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3e768ed9c0
Define a new DWARF parser class, dwarf2reader::CallFrameInfo. Extend google_breakpad::Module to store and write out 'STACK CFI' records. Define a new google_breakpad::DwarfCFIToModule class, to accept DWARF CFI data from the parser and populate a Module with the equivalent STACK CFI records. Extend the Linux symbol dumping tool, dump_syms, to use dwarf2reader::CallFrameInfo, google_breakpad::DwarfCFIToModule, and google_breakpad::Module to extract DWARF CFI from the executable or shared library files and write it to the Breakpad symbol file. Define CFISection, a new class derived from TestAssembler::Section, for use in creating DWARF CFI data for test cases. a=jimblandy, r=nealsid git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@550 4c0a9323-5329-0410-9bdc-e9ce6186880e
104 lines
3.7 KiB
C++
104 lines
3.7 KiB
C++
// Copyright (c) 2010, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com>
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// cfi_assembler.cc: Implementation of google_breakpad::CFISection class.
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// See cfi_assembler.h for details.
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#include <cassert>
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#include "common/dwarf/cfi_assembler.h"
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#include "common/dwarf/dwarf2enums.h"
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namespace google_breakpad {
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CFISection &CFISection::CIEHeader(u_int64_t code_alignment_factor,
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int data_alignment_factor,
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unsigned return_address_register,
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u_int8_t version,
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const string &augmentation,
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bool dwarf64) {
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assert(!entry_length_);
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entry_length_ = new PendingLength();
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if (dwarf64) {
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D32(0xffffffff);
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D64(entry_length_->length);
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entry_length_->start = Here();
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D64(0xffffffffffffffffULL); // CIE distinguished value
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} else {
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D32(entry_length_->length);
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entry_length_->start = Here();
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D32(0xffffffff); // CIE distinguished value
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}
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D8(version);
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AppendCString(augmentation);
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ULEB128(code_alignment_factor);
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LEB128(data_alignment_factor);
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if (version == 1)
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D8(return_address_register);
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else
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ULEB128(return_address_register);
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return *this;
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}
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CFISection &CFISection::FDEHeader(Label cie_pointer,
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u_int64_t initial_location,
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u_int64_t address_range,
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bool dwarf64) {
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assert(!entry_length_);
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entry_length_ = new PendingLength();
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if (dwarf64) {
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D32(0xffffffff);
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D64(entry_length_->length);
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entry_length_->start = Here();
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D64(cie_pointer);
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} else {
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D32(entry_length_->length);
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entry_length_->start = Here();
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D32(cie_pointer);
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}
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Append(endianness(), address_size_, initial_location);
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Append(endianness(), address_size_, address_range);
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return *this;
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}
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CFISection &CFISection::FinishEntry() {
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assert(entry_length_);
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Align(address_size_, dwarf2reader::DW_CFA_nop);
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entry_length_->length = Here() - entry_length_->start;
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delete entry_length_;
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entry_length_ = NULL;
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return *this;
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}
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};
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