Commit Graph

835 Commits

Author SHA1 Message Date
Zachary Turner 5634ccf476 lld Fixups for TypeDatabase changes.
llvm-svn: 302304
2017-05-05 22:06:06 +00:00
Rafael Espindola a0f30da62e Revert "Fix misnamed #include. Remove _NC suffix from ELF relocations TLSDESC_{LD64,ADD}_LO12"
This reverts commit r301964. It broke the build.

llvm-svn: 301969
2017-05-02 20:19:42 +00:00
Joel Jones f387eb62b9 Fix misnamed #include. Remove _NC suffix from ELF relocations TLSDESC_{LD64,ADD}_LO12
llvm-svn: 301964
2017-05-02 19:31:40 +00:00
Zachary Turner e204a6c9a3 Rename pdb::StringTable -> pdb::PDBStringTable.
With the forthcoming codeview::StringTable which a pdb::StringTable
would hold an instance of as one member, this ambiguity becomes
confusing.  Rename to PDBStringTable to avoid this.

llvm-svn: 301948
2017-05-02 18:00:13 +00:00
Rui Ueyama 3781137909 Fix comments.
llvm-svn: 301778
2017-04-30 20:58:20 +00:00
Rui Ueyama 3969acf8a4 Port recent changes to ELF/MapFile.cpp to COFF.
llvm-svn: 301754
2017-04-29 18:50:39 +00:00
Hans Wennborg ca31b9f89c Flush output in log()
This change was motivated by output from lld-link.exe and link.exe
getting intermixed. There's already a flush() call in message(), so
there's precedence.

llvm-svn: 301693
2017-04-28 21:35:02 +00:00
Saleem Abdulrasool 5c98b74536 COFF: actually synthesize CONST imports properly
CONSTANT imports expect both the `_imp_` prefixed and non-prefixed
symbols should be added to the symbol table.  This allows for linking
symbols like _NSConcreteGlobalBlock in WinObjC.  The previous change
would generate the import library properly by handling the option but
would not consume the generated entry properly.

llvm-svn: 301657
2017-04-28 17:06:40 +00:00
Rui Ueyama a85572ebf0 COFF ICF: Merge only functions. Do not merge read-only data.
This seems to be the behavior of the MSVC linker. Previously, this
incompatibility caused nasty issues in chromium build a few times.

Differential Revision: https://reviews.llvm.org/D30363

llvm-svn: 301598
2017-04-27 23:03:22 +00:00
Rui Ueyama 0417172387 Fix comments again.
I thought I fixed the page size, but there were still errors.
This patch also contains fixes for grammatical errors.
Thanks pcc for proofreading!

llvm-svn: 301454
2017-04-26 20:20:05 +00:00
Rui Ueyama 6cef17ce04 Fix comment.
llvm-svn: 301450
2017-04-26 19:50:49 +00:00
Rui Ueyama 1a7f6afe7d Add comments about Widnows .reloc section.
llvm-svn: 301287
2017-04-25 03:31:10 +00:00
Rui Ueyama 95fe854332 Handle _LINK_ env string as command line parameters.
"_LINK_" environment varaible should be appended to the command line.
https://msdn.microsoft.com/en-us/library/6y6t9esh.aspx

Fixes https://bugs.llvm.org/show_bug.cgi?id=32756

llvm-svn: 301264
2017-04-24 22:20:03 +00:00
Bob Haarman 4110816253 [coff] for /msvclto, pass archive members with prevailing symbols first
Summary: When using /msvclto, lld and MSVC's linker both do their own symbol resolution. This can cause them to select different archive members, which can result in undefined references. This change avoids that situation by extracting archive members that are selected by lld and passing those to link.exe before any archives, so that MSVC's uses those objects for symbol resolution instead of different archive members.

Reviewers: pcc, rnk, ruiu

Reviewed By: pcc

Subscribers: llvm-commits, mehdi_amini

Differential Revision: https://reviews.llvm.org/D32317

llvm-svn: 301045
2017-04-21 21:38:01 +00:00
Saleem Abdulrasool 72fbd346c6 COFF: add support for CONSTANT exports
The CONSTANT export type is marked as obsolete, but link still supports
this.  Furthermore, WinObjC uses this for certain exports.  Add support
for this export type.

llvm-svn: 301013
2017-04-21 18:05:46 +00:00
Peter Collingbourne dc07769c90 COFF: Remove some undefined declarations. NFC.
llvm-svn: 300910
2017-04-20 22:23:36 +00:00
Bob Haarman 630d0c0f44 [coff] use newlines instead of spaces as separators in msvclto response file
Summary:
Fixes PR32689: /msvclto creates response files with lines
that are too long for msvc's linker (LNK1170).

Reviewers: hans, rnk, ruiu

Subscribers: llvm-commits, mehdi_amini

Differential Revision: https://reviews.llvm.org/D32185

llvm-svn: 300612
2017-04-18 22:00:29 +00:00
Peter Collingbourne 8446f1fe6a Object, LTO: Add target triple to irsymtab and LTO API.
Start using it in LLD to avoid needing to read bitcode again just to get the
target triple, and in llvm-lto2 to avoid printing symbol table information
that is inappropriate for the target.

Differential Revision: https://reviews.llvm.org/D32038

llvm-svn: 300300
2017-04-14 02:55:06 +00:00
Peter Collingbourne aa68ca3d5f COFF: Remove some unused fields.
llvm-svn: 300298
2017-04-14 02:34:47 +00:00
Richard Smith a13714ea5f Update to match LLVM r300135.
llvm-svn: 300141
2017-04-12 23:51:20 +00:00
Bob Haarman dd4b4325ee [coff] default to multiple parallel ThinLTO jobs
Summary:
lld-link allows the number of parallel ThinLTO jobs to be specified
using /opt:lldltojobs=N. If left unspecified, the implementation
conservatively defaults to 1. This leads to very long link times. This
change makes it so that the default is to automatically set the
parallelism, as we do in the ELF linker.

Reviewers: ruiu, hans

Reviewed By: ruiu, hans

Subscribers: pcc, mehdi_amini, Prazek, llvm-commits

Differential Revision: https://reviews.llvm.org/D31986

llvm-svn: 300089
2017-04-12 18:36:13 +00:00
Saleem Abdulrasool 671029daec COFF: support the /appcontainer flag
The /appcontainer flag indicates that the module may only be used inside
an application container (for isolation).  This has been supported by
link.exe since Windows 8.0.  It sets an additional bit in the PE DLL
Characteristics flag to indicate the behavioural change.

llvm-svn: 299728
2017-04-06 23:07:53 +00:00
Bob Haarman ac8f7fc07b [COFF] support /ERRORLIMIT option
Summary:
This adds support for reporting multiple errors in a single invocation of lld-link. The limit defaults to 20 and can be changed with the /ERRORLIMIT command line parameter, or set to unlimited by passing a value of 0.

This is a new attempt after r295507, which was reverted because opening files raced with exiting early, causing the test to be flaky. This version avoids the race by exiting before calling enqueuePath.

Reviewers: pcc, ruiu

Reviewed By: ruiu

Subscribers: llvm-commits, dblaikie

Differential Revision: https://reviews.llvm.org/D31688

llvm-svn: 299496
2017-04-05 00:43:54 +00:00
Reid Kleckner 13fc411e39 [PDB] Save one type record copy
Summary:
The TypeTableBuilder provides stable storage for type records. We don't
need to copy all of the bytes into a flat vector before adding it to the
TpiStreamBuilder.

This makes addTypeRecord take an ArrayRef<uint8_t> and a hash code to go
with it, which seems like a simplification.

Reviewers: ruiu, zturner, inglorion

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D31634

llvm-svn: 299406
2017-04-04 00:56:34 +00:00
Peter Collingbourne 7b30f16c9f Re-apply r299168 and r299169 now that the libdeps are fixed.
llvm-svn: 299184
2017-03-31 04:47:07 +00:00
Peter Collingbourne f10698b940 Revert r299168 and r299169 due to library dependency issues.
http://bb.pgr.jp/builders/i686-mingw32-RA-on-linux/builds/25073/steps/build_llvmclang/logs/stdio

llvm-svn: 299171
2017-03-31 02:44:50 +00:00
Peter Collingbourne d9717aa0e4 LTO: Reduce memory consumption by creating an in-memory symbol table for InputFiles. NFCI.
Introduce symbol table data structures that can be potentially written to
disk, have the LTO library build those data structures using temporarily
constructed modules and redirect the LTO library implementation to go through
those data structures. This allows us to remove the LLVMContext and Modules
owned by InputFile.

With this change I measured a peak memory consumption decrease from 5.4GB to
2.8GB in a no-op incremental ThinLTO link of Chromium on Linux. The impact on
memory consumption is larger in COFF linkers where we are currently forced
to materialize all metadata in order to read linker options. Peak memory
consumption linking a large piece of Chromium for Windows with full LTO and
debug info decreases from >64GB (OOM) to 15GB.

Part of PR27551.

Differential Revision: https://reviews.llvm.org/D31364

llvm-svn: 299168
2017-03-31 02:28:30 +00:00
Rui Ueyama 9a3e73383b Add parsing of mllvm command line options.
Patch by Alberto Magni
Original patch by Kyungwoo Lee <kyulee@microsoft.com>

Differential Revision: https://reviews.llvm.org/D31388

llvm-svn: 299106
2017-03-30 20:10:40 +00:00
Peter Collingbourne 0d56b959ad LTO: Replace InputFile::Symbol::getFlags() with predicate accessors. NFC.
This makes the predicates independent of the flag representation
and makes the code a little easier to read.

llvm-svn: 298951
2017-03-28 22:31:35 +00:00
Bob Haarman 2d2b5b09e0 COFF: include archive name in LTO object name
Summary: In the ELF linker, we create the buffer identifier for bitcode files by appending the object name to the archive name. This change makes the COFF linker do the same. Without the change, ThinLTO builds can fail with an error message about multiple ThinLTO modules per object file, caused by object files contained in different archives having the same name.

Reviewers: pcc, ruiu

Reviewed By: pcc

Subscribers: mehdi_amini

Differential Revision: https://reviews.llvm.org/D31402

llvm-svn: 298942
2017-03-28 21:20:06 +00:00
Reid Kleckner 5d57752c81 [PDB] Split item and type records when merging type streams
Summary: MSVC does this when producing a PDB.

Reviewers: ruiu

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D31316

llvm-svn: 298717
2017-03-24 17:26:38 +00:00
Reid Kleckner 77d3aa476e Add a /nopdb flag to disable PDB generation
This will be used in the sanitizer test suite, which wants to use DWARF
line tables.

At some point we should reconsider how LLD handles the long section
names required by DWARF debug sections.

llvm-svn: 298544
2017-03-22 19:49:12 +00:00
Reid Kleckner 13bdbfb622 [COFF] Put the PDB next to the image if the user doesn't pass /PDB:
Summary: This is compatible with MSVC link.exe.

Reviewers: ruiu

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D31224

llvm-svn: 298467
2017-03-22 00:57:14 +00:00
Reid Kleckner 7668182e44 [COFF] Don't let /def override /out filename
Summary:
This also delays setting the output filename based on the first input
argument until after processing /def.

Fixes PR32354

Reviewers: ruiu, pcc

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D31152

llvm-svn: 298327
2017-03-21 00:12:51 +00:00
Zachary Turner 82a0c97b32 Add a function to MD5 a file's contents.
In doing so, clean up the MD5 interface a little.  Most
existing users only care about the lower 8 bytes of an MD5,
but for some users that care about the upper and lower,
there wasn't a good interface.  Furthermore, consumers
of the MD5 checksum were required to handle endianness
details on their own, so it seems reasonable to abstract
this into a nicer interface that just gives you the right
value.

Differential Revision: https://reviews.llvm.org/D31105

llvm-svn: 298322
2017-03-20 23:33:18 +00:00
Peter Collingbourne 8713bf69b6 COFF: Strip /lldsavetemps from MSVC command line during /msvclto.
llvm-svn: 298035
2017-03-17 02:11:09 +00:00
Peter Collingbourne db7447deed COFF: Do not create empty temporary archives for /msvclto.
The MSVC linker doesn't support them.

Differential Revision: https://reviews.llvm.org/D31067

llvm-svn: 298034
2017-03-17 02:04:22 +00:00
Peter Collingbourne a6ffbdd922 COFF: Fix use-after-free in /msvclto implementation.
The Archive object owns the memory buffers of any thin archive members, so we
need to make sure the object is still in scope when we access archive members.

Differential Revision: https://reviews.llvm.org/D31066

llvm-svn: 298033
2017-03-17 02:03:20 +00:00
Rui Ueyama e1bf1365d7 Do not pass archive files containing non-native object files.
The MSVC linker doesn't like archive files containing non-native object
files.

When we are doing an LTO build, we may create archive files containing
both LLVM bitcode files and native object files. For example, if a
project contains assembly files and C++ files, we create native object
files for the assembly files and LLVM bitcode files for the C++ files.

With the /msvclto option, LLD passes archive files to the MSVC linker.
Previously, we didn't pass archive files if they contain at least one
bitcode files. That wasn't correct because the native object files that
weren't passed to the MSVC linker may be needed to complete linking.

In this patch, we create new temporary archive files to strip bitcode
files.

Differential Revision: https://reviews.llvm.org/D31053

llvm-svn: 297997
2017-03-16 21:19:36 +00:00
Zachary Turner ea4e60754e [pdb] Write the module info and symbol record streams.
Previously we did not have support for writing detailed
module information for each module, as well as the symbol
records.  This patch adds support for this, and in doing
so enables the ability to construct minimal PDBs from
just a few lines of YAML.  A test is added to illustrate
this functionality.

llvm-svn: 297900
2017-03-15 22:18:53 +00:00
Rui Ueyama 7d271ae21d Fix wrong assertion failure.
Previously, if you have foo=bar in a definition file, this assertion
could fire because when symbols are read from file they could be mangled.
It seems that due to historical reasons underscore mangling scheme is
really ad-hoc, and I cannot find a clean way to handle this. I had
to just de-mangle symbols to search again.

llvm-svn: 297357
2017-03-09 04:47:33 +00:00
Rui Ueyama bf84c18cc1 Print an error message instead of an assertion failure.
This assertion is failing on a Chromium builder and I cannot figure out why.
This patch let it print out more info.

llvm-svn: 297353
2017-03-09 01:28:50 +00:00
Rui Ueyama 9accea6feb Pass archive files to link.exe if they contain at least one native object file.
Some archive files created during chromium build contains both BC
and native files. If that's the case, we want to pass the archive
file to link.exe. Otherwise, the MSVC linker would complain that
there's an unresolved symbol in a given set of files.

I cannot explain why link.exe doesn't complain about the presence
of bitcode files in this case, but it seems link.exe doesn't touch BC.

llvm-svn: 297229
2017-03-07 21:26:10 +00:00
Rui Ueyama e0341db179 Do not pass archive files containing bitcode files to the MSVC Linker.
If /msvclto is specified, we compile bitcode files and pass it to the
MSVC linker, stripping all bitcode files. We haven't stripped archive
files, because I was thinking that the MSVC linker wouldn't touch files
in archive files. When we pass an object file to link.exe, all symbols
have been resolved already, so link.exe shoulnd't need any of the files
in archives.

It turns out that even though link.exe doesn't need to do that, it
seems to try to read each file in all archives. And if there's a non-
COFF file in an archive, it exists with an error message. So we need
to remove archives from the command line too.

llvm-svn: 297191
2017-03-07 19:45:53 +00:00
Zachary Turner 1e021a162e [Windows] Remove the #include <eh.h> hack.
Prior to MSVC 2015 we had to manually include this header any
time we were going to include <thread> or <future> due to a
bug in MSVC's STL implementation.  This has been fixed in MSVC
for some time now, and we require VS 2015 minimum, so we can
remove this across all subprojects.

llvm-svn: 296906
2017-03-03 20:21:59 +00:00
Zachary Turner d9dc2829ea [Support] Move Stream library from MSF -> Support.
After several smaller patches to get most of the core improvements
finished up, this patch is a straight move and header fixup of
the source.

Differential Revision: https://reviews.llvm.org/D30266

llvm-svn: 296810
2017-03-02 20:52:51 +00:00
Zachary Turner 695ed56ba5 [PDB] Make streams carry their own endianness.
Before the endianness was specified on each call to read
or write of the StreamReader / StreamWriter, but in practice
it's extremely rare for streams to have data encoded in
multiple different endiannesses, so we should optimize for the
99% use case.

This makes the code cleaner and more general, but otherwise
has NFC.

llvm-svn: 296415
2017-02-28 00:04:07 +00:00
Zachary Turner 120faca41b [PDB] Partial resubmit of r296215, which improved PDB Stream Library.
This was reverted because it was breaking some builds, and
because of incorrect error code usage.  Since the CL was
large and contained many different things, I'm resubmitting
it in pieces.

This portion is NFC, and consists of:

1) Renaming classes to follow a consistent naming convention.
2) Fixing the const-ness of the interface methods.
3) Adding detailed doxygen comments.
4) Fixing a few instances of passing `const BinaryStream& X`.  These
   are now passed as `BinaryStreamRef X`.

llvm-svn: 296394
2017-02-27 22:11:43 +00:00
NAKAMURA Takumi 05a75e40da Revert r296215, "[PDB] General improvements to Stream library." and followings.
r296215, "[PDB] General improvements to Stream library."
r296217, "Disable BinaryStreamTest.StreamReaderObject temporarily."
r296220, "Re-enable BinaryStreamTest.StreamReaderObject."
r296244, "[PDB] Disable some tests that are breaking bots."
r296249, "Add static_cast to silence -Wc++11-narrowing."

std::errc::no_buffer_space should be used for OS-oriented errors for socket transmission.
(Seek discussions around llvm/xray.)

I could substitute s/no_buffer_space/others/g, but I revert whole them ATM.

Could we define and use LLVM errors there?

llvm-svn: 296258
2017-02-25 17:04:23 +00:00
Zachary Turner af299ea5d4 [PDB] General improvements to Stream library.
This adds various new functionality and cleanup surrounding the
use of the Stream library.  Major changes include:

* Renaming of all classes for more consistency / meaningfulness
* Addition of some new methods for reading multiple values at once.
* Full suite of unit tests for reader / writer functionality.
* Full set of doxygen comments for all classes.
* Streams now store their own endianness.
* Fixed some bugs in a few of the classes that were discovered
  by the unit tests.

llvm-svn: 296215
2017-02-25 00:44:30 +00:00
Zachary Turner d2684b7969 [PDB] Rename Stream related source files.
This is part of a larger effort to get the Stream code moved
up to Support.  I don't want to do it in one large patch, in
part because the changes are so big that it will treat everything
as file deletions and add, losing history in the process.
Aside from that though, it's just a good idea in general to
make small changes.

So this change only changes the names of the Stream related
source files, and applies necessary source fix ups.

llvm-svn: 296211
2017-02-25 00:33:34 +00:00
Rui Ueyama 85d54b050e Fix /msvclto.
Previously, bitcode files in library paths were passed to the MSVC linker.
This patch strips them.

llvm-svn: 295913
2017-02-23 00:26:42 +00:00
Rui Ueyama 98eafd67d5 Attempt to fix buildbot.
I added this log message to test the /msvclto option, but
this output might confuse FileCheck. This patch attempts to fix
it by removing it.

llvm-svn: 295793
2017-02-22 00:06:18 +00:00
Rui Ueyama e6e206d4b4 Do not use errs() or outs() directly. Instead use message(), log() or error()
LLD is a multi-threaded program. errs() or outs() are not guaranteed
to be thread-safe (they are actually not).

LLD's message(), log() or error() are thread-safe. We should use them.

llvm-svn: 295787
2017-02-21 23:22:56 +00:00
David Blaikie 4cdfe69982 Revert "[COFF] support /ERRORLIMIT option"
Behavior races on ErrorCount. If the enqueued paths are evaluated
eagerly (in enqueuePath) then the behavior is as the test expects. But
they may not be evaluated until the future is waited on, in run() -
which is after the early return/exit on ErrorCount. (this causes the
test to fail (because in the "/ERRORCOUNT:XYZ" test, no other errors
are printed), at least for me, on linux)

This reverts commit r295507.

llvm-svn: 295590
2017-02-19 02:25:47 +00:00
Bob Haarman b96b10102a [COFF] support /ERRORLIMIT option
Summary: This adds support for reporting multiple errors in a single invocation of lld-link. The limit defaults to 20 and can be changed with the /ERRORLIMIT command line parameter, or set to unlimited by passing a value of 0.

Reviewers: pcc, ruiu

Reviewed By: ruiu

Differential Revision: https://reviews.llvm.org/D29691

llvm-svn: 295507
2017-02-17 22:46:06 +00:00
Zachary Turner 7b327d051b [pdb] Add the ability to resolve TypeServer PDBs.
Some PDBs or object files can contain references to other PDBs
where the real type information lives.  When this happens,
all type indices in the original PDB are meaningless because
their records are not there.

With this patch we add the ability to pull type info from those
secondary PDBs.

Differential Revision: https://reviews.llvm.org/D29973

llvm-svn: 295382
2017-02-16 23:35:45 +00:00
Eric Fiselier 87c87f4c30 [CMake] Fix pthread handling for out-of-tree builds
LLVM defines `PTHREAD_LIB` which is used by AddLLVM.cmake and various projects
to correctly link the threading library when needed. Unfortunately
`PTHREAD_LIB` is defined by LLVM's `config-ix.cmake` file which isn't installed
and therefore can't be used when configuring out-of-tree builds. This causes
such builds to fail since `pthread` isn't being correctly linked.

This patch attempts to fix that problem by renaming and exporting
`LLVM_PTHREAD_LIB` as part of`LLVMConfig.cmake`. I renamed `PTHREAD_LIB`
because It seemed likely to cause collisions with downstream users of
`LLVMConfig.cmake`.

llvm-svn: 294690
2017-02-10 01:59:20 +00:00
Bob Haarman 69b196dd91 [COFF] added support for /lldsavetemps
Summary: This adds an option to save temporary files generated during link-time optimization. This can be useful for debugging.

Reviewers: ruiu, pcc

Reviewed By: ruiu, pcc

Subscribers: mehdi_amini

Differential Revision: https://reviews.llvm.org/D29518

llvm-svn: 294498
2017-02-08 18:36:41 +00:00
Saleem Abdulrasool b6394287e2 COFF: ensure that we handle bad arguments
The parameter to /debugtype is user provided and may be invalid.  Ensure
that we gracefully handle bad input.

llvm-svn: 294280
2017-02-07 04:28:05 +00:00
Saleem Abdulrasool 0acd6dd6ce COFF: prevent nullptr dereference
If `/debugtypes` is used to omit the codeview information, we would not
have constructed the debug info codeview record which is used to tie the
PDB to the binary.  In such a case, rub out the GUID and Age fields.

llvm-svn: 294279
2017-02-07 04:28:02 +00:00
Rui Ueyama 1e0b158dbd Add an option to use the MSVC linker to link LTO-generated object files.
This patch defines a new command line option, /MSVCLTO, to LLD.
If that option is given, LLD invokes link.exe to link LTO-generated
object files. This is hacky but useful because link.exe can create
PDB files.

Differential Revision: https://reviews.llvm.org/D29526

llvm-svn: 294234
2017-02-06 20:47:55 +00:00
Bob Haarman cd7197fec3 fix nullptr dereference in COFF/Symbol.h
llvm-svn: 294064
2017-02-03 23:05:17 +00:00
Ismail Donmez 82c489f2a6 Fix shared build after r293965 (Core) and r293967 (COFF)
llvm-svn: 293996
2017-02-03 10:13:39 +00:00
Bob Haarman cde5e5b600 refactor COFF linker to use new LTO API
Summary: The COFF linker previously implemented link-time optimization using an API which has now been marked as legacy. This change refactors the COFF linker to use the new LTO API, which is also used by the ELF linker.

Reviewers: pcc, ruiu

Reviewed By: pcc

Subscribers: mgorny, mehdi_amini

Differential Revision: https://reviews.llvm.org/D29059

llvm-svn: 293967
2017-02-02 23:58:14 +00:00
Rui Ueyama a9b29615fb Re-submit r293820: Return Error instead of bool from mergeTypeStreams().
llvm-svn: 293847
2017-02-02 00:47:10 +00:00
Rui Ueyama 7d07a1652d Revert r293820: Return Error instead of bool from mergeTypeStreams().
It broke buildbots.

llvm-svn: 293824
2017-02-01 22:28:43 +00:00
Rui Ueyama 00d4f49717 Return Error instead of bool from mergeTypeStreams().
Previously, mergeTypeStreams returns only true or false, so it was
impossible to know the reason if it failed. This patch changes the
function signature so that it returns an Error object.

Differential Revision: https://reviews.llvm.org/D29362

llvm-svn: 293820
2017-02-01 22:09:34 +00:00
Rui Ueyama eb1ad400f9 Print alignment in decimal instead of hexadecimal.
Previously, we were printing out something like this for
sections/symbols with alignment 16

  0000000000201000 0000000000000182    10 .data

which I think confusing. I think printing it in decimal is better.

Differential Revision: https://reviews.llvm.org/D29258

llvm-svn: 293685
2017-01-31 20:42:34 +00:00
Sylvestre Ledru 1cb3c2f82d Remove unused 'using' declaration. Found by clang-tidy: misc-unused-using-decls NFC
llvm-svn: 293380
2017-01-28 13:41:32 +00:00
Adrian McCarthy 6b6b8c4fb9 NFC: Rename (PDB) RawSession to NativeSession
This eliminates one overload on the term Raw.

Differential Revision: https://reviews.llvm.org/D29098

llvm-svn: 293104
2017-01-25 22:38:55 +00:00
Zachary Turner 760ad4da60 [pdb] Write the Named Stream mapping to Yaml and binary.
Differential Revision: https://reviews.llvm.org/D28919

llvm-svn: 292665
2017-01-20 22:42:09 +00:00
Bob Haarman 6c8f736ba7 COFF: add error() and warn() to Error.{cpp,h}
Summary: This copies over some functionality we have in ELF/Error.{cpp,h} and makes it available in COFF/Error.{cpp,h}

Reviewers: pcc, rafael, ruiu

Subscribers:

Differential Revision: https://reviews.llvm.org/D28692

llvm-svn: 292240
2017-01-17 19:07:42 +00:00
George Rimar 548adcdec4 [COFF] - Fixed format in writeOutSecLine()
The same as https://reviews.llvm.org/rL292102,
fixes next testcases under msvs2015/win32:

25>  Failing Tests (3):
25>      lld :: COFF/lldmap.test
25>      lld :: COFF/weak-external.test
25>      lld :: COFF/weak-external3.test

llvm-svn: 292104
2017-01-16 11:46:55 +00:00
Rui Ueyama 483ffa3365 Simplify string output. NFC.
llvm-svn: 292042
2017-01-15 01:11:47 +00:00
Rui Ueyama 543731f96a Directly write to a -Map file.
Previous code had a bug that if the program exits with an assert() or
fail() before the control reaches end of writeMapFile(), it leaves a
temporary file, because FileRemover's dtor isn't called in that case.

I could fix that by removeFileOnSignal() and other functions, but
I think we can simply write to the result file directly. I think
that is straightforward and easy to understand.

Additionally, that allows something like `-Map /dev/null` or a bash
hack such as `-Map >(grep symbol-im-looking-for)`. Previously,
that kind of things didn't work.

Differential Revision: https://reviews.llvm.org/D28714

llvm-svn: 292041
2017-01-15 00:41:21 +00:00
Peter Collingbourne 6f24fdb6a0 COFF: Change the /lldmap output format to be more like the ELF linker.
Differential Revision: https://reviews.llvm.org/D28717

llvm-svn: 291990
2017-01-14 03:14:46 +00:00
Bob Haarman 848c569734 COFF: include relocation type in unsupported relocation message
Summary: When we encouter a relocation type we don't know how to handle, this change causes us to print out the hexadecimal value of the relocation type. This makes troubleshooting a little easier.

Reviewers: ruiu, zturner

Differential Revision: https://reviews.llvm.org/D28576

llvm-svn: 291962
2017-01-13 22:05:22 +00:00
Rui Ueyama 5289662e4a PDB: Merge type info.
This patch is to merge type info in multiple .debug$T sections.

One mystery that needs to be solved is that it is not clear how
the MSVC linker uses TPI and IPI streams. Both streams contain
type info, and it is not obvious what kind of record should go
which.

dumppdb command in microsoft-pdb repository prints out IPI stream
contents as "IDs" and TPI stream as "TYPES", but looks like the tool
don't really care about which stream type recrods were read from.

For now, in this patch, I emit all type records to TPI stream.
It might just work with other tools. If not, we need to investigate
it more.

llvm-svn: 291739
2017-01-12 03:09:25 +00:00
Zachary Turner 629cb7d8cc [CodeView] Finish decoupling TypeDatabase from TypeDumper.
Previously the type dumper itself was passed around to a lot of different
places and manipulated in ways that were more appropriate on the type
database. For example, the entire TypeDumper was passed into the symbol
dumper, when all the symbol dumper wanted to do was lookup the name of a
TypeIndex so it could print it. That's what the TypeDatabase is for --
mapping type indices to names.

Another example is how if the user runs llvm-pdbdump with the option to
dump symbols but not types, we still have to visit all types so that we
can print minimal information about the type of a symbol, but just without
dumping full symbol records. The way we did this before is by hacking it
up so that we run everything through the type dumper with a null printer,
so that the output goes to /dev/null. But really, we don't need to dump
anything, all we want to do is build the type database. Since
TypeDatabaseVisitor now exists independently of TypeDumper, we can do
this. We just build a custom visitor callback pipeline that includes a
database visitor but not a dumper.

All the hackery around printers etc goes away. After this patch, we could
probably even delete the entire CVTypeDumper class since really all it is
at this point is a thin wrapper that hides the details of how to build a
useful visitation pipeline. It's not a priority though, so CVTypeDumper
remains for now.

After this patch we will be able to easily plug in a different style of
type dumper by only implementing the proper visitation methods to dump
one-line output and then sticking it on the pipeline.

Differential Revision: https://reviews.llvm.org/D28524

llvm-svn: 291724
2017-01-11 23:24:22 +00:00
Zachary Turner a9054ddd9c [CodeView/PDB] Rename a bunch of files.
We were starting to get some name clashes between llvm-pdbdump
and the common CodeView framework, so I took this opportunity
to rename a bunch of files to more accurately describe their
usage.  This also helps in llvm-pdbdump to distinguish
between different files and whether they are used for pretty
dump mode or raw dump mode.

llvm-svn: 291627
2017-01-11 00:35:43 +00:00
Rui Ueyama 7a8ff1368a Unbreak Darwin buildbots.
llvm-svn: 291224
2017-01-06 10:15:47 +00:00
Rui Ueyama b4c63caf76 Rename lld::stringize -> lld::toString.
llvm-svn: 291223
2017-01-06 10:04:35 +00:00
Rui Ueyama ce039266c1 Merge elf::toString and coff::toString.
The two overloaded functions hid each other. This patch merges them.

llvm-svn: 291222
2017-01-06 10:04:08 +00:00
Rui Ueyama 7f1f912794 Use TarWriter to create tar archives instead of cpio.
This is how we use TarWriter in LLD. Now LLD does not append
a file extension, so you need to pass `--reproduce foo.tar`
instead of `--reproduce foo`.

Differential Revision: https://reviews.llvm.org/D28103

llvm-svn: 291210
2017-01-06 02:33:53 +00:00
Saleem Abdulrasool df8a13b257 COFF: tie the execute and the PDB together
The PDB GUID, Age, and version are tied together by the RSDS record in
the binary.  Pass along the BuildId information into the createPDB to
allow us to tie the binary and the PDB together.

llvm-svn: 290975
2017-01-04 17:56:54 +00:00
Saleem Abdulrasool 1618a653f3 COFF: replace a magic number and assert more
Assert that the size of the MD5 result is the same size as the signature
field being populated.  Use the sizeof operator to determine the size of
the field being written rather than hardcoding it to the magic number
16.  NFC.

llvm-svn: 290764
2016-12-30 19:02:04 +00:00
Rui Ueyama 9381eb1045 Remove lld/Support/Memory.h.
I thought for a while about how to remove it, but it looks like we
can just copy the file for now. Of course I'm not happy about that,
but it's just less than 50 lines of code, and we already have
duplicate code in Error.h and some other places. I want to solve
them all at once later.

Differential Revision: https://reviews.llvm.org/D27819

llvm-svn: 290062
2016-12-18 14:06:06 +00:00
Peter Collingbourne c1ded7dcef COFF: Cache the result of library searches.
File system operations were still dominating the profile on Windows. In this
case we were spending a significant amount of our time repeatedly searching
for libraries as a result of processing linker directives. Address this
by caching whether we have already found a library with a given name. For
chrome_child.dll:

Before: 10.53s
After: 6.88s

Differential Revision: https://reviews.llvm.org/D27840

llvm-svn: 289915
2016-12-16 03:45:59 +00:00
Peter Collingbourne 6ee0b4e9f5 COFF: Open and map input files asynchronously on Windows.
Profiling revealed that the majority of lld's execution time on Windows was
spent opening and mapping input files. We can reduce this cost significantly
by performing these operations asynchronously.

This change introduces a queue for all operations on input file data. When
we discover that we need to load a file (for example, when we find a lazy
archive for an undefined symbol, or when we read a linker directive to
load a file from disk), the file operation is launched using a future and
the symbol resolution operation is enqueued.  This implies another change
to symbol resolution semantics, but it seems to be harmless ("ninja All"
in Chromium still succeeds).

To measure the perf impact of this change I linked Chromium's chrome_child.dll
with both thin and fat archives.

Thin archives:

Before (median of 5 runs): 19.50s
After: 10.93s

Fat archives:

Before: 12.00s
After: 9.90s

On Linux I found that doing this asynchronously had a negative effect on
performance, probably because the cost of mapping a file is small enough that
it becomes outweighed by the cost of managing the futures. So on non-Windows
platforms I use the deferred execution strategy.

Differential Revision: https://reviews.llvm.org/D27768

llvm-svn: 289760
2016-12-15 04:02:23 +00:00
Peter Collingbourne e50f4854c2 COFF: Fix memory leaks reported by lsan.
llvm-svn: 289451
2016-12-12 18:42:09 +00:00
Saleem Abdulrasool f1af26ddf2 build: add support for standalone lld build
Enable building lld as a standalone project. This is motivated by the desire to
package lld for inclusion in a linux distribution. This allows building lld
against an existing paired llvm installation. Now that lld is usable on x86_64,
it makes sense to revive this configuration to allow distributions to package
it.

llvm-svn: 289421
2016-12-12 05:47:40 +00:00
Peter Collingbourne 4b5a7ac831 COFF: Remove an unused mutex declaration.
llvm-svn: 289415
2016-12-12 03:16:18 +00:00
Peter Collingbourne 8155dfa8f3 COFF: Use a DenseSet instead of a map to atomic_flag to track which archive members have been read.
Differential Revision: https://reviews.llvm.org/D27667

llvm-svn: 289414
2016-12-12 03:16:14 +00:00
Peter Collingbourne 3f530938f6 COFF: Use CachedHashStringRef in the symbol table.
This resulted in about a 1% perf improvement linking chrome_child.dll.

Differential Revision: https://reviews.llvm.org/D27666

llvm-svn: 289410
2016-12-11 22:15:30 +00:00
Peter Collingbourne 8b65e51b73 COFF: Load inputs immediately instead of adding them to a queue.
This patch replaces the symbol table's object and archive queues, as well as
the convergent loop in the linker driver, with a design more similar to the
ELF linker where symbol resolution directly causes input files to be added to
the link, including input files arising from linker directives. Effectively
this removes the last vestiges of the old parallel input file loader.

Differential Revision: https://reviews.llvm.org/D27660

llvm-svn: 289409
2016-12-11 22:15:25 +00:00
Peter Collingbourne 99111287fc COFF: Use a bit in SymbolBody to track which symbols are written to the symbol table.
Using a set here caused us to take about 1 second longer to write the symbol
table when linking chrome_child.dll. With this I consistently get better
performance on Windows with the new symbol table.

Before r289280 and with r289183 reverted (median of 5 runs): 17.65s
After this change: 17.33s

On Linux things look even better:

Before: 10.700480444s
After: 5.735681610s

Differential Revision: https://reviews.llvm.org/D27648

llvm-svn: 289408
2016-12-11 22:15:20 +00:00
Rui Ueyama 327705d17d Create a TPI stream only when /debugpdb is given.
Adding type records to TPI stream is too time consuming.
It is reported that linking chrome_child.dll took 5 minutes.

llvm-svn: 289330
2016-12-10 17:23:23 +00:00
Ismail Donmez 85588fa2b0 Fix shared library build
llvm-svn: 289320
2016-12-10 09:29:47 +00:00
Peter Collingbourne 6baa5d276d COFF: Fix test failure on Windows.
llvm-svn: 289289
2016-12-09 23:34:49 +00:00
Peter Collingbourne 79a5e6b1b7 COFF: New symbol table design.
This ports the ELF linker's symbol table design, introduced in r268178,
to the COFF linker.

Differential Revision: http://reviews.llvm.org/D21166

llvm-svn: 289280
2016-12-09 21:55:24 +00:00
Hans Wennborg 1818e65aad COFF: Support both /lldmap and /lldmap:<file>
The former option bases the filename on the output name, e.g. if the
link output is a.exe, the map will be written to a.map. This matches the
behaviour of link.exe's /MAP option and is useful for creating a map
file of each executable when building a large project.

Differential Revision: https://reviews.llvm.org/D27595

llvm-svn: 289271
2016-12-09 20:54:44 +00:00
Peter Collingbourne fa7f393714 COFF: Move a call to toString() out of the hot path.
Profiling revealed that we were spending 5% of our time linking
chrome_child.dll just in this call to toString().

Differential Revision: https://reviews.llvm.org/D27628

llvm-svn: 289270
2016-12-09 20:51:33 +00:00
Rui Ueyama 26186c7e0f Add type records to TPI stream.
I don't think the data I add to a TPI stream in this patch is correct,
but at least it can be displayed using llvm-pdbdump. Until I add more
streams to a PDB file, I'm not able to know whether the data will be
accepted by MSVC tools or not.

llvm-svn: 289183
2016-12-09 04:46:54 +00:00
Rui Ueyama 7a0a076e40 COFF: Use make() in SymbolTable and Writer.
llvm-svn: 289170
2016-12-09 02:13:12 +00:00
Rui Ueyama 968468033c Fix -Wunused-private-field.
llvm-svn: 289112
2016-12-08 21:49:18 +00:00
Rui Ueyama 8d433d71f5 COFF: Use a string saver in Memory.h in Driver.
llvm-svn: 289104
2016-12-08 21:27:09 +00:00
Rui Ueyama 8fe1767cdd Remove unnecessary `llvm::`.
llvm-svn: 289102
2016-12-08 20:50:47 +00:00
Rui Ueyama bf4ad1d63d COFF: Use make() to create a new file object in createFile.
llvm-svn: 289097
2016-12-08 20:20:22 +00:00
Rui Ueyama 7fed58cd9f Start using make() in COFF (with a smaller change.)
llvm-svn: 289089
2016-12-08 19:10:28 +00:00
Rui Ueyama aa4f4450af Revert r289084: Start using make() in COFF.
This reverts commit r289084 to appease buildbots.

llvm-svn: 289086
2016-12-08 18:49:04 +00:00
Rui Ueyama 843233b920 Start using make() in COFF.
We don't want ELF and COFF to diverge too much.

llvm-svn: 289085
2016-12-08 18:31:18 +00:00
Rui Ueyama 332e02a164 Fix Windows buildbots.
clang-format-diff sorted these #include's in the asciibetical order,
but they need to be in this order.

llvm-svn: 288995
2016-12-07 23:24:32 +00:00
Rui Ueyama a45d45e231 COFF: Define overloaded toString functions.
Previously, we had different way to stringize SymbolBody and InputFile
to construct error messages. This patch defines overloaded function
toString() so that we don't need to memorize all these different
function names.

With that change, it is now easy to include demangled names in error
messages. Now, if there is a symbol name conflict, we'll print out
both mangled and demangled names.

llvm-svn: 288992
2016-12-07 23:17:02 +00:00
Rui Ueyama 3a618e5606 Port parallel ICF to COFF.
LLD used to take 11.73 seconds to link Clang. Now it is 6.94 seconds.
MSVC link takes 83.02 seconds. Note that ICF is enabled by default on
Windows, so a low latency ICF is more important than in ELF.

llvm-svn: 288487
2016-12-02 08:03:58 +00:00
Rui Ueyama 27498b5dd5 Fix a bug in ICF involving COFF associative sections.
Associative sections are sections that need to be linked if their associated
sections are linked. Associative sections are used to append auxiliary data
such as debug info.

Previously, we compared all associative sections when comparing two comdat
sections. Because usually assocative sections are not mergeable sections,
we missed a lot of mergeable sections. MSVC linker doesn't seem to check
the identity of associative sections.

This patch makes LLD to ignore associative sections when doing ICF.

llvm-svn: 288483
2016-12-02 07:46:12 +00:00
Rui Ueyama c5cb737584 Dump Codeview type information correctly.
llvm-svn: 288298
2016-12-01 01:22:48 +00:00
Rui Ueyama bf4ddeb97c Style fix.
llvm-svn: 288113
2016-11-29 04:22:57 +00:00
Rui Ueyama c910bc7e19 Simplify "missing argument" error message.
llvm-svn: 288112
2016-11-29 04:17:31 +00:00
Rui Ueyama e5e407beb4 Add comments.
llvm-svn: 288111
2016-11-29 04:17:30 +00:00
Rui Ueyama bd2a812ff0 Print error message header in red.
llvm-svn: 288110
2016-11-29 04:09:08 +00:00
Rui Ueyama bf9523f549 [COFF] Add DebugInfoCodeView dependency
rL287555 introduces a link error when building with BUILD_SHARED_LIBS:

  undefined reference to llvm::codeview::CVSymbolDumper::dump(),
  and more...

The functions are available in libDebugInfoCodeView, from LLVM.

Patch by Visoiu Mistrih Francis!

llvm-svn: 287837
2016-11-23 22:58:25 +00:00
Rui Ueyama 24625fd9b2 Dump not only type records but symbol records.
llvm-svn: 287723
2016-11-22 23:51:34 +00:00
Rui Ueyama be939b3ff6 Do plumbing work for CodeView debug info.
Previously, we discarded .debug$ sections. This patch adds them to
files so that PDB.cpp can access them.

This patch also adds a debug option, /dumppdb, to dump debug info
fed to createPDB so that we can verify that valid data has been passed.

llvm-svn: 287555
2016-11-21 17:22:35 +00:00
Chris Bieneman aeb30257c5 [CMake] NFC. Updating CMake dependency specifications
This patch updates a couple places where add_dependencies was being explicitly called to add dependencies on intrinsics_gen to instead use the DEPENDS named parameter. This cleanup is needed for a patch I'm working on to add a dependency debugging mode to the build system.

llvm-svn: 287205
2016-11-17 04:36:35 +00:00
Rui Ueyama c91f716643 PDB: Add "* Linker *" module.
The added module contains nothing, but it is still useful as a test
to ensure that we are emitting modules that can be read back.

llvm-svn: 287071
2016-11-16 01:10:46 +00:00
Rui Ueyama c3dcf99441 [COFF] Fix manifest resource file creation on Windows.
createManifestRes was generating a MemoryBuffer from a TemporaryFile,
keeping the data but removing the file, before passing the file path
to CVTRES.exe, leading to the following error:

  CVTRES : fatal error CVT1101: cannot open 'C:\Users\user\AppData\
  Local\Temp\lld-output-resource-bfee19.res' for reading

With this, we instead create a new TemporaryFile before passing it to cvtres.

Patch from Rudy Pons!

llvm-svn: 287034
2016-11-15 21:25:20 +00:00
Rui Ueyama f83806a8ad Identify object files compiled with cl.exe /GL.
Object files compiled with cl.exe /GL contain intermediate code for LTO.
We can't (and don't want to) interpret such code, but we should print
out a user-friendly error message.

Differential Revision: https://reviews.llvm.org/D26647

llvm-svn: 286921
2016-11-15 01:01:51 +00:00
Vitaly Buka 4cf112c6f2 Fix heap-use-after-free coff::createPDB
Summary:
getInputSections returns std::vector by value and ArrayRef
pointed to destroyed temporarily.

Reviewers: ruiu

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D26630

llvm-svn: 286880
2016-11-14 20:21:41 +00:00
Rui Ueyama 09e0b5f2c9 Emit Section Contributions.
Differential Revision: https://reviews.llvm.org/D26211

llvm-svn: 286684
2016-11-12 00:00:51 +00:00
Mehdi Amini c1edf566b9 Prevent at compile time converting from Error::success() to Expected<T>
This would trigger an assertion at runtime otherwise.

Differential Revision: https://reviews.llvm.org/D26482

llvm-svn: 286562
2016-11-11 04:29:25 +00:00
Davide Italiano c520e18ce0 [lld/COFF] Don't round alignment if it's already a power-of-two.
This matches link.exe behaviour.

Differential Revision:  https://reviews.llvm.org/D26372

llvm-svn: 286553
2016-11-11 02:53:48 +00:00
Reid Kleckner f47c3bb8db Make the .idata$4 and .idata$5 import lib sections 8 bytes on x64
The MSVC linker relies on this invariant to produce a valid import
table. More ASan tests pass in a stage 2 build now. They still fail when
using LLD since there are no PDBs for the dynamic ASan runtime.

llvm-svn: 286499
2016-11-10 20:38:58 +00:00
Rui Ueyama 6294a240dc Fix -Wcast-qual warnings.
llvm-svn: 286001
2016-11-04 17:41:29 +00:00
Rui Ueyama 20df4ecf4f Re-commit r285607: Emit Section Map stream."
Removed some test fields that overspecified test conditions.

llvm-svn: 285638
2016-10-31 21:09:21 +00:00
Rui Ueyama e7b54c2ea5 Revert r285607: Emit Section Map stream.
That change broke buildbots.

llvm-svn: 285618
2016-10-31 18:50:13 +00:00
Rui Ueyama 86a1ef388b Emit Section Map stream.
This is how we use DbiStreamBuilder::addSectionMap.

Differential Revision: https://reviews.llvm.org/D26113

llvm-svn: 285607
2016-10-31 17:40:40 +00:00
Chris Bieneman 62113e854a [CMake] Add missing dependency on intrinsics_gen
COFF/InputFiles.h includes LTOModule.h which transitively relies on Attributes.inc.

llvm-svn: 284444
2016-10-18 00:50:39 +00:00
Hans Wennborg cb8f2ef644 LTO: Don't follow lazy references when seeing new definitions in the combined LTO object
Following the lazy reference might bring in an object file that depends
on bitcode files that weren't part of the LTO step.

Differential Revision: https://reviews.llvm.org/D25461

llvm-svn: 283989
2016-10-12 09:00:06 +00:00
Rui Ueyama 9f66f8277d Re-submit r283825: Add section header stream to PDB.
It was reverted because the change that depends on was reverted.
Now it was submitted as r283925, so we can submit this as well.

llvm-svn: 283926
2016-10-11 19:45:07 +00:00
Rui Ueyama 9aa4ab6f9b Revert "Add section header stream to PDB." because it depends on r283823.
The change this patch depends on was reverted.

llvm-svn: 283837
2016-10-11 01:01:40 +00:00
Rui Ueyama 55505954fe Add section header stream to PDB.
Differential Revision: https://reviews.llvm.org/D25357

llvm-svn: 283825
2016-10-10 23:44:10 +00:00
Rui Ueyama 1343fac3ca Add an empty DBI stream.
llvm-svn: 283504
2016-10-06 22:52:01 +00:00
Rui Ueyama 8d3fb5da7b Add exact number of streams for reserved stream #s.
llvm-svn: 283397
2016-10-05 22:08:58 +00:00
Rui Ueyama d381c9842b Add an empty IPI stream.
With this, "llvm-pdbdump yaml -ipi-stream" prints out an IPI stream.
Previously it crashed because it can't handle the case where IPI
stream doesn't exist.

llvm-svn: 283392
2016-10-05 21:37:25 +00:00
Mehdi Amini ec4fb5ba97 Use StringRef in StringSaver API (NFC)
llvm-svn: 283290
2016-10-05 01:32:41 +00:00
Rui Ueyama ab8e88b686 Remove unused parameter.
I do not fully understand how to use these classes yet, but
seems like these arguments are not used, since without them
all tests still pass. In order to simplify the situation,
I'll remove them now.

llvm-svn: 283174
2016-10-04 01:03:03 +00:00
Rui Ueyama c79ecdd876 Use StringSwtich::Cases for multiple choices.
llvm-svn: 282964
2016-09-30 22:01:25 +00:00
Rui Ueyama 129795497d Change for LLVM upstream change r282944.
llvm-svn: 282945
2016-09-30 20:53:45 +00:00
Rui Ueyama 5c82eeaf23 Change for LLVM change r282940.
llvm-svn: 282942
2016-09-30 20:39:04 +00:00
Martin Storsjo 63762b58c0 [COFF] Add support for IMAGE_REL_ARM_SECREL
Handle this in the exact same way as IMAGE_REL_AMD64_SECREL
and IMAGE_REL_I386_SECREL.

Differential revision: https://reviews.llvm.org/D24608

llvm-svn: 282531
2016-09-27 19:27:17 +00:00
Rui Ueyama 3e9d6bbad6 Create FileOutputBuffer lazily.
So that it is clear that FileOutputBuffer does not depend on
PDB file builder. Eventually we will have to to get the file size
info from the file builder to create a file with the exact size.
NFC.

llvm-svn: 282454
2016-09-26 23:53:55 +00:00
Rui Ueyama bb542b3f0c Partially fill Info stream with proper values.
llvm-svn: 281795
2016-09-16 22:51:17 +00:00
Ismail Donmez e7174ffcd8 Fix shared library build
llvm-svn: 281728
2016-09-16 14:10:23 +00:00
Rui Ueyama b28c6d495d Use functions in DebugInfoPDB to create dummy PDB file.
I don't think we are creating valid PDB file here,
but it is okay because we have never created valid PDBs before.

llvm-svn: 281704
2016-09-16 04:32:33 +00:00
Rui Ueyama 1d99ab3925 Create PDB.h and move code to remove unnecessary #includes.
llvm-svn: 281670
2016-09-15 22:24:51 +00:00
Rui Ueyama 7f38299919 Use SuperBlock struct defined in MSFCommon.h.
llvm-svn: 281643
2016-09-15 18:55:18 +00:00
Saleem Abdulrasool 88f6407542 COFF: make builds more reproducible
Change the way we calculate the build id to use MD5 to give reproducible build
ids. Previously we would generate random bytes for the build id GUID.

llvm-svn: 281079
2016-09-09 19:26:03 +00:00
Rui Ueyama fa12b8bd1a Remove temoprary files.
Previously, we created temporary files using llvm::sys::fs::createTemporaryFile
and removed them using llvm::FileRemover. This is error-prone as it is easy to
forget creating FileRemover instances after creating temporary files.
There is actually a temporary file leak bug.

This patch introduces a new class, TemporaryFile, to manage temporary files
in the RAII style.

Differential Revision: https://reviews.llvm.org/D24176

llvm-svn: 280510
2016-09-02 17:34:17 +00:00
Ivan Krasin 8baccc2f19 Fix UBSan bot by not passing NULL into memcpy src.
Summary:
UBSan complains like the following:
tools/lld/COFF/Writer.cpp:97:15: runtime error: null pointer passed as argument 2, which is declared to never be null

The reason is that the vector could be empty.

Reviewers: rsmith

Subscribers: Eugene.Zelenko, kcc

Differential Revision: https://reviews.llvm.org/D24050

llvm-svn: 280259
2016-08-31 17:23:05 +00:00
Saleem Abdulrasool dcbf2cbfca COFF: disambiguate make_unique (NFC)
This disambiguates `llvm::make_unqiue` and `std::make_unique` for the Windows
buildbots.

llvm-svn: 280014
2016-08-29 21:33:01 +00:00
Saleem Abdulrasool 8fcff934ba COFF: add beginnings of debug directory creation
The IMAGE_FILE_HEADER structure contains a (RVA, size) to an array of
COFF_DEBUG_DIRECTORY records. Each one of these records contains an RVA to a OMF
Debug Directory. These OMF debug directories are derived into newer types such
as PDB70, PDB20, etc. This constructs a PDB70 structure which will allow us to
associate a GUID with a build to actually tie debug information.

llvm-svn: 280012
2016-08-29 21:20:46 +00:00
Saleem Abdulrasool 9f8bc029bd COFF: hoist a local variable
Create a local variable for the rdata section.  NFC.

llvm-svn: 279407
2016-08-21 23:05:43 +00:00
Saleem Abdulrasool 15f6f6cb97 COFF: reorder the table construction
Reorder the table setup to mirror the indices corresponding to them.  This means
that the table values are filled out as per the enumeration ordering.  Doing so
makes it easier to identify a particular table.  NFC.

llvm-svn: 278199
2016-08-10 04:37:56 +00:00
Saleem Abdulrasool a2cca7e2b4 COFF: handle /debugtype option
Add the support infrastructure for the /debugtype option which takes a comma
delimited list of debug info to generate. The defaults are based on other
options potentially (/driver or /profile). This sets up the infrastructure to
allow us to emit RSDS records to get "build id" equivalents on COFF (similar to
binutils).

llvm-svn: 278056
2016-08-08 22:02:44 +00:00
Benjamin Kramer df8f196f9a Unpollute the global namespace. lld edition.
llvm-svn: 277926
2016-08-06 13:52:37 +00:00
Saleem Abdulrasool fd063e796f COFF ARM: Apply an existing offset in MOV32T relocations
Don't blindly OR in the new value, but clear the existing one, since it can be
nonzero. Read out the existing value before, and add into the desired offset.
(The add is done outside of the applyMOV, to handle potential overflow between
the two.)

Patch by Martin Storsjö!

llvm-svn: 277846
2016-08-05 18:20:31 +00:00
Saleem Abdulrasool eea45bc478 COFF ARM: Error out if 24 bit thumb branches are out of range
In the ELF linker, the same situation already errors out with "relocation
R_ARM_THM_CALL out of range".

Patch by Martin Storsjö!

llvm-svn: 277838
2016-08-05 17:33:24 +00:00
Saleem Abdulrasool 8202c6dbdf COFF ARM: Clear the J1 and J2 bits when applying relocations to 24 bit branches
The opcode for the bl branches can initially be F000 F800, i.e.
the J1 and J2 bits are already set. Therefore mask these bits out
before or'ing in the new bits.

Patch by Martin Storsjö!

llvm-svn: 277836
2016-08-05 17:28:21 +00:00
Kevin Enderby 0fa9fd0f28 Needed change to lld for the changes to libObject/Archive interfaces now returning Expected<>
for the llvm trunk change in r277656

llvm-svn: 277657
2016-08-03 21:58:48 +00:00
Nico Weber 204f7dc56e lld-link: Include the name of bad input files in several "input file is bad" diagnostics.
Also change a few getName() calls to getShortName() calls.
https://reviews.llvm.org/D23123
Part of PR28553.

llvm-svn: 277616
2016-08-03 18:07:28 +00:00
Nico Weber c9d9b31ba7 Revert an unintentional change from r277599
llvm-svn: 277600
2016-08-03 14:38:52 +00:00
Nico Weber 2e36772caf Revert 277594, it caused PR28827
llvm-svn: 277599
2016-08-03 14:37:57 +00:00
Peter Collingbourne feee2103c6 COFF: Implement /linkrepro flag.
This flag is implemented similarly to --reproduce in the ELF linker.

This patch implements /linkrepro by moving the cpio writer and associated
utility functions to lldCore, and using that implementation in both linkers.

One COFF-specific detail is that we store the object file from which the
resource files were created in our reproducer, rather than the resource
files themselves. This allows the reproducer to be used on non-Windows
systems for example.

Differential Revision: https://reviews.llvm.org/D22418

llvm-svn: 276719
2016-07-26 02:00:42 +00:00
Rui Ueyama bb57954241 COFF: Update error messages so that they start with lowercase letters.
llvm-svn: 275513
2016-07-15 01:12:24 +00:00
Rui Ueyama 5694ebbc8b Remove unnecessary explicit call of Twine ctor.
llvm-svn: 275512
2016-07-15 01:06:40 +00:00
Rui Ueyama 659a4f2f38 Make check() always return a value.
Previously, one of two check functions didn't return a value.
It was confusing. This patch makes both functions return values.

llvm-svn: 275511
2016-07-15 01:06:38 +00:00
Rui Ueyama 0d09a865c6 COFF: Remove `void error()` functions and use fatal instead.
This change makes the control flow more explicit.

llvm-svn: 275504
2016-07-15 00:40:46 +00:00
Rui Ueyama 1a3fd13776 COFF: Remove unnecessary explicit calls of Twine ctor.
llvm-svn: 275501
2016-07-14 23:43:36 +00:00
Rui Ueyama 606047939c COFF: Rename noreturn error -> fatal.
This new name is also consistent with ELF.

llvm-svn: 275500
2016-07-14 23:37:14 +00:00
Rui Ueyama 7e75866c51 COFF: Rename non-noreturn error -> check.
The new name is consistent with ELF.

llvm-svn: 275499
2016-07-14 23:37:10 +00:00
Peter Collingbourne 765aa2d1c2 COFF: Update remaining #include paths.
llvm-svn: 275480
2016-07-14 21:30:37 +00:00
Lang Hames 622ef17f5d [lld] Update LLD for Archive::child_iterator change in LLVM r275361.
llvm-svn: 275362
2016-07-14 02:35:18 +00:00
Saleem Abdulrasool f27d4068a5 COFF: drop the dependency on LIB.EXE for implibs
lld currently relies on lib.exe in order to generate an empty import library.
The "empty" import library consists of 5 members:
  - first linker member
  - second linker member
  - Import Descriptor
  - NULL Import Descriptor
  - NULl Thunk

The first two entries (first and second linker members) are string tables which
are never updated.  Therefore, they may as well as not be present.  A subsequent
change to add that is probably warranted.  However, this does not prevent the
use of the linker.

The Import Descriptor is the content which is most important.  It provides an
Import Name Table entry for the library (as specified by the LIBRARY directive
in the DEF file).  Additionally, it contains undefined references to the NULL
Import Descriptor and the library NULL Thunk Data.  This ensures that the linker
will pull in the subsequent objects from the import library for the link.  The
Import Descriptor has a single symbol (__IMPORT_DESCRIPTOR_<Library>) which
contains 3 relocations, one to the INT (Import Name Table) entry, one to the ILT
(Import Lookup Table) entry, and one to the IAT (Import Address Table) entry.

The NULL Import Descriptor is the last import descriptor and terminates the
import descriptor array.  It contains a single symbol
(__NULL_IMPORT_DESCRIPTOR).

The NULL Thunk contains a single symbol (\x7f<Library>_NULL_THUNK_DATA) and
provides the terminator for the ILT and IAT.

These files are currently constructed manually following the example of the
Short Import Library format.  This is arguably less than ideal, and it may be
possible to use MCAssembler and feed it the fragments to construct the object.

The major difference between the LIB (LINK) generated objects and the ones
generated here is that they are all one section shorter (.debug$S) as they do
not contain the debug information and one symbol shorter (@comp.id) as they do
not contain the RICH signature.

Move the logic related to the librarian into a new source file (Librarian.cpp).

llvm-svn: 275242
2016-07-13 03:19:27 +00:00
Saleem Abdulrasool 0561bd5b47 COFF: remove unused function (touchFile)
Remove some dead code.  NFC.

llvm-svn: 274900
2016-07-08 18:36:56 +00:00
Peter Collingbourne 66ec178c6c Fix logic error in check() function.
llvm-svn: 274195
2016-06-30 00:32:24 +00:00
Peter Collingbourne eadba86c3e COFF: Switch to new archive writer interface (D21721).
Differential Revision: http://reviews.llvm.org/D21722

llvm-svn: 274184
2016-06-29 22:27:45 +00:00
Kevin Enderby b9e053cfd7 Matching change for lld for the llvm change of Archive::create() from ErrorOr<...> to Expected<...> in r274160.
llvm-svn: 274161
2016-06-29 20:36:11 +00:00
Rui Ueyama 440138c4c8 [COFF] Add /section command line flag.
llvm-svn: 273134
2016-06-20 03:39:39 +00:00
Benjamin Kramer bd521201b7 Apply clang-tidy's misc-move-constructor-init to lld.
No functionality change intended.

llvm-svn: 271686
2016-06-03 16:57:13 +00:00
Rafael Espindola a5cefffc33 Update for llvm change.
llvm-svn: 270907
2016-05-26 20:31:06 +00:00
Eugene Zelenko 1a299eab32 Fix Clang-tidy misc-unused-using-decls and Include What You Use warnings.
Differential revision: http://reviews.llvm.org/D19348

llvm-svn: 267008
2016-04-21 17:14:10 +00:00
Nico Weber a7a848f10d Revert unintentionally commited bits in r266935.
llvm-svn: 266942
2016-04-21 01:31:37 +00:00
Nico Weber 848334704d unbreak COFF/out.test after r266929
llvm-svn: 266935
2016-04-20 23:30:14 +00:00
Nico Weber 5660de7877 lld-link: Fix default output name with /dll flag.
If /dll is passed, the default output filename should be foo.dll,
not foo.exe.
http://reviews.llvm.org/D19321

llvm-svn: 266929
2016-04-20 22:34:15 +00:00
Duncan P. N. Exon Smith 28d8d04657 LTO: Adapt to LLVM API changes in r266713
llvm-svn: 266714
2016-04-19 04:57:40 +00:00
Rui Ueyama afb1901e42 COFF: Support /manifestinput command line option.
Manifest file is a separate or embedded XML file having metadata
of an executable. As it is XML, it can contain various types of
information. Probably the most popular one is to request escalated
priviledges.

Usually the linker creates an XML file and embed that file into
an executable. However, there's a way to supply an XML file from
command line. /manifestniput is it.

Apparently it is over-designed here, but if you supply two or more
manifest files, then the linker needs to merge the files into a
single XML file. A good news is that we don't need to do that ourselves.
MT.exe command can do that, so we call the command from the linker
in this patch.

llvm-svn: 266704
2016-04-19 01:21:58 +00:00
Duncan P. N. Exon Smith 2c66b23d79 LTO: Merge debug info types when linking bitcode
Make sure lld enables ODR type uniquing for debug info when invoking
LTO, as a follow-up to LLVM r266549.

llvm-svn: 266555
2016-04-17 07:35:38 +00:00
Rui Ueyama 34b60f1c40 Do not use llvm::getGlobalContext().
llvm-svn: 266375
2016-04-14 21:41:44 +00:00
Mehdi Amini 03a5042e4c Revert "Do not use llvm::getGlobalContext(), trying to nuke it from LLVM"
This reverts commit r266365 and r266367, the contexts in the two
places have to match.

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 266373
2016-04-14 21:31:46 +00:00
Mehdi Amini 9a15293ec1 Use fully qualified name to refer to LLVMContext
From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 266367
2016-04-14 21:09:10 +00:00
Mehdi Amini f1e7ff9d0e Do not use llvm::getGlobalContext(), trying to nuke it from LLVM
From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 266365
2016-04-14 20:53:39 +00:00
Davide Italiano 3774afba07 [COFF] Simplify the code leveraging implicit conversion.
Suggested by: David Blaikie!

llvm-svn: 266140
2016-04-12 22:05:38 +00:00
Davide Italiano eeae124faf [COFF] SmallVector<char, 0> -> SmallString<0>.
This way we're consistent between ELF and COFF.

llvm-svn: 265885
2016-04-09 23:00:31 +00:00
Kevin Enderby 439453679c Needed change to lld for the change to createBinary() now returning Expected<...>
With the llvm change in r265606 this is the matching needed change to the lld
code now that createBinary() is returning Expected<...> .

llvm-svn: 265607
2016-04-06 22:15:23 +00:00
Reid Kleckner 9cd77ce169 [coff] Accept and ignore another link.exe flag for compatibility
This flag disables link.exe's crash handler so that normal windows error
reporting and crash dumping occurs. For now it is reasonable for LLD to
ignore the flag.

Chromium is currently using this flag to collect minidumps of link.exe
crashing, and it breaks the LLD build.

llvm-svn: 264439
2016-03-25 18:09:29 +00:00
David Majnemer 08af4e56e1 [COFF] Don't call memcpy with a NULL argument
Some declarations of memcpy (like glibc's for example) are attributed
with notnull which makes it UB for NULL to get passed in, even if the
memcpy count is zero.

To account for this, guard the memcpy with an appropriate precondition.

This should fix the last UBSan bug, exposed by the test suite, in the
COFF linker.

llvm-svn: 263919
2016-03-20 23:10:12 +00:00
David Majnemer 2aa29ee7c1 [COFF] Remove undefined behavior from ObjectFile::createWeakExternal
LLD type-punned an integral type and a pointer type using a pointer
field.  This is problematic because the pointer type has alignment
greater than some of the integral values.

This would be less problematic if a union was used but it turns out the
integral values are only present for a short, transient, amount of time.

Let's remove this undefined behavior by skipping the punning altogether
by storing the state in a separate memory location: a vector which
informs us which symbols to process for weak externs.

llvm-svn: 263918
2016-03-20 22:56:31 +00:00
David Majnemer 93bbc7cd66 [COFF] Use coff_section::getAlignment
Use LLVM's section alignment calculation instead of having LLD calculate
it.

llvm-svn: 263724
2016-03-17 16:58:08 +00:00
David Majnemer 272de1e4d1 [COFF] Don't trust a symbol's section number
This fixes a test which exposed an ASan issue.

We assumed that a symbol's section number had a corresponding section
without performing validation.

llvm-svn: 263558
2016-03-15 16:47:28 +00:00
David Majnemer 22dff0aafc [COFF] Don't hard-code the load configuration size
The load configuration directory is a structure whose size varies as the
OS gains additional functionality.  To account for this, the structure's
layout begins with a size field; this allows loaders to know which
fields are available.

However, LLD hard-coded the sizes (112 bytes for 64-bit and 64 for
32-bit).  This means that we might not inform the loader of all the
pertinent fields or we might claim that there are more fields than are
actually present.

To correctly account for this, the size field must be loaded from the
_load_config_used symbol.

N.B.  The COFF spec is either wrong or out of date, the load
configuration directory is not correctly documented in the
specification: it omits the size field.

llvm-svn: 263543
2016-03-15 09:48:27 +00:00
David Majnemer 1706719972 [COFF] Remove an unused function, getFileOff
The function was not used and was not functional: all paths would lead
to report_fatal_error or endless stack recursion.

llvm-svn: 263542
2016-03-15 09:48:18 +00:00
David Majnemer 22a19a9ace [COFF] Use the correct size of the TLS directory
The TLS directory has a different layout depending on the bitness of the
machine the image will run on.  LLD would always use the 64-bit TLS
directory for the data directory entry instead of an appropriately sized
TLS directory.

llvm-svn: 263539
2016-03-15 06:41:02 +00:00
Rui Ueyama 02aa766897 Update the documents of the new LLD.
This patch merges the documents for ELF and COFF into one
and puts it into docs directory.

llvm-svn: 263336
2016-03-12 06:06:40 +00:00
Rui Ueyama a453c0a5ad Merge DarwinLdDriver and Driver.
Now that DarwinLdDriver is the only derived class of Driver.
This patch merges them and actually removed the class because
they can now just be non-member functions. This change simplifies
a common header, Driver.h.

http://reviews.llvm.org/D17788

llvm-svn: 262502
2016-03-02 19:08:05 +00:00
Rafael Espindola 393877d51b Fix BUILD_SHARED_LIBS build.
llvm-svn: 262345
2016-03-01 15:56:53 +00:00
Rui Ueyama 417553d393 Make the entry point function calls consistent. NFC.
llvm-svn: 262191
2016-02-28 19:54:51 +00:00
Rui Ueyama 29d8eef440 Rename so that the function name is consistent between ELF and COFF.
llvm-svn: 261914
2016-02-25 18:49:11 +00:00
Rui Ueyama 489a806965 Update for LLVM function name change.
llvm-svn: 257801
2016-01-14 20:53:50 +00:00
Rui Ueyama 84425d7289 COFF: Implement DLL symbol forwarding.
DLL export tables usually contain dllexport'ed symbol RVAs so that
applications which use the DLLs can find symbols from the DLLs.
However, there's a minor feature to "forward" DLL symbols to other
DLLs.

If you set an RVA to a string whose form is "<dllname>.<symbolname>"
(e.g. "KERNEL32.ExitProcess") instead of symbol RVA to the export
table, the loader interprets that as a forwarder symbol, and resolve
that symbol from the specified DLL.

This patch implements that feature.

llvm-svn: 257243
2016-01-09 01:22:00 +00:00
Rui Ueyama dba6b576cf COFF: Rename RoundUpToAlignment -> align.
llvm-svn: 257220
2016-01-08 22:24:26 +00:00
Pete Cooper f154b678c6 Set the folder for libraries to 'lld libraries'. NFC.
In a UI such as XCode, LLVM source files are in 'libraries' while clang
files are in 'clang libraries'.

This change moves the lld source to 'lld libraries' to make code browsing easier.

It should be NFC as the build itself is still the same, just the structure in a
UI differs.

llvm-svn: 257001
2016-01-07 00:14:04 +00:00
Rui Ueyama 1763c0d3bc COFF: Create an empty but valid PDF file.
MSVC linker considers PDB files created with this patch valid.
So you don't have to remove PDB files created by lld before
running MSVC linker.

This patch has no test since llvm-pdbdump dislikes PDB files
with no metadata streams.

llvm-svn: 255039
2015-12-08 18:39:55 +00:00
Rui Ueyama e737824d8a COFF: Create a PDB file with the correct file signature.
Before this patch, we created an empty PDB file if /debug option is
specified. For MSVC linker, such PDB file is completely broken, and
linker exits without doing anything as soon as it finds an empty PDB
file.

A PDB file created in this patch has the correct file signature.
MSVC linker still thinks that the file is broken, but it then removes
and replaces with its output.

This is an initial patch to support PDB in LLD. We aim to support
PDB in order to make it 100% compatible with MSVC linker. PDB support
is the last missing piece.

llvm-svn: 254796
2015-12-04 23:11:05 +00:00
Rafael Espindola 3d49d7aa22 Update for llvm change.
llvm-svn: 254725
2015-12-04 16:22:09 +00:00
Rafael Espindola 35dad13714 Update for LLVM api change.
llvm-svn: 254697
2015-12-04 02:42:47 +00:00
Rui Ueyama 43e12900d9 COFF: Non-external COMDAT sections sholud not be merged by ICF.
If a section symbol is not external, that COMDAT section should never
be merge with other sections in other compilation unit. Previously,
we didn't take visibility into account.

Note that COMDAT sections with non-external visibility makes sense
because they can be removed by dead-stripping.

Fixes https://llvm.org/bugs/show_bug.cgi?id=25686

llvm-svn: 254578
2015-12-03 02:23:33 +00:00
Rui Ueyama df06d203e5 Update documents.
llvm-svn: 253728
2015-11-20 22:47:42 +00:00
Peter Collingbourne 70507e59fe COFF: Destroy LTOModules as they are linked.
This should help reduce memory consumption during LTO.

Differential Revision: http://reviews.llvm.org/D14672

llvm-svn: 253397
2015-11-17 23:30:59 +00:00
Yunzhong Gao fbee89263f Fixing build failures caused by r253367. Sorry for breaking the build.
llvm-svn: 253374
2015-11-17 20:48:12 +00:00
Rafael Espindola 7bcaec83be Fix a few windows only tests.
This argument must be non-null.

llvm-svn: 252336
2015-11-06 19:57:37 +00:00
Kevin Enderby 35dfc95efe These are the matching changes needed to the lld project for the changes to llvm
in r252192 that changed the Archive and Child interfaces in libObject. These include
Rafael Espindola’s many suggested updates.

llvm-svn: 252193
2015-11-05 19:25:47 +00:00
Rafael Espindola 543f29d1a9 Don't implicitly construct an Archive::child_iterator.
llvm-svn: 252166
2015-11-05 14:34:56 +00:00
Rui Ueyama df985afa14 COFF: De-parallelize ICF for now.
There was a threading issue in the ICF code for COFF. That seems like
a venign bug in the sense that it doesn't produce an incorrect output,
but it oftentimes misses reducible sections. As a result, mergeable
sections could remain in outputs, which makes the output nondeterministic.

Basically the algorithm we are using for ICF is this: We group sections
so that identical sections will eventually be in the same group. Initially,
all sections are in one group. We split the group by relocation targets
until we get a convergence (if relocation targets are in different gruops,
the sections are different). Once a group is split, they will never be
merged.

Each section has a group ID. That variable itself is atomic, so there's
no threading issue at the level that we can use thread sanitizer.
The point is, when we split a group, we re-assign new group IDs to group
of sections. That are multiple separate writes to atomic varaibles.
Thus, splitting a group is not an atomic operation, and there's a small
chance that the other thread observes inconsistent group IDs.

Over-splitting is always "safe", so it will never create incorrect output.

I suspect that the nondeterminism stems from that point. However, I
cannot prove or fix that at this moment, so I'm going to avoid using
threads here.

llvm-svn: 251300
2015-10-26 16:20:00 +00:00
Craig Topper f88d22970d Update lld to match llvm r250901. OptTable constructor now takes an ArrayRef. NFC
llvm-svn: 250904
2015-10-21 16:31:56 +00:00
Rui Ueyama 75656eebb8 COFF: /OPT should accept comma-separated multiple arguments.
/OPT:foo,bar is equivalent to /OPT:foo /OPT:bar.

Reported by alexchandel. https://llvm.org/bugs/show_bug.cgi?id=25228

llvm-svn: 250728
2015-10-19 19:40:43 +00:00
Rui Ueyama 43155d0d48 [LLD] Fix Clang-tidy modernize-use-nullptr warnings; other minor cleanups.
Patch from Eugene Zelenko!

llvm-svn: 249111
2015-10-02 00:36:00 +00:00
Rui Ueyama 548d22c073 COFF: ICF should not merge sectinos if their alignments are not the same.
There's actually a room to improve this patch. Instead of not merging
sections that have different alignements, we can choose the section that
has the largest alignment requirement among all sections that are otherwise
considered the same. Then all section alignments are satisfied, so we can
merge them.

I don't know if that improvement could make any difference for real-world
input, so I'll leave it alone. Would be interesting to revisit later.

llvm-svn: 248581
2015-09-25 16:50:12 +00:00
Rui Ueyama c9e746b9e6 COFF: Fix local varaible type.
This is intended to be 64-bit integer, but size_t is not guranteed
to be the same or larger type than uint64_t.

llvm-svn: 248580
2015-09-25 16:38:13 +00:00
Rui Ueyama de88072a00 COFF: Rename Ptr -> Repl.
This pointer points to a replacement for this chunk. Ptr was not a good name.

llvm-svn: 248579
2015-09-25 16:20:24 +00:00
Rui Ueyama c28a08b8d2 COFF: Remove duplicate parameter from hash value calculation.
llvm-svn: 248526
2015-09-24 19:00:42 +00:00
Rui Ueyama 9640173e16 COFF: Add /nosymtab command line option.
This is an LLD extension to MSVC link.exe command line. MSVC linker
does not write symbol tables for executables. We do unless no /debug
option is given.

There's a situation that we want to enable debug info but don't want
to emit the symbol table. One example is when we are comparing output
file size. With this patch, you can tell the linker to not create
a symbol table by just specifying /nosymtab.

llvm-svn: 248225
2015-09-21 23:43:31 +00:00
Rui Ueyama 97d92736f5 COFF: Improve section hash value.
std::distance(C->Relocs.end(), C->Relocs.begin()) is the same as NumRelocs
which is already added to the hash value. What we are missing here is the
section size.

llvm-svn: 248202
2015-09-21 19:41:38 +00:00
Rui Ueyama 3cb1f5c860 COFF: Rename A.replaceWith(B) -> B.replace(A). NFC.
llvm-svn: 248197
2015-09-21 19:36:51 +00:00
Rui Ueyama 98a98cffb6 COFF: Do not call std::async with std::launch::async if multithreading is disabled.
llvm-svn: 248193
2015-09-21 19:12:36 +00:00
Rui Ueyama 5f38915624 COFF: Fix ICF regression.
This patch fixes a regression introduced by r247964. Relocations that
are referring the same symbol should be considered equal, but they
were not if they were pointing to non-section chunks.

llvm-svn: 248132
2015-09-20 20:19:12 +00:00
Rui Ueyama 997b357ac1 COFF: Run InputFile::parse() in background using std::async().
Previously, InputFile::parse() was run in batch. We construct a list
of all input files and call parse() on each file using parallel_for_each.
That means we cannot start parsing files until we get a complete list
of input files, although InputFile::parse() is safe to call from anywhere.

This patch makes it asynchronous. As soon as we add a file to the symbol
table, we now start parsing the file using std::async().

This change shortens self-hosting time (650 ms) by 28 ms. It's about 4%
improvement.

llvm-svn: 248109
2015-09-20 03:11:16 +00:00
Rui Ueyama f49712a853 COFF: Fix race condition.
NextID is updated inside parallel_for_each, so it needs mutual exclusion.

llvm-svn: 248106
2015-09-20 01:44:44 +00:00
Rui Ueyama 3cfd2bff1e Remove dead code.
llvm-svn: 248105
2015-09-20 01:19:36 +00:00
Rui Ueyama 1cce300843 COFF: Change Symbol::Body type from atomic pointer to regular pointer.
I made the field an atomic pointer in hope that we would be able to
parallelize the symbol resolver soon, but that's not going to happen
soon. This patch reverts that change for the sake of readability.

llvm-svn: 248104
2015-09-20 00:00:05 +00:00