summaryrefslogtreecommitdiffstats
path: root/llvm/lib/DebugInfo/PDB/Raw/SymbolStream.cpp
Commit message (Collapse)AuthorAgeFilesLines
* NFC: Rename (PDB) RawSession to NativeSessionAdrian McCarthy2017-01-251-46/+0
| | | | | | | | This eliminates one overload on the term Raw. Differential Revision: https://reviews.llvm.org/D29098 llvm-svn: 293104
* [msf] Resubmit "Rename Msf -> MSF".Zachary Turner2016-07-291-2/+2
| | | | | | | | | | | | | Previously this change was submitted from a Windows machine, so changes made to the case of filenames and directory names did not survive the commit, and as a result the CMake source file names and the on-disk file names did not match on case-sensitive file systems. I'm resubmitting this patch from a Linux system, which hopefully allows the case changes to make it through unfettered. llvm-svn: 277213
* Revert "[msf] Rename Msf to MSF."Zachary Turner2016-07-291-2/+2
| | | | | | This reverts commit 4d1557ffac41e079bcb1abbcf04f512474dcd6fe. llvm-svn: 277194
* [msf] Rename Msf to MSF.Zachary Turner2016-07-291-2/+2
| | | | | | | | In a previous patch, it was suggested to use all caps instead of rolling caps for initialisms, so this patch changes everything to do this. llvm-svn: 277190
* Get rid of IMsfStreamData class.Zachary Turner2016-07-281-1/+0
| | | | | | | | | | | | | | | | | | | | This was a pure virtual base class whose purpose was to abstract away the notion of how you retrieve the layout of a discontiguous stream of blocks in an Msf file. This led to too many layers of abstraction making it difficult to figure out what was going on and extend things. Ultimately, a stream's layout is decided by its length and the array of block numbers that it lives on. So rather than have an abstract base class which can return this in any number of ways, it's more straightforward to simply store them as fields of a trivial struct, and also to give a more appropriate name. This patch does that. It renames IMsfStreamData to MsfStreamLayout, and deletes the 2 concrete implementations, DirectoryStreamData and IndexedStreamData. MsfStreamLayout is a trivial struct with the necessary data. llvm-svn: 277018
* [msf] Create LLVMDebugInfoMsfZachary Turner2016-07-221-4/+5
| | | | | | | | | | | | | | This provides a better layering of responsibilities among different aspects of PDB writing code. Some of the MSF related code was contained in CodeView, and some was in PDB prior to this. Further, we were often saying PDB when we meant MSF, and the two are actually independent of each other since in theory you can have other types of data besides PDB data in an MSF. So, this patch separates the MSF specific code into its own library, with no dependencies on anything else, and DebugInfoCodeView and DebugInfoPDB take dependencies on DebugInfoMsf. llvm-svn: 276458
* [pdb] Round trip the PDB stream between YAML and binary PDB.Zachary Turner2016-07-061-0/+2
| | | | | | This gets writing of the PDB stream working. llvm-svn: 274647
* [pdb] Handle stream index errors better.Zachary Turner2016-06-081-5/+4
| | | | | | | Reviewed By: ruiu Differential Revision: http://reviews.llvm.org/D21128 llvm-svn: 272172
* [pdb] Use MappedBlockStream to parse the PDB directory.Zachary Turner2016-06-071-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to efficiently write PDBs, we need to be able to make a StreamWriter class similar to a StreamReader, which can transparently deal with writing to discontiguous streams, and we need to use this for all writing, similar to how we use StreamReader for all reading. Most discontiguous streams are the typical numbered streams that appear in a PDB file and are described by the directory, but the exception to this, that until now has been parsed by hand, is the directory itself. MappedBlockStream works by querying the directory to find out which blocks a stream occupies and various other things, so naturally the same logic could not possibly work to describe the blocks that the directory itself resided on. To solve this, I've introduced an abstraction IPDBStreamData, which allows the client to query for the list of blocks occupied by the stream, as well as the stream length. I provide two implementations of this: one which queries the directory (for indexed streams), and one which queries the super block (for the directory stream). This has the side benefit of vastly simplifying the code to parse the directory. Whereas before a mini state machine was rolled by hand, now we simply use FixedStreamArray to read out the stream sizes, then build a vector of FixedStreamArrays for the stream map, all in just a few lines of code. Reviewed By: ruiu Differential Revision: http://reviews.llvm.org/D21046 llvm-svn: 271982
* [pdb] Add unit tests for PDB MappedBlockStream and zero copyZachary Turner2016-05-311-0/+1
| | | | | | | Differential Revision: http://reviews.llvm.org/D20837 Reviewed By: ruiu llvm-svn: 271346
* [pdb] Finish conversion to zero copy pdb access.Zachary Turner2016-05-281-12/+5
| | | | | | | | | | | | | | This converts remaining uses of ByteStream, which was still left in the symbol stream and type stream, to using the new StreamInterface zero-copy classes. RecordIterator is finally deleted, so this is the only way left now. Additionally, more error checking is added when iterating the various streams. With this, the transition to zero copy pdb access is complete. llvm-svn: 271101
* [codeview,pdb] Try really hard to conserve memory when reading.Zachary Turner2016-05-271-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | 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 Turner2016-05-251-3/+2
| | | | | | | | | | 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, pdb] Dump symbol records in publics streamZachary Turner2016-05-241-49/+16
| | | | | | | Differential Revision: http://reviews.llvm.org/D20580 Reviewed By: ruiu llvm-svn: 270597
* Fix struct member names and simplify. NFC.Rui Ueyama2016-05-201-6/+4
| | | | llvm-svn: 270289
* pdbdump: print out symbol names referred by publics stream.Rui Ueyama2016-05-201-0/+85
DBI stream contains a stream number of the symbol record stream. Symbol record streams is an array of length-type-value members. Each member represents one symbol. Publics stream contains offsets to the symbol record stream. This patch is to print out all symbols that are referenced by the publics stream. Note that even with this patch, llvm-pdbdump cannot dump all the information in a publics stream since it contains more information than symbol names. I'll improve it in followup patches. Differential Revision: http://reviews.llvm.org/D20480 llvm-svn: 270262
OpenPOWER on IntegriCloud