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| //===-- LanguageRuntime.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 liblldb_LanguageRuntime_h_
#define liblldb_LanguageRuntime_h_
#include "lldb/Breakpoint/BreakpointResolver.h"
#include "lldb/Breakpoint/BreakpointResolverName.h"
#include "lldb/Core/PluginInterface.h"
#include "lldb/Core/Value.h"
#include "lldb/Core/ValueObject.h"
#include "lldb/Expression/LLVMUserExpression.h"
#include "lldb/Symbol/DeclVendor.h"
#include "lldb/Target/ExecutionContextScope.h"
#include "lldb/lldb-private.h"
#include "lldb/lldb-public.h"
#include "clang/Basic/TargetOptions.h"
namespace lldb_private {
class ExceptionSearchFilter : public SearchFilter {
public:
ExceptionSearchFilter(const lldb::TargetSP &target_sp,
lldb::LanguageType language,
bool update_module_list = true);
~ExceptionSearchFilter() override = default;
bool ModulePasses(const lldb::ModuleSP &module_sp) override;
bool ModulePasses(const FileSpec &spec) override;
void Search(Searcher &searcher) override;
void GetDescription(Stream *s) override;
static SearchFilter *
CreateFromStructuredData(Target &target,
const StructuredData::Dictionary &data_dict,
Status &error);
StructuredData::ObjectSP SerializeToStructuredData() override;
protected:
lldb::LanguageType m_language;
LanguageRuntime *m_language_runtime;
lldb::SearchFilterSP m_filter_sp;
lldb::SearchFilterSP DoCopyForBreakpoint(Breakpoint &breakpoint) override;
void UpdateModuleListIfNeeded();
};
class LanguageRuntime : public PluginInterface {
public:
~LanguageRuntime() override;
static LanguageRuntime *FindPlugin(Process *process,
lldb::LanguageType language);
static void InitializeCommands(CommandObject *parent);
virtual lldb::LanguageType GetLanguageType() const = 0;
virtual bool GetObjectDescription(Stream &str, ValueObject &object) = 0;
virtual bool GetObjectDescription(Stream &str, Value &value,
ExecutionContextScope *exe_scope) = 0;
// this call should return true if it could set the name and/or the type
virtual bool GetDynamicTypeAndAddress(ValueObject &in_value,
lldb::DynamicValueType use_dynamic,
TypeAndOrName &class_type_or_name,
Address &address,
Value::ValueType &value_type) = 0;
// This call should return a CompilerType given a generic type name and an
// ExecutionContextScope in which one can actually fetch any specialization
// information required.
virtual CompilerType GetConcreteType(ExecutionContextScope *exe_scope,
ConstString abstract_type_name) {
return CompilerType();
}
// This should be a fast test to determine whether it is likely that this
// value would have a dynamic type.
virtual bool CouldHaveDynamicValue(ValueObject &in_value) = 0;
// The contract for GetDynamicTypeAndAddress() is to return a "bare-bones"
// dynamic type For instance, given a Base* pointer,
// GetDynamicTypeAndAddress() will return the type of Derived, not Derived*.
// The job of this API is to correct this misalignment between the static
// type and the discovered dynamic type
virtual TypeAndOrName FixUpDynamicType(const TypeAndOrName &type_and_or_name,
ValueObject &static_value) = 0;
virtual void SetExceptionBreakpoints() {}
virtual void ClearExceptionBreakpoints() {}
virtual bool ExceptionBreakpointsAreSet() { return false; }
virtual bool ExceptionBreakpointsExplainStop(lldb::StopInfoSP stop_reason) {
return false;
}
static lldb::BreakpointSP
CreateExceptionBreakpoint(Target &target, lldb::LanguageType language,
bool catch_bp, bool throw_bp,
bool is_internal = false);
static lldb::BreakpointPreconditionSP
GetExceptionPrecondition(lldb::LanguageType language, bool throw_bp);
virtual lldb::ValueObjectSP GetExceptionObjectForThread(
lldb::ThreadSP thread_sp) {
return lldb::ValueObjectSP();
}
virtual lldb::ThreadSP GetBacktraceThreadFromException(
lldb::ValueObjectSP thread_sp) {
return lldb::ThreadSP();
}
Process *GetProcess() { return m_process; }
Target &GetTargetRef() { return m_process->GetTarget(); }
virtual DeclVendor *GetDeclVendor() { return nullptr; }
virtual lldb::BreakpointResolverSP
CreateExceptionResolver(Breakpoint *bkpt, bool catch_bp, bool throw_bp) = 0;
virtual lldb::SearchFilterSP CreateExceptionSearchFilter() {
return m_process->GetTarget().GetSearchFilterForModule(nullptr);
}
virtual bool GetTypeBitSize(const CompilerType &compiler_type,
uint64_t &size) {
return false;
}
virtual void SymbolsDidLoad(const ModuleList &module_list) { return; }
virtual lldb::ThreadPlanSP GetStepThroughTrampolinePlan(Thread &thread,
bool stop_others) = 0;
/// Identify whether a name is a runtime value that should not be hidden by
/// from the user interface.
virtual bool IsWhitelistedRuntimeValue(ConstString name) { return false; }
virtual llvm::Optional<CompilerType> GetRuntimeType(CompilerType base_type) {
return llvm::None;
}
virtual void ModulesDidLoad(const ModuleList &module_list) {}
// Called by the Clang expression evaluation engine to allow runtimes to
// alter the set of target options provided to the compiler. If the options
// prototype is modified, runtimes must return true, false otherwise.
virtual bool GetOverrideExprOptions(clang::TargetOptions &prototype) {
return false;
}
// Called by ClangExpressionParser::PrepareForExecution to query for any
// custom LLVM IR passes that need to be run before an expression is
// assembled and run.
virtual bool GetIRPasses(LLVMUserExpression::IRPasses &custom_passes) {
return false;
}
// Given the name of a runtime symbol (e.g. in Objective-C, an ivar offset
// symbol), try to determine from the runtime what the value of that symbol
// would be. Useful when the underlying binary is stripped.
virtual lldb::addr_t LookupRuntimeSymbol(ConstString name) {
return LLDB_INVALID_ADDRESS;
}
virtual bool isA(const void *ClassID) const { return ClassID == &ID; }
static char ID;
protected:
// Classes that inherit from LanguageRuntime can see and modify these
LanguageRuntime(Process *process);
Process *m_process;
private:
DISALLOW_COPY_AND_ASSIGN(LanguageRuntime);
};
} // namespace lldb_private
#endif // liblldb_LanguageRuntime_h_
|