2d704f4bf2
Partly, there's just a lot of unnecessary boiler plate. It's also possible to define combinations of arguments that make no sense (e.g. eArgRepeatPlus followed by eArgRepeatPlain...) but these are never checked since we just push_back directly into the argument definitions. This commit is step 1 of this cleanup - do the obvious stuff. In it, all the simple homogenous argument lists and the breakpoint/watchpoint ID/Range types, are set with common functions. This is an NFC change, it just centralizes boiler plate. There's no checking yet because you can't get a single argument wrong. The end goal is that all argument definition goes through functions and m_arguments is hidden so that you can't define inconsistent argument sets.
695 lines
26 KiB
C++
695 lines
26 KiB
C++
//===-- ItaniumABILanguageRuntime.cpp -------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "ItaniumABILanguageRuntime.h"
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#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
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#include "lldb/Breakpoint/BreakpointLocation.h"
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#include "lldb/Core/Mangled.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Core/ValueObject.h"
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#include "lldb/Core/ValueObjectMemory.h"
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#include "lldb/DataFormatters/FormattersHelpers.h"
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#include "lldb/Expression/DiagnosticManager.h"
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#include "lldb/Expression/FunctionCaller.h"
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#include "lldb/Interpreter/CommandObject.h"
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#include "lldb/Interpreter/CommandObjectMultiword.h"
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#include "lldb/Interpreter/CommandReturnObject.h"
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#include "lldb/Symbol/Symbol.h"
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#include "lldb/Symbol/SymbolFile.h"
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#include "lldb/Symbol/TypeList.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/RegisterContext.h"
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#include "lldb/Target/SectionLoadList.h"
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#include "lldb/Target/StopInfo.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/Thread.h"
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#include "lldb/Utility/ConstString.h"
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#include "lldb/Utility/LLDBLog.h"
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#include "lldb/Utility/Log.h"
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#include "lldb/Utility/Scalar.h"
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#include "lldb/Utility/Status.h"
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#include <vector>
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using namespace lldb;
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using namespace lldb_private;
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LLDB_PLUGIN_DEFINE_ADV(ItaniumABILanguageRuntime, CXXItaniumABI)
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static const char *vtable_demangled_prefix = "vtable for ";
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char ItaniumABILanguageRuntime::ID = 0;
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bool ItaniumABILanguageRuntime::CouldHaveDynamicValue(ValueObject &in_value) {
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const bool check_cxx = true;
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const bool check_objc = false;
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return in_value.GetCompilerType().IsPossibleDynamicType(nullptr, check_cxx,
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check_objc);
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}
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TypeAndOrName ItaniumABILanguageRuntime::GetTypeInfo(
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ValueObject &in_value, const VTableInfo &vtable_info) {
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if (vtable_info.addr.IsSectionOffset()) {
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// See if we have cached info for this type already
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TypeAndOrName type_info = GetDynamicTypeInfo(vtable_info.addr);
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if (type_info)
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return type_info;
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if (vtable_info.symbol) {
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Log *log = GetLog(LLDBLog::Object);
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llvm::StringRef symbol_name =
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vtable_info.symbol->GetMangled().GetDemangledName().GetStringRef();
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LLDB_LOGF(log,
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"0x%16.16" PRIx64
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": static-type = '%s' has vtable symbol '%s'\n",
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in_value.GetPointerValue(),
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in_value.GetTypeName().GetCString(),
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symbol_name.str().c_str());
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// We are a C++ class, that's good. Get the class name and look it
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// up:
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llvm::StringRef class_name = symbol_name;
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class_name.consume_front(vtable_demangled_prefix);
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// We know the class name is absolute, so tell FindTypes that by
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// prefixing it with the root namespace:
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std::string lookup_name("::");
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lookup_name.append(class_name.data(), class_name.size());
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type_info.SetName(class_name);
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ConstString const_lookup_name(lookup_name);
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TypeList class_types;
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ModuleSP module_sp = vtable_info.symbol->CalculateSymbolContextModule();
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// First look in the module that the vtable symbol came from and
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// look for a single exact match.
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TypeResults results;
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TypeQuery query(const_lookup_name.GetStringRef(),
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TypeQueryOptions::e_exact_match |
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TypeQueryOptions::e_find_one);
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if (module_sp) {
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module_sp->FindTypes(query, results);
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TypeSP type_sp = results.GetFirstType();
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if (type_sp)
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class_types.Insert(type_sp);
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}
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// If we didn't find a symbol, then move on to the entire module
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// list in the target and get as many unique matches as possible
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if (class_types.Empty()) {
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query.SetFindOne(false);
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m_process->GetTarget().GetImages().FindTypes(nullptr, query, results);
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for (const auto &type_sp : results.GetTypeMap().Types())
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class_types.Insert(type_sp);
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}
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lldb::TypeSP type_sp;
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if (class_types.Empty()) {
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LLDB_LOGF(log, "0x%16.16" PRIx64 ": is not dynamic\n",
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in_value.GetPointerValue());
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return TypeAndOrName();
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}
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if (class_types.GetSize() == 1) {
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type_sp = class_types.GetTypeAtIndex(0);
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if (type_sp) {
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if (TypeSystemClang::IsCXXClassType(
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type_sp->GetForwardCompilerType())) {
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LLDB_LOGF(
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log,
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"0x%16.16" PRIx64
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": static-type = '%s' has dynamic type: uid={0x%" PRIx64
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"}, type-name='%s'\n",
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in_value.GetPointerValue(), in_value.GetTypeName().AsCString(),
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type_sp->GetID(), type_sp->GetName().GetCString());
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type_info.SetTypeSP(type_sp);
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}
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}
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} else {
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size_t i;
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if (log) {
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for (i = 0; i < class_types.GetSize(); i++) {
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type_sp = class_types.GetTypeAtIndex(i);
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if (type_sp) {
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LLDB_LOGF(
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log,
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"0x%16.16" PRIx64
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": static-type = '%s' has multiple matching dynamic "
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"types: uid={0x%" PRIx64 "}, type-name='%s'\n",
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in_value.GetPointerValue(),
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in_value.GetTypeName().AsCString(),
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type_sp->GetID(), type_sp->GetName().GetCString());
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}
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}
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}
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for (i = 0; i < class_types.GetSize(); i++) {
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type_sp = class_types.GetTypeAtIndex(i);
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if (type_sp) {
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if (TypeSystemClang::IsCXXClassType(
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type_sp->GetForwardCompilerType())) {
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LLDB_LOGF(
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log,
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"0x%16.16" PRIx64 ": static-type = '%s' has multiple "
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"matching dynamic types, picking "
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"this one: uid={0x%" PRIx64 "}, type-name='%s'\n",
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in_value.GetPointerValue(),
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in_value.GetTypeName().AsCString(),
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type_sp->GetID(), type_sp->GetName().GetCString());
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type_info.SetTypeSP(type_sp);
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}
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}
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}
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if (log) {
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LLDB_LOGF(log,
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"0x%16.16" PRIx64
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": static-type = '%s' has multiple matching dynamic "
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"types, didn't find a C++ match\n",
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in_value.GetPointerValue(),
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in_value.GetTypeName().AsCString());
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}
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}
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if (type_info)
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SetDynamicTypeInfo(vtable_info.addr, type_info);
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return type_info;
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}
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}
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return TypeAndOrName();
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}
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llvm::Error ItaniumABILanguageRuntime::TypeHasVTable(CompilerType type) {
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// Check to make sure the class has a vtable.
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CompilerType original_type = type;
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if (type.IsPointerOrReferenceType()) {
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CompilerType pointee_type = type.GetPointeeType();
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if (pointee_type)
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type = pointee_type;
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}
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// Make sure this is a class or a struct first by checking the type class
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// bitfield that gets returned.
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if ((type.GetTypeClass() & (eTypeClassStruct | eTypeClassClass)) == 0) {
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return llvm::createStringError(std::errc::invalid_argument,
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"type \"%s\" is not a class or struct or a pointer to one",
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original_type.GetTypeName().AsCString("<invalid>"));
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}
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// Check if the type has virtual functions by asking it if it is polymorphic.
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if (!type.IsPolymorphicClass()) {
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return llvm::createStringError(std::errc::invalid_argument,
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"type \"%s\" doesn't have a vtable",
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type.GetTypeName().AsCString("<invalid>"));
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}
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return llvm::Error::success();
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}
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// This function can accept both pointers or references to classes as well as
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// instances of classes. If you are using this function during dynamic type
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// detection, only valid ValueObjects that return true to
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// CouldHaveDynamicValue(...) should call this function and \a check_type
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// should be set to false. This function is also used by ValueObjectVTable
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// and is can pass in instances of classes which is not suitable for dynamic
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// type detection, these cases should pass true for \a check_type.
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llvm::Expected<LanguageRuntime::VTableInfo>
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ItaniumABILanguageRuntime::GetVTableInfo(ValueObject &in_value,
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bool check_type) {
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CompilerType type = in_value.GetCompilerType();
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if (check_type) {
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if (llvm::Error err = TypeHasVTable(type))
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return std::move(err);
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}
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ExecutionContext exe_ctx(in_value.GetExecutionContextRef());
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Process *process = exe_ctx.GetProcessPtr();
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if (process == nullptr)
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return llvm::createStringError(std::errc::invalid_argument,
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"invalid process");
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AddressType address_type;
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lldb::addr_t original_ptr = LLDB_INVALID_ADDRESS;
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if (type.IsPointerOrReferenceType())
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original_ptr = in_value.GetPointerValue(&address_type);
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else
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original_ptr = in_value.GetAddressOf(/*scalar_is_load_address=*/true,
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&address_type);
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if (original_ptr == LLDB_INVALID_ADDRESS || address_type != eAddressTypeLoad)
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return llvm::createStringError(std::errc::invalid_argument,
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"failed to get the address of the value");
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Status error;
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lldb::addr_t vtable_load_addr =
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process->ReadPointerFromMemory(original_ptr, error);
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if (!error.Success() || vtable_load_addr == LLDB_INVALID_ADDRESS)
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return llvm::createStringError(std::errc::invalid_argument,
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"failed to read vtable pointer from memory at 0x%" PRIx64,
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original_ptr);
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// The vtable load address can have authentication bits with
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// AArch64 targets on Darwin.
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vtable_load_addr = process->FixDataAddress(vtable_load_addr);
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// Find the symbol that contains the "vtable_load_addr" address
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Address vtable_addr;
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if (!process->GetTarget().ResolveLoadAddress(vtable_load_addr, vtable_addr))
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return llvm::createStringError(std::errc::invalid_argument,
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"failed to resolve vtable pointer 0x%"
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PRIx64 "to a section", vtable_load_addr);
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// Check our cache first to see if we already have this info
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{
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std::lock_guard<std::mutex> locker(m_mutex);
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auto pos = m_vtable_info_map.find(vtable_addr);
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if (pos != m_vtable_info_map.end())
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return pos->second;
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}
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Symbol *symbol = vtable_addr.CalculateSymbolContextSymbol();
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if (symbol == nullptr)
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return llvm::createStringError(std::errc::invalid_argument,
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"no symbol found for 0x%" PRIx64,
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vtable_load_addr);
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llvm::StringRef name = symbol->GetMangled().GetDemangledName().GetStringRef();
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if (name.starts_with(vtable_demangled_prefix)) {
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VTableInfo info = {vtable_addr, symbol};
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std::lock_guard<std::mutex> locker(m_mutex);
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auto pos = m_vtable_info_map[vtable_addr] = info;
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return info;
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}
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return llvm::createStringError(std::errc::invalid_argument,
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"symbol found that contains 0x%" PRIx64 " is not a vtable symbol",
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vtable_load_addr);
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}
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bool ItaniumABILanguageRuntime::GetDynamicTypeAndAddress(
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ValueObject &in_value, lldb::DynamicValueType use_dynamic,
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TypeAndOrName &class_type_or_name, Address &dynamic_address,
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Value::ValueType &value_type) {
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// For Itanium, if the type has a vtable pointer in the object, it will be at
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// offset 0 in the object. That will point to the "address point" within the
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// vtable (not the beginning of the vtable.) We can then look up the symbol
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// containing this "address point" and that symbol's name demangled will
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// contain the full class name. The second pointer above the "address point"
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// is the "offset_to_top". We'll use that to get the start of the value
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// object which holds the dynamic type.
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//
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class_type_or_name.Clear();
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value_type = Value::ValueType::Scalar;
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if (!CouldHaveDynamicValue(in_value))
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return false;
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// Check if we have a vtable pointer in this value. If we don't it will
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// return an error, else it will return a valid resolved address. We don't
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// want GetVTableInfo to check the type since we accept void * as a possible
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// dynamic type and that won't pass the type check. We already checked the
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// type above in CouldHaveDynamicValue(...).
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llvm::Expected<VTableInfo> vtable_info_or_err =
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GetVTableInfo(in_value, /*check_type=*/false);
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if (!vtable_info_or_err) {
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llvm::consumeError(vtable_info_or_err.takeError());
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return false;
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}
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const VTableInfo &vtable_info = vtable_info_or_err.get();
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class_type_or_name = GetTypeInfo(in_value, vtable_info);
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if (!class_type_or_name)
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return false;
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CompilerType type = class_type_or_name.GetCompilerType();
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// There can only be one type with a given name, so we've just found
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// duplicate definitions, and this one will do as well as any other. We
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// don't consider something to have a dynamic type if it is the same as
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// the static type. So compare against the value we were handed.
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if (!type)
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return true;
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if (TypeSystemClang::AreTypesSame(in_value.GetCompilerType(), type)) {
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// The dynamic type we found was the same type, so we don't have a
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// dynamic type here...
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return false;
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}
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// The offset_to_top is two pointers above the vtable pointer.
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Target &target = m_process->GetTarget();
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const addr_t vtable_load_addr = vtable_info.addr.GetLoadAddress(&target);
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if (vtable_load_addr == LLDB_INVALID_ADDRESS)
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return false;
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const uint32_t addr_byte_size = m_process->GetAddressByteSize();
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const lldb::addr_t offset_to_top_location =
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vtable_load_addr - 2 * addr_byte_size;
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// Watch for underflow, offset_to_top_location should be less than
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// vtable_load_addr
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if (offset_to_top_location >= vtable_load_addr)
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return false;
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Status error;
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const int64_t offset_to_top = m_process->ReadSignedIntegerFromMemory(
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offset_to_top_location, addr_byte_size, INT64_MIN, error);
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if (offset_to_top == INT64_MIN)
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return false;
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// So the dynamic type is a value that starts at offset_to_top above
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// the original address.
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lldb::addr_t dynamic_addr = in_value.GetPointerValue() + offset_to_top;
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if (!m_process->GetTarget().ResolveLoadAddress(
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dynamic_addr, dynamic_address)) {
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dynamic_address.SetRawAddress(dynamic_addr);
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}
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return true;
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}
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TypeAndOrName ItaniumABILanguageRuntime::FixUpDynamicType(
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const TypeAndOrName &type_and_or_name, ValueObject &static_value) {
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CompilerType static_type(static_value.GetCompilerType());
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Flags static_type_flags(static_type.GetTypeInfo());
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TypeAndOrName ret(type_and_or_name);
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if (type_and_or_name.HasType()) {
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// The type will always be the type of the dynamic object. If our parent's
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// type was a pointer, then our type should be a pointer to the type of the
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// dynamic object. If a reference, then the original type should be
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// okay...
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CompilerType orig_type = type_and_or_name.GetCompilerType();
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CompilerType corrected_type = orig_type;
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if (static_type_flags.AllSet(eTypeIsPointer))
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corrected_type = orig_type.GetPointerType();
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else if (static_type_flags.AllSet(eTypeIsReference))
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corrected_type = orig_type.GetLValueReferenceType();
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ret.SetCompilerType(corrected_type);
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} else {
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// If we are here we need to adjust our dynamic type name to include the
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// correct & or * symbol
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std::string corrected_name(type_and_or_name.GetName().GetCString());
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if (static_type_flags.AllSet(eTypeIsPointer))
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corrected_name.append(" *");
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else if (static_type_flags.AllSet(eTypeIsReference))
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corrected_name.append(" &");
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// the parent type should be a correctly pointer'ed or referenc'ed type
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ret.SetCompilerType(static_type);
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ret.SetName(corrected_name.c_str());
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}
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return ret;
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}
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// Static Functions
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LanguageRuntime *
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ItaniumABILanguageRuntime::CreateInstance(Process *process,
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lldb::LanguageType language) {
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// FIXME: We have to check the process and make sure we actually know that
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// this process supports
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// the Itanium ABI.
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if (language == eLanguageTypeC_plus_plus ||
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language == eLanguageTypeC_plus_plus_03 ||
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language == eLanguageTypeC_plus_plus_11 ||
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language == eLanguageTypeC_plus_plus_14)
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return new ItaniumABILanguageRuntime(process);
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else
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return nullptr;
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}
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class CommandObjectMultiwordItaniumABI_Demangle : public CommandObjectParsed {
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public:
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CommandObjectMultiwordItaniumABI_Demangle(CommandInterpreter &interpreter)
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: CommandObjectParsed(
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interpreter, "demangle", "Demangle a C++ mangled name.",
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"language cplusplus demangle [<mangled-name> ...]") {
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AddSimpleArgumentList(eArgTypeSymbol, eArgRepeatPlus);
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}
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~CommandObjectMultiwordItaniumABI_Demangle() override = default;
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protected:
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void DoExecute(Args &command, CommandReturnObject &result) override {
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bool demangled_any = false;
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bool error_any = false;
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for (auto &entry : command.entries()) {
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if (entry.ref().empty())
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continue;
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// the actual Mangled class should be strict about this, but on the
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// command line if you're copying mangled names out of 'nm' on Darwin,
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// they will come out with an extra underscore - be willing to strip this
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// on behalf of the user. This is the moral equivalent of the -_/-n
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// 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;
|
|
}
|