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

toolkit/crashreporter/google-breakpad/src/common/stabs_to_module.cc@b8a032363ba2 (annotated)

toolkit/crashreporter/google-breakpad/src/common/stabs_to_module.cc

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 // 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>
 // dump_stabs.cc --- implement the StabsToModule class.
 #include <assert.h>
 #include <cxxabi.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <algorithm>
 #include "common/stabs_to_module.h"
 #include "common/using_std_string.h"
 namespace google_breakpad {
 // Demangle using abi call.
 // Older GCC may not support it.
 static string Demangle(const string &mangled) {
   int status = 0;
   char *demangled = abi::__cxa_demangle(mangled.c_str(), NULL, NULL, &status);
   if (status == 0 && demangled != NULL) {
     string str(demangled);
     free(demangled);
     return str;
   }
   return string(mangled);
 }
 StabsToModule::~StabsToModule() {
   // Free any functions we've accumulated but not added to the module.
   for (vector<Module::Function *>::const_iterator func_it = functions_.begin();
        func_it != functions_.end(); func_it++)
     delete *func_it;
   // Free any function that we're currently within.
   delete current_function_;
 }
 bool StabsToModule::StartCompilationUnit(const char *name, uint64_t address,
                                          const char *build_directory) {
   assert(!in_compilation_unit_);
   in_compilation_unit_ = true;
   current_source_file_name_ = name;
   current_source_file_ = module_->FindFile(name);
   comp_unit_base_address_ = address;
   boundaries_.push_back(static_cast<Module::Address>(address));
   return true;
 }
 bool StabsToModule::EndCompilationUnit(uint64_t address) {
   assert(in_compilation_unit_);
   in_compilation_unit_ = false;
   comp_unit_base_address_ = 0;
   current_source_file_ = NULL;
   current_source_file_name_ = NULL;
   if (address)
     boundaries_.push_back(static_cast<Module::Address>(address));
   return true;
 }
 bool StabsToModule::StartFunction(const string &name,
                                   uint64_t address) {
   assert(!current_function_);
   Module::Function *f = new Module::Function;
   f->name = Demangle(name);
   f->address = address;
   f->size = 0;           // We compute this in StabsToModule::Finalize().
   f->parameter_size = 0; // We don't provide this information.
   current_function_ = f;
   boundaries_.push_back(static_cast<Module::Address>(address));
   return true;
 }
 bool StabsToModule::EndFunction(uint64_t address) {
   assert(current_function_);
   // Functions in this compilation unit should have address bigger
   // than the compilation unit's starting address.  There may be a lot
   // of duplicated entries for functions in the STABS data. We will
   // count on the Module to remove the duplicates.
   if (current_function_->address >= comp_unit_base_address_)
     functions_.push_back(current_function_);
   else
     delete current_function_;
   current_function_ = NULL;
   if (address)
     boundaries_.push_back(static_cast<Module::Address>(address));
   return true;
 }
 bool StabsToModule::Line(uint64_t address, const char *name, int number) {
   assert(current_function_);
   assert(current_source_file_);
   if (name != current_source_file_name_) {
     current_source_file_ = module_->FindFile(name);
     current_source_file_name_ = name;
   }
   Module::Line line;
   line.address = address;
   line.size = 0;  // We compute this in StabsToModule::Finalize().
   line.file = current_source_file_;
   line.number = number;
   current_function_->lines.push_back(line);
   return true;
 }
 bool StabsToModule::Extern(const string &name, uint64_t address) {
   Module::Extern *ext = new Module::Extern;
   // Older libstdc++ demangle implementations can crash on unexpected
   // input, so be careful about what gets passed in.
   if (name.compare(0, 3, "__Z") == 0) {
     ext->name = Demangle(name.substr(1));
   } else if (name[0] == '_') {
     ext->name = name.substr(1);
   } else {
     ext->name = name;
   }
   ext->address = address;
   module_->AddExtern(ext);
   return true;
 }
 void StabsToModule::Warning(const char *format, ...) {
   va_list args;
   va_start(args, format);
   vfprintf(stderr, format, args);
   va_end(args);
 }
 void StabsToModule::Finalize() {
   // Sort our boundary list, so we can search it quickly.
   sort(boundaries_.begin(), boundaries_.end());
   // Sort all functions by address, just for neatness.
   sort(functions_.begin(), functions_.end(),
        Module::Function::CompareByAddress);
   for (vector<Module::Function *>::const_iterator func_it = functions_.begin();
        func_it != functions_.end();
        func_it++) {
     Module::Function *f = *func_it;
     // Compute the function f's size.
     vector<Module::Address>::const_iterator boundary
         = std::upper_bound(boundaries_.begin(), boundaries_.end(), f->address);
     if (boundary != boundaries_.end())
       f->size = *boundary - f->address;
     else
       // If this is the last function in the module, and the STABS
       // reader was unable to give us its ending address, then assign
       // it a bogus, very large value.  This will happen at most once
       // per module: since we've added all functions' addresses to the
       // boundary table, only one can be the last.
       f->size = kFallbackSize;
     // Compute sizes for each of the function f's lines --- if it has any.
     if (!f->lines.empty()) {
       stable_sort(f->lines.begin(), f->lines.end(),
                   Module::Line::CompareByAddress);
       vector<Module::Line>::iterator last_line = f->lines.end() - 1;
       for (vector<Module::Line>::iterator line_it = f->lines.begin();
            line_it != last_line; line_it++)
         line_it[0].size = line_it[1].address - line_it[0].address;
       // Compute the size of the last line from f's end address.
       last_line->size = (f->address + f->size) - last_line->address;
     }
   }
   // Now that everything has a size, add our functions to the module, and
   // dispose of our private list.
   module_->AddFunctions(functions_.begin(), functions_.end());
   functions_.clear();
 }
 } // namespace google_breakpad

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toolkit/crashreporter/google-breakpad/src/common/stabs_to_module.cc@b8a032363ba2 (annotated)

toolkit/crashreporter/google-breakpad/src/common/stabs_to_module.cc