Chris Lattner | 2eff505 | 2010-03-12 18:44:54 +0000 | [diff] [blame] | 1 | //===-- LTOModule.cpp - LLVM Link Time Optimizer --------------------------===// |
Nick Kledzik | 07b4a62 | 2008-02-26 20:26:43 +0000 | [diff] [blame] | 2 | // |
Chandler Carruth | 2946cd7 | 2019-01-19 08:50:56 +0000 | [diff] [blame] | 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 6 | // |
Nick Kledzik | 07b4a62 | 2008-02-26 20:26:43 +0000 | [diff] [blame] | 7 | //===----------------------------------------------------------------------===// |
| 8 | // |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 9 | // This file implements the Link Time Optimization library. This library is |
Nick Kledzik | 07b4a62 | 2008-02-26 20:26:43 +0000 | [diff] [blame] | 10 | // intended to be used by linker to optimize code at link time. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
Peter Collingbourne | 5c73220 | 2016-07-14 21:21:16 +0000 | [diff] [blame] | 14 | #include "llvm/LTO/legacy/LTOModule.h" |
Chandler Carruth | 4d88a1c | 2012-12-04 10:44:52 +0000 | [diff] [blame] | 15 | #include "llvm/ADT/Triple.h" |
Teresa Johnson | ad17679 | 2016-11-11 05:34:58 +0000 | [diff] [blame] | 16 | #include "llvm/Bitcode/BitcodeReader.h" |
David Blaikie | b3bde2e | 2017-11-17 01:07:10 +0000 | [diff] [blame] | 17 | #include "llvm/CodeGen/TargetSubtargetInfo.h" |
Chandler Carruth | 9fb823b | 2013-01-02 11:36:10 +0000 | [diff] [blame] | 18 | #include "llvm/IR/Constants.h" |
| 19 | #include "llvm/IR/LLVMContext.h" |
Peter Collingbourne | c66018e | 2017-03-31 04:46:50 +0000 | [diff] [blame] | 20 | #include "llvm/IR/Mangler.h" |
Yunzhong Gao | a88d7ab | 2014-01-21 18:31:27 +0000 | [diff] [blame] | 21 | #include "llvm/IR/Metadata.h" |
Chandler Carruth | 9fb823b | 2013-01-02 11:36:10 +0000 | [diff] [blame] | 22 | #include "llvm/IR/Module.h" |
Rafael Espindola | 1e49a6d | 2011-03-02 04:14:42 +0000 | [diff] [blame] | 23 | #include "llvm/MC/MCExpr.h" |
| 24 | #include "llvm/MC/MCInst.h" |
Chandler Carruth | 4d88a1c | 2012-12-04 10:44:52 +0000 | [diff] [blame] | 25 | #include "llvm/MC/MCParser/MCAsmParser.h" |
Rafael Espindola | 20fcda7 | 2014-01-22 22:11:14 +0000 | [diff] [blame] | 26 | #include "llvm/MC/MCSection.h" |
Evan Cheng | 91111d2 | 2011-07-09 05:47:46 +0000 | [diff] [blame] | 27 | #include "llvm/MC/MCSubtargetInfo.h" |
Rafael Espindola | 1e49a6d | 2011-03-02 04:14:42 +0000 | [diff] [blame] | 28 | #include "llvm/MC/MCSymbol.h" |
Bill Wendling | 8f6c8a9 | 2012-03-30 23:26:06 +0000 | [diff] [blame] | 29 | #include "llvm/MC/SubtargetFeature.h" |
Reid Kleckner | 89b5706 | 2021-10-08 10:48:15 -0700 | [diff] [blame] | 30 | #include "llvm/MC/TargetRegistry.h" |
Peter Collingbourne | 10039c0 | 2014-09-18 21:28:49 +0000 | [diff] [blame] | 31 | #include "llvm/Object/IRObjectFile.h" |
Francis Visoiu Mistrih | e551b73 | 2020-02-18 17:13:47 -0800 | [diff] [blame] | 32 | #include "llvm/Object/MachO.h" |
Peter Collingbourne | 10039c0 | 2014-09-18 21:28:49 +0000 | [diff] [blame] | 33 | #include "llvm/Object/ObjectFile.h" |
Rafael Espindola | 46ed353 | 2013-06-11 18:05:26 +0000 | [diff] [blame] | 34 | #include "llvm/Support/FileSystem.h" |
Chandler Carruth | 8a8cd2ba | 2014-01-07 11:48:04 +0000 | [diff] [blame] | 35 | #include "llvm/Support/Host.h" |
Bill Wendling | 8f6c8a9 | 2012-03-30 23:26:06 +0000 | [diff] [blame] | 36 | #include "llvm/Support/MemoryBuffer.h" |
| 37 | #include "llvm/Support/Path.h" |
Bill Wendling | 8f6c8a9 | 2012-03-30 23:26:06 +0000 | [diff] [blame] | 38 | #include "llvm/Support/SourceMgr.h" |
Bill Wendling | 8f6c8a9 | 2012-03-30 23:26:06 +0000 | [diff] [blame] | 39 | #include "llvm/Support/TargetSelect.h" |
David Blaikie | 6054e65 | 2018-03-23 23:58:19 +0000 | [diff] [blame] | 40 | #include "llvm/Target/TargetLoweringObjectFile.h" |
Rafael Espindola | 282a470 | 2013-10-31 20:51:58 +0000 | [diff] [blame] | 41 | #include "llvm/Transforms/Utils/GlobalStatus.h" |
Rafael Espindola | a6e9c3e | 2014-06-12 17:38:55 +0000 | [diff] [blame] | 42 | #include <system_error> |
Nick Kledzik | 07b4a62 | 2008-02-26 20:26:43 +0000 | [diff] [blame] | 43 | using namespace llvm; |
Peter Collingbourne | 10039c0 | 2014-09-18 21:28:49 +0000 | [diff] [blame] | 44 | using namespace llvm::object; |
Nick Kledzik | 07b4a62 | 2008-02-26 20:26:43 +0000 | [diff] [blame] | 45 | |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 46 | LTOModule::LTOModule(std::unique_ptr<Module> M, MemoryBufferRef MBRef, |
Rafael Espindola | dddd1fd | 2014-07-04 18:40:36 +0000 | [diff] [blame] | 47 | llvm::TargetMachine *TM) |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 48 | : Mod(std::move(M)), MBRef(MBRef), _target(TM) { |
Ella Ma | 1756d67 | 2020-11-21 21:04:12 -0800 | [diff] [blame] | 49 | assert(_target && "target machine is null"); |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 50 | SymTab.addModule(Mod.get()); |
| 51 | } |
Bill Wendling | fb44050 | 2012-03-28 20:46:54 +0000 | [diff] [blame] | 52 | |
Duncan P. N. Exon Smith | 97b4587 | 2014-11-11 23:08:05 +0000 | [diff] [blame] | 53 | LTOModule::~LTOModule() {} |
| 54 | |
Bill Wendling | fb44050 | 2012-03-28 20:46:54 +0000 | [diff] [blame] | 55 | /// isBitcodeFile - Returns 'true' if the file (or memory contents) is LLVM |
| 56 | /// bitcode. |
Peter Collingbourne | 10039c0 | 2014-09-18 21:28:49 +0000 | [diff] [blame] | 57 | bool LTOModule::isBitcodeFile(const void *Mem, size_t Length) { |
Rafael Espindola | 3500f5e | 2017-10-11 18:07:18 +0000 | [diff] [blame] | 58 | Expected<MemoryBufferRef> BCData = IRObjectFile::findBitcodeInMemBuffer( |
Peter Collingbourne | 10039c0 | 2014-09-18 21:28:49 +0000 | [diff] [blame] | 59 | MemoryBufferRef(StringRef((const char *)Mem, Length), "<mem>")); |
Nico Weber | 1c7c456 | 2018-01-23 19:03:13 +0000 | [diff] [blame] | 60 | return !errorToBool(BCData.takeError()); |
Nick Kledzik | 07b4a62 | 2008-02-26 20:26:43 +0000 | [diff] [blame] | 61 | } |
| 62 | |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 63 | bool LTOModule::isBitcodeFile(StringRef Path) { |
Peter Collingbourne | 10039c0 | 2014-09-18 21:28:49 +0000 | [diff] [blame] | 64 | ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr = |
| 65 | MemoryBuffer::getFile(Path); |
| 66 | if (!BufferOrErr) |
Rafael Espindola | 71affba | 2013-06-12 15:13:57 +0000 | [diff] [blame] | 67 | return false; |
Peter Collingbourne | 10039c0 | 2014-09-18 21:28:49 +0000 | [diff] [blame] | 68 | |
Rafael Espindola | 3500f5e | 2017-10-11 18:07:18 +0000 | [diff] [blame] | 69 | Expected<MemoryBufferRef> BCData = IRObjectFile::findBitcodeInMemBuffer( |
Peter Collingbourne | 10039c0 | 2014-09-18 21:28:49 +0000 | [diff] [blame] | 70 | BufferOrErr.get()->getMemBufferRef()); |
Nico Weber | 1c7c456 | 2018-01-23 19:03:13 +0000 | [diff] [blame] | 71 | return !errorToBool(BCData.takeError()); |
Nick Kledzik | 07b4a62 | 2008-02-26 20:26:43 +0000 | [diff] [blame] | 72 | } |
| 73 | |
Mehdi Amini | 7c4a1a8 | 2016-03-09 01:37:22 +0000 | [diff] [blame] | 74 | bool LTOModule::isThinLTO() { |
Peter Collingbourne | dbd2fed | 2017-06-15 17:26:13 +0000 | [diff] [blame] | 75 | Expected<BitcodeLTOInfo> Result = getBitcodeLTOInfo(MBRef); |
Peter Collingbourne | cd513a4 | 2016-11-11 19:50:24 +0000 | [diff] [blame] | 76 | if (!Result) { |
Jonas Devlieghere | 45eb84f | 2018-11-11 01:46:03 +0000 | [diff] [blame] | 77 | logAllUnhandledErrors(Result.takeError(), errs()); |
Peter Collingbourne | cd513a4 | 2016-11-11 19:50:24 +0000 | [diff] [blame] | 78 | return false; |
| 79 | } |
Peter Collingbourne | dbd2fed | 2017-06-15 17:26:13 +0000 | [diff] [blame] | 80 | return Result->IsThinLTO; |
Mehdi Amini | 7c4a1a8 | 2016-03-09 01:37:22 +0000 | [diff] [blame] | 81 | } |
| 82 | |
Peter Collingbourne | 10039c0 | 2014-09-18 21:28:49 +0000 | [diff] [blame] | 83 | bool LTOModule::isBitcodeForTarget(MemoryBuffer *Buffer, |
| 84 | StringRef TriplePrefix) { |
Rafael Espindola | 3500f5e | 2017-10-11 18:07:18 +0000 | [diff] [blame] | 85 | Expected<MemoryBufferRef> BCOrErr = |
Peter Collingbourne | 10039c0 | 2014-09-18 21:28:49 +0000 | [diff] [blame] | 86 | IRObjectFile::findBitcodeInMemBuffer(Buffer->getMemBufferRef()); |
Nico Weber | 1c7c456 | 2018-01-23 19:03:13 +0000 | [diff] [blame] | 87 | if (errorToBool(BCOrErr.takeError())) |
Peter Collingbourne | 10039c0 | 2014-09-18 21:28:49 +0000 | [diff] [blame] | 88 | return false; |
Duncan P. N. Exon Smith | 97b4587 | 2014-11-11 23:08:05 +0000 | [diff] [blame] | 89 | LLVMContext Context; |
Peter Collingbourne | cd513a4 | 2016-11-11 19:50:24 +0000 | [diff] [blame] | 90 | ErrorOr<std::string> TripleOrErr = |
| 91 | expectedToErrorOrAndEmitErrors(Context, getBitcodeTargetTriple(*BCOrErr)); |
| 92 | if (!TripleOrErr) |
| 93 | return false; |
| 94 | return StringRef(*TripleOrErr).startswith(TriplePrefix); |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 95 | } |
| 96 | |
Mehdi Amini | 3383ccc | 2015-11-09 02:46:41 +0000 | [diff] [blame] | 97 | std::string LTOModule::getProducerString(MemoryBuffer *Buffer) { |
Rafael Espindola | 3500f5e | 2017-10-11 18:07:18 +0000 | [diff] [blame] | 98 | Expected<MemoryBufferRef> BCOrErr = |
Mehdi Amini | 3383ccc | 2015-11-09 02:46:41 +0000 | [diff] [blame] | 99 | IRObjectFile::findBitcodeInMemBuffer(Buffer->getMemBufferRef()); |
Nico Weber | 1c7c456 | 2018-01-23 19:03:13 +0000 | [diff] [blame] | 100 | if (errorToBool(BCOrErr.takeError())) |
Mehdi Amini | 3383ccc | 2015-11-09 02:46:41 +0000 | [diff] [blame] | 101 | return ""; |
| 102 | LLVMContext Context; |
Peter Collingbourne | cd513a4 | 2016-11-11 19:50:24 +0000 | [diff] [blame] | 103 | ErrorOr<std::string> ProducerOrErr = expectedToErrorOrAndEmitErrors( |
| 104 | Context, getBitcodeProducerString(*BCOrErr)); |
| 105 | if (!ProducerOrErr) |
| 106 | return ""; |
| 107 | return *ProducerOrErr; |
Mehdi Amini | 3383ccc | 2015-11-09 02:46:41 +0000 | [diff] [blame] | 108 | } |
| 109 | |
Rafael Espindola | a7612b4 | 2015-12-04 16:14:31 +0000 | [diff] [blame] | 110 | ErrorOr<std::unique_ptr<LTOModule>> |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 111 | LTOModule::createFromFile(LLVMContext &Context, StringRef path, |
Benjamin Kramer | c321e53 | 2016-06-08 19:09:22 +0000 | [diff] [blame] | 112 | const TargetOptions &options) { |
Rafael Espindola | adf21f2 | 2014-07-06 17:43:13 +0000 | [diff] [blame] | 113 | ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr = |
| 114 | MemoryBuffer::getFile(path); |
Petr Pavlu | eba3039 | 2016-01-20 09:03:42 +0000 | [diff] [blame] | 115 | if (std::error_code EC = BufferOrErr.getError()) { |
| 116 | Context.emitError(EC.message()); |
Rafael Espindola | a7612b4 | 2015-12-04 16:14:31 +0000 | [diff] [blame] | 117 | return EC; |
Petr Pavlu | eba3039 | 2016-01-20 09:03:42 +0000 | [diff] [blame] | 118 | } |
Rafael Espindola | 48af1c2 | 2014-08-19 18:44:46 +0000 | [diff] [blame] | 119 | std::unique_ptr<MemoryBuffer> Buffer = std::move(BufferOrErr.get()); |
Petr Pavlu | 7ad9ec9 | 2016-03-01 13:13:49 +0000 | [diff] [blame] | 120 | return makeLTOModule(Buffer->getMemBufferRef(), options, Context, |
| 121 | /* ShouldBeLazy*/ false); |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 122 | } |
| 123 | |
Rafael Espindola | a7612b4 | 2015-12-04 16:14:31 +0000 | [diff] [blame] | 124 | ErrorOr<std::unique_ptr<LTOModule>> |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 125 | LTOModule::createFromOpenFile(LLVMContext &Context, int fd, StringRef path, |
Benjamin Kramer | c321e53 | 2016-06-08 19:09:22 +0000 | [diff] [blame] | 126 | size_t size, const TargetOptions &options) { |
Rafael Espindola | a7612b4 | 2015-12-04 16:14:31 +0000 | [diff] [blame] | 127 | return createFromOpenFileSlice(Context, fd, path, size, 0, options); |
Rafael Espindola | b39c7c7 | 2011-03-17 00:36:11 +0000 | [diff] [blame] | 128 | } |
| 129 | |
Rafael Espindola | a7612b4 | 2015-12-04 16:14:31 +0000 | [diff] [blame] | 130 | ErrorOr<std::unique_ptr<LTOModule>> |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 131 | LTOModule::createFromOpenFileSlice(LLVMContext &Context, int fd, StringRef path, |
| 132 | size_t map_size, off_t offset, |
| 133 | const TargetOptions &options) { |
Rafael Espindola | adf21f2 | 2014-07-06 17:43:13 +0000 | [diff] [blame] | 134 | ErrorOr<std::unique_ptr<MemoryBuffer>> BufferOrErr = |
Reid Kleckner | cc418a3 | 2019-07-10 00:34:13 +0000 | [diff] [blame] | 135 | MemoryBuffer::getOpenFileSlice(sys::fs::convertFDToNativeFile(fd), path, |
| 136 | map_size, offset); |
Petr Pavlu | eba3039 | 2016-01-20 09:03:42 +0000 | [diff] [blame] | 137 | if (std::error_code EC = BufferOrErr.getError()) { |
| 138 | Context.emitError(EC.message()); |
Rafael Espindola | a7612b4 | 2015-12-04 16:14:31 +0000 | [diff] [blame] | 139 | return EC; |
Petr Pavlu | eba3039 | 2016-01-20 09:03:42 +0000 | [diff] [blame] | 140 | } |
Rafael Espindola | 48af1c2 | 2014-08-19 18:44:46 +0000 | [diff] [blame] | 141 | std::unique_ptr<MemoryBuffer> Buffer = std::move(BufferOrErr.get()); |
Petr Pavlu | 7ad9ec9 | 2016-03-01 13:13:49 +0000 | [diff] [blame] | 142 | return makeLTOModule(Buffer->getMemBufferRef(), options, Context, |
| 143 | /* ShouldBeLazy */ false); |
Rafael Espindola | 56e41f7 | 2011-02-08 22:40:47 +0000 | [diff] [blame] | 144 | } |
| 145 | |
Rafael Espindola | a7612b4 | 2015-12-04 16:14:31 +0000 | [diff] [blame] | 146 | ErrorOr<std::unique_ptr<LTOModule>> |
| 147 | LTOModule::createFromBuffer(LLVMContext &Context, const void *mem, |
Benjamin Kramer | c321e53 | 2016-06-08 19:09:22 +0000 | [diff] [blame] | 148 | size_t length, const TargetOptions &options, |
Rafael Espindola | a7612b4 | 2015-12-04 16:14:31 +0000 | [diff] [blame] | 149 | StringRef path) { |
Aaron Ballman | 4749725 | 2014-08-20 12:54:13 +0000 | [diff] [blame] | 150 | StringRef Data((const char *)mem, length); |
Rafael Espindola | 48af1c2 | 2014-08-19 18:44:46 +0000 | [diff] [blame] | 151 | MemoryBufferRef Buffer(Data, path); |
Petr Pavlu | 7ad9ec9 | 2016-03-01 13:13:49 +0000 | [diff] [blame] | 152 | return makeLTOModule(Buffer, options, Context, /* ShouldBeLazy */ false); |
| 153 | } |
| 154 | |
| 155 | ErrorOr<std::unique_ptr<LTOModule>> |
| 156 | LTOModule::createInLocalContext(std::unique_ptr<LLVMContext> Context, |
| 157 | const void *mem, size_t length, |
Benjamin Kramer | c321e53 | 2016-06-08 19:09:22 +0000 | [diff] [blame] | 158 | const TargetOptions &options, StringRef path) { |
Petr Pavlu | 7ad9ec9 | 2016-03-01 13:13:49 +0000 | [diff] [blame] | 159 | StringRef Data((const char *)mem, length); |
| 160 | MemoryBufferRef Buffer(Data, path); |
| 161 | // If we own a context, we know this is being used only for symbol extraction, |
| 162 | // not linking. Be lazy in that case. |
| 163 | ErrorOr<std::unique_ptr<LTOModule>> Ret = |
| 164 | makeLTOModule(Buffer, options, *Context, /* ShouldBeLazy */ true); |
| 165 | if (Ret) |
| 166 | (*Ret)->OwnedContext = std::move(Context); |
David Blaikie | bcb1c7e | 2016-03-01 20:41:17 +0000 | [diff] [blame] | 167 | return Ret; |
Bill Wendling | b8dcda7 | 2012-08-06 21:34:54 +0000 | [diff] [blame] | 168 | } |
| 169 | |
Rafael Espindola | a7612b4 | 2015-12-04 16:14:31 +0000 | [diff] [blame] | 170 | static ErrorOr<std::unique_ptr<Module>> |
| 171 | parseBitcodeFileImpl(MemoryBufferRef Buffer, LLVMContext &Context, |
| 172 | bool ShouldBeLazy) { |
Duncan P. N. Exon Smith | 140d41b | 2014-12-17 22:05:42 +0000 | [diff] [blame] | 173 | // Find the buffer. |
Rafael Espindola | 3500f5e | 2017-10-11 18:07:18 +0000 | [diff] [blame] | 174 | Expected<MemoryBufferRef> MBOrErr = |
Duncan P. N. Exon Smith | 140d41b | 2014-12-17 22:05:42 +0000 | [diff] [blame] | 175 | IRObjectFile::findBitcodeInMemBuffer(Buffer); |
Rafael Espindola | 3500f5e | 2017-10-11 18:07:18 +0000 | [diff] [blame] | 176 | if (Error E = MBOrErr.takeError()) { |
| 177 | std::error_code EC = errorToErrorCode(std::move(E)); |
Petr Pavlu | eba3039 | 2016-01-20 09:03:42 +0000 | [diff] [blame] | 178 | Context.emitError(EC.message()); |
Rafael Espindola | a7612b4 | 2015-12-04 16:14:31 +0000 | [diff] [blame] | 179 | return EC; |
Petr Pavlu | eba3039 | 2016-01-20 09:03:42 +0000 | [diff] [blame] | 180 | } |
Rafael Espindola | d0b23be | 2015-01-10 00:07:30 +0000 | [diff] [blame] | 181 | |
| 182 | if (!ShouldBeLazy) { |
Duncan P. N. Exon Smith | 140d41b | 2014-12-17 22:05:42 +0000 | [diff] [blame] | 183 | // Parse the full file. |
Peter Collingbourne | d9445c4 | 2016-11-13 07:00:17 +0000 | [diff] [blame] | 184 | return expectedToErrorOrAndEmitErrors(Context, |
| 185 | parseBitcodeFile(*MBOrErr, Context)); |
Rafael Espindola | d0b23be | 2015-01-10 00:07:30 +0000 | [diff] [blame] | 186 | } |
Duncan P. N. Exon Smith | 140d41b | 2014-12-17 22:05:42 +0000 | [diff] [blame] | 187 | |
| 188 | // Parse lazily. |
Peter Collingbourne | d9445c4 | 2016-11-13 07:00:17 +0000 | [diff] [blame] | 189 | return expectedToErrorOrAndEmitErrors( |
| 190 | Context, |
| 191 | getLazyBitcodeModule(*MBOrErr, Context, true /*ShouldLazyLoadMetadata*/)); |
Duncan P. N. Exon Smith | 140d41b | 2014-12-17 22:05:42 +0000 | [diff] [blame] | 192 | } |
| 193 | |
Rafael Espindola | a7612b4 | 2015-12-04 16:14:31 +0000 | [diff] [blame] | 194 | ErrorOr<std::unique_ptr<LTOModule>> |
Benjamin Kramer | c321e53 | 2016-06-08 19:09:22 +0000 | [diff] [blame] | 195 | LTOModule::makeLTOModule(MemoryBufferRef Buffer, const TargetOptions &options, |
Petr Pavlu | 7ad9ec9 | 2016-03-01 13:13:49 +0000 | [diff] [blame] | 196 | LLVMContext &Context, bool ShouldBeLazy) { |
Rafael Espindola | a7612b4 | 2015-12-04 16:14:31 +0000 | [diff] [blame] | 197 | ErrorOr<std::unique_ptr<Module>> MOrErr = |
Petr Pavlu | 7ad9ec9 | 2016-03-01 13:13:49 +0000 | [diff] [blame] | 198 | parseBitcodeFileImpl(Buffer, Context, ShouldBeLazy); |
Rafael Espindola | a7612b4 | 2015-12-04 16:14:31 +0000 | [diff] [blame] | 199 | if (std::error_code EC = MOrErr.getError()) |
| 200 | return EC; |
| 201 | std::unique_ptr<Module> &M = *MOrErr; |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 202 | |
Rafael Espindola | dddd1fd | 2014-07-04 18:40:36 +0000 | [diff] [blame] | 203 | std::string TripleStr = M->getTargetTriple(); |
Bob Wilson | 3f7e7c0 | 2012-10-12 17:39:25 +0000 | [diff] [blame] | 204 | if (TripleStr.empty()) |
| 205 | TripleStr = sys::getDefaultTargetTriple(); |
| 206 | llvm::Triple Triple(TripleStr); |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 207 | |
| 208 | // find machine architecture for this module |
Rafael Espindola | a7612b4 | 2015-12-04 16:14:31 +0000 | [diff] [blame] | 209 | std::string errMsg; |
Bob Wilson | 3f7e7c0 | 2012-10-12 17:39:25 +0000 | [diff] [blame] | 210 | const Target *march = TargetRegistry::lookupTarget(TripleStr, errMsg); |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 211 | if (!march) |
Adam Nemet | ade40dd | 2018-03-13 04:37:01 +0000 | [diff] [blame] | 212 | return make_error_code(object::object_error::arch_not_found); |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 213 | |
Nick Lewycky | 364c04a | 2011-04-21 01:54:08 +0000 | [diff] [blame] | 214 | // construct LTOModule, hand over ownership of module and target |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 215 | SubtargetFeatures Features; |
Bob Wilson | 3f7e7c0 | 2012-10-12 17:39:25 +0000 | [diff] [blame] | 216 | Features.getDefaultSubtargetFeatures(Triple); |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 217 | std::string FeatureStr = Features.getString(); |
Bob Wilson | 3f7e7c0 | 2012-10-12 17:39:25 +0000 | [diff] [blame] | 218 | // Set a default CPU for Darwin triples. |
Evan Cheng | fe6e405 | 2011-06-30 01:53:36 +0000 | [diff] [blame] | 219 | std::string CPU; |
Bob Wilson | 3f7e7c0 | 2012-10-12 17:39:25 +0000 | [diff] [blame] | 220 | if (Triple.isOSDarwin()) { |
| 221 | if (Triple.getArch() == llvm::Triple::x86_64) |
| 222 | CPU = "core2"; |
| 223 | else if (Triple.getArch() == llvm::Triple::x86) |
| 224 | CPU = "yonah"; |
Ahmed Bougacha | f77c948 | 2020-09-03 08:43:21 -0700 | [diff] [blame] | 225 | else if (Triple.isArm64e()) |
| 226 | CPU = "apple-a12"; |
Tim Northover | f1c2892 | 2019-09-12 10:22:23 +0000 | [diff] [blame] | 227 | else if (Triple.getArch() == llvm::Triple::aarch64 || |
| 228 | Triple.getArch() == llvm::Triple::aarch64_32) |
Tim Northover | 00ed996 | 2014-03-29 10:18:08 +0000 | [diff] [blame] | 229 | CPU = "cyclone"; |
Bob Wilson | 3f7e7c0 | 2012-10-12 17:39:25 +0000 | [diff] [blame] | 230 | } |
Rafael Espindola | 0b385c7 | 2013-09-30 16:39:19 +0000 | [diff] [blame] | 231 | |
Rafael Espindola | 8c34dd8 | 2016-05-18 22:04:49 +0000 | [diff] [blame] | 232 | TargetMachine *target = |
| 233 | march->createTargetMachine(TripleStr, CPU, FeatureStr, options, None); |
Rafael Espindola | 282a470 | 2013-10-31 20:51:58 +0000 | [diff] [blame] | 234 | |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 235 | std::unique_ptr<LTOModule> Ret(new LTOModule(std::move(M), Buffer, target)); |
Rafael Espindola | a06bb16 | 2015-12-03 23:56:42 +0000 | [diff] [blame] | 236 | Ret->parseSymbols(); |
Yunzhong Gao | a88d7ab | 2014-01-21 18:31:27 +0000 | [diff] [blame] | 237 | Ret->parseMetadata(); |
| 238 | |
Bill Wendling | c55cf4a | 2020-02-10 07:06:45 -0800 | [diff] [blame] | 239 | return std::move(Ret); |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 240 | } |
| 241 | |
Manman Ren | 03456a1 | 2014-02-10 23:26:14 +0000 | [diff] [blame] | 242 | /// Create a MemoryBuffer from a memory range with an optional name. |
Rafael Espindola | a6d0b2f | 2014-08-17 22:37:39 +0000 | [diff] [blame] | 243 | std::unique_ptr<MemoryBuffer> |
| 244 | LTOModule::makeBuffer(const void *mem, size_t length, StringRef name) { |
Roman Divacky | ad06cee | 2012-09-05 22:26:57 +0000 | [diff] [blame] | 245 | const char *startPtr = (const char*)mem; |
Rafael Espindola | 3560ff2 | 2014-08-27 20:03:13 +0000 | [diff] [blame] | 246 | return MemoryBuffer::getMemBuffer(StringRef(startPtr, length), name, false); |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 247 | } |
| 248 | |
Bill Wendling | fb44050 | 2012-03-28 20:46:54 +0000 | [diff] [blame] | 249 | /// objcClassNameFromExpression - Get string that the data pointer points to. |
Rafael Espindola | 6ee19d2 | 2012-12-11 03:10:43 +0000 | [diff] [blame] | 250 | bool |
| 251 | LTOModule::objcClassNameFromExpression(const Constant *c, std::string &name) { |
| 252 | if (const ConstantExpr *ce = dyn_cast<ConstantExpr>(c)) { |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 253 | Constant *op = ce->getOperand(0); |
| 254 | if (GlobalVariable *gvn = dyn_cast<GlobalVariable>(op)) { |
| 255 | Constant *cn = gvn->getInitializer(); |
Chris Lattner | cf9e8f6 | 2012-02-05 02:29:43 +0000 | [diff] [blame] | 256 | if (ConstantDataArray *ca = dyn_cast<ConstantDataArray>(cn)) { |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 257 | if (ca->isCString()) { |
Yaron Keren | 075759a | 2015-03-30 15:42:36 +0000 | [diff] [blame] | 258 | name = (".objc_class_name_" + ca->getAsCString()).str(); |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 259 | return true; |
Nick Kledzik | b481c20 | 2009-06-01 20:33:09 +0000 | [diff] [blame] | 260 | } |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 261 | } |
Nick Kledzik | b481c20 | 2009-06-01 20:33:09 +0000 | [diff] [blame] | 262 | } |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 263 | } |
| 264 | return false; |
| 265 | } |
| 266 | |
Bill Wendling | fb44050 | 2012-03-28 20:46:54 +0000 | [diff] [blame] | 267 | /// addObjCClass - Parse i386/ppc ObjC class data structure. |
Rafael Espindola | 6ee19d2 | 2012-12-11 03:10:43 +0000 | [diff] [blame] | 268 | void LTOModule::addObjCClass(const GlobalVariable *clgv) { |
| 269 | const ConstantStruct *c = dyn_cast<ConstantStruct>(clgv->getInitializer()); |
Bill Wendling | 5f689e7 | 2011-11-04 18:48:00 +0000 | [diff] [blame] | 270 | if (!c) return; |
Nick Kledzik | b481c20 | 2009-06-01 20:33:09 +0000 | [diff] [blame] | 271 | |
Bill Wendling | 5f689e7 | 2011-11-04 18:48:00 +0000 | [diff] [blame] | 272 | // second slot in __OBJC,__class is pointer to superclass name |
| 273 | std::string superclassName; |
| 274 | if (objcClassNameFromExpression(c->getOperand(1), superclassName)) { |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 275 | auto IterBool = |
| 276 | _undefines.insert(std::make_pair(superclassName, NameAndAttributes())); |
| 277 | if (IterBool.second) { |
| 278 | NameAndAttributes &info = IterBool.first->second; |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 279 | info.name = IterBool.first->first(); |
Rafael Espindola | 477d11f | 2011-02-20 16:27:25 +0000 | [diff] [blame] | 280 | info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED; |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 281 | info.isFunction = false; |
| 282 | info.symbol = clgv; |
Nick Kledzik | b481c20 | 2009-06-01 20:33:09 +0000 | [diff] [blame] | 283 | } |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 284 | } |
Bill Wendling | 5f689e7 | 2011-11-04 18:48:00 +0000 | [diff] [blame] | 285 | |
| 286 | // third slot in __OBJC,__class is pointer to class name |
| 287 | std::string className; |
| 288 | if (objcClassNameFromExpression(c->getOperand(2), className)) { |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 289 | auto Iter = _defines.insert(className).first; |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 290 | |
Bill Wendling | 5f689e7 | 2011-11-04 18:48:00 +0000 | [diff] [blame] | 291 | NameAndAttributes info; |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 292 | info.name = Iter->first(); |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 293 | info.attributes = LTO_SYMBOL_PERMISSIONS_DATA | |
| 294 | LTO_SYMBOL_DEFINITION_REGULAR | LTO_SYMBOL_SCOPE_DEFAULT; |
| 295 | info.isFunction = false; |
| 296 | info.symbol = clgv; |
Bill Wendling | 5f689e7 | 2011-11-04 18:48:00 +0000 | [diff] [blame] | 297 | _symbols.push_back(info); |
| 298 | } |
| 299 | } |
| 300 | |
Bill Wendling | fb44050 | 2012-03-28 20:46:54 +0000 | [diff] [blame] | 301 | /// addObjCCategory - Parse i386/ppc ObjC category data structure. |
Rafael Espindola | 6ee19d2 | 2012-12-11 03:10:43 +0000 | [diff] [blame] | 302 | void LTOModule::addObjCCategory(const GlobalVariable *clgv) { |
| 303 | const ConstantStruct *c = dyn_cast<ConstantStruct>(clgv->getInitializer()); |
Bill Wendling | 5f689e7 | 2011-11-04 18:48:00 +0000 | [diff] [blame] | 304 | if (!c) return; |
| 305 | |
| 306 | // second slot in __OBJC,__category is pointer to target class name |
| 307 | std::string targetclassName; |
| 308 | if (!objcClassNameFromExpression(c->getOperand(1), targetclassName)) |
| 309 | return; |
| 310 | |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 311 | auto IterBool = |
| 312 | _undefines.insert(std::make_pair(targetclassName, NameAndAttributes())); |
Bill Wendling | 5f689e7 | 2011-11-04 18:48:00 +0000 | [diff] [blame] | 313 | |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 314 | if (!IterBool.second) |
Bill Wendling | 5f689e7 | 2011-11-04 18:48:00 +0000 | [diff] [blame] | 315 | return; |
| 316 | |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 317 | NameAndAttributes &info = IterBool.first->second; |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 318 | info.name = IterBool.first->first(); |
Bill Wendling | 5f689e7 | 2011-11-04 18:48:00 +0000 | [diff] [blame] | 319 | info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED; |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 320 | info.isFunction = false; |
| 321 | info.symbol = clgv; |
Nick Kledzik | b481c20 | 2009-06-01 20:33:09 +0000 | [diff] [blame] | 322 | } |
| 323 | |
Bill Wendling | fb44050 | 2012-03-28 20:46:54 +0000 | [diff] [blame] | 324 | /// addObjCClassRef - Parse i386/ppc ObjC class list data structure. |
Rafael Espindola | 6ee19d2 | 2012-12-11 03:10:43 +0000 | [diff] [blame] | 325 | void LTOModule::addObjCClassRef(const GlobalVariable *clgv) { |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 326 | std::string targetclassName; |
Bill Wendling | 5f689e7 | 2011-11-04 18:48:00 +0000 | [diff] [blame] | 327 | if (!objcClassNameFromExpression(clgv->getInitializer(), targetclassName)) |
| 328 | return; |
Rafael Espindola | 477d11f | 2011-02-20 16:27:25 +0000 | [diff] [blame] | 329 | |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 330 | auto IterBool = |
| 331 | _undefines.insert(std::make_pair(targetclassName, NameAndAttributes())); |
| 332 | |
| 333 | if (!IterBool.second) |
Bill Wendling | 5f689e7 | 2011-11-04 18:48:00 +0000 | [diff] [blame] | 334 | return; |
Rafael Espindola | 477d11f | 2011-02-20 16:27:25 +0000 | [diff] [blame] | 335 | |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 336 | NameAndAttributes &info = IterBool.first->second; |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 337 | info.name = IterBool.first->first(); |
Bill Wendling | 5f689e7 | 2011-11-04 18:48:00 +0000 | [diff] [blame] | 338 | info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED; |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 339 | info.isFunction = false; |
| 340 | info.symbol = clgv; |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 341 | } |
| 342 | |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 343 | void LTOModule::addDefinedDataSymbol(ModuleSymbolTable::Symbol Sym) { |
Rafael Espindola | 0972d41 | 2014-07-04 16:37:02 +0000 | [diff] [blame] | 344 | SmallString<64> Buffer; |
Rafael Espindola | dddd1fd | 2014-07-04 18:40:36 +0000 | [diff] [blame] | 345 | { |
| 346 | raw_svector_ostream OS(Buffer); |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 347 | SymTab.printSymbolName(OS, Sym); |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 348 | Buffer.c_str(); |
Rafael Espindola | dddd1fd | 2014-07-04 18:40:36 +0000 | [diff] [blame] | 349 | } |
| 350 | |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 351 | const GlobalValue *V = Sym.get<GlobalValue *>(); |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 352 | addDefinedDataSymbol(Buffer, V); |
Rafael Espindola | 0972d41 | 2014-07-04 16:37:02 +0000 | [diff] [blame] | 353 | } |
| 354 | |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 355 | void LTOModule::addDefinedDataSymbol(StringRef Name, const GlobalValue *v) { |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 356 | // Add to list of defined symbols. |
Rafael Espindola | 0972d41 | 2014-07-04 16:37:02 +0000 | [diff] [blame] | 357 | addDefinedSymbol(Name, v, false); |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 358 | |
Bill Wendling | 45f74e3 | 2012-08-06 22:52:45 +0000 | [diff] [blame] | 359 | if (!v->hasSection() /* || !isTargetDarwin */) |
| 360 | return; |
| 361 | |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 362 | // Special case i386/ppc ObjC data structures in magic sections: |
| 363 | // The issue is that the old ObjC object format did some strange |
| 364 | // contortions to avoid real linker symbols. For instance, the |
| 365 | // ObjC class data structure is allocated statically in the executable |
| 366 | // that defines that class. That data structures contains a pointer to |
| 367 | // its superclass. But instead of just initializing that part of the |
| 368 | // struct to the address of its superclass, and letting the static and |
| 369 | // dynamic linkers do the rest, the runtime works by having that field |
| 370 | // instead point to a C-string that is the name of the superclass. |
| 371 | // At runtime the objc initialization updates that pointer and sets |
| 372 | // it to point to the actual super class. As far as the linker |
| 373 | // knows it is just a pointer to a string. But then someone wanted the |
| 374 | // linker to issue errors at build time if the superclass was not found. |
| 375 | // So they figured out a way in mach-o object format to use an absolute |
| 376 | // symbols (.objc_class_name_Foo = 0) and a floating reference |
| 377 | // (.reference .objc_class_name_Bar) to cause the linker into erroring when |
| 378 | // a class was missing. |
| 379 | // The following synthesizes the implicit .objc_* symbols for the linker |
| 380 | // from the ObjC data structures generated by the front end. |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 381 | |
Bill Wendling | 45f74e3 | 2012-08-06 22:52:45 +0000 | [diff] [blame] | 382 | // special case if this data blob is an ObjC class definition |
Benjamin Kramer | 3afb173 | 2017-12-28 18:31:19 +0000 | [diff] [blame] | 383 | if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(v)) { |
| 384 | StringRef Section = GV->getSection(); |
| 385 | if (Section.startswith("__OBJC,__class,")) { |
| 386 | addObjCClass(GV); |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 387 | } |
| 388 | |
Benjamin Kramer | 3afb173 | 2017-12-28 18:31:19 +0000 | [diff] [blame] | 389 | // special case if this data blob is an ObjC category definition |
| 390 | else if (Section.startswith("__OBJC,__category,")) { |
| 391 | addObjCCategory(GV); |
Bill Wendling | 45f74e3 | 2012-08-06 22:52:45 +0000 | [diff] [blame] | 392 | } |
Bill Wendling | 45f74e3 | 2012-08-06 22:52:45 +0000 | [diff] [blame] | 393 | |
Benjamin Kramer | 3afb173 | 2017-12-28 18:31:19 +0000 | [diff] [blame] | 394 | // special case if this data blob is the list of referenced classes |
| 395 | else if (Section.startswith("__OBJC,__cls_refs,")) { |
| 396 | addObjCClassRef(GV); |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 397 | } |
| 398 | } |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 399 | } |
| 400 | |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 401 | void LTOModule::addDefinedFunctionSymbol(ModuleSymbolTable::Symbol Sym) { |
Rafael Espindola | 0972d41 | 2014-07-04 16:37:02 +0000 | [diff] [blame] | 402 | SmallString<64> Buffer; |
Rafael Espindola | dddd1fd | 2014-07-04 18:40:36 +0000 | [diff] [blame] | 403 | { |
| 404 | raw_svector_ostream OS(Buffer); |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 405 | SymTab.printSymbolName(OS, Sym); |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 406 | Buffer.c_str(); |
Rafael Espindola | dddd1fd | 2014-07-04 18:40:36 +0000 | [diff] [blame] | 407 | } |
| 408 | |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 409 | const Function *F = cast<Function>(Sym.get<GlobalValue *>()); |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 410 | addDefinedFunctionSymbol(Buffer, F); |
Rafael Espindola | 0972d41 | 2014-07-04 16:37:02 +0000 | [diff] [blame] | 411 | } |
| 412 | |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 413 | void LTOModule::addDefinedFunctionSymbol(StringRef Name, const Function *F) { |
Bill Wendling | fb44050 | 2012-03-28 20:46:54 +0000 | [diff] [blame] | 414 | // add to list of defined symbols |
Rafael Espindola | 0972d41 | 2014-07-04 16:37:02 +0000 | [diff] [blame] | 415 | addDefinedSymbol(Name, F, true); |
Bill Wendling | fb44050 | 2012-03-28 20:46:54 +0000 | [diff] [blame] | 416 | } |
| 417 | |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 418 | void LTOModule::addDefinedSymbol(StringRef Name, const GlobalValue *def, |
Rafael Espindola | 0972d41 | 2014-07-04 16:37:02 +0000 | [diff] [blame] | 419 | bool isFunction) { |
Eli Friedman | a2caa3b | 2020-05-18 20:38:13 -0700 | [diff] [blame] | 420 | const GlobalObject *go = dyn_cast<GlobalObject>(def); |
| 421 | uint32_t attr = go ? Log2(go->getAlign().valueOrOne()) : 0; |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 422 | |
| 423 | // set permissions part |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 424 | if (isFunction) { |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 425 | attr |= LTO_SYMBOL_PERMISSIONS_CODE; |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 426 | } else { |
Rafael Espindola | 6ee19d2 | 2012-12-11 03:10:43 +0000 | [diff] [blame] | 427 | const GlobalVariable *gv = dyn_cast<GlobalVariable>(def); |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 428 | if (gv && gv->isConstant()) |
| 429 | attr |= LTO_SYMBOL_PERMISSIONS_RODATA; |
| 430 | else |
| 431 | attr |= LTO_SYMBOL_PERMISSIONS_DATA; |
| 432 | } |
| 433 | |
| 434 | // set definition part |
Rafael Espindola | 2fb5bc3 | 2014-03-13 23:18:37 +0000 | [diff] [blame] | 435 | if (def->hasWeakLinkage() || def->hasLinkOnceLinkage()) |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 436 | attr |= LTO_SYMBOL_DEFINITION_WEAK; |
Bill Wendling | dcd7c2b | 2010-09-27 20:17:45 +0000 | [diff] [blame] | 437 | else if (def->hasCommonLinkage()) |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 438 | attr |= LTO_SYMBOL_DEFINITION_TENTATIVE; |
Bill Wendling | dcd7c2b | 2010-09-27 20:17:45 +0000 | [diff] [blame] | 439 | else |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 440 | attr |= LTO_SYMBOL_DEFINITION_REGULAR; |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 441 | |
| 442 | // set scope part |
Duncan P. N. Exon Smith | 87121f8 | 2014-05-07 22:53:14 +0000 | [diff] [blame] | 443 | if (def->hasLocalLinkage()) |
| 444 | // Ignore visibility if linkage is local. |
| 445 | attr |= LTO_SYMBOL_SCOPE_INTERNAL; |
| 446 | else if (def->hasHiddenVisibility()) |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 447 | attr |= LTO_SYMBOL_SCOPE_HIDDEN; |
| 448 | else if (def->hasProtectedVisibility()) |
| 449 | attr |= LTO_SYMBOL_SCOPE_PROTECTED; |
David Blaikie | 8820929 | 2018-03-21 19:23:45 +0000 | [diff] [blame] | 450 | else if (def->canBeOmittedFromSymbolTable()) |
Rafael Espindola | 282a470 | 2013-10-31 20:51:58 +0000 | [diff] [blame] | 451 | attr |= LTO_SYMBOL_SCOPE_DEFAULT_CAN_BE_HIDDEN; |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 452 | else |
Duncan P. N. Exon Smith | 87121f8 | 2014-05-07 22:53:14 +0000 | [diff] [blame] | 453 | attr |= LTO_SYMBOL_SCOPE_DEFAULT; |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 454 | |
Peter Collingbourne | 485ad48 | 2015-06-11 21:41:27 +0000 | [diff] [blame] | 455 | if (def->hasComdat()) |
| 456 | attr |= LTO_SYMBOL_COMDAT; |
| 457 | |
Peter Collingbourne | 17eff10 | 2015-07-04 03:42:35 +0000 | [diff] [blame] | 458 | if (isa<GlobalAlias>(def)) |
| 459 | attr |= LTO_SYMBOL_ALIAS; |
| 460 | |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 461 | auto Iter = _defines.insert(Name).first; |
Rafael Espindola | 477d11f | 2011-02-20 16:27:25 +0000 | [diff] [blame] | 462 | |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 463 | // fill information structure |
| 464 | NameAndAttributes info; |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 465 | StringRef NameRef = Iter->first(); |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 466 | info.name = NameRef; |
| 467 | assert(NameRef.data()[NameRef.size()] == '\0'); |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 468 | info.attributes = attr; |
| 469 | info.isFunction = isFunction; |
| 470 | info.symbol = def; |
| 471 | |
| 472 | // add to table of symbols |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 473 | _symbols.push_back(info); |
Nick Kledzik | 07b4a62 | 2008-02-26 20:26:43 +0000 | [diff] [blame] | 474 | } |
| 475 | |
Bill Wendling | fb44050 | 2012-03-28 20:46:54 +0000 | [diff] [blame] | 476 | /// addAsmGlobalSymbol - Add a global symbol from module-level ASM to the |
| 477 | /// defined list. |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 478 | void LTOModule::addAsmGlobalSymbol(StringRef name, |
Rafael Espindola | 1e49a6d | 2011-03-02 04:14:42 +0000 | [diff] [blame] | 479 | lto_symbol_attributes scope) { |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 480 | auto IterBool = _defines.insert(name); |
Rafael Espindola | 477d11f | 2011-02-20 16:27:25 +0000 | [diff] [blame] | 481 | |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 482 | // only add new define if not already defined |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 483 | if (!IterBool.second) |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 484 | return; |
| 485 | |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 486 | NameAndAttributes &info = _undefines[IterBool.first->first()]; |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 487 | |
Craig Topper | 2617dcc | 2014-04-15 06:32:26 +0000 | [diff] [blame] | 488 | if (info.symbol == nullptr) { |
Bill Wendling | 71b19bb | 2012-04-02 10:01:21 +0000 | [diff] [blame] | 489 | // FIXME: This is trying to take care of module ASM like this: |
| 490 | // |
| 491 | // module asm ".zerofill __FOO, __foo, _bar_baz_qux, 0" |
| 492 | // |
| 493 | // but is gross and its mother dresses it funny. Have the ASM parser give us |
| 494 | // more details for this type of situation so that we're not guessing so |
| 495 | // much. |
| 496 | |
| 497 | // fill information structure |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 498 | info.name = IterBool.first->first(); |
Bill Wendling | 71b19bb | 2012-04-02 10:01:21 +0000 | [diff] [blame] | 499 | info.attributes = |
| 500 | LTO_SYMBOL_PERMISSIONS_DATA | LTO_SYMBOL_DEFINITION_REGULAR | scope; |
| 501 | info.isFunction = false; |
Craig Topper | 2617dcc | 2014-04-15 06:32:26 +0000 | [diff] [blame] | 502 | info.symbol = nullptr; |
Bill Wendling | 71b19bb | 2012-04-02 10:01:21 +0000 | [diff] [blame] | 503 | |
| 504 | // add to table of symbols |
| 505 | _symbols.push_back(info); |
Bill Wendling | 3a0bcf0 | 2012-04-02 03:33:31 +0000 | [diff] [blame] | 506 | return; |
| 507 | } |
| 508 | |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 509 | if (info.isFunction) |
Rafael Espindola | 0972d41 | 2014-07-04 16:37:02 +0000 | [diff] [blame] | 510 | addDefinedFunctionSymbol(info.name, cast<Function>(info.symbol)); |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 511 | else |
Rafael Espindola | 0972d41 | 2014-07-04 16:37:02 +0000 | [diff] [blame] | 512 | addDefinedDataSymbol(info.name, info.symbol); |
Bill Wendling | 8f6c8a9 | 2012-03-30 23:26:06 +0000 | [diff] [blame] | 513 | |
| 514 | _symbols.back().attributes &= ~LTO_SYMBOL_SCOPE_MASK; |
| 515 | _symbols.back().attributes |= scope; |
Devang Patel | a59fe95 | 2008-07-16 18:06:52 +0000 | [diff] [blame] | 516 | } |
Nick Kledzik | 07b4a62 | 2008-02-26 20:26:43 +0000 | [diff] [blame] | 517 | |
Bill Wendling | fb44050 | 2012-03-28 20:46:54 +0000 | [diff] [blame] | 518 | /// addAsmGlobalSymbolUndef - Add a global symbol from module-level ASM to the |
| 519 | /// undefined list. |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 520 | void LTOModule::addAsmGlobalSymbolUndef(StringRef name) { |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 521 | auto IterBool = _undefines.insert(std::make_pair(name, NameAndAttributes())); |
Rafael Espindola | 1e49a6d | 2011-03-02 04:14:42 +0000 | [diff] [blame] | 522 | |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 523 | _asm_undefines.push_back(IterBool.first->first()); |
Rafael Espindola | 1e49a6d | 2011-03-02 04:14:42 +0000 | [diff] [blame] | 524 | |
| 525 | // we already have the symbol |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 526 | if (!IterBool.second) |
Rafael Espindola | 1e49a6d | 2011-03-02 04:14:42 +0000 | [diff] [blame] | 527 | return; |
| 528 | |
Alp Toker | 9844434 | 2014-04-19 23:56:35 +0000 | [diff] [blame] | 529 | uint32_t attr = LTO_SYMBOL_DEFINITION_UNDEFINED; |
Rafael Espindola | 1e49a6d | 2011-03-02 04:14:42 +0000 | [diff] [blame] | 530 | attr |= LTO_SYMBOL_SCOPE_DEFAULT; |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 531 | NameAndAttributes &info = IterBool.first->second; |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 532 | info.name = IterBool.first->first(); |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 533 | info.attributes = attr; |
| 534 | info.isFunction = false; |
Craig Topper | 2617dcc | 2014-04-15 06:32:26 +0000 | [diff] [blame] | 535 | info.symbol = nullptr; |
Rafael Espindola | 1e49a6d | 2011-03-02 04:14:42 +0000 | [diff] [blame] | 536 | } |
| 537 | |
Rafael Espindola | dddd1fd | 2014-07-04 18:40:36 +0000 | [diff] [blame] | 538 | /// Add a symbol which isn't defined just yet to a list to be resolved later. |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 539 | void LTOModule::addPotentialUndefinedSymbol(ModuleSymbolTable::Symbol Sym, |
Rafael Espindola | dddd1fd | 2014-07-04 18:40:36 +0000 | [diff] [blame] | 540 | bool isFunc) { |
Rafael Espindola | 34b5938 | 2011-02-11 05:23:09 +0000 | [diff] [blame] | 541 | SmallString<64> name; |
Rafael Espindola | dddd1fd | 2014-07-04 18:40:36 +0000 | [diff] [blame] | 542 | { |
| 543 | raw_svector_ostream OS(name); |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 544 | SymTab.printSymbolName(OS, Sym); |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 545 | name.c_str(); |
Rafael Espindola | dddd1fd | 2014-07-04 18:40:36 +0000 | [diff] [blame] | 546 | } |
Rafael Espindola | 5654852 | 2009-04-24 16:55:21 +0000 | [diff] [blame] | 547 | |
David Blaikie | 1def257 | 2021-07-08 13:30:14 -0700 | [diff] [blame] | 548 | auto IterBool = |
| 549 | _undefines.insert(std::make_pair(name.str(), NameAndAttributes())); |
Rafael Espindola | 477d11f | 2011-02-20 16:27:25 +0000 | [diff] [blame] | 550 | |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 551 | // we already have the symbol |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 552 | if (!IterBool.second) |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 553 | return; |
Rafael Espindola | 5654852 | 2009-04-24 16:55:21 +0000 | [diff] [blame] | 554 | |
David Blaikie | 5106ce7 | 2014-11-19 05:49:42 +0000 | [diff] [blame] | 555 | NameAndAttributes &info = IterBool.first->second; |
Rafael Espindola | 477d11f | 2011-02-20 16:27:25 +0000 | [diff] [blame] | 556 | |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 557 | info.name = IterBool.first->first(); |
Bill Wendling | fb44050 | 2012-03-28 20:46:54 +0000 | [diff] [blame] | 558 | |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 559 | const GlobalValue *decl = Sym.dyn_cast<GlobalValue *>(); |
Rafael Espindola | dddd1fd | 2014-07-04 18:40:36 +0000 | [diff] [blame] | 560 | |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 561 | if (decl->hasExternalWeakLinkage()) |
| 562 | info.attributes = LTO_SYMBOL_DEFINITION_WEAKUNDEF; |
| 563 | else |
| 564 | info.attributes = LTO_SYMBOL_DEFINITION_UNDEFINED; |
Rafael Espindola | 477d11f | 2011-02-20 16:27:25 +0000 | [diff] [blame] | 565 | |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 566 | info.isFunction = isFunc; |
| 567 | info.symbol = decl; |
Nick Kledzik | 07b4a62 | 2008-02-26 20:26:43 +0000 | [diff] [blame] | 568 | } |
| 569 | |
Rafael Espindola | a06bb16 | 2015-12-03 23:56:42 +0000 | [diff] [blame] | 570 | void LTOModule::parseSymbols() { |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 571 | for (auto Sym : SymTab.symbols()) { |
| 572 | auto *GV = Sym.dyn_cast<GlobalValue *>(); |
| 573 | uint32_t Flags = SymTab.getSymbolFlags(Sym); |
Rafael Espindola | 089a317 | 2014-07-04 19:31:27 +0000 | [diff] [blame] | 574 | if (Flags & object::BasicSymbolRef::SF_FormatSpecific) |
| 575 | continue; |
| 576 | |
Rafael Espindola | dddd1fd | 2014-07-04 18:40:36 +0000 | [diff] [blame] | 577 | bool IsUndefined = Flags & object::BasicSymbolRef::SF_Undefined; |
| 578 | |
| 579 | if (!GV) { |
| 580 | SmallString<64> Buffer; |
| 581 | { |
| 582 | raw_svector_ostream OS(Buffer); |
Peter Collingbourne | 77f4c30 | 2016-12-13 20:01:58 +0000 | [diff] [blame] | 583 | SymTab.printSymbolName(OS, Sym); |
Mehdi Amini | dc5a507 | 2016-10-07 19:05:14 +0000 | [diff] [blame] | 584 | Buffer.c_str(); |
Rafael Espindola | dddd1fd | 2014-07-04 18:40:36 +0000 | [diff] [blame] | 585 | } |
David Blaikie | 1def257 | 2021-07-08 13:30:14 -0700 | [diff] [blame] | 586 | StringRef Name = Buffer; |
Rafael Espindola | dddd1fd | 2014-07-04 18:40:36 +0000 | [diff] [blame] | 587 | |
| 588 | if (IsUndefined) |
| 589 | addAsmGlobalSymbolUndef(Name); |
| 590 | else if (Flags & object::BasicSymbolRef::SF_Global) |
| 591 | addAsmGlobalSymbol(Name, LTO_SYMBOL_SCOPE_DEFAULT); |
| 592 | else |
| 593 | addAsmGlobalSymbol(Name, LTO_SYMBOL_SCOPE_INTERNAL); |
| 594 | continue; |
| 595 | } |
| 596 | |
| 597 | auto *F = dyn_cast<Function>(GV); |
| 598 | if (IsUndefined) { |
| 599 | addPotentialUndefinedSymbol(Sym, F != nullptr); |
| 600 | continue; |
| 601 | } |
| 602 | |
| 603 | if (F) { |
| 604 | addDefinedFunctionSymbol(Sym); |
| 605 | continue; |
| 606 | } |
| 607 | |
| 608 | if (isa<GlobalVariable>(GV)) { |
| 609 | addDefinedDataSymbol(Sym); |
| 610 | continue; |
| 611 | } |
| 612 | |
| 613 | assert(isa<GlobalAlias>(GV)); |
| 614 | addDefinedDataSymbol(Sym); |
Daniel Dunbar | 919660b | 2010-08-10 23:46:46 +0000 | [diff] [blame] | 615 | } |
Nick Kledzik | 07b4a62 | 2008-02-26 20:26:43 +0000 | [diff] [blame] | 616 | |
Daniel Dunbar | 919660b | 2010-08-10 23:46:46 +0000 | [diff] [blame] | 617 | // make symbols for all undefines |
Bill Wendling | 9ee2d33 | 2012-03-29 08:27:32 +0000 | [diff] [blame] | 618 | for (StringMap<NameAndAttributes>::iterator u =_undefines.begin(), |
| 619 | e = _undefines.end(); u != e; ++u) { |
| 620 | // If this symbol also has a definition, then don't make an undefine because |
| 621 | // it is a tentative definition. |
| 622 | if (_defines.count(u->getKey())) continue; |
| 623 | NameAndAttributes info = u->getValue(); |
| 624 | _symbols.push_back(info); |
Daniel Dunbar | 5657e7b | 2010-08-10 23:46:39 +0000 | [diff] [blame] | 625 | } |
Nick Kledzik | 91a6dcf | 2008-02-27 22:25:36 +0000 | [diff] [blame] | 626 | } |
Yunzhong Gao | a88d7ab | 2014-01-21 18:31:27 +0000 | [diff] [blame] | 627 | |
| 628 | /// parseMetadata - Parse metadata from the module |
| 629 | void LTOModule::parseMetadata() { |
Peter Collingbourne | aef3659 | 2015-06-29 22:04:09 +0000 | [diff] [blame] | 630 | raw_string_ostream OS(LinkerOpts); |
| 631 | |
Yunzhong Gao | a88d7ab | 2014-01-21 18:31:27 +0000 | [diff] [blame] | 632 | // Linker Options |
Peter Collingbourne | 89061b2 | 2017-06-12 20:10:48 +0000 | [diff] [blame] | 633 | if (NamedMDNode *LinkerOptions = |
| 634 | getModule().getNamedMetadata("llvm.linker.options")) { |
Yunzhong Gao | a88d7ab | 2014-01-21 18:31:27 +0000 | [diff] [blame] | 635 | for (unsigned i = 0, e = LinkerOptions->getNumOperands(); i != e; ++i) { |
Peter Collingbourne | 89061b2 | 2017-06-12 20:10:48 +0000 | [diff] [blame] | 636 | MDNode *MDOptions = LinkerOptions->getOperand(i); |
Yunzhong Gao | a88d7ab | 2014-01-21 18:31:27 +0000 | [diff] [blame] | 637 | for (unsigned ii = 0, ie = MDOptions->getNumOperands(); ii != ie; ++ii) { |
| 638 | MDString *MDOption = cast<MDString>(MDOptions->getOperand(ii)); |
Peter Collingbourne | aef3659 | 2015-06-29 22:04:09 +0000 | [diff] [blame] | 639 | OS << " " << MDOption->getString(); |
Yunzhong Gao | a88d7ab | 2014-01-21 18:31:27 +0000 | [diff] [blame] | 640 | } |
| 641 | } |
| 642 | } |
| 643 | |
Bob Haarman | e2fe59f | 2017-02-04 01:28:44 +0000 | [diff] [blame] | 644 | // Globals - we only need to do this for COFF. |
| 645 | const Triple TT(_target->getTargetTriple()); |
| 646 | if (!TT.isOSBinFormatCOFF()) |
| 647 | return; |
| 648 | Mangler M; |
Peter Collingbourne | aef3659 | 2015-06-29 22:04:09 +0000 | [diff] [blame] | 649 | for (const NameAndAttributes &Sym : _symbols) { |
| 650 | if (!Sym.symbol) |
| 651 | continue; |
Bob Haarman | e2fe59f | 2017-02-04 01:28:44 +0000 | [diff] [blame] | 652 | emitLinkerFlagsForGlobalCOFF(OS, Sym.symbol, TT, M); |
Peter Collingbourne | aef3659 | 2015-06-29 22:04:09 +0000 | [diff] [blame] | 653 | } |
Ben Dunbobbin | 564d248 | 2019-06-12 11:07:56 +0000 | [diff] [blame] | 654 | } |
Peter Collingbourne | aef3659 | 2015-06-29 22:04:09 +0000 | [diff] [blame] | 655 | |
Ben Dunbobbin | 564d248 | 2019-06-12 11:07:56 +0000 | [diff] [blame] | 656 | lto::InputFile *LTOModule::createInputFile(const void *buffer, |
| 657 | size_t buffer_size, const char *path, |
| 658 | std::string &outErr) { |
| 659 | StringRef Data((const char *)buffer, buffer_size); |
| 660 | MemoryBufferRef BufferRef(Data, path); |
| 661 | |
| 662 | Expected<std::unique_ptr<lto::InputFile>> ObjOrErr = |
| 663 | lto::InputFile::create(BufferRef); |
| 664 | |
| 665 | if (ObjOrErr) |
| 666 | return ObjOrErr->release(); |
| 667 | |
| 668 | outErr = std::string(path) + |
| 669 | ": Could not read LTO input file: " + toString(ObjOrErr.takeError()); |
| 670 | return nullptr; |
| 671 | } |
| 672 | |
| 673 | size_t LTOModule::getDependentLibraryCount(lto::InputFile *input) { |
| 674 | return input->getDependentLibraries().size(); |
| 675 | } |
| 676 | |
| 677 | const char *LTOModule::getDependentLibrary(lto::InputFile *input, size_t index, |
| 678 | size_t *size) { |
| 679 | StringRef S = input->getDependentLibraries()[index]; |
| 680 | *size = S.size(); |
| 681 | return S.data(); |
Yunzhong Gao | a88d7ab | 2014-01-21 18:31:27 +0000 | [diff] [blame] | 682 | } |
Francis Visoiu Mistrih | e551b73 | 2020-02-18 17:13:47 -0800 | [diff] [blame] | 683 | |
| 684 | Expected<uint32_t> LTOModule::getMachOCPUType() const { |
| 685 | return MachO::getCPUType(Triple(Mod->getTargetTriple())); |
| 686 | } |
| 687 | |
| 688 | Expected<uint32_t> LTOModule::getMachOCPUSubType() const { |
| 689 | return MachO::getCPUSubType(Triple(Mod->getTargetTriple())); |
| 690 | } |
Wael Yehia | 9559bd1 | 2021-07-27 09:26:38 -0400 | [diff] [blame] | 691 | |
| 692 | bool LTOModule::hasCtorDtor() const { |
| 693 | for (auto Sym : SymTab.symbols()) { |
| 694 | if (auto *GV = Sym.dyn_cast<GlobalValue *>()) { |
| 695 | StringRef Name = GV->getName(); |
| 696 | if (Name.consume_front("llvm.global_")) { |
| 697 | if (Name.equals("ctors") || Name.equals("dtors")) |
| 698 | return true; |
| 699 | } |
| 700 | } |
| 701 | } |
| 702 | return false; |
| 703 | } |