Fix a real temp file leak in FileOutputBuffer

If we failed to commit the buffer but did not die to a signal, the temp
file would remain on disk on Windows. Having an open file mapping and
file handle prevents the file from being deleted. I am choosing not to
add an assertion of success on the temp file removal, since virus
scanners and other environmental things can often cause removal to fail
in real world tools.

Also fix more temp file leaks in unit tests.

llvm-svn: 280445
diff --git a/llvm/unittests/Support/FileOutputBufferTest.cpp b/llvm/unittests/Support/FileOutputBufferTest.cpp
index 090c476..53a2ae0 100644
--- a/llvm/unittests/Support/FileOutputBufferTest.cpp
+++ b/llvm/unittests/Support/FileOutputBufferTest.cpp
@@ -20,9 +20,12 @@
 
 #define ASSERT_NO_ERROR(x)                                                     \
   if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
-    errs() << #x ": did not return errc::success.\n"                           \
-           << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"           \
-           << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";       \
+    SmallString<128> MessageStorage;                                           \
+    raw_svector_ostream Message(MessageStorage);                               \
+    Message << #x ": did not return errc::success.\n"                          \
+            << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
+            << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
+    GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
   } else {                                                                     \
   }
 
@@ -57,9 +60,9 @@
   ASSERT_EQ(File1Size, 8192ULL);
   ASSERT_NO_ERROR(fs::remove(File1.str()));
 
- 	// TEST 2: Verify abort case.
+  // TEST 2: Verify abort case.
   SmallString<128> File2(TestDirectory);
-	File2.append("/file2");
+  File2.append("/file2");
   {
     ErrorOr<std::unique_ptr<FileOutputBuffer>> Buffer2OrErr =
         FileOutputBuffer::create(File2, 8192);
diff --git a/llvm/unittests/Support/Path.cpp b/llvm/unittests/Support/Path.cpp
index 0c61229..bd12b3b 100644
--- a/llvm/unittests/Support/Path.cpp
+++ b/llvm/unittests/Support/Path.cpp
@@ -488,6 +488,8 @@
      fs::createUniqueDirectory("dir2", Dir2));
   ASSERT_NO_ERROR(fs::getUniqueID(Dir2.c_str(), F2));
   ASSERT_NE(F1, F2);
+  ASSERT_NO_ERROR(fs::remove(Dir1));
+  ASSERT_NO_ERROR(fs::remove(Dir2));
   ASSERT_NO_ERROR(fs::remove(TempPath2));
   ASSERT_NO_ERROR(fs::remove(TempPath));
 }
diff --git a/llvm/unittests/Support/raw_pwrite_stream_test.cpp b/llvm/unittests/Support/raw_pwrite_stream_test.cpp
index 8885567..65625fc 100644
--- a/llvm/unittests/Support/raw_pwrite_stream_test.cpp
+++ b/llvm/unittests/Support/raw_pwrite_stream_test.cpp
@@ -17,13 +17,15 @@
 
 #define ASSERT_NO_ERROR(x)                                                     \
   if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
-    errs() << #x ": did not return errc::success.\n"                           \
-           << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"           \
-           << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";       \
+    SmallString<128> MessageStorage;                                           \
+    raw_svector_ostream Message(MessageStorage);                               \
+    Message << #x ": did not return errc::success.\n"                          \
+            << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
+            << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
+    GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
   } else {                                                                     \
   }
 
-
 namespace {
 
 TEST(raw_pwrite_ostreamTest, TestSVector) {