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| //===-- ThreadPlanTracer.cpp ------------------------------------*- C++ -*-===//
//
// 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 <cstring>
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Disassembler.h"
#include "lldb/Core/DumpRegisterValue.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Core/Value.h"
#include "lldb/Symbol/TypeList.h"
#include "lldb/Symbol/TypeSystem.h"
#include "lldb/Target/ABI.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/RegisterContext.h"
#include "lldb/Target/SectionLoadList.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/Thread.h"
#include "lldb/Target/ThreadPlan.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "lldb/Utility/DataExtractor.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/State.h"
using namespace lldb;
using namespace lldb_private;
#pragma mark ThreadPlanTracer
ThreadPlanTracer::ThreadPlanTracer(Thread &thread, lldb::StreamSP &stream_sp)
: m_thread(thread), m_single_step(true), m_enabled(false),
m_stream_sp(stream_sp) {}
ThreadPlanTracer::ThreadPlanTracer(Thread &thread)
: m_thread(thread), m_single_step(true), m_enabled(false), m_stream_sp() {}
Stream *ThreadPlanTracer::GetLogStream() {
if (m_stream_sp)
return m_stream_sp.get();
else {
TargetSP target_sp(m_thread.CalculateTarget());
if (target_sp)
return &(target_sp->GetDebugger().GetOutputStream());
}
return nullptr;
}
void ThreadPlanTracer::Log() {
SymbolContext sc;
bool show_frame_index = false;
bool show_fullpaths = false;
Stream *stream = GetLogStream();
if (stream) {
m_thread.GetStackFrameAtIndex(0)->Dump(stream, show_frame_index,
show_fullpaths);
stream->Printf("\n");
stream->Flush();
}
}
bool ThreadPlanTracer::TracerExplainsStop() {
if (m_enabled && m_single_step) {
lldb::StopInfoSP stop_info = m_thread.GetStopInfo();
return (stop_info->GetStopReason() == eStopReasonTrace);
} else
return false;
}
#pragma mark ThreadPlanAssemblyTracer
ThreadPlanAssemblyTracer::ThreadPlanAssemblyTracer(Thread &thread,
lldb::StreamSP &stream_sp)
: ThreadPlanTracer(thread, stream_sp), m_disassembler_sp(), m_intptr_type(),
m_register_values() {}
ThreadPlanAssemblyTracer::ThreadPlanAssemblyTracer(Thread &thread)
: ThreadPlanTracer(thread), m_disassembler_sp(), m_intptr_type(),
m_register_values() {}
Disassembler *ThreadPlanAssemblyTracer::GetDisassembler() {
if (!m_disassembler_sp)
m_disassembler_sp = Disassembler::FindPlugin(
m_thread.GetProcess()->GetTarget().GetArchitecture(), nullptr, nullptr);
return m_disassembler_sp.get();
}
TypeFromUser ThreadPlanAssemblyTracer::GetIntPointerType() {
if (!m_intptr_type.IsValid()) {
if (auto target_sp = m_thread.CalculateTarget()) {
auto type_system_or_err =
target_sp->GetScratchTypeSystemForLanguage(eLanguageTypeC);
if (auto err = type_system_or_err.takeError()) {
LLDB_LOG_ERROR(
lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_TYPES),
std::move(err),
"Unable to get integer pointer type from TypeSystem");
} else {
m_intptr_type = TypeFromUser(
type_system_or_err->GetBuiltinTypeForEncodingAndBitSize(
eEncodingUint,
target_sp->GetArchitecture().GetAddressByteSize() * 8));
}
}
}
return m_intptr_type;
}
ThreadPlanAssemblyTracer::~ThreadPlanAssemblyTracer() = default;
void ThreadPlanAssemblyTracer::TracingStarted() {
RegisterContext *reg_ctx = m_thread.GetRegisterContext().get();
if (m_register_values.empty())
m_register_values.resize(reg_ctx->GetRegisterCount());
}
void ThreadPlanAssemblyTracer::TracingEnded() { m_register_values.clear(); }
void ThreadPlanAssemblyTracer::Log() {
Stream *stream = GetLogStream();
if (!stream)
return;
RegisterContext *reg_ctx = m_thread.GetRegisterContext().get();
lldb::addr_t pc = reg_ctx->GetPC();
ProcessSP process_sp(m_thread.GetProcess());
Address pc_addr;
bool addr_valid = false;
uint8_t buffer[16] = {0}; // Must be big enough for any single instruction
addr_valid = process_sp->GetTarget().GetSectionLoadList().ResolveLoadAddress(
pc, pc_addr);
pc_addr.Dump(stream, &m_thread, Address::DumpStyleResolvedDescription,
Address::DumpStyleModuleWithFileAddress);
stream->PutCString(" ");
Disassembler *disassembler = GetDisassembler();
if (disassembler) {
Status err;
process_sp->ReadMemory(pc, buffer, sizeof(buffer), err);
if (err.Success()) {
DataExtractor extractor(buffer, sizeof(buffer),
process_sp->GetByteOrder(),
process_sp->GetAddressByteSize());
bool data_from_file = false;
if (addr_valid)
disassembler->DecodeInstructions(pc_addr, extractor, 0, 1, false,
data_from_file);
else
disassembler->DecodeInstructions(Address(pc), extractor, 0, 1, false,
data_from_file);
InstructionList &instruction_list = disassembler->GetInstructionList();
const uint32_t max_opcode_byte_size =
instruction_list.GetMaxOpcocdeByteSize();
if (instruction_list.GetSize()) {
const bool show_bytes = true;
const bool show_address = true;
Instruction *instruction =
instruction_list.GetInstructionAtIndex(0).get();
const FormatEntity::Entry *disassemble_format =
m_thread.GetProcess()
->GetTarget()
.GetDebugger()
.GetDisassemblyFormat();
instruction->Dump(stream, max_opcode_byte_size, show_address,
show_bytes, nullptr, nullptr, nullptr,
disassemble_format, 0);
}
}
}
const ABI *abi = process_sp->GetABI().get();
TypeFromUser intptr_type = GetIntPointerType();
if (abi && intptr_type.IsValid()) {
ValueList value_list;
const int num_args = 1;
for (int arg_index = 0; arg_index < num_args; ++arg_index) {
Value value;
value.SetValueType(Value::eValueTypeScalar);
value.SetCompilerType(intptr_type);
value_list.PushValue(value);
}
if (abi->GetArgumentValues(m_thread, value_list)) {
for (int arg_index = 0; arg_index < num_args; ++arg_index) {
stream->Printf(
"\n\targ[%d]=%llx", arg_index,
value_list.GetValueAtIndex(arg_index)->GetScalar().ULongLong());
if (arg_index + 1 < num_args)
stream->PutCString(", ");
}
}
}
RegisterValue reg_value;
for (uint32_t reg_num = 0, num_registers = reg_ctx->GetRegisterCount();
reg_num < num_registers; ++reg_num) {
const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoAtIndex(reg_num);
if (reg_ctx->ReadRegister(reg_info, reg_value)) {
assert(reg_num < m_register_values.size());
if (m_register_values[reg_num].GetType() == RegisterValue::eTypeInvalid ||
reg_value != m_register_values[reg_num]) {
if (reg_value.GetType() != RegisterValue::eTypeInvalid) {
stream->PutCString("\n\t");
DumpRegisterValue(reg_value, stream, reg_info, true, false,
eFormatDefault);
}
}
m_register_values[reg_num] = reg_value;
}
}
stream->EOL();
stream->Flush();
}
|