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happen.
Change introduces error reporting policy for DWARFContextInMemory.
New callback provided by client is able to handle error on it's
side and return Halt or Continue.
That allows to either keep current behavior when parser prints all errors
but continues parsing object or implement something very different, like
stop parsing on a first error and report an error in a client style.
Differential revision: https://reviews.llvm.org/D34328
llvm-svn: 306512
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Some forms have sizes that depend on the DWARF version, DWARF format
(32/64-bit), or the size of an address. Collect these into a struct
to simplify passing them around. Require callers to provide one when
they query a form's size.
Differential Revision: http://reviews.llvm.org/D34570
llvm-svn: 306315
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There doesn't seem to be a compelling reason why this method should be const
other than it was possible with the DIA implementation. The native session
is going to act as a symbol factory and cache. This could be acheived with
mutable (and the existing const_cast), but it seems cleaner to accept that
this method affects the state of the session.
This change eliminates an existing const_cast.
llvm-svn: 306041
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Summary:
The main complexity in adding symbol records is that we need to
"relocate" all the type indices. Type indices do not have anything like
relocations, an opaque data structure describing where to find existing
type indices for fixups. The linker just has to "know" where the type
references are in the symbol records. I added an overload of
`discoverTypeIndices` that works on symbol records, and it seems to be
able to link the standard library.
Reviewers: zturner, ruiu
Subscribers: llvm-commits, hiraditya
Differential Revision: https://reviews.llvm.org/D34432
llvm-svn: 305933
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llvm-svn: 305753
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Suppose we had a type index offsets array with a boundary at type index
N. Then you request the name of the type with index N+1, and that name
requires the name of index N-1 (think a parameter list, for example). We
didn't handle this, and we would print something like (<unknown UDT>,
<unknown UDT>).
The fix for this is not entirely trivial, and speaks to a larger
problem. I think we need to kill TypeDatabase, or at the very least kill
TypeDatabaseVisitor. We need a thing that doesn't do any caching
whatsoever, just given a type index it can compute the type name "the
slow way". The reason for the bug is that we don't have anything like
that. Everything goes through the type database, and if we've visited a
record, then we're "done". It doesn't know how to do the expensive thing
of re-visiting dependent records if they've not yet been visited.
What I've done here is more or less copied the code (albeit greatly
simplified) from TypeDatabaseVisitor, but wrapped it in an interface
that just returns a std::string. The logic of caching the name is now in
LazyRandomTypeCollection. Eventually I'd like to move the record
database here as well and the visited record bitfield here as well, at
which point we can actually just delete TypeDatabase. I don't see any
reason for it if a "sequential" collection is just a special case of a
random access collection with an empty partial offsets array.
Differential Revision: https://reviews.llvm.org/D34297
llvm-svn: 305612
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braces to avoid ambiguous 'else'. NFC.
llvm-svn: 305506
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Instead use target_link_libraries directly. Thanks to
Juergen Ributzka for the suggestion, which fixes an issue
when llvm is configured with no targets.
llvm-svn: 305421
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Many times unit tests for different libraries would like to use
the same helper functions for checking common types of errors.
This patch adds a common library with helpers for testing things
in Support, and introduces helpers in here for integrating the
llvm::Error and llvm::Expected<T> classes with gtest and gmock.
Normally, we would just be able to write:
EXPECT_THAT(someFunction(), succeeded());
but due to some quirks in llvm::Error's move semantics, gmock
doesn't make this easy, so two macros EXPECT_THAT_ERROR() and
EXPECT_THAT_EXPECTED() are introduced to gloss over the difficulties.
Consider this an exception, and possibly only temporary as we
look for ways to improve this.
Differential Revision: https://reviews.llvm.org/D33059
llvm-svn: 305395
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This creates a new library called BinaryFormat that has all of
the headers from llvm/Support containing structure and layout
definitions for various types of binary formats like dwarf, coff,
elf, etc as well as the code for identifying a file from its
magic.
Differential Revision: https://reviews.llvm.org/D33843
llvm-svn: 304864
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clang-format (https://reviews.llvm.org/D33932) to keep primary headers
at the top and handle new utility headers like 'gmock' consistently with
other utility headers.
No other change was made. I did no manual edits, all of this is
clang-format.
This should allow other changes to have more clear and focused diffs,
and is especially motivated by moving some headers into more focused
libraries.
llvm-svn: 304786
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Previously MappedBlockStream owned its own BumpPtrAllocator that
it would allocate from when a read crossed a block boundary. This
way it could still return the user a contiguous buffer of the
requested size. However, It's not uncommon to open a stream, read
some stuff, close it, and then save the information for later.
After all, since the entire file is mapped into memory, the data
should always be available as long as the file is open.
Of course, the exception to this is when the data isn't *in* the
file, but rather in some buffer that we temporarily allocated to
present this contiguous view. And this buffer would get destroyed
as soon as the strema was closed.
The fix here is to force the user to specify the allocator, this
way it can provide an allocator that has whatever lifetime it
chooses.
Differential Revision: https://reviews.llvm.org/D33858
llvm-svn: 304623
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llvm-svn: 304184
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addition to Low/High PC"
With fix of uninitialized variable.
Original commit message:
This change is intended to use for LLD in D33183.
Problem we have in LLD when building .gdb_index is that we need to know section which address range belongs to.
Previously it was solved on LLD side by providing fake section addresses with use of llvm::LoadedObjectInfo
interface. We assigned file offsets as addressed. Then after obtaining ranges lists, for each range we had to find section ID's.
That not only was slow, but also complicated implementation and was the reason of incorrect behavior when
sections share the same offsets, like D33176 shows.
This patch makes DWARF parsers to return section index as well. That solves problem mentioned above.
Differential revision: https://reviews.llvm.org/D33184
llvm-svn: 304078
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in addition to Low/High PC"
Revert it again. Now another bot unhappy: http://lab.llvm.org:8011/builders/clang-s390x-linux/builds/8750
llvm-svn: 304011
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Low/High PC
This change is intended to use for LLD in D33183.
Problem we have in LLD when building .gdb_index is that we need to know section which address range belongs to.
Previously it was solved on LLD side by providing fake section addresses with use of llvm::LoadedObjectInfo
interface. We assigned file offsets as addressed. Then after obtaining ranges lists, for each range we had to find section ID's.
That not only was slow, but also complicated implementation and was the reason of incorrect behavior when
sections share the same offsets, like D33176 shows.
This patch makes DWARF parsers to return section index as well. That solves problem mentioned above.
Differential revision: https://reviews.llvm.org/D33184
llvm-svn: 304002
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addition to Low/High PC"
Broked BB again:
TEST 'LLVM :: DebugInfo/X86/dbg-value-regmask-clobber.ll' FAILED
...
LLVM ERROR: Section was outside of section table.
llvm-svn: 303984
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in addition to Low/High PC"
With fix of test compilation.
Initial commit message:
This change is intended to use for LLD in D33183.
Problem we have in LLD when building .gdb_index is that we need to know section
which address range belongs to.
Previously it was solved on LLD side by providing fake section addresses
with use of llvm::LoadedObjectInfo interface. We assigned file offsets as addressed.
Then after obtaining ranges lists, for each range we had to find section ID's.
That not only was slow, but also complicated implementation and was the reason
of incorrect behavior when
sections share the same offsets, like D33176 shows.
This patch makes DWARF parsers to return section index as well.
That solves problem mentioned above.
Differential revision: https://reviews.llvm.org/D33184
llvm-svn: 303983
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Merging two type streams is one of the most time consuming
parts of generating a PDB, and as such it needs to be as
fast as possible. The visitor abstractions used for interoperating
nicely with many different types of inputs and outputs have
been used widely and help greatly for testability and implementing
tools, but the abstractions build up and get in the way of
performance.
This patch removes all of the visitation stuff from the type
stream merger, essentially re-inventing the leaf / member switch
and loop, but at a very low level. This allows us many other
optimizations, such as not actually deserializing *any* records
(even member records which don't describe their own length), as
the operation of "figure out how long this record is" is somewhat
faster than "figure out how long this record *and* get all its
fields out". Furthermore, whereas before we had to deserialize,
re-write type indices, then re-serialize, now we don't have to
do any of those 3 steps. We just find out where the type indices
are and pull them directly out of the byte stream and re-write
them.
This is worth a 50-60% performance increase. On top of all other
optimizations that have been applied this week, I now get the
following numbers when linking lld.exe and lld.pdb
MSVC: 25.67s
Before This Patch: 18.59s
After This Patch: 8.92s
So this is a huge performance win.
Differential Revision: https://reviews.llvm.org/D33564
llvm-svn: 303935
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It was using the number of blocks of the entire PDB file as the number
of blocks of each stream that was created. This was only an issue in
the readLongestContiguousChunk function, which was never called prior.
This bug surfaced when I updated an algorithm to use this function and
the algorithm broke.
llvm-svn: 303916
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avoid ambiguous 'else' [-Wdangling-else].
llvm-svn: 303602
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This was originally reverted because it was a breaking a bunch
of bots and the breakage was not surfacing on Windows. After much
head-scratching this was ultimately traced back to a bug in the
lit test runner related to its pipe handling. Now that the bug
in lit is fixed, Windows correctly reports these test failures,
and as such I have finally (hopefully) fixed all of them in this
patch.
llvm-svn: 303446
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This is a squash of ~5 reverts of, well, pretty much everything
I did today. Something is seriously broken with lit on Windows
right now, and as a result assertions that fire in tests are
triggering failures. I've been breaking non-Windows bots all
day which has seriously confused me because all my tests have
been passing, and after running lit with -a to view the output
even on successful runs, I find out that the tool is crashing
and yet lit is still reporting it as a success!
At this point I don't even know where to start, so rather than
leave the tree broken for who knows how long, I will get this
back to green, and then once lit is fixed on Windows, hopefully
hopefully fix the remaining set of problems for real.
llvm-svn: 303409
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Right now we have multiple notions of things that represent collections of
types. Most commonly used are TypeDatabase, which is supposed to keep
mappings from TypeIndex to type name when reading a type stream, which
happens when reading PDBs. And also TypeTableBuilder, which is used to
build up a collection of types dynamically which we will later serialize
(i.e. when writing PDBs).
But often you just want to do some operation on a collection of types, and
you may want to do the same operation on any kind of collection. For
example, you might want to merge two TypeTableBuilders or you might want
to merge two type streams that you loaded from various files.
This dichotomy between reading and writing is responsible for a lot of the
existing code duplication and overlapping responsibilities in the existing
CodeView library classes. For example, after building up a
TypeTableBuilder with a bunch of type records, if we want to dump it we
have to re-invent a bunch of extra glue because our dumper takes a
TypeDatabase or a CVTypeArray, which are both incompatible with
TypeTableBuilder.
This patch introduces an abstract base class called TypeCollection which
is shared between the various type collection like things. Wherever we
previously stored a TypeDatabase& in some common class, we now store a
TypeCollection&.
The advantage of this is that all the details of how the collection are
implemented, such as lazy deserialization of partial type streams, is
completely transparent and you can just treat any collection of types the
same regardless of where it came from.
Differential Revision: https://reviews.llvm.org/D33293
llvm-svn: 303388
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There is often a lot of boilerplate code required to visit a type
record or type stream. The #1 use case is that you have a sequence
of bytes that represent one or more records, and you want to
deserialize each one, switch on it, and call a callback with the
deserialized record that the user can examine. Currently this
requires at least 6 lines of code:
codeview::TypeVisitorCallbackPipeline Pipeline;
Pipeline.addCallbackToPipeline(Deserializer);
Pipeline.addCallbackToPipeline(MyCallbacks);
codeview::CVTypeVisitor Visitor(Pipeline);
consumeError(Visitor.visitTypeRecord(Record));
With this patch, it becomes one line of code:
consumeError(codeview::visitTypeRecord(Record, MyCallbacks));
This is done by having the deserialization happen internally inside
of the visitTypeRecord function. Since this is occasionally not
desirable, the function provides a 3rd parameter that can be used
to change this behavior.
Hopefully this can significantly reduce the barrier to entry
to using the visitation infrastructure.
Differential Revision: https://reviews.llvm.org/D33245
llvm-svn: 303271
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llvm-svn: 302971
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This adds a visitor that is capable of accessing type
records randomly and caching intermediate results that it
learns about during partial linear scans. This yields
amortized O(1) access to a type stream even though type
streams cannot normally be indexed.
Differential Revision: https://reviews.llvm.org/D33009
llvm-svn: 302936
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llvm-svn: 302057
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llvm-readobj hand rolls some CodeView parsing code for string
tables, so this patch updates it to re-use some of the newly
introduced parsing code in LLVMDebugInfoCodeView.
Differential Revision: https://reviews.llvm.org/D32772
llvm-svn: 302052
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This was reverted due to a "missing" file, but in reality
what happened was that I renamed a file, and then due to
a merge conflict both the old file and the new file got
added to the repository. This led to an unused cpp file
being in the repo and not referenced by any CMakeLists.txt
but #including a .h file that wasn't in the repo. In an
even more unfortunate coincidence, CMake didn't report the
unused cpp file because it was in a subdirectory of the
folder with the CMakeLists.txt, and not in the same directory
as any CMakeLists.txt.
The presence of the unused file was then breaking certain
tools that determine file lists by globbing rather than
by what's specified in CMakeLists.txt
In any case, the fix is to just remove the unused file from
the patch set.
llvm-svn: 302042
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--verify"
Check to make sure no compile units have the same DW_AT_stmt_list values. Report a verification error if they do.
Differential Revision: https://reviews.llvm.org/D32771
llvm-svn: 302039
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The patch is failing to add StringTableStreamBuilder.h, but that isn't
even discovered because the corresponding StringTableStreamBuilder.cpp
isn't added to any CMakeLists.txt file and thus never built. I think
this patch is just incomplete.
llvm-svn: 302002
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Previously we had knowledge of how to serialize and deserialize
a string table inside of DebugInfo/PDB, but the string table
that it serializes contains a piece that is actually considered
CodeView and can appear outside of a PDB. We already have logic
in llvm-readobj and MCCodeView to read and write this format,
so it doesn't make sense to duplicate the logic in DebugInfoPDB
as well.
This patch makes codeview::StringTable (for writing) and
codeview::StringTableRef (for reading), updates DebugInfoPDB
to use these classes for its own writing, and updates llvm-readobj
to additionally use StringTableRef for reading.
It's a bit more difficult to get MCCodeView to use this for
writing, but it's a logical next step.
llvm-svn: 301986
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This patch verifies the .debug_line:
- verify all addresses in a line table sequence have ascending addresses
- verify that all line table file indexes are valid
Unit tests added for both cases.
Differential Revision: https://reviews.llvm.org/D32765
llvm-svn: 301984
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LTO and other fancy linking previously led to DWARF that contained invalid references. We already validate that CU relative references fall into the CU, and the DW_FORM_ref_addr references fall inside the .debug_info section, but we didn't validate that the references pointed to correct DIE offsets. This new verification will ensure that all references refer to actual DIEs and not an offset in between.
This caught a bug in DWARFUnit::getDIEForOffset() where if you gave it any offset, it would match the DIE that mathes the offset _or_ the next DIE. This has been fixed.
Differential Revision: https://reviews.llvm.org/D32722
llvm-svn: 301971
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With the forthcoming codeview::StringTable which a pdb::StringTable
would hold an instance of as one member, this ambiguity becomes
confusing. Rename to PDBStringTable to avoid this.
llvm-svn: 301948
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lldb-dwarfdump gets a new "--verify" option that will verify a single file's DWARF debug info and will print out any errors that it finds. It will return an non-zero exit status if verification fails, and a zero exit status if verification succeeds. Adding the --quiet option will suppress any output the STDOUT or STDERR.
The first part of the verify does the following:
- verifies that all CU relative references (DW_FORM_ref1, DW_FORM_ref2, DW_FORM_ref4, DW_FORM_ref8, DW_FORM_ref_udata) have valid CU offsets
- verifies that all DW_FORM_ref_addr references have valid .debug_info offsets
- verifies that all DW_AT_ranges attributes have valid .debug_ranges offsets
- verifies that all DW_AT_stmt_list attributes have valid .debug_line offsets
- verifies that all DW_FORM_strp attributes have valid .debug_str offsets
Unit tests were added for each of the above cases.
Differential Revision: https://reviews.llvm.org/D32707
llvm-svn: 301844
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protected dtor in the base, final derived classes with public non-virtual dtors)
These objects are never polymorphically owned/destroyed, so the virtual
dtor was unnecessary.
llvm-svn: 301068
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Associate the version-when-defined with definitions of standard DWARF
constants. Identify the "vendor" for DWARF extensions.
Use this information to verify FORMs in .debug_abbrev are defined as
of the DWARF version specified in the associated unit.
Removed two tests that had specified DWARF v1 (which essentially does
not exist).
Differential Revision: http://reviews.llvm.org/D30785
llvm-svn: 300875
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Previously the dumping of class definitions was very primitive,
and it made it hard to do more than the most trivial of output
formats when dumping. As such, we would only dump one line for
each field, and then dump non-layout items like nested types
and enums.
With this patch, we do a complete analysis of the object
hierarchy including aggregate types, bases, virtual bases,
vftable analysis, etc. The only immediately visible effects
of this are that a) we can now dump a line for the vfptr where
before we would treat that as padding, and b) we now don't
treat virtual bases that come at the end of a class as padding
since we have a more detailed analysis of the class's storage
usage.
In subsequent patches, we should be able to use this analysis
to display a complete graphical view of a class's layout including
recursing arbitrarily deep into an object's base class / aggregate
member hierarchy.
llvm-svn: 300133
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DW_AT_specification in a single chain
In a recent refactoring (r291959) this regressed to only following one
or the other, not both, in a single chain.
llvm-svn: 297676
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David Blaikie pointed out that the `setForceChildren` API is no longer needed and should be removed from the DWARF Generator APIs.
Also the DWARFDebugInfoTest file had some copy pasted comments that are not relevant. I've removed them.
llvm-svn: 297056
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In the DWARF 4 Spec section 7.2.2, data in many DWARF sections, and some DWARF structures start with "Initial Length Values", which are a 32-bit length, and an optional 64-bit length if the 32 bit value == UINT32_MAX.
This patch abstracts the Initial Length type in YAML, and extends its use to all the DWARF structures that are supported in the DWARFYAML code that have Initial Length values.
llvm-svn: 296911
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After several smaller patches to get most of the core improvements
finished up, this patch is a straight move and header fixup of
the source.
Differential Revision: https://reviews.llvm.org/D30266
llvm-svn: 296810
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values
Take DW_FORM_implicit_const attribute value into account when profiling
DIEAbbrevData.
Currently if we have two similar types with implicit_const attributes and
different values we end up with only one abbrev in .debug_abbrev section.
For example consider two structures: S1 with implicit_const attribute ATTR
and value VAL1 and S2 with implicit_const ATTR and value VAL2.
The .debug_abbrev section will contain only 1 related record:
[N] DW_TAG_structure_type DW_CHILDREN_yes
DW_AT_ATTR DW_FORM_implicit_const VAL1
// ....
This is incorrect as struct S2 (with VAL2) will use abbrev record with VAL1.
With this patch we will have two different abbreviations here:
[N] DW_TAG_structure_type DW_CHILDREN_yes
DW_AT_ATTR DW_FORM_implicit_const VAL1
// ....
[M] DW_TAG_structure_type DW_CHILDREN_yes
DW_AT_ATTR DW_FORM_implicit_const VAL2
// ....
llvm-svn: 296691
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This was failing because I was using memcmp to compare two
objects that included padding bytes, which were uninitialized.
llvm-svn: 296681
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llvm-svn: 296672
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This was due to the test stream choosing an arbitrary partition
index for introducing the discontinuity rather than choosing
an index that would be correctly aligned for the type of data.
Also added an assertion into FixedStreamArray so that this will
be caught on all bots in the future, and not just the UBSan bot.
llvm-svn: 296661
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This re-adds all the binary stream tests. This was reverted due
to some misaligned reads. For now the offending test is
disabled while I investigate.
llvm-svn: 296643
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It breaks the ToT UBSan bots:
/Users/vk/Desktop/llvm/include/llvm/DebugInfo/MSF/BinaryStreamArray.h:246:12: runtime error: reference binding to misaligned address 0x7f925540939a for type 'const int', which requires 4 byte alignment
0x7f925540939a: note: pointer points here
05 00 00 00 01 00 00 00 02 00 00 00 03 00 00 00 00 00 00 00 00 00 00 00 00 00 70 98 50 06 01 00
^
0 DebugInfoPDBTests 0x0000000106263cbd llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 45
1 DebugInfoPDBTests 0x00000001062628ff llvm::sys::RunSignalHandlers() + 159
2 DebugInfoPDBTests 0x0000000106264593 SignalHandler(int) + 179
3 libsystem_platform.dylib 0x0000000107bb3fba _sigtramp + 26
4 libsystem_pthread.dylib 0x0000000107bd82c8 _pthread_keys + 9720
5 libsystem_c.dylib 0x0000000107947f83 abort + 127
6 libclang_rt.ubsan_osx_dynamic.dylib 0x0000000106bb5fc2 __sanitizer::Abort() + 66
7 DebugInfoPDBTests 0x000000010613f880 llvm::FixedStreamArrayIterator<int>::operator+=(long) + 0
8 DebugInfoPDBTests 0x000000010613f615 llvm::FixedStreamArrayIterator<int>::operator*() const + 37
9 DebugInfoPDBTests 0x000000010613f3cb std::__1::enable_if<__is_forward_iterator<llvm::FixedStreamArrayIterator<int> >::value, void>::type std::__1::vector<int, std::__1::allocator<int> >::__construct_at_end<llvm::FixedStreamArrayIterator<int> >(llvm::FixedStreamArrayIterator<int>, llvm::FixedStreamArrayIterator<int>, unsigned long) + 251
10 DebugInfoPDBTests 0x000000010613f292 std::__1::vector<int, std::__1::allocator<int> >::vector<llvm::FixedStreamArrayIterator<int> >(llvm::FixedStreamArrayIterator<int>, std::__1::enable_if<(__is_forward_iterator<llvm::FixedStreamArrayIterator<int> >::value) && (is_constructible<int, std::__1::iterator_traits<llvm::FixedStreamArrayIterator<int> >::reference>::value), llvm::FixedStreamArrayIterator<int> >::type) + 226
11 DebugInfoPDBTests 0x000000010613ddb7 std::__1::vector<int, std::__1::allocator<int> >::vector<llvm::FixedStreamArrayIterator<int> >(llvm::FixedStreamArrayIterator<int>, std::__1::enable_if<(__is_forward_iterator<llvm::FixedStreamArrayIterator<int> >::value) && (is_constructible<int, std::__1::iterator_traits<llvm::FixedStreamArrayIterator<int> >::reference>::value), llvm::FixedStreamArrayIterator<int> >::type) + 87
12 DebugInfoPDBTests 0x000000010613d4af (anonymous namespace)::BinaryStreamTest_StreamReaderIntegerArray_Test::TestBody() + 1279
13 DebugInfoPDBTests 0x00000001062780f3 testing::Test::Run() + 179
14 DebugInfoPDBTests 0x0000000106279594 testing::TestInfo::Run() + 308
15 DebugInfoPDBTests 0x000000010627a6a3 testing::TestCase::Run() + 307
16 DebugInfoPDBTests 0x00000001062849d4 testing::internal::UnitTestImpl::RunAllTests() + 756
17 DebugInfoPDBTests 0x0000000106284558 testing::UnitTest::Run() + 152
18 DebugInfoPDBTests 0x0000000106266fa5 main + 117
19 libdyld.dylib 0x00000001078506a5 start + 1
zsh: abort ./unittests/DebugInfo/PDB/DebugInfoPDBTests
llvm-svn: 296641
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