Hi all, I have written a new stack-fixing tool, called `fix-stacks`, which symbolizes stack traces produced by Firefox.
`fix-stacks` is intended to replace our existing stack-fixing scripts, `fix_{linux,macosx}_stack.py` and `fix_stack_using_bpsyms.py`, which are used (a) on many test outputs, both locally and on automation, and (b) by DMD, Firefox's built-in heap profiler. `fix-stacks` is now installed by `mach bootstrap` on Windows, Mac, and Linux. It is usable from Python code via the `fix_stacks.py` wrapper script. Its code is at https://github.com/mozilla/fix-stacks/. In bug 1604095 I replaced the use of `fix_{linux,macosx}_stack.py` with `fix_stacks.py` for DMD, with the following benefits. * On Linux, stack-fixing of DMD output files (which occurs when you run `dmd.py`) is roughly 100x faster. On my Linux box I saw reductions from 20-something minutes to ~13 seconds. * On Mac, stack-fixing of DMD output files on Mac is roughly 10x faster. On my Mac laptop I saw reductions from ~7 minutes to ~45 seconds. * On Windows, stack-fixing of DMD output files now occurs. (It previously did not because there is no `fix_window_stacks.py` script.) This means that DMD is now realistically usable on Windows without jumping through hoops to use breakpad symbols. There is more work to be done. Soon, I plan to: * use `fix-stacks` on test outputs (in `utils.py` and `automation.py.in`); * re-enable stack fixing on Mac test runs on local builds, which is currently disabled because it is so slow; * add breakpad symbol support to `fix-stacks`; * remove the old scripts. The tree of relevant bugs can be seen at https://bugzilla.mozilla.org/showdependencytree.cgi?id=1596292&hide_resolved=1 . The stack traces produced by `fix-stacks` are sometimes different to those produced by the old stack-fixers. In my experience these differences are minor and you won't notice them if you aren't looking for them. But let me know if you have any problems. Nick _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform