The Tor Browser: comparison toolkit/crashreporter/google-breakpad/src/common/dwarf_cfi_to

--1:000000000000
+:12e662213d2a
+// -*- 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>
+// dwarf_cfi_to_module.h: Define the DwarfCFIToModule class, which
+// accepts parsed DWARF call frame info and adds it to a
+// google_breakpad::Module object, which can write that information to
+// a Breakpad symbol file.
+#ifndef COMMON_LINUX_DWARF_CFI_TO_MODULE_H
+#define COMMON_LINUX_DWARF_CFI_TO_MODULE_H
+#include <assert.h>
+#include <stdio.h>
+#include <set>
+#include <string>
+#include <vector>
+#include "common/module.h"
+#include "common/dwarf/dwarf2reader.h"
+#include "common/using_std_string.h"
+#include "common/unique_string.h"
+namespace google_breakpad {
+using dwarf2reader::CallFrameInfo;
+using google_breakpad::Module;
+using std::set;
+using std::vector;
+// A class that accepts parsed call frame information from the DWARF
+// CFI parser and populates a google_breakpad::Module object with the
+// contents.
+class DwarfCFIToModule: public CallFrameInfo::Handler {
+public:
+// DwarfCFIToModule uses an instance of this class to report errors
+// detected while converting DWARF CFI to Breakpad STACK CFI records.
+class Reporter {
+public:
+// Create a reporter that writes messages to the standard error
+// stream. FILE is the name of the file we're processing, and
+// SECTION is the name of the section within that file that we're
+// looking at (.debug_frame, .eh_frame, etc.).
+Reporter(const string &file, const string &section)
+: file_(file), section_(section) { }
+virtual ~Reporter() { }
+// The DWARF CFI entry at OFFSET cites register REG, but REG is not
+// covered by the vector of register names passed to the
+// DwarfCFIToModule constructor, nor does it match the return
+// address column number for this entry.
+virtual void UnnamedRegister(size_t offset, int reg);
+// The DWARF CFI entry at OFFSET says that REG is undefined, but the
+// Breakpad symbol file format cannot express this.
+virtual void UndefinedNotSupported(size_t offset,
+const UniqueString* reg);
+// The DWARF CFI entry at OFFSET says that REG uses a DWARF
+// expression to find its value, but DwarfCFIToModule is not
+// capable of translating DWARF expressions to Breakpad postfix
+// expressions.
+virtual void ExpressionsNotSupported(size_t offset,
+const UniqueString* reg);
+protected:
+string file_, section_;
+};
+// Register name tables. If TABLE is a vector returned by one of these
+// functions, then TABLE[R] is the name of the register numbered R in
+// DWARF call frame information.
+class RegisterNames {
+public:
+// Intel's "x86" or IA-32.
+static vector<const UniqueString*> I386();
+// AMD x86_64, AMD64, Intel EM64T, or Intel 64
+static vector<const UniqueString*> X86_64();
+// ARM.
+static vector<const UniqueString*> ARM();
+private:
+// Given STRINGS, an array of C strings with SIZE elements, return an
+// equivalent vector<string>.
+static vector<const UniqueString*> MakeVector(const char * const *strings,
+size_t size);
+};
+// Create a handler for the dwarf2reader::CallFrameInfo parser that
+// records the stack unwinding information it receives in MODULE.
+//
+// Use REGISTER_NAMES[I] as the name of register number I; *this
+// keeps a reference to the vector, so the vector should remain
+// alive for as long as the DwarfCFIToModule does.
+//
+// Use REPORTER for reporting problems encountered in the conversion
+// process.
+DwarfCFIToModule(Module *module,
+const vector<const UniqueString*> &register_names,
+Reporter *reporter)
+: module_(module), register_names_(register_names), reporter_(reporter),
+entry_(NULL), return_address_(-1) {
+}
+virtual ~DwarfCFIToModule() { delete entry_; }
+virtual bool Entry(size_t offset, uint64 address, uint64 length,
+uint8 version, const string &augmentation,
+unsigned return_address);
+virtual bool UndefinedRule(uint64 address, int reg);
+virtual bool SameValueRule(uint64 address, int reg);
+virtual bool OffsetRule(uint64 address, int reg,
+int base_register, long offset);
+virtual bool ValOffsetRule(uint64 address, int reg,
+int base_register, long offset);
+virtual bool RegisterRule(uint64 address, int reg, int base_register);
+virtual bool ExpressionRule(uint64 address, int reg,
+const string &expression);
+virtual bool ValExpressionRule(uint64 address, int reg,
+const string &expression);
+virtual bool End();
+private:
+// Return the name to use for register REG.
+const UniqueString* RegisterName(int i);
+// Record RULE for register REG at ADDRESS.
+void Record(Module::Address address, int reg, const Module::Expr &rule);
+// The module to which we should add entries.
+Module *module_;
+// Map from register numbers to register names.
+const vector<const UniqueString*> &register_names_;
+// The reporter to use to report problems.
+Reporter *reporter_;
+// The current entry we're constructing.
+Module::StackFrameEntry *entry_;
+// The section offset of the current frame description entry, for
+// use in error messages.
+size_t entry_offset_;
+// The return address column for that entry.
+unsigned return_address_;
+};
+} // namespace google_breakpad
+#endif // COMMON_LINUX_DWARF_CFI_TO_MODULE_H

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comparison: toolkit/crashreporter/google-breakpad/src/common/dwarf_cfi_to_module.h

toolkit/crashreporter/google-breakpad/src/common/dwarf_cfi_to_module.h