Updating branches/google/stable to r176857

git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/google/stable@177040 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 15 insertions, 6 deletions

diff --git a/lib/Support/MemoryBuffer.cpp b/lib/Support/MemoryBuffer.cpp
index cb587d59c9..4c558b37cf 100644
--- a/lib/Support/MemoryBuffer.cpp
+++ b/lib/Support/MemoryBuffer.cpp
@@ -33,8 +33,13 @@
 #include <unistd.h>
 #else
 #include <io.h>
-#ifndef S_ISFIFO
-#define S_ISFIFO(x) (0)
+// Simplistic definitinos of these macros to allow files to be read with
+// MapInFilePages.
+#ifndef S_ISREG
+#define S_ISREG(x) (1)
+#endif
+#ifndef S_ISBLK
+#define S_ISBLK(x) (0)
 #endif
 #endif
 #include <fcntl.h>
@@ -187,7 +192,7 @@ public:
     : MemoryBufferMem(Buffer, RequiresNullTerminator) { }
 
   ~MemoryBufferMMapFile() {
-    static int PageSize = sys::Process::GetPageSize();
+    static int PageSize = sys::process::get_self()->page_size();
 
     uintptr_t Start = reinterpret_cast<uintptr_t>(getBufferStart());
     size_t Size = getBufferSize();
@@ -239,6 +244,8 @@ error_code MemoryBuffer::getFile(const char *Filename,
                                  OwningPtr<MemoryBuffer> &result,
                                  int64_t FileSize,
                                  bool RequiresNullTerminator) {
+  // FIXME: Review if this check is unnecessary on windows as well.
+#ifdef LLVM_ON_WIN32
   // First check that the "file" is not a directory
   bool is_dir = false;
   error_code err = sys::fs::is_directory(Filename, is_dir);
@@ -246,6 +253,7 @@ error_code MemoryBuffer::getFile(const char *Filename,
     return err;
   if (is_dir)
     return make_error_code(errc::is_a_directory);
+#endif
 
   int OpenFlags = O_RDONLY;
 #ifdef O_BINARY
@@ -309,7 +317,7 @@ error_code MemoryBuffer::getOpenFile(int FD, const char *Filename,
                                      uint64_t FileSize, uint64_t MapSize,
                                      int64_t Offset,
                                      bool RequiresNullTerminator) {
-  static int PageSize = sys::Process::GetPageSize();
+  static int PageSize = sys::process::get_self()->page_size();
 
   // Default is to map the full file.
   if (MapSize == uint64_t(-1)) {
@@ -322,9 +330,10 @@ error_code MemoryBuffer::getOpenFile(int FD, const char *Filename,
         return error_code(errno, posix_category());
       }
 
-      // If this is a named pipe, we can't trust the size. Create the memory
+      // If this not a file or a block device (e.g. it's a named pipe
+      // or character device), we can't trust the size. Create the memory
       // buffer by copying off the stream.
-      if (S_ISFIFO(FileInfo.st_mode)) {
+      if (!S_ISREG(FileInfo.st_mode) && !S_ISBLK(FileInfo.st_mode)) {
         return getMemoryBufferForStream(FD, Filename, result);
       }