For some reason I had convinced myself that functions returning by
pointer or reference do not require recording their result. However,
after further considering I don't see how that could work, at least not
with the current implementation. Interestingly enough, the reproducer
instrumentation already (mostly) accounts for this, though the
lldb-instr tool did not.
This patch adds the missing macros and updates the lldb-instr tool.
Differential revision: https://reviews.llvm.org/D60178
llvm-svn: 357639
Allow partial UUID matching in Minidump core file plug-in
Breakpad had bugs in earlier versions where it would take a 20 byte ELF build ID and put it into the minidump file as a 16 byte PDB70 UUID with an age of zero. This would make it impossible to do postmortem debugging with one of these older minidump files.
This fix allows partial matching of UUIDs. To do this we first try and match with the full UUID value, and then fall back to removing the original directory path from the module specification and we remove the UUID requirement, and then manually do the matching ourselves. This allows scripts to find symbols files using a symbol server, place them all in a directory, use the "setting set target.exec-search-paths" setting to specify the directory, and then load the core file. The Target::GetSharedModule() can then find the correct file without doing any other matching and load it.
Tests were added to cover a partial UUID match where the breakpad file has a 16 byte UUID and the actual file on disk has a 20 byte UUID, both where the first 16 bytes match, and don't match.
Differential Revision: https://reviews.llvm.org/D60001
llvm-svn: 357603
See discussion in https://reviews.llvm.org/D60001.
Revert Clean up windows build bot.
This reverts r357504 (git commit 380c2420ec)
Revert Fix buildbot where paths were not matching up.
This reverts r357491 (git commit 5050586860)
Revert Allow partial UUID matching in Minidump core file plug-in
This reverts r357482 (git commit 838bba9c34)
llvm-svn: 357534
A recent patch to LLD started emitting information about import modules.
These are represented as compile units in the PDB, but with no
additional debug info. This was confusing the native pdb reader, who
expected that the debug info stream be present.
This should fix failing tests on the Windows bots.
llvm-svn: 357513
Breakpad had bugs in earlier versions where it would take a 20 byte ELF build ID and put it into the minidump file as a 16 byte PDB70 UUID with an age of zero. This would make it impossible to do postmortem debugging with one of these older minidump files.
This fix allows partial matching of UUIDs. To do this we first try and match with the full UUID value, and then fall back to removing the original directory path from the module specification and we remove the UUID requirement, and then manually do the matching ourselves. This allows scripts to find symbols files using a symbol server, place them all in a directory, use the "setting set target.exec-search-paths" setting to specify the directory, and then load the core file. The Target::GetSharedModule() can then find the correct file without doing any other matching and load it.
Tests were added to cover a partial UUID match where the breakpad file has a 16 byte UUID and the actual file on disk has a 20 byte UUID, both where the first 16 bytes match, and don't match.
Differential Revision: https://reviews.llvm.org/D60001
llvm-svn: 357482
Summary:
modify-python-lldb.py had code to insert python equality operators to
some classes. Some of those classes already had c++ equality operators,
and some didn't.
This makes the situation more consistent, by removing all equality
handilng from modify-python-lldb. Instead, I add c++ operators to
classes where they were missing, and expose them in the swig interface
files so that they are available to python too.
The only tricky case was the SBAddress class, which had an operator==
defined as a free function, which is not handled by swig. This function
cannot be removed without breaking ABI, and we cannot add an extra
operator== member, as that would make equality comparisons ambiguous.
For this class, I define a python __eq__ function by hand and have it
delegate to the operator!=, which I have defined as a member function.
This isn't fully NFC, as the semantics of some equality functions in
python changes slightly, but I believe it changes for the better (e.g.,
previously SBBreakpoint.__eq__ would consider two breakpoints with the
same ID as equal, even if they belonged to different targets; now they
are only equal if they belong to the same target).
Reviewers: jingham, clayborg, zturner
Subscribers: jdoerfert, JDevlieghere, lldb-commits
Differential Revision: https://reviews.llvm.org/D59819
llvm-svn: 357463
Summary:
This refactors moves the register name->number resolution out of the
FPOProgramNodeRegisterRef class. Instead I create a special
FPOProgramNodeSymbol class, which holds unresolved symbols, and move the
resolution into the ResolveRegisterRefs visitor.
The background here is that I'd like to use this code for Breakpad
unwind info, which uses similar syntax to describe unwind info. For
example, a simple breakpad unwind program might look like:
.cfa: $esp 8 + $ebp: .cfa 8 - ^
To be able to do this, I need to be able to customize register
resolving, as that is presently hardcoded to use codeview register
names, but breakpad supports a lot more architectures with different
register names. Moving the resolution into a separate class will allow
each user to use a different resolution logic.
Reviewers: aleksandr.urakov, zturner, amccarth
Subscribers: jdoerfert, lldb-commits
Differential Revision: https://reviews.llvm.org/D60068
llvm-svn: 357455
I found the code of Process::WriteMemory particularly hard to follow
when reviewing Ismail's change in D60022. This simplifies the code and
hopefully prevents similar oversights in the future.
Differential revision: https://reviews.llvm.org/D60092
llvm-svn: 357428
Summary:
In case of a breakpoint site overlapping with the destination address,
the WriteMemory method reported an incorrect memory size.
Instead of returning the right amount of bytes written, it falls through
the scope and returned 0.
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
Reviewers: jasonmolenda, friss, jingham
Subscribers: JDevlieghere, davide, lldb-commits, #lldb
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D60022
llvm-svn: 357420
Include support for NetBSD core dumps from evbarm/aarch64 system,
and matching test cases for them.
Based on earlier work by Kamil Rytarowski.
Differential Revision: https://reviews.llvm.org/D60034
llvm-svn: 357399
Summary:
We're using ptrace(PTRACE_SETREGSET, NT_X86_XSTATE) to write all non-gpt
registers on x86 linux. Unfortunately, this method has a quirk, where
the kernel rejects all attempts to write to this area if one supplies a
buffer which is smaller than the area size (even though the kernel will
happily accept partial reads from it).
This means that if the CPU supports some new registers/extensions that
we don't know about (in my case it was the PKRU extension), we will fail
to write *any* non-gpr registers, even those that we know about.
Since this is a situation that's likely to appear again and again, I add
code to NativeRegisterContextLinux_x86_64 to detect the runtime size of
the area, and allocate an appropriate buffer. This does not mean that we
will start automatically supporting all new extensions, but it does mean
that the new extensions will not prevent the old ones from working.
This fixes tests attempting to write to non-gpr registers on new intel
processors (cca Kaby Lake Refresh).
Reviewers: jankratochvil, davezarzycki
Subscribers: lldb-commits
Differential Revision: https://reviews.llvm.org/D59991
llvm-svn: 357376
This patch limits the scope of the python header to the implementation
of the python script interpreter plugin. ScriptInterpreterPython is now
an abstract interface that doesn't expose any Python specific types, and
is implemented by the ScriptInterpreterPythonImpl.
Differential revision: https://reviews.llvm.org/D59976
llvm-svn: 357307
The utility library shouldn't depend on curses, libedit or python. Move
curses to core, libedit to host and python to the python plugin.
Differential revision: https://reviews.llvm.org/D59970
llvm-svn: 357287
FindPythonInterp and FindPythonLibs do two things, they set some
variables (PYTHON_LIBRARIES, PYTHON_INCLUDE_DIRS) and update the cached
variables (PYTHON_LIBRARY, PYTHON_INCLUDE_DIR) which are also used to
specify a custom python installation.
I believe the canonical way to do this is to use the PYTHON_LIBRARIES
and PYTHON_INCLUDE_DIRS variables instead of the cached ones. However,
since the cached variables are accessible from the cache and GUI, this
is a lot less confusing when you're trying to debug why a variable did
or didn't get the value you expected. Furthermore, as far as I can tell,
the implementation uses the cached variables to set their LIBRARIES/DIRS
counterparts. This is also the reason this works today even though we
mix-and-match.
Differential revision: https://reviews.llvm.org/D59968
llvm-svn: 357282
For = operators for lists that have mutexes, we were either
just taking the locks sequentially or hand-rolling a trick
to try to avoid lock inversion. Use the std::lock mechanism
for this instead.
Differential Revision: https://reviews.llvm.org/D59957
llvm-svn: 357276
For a single char argument, find_first_of is equal to find and
find_last_of is equal to rfind. While playing around with the plugin
stuff this caused an export failure because it always got inlined except
once, which resulted in an undefined symbol.
llvm-svn: 357198
the collection lock before we iterate over the owners calling ShouldStop.
BreakpointSite::ShouldStop can do a lot of work, and might by chance hit the same breakpoint
site again on another thread. So instead of holding the site's owners lock
while iterating over them calling ShouldStop, I make a local copy of the list, drop the lock
and then iterate over the copy calling BreakpointLocation::ShouldStop.
It's actually quite difficult to make this cause problems because usually all the
action happens on the private state thread, and the lock is recursive.
I have a report where some code hit the ASAN error breakpoint, went to
compile the ASAN error gathering expression, in the course of compiling
that we went to fetch the ObjC runtime data, but the state of the program
was such that the ObjC runtime grubbing function triggered an ASAN error and
we were executing that function on another thread.
I couldn't figure out a way to reproduce that situation in a test. But this is an
NFC change anyway, it just makes the locking strategy more narrowly focused.
<rdar://problem/49074093>
llvm-svn: 357141
Summary:
An TranslationUnitDecl was being brought in from the clang::ASTContext
which required clang specific code to exist in SymbolFilePDB.
Since it was unused we can just get rid of it along with the clang
specific code.
Reviewers: rnk, zturner, compnerd
Reviewed By: compnerd
Subscribers: jdoerfert
Differential Revision: https://reviews.llvm.org/D59804
llvm-svn: 357113
This re-commits r354263, which was because it uncovered with handling of
modules with empty (zero) UUIDs. This would cause us to treat two
modules as intentical even though they were not. This caused an assert
in PlaceholderObjectFile::SetLoadAddress to fire, because we were trying
to load the module twice even though it was designed to be only loaded
at a specific address. (The same problem also existed with the previous
implementation, but it had no asserts to warn us about this.) These
issues have now been fixed in r356896.
windows bot. The issue there was that ObjectFilePECOFF vended its base
address through the incorrect interface. SymbolFilePDB depended on that,
which lead to assertion failures when SymbolFilePDB was attempting to
use the placeholder object files as a base. This has been fixed in
r354258
The original commit message was:
The reason this wasn't working was that ProcessMinidump was creating odd
object-file-less modules, and SymbolFileBreakpad required the module to
have an associated object file because it needed to get its base
address.
This fixes that by introducing a PlaceholderObjectFile to serve as a
dummy object file. The general idea for this is taken from D55142, but
I've reworked it a bit to avoid the need for the PlaceholderModule
class. Now that we have an object file, our modules are sufficiently
similar to regular modules that we can use the regular Module class
almost out of the box -- the only thing I needed to tweak was the
Module::CreateModuleFromObjectFile functon to set the module's FileSpec
in addition to it's architecture. This wasn't needed for ObjectFileJIT
(the other user of CreateModuleFromObjectFile), but it shouldn't hurt it
either, and the change seems like a straightforward extension of this
function.
Reviewers: clayborg, lemo, amccarth
Subscribers: lldb-commits
Differential Revision: https://reviews.llvm.org/D57751
llvm-svn: 357060
This is diagnosed by gcc-8. The ValueType struct already has a default
constructor which performs zero-initialization, so we can just call that
instead of using memset.
llvm-svn: 357056
Summary:
gcc diagnoses this as "array subscript 63 is above array bounds of
'RegisterContextDarwin_arm64::VReg [32]'".
The correct fix seems to be subtracting the fpu register base index, but
I have no way of verifying that this actually works.
Reviewers: jasonmolenda
Subscribers: javed.absar, kristof.beyls, lldb-commits
Differential Revision: https://reviews.llvm.org/D59495
llvm-svn: 357055
Summary:
Instead of assuming that the language is C++ instead check the compunit
for the language it received from the debug info.
Subscribers: aprantl, jdoerfert
Differential Revision: https://reviews.llvm.org/D59805
llvm-svn: 357044
Remove CompilerInstance::VirtualFileSystem and
CompilerInstance::setVirtualFileSystem, instead relying on the VFS in
the FileManager. CompilerInstance and its clients already went to some
trouble to make these match. Now they are guaranteed to match.
As part of this, I added a VFS parameter (defaults to nullptr) to
CompilerInstance::createFileManager, to avoid repeating construction
logic in clients that just wanted to customize the VFS.
https://reviews.llvm.org/D59377
llvm-svn: 357037
Summary:
After D59297, the TypePair class kind of lost its purpose as it was no
longer a "pair". This finishes the job started in that patch and deletes
the class altogether. All usages have been updated to use CompilerType
class directly.
Reviewers: clayborg, jingham, zturner
Subscribers: mehdi_amini, dexonsmith, jdoerfert, lldb-commits
Differential Revision: https://reviews.llvm.org/D59414
llvm-svn: 356993
This is the next step in moving the minidump parsing into llvm. I remove
the minidump structures already defined in the llvm Object library and
convert our parser to use those. NFC.
llvm-svn: 356992
The python plugin uses wrappers generated by swig. For the symbols to be
available, we'd need to link against liblldb, which is not an option
because the symbols could conflict with the static library we are
testing. Instead we define the symbols ourselves in the unit test.
llvm-svn: 356971
With the initialization taking place inside the Python script
interpreter, these function no longer need to be public. The exception
is the g_swig_init_callback which is used from the RAII object.
llvm-svn: 356944
Currently LLDB crashes when autocompleting a command that ends with a
backtick because the quote character wasn't handled. This fixes that and
adds a unit test for this function.
Differential revision: https://reviews.llvm.org/D59779
llvm-svn: 356927
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
Jonas Devlieghere