From a303c417bbdb53703c2c17398b08486bde78f1f6 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Tue, 2 May 2017 18:30:13 +0000
Subject: Vendor import of llvm trunk r301939:
 https://llvm.org/svn/llvm-project/llvm/trunk@301939

---
 lib/DebugInfo/PDB/Native/ModuleDebugStream.cpp | 89 ++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 lib/DebugInfo/PDB/Native/ModuleDebugStream.cpp

(limited to 'lib/DebugInfo/PDB/Native/ModuleDebugStream.cpp')

diff --git a/lib/DebugInfo/PDB/Native/ModuleDebugStream.cpp b/lib/DebugInfo/PDB/Native/ModuleDebugStream.cpp
new file mode 100644
index 000000000000..d7a203746a0d
--- /dev/null
+++ b/lib/DebugInfo/PDB/Native/ModuleDebugStream.cpp
@@ -0,0 +1,89 @@
+//===- ModuleDebugStream.cpp - PDB Module Info Stream Access --------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/Native/ModuleDebugStream.h"
+#include "llvm/ADT/iterator_range.h"
+#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
+#include "llvm/DebugInfo/PDB/Native/DbiModuleDescriptor.h"
+#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
+#include "llvm/DebugInfo/PDB/Native/RawError.h"
+#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/BinaryStreamRef.h"
+#include "llvm/Support/Error.h"
+#include <algorithm>
+#include <cstdint>
+
+using namespace llvm;
+using namespace llvm::codeview;
+using namespace llvm::msf;
+using namespace llvm::pdb;
+
+ModuleDebugStreamRef::ModuleDebugStreamRef(
+    const DbiModuleDescriptor &Module,
+    std::unique_ptr<MappedBlockStream> Stream)
+    : Mod(Module), Stream(std::move(Stream)) {}
+
+ModuleDebugStreamRef::~ModuleDebugStreamRef() = default;
+
+Error ModuleDebugStreamRef::reload() {
+  BinaryStreamReader Reader(*Stream);
+
+  uint32_t SymbolSize = Mod.getSymbolDebugInfoByteSize();
+  uint32_t C11Size = Mod.getC11LineInfoByteSize();
+  uint32_t C13Size = Mod.getC13LineInfoByteSize();
+
+  if (C11Size > 0 && C13Size > 0)
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "Module has both C11 and C13 line info");
+
+  BinaryStreamRef S;
+
+  if (auto EC = Reader.readInteger(Signature))
+    return EC;
+  if (auto EC = Reader.readArray(SymbolsSubstream, SymbolSize - 4))
+    return EC;
+
+  if (auto EC = Reader.readStreamRef(C11LinesSubstream, C11Size))
+    return EC;
+  if (auto EC = Reader.readStreamRef(C13LinesSubstream, C13Size))
+    return EC;
+
+  BinaryStreamReader LineReader(C13LinesSubstream);
+  if (auto EC =
+          LineReader.readArray(LinesAndChecksums, LineReader.bytesRemaining()))
+    return EC;
+
+  uint32_t GlobalRefsSize;
+  if (auto EC = Reader.readInteger(GlobalRefsSize))
+    return EC;
+  if (auto EC = Reader.readStreamRef(GlobalRefsSubstream, GlobalRefsSize))
+    return EC;
+  if (Reader.bytesRemaining() > 0)
+    return make_error<RawError>(raw_error_code::corrupt_file,
+                                "Unexpected bytes in module stream.");
+
+  return Error::success();
+}
+
+iterator_range<codeview::CVSymbolArray::Iterator>
+ModuleDebugStreamRef::symbols(bool *HadError) const {
+  return make_range(SymbolsSubstream.begin(HadError), SymbolsSubstream.end());
+}
+
+llvm::iterator_range<ModuleDebugStreamRef::LinesAndChecksumsIterator>
+ModuleDebugStreamRef::linesAndChecksums() const {
+  return make_range(LinesAndChecksums.begin(), LinesAndChecksums.end());
+}
+
+bool ModuleDebugStreamRef::hasLineInfo() const {
+  return C13LinesSubstream.getLength() > 0;
+}
+
+Error ModuleDebugStreamRef::commit() { return Error::success(); }
-- 
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