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Diffstat (limited to 'toolkit/crashreporter/google-breakpad/src/common/stabs_to_module.cc')
-rw-r--r-- | toolkit/crashreporter/google-breakpad/src/common/stabs_to_module.cc | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/common/stabs_to_module.cc b/toolkit/crashreporter/google-breakpad/src/common/stabs_to_module.cc new file mode 100644 index 000000000..0a83cf21c --- /dev/null +++ b/toolkit/crashreporter/google-breakpad/src/common/stabs_to_module.cc @@ -0,0 +1,197 @@ +// 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(Demangle(name), 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(address); + // 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; + } + 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 |