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-rw-r--r--contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/CPPLanguageRuntime.cpp412
-rw-r--r--contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/CPPLanguageRuntime.h94
-rw-r--r--contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/ItaniumABI/ItaniumABILanguageRuntime.cpp694
-rw-r--r--contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/ItaniumABI/ItaniumABILanguageRuntime.h127
4 files changed, 1327 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/CPPLanguageRuntime.cpp b/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/CPPLanguageRuntime.cpp
new file mode 100644
index 000000000000..c7202a47d015
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/CPPLanguageRuntime.cpp
@@ -0,0 +1,412 @@
+//===-- CPPLanguageRuntime.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 <cstring>
+
+#include <memory>
+
+#include "CPPLanguageRuntime.h"
+
+#include "llvm/ADT/StringRef.h"
+
+#include "lldb/Symbol/Block.h"
+#include "lldb/Symbol/Variable.h"
+#include "lldb/Symbol/VariableList.h"
+
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Core/UniqueCStringMap.h"
+#include "lldb/Symbol/CompileUnit.h"
+#include "lldb/Target/ABI.h"
+#include "lldb/Target/ExecutionContext.h"
+#include "lldb/Target/RegisterContext.h"
+#include "lldb/Target/SectionLoadList.h"
+#include "lldb/Target/StackFrame.h"
+#include "lldb/Target/ThreadPlanRunToAddress.h"
+#include "lldb/Target/ThreadPlanStepInRange.h"
+#include "lldb/Utility/Timer.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+static ConstString g_this = ConstString("this");
+// Artificial coroutine-related variables emitted by clang.
+static ConstString g_promise = ConstString("__promise");
+static ConstString g_coro_frame = ConstString("__coro_frame");
+
+char CPPLanguageRuntime::ID = 0;
+
+CPPLanguageRuntime::CPPLanguageRuntime(Process *process)
+ : LanguageRuntime(process) {}
+
+bool CPPLanguageRuntime::IsAllowedRuntimeValue(ConstString name) {
+ return name == g_this || name == g_promise || name == g_coro_frame;
+}
+
+llvm::Error CPPLanguageRuntime::GetObjectDescription(Stream &str,
+ ValueObject &object) {
+ // C++ has no generic way to do this.
+ return llvm::createStringError("C++ does not support object descriptions");
+}
+
+llvm::Error
+CPPLanguageRuntime::GetObjectDescription(Stream &str, Value &value,
+ ExecutionContextScope *exe_scope) {
+ // C++ has no generic way to do this.
+ return llvm::createStringError("C++ does not support object descriptions");
+}
+
+bool contains_lambda_identifier(llvm::StringRef &str_ref) {
+ return str_ref.contains("$_") || str_ref.contains("'lambda'");
+}
+
+CPPLanguageRuntime::LibCppStdFunctionCallableInfo
+line_entry_helper(Target &target, const SymbolContext &sc, Symbol *symbol,
+ llvm::StringRef first_template_param_sref,
+ bool has_invoke) {
+
+ CPPLanguageRuntime::LibCppStdFunctionCallableInfo optional_info;
+
+ AddressRange range;
+ sc.GetAddressRange(eSymbolContextEverything, 0, false, range);
+
+ Address address = range.GetBaseAddress();
+
+ Address addr;
+ if (target.ResolveLoadAddress(address.GetCallableLoadAddress(&target),
+ addr)) {
+ LineEntry line_entry;
+ addr.CalculateSymbolContextLineEntry(line_entry);
+
+ if (contains_lambda_identifier(first_template_param_sref) || has_invoke) {
+ // Case 1 and 2
+ optional_info.callable_case = lldb_private::CPPLanguageRuntime::
+ LibCppStdFunctionCallableCase::Lambda;
+ } else {
+ // Case 3
+ optional_info.callable_case = lldb_private::CPPLanguageRuntime::
+ LibCppStdFunctionCallableCase::CallableObject;
+ }
+
+ optional_info.callable_symbol = *symbol;
+ optional_info.callable_line_entry = line_entry;
+ optional_info.callable_address = addr;
+ }
+
+ return optional_info;
+}
+
+CPPLanguageRuntime::LibCppStdFunctionCallableInfo
+CPPLanguageRuntime::FindLibCppStdFunctionCallableInfo(
+ lldb::ValueObjectSP &valobj_sp) {
+ LLDB_SCOPED_TIMER();
+
+ LibCppStdFunctionCallableInfo optional_info;
+
+ if (!valobj_sp)
+ return optional_info;
+
+ // Member __f_ has type __base*, the contents of which will hold:
+ // 1) a vtable entry which may hold type information needed to discover the
+ // lambda being called
+ // 2) possibly hold a pointer to the callable object
+ // e.g.
+ //
+ // (lldb) frame var -R f_display
+ // (std::__1::function<void (int)>) f_display = {
+ // __buf_ = {
+ // …
+ // }
+ // __f_ = 0x00007ffeefbffa00
+ // }
+ // (lldb) memory read -fA 0x00007ffeefbffa00
+ // 0x7ffeefbffa00: ... `vtable for std::__1::__function::__func<void (*) ...
+ // 0x7ffeefbffa08: ... `print_num(int) at std_function_cppreference_exam ...
+ //
+ // We will be handling five cases below, std::function is wrapping:
+ //
+ // 1) a lambda we know at compile time. We will obtain the name of the lambda
+ // from the first template pameter from __func's vtable. We will look up
+ // the lambda's operator()() and obtain the line table entry.
+ // 2) a lambda we know at runtime. A pointer to the lambdas __invoke method
+ // will be stored after the vtable. We will obtain the lambdas name from
+ // this entry and lookup operator()() and obtain the line table entry.
+ // 3) a callable object via operator()(). We will obtain the name of the
+ // object from the first template parameter from __func's vtable. We will
+ // look up the objects operator()() and obtain the line table entry.
+ // 4) a member function. A pointer to the function will stored after the
+ // we will obtain the name from this pointer.
+ // 5) a free function. A pointer to the function will stored after the vtable
+ // we will obtain the name from this pointer.
+ ValueObjectSP member_f_(valobj_sp->GetChildMemberWithName("__f_"));
+
+ if (member_f_) {
+ ValueObjectSP sub_member_f_(member_f_->GetChildMemberWithName("__f_"));
+
+ if (sub_member_f_)
+ member_f_ = sub_member_f_;
+ }
+
+ if (!member_f_)
+ return optional_info;
+
+ lldb::addr_t member_f_pointer_value = member_f_->GetValueAsUnsigned(0);
+
+ optional_info.member_f_pointer_value = member_f_pointer_value;
+
+ if (!member_f_pointer_value)
+ return optional_info;
+
+ ExecutionContext exe_ctx(valobj_sp->GetExecutionContextRef());
+ Process *process = exe_ctx.GetProcessPtr();
+
+ if (process == nullptr)
+ return optional_info;
+
+ uint32_t address_size = process->GetAddressByteSize();
+ Status status;
+
+ // First item pointed to by __f_ should be the pointer to the vtable for
+ // a __base object.
+ lldb::addr_t vtable_address =
+ process->ReadPointerFromMemory(member_f_pointer_value, status);
+
+ if (status.Fail())
+ return optional_info;
+
+ lldb::addr_t vtable_address_first_entry =
+ process->ReadPointerFromMemory(vtable_address + address_size, status);
+
+ if (status.Fail())
+ return optional_info;
+
+ lldb::addr_t address_after_vtable = member_f_pointer_value + address_size;
+ // As commented above we may not have a function pointer but if we do we will
+ // need it.
+ lldb::addr_t possible_function_address =
+ process->ReadPointerFromMemory(address_after_vtable, status);
+
+ if (status.Fail())
+ return optional_info;
+
+ Target &target = process->GetTarget();
+
+ if (target.GetSectionLoadList().IsEmpty())
+ return optional_info;
+
+ Address vtable_first_entry_resolved;
+
+ if (!target.GetSectionLoadList().ResolveLoadAddress(
+ vtable_address_first_entry, vtable_first_entry_resolved))
+ return optional_info;
+
+ Address vtable_addr_resolved;
+ SymbolContext sc;
+ Symbol *symbol = nullptr;
+
+ if (!target.GetSectionLoadList().ResolveLoadAddress(vtable_address,
+ vtable_addr_resolved))
+ return optional_info;
+
+ target.GetImages().ResolveSymbolContextForAddress(
+ vtable_addr_resolved, eSymbolContextEverything, sc);
+ symbol = sc.symbol;
+
+ if (symbol == nullptr)
+ return optional_info;
+
+ llvm::StringRef vtable_name(symbol->GetName().GetStringRef());
+ bool found_expected_start_string =
+ vtable_name.starts_with("vtable for std::__1::__function::__func<");
+
+ if (!found_expected_start_string)
+ return optional_info;
+
+ // Given case 1 or 3 we have a vtable name, we are want to extract the first
+ // template parameter
+ //
+ // ... __func<main::$_0, std::__1::allocator<main::$_0> ...
+ // ^^^^^^^^^
+ //
+ // We could see names such as:
+ // main::$_0
+ // Bar::add_num2(int)::'lambda'(int)
+ // Bar
+ //
+ // We do this by find the first < and , and extracting in between.
+ //
+ // This covers the case of the lambda known at compile time.
+ size_t first_open_angle_bracket = vtable_name.find('<') + 1;
+ size_t first_comma = vtable_name.find(',');
+
+ llvm::StringRef first_template_parameter =
+ vtable_name.slice(first_open_angle_bracket, first_comma);
+
+ Address function_address_resolved;
+
+ // Setup for cases 2, 4 and 5 we have a pointer to a function after the
+ // vtable. We will use a process of elimination to drop through each case
+ // and obtain the data we need.
+ if (target.GetSectionLoadList().ResolveLoadAddress(
+ possible_function_address, function_address_resolved)) {
+ target.GetImages().ResolveSymbolContextForAddress(
+ function_address_resolved, eSymbolContextEverything, sc);
+ symbol = sc.symbol;
+ }
+
+ // These conditions are used several times to simplify statements later on.
+ bool has_invoke =
+ (symbol ? symbol->GetName().GetStringRef().contains("__invoke") : false);
+ auto calculate_symbol_context_helper = [](auto &t,
+ SymbolContextList &sc_list) {
+ SymbolContext sc;
+ t->CalculateSymbolContext(&sc);
+ sc_list.Append(sc);
+ };
+
+ // Case 2
+ if (has_invoke) {
+ SymbolContextList scl;
+ calculate_symbol_context_helper(symbol, scl);
+
+ return line_entry_helper(target, scl[0], symbol, first_template_parameter,
+ has_invoke);
+ }
+
+ // Case 4 or 5
+ if (symbol && !symbol->GetName().GetStringRef().starts_with("vtable for") &&
+ !contains_lambda_identifier(first_template_parameter) && !has_invoke) {
+ optional_info.callable_case =
+ LibCppStdFunctionCallableCase::FreeOrMemberFunction;
+ optional_info.callable_address = function_address_resolved;
+ optional_info.callable_symbol = *symbol;
+
+ return optional_info;
+ }
+
+ std::string func_to_match = first_template_parameter.str();
+
+ auto it = CallableLookupCache.find(func_to_match);
+ if (it != CallableLookupCache.end())
+ return it->second;
+
+ SymbolContextList scl;
+
+ CompileUnit *vtable_cu =
+ vtable_first_entry_resolved.CalculateSymbolContextCompileUnit();
+ llvm::StringRef name_to_use = func_to_match;
+
+ // Case 3, we have a callable object instead of a lambda
+ //
+ // TODO
+ // We currently don't support this case a callable object may have multiple
+ // operator()() varying on const/non-const and number of arguments and we
+ // don't have a way to currently distinguish them so we will bail out now.
+ if (!contains_lambda_identifier(name_to_use))
+ return optional_info;
+
+ if (vtable_cu && !has_invoke) {
+ lldb::FunctionSP func_sp =
+ vtable_cu->FindFunction([name_to_use](const FunctionSP &f) {
+ auto name = f->GetName().GetStringRef();
+ if (name.starts_with(name_to_use) && name.contains("operator"))
+ return true;
+
+ return false;
+ });
+
+ if (func_sp) {
+ calculate_symbol_context_helper(func_sp, scl);
+ }
+ }
+
+ if (symbol == nullptr)
+ return optional_info;
+
+ // Case 1 or 3
+ if (scl.GetSize() >= 1) {
+ optional_info = line_entry_helper(target, scl[0], symbol,
+ first_template_parameter, has_invoke);
+ }
+
+ CallableLookupCache[func_to_match] = optional_info;
+
+ return optional_info;
+}
+
+lldb::ThreadPlanSP
+CPPLanguageRuntime::GetStepThroughTrampolinePlan(Thread &thread,
+ bool stop_others) {
+ ThreadPlanSP ret_plan_sp;
+
+ lldb::addr_t curr_pc = thread.GetRegisterContext()->GetPC();
+
+ TargetSP target_sp(thread.CalculateTarget());
+
+ if (target_sp->GetSectionLoadList().IsEmpty())
+ return ret_plan_sp;
+
+ Address pc_addr_resolved;
+ SymbolContext sc;
+ Symbol *symbol;
+
+ if (!target_sp->GetSectionLoadList().ResolveLoadAddress(curr_pc,
+ pc_addr_resolved))
+ return ret_plan_sp;
+
+ target_sp->GetImages().ResolveSymbolContextForAddress(
+ pc_addr_resolved, eSymbolContextEverything, sc);
+ symbol = sc.symbol;
+
+ if (symbol == nullptr)
+ return ret_plan_sp;
+
+ llvm::StringRef function_name(symbol->GetName().GetCString());
+
+ // Handling the case where we are attempting to step into std::function.
+ // The behavior will be that we will attempt to obtain the wrapped
+ // callable via FindLibCppStdFunctionCallableInfo() and if we find it we
+ // will return a ThreadPlanRunToAddress to the callable. Therefore we will
+ // step into the wrapped callable.
+ //
+ bool found_expected_start_string =
+ function_name.starts_with("std::__1::function<");
+
+ if (!found_expected_start_string)
+ return ret_plan_sp;
+
+ AddressRange range_of_curr_func;
+ sc.GetAddressRange(eSymbolContextEverything, 0, false, range_of_curr_func);
+
+ StackFrameSP frame = thread.GetStackFrameAtIndex(0);
+
+ if (frame) {
+ ValueObjectSP value_sp = frame->FindVariable(g_this);
+
+ CPPLanguageRuntime::LibCppStdFunctionCallableInfo callable_info =
+ FindLibCppStdFunctionCallableInfo(value_sp);
+
+ if (callable_info.callable_case != LibCppStdFunctionCallableCase::Invalid &&
+ value_sp->GetValueIsValid()) {
+ // We found the std::function wrapped callable and we have its address.
+ // We now create a ThreadPlan to run to the callable.
+ ret_plan_sp = std::make_shared<ThreadPlanRunToAddress>(
+ thread, callable_info.callable_address, stop_others);
+ return ret_plan_sp;
+ } else {
+ // We are in std::function but we could not obtain the callable.
+ // We create a ThreadPlan to keep stepping through using the address range
+ // of the current function.
+ ret_plan_sp = std::make_shared<ThreadPlanStepInRange>(
+ thread, range_of_curr_func, sc, nullptr, eOnlyThisThread,
+ eLazyBoolYes, eLazyBoolYes);
+ return ret_plan_sp;
+ }
+ }
+
+ return ret_plan_sp;
+}
diff --git a/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/CPPLanguageRuntime.h b/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/CPPLanguageRuntime.h
new file mode 100644
index 000000000000..57cfe2824580
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/CPPLanguageRuntime.h
@@ -0,0 +1,94 @@
+//===-- CPPLanguageRuntime.h
+//
+// 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_SOURCE_PLUGINS_LANGUAGERUNTIME_CPLUSPLUS_CPPLANGUAGERUNTIME_H
+#define LLDB_SOURCE_PLUGINS_LANGUAGERUNTIME_CPLUSPLUS_CPPLANGUAGERUNTIME_H
+
+#include <vector>
+
+#include "llvm/ADT/StringMap.h"
+
+#include "lldb/Core/PluginInterface.h"
+#include "lldb/Target/LanguageRuntime.h"
+#include "lldb/lldb-private.h"
+
+namespace lldb_private {
+
+class CPPLanguageRuntime : public LanguageRuntime {
+public:
+ enum class LibCppStdFunctionCallableCase {
+ Lambda = 0,
+ CallableObject,
+ FreeOrMemberFunction,
+ Invalid
+ };
+
+ struct LibCppStdFunctionCallableInfo {
+ Symbol callable_symbol;
+ Address callable_address;
+ LineEntry callable_line_entry;
+ lldb::addr_t member_f_pointer_value = 0u;
+ LibCppStdFunctionCallableCase callable_case =
+ LibCppStdFunctionCallableCase::Invalid;
+ };
+
+ LibCppStdFunctionCallableInfo
+ FindLibCppStdFunctionCallableInfo(lldb::ValueObjectSP &valobj_sp);
+
+ static char ID;
+
+ bool isA(const void *ClassID) const override {
+ return ClassID == &ID || LanguageRuntime::isA(ClassID);
+ }
+
+ static bool classof(const LanguageRuntime *runtime) {
+ return runtime->isA(&ID);
+ }
+
+ lldb::LanguageType GetLanguageType() const override {
+ return lldb::eLanguageTypeC_plus_plus;
+ }
+
+ static CPPLanguageRuntime *Get(Process &process) {
+ return llvm::cast_or_null<CPPLanguageRuntime>(
+ process.GetLanguageRuntime(lldb::eLanguageTypeC_plus_plus));
+ }
+
+ llvm::Error GetObjectDescription(Stream &str, ValueObject &object) override;
+
+ llvm::Error GetObjectDescription(Stream &str, Value &value,
+ ExecutionContextScope *exe_scope) override;
+
+ /// Obtain a ThreadPlan to get us into C++ constructs such as std::function.
+ ///
+ /// \param[in] thread
+ /// Current thrad of execution.
+ ///
+ /// \param[in] stop_others
+ /// True if other threads should pause during execution.
+ ///
+ /// \return
+ /// A ThreadPlan Shared pointer
+ lldb::ThreadPlanSP GetStepThroughTrampolinePlan(Thread &thread,
+ bool stop_others) override;
+
+ bool IsAllowedRuntimeValue(ConstString name) override;
+protected:
+ // Classes that inherit from CPPLanguageRuntime can see and modify these
+ CPPLanguageRuntime(Process *process);
+
+private:
+ using OperatorStringToCallableInfoMap =
+ llvm::StringMap<CPPLanguageRuntime::LibCppStdFunctionCallableInfo>;
+
+ OperatorStringToCallableInfoMap CallableLookupCache;
+};
+
+} // namespace lldb_private
+
+#endif // LLDB_SOURCE_PLUGINS_LANGUAGERUNTIME_CPLUSPLUS_CPPLANGUAGERUNTIME_H
diff --git a/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/ItaniumABI/ItaniumABILanguageRuntime.cpp b/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/ItaniumABI/ItaniumABILanguageRuntime.cpp
new file mode 100644
index 000000000000..7af768aad0bc
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/ItaniumABI/ItaniumABILanguageRuntime.cpp
@@ -0,0 +1,694 @@
+//===-- ItaniumABILanguageRuntime.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 "ItaniumABILanguageRuntime.h"
+
+#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
+#include "lldb/Breakpoint/BreakpointLocation.h"
+#include "lldb/Core/Mangled.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Core/ValueObject.h"
+#include "lldb/Core/ValueObjectMemory.h"
+#include "lldb/DataFormatters/FormattersHelpers.h"
+#include "lldb/Expression/DiagnosticManager.h"
+#include "lldb/Expression/FunctionCaller.h"
+#include "lldb/Interpreter/CommandObject.h"
+#include "lldb/Interpreter/CommandObjectMultiword.h"
+#include "lldb/Interpreter/CommandReturnObject.h"
+#include "lldb/Symbol/Symbol.h"
+#include "lldb/Symbol/SymbolFile.h"
+#include "lldb/Symbol/TypeList.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/RegisterContext.h"
+#include "lldb/Target/SectionLoadList.h"
+#include "lldb/Target/StopInfo.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/Thread.h"
+#include "lldb/Utility/ConstString.h"
+#include "lldb/Utility/LLDBLog.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/Scalar.h"
+#include "lldb/Utility/Status.h"
+
+#include <vector>
+
+using namespace lldb;
+using namespace lldb_private;
+
+LLDB_PLUGIN_DEFINE_ADV(ItaniumABILanguageRuntime, CXXItaniumABI)
+
+static const char *vtable_demangled_prefix = "vtable for ";
+
+char ItaniumABILanguageRuntime::ID = 0;
+
+bool ItaniumABILanguageRuntime::CouldHaveDynamicValue(ValueObject &in_value) {
+ const bool check_cxx = true;
+ const bool check_objc = false;
+ return in_value.GetCompilerType().IsPossibleDynamicType(nullptr, check_cxx,
+ check_objc);
+}
+
+TypeAndOrName ItaniumABILanguageRuntime::GetTypeInfo(
+ ValueObject &in_value, const VTableInfo &vtable_info) {
+ if (vtable_info.addr.IsSectionOffset()) {
+ // See if we have cached info for this type already
+ TypeAndOrName type_info = GetDynamicTypeInfo(vtable_info.addr);
+ if (type_info)
+ return type_info;
+
+ if (vtable_info.symbol) {
+ Log *log = GetLog(LLDBLog::Object);
+ llvm::StringRef symbol_name =
+ vtable_info.symbol->GetMangled().GetDemangledName().GetStringRef();
+ LLDB_LOGF(log,
+ "0x%16.16" PRIx64
+ ": static-type = '%s' has vtable symbol '%s'\n",
+ in_value.GetPointerValue(),
+ in_value.GetTypeName().GetCString(),
+ symbol_name.str().c_str());
+ // We are a C++ class, that's good. Get the class name and look it
+ // up:
+ llvm::StringRef class_name = symbol_name;
+ class_name.consume_front(vtable_demangled_prefix);
+ // We know the class name is absolute, so tell FindTypes that by
+ // prefixing it with the root namespace:
+ std::string lookup_name("::");
+ lookup_name.append(class_name.data(), class_name.size());
+
+ type_info.SetName(class_name);
+ ConstString const_lookup_name(lookup_name);
+ TypeList class_types;
+ ModuleSP module_sp = vtable_info.symbol->CalculateSymbolContextModule();
+ // First look in the module that the vtable symbol came from and
+ // look for a single exact match.
+ TypeResults results;
+ TypeQuery query(const_lookup_name.GetStringRef(),
+ TypeQueryOptions::e_exact_match |
+ TypeQueryOptions::e_find_one);
+ if (module_sp) {
+ module_sp->FindTypes(query, results);
+ TypeSP type_sp = results.GetFirstType();
+ if (type_sp)
+ class_types.Insert(type_sp);
+ }
+
+ // If we didn't find a symbol, then move on to the entire module
+ // list in the target and get as many unique matches as possible
+ if (class_types.Empty()) {
+ query.SetFindOne(false);
+ m_process->GetTarget().GetImages().FindTypes(nullptr, query, results);
+ for (const auto &type_sp : results.GetTypeMap().Types())
+ class_types.Insert(type_sp);
+ }
+
+ lldb::TypeSP type_sp;
+ if (class_types.Empty()) {
+ LLDB_LOGF(log, "0x%16.16" PRIx64 ": is not dynamic\n",
+ in_value.GetPointerValue());
+ return TypeAndOrName();
+ }
+ if (class_types.GetSize() == 1) {
+ type_sp = class_types.GetTypeAtIndex(0);
+ if (type_sp) {
+ if (TypeSystemClang::IsCXXClassType(
+ type_sp->GetForwardCompilerType())) {
+ LLDB_LOGF(
+ log,
+ "0x%16.16" PRIx64
+ ": static-type = '%s' has dynamic type: uid={0x%" PRIx64
+ "}, type-name='%s'\n",
+ in_value.GetPointerValue(), in_value.GetTypeName().AsCString(),
+ type_sp->GetID(), type_sp->GetName().GetCString());
+ type_info.SetTypeSP(type_sp);
+ }
+ }
+ } else {
+ size_t i;
+ if (log) {
+ for (i = 0; i < class_types.GetSize(); i++) {
+ type_sp = class_types.GetTypeAtIndex(i);
+ if (type_sp) {
+ LLDB_LOGF(
+ log,
+ "0x%16.16" PRIx64
+ ": static-type = '%s' has multiple matching dynamic "
+ "types: uid={0x%" PRIx64 "}, type-name='%s'\n",
+ in_value.GetPointerValue(),
+ in_value.GetTypeName().AsCString(),
+ type_sp->GetID(), type_sp->GetName().GetCString());
+ }
+ }
+ }
+
+ for (i = 0; i < class_types.GetSize(); i++) {
+ type_sp = class_types.GetTypeAtIndex(i);
+ if (type_sp) {
+ if (TypeSystemClang::IsCXXClassType(
+ type_sp->GetForwardCompilerType())) {
+ LLDB_LOGF(
+ log,
+ "0x%16.16" PRIx64 ": static-type = '%s' has multiple "
+ "matching dynamic types, picking "
+ "this one: uid={0x%" PRIx64 "}, type-name='%s'\n",
+ in_value.GetPointerValue(),
+ in_value.GetTypeName().AsCString(),
+ type_sp->GetID(), type_sp->GetName().GetCString());
+ type_info.SetTypeSP(type_sp);
+ }
+ }
+ }
+
+ if (log) {
+ LLDB_LOGF(log,
+ "0x%16.16" PRIx64
+ ": static-type = '%s' has multiple matching dynamic "
+ "types, didn't find a C++ match\n",
+ in_value.GetPointerValue(),
+ in_value.GetTypeName().AsCString());
+ }
+ }
+ if (type_info)
+ SetDynamicTypeInfo(vtable_info.addr, type_info);
+ return type_info;
+ }
+ }
+ return TypeAndOrName();
+}
+
+llvm::Error ItaniumABILanguageRuntime::TypeHasVTable(CompilerType type) {
+ // Check to make sure the class has a vtable.
+ CompilerType original_type = type;
+ if (type.IsPointerOrReferenceType()) {
+ CompilerType pointee_type = type.GetPointeeType();
+ if (pointee_type)
+ type = pointee_type;
+ }
+
+ // Make sure this is a class or a struct first by checking the type class
+ // bitfield that gets returned.
+ if ((type.GetTypeClass() & (eTypeClassStruct | eTypeClassClass)) == 0) {
+ return llvm::createStringError(std::errc::invalid_argument,
+ "type \"%s\" is not a class or struct or a pointer to one",
+ original_type.GetTypeName().AsCString("<invalid>"));
+ }
+
+ // Check if the type has virtual functions by asking it if it is polymorphic.
+ if (!type.IsPolymorphicClass()) {
+ return llvm::createStringError(std::errc::invalid_argument,
+ "type \"%s\" doesn't have a vtable",
+ type.GetTypeName().AsCString("<invalid>"));
+ }
+ return llvm::Error::success();
+}
+
+// This function can accept both pointers or references to classes as well as
+// instances of classes. If you are using this function during dynamic type
+// detection, only valid ValueObjects that return true to
+// CouldHaveDynamicValue(...) should call this function and \a check_type
+// should be set to false. This function is also used by ValueObjectVTable
+// and is can pass in instances of classes which is not suitable for dynamic
+// type detection, these cases should pass true for \a check_type.
+llvm::Expected<LanguageRuntime::VTableInfo>
+ ItaniumABILanguageRuntime::GetVTableInfo(ValueObject &in_value,
+ bool check_type) {
+
+ CompilerType type = in_value.GetCompilerType();
+ if (check_type) {
+ if (llvm::Error err = TypeHasVTable(type))
+ return std::move(err);
+ }
+ ExecutionContext exe_ctx(in_value.GetExecutionContextRef());
+ Process *process = exe_ctx.GetProcessPtr();
+ if (process == nullptr)
+ return llvm::createStringError(std::errc::invalid_argument,
+ "invalid process");
+
+ AddressType address_type;
+ lldb::addr_t original_ptr = LLDB_INVALID_ADDRESS;
+ if (type.IsPointerOrReferenceType())
+ original_ptr = in_value.GetPointerValue(&address_type);
+ else
+ original_ptr = in_value.GetAddressOf(/*scalar_is_load_address=*/true,
+ &address_type);
+ if (original_ptr == LLDB_INVALID_ADDRESS || address_type != eAddressTypeLoad)
+ return llvm::createStringError(std::errc::invalid_argument,
+ "failed to get the address of the value");
+
+ Status error;
+ lldb::addr_t vtable_load_addr =
+ process->ReadPointerFromMemory(original_ptr, error);
+
+ if (!error.Success() || vtable_load_addr == LLDB_INVALID_ADDRESS)
+ return llvm::createStringError(std::errc::invalid_argument,
+ "failed to read vtable pointer from memory at 0x%" PRIx64,
+ original_ptr);
+
+ // The vtable load address can have authentication bits with
+ // AArch64 targets on Darwin.
+ vtable_load_addr = process->FixDataAddress(vtable_load_addr);
+
+ // Find the symbol that contains the "vtable_load_addr" address
+ Address vtable_addr;
+ if (!process->GetTarget().ResolveLoadAddress(vtable_load_addr, vtable_addr))
+ return llvm::createStringError(std::errc::invalid_argument,
+ "failed to resolve vtable pointer 0x%"
+ PRIx64 "to a section", vtable_load_addr);
+
+ // Check our cache first to see if we already have this info
+ {
+ std::lock_guard<std::mutex> locker(m_mutex);
+ auto pos = m_vtable_info_map.find(vtable_addr);
+ if (pos != m_vtable_info_map.end())
+ return pos->second;
+ }
+
+ Symbol *symbol = vtable_addr.CalculateSymbolContextSymbol();
+ if (symbol == nullptr)
+ return llvm::createStringError(std::errc::invalid_argument,
+ "no symbol found for 0x%" PRIx64,
+ vtable_load_addr);
+ llvm::StringRef name = symbol->GetMangled().GetDemangledName().GetStringRef();
+ if (name.starts_with(vtable_demangled_prefix)) {
+ VTableInfo info = {vtable_addr, symbol};
+ std::lock_guard<std::mutex> locker(m_mutex);
+ auto pos = m_vtable_info_map[vtable_addr] = info;
+ return info;
+ }
+ return llvm::createStringError(std::errc::invalid_argument,
+ "symbol found that contains 0x%" PRIx64 " is not a vtable symbol",
+ vtable_load_addr);
+}
+
+bool ItaniumABILanguageRuntime::GetDynamicTypeAndAddress(
+ ValueObject &in_value, lldb::DynamicValueType use_dynamic,
+ TypeAndOrName &class_type_or_name, Address &dynamic_address,
+ Value::ValueType &value_type) {
+ // For Itanium, if the type has a vtable pointer in the object, it will be at
+ // offset 0 in the object. That will point to the "address point" within the
+ // vtable (not the beginning of the vtable.) We can then look up the symbol
+ // containing this "address point" and that symbol's name demangled will
+ // contain the full class name. The second pointer above the "address point"
+ // is the "offset_to_top". We'll use that to get the start of the value
+ // object which holds the dynamic type.
+ //
+
+ class_type_or_name.Clear();
+ value_type = Value::ValueType::Scalar;
+
+ if (!CouldHaveDynamicValue(in_value))
+ return false;
+
+ // Check if we have a vtable pointer in this value. If we don't it will
+ // return an error, else it will return a valid resolved address. We don't
+ // want GetVTableInfo to check the type since we accept void * as a possible
+ // dynamic type and that won't pass the type check. We already checked the
+ // type above in CouldHaveDynamicValue(...).
+ llvm::Expected<VTableInfo> vtable_info_or_err =
+ GetVTableInfo(in_value, /*check_type=*/false);
+ if (!vtable_info_or_err) {
+ llvm::consumeError(vtable_info_or_err.takeError());
+ return false;
+ }
+
+ const VTableInfo &vtable_info = vtable_info_or_err.get();
+ class_type_or_name = GetTypeInfo(in_value, vtable_info);
+
+ if (!class_type_or_name)
+ return false;
+
+ CompilerType type = class_type_or_name.GetCompilerType();
+ // There can only be one type with a given name, so we've just found
+ // duplicate definitions, and this one will do as well as any other. We
+ // don't consider something to have a dynamic type if it is the same as
+ // the static type. So compare against the value we were handed.
+ if (!type)
+ return true;
+
+ if (TypeSystemClang::AreTypesSame(in_value.GetCompilerType(), type)) {
+ // The dynamic type we found was the same type, so we don't have a
+ // dynamic type here...
+ return false;
+ }
+
+ // The offset_to_top is two pointers above the vtable pointer.
+ Target &target = m_process->GetTarget();
+ const addr_t vtable_load_addr = vtable_info.addr.GetLoadAddress(&target);
+ if (vtable_load_addr == LLDB_INVALID_ADDRESS)
+ return false;
+ const uint32_t addr_byte_size = m_process->GetAddressByteSize();
+ const lldb::addr_t offset_to_top_location =
+ vtable_load_addr - 2 * addr_byte_size;
+ // Watch for underflow, offset_to_top_location should be less than
+ // vtable_load_addr
+ if (offset_to_top_location >= vtable_load_addr)
+ return false;
+ Status error;
+ const int64_t offset_to_top = m_process->ReadSignedIntegerFromMemory(
+ offset_to_top_location, addr_byte_size, INT64_MIN, error);
+
+ if (offset_to_top == INT64_MIN)
+ return false;
+ // So the dynamic type is a value that starts at offset_to_top above
+ // the original address.
+ lldb::addr_t dynamic_addr = in_value.GetPointerValue() + offset_to_top;
+ if (!m_process->GetTarget().ResolveLoadAddress(
+ dynamic_addr, dynamic_address)) {
+ dynamic_address.SetRawAddress(dynamic_addr);
+ }
+ return true;
+}
+
+TypeAndOrName ItaniumABILanguageRuntime::FixUpDynamicType(
+ const TypeAndOrName &type_and_or_name, ValueObject &static_value) {
+ CompilerType static_type(static_value.GetCompilerType());
+ Flags static_type_flags(static_type.GetTypeInfo());
+
+ TypeAndOrName ret(type_and_or_name);
+ if (type_and_or_name.HasType()) {
+ // The type will always be the type of the dynamic object. If our parent's
+ // type was a pointer, then our type should be a pointer to the type of the
+ // dynamic object. If a reference, then the original type should be
+ // okay...
+ CompilerType orig_type = type_and_or_name.GetCompilerType();
+ CompilerType corrected_type = orig_type;
+ if (static_type_flags.AllSet(eTypeIsPointer))
+ corrected_type = orig_type.GetPointerType();
+ else if (static_type_flags.AllSet(eTypeIsReference))
+ corrected_type = orig_type.GetLValueReferenceType();
+ ret.SetCompilerType(corrected_type);
+ } else {
+ // If we are here we need to adjust our dynamic type name to include the
+ // correct & or * symbol
+ std::string corrected_name(type_and_or_name.GetName().GetCString());
+ if (static_type_flags.AllSet(eTypeIsPointer))
+ corrected_name.append(" *");
+ else if (static_type_flags.AllSet(eTypeIsReference))
+ corrected_name.append(" &");
+ // the parent type should be a correctly pointer'ed or referenc'ed type
+ ret.SetCompilerType(static_type);
+ ret.SetName(corrected_name.c_str());
+ }
+ return ret;
+}
+
+// Static Functions
+LanguageRuntime *
+ItaniumABILanguageRuntime::CreateInstance(Process *process,
+ lldb::LanguageType language) {
+ // FIXME: We have to check the process and make sure we actually know that
+ // this process supports
+ // the Itanium ABI.
+ if (language == eLanguageTypeC_plus_plus ||
+ language == eLanguageTypeC_plus_plus_03 ||
+ language == eLanguageTypeC_plus_plus_11 ||
+ language == eLanguageTypeC_plus_plus_14)
+ return new ItaniumABILanguageRuntime(process);
+ else
+ return nullptr;
+}
+
+class CommandObjectMultiwordItaniumABI_Demangle : public CommandObjectParsed {
+public:
+ CommandObjectMultiwordItaniumABI_Demangle(CommandInterpreter &interpreter)
+ : CommandObjectParsed(
+ interpreter, "demangle", "Demangle a C++ mangled name.",
+ "language cplusplus demangle [<mangled-name> ...]") {
+ AddSimpleArgumentList(eArgTypeSymbol, eArgRepeatPlus);
+ }
+
+ ~CommandObjectMultiwordItaniumABI_Demangle() override = default;
+
+protected:
+ void DoExecute(Args &command, CommandReturnObject &result) override {
+ bool demangled_any = false;
+ bool error_any = false;
+ for (auto &entry : command.entries()) {
+ if (entry.ref().empty())
+ continue;
+
+ // the actual Mangled class should be strict about this, but on the
+ // command line if you're copying mangled names out of 'nm' on Darwin,
+ // they will come out with an extra underscore - be willing to strip this
+ // on behalf of the user. This is the moral equivalent of the -_/-n
+ // options to c++filt
+ auto name = entry.ref();
+ if (name.starts_with("__Z"))
+ name = name.drop_front();
+
+ Mangled mangled(name);
+ if (mangled.GuessLanguage() == lldb::eLanguageTypeC_plus_plus) {
+ ConstString demangled(mangled.GetDisplayDemangledName());
+ demangled_any = true;
+ result.AppendMessageWithFormat("%s ---> %s\n", entry.c_str(),
+ demangled.GetCString());
+ } else {
+ error_any = true;
+ result.AppendErrorWithFormat("%s is not a valid C++ mangled name\n",
+ entry.ref().str().c_str());
+ }
+ }
+
+ result.SetStatus(
+ error_any ? lldb::eReturnStatusFailed
+ : (demangled_any ? lldb::eReturnStatusSuccessFinishResult
+ : lldb::eReturnStatusSuccessFinishNoResult));
+ }
+};
+
+class CommandObjectMultiwordItaniumABI : public CommandObjectMultiword {
+public:
+ CommandObjectMultiwordItaniumABI(CommandInterpreter &interpreter)
+ : CommandObjectMultiword(
+ interpreter, "cplusplus",
+ "Commands for operating on the C++ language runtime.",
+ "cplusplus <subcommand> [<subcommand-options>]") {
+ LoadSubCommand(
+ "demangle",
+ CommandObjectSP(
+ new CommandObjectMultiwordItaniumABI_Demangle(interpreter)));
+ }
+
+ ~CommandObjectMultiwordItaniumABI() override = default;
+};
+
+void ItaniumABILanguageRuntime::Initialize() {
+ PluginManager::RegisterPlugin(
+ GetPluginNameStatic(), "Itanium ABI for the C++ language", CreateInstance,
+ [](CommandInterpreter &interpreter) -> lldb::CommandObjectSP {
+ return CommandObjectSP(
+ new CommandObjectMultiwordItaniumABI(interpreter));
+ });
+}
+
+void ItaniumABILanguageRuntime::Terminate() {
+ PluginManager::UnregisterPlugin(CreateInstance);
+}
+
+BreakpointResolverSP ItaniumABILanguageRuntime::CreateExceptionResolver(
+ const BreakpointSP &bkpt, bool catch_bp, bool throw_bp) {
+ return CreateExceptionResolver(bkpt, catch_bp, throw_bp, false);
+}
+
+BreakpointResolverSP ItaniumABILanguageRuntime::CreateExceptionResolver(
+ const BreakpointSP &bkpt, bool catch_bp, bool throw_bp,
+ bool for_expressions) {
+ // One complication here is that most users DON'T want to stop at
+ // __cxa_allocate_expression, but until we can do anything better with
+ // predicting unwinding the expression parser does. So we have two forms of
+ // the exception breakpoints, one for expressions that leaves out
+ // __cxa_allocate_exception, and one that includes it. The
+ // SetExceptionBreakpoints does the latter, the CreateExceptionBreakpoint in
+ // the runtime the former.
+ static const char *g_catch_name = "__cxa_begin_catch";
+ static const char *g_throw_name1 = "__cxa_throw";
+ static const char *g_throw_name2 = "__cxa_rethrow";
+ static const char *g_exception_throw_name = "__cxa_allocate_exception";
+ std::vector<const char *> exception_names;
+ exception_names.reserve(4);
+ if (catch_bp)
+ exception_names.push_back(g_catch_name);
+
+ if (throw_bp) {
+ exception_names.push_back(g_throw_name1);
+ exception_names.push_back(g_throw_name2);
+ }
+
+ if (for_expressions)
+ exception_names.push_back(g_exception_throw_name);
+
+ BreakpointResolverSP resolver_sp(new BreakpointResolverName(
+ bkpt, exception_names.data(), exception_names.size(),
+ eFunctionNameTypeBase, eLanguageTypeUnknown, 0, eLazyBoolNo));
+
+ return resolver_sp;
+}
+
+lldb::SearchFilterSP ItaniumABILanguageRuntime::CreateExceptionSearchFilter() {
+ Target &target = m_process->GetTarget();
+
+ FileSpecList filter_modules;
+ if (target.GetArchitecture().GetTriple().getVendor() == llvm::Triple::Apple) {
+ // Limit the number of modules that are searched for these breakpoints for
+ // Apple binaries.
+ filter_modules.EmplaceBack("libc++abi.dylib");
+ filter_modules.EmplaceBack("libSystem.B.dylib");
+ filter_modules.EmplaceBack("libc++abi.1.0.dylib");
+ filter_modules.EmplaceBack("libc++abi.1.dylib");
+ }
+ return target.GetSearchFilterForModuleList(&filter_modules);
+}
+
+lldb::BreakpointSP ItaniumABILanguageRuntime::CreateExceptionBreakpoint(
+ bool catch_bp, bool throw_bp, bool for_expressions, bool is_internal) {
+ Target &target = m_process->GetTarget();
+ FileSpecList filter_modules;
+ BreakpointResolverSP exception_resolver_sp =
+ CreateExceptionResolver(nullptr, catch_bp, throw_bp, for_expressions);
+ SearchFilterSP filter_sp(CreateExceptionSearchFilter());
+ const bool hardware = false;
+ const bool resolve_indirect_functions = false;
+ return target.CreateBreakpoint(filter_sp, exception_resolver_sp, is_internal,
+ hardware, resolve_indirect_functions);
+}
+
+void ItaniumABILanguageRuntime::SetExceptionBreakpoints() {
+ if (!m_process)
+ return;
+
+ const bool catch_bp = false;
+ const bool throw_bp = true;
+ const bool is_internal = true;
+ const bool for_expressions = true;
+
+ // For the exception breakpoints set by the Expression parser, we'll be a
+ // little more aggressive and stop at exception allocation as well.
+
+ if (m_cxx_exception_bp_sp) {
+ m_cxx_exception_bp_sp->SetEnabled(true);
+ } else {
+ m_cxx_exception_bp_sp = CreateExceptionBreakpoint(
+ catch_bp, throw_bp, for_expressions, is_internal);
+ if (m_cxx_exception_bp_sp)
+ m_cxx_exception_bp_sp->SetBreakpointKind("c++ exception");
+ }
+}
+
+void ItaniumABILanguageRuntime::ClearExceptionBreakpoints() {
+ if (!m_process)
+ return;
+
+ if (m_cxx_exception_bp_sp) {
+ m_cxx_exception_bp_sp->SetEnabled(false);
+ }
+}
+
+bool ItaniumABILanguageRuntime::ExceptionBreakpointsAreSet() {
+ return m_cxx_exception_bp_sp && m_cxx_exception_bp_sp->IsEnabled();
+}
+
+bool ItaniumABILanguageRuntime::ExceptionBreakpointsExplainStop(
+ lldb::StopInfoSP stop_reason) {
+ if (!m_process)
+ return false;
+
+ if (!stop_reason || stop_reason->GetStopReason() != eStopReasonBreakpoint)
+ return false;
+
+ uint64_t break_site_id = stop_reason->GetValue();
+ return m_process->GetBreakpointSiteList().StopPointSiteContainsBreakpoint(
+ break_site_id, m_cxx_exception_bp_sp->GetID());
+}
+
+ValueObjectSP ItaniumABILanguageRuntime::GetExceptionObjectForThread(
+ ThreadSP thread_sp) {
+ if (!thread_sp->SafeToCallFunctions())
+ return {};
+
+ TypeSystemClangSP scratch_ts_sp =
+ ScratchTypeSystemClang::GetForTarget(m_process->GetTarget());
+ if (!scratch_ts_sp)
+ return {};
+
+ CompilerType voidstar =
+ scratch_ts_sp->GetBasicType(eBasicTypeVoid).GetPointerType();
+
+ DiagnosticManager diagnostics;
+ ExecutionContext exe_ctx;
+ EvaluateExpressionOptions options;
+
+ options.SetUnwindOnError(true);
+ options.SetIgnoreBreakpoints(true);
+ options.SetStopOthers(true);
+ options.SetTimeout(m_process->GetUtilityExpressionTimeout());
+ options.SetTryAllThreads(false);
+ thread_sp->CalculateExecutionContext(exe_ctx);
+
+ const ModuleList &modules = m_process->GetTarget().GetImages();
+ SymbolContextList contexts;
+ SymbolContext context;
+
+ modules.FindSymbolsWithNameAndType(
+ ConstString("__cxa_current_exception_type"), eSymbolTypeCode, contexts);
+ contexts.GetContextAtIndex(0, context);
+ if (!context.symbol) {
+ return {};
+ }
+ Address addr = context.symbol->GetAddress();
+
+ Status error;
+ FunctionCaller *function_caller =
+ m_process->GetTarget().GetFunctionCallerForLanguage(
+ eLanguageTypeC, voidstar, addr, ValueList(), "caller", error);
+
+ ExpressionResults func_call_ret;
+ Value results;
+ func_call_ret = function_caller->ExecuteFunction(exe_ctx, nullptr, options,
+ diagnostics, results);
+ if (func_call_ret != eExpressionCompleted || !error.Success()) {
+ return ValueObjectSP();
+ }
+
+ size_t ptr_size = m_process->GetAddressByteSize();
+ addr_t result_ptr = results.GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
+ addr_t exception_addr =
+ m_process->ReadPointerFromMemory(result_ptr - ptr_size, error);
+
+ if (!error.Success()) {
+ return ValueObjectSP();
+ }
+
+ lldb_private::formatters::InferiorSizedWord exception_isw(exception_addr,
+ *m_process);
+ ValueObjectSP exception = ValueObject::CreateValueObjectFromData(
+ "exception", exception_isw.GetAsData(m_process->GetByteOrder()), exe_ctx,
+ voidstar);
+ ValueObjectSP dyn_exception
+ = exception->GetDynamicValue(eDynamicDontRunTarget);
+ // If we succeed in making a dynamic value, return that:
+ if (dyn_exception)
+ return dyn_exception;
+
+ return exception;
+}
+
+TypeAndOrName ItaniumABILanguageRuntime::GetDynamicTypeInfo(
+ const lldb_private::Address &vtable_addr) {
+ std::lock_guard<std::mutex> locker(m_mutex);
+ DynamicTypeCache::const_iterator pos = m_dynamic_type_map.find(vtable_addr);
+ if (pos == m_dynamic_type_map.end())
+ return TypeAndOrName();
+ else
+ return pos->second;
+}
+
+void ItaniumABILanguageRuntime::SetDynamicTypeInfo(
+ const lldb_private::Address &vtable_addr, const TypeAndOrName &type_info) {
+ std::lock_guard<std::mutex> locker(m_mutex);
+ m_dynamic_type_map[vtable_addr] = type_info;
+}
diff --git a/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/ItaniumABI/ItaniumABILanguageRuntime.h b/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/ItaniumABI/ItaniumABILanguageRuntime.h
new file mode 100644
index 000000000000..0f7e73cfee07
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Plugins/LanguageRuntime/CPlusPlus/ItaniumABI/ItaniumABILanguageRuntime.h
@@ -0,0 +1,127 @@
+//===-- ItaniumABILanguageRuntime.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_SOURCE_PLUGINS_LANGUAGERUNTIME_CPLUSPLUS_ITANIUMABI_ITANIUMABILANGUAGERUNTIME_H
+#define LLDB_SOURCE_PLUGINS_LANGUAGERUNTIME_CPLUSPLUS_ITANIUMABI_ITANIUMABILANGUAGERUNTIME_H
+
+#include <map>
+#include <mutex>
+#include <vector>
+
+#include "lldb/Breakpoint/BreakpointResolver.h"
+#include "lldb/Core/Value.h"
+#include "lldb/Symbol/Type.h"
+#include "lldb/Target/LanguageRuntime.h"
+#include "lldb/lldb-private.h"
+
+#include "Plugins/LanguageRuntime/CPlusPlus/CPPLanguageRuntime.h"
+
+namespace lldb_private {
+
+class ItaniumABILanguageRuntime : public lldb_private::CPPLanguageRuntime {
+public:
+ ~ItaniumABILanguageRuntime() override = default;
+
+ // Static Functions
+ static void Initialize();
+
+ static void Terminate();
+
+ static lldb_private::LanguageRuntime *
+ CreateInstance(Process *process, lldb::LanguageType language);
+
+ static llvm::StringRef GetPluginNameStatic() { return "itanium"; }
+
+ static char ID;
+
+ bool isA(const void *ClassID) const override {
+ return ClassID == &ID || CPPLanguageRuntime::isA(ClassID);
+ }
+
+ static bool classof(const LanguageRuntime *runtime) {
+ return runtime->isA(&ID);
+ }
+
+
+ llvm::Expected<LanguageRuntime::VTableInfo>
+ GetVTableInfo(ValueObject &in_value, bool check_type) override;
+
+ bool GetDynamicTypeAndAddress(ValueObject &in_value,
+ lldb::DynamicValueType use_dynamic,
+ TypeAndOrName &class_type_or_name,
+ Address &address,
+ Value::ValueType &value_type) override;
+
+ TypeAndOrName FixUpDynamicType(const TypeAndOrName &type_and_or_name,
+ ValueObject &static_value) override;
+
+ bool CouldHaveDynamicValue(ValueObject &in_value) override;
+
+ void SetExceptionBreakpoints() override;
+
+ void ClearExceptionBreakpoints() override;
+
+ bool ExceptionBreakpointsAreSet() override;
+
+ bool ExceptionBreakpointsExplainStop(lldb::StopInfoSP stop_reason) override;
+
+ lldb::BreakpointResolverSP
+ CreateExceptionResolver(const lldb::BreakpointSP &bkpt,
+ bool catch_bp, bool throw_bp) override;
+
+ lldb::SearchFilterSP CreateExceptionSearchFilter() override;
+
+ lldb::ValueObjectSP GetExceptionObjectForThread(
+ lldb::ThreadSP thread_sp) override;
+
+ // PluginInterface protocol
+ llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
+
+protected:
+ lldb::BreakpointResolverSP
+ CreateExceptionResolver(const lldb::BreakpointSP &bkpt,
+ bool catch_bp, bool throw_bp, bool for_expressions);
+
+ lldb::BreakpointSP CreateExceptionBreakpoint(bool catch_bp, bool throw_bp,
+ bool for_expressions,
+ bool is_internal);
+
+private:
+ typedef std::map<lldb_private::Address, TypeAndOrName> DynamicTypeCache;
+ typedef std::map<lldb_private::Address, VTableInfo> VTableInfoCache;
+
+ ItaniumABILanguageRuntime(Process *process)
+ : // Call CreateInstance instead.
+ lldb_private::CPPLanguageRuntime(process) {}
+
+ lldb::BreakpointSP m_cxx_exception_bp_sp;
+ DynamicTypeCache m_dynamic_type_map;
+ VTableInfoCache m_vtable_info_map;
+ std::mutex m_mutex;
+
+ TypeAndOrName GetTypeInfo(ValueObject &in_value,
+ const VTableInfo &vtable_info);
+
+ TypeAndOrName GetDynamicTypeInfo(const lldb_private::Address &vtable_addr);
+
+ void SetDynamicTypeInfo(const lldb_private::Address &vtable_addr,
+ const TypeAndOrName &type_info);
+
+ // Check if a compiler type has a vtable.
+ //
+ // If the compiler type is a pointer or a reference, this function will check
+ // if the pointee type has a vtable, else it will check the type passed in.
+ //
+ // Returns an error if the type of the value doesn't have a vtable with an
+ // explanation why, or returns an Error::success() if the type has a vtable.
+ llvm::Error TypeHasVTable(CompilerType compiler_type);
+};
+
+} // namespace lldb_private
+
+#endif // LLDB_SOURCE_PLUGINS_LANGUAGERUNTIME_CPLUSPLUS_ITANIUMABI_ITANIUMABILANGUAGERUNTIME_H