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Diffstat (limited to 'src/common/linux/dwarf_cu_to_module.h')
| -rw-r--r-- | src/common/linux/dwarf_cu_to_module.h | 272 |
1 files changed, 0 insertions, 272 deletions
diff --git a/src/common/linux/dwarf_cu_to_module.h b/src/common/linux/dwarf_cu_to_module.h deleted file mode 100644 index 8d8a0b2c..00000000 --- a/src/common/linux/dwarf_cu_to_module.h +++ /dev/null @@ -1,272 +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> - -// Add DWARF debugging information to a Breakpad symbol file. This -// file defines the DwarfCUToModule class, which accepts parsed DWARF -// data and populates a google_breakpad::Module with the results; the -// Module can then write its contents as a Breakpad symbol file. - -#ifndef COMMON_LINUX_DWARF_CU_TO_MODULE_H__ -#define COMMON_LINUX_DWARF_CU_TO_MODULE_H__ - -#include <string> - -#include <elf.h> -#include <link.h> -#include "common/linux/language.h" -#include "common/linux/module.h" -#include "common/dwarf/bytereader.h" -#include "common/dwarf/dwarf2diehandler.h" -#include "common/dwarf/dwarf2reader.h" - -namespace google_breakpad { - -using dwarf2reader::AttributeList; -using dwarf2reader::DwarfAttribute; -using dwarf2reader::DwarfForm; -using dwarf2reader::DwarfLanguage; -using dwarf2reader::DwarfTag; - -// Populate a google_breakpad::Module with DWARF debugging information. -// -// An instance of this class can be provided as a handler to a -// dwarf2reader::CompilationUnit DWARF parser. The handler uses the -// results of parsing to populate a google_breakpad::Module with -// source file, function, and source line information. -class DwarfCUToModule: public dwarf2reader::RootDIEHandler { - struct FilePrivate; - public: - - // Information global to the DWARF-bearing file we are processing, - // for use by DwarfCUToModule. Each DwarfCUToModule instance deals - // with a single compilation unit within the file, but information - // global to the whole file is held here. The client is responsible - // for filling it in appropriately (except for the 'file_private' - // field, which the constructor and destructor take care of), and - // then providing it to the DwarfCUToModule instance for each - // compilation unit we process in that file. - struct FileContext { - FileContext(const string &filename_arg, Module *module_arg); - ~FileContext(); - - // The name of this file, for use in error messages. - string filename; - - // A map of this file's sections, used for finding other DWARF - // sections that the .debug_info section may refer to. - dwarf2reader::SectionMap section_map; - - // The Module to which we're contributing definitions. - Module *module; - - // Inter-compilation unit data used internally by the handlers. - FilePrivate *file_private; - }; - - // An abstract base class for functors that handle DWARF line data - // for DwarfCUToModule. DwarfCUToModule could certainly just use - // dwarf2reader::LineInfo itself directly, but decoupling things - // this way makes unit testing a little easier. - class LineToModuleFunctor { - public: - LineToModuleFunctor() { } - virtual ~LineToModuleFunctor() { } - - // Populate MODULE and LINES with source file names and code/line - // mappings, given a pointer to some DWARF line number data - // PROGRAM, and an overestimate of its size. Add no zero-length - // lines to LINES. - virtual void operator()(const char *program, uint64 length, - Module *module, vector<Module::Line> *lines) = 0; - }; - - // The interface DwarfCUToModule uses to report warnings. The member - // function definitions for this class write messages to stderr, but - // you can override them if you'd like to detect or report these - // conditions yourself. - class WarningReporter { - public: - // Warn about problems in the DWARF file FILENAME, in the - // compilation unit at OFFSET. - WarningReporter(const string &filename, uint64 cu_offset) - : filename_(filename), cu_offset_(cu_offset), printed_cu_header_(false), - printed_unpaired_header_(false), - uncovered_warnings_enabled_(false) { } - virtual ~WarningReporter() { } - - // Set the name of the compilation unit we're processing to NAME. - virtual void SetCUName(const string &name) { cu_name_ = name; } - - // Accessor and setter for uncovered_warnings_enabled_. - // UncoveredFunction and UncoveredLine only report a problem if that is - // true. By default, these warnings are disabled, because those - // conditions occur occasionally in healthy code. - virtual bool uncovered_warnings_enabled() const { - return uncovered_warnings_enabled_; - } - virtual void set_uncovered_warnings_enabled(bool value) { - uncovered_warnings_enabled_ = value; - } - - // A DW_AT_specification in the DIE at OFFSET refers to a DIE we - // haven't processed yet, or that wasn't marked as a declaration, - // at TARGET. - virtual void UnknownSpecification(uint64 offset, uint64 target); - - // A DW_AT_abstract_origin in the DIE at OFFSET refers to a DIE we - // haven't processed yet, or that wasn't marked as inline, at TARGET. - virtual void UnknownAbstractOrigin(uint64 offset, uint64 target); - - // We were unable to find the DWARF section named SECTION_NAME. - virtual void MissingSection(const string §ion_name); - - // The CU's DW_AT_stmt_list offset OFFSET is bogus. - virtual void BadLineInfoOffset(uint64 offset); - - // FUNCTION includes code covered by no line number data. - virtual void UncoveredFunction(const Module::Function &function); - - // Line number NUMBER in LINE_FILE, of length LENGTH, includes code - // covered by no function. - virtual void UncoveredLine(const Module::Line &line); - - protected: - string filename_; - uint64 cu_offset_; - string cu_name_; - bool printed_cu_header_; - bool printed_unpaired_header_; - bool uncovered_warnings_enabled_; - - private: - // Print a per-CU heading, once. - void CUHeading(); - // Print an unpaired function/line heading, once. - void UncoveredHeading(); - }; - - // Create a DWARF debugging info handler for a compilation unit - // within FILE_CONTEXT. This uses information received from the - // dwarf2reader::CompilationUnit DWARF parser to populate - // FILE_CONTEXT->module. Use LINE_READER to handle the compilation - // unit's line number data. Use REPORTER to report problems with the - // data we find. - DwarfCUToModule(FileContext *file_context, - LineToModuleFunctor *line_reader, - WarningReporter *reporter); - ~DwarfCUToModule(); - - void ProcessAttributeSigned(enum DwarfAttribute attr, - enum DwarfForm form, - int64 data); - void ProcessAttributeUnsigned(enum DwarfAttribute attr, - enum DwarfForm form, - uint64 data); - void ProcessAttributeString(enum DwarfAttribute attr, - enum DwarfForm form, - const string &data); - bool EndAttributes(); - DIEHandler *FindChildHandler(uint64 offset, enum DwarfTag tag, - const AttributeList &attrs); - - // Assign all our source Lines to the Functions that cover their - // addresses, and then add them to module_. - void Finish(); - - bool StartCompilationUnit(uint64 offset, uint8 address_size, - uint8 offset_size, uint64 cu_length, - uint8 dwarf_version); - bool StartRootDIE(uint64 offset, enum DwarfTag tag, - const AttributeList& attrs); - - private: - - // Used internally by the handler. Full definitions are in - // dwarf_cu_to_module.cc. - struct FilePrivate; - struct Specification; - struct CUContext; - struct DIEContext; - class GenericDIEHandler; - class FuncHandler; - class NamedScopeHandler; - - // A map from section offsets to specifications. - typedef map<uint64, Specification> SpecificationByOffset; - - // Set this compilation unit's source language to LANGUAGE. - void SetLanguage(DwarfLanguage language); - - // Read source line information at OFFSET in the .debug_line - // section. Record source files in module_, but record source lines - // in lines_; we apportion them to functions in - // AssignLinesToFunctions. - void ReadSourceLines(uint64 offset); - - // Assign the lines in lines_ to the individual line lists of the - // functions in functions_. (DWARF line information maps an entire - // compilation unit at a time, and gives no indication of which - // lines belong to which functions, beyond their addresses.) - void AssignLinesToFunctions(); - - // The only reason cu_context_ and child_context_ are pointers is - // that we want to keep their definitions private to - // dwarf_cu_to_module.cc, instead of listing them all here. They are - // owned by this DwarfCUToModule: the constructor sets them, and the - // destructor deletes them. - - // The functor to use to handle line number data. - LineToModuleFunctor *line_reader_; - - // This compilation unit's context. - CUContext *cu_context_; - - // A context for our children. - DIEContext *child_context_; - - // True if this compilation unit has source line information. - bool has_source_line_info_; - - // The offset of this compilation unit's line number information in - // the .debug_line section. - uint64 source_line_offset_; - - // The line numbers we have seen thus far. We accumulate these here - // during parsing. Then, in Finish, we call AssignLinesToFunctions - // to dole them out to the appropriate functions. - vector<Module::Line> lines_; -}; - -} // namespace google_breakpad - -#endif // COMMON_LINUX_DWARF_CU_TO_MODULE_H__ |