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Diffstat (limited to 'toolkit/crashreporter/google-breakpad/src/common/stabs_to_module.h')
-rw-r--r-- | toolkit/crashreporter/google-breakpad/src/common/stabs_to_module.h | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/common/stabs_to_module.h b/toolkit/crashreporter/google-breakpad/src/common/stabs_to_module.h new file mode 100644 index 000000000..5e04fa792 --- /dev/null +++ b/toolkit/crashreporter/google-breakpad/src/common/stabs_to_module.h @@ -0,0 +1,143 @@ +// -*- 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 StabsToModule class, which receives +// STABS debugging information from a parser and adds it to a Breakpad +// symbol file. + +#ifndef BREAKPAD_COMMON_STABS_TO_MODULE_H_ +#define BREAKPAD_COMMON_STABS_TO_MODULE_H_ + +#include <stdint.h> + +#include <string> +#include <vector> + +#include "common/module.h" +#include "common/stabs_reader.h" +#include "common/using_std_string.h" + +namespace google_breakpad { + +using std::vector; + +// A StabsToModule 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 StabsToModule thus acts as +// the bridge between STABS and Breakpad data. +// When processing Darwin Mach-O files, this also receives public linker +// symbols, like those found in system libraries. +class StabsToModule: public google_breakpad::StabsHandler { + public: + // Receive parsed debugging information from a StabsReader, and + // store it all in MODULE. + StabsToModule(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) { } + ~StabsToModule(); + + // 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); + bool Extern(const string &name, uint64_t address); + 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 // BREAKPAD_COMMON_STABS_TO_MODULE_H_ |