teemperor updated this revision to Diff 114504.
teemperor added a comment.
Herald added a subscriber: mgorny.
- Added test case.
https://reviews.llvm.org/D37416
Files:
lib/Frontend/CompilerInstance.cpp
unittests/Frontend/CMakeLists.txt
unittests/Frontend/CompilerInstanceTest.cpp
Index: unittests/Frontend/CompilerInstanceTest.cpp
===================================================================
--- /dev/null
+++ unittests/Frontend/CompilerInstanceTest.cpp
@@ -0,0 +1,74 @@
+//===- unittests/Frontend/CompilerInstanceTest.cpp - CI tests -------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Frontend/CompilerInstance.h"
+#include "clang/Frontend/CompilerInvocation.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/ToolOutputFile.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+using namespace clang;
+
+namespace {
+
+TEST(CompilerInstance, DefaultVFSOverlayFromInvocation) {
+ // Create a temporary VFS overlay yaml file.
+ int FD;
+ SmallString<256> FileName;
+ ASSERT_FALSE(sys::fs::createTemporaryFile("vfs", "yaml", FD, FileName));
+ tool_output_file File(FileName, FD);
+
+ SmallString<256> CurrentPath;
+ sys::fs::current_path(CurrentPath);
+ sys::fs::make_absolute(CurrentPath, FileName);
+
+ // Mount the VFS file itself on the path 'virtual.file'. Makes this test
+ // a bit shorter than creating a new dummy file just for this purpose.
+ const std::string CurrentPathStr = CurrentPath.str();
+ const std::string FileNameStr = FileName.str();
+ const char *VFSYaml = "{ 'version': 0, 'roots': [\n"
+ " { 'name': '%s',\n"
+ " 'type': 'directory',\n"
+ " 'contents': [\n"
+ " { 'name': 'vfs-virtual.file', 'type': 'file',\n"
+ " 'external-contents': '%s'\n"
+ " }\n"
+ " ]\n"
+ " }\n"
+ "]}\n";
+ File.os() << format(VFSYaml, CurrentPathStr.c_str(), FileName.c_str());
+ File.os().flush();
+
+ // Create a CompilerInvocation that uses this overlay file.
+ const std::string VFSArg = "-ivfsoverlay" + FileNameStr;
+ const char *Args[] = {"clang", VFSArg.c_str(), "-xc++", "-"};
+
+ IntrusiveRefCntPtr<DiagnosticsEngine> Diags =
+ CompilerInstance::createDiagnostics(new DiagnosticOptions());
+
+ std::shared_ptr<CompilerInvocation> CInvok =
+ createInvocationFromCommandLine(Args, Diags);
+
+ if (!CInvok)
+ FAIL() << "could not create compiler invocation";
+ // Create a minimal CompilerInstance which should use the VFS we specified
+ // in the CompilerInvocation (as we don't explicitly set our own).
+ CompilerInstance Instance;
+ Instance.setDiagnostics(Diags.get());
+ Instance.setInvocation(CInvok);
+ Instance.createFileManager();
+
+ // Check if the virtual file exists which means that our VFS is used by the
+ // CompilerInstance.
+ ASSERT_TRUE(Instance.getFileManager().getFile("vfs-virtual.file"));
+}
+
+} // anonymous namespace
Index: unittests/Frontend/CMakeLists.txt
===================================================================
--- unittests/Frontend/CMakeLists.txt
+++ unittests/Frontend/CMakeLists.txt
@@ -4,6 +4,7 @@
add_clang_unittest(FrontendTests
ASTUnitTest.cpp
+ CompilerInstanceTest.cpp
FrontendActionTest.cpp
CodeGenActionTest.cpp
)
Index: lib/Frontend/CompilerInstance.cpp
===================================================================
--- lib/Frontend/CompilerInstance.cpp
+++ lib/Frontend/CompilerInstance.cpp
@@ -302,8 +302,8 @@
void CompilerInstance::createFileManager() {
if (!hasVirtualFileSystem()) {
- // TODO: choose the virtual file system based on the CompilerInvocation.
- setVirtualFileSystem(vfs::getRealFileSystem());
+ setVirtualFileSystem(
+ createVFSFromCompilerInvocation(getInvocation(), getDiagnostics()));
}
FileMgr = new FileManager(getFileSystemOpts(), VirtualFileSystem);
}
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