 didn’t helped. I think it can be optimized in dtrace code by eg not
resolving names in real time and post process later instead.. This may
really help alot
On Mon, Nov 12, 2018 at 11:32 PM Petros Pissias <[email protected]
<mailto:[email protected]>> wrote:
Hi Robert,
Is there an alternative way to trace call stacks?
Using a large buffer (i.e. 1 GB) might also help not to slow down
the application too much.
On Mon, Nov 12, 2018 at 4:25 PM Robert
<[email protected] <mailto:[email protected]>>
wrote:
Unfortunately, ustack(50) you're using slows down execution
order of magnitude times.
I was in a situation when whole mem leak situation didn't
reproduced because of that.
On 11/12/18 7:18 AM, Petros Pissias wrote:
Hi everyone,
I wanted to share a little tool I have created for supporting
memory leak investigations with dtrace. It has helped me in a
couple of difficult cases and I would like to share it with you.
https://github.com/ppissias/DTLeakAnalyzer
It follows from the excellent article from Brendan Gregg (
http://www.brendangregg.com/Solaris/memoryflamegraphs.html )
and implements some of the techniques with some of my own
heuristics for further pointing our suspect memory leaks.
I wanted to share it in case is is useful for someone else,
Petros
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