xref: /openbsd-src/gnu/llvm/lldb/source/Core/DumpRegisterValue.cpp (revision f6aab3d83b51b91c24247ad2c2573574de475a82)

//===-- DumpRegisterValue.cpp ---------------------------------------------===//
//
// 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 "lldb/Core/DumpRegisterValue.h"
#include "lldb/Core/DumpDataExtractor.h"
#include "lldb/Utility/DataExtractor.h"
#include "lldb/Utility/RegisterValue.h"
#include "lldb/Utility/StreamString.h"
#include "lldb/lldb-private-types.h"

using namespace lldb;

void lldb_private::DumpRegisterValue(const RegisterValue &reg_val, Stream *s,
                                     const RegisterInfo *reg_info,
                                     bool prefix_with_name,
                                     bool prefix_with_alt_name, Format format,
                                     uint32_t reg_name_right_align_at,
                                     ExecutionContextScope *exe_scope) {
  DataExtractor data;
  if (!reg_val.GetData(data))
    return;

  bool name_printed = false;
  // For simplicity, alignment of the register name printing applies only in
  // the most common case where:
  //
  //     prefix_with_name^prefix_with_alt_name is true
  //
  StreamString format_string;
  if (reg_name_right_align_at && (prefix_with_name ^ prefix_with_alt_name))
    format_string.Printf("%%%us", reg_name_right_align_at);
  else
    format_string.Printf("%%s");
  std::string fmt = std::string(format_string.GetString());
  if (prefix_with_name) {
    if (reg_info->name) {
      s->Printf(fmt.c_str(), reg_info->name);
      name_printed = true;
    } else if (reg_info->alt_name) {
      s->Printf(fmt.c_str(), reg_info->alt_name);
      prefix_with_alt_name = false;
      name_printed = true;
    }
  }
  if (prefix_with_alt_name) {
    if (name_printed)
      s->PutChar('/');
    if (reg_info->alt_name) {
      s->Printf(fmt.c_str(), reg_info->alt_name);
      name_printed = true;
    } else if (!name_printed) {
      // No alternate name but we were asked to display a name, so show the
      // main name
      s->Printf(fmt.c_str(), reg_info->name);
      name_printed = true;
    }
  }
  if (name_printed)
    s->PutCString(" = ");

  if (format == eFormatDefault)
    format = reg_info->format;

  DumpDataExtractor(data, s,
                    0,                    // Offset in "data"
                    format,               // Format to use when dumping
                    reg_info->byte_size,  // item_byte_size
                    1,                    // item_count
                    UINT32_MAX,           // num_per_line
                    LLDB_INVALID_ADDRESS, // base_addr
                    0,                    // item_bit_size
                    0,                    // item_bit_offset
                    exe_scope);
}