4 files changed, 66 insertions, 6 deletions
diff --git a/lib/Support/Unix/PathV2.inc b/lib/Support/Unix/PathV2.inc
index 11c5b05..7ef7dfd 100644
--- a/lib/Support/Unix/PathV2.inc
+++ b/lib/Support/Unix/PathV2.inc
@@ -432,9 +432,7 @@ rety_open_create:
     if (SavedErrno == errc::file_exists)
       goto retry_random_path;
     // If path prefix doesn't exist, try to create it.
-    if (SavedErrno == errc::no_such_file_or_directory &&
-        !exists(path::parent_path(RandomPath)) &&
-        !TriedToCreateParent) {
+    if (SavedErrno == errc::no_such_file_or_directory && !TriedToCreateParent) {
       TriedToCreateParent = true;
       StringRef p(RandomPath);
       SmallString<64> dir_to_create;
diff --git a/lib/Support/Unix/Program.inc b/lib/Support/Unix/Program.inc
index 117151c..aa03d48 100644
--- a/lib/Support/Unix/Program.inc
+++ b/lib/Support/Unix/Program.inc
@@ -32,6 +32,9 @@
 #if HAVE_FCNTL_H
 #include <fcntl.h>
 #endif
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
 #ifdef HAVE_POSIX_SPAWN
 #include <spawn.h>
 #if !defined(__APPLE__)
@@ -409,4 +412,25 @@ error_code Program::ChangeStderrToBinary(){
   return make_error_code(errc::success);
 }
 
+bool llvm::sys::argumentsFitWithinSystemLimits(ArrayRef<const char*> Args) {
+  static long ArgMax = sysconf(_SC_ARG_MAX);
+
+  // System says no practical limit.
+  if (ArgMax == -1)
+    return true;
+
+  // Conservatively account for space required by environment variables.
+  ArgMax /= 2;
+
+  size_t ArgLength = 0;
+  for (ArrayRef<const char*>::iterator I = Args.begin(), E = Args.end();
+       I != E; ++I) {
+    ArgLength += strlen(*I) + 1;
+    if (ArgLength > size_t(ArgMax)) {
+      return false;
+    }
+  }
+  return true;
+}
+
 }
diff --git a/lib/Support/Unix/Signals.inc b/lib/Support/Unix/Signals.inc
index b8be623..7580fb7 100644
--- a/lib/Support/Unix/Signals.inc
+++ b/lib/Support/Unix/Signals.inc
@@ -27,10 +27,12 @@
 #if HAVE_SYS_STAT_H
 #include <sys/stat.h>
 #endif
-#if HAVE_DLFCN_H && HAVE_CXXABI_H && __GNUG__
-#include <dlfcn.h>
+#if HAVE_CXXABI_H
 #include <cxxabi.h>
 #endif
+#if HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
 #if HAVE_MACH_MACH_H
 #include <mach/mach.h>
 #endif
@@ -290,9 +292,13 @@ void llvm::sys::PrintStackTrace(FILE *FD) {
             (int)(sizeof(void*) * 2) + 2, (unsigned long)StackTrace[i]);
 
     if (dlinfo.dli_sname != NULL) {
-      int res;
       fputc(' ', FD);
+#  if HAVE_CXXABI_H
+      int res;
       char* d = abi::__cxa_demangle(dlinfo.dli_sname, NULL, NULL, &res);
+#  else
+      char* d = NULL;
+#  endif
       if (d == NULL) fputs(dlinfo.dli_sname, FD);
       else           fputs(d, FD);
       free(d);
diff --git a/lib/Support/Unix/Watchdog.inc b/lib/Support/Unix/Watchdog.inc
new file mode 100644
index 0000000..5d89c0e
--- /dev/null
+++ b/lib/Support/Unix/Watchdog.inc
@@ -0,0 +1,32 @@
+//===--- Unix/Watchdog.inc - Unix Watchdog Implementation -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides the generic Unix implementation of the Watchdog class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+namespace llvm {
+  namespace sys {
+    Watchdog::Watchdog(unsigned int seconds) {
+#ifdef HAVE_UNISTD_H
+      alarm(seconds);
+#endif
+    }
+
+    Watchdog::~Watchdog() {
+#ifdef HAVE_UNISTD_H
+      alarm(0);
+#endif
+    }
+  }
+}