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0610a25a85
This is a polymorphic class, copying it is a bad idea. This was not a problem because most classes inheriting from it were deleting their copy operations themselves. However, this enables us to delete those explicit deletions, and ensure noone forgets to add them in the future.
290 lines
9.6 KiB
C++
290 lines
9.6 KiB
C++
//===-- LanguageRuntime.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 "lldb/Target/LanguageRuntime.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Core/SearchFilter.h"
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#include "lldb/Interpreter/CommandInterpreter.h"
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#include "lldb/Target/Language.h"
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#include "lldb/Target/Target.h"
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using namespace lldb;
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using namespace lldb_private;
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char LanguageRuntime::ID = 0;
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ExceptionSearchFilter::ExceptionSearchFilter(const lldb::TargetSP &target_sp,
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lldb::LanguageType language,
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bool update_module_list)
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: SearchFilter(target_sp, FilterTy::Exception), m_language(language),
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m_language_runtime(nullptr), m_filter_sp() {
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if (update_module_list)
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UpdateModuleListIfNeeded();
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}
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bool ExceptionSearchFilter::ModulePasses(const lldb::ModuleSP &module_sp) {
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UpdateModuleListIfNeeded();
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if (m_filter_sp)
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return m_filter_sp->ModulePasses(module_sp);
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return false;
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}
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bool ExceptionSearchFilter::ModulePasses(const FileSpec &spec) {
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UpdateModuleListIfNeeded();
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if (m_filter_sp)
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return m_filter_sp->ModulePasses(spec);
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return false;
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}
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void ExceptionSearchFilter::Search(Searcher &searcher) {
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UpdateModuleListIfNeeded();
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if (m_filter_sp)
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m_filter_sp->Search(searcher);
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}
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void ExceptionSearchFilter::GetDescription(Stream *s) {
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UpdateModuleListIfNeeded();
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if (m_filter_sp)
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m_filter_sp->GetDescription(s);
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}
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void ExceptionSearchFilter::UpdateModuleListIfNeeded() {
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ProcessSP process_sp(m_target_sp->GetProcessSP());
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if (process_sp) {
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bool refreash_filter = !m_filter_sp;
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if (m_language_runtime == nullptr) {
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m_language_runtime = process_sp->GetLanguageRuntime(m_language);
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refreash_filter = true;
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} else {
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LanguageRuntime *language_runtime =
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process_sp->GetLanguageRuntime(m_language);
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if (m_language_runtime != language_runtime) {
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m_language_runtime = language_runtime;
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refreash_filter = true;
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}
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}
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if (refreash_filter && m_language_runtime) {
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m_filter_sp = m_language_runtime->CreateExceptionSearchFilter();
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}
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} else {
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m_filter_sp.reset();
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m_language_runtime = nullptr;
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}
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}
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SearchFilterSP ExceptionSearchFilter::DoCreateCopy() {
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return SearchFilterSP(
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new ExceptionSearchFilter(TargetSP(), m_language, false));
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}
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SearchFilter *ExceptionSearchFilter::CreateFromStructuredData(
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Target &target, const StructuredData::Dictionary &data_dict,
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Status &error) {
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SearchFilter *result = nullptr;
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return result;
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}
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StructuredData::ObjectSP ExceptionSearchFilter::SerializeToStructuredData() {
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StructuredData::ObjectSP result_sp;
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return result_sp;
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}
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// The Target is the one that knows how to create breakpoints, so this function
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// is meant to be used either by the target or internally in
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// Set/ClearExceptionBreakpoints.
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class ExceptionBreakpointResolver : public BreakpointResolver {
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public:
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ExceptionBreakpointResolver(lldb::LanguageType language, bool catch_bp,
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bool throw_bp)
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: BreakpointResolver(nullptr, BreakpointResolver::ExceptionResolver),
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m_language(language), m_language_runtime(nullptr), m_catch_bp(catch_bp),
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m_throw_bp(throw_bp) {}
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~ExceptionBreakpointResolver() override = default;
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Searcher::CallbackReturn SearchCallback(SearchFilter &filter,
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SymbolContext &context,
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Address *addr) override {
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if (SetActualResolver())
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return m_actual_resolver_sp->SearchCallback(filter, context, addr);
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else
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return eCallbackReturnStop;
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}
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lldb::SearchDepth GetDepth() override {
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if (SetActualResolver())
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return m_actual_resolver_sp->GetDepth();
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else
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return lldb::eSearchDepthTarget;
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}
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void GetDescription(Stream *s) override {
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Language *language_plugin = Language::FindPlugin(m_language);
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if (language_plugin)
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language_plugin->GetExceptionResolverDescription(m_catch_bp, m_throw_bp,
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*s);
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else
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Language::GetDefaultExceptionResolverDescription(m_catch_bp, m_throw_bp,
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*s);
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SetActualResolver();
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if (m_actual_resolver_sp) {
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s->Printf(" using: ");
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m_actual_resolver_sp->GetDescription(s);
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} else
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s->Printf(" the correct runtime exception handler will be determined "
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"when you run");
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}
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void Dump(Stream *s) const override {}
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/// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const BreakpointResolverName *) { return true; }
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static inline bool classof(const BreakpointResolver *V) {
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return V->getResolverID() == BreakpointResolver::ExceptionResolver;
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}
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protected:
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BreakpointResolverSP CopyForBreakpoint(BreakpointSP &breakpoint) override {
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BreakpointResolverSP ret_sp(
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new ExceptionBreakpointResolver(m_language, m_catch_bp, m_throw_bp));
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ret_sp->SetBreakpoint(breakpoint);
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return ret_sp;
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}
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bool SetActualResolver() {
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BreakpointSP breakpoint_sp = GetBreakpoint();
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if (breakpoint_sp) {
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ProcessSP process_sp = breakpoint_sp->GetTarget().GetProcessSP();
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if (process_sp) {
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bool refreash_resolver = !m_actual_resolver_sp;
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if (m_language_runtime == nullptr) {
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m_language_runtime = process_sp->GetLanguageRuntime(m_language);
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refreash_resolver = true;
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} else {
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LanguageRuntime *language_runtime =
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process_sp->GetLanguageRuntime(m_language);
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if (m_language_runtime != language_runtime) {
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m_language_runtime = language_runtime;
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refreash_resolver = true;
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}
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}
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if (refreash_resolver && m_language_runtime) {
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m_actual_resolver_sp = m_language_runtime->CreateExceptionResolver(
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breakpoint_sp, m_catch_bp, m_throw_bp);
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}
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} else {
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m_actual_resolver_sp.reset();
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m_language_runtime = nullptr;
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}
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} else {
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m_actual_resolver_sp.reset();
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m_language_runtime = nullptr;
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}
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return (bool)m_actual_resolver_sp;
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}
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lldb::BreakpointResolverSP m_actual_resolver_sp;
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lldb::LanguageType m_language;
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LanguageRuntime *m_language_runtime;
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bool m_catch_bp;
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bool m_throw_bp;
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};
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LanguageRuntime *LanguageRuntime::FindPlugin(Process *process,
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lldb::LanguageType language) {
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LanguageRuntimeCreateInstance create_callback;
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for (uint32_t idx = 0;
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(create_callback =
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PluginManager::GetLanguageRuntimeCreateCallbackAtIndex(idx)) !=
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nullptr;
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++idx) {
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if (LanguageRuntime *runtime = create_callback(process, language))
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return runtime;
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}
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return nullptr;
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}
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LanguageRuntime::LanguageRuntime(Process *process) : Runtime(process) {}
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BreakpointPreconditionSP
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LanguageRuntime::GetExceptionPrecondition(LanguageType language,
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bool throw_bp) {
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LanguageRuntimeCreateInstance create_callback;
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for (uint32_t idx = 0;
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(create_callback =
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PluginManager::GetLanguageRuntimeCreateCallbackAtIndex(idx)) !=
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nullptr;
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idx++) {
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if (auto precondition_callback =
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PluginManager::GetLanguageRuntimeGetExceptionPreconditionAtIndex(
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idx)) {
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if (BreakpointPreconditionSP precond =
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precondition_callback(language, throw_bp))
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return precond;
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}
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}
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return BreakpointPreconditionSP();
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}
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BreakpointSP LanguageRuntime::CreateExceptionBreakpoint(
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Target &target, lldb::LanguageType language, bool catch_bp, bool throw_bp,
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bool is_internal) {
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BreakpointResolverSP resolver_sp(
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new ExceptionBreakpointResolver(language, catch_bp, throw_bp));
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SearchFilterSP filter_sp(
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new ExceptionSearchFilter(target.shared_from_this(), language));
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bool hardware = false;
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bool resolve_indirect_functions = false;
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BreakpointSP exc_breakpt_sp(
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target.CreateBreakpoint(filter_sp, resolver_sp, is_internal, hardware,
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resolve_indirect_functions));
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if (exc_breakpt_sp) {
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if (auto precond = GetExceptionPrecondition(language, throw_bp))
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exc_breakpt_sp->SetPrecondition(precond);
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if (is_internal)
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exc_breakpt_sp->SetBreakpointKind("exception");
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}
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return exc_breakpt_sp;
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}
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void LanguageRuntime::InitializeCommands(CommandObject *parent) {
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if (!parent)
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return;
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if (!parent->IsMultiwordObject())
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return;
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LanguageRuntimeCreateInstance create_callback;
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for (uint32_t idx = 0;
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(create_callback =
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PluginManager::GetLanguageRuntimeCreateCallbackAtIndex(idx)) !=
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nullptr;
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++idx) {
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if (LanguageRuntimeGetCommandObject command_callback =
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PluginManager::GetLanguageRuntimeGetCommandObjectAtIndex(idx)) {
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CommandObjectSP command =
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command_callback(parent->GetCommandInterpreter());
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if (command) {
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// the CommandObject vended by a Language plugin cannot be created once
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// and cached because we may create multiple debuggers and need one
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// instance of the command each - the implementing function is meant to
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// create a new instance of the command each time it is invoked.
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parent->LoadSubCommand(command->GetCommandName().str().c_str(), command);
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}
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}
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}
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}
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