From 4969cfc6477c56afb2d4f2f6c1733c3120690b6d Mon Sep 17 00:00:00 2001 From: "jimblandy@gmail.com" Date: Tue, 15 Dec 2009 17:06:21 +0000 Subject: Issue 39002: Breakpad DWARF parser: Move DWARF parser to platform-independent directory. Move the DWARF parser, and the functioninfo.cc DWARF consumer, from src/common/mac/dwarf to src/commmon/dwarf, so that it can be shared between the Mac and Linux dumpers. Fix up #include directives, multiple inclusion protection macros, and Xcode build files. a=jimblandy, r=nealsid git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@446 4c0a9323-5329-0410-9bdc-e9ce6186880e --- src/common/dwarf/functioninfo.cc | 231 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 231 insertions(+) create mode 100644 src/common/dwarf/functioninfo.cc (limited to 'src/common/dwarf/functioninfo.cc') diff --git a/src/common/dwarf/functioninfo.cc b/src/common/dwarf/functioninfo.cc new file mode 100644 index 00000000..1957153e --- /dev/null +++ b/src/common/dwarf/functioninfo.cc @@ -0,0 +1,231 @@ +// Copyright 2006 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 + +#include +#include +#include + +#include "common/dwarf/functioninfo.h" + +#include "common/dwarf/bytereader.h" + + +namespace dwarf2reader { + +// Given an offset value, its form, and the base offset of the +// compilation unit containing this value, return an absolute offset +// within the .debug_info section. +uint64 GetAbsoluteOffset(uint64 offset, + enum DwarfForm form, + uint64 compilation_unit_base) { + switch (form) { + case DW_FORM_ref1: + case DW_FORM_ref2: + case DW_FORM_ref4: + case DW_FORM_ref8: + case DW_FORM_ref_udata: + return offset + compilation_unit_base; + case DW_FORM_ref_addr: + default: + return offset; + } +} + +CULineInfoHandler::CULineInfoHandler(vector* files, + vector* 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, uint32 file_num, + uint32 line_num, uint32 column_num) { + if (file_num < files_->size()) { + linemap_->insert(make_pair(address, 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, + const AttributeList& attrs) { + 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(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 :-( + auto_ptr 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; + 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. + uint64 abs_offset = GetAbsoluteOffset(data, form, current_compilation_unit_offset_); + FunctionMap::iterator iter = offset_to_funcinfo_->find(abs_offset); + 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", abs_offset, offset); + } + break; + } + default: + break; + } + } +} + +void CUFunctionInfoHandler::EndDIE(uint64 offset) { + if (current_function_info_ && current_function_info_->lowpc) + address_to_funcinfo_->insert(make_pair(current_function_info_->lowpc, + current_function_info_)); +} + +} // namespace dwarf2reader -- cgit v1.2.1