This patch hides the .debug_str offset and DIE reference offsets into
the CU when llvm-dwarfdump is invoked with -brief.
Differential Revision: https://reviews.llvm.org/D36835
llvm-svn: 311201
When dumping, we were treating the S_INLINESITESYM as referring
to a type record, when it actually refers to an id record. We
had this correct in TypeIndexDiscovery, so our merging algorithm
should be fine, but we had it wrong in the dumper, which means it
would appear to work most of the time, unless the index was out
of bounds in the type stream, when it would fail. Fixed this, and
audited a few other cases to make them match the behavior in
TypeIndexDiscovery.
Also, I've now observed a new symbol record with kind 0x1168 which
I have no clue what it is, so to avoid crashing we have to just
print "Unknown Symbol Kind".
llvm-svn: 311117
As was requested in D36313 thread,
with this patch section names and uniqueness calculated once,
and not every time when a range is dumped.
Differential revision: https://reviews.llvm.org/D36740
llvm-svn: 310923
Teaches llvm-dwarfdump to print section index and name of range
when it dumps .debug_info.
Differential revision: https://reviews.llvm.org/D36313
llvm-svn: 310915
Previously we were writing an empty globals stream. Windows
tools interpret this as "private symbols are not present in
this PDB", even when they are, so we need to fix this. Regardless,
without it we don't have information about global variables, so
we need to fix it anyway. This patch does that.
With this patch, the "lm" command in WinDbg correctly reports
that we have private symbols available, but the "dv" command
still refuses to display local variables.
Differential Revision: https://reviews.llvm.org/D36535
llvm-svn: 310743
In the refactor to merge the publics and globals stream, a bug
was introduced that wrote the wrong value for one of the fields
of the PublicsStreamHeader. This caused debugging in WinDbg
to break.
We had no way of dumping any of these fields, so in addition to
fixing the bug I've added dumping support for them along with a
test that verifies the correct value is written.
llvm-svn: 310439
The publics stream and globals stream are very similar. They both
contain a list of hash buckets that refer into a single shared stream,
the symbol record stream. Because of the need for each builder to manage
both an independent hash stream as well as a single shared record
stream, making the two builders be independent entities is not the right
design. This patch merges them into a single class, of which only a
single instance is needed to create all 3 streams. PublicsStreamBuilder
and GlobalsStreamBuilder are now merged into the single GSIStreamBuilder
class, which writes all 3 streams at once.
Note that this patch does not contain any functionality change. So we're
still not yet writing any records to the globals stream. All we're doing
is making it so that when we do start writing records to the globals,
this refactor won't have to be part of that patch.
Differential Revision: https://reviews.llvm.org/D36489
llvm-svn: 310438
The compiler outputs PROC32_ID symbols into the object files
for functions, and these symbols have an embedded type index
which, when copied to the PDB, refer to the IPI stream. However,
the symbols themselves are also converted into regular symbols
(e.g. S_GPROC32_ID -> S_GPROC32), and type indices in the regular
symbol records refer to the TPI stream. So this patch applies
two fixes to function records.
1. It converts ID symbols to the proper non-ID record type.
2. After remapping the type index from the object file's index
space to the PDB file/IPI stream's index space, it then
remaps that index to the TPI stream's index space by.
Besides functions, during the remapping process we were also
discarding symbol record types which we did not recognize.
In particular, we were discarding S_BPREL32 records, which is
what MSVC uses to describe local variables on the stack. So
this patch fixes that as well by copying them to the PDB.
Differential Revision: https://reviews.llvm.org/D36426
llvm-svn: 310394
These lead to tests failing spuriously as the values after being rendered to a
string were incorrect.
Reviewers: clayborg
Differential Revision: https://reviews.llvm.org/D36319
llvm-svn: 310262
This extends the native reader to enable llvm-pdbutil to list the enums in a
PDB and it includes a simple test. It does not yet list the values in the
enumerations, which requires an actual implementation of
NativeEnumSymbol::FindChildren.
To exercise this code, use a command like:
llvm-pdbutil pretty -native -enums foo.pdb
Differential Revision: https://reviews.llvm.org/D35738
llvm-svn: 310144
Summary:
PDB section contributions are supposed to use output section indices and
offsets, not input section indices and offsets.
This allows the debugger to look up the index of the module that it
should look up in the modules stream for symbol information. With this
change, windbg can now find line tables, but it still cannot print local
variables.
Fixes PR34048
Reviewers: zturner
Subscribers: hiraditya, ruiu, llvm-commits
Differential Revision: https://reviews.llvm.org/D36285
llvm-svn: 309987
The PDB reserves certain blocks for the FPM that describe which
blocks in the file are allocated and which are free. We weren't
filling that out at all, and in some cases we were even stomping
it with incorrect data. This patch writes a correct FPM.
Differential Revision: https://reviews.llvm.org/D36235
llvm-svn: 309896
Recently problems have been discovered in the way we write the FPM
(free page map). In order to fix this, we first need to establish
a baseline about what a correct FPM looks like using an MSVC
generated PDB, so that we can then make our own generated PDBs
match. And in order to do this, the dumper needs a mode where it
can dump an FPM so that we can write tests for it.
This patch adds a command to dump the FPM, as well as a test against
a known-good PDB.
llvm-svn: 309894
Followup to r309570, fixing it slightly differently (ranges_base and
addr_base should never be read from a DWO file - so there shouldn't be
any issue with 'overriding' the values - conditionalize the code and
assert that the values aren't being overriden).
llvm-svn: 309879
We don't write any actual symbols to this stream yet, but for
now we just create the stream and hook it up to the appropriate
places and give it a valid header.
Differential Revision: https://reviews.llvm.org/D35290
llvm-svn: 309608
DIEs are lazily deserialized so it's possible that the DWO CU is created
before the DIE is parsed. DWO shares .debug_addr and .debug_ranges with the
object file so overwriting the offset with 0 will make the CU unusable.
No test case because I couldn't get clang to emit a non-zero range base.
llvm-svn: 309570
I was a bit lazy when I first implemented this & skipped the index
lookup - obviously for large files this becomes pretty crucial, so here
we go, do the index lookup. Speeds up large DWP symbolizing by... lots.
(20m -> 20s, actually, maybe more in a release build (that was a release
build without index lookup, compared to a debug/non-release build with
the index usage))
llvm-svn: 309507
If you've archived the DWP file somewhere it's probably useful to be
able to just tell llvm-symbolizer where it is when you're symbolizing
stack traces from the binary.
This only provides a mechanism for specifying a single DWP file, good if
you're symbolizing a program with a single DWP file, but it's likely if
the program is dynamically linked that you might have a DWP for each
dynamic library - in which case this feature won't help (at least as
it's surfaced in llvm-symbolizer for now) - in theory it could be
extended to specify a collection of DWP files that could all be
consulted for split CU hash resolution.
llvm-svn: 309498
With ASan, we would write about 512 bytes of malloc fill value to the
PDB, with some random bits ORed in here and there. Dumping the PDB would
always fail reliably.
llvm-svn: 309331
Summary:
MSVC link.exe records all external symbol names in the publics stream.
It provides similar functionality to an ELF .symtab.
Reviewers: zturner, ruiu
Subscribers: hiraditya, llvm-commits
Differential Revision: https://reviews.llvm.org/D35871
llvm-svn: 309303
The PDB "symbol stream" actually contains symbol records for the publics
and the globals stream. The globals and publics streams are essentially
hash tables that point into a single stream of records. In order to
match cvdump's behavior, we need to only dump symbol records referenced
from the hash table. This patch implements that, and then implements
global stream dumping, since it's just a subset of public stream
dumping.
Now we shouldn't see S_PROCREF or S_GDATA32 records when dumping
publics, and instead we should see those record in the globals stream.
llvm-svn: 309066
Mostly just to silence a warning about an unhandled case. There don't seem to
be any tests for this operator (at least that I could find).
llvm-svn: 308901
This includes the hash table, the address map, and the thunk table and
section offset table. The last two are only used for incremental
linking, which LLD doesn't support, so they are less interesting. The
hash table is particularly important to get right, since this is the one
of the streams that debuggers use to translate addresses to symbols.
llvm-svn: 308764
SUMMARY
This patch adds a verification check on the abbreviation declarations in the .debug_abbrev section.
The check makes sure that no abbreviation declaration has more than one attributes with the same name.
Differential Revision: https://reviews.llvm.org/D35643
llvm-svn: 308579
This changes DwarfContext to delegate to DwarfObject instead of having
pure virtual methods.
With this DwarfContextInMemory is replaced with an implementation of
DwarfObject that is local to a .cpp file.
llvm-svn: 308543
Summary:
This patch modifies the handleDebugInfo() function so that we verify the contents of each unit
in the .debug_info section only if its header has been successfully verified.
This change will allow for more/different verification checks depending on the type of the unit since from
dwarf5, the .debug_info section may consist of different types of units.
Subscribers: aprantl
Differential Revision: https://reviews.llvm.org/D35521
llvm-svn: 308245
Summary:
This removes the CVTypeVisitor updater and verifier classes. They were
made dead by the minimal type dumping refactoring. Replace them with a
single function that takes a type record and produces a hash. Call this
from the minimal type dumper and compare the hash.
I also noticed that the microsoft-pdb reference repository uses a basic
CRC32 for records that aren't special. We already have an implementation
of that CRC ready to use, because it's used in COFF for ICF.
I'll make LLD call this hashing utility in a follow-up change. We might
also consider using this same hash in type stream merging, so that we
don't have to hash our records twice.
Reviewers: inglorion, ruiu
Subscribers: llvm-commits, hiraditya
Differential Revision: https://reviews.llvm.org/D35515
llvm-svn: 308240
Summary:
We were treating the GUIDs in TypeServer2Record as strings, and the
non-ASCII bytes in the GUID would not round-trip through YAML.
We already had the PDB_UniqueId type portably represent a Windows GUID,
but we need to hoist that up to the DebugInfo/CodeView library so that
we can use it in the TypeServer2Record as well as in PDB parsing code.
Reviewers: inglorion, amccarth
Subscribers: llvm-commits, hiraditya
Differential Revision: https://reviews.llvm.org/D35495
llvm-svn: 308234
Jonas Devlieghere