[llvm-pdbdump-fuzzer] Add a fuzzer for llvm-pdbdump

llvm-svn: 271243

3 files changed, 96 insertions, 0 deletions

diff --git a/llvm/tools/llvm-pdbdump/CMakeLists.txt b/llvm/tools/llvm-pdbdump/CMakeLists.txt
index 02f386efe03..5f475c2b31f 100644
--- a/llvm/tools/llvm-pdbdump/CMakeLists.txt
+++ b/llvm/tools/llvm-pdbdump/CMakeLists.txt
@@ -18,3 +18,7 @@ add_llvm_tool(llvm-pdbdump
   TypedefDumper.cpp
   VariableDumper.cpp
   )
+
+if(LLVM_USE_SANITIZE_COVERAGE)
+  add_subdirectory(fuzzer)
+endif()
diff --git a/llvm/tools/llvm-pdbdump/fuzzer/CMakeLists.txt b/llvm/tools/llvm-pdbdump/fuzzer/CMakeLists.txt
new file mode 100644
index 00000000000..cf5a0f70aab
--- /dev/null
+++ b/llvm/tools/llvm-pdbdump/fuzzer/CMakeLists.txt
@@ -0,0 +1,15 @@
+set(LLVM_LINK_COMPONENTS
+  DebugInfoCodeView
+  DebugInfoPDB
+  Object
+  Support
+  )
+
+add_llvm_executable(llvm-pdbdump-fuzzer
+  EXCLUDE_FROM_ALL
+  llvm-pdbdump-fuzzer.cpp
+  )
+
+target_link_libraries(llvm-pdbdump-fuzzer
+  LLVMFuzzer
+  )
diff --git a/llvm/tools/llvm-pdbdump/fuzzer/llvm-pdbdump-fuzzer.cpp b/llvm/tools/llvm-pdbdump/fuzzer/llvm-pdbdump-fuzzer.cpp
new file mode 100644
index 00000000000..bfa8363898e
--- /dev/null
+++ b/llvm/tools/llvm-pdbdump/fuzzer/llvm-pdbdump-fuzzer.cpp
@@ -0,0 +1,77 @@
+//===-- llvm-pdbdump-fuzzer.cpp - Fuzz the llvm-pdbdump tool --------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief This file implements a function that runs llvm-pdbdump
+///  on a single input. This function is then linked into the Fuzzer library.
+///
+//===----------------------------------------------------------------------===//
+#include "llvm/DebugInfo/CodeView/SymbolDumper.h"
+#include "llvm/DebugInfo/CodeView/TypeDumper.h"
+#include "llvm/DebugInfo/PDB/Raw/DbiStream.h"
+#include "llvm/DebugInfo/PDB/Raw/ModStream.h"
+#include "llvm/DebugInfo/PDB/Raw/PDBFile.h"
+#include "llvm/DebugInfo/PDB/Raw/RawSession.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/ScopedPrinter.h"
+
+using namespace llvm;
+
+extern "C" void LLVMFuzzerTestOneInput(uint8_t *data, size_t size) {
+  std::unique_ptr<MemoryBuffer> Buff = MemoryBuffer::getMemBuffer(
+      StringRef((const char *)data, size), "", false);
+
+  ScopedPrinter P(nulls());
+  codeview::CVTypeDumper TD(P, false);
+
+  std::unique_ptr<pdb::PDBFile> File(new pdb::PDBFile(std::move(Buff)));
+  if (auto E = File->parseFileHeaders()) {
+    consumeError(std::move(E));
+    return;
+  }
+  if (auto E = File->parseStreamData()) {
+    consumeError(std::move(E));
+    return;
+  }
+
+  auto DbiS = File->getPDBDbiStream();
+  if (auto E = DbiS.takeError()) {
+    consumeError(std::move(E));
+    return;
+  }
+  auto TpiS = File->getPDBTpiStream();
+  if (auto E = TpiS.takeError()) {
+    consumeError(std::move(E));
+    return;
+  }
+  auto IpiS = File->getPDBIpiStream();
+  if (auto E = IpiS.takeError()) {
+    consumeError(std::move(E));
+    return;
+  }
+  auto InfoS = File->getPDBInfoStream();
+  if (auto E = InfoS.takeError()) {
+    consumeError(std::move(E));
+    return;
+  }
+  pdb::DbiStream &DS = DbiS.get();
+
+  for (auto &Modi : DS.modules()) {
+    pdb::ModStream ModS(*File, Modi.Info);
+    if (auto E = ModS.reload()) {
+      consumeError(std::move(E));
+      return;
+    }
+    codeview::CVSymbolDumper SD(P, TD, nullptr, false);
+    bool HadError = false;
+    for (auto &S : ModS.symbols(&HadError)) {
+      SD.dump(S);
+    }
+  }
+}