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//===-- ProcessTrace.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 "lldb/Target/ProcessTrace.h"
#include <memory>
#include "lldb/Core/Module.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/Section.h"
#include "lldb/Target/ABI.h"
#include "lldb/Target/SectionLoadList.h"
#include "lldb/Target/Target.h"
using namespace lldb;
using namespace lldb_private;
llvm::StringRef ProcessTrace::GetPluginDescriptionStatic() {
return "Trace process plug-in.";
}
void ProcessTrace::Terminate() {
PluginManager::UnregisterPlugin(ProcessTrace::CreateInstance);
}
ProcessSP ProcessTrace::CreateInstance(TargetSP target_sp,
ListenerSP listener_sp,
const FileSpec *crash_file,
bool can_connect) {
if (can_connect)
return nullptr;
return std::make_shared<ProcessTrace>(target_sp, listener_sp);
}
bool ProcessTrace::CanDebug(TargetSP target_sp, bool plugin_specified_by_name) {
return plugin_specified_by_name;
}
ProcessTrace::ProcessTrace(TargetSP target_sp, ListenerSP listener_sp)
: PostMortemProcess(target_sp, listener_sp) {}
ProcessTrace::~ProcessTrace() {
Clear();
// We need to call finalize on the process before destroying ourselves to
// make sure all of the broadcaster cleanup goes as planned. If we destruct
// this class, then Process::~Process() might have problems trying to fully
// destroy the broadcaster.
Finalize();
}
void ProcessTrace::DidAttach(ArchSpec &process_arch) {
ListenerSP listener_sp(
Listener::MakeListener("lldb.process_trace.did_attach_listener"));
HijackProcessEvents(listener_sp);
SetCanJIT(false);
StartPrivateStateThread();
SetPrivateState(eStateStopped);
EventSP event_sp;
WaitForProcessToStop(std::nullopt, &event_sp, true, listener_sp);
RestoreProcessEvents();
Process::DidAttach(process_arch);
}
bool ProcessTrace::DoUpdateThreadList(ThreadList &old_thread_list,
ThreadList &new_thread_list) {
return false;
}
void ProcessTrace::RefreshStateAfterStop() {}
Status ProcessTrace::DoDestroy() { return Status(); }
size_t ProcessTrace::ReadMemory(addr_t addr, void *buf, size_t size,
Status &error) {
if (const ABISP &abi = GetABI())
addr = abi->FixAnyAddress(addr);
// Don't allow the caching that lldb_private::Process::ReadMemory does since
// we have it all cached in the trace files.
return DoReadMemory(addr, buf, size, error);
}
void ProcessTrace::Clear() { m_thread_list.Clear(); }
void ProcessTrace::Initialize() {
static llvm::once_flag g_once_flag;
llvm::call_once(g_once_flag, []() {
PluginManager::RegisterPlugin(GetPluginNameStatic(),
GetPluginDescriptionStatic(), CreateInstance);
});
}
ArchSpec ProcessTrace::GetArchitecture() {
return GetTarget().GetArchitecture();
}
bool ProcessTrace::GetProcessInfo(ProcessInstanceInfo &info) {
info.Clear();
info.SetProcessID(GetID());
info.SetArchitecture(GetArchitecture());
ModuleSP module_sp = GetTarget().GetExecutableModule();
if (module_sp) {
const bool add_exe_file_as_first_arg = false;
info.SetExecutableFile(GetTarget().GetExecutableModule()->GetFileSpec(),
add_exe_file_as_first_arg);
}
return true;
}
size_t ProcessTrace::DoReadMemory(addr_t addr, void *buf, size_t size,
Status &error) {
Address resolved_address;
GetTarget().GetSectionLoadList().ResolveLoadAddress(addr, resolved_address);
return GetTarget().ReadMemoryFromFileCache(resolved_address, buf, size,
error);
}
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