contrib/llvm/tools/lldb/source/Core/DumpRegisterValue.cpp

   1 //===-- DumpRegisterValue.cpp -----------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "lldb/Core/DumpRegisterValue.h"
  11 #include "lldb/Core/DumpDataExtractor.h"
  12 #include "lldb/Core/RegisterValue.h"
  13 #include "lldb/Utility/DataExtractor.h"
  14 #include "lldb/Utility/StreamString.h"
  15 #include "lldb/lldb-private-types.h"
  16
  17 using namespace lldb;
  18
  19 bool lldb_private::DumpRegisterValue(const RegisterValue &reg_val, Stream *s,
  20                                      const RegisterInfo *reg_info,
  21                                      bool prefix_with_name,
  22                                      bool prefix_with_alt_name, Format format,
  23                                      uint32_t reg_name_right_align_at) {
  24   DataExtractor data;
  25   if (reg_val.GetData(data)) {
  26     bool name_printed = false;
  27     // For simplicity, alignment of the register name printing applies only in
  28     // the most common case where:
  29     //
  30     //     prefix_with_name^prefix_with_alt_name is true
  31     //
  32     StreamString format_string;
  33     if (reg_name_right_align_at && (prefix_with_name ^ prefix_with_alt_name))
  34       format_string.Printf("%%%us", reg_name_right_align_at);
  35     else
  36       format_string.Printf("%%s");
  37     std::string fmt = format_string.GetString();
  38     if (prefix_with_name) {
  39       if (reg_info->name) {
  40         s->Printf(fmt.c_str(), reg_info->name);
  41         name_printed = true;
  42       } else if (reg_info->alt_name) {
  43         s->Printf(fmt.c_str(), reg_info->alt_name);
  44         prefix_with_alt_name = false;
  45         name_printed = true;
  46       }
  47     }
  48     if (prefix_with_alt_name) {
  49       if (name_printed)
  50         s->PutChar('/');
  51       if (reg_info->alt_name) {
  52         s->Printf(fmt.c_str(), reg_info->alt_name);
  53         name_printed = true;
  54       } else if (!name_printed) {
  55         // No alternate name but we were asked to display a name, so show the
  56         // main name
  57         s->Printf(fmt.c_str(), reg_info->name);
  58         name_printed = true;
  59       }
  60     }
  61     if (name_printed)
  62       s->PutCString(" = ");
  63
  64     if (format == eFormatDefault)
  65       format = reg_info->format;
  66
  67     DumpDataExtractor(data, s,
  68                       0,                    // Offset in "data"
  69                       format,               // Format to use when dumping
  70                       reg_info->byte_size,  // item_byte_size
  71                       1,                    // item_count
  72                       UINT32_MAX,           // num_per_line
  73                       LLDB_INVALID_ADDRESS, // base_addr
  74                       0,                    // item_bit_size
  75                       0);                   // item_bit_offset
  76     return true;
  77   }
  78   return false;
  79 }