Search for llvm-symbolizer binary in the same directory as argv[0], before

looking for it along $PATH. This allows installs of LLVM tools outside of
$PATH to find the symbolizer and produce pretty backtraces if they crash.

llvm-svn: 272232

llvm/tools/llvm-cov/TestingSupport.cpp

@@ -11,9 +11,6 @@
 #include "llvm/ProfileData/InstrProf.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/LEB128.h"
-#include "llvm/Support/ManagedStatic.h"
-#include "llvm/Support/PrettyStackTrace.h"
-#include "llvm/Support/Signals.h"
 #include "llvm/Support/raw_ostream.h"
 #include <functional>
 #include <system_error>
@@ -22,10 +19,6 @@ using namespace llvm;
 using namespace object;
 
 int convertForTestingMain(int argc, const char *argv[]) {
-  sys::PrintStackTraceOnErrorSignal();
-  PrettyStackTraceProgram X(argc, argv);
-  llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
-
   cl::opt<std::string> InputSourceFile(cl::Positional, cl::Required,
                                        cl::desc("<Source file>"));