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* [codeview,pdb] Try really hard to conserve memory when reading.Zachary Turner2016-05-272-29/+64
| | | | | | | | | | | | | | | | | | | | | | | | | | | PDBs can be extremely large. We're already mapping the entire PDB into the process's address space, but to make matters worse the blocks of the PDB are not arranged contiguously. So, when we have something like an array or a string embedded into the stream, we have to make a copy. Since it's convenient to use traditional data structures to iterate and manipulate these records, we need the memory to be contiguous. As a result of this, we were using roughly twice as much memory as the file size of the PDB, because every stream was copied out and re-stitched together contiguously. This patch addresses this by improving the MappedBlockStream to allocate from a BumpPtrAllocator only when a read requires a discontiguous read. Furthermore, it introduces some data structures backed by a stream which can iterate over both fixed and variable length records of a PDB. Since everything is backed by a stream and not a buffer, we can read almost everything from the PDB with zero copies. Differential Revision: http://reviews.llvm.org/D20654 Reviewed By: ruiu llvm-svn: 270951
* [codeview] Move StreamInterface and StreamReader to libcodeview.Zachary Turner2016-05-254-0/+191
| | | | | | | | | | We have need to reuse this functionality, including making additional generic stream types that are smarter about how and when they copy memory versus referencing the original memory. So all of these structures belong in the common library rather than being pdb specific. llvm-svn: 270751
* [codeview] Add support for new types and symbols.Zachary Turner2016-05-252-0/+19
| | | | | | | | | | | | This patch adds support for: S_EXPORT LF_BITFIELD With this patch, I have run through a couple of gigabytes of PDB files and cannot find a type or symbol that we do not understand. llvm-svn: 270637
* [codeview] Add support for S_EXPORT symbol.Zachary Turner2016-05-251-0/+16
| | | | llvm-svn: 270636
* [codeview] Add support for new type records.Zachary Turner2016-05-241-1/+182
| | | | | | | | | | | | | | | | | | | This adds support for parsing and dumping the following symbol types: S_LPROCREF S_ENVBLOCK S_COMPILE2 S_REGISTER S_COFFGROUP S_SECTION S_THUNK32 S_TRAMPOLINE As of this patch, the test PDB files no longer have any unknown symbol types. llvm-svn: 270628
* [codeview, pdb] Dump symbol records in publics streamZachary Turner2016-05-241-0/+17
| | | | | | | Differential Revision: http://reviews.llvm.org/D20580 Reviewed By: ruiu llvm-svn: 270597
* Fix build errorsZachary Turner2016-05-241-2/+2
| | | | llvm-svn: 270587
* Dump symbol record details in llvm-pdbdumpZachary Turner2016-05-242-8/+15
| | | | | | | | | | | | | This makes use of the newly introduced `CVSymbolVisitor` to dump details of each type of symbol record in the symbol streams. Future patches will bring this visitor based dumping to the publics stream, as well as creating a `SymbolDumpDelegate` to print more information about relocations etc. Differential Revision: http://reviews.llvm.org/D20545 Reviewed By: ruiu llvm-svn: 270585
* Remove unused variable.Zachary Turner2016-05-241-11/+6
| | | | llvm-svn: 270516
* Make a symbol visitor and use it to dump CV symbols.Zachary Turner2016-05-232-0/+671
| | | | | | | Differential Revision: http://reviews.llvm.org/D20534 Reviewed By: rnk llvm-svn: 270511
* [codeview] Test serialization of all known type recordsReid Kleckner2016-05-171-2/+2
| | | | | | | | | | | This just checks that we emit all type records once, and then after merging the type stream with no other type streams, we still emit every kind of type record. We could test the dumper output more closely, but that would make the test very brittle. Currently we're just getting coverage. llvm-svn: 269778
* [codeview] Add type stream merging prototypeReid Kleckner2016-05-147-88/+504
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: This code is intended to be used as part of LLD's PDB writing. Until that exists, this is exposed via llvm-readobj for testing purposes. Type stream merging uses the following algorithm: - Begin with a new empty stream, and a new empty hash table that maps from type record contents to new type index. - For each new type stream, maintain a map from source type index to destination type index. - For each record, copy it and rewrite its type indices to be valid in the destination type stream. - If the new type record is not already present in the destination stream hash table, append it to the destination type stream, assign it the next type index, and update the two hash tables. - If the type record already exists in the destination stream, discard it and update the type index map to forward the source type index to the existing destination type index. Reviewers: zturner, ruiu Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D20122 llvm-svn: 269521
* [codeview] Align class and print names of typesReid Kleckner2016-05-135-86/+80
| | | | | | | | | | | | Summary: This way we can get rid of one of the fields in the .def file. Reviewers: llvm-commits Subscribers: zturner Differential Revision: http://reviews.llvm.org/D20251 llvm-svn: 269461
* [codeview] Dump the type index on the first line of each recordReid Kleckner2016-05-131-2/+2
| | | | | | This will make it easier to write FileCheck tests. llvm-svn: 269444
* Get rid of CVLeafTypes.def and combine with TypeRecords.defZachary Turner2016-05-121-26/+17
| | | | | | | | | | This merges the functionality of the macros in `CVLeafTypes.def` and the macros in `TypeRecords.def` into a single set of macros. Differential Revision: http://reviews.llvm.org/D20190 Reviewed By: rnk, amccarth llvm-svn: 269316
* Make CodeView record serialization more generic.Zachary Turner2016-05-123-98/+158
| | | | | | | | | | | This introduces a variadic template and some helper macros to safely and correctly deserialize many types of common record fields while maintaining error checking. Differential Revision: http://reviews.llvm.org/D20183 Reviewed By: rnk, amccarth llvm-svn: 269315
* Fix build breakage in DebugInfoCodeviewZachary Turner2016-05-111-1/+1
| | | | llvm-svn: 269217
* Refactor CodeView type records to use common code.Zachary Turner2016-05-114-373/+267
| | | | | | | Differential Revision: http://reviews.llvm.org/D20138 Reviewed By: rnk llvm-svn: 269216
* Make TypeIterator generic so it can iterate symbols too.Zachary Turner2016-05-091-1/+1
| | | | | | | Reviewed By: amccarth Differential Revision: http://reviews.llvm.org/D20038 llvm-svn: 268941
* Make llvm-pdbdump print CV type recordsZachary Turner2016-05-061-0/+6
| | | | | | | | | | This reuses the CVTypeDumper from libcodeview to dump full information about type records within a PDB file. Differential Revision: http://reviews.llvm.org/D20022 Reviewed By: rnk llvm-svn: 268808
* [codeview] Improve some commentsReid Kleckner2016-05-051-1/+0
| | | | | | | This FIXME was already fixed, and these LF_* enum names were inconsistent. llvm-svn: 268683
* Fix CVTypeDumperImpl formatting after class renameReid Kleckner2016-05-051-39/+49
| | | | llvm-svn: 268678
* [codeview] Move dumper into lib/DebugInfo/CodeViewReid Kleckner2016-05-053-0/+852
| | | | | | So that we can call it from llvm-pdbdump. llvm-svn: 268580
* [NFC] Header cleanupMehdi Amini2016-04-181-1/+0
| | | | | | | | | | | | | | Removed some unused headers, replaced some headers with forward class declarations. Found using simple scripts like this one: clear && ack --cpp -l '#include "llvm/ADT/IndexedMap.h"' | xargs grep -L 'IndexedMap[<]' | xargs grep -n --color=auto 'IndexedMap' Patch by Eugene Kosov <claprix@yandex.ru> Differential Revision: http://reviews.llvm.org/D19219 From: Mehdi Amini <mehdi.amini@apple.com> llvm-svn: 266595
* Remove autoconf supportChris Bieneman2016-01-261-14/+0
| | | | | | | | | | | | | | | | Summary: This patch is provided in preparation for removing autoconf on 1/26. The proposal to remove autoconf on 1/26 was discussed on the llvm-dev thread here: http://lists.llvm.org/pipermail/llvm-dev/2016-January/093875.html "I felt a great disturbance in the [build system], as if millions of [makefiles] suddenly cried out in terror and were suddenly silenced. I fear something [amazing] has happened." - Obi Wan Kenobi Reviewers: chandlerc, grosbach, bob.wilson, tstellarAMD, echristo, whitequark Subscribers: chfast, simoncook, emaste, jholewinski, tberghammer, jfb, danalbert, srhines, arsenm, dschuff, jyknight, dsanders, joker.eph, llvm-commits Differential Revision: http://reviews.llvm.org/D16471 llvm-svn: 258861
* Fix several accidental DOS line endings in source filesDimitry Andric2016-01-031-14/+14
| | | | | | | | | | | | | | | Summary: There are a number of files in the tree which have been accidentally checked in with DOS line endings. Convert these to native line endings. There are also a few files which have DOS line endings on purpose, and I have set the svn:eol-style property to 'CRLF' on those. Reviewers: joerg, aaron.ballman Subscribers: aaron.ballman, sanjoy, dsanders, llvm-commits Differential Revision: http://reviews.llvm.org/D15848 llvm-svn: 256707
* Remove unused constants from TypeTableBuilder.cpp.Dave Bartolomeo2015-12-241-4/+0
| | | | llvm-svn: 256389
* Fix case of path nameBill Seurer2015-12-241-1/+1
| | | | llvm-svn: 256388
* Fix CodeView library name and non-CMake buildsDave Bartolomeo2015-12-243-4/+21
| | | | llvm-svn: 256387
* LLVM CodeView libraryDave Bartolomeo2015-12-249-0/+667
Summary: This diff is the initial implementation of the LLVM CodeView library. There is much more work to be done, namely a CodeView dumper and tests. This patch should help others make progress on the LLVM->CodeView debug info emission while I continue with the implementation of the dumper and tests. This library implements support for emitting debug info in the CodeView format. This phase of the implementation only includes support for CodeView type records. Clients that need to emit type records will use a class derived from TypeTableBuilder. TypeTableBuilder provides member functions for writing each kind of type record; each of these functions eventually calls the writeRecord virtual function to emit the actual bits of the record. Derived classes override writeRecord to implement the folding of duplicate records and the actual emission to the appropriate destination. LLVMCodeView provides MemoryTypeTableBuilder, which creates the table in memory. In the future, other classes derived from TypeTableBuilder will write to other destinations, such as the type stream in a PDB. The rest of the types in LLVMCodeView define the actual CodeView type records and all of the supporting enums and other types used in the type records. The TypeIndex class is of particular interest, because it is used by clients as a handle to a type in the type table. The library provides a relatively low-level interface based on the actual on-disk format of CodeView. For example, type records refer to other type records by TypeIndex, rather than by an actual pointer to the referent record. This allows clients to emit type records one at a time, rather than having to keep the entire transitive closure of type records in memory until everything has been emitted. At some point, having a higher-level interface layered on top of this one may be useful for debuggers and other tools that want a more holistic view of the debug info. The lower-level interface should be sufficient for compilers and linkers to do the debug info manipulation that they need to do efficiently. Reviewers: rnk, majnemer Subscribers: silvas, rnk, jevinskie, llvm-commits Differential Revision: http://reviews.llvm.org/D14961 llvm-svn: 256385
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