The interpreter gets invoked in the sigint handler to cancel
long-running Python operations. That requires the interpreter
lock, but that may be held by the Python operation that's getting
interrupted, so the mutex needs to be recursive.
<rdar://problem/33179086>
llvm-svn: 307942
Store file descriptors from loop.m_read_fds (if FORCE_PSELECT is
defined) and signals from loop.m_signals that need to be processed in
MainLoop::RunImpl::ProcessEvents() into a separate vector and then
iterate over this container to invoke the callbacks.
This prevents a problem where when the code iterated directly over
m_read_fds/m_signals, a callback invoked from within the loop could
modify these variables and invalidate the loop iterator. This would then
result in an assertion failure in llvm::DenseMapIterator::operator++().
Differential Revision: https://reviews.llvm.org/D35298
llvm-svn: 307782
Summary:
This patch adds support for sending strings along with
error codes in the reply packets. The implementation is
based on the feedback recieved in the lldb-dev mailing
list. The patch also adds an extra packet for the client
to query if the server has the capability to provide
strings along with error replys.
Reviewers: labath, jingham, sas, lldb-commits, clayborg
Reviewed By: labath, clayborg
Differential Revision: https://reviews.llvm.org/D34945
llvm-svn: 307768
Summary:
Testing the value of type_code against the closed enum TypeCodes
provides statically verifiable completeness of testing. However, one
branch assigns to type_code by casting directly from a masked integer
value. This is currently handled by adding a default: case after
checking each TypeCodes instance. This patch introduces a bool variable
containing the "default" state value, allowing the switch to be
exhaustive, protect against future instances not being handled in the
switch, and preserves the original logic.
This addresses the warning:
warning: default label in switch which covers all enumeration values
[-Wcovered-switch-default]
As an issue of maintainability, the bitmask on line 524 handles the
current values of TypeCodes enum, but this will be invalid if the enum
is extended. This patch does not address this, and a more closed
conversion from cfinfoa -> TypeCodes would help protect against this.
Reviewers: spyffe, lhames, sas
Reviewed By: sas
Subscribers: sas, lldb-commits
Differential Revision: https://reviews.llvm.org/D35036
llvm-svn: 307712
In NativeProcessLinux::MonitorSIGTRAP we were asserting that the si_code
value is one of the codes we know about. However, that list was very
incomplete -- for example, we were not handling SI_TKILL/SI_USER,
generated by raise(SIGTRAP). A cursory examination show there are at
least a dozen codes like these that an app can generate, and more can be
added at any point.
So, instead of trying to play catchup, I change the default behavior to
treat an unknown si_code like an ordinary signal. The only reason we
needed to inspect si_code in the first place is because
watchpoint/breakpoints are notified as SIGTRAP, but we already know
about those, and us starting to use a new debug event is far less likely
than somebody introducing a new non-debug event.
I add a test case to TestRaise to verify we are handling raise(SIGTRAP)
in an application properly.
llvm-svn: 307644
Summary:
On linux on ppc64le some of the enums in AuxVector have the same name
as macros defined in the system.
Reviewers: mikesart, labath
Reviewed By: labath
Subscribers: joerg, gut, krytarowski, lldb-commits
Differential Revision: https://reviews.llvm.org/D35065
Patch by Bruno Rosa <bruno.rosa@eldorado.org.br>
llvm-svn: 307632
blocks of memory, and if the final bytes of that block look like a long
x86 instruction, it can cause the llvm disassembler to read past the end
of the buffer. Use the maximum allowed instruction length that we pass
to the llvm disassembler as a way to limit this to the size of the buffer.
An example of how to trigger this is when lldb does a function call, it
puts a breakpoint on the beginning of main() and uses that as the return
address from the function call. When we stop at that location, lldb may
try to find the first frame up the stack. Because this is on the first
instruction of a function, it will get the word-size value at the stack
pointer and assume that this was the caller's pc value. But this is random
stack memory and could point to anything - an object in memory, something
in the data section, whatever. And if we have a symbol for that thing,
we'll try to disassemble it.
This was leading to infrequent crashes in customer scenarios; figured out
what was happening with address sanitizer.
<rdar://problem/30463256>
llvm-svn: 307454
Summary:
This replaces the static functions used for creating
NativeProcessProtocol instances with a factory pattern, and modernizes
the interface of the new class in the process -- I use llvm::Expected
instead of the Status+value combo. I also move some of the common code
(like the Delegate registration into the base class). The new
arrangement has multiple benefits:
- it removes the NativeProcess*** dependency from Process/gdb-remote
(which for example means that liblldb no longer pulls in this code).
- it enables unit testing of the GDBRemoteCommunicationServerLLGS class
(by providing a mock Native Process).
- serves as another example on how to use the llvm::Expected class (I
couldn't get rid of the Initialize-type functions completely here
because of the use of shared_from_this, but that's the next thing on
my list here)
Tests still pass on Linux and I've made sure NetBSD compiles after this.
Reviewers: zturner, eugene, krytarowski
Subscribers: srhines, lldb-commits, mgorny
Differential Revision: https://reviews.llvm.org/D33778
llvm-svn: 307390
Summary:
The capture() function was removed in r306625. This should fix PGO breakages
reported by Michael Zolotukhin.
Reviewers: mzolotukhin
Subscribers: sanjoy, llvm-commits
Differential Revision: https://reviews.llvm.org/D35088
llvm-svn: 307320
Starting with android ndk r15, clang much more tests are affected by the
-mstackrealign bugl (now nearly all functions are affected, and not just
the ones requiring 16-byte alignment). Due to their numbers, Xfailing
all of them is not a viable option, so we will just have to declare this
configuration unsupported, and wait until ndk ships a clang version that
has this bug fixed.
llvm-svn: 307252
to make a target, set a source regex breakpoint, run to
the breakpoint and find the thread that hit the breakpoint.
Start the process of replacing the boiler plate with this
routine.
llvm-svn: 307234
This adds a simple testcase for MainThreadCheckerRuntime. The tool (Main Thread Checker) is only available on Darwin, so the test also detects the presence of libMainThreadChecker.dylib and is skipped if the tool is not available.
llvm-svn: 307170
Summary:
On older android targets, we needed a dlopen rename workaround to get
"process load" working. Since API 26 this is not required as the targets
have a proper libdl so with the function names one would expect.
To make this work I've had to remove the const qualifier from the
GetLibdlFunctionDeclarations function (as now the declarations can
depend on the connected target). Since I was already modifying the
prototype (and the lower levels were already converted to StringRef) I
took the oportunity to convert this function as well.
llvm-svn: 307160
Summary:
Due to recent refactors, the descriptions of various modules were wildly
out of date. With this patch, I am not trying to legislate anything,
I am merely documenting the current state of affairs.
I am also deleting one copy of the architecture docs. AFAIK, this one is
not referenced from the web page.
Reviewers: zturner, jingham
Subscribers: lldb-commits
Differential Revision: https://reviews.llvm.org/D34872
llvm-svn: 307072
Summary:
The std::move was preventing copy ellision when compiled with
clang, the patch fixes the warning along with rearranging code
to remove unused variables warnings on Linux machines with
older perf_event interface.
Reviewers: labath, ted
Reviewed By: labath
Differential Revision: https://reviews.llvm.org/D34946
llvm-svn: 307030
NSSetM has two in-memory representations depending on what Foundation version is in use.
This patch separates the two.
rdar://33057292
Differential Revision: https://reviews.llvm.org/D34821
llvm-svn: 306773
All android builds systems have switched to -mstackrealign for building
x86 binaries, so follow their cue with our mini build system.
This presently breaks just one test (TestReturnValue), and this is due
to a compiler bug, which has already been fixed in clang, but it hasn't
made it yet into the official NDK compiler. While I'm touching that
test, I also remove an android-specific XFAIL, which is not relevant
anymore.
llvm-svn: 306683
Summary:
The classes have no dependencies, and they are used both by lldb and
lldb-server, so it makes sense for them to live in the lowest layers.
Reviewers: zturner, jingham
Subscribers: emaste, mgorny, lldb-commits
Differential Revision: https://reviews.llvm.org/D34746
llvm-svn: 306682
Summary:
Fetching an input file required about five lines of code, and this was
repeated in multiple unit tests, with slight variations. Add a helper
function for doing that into the lldbUtilityMocks module (which I rename
to lldbUtilityHelpers to commemorate the fact it includes more than
mocks)
Reviewers: zturner, eugene
Subscribers: emaste, mgorny, lldb-commits
Differential Revision: https://reviews.llvm.org/D34683
llvm-svn: 306668
Summary:
The instruction pattern:
and $-16, %esp
sub $imm, %esp
...
lea imm(%ebp), %esp
appears when the compiler is realigning the stack (for example in
main(), or almost everywhere with -mstackrealign switch). The "and"
instruction is very difficult to model, but that's not necessary, as
these frames are always %ebp-based (the compiler also needs a way to
restore the original %esp). Therefore the plans we were generating for
these function were almost correct already. The only place we were doing
it wrong were the last instructions of the epilogue (usually just
"ret"), where we had to revert to %esp-based unwinding, as the %ebp had
been popped already.
This was wrong because our "distance of esp from cfa" counter had picked
up the "sub" instruction (and incremented the counter) but it had not
seen that the register was reset by the "lea" instruction.
This patch fixes that shortcoming, and adds a test for handling
functions like this.
I have not been able to tickle the compiler into producing a 64-bit
function with this pattern, but I don't see a reason why it couldn't
produce it, if it chose to, so I add a x86_64 test as well.
Reviewers: jasonmolenda, tberghammer
Subscribers: lldb-commits
Differential Revision: https://reviews.llvm.org/D34750
llvm-svn: 306666
some methods in the ABI need a Process to do their work.
Instead of passing it in as a one-off argument to those
methods, this patch puts it in the base class and the methods
can retrieve if it needed.
Note that ABI's are sometimes built without a Process
(e.g. SBTarget::GetStackRedZoneSize) so it's entirely
possible that the process weak pointer will not be
able to reconsistitue into a strong pointer.
<rdar://problem/32526754>
llvm-svn: 306633
Summary:
instead of using a boolean to differentiate between the two section
types, use an enum to make the intent clearer.
I also remove the RegisterKind argument from the constructor, as this
can be deduced from the Type argument.
Reviewers: clayborg, jasonmolenda
Subscribers: lldb-commits
Differential Revision: https://reviews.llvm.org/D34681
llvm-svn: 306521
Summary:
This patch implements support for Intel(R) Processor Trace
in lldb server. The changes have support for
starting/stopping and reading the trace data. The code
is only available on Linux versions where the perf
attributes for aux buffers are available.
The patch also consists of Unit tests for testing the
core buffer reading function.
Reviewers: lldb-commits, labath, clayborg, zturner, tberghammer
Reviewed By: labath, clayborg
Subscribers: mgorny
Differential Revision: https://reviews.llvm.org/D33674
llvm-svn: 306516
This makes automatic checkout work even in situations where the
current repository can't be determined, such as in the case of a
Git tag.
llvm-svn: 306460
1) Renaming the InstrumentationRuntime directory & file names
2) Bunch of stuff moved from Core to Utility
3) Deleted a bunch of files records for files that have gone away
llvm-svn: 306445
Summary:
This is a beefed-up version of D33504, which adds support for dwarf 4
debug_frame section format.
The main difference here is that the decision whether to use eh_frame or
debug_frame is done on a per-function basis instead of per-object file.
This is necessary because one module can contain both sections (for
example, the start files added by the linker will typically pull in
eh_frame), but we want to be able to access both, for maximum
information.
I also add unit test for parsing various CFI formats (eh_frame,
debug_frame v3 and debug_frame v4).
Reviewers: jasonmolenda, clayborg
Subscribers: mgorny, aprantl, abidh, lldb-commits, tatyana-krasnukha
Differential Revision: https://reviews.llvm.org/D34613
llvm-svn: 306397
Summary:
It had a dependency on StringConvert and file reading code, which is not
in Utility. I've replaced that code by equivalent llvm operations.
I've added a unit test to demonstrate that parsing a file still works.
Reviewers: zturner, jingham
Subscribers: kubamracek, mgorny, lldb-commits
Differential Revision: https://reviews.llvm.org/D34625
llvm-svn: 306394
Summary:
These interfaces have no dependencies, so it makes sense for them to be
in the lowest level modules, to make sure that other parts of the
codebase can use them without introducing loops.
The only exception here is the Connection::CreateDefaultConnection
method, which I've moved to Host, as it instantiates concrete
implementations, and that's where the implementations live.
Reviewers: jingham, zturner
Subscribers: lldb-commits, mgorny
Differential Revision: https://reviews.llvm.org/D34400
llvm-svn: 306391
Summary:
The new UndefinedBehaviorSanitizer plugin was breaking file path length
limits, because it's (fairly long name) appears multiple times in the
path. Cmake ends up putting the object file at path
tools/lldb/source/Plugins/InstrumentationRuntime/UndefinedBehaviorSanitizer/CMakeFiles/lldbPluginInstrumentationRuntimeUndefinedBehaviorSanitizer.dir/UndefinedBehaviorSanitizerRuntime.cpp.obj
which is 191 characters long and very dangerously close to the 260
character path limit on windows systems (also, just the include line for
that file was breaking the 80 character line limit).
This renames the sanitizer plugins to use shorter names (asan, ubsan,
tsan). I think this will still be quite understandable to everyone as
those are the names everyone uses to refer to them anyway.
Reviewers: zturner, kubamracek, jingham
Subscribers: lldb-commits, mgorny
Differential Revision: https://reviews.llvm.org/D34553
llvm-svn: 306278
This was broken due to directly including windows.h, which
caused a problem when someone in LLVM called std::min in a header
file. LLDB has a windows.h include to work around this, but it
wasn't being used in these two files.
llvm-svn: 306186
Summary: Reported by coverity, I don't know how to provide a test.
Reviewers: zturner
Subscribers: lldb-commits, emaste
Differential Revision: https://reviews.llvm.org/D34550
llvm-svn: 306134
Instead of every test creating a client-server combo, do that in the
SetUp method of the test fixture. This also means that we can rely on
gtest to not run the test if the SetUp method fails and delete the
if(HasFailure) calls.
llvm-svn: 306013
PyObject_CallFunction returns a PyObject which needs to be
decref'ed when it is no longer needed.
Patch by David Luyer
Differential Revision: https://reviews.llvm.org/D33740
llvm-svn: 305873
Summary:
This is basically a revert of D16107 and parts of D10800, which were
trying to get vdso loading working. They did this by implementing a
generic load-an-elf-file from memory approach, which is not correct,
since we cannot assume that an elf file is loaded in memory in full (it
usually isn't, as there's no need to load section headers for example).
This meant that we would read garbage instead of section sizes, and if
that garbage happened to be a large number, we would crash while trying
to allocate a buffer to accomodate the hypothetical section.
Instead of this, I add a bit of custom code to load the vdso to
DynamicLoaderPOSIXDYLD (which already needed to handle the vdso
specially). I determine the size of the memory to read using
Process::GetMemoryRegionInfo, which is information coming from the OS,
and cannot be forged by a malicious/misbehaving application.
Reviewers: eugene, clayborg
Subscribers: lldb-commits, ravitheja, tberghammer, emaste
Differential Revision: https://reviews.llvm.org/D34352
llvm-svn: 305780
Summary:
Use c++11 thread_local variables instead. As far as I am aware, they are
supported by all compilers/targets we care about.
Reviewers: zturner, jingham
Subscribers: lldb-commits
Differential Revision: https://reviews.llvm.org/D34274
llvm-svn: 305779
I was seeing some unlikely errno values here. I am not sure if this will
help, but it nontheless seems like a good idea to stash errno value
before issuing other syscalls.
llvm-svn: 305778
Summary:
A number of places were trying to decode the result of wait(). Add a simple
utility function that does that and a struct that encapsulates the
decoded result. Then also provide a pretty-printer for that class.
Reviewers: zturner, krytarowski, eugene
Subscribers: lldb-commits, mgorny
Differential Revision: https://reviews.llvm.org/D33998
llvm-svn: 305689
Summary:
The motivation for this is to make sure the first row of the plan
compares equal to the first row of a generic debug_frame unwind plan.
Right now, the code in FuncUnwinders::GetUnwindPlanAtNonCallSite
considers them unequal because they specify the return address in a
different way (SetReturnAddressRegister(LR) vs. an explicit PC=LR rule).
This means that FuncUnwinders would always choose the debug_frame unwind
plan, which is not correct, as that one is usually not correct at all
locations.
Right now this is basically a noop because we don't have parse any
debug_frame plans, but it fixes some test failures when merging D33504
in.
I have to say I don't understand the full implications of the switch to
SetReturnAddressRegister() way of doing things, but given that all of
our other unwind plans (eh_frame, instruction profiling) do it this way,
it sounds like the right thing to do.
Reviewers: tberghammer, jasonmolenda, omjavaid
Subscribers: aemerson, javed.absar, kristof.beyls, lldb-commits
Differential Revision: https://reviews.llvm.org/D34199
llvm-svn: 305687
Summary:
ProcessLauncherPosix was using posix_spawn for launching the process,
but this function is not available on all platforms we support, and even
where it was avaialable, it did not support the full range of options we
require for launching (most importantly, launching in stop-on-entry
mode). For these reasons, the set of ifdefs around these functions has
grown untractably large, and we were forced to implement our own
launcher from more basic primitives anyway (ProcessLauncherPosixFork --
used on Linux, Android, and NetBSD).
Therefore, I remove this class, and move the relevant parts of the code
to the darwin-specific Host.mm file. This is the platform that code was
originally written for anyway, and it's the only platform where this
implementation makes sense (e.g. the lack of the "thread-specific
working directory" concept makes these functions racy on all other
platforms). This allows us to remove a lot of ifdefs and simplify the
code.
Effectively, the only change this introduces is that FreeBSD will now
use the fork-based launcher instead of posix_spawnp. That sholdn't be a
problem as this approach works at least on one other BSD-based system
already.
Reviewers: krytarowski, emaste, jingham
Subscribers: srhines, mgorny, lldb-commits
Differential Revision: https://reviews.llvm.org/D34236
llvm-svn: 305686
the FileSpec methods for adding/removing file path components instead
of using std::strings; feedback from Sean on the change I added in
r305441.
<rdar://problem/31825940>
llvm-svn: 305547
The simple module import logic was not sufficient for our distribution
model of lldb, which is without the _lldb.pyd file (normally that would
be a symlink to the shared library, but symlinks are not really a thing
on windows).
With the older swigs it worked (loading of the python scripting
machinery from within lldb) because the normal swig import logic
contained a last-ditch import of a global module _lldb (which is defined
when you run python from lldb). Add back the last-ditch import to our
custom import logic as well.
llvm-svn: 305461
components to not depend on "." characters in the fileanme
(e.g. "Foundation.framework") but instead to just use path
separators. The names of the files themselves may have dots
in them ("com.apple.sbd") which would break the old scheme.
Also add a test case for this (macosx/find-dsym/bundle-with-dot-in-filename)
as well as a test case for r304520 (macosx/find-dsym/deep-bundle)
which needed a similar setup to test correctly on a single machine.
(both of these are really testing remote debug session situations
where the binary can't be found on the system where lldb is running,
complicating the test case a bit.)
<rdar://problem/31825940>
llvm-svn: 305441
NSString is loaded from the DWARF, which doesn't have the concept of protocols.
When this is used with the NSMutableDictionary type from Objective-C modules,
this produces errors of the form
error: cannot initialize a parameter of type 'id<NSCopying> _Nonnull' with an rvalue of type 'NSString *'
We're aware of these problems and have an internal bug report filed
(<rdar://problem/32777981>)
llvm-svn: 305424
The step count depends on code generated by compiler (GCC/Clang).
It will also vary for different MIPS arch variant. Hence skipping these test for MIPS.
Subscribers: jaydeep, bhushan, lldb-commits, slthakur
llvm-svn: 305383
Clang does not accept regparm attribute on these platforms.
Fortunately, the default calling convention passes arguments
in registers any way
Subscribers: jaydeep, bhushan, lldb-commits, slthakur
llvm-svn: 305378
This test started being flaky since r303848 (RunThreadPlan: Fix halting
logic in IgnoreBreakpoints = false). I am not reverting that, as I am
confident that actually fixed a problem. A more likely explanation is
that there is still one corner case that is not handled correctly there.
Marking the test as flaky until I get a chance to investigate. I also
mark the test as no-debug-info-dependend -- it stresses expression
evaluation, as far as debug info goes, the test if extremely simple.
llvm-svn: 305286
This patch introduces a new thread backtrace command "unique".
The command is based off of "thread backtrace all" but will instead
find all threads which share matching call stacks and de-duplicate
their output, listing call stack and all the threads which share it.
This is especially useful for apps which use thread/task pools
sitting around waiting for work and cause excessive duplicate output.
I needed this behavior recently when debugging a core with 700+ threads.
Differential Revision: https://reviews.llvm.org/D33426
Reviewers: clayborg, jingham
Patch by Brian Gianforcaro <b.gianfo@gmail.com>
llvm-svn: 305197
I was over-eager to unable this test in r304976. It still fails in this
combination, at there does not seem to be anything we can do about it,
as the generated code does not preserve the link register.
llvm-svn: 305062
Summary:
When a call instruction is the last instruction in a function, the
backtrace PC will point past the end of the function. We already had
special code to handle that, but we did not handle the case where the PC
ends up outside of the bounds of the module containing the function,
which is a situation that occured in TestNoreturnUnwind on android for
some arch/compiler combinations.
I fix this by adding an argument to Address resolution code which states
that we are ok with addresses pointing to the end of a module/section to
resolve to that module/section.
I create a reproducible test case for this situation by hand-crafting an
executable which has a noreturn function at the end of a module.
Reviewers: jasonmolenda, jingham
Subscribers: lldb-commits
Differential Revision: https://reviews.llvm.org/D32022
llvm-svn: 304976
The function does not persist the callback, so using a lighter-weight
asbtraction seems appropriate.
Also tweak the signatures of the lambdas to match what the TaskMap
interface expects.
llvm-svn: 304924
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
strerror is not thread-safe. llvm's StrError tries hard to retrieve the
string in a thread-safe way and falls back to strerror only if it does
not have another way.
llvm-svn: 304795
Summary:
This is a new C++ test framework based on Google Test, and one working
example test.
The intention is to replace the existing tests in
packages/Python/lldbsuite/test/tools/lldb-server/ with this suite
and use this framework for all new client server tests.
Reviewers: labath, beanz
Reviewed By: labath, beanz
Subscribers: beanz, emaste, zturner, tberghammer, takuto.ikuta, krytarowski, mgorny, lldb-commits
Differential Revision: https://reviews.llvm.org/D32930
Patch by Jason Majors <jmajors@google.com>
llvm-svn: 304793
Summary:
Don't access `name[1] if the string is only of length 1. Avoids a
crash/assertion failure when parsing the string `-`.
Test Plan:
Debug a swift binary, set a breakpoint, watch lldb not crash
Original change by Paul Menage <menage@fb.com>
Reviewers: lldb-commits, clayborg
Differential Revision: https://reviews.llvm.org/D33853
llvm-svn: 304725
Jim Ingham