[lldb/Interpreter] Introduce ScriptedStopHook{,Python}Interface & make use of it #109498
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This patch introduces a new scripted interface for ScriptedStopHooks. This will be used in a follow-up patch to call into the script methods. Signed-off-by: Med Ismail Bennani <[email protected]>
This patch makes use of the previously defined
`ScriptedStopHook{,Python}Interface` in the `StopHookScripted` class and
removes all the SWIG methods that were implemented specifically for this.
Signed-off-by: Med Ismail Bennani <[email protected]>
Historically, some scripted extension would pass the embedded interpreter session dictionary as a argument of the extension initializer. In many cases, that argument ended up not being used but was still required for all new extension implementations. This patch relax this requirement by checking if the number of maximum positional argument is 1 argument more then the number of argument passed in the parameter pack, in which case it will pass the interpreter session dictionary with the rest of the arguments. If the implementation doesn't have it in the initializer, only the paramater pack is passed to it. Signed-off-by: Med Ismail Bennani <[email protected]>
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@llvm/pr-subscribers-lldb Author: Med Ismail Bennani (medismailben) ChangesThis patch re-lands #105449 and fixes the various test failures. Patch is 36.49 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/109498.diff 22 Files Affected:
diff --git a/lldb/bindings/python/python-swigsafecast.swig b/lldb/bindings/python/python-swigsafecast.swig
index 0127ac6bfa4681..7a4f7e81f1cc3b 100644
--- a/lldb/bindings/python/python-swigsafecast.swig
+++ b/lldb/bindings/python/python-swigsafecast.swig
@@ -33,7 +33,7 @@ PythonObject SWIGBridge::ToSWIGWrapper(lldb::BreakpointSP breakpoint_sp) {
SWIGTYPE_p_lldb__SBBreakpoint);
}
-PythonObject SWIGBridge::ToSWIGWrapper(Status status) {
+PythonObject SWIGBridge::ToSWIGWrapper(Status&& status) {
return ToSWIGHelper(new lldb::SBError(std::move(status)), SWIGTYPE_p_lldb__SBError);
}
diff --git a/lldb/bindings/python/python-wrapper.swig b/lldb/bindings/python/python-wrapper.swig
index 810673aaec5d19..961fb2d1a76178 100644
--- a/lldb/bindings/python/python-wrapper.swig
+++ b/lldb/bindings/python/python-wrapper.swig
@@ -301,104 +301,6 @@ unsigned int lldb_private::python::SWIGBridge::LLDBSwigPythonCallBreakpointResol
return ret_val;
}
-PythonObject lldb_private::python::SWIGBridge::LLDBSwigPythonCreateScriptedStopHook(
- lldb::TargetSP target_sp, const char *python_class_name,
- const char *session_dictionary_name, const StructuredDataImpl &args_impl,
- Status &error) {
- if (python_class_name == NULL || python_class_name[0] == '\0') {
- error = Status::FromErrorString("Empty class name.");
- return PythonObject();
- }
- if (!session_dictionary_name) {
- error = Status::FromErrorString("No session dictionary");
- return PythonObject();
- }
-
- PyErr_Cleaner py_err_cleaner(true);
-
- auto dict = PythonModule::MainModule().ResolveName<PythonDictionary>(
- session_dictionary_name);
- auto pfunc = PythonObject::ResolveNameWithDictionary<PythonCallable>(
- python_class_name, dict);
-
- if (!pfunc.IsAllocated()) {
- error = Status::FromErrorStringWithFormat("Could not find class: %s.",
- python_class_name);
- return PythonObject();
- }
-
- PythonObject result =
- pfunc(SWIGBridge::ToSWIGWrapper(target_sp), SWIGBridge::ToSWIGWrapper(args_impl), dict);
-
- if (result.IsAllocated()) {
- // Check that the handle_stop callback is defined:
- auto callback_func = result.ResolveName<PythonCallable>("handle_stop");
- if (callback_func.IsAllocated()) {
- if (auto args_info = callback_func.GetArgInfo()) {
- size_t num_args = (*args_info).max_positional_args;
- if (num_args != 2) {
- error = Status::FromErrorStringWithFormat(
- "Wrong number of args for "
- "handle_stop callback, should be 2 (excluding self), got: %zu",
- num_args);
- return PythonObject();
- } else
- return result;
- } else {
- error = Status::FromErrorString(
- "Couldn't get num arguments for handle_stop "
- "callback.");
- return PythonObject();
- }
- return result;
- } else {
- error = Status::FromErrorStringWithFormat(
- "Class \"%s\" is missing the required "
- "handle_stop callback.",
- python_class_name);
- }
- }
- return PythonObject();
-}
-
-bool lldb_private::python::SWIGBridge::LLDBSwigPythonStopHookCallHandleStop(
- void *implementor, lldb::ExecutionContextRefSP exc_ctx_sp,
- lldb::StreamSP stream) {
- // handle_stop will return a bool with the meaning "should_stop"...
- // If you return nothing we'll assume we are going to stop.
- // Also any errors should return true, since we should stop on error.
-
- PyErr_Cleaner py_err_cleaner(false);
- PythonObject self(PyRefType::Borrowed, static_cast<PyObject *>(implementor));
- auto pfunc = self.ResolveName<PythonCallable>("handle_stop");
-
- if (!pfunc.IsAllocated())
- return true;
-
- std::shared_ptr<lldb::SBStream> sb_stream = std::make_shared<lldb::SBStream>();
- PythonObject sb_stream_arg = SWIGBridge::ToSWIGWrapper(sb_stream);
- PythonObject result =
- pfunc(SWIGBridge::ToSWIGWrapper(std::move(exc_ctx_sp)), sb_stream_arg);
-
- if (PyErr_Occurred()) {
- stream->PutCString("Python error occurred handling stop-hook.");
- PyErr_Print();
- PyErr_Clear();
- return true;
- }
-
- // Now add the result to the output stream. SBStream only
- // makes an internally help StreamString which I can't interpose, so I
- // have to copy it over here.
- stream->PutCString(sb_stream->GetData());
- sb_stream_arg.release();
-
- if (result.get() == Py_False)
- return false;
- else
- return true;
-}
-
// wrapper that calls an optional instance member of an object taking no
// arguments
static PyObject *LLDBSwigPython_CallOptionalMember(
@@ -677,6 +579,19 @@ void *lldb_private::python::LLDBSWIGPython_CastPyObjectToSBMemoryRegionInfo(PyOb
return sb_ptr;
}
+void *lldb_private::python::LLDBSWIGPython_CastPyObjectToSBExecutionContext(PyObject *
+ data) {
+ lldb::SBExecutionContext *sb_ptr = NULL;
+
+ int valid_cast = SWIG_ConvertPtr(data, (void **)&sb_ptr,
+ SWIGTYPE_p_lldb__SBExecutionContext, 0);
+
+ if (valid_cast == -1)
+ return NULL;
+
+ return sb_ptr;
+}
+
bool lldb_private::python::SWIGBridge::LLDBSwigPythonCallCommand(
const char *python_function_name, const char *session_dictionary_name,
lldb::DebuggerSP debugger, const char *args,
diff --git a/lldb/include/lldb/API/SBExecutionContext.h b/lldb/include/lldb/API/SBExecutionContext.h
index e8de2ebe58785e..e1e08fe3f4aae4 100644
--- a/lldb/include/lldb/API/SBExecutionContext.h
+++ b/lldb/include/lldb/API/SBExecutionContext.h
@@ -16,6 +16,7 @@
#include <vector>
namespace lldb_private {
+class ScriptInterpreter;
namespace python {
class SWIGBridge;
}
@@ -55,6 +56,7 @@ class LLDB_API SBExecutionContext {
protected:
friend class lldb_private::python::SWIGBridge;
+ friend class lldb_private::ScriptInterpreter;
lldb_private::ExecutionContextRef *get() const;
diff --git a/lldb/include/lldb/Interpreter/Interfaces/ScriptedStopHookInterface.h b/lldb/include/lldb/Interpreter/Interfaces/ScriptedStopHookInterface.h
new file mode 100644
index 00000000000000..a829e62351fe85
--- /dev/null
+++ b/lldb/include/lldb/Interpreter/Interfaces/ScriptedStopHookInterface.h
@@ -0,0 +1,33 @@
+//===-- ScriptedStopHookInterface.h -----------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_INTERPRETER_INTERFACES_SCRIPTEDSTOPHOOKINTERFACE_H
+#define LLDB_INTERPRETER_INTERFACES_SCRIPTEDSTOPHOOKINTERFACE_H
+
+#include "lldb/lldb-private.h"
+
+#include "ScriptedInterface.h"
+
+namespace lldb_private {
+class ScriptedStopHookInterface : public ScriptedInterface {
+public:
+ virtual llvm::Expected<StructuredData::GenericSP>
+ CreatePluginObject(llvm::StringRef class_name, lldb::TargetSP target_sp,
+ const StructuredDataImpl &args_sp) = 0;
+
+ /// "handle_stop" will return a bool with the meaning "should_stop"...
+ /// If nothing is returned, we'll assume we are going to stop.
+ /// Also any errors should return true, since we should stop on error.
+ virtual llvm::Expected<bool> HandleStop(ExecutionContext &exe_ctx,
+ lldb::StreamSP &output_sp) {
+ return true;
+ }
+};
+} // namespace lldb_private
+
+#endif // LLDB_INTERPRETER_INTERFACES_SCRIPTEDSTOPHOOKINTERFACE_H
diff --git a/lldb/include/lldb/Interpreter/ScriptInterpreter.h b/lldb/include/lldb/Interpreter/ScriptInterpreter.h
index addb1394ab5652..901ecf3012d51d 100644
--- a/lldb/include/lldb/Interpreter/ScriptInterpreter.h
+++ b/lldb/include/lldb/Interpreter/ScriptInterpreter.h
@@ -14,6 +14,7 @@
#include "lldb/API/SBData.h"
#include "lldb/API/SBError.h"
#include "lldb/API/SBEvent.h"
+#include "lldb/API/SBExecutionContext.h"
#include "lldb/API/SBLaunchInfo.h"
#include "lldb/API/SBMemoryRegionInfo.h"
#include "lldb/API/SBStream.h"
@@ -271,24 +272,6 @@ class ScriptInterpreter : public PluginInterface {
return lldb::eSearchDepthModule;
}
- virtual StructuredData::GenericSP
- CreateScriptedStopHook(lldb::TargetSP target_sp, const char *class_name,
- const StructuredDataImpl &args_data, Status &error) {
- error =
- Status::FromErrorString("Creating scripted stop-hooks with the current "
- "script interpreter is not supported.");
- return StructuredData::GenericSP();
- }
-
- // This dispatches to the handle_stop method of the stop-hook class. It
- // returns a "should_stop" bool.
- virtual bool
- ScriptedStopHookHandleStop(StructuredData::GenericSP implementor_sp,
- ExecutionContext &exc_ctx,
- lldb::StreamSP stream_sp) {
- return true;
- }
-
virtual StructuredData::ObjectSP
LoadPluginModule(const FileSpec &file_spec, lldb_private::Status &error) {
return StructuredData::ObjectSP();
@@ -561,6 +544,10 @@ class ScriptInterpreter : public PluginInterface {
return {};
}
+ virtual lldb::ScriptedStopHookInterfaceSP CreateScriptedStopHookInterface() {
+ return {};
+ }
+
virtual StructuredData::ObjectSP
CreateStructuredDataFromScriptObject(ScriptObject obj) {
return {};
@@ -587,6 +574,9 @@ class ScriptInterpreter : public PluginInterface {
std::optional<MemoryRegionInfo> GetOpaqueTypeFromSBMemoryRegionInfo(
const lldb::SBMemoryRegionInfo &mem_region) const;
+ lldb::ExecutionContextRefSP GetOpaqueTypeFromSBExecutionContext(
+ const lldb::SBExecutionContext &exe_ctx) const;
+
protected:
Debugger &m_debugger;
lldb::ScriptLanguage m_script_lang;
diff --git a/lldb/include/lldb/Target/Target.h b/lldb/include/lldb/Target/Target.h
index 50df01aac74004..e4848f19e64d62 100644
--- a/lldb/include/lldb/Target/Target.h
+++ b/lldb/include/lldb/Target/Target.h
@@ -1391,8 +1391,7 @@ class Target : public std::enable_shared_from_this<Target>,
/// This holds the dictionary of keys & values that can be used to
/// parametrize any given callback's behavior.
StructuredDataImpl m_extra_args;
- /// This holds the python callback object.
- StructuredData::GenericSP m_implementation_sp;
+ lldb::ScriptedStopHookInterfaceSP m_interface_sp;
/// Use CreateStopHook to make a new empty stop hook. The GetCommandPointer
/// and fill it with commands, and SetSpecifier to set the specifier shared
diff --git a/lldb/include/lldb/lldb-forward.h b/lldb/include/lldb/lldb-forward.h
index 5fb288ad43af48..d09edeeccaff1a 100644
--- a/lldb/include/lldb/lldb-forward.h
+++ b/lldb/include/lldb/lldb-forward.h
@@ -190,6 +190,7 @@ class ScriptInterpreterLocker;
class ScriptedMetadata;
class ScriptedPlatformInterface;
class ScriptedProcessInterface;
+class ScriptedStopHookInterface;
class ScriptedThreadInterface;
class ScriptedThreadPlanInterface;
class ScriptedSyntheticChildren;
@@ -408,6 +409,8 @@ typedef std::unique_ptr<lldb_private::ScriptedPlatformInterface>
ScriptedPlatformInterfaceUP;
typedef std::unique_ptr<lldb_private::ScriptedProcessInterface>
ScriptedProcessInterfaceUP;
+typedef std::shared_ptr<lldb_private::ScriptedStopHookInterface>
+ ScriptedStopHookInterfaceSP;
typedef std::shared_ptr<lldb_private::ScriptedThreadInterface>
ScriptedThreadInterfaceSP;
typedef std::shared_ptr<lldb_private::ScriptedThreadPlanInterface>
diff --git a/lldb/source/Interpreter/ScriptInterpreter.cpp b/lldb/source/Interpreter/ScriptInterpreter.cpp
index 8b55221da6e761..559b8301c10106 100644
--- a/lldb/source/Interpreter/ScriptInterpreter.cpp
+++ b/lldb/source/Interpreter/ScriptInterpreter.cpp
@@ -125,6 +125,12 @@ ScriptInterpreter::GetOpaqueTypeFromSBMemoryRegionInfo(
return *mem_region.m_opaque_up.get();
}
+lldb::ExecutionContextRefSP
+ScriptInterpreter::GetOpaqueTypeFromSBExecutionContext(
+ const lldb::SBExecutionContext &exe_ctx) const {
+ return exe_ctx.m_exe_ctx_sp;
+}
+
lldb::ScriptLanguage
ScriptInterpreter::StringToLanguage(const llvm::StringRef &language) {
if (language.equals_insensitive(LanguageToString(eScriptLanguageNone)))
diff --git a/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/CMakeLists.txt b/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/CMakeLists.txt
index 6ba714ed1c263e..ee5e48ad5cdc37 100644
--- a/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/CMakeLists.txt
+++ b/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/CMakeLists.txt
@@ -25,6 +25,7 @@ add_lldb_library(lldbPluginScriptInterpreterPythonInterfaces PLUGIN
ScriptedPlatformPythonInterface.cpp
ScriptedProcessPythonInterface.cpp
ScriptedPythonInterface.cpp
+ ScriptedStopHookPythonInterface.cpp
ScriptedThreadPlanPythonInterface.cpp
ScriptedThreadPythonInterface.cpp
diff --git a/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptInterpreterPythonInterfaces.cpp b/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptInterpreterPythonInterfaces.cpp
index 38b644366080e4..1fd32993e385eb 100644
--- a/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptInterpreterPythonInterfaces.cpp
+++ b/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptInterpreterPythonInterfaces.cpp
@@ -28,6 +28,7 @@ void ScriptInterpreterPythonInterfaces::Initialize() {
OperatingSystemPythonInterface::Initialize();
ScriptedPlatformPythonInterface::Initialize();
ScriptedProcessPythonInterface::Initialize();
+ ScriptedStopHookPythonInterface::Initialize();
ScriptedThreadPlanPythonInterface::Initialize();
}
@@ -35,6 +36,7 @@ void ScriptInterpreterPythonInterfaces::Terminate() {
OperatingSystemPythonInterface::Terminate();
ScriptedPlatformPythonInterface::Terminate();
ScriptedProcessPythonInterface::Terminate();
+ ScriptedStopHookPythonInterface::Terminate();
ScriptedThreadPlanPythonInterface::Terminate();
}
diff --git a/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptInterpreterPythonInterfaces.h b/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptInterpreterPythonInterfaces.h
index 36b521480cc85c..26c80b75686918 100644
--- a/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptInterpreterPythonInterfaces.h
+++ b/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptInterpreterPythonInterfaces.h
@@ -18,6 +18,7 @@
#include "OperatingSystemPythonInterface.h"
#include "ScriptedPlatformPythonInterface.h"
#include "ScriptedProcessPythonInterface.h"
+#include "ScriptedStopHookPythonInterface.h"
#include "ScriptedThreadPlanPythonInterface.h"
namespace lldb_private {
diff --git a/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptedPythonInterface.cpp b/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptedPythonInterface.cpp
index a8e1d09da0bf12..cf11c06e8a95d4 100644
--- a/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptedPythonInterface.cpp
+++ b/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptedPythonInterface.cpp
@@ -159,4 +159,23 @@ ScriptedPythonInterface::ExtractValueFromPythonObject<
return m_interpreter.GetOpaqueTypeFromSBMemoryRegionInfo(*sb_mem_reg_info);
}
+template <>
+lldb::ExecutionContextRefSP
+ScriptedPythonInterface::ExtractValueFromPythonObject<
+ lldb::ExecutionContextRefSP>(python::PythonObject &p, Status &error) {
+
+ lldb::SBExecutionContext *sb_exe_ctx =
+ reinterpret_cast<lldb::SBExecutionContext *>(
+ python::LLDBSWIGPython_CastPyObjectToSBExecutionContext(p.get()));
+
+ if (!sb_exe_ctx) {
+ error = Status::FromErrorStringWithFormat(
+ "Couldn't cast lldb::SBExecutionContext to "
+ "lldb::ExecutionContextRefSP.");
+ return {};
+ }
+
+ return m_interpreter.GetOpaqueTypeFromSBExecutionContext(*sb_exe_ctx);
+}
+
#endif
diff --git a/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptedPythonInterface.h b/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptedPythonInterface.h
index c715295eb9ff02..4b9f463ef5605d 100644
--- a/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptedPythonInterface.h
+++ b/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptedPythonInterface.h
@@ -180,12 +180,35 @@ class ScriptedPythonInterface : virtual public ScriptedInterface {
llvm::Expected<PythonObject> expected_return_object =
create_error("Resulting object is not initialized.");
- std::apply(
- [&init, &expected_return_object](auto &&...args) {
- llvm::consumeError(expected_return_object.takeError());
- expected_return_object = init(args...);
- },
- transformed_args);
+ // This 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.
+ size_t num_args = sizeof...(Args);
+ if (num_args != arg_info->max_positional_args) {
+ if (num_args != arg_info->max_positional_args - 1)
+ return create_error("Passed arguments ({0}) doesn't match the number "
+ "of expected arguments ({1}).",
+ num_args, arg_info->max_positional_args);
+
+ std::apply(
+ [&init, &expected_return_object](auto &&...args) {
+ llvm::consumeError(expected_return_object.takeError());
+ expected_return_object = init(args...);
+ },
+ std::tuple_cat(transformed_args, std::make_tuple(dict)));
+ } else {
+ std::apply(
+ [&init, &expected_return_object](auto &&...args) {
+ llvm::consumeError(expected_return_object.takeError());
+ expected_return_object = init(args...);
+ },
+ transformed_args);
+ }
if (!expected_return_object)
return expected_return_object.takeError();
@@ -405,6 +428,10 @@ class ScriptedPythonInterface : virtual public ScriptedInterface {
return python::SWIGBridge::ToSWIGWrapper(arg);
}
+ python::PythonObject Transform(lldb::TargetSP arg) {
+ return python::SWIGBridge::ToSWIGWrapper(arg);
+ }
+
python::PythonObject Transform(lldb::ProcessSP arg) {
return python::SWIGBridge::ToSWIGWrapper(arg);
}
@@ -557,6 +584,11 @@ std::optional<MemoryRegionInfo>
ScriptedPythonInterface::ExtractValueFromPythonObject<
std::optional<MemoryRegionInfo>>(python::PythonObject &p, Status &error);
+template <>
+lldb::ExecutionContextRefSP
+ScriptedPythonInterface::ExtractValueFromPythonObject<
+ lldb::ExecutionContextRefSP>(python::PythonObject &p, Status &error);
+
} // namespace lldb_private
#endif // LLDB_ENABLE_PYTHON
diff --git a/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptedStopHookPythonInterface.cpp b/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptedStopHookPythonInterface.cpp
new file mode 100644
index 00000000000000..eb052c24bab6da
--- /dev/null
+++ b/lldb/source/Plugins/ScriptInterpreter/Python/Interfaces/ScriptedStopHookPythonInterface.cpp
@@ -0,0 +1,75 @@
+//===-- ScriptedStopHookPythonInterface.cpp -------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Host/Config.h"
+#include "lldb/Target/ExecutionContext.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/lldb-enumerations.h"
+
+#if LLDB_ENABLE_PYTHON
+
+// clang-format off
+// LLDB Python header must be included first
+#include "../lldb-python.h"
+//clang-format on
+
+#include "../SWIGPythonBridge.h"
+#include "../ScriptInterpreterPythonImpl.h"
+#include "ScriptedStopHookPythonInterface.h"
+
+using namespa...
[truncated]
|
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This patch re-lands #105449 and fixes the various test failures.