llvm-project/lld
Nico Weber f1969b74a7 [lld/mac] Fix nondeterminism in output section ordering
The two different thread_local_regular sections (__thread_data and
more_thread_data) had nondeterminstic ordering for two reasons:

1. https://reviews.llvm.org/D102972 changed concatOutputSections
   from MapVector to DenseMap, so when we iterate it to make
   output segments, we would add the two sections to the __DATA
   output segment in nondeterministic order.

2. The same change also moved the two stable_sort()s for segments
   and sections to sort(). Since sections with assigned priority
   (such as TLV data) have the same priority for all sections,
   this is incorrect -- we must use stable_sort() so that the
   initial (input-order-based) order remains.

As a side effect, we now (deterministically) put the __common
section in front of __bss (while previously we happened to
put it after it). (__common and __bss are both zerofill so
both have order INT_MAX, but common symbols are added to
inputSections before normal sections are collected.)

Makes lld/test/MachO/tlv.s and lld/test/MachO/tlv-dylib.s pass with
LLVM_ENABLE_EXPENSIVE_CHECKS=ON.

Differential Revision: https://reviews.llvm.org/D105054
2021-06-28 18:41:33 -04:00
..
COFF [LLD] [COFF] Fix handling of LTO comdats with nontrivial selection types after 728cc0075e 2021-06-25 09:39:56 +03:00
Common [lld] Rename StringRef _lower() method calls to _insensitive() 2021-06-25 00:22:01 +03:00
ELF [ELF] --sysroot: change sysrooted script to not fall back for an absolute path 2021-06-25 12:52:39 -07:00
MachO [lld/mac] Fix nondeterminism in output section ordering 2021-06-28 18:41:33 -04:00
MinGW [OptTable] Rename PrintHelp to printHelp 2021-06-24 14:47:03 -07:00
cmake/modules [cmake] Add support for multiple distributions 2021-05-12 11:13:18 -07:00
docs [lld][WebAssembly] Add new `--import-undefined` option 2021-06-17 11:44:21 -07:00
include/lld [WebAssembly] Rename event to tag 2021-06-17 20:34:19 -07:00
lib [OptTable] Rename PrintHelp to printHelp 2021-06-24 14:47:03 -07:00
test [lld/mac] Fix nondeterminism in output section ordering 2021-06-28 18:41:33 -04:00
tools/lld [lld] Rename StringRef _lower() method calls to _insensitive() 2021-06-25 00:22:01 +03:00
unittests Use INTERFACE_COMPILE_OPTIONS to disable -Wsuggest-override for any target that links to gtest 2020-07-27 08:37:01 -07:00
utils
wasm [OptTable] Rename PrintHelp to printHelp 2021-06-24 14:47:03 -07:00
.clang-format
.clang-tidy NFC: .clang-tidy: Inherit configs from parents to improve maintainability 2021-06-08 08:25:59 -07:00
.gitignore
CMakeLists.txt Fix lld macho standalone build by including llvm/Config/llvm-config.h instead of llvm/Config/config.h 2021-05-19 11:15:07 -04:00
CODE_OWNERS.TXT Add code owners of new MachO port 2020-09-02 19:32:12 -07:00
LICENSE.TXT
README.md [doc] Place sha256 in lld/README.md into backticks 2021-01-12 10:19:40 -08:00

README.md

LLVM Linker (lld)

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.

Benchmarking

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.