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* Recommit virtual file systemBen Langmuir2014-02-201-52/+34
| | | | | | | | | | | Previously reverted in r201755 due to causing an assertion failure. I've removed the offending assertion, and taught the CompilerInstance to create a default virtual file system inside createFileManager. In the future, we should be able to reach into the CompilerInvocation to customize this behaviour without breaking clients that don't care. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@201818 91177308-0d34-0410-b5e6-96231b3b80d8
* Reverting the virtual file system implementation, because it triggers an ↵Juergen Ributzka2014-02-201-34/+52
| | | | | | | | | | assertion in our internal build bots. This reverts commits 201618, 201635, 201636, 201639, 201685, 201691, and 201696. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@201755 91177308-0d34-0410-b5e6-96231b3b80d8
* Initial implementation of virtual file systemBen Langmuir2014-02-191-52/+34
| | | | | | | | | | | | This adds the minimum virtual file system support to start migrating FileManager onto the VFS. Originally discussed here: http://lists.cs.uiuc.edu/pipermail/cfe-dev/2014-February/035188.html Differential Revision: http://llvm-reviews.chandlerc.com/D2745 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@201618 91177308-0d34-0410-b5e6-96231b3b80d8
* Use llvm::sys::fs::UniqueID for windows and unix.Rafael Espindola2013-08-011-104/+27
| | | | | | | | | | | | | | | | | | | This unifies the unix and windows versions of FileManager::UniqueDirContainer and FileManager::UniqueFileContainer by using UniqueID. We cannot just replace "struct stat" with llvm::sys::fs::file_status, since we want to be able to construct fake ones, and file_status has different members on unix and windows. What the patch does is: * Record only the information that clang is actually using. * Use llvm::sys::fs::status instead of stat and fstat. * Use llvm::sys::fs::UniqueID * Delete the old windows versions of UniqueDirContainer and UniqueFileContainer since the "unix" one now works on windows too. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@187619 91177308-0d34-0410-b5e6-96231b3b80d8
* Convert a use of stat with sys::fs::status.Rafael Espindola2013-07-291-3/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@187364 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix handling of "clang c:foo"Rafael Espindola2013-07-291-0/+10
| | | | | | | | | | | | | On windows, c:foo is a valid file path, but stat fails on just "c:". This causes a problem for clang since its file manager wants to cache data about the parent directory. There are refactorings to be done in here, but this gives clang the correct behavior and testing first. Patch by Yunzhong Gao! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@187359 91177308-0d34-0410-b5e6-96231b3b80d8
* Use SmallVectorImpl instead of SmallVector for iterators and references to ↵Craig Topper2013-07-041-1/+1
| | | | | | avoid specifying the vector size unnecessarily. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@185610 91177308-0d34-0410-b5e6-96231b3b80d8
* <limits.h> includes <linux/limits.h> on Linux, no need to special-case itDmitri Gribenko2013-01-261-3/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173578 91177308-0d34-0410-b5e6-96231b3b80d8
* Since we're stuck with realpath for the header <-> module mapping,Douglas Gregor2013-01-261-0/+28
| | | | | | | | | factor the realpath calls into FileManager::getCanonicalName() so we can cache the results of this epically slow operation. 5% speedup on my modules test, and realpath drops out of the profile. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173542 91177308-0d34-0410-b5e6-96231b3b80d8
* Extend stat query APIs to explicitly specify if the query is forArgyrios Kyrtzidis2012-12-111-12/+8
| | | | | | | | | | a file or directory, allowing just a stat call if a file descriptor is not needed. Doing just 'stat' is faster than 'open/fstat/close'. This has the effect of cutting down system time for validating the input files of a PCH. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169831 91177308-0d34-0410-b5e6-96231b3b80d8
* Sort all of Clang's files under 'lib', and fix up the broken headersChandler Carruth2012-12-041-2/+2
| | | | | | | | | | | | | uncovered. This required manually correcting all of the incorrect main-module headers I could find, and running the new llvm/utils/sort_includes.py script over the files. I also manually added quite a few missing headers that were uncovered by shuffling the order or moving headers up to be main-module-headers. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169237 91177308-0d34-0410-b5e6-96231b3b80d8
* Basic: Windows doesn't define S_IFIFO.Daniel Dunbar2012-11-061-1/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167468 91177308-0d34-0410-b5e6-96231b3b80d8
* Frontend: Add support for reading named pipes as the main file.Daniel Dunbar2012-11-051-0/+4
| | | | | | | | - The whole {File,Source}Manager is built around wanting to pre-determine the size of files, so we can't fit this in naturally. Instead, we handle it like we do STDIN, where we just replace the main file contents upfront. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167419 91177308-0d34-0410-b5e6-96231b3b80d8
* Fixes a segfault in Tooling when using pch's:Manuel Klimek2012-07-311-0/+4
| | | | | | | | | | Clear the FileManager's stat cache in between running translation units, as the stat cache loaded from a pch is only valid for one compiler invocation. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161047 91177308-0d34-0410-b5e6-96231b3b80d8
* Introduce a flag in SourceManager to treat non-system source filesArgyrios Kyrtzidis2012-07-111-5/+11
| | | | | | | | | | | | | | | | | | | | as "volatile", meaning there's a high enough chance that they may change while we are trying to use them. This flag is only enabled by libclang. Currently "volatile" source files will be stat'ed immediately before opening them, because the file size stat info may not be accurate since when we got it (e.g. from the PCH). This avoids crashes when trying to reference mmap'ed memory from a file whose size is not what we expect. Note that there's still a window for a racing issue to occur but the window for it should be way smaller than before. We can consider later on to avoid mmap completely on such files. rdar://11612916 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160074 91177308-0d34-0410-b5e6-96231b3b80d8
* LLVM_ON_WIN32 case: use the proper key in the UniqueFiles map.Axel Naumann2012-07-111-1/+7
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160041 91177308-0d34-0410-b5e6-96231b3b80d8
* Improve r159256 following Chandler's comments:Axel Naumann2012-07-101-10/+9
| | | | | | | Implement UniqueFileContainer::erase(), camelCase, add comment on future optimizations of the cache versus de-optimizations of invalidations. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159997 91177308-0d34-0410-b5e6-96231b3b80d8
* Fix for r159256 on Windows.Axel Naumann2012-06-271-0/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159262 91177308-0d34-0410-b5e6-96231b3b80d8
* From Vassil Vassilev:Axel Naumann2012-06-271-0/+13
| | | | | | | | add interface for removing a FileEntry from the cache. Forces a re-read the contents from disk, e.g. because a tool (like cling) wants to pick up a modified file. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159256 91177308-0d34-0410-b5e6-96231b3b80d8
* clang/lib/Basic/FileManager.cpp: Detect the root directory with PathV2. It ↵NAKAMURA Takumi2012-06-161-2/+4
| | | | | | should be better fix for PR10331, or, "clang X:\foo.c" fails. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158596 91177308-0d34-0410-b5e6-96231b3b80d8
* Documentation cleanup: delete doc comments from source files where they areJames Dennett2012-06-151-7/+0
| | | | | | | | broken duplicates of comments that are in the corresponding header files. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158550 91177308-0d34-0410-b5e6-96231b3b80d8
* [PCH] When validating that the files coming from PCH did not change, alsoArgyrios Kyrtzidis2012-05-031-0/+6
| | | | | | | | | | | validate that we didn't override the contents of any of such files. If this is detected, emit a diagnostic error and recover gracefully by using the contents of the original file that the PCH was built from. Part of rdar://11305263 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156107 91177308-0d34-0410-b5e6-96231b3b80d8
* Basic: import SmallString<> into clang namespaceDylan Noblesmith2012-02-051-5/+5
| | | | | | | (I was going to fix the TODO about DenseMap too, but that would break self-host right now. See PR11922.) git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149799 91177308-0d34-0410-b5e6-96231b3b80d8
* Basic: import OwningPtr<> into clang namespaceDylan Noblesmith2012-02-051-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149798 91177308-0d34-0410-b5e6-96231b3b80d8
* remove unneeded config.h includesDylan Noblesmith2011-12-221-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147195 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r132539 for now, "My testing shows that function stat has no problem ↵NAKAMURA Takumi2011-11-171-0/+6
| | | | | | | | with trailing separators. (tested on Windows and Darwin)." It caused PR10331. MSVCRT stat() cannot strip trailing '/'. (can '\') git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@144884 91177308-0d34-0410-b5e6-96231b3b80d8
* Use StringRef's case transformation methods.Benjamin Kramer2011-11-061-3/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@143889 91177308-0d34-0410-b5e6-96231b3b80d8
* For modules, use a hash of the compiler version, language options, andDouglas Gregor2011-09-131-12/+22
| | | | | | | | | | target triple to separate modules built under different conditions. The hash is used to create a subdirectory in the module cache path where other invocations of the compiler (with the same version, language options, etc.) can find the precompiled modules. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@139662 91177308-0d34-0410-b5e6-96231b3b80d8
* When an import statement fails to find a module in the module cache,Douglas Gregor2011-09-121-0/+4
| | | | | | | | | | but there is a corresponding umbrella header in a framework, build the module on-the-fly so it can be immediately loaded at the import statement. This is very much proof-of-concept code, with details to be fleshed out over time. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@139558 91177308-0d34-0410-b5e6-96231b3b80d8
* remove unneeded llvm:: namespace qualifiers on some core types now that ↵Chris Lattner2011-07-231-13/+13
| | | | | | | | | LLVM.h imports them into the clang namespace. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@135852 91177308-0d34-0410-b5e6-96231b3b80d8
* My testing shows that function stat has no problem with trailing separators. ↵Francois Pichet2011-06-031-4/+0
| | | | | | | | | | | (tested on Windows and Darwin). This fixes a bug on Windows: clang c:\test.cpp Here the call stat("c:") is not recognized as a directory (must be "c:\"). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@132539 91177308-0d34-0410-b5e6-96231b3b80d8
* Add FileManager::getNoncachedStatValue, which will resolve relative paths ↵Anders Carlsson2011-03-181-0/+8
| | | | | | against the working directory specified in the file system options. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127893 91177308-0d34-0410-b5e6-96231b3b80d8
* Having FileManager::getFile always open the file, brought much consternation ↵Argyrios Kyrtzidis2011-03-161-1/+6
| | | | | | | | | | | and leaking of file descriptors. Add 'openFile' bool to FileManager::getFile to specify whether we want to have the file opened or not, have it false by default, and enable it only in HeaderSearch.cpp where the open+fstat optimization matters. Fixes rdar://9139899. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127748 91177308-0d34-0410-b5e6-96231b3b80d8
* Stop leaking file descriptors.Argyrios Kyrtzidis2011-03-151-14/+16
| | | | | | | | After the open+fstat optimization, files were already opened for FileManager::getBufferForFile() and we closed them after reading them. The problem was that when -working-directory was passed, the code path that actually reuses & closes the already opened file descriptor was not followed. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127639 91177308-0d34-0410-b5e6-96231b3b80d8
* Get rid of the static FileManager::FixupRelativePath.Anders Carlsson2011-03-141-8/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127573 91177308-0d34-0410-b5e6-96231b3b80d8
* Check in the implementation as well...Anders Carlsson2011-03-071-3/+7
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127144 91177308-0d34-0410-b5e6-96231b3b80d8
* Convert FileManager::FixupRelativePath over to using PathV2.Anders Carlsson2011-03-061-8/+10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127133 91177308-0d34-0410-b5e6-96231b3b80d8
* Uses llvm::sys::path instead of hand-rolled algorithm in FileManager.Zhanyong Wan2011-02-111-32/+11
| | | | | | | Reviewed by dgregor. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125407 91177308-0d34-0410-b5e6-96231b3b80d8
* Improves Clang's virtual file handling.Zhanyong Wan2011-02-111-85/+146
| | | | | | | | | | | | | | | | | | | | | | | | | This patch contains: - making some of the existing comments more accurate in the presence of virtual files/directories. - renaming some private data members of FileManager to match their roles better. - creating 'DirectorEntry's for the parent directories of virtual files, such that we can tell whether two virtual files are from the same directory. This is useful for injecting virtual files whose directories don't exist in the real file system. - minor clean-ups and adding comments for class FileManager::UniqueDirContainer and FileManager::UniqueFileContainer. - adding statistics on virtual files to FileManager::PrintStats(). - adding unit tests to verify the existing and new behavior of FileManager. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125384 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement two related optimizations that make de-serialization ofDouglas Gregor2011-02-101-0/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | AST/PCH files more lazy: - Don't preload all of the file source-location entries when reading the AST file. Instead, load them lazily, when needed. - Only look up header-search information (whether a header was already #import'd, how many times it's been included, etc.) when it's needed by the preprocessor, rather than pre-populating it. Previously, we would pre-load all of the file source-location entries, which also populated the header-search information structure. This was a relatively minor performance issue, since we would end up stat()'ing all of the headers stored within a AST/PCH file when the AST/PCH file was loaded. In the normal PCH use case, the stat()s were cached, so the cost--of preloading ~860 source-location entries in the Cocoa.h case---was relatively low. However, the recent optimization that replaced stat+open with open+fstat turned this into a major problem, since the preloading of source-location entries would now end up opening those files. Worse, those files wouldn't be closed until the file manager was destroyed, so just opening a Cocoa.h PCH file would hold on to ~860 file descriptors, and it was easy to blow through the process's limit on the number of open file descriptors. By eliminating the preloading of these files, we neither open nor stat the headers stored in the PCH/AST file until they're actually needed for something. Concretely, we went from *** HeaderSearch Stats: 835 files tracked. 364 #import/#pragma once files. 823 included exactly once. 6 max times a file is included. 3 #include/#include_next/#import. 0 #includes skipped due to the multi-include optimization. 1 framework lookups. 0 subframework lookups. *** Source Manager Stats: 835 files mapped, 3 mem buffers mapped. 37460 SLocEntry's allocated, 11215575B of Sloc address space used. 62 bytes of files mapped, 0 files with line #'s computed. with a trivial program that uses a chained PCH including a Cocoa PCH to *** HeaderSearch Stats: 4 files tracked. 1 #import/#pragma once files. 3 included exactly once. 2 max times a file is included. 3 #include/#include_next/#import. 0 #includes skipped due to the multi-include optimization. 1 framework lookups. 0 subframework lookups. *** Source Manager Stats: 3 files mapped, 3 mem buffers mapped. 37460 SLocEntry's allocated, 11215575B of Sloc address space used. 62 bytes of files mapped, 0 files with line #'s computed. for the same program. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125286 91177308-0d34-0410-b5e6-96231b3b80d8
* Update for API change.Rafael Espindola2011-02-081-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125129 91177308-0d34-0410-b5e6-96231b3b80d8
* Improve our uniquing of file entries when files are re-saved or areDouglas Gregor2011-02-051-21/+36
| | | | | | | | | | | | | | | | overridden via remapping. Thus, when we create a "virtual" file in the file manager, we still stat() the real file that lives behind it so that we can provide proper uniquing based on inodes. This helps keep the file manager much more consistent. To take advantage of this when reparsing files in libclang, we disable the use of the stat() cache when reparsing or performing code completion, since the stat() cache is very likely to be out of date in this use case. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124971 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert 124754 and 124760 as they made clang unusable in the presence of symbolicRafael Espindola2011-02-031-84/+0
| | | | | | links. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124776 91177308-0d34-0410-b5e6-96231b3b80d8
* Improve the performance of filename canonicalization by avoidingDouglas Gregor2011-02-031-1/+8
| | | | | | | redundant searches in the string. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124760 91177308-0d34-0410-b5e6-96231b3b80d8
* Canonicalize path names in the file manager before performing a lookupDouglas Gregor2011-02-021-0/+77
| | | | | | | | | | | | | | | | | | on that name. Canonicalization eliminates silliness such as "." and "foo/.." that breaks the uniquing of files in the presence of virtual files or files whose inode numbers have changed during parsing/re-parsing. c-index-test isn't able to create this crazy situation, so I've resorted to testing outside of the Clang tree. Fixes <rdar://problem/8928220>. Note that this hackery will go away once we have a real virtual file system on which we can layer FileManager; the virtual-files hack is showing cracks. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124754 91177308-0d34-0410-b5e6-96231b3b80d8
* TextDiagnosticPrinter.cpp: Show diagnostics as far as possible even with ↵Axel Naumann2011-01-271-6/+10
| | | | | | | | | | | | | | | invalid PresomedLoc, instead of just silencing it. FileManager.cpp: Allow virtual files in nonexistent directories. FileManager.cpp: Close FileDescriptor for virtual files that correspond to actual files. FileManager.cpp: Enable virtual files to be created even for files that were flagged as NON_EXISTENT_FILE, e.g. by a prior (unsuccessful) addFile(). ASTReader.cpp: Read a PCH even if the original source files cannot be found. Add a test for reading a PCH of a file that has been removed and diagnostics referencing that file. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124374 91177308-0d34-0410-b5e6-96231b3b80d8
* Replace all uses of PathV1::makeAbsolute with PathV2::fs::make_absolute.Michael J. Spencer2010-12-211-3/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122340 91177308-0d34-0410-b5e6-96231b3b80d8
* Replace all uses of PathV1::isAbsolute with PathV2::is_{absolute,relative}.Michael J. Spencer2010-12-171-4/+5
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@122087 91177308-0d34-0410-b5e6-96231b3b80d8
* MemoryBuffer API update.Michael J. Spencer2010-12-161-19/+18
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@121956 91177308-0d34-0410-b5e6-96231b3b80d8
* Use error_code instead of std::string* for MemoryBuffer.Michael J. Spencer2010-12-091-8/+27
| | | | git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@121378 91177308-0d34-0410-b5e6-96231b3b80d8
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