C++ StackFrame::GetSymbolContext方法代码示例

bool
ThreadPlanStepRange::InRange ()
{
    Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP));
    bool ret_value = false;

    lldb::addr_t pc_load_addr = m_thread.GetRegisterContext()->GetPC();

    size_t num_ranges = m_address_ranges.size();
    for (size_t i = 0; i < num_ranges; i++)
    {
        ret_value = m_address_ranges[i].ContainsLoadAddress(pc_load_addr, m_thread.CalculateTarget().get());
        if (ret_value)
            break;
    }
    
    if (!ret_value && !m_given_ranges_only)
    {
        // See if we've just stepped to another part of the same line number...
        StackFrame *frame = m_thread.GetStackFrameAtIndex(0).get();
        
        SymbolContext new_context(frame->GetSymbolContext(eSymbolContextEverything));
        if (m_addr_context.line_entry.IsValid() && new_context.line_entry.IsValid())
        {
            if (m_addr_context.line_entry.original_file == new_context.line_entry.original_file)
            {
                if (m_addr_context.line_entry.line == new_context.line_entry.line)
                {
                    m_addr_context = new_context;
                    AddRange(m_addr_context.line_entry.GetSameLineContiguousAddressRange());
                    ret_value = true;
                    if (log)
                    {
                        StreamString s;
                        m_addr_context.line_entry.Dump (&s,
                                                        m_thread.CalculateTarget().get(),
                                                        true,
                                                        Address::DumpStyleLoadAddress,
                                                        Address::DumpStyleLoadAddress,
                                                        true);

                        log->Printf ("Step range plan stepped to another range of same line: %s", s.GetData());
                    }
                }
                else if (new_context.line_entry.line == 0)
                {
                    new_context.line_entry.line = m_addr_context.line_entry.line;
                    m_addr_context = new_context;
                    AddRange(m_addr_context.line_entry.GetSameLineContiguousAddressRange());
                    ret_value = true;
                    if (log)
                    {
                        StreamString s;
                        m_addr_context.line_entry.Dump (&s,
                                                        m_thread.CalculateTarget().get(),
                                                        true,
                                                        Address::DumpStyleLoadAddress,
                                                        Address::DumpStyleLoadAddress,
                                                        true);

                        log->Printf ("Step range plan stepped to a range at linenumber 0 stepping through that range: %s", s.GetData());
                    }
                }
                else if (new_context.line_entry.range.GetBaseAddress().GetLoadAddress(m_thread.CalculateTarget().get())
                         != pc_load_addr)
                {
                    // Another thing that sometimes happens here is that we step out of one line into the MIDDLE of another
                    // line.  So far I mostly see this due to bugs in the debug information.
                    // But we probably don't want to be in the middle of a line range, so in that case reset the stepping
                    // range to the line we've stepped into the middle of and continue.
                    m_addr_context = new_context;
                    m_address_ranges.clear();
                    AddRange(m_addr_context.line_entry.range);
                    ret_value = true;
                    if (log)
                    {
                        StreamString s;
                        m_addr_context.line_entry.Dump (&s, 
                                                        m_thread.CalculateTarget().get(),
                                                        true,
                                                        Address::DumpStyleLoadAddress,
                                                        Address::DumpStyleLoadAddress,
                                                        true);

                        log->Printf ("Step range plan stepped to the middle of new line(%d): %s, continuing to clear this line.", 
                                     new_context.line_entry.line, 
                                     s.GetData());
                    }
                }
            }
        }
    }

    if (!ret_value && log)
        log->Printf ("Step range plan out of range to 0x%" PRIx64, pc_load_addr);

    return ret_value;
}

SBValue
SBFrame::FindValue (const char *name, ValueType value_type, lldb::DynamicValueType use_dynamic)
{
    Log *log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_API));
    SBValue sb_value;
    
    if (name == NULL || name[0] == '\0')
    {
        if (log)
            log->Printf ("SBFrame::FindValue called with empty name.");
        return sb_value;
    }
    
    ValueObjectSP value_sp;
    Mutex::Locker api_locker;
    ExecutionContext exe_ctx (m_opaque_sp.get(), api_locker);

    StackFrame *frame = NULL;
    Target *target = exe_ctx.GetTargetPtr();
    Process *process = exe_ctx.GetProcessPtr();
    if (target && process)
    {
        Process::StopLocker stop_locker;
        if (stop_locker.TryLock(&process->GetRunLock()))
        {
            frame = exe_ctx.GetFramePtr();
            if (frame)
            {
                switch (value_type)
                {
                case eValueTypeVariableGlobal:      // global variable
                case eValueTypeVariableStatic:      // static variable
                case eValueTypeVariableArgument:    // function argument variables
                case eValueTypeVariableLocal:       // function local variables
                    {
                        VariableList *variable_list = frame->GetVariableList(true);

                        SymbolContext sc (frame->GetSymbolContext (eSymbolContextBlock));

                        const bool can_create = true;
                        const bool get_parent_variables = true;
                        const bool stop_if_block_is_inlined_function = true;

                        if (sc.block && sc.block->AppendVariables (can_create, 
                                                                   get_parent_variables,
                                                                   stop_if_block_is_inlined_function,
                                                                   variable_list))
                        {
                            ConstString const_name(name);
                            const uint32_t num_variables = variable_list->GetSize();
                            for (uint32_t i = 0; i < num_variables; ++i)
                            {
                                VariableSP variable_sp (variable_list->GetVariableAtIndex(i));
                                if (variable_sp && 
                                    variable_sp->GetScope() == value_type &&
                                    variable_sp->GetName() == const_name)
                                {
                                    value_sp = frame->GetValueObjectForFrameVariable (variable_sp, eNoDynamicValues);
                                    sb_value.SetSP (value_sp, use_dynamic);
                                    break;
                                }
                            }
                        }
                    }
                    break;

                case eValueTypeRegister:            // stack frame register value
                    {
                        RegisterContextSP reg_ctx (frame->GetRegisterContext());
                        if (reg_ctx)
                        {
                            const uint32_t num_regs = reg_ctx->GetRegisterCount();
                            for (uint32_t reg_idx = 0; reg_idx < num_regs; ++reg_idx)
                            {
                                const RegisterInfo *reg_info = reg_ctx->GetRegisterInfoAtIndex (reg_idx);
                                if (reg_info && 
                                    ((reg_info->name && strcasecmp (reg_info->name, name) == 0) ||
                                     (reg_info->alt_name && strcasecmp (reg_info->alt_name, name) == 0)))
                                {
                                    value_sp = ValueObjectRegister::Create (frame, reg_ctx, reg_idx);
                                    sb_value.SetSP (value_sp);
                                    break;
                                }
                            }
                        }
                    }
                    break;

                case eValueTypeRegisterSet:         // A collection of stack frame register values
                    {
                        RegisterContextSP reg_ctx (frame->GetRegisterContext());
                        if (reg_ctx)
                        {
                            const uint32_t num_sets = reg_ctx->GetRegisterSetCount();
                            for (uint32_t set_idx = 0; set_idx < num_sets; ++set_idx)
                            {
                                const RegisterSet *reg_set = reg_ctx->GetRegisterSet (set_idx);
                                if (reg_set && 
                                    ((reg_set->name && strcasecmp (reg_set->name, name) == 0) ||
                                     (reg_set->short_name && strcasecmp (reg_set->short_name, name) == 0)))
//.........这里部分代码省略.........

//.........这里部分代码省略.........
    options |= Disassembler::eOptionShowBytes;

  if (m_options.raw)
    options |= Disassembler::eOptionRawOuput;

  if (!m_options.func_name.empty()) {
    ConstString name(m_options.func_name.c_str());

    if (Disassembler::Disassemble(
            m_interpreter.GetDebugger(), m_options.arch, plugin_name,
            flavor_string, m_exe_ctx, name,
            nullptr, // Module *
            m_options.num_instructions, m_options.show_mixed,
            m_options.show_mixed ? m_options.num_lines_context : 0, options,
            result.GetOutputStream())) {
      result.SetStatus(eReturnStatusSuccessFinishResult);
    } else {
      result.AppendErrorWithFormat("Unable to find symbol with name '%s'.\n",
                                   name.GetCString());
      result.SetStatus(eReturnStatusFailed);
    }
  } else {
    std::vector<AddressRange> ranges;
    AddressRange range;
    StackFrame *frame = m_exe_ctx.GetFramePtr();
    if (m_options.frame_line) {
      if (frame == nullptr) {
        result.AppendError("Cannot disassemble around the current line without "
                           "a selected frame.\n");
        result.SetStatus(eReturnStatusFailed);
        return false;
      }
      LineEntry pc_line_entry(
          frame->GetSymbolContext(eSymbolContextLineEntry).line_entry);
      if (pc_line_entry.IsValid()) {
        range = pc_line_entry.range;
      } else {
        m_options.at_pc =
            true; // No line entry, so just disassemble around the current pc
        m_options.show_mixed = false;
      }
    } else if (m_options.current_function) {
      if (frame == nullptr) {
        result.AppendError("Cannot disassemble around the current function "
                           "without a selected frame.\n");
        result.SetStatus(eReturnStatusFailed);
        return false;
      }
      Symbol *symbol = frame->GetSymbolContext(eSymbolContextSymbol).symbol;
      if (symbol) {
        range.GetBaseAddress() = symbol->GetAddress();
        range.SetByteSize(symbol->GetByteSize());
      }
    }

    // Did the "m_options.frame_line" find a valid range already? If so
    // skip the rest...
    if (range.GetByteSize() == 0) {
      if (m_options.at_pc) {
        if (frame == nullptr) {
          result.AppendError("Cannot disassemble around the current PC without "
                             "a selected frame.\n");
          result.SetStatus(eReturnStatusFailed);
          return false;
        }
        range.GetBaseAddress() = frame->GetFrameCodeAddress();

void ClangUserExpression::ScanContext(ExecutionContext &exe_ctx, Status &err) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS));

  if (log)
    log->Printf("ClangUserExpression::ScanContext()");

  m_target = exe_ctx.GetTargetPtr();

  if (!(m_allow_cxx || m_allow_objc)) {
    if (log)
      log->Printf("  [CUE::SC] Settings inhibit C++ and Objective-C");
    return;
  }

  StackFrame *frame = exe_ctx.GetFramePtr();
  if (frame == NULL) {
    if (log)
      log->Printf("  [CUE::SC] Null stack frame");
    return;
  }

  SymbolContext sym_ctx = frame->GetSymbolContext(lldb::eSymbolContextFunction |
                                                  lldb::eSymbolContextBlock);

  if (!sym_ctx.function) {
    if (log)
      log->Printf("  [CUE::SC] Null function");
    return;
  }

  // Find the block that defines the function represented by "sym_ctx"
  Block *function_block = sym_ctx.GetFunctionBlock();

  if (!function_block) {
    if (log)
      log->Printf("  [CUE::SC] Null function block");
    return;
  }

  CompilerDeclContext decl_context = function_block->GetDeclContext();

  if (!decl_context) {
    if (log)
      log->Printf("  [CUE::SC] Null decl context");
    return;
  }

  if (clang::CXXMethodDecl *method_decl =
          ClangASTContext::DeclContextGetAsCXXMethodDecl(decl_context)) {
    if (m_allow_cxx && method_decl->isInstance()) {
      if (m_enforce_valid_object) {
        lldb::VariableListSP variable_list_sp(
            function_block->GetBlockVariableList(true));

        const char *thisErrorString = "Stopped in a C++ method, but 'this' "
                                      "isn't available; pretending we are in a "
                                      "generic context";

        if (!variable_list_sp) {
          err.SetErrorString(thisErrorString);
          return;
        }

        lldb::VariableSP this_var_sp(
            variable_list_sp->FindVariable(ConstString("this")));

        if (!this_var_sp || !this_var_sp->IsInScope(frame) ||
            !this_var_sp->LocationIsValidForFrame(frame)) {
          err.SetErrorString(thisErrorString);
          return;
        }
      }

      m_in_cplusplus_method = true;
      m_needs_object_ptr = true;
    }
  } else if (clang::ObjCMethodDecl *method_decl =
                 ClangASTContext::DeclContextGetAsObjCMethodDecl(
                     decl_context)) {
    if (m_allow_objc) {
      if (m_enforce_valid_object) {
        lldb::VariableListSP variable_list_sp(
            function_block->GetBlockVariableList(true));

        const char *selfErrorString = "Stopped in an Objective-C method, but "
                                      "'self' isn't available; pretending we "
                                      "are in a generic context";

        if (!variable_list_sp) {
          err.SetErrorString(selfErrorString);
          return;
        }

        lldb::VariableSP self_variable_sp =
            variable_list_sp->FindVariable(ConstString("self"));

        if (!self_variable_sp || !self_variable_sp->IsInScope(frame) ||
            !self_variable_sp->LocationIsValidForFrame(frame)) {
          err.SetErrorString(selfErrorString);
          return;
//.........这里部分代码省略.........