Motivation:
We often debug allocations on macOS, so being able to parse the output
from malloc-aggregation.d is valuable.
Modifications:
- Add a dtrace parser to stackdiff
Result:
Can diff outputs from dtrace
Motivation:
Our alloc regression workflows are somewhat disparate: on macOS we have
dtrace and a script to diff two ouputs. On Linux we have heaptrack and
bpftrace but no way to analyze their outputs.
Diffing output from these tools can be quite tedious if the stacks vary
even a little (because the compiler decided to not inline a function,
for example).
Most of the tedium in this workflow is from pairing up equivalent stacks
across the two inputs. We can make this easier to do by ranking
suggestions based on how similar they are and letting the user decide
whether to accept the match or not.
Modifications:
- Add a subpackage with some internals for parsing heaptrack,
aggregating stacks, and measuring the similarity between them
- The CLI took is currently a no-op, it'll be added in subsequent PRs
Result:
Easier to diagnose alloc regressions
Cory Benfield
George Barnett