1 files changed, 138 insertions, 0 deletions
diff --git a/tools/sanstats/sanstats.cpp b/tools/sanstats/sanstats.cpp
new file mode 100644
index 000000000000..b2216eab119e
--- /dev/null
+++ b/tools/sanstats/sanstats.cpp
@@ -0,0 +1,138 @@
+//===- sanstats.cpp - Sanitizer statistics dumper -------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This tool dumps statistics information from files in the format produced
+// by clang's -fsanitize-stats feature.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/Symbolize/Symbolize.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ErrorOr.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Transforms/Utils/SanitizerStats.h"
+#include <stdint.h>
+
+using namespace llvm;
+
+static cl::opt<std::string> ClInputFile(cl::Positional, cl::Required,
+                                        cl::desc("<filename>"));
+
+static cl::opt<bool> ClDemangle("demangle", cl::init(false),
+                                cl::desc("Print demangled function name."));
+
+inline uint64_t KindFromData(uint64_t Data, char SizeofPtr) {
+  return Data >> (SizeofPtr * 8 - kSanitizerStatKindBits);
+}
+
+inline uint64_t CountFromData(uint64_t Data, char SizeofPtr) {
+  return Data & ((1ull << (SizeofPtr * 8 - kSanitizerStatKindBits)) - 1);
+}
+
+uint64_t ReadLE(char Size, const char *Begin, const char *End) {
+  uint64_t Result = 0;
+  char Pos = 0;
+  while (Begin < End && Pos != Size) {
+    Result |= uint64_t(uint8_t(*Begin)) << (Pos * 8);
+    ++Begin;
+    ++Pos;
+  }
+  return Result;
+}
+
+const char *ReadModule(char SizeofPtr, const char *Begin, const char *End) {
+  const char *FilenameBegin = Begin;
+  while (Begin != End && *Begin)
+    ++Begin;
+  if (Begin == End)
+    return nullptr;
+  StringRef Filename(FilenameBegin, Begin - FilenameBegin);
+
+  ++Begin;
+  if (Begin == End)
+    return nullptr;
+
+  symbolize::LLVMSymbolizer::Options SymbolizerOptions;
+  SymbolizerOptions.Demangle = ClDemangle;
+  SymbolizerOptions.UseSymbolTable = true;
+  symbolize::LLVMSymbolizer Symbolizer(SymbolizerOptions);
+
+  while (1) {
+    uint64_t Addr = ReadLE(SizeofPtr, Begin, End);
+    Begin += SizeofPtr;
+    uint64_t Data = ReadLE(SizeofPtr, Begin, End);
+    Begin += SizeofPtr;
+
+    if (Begin > End)
+      return nullptr;
+    if (Addr == 0 && Data == 0)
+      return Begin;
+    if (Begin == End)
+      return nullptr;
+
+    if (Expected<DILineInfo> LineInfo =
+            Symbolizer.symbolizeCode(Filename, Addr)) {
+      llvm::outs() << LineInfo->FileName << ':' << LineInfo->Line << ' '
+                   << LineInfo->FunctionName << ' ';
+    } else {
+      logAllUnhandledErrors(LineInfo.takeError(), llvm::outs(), "<error> ");
+    }
+
+    switch (KindFromData(Data, SizeofPtr)) {
+    case SanStat_CFI_VCall:
+      llvm::outs() << "cfi-vcall";
+      break;
+    case SanStat_CFI_NVCall:
+      llvm::outs() << "cfi-nvcall";
+      break;
+    case SanStat_CFI_DerivedCast:
+      llvm::outs() << "cfi-derived-cast";
+      break;
+    case SanStat_CFI_UnrelatedCast:
+      llvm::outs() << "cfi-unrelated-cast";
+      break;
+    case SanStat_CFI_ICall:
+      llvm::outs() << "cfi-icall";
+      break;
+    default:
+      llvm::outs() << "<unknown>";
+      break;
+    }
+
+    llvm::outs() << " " << CountFromData(Data, SizeofPtr) << '\n';
+  }
+}
+
+int main(int argc, char **argv) {
+  cl::ParseCommandLineOptions(argc, argv,
+                              "Sanitizer Statistics Processing Tool");
+
+  ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr =
+      MemoryBuffer::getFile(ClInputFile, -1, false);
+  if (!MBOrErr) {
+    errs() << argv[0] << ": " << ClInputFile << ": "
+           << MBOrErr.getError().message() << '\n';
+    return 1;
+  }
+  std::unique_ptr<MemoryBuffer> MB = std::move(MBOrErr.get());
+  const char *Begin = MB->getBufferStart(), *End = MB->getBufferEnd();
+  if (Begin == End) {
+    errs() << argv[0] << ": " << ClInputFile << ": short read\n";
+    return 1;
+  }
+  char SizeofPtr = *Begin++;
+  while (Begin != End) {
+    Begin = ReadModule(SizeofPtr, Begin, End);
+    if (Begin == nullptr) {
+      errs() << argv[0] << ": " << ClInputFile << ": short read\n";
+      return 1;
+    }
+    assert(Begin <= End);
+  }
+}