Commit Graph

20 Commits

Author SHA1 Message Date
Amy Huang
5a58b19f9c [LLD] Remove global state in lld/COFF
Remove globals from the lldCOFF library, by moving globals into a context class.
This patch mostly moves the config object into COFFLinkerContext.

See https://lists.llvm.org/pipermail/llvm-dev/2021-June/151184.html for
context about removing globals from LLD.

Reviewed By: aganea

Differential Revision: https://reviews.llvm.org/D110450
2023-01-09 23:39:30 -05:00
Martin Storsjö
398c2ad6f6 Revert "[LLD] Remove global state in lld/COFF"
This reverts commit 7370ff624d.
(and 47fb8ae2f9).

This commit broke the symbol type in import libraries generated
for mingw autoexported symbols, when the source files were built
with LTO. I'll commit a testcase that showcases this issue after
the revert.
2023-01-09 16:04:44 +02:00
Amy Huang
7370ff624d [LLD] Remove global state in lld/COFF
Remove globals from the lldCOFF library, by moving globals into a context class.
This patch mostly moves the config object into COFFLinkerContext.

See https://lists.llvm.org/pipermail/llvm-dev/2021-June/151184.html for
context about removing globals from LLD.

Reviewed By: aganea

Differential Revision: https://reviews.llvm.org/D110450
2023-01-08 18:43:13 -05:00
Martin Storsjö
5d513ef6cf [LLD] [COFF] Add support for a new, mingw specific embedded directive -exclude-symbols:
This is an entirely new embedded directive - extending the GNU ld
command line option --exclude-symbols to be usable in embedded
directives too.

(GNU ld.bfd also got support for the same new directive, currently in
the latest git version, after the 2.39 branch.)

This works as an inverse to the regular embedded dllexport directives,
for cases when autoexport of all eligible symbols is performed.

Differential Revision: https://reviews.llvm.org/D130120
2022-08-11 11:59:48 +03:00
Martin Storsjö
d1da6469f9 [LLD] [MinGW] Implement the --exclude-symbols option
This adds support for the existing GNU ld command line option, which
allows excluding individual symbols from autoexport (when linking a
DLL and no symbols are marked explicitly as dllexported).

Differential Revision: https://reviews.llvm.org/D130118
2022-08-11 11:59:47 +03:00
Nico Weber
7c26641d9d [lld/win] Use C++17 nested namespace syntax in most places
Like D131354, but for COFF.

No behavior change.

Differential Revision: https://reviews.llvm.org/D131405
2022-08-08 11:48:12 -04:00
Amy Huang
6f7483b1ec Reland "[LLD] Remove global state in lld/COFF" after fixing asan and msan test failures
Original commit description:

  [LLD] Remove global state in lld/COFF

  This patch removes globals from the lldCOFF library, by moving globals
  into a context class (COFFLinkingContext) and passing it around wherever
  it's needed.

  See https://lists.llvm.org/pipermail/llvm-dev/2021-June/151184.html for
  context about removing globals from LLD.

  I also haven't moved the `driver` or `config` variables yet.

  Differential Revision: https://reviews.llvm.org/D109634

This reverts commit a2fd05ada9.

Original commits were b4fa71eed3
and e03c7e367a.
2021-09-17 17:18:42 -07:00
Amy Huang
a2fd05ada9 Temporarily revert "[LLD] Remove global state in lld/COFF" and "[lld] Add test to
check for timer output"

Seems to be causing a number of asan test failures.

This reverts commit b4fa71eed3
and e03c7e367a.
2021-09-16 11:58:11 -07:00
Amy Huang
b4fa71eed3 [LLD] Remove global state in lld/COFF
This patch removes globals from the lldCOFF library, by moving globals
into a context class (COFFLinkingContext) and passing it around wherever
it's needed.

See https://lists.llvm.org/pipermail/llvm-dev/2021-June/151184.html for
context about removing globals from LLD.

I also haven't moved the `driver` or `config` variables yet.

Differential Revision: https://reviews.llvm.org/D109634
2021-09-16 11:00:23 -07:00
Martin Storsjö
3785a413fe Reapply [LLD] [COFF] Implement a GNU/ELF like -wrap option
Add a simple forwarding option in the MinGW frontend, and implement
the private -wrap option in the COFF linker.

The feature in lld-link isn't gated by the -lldmingw option, but
the option is left as a private, undocumented option primarily
used by the MinGW driver.

The implementation is significantly based on the support for --wrap
in the ELF linker, but many small nuance details are different
between the ELF and COFF linkers, ending up with more than a few
implementation differences.

This fixes https://bugs.llvm.org/show_bug.cgi?id=47384.

Differential Revision: https://reviews.llvm.org/D89004

Reapplied with the bitfield member canInline fixed so it doesn't break
builds targeting windows.
2020-10-15 22:14:02 +03:00
Arthur Eubanks
3d338f6813 Revert "[LLD] [COFF] Implement a GNU/ELF like -wrap option"
This reverts commit a012c704b5.

Breaks Windows builds.

C:\src\llvm-mint\lld\COFF\Symbols.cpp(26,1): error: static_assert failed due to requirement 'sizeof(lld::coff::SymbolUnion) <= 48' "symbols should be optimized for memory usage"
static_assert(sizeof(SymbolUnion) <= 48,
2020-10-15 10:27:25 -07:00
Martin Storsjö
a012c704b5 [LLD] [COFF] Implement a GNU/ELF like -wrap option
Add a simple forwarding option in the MinGW frontend, and implement
the private -wrap option in the COFF linker.

The feature in lld-link isn't gated by the -lldmingw option, but
the option is left as a private, undocumented option primarily
used by the MinGW driver.

The implementation is significantly based on the support for --wrap
in the ELF linker, but many small nuance details are different
between the ELF and COFF linkers, ending up with more than a few
implementation differences.

This fixes https://bugs.llvm.org/show_bug.cgi?id=47384.

Differential Revision: https://reviews.llvm.org/D89004
2020-10-15 18:34:02 +03:00
Reid Kleckner
f24c3352c9 [COFF] Don't include llvm/LTO/LTO.h in a header
LLVM's LTO header includes all of llvm/IR, which most of the COFF linker
doesn't need.
2019-11-14 13:47:18 -08:00
Rui Ueyama
136d27ab4d [Coding style change][lld] Rename variables for non-ELF ports
This patch does the same thing as r365595 to other subdirectories,
which completes the naming style change for the entire lld directory.

With this, the naming style conversion is complete for lld.

Differential Revision: https://reviews.llvm.org/D64473

llvm-svn: 365730
2019-07-11 05:40:30 +00:00
Rui Ueyama
659f2752a0 Move MinGW-specific code out of LinkerDriver::link. NFC.
LinkerDriver::link is getting too long, it's time to simplify it.

Differential Revision: https://reviews.llvm.org/D58395

llvm-svn: 354391
2019-02-19 22:06:44 +00:00
Chandler Carruth
2946cd7010 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00
Martin Storsjo
32e651e169 [COFF] Don't do autoexport of symbols from GNU import libraries
This involves adding more generic list of symbol suffixes/prefixes
to ignore for autoexport; adding a few other entries to these lists
as well from the corresponding lists in binutils.

Differential Revision: https://reviews.llvm.org/D52382

llvm-svn: 343070
2018-09-26 06:13:47 +00:00
Martin Storsjo
a47957ab13 [COFF] Allow exporting all symbols from system libraries specfied with -wholearchive:
When building a shared libc++.dll, it pulls in libc++abi.a statically
with the --wholearchive flag. If such a build is done with
--export-all-symbols, it's reasonable to assume that everything
from that library also should be exported with the same rules as normal
local object files, even though we normally avoid autoexporting things
from libc++abi.a in other cases when linking a DLL (user code).

Differential Revision: https://reviews.llvm.org/D51529

llvm-svn: 341403
2018-09-04 20:56:56 +00:00
Martin Storsjo
3af5ffb538 [COFF] Avoid forward declaring StringSet, fix build
This should fix the build after SVN r316178, which worked fine
on GCC 5.4, but failed on clang with errors like these:

MinGW.h:26:3: error: too few template arguments for class template 'StringSet'
  StringSet<> ExcludeSymbols;
  ^
lld/Common/LLVM.h:28:30: note: template is declared here
  template<typename T> class StringSet;

Don't forward declare and add the using directive in the main
lld/Common/LLVM.h header, but just qualify the class name
in MinGW.h instead.

llvm-svn: 316180
2017-10-19 20:19:16 +00:00
Martin Storsjo
e1f894d59e [COFF] Move MinGW specific functions/classes to a separate file. NFC.
Differential Revision: https://reviews.llvm.org/D39067

llvm-svn: 316178
2017-10-19 19:49:38 +00:00