Don't open the file again in the gold plugin. To be able to do this, update

MemoryBuffer::getOpenFile to not close the file descriptor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125128 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 11 insertions, 0 deletions

diff --git a/tools/lto/LTOModule.cpp b/tools/lto/LTOModule.cpp
index e2ecabcc1c..ca937bf2ff 100644
--- a/tools/lto/LTOModule.cpp
+++ b/tools/lto/LTOModule.cpp
@@ -87,6 +87,17 @@ LTOModule *LTOModule::makeLTOModule(const char *path,
   return makeLTOModule(buffer.get(), errMsg);
 }
 
+LTOModule *LTOModule::makeLTOModule(int fd, const char *path,
+                                    off_t size,
+                                    std::string &errMsg) {
+  OwningPtr<MemoryBuffer> buffer;
+  if (error_code ec = MemoryBuffer::getOpenFile(fd, path, buffer, size)) {
+    errMsg = ec.message();
+    return NULL;
+  }
+  return makeLTOModule(buffer.get(), errMsg);
+}
+
 /// makeBuffer - Create a MemoryBuffer from a memory range.  MemoryBuffer
 /// requires the byte past end of the buffer to be a zero.  We might get lucky
 /// and already be that way, otherwise make a copy.  Also if next byte is on a