commit | 6c127652097928ee1707a7bd1d5247e9fe1b3a2b | [log] [tgz] |
---|---|---|
author | Derek Schuff <dschuff@chromium.org> | Thu Jan 25 09:48:38 2024 -0800 |
committer | Copybara-Service <copybara-worker@google.com> | Thu Jan 25 09:50:22 2024 -0800 |
tree | 1d49093ca34f11ab999ba535bf086444ebcb0e07 | |
parent | 0c5e93f9f6bddc6d810b4b66bbfe9fa957a83529 [diff] |
[Object][Wasm] Allow parsing of GC types in type and table sections (#79235) This change allows a WasmObjectFile to be created from a wasm file even if it uses typed funcrefs and GC types. It does not significantly change how lib/Object models its various internal types (e.g. WasmSignature, WasmElemSegment), so LLVM does not really "support" or understand such files, but it is sufficient to parse the type, global and element sections, discarding types that are not understood. This is useful for low-level binary tools such as nm and objcopy, which use only limited aspects of the binary (such as function definitions) or deal with sections as opaque blobs. This is done by allowing `WasmValType` to have a value of `OTHERREF` (representing any unmodeled reference type), and adding a field to `WasmSignature` indicating it's a placeholder for an unmodeled reference type (since there is a 1:1 correspondence between WasmSignature objects and types in the type section). Then the object file parsers for the type and element sections are expanded to parse encoded reference types and discard any unmodeled fields. GitOrigin-RevId: 7f409cd82b322038f08a984a07377758e76b0e4c
This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.
lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.
In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.
It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz
The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f
.