X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FSupport%2FProcess.cpp;h=ad67e1b10b48b95241a1bcd42f4118f47995e57a;hb=d3198ce4bcc3ec64068d6508f2f08be97e6be83e;hp=1e21d64e601f43cc85da8fa054faad2ef7d7a7b5;hpb=f5867ab7178784bc63a3deafcf4fb09260e4d19a;p=oota-llvm.git

diff --git a/lib/Support/Process.cpp b/lib/Support/Process.cpp
index 1e21d64e601..ad67e1b10b4 100644
--- a/lib/Support/Process.cpp
+++ b/lib/Support/Process.cpp
@@ -7,13 +7,16 @@
 //
 //===----------------------------------------------------------------------===//
 //
-//  This header file implements the operating system Process concept.
+//  This file implements the operating system Process concept.
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/Config/config.h"
-#include "llvm/Support/Process.h"
 #include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Process.h"
+#include "llvm/Support/Program.h"
 
 using namespace llvm;
 using namespace sys;
@@ -23,37 +26,69 @@ using namespace sys;
 //===          independent code.
 //===----------------------------------------------------------------------===//
 
-// Empty virtual destructor to anchor the vtable for the process class.
-process::~process() {}
+/// \brief A helper function to compute the elapsed wall-time since the program
+/// started.
+///
+/// Note that this routine actually computes the elapsed wall time since the
+/// first time it was called. However, we arrange to have it called during the
+/// startup of the process to get approximately correct results.
+static TimeValue getElapsedWallTime() {
+  static TimeValue &StartTime = *new TimeValue(TimeValue::now());
+  return TimeValue::now() - StartTime;
+}
 
-self_process *process::get_self() {
-  // Use a function local static for thread safe initialization and allocate it
-  // as a raw pointer to ensure it is never destroyed.
-  static self_process *SP = new self_process();
+/// \brief A special global variable to ensure we call \c getElapsedWallTime
+/// during global initialization of the program.
+///
+/// Note that this variable is never referenced elsewhere. Doing so could
+/// create race conditions during program startup or shutdown.
+static volatile TimeValue DummyTimeValue = getElapsedWallTime();
 
-  return SP;
-}
+Optional<std::string> Process::FindInEnvPath(const std::string& EnvName,
+                                             const std::string& FileName)
+{
+  Optional<std::string> FoundPath;
+  Optional<std::string> OptPath = Process::GetEnv(EnvName);
+  if (!OptPath.hasValue())
+    return FoundPath;
 
-#if defined(_MSC_VER)
-// Visual Studio complains that the self_process destructor never exits. This
-// doesn't make much sense, as that's the whole point of calling abort... Just
-// silence this warning.
-#pragma warning(push)
-#pragma warning(disable:4722)
-#endif
+  const char EnvPathSeparatorStr[] = {EnvPathSeparator, '\0'};
+  SmallVector<StringRef, 8> Dirs;
+  SplitString(OptPath.getValue(), Dirs, EnvPathSeparatorStr);
 
-// The destructor for the self_process subclass must never actually be
-// executed. There should be at most one instance of this class, and that
-// instance should live until the process terminates to avoid the potential for
-// racy accesses during shutdown.
-self_process::~self_process() {
-  llvm_unreachable("This destructor must never be executed!");
+  for (const auto &Dir : Dirs) {
+    if (Dir.empty())
+      continue;
+
+    SmallString<128> FilePath(Dir);
+    path::append(FilePath, FileName);
+    if (fs::exists(Twine(FilePath))) {
+      FoundPath = FilePath.str();
+      break;
+    }
+  }
+
+  return FoundPath;
 }
 
-#if defined(_MSC_VER)
-#pragma warning(pop)
-#endif
 
+#define COLOR(FGBG, CODE, BOLD) "\033[0;" BOLD FGBG CODE "m"
+
+#define ALLCOLORS(FGBG,BOLD) {\
+    COLOR(FGBG, "0", BOLD),\
+    COLOR(FGBG, "1", BOLD),\
+    COLOR(FGBG, "2", BOLD),\
+    COLOR(FGBG, "3", BOLD),\
+    COLOR(FGBG, "4", BOLD),\
+    COLOR(FGBG, "5", BOLD),\
+    COLOR(FGBG, "6", BOLD),\
+    COLOR(FGBG, "7", BOLD)\
+  }
+
+static const char colorcodes[2][2][8][10] = {
+ { ALLCOLORS("3",""), ALLCOLORS("3","1;") },
+ { ALLCOLORS("4",""), ALLCOLORS("4","1;") }
+};
 
 // Include the platform-specific parts of this class.
 #ifdef LLVM_ON_UNIX