PC-relative memory operand could reference a different object from
the one located at the target address, e.g. when a negative offset
is used. Check relocations for the real referenced object.
Reviewed By: rafauler
Differential Revision: https://reviews.llvm.org/D120379
Further improve error handling in BOLT by reporting `RewriteInstance` errors in
a library and fuzzer-friendly way instead of exiting.
Follow-up to D119658
Reviewed By: rafauler
Differential Revision: https://reviews.llvm.org/D120224
Fix data race reported by ThreadSanitizer in clang.test:
```
ThreadSanitizer: data race /data/llvm-project/bolt/lib/Passes/ShrinkWrapping.cpp:1359:28
in llvm::bolt::ShrinkWrapping::moveSaveRestores()
```
The issue is with incrementing global counters from multiple threads.
Reviewed By: yota9
Differential Revision: https://reviews.llvm.org/D120218
Refactor createBinaryContext and RewriteInstance/MachORewriteInstance
constructors to report an error in a library and fuzzer-friendly way instead of
returning a nullptr or exiting.
Reviewed By: rafauler
Differential Revision: https://reviews.llvm.org/D119658
This patch changes patchELFAllocatableRelaSections from going through
old relocations sections and update the relocation offsets to emitting
the relocations stored in binary sections. This is needed in case we
would like to remove and add dynamic relocations during BOLT work and it
is used by golang support pass. Note: Currently we emit relocations in
the old sections, so the total number of them should be equal or less
of old number.
Testing: No special tests are neeeded, since this patch does not fix
anything or add new functionality (it only prepares to add). Every
PIC-compiled test binary will use this code and thus become a test.
But just in case the aarch64 dynamic relocations tests were added.
Vladislav Khmelevsky,
Advanced Software Technology Lab, Huawei
Reviewed By: maksfb
Differential Revision: https://reviews.llvm.org/D117612
Added ability to append new entries to DIE. This is useful to standadize DWARF4
Split Dwarf, and simplify implementation of DWARF5.
Multiple DIEs can share an abbrev. So currently limitation is that only unique
Attributes can be added.
Reviewed By: maksfb
Differential Revision: https://reviews.llvm.org/D119577
After "Remove caching of ranges/abbrevs" patch the dwarf offsets are a
bit changed and the subprograms high pc is replaced with AT_RANGES.
Reviewed By: rafauler
Differential Revision: https://reviews.llvm.org/D119733
As usual with that header cleanup series, some implicit dependencies now need to
be explicit:
llvm/DebugInfo/DWARF/DWARFContext.h no longer includes:
- "llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h"
- "llvm/DebugInfo/DWARF/DWARFCompileUnit.h"
- "llvm/DebugInfo/DWARF/DWARFDebugAbbrev.h"
- "llvm/DebugInfo/DWARF/DWARFDebugAranges.h"
- "llvm/DebugInfo/DWARF/DWARFDebugFrame.h"
- "llvm/DebugInfo/DWARF/DWARFDebugLoc.h"
- "llvm/DebugInfo/DWARF/DWARFDebugMacro.h"
- "llvm/DebugInfo/DWARF/DWARFGdbIndex.h"
- "llvm/DebugInfo/DWARF/DWARFSection.h"
- "llvm/DebugInfo/DWARF/DWARFTypeUnit.h"
- "llvm/DebugInfo/DWARF/DWARFUnitIndex.h"
Plus llvm/Support/Errc.h not included by a bunch of llvm/DebugInfo/DWARF/DWARF*.h files
Preprocessed lines to build llvm on my setup:
after: 1065629059
before: 1066621848
Which is a great diff!
Discourse thread: https://discourse.llvm.org/t/include-what-you-use-include-cleanup
Differential Revision: https://reviews.llvm.org/D119723
When a jump table is recovered in postProcessIndirectBranches(),
successors for the containing basic block are added in random order.
Make the order deterministic.
Reviewed By: yota9
Differential Revision: https://reviews.llvm.org/D119672
Most notably,
llvm/Object/Binary.h no longer includes llvm/Support/MemoryBuffer.h
llvm/Object/MachOUniversal*.h no longer include llvm/Object/Archive.h
llvm/Object/TapiUniversal.h no longer includes llvm/Object/TapiFile.h
llvm-project preprocessed size:
before: 1068185081
after: 1068324320
Discourse thread: https://discourse.llvm.org/t/include-what-you-use-include-cleanup
Differential Revision: https://reviews.llvm.org/D119457
We are moving away from building the runtimes with LLVM_ENABLE_PROJECTS,
however the documentation was largely outdated. This commit updates all
the documentation I could find to use LLVM_ENABLE_RUNTIMES instead of
LLVM_ENABLE_PROJECTS for building runtimes.
Note that in the near future, libcxx, libcxxabi and libunwind will stop
supporting being built with LLVM_ENABLE_PROJECTS altogether. I don't know
what the plans are for other runtimes like libc, openmp and compiler-rt,
so I didn't make any changes to the documentation that would imply
something for those projects.
Once this lands, I will also cherry-pick this on the release/14.x branch
to make sure that LLVM's documentation is up-to-date and reflects what
we intend to support in the future.
Differential Revision: https://reviews.llvm.org/D119351
Removing caching of ranges/abbrevs to simplify the code.
Before we were doing it to get around a gdb limitation.
FBD34015613
Reviewed By: Amir, maksfb
Differential Revision: https://reviews.llvm.org/D119276
Add the script to set up llvm-bolt-wrapper. The intended use is to run NFC
checks manually and automatically on a buildbot.
Reviewed By: rafauler
Differential Revision: https://reviews.llvm.org/D118516
Summary:
- variable 'TotalSize' set but not used
- variable 'TotalCallsTopN' set but not used
- use of bitwise '|' with boolean operands
Reviewed By: maksfb
FBD33911129
clang-10 complains about changed section flags in two tests:
- X86/shrinkwrapping.test
- X86/exceptions-args.test
Fix that by adding the missing flags.
Reviewed By: yota9
Differential Revision: https://reviews.llvm.org/D119014
Only enable --emit-relocs linker option for merge-fdata target if tests are enabled.
Reviewed By: maksfb
Differential Revision: https://reviews.llvm.org/D118580
We can have a scenario where multiple CUs share an abbrev table.
We modify or don't modify one CU, which leads to other CUs having invalid abbrev section.
Example that caused it.
All of CUs shared the same abbrev table. First CU just had compile_unit and sub_program.
It was not modified. Next CU had DW_TAG_lexical_block with
DW_AT_low_pc/DW_AT_high_pc converted to DW_AT_low_pc/DW_AT_ranges.
We used unmodified abbrev section for first and subsequent CUs.
So when parsing subsequent CUs debug info was corrupted.
In this patch we will now duplicate all sections that are modified and are different.
This also means that if .debug_types is present and it shares Abbrev table, and
they usually are, we now can have two Abbrev tables. One for CU that was modified,
and unmodified one for TU.
Reviewed By: maksfb
Differential Revision: https://reviews.llvm.org/D118517
Commit history in chronological order:
[BOLT] llvm-bolt-wrapper: added wrapper for bolt binary matching
Summary:
Wrapper to compare two versions of BOLT to see if they produce the same output
binary given the same input.
(cherry picked from FBD26626137)
[BOLT] llvm-bolt-wrapper: support for no-output tests and heatmap mode
Summary:
- Added an option `skip_binary_cmp` to support invocations that don't output
a binary
- Minor fixes for heatmap mode, timeout, log comparison
- Rearranged in-line config example to be copy-pasteable
(cherry picked from FBD26822016)
[BOLT] llvm-bolt-wrapper: merge stdout/stderr, search for config in script dir
(cherry picked from FBD27529335)
[BOLT] llvm-bolt-wrapper: handle /dev/null
Summary:
Fixed the wrapper to preserve `-o /dev/null` and skip binary matching for such
invocations.
(cherry picked from FBD28013747)
[BOLT] llvm-bolt-wrapper: handle cases where output binary doesn't exist
Summary:
Handle invocations where output binary is not generated (e.g. due to an expected
assertion or exit with BOLT-ERROR) and skip binary comparison in such cases.
(cherry picked from FBD28080158)
[BOLT] llvm-bolt-wrapper: handle boltdiff mode
Summary:
Handle `llvm-boltdiff` invocation similarly to `perf2bolt`
(cherry picked from FBD28080157)
[BOLT] llvm-bolt-wrapper: find section with mismatch
Summary:
For mismatching ELF files, find section with mismatch and print sections table
with highlighted mismatch section.
(cherry picked from FBD28087231)
[BOLT] llvm-bolt-wrapper: ignore-build-id in perf2bolt mode
Summary:
When perf2bolt fails to match build-id from perf output for cmp binary, we need
to use -ignore-build-id option to override the strict checking behavior.
(cherry picked from FBD28087232)
[BOLT] llvm-bolt-wrapper: suppress -bolt-info=0 in heatmap mode
Summary:
Heatmap mode is incompatible with `-bolt-info=0` used to suppress binary
differences. Remove it.
(cherry picked from FBD28087230)
[BOLT] llvm-bolt-wrapper: add config-generator mode
Summary:
llvm-bolt-wrapper config can be generated by the script itself.
It makes the workflow more reliable compared to preparing the config manually.
(cherry picked from FBD28358939)
[BOLT] llvm-bolt-wrapper: fix mismatch reporting
Summary:
1. Fixed header comparison issue where headers were skipped due to
`skip_end == 0` (`lst[:-n]` does not work if n==0).
2. Detect color support while printing mismatching section:
- use bold color if terminal supports ANSI escape codes,
- otherwise print ">" at mismatching section.
3. Remove extra 0x before mismatching offset.
(cherry picked from FBD28691979)
[BOLT] llvm-bolt-wrapper: handle perf2bolt tests with ignore-build-id
Summary:
`ignore-build-id` must be passed not more than once. Account for that.
(cherry picked from FBD29830266)
[BOLT] llvm-bolt-wrapper: fix running subprocesses in parallel
Summary:
The commands were running sequentially due to the use of blocking `communicate`
call, which is needed when stdout/stderr are directed to a pipe.
Fix this behavior by directing the output to a file.
(cherry picked from FBD29951863)
The aarch64 platform has special registers like X0_X1_X2_X3_X4_X5_X6_X7.
Using the downwards propagation this register will become a super
register for all X0..X7 and its super registers which is not right. This
patch replaces the downwards propagation with caching all the aliases using MCRegAliasIterator.
Vladislav Khmelevsky,
Advanced Software Technology Lab, Huawei
Reviewed By: maksfb
Differential Revision: https://reviews.llvm.org/D117394
Since we now re-write .debug_info the DWARF CU Offsets can change.
Just like for .debug_aranges the GDB Index will need to be updated.
Reviewed By: Amir, maksfb
Differential Revision: https://reviews.llvm.org/D118273
This patch reverts patch "DWARFv5 default: Switch bolt tests to use
DWARFv4 since Bolt doesn't support v5 yet" and places the -gdwarf-4 flag
to the global cflags config file.
Reviewed By: Amir
Differential Revision: https://reviews.llvm.org/D118283
This patch adds unit testing support for BOLT. In order to do this we will need at least do this changes on the code level:
* Make createMCPlusBuilder accessible externally
* Remove positional InputFilename argument to bolt utlity sources
And prepare the cmake and lit for the new tests.
Vladislav Khmelevsky,
Advanced Software Technology Lab, Huawei
Reviewed By: maksfb, Amir
Differential Revision: https://reviews.llvm.org/D118271
<memory> is no longer included as a result of 5f290c090a
("Move STLFunctionalExtras out of STLExtras").
Reviewed By: maksfb
Differential Revision: https://reviews.llvm.org/D118064
This patch fixes the removal of unreachable uncondtional branch located
after return instruction.
Vladislav Khmelevsky,
Advanced Software Technology Lab, Huawei
Reviewed By: Amir
Differential Revision: https://reviews.llvm.org/D117677
Maksim Panchenko