r261552 - [VFS] Add 'overlay-relative' field to YAML files
Bruno Cardoso Lopes via cfe-commits
cfe-commits at lists.llvm.org
Mon Feb 22 10:41:12 PST 2016
Author: bruno
Date: Mon Feb 22 12:41:09 2016
New Revision: 261552
URL: http://llvm.org/viewvc/llvm-project?rev=261552&view=rev
Log:
[VFS] Add 'overlay-relative' field to YAML files
The VFS overlay mapping between virtual paths and real paths is done through
the 'external-contents' entries in YAML files, which contains hardcoded paths
to the real files.
When a module compilation crashes, headers are dumped into <name>.cache/vfs
directory and are mapped via the <name>.cache/vfs/vfs.yaml. The script
generated for reproduction uses -ivfsoverlay pointing to file to gather the
mapping between virtual paths and files inside <name>.cache/vfs. Currently, we
are only capable of reproducing such crashes in the same machine as they
happen, because of the hardcoded paths in 'external-contents'.
To be able to reproduce a crash in another machine, this patch introduces a new
option in the VFS yaml file called 'overlay-relative'. When it's equal to
'true' it means that the provided path to the YAML file through the
-ivfsoverlay option should also be used to prefix the final path for every
'external-contents'.
Example, given the invocation snippet "... -ivfsoverlay
<name>.cache/vfs/vfs.yaml" and the following entry in the yaml file:
"overlay-relative": "true",
"roots": [
...
"type": "directory",
"name": "/usr/include",
"contents": [
{
"type": "file",
"name": "stdio.h",
"external-contents": "/usr/include/stdio.h"
},
...
Here, a file manager request for virtual "/usr/include/stdio.h", that will map
into real path "/<absolute_path_to>/<name>.cache/vfs/usr/include/stdio.h.
This is a useful feature for debugging module crashes in machines other than
the one where the error happened.
Differential Revision: http://reviews.llvm.org/D17457
rdar://problem/24499339
Added:
cfe/trunk/test/Modules/crash-vfs-relative-overlay.m
- copied, changed from r261551, cfe/trunk/test/Modules/crash-vfs-path-traversal.m
Modified:
cfe/trunk/include/clang/Basic/VirtualFileSystem.h
cfe/trunk/lib/Basic/VirtualFileSystem.cpp
cfe/trunk/lib/Frontend/CompilerInvocation.cpp
cfe/trunk/lib/Frontend/ModuleDependencyCollector.cpp
cfe/trunk/test/Modules/crash-vfs-path-symlink-component.m
cfe/trunk/test/Modules/crash-vfs-path-traversal.m
Modified: cfe/trunk/include/clang/Basic/VirtualFileSystem.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/VirtualFileSystem.h?rev=261552&r1=261551&r2=261552&view=diff
==============================================================================
--- cfe/trunk/include/clang/Basic/VirtualFileSystem.h (original)
+++ cfe/trunk/include/clang/Basic/VirtualFileSystem.h Mon Feb 22 12:41:09 2016
@@ -310,6 +310,7 @@ llvm::sys::fs::UniqueID getNextVirtualUn
IntrusiveRefCntPtr<FileSystem>
getVFSFromYAML(std::unique_ptr<llvm::MemoryBuffer> Buffer,
llvm::SourceMgr::DiagHandlerTy DiagHandler,
+ StringRef YAMLFilePath,
void *DiagContext = nullptr,
IntrusiveRefCntPtr<FileSystem> ExternalFS = getRealFileSystem());
@@ -323,6 +324,8 @@ struct YAMLVFSEntry {
class YAMLVFSWriter {
std::vector<YAMLVFSEntry> Mappings;
Optional<bool> IsCaseSensitive;
+ Optional<bool> IsOverlayRelative;
+ std::string OverlayDir;
public:
YAMLVFSWriter() {}
@@ -330,6 +333,11 @@ public:
void setCaseSensitivity(bool CaseSensitive) {
IsCaseSensitive = CaseSensitive;
}
+ void setOverlayDir(StringRef OverlayDirectory) {
+ IsOverlayRelative = true;
+ OverlayDir.assign(OverlayDirectory.str());
+ }
+
void write(llvm::raw_ostream &OS);
};
Modified: cfe/trunk/lib/Basic/VirtualFileSystem.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/VirtualFileSystem.cpp?rev=261552&r1=261551&r2=261552&view=diff
==============================================================================
--- cfe/trunk/lib/Basic/VirtualFileSystem.cpp (original)
+++ cfe/trunk/lib/Basic/VirtualFileSystem.cpp Mon Feb 22 12:41:09 2016
@@ -790,6 +790,7 @@ public:
/// All configuration options are optional.
/// 'case-sensitive': <boolean, default=true>
/// 'use-external-names': <boolean, default=true>
+/// 'overlay-relative': <boolean, default=false>
///
/// Virtual directories are represented as
/// \verbatim
@@ -832,6 +833,10 @@ class RedirectingFileSystem : public vfs
std::vector<std::unique_ptr<Entry>> Roots;
/// \brief The file system to use for external references.
IntrusiveRefCntPtr<FileSystem> ExternalFS;
+ /// If IsRelativeOverlay is set, this represents the directory
+ /// path that should be prefixed to each 'external-contents' entry
+ /// when reading from YAML files.
+ std::string ExternalContentsPrefixDir;
/// @name Configuration
/// @{
@@ -841,6 +846,10 @@ class RedirectingFileSystem : public vfs
/// Currently, case-insensitive matching only works correctly with ASCII.
bool CaseSensitive;
+ /// IsRelativeOverlay marks whether a IsExternalContentsPrefixDir path must
+ /// be prefixed in every 'external-contents' when reading from YAML files.
+ bool IsRelativeOverlay = false;
+
/// \brief Whether to use to use the value of 'external-contents' for the
/// names of files. This global value is overridable on a per-file basis.
bool UseExternalNames;
@@ -868,8 +877,8 @@ public:
/// returns a virtual file system representing its contents.
static RedirectingFileSystem *
create(std::unique_ptr<MemoryBuffer> Buffer,
- SourceMgr::DiagHandlerTy DiagHandler, void *DiagContext,
- IntrusiveRefCntPtr<FileSystem> ExternalFS);
+ SourceMgr::DiagHandlerTy DiagHandler, StringRef YAMLFilePath,
+ void *DiagContext, IntrusiveRefCntPtr<FileSystem> ExternalFS);
ErrorOr<Status> status(const Twine &Path) override;
ErrorOr<std::unique_ptr<File>> openFileForRead(const Twine &Path) override;
@@ -902,6 +911,15 @@ public:
return directory_iterator(std::make_shared<VFSFromYamlDirIterImpl>(Dir,
*this, D->contents_begin(), D->contents_end(), EC));
}
+
+ void setExternalContentsPrefixDir(StringRef PrefixDir) {
+ ExternalContentsPrefixDir = PrefixDir.str();
+ }
+
+ StringRef getExternalContentsPrefixDir() const {
+ return ExternalContentsPrefixDir;
+ }
+
};
/// \brief A helper class to hold the common YAML parsing state.
@@ -981,7 +999,7 @@ class RedirectingFileSystemParser {
return true;
}
- std::unique_ptr<Entry> parseEntry(yaml::Node *N) {
+ std::unique_ptr<Entry> parseEntry(yaml::Node *N, RedirectingFileSystem *FS) {
yaml::MappingNode *M = dyn_cast<yaml::MappingNode>(N);
if (!M) {
error(N, "expected mapping node for file or directory entry");
@@ -1057,7 +1075,7 @@ class RedirectingFileSystemParser {
for (yaml::SequenceNode::iterator I = Contents->begin(),
E = Contents->end();
I != E; ++I) {
- if (std::unique_ptr<Entry> E = parseEntry(&*I))
+ if (std::unique_ptr<Entry> E = parseEntry(&*I, FS))
EntryArrayContents.push_back(std::move(E));
else
return nullptr;
@@ -1071,12 +1089,22 @@ class RedirectingFileSystemParser {
HasContents = true;
if (!parseScalarString(I->getValue(), Value, Buffer))
return nullptr;
- SmallString<256> Path(Value);
+
+ SmallString<128> FullPath;
+ if (FS->IsRelativeOverlay) {
+ FullPath = FS->getExternalContentsPrefixDir();
+ assert(!FullPath.empty() &&
+ "External contents prefix directory must exist");
+ llvm::sys::path::append(FullPath, Value);
+ } else {
+ FullPath = Value;
+ }
+
// Guarantee that old YAML files containing paths with ".." and "." are
// properly canonicalized before read into the VFS.
- Path = sys::path::remove_leading_dotslash(Path);
- sys::path::remove_dots(Path, /*remove_dot_dot=*/true);
- ExternalContentsPath = Path.str();
+ FullPath = sys::path::remove_leading_dotslash(FullPath);
+ sys::path::remove_dots(FullPath, /*remove_dot_dot=*/true);
+ ExternalContentsPath = FullPath.str();
} else if (Key == "use-external-name") {
bool Val;
if (!parseScalarBool(I->getValue(), Val))
@@ -1162,6 +1190,7 @@ public:
KeyStatusPair("version", true),
KeyStatusPair("case-sensitive", false),
KeyStatusPair("use-external-names", false),
+ KeyStatusPair("overlay-relative", false),
KeyStatusPair("roots", true),
};
@@ -1187,7 +1216,7 @@ public:
for (yaml::SequenceNode::iterator I = Roots->begin(), E = Roots->end();
I != E; ++I) {
- if (std::unique_ptr<Entry> E = parseEntry(&*I))
+ if (std::unique_ptr<Entry> E = parseEntry(&*I, FS))
FS->Roots.push_back(std::move(E));
else
return false;
@@ -1213,6 +1242,9 @@ public:
} else if (Key == "case-sensitive") {
if (!parseScalarBool(I->getValue(), FS->CaseSensitive))
return false;
+ } else if (Key == "overlay-relative") {
+ if (!parseScalarBool(I->getValue(), FS->IsRelativeOverlay))
+ return false;
} else if (Key == "use-external-names") {
if (!parseScalarBool(I->getValue(), FS->UseExternalNames))
return false;
@@ -1233,9 +1265,11 @@ public:
Entry::~Entry() = default;
-RedirectingFileSystem *RedirectingFileSystem::create(
- std::unique_ptr<MemoryBuffer> Buffer, SourceMgr::DiagHandlerTy DiagHandler,
- void *DiagContext, IntrusiveRefCntPtr<FileSystem> ExternalFS) {
+RedirectingFileSystem *
+RedirectingFileSystem::create(std::unique_ptr<MemoryBuffer> Buffer,
+ SourceMgr::DiagHandlerTy DiagHandler,
+ StringRef YAMLFilePath, void *DiagContext,
+ IntrusiveRefCntPtr<FileSystem> ExternalFS) {
SourceMgr SM;
yaml::Stream Stream(Buffer->getMemBufferRef(), SM);
@@ -1252,6 +1286,23 @@ RedirectingFileSystem *RedirectingFileSy
std::unique_ptr<RedirectingFileSystem> FS(
new RedirectingFileSystem(ExternalFS));
+
+ if (!YAMLFilePath.empty()) {
+ // Use the YAML path from -ivfsoverlay to compute the dir to be prefixed
+ // to each 'external-contents' path.
+ //
+ // Example:
+ // -ivfsoverlay dummy.cache/vfs/vfs.yaml
+ // yields:
+ // FS->ExternalContentsPrefixDir => /<absolute_path_to>/dummy.cache/vfs
+ //
+ SmallString<256> OverlayAbsDir = sys::path::parent_path(YAMLFilePath);
+ std::error_code EC = llvm::sys::fs::make_absolute(OverlayAbsDir);
+ assert(!EC && "Overlay dir final path must be absolute");
+ (void)EC;
+ FS->setExternalContentsPrefixDir(OverlayAbsDir);
+ }
+
if (!P.parse(Root, FS.get()))
return nullptr;
@@ -1396,10 +1447,12 @@ RedirectingFileSystem::openFileForRead(c
IntrusiveRefCntPtr<FileSystem>
vfs::getVFSFromYAML(std::unique_ptr<MemoryBuffer> Buffer,
- SourceMgr::DiagHandlerTy DiagHandler, void *DiagContext,
+ SourceMgr::DiagHandlerTy DiagHandler,
+ StringRef YAMLFilePath,
+ void *DiagContext,
IntrusiveRefCntPtr<FileSystem> ExternalFS) {
return RedirectingFileSystem::create(std::move(Buffer), DiagHandler,
- DiagContext, ExternalFS);
+ YAMLFilePath, DiagContext, ExternalFS);
}
UniqueID vfs::getNextVirtualUniqueID() {
@@ -1431,7 +1484,8 @@ class JSONWriter {
public:
JSONWriter(llvm::raw_ostream &OS) : OS(OS) {}
- void write(ArrayRef<YAMLVFSEntry> Entries, Optional<bool> IsCaseSensitive);
+ void write(ArrayRef<YAMLVFSEntry> Entries, Optional<bool> IsCaseSensitive,
+ Optional<bool> IsOverlayRelative, StringRef OverlayDir);
};
}
@@ -1484,7 +1538,9 @@ void JSONWriter::writeEntry(StringRef VP
}
void JSONWriter::write(ArrayRef<YAMLVFSEntry> Entries,
- Optional<bool> IsCaseSensitive) {
+ Optional<bool> IsCaseSensitive,
+ Optional<bool> IsOverlayRelative,
+ StringRef OverlayDir) {
using namespace llvm::sys;
OS << "{\n"
@@ -1492,12 +1548,27 @@ void JSONWriter::write(ArrayRef<YAMLVFSE
if (IsCaseSensitive.hasValue())
OS << " 'case-sensitive': '"
<< (IsCaseSensitive.getValue() ? "true" : "false") << "',\n";
+ bool UseOverlayRelative = false;
+ if (IsOverlayRelative.hasValue()) {
+ UseOverlayRelative = IsOverlayRelative.getValue();
+ OS << " 'overlay-relative': '"
+ << (UseOverlayRelative ? "true" : "false") << "',\n";
+ }
OS << " 'roots': [\n";
if (!Entries.empty()) {
const YAMLVFSEntry &Entry = Entries.front();
startDirectory(path::parent_path(Entry.VPath));
- writeEntry(path::filename(Entry.VPath), Entry.RPath);
+
+ StringRef RPath = Entry.RPath;
+ if (UseOverlayRelative) {
+ unsigned OverlayDirLen = OverlayDir.size();
+ assert(RPath.substr(0, OverlayDirLen) == OverlayDir &&
+ "Overlay dir must be contained in RPath");
+ RPath = RPath.slice(OverlayDirLen, RPath.size());
+ }
+
+ writeEntry(path::filename(Entry.VPath), RPath);
for (const auto &Entry : Entries.slice(1)) {
StringRef Dir = path::parent_path(Entry.VPath);
@@ -1511,7 +1582,14 @@ void JSONWriter::write(ArrayRef<YAMLVFSE
OS << ",\n";
startDirectory(Dir);
}
- writeEntry(path::filename(Entry.VPath), Entry.RPath);
+ StringRef RPath = Entry.RPath;
+ if (UseOverlayRelative) {
+ unsigned OverlayDirLen = OverlayDir.size();
+ assert(RPath.substr(0, OverlayDirLen) == OverlayDir &&
+ "Overlay dir must be contained in RPath");
+ RPath = RPath.slice(OverlayDirLen, RPath.size());
+ }
+ writeEntry(path::filename(Entry.VPath), RPath);
}
while (!DirStack.empty()) {
@@ -1531,7 +1609,8 @@ void YAMLVFSWriter::write(llvm::raw_ostr
return LHS.VPath < RHS.VPath;
});
- JSONWriter(OS).write(Mappings, IsCaseSensitive);
+ JSONWriter(OS).write(Mappings, IsCaseSensitive, IsOverlayRelative,
+ OverlayDir);
}
VFSFromYamlDirIterImpl::VFSFromYamlDirIterImpl(
Modified: cfe/trunk/lib/Frontend/CompilerInvocation.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=261552&r1=261551&r2=261552&view=diff
==============================================================================
--- cfe/trunk/lib/Frontend/CompilerInvocation.cpp (original)
+++ cfe/trunk/lib/Frontend/CompilerInvocation.cpp Mon Feb 22 12:41:09 2016
@@ -2344,8 +2344,8 @@ createVFSFromCompilerInvocation(const Co
return IntrusiveRefCntPtr<vfs::FileSystem>();
}
- IntrusiveRefCntPtr<vfs::FileSystem> FS =
- vfs::getVFSFromYAML(std::move(Buffer.get()), /*DiagHandler*/ nullptr);
+ IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getVFSFromYAML(
+ std::move(Buffer.get()), /*DiagHandler*/ nullptr, File);
if (!FS.get()) {
Diags.Report(diag::err_invalid_vfs_overlay) << File;
return IntrusiveRefCntPtr<vfs::FileSystem>();
Modified: cfe/trunk/lib/Frontend/ModuleDependencyCollector.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/ModuleDependencyCollector.cpp?rev=261552&r1=261551&r2=261552&view=diff
==============================================================================
--- cfe/trunk/lib/Frontend/ModuleDependencyCollector.cpp (original)
+++ cfe/trunk/lib/Frontend/ModuleDependencyCollector.cpp Mon Feb 22 12:41:09 2016
@@ -51,6 +51,10 @@ void ModuleDependencyCollector::writeFil
SmallString<256> Dest = getDest();
llvm::sys::path::append(Dest, "vfs.yaml");
+ // Default to use relative overlay directories in the VFS yaml file. This
+ // allows crash reproducer scripts to work across machines.
+ VFSWriter.setOverlayDir(getDest());
+
std::error_code EC;
llvm::raw_fd_ostream OS(Dest, EC, llvm::sys::fs::F_Text);
if (EC) {
Modified: cfe/trunk/test/Modules/crash-vfs-path-symlink-component.m
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Modules/crash-vfs-path-symlink-component.m?rev=261552&r1=261551&r2=261552&view=diff
==============================================================================
--- cfe/trunk/test/Modules/crash-vfs-path-symlink-component.m (original)
+++ cfe/trunk/test/Modules/crash-vfs-path-symlink-component.m Mon Feb 22 12:41:09 2016
@@ -40,21 +40,21 @@
// CHECKSH: "-ivfsoverlay" "crash-vfs-{{[^ ]*}}.cache/vfs/vfs.yaml"
// CHECKYAML: 'type': 'directory'
-// CHECKYAML: 'name': "{{[^ ]*}}/i/usr/include",
+// CHECKYAML: 'name': "/[[PATH:.*]]/i/usr/include",
// CHECKYAML-NEXT: 'contents': [
// CHECKYAML-NEXT: {
// CHECKYAML-NEXT: 'type': 'file',
// CHECKYAML-NEXT: 'name': "module.map",
-// CHECKYAML-NEXT: 'external-contents': "{{[^ ]*}}.cache/vfs/{{[^ ]*}}/i/usr/include/module.map"
+// CHECKYAML-NEXT: 'external-contents': "/[[PATH]]/i/usr/include/module.map"
// CHECKYAML-NEXT: },
// CHECKYAML: 'type': 'directory'
-// CHECKYAML: 'name': "{{[^ ]*}}/i/usr",
+// CHECKYAML: 'name': "/[[PATH]]/i/usr",
// CHECKYAML-NEXT: 'contents': [
// CHECKYAML-NEXT: {
// CHECKYAML-NEXT: 'type': 'file',
// CHECKYAML-NEXT: 'name': "module.map",
-// CHECKYAML-NEXT: 'external-contents': "{{[^ ]*}}.cache/vfs/{{[^ ]*}}/i/usr/include/module.map"
+// CHECKYAML-NEXT: 'external-contents': "/[[PATH]]/i/usr/include/module.map"
// CHECKYAML-NEXT: },
// Test that by using the previous generated YAML file clang is able to find the
Modified: cfe/trunk/test/Modules/crash-vfs-path-traversal.m
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Modules/crash-vfs-path-traversal.m?rev=261552&r1=261551&r2=261552&view=diff
==============================================================================
--- cfe/trunk/test/Modules/crash-vfs-path-traversal.m (original)
+++ cfe/trunk/test/Modules/crash-vfs-path-traversal.m Mon Feb 22 12:41:09 2016
@@ -35,12 +35,12 @@
// CHECKSH: "-ivfsoverlay" "crash-vfs-{{[^ ]*}}.cache/vfs/vfs.yaml"
// CHECKYAML: 'type': 'directory'
-// CHECKYAML: 'name': "{{[^ ]*}}/Inputs/System/usr/include",
+// CHECKYAML: 'name': "/[[PATH:.*]]/Inputs/System/usr/include",
// CHECKYAML-NEXT: 'contents': [
// CHECKYAML-NEXT: {
// CHECKYAML-NEXT: 'type': 'file',
// CHECKYAML-NEXT: 'name': "module.map",
-// CHECKYAML-NEXT: 'external-contents': "{{[^ ]*}}/Inputs/System/usr/include/module.map"
+// CHECKYAML-NEXT: 'external-contents': "/[[PATH]]/Inputs/System/usr/include/module.map"
// CHECKYAML-NEXT: },
// Replace the paths in the YAML files with relative ".." traversals
@@ -49,9 +49,10 @@
// RUN: sed -e "s at usr/include at usr/include/../include at g" \
// RUN: %t/crash-vfs-*.cache/vfs/vfs.yaml > %t/vfs.yaml
+// RUN: cp %t/vfs.yaml %t/crash-vfs-*.cache/vfs/vfs.yaml
// RUN: unset FORCE_CLANG_DIAGNOSTICS_CRASH
// RUN: %clang -E %s -I %S/Inputs/System -isysroot %/t/i/ \
-// RUN: -ivfsoverlay %t/vfs.yaml -fmodules \
+// RUN: -ivfsoverlay %t/crash-vfs-*.cache/vfs/vfs.yaml -fmodules \
// RUN: -fmodules-cache-path=%t/m/ 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECKOVERLAY
Copied: cfe/trunk/test/Modules/crash-vfs-relative-overlay.m (from r261551, cfe/trunk/test/Modules/crash-vfs-path-traversal.m)
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Modules/crash-vfs-relative-overlay.m?p2=cfe/trunk/test/Modules/crash-vfs-relative-overlay.m&p1=cfe/trunk/test/Modules/crash-vfs-path-traversal.m&r1=261551&r2=261552&rev=261552&view=diff
==============================================================================
--- cfe/trunk/test/Modules/crash-vfs-path-traversal.m (original)
+++ cfe/trunk/test/Modules/crash-vfs-relative-overlay.m Mon Feb 22 12:41:09 2016
@@ -17,7 +17,7 @@
// RUN: find %t/crash-vfs-*.cache/vfs | \
// RUN: grep "Inputs/System/usr/include/stdio.h" | count 1
-#include "usr/././//////include/../include/./././../include/stdio.h"
+#include "usr/include/stdio.h"
// CHECK: Preprocessed source(s) and associated run script(s) are located at:
// CHECK-NEXT: note: diagnostic msg: {{.*}}.m
@@ -35,23 +35,21 @@
// CHECKSH: "-ivfsoverlay" "crash-vfs-{{[^ ]*}}.cache/vfs/vfs.yaml"
// CHECKYAML: 'type': 'directory'
-// CHECKYAML: 'name': "{{[^ ]*}}/Inputs/System/usr/include",
+// CHECKYAML: 'name': "/[[PATH:.*]]/Inputs/System/usr/include",
// CHECKYAML-NEXT: 'contents': [
// CHECKYAML-NEXT: {
// CHECKYAML-NEXT: 'type': 'file',
// CHECKYAML-NEXT: 'name': "module.map",
-// CHECKYAML-NEXT: 'external-contents': "{{[^ ]*}}/Inputs/System/usr/include/module.map"
+// CHECKYAML-NOT: 'external-contents': "{{[^ ]*}}.cache
+// CHECKYAML-NEXT: 'external-contents': "/[[PATH]]/Inputs/System/usr/include/module.map"
// CHECKYAML-NEXT: },
-// Replace the paths in the YAML files with relative ".." traversals
-// and fed into clang to test whether we're correctly representing them
-// in the VFS overlay.
+// Test that reading the YAML file will yield the correct path after
+// the overlay dir is prefixed to access headers in .cache/vfs directory.
-// RUN: sed -e "s at usr/include at usr/include/../include at g" \
-// RUN: %t/crash-vfs-*.cache/vfs/vfs.yaml > %t/vfs.yaml
// RUN: unset FORCE_CLANG_DIAGNOSTICS_CRASH
// RUN: %clang -E %s -I %S/Inputs/System -isysroot %/t/i/ \
-// RUN: -ivfsoverlay %t/vfs.yaml -fmodules \
+// RUN: -ivfsoverlay %t/crash-vfs-*.cache/vfs/vfs.yaml -fmodules \
// RUN: -fmodules-cache-path=%t/m/ 2>&1 \
// RUN: | FileCheck %s --check-prefix=CHECKOVERLAY
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