| // -*- 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> |
| |
| // dump_stabs.h: Define the DumpStabsHandler class, which receives |
| // STABS debugging information from a parser and adds it to a Breakpad |
| // symbol file. |
| |
| #ifndef COMMON_LINUX_DUMP_STABS_H__ |
| #define COMMON_LINUX_DUMP_STABS_H__ |
| |
| #include <stdint.h> |
| |
| #include <string> |
| #include <vector> |
| |
| #include "common/module.h" |
| #include "common/stabs_reader.h" |
| |
| namespace google_breakpad { |
| |
| using std::string; |
| using std::vector; |
| |
| // A DumpStabsHandler is a handler that receives parsed STABS |
| // debugging information from a StabsReader, and uses that to populate |
| // a Module. (All classes are in the google_breakpad namespace.) A |
| // Module represents the contents of a Breakpad symbol file, and knows |
| // how to write itself out as such. A DumpStabsHandler thus acts as |
| // the bridge between STABS and Breakpad data. |
| class DumpStabsHandler: public google_breakpad::StabsHandler { |
| public: |
| // Receive parsed debugging information from a StabsReader, and |
| // store it all in MODULE. |
| DumpStabsHandler(Module *module) : |
| module_(module), |
| in_compilation_unit_(false), |
| comp_unit_base_address_(0), |
| current_function_(NULL), |
| current_source_file_(NULL), |
| current_source_file_name_(NULL) { } |
| |
| // The standard StabsHandler virtual member functions. |
| bool StartCompilationUnit(const char *name, uint64_t address, |
| const char *build_directory); |
| bool EndCompilationUnit(uint64_t address); |
| bool StartFunction(const string &name, uint64_t address); |
| bool EndFunction(uint64_t address); |
| bool Line(uint64_t address, const char *name, int number); |
| void Warning(const char *format, ...); |
| |
| // Do any final processing necessary to make module_ contain all the |
| // data provided by the STABS reader. |
| // |
| // Because STABS does not provide reliable size information for |
| // functions and lines, we need to make a pass over the data after |
| // processing all the STABS to compute those sizes. We take care of |
| // that here. |
| void Finalize(); |
| |
| private: |
| |
| // An arbitrary, but very large, size to use for functions whose |
| // size we can't compute properly. |
| static const uint64_t kFallbackSize = 0x10000000; |
| |
| // The module we're contributing debugging info to. |
| Module *module_; |
| |
| // The functions we've generated so far. We don't add these to |
| // module_ as we parse them. Instead, we wait until we've computed |
| // their ending address, and their lines' ending addresses. |
| // |
| // We could just stick them in module_ from the outset, but if |
| // module_ already contains data gathered from other debugging |
| // formats, that would complicate the size computation. |
| vector<Module::Function *> functions_; |
| |
| // Boundary addresses. STABS doesn't necessarily supply sizes for |
| // functions and lines, so we need to compute them ourselves by |
| // finding the next object. |
| vector<Module::Address> boundaries_; |
| |
| // True if we are currently within a compilation unit: we have gotten a |
| // StartCompilationUnit call, but no matching EndCompilationUnit call |
| // yet. We use this for sanity checks. |
| bool in_compilation_unit_; |
| |
| // The base address of the current compilation unit. We use this to |
| // recognize functions we should omit from the symbol file. (If you |
| // know the details of why we omit these, please patch this |
| // comment.) |
| Module::Address comp_unit_base_address_; |
| |
| // The function we're currently contributing lines to. |
| Module::Function *current_function_; |
| |
| // The last Module::File we got a line number in. |
| Module::File *current_source_file_; |
| |
| // The pointer in the .stabstr section of the name that |
| // current_source_file_ is built from. This allows us to quickly |
| // recognize when the current line is in the same file as the |
| // previous one (which it usually is). |
| const char *current_source_file_name_; |
| }; |
| |
| } // namespace google_breakpad |
| |
| #endif // COMMON_LINUX_DUMP_STABS_H__ |