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118 lines
5.4 KiB
C++
118 lines
5.4 KiB
C++
//===-- LLVMUserExpression.h ------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef liblldb_LLVMUserExpression_h
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#define liblldb_LLVMUserExpression_h
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// C Includes
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// C++ Includes
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#include <string>
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#include <map>
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#include <vector>
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// Project includes
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#include "lldb/Expression/UserExpression.h"
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namespace lldb_private
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{
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//----------------------------------------------------------------------
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/// @class LLVMUserExpression LLVMUserExpression.h "lldb/Expression/LLVMUserExpression.h"
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/// @brief Encapsulates a one-time expression for use in lldb.
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///
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/// LLDB uses expressions for various purposes, notably to call functions
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/// and as a backend for the expr command. LLVMUserExpression is a virtual base
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/// class that encapsulates the objects needed to parse and JIT an expression.
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/// The actual parsing part will be provided by the specific implementations
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/// of LLVMUserExpression - which will be vended through the appropriate TypeSystem.
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//----------------------------------------------------------------------
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class LLVMUserExpression : public UserExpression
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{
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public:
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LLVMUserExpression(ExecutionContextScope &exe_scope,
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const char *expr,
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const char *expr_prefix,
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lldb::LanguageType language,
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ResultType desired_type,
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const EvaluateExpressionOptions &options);
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~LLVMUserExpression() override;
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lldb::ExpressionResults Execute(Stream &error_stream,
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ExecutionContext &exe_ctx,
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const EvaluateExpressionOptions &options,
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lldb::UserExpressionSP &shared_ptr_to_me,
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lldb::ExpressionVariableSP &result) override;
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bool FinalizeJITExecution(Stream &error_stream,
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ExecutionContext &exe_ctx,
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lldb::ExpressionVariableSP &result,
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lldb::addr_t function_stack_bottom = LLDB_INVALID_ADDRESS,
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lldb::addr_t function_stack_top = LLDB_INVALID_ADDRESS) override;
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bool
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CanInterpret() override
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{
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return m_can_interpret;
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}
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//------------------------------------------------------------------
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/// Return the string that the parser should parse. Must be a full
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/// translation unit.
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//------------------------------------------------------------------
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const char *
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Text() override
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{
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return m_transformed_text.c_str();
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}
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lldb::ModuleSP GetJITModule() override;
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protected:
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virtual void ScanContext(ExecutionContext &exe_ctx, lldb_private::Error &err) = 0;
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bool PrepareToExecuteJITExpression(Stream &error_stream, ExecutionContext &exe_ctx, lldb::addr_t &struct_address);
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virtual bool
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AddArguments (ExecutionContext &exe_ctx,
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std::vector<lldb::addr_t> &args,
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lldb::addr_t struct_address,
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Stream &error_stream) = 0;
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lldb::addr_t m_stack_frame_bottom; ///< The bottom of the allocated stack frame.
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lldb::addr_t m_stack_frame_top; ///< The top of the allocated stack frame.
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bool m_allow_cxx; ///< True if the language allows C++.
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bool m_allow_objc; ///< True if the language allows Objective-C.
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std::string m_transformed_text; ///< The text of the expression, as send to the parser
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std::shared_ptr<IRExecutionUnit> m_execution_unit_sp; ///< The execution unit the expression is stored in.
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std::unique_ptr<Materializer> m_materializer_ap; ///< The materializer to use when running the expression.
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lldb::ModuleWP m_jit_module_wp;
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bool m_enforce_valid_object; ///< True if the expression parser should enforce the presence of a valid class pointer
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///in order to generate the expression as a method.
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bool m_in_cplusplus_method; ///< True if the expression is compiled as a C++ member function (true if it was parsed
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///when exe_ctx was in a C++ method).
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bool m_in_objectivec_method; ///< True if the expression is compiled as an Objective-C method (true if it was parsed
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///when exe_ctx was in an Objective-C method).
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bool m_in_static_method; ///< True if the expression is compiled as a static (or class) method (currently true if it
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///was parsed when exe_ctx was in an Objective-C class method).
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bool m_needs_object_ptr; ///< True if "this" or "self" must be looked up and passed in. False if the expression
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///doesn't really use them and they can be NULL.
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bool m_const_object; ///< True if "this" is const.
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Target *m_target; ///< The target for storing persistent data like types and variables.
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bool m_can_interpret; ///< True if the expression could be evaluated statically; false otherwise.
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lldb::addr_t
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m_materialized_address; ///< The address at which the arguments to the expression have been materialized.
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Materializer::DematerializerSP m_dematerializer_sp; ///< The dematerializer.
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};
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} // namespace lldb_private
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#endif
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