First round of dead file removal

obsolete/breakpad/common/dwarf_cfi_to_module.cc

-// -*- mode: c++ -*-
-
-// Copyright (c) 2010, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com>
-
-// Implementation of google_breakpad::DwarfCFIToModule.
-// See dwarf_cfi_to_module.h for details.
-
-#include <sstream>
-
-#include "common/dwarf_cfi_to_module.h"
-
-namespace google_breakpad {
-
-using std::ostringstream;
-
-bool DwarfCFIToModule::Entry(size_t offset, uint64 address, uint64 length,
-                             uint8 version, const string &augmentation,
-                             unsigned return_address) {
-  assert(!entry_);
-
-  // If dwarf2reader::CallFrameInfo can handle this version and
-  // augmentation, then we should be okay with that, so there's no
-  // need to check them here.
-
-  // Get ready to collect entries.
-  entry_ = new Module::StackFrameEntry;
-  entry_->address = address;
-  entry_->size = length;
-  entry_offset_ = offset;
-  return_address_ = return_address;
-
-  // Breakpad STACK CFI records must provide a .ra rule, but DWARF CFI
-  // may not establish any rule for .ra if the return address column
-  // is an ordinary register, and that register holds the return
-  // address on entry to the function. So establish an initial .ra
-  // rule citing the return address register.
-  if (return_address_ < register_names_.size())
-    entry_->initial_rules[".ra"] = register_names_[return_address_];
-
-  return true;
-}
-
-string DwarfCFIToModule::RegisterName(int i) {
-  assert(entry_);
-  if (i < 0) {
-    assert(i == kCFARegister);
-    return ".cfa";
-  }
-  unsigned reg = i;
-  if (reg == return_address_)
-    return ".ra";
-
-  if (0 <= reg && reg < register_names_.size())
-    return register_names_[reg];
-
-  reporter_->UnnamedRegister(entry_offset_, reg);
-  char buf[30];
-  sprintf(buf, "unnamed_register%u", reg);
-  return buf;
-}
-
-void DwarfCFIToModule::Record(Module::Address address, int reg,
-                              const string &rule) {
-  assert(entry_);
-  // Is this one of this entry's initial rules?
-  if (address == entry_->address)
-    entry_->initial_rules[RegisterName(reg)] = rule;
-  // File it under the appropriate address.
-  else
-    entry_->rule_changes[address][RegisterName(reg)] = rule;
-}
-
-bool DwarfCFIToModule::UndefinedRule(uint64 address, int reg) {
-  reporter_->UndefinedNotSupported(entry_offset_, RegisterName(reg));
-  // Treat this as a non-fatal error.
-  return true;
-}
-
-bool DwarfCFIToModule::SameValueRule(uint64 address, int reg) {
-  ostringstream s;
-  s << RegisterName(reg);
-  Record(address, reg, s.str());
-  return true;
-}
-
-bool DwarfCFIToModule::OffsetRule(uint64 address, int reg,
-                                  int base_register, long offset) {
-  ostringstream s;
-  s << RegisterName(base_register) << " " << offset << " + ^";
-  Record(address, reg, s.str());
-  return true;
-}
-
-bool DwarfCFIToModule::ValOffsetRule(uint64 address, int reg,
-                                     int base_register, long offset) {
-  ostringstream s;
-  s << RegisterName(base_register) << " " << offset << " +";
-  Record(address, reg, s.str());
-  return true;
-}
-
-bool DwarfCFIToModule::RegisterRule(uint64 address, int reg,
-                                    int base_register) {
-  ostringstream s;
-  s << RegisterName(base_register);
-  Record(address, reg, s.str());
-  return true;
-}
-
-bool DwarfCFIToModule::ExpressionRule(uint64 address, int reg,
-                                      const string &expression) {
-  reporter_->ExpressionsNotSupported(entry_offset_, RegisterName(reg));
-  // Treat this as a non-fatal error.
-  return true;
-}
-
-bool DwarfCFIToModule::ValExpressionRule(uint64 address, int reg,
-                                         const string &expression) {
-  reporter_->ExpressionsNotSupported(entry_offset_, RegisterName(reg));
-  // Treat this as a non-fatal error.
-  return true;
-}
-
-bool DwarfCFIToModule::End() {
-  module_->AddStackFrameEntry(entry_);
-  entry_ = NULL;
-  return true;
-}
-
-void DwarfCFIToModule::Reporter::UnnamedRegister(size_t offset, int reg) {
-  fprintf(stderr, "%s, section '%s': "
-          "the call frame entry at offset 0x%zx refers to register %d,"
-          " whose name we don't know\n",
-          file_.c_str(), section_.c_str(), offset, reg);
-}
-
-void DwarfCFIToModule::Reporter::UndefinedNotSupported(size_t offset,
-                                                       const string &reg) {
-  fprintf(stderr, "%s, section '%s': "
-          "the call frame entry at offset 0x%zx sets the rule for "
-          "register '%s' to 'undefined', but the Breakpad symbol file format"
-          " cannot express this\n",
-          file_.c_str(), section_.c_str(), offset, reg.c_str());
-}
-
-void DwarfCFIToModule::Reporter::ExpressionsNotSupported(size_t offset,
-                                                         const string &reg) {
-  fprintf(stderr, "%s, section '%s': "
-          "the call frame entry at offset 0x%zx uses a DWARF expression to"
-          " describe how to recover register '%s', "
-          " but this translator cannot yet translate DWARF expressions to"
-          " Breakpad postfix expressions\n",
-          file_.c_str(), section_.c_str(), offset, reg.c_str());
-}
-
-} // namespace google_breakpad