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(#109062)
If your arguments or option values are of a type that naturally uses one
of our common completion mechanisms, you will get completion for free.
But if you have your own custom values or if you want to do fancy things
like have `break set -s foo.dylib -n ba<TAB>` only complete on symbols
in foo.dylib, you can use this new mechanism to achieve that.
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of it (#109498)
This patch re-lands #105449 and fixes the various test failures.
---------
Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>
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...and "[lldb/Interpreter] Introduce `ScriptedStopHook{,Python}Interface` & make use of it (#105449)"
This reverts commit 76b827bb4d5b4cc4d3229c4c6de2529e8b156810, and commit 1e131ddfa8f1d7b18c85c6e4079458be8b419421
because the first commit caused the test command-stop-hook-output.test to fail.
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of it (#105449)
This patch introduces new `ScriptedStopHook{,Python}Interface` classes
that make use of the Scripted Interface infrastructure and makes use of
it in `StopHookScripted`.
It also relax the requirement on the number of argument for initializing
scripting extension if the size of the interface parameter pack contains
1 less element than the extension maximum number of positional arguments
for this initializer.
This addresses the cases where the embedded interpreter session
dictionary is passed to the extension initializer which is not used most
of the time.
---------
Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>
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backtraces (#104523)""
This reverts commit 547917aebd1e79a8929b53f0ddf3b5185ee4df74.
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(#104523)"
This reverts commit f01f80ce6ca7640bb0e267b84b1ed0e89b57e2d9.
This commit introduces an msan violation. See the discussion on https://github.com/llvm/llvm-project/pull/104523.
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Compilers and language runtimes often use helper functions that are
fundamentally uninteresting when debugging anything but the
compiler/runtime itself. This patch introduces a user-extensible
mechanism that allows for these frames to be hidden from backtraces and
automatically skipped over when navigating the stack with `up` and
`down`.
This does not affect the numbering of frames, so `f <N>` will still
provide access to the hidden frames. The `bt` output will also print a
hint that frames have been hidden.
My primary motivation for this feature is to hide thunks in the Swift
programming language, but I'm including an example recognizer for
`std::function::operator()` that I wished for myself many times while
debugging LLDB.
rdar://126629381
Example output. (Yes, my proof-of-concept recognizer could hide even
more frames if we had a method that returned the function name without
the return type or I used something that isn't based off regex, but it's
really only meant as an example).
before:
```
(lldb) thread backtrace --filtered=false
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
* frame #0: 0x0000000100001f04 a.out`foo(x=1, y=1) at main.cpp:4:10
frame #1: 0x0000000100003a00 a.out`decltype(std::declval<int (*&)(int, int)>()(std::declval<int>(), std::declval<int>())) std::__1::__invoke[abi:se200000]<int (*&)(int, int), int, int>(__f=0x000000016fdff280, __args=0x000000016fdff224, __args=0x000000016fdff220) at invoke.h:149:25
frame #2: 0x000000010000399c a.out`int std::__1::__invoke_void_return_wrapper<int, false>::__call[abi:se200000]<int (*&)(int, int), int, int>(__args=0x000000016fdff280, __args=0x000000016fdff224, __args=0x000000016fdff220) at invoke.h:216:12
frame #3: 0x0000000100003968 a.out`std::__1::__function::__alloc_func<int (*)(int, int), std::__1::allocator<int (*)(int, int)>, int (int, int)>::operator()[abi:se200000](this=0x000000016fdff280, __arg=0x000000016fdff224, __arg=0x000000016fdff220) at function.h:171:12
frame #4: 0x00000001000026bc a.out`std::__1::__function::__func<int (*)(int, int), std::__1::allocator<int (*)(int, int)>, int (int, int)>::operator()(this=0x000000016fdff278, __arg=0x000000016fdff224, __arg=0x000000016fdff220) at function.h:313:10
frame #5: 0x0000000100003c38 a.out`std::__1::__function::__value_func<int (int, int)>::operator()[abi:se200000](this=0x000000016fdff278, __args=0x000000016fdff224, __args=0x000000016fdff220) const at function.h:430:12
frame #6: 0x0000000100002038 a.out`std::__1::function<int (int, int)>::operator()(this= Function = foo(int, int) , __arg=1, __arg=1) const at function.h:989:10
frame #7: 0x0000000100001f64 a.out`main(argc=1, argv=0x000000016fdff4f8) at main.cpp:9:10
frame #8: 0x0000000183cdf154 dyld`start + 2476
(lldb)
```
after
```
(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
* frame #0: 0x0000000100001f04 a.out`foo(x=1, y=1) at main.cpp:4:10
frame #1: 0x0000000100003a00 a.out`decltype(std::declval<int (*&)(int, int)>()(std::declval<int>(), std::declval<int>())) std::__1::__invoke[abi:se200000]<int (*&)(int, int), int, int>(__f=0x000000016fdff280, __args=0x000000016fdff224, __args=0x000000016fdff220) at invoke.h:149:25
frame #2: 0x000000010000399c a.out`int std::__1::__invoke_void_return_wrapper<int, false>::__call[abi:se200000]<int (*&)(int, int), int, int>(__args=0x000000016fdff280, __args=0x000000016fdff224, __args=0x000000016fdff220) at invoke.h:216:12
frame #6: 0x0000000100002038 a.out`std::__1::function<int (int, int)>::operator()(this= Function = foo(int, int) , __arg=1, __arg=1) const at function.h:989:10
frame #7: 0x0000000100001f64 a.out`main(argc=1, argv=0x000000016fdff4f8) at main.cpp:9:10
frame #8: 0x0000000183cdf154 dyld`start + 2476
Note: Some frames were hidden by frame recognizers
```
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Reverts https://github.com/llvm/llvm-project/pull/97273 since it broke
the windows bot:
https://lab.llvm.org/buildbot/#/builders/141/builds/1025/steps/4/logs/stdio
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This patch tries to fix the following build failure on windows:
https://lab.llvm.org/buildbot/#/builders/141/builds/1083
This started happening following 2914a4b88837, and it seems to be caused
by some special `#include` ordering for the lldb-python header on Windows.
Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>
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(#94823)
Among other things, returning an empty string as the repeat command
disables auto-repeat, which can be useful for state-changing commands.
There's one remaining refinement to this setup, which is that for parsed
script commands, it should be possible to change an option value, or add
a new option value that wasn't originally specified, then ask lldb "make
this back into a command string". That would make doing fancy things
with repeat commands easier.
That capability isn't present in the lldb_private side either, however.
So that's for a next iteration.
I haven't added this to the docs on adding commands yet. I wanted to
make sure this was an acceptable approach before I spend the time to do
that.
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(#70392) (#96868)
This patch makes ScriptedThreadPlan conforming to the ScriptedInterface
& ScriptedPythonInterface facilities by introducing 2
ScriptedThreadPlanInterface & ScriptedThreadPlanPythonInterface classes.
This allows us to get rid of every ScriptedThreadPlan-specific SWIG
method and re-use the same affordances as other scripting offordances,
like Scripted{Process,Thread,Platform} & OperatingSystem.
To do so, this adds new transformer methods for `ThreadPlan`, `Stream` &
`Event`, to allow the bijection between C++ objects and their python
counterparts.
This just re-lands #70392 after fixing test failures.
Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>
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(Reland #70392)" (#93153)
Reverts llvm/llvm-project#93149 since it breaks
https://lab.llvm.org/buildbot/#/builders/68/builds/74799
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#70392) (#93149)
This patch makes ScriptedThreadPlan conforming to the ScriptedInterface
& ScriptedPythonInterface facilities by introducing 2
ScriptedThreadPlanInterface & ScriptedThreadPlanPythonInterface classes.
This allows us to get rid of every ScriptedThreadPlan-specific SWIG
method and re-use the same affordances as other scripting offordances,
like Scripted{Process,Thread,Platform} & OperatingSystem.
To do so, this adds new transformer methods for `ThreadPlan`, `Stream` &
`Event`, to allow the bijection between C++ objects and their python
counterparts.
This just re-lands #70392 after fixing test failures.
Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>
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CommandObjectParsed (#70734)
This allows you to specify options and arguments and their definitions
and then have lldb handle the completions, help, etc. in the same way
that lldb does for its parsed commands internally.
This feature has some design considerations as well as the code, so I've
also set up an RFC, but I did this one first and will put the RFC
address in here once I've pushed it...
Note, the lldb "ParsedCommand interface" doesn't actually do all the
work that it should. For instance, saying the type of an option that has
a completer doesn't automatically hook up the completer, and ditto for
argument values. We also do almost no work to verify that the arguments
match their definition, or do auto-completion for them. This patch
allows you to make a command that's bug-for-bug compatible with built-in
ones, but I didn't want to stall it on getting the auto-command checking
to work all the way correctly.
As an overall design note, my primary goal here was to make an interface
that worked well in the script language. For that I needed, for
instance, to have a property-based way to get all the option values that
were specified. It was much more convenient to do that by making a
fairly bare-bones C interface to define the options and arguments of a
command, and set their values, and then wrap that in a Python class
(installed along with the other bits of the lldb python module) which
you can then derive from to make your new command. This approach will
also make it easier to experiment.
See the file test_commands.py in the test case for examples of how this
works.
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(#70392)"
Temporarily revert to unblock the CI bots, this is breaking the -DLLVM_ENABLE_MODULES=On
modules style build. I've notified Ismail.
This reverts commit 888501bc631c4f6d373b4081ff6c504a1ce4a682.
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This patch makes ScriptedThreadPlan conforming to the ScriptedInterface
& ScriptedPythonInterface facilities by introducing 2
ScriptedThreadPlanInterface & ScriptedThreadPlanPythonInterface classes.
This allows us to get rid of every ScriptedThreadPlan-specific SWIG
method and re-use the same affordances as other scripting offordances,
like Scripted{Process,Thread,Platform} & OperatingSystem.
To do so, this adds new transformer methods for `ThreadPlan`, `Stream` &
`Event`, to allow the bijection between C++ objects and their python
counterparts.
Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>
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(#70392)"
This reverts commit 4b3cd379cce3f455bf3c8677ca7a5be6e708a4ce since it
introduces some test failures:
https://lab.llvm.org/buildbot/#/builders/68/builds/62556
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This patch makes ScriptedThreadPlan conforming to the ScriptedInterface
& ScriptedPythonInterface facilities by introducing 2
ScriptedThreadPlanInterface & ScriptedThreadPlanPythonInterface classes.
This allows us to get rid of every ScriptedThreadPlan-specific SWIG
method and re-use the same affordances as other scripting offordances,
like Scripted{Process,Thread,Platform} & OperatingSystem.
To do so, this adds new transformer methods for `ThreadPlan`, `Stream` &
`Event`, to allow the bijection between C++ objects and their python
counterparts.
Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>
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This patch changes the way plugin objects used with Scripted Interfaces
are created.
Instead of implementing a different SWIG method to create the object for
every scripted interface, this patch makes the creation more generic by
re-using some of the ScriptedPythonInterface templated Dispatch code.
This patch also improves error handling of the object creation by
returning an `llvm::Expected`.
Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>
Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>
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RFC https://discourse.llvm.org/t/rfc-python-callback-for-target-get-module/71580
SBFileSpec and SBModuleSpec will be used for locate module callback as Python
function arguments. This diff allows these things.
- Can be instantiated from SBPlatform.
- Can be passed to/from Python.
- Can be accessed for object offset and size.
Differential Revision: https://reviews.llvm.org/D153733
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Many SB classes have public constructors or methods involving types that
are private. Some are more obvious (e.g. containing lldb_private in the
name) than others (lldb::FooSP is usually std::shared_pointer<lldb_private::Foo>).
This commit explicitly does not address FileSP, so I'm leaving that one
alone for now.
Some of these were for other SB classes to use and should have been made
protected/private with a friend class entry added. Some of these were
public for some of the swig python helpers to use. I put all of those
functions into a class and made them static methods. The relevant SB
classes mark that class as a friend so they can access those
private/protected members.
I've also removed an outdated SBStructuredData test (can you guess which
constructor it was using?) and updated the other relevant tests.
Differential Revision: https://reviews.llvm.org/D150157
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they are completed.
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This patch improves breakpoint management when doing interactive
scripted process debugging.
In other to know which process set a breakpoint, we need to do some book
keeping on the multiplexer scripted process. When initializing the
multiplexer, we will first copy breakpoints that are already set on the
driving target.
Everytime we launch or resume, we should copy breakpoints from the
multiplexer to the driving process.
When creating a breakpoint from a child process, it needs to be set both
on the multiplexer and on the driving process. We also tag the created
breakpoint with the name and pid of the originator process.
This patch also implements all the requirement to achieve proper
breakpoint management. That involves:
- Adding python interator for breakpoints and watchpoints in SBTarget
- Add a new `ScriptedProcess.create_breakpoint` python method
Differential Revision: https://reviews.llvm.org/D148548
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
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This patch adds memory writing capabilities to the Scripted Process plugin.
This allows to user to get a target address and a memory buffer on the
python scripted process implementation that the user can make processing
on before performing the actual write.
This will also be used to write trap instruction to a real process
memory to set a breakpoint.
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
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This patch adds process attach capabilities to the ScriptedProcess
plugin. This doesn't really expects a PID or process name, since the
process state is already script, however, this allows to create a
scripted process without requiring to have an executuble in the target.
In order to do so, this patch also turns the scripted process related
getters and setters from the `ProcessLaunchInfo` and
`ProcessAttachInfo` classes to a `ScriptedMetadata` instance and moves
it in the `ProcessInfo` class, so it can be accessed interchangeably.
This also adds the necessary SWIG wrappers to convert the internal
`Process{Attach,Launch}InfoSP` into a `SB{Attach,Launch}Info` to pass it
as argument the scripted process python implementation and convert it
back to the internal representation.
rdar://104577406
Differential Revision: https://reviews.llvm.org/D143104
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
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This patch introduces both the Scripted Platform python base
implementation and an example for it.
The base implementation is embedded in lldb python module under
`lldb.plugins.scripted_platform`.
This patch also refactor the various SWIG methods to create scripted
objects into a single method, that is now shared between the Scripted
Platform, Process and Thread. It also replaces the target argument by a
execution context object.
Differential Revision: https://reviews.llvm.org/D139250
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
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This patch replaces (llvm::|)Optional< with std::optional<. I'll post
a separate patch to clean up the "using" declarations, #include
"llvm/ADT/Optional.h", etc.
This is part of an effort to migrate from llvm::Optional to
std::optional:
https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716
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This patch adds #include <optional> to those files containing
llvm::Optional<...> or Optional<...>.
I'll post a separate patch to actually replace llvm::Optional with
std::optional.
This is part of an effort to migrate from llvm::Optional to
std::optional:
https://discourse.llvm.org/t/deprecating-llvm-optional-x-hasvalue-getvalue-getvalueor/63716
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This patch removes all occurences to GetPythonValueFormatString and
use the template specialization of PythonFormat structs instead.
Differential Revision: https://reviews.llvm.org/D134033
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
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This patch improves the ScriptedPythonInterface::Dispatch method to
support passing lldb_private types to the python implementation.
This will allow, for instance, the Scripted Process python implementation
to report errors when reading memory back to lldb.
To do so, the Dispatch method will transform the private types in the
parameter pack into `PythonObject`s to be able to pass them down to the
python methods.
Then, if the call succeeded, the transformed arguments will be converted
back to their original type and re-assigned in the parameter pack, to
ensure pointers and references behaviours are preserved.
This patch also updates various scripted process python class and tests
to reflect this change.
rdar://100030995
Differential Revision: https://reviews.llvm.org/D134033
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
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This patch adds a new matching method for data formatters, in addition
to the existing exact typename and regex-based matching. The new method
allows users to specify the name of a Python callback function that
takes a `SBType` object and decides whether the type is a match or not.
Here is an overview of the changes performed:
- Add a new `eFormatterMatchCallback` matching type, and logic to handle
it in `TypeMatcher` and `SBTypeNameSpecifier`.
- Extend `FormattersMatchCandidate` instances with a pointer to the
current `ScriptInterpreter` and the `TypeImpl` corresponding to the
candidate type, so we can run registered callbacks and pass the type
to them. All matcher search functions now receive a
`FormattersMatchCandidate` instead of a type name.
- Add some glue code to ScriptInterpreterPython and the SWIG bindings to
allow calling a formatter matching callback. Most of this code is
modeled after the equivalent code for watchpoint callback functions.
- Add an API test for the new callback-based matching feature.
For more context, please check the RFC thread where this feature was
originally discussed:
https://discourse.llvm.org/t/rfc-python-callback-for-data-formatters-type-matching/64204/11
Differential Revision: https://reviews.llvm.org/D135648
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Return our PythonObject wrappers instead of raw PyObjects (obfuscated as
void *). This ensures that ownership (reference counts) of python
objects is automatically tracked.
Differential Revision: https://reviews.llvm.org/D117462
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This starts to fix the other half of the lifetime problems in this code
-- dangling references. SB objects created on the stack will go away
when the function returns, which is a problem if the python code they
were meant for stashes a reference to them somewhere. Most of the time
this goes by unnoticed, as the code rarely has a reason to store these,
but in case it does, we shouldn't respond by crashing.
This patch fixes the management for a couple of SB objects (Debugger,
Frame, Thread). The SB objects are now created on the heap, and
their ownership is immediately passed on to SWIG, which will ensure they
are destroyed when the last python reference goes away. I will handle
the other objects in separate patches.
I include one test which demonstrates the lifetime issue for SBDebugger.
Strictly speaking, one should create a test case for each of these
objects and each of the contexts they are being used. That would require
figuring out how to persist (and later access) each of these objects.
Some of those may involve a lot of hoop-jumping (we can run python code
from within a frame-format string). I don't think that is
necessary/worth it since the new wrapper functions make it very hard to
get this wrong.
Differential Revision: https://reviews.llvm.org/D115925
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StructuredDataImpl ownership semantics is unclear at best. Various
structures were holding a non-owning pointer to it, with a comment that
the object is owned somewhere else. From what I was able to gather that
"somewhere else" was the SBStructuredData object, but I am not sure that
all created object eventually made its way there. (It wouldn't matter
even if they did, as we are leaking most of our SBStructuredData
objects.)
Since StructuredDataImpl is just a collection of two (shared) pointers,
there's really no point in elaborate lifetime management, so this patch
replaces all StructuredDataImpl pointers with actual objects or
unique_ptrs to it. This makes it much easier to resolve SBStructuredData
leaks in a follow-up patch.
Differential Revision: https://reviews.llvm.org/D114791
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The LLDBSWIGPython functions had (at least) two problems:
- There wasn't a single source of truth (a header file) for the
prototypes of these functions. This meant that subtle differences
in copies of function declarations could go by undetected. And
not-so-subtle differences would result in strange runtime failures.
- All of the declarations had to have an extern "C" interface, because
the function definitions were being placed inside and extert "C" block
generated by swig.
This patch fixes both problems by moving the function definitions to the
%header block of the swig files. This block is not surrounded by extern
"C", and seems more appropriate anyway, as swig docs say it is meant for
"user-defined support code" (whereas the previous %wrapper code was for
automatically-generated wrappers).
It also puts the declarations into the SWIGPythonBridge header file
(which seems to have been created for this purpose), and ensures it is
included by all code wishing to define or use these functions. This
means that any differences in the declaration become a compiler error
instead of a runtime failure.
Differential Revision: https://reviews.llvm.org/D114369
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This patch changes the `ScriptedThread` initializer in couple of ways:
- It replaces the `SBTarget` parameter by a `SBProcess` (pointing to the
`ScriptedProcess` that "owns" the `ScriptedThread`).
- It adds a reference to the `ScriptedProcessInfo` Dictionary, to pass
arbitrary user-input to the `ScriptedThread`.
This patch also fixes the SWIG bindings methods that call the
`ScriptedProcess` and `ScriptedThread` initializers by passing all the
arguments to the appropriate `PythonCallable` object.
Differential Revision: https://reviews.llvm.org/D112046
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
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This patch adds support for memory regions in Scripted Processes.
This is necessary to read the stack memory region in order to
reconstruct each stackframe of the program.
In order to do so, this patch makes some changes to the SBAPI, namely:
- Add a new constructor for `SBMemoryRegionInfo` that takes arguments
such as the memory region name, address range, permissions ...
This is used when reading memory at some address to compute the offset
in the binary blob provided by the user.
- Add a `GetMemoryRegionContainingAddress` method to `SBMemoryRegionInfoList`
to simplify the access to a specific memory region.
With these changes, lldb is now able to unwind the stack and reconstruct
each frame. On top of that, reloading the target module at offset 0 allows
lldb to symbolicate the `ScriptedProcess` using debug info, similarly to an
ordinary Process.
To test this, I wrote a simple program with multiple function calls, ran it in
lldb, stopped at a leaf function and read the registers values and copied
the stack memory into a binary file. These are then used in the python script.
Differential Revision: https://reviews.llvm.org/D108953
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
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This patch introduces the `ScriptedThread` class with its python
interface.
When used with `ScriptedProcess`, `ScriptedThreaad` can provide various
information such as the thread state, stop reason or even its register
context.
This can be used to reconstruct the program stack frames using lldb's unwinder.
rdar://74503836
Differential Revision: https://reviews.llvm.org/D107585
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
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diagnostics
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This patch adds a ScriptedProcess interface to the ScriptInterpreter and
more specifically, to the ScriptInterpreterPython.
This interface will be used in the C++ `ScriptProcess` Process Plugin to
call the script methods.
At the moment, not all methods are implemented, they will upstreamed in
upcoming patches.
This patch also adds helper methods to the ScriptInterpreter to
convert `SBAPI` Types (SBData & SBError) to `lldb_private` types
(DataExtractor & Status).
rdar://65508855
Differential Revision: https://reviews.llvm.org/D95711
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
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This patch reverts the following commits:
- 5a9c34918bb1526b7e8c29aa5e4fb8d8e27e27b4
- 46796762afe76496ec4dd900f64d0cf4cdc30e99
- 2cff3dec1171188ce04ab1a4373cc1885ab97be1
- 182f0d1a34419445bb19d67581d6ac1afc98b7fa
- d62a53aaf1d38a55d1affbd3a30d564a4e9d3171
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
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This patch should fi the build issue on the windows bots:
https://lab.llvm.org/buildbot/#/builders/83/builds/4214/steps/5/logs/stdio
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
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This patch adds a ScriptedProcess interface to the ScriptInterpreter and
more specifically, to the ScriptInterpreterPython.
This interface will be used in the C++ `ScriptProcess` Process Plugin to
call the script methods.
At the moment, not all methods are implemented, they will upstreamed in
upcoming patches.
This patch also adds helper methods to the ScriptInterpreter to
convert `SBAPI` Types (SBData & SBError) to `lldb_private` types
(DataExtractor & Status).
rdar://65508855
Differential Revision: https://reviews.llvm.org/D95711
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
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