This patch begins the process of migrating the "minidump" plugin to the
minidump parser in llvm. The llvm parser is not fully finished yet, but
even now, a lot of things can be switched over. The gradual migration
process will allow us to easier detect if things break than doing a big
one-step migration. Doing it early will allow us to make sure that the
llvm parser fits the use case that we need in lldb.
In this patch I start with the various minidump constants, which have
their llvm equivalent. It doesn't contain any functional changes. The
diff just reflects the different naming of things in llvm.
llvm-svn: 356898
The changes were reverted due to ubsan errors (unaligned accesses). Here
I fix those errors by first copying the data into aligned storage.
Besides fixing alignment issues, this also fixes reading of minidump
strings on big-endian systems.
llvm-svn: 356896
This fixes the flakiness of the GDB remote reproducer during replay. It
was caused by a combination sending one ACK to many from the replay
server and the code that "flushes" any queued GDB remote packets in
GDBRemoteCommunicationClient::HandshakeWithServer.
The spurious ACK was the result of combining both implicit and explicit
handling of ACKs in the replay server. The handshake consists of an ACK
followed by an QStartNoAckMode. As long as we haven't seen any
QStartNoAckMode, we were sending implicit acknowledgments. So the first
ACK got acknowledged twice, once implicitly, and once as part of the
replay.
The reason we didn't notice this was the code in HandshakeWithServer
that "waits for any responses that might have been queued up in the
remote GDB server and flush them all". A 10ms timeout is used to move on
when no packets are left. If the second ACK didn't make it within those
10ms, all packets were offset by one.
llvm-svn: 356825
Summary:
For the only version of Python actually supported on Darwin.
<rdar://problem/40961425>
Reviewers: jingham, friss, JDevlieghere, aprantl, jasonmolenda
Subscribers: jdoerfert, llvm-commits, lldb-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D59719
llvm-svn: 356816
This reverts the following two commits:
Revert "Extend r356573 (minidump UUID handling) to cover elf build-ids too"
Revert "Fix UUID decoding from minidump files"
Greg's original commit broke the sanitizer bot which has been red for
several days now.
http://green.lab.llvm.org/green/view/LLDB/job/lldb-sanitized/
llvm-svn: 356806
This reverts commit r356682 because it breaks the DWO flavours of some
tests:
lldb-Suite :: lang/c/const_variables/TestConstVariables.py
lldb-Suite :: lang/c/local_variables/TestLocalVariables.py
lldb-Suite :: lang/c/vla/TestVLA.py
llvm-svn: 356773
Breakpad (but not crashpad) will insert an empty (all-zero) build-id
record for modules which do not have a build-id. This tells lldb to
treat such records as empty/invalid uuids.
llvm-svn: 356751
This is mostly mechanical, and just moves the remaining non-DWO
related sections over to DWARFContext.
Differential Revision: https://reviews.llvm.org/D59611
llvm-svn: 356682
When the output of map is not used, using a list comprehension or an explicit
call to list looks awkward.
Differential Revision: https://reviews.llvm.org/D59587
llvm-svn: 356672
On Linux, a QEnvironment packet is sent for every environment variable.
This breaks replay when the number of environment variables is different
then during capture. The solution is to always reply with OK.
llvm-svn: 356643
Make debugging of the GDB remote packet aspect of reproducers easier by
logging both requests and replies. This enables some sanity checking
during replay.
llvm-svn: 356638
LLVM's DWARF parsing library has a class called DWARFContext which holds
all of the various DWARF data sections and lots of other information.
LLDB's on the other hand stores all of this directly in SymbolFileDWARF
/ SymbolFileDWARFDwo and passes this interface around through the
parsing library. Obviously this is incompatible with a world where the
low level interface does not depend on the high level interface, so we
need to move towards a model similar to LLVM's - i.e. all of the context
needed for low level parsing should be in a single class, and that class
gets passed around.
This patch is a small incremental step towards achieving this. The
interface and internals deviate from LLVM's for technical reasons, but
the high level idea is the same. The goal is, eventually, to remove all
occurrences of SymbolFileDWARF from the low level parsing code.
For now I've chosen a very simple section - the .debug_aranges section
to move into DWARFContext while leaving everything else unchanged. In
the short term this is a bit confusing because now the information you
need might come from either of 2 different locations. But it's a huge
refactor to do this all at once and runs a much higher risk of breaking
things. So I think it would be wise to do this in very small pieces.
TL;DR - No functional change
Differential Revision: https://reviews.llvm.org/D59562
llvm-svn: 356612
Summary:
`ASTImporter::Imported` currently returns a Decl, but that return value is not used by the ASTImporter (or anywhere else)
nor is it documented.
Reviewers: balazske, martong, a.sidorin, shafik
Reviewed By: balazske, martong
Subscribers: rnkovacs, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D59595
llvm-svn: 356592
This patch fixes:
UUIDs now don't include the age field from a PDB70 when the age is zero. Prior to this they would incorrectly contain the zero age which stopped us from being able to match up the UUID with real files.
UUIDs for Apple targets get the first 32 bit value and next two 16 bit values swapped. Breakpad incorrectly swaps these values when it creates darwin minidump files, so this must be undone so we can match up symbol files with the minidump modules.
UUIDs that are all zeroes are treated as invalid UUIDs. Breakpad will always save out a UUID, even if one wasn't available. This caused all files that have UUID values of zero to be uniqued to the first module that had a zero UUID. We now don't fill in the UUID if it is all zeroes.
Added tests for PDB70 and ELF build ID based CvRecords.
Differential Revision: https://reviews.llvm.org/D59433
llvm-svn: 356573
All of this is code that is unreferenced. Removing as much of
this as possible makes it more easy to determine what functionality
is missing and/or shared between LLVM and LLDB's DWARF interfaces.
llvm-svn: 356509
Most of these are Dump functions that are never called, but there
is one instance of entire unused classes (DWARFDebugMacinfo and
DWARFDebugMacinfoEntry) which are also unreferenced in the codebase).
Differential Revision: https://reviews.llvm.org/D59276
llvm-svn: 356490
Move SBRegistry method registrations from SBReproducer.cpp into files
declaring the individual APIs, in order to reduce the memory consumption
during build and improve maintainability. The current humongous
SBRegistry constructor exhausts all memory on a NetBSD system with 4G
RAM + 4G swap, therefore making it impossible to build LLDB.
Differential Revision: https://reviews.llvm.org/D59427
llvm-svn: 356481
These log statements have questionable value, and hinder the effort
of separating the high and low level DWARF parsing interfaces inside
of LLDB. Removing them for now, and if/when we need such log statements
again in the future, we can add them back (if possible) or introduce a
mechanism for logging from the low-level interface in such a way that it
isn't coupled to the high level interface.
Differential Revision: https://reviews.llvm.org/D59498
llvm-svn: 356469
This is a new warning which started appearing as of gcc-8. The Opcode
class has a non-trivial constructor, so the idea of the warning is that
code should use that to initialize the object instead of using memset
(which can perturb class invariants set up by the constructor). In this
case, the Opcode default constructor was already clearing the object's
fields so we can just drop the memset call.
While I'm touching the EmulateInstruction constructor, I also move the
initialization of other members into the class declaration.
llvm-svn: 356459
Summary:
This is a preparatory step to enable adding of unwind plans by symbol
file plugins.
Although at the surface it seems that currently symbol files have
nothing to do with unwinding, this isn't entirely correct even now. The
mere act of adding a symbol file can have the effect of making more
sections (typically .debug_frame) available to the unwinding machinery,
so that it can have more unwind strategies to choose from.
Up until now, we've had a bug, which went largely unnoticed, where
unwind info in the manually added symbols files (target symbols add) was
being ignored during unwinding. Reinitializing the UnwindTable fixes
that bug too.
Reviewers: clayborg, jasonmolenda, alexshap
Subscribers: jdoerfert, lldb-commits
Differential Revision: https://reviews.llvm.org/D58347
llvm-svn: 356361
This continues the work of introducing Error and Expected into
the DWARF parsing interfaces, this time for the DWARFCompileUnit
and DWARFDebugAranges classes.
Differential Revision: https://reviews.llvm.org/D59381
llvm-svn: 356278
Serge Guelton