| commit | 1e90cb9d20d4fcdb5d1448853370e969035d8014 | [log] [tgz] |
|---|---|---|
| author | Sam Clegg <sbc@chromium.org> | Fri May 24 22:45:08 2019 +0000 |
| committer | Sam Clegg <sbc@chromium.org> | Fri May 24 22:45:08 2019 +0000 |
| tree | 09998d8da39fafb0295fd840efe99789bee1e26e | |
| parent | 174aa9aa0232f9ef25373bac8c6393d092c6a3a9 [diff] |
[WebAssembly] Relax signature checking for undefined functions that are not called directly When function signatures don't match and the undefined function is not called directly (i.e. only has its address taken) we don't issue a warning or create a runtime thunk for the undefined function. Instead in this case we simply use the defined version of the function. This is possible since checking signatures of dynamic calls happens at runtime so any invalid usage will still result in a runtime error. This is needed to allow C++ programs to link without generating warnings. Its not uncommon in C++ for vtables to be populated by function address whee the signature of the function is not known in the compilation unit. In this case clang declares the method as void(void) and relies on the vtable caller casting the data back to the correct signature. Fixes: https://bugs.llvm.org/show_bug.cgi?id=40412 Differential Revision: https://reviews.llvm.org/D62153 git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@361678 91177308-0d34-0410-b5e6-96231b3b80d8
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.