1 files changed, 119 insertions, 0 deletions
diff --git a/tools/llvm-symbolizer/llvm-symbolizer.cpp b/tools/llvm-symbolizer/llvm-symbolizer.cpp
new file mode 100644
index 000000000000..0cafffaf7126
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+++ b/tools/llvm-symbolizer/llvm-symbolizer.cpp
@@ -0,0 +1,119 @@
+//===-- llvm-symbolizer.cpp - Simple addr2line-like symbolizer ------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This utility works much like "addr2line". It is able of transforming
+// tuples (module name, module offset) to code locations (function name,
+// file, line number, column number). It is targeted for compiler-rt tools
+// (especially AddressSanitizer and ThreadSanitizer) that can use it
+// to symbolize stack traces in their error reports.
+//
+//===----------------------------------------------------------------------===//
+
+#include "LLVMSymbolize.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cstdio>
+#include <cstring>
+#include <string>
+
+using namespace llvm;
+using namespace symbolize;
+
+static cl::opt<bool>
+ClUseSymbolTable("use-symbol-table", cl::init(true),
+                 cl::desc("Prefer names in symbol table to names "
+                          "in debug info"));
+
+static cl::opt<bool>
+ClPrintFunctions("functions", cl::init(true),
+                 cl::desc("Print function names as well as line "
+                          "information for a given address"));
+
+static cl::opt<bool>
+ClPrintInlining("inlining", cl::init(true),
+                cl::desc("Print all inlined frames for a given address"));
+
+static cl::opt<bool>
+ClDemangle("demangle", cl::init(true), cl::desc("Demangle function names"));
+
+static bool parseCommand(bool &IsData, std::string &ModuleName,
+                         uint64_t &ModuleOffset) {
+  const char *kDataCmd = "DATA ";
+  const char *kCodeCmd = "CODE ";
+  const int kMaxInputStringLength = 1024;
+  const char kDelimiters[] = " \n";
+  char InputString[kMaxInputStringLength];
+  if (!fgets(InputString, sizeof(InputString), stdin))
+    return false;
+  IsData = false;
+  ModuleName = "";
+  std::string ModuleOffsetStr = "";
+  char *pos = InputString;
+  if (strncmp(pos, kDataCmd, strlen(kDataCmd)) == 0) {
+    IsData = true;
+    pos += strlen(kDataCmd);
+  } else if (strncmp(pos, kCodeCmd, strlen(kCodeCmd)) == 0) {
+    IsData = false;
+    pos += strlen(kCodeCmd);
+  } else {
+    // If no cmd, assume it's CODE.
+    IsData = false;
+  }
+  // Skip delimiters and parse input filename.
+  pos += strspn(pos, kDelimiters);
+  if (*pos == '"' || *pos == '\'') {
+    char quote = *pos;
+    pos++;
+    char *end = strchr(pos, quote);
+    if (end == 0)
+      return false;
+    ModuleName = std::string(pos, end - pos);
+    pos = end + 1;
+  } else {
+    int name_length = strcspn(pos, kDelimiters);
+    ModuleName = std::string(pos, name_length);
+    pos += name_length;
+  }
+  // Skip delimiters and parse module offset.
+  pos += strspn(pos, kDelimiters);
+  int offset_length = strcspn(pos, kDelimiters);
+  ModuleOffsetStr = std::string(pos, offset_length);
+  if (StringRef(ModuleOffsetStr).getAsInteger(0, ModuleOffset))
+    return false;
+  return true;
+}
+
+int main(int argc, char **argv) {
+  // Print stack trace if we signal out.
+  sys::PrintStackTraceOnErrorSignal();
+  PrettyStackTraceProgram X(argc, argv);
+  llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+
+  cl::ParseCommandLineOptions(argc, argv, "llvm symbolizer for compiler-rt\n");
+  LLVMSymbolizer::Options Opts(ClUseSymbolTable, ClPrintFunctions,
+                               ClPrintInlining, ClDemangle);
+  LLVMSymbolizer Symbolizer(Opts);
+
+  bool IsData = false;
+  std::string ModuleName;
+  uint64_t ModuleOffset;
+  while (parseCommand(IsData, ModuleName, ModuleOffset)) {
+    std::string Result =
+        IsData ? Symbolizer.symbolizeData(ModuleName, ModuleOffset)
+               : Symbolizer.symbolizeCode(ModuleName, ModuleOffset);
+    outs() << Result << "\n";
+    outs().flush();
+  }
+  return 0;
+}