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//===-- DecodedThread.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 "DecodedThread.h"
#include <intel-pt.h>
#include <memory>
#include "TraceCursorIntelPT.h"
#include "lldb/Utility/StreamString.h"
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::trace_intel_pt;
using namespace llvm;
char IntelPTError::ID;
IntelPTError::IntelPTError(int libipt_error_code, lldb::addr_t address)
: m_libipt_error_code(libipt_error_code), m_address(address) {
assert(libipt_error_code < 0);
}
void IntelPTError::log(llvm::raw_ostream &OS) const {
const char *libipt_error_message = pt_errstr(pt_errcode(m_libipt_error_code));
if (m_address != LLDB_INVALID_ADDRESS && m_address > 0) {
write_hex(OS, m_address, HexPrintStyle::PrefixLower, 18);
OS << " ";
}
OS << "error: " << libipt_error_message;
}
IntelPTInstruction::IntelPTInstruction(llvm::Error err) {
llvm::handleAllErrors(std::move(err),
[&](std::unique_ptr<llvm::ErrorInfoBase> info) {
m_error = std::move(info);
});
m_pt_insn.ip = LLDB_INVALID_ADDRESS;
m_pt_insn.iclass = ptic_error;
}
bool IntelPTInstruction::IsError() const { return (bool)m_error; }
lldb::addr_t IntelPTInstruction::GetLoadAddress() const { return m_pt_insn.ip; }
Optional<uint64_t> IntelPTInstruction::GetTimestampCounter() const {
return m_timestamp;
}
Error IntelPTInstruction::ToError() const {
if (!IsError())
return Error::success();
if (m_error->isA<IntelPTError>())
return make_error<IntelPTError>(static_cast<IntelPTError &>(*m_error));
return make_error<StringError>(m_error->message(),
m_error->convertToErrorCode());
}
size_t DecodedThread::GetRawTraceSize() const { return m_raw_trace_size; }
TraceInstructionControlFlowType
IntelPTInstruction::GetControlFlowType(lldb::addr_t next_load_address) const {
if (IsError())
return (TraceInstructionControlFlowType)0;
TraceInstructionControlFlowType mask =
eTraceInstructionControlFlowTypeInstruction;
switch (m_pt_insn.iclass) {
case ptic_cond_jump:
case ptic_jump:
case ptic_far_jump:
mask |= eTraceInstructionControlFlowTypeBranch;
if (m_pt_insn.ip + m_pt_insn.size != next_load_address)
mask |= eTraceInstructionControlFlowTypeTakenBranch;
break;
case ptic_return:
case ptic_far_return:
mask |= eTraceInstructionControlFlowTypeReturn;
break;
case ptic_call:
case ptic_far_call:
mask |= eTraceInstructionControlFlowTypeCall;
break;
default:
break;
}
return mask;
}
ArrayRef<IntelPTInstruction> DecodedThread::GetInstructions() const {
return makeArrayRef(m_instructions);
}
DecodedThread::DecodedThread(ThreadSP thread_sp, Error error)
: m_thread_sp(thread_sp) {
m_instructions.emplace_back(std::move(error));
}
DecodedThread::DecodedThread(ThreadSP thread_sp,
std::vector<IntelPTInstruction> &&instructions,
size_t raw_trace_size)
: m_thread_sp(thread_sp), m_instructions(std::move(instructions)),
m_raw_trace_size(raw_trace_size) {
if (m_instructions.empty())
m_instructions.emplace_back(
createStringError(inconvertibleErrorCode(), "empty trace"));
}
lldb::TraceCursorUP DecodedThread::GetCursor() {
return std::make_unique<TraceCursorIntelPT>(m_thread_sp, shared_from_this());
}
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