contrib/llvm/tools/lldb/source/Plugins/Process/minidump/ThreadMinidump.cpp

   1 //===-- ThreadMinidump.cpp --------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "ThreadMinidump.h"
  10
  11 #include "ProcessMinidump.h"
  12
  13 #include "RegisterContextMinidump_ARM.h"
  14 #include "RegisterContextMinidump_ARM64.h"
  15 #include "RegisterContextMinidump_x86_32.h"
  16 #include "RegisterContextMinidump_x86_64.h"
  17
  18 #include "Plugins/Process/Utility/RegisterContextLinux_i386.h"
  19 #include "Plugins/Process/Utility/RegisterContextLinux_x86_64.h"
  20 #include "Plugins/Process/elf-core/RegisterContextPOSIXCore_x86_64.h"
  21 #include "Plugins/Process/elf-core/RegisterUtilities.h"
  22
  23 #include "lldb/Target/RegisterContext.h"
  24 #include "lldb/Target/StopInfo.h"
  25 #include "lldb/Target/Target.h"
  26 #include "lldb/Target/Unwind.h"
  27 #include "lldb/Utility/DataExtractor.h"
  28 #include "lldb/Utility/Log.h"
  29
  30 #include <memory>
  31
  32 using namespace lldb;
  33 using namespace lldb_private;
  34 using namespace minidump;
  35
  36 ThreadMinidump::ThreadMinidump(Process &process, const minidump::Thread &td,
  37                                llvm::ArrayRef<uint8_t> gpregset_data)
  38     : Thread(process, td.ThreadId), m_thread_reg_ctx_sp(),
  39       m_gpregset_data(gpregset_data) {}
  40
  41 ThreadMinidump::~ThreadMinidump() {}
  42
  43 void ThreadMinidump::RefreshStateAfterStop() {}
  44
  45 RegisterContextSP ThreadMinidump::GetRegisterContext() {
  46   if (!m_reg_context_sp) {
  47     m_reg_context_sp = CreateRegisterContextForFrame(nullptr);
  48   }
  49   return m_reg_context_sp;
  50 }
  51
  52 RegisterContextSP
  53 ThreadMinidump::CreateRegisterContextForFrame(StackFrame *frame) {
  54   RegisterContextSP reg_ctx_sp;
  55   uint32_t concrete_frame_idx = 0;
  56
  57   if (frame)
  58     concrete_frame_idx = frame->GetConcreteFrameIndex();
  59
  60   if (concrete_frame_idx == 0) {
  61     if (m_thread_reg_ctx_sp)
  62       return m_thread_reg_ctx_sp;
  63
  64     ProcessMinidump *process =
  65         static_cast<ProcessMinidump *>(GetProcess().get());
  66     ArchSpec arch = process->GetArchitecture();
  67     RegisterInfoInterface *reg_interface = nullptr;
  68
  69     // TODO write other register contexts and add them here
  70     switch (arch.GetMachine()) {
  71     case llvm::Triple::x86: {
  72       reg_interface = new RegisterContextLinux_i386(arch);
  73       lldb::DataBufferSP buf =
  74           ConvertMinidumpContext_x86_32(m_gpregset_data, reg_interface);
  75       DataExtractor gpregset(buf, lldb::eByteOrderLittle, 4);
  76       m_thread_reg_ctx_sp = std::make_shared<RegisterContextCorePOSIX_x86_64>(
  77           *this, reg_interface, gpregset,
  78           llvm::ArrayRef<lldb_private::CoreNote>());
  79       break;
  80     }
  81     case llvm::Triple::x86_64: {
  82       reg_interface = new RegisterContextLinux_x86_64(arch);
  83       lldb::DataBufferSP buf =
  84           ConvertMinidumpContext_x86_64(m_gpregset_data, reg_interface);
  85       DataExtractor gpregset(buf, lldb::eByteOrderLittle, 8);
  86       m_thread_reg_ctx_sp = std::make_shared<RegisterContextCorePOSIX_x86_64>(
  87           *this, reg_interface, gpregset,
  88           llvm::ArrayRef<lldb_private::CoreNote>());
  89       break;
  90     }
  91     case llvm::Triple::aarch64: {
  92       DataExtractor data(m_gpregset_data.data(), m_gpregset_data.size(),
  93                          lldb::eByteOrderLittle, 8);
  94       m_thread_reg_ctx_sp =
  95           std::make_shared<RegisterContextMinidump_ARM64>(*this, data);
  96       break;
  97     }
  98     case llvm::Triple::arm: {
  99       DataExtractor data(m_gpregset_data.data(), m_gpregset_data.size(),
 100                          lldb::eByteOrderLittle, 8);
 101       const bool apple = arch.GetTriple().getVendor() == llvm::Triple::Apple;
 102       m_thread_reg_ctx_sp =
 103           std::make_shared<RegisterContextMinidump_ARM>(*this, data, apple);
 104       break;
 105     }
 106     default:
 107       break;
 108     }
 109
 110     reg_ctx_sp = m_thread_reg_ctx_sp;
 111   } else if (m_unwinder_up) {
 112     reg_ctx_sp = m_unwinder_up->CreateRegisterContextForFrame(frame);
 113   }
 114
 115   return reg_ctx_sp;
 116 }
 117
 118 bool ThreadMinidump::CalculateStopInfo() { return false; }