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a8de6499c2
This adds a virtual method that allows `InstrumentationRuntime` sub classes to match against all modules rather than just a library that matches a particular regex. When the implementation returns true `GetPatternForRuntimeLibrary()` is ignored and all modules are iterated over. The default implementation returns false which was the previous behavior which uses `GetPatternForRuntimeLibrary()` to only match a particular runtime library. The intended use case here is for implementing an `InstrumentationRuntime` where the runtime library of interest can have multiple implementations and whose name is not known ahead of time. The concrete use case here is for a `InstrumentationRuntime` plugin for implementations of the `-fbounds-safety` soft-trap runtime which can have multiple different implementations and so the module containing the runtime functions isn't known ahead of time. This plug-in will be upstreamed as part of the process of upstreaming `-fbounds-safety`. An alternative to this would be for the `GetPatternForRuntimeLibrary()` function to return a regex that matches everything. While that technically works this new API more clearly indicates in the intent. We probably also save a little perf by not executing the regex match for every loaded module but I have not measured this. rdar://163230807
79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
//===-- InstrumentationRuntime.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/InstrumentationRuntime.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/ModuleList.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Utility/RegularExpression.h"
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#include "lldb/lldb-private.h"
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using namespace lldb;
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using namespace lldb_private;
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void InstrumentationRuntime::ModulesDidLoad(
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lldb_private::ModuleList &module_list, lldb_private::Process *process,
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InstrumentationRuntimeCollection &runtimes) {
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InstrumentationRuntimeCreateInstance create_callback = nullptr;
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InstrumentationRuntimeGetType get_type_callback;
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for (uint32_t idx = 0;; ++idx) {
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create_callback =
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PluginManager::GetInstrumentationRuntimeCreateCallbackAtIndex(idx);
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if (create_callback == nullptr)
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break;
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get_type_callback =
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PluginManager::GetInstrumentationRuntimeGetTypeCallbackAtIndex(idx);
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InstrumentationRuntimeType type = get_type_callback();
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InstrumentationRuntimeCollection::iterator pos;
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pos = runtimes.find(type);
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if (pos == runtimes.end()) {
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runtimes[type] = create_callback(process->shared_from_this());
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}
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}
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}
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void InstrumentationRuntime::ModulesDidLoad(
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lldb_private::ModuleList &module_list) {
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if (IsActive())
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return;
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if (GetRuntimeModuleSP()) {
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Activate();
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return;
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}
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module_list.ForEach([this](const lldb::ModuleSP module_sp) {
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const FileSpec &file_spec = module_sp->GetFileSpec();
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if (!file_spec)
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return IterationAction::Continue;
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const RegularExpression &runtime_regex = GetPatternForRuntimeLibrary();
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if (MatchAllModules() ||
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runtime_regex.Execute(file_spec.GetFilename().GetCString()) ||
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module_sp->IsExecutable()) {
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if (CheckIfRuntimeIsValid(module_sp)) {
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SetRuntimeModuleSP(module_sp);
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Activate();
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if (!IsActive())
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SetRuntimeModuleSP({}); // Don't cache module if activation failed.
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return IterationAction::Stop;
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}
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}
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return IterationAction::Continue;
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});
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}
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lldb::ThreadCollectionSP
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InstrumentationRuntime::GetBacktracesFromExtendedStopInfo(
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StructuredData::ObjectSP info) {
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return std::make_shared<ThreadCollection>();
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}
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