r278457 - [VFS] Skip non existent files from the VFS tree
Bruno Cardoso Lopes via cfe-commits
cfe-commits at lists.llvm.org
Thu Aug 11 18:51:04 PDT 2016
Author: bruno
Date: Thu Aug 11 20:51:04 2016
New Revision: 278457
URL: http://llvm.org/viewvc/llvm-project?rev=278457&view=rev
Log:
[VFS] Skip non existent files from the VFS tree
When the VFS uses a YAML file, the real file path for a
virtual file is described in the "external-contents" field. Example:
...
{
'type': 'file',
'name': 'a.h',
'external-contents': '/a/b/c/a.h'
}
Currently, when parsing umbrella directories, we use
vfs::recursive_directory_iterator to gather the header files to generate the
equivalent modules for. If the external contents for a header does not exist,
we currently are unable to build a module, since the VFS
vfs::recursive_directory_iterator will fail when it finds an entry without a
reliable real path.
Since the YAML file could be prepared ahead of time and shared among
different compiler invocations, an entry might not yet have a reliable
path in 'external-contents', breaking the iteration.
Give the VFS the capability to skip such entries whenever
'ignore-non-existent-contents' property is set in the YAML file.
rdar://problem/27531549
Added:
cfe/trunk/test/VFS/Inputs/Bar.framework/
cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/
cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/A.h
cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/B.h
cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/C.h
cfe/trunk/test/VFS/Inputs/Bar.framework/Modules/
cfe/trunk/test/VFS/Inputs/Bar.framework/Modules/module.modulemap
cfe/trunk/test/VFS/Inputs/bar-headers.yaml
cfe/trunk/test/VFS/umbrella-framework-import-skipnonexist.m
Modified:
cfe/trunk/lib/Basic/VirtualFileSystem.cpp
Modified: cfe/trunk/lib/Basic/VirtualFileSystem.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/VirtualFileSystem.cpp?rev=278457&r1=278456&r2=278457&view=diff
==============================================================================
--- cfe/trunk/lib/Basic/VirtualFileSystem.cpp (original)
+++ cfe/trunk/lib/Basic/VirtualFileSystem.cpp Thu Aug 11 20:51:04 2016
@@ -1778,29 +1778,47 @@ VFSFromYamlDirIterImpl::VFSFromYamlDirIt
RedirectingDirectoryEntry::iterator Begin,
RedirectingDirectoryEntry::iterator End, std::error_code &EC)
: Dir(_Path.str()), FS(FS), Current(Begin), End(End) {
- if (Current != End) {
+ while (Current != End) {
SmallString<128> PathStr(Dir);
llvm::sys::path::append(PathStr, (*Current)->getName());
llvm::ErrorOr<vfs::Status> S = FS.status(PathStr);
- if (S)
+ if (S) {
CurrentEntry = *S;
- else
+ return;
+ }
+ // Skip entries which do not map to a reliable external content.
+ if (FS.ignoreNonExistentContents() &&
+ S.getError() == llvm::errc::no_such_file_or_directory) {
+ ++Current;
+ continue;
+ } else {
EC = S.getError();
+ break;
+ }
}
}
std::error_code VFSFromYamlDirIterImpl::increment() {
assert(Current != End && "cannot iterate past end");
- if (++Current != End) {
+ while (++Current != End) {
SmallString<128> PathStr(Dir);
llvm::sys::path::append(PathStr, (*Current)->getName());
llvm::ErrorOr<vfs::Status> S = FS.status(PathStr);
- if (!S)
- return S.getError();
+ if (!S) {
+ // Skip entries which do not map to a reliable external content.
+ if (FS.ignoreNonExistentContents() &&
+ S.getError() == llvm::errc::no_such_file_or_directory) {
+ continue;
+ } else {
+ return S.getError();
+ }
+ }
CurrentEntry = *S;
- } else {
- CurrentEntry = Status();
+ break;
}
+
+ if (Current == End)
+ CurrentEntry = Status();
return std::error_code();
}
Added: cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/A.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/A.h?rev=278457&view=auto
==============================================================================
--- cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/A.h (added)
+++ cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/A.h Thu Aug 11 20:51:04 2016
@@ -0,0 +1 @@
+// A.h
Added: cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/B.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/B.h?rev=278457&view=auto
==============================================================================
--- cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/B.h (added)
+++ cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/B.h Thu Aug 11 20:51:04 2016
@@ -0,0 +1 @@
+// B.h
Added: cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/C.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/C.h?rev=278457&view=auto
==============================================================================
--- cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/C.h (added)
+++ cfe/trunk/test/VFS/Inputs/Bar.framework/Headers/C.h Thu Aug 11 20:51:04 2016
@@ -0,0 +1 @@
+// C.h
Added: cfe/trunk/test/VFS/Inputs/Bar.framework/Modules/module.modulemap
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/VFS/Inputs/Bar.framework/Modules/module.modulemap?rev=278457&view=auto
==============================================================================
--- cfe/trunk/test/VFS/Inputs/Bar.framework/Modules/module.modulemap (added)
+++ cfe/trunk/test/VFS/Inputs/Bar.framework/Modules/module.modulemap Thu Aug 11 20:51:04 2016
@@ -0,0 +1,6 @@
+framework module Bar [extern_c] {
+ umbrella "Headers"
+ export *
+ module * { export * }
+}
+
Added: cfe/trunk/test/VFS/Inputs/bar-headers.yaml
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/VFS/Inputs/bar-headers.yaml?rev=278457&view=auto
==============================================================================
--- cfe/trunk/test/VFS/Inputs/bar-headers.yaml (added)
+++ cfe/trunk/test/VFS/Inputs/bar-headers.yaml Thu Aug 11 20:51:04 2016
@@ -0,0 +1,39 @@
+{
+ 'version': 0,
+ 'case-sensitive': 'false',
+ 'ignore-non-existent-contents': 'true',
+ 'roots': [
+ {
+ 'type': 'directory',
+ 'name': "VDIR/Bar.framework/Headers",
+ 'contents': [
+ {
+ 'type': 'file',
+ 'name': "A.h",
+ 'external-contents': "OUT_DIR/Bar.framework/Headers/A.h"
+ },
+ {
+ 'type': 'file',
+ 'name': "B.h",
+ 'external-contents': "OUT_DIR/Bar.framework/Headers/B.h"
+ },
+ {
+ 'type': 'file',
+ 'name': "C.h",
+ 'external-contents': "OUT_DIR/Bar.framework/Headers/C.h"
+ }
+ ]
+ },
+ {
+ 'type': 'directory',
+ 'name': "VDIR/Bar.framework/Modules",
+ 'contents': [
+ {
+ 'type': 'file',
+ 'name': "module.modulemap",
+ 'external-contents': "OUT_DIR/Bar.framework/Modules/module.modulemap"
+ }
+ ]
+ },
+ ]
+}
Added: cfe/trunk/test/VFS/umbrella-framework-import-skipnonexist.m
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/VFS/umbrella-framework-import-skipnonexist.m?rev=278457&view=auto
==============================================================================
--- cfe/trunk/test/VFS/umbrella-framework-import-skipnonexist.m (added)
+++ cfe/trunk/test/VFS/umbrella-framework-import-skipnonexist.m Thu Aug 11 20:51:04 2016
@@ -0,0 +1,14 @@
+// REQUIRES: crash-recovery, shell
+
+// FIXME: This XFAIL is cargo-culted from crash-report.c. Do we need it?
+// XFAIL: mingw32
+
+// RUN: rm -rf %t
+// RUN: mkdir -p %t/vdir %t/outdir %t/cache
+// RUN: cp -a %S/Inputs/Bar.Framework %t/outdir
+//
+// RUN: sed -e "s:VDIR:%t/vdir:g" -e "s:OUT_DIR:%t/outdir:g" %S/Inputs/bar-headers.yaml > %t/vdir/bar-headers.yaml
+// RUN: rm -f %t/outdir/Bar.framework/Headers/B.h
+// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t/cache -ivfsoverlay %t/vdir/bar-headers.yaml -F %t/vdir -fsyntax-only %s
+
+ at import Bar;
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