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