forked from OSchip/llvm-project
d878e28e67
This reapplies r261552 and r263748. Fixed testcase to reapply.
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
llvm-svn: 263893
|
||
|---|---|---|
| .. | ||
| Attributes.cpp | ||
| Builtins.cpp | ||
| CMakeLists.txt | ||
| CharInfo.cpp | ||
| Diagnostic.cpp | ||
| DiagnosticIDs.cpp | ||
| DiagnosticOptions.cpp | ||
| FileManager.cpp | ||
| FileSystemStatCache.cpp | ||
| IdentifierTable.cpp | ||
| LangOptions.cpp | ||
| Module.cpp | ||
| ObjCRuntime.cpp | ||
| OpenMPKinds.cpp | ||
| OperatorPrecedence.cpp | ||
| SanitizerBlacklist.cpp | ||
| Sanitizers.cpp | ||
| SourceLocation.cpp | ||
| SourceManager.cpp | ||
| TargetInfo.cpp | ||
| Targets.cpp | ||
| TokenKinds.cpp | ||
| Version.cpp | ||
| VersionTuple.cpp | ||
| VirtualFileSystem.cpp | ||
| Warnings.cpp | ||