diff options
Diffstat (limited to 'src/common/linux/dwarf_cfi_to_module.cc')
| -rw-r--r-- | src/common/linux/dwarf_cfi_to_module.cc | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/src/common/linux/dwarf_cfi_to_module.cc b/src/common/linux/dwarf_cfi_to_module.cc deleted file mode 100644 index 603acc0e..00000000 --- a/src/common/linux/dwarf_cfi_to_module.cc +++ /dev/null @@ -1,185 +0,0 @@ -// -*- 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/linux/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 ®) { - 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 ®) { - 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 |