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CHANGELOG.md

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0.7.8

  • Fix a bug with wasm32-wasi.
  • Updated some dependencies.

0.6.0

Released 2019-06-27.

  • Merge Wasm function and code entries into a single item in results. This means that output that used to look like:

    387 ┊     13.74% ┊ func[2]
378 ┊     13.42% ┊   ⤷ wee_alloc::alloc_with_refill::hb32c1bbce9ebda8e
226 ┊      8.02% ┊       ⤷ func[3]
225 ┊      7.99% ┊           ⤷ wee_alloc::alloc_first_fit::h9a72de3af77ef93f

    Will simply appear like this from now on:

    387 ┊     13.74% ┊ wee_alloc::alloc_with_refill::hb32c1bbce9ebda8e
226 ┊      8.02% ┊   ⤷ wee_alloc::alloc_first_fit::h9a72de3af77ef93f

    Why merge them into a single item? They are physically split at the binary level to allow parallel type checking of individual functions, since the checker knows all function's types by the time it has their code bodies. But despite being split, there is always a one-to-one relationship between function entries and code entries. They are logically part of the "same" thing, and there is no deduplication or sharing going on here that makes it so it makes sense for Twiggy to talk about them separately. Finally, merging them together means that results are presented in a more readable and more compact way. Win-win!

0.5.0

Released 2019-05-15.

  • Switched from using the parity-wasm crate to the wasmparser crate for parsing WebAssembly binaries. The wasmparser crate is lower-level and (crucially) exposes byte offsets for the things it parses. Ultimately, this enables Twiggy to account for a much higher percentage (near 100% now) of where the Wasm binary's size is coming from.

  • Added a summary of unreachable items to the dominator tree output. These are the items that are not children anywhere in the dominator tree.

  • Properly detects Wasm binaries when the extension is not .wasm by using the Wasm magic header.

0.4.0

Released 2019-02-02.

  • Add the ability to explicitly opt into using the experimental DWARF support.

  • Summarize and hide potential false-positive garbage items.

  • Fix a bug where non-C++ symbols were being demangled as C++ symbols incorrectly.

0.3.0

Released 2018/10/03.

  • Twiggy has a users guide now! #170

  • Added experimental, work-in-progress support for ELF and Mach-O binaries when they have DWARF debug info. #74

  • All subcommands default to displaying a maximum of 10 items at a time now. Additionally, they show a summary of the size and count of all the items that are not displayed. #94 #98 #103 #113

  • Added the -a/--all flag to twiggy garbage to display all garbage items without any max limit. #118

  • Added the -a/--all, --all-generics, and --all-monos flags to twiggy monos to list all generic functions, all monomorphizations of generic functions, and all of both generics and their monomorphizations. #120

  • Added support for using regexes to find the difference in particular function sizes with twiggy diff --regex. #129

  • Fixed a bug where wasm table elements referencing imported functions would cause integer underflow. #151

  • Consider wasm tables roots in the graph, and make edges table -> element, rather than element -> table. The latter is because a table logically owns its elements, not the other way around. The former is because dynamic virtual calls are not statically analyzable, so we have to consider all virtual functions (aka function table elements) as psuedo-roots in the graph. These two changes allow us to see when the table is heavy in the dominator tree because a bunch of dynamic indirect calls that may or may not be possible at run time are entrained in the function table because the compiler/linker couldn't statically prove that they won't happen. #153

0.2.0

Released 2018/06/25.

  • Added @data-pup to the Twiggy team! \o/

  • Added the twiggy diff subcommand to compare two versions of the same binary. #49 #12

  • Added the twiggy garbage subcommand to list code and data that is not transitively referenced by any exports / public functions. #48 #50

  • Added the ability to emit results as CSV. Pass the --format csv flags. #44

  • twiggy paths will now default to printing the paths to all items if no specific item is given as an argument. #57 #63

  • Added a --regex option to twiggy paths and twiggy dominators. This allows you to filter items by regexp, for example to only list items matching std::.*. #58 #65 [#59][] #68

0.1.0

Released 2018/05/03.

  • Initial release!