The Tor Browser: toolkit/crashreporter/google-breakpad/src/common/dwarf/functioninfo.cc@6474c204b198 (annotated)

toolkit/crashreporter/google-breakpad/src/common/dwarf/functioninfo.cc@6474c204b198 (annotated)

toolkit/crashreporter/google-breakpad/src/common/dwarf/functioninfo.cc

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 // 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.
 // This is a client for the dwarf2reader to extract function and line
 // information from the debug info.
 #include <assert.h>
 #include <limits.h>
 #include <stdio.h>
 #include <map>
 #include <queue>
 #include <vector>
 #include <memory>
 #include "common/dwarf/functioninfo.h"
 #include "common/dwarf/bytereader.h"
 #include "common/using_std_string.h"
 namespace dwarf2reader {
 CULineInfoHandler::CULineInfoHandler(std::vector<SourceFileInfo>* files,
                                      std::vector<string>* dirs,
                                      LineMap* linemap):linemap_(linemap),
                                                        files_(files),
                                                        dirs_(dirs) {
   // The dirs and files are 1 indexed, so just make sure we put
   // nothing in the 0 vector.
   assert(dirs->size() == 0);
   assert(files->size() == 0);
   dirs->push_back("");
   SourceFileInfo s;
   s.name = "";
   s.lowpc = ULLONG_MAX;
   files->push_back(s);
 }
 void CULineInfoHandler::DefineDir(const string& name, uint32 dir_num) {
   // These should never come out of order, actually
   assert(dir_num == dirs_->size());
   dirs_->push_back(name);
 }
 void CULineInfoHandler::DefineFile(const string& name,
                                    int32 file_num, uint32 dir_num,
                                    uint64 mod_time, uint64 length) {
   assert(dir_num >= 0);
   assert(dir_num < dirs_->size());
   // These should never come out of order, actually.
   if (file_num == (int32)files_->size() || file_num == -1) {
     string dir = dirs_->at(dir_num);
     SourceFileInfo s;
     s.lowpc = ULLONG_MAX;
     if (dir == "") {
       s.name = name;
     } else {
       s.name = dir + "/" + name;
     }
     files_->push_back(s);
   } else {
     fprintf(stderr, "error in DefineFile");
   }
 }
 void CULineInfoHandler::AddLine(uint64 address, uint64 length, uint32 file_num,
                                 uint32 line_num, uint32 column_num) {
   if (file_num < files_->size()) {
     linemap_->insert(
         std::make_pair(address,
                        std::make_pair(files_->at(file_num).name.c_str(),
                                       line_num)));
     if(address < files_->at(file_num).lowpc) {
       files_->at(file_num).lowpc = address;
     }
   } else {
     fprintf(stderr,"error in AddLine");
   }
 }
 bool CUFunctionInfoHandler::StartCompilationUnit(uint64 offset,
                                                  uint8 address_size,
                                                  uint8 offset_size,
                                                  uint64 cu_length,
                                                  uint8 dwarf_version) {
   current_compilation_unit_offset_ = offset;
   return true;
 }
 // For function info, we only care about subprograms and inlined
 // subroutines. For line info, the DW_AT_stmt_list lives in the
 // compile unit tag.
 bool CUFunctionInfoHandler::StartDIE(uint64 offset, enum DwarfTag tag) {
   switch (tag) {
     case DW_TAG_subprogram:
     case DW_TAG_inlined_subroutine: {
       current_function_info_ = new FunctionInfo;
       current_function_info_->lowpc = current_function_info_->highpc = 0;
       current_function_info_->name = "";
       current_function_info_->line = 0;
       current_function_info_->file = "";
       offset_to_funcinfo_->insert(std::make_pair(offset,
                                                  current_function_info_));
     };
       // FALLTHROUGH
     case DW_TAG_compile_unit:
       return true;
     default:
       return false;
   }
   return false;
 }
 // Only care about the name attribute for functions
 void CUFunctionInfoHandler::ProcessAttributeString(uint64 offset,
                                                    enum DwarfAttribute attr,
                                                    enum DwarfForm form,
                                                    const string &data) {
   if (current_function_info_) {
     if (attr == DW_AT_name)
       current_function_info_->name = data;
     else if(attr == DW_AT_MIPS_linkage_name)
       current_function_info_->mangled_name = data;
   }
 }
 void CUFunctionInfoHandler::ProcessAttributeUnsigned(uint64 offset,
                                                      enum DwarfAttribute attr,
                                                      enum DwarfForm form,
                                                      uint64 data) {
   if (attr == DW_AT_stmt_list) {
     SectionMap::const_iterator iter = sections_.find("__debug_line");
     assert(iter != sections_.end());
     // this should be a scoped_ptr but we dont' use boost :-(
     std::auto_ptr<LineInfo> lireader(new LineInfo(iter->second.first + data,
                                                   iter->second.second  - data,
                                                   reader_, linehandler_));
     lireader->Start();
   } else if (current_function_info_) {
     switch (attr) {
       case DW_AT_low_pc:
         current_function_info_->lowpc = data;
         break;
       case DW_AT_high_pc:
         current_function_info_->highpc = data;
         break;
       case DW_AT_decl_line:
         current_function_info_->line = data;
         break;
       case DW_AT_decl_file:
         current_function_info_->file = files_->at(data).name;
         break;
       default:
         break;
     }
   }
 }
 void CUFunctionInfoHandler::ProcessAttributeReference(uint64 offset,
                                                       enum DwarfAttribute attr,
                                                       enum DwarfForm form,
                                                       uint64 data) {
   if (current_function_info_) {
     switch (attr) {
       case DW_AT_specification: {
         // Some functions have a "specification" attribute
         // which means they were defined elsewhere. The name
         // attribute is not repeated, and must be taken from
         // the specification DIE. Here we'll assume that
         // any DIE referenced in this manner will already have
         // been seen, but that's not really required by the spec.
         FunctionMap::iterator iter = offset_to_funcinfo_->find(data);
         if (iter != offset_to_funcinfo_->end()) {
           current_function_info_->name = iter->second->name;
           current_function_info_->mangled_name = iter->second->mangled_name;
         } else {
           // If you hit this, this code probably needs to be rewritten.
           fprintf(stderr, "Error: DW_AT_specification was seen before the referenced DIE! (Looking for DIE at offset %08llx, in DIE at offset %08llx)\n", data, offset);
         }
         break;
       }
       default:
         break;
     }
   }
 }
 void CUFunctionInfoHandler::EndDIE(uint64 offset) {
   if (current_function_info_ && current_function_info_->lowpc)
     address_to_funcinfo_->insert(std::make_pair(current_function_info_->lowpc,
                                                 current_function_info_));
 }
 }  // namespace dwarf2reader

The Tor Browser / annotate

toolkit/crashreporter/google-breakpad/src/common/dwarf/functioninfo.cc@6474c204b198 (annotated)

toolkit/crashreporter/google-breakpad/src/common/dwarf/functioninfo.cc