fix ya.make

1 files changed, 116 insertions, 0 deletions

diff --git a/contrib/libs/llvm12/lib/DebugInfo/GSYM/ObjectFileTransformer.cpp b/contrib/libs/llvm12/lib/DebugInfo/GSYM/ObjectFileTransformer.cpp
new file mode 100644
index 0000000000..ad35aefe77
--- /dev/null
+++ b/contrib/libs/llvm12/lib/DebugInfo/GSYM/ObjectFileTransformer.cpp
@@ -0,0 +1,116 @@
+//===- ObjectFileTransformer.cpp --------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <unordered_set>
+
+#include "llvm/Object/ELFObjectFile.h"
+#include "llvm/Object/MachOUniversal.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/DataExtractor.h"
+#include "llvm/Support/raw_ostream.h"
+
+#include "llvm/DebugInfo/GSYM/ObjectFileTransformer.h"
+#include "llvm/DebugInfo/GSYM/GsymCreator.h"
+
+using namespace llvm;
+using namespace gsym;
+
+constexpr uint32_t NT_GNU_BUILD_ID_TAG = 0x03;
+
+static std::vector<uint8_t> getUUID(const object::ObjectFile &Obj) {
+  // Extract the UUID from the object file
+  std::vector<uint8_t> UUID;
+  if (auto *MachO = dyn_cast<object::MachOObjectFile>(&Obj)) {
+    const ArrayRef<uint8_t> MachUUID = MachO->getUuid();
+    if (!MachUUID.empty())
+      UUID.assign(MachUUID.data(), MachUUID.data() + MachUUID.size());
+  } else if (isa<object::ELFObjectFileBase>(&Obj)) {
+    const StringRef GNUBuildID(".note.gnu.build-id");
+    for (const object::SectionRef &Sect : Obj.sections()) {
+      Expected<StringRef> SectNameOrErr = Sect.getName();
+      if (!SectNameOrErr) {
+        consumeError(SectNameOrErr.takeError());
+        continue;
+      }
+      StringRef SectName(*SectNameOrErr);
+      if (SectName != GNUBuildID)
+        continue;
+      StringRef BuildIDData;
+      Expected<StringRef> E = Sect.getContents();
+      if (E)
+        BuildIDData = *E;
+      else {
+        consumeError(E.takeError());
+        continue;
+      }
+      DataExtractor Decoder(BuildIDData, Obj.makeTriple().isLittleEndian(), 8);
+      uint64_t Offset = 0;
+      const uint32_t NameSize = Decoder.getU32(&Offset);
+      const uint32_t PayloadSize = Decoder.getU32(&Offset);
+      const uint32_t PayloadType = Decoder.getU32(&Offset);
+      StringRef Name(Decoder.getFixedLengthString(&Offset, NameSize));
+      if (Name == "GNU" && PayloadType == NT_GNU_BUILD_ID_TAG) {
+        Offset = alignTo(Offset, 4);
+        StringRef UUIDBytes(Decoder.getBytes(&Offset, PayloadSize));
+        if (!UUIDBytes.empty()) {
+          auto Ptr = reinterpret_cast<const uint8_t *>(UUIDBytes.data());
+          UUID.assign(Ptr, Ptr + UUIDBytes.size());
+        }
+      }
+    }
+  }
+  return UUID;
+}
+
+llvm::Error ObjectFileTransformer::convert(const object::ObjectFile &Obj,
+                                           raw_ostream &Log,
+                                           GsymCreator &Gsym) {
+  using namespace llvm::object;
+
+  const bool IsMachO = isa<MachOObjectFile>(&Obj);
+  const bool IsELF = isa<ELFObjectFileBase>(&Obj);
+
+  // Read build ID.
+  Gsym.setUUID(getUUID(Obj));
+
+  // Parse the symbol table.
+  size_t NumBefore = Gsym.getNumFunctionInfos();
+  for (const object::SymbolRef &Sym : Obj.symbols()) {
+    Expected<SymbolRef::Type> SymType = Sym.getType();
+    if (!SymType) {
+      consumeError(SymType.takeError());
+      continue;
+    }
+    Expected<uint64_t> AddrOrErr = Sym.getValue();
+    if (!AddrOrErr)
+      // TODO: Test this error.
+      return AddrOrErr.takeError();
+
+    if (SymType.get() != SymbolRef::Type::ST_Function ||
+        !Gsym.IsValidTextAddress(*AddrOrErr) ||
+        Gsym.hasFunctionInfoForAddress(*AddrOrErr))
+      continue;
+    // Function size for MachO files will be 0
+    constexpr bool NoCopy = false;
+    const uint64_t size = IsELF ? ELFSymbolRef(Sym).getSize() : 0;
+    Expected<StringRef> Name = Sym.getName();
+    if (!Name) {
+      logAllUnhandledErrors(Name.takeError(), Log, "ObjectFileTransformer: ");
+      continue;
+    }
+    // Remove the leading '_' character in any symbol names if there is one
+    // for mach-o files.
+    if (IsMachO)
+      Name->consume_front("_");
+    Gsym.addFunctionInfo(
+        FunctionInfo(*AddrOrErr, size, Gsym.insertString(*Name, NoCopy)));
+  }
+  size_t FunctionsAddedCount = Gsym.getNumFunctionInfos() - NumBefore;
+  Log << "Loaded " << FunctionsAddedCount << " functions from symbol table.\n";
+  return Error::success();
+}