Commit Graph

14271 Commits

Author SHA1 Message Date
Med Ismail Bennani 103ad3f907 [lldb/Commands] Fix short option collision for `process launch`
This patch changes the short option used in `CommandOptionsProcessLaunch`
for the `-v|--environment` command option to `-E|--environment`.

The reason for that is, that it collides with the `-v|--structured-data-value`
command option generated by `OptionGroupPythonClassWithDict` that
I'm using in an upcoming patch for the `process launch` command.

The long option `--environment` remains the same.

Differential Review: https://reviews.llvm.org/D95100

Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
2021-03-01 21:13:31 +01:00
Jan Kratochvil 011e7bcaa3 Revert "[lldb] Fix handling of `DW_AT_decl_file` according to D91014"
This reverts commit 7ec7876fed.

Non-x86_64 non-Linux bots broke by the testcase.
2021-03-01 20:45:30 +01:00
David Blaikie e913a75414 Fix a warning about named return value not being moved-from.
The use of an rvalue reference here was using reference lifetime
extension needlessly - the code is simpler and more efficient without
it.
2021-03-01 09:25:26 -08:00
Michał Górny c41372c8a1 [lldb] Rename NativeRegisterContext{Watchpoint => DBReg}_x86
Differential Revision: https://reviews.llvm.org/D97210
2021-03-01 16:23:36 +01:00
Andy Yankovsky 7ec7876fed [lldb] Fix handling of `DW_AT_decl_file` according to D91014
Apply changes from https://reviews.llvm.org/D91014 to other places where DWARF entries are being processed.

Differential Revision: https://reviews.llvm.org/D96778
2021-03-01 16:01:11 +01:00
Tatyana Krasnukha 1d6a6f3b0c [lldb/Target] Remove outdated code
Arg0 callback does work.
2021-02-28 19:23:27 +03:00
Tatyana Krasnukha f0f183ee4a [lldb/Interpreter] Fix deep copying for OptionValue classes
Some implementations of the DeepCopy function called the copy constructor that copied m_parent member instead of setting a new parent. Others just leaved the base class's members (m_parent, m_callback, m_was_set) empty.
One more problem is that not all classes override this function, e.g. OptionValueArgs::DeepCopy produces OptionValueArray instance, and Target[Process/Thread]ValueProperty::DeepCopy produces OptionValueProperty. This makes downcasting via static_cast invalid.

The patch implements idiom "virtual constructor" to fix these issues.
Add a test that checks DeepCopy for correct copying/setting all data members of the base class.

Differential Revision: https://reviews.llvm.org/D96952
2021-02-28 19:23:25 +03:00
Tatyana Krasnukha ef447fe008 [lldb] OptionValueProperties::Get[Set]PropertyAtIndexAsArgs should handle OptionValueArgs 2021-02-28 19:23:22 +03:00
Tatyana Krasnukha b2faf30189 [lldb][NFC] Make OptionValueArgs::GetArgs constant 2021-02-28 19:23:20 +03:00
Tatyana Krasnukha 8cdcd41e38 [lldb/Interpreter][NFC] Remove explicit default initialization of members and base classes
According to clang-tidy's readability-redundant-member-init.
2021-02-28 19:23:18 +03:00
Tatyana Krasnukha 54d03a4985 [lldb/Interpreter][NFC] Replace default constructors/destructors bodies with "=default" 2021-02-28 19:23:16 +03:00
Dave Lee 3a677b29a3 [lldb] Add deref support to libc++ unique_ptr synthetic
Add frame variable dereference suppport to libc++ `std::unique_ptr`.

This change allows for commands like `v *thing_up` and `v thing_up->m_id`. These commands now work the same way they would with raw pointers, and as they would with expression. This is done by adding an unaccounted for child member named `$$dereference$$`.

Without this change, the command would have to be written as `v *thing_up.__value_` or v thing_up.__value_->m_id` which exposes internal structure and is more clumsy to type.

Additionally, the existing tests were updated. See also https://reviews.llvm.org/D97165 which added deref support for `std::shared_ptr`.

Differential Revision: https://reviews.llvm.org/D97524
2021-02-26 07:39:01 -08:00
Med Ismail Bennani b889ef4214 [lldb/Core] Change large function threshold variable into a setting.
This patch replaces the static large function threshold variable with a
global debugger setting (`stop-disassembly-max-size`).

The default threshold is now set to 32KB (instead of 8KB) and can be modified.

rdar://74726362

Differential Revision: https://reviews.llvm.org/D97486

Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
2021-02-25 22:35:04 +01:00
Raphael Isemann 86c267233f [lldb][NFC] Document ClangASTImporter 2021-02-25 13:25:34 +01:00
Raphael Isemann 2d6b767c1d [lldb][NFC] Remove some obsolete comments in ClangASTImporter.cpp
The first two comments are incomplete and reference obsolete code. The
last one is just commented out code (that also doesn't look correct).
2021-02-25 11:44:19 +01:00
Raphael Isemann 7cfa6e1cc6 [lldb] Let ClangASTImporter assert that the target AST has an external source
This prevents people from accidentially using this code outside the
intended setup.
2021-02-25 11:42:14 +01:00
Jonas Devlieghere 38dfb235db [lldb] Support debugging utility functions
LLDB uses utility functions to run code in the inferior for its own
internal purposes, such as reading classes from the Objective-C runtime
for example. Because these expressions should be transparent to the
user, we ignore breakpoints and unwind the stack on errors, which
makes them hard to debug.

This patch adds a new setting target.debug-utility-expression that, when
enabled, changes these options to facilitate debugging. It enables
breakpoints, disables unwinding and writes out the utility function
source code to disk so it shows up in the source view.

Differential revision: https://reviews.llvm.org/D97249
2021-02-24 11:36:01 -08:00
Raphael Isemann 6201017d54 [lldb] Prevent double new lines behind errors/warning/messages from LLDB commands
The current API for printing errors/warnings/messages from LLDB commands
sometimes adds newlines behind the messages for the caller. However, this
happens unconditionally so when the caller already specified a trailing newline
in the error message (or is trying to print a generated error message that ends
in a newline), LLDB ends up printing both the automatically added newline and
the one that was in the error message string. This leads to all the randomly
appearing new lines in error such as:

```
(lldb) command a
error: 'command alias' requires at least two arguments
(lldb) apropos a b
error: 'apropos' must be called with exactly one argument.

(lldb) why is there an empty line behind the second error?
```

This code adds a check that only appends the new line if the passed message
doesn't already contain a trailing new line.

Also removes the AppendRawWarning which had only one caller and doesn't serve
any purpose now.

Reviewed By: #lldb, mib

Differential Revision: https://reviews.llvm.org/D96947
2021-02-24 14:42:01 +01:00
Raphael Isemann 0512b01ebe [lldb][NFC] Move trivial ValueObject getters/setters to the header
NFC refactoring that moves the definitions of all the trivial getters/setters to the header file
which is what we usually do in LLVM.

Reviewed By: #lldb, JDevlieghere

Differential Revision: https://reviews.llvm.org/D97298
2021-02-24 14:04:01 +01:00
Raphael Isemann 4631afdeb3 [lldb][NFC] Rename the second ValueObjectManager to ValueObjectUpdater and remove the dead code
`ValueObject.h` contains the `ValueObject::ValueObjectManager` type which is
just a typedef for the ClusterManager that takes care of the whole ValueObject
memory management. However, there is also `ValueObjectManager` defined in the
same header which is only used in the curses UI implementation and consists
mostly of dead and completely untested code.

This code been around since a while (it was added in 2016 as
8369b28da0), so I think we shouldn't just revert
the whole patch.

Instead this patch just moves the class to its own header that it isn't just
hiding in the ValueObject header and renames it to `ValueObjectUpdater` that it
at least has a unique name (which I hope also slightly better reflects the
purpose of this class). I also deleted all the dead code branches and functions.

Reviewed By: #lldb, mib, JDevlieghere

Differential Revision: https://reviews.llvm.org/D97287
2021-02-24 13:58:01 +01:00
Raphael Isemann 2105912ee0 [lldb] Add asserts that prevent construction of cycles in the decl origin tracking
LLDB tracks where any imported `clang::Decl` originally came from via a simple
map from 'imported decl' to 'original decl'. That information is used to later
complete parts of the Decl when more information is requested about a certain
Decl (e.g., via the ExternalASTSource interface from Clang).

When finding the 'original decl' for a given decl, the ASTImporterDelegate
essentially just recursively follows the previously mentioned map from
'imported' to 'original decl' until it can find any further 'original decl'. The
final found decl is then the one that will be imported. The recursion is
necessary as in LLDB we don't just import decls from one ASTContext to another,
but also from one ASTContext to another via a (potentially temporary)
ASTContext. For example, the expression parser creates a temporary ASTContext
for parsing the current expression.

The problem with the recursion is however that if we somehow get a cycle into
our mapping, then the ASTImporterDelegate will just infinite recurse. As the
infinite recursion usually happens after the cycle was already created in a code
path such as completing a type, the crash backtraces we get for these bugs are
not very useful. However having the backtrace where the faulty map entry is
created usually makes the code trivial to fix (as there should be some rogue
CopyType call or something similar nearby. See for example D96366).

This patch tries to make these issues easier to track down by putting a bunch of
sanity asserts in the code that fills out the map. All the asserts are just
checking that there is no direct cycle (ASTContext maps to itself) when updating
the origin tracking map.

The assert in the ASTImportDelegate constructor is an `lldbassert` (which also
is getting checked in release builds with disabled asserts) as the code path
there is pretty cold and we can reliably detect a rogue CopyType call from
there.

I also had to update some code in
`ClangASTImporter::ASTImporterDelegate::Imported`. This code already had a
safety check for creating a cycle in the origin tracking map, but it still
constructed an ASTImporter while checking for the cycle (by requesting a
delegate via `GetDelegate` and passing two identical ASTContexts which looks
like a rogue CopyType call to the checks).

Reviewed By: shafik

Differential Revision: https://reviews.llvm.org/D97300
2021-02-24 13:25:49 +01:00
Jorge Gorbe Moya 979ca1c05f Defer the decision whether to use the CU or TU index until after reading the unit header.
In DWARF v4 compile units go in .debug_info and type units go in
.debug_types. However, in v5 both kinds of units are in .debug_info.
Therefore we can't decide whether to use the CU or TU index just by
looking at which section we're reading from. We have to wait until we
have read the unit type from the header.

Differential Revision: https://reviews.llvm.org/D96194
2021-02-23 13:26:11 -08:00
Dave Lee 0ac42fd26d [lldb] Add deref support and tests to shared_ptr synthetic
Add `frame variable` dereference suppport to libc++ `std::shared_ptr`.

This change allows for commands like `v *thing_sp` and `v thing_sp->m_id`. These
commands now work the same way they do with raw pointers. This is done by adding an
unaccounted for child member named `$$dereference$$`.

Also, add API tests for `std::shared_ptr`, previously there were none.

Differential Revision: https://reviews.llvm.org/D97165
2021-02-23 09:03:46 -08:00
Raphael Isemann bea2d5e478 [lldb][NFC] Remove unused ValueObject::LogValueObject functions
Those functions aren't called anywhere. For debugging purposes we usually
have Dump() methods (which already exist in some semi-functional form in
ValueObject).
2021-02-23 12:10:40 +01:00
Raphael Isemann 03310c1e95 [lldb][NFC] Give CompilerType's IsArrayType/IsVectorType/IsBlockPointerType out-parameters default values
We already do this for most functions that have out-parameters, so let's do
the same here and avoid all the `nullptr, nullptr, nullptr` in every call.
2021-02-23 11:15:31 +01:00
Raphael Isemann d77e3c6aec [lldb][NFC] Don't inherit from UserID in ValueObject
ValueObject inherits from UserID which is just a bad idea:

* The inheritance gives ValueObject some member functions that are at best
  misleading (such as `Clear()` which doesn't clear any value beside `id`).

* It allows passing ValueObject to the overloaded operators for UserID (such as
  `==` or `<<` which won't actually compare or print anything in the ValueObject).

* It exposes the `SetID` and `Clear` which both allow users to change the
  internal id value.

Similar to D91699 which did the same for Process

Reviewed By: #lldb, JDevlieghere

Differential Revision: https://reviews.llvm.org/D97205
2021-02-23 10:15:42 +01:00
Raphael Isemann 8f63cf5da3 [lldb][NFC] Cleanup ValueObject construction code
Just code cleanup for ValueObject constructors:

* Use default member initializers where possible.
* Doxygenify the comments for membersa nd constructors where needed.
* Delete the default constructor which isn't defined.
* Initialize the bitfields via a utility struct instead of doing this in the
  different constructors.

Reviewed By: JDevlieghere

Differential Revision: https://reviews.llvm.org/D97199
2021-02-23 09:39:18 +01:00
Jonas Devlieghere 5d2850161e [lldb] Reinstate support for LLDB_VERSION_STRING
Reinstate support for specifying -DLLDB_VERSION_STRING="best-lldb"
which seems to have gotten accidentally removed in the past.

rdar://38983903

Differential revision: https://reviews.llvm.org/D97235
2021-02-22 16:56:00 -08:00
António Afonso b19d3b092d Revert "Make sure the interpreter module was loaded before making checks against it"
This reverts commit a83a825e99.
2021-02-21 10:38:25 -08:00
António Afonso a83a825e99 Make sure the interpreter module was loaded before making checks against it
This issue was introduced in https://reviews.llvm.org/D92187.
The guard I'm changing were is supposed to act when linux is loading the linker for the second time (due to differences in paths like symlinks).
This is done by checking `module_sp != m_interpreter_module.lock()` however this will be true when `m_interpreter_module` wasn't initialized, making linux unload the linker module (the most visible result here is that lldb will stop getting notified about new modules loaded by the process, because it can't set the rendezvous breakpoint again after the stepping over it once).
The `m_interpreter_module` is not getting initialize when it goes through this path: dbfdb139f7/lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp (L332), which happens when lldb was able to read the address from the dynamic section of the executable.

What I'm not sure about though, is if when we go through this path if we still load the linker twice on linux. If that's the case then it means we need to somehow set the m_interpreter_module instead of the fix I provide here. I've only tested this on Android.

Differential Revision: https://reviews.llvm.org/D96637
2021-02-21 09:28:04 -08:00
Dave Lee b0186c25c6 [lldb] Refine ThreadPlan::ShouldAutoContinue
Adjust `ShouldAutoContinue` to be available to any thread plan previous to the plan that
explains a stop, not limited to the parent to the plan that explains the stop.

Before this change, `Thread::ShouldStop` did the following:

1. find the plan that explains the stop
2. if it's not a master plan, continue processing previous (aka parent) plans
3. first, call `ShouldAutoContinue` on the immediate parent of the explaining plan
4. then loop over previous plans, calling `ShouldStop` and `MischiefManaged`

Of note, the iteration in step 4 does not call `ShouldAutoContinue`, so again only the
plan just prior to the explaining plan is given the opportunity to override whether to
continue or stop.

This commit changes the loop call `ShouldAutoContinue`, giving each plan the opportunity
to override `ShouldStop` of previous plans.

Why? This allows a plan to do the following:

1. mark itself done and be popped off the stack
2. allow parent plans to finish their work, and to also be popped off the stack
3. and finally, have the thread continue, not stop

This is useful for stepping into async functions. A plan will would step far enough
enough to set a breakpoint on the async target, and then use `ShouldAutoContinue` to
unwind the necessary stepping, and then have the calling thread continue.

Differential Revision: https://reviews.llvm.org/D97076
2021-02-20 17:25:31 -08:00
Dave Lee 9d3b9e5799 [lldb] Rename {stop,run}_vote to report_{stop,run}_vote
Rename `stop_vote` and `run_vote` to `report_stop_vote` and `report_run_vote`
respectively. These variables are limited to logic involving (event) reporting only.
This naming is intended to make their context more clear.

Differential Revision: https://reviews.llvm.org/D96917
2021-02-19 13:04:53 -08:00
Jan Kratochvil 08331281af [lldb/Commands] Fix help text typo for 'breakpoint set' -a|--address. 2021-02-19 14:33:42 +01:00
Jason Molenda d82ecb0ac7 LanguageRuntime can provide an UnwindPlan for special occasions
Add a facility in the LanguageRuntime to provide a special
UnwindPlan based on the register values in a RegisterContext,
instead of using the return-pc to find a function and use its
normal UnwindPlans.

Needed when the runtime has special stack frames that we want
to show the user, but aren't actually on the real stack.
Specifically for Swift asynchronous functions.

With feedback from Greg Clayton, Jonas Devlieghere, Dave Lee

<rdar://problem/70398009>

Differential Revision: https://reviews.llvm.org/D96839
2021-02-18 23:23:15 -08:00
Jonas Devlieghere 31fa76fd24 [lldb] Check that files exists before handing them off to FileCollector
The FileCollector asserts that paths passed to addDirectory are indeed
directories. For that to work, the file needs to actually exist. In the
downstream Swift fork we have tests that remove files during testing,
which resulted in this assertion getting triggered.
2021-02-18 16:16:15 -08:00
Jonas Devlieghere 612384f6e0 [lldb] Remove unused code in ScriptInterpreterPython
Remove the unused code I noticed when working on d6e80578fc and do
some other minor cleanups in the vicinity.
2021-02-18 10:38:54 -08:00
Pavel Labath 004a264f8c [lldb] Fix shared library directory computation on windows
Our code for locating the shared library directory works via dladdr (or
the windows equivalent) to locate the path of an address known to reside
in liblldb. This works great for C++ programs, but there's a catch.

When (lib)lldb is used from python (like in our test suite), this dladdr
call will return a path to the _lldb.so (or such) file in the python
directory. To compensate for this, we have code which attempts to
resolve this symlink, to ensure we get the canonical location. However,
here's the second catch.

On windows, this file is not a symlink (but a copy), so this logic
fails. Since most of our other paths are derived from the liblldb
location, all of these paths will be wrong, when running the test suite.
One effect of this was the failure to find lldb-server in D96202.

To fix this issue, I add some windows-specific code to locate the
liblldb directory. Since it cannot rely on symlinks, it works by
manually walking the directory tree -- essentially doing the opposite of
what we do when computing the python directory.

To avoid python leaking back into the host code, I implement this with
the help of a callback which can be passed to HostInfo::Initialize in
order to assist with the directory location. The callback lives inside
the python plugin.

I also strenghten the existing path test to ensure the returned path is
the right one.

Differential Revision: https://reviews.llvm.org/D96779
2021-02-18 15:37:52 +01:00
Raphael Isemann fb1dc77bfd [lldb][NFC] Silence missing case warnings in TypeSystemClang::GetTypeBitAlign due to new RISC-V V types
Those types were added in D92715. This just silences the warning but doesn't
actually add support for those types to LLDB.
2021-02-18 09:03:18 +01:00
Jason Molenda fcdef15d77 Add a new Row setting to mark all un-declared regs as Undefined
Add a new state for UnwindPlan::Row which indicates that any
register not listed is not defined, and should not be found in
stack frames newer than this one and passed up the stack.  Mostly
intended for use with architectural default unwind plans that are
used for jitted stack frames, where we have no unwind information
or start address.  lldb has no way to tell if registers were
spilled in the jitted frame & overwritten, so passing register
values up the stack is not safe to show the user.

Architectural default unwind plans are also used as a fast unwind
plan on x86_64 in particular, and are used as the fallback unwind
plans when lldb thinks it may be able to work around a problem
which causes the unwinder to stop walking the stack early.

For fast unwind plans, when we don't find a register location in
the arch default unwind plan, we fall back to computing & using
the full unwind plan. One small part of this patch is to know that
a register marked as Undefined in the fast unwind plan is a special
case, and we should continue on to the full unwind plan to find what
the real unwind rule is for this register.

Differential Revision: https://reviews.llvm.org/D96829
<rdar://problem/70398009>
2021-02-17 23:52:28 -08:00
Jonas Devlieghere d6e80578fc [lldb] Improve error message for modules with dots or dashes
LLDB does not like to import Python files with dashes or dots in their
name. While the former are technically allowed, it is discouraged. Dots
are allowed for subpackages but not in module names. This patch improves
the user experience by printing a useful error.

Before this patch:

  error: module importing failed: SyntaxError('invalid syntax',
  ('<string>', 1, 11, 'import foo-bar\n'))

After this patch:

  error: module importing failed: Python discourages dashes in module
  names: foo-bar

rdar://74263511

[1] https://www.python.org/dev/peps/pep-0008/#package-and-module-names

Differential revision: https://reviews.llvm.org/D96833
2021-02-17 10:00:29 -08:00
Michał Górny 9f38001bf0 [lldb] [Process/FreeBSD] Ensure that errors are always handled
Ensure that the llvm::Error instances are always considered handled
by replacing LLDB_LOG with LLDB_LOG_ERROR.

Differential Revision: https://reviews.llvm.org/D96558
2021-02-16 22:21:37 +01:00
Pavel Labath 901ea29662 [lldb] Delete superfluous semicolon 2021-02-16 21:07:58 +01:00
Pavel Labath 1db2888e70 [lldb] Remove some nanosleep preprocessor magic
It's obsolete, as we use (portable) std::this_thread::sleep_for now.
2021-02-16 21:07:57 +01:00
Dave Lee 4946f37d84 [lldb] Remove very old misleading comment (NFC) 2021-02-15 18:14:57 -08:00
Dave Lee 22f0aa0d9e [lldb] Remove unused ThreadPlan tracer utilities (NFC)
Delete unused `EnableTracer()` and `SetTracer()` functions on `Thread`. By deleting
these, their `ThreadPlan` counterparts also become unused.

Then, by deleting `ThreadPlanStack::EnableTracer`, `EnableSingleStep` becomes unused.
With no more callers to `EnableSingleStep`, the value `m_single_step` is always true and
can be removed as well.

Differential Revision: https://reviews.llvm.org/D96666
2021-02-15 17:59:25 -08:00
Dave Lee 2a2464eb76 [lldb] Lower GetRealStopInfo into ThreadPlanCallFunction (NFC)
`GetRealStopInfo` has only one call site, and in that call site a reference to the
concrete thread plan is available (`ThreadPlanCallUserExpression`), from which
`GetRealStopInfo` can be called.

Differential Revision: https://reviews.llvm.org/D96687
2021-02-15 17:59:24 -08:00
Dave Lee 65d91b40ae [lldb] Minor refinements to ThreadPlan::RestoreThreadState (NFC)
Correct `RestoreThreadState` to a `void` return type. Also, update the signature of its
callee, `Thread::RestoreThreadStateFromCheckpoint`, by updating it to a `void` return
type, and making it non-`virtual`.

Differential Revision: https://reviews.llvm.org/D96688
2021-02-15 17:57:13 -08:00
Michał Górny bee4d6efe1 [lldb] Rename FreeBSDRemote to FreeBSD (NFC)
Differential Revision: https://reviews.llvm.org/D96557
2021-02-15 13:04:11 +01:00
Michał Górny cd44339856 [lldb] Remove the legacy FreeBSD plugin
The new FreeBSDRemote plugin has reached feature parity with the legacy
plugin, so we can finally remove the latter.  The new plugin will
be renamed to FreeBSD in a separate commit to avoid confusion.

Differential Revision: https://reviews.llvm.org/D96555
2021-02-15 13:04:11 +01:00
Michał Górny 011791dda4 [lldb] [Process/FreeBSDRemote] Fix clang-formatting on ppc commit 2021-02-14 22:34:25 +01:00
Benjamin Kramer 2dbe88db58 [lldb] Fix up SysV ABI implementations after 057efa9916 2021-02-13 01:34:00 +01:00
Adrian Prantl 188b0747c1 Support dereferencing a DWARF scalar stack value
Swift async functions receive function arguments inside a
heap-allocated data structure, similar to how ObjC block captures or
C++ coroutine arguments are implement. In DWARF they are described
relative to an entry value that produces a pointer into that heap
object. At typical location looks like

DW_OP_entry_value [ DW_OP_reg14 ] DW_OP_deref DW_OP_plus_uconst 32 DW_OP_deref

This allows the unwinder (which has special ABI knowledge to restore
the contents of r14) to push the base address onto the stack thus
allowing the deref/offset operations to continue. The result of the
entry value is a scalar, because DW_OP_reg14 is a register location —
as it should be since we want to restore the pointer value contained
in r14 at the beginning of the function and not the historical memory
contents it was pointing to. The entry value should restore the
address, which is still valid, not the contents at function entry.

To make this work, we need to allow LLDB to dereference Scalar stack
results like load addresses, which is what this patch
does. Unfortunately it is difficult to test this in isolation, since
the DWARFExpression unit test doesn't have a process.

Differential Revision: https://reviews.llvm.org/D96549
2021-02-12 16:12:32 -08:00
Adrian Prantl 057efa9916 Make the error condition in Value::ValueType explicit (NFC)
The comment for ValueType claims that all values <1 are errors, but
not all switch statements take this into account. This patch
introduces an explicit Error case and deletes all default: cases, so
we get warned about incomplete switch coverage.

https://reviews.llvm.org/D96537
2021-02-12 16:12:31 -08:00
Shafik Yaghmour 9f175998de [LLDB] Fix LLDB_LOG calls to use correct formatting
It looks like a previous change switched these from LLDB_LOGF but did not update the format strings.

Differential Revision: https://reviews.llvm.org/D96550
2021-02-12 11:09:39 -08:00
Jonas Devlieghere 732534ed64 [lldb] s/TARGET_OS_EMBEDDED/TARGET_OS_IPHONE/
TARGET_OS_EMBEDDED is deprecated, use TARGET_OS_IPHONE and/or
TARGET_OS_SIMULATOR instead.
2021-02-11 20:40:59 -08:00
Jonas Devlieghere 4d3a061c32 [lldb] Fix 'r' and 'run' aliases on Apple Silicon
The 'r' and 'run' aliases were different based on the target
architecture. I suspect the intention was to disable shell expansion on
embedded devices. This fixes TestCustomShell.test on AS.
2021-02-11 20:23:53 -08:00
Peter Collingbourne c314f5ede8 ObjectFileELF: Test whether reloc_header is non-null instead of asserting.
It is possible for the GetSectionHeaderByIndex lookup to fail because
the previous FindSectionContainingFileAddress lookup found a segment
instead of a section. This is possible if the binary does not have
a PLT (which means that lld will in some circumstances set DT_JMPREL
to 0, which is typically an address that is part of the ELF headers
and not in a section) and may also be possible if the section headers
have been stripped. To handle this possibility, replace the assert
with an if.

Differential Revision: https://reviews.llvm.org/D93438
2021-02-11 15:05:18 -08:00
Dave Lee a5ab1dc4ad [lldb] Add step target to ThreadPlanStepInRange constructor
`QueueThreadPlanForStepInRange` accepts a `step_into_target`, but the constructor for
`ThreadPlanStepInRange` does not. Instead, a caller would optionally call
`SetStepInTarget()` in a separate statement.

This change adds `step_into_target` as a constructor argument. This simplifies
construction of `ThreadPlanSP`, by avoiding a subsequent downcast and conditional
assignment. This constructor is already used in downstream repos.

Differential Revision: https://reviews.llvm.org/D96539
2021-02-11 14:57:20 -08:00
Raphael Isemann 71536fd031 [lldb] Fix that running a top level expression without a process fails with a cryptic error
Right now when running `expr --top-level -- void foo() {}`, LLDB just prints a cryptic
`error: Couldn't find $__lldb_expr() in the module` error. The reason for that is
that if we don't have a running process, we try to set our execution policy to always use the
IR interpreter (ExecutionPolicyNever) which works even without a process. However
that code didn't consider the special ExecutionPolicyTopLevel which we use for
top-level expressions. By changing the execution policy to ExecutionPolicyNever,
LLDB thinks we're actually trying to interpret a normal expression inside our
`$__lldb_expr` function and then fails when looking for it.

This just adds an exception for top-level expressions to that code and a bunch of tests.

Reviewed By: shafik

Differential Revision: https://reviews.llvm.org/D91723
2021-02-11 17:07:11 +01:00
Raphael Isemann 19b4d3ce27 [lldb] Don't emit a warning when using Objective-C getters in expressions
Clang emits a warning when accessing an Objective-C getter but not using the result.
This gets triggered when just trying to print a getter value in the expression parser (where
Clang just sees a normal expression like `obj.getter` while parsing).

This patch just disables the warning in the expression parser (similar to what we do with
the C++ equivalent of just accessing a member variable but not doing anything with it).

Reviewed By: kastiglione

Differential Revision: https://reviews.llvm.org/D94307
2021-02-11 16:48:41 +01:00
Raphael Isemann e87b8e4498 [lldb] Log the actual expression result in UserExpression::Evaluate
This used to be a LLDB_LOGF call that used the printf %s syntax.
0ab109d43d changed it to LLDB_LOG but didn't
update this format string to use formatv's syntax so this just printed '%s'.
2021-02-11 16:15:01 +01:00
Adrian Prantl 585e7a359d Diagnose unhandled cases in DW_OP_deref 2021-02-10 17:27:02 -08:00
Dave Lee 309d40f052 [lldb] Use internal_dict name over dict in python examples
Follow up to https://reviews.llvm.org/rG483ec136da7193de781a5284f1c37929cc27c05c
2021-02-10 15:11:00 -08:00
Dave Lee 606c3be85d [lldb] Minor cleanups to ThreadPlan.h (NFC)
While learning about ThreadPlan, I did a bit of cleanup:

* Remove unused code
* Move functions to protected where applicable
* Remove virtual for functions that are not overridden

Differential Revision: https://reviews.llvm.org/D96277
2021-02-10 13:36:38 -08:00
Jim Ingham 483ec136da Use internal_dict everywhere we refer to the python session dict in docs. 2021-02-09 17:48:47 -08:00
Shafik Yaghmour 4f14c17df7 [LLDB] Remove uneeded CopyType from BlockPointerSyntheticFrontEnd
BlockPointerSyntheticFrontEnd does a CopyType which results in it copying the type
back into its own context. This will result in a call to ASTImporterDelegate::setOrigin
with &decl->getASTContext() == origin.ctx this can result in an infinite recursion
later on in ASTImporter since it will attempt to find the decl in its origin which will be itself.

Differential Revision: https://reviews.llvm.org/D96366
2021-02-09 16:11:28 -08:00
Jim Ingham ffd7be65d0 Remove trailing spaces after \ in comments. 2021-02-09 16:06:47 -08:00
Jim Ingham 365b186c24 Add documentation for the extra_args parameter to breakpoint commands.
Differential Revision: https://reviews.llvm.org/D96368
2021-02-09 15:33:36 -08:00
Michał Górny bd03f6df51 [lldb] [Process/FreeBSDRemote] Introduce powerpc support
Introduce a minimal support for the 32-bit powerpc platform.  This
includes support for GPR and FPR registers.  I also needed to add
software breakpoint opcode for PPC32/PPC64 (big endian), and to fix
offsets in RegisterInfos_powerpc.h (used only by FreeBSD register
context to be globally unique rather than relative to each struct).

Differential Revision: https://reviews.llvm.org/D95947
2021-02-09 21:10:45 +01:00
Dave Lee 2309392449 [lldb] Inline invariant params to AppleThreadPlanStepThrough (NFC)
These two `AppleThreadPlanStepThrough` thread plans have parameterized behavior
that is unutilized. To make their interface and implementation simpler, this
change inlines those outside parameters.

Differential Revision: https://reviews.llvm.org/D96276
2021-02-09 08:03:51 -08:00
Dave Lee 7dc324aafa [lldb] Fix crash in FormatEntity for mangled-name
Check a `Block` pointer before dereferencing.

Using `function.mangled-name` led to a crash for a frame where the symbol
context had no block info. In my case, the frame's function was a system frame.

Differential Revision: https://reviews.llvm.org/D96307
2021-02-08 18:38:08 -08:00
Michał Górny 8244fc505d [lldb] [Process/FreeBSDRemote] Introduce mips64 support
Introduce mips64 support to match the legacy FreeBSD plugin. Similarly
to the legacy plugin, the code does not support FPU registers at the
moment.  The support for them will be submitted separately as it
requires changes to the register context shared by both plugins.

This also includes software single-stepping support that is moved from
the Linux plugin into a common Utility class.  The FreeBSD code also
starts explicitly ignoring EINVAL from PT_CLEARSTEP since this is easier
to implement than checking whether hardware single-stepping were used.

Differential Revision: https://reviews.llvm.org/D95802
2021-02-08 18:27:26 +01:00
Frederik Gossen 5a63045fe7 [LLDB] Fix `Wunused-result` warning 2021-02-08 18:10:08 +01:00
Tatyana Krasnukha 36de94cf54 Reland "[lldb] Make CommandInterpreter's execution context the same as debugger's one" 2021-02-08 15:09:09 +03:00
Tatyana Krasnukha a39bcbca92 [lldb] Debugger: reuse ExecutionContextRef to create ExecutionContext from Target
The Debugger didn't take the Process's run lock, that causes deadlocks and races
after applying https://reviews.llvm.org/D92164 revision. Since ExecutionContextRef
does the same job correctly, Debugger::GetSelectedExecutionContext just can use it
to build execution context upon the selected target.
2021-02-08 15:09:08 +03:00
Muhammad Omair Javaid 8561ad9296 Use remote regnums in expedited list, value regs and invalidate regs
Native register descriptions in LLDB specify lldb register numbers in
value_regs and invalidate_regs lists. These register numbers may not
match with Process gdb-remote register numbers which are generated by
native process after counting all registers in its register sets.

It was coincidentally not causing any problems as we never came across
a native target with dynamically changing register sets and register
numbers generated by counter matched with LLDB native register numbers.
This came up while testing target AArch64 SVE which can choose register
sets based on underlying hardware.

This patch fixes this behavior and always tries to use remote register
numbers while reading/writing registers over gdb-remote protocol.

Reviewed By: labath

Differential Revision: https://reviews.llvm.org/D77043
2021-02-08 14:09:15 +05:00
Djordje Todorovic 9abd8c1a4c [elf-core] Improve reading memory from core file
This patch tries to improve memory-read from core files
(in order to improve disassembly functionality).

I am using RHEL 7.7 (linux kernel 3.10) and for a lot of cases,
I was not able to disassemble some functions from backtrace when
debugging crashes from core files. It outputs some dummy code.

The cause of the problem was the fact we are returning all the zeros
from ProcessElfCore::ReadMemory() that is being called within
Disassembler::ParseInstructions() and it disassembles some dummy
opcodes from the buffer returned. Therefore, we are removing zero
bytes filling (padding) completely.

Differential Revision: https://reviews.llvm.org/D93939
2021-02-08 00:14:32 -08:00
Raphael Isemann 6e1afd8587 [lldb][NFC] Minor comment and inlining fixes for Args
The element count getter can just be in the header. Also doxygenify some of the
comments and document m_argv's terminating nullptr element that the other
comments keep mentioning.
2021-02-05 10:17:16 +01:00
Adrian Prantl 644ef58073 Print the "no plugin" warning only when there is no plugin
... and not when the typesystem failed to initialize.

rdar://72562341

Differential Revision: https://reviews.llvm.org/D95992
2021-02-04 11:06:10 -08:00
Jonas Devlieghere 98e50a7d4c [lldb] Honor the CPU type & subtype when launching on macOS
Honor the CPU type (and subtype) when launching the inferior on macOS.

Part of this functionality was thought to be no longer needed and
removed in 85bd436961, however it's still
needed, for example to launch binaries under Rosetta 2 on Apple Silicon.

This patch will use posix_spawnattr_setarchpref_np if available and
fallback to posix_spawnattr_setbinpref_np if not.

Differential revision: https://reviews.llvm.org/D95922
2021-02-03 13:42:00 -08:00
Med Ismail Bennani 608ee55a31
[lldb/test] Stop recording fundamental return types (NFC)
It seems that recording fundamental return type is bogus.

This can trigger asserts when running a test with reproducers so this
patch updates the `SBTarget::IsLoaded` test to stop recording them.

Differential Revision: https://reviews.llvm.org/D95686

Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
2021-02-03 02:57:26 +01:00
Raphael Isemann 0f2be195d5 Revert "[lldb] Use current execution context in SBDebugger"
This reverts commit 754ab803b8.

As pointed out in https://reviews.llvm.org/D95761, this patch could lead to
having the wrong execution context in some situations (thanks Jim!).

D92164 is addressing the same issue and will replace this patch, so I'll
revert this one.
2021-02-02 14:41:48 +01:00
Nathan Hawes ecb00a7762 [VFS] Add support to RedirectingFileSystem for mapping a virtual directory to one in the external FS.
Previously file entries in the -ivfsoverlay yaml could map to a file in the
external file system, but directories had to list their contents in the form of
other file entries or directories. Allowing directory entries to map to a
directory in the external file system makes it possible to present an external
directory's contents in a different location and (in combination with the
'fallthrough' option) overlay one directory's contents on top of another.

rdar://problem/72485443
Differential Revision: https://reviews.llvm.org/D94844
2021-02-02 14:56:17 +10:00
Andy Yankovsky 754ab803b8 [lldb] Use current execution context in SBDebugger
Use `GetSelectedExecutionContext()` instead of
`GetCommandInterpreter().GetExecutionContext()` in
`SBDebugger::GetInternalVariableValue/SBDebugger::SetInternalVariable`. The
execution context in the command interpreter might be empty, if no commands has
been executed yet (it is updated only when handling commands or completions --
e.g.
https://github.com/llvm/llvm-project/blob/main/lldb/source/Interpreter/CommandInterpreter.cpp#L1855).

Reviewed By: teemperor

Differential Revision: https://reviews.llvm.org/D95761
2021-02-01 13:12:42 +01:00
Med Ismail Bennani b8923c0022 [lldb/API] Expose Module::IsLoadedInTarget() to SB API (NFC)
This patch adds an `SBTarget::IsLoaded(const SBModule&) const` endpoint
to lldb's Scripting Bridge API. As the name suggests, it will allow the
user to know if the module is loaded in a specific target.

rdar://37957625

Differential Review: https://reviews.llvm.org/D95686

Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
2021-02-01 12:16:33 +01:00
Michał Górny 9d029362d1 [lldb] [Process/FreeBSDRemote] Introduce arm (32-bit) support
Introduce a NativeRegisterContextFreeBSD for 32-bit ARM platform.
This includes support for GPR + VFP registers as exposed by FreeBSD's
ptrace(2) API.  Hardware breakpoints or watchpoints are not supported
due to missing kernel support.  The code is roughly based on the arm64
context.

It also includes an override for GetSoftwareBreakpointTrapOpcode() based
on the matching code in the PlatformFreeBSD plugin.

Differential Revision: https://reviews.llvm.org/D95696
2021-01-31 19:52:08 +01:00
Michał Górny f43c0707f6 [lldb] [Process/FreeBSDRemote] Introduce arm64 support
Introduce arm64 support in the FreeBSDRemote plugin.  The code
is roughly based on Linux and reuses the same POSIX RegisterInfos
(but the buffers need to be a few bytes larger due to stricter struct
member alignment in FreeBSD structures -- luckily, they do not affect
the actual member offsets).  It supports reading and writing
general-purpose and FPU registers.  SVE and hardware watchpoint support
is missing due to the limitations of FreeBSD ptrace(2) API.

Differential Revision: https://reviews.llvm.org/D95297
2021-01-31 19:52:08 +01:00
Nathan Hawes 719f778441 [VFS] Combine VFSFromYamlDirIterImpl and OverlayFSDirIterImpl into a single implementation (NFC)
As a fixme notes, both of these directory iterator implementations are
conceptually similar and duplicate the functionality of returning and uniquing
entries across two or more directories. This patch combines them into a single
class 'CombiningDirIterImpl'.

This also drops the 'Redirecting' prefix from RedirectingDirEntry and
RedirectingFileEntry to save horizontal space. There's no loss of clarity as
they already have to be prefixed with 'RedirectingFileSystem::' whenever
they're referenced anyway.

rdar://problem/72485443
Differential Revision: https://reviews.llvm.org/D94857
2021-01-30 11:10:10 +10:00
Raphael Isemann e2a1a718bb [lldb] Add move_iterator to supported template list
Identical to previous commits that just add a standard library template to the
supported template list and test it. Adding this rather obscure class to the
template list is mostly caused by the std::deque test unexpectedly referencing
this type when testing against newer libc++ versions on macOS.

Fixes TestQueueFromStdModule and TestQueueFromStdModule on macOS.
Fixes rdar://73213589
2021-01-27 13:52:42 +01:00
Jim Ingham 7636b1f6ef Make SBDebugger::CreateTargetWithFileAndArch work with lldb::LLDB_DEFAULT_ARCH
Second try, handling both a bogus arch string and the "null file & arch" used
to create an empty but valid target.
Also check in that case before logging (previously the logging would have
crashed.)
2021-01-26 12:17:39 -08:00
Raphael Isemann 48e09faa94 [lldb][NFC] Another attempt to fix GCC 5.x compilation
37510f69b4 tried to fix GCC 5.x compilation
by making the enum which is used as a unordered_map key unscoped. However it
seems that in GCC 5.x, enum keys are not supported *at all* in unordered_maps
(at least that's what some trial&error on godbolt tells me). This updates the
workaround to just use an int until GCC 5.x support is dropped.
2021-01-26 19:13:12 +01:00
Dave Lee 90b8ae016b [lldb] Remove unused ThreadPlanStack::GetStackOfKind (NFC)
This function isn't used.

Differential Revision: https://reviews.llvm.org/D95411
2021-01-26 09:22:25 -08:00
Richard Smith 8b11714885 Revert "Fix SBDebugger::CreateTargetWithFileAndArch to accept LLDB_ARCH_DEFAULT."
Also revert "Follow on to: f05dc40c31d1883b46b8bb60547087db2f4c03e3"

After these changes, multiple lldb tests are failing. Calls to
CreateTargetWithFileAndArch(None, None) appear to fail after these
changes.

This reverts commit f05dc40c31 and
1fba21778f.
2021-01-25 18:05:17 -08:00
Duncan P. N. Exon Smith 8b6aedc4c9 ExpressionParser: Migrate to FileEntryRef in ParseInternal, NFC
Migrate to the `FileEntryRef` overload of `SourceManager::createFileID`
(using `FileManager::getOptionalFileRef`) in
`ClangExpressionParser::ParseInternal`.

No functionality change here.

Differential Revision: https://reviews.llvm.org/D92957
2021-01-25 16:38:42 -08:00
Pedro Tammela 532e4203c5 [lldb/Lua] add support for Lua function breakpoint
Adds support for running a Lua function when a breakpoint is hit.

Example:
   breakpoint command add -s lua -F abc

The above runs the Lua function 'abc' passing 2 arguments. 'frame', 'bp_loc' and 'extra_args'.

A third parameter 'extra_args' is only present when there is structured data
declared in the command line.

Example:
   breakpoint command add -s lua -F abc -k foo -v bar

Differential Revision: https://reviews.llvm.org/D93649
2021-01-25 23:40:57 +00:00
Jim Ingham 1fba21778f Follow on to: f05dc40c31
When you pass in a bogus ArchSpec, TargetList.CreateTarget
makes a target with the arch of the executable.  That wasn't the
case with a bogus triple, so this change caused one of the bogus
input data tests to fail.  So check that the ArchSpec is valid
before passing it to CreateTarget.
2021-01-25 14:25:51 -08:00
Jim Ingham f05dc40c31 Fix SBDebugger::CreateTargetWithFileAndArch to accept LLDB_ARCH_DEFAULT.
The API docs in SBDebugger.i claim this should work but it doesn't.  This
should fix it.

Differential Revision: https://reviews.llvm.org/D95164
2021-01-25 12:53:37 -08:00
Walter Erquinigo 4bb6244871 [ThreadPlan] fix exec on Linux 2021-01-25 11:30:48 -08:00
Muhammad Omair Javaid 2fd4d923a8 [LLDB] Define AUXV_AT_HWCAP2 in AuxVector.h
This patch defines AUXV_AT_HWCAP2 for accessing Aux extensions.
2021-01-25 20:48:16 +05:00
Muhammad Omair Javaid b45020cf63 [LLDB] Remove leftovers and typos from RegisterInfos_arm64_sve.h
This patch removes a couple of left-overs and a typo from
RegisterInfos_arm64_sve.h and RegisterInfoPOSIX_arm64.h.
2021-01-25 20:48:15 +05:00