llvm-symbolizer: Recognize a drive letter on win32. Then "REQUIRES: shell" can be removed.

FIXME: Could we use llvm::sys::Path here?
llvm-svn: 185322

llvm/test/DebugInfo/llvm-symbolizer.test

@@ -10,8 +10,6 @@ RUN: echo "%p/Inputs/macho-universal:x86_64 0x100000f05" >> %t.input
 RUN: llvm-symbolizer --functions --inlining --demangle=false \
 RUN:    --default-arch=i386 < %t.input | FileCheck %s
 
-REQUIRES: shell
-
 CHECK:       main
 CHECK-NEXT: /tmp/dbginfo{{[/\\]}}dwarfdump-test.cc:16
 

llvm/tools/llvm-symbolizer/LLVMSymbolize.cpp

@@ -279,6 +279,11 @@ LLVMSymbolizer::getOrCreateModuleInfo(const std::string &ModuleName) {
   std::string BinaryName = ModuleName;
   std::string ArchName = Opts.DefaultArch;
   size_t ColonPos = ModuleName.find(':');
+#if defined(_WIN32)
+  // Recognize a drive letter on win32.
+  if (ColonPos == 1 && isalpha(ModuleName[0]))
+    ColonPos = ModuleName.find(':', 2);
+#endif
   if (ColonPos != std::string::npos) {
     BinaryName = ModuleName.substr(0, ColonPos);
     ArchName = ModuleName.substr(ColonPos + 1);