mirror of
https://github.com/tomahawk-player/tomahawk.git
synced 2025-08-26 07:14:47 +02:00
Update breakpad to make it work with MinGW
This commit is contained in:
Dominik Schmidt
732
thirdparty/breakpad/common/pecoff/dump_symbols-inl.h
vendored
Normal file
732
thirdparty/breakpad/common/pecoff/dump_symbols-inl.h
vendored
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@@ -0,0 +1,732 @@
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// Copyright (c) 2011 Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
|
||||
// met:
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//
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||||
// * Redistributions of source code must retain the above copyright
|
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// 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.
|
||||
//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
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// "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
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||||
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// dump_symbols-inl.h: implement google_breakpad::WriteSymbolFile:
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// Find all the debugging info in a file and dump it as a Breakpad symbol file.
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#ifndef COMMON_PECOFF_DUMP_SYMBOLS_INL_H
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#define COMMON_PECOFF_DUMP_SYMBOLS_INL_H
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifndef _WIN32
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#include <sys/mman.h>
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#endif
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#include <sys/stat.h>
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#include <unistd.h>
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#include <libgen.h>
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#include <iostream>
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#include <set>
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#include <utility>
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#include <vector>
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#include "common/dwarf/bytereader-inl.h"
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#include "common/dwarf/dwarf2diehandler.h"
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#include "common/dwarf_cfi_to_module.h"
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#include "common/dwarf_cu_to_module.h"
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#include "common/dwarf_line_to_module.h"
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#include "common/module.h"
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#include "common/scoped_ptr.h"
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#ifndef NO_STABS_SUPPORT
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#include "common/stabs_reader.h"
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#include "common/stabs_to_module.h"
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#endif
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#include "common/using_std_string.h"
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// This namespace contains helper functions.
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namespace {
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using google_breakpad::DumpOptions;
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using google_breakpad::DwarfCFIToModule;
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using google_breakpad::DwarfCUToModule;
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using google_breakpad::DwarfLineToModule;
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using google_breakpad::Module;
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#ifndef NO_STABS_SUPPORT
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using google_breakpad::StabsToModule;
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#endif
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using google_breakpad::scoped_ptr;
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//
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// FDWrapper
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//
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// Wrapper class to make sure opened file is closed.
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//
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class FDWrapper {
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public:
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explicit FDWrapper(int fd) :
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fd_(fd) {}
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~FDWrapper() {
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if (fd_ != -1)
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close(fd_);
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}
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int get() {
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return fd_;
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}
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int release() {
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int fd = fd_;
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fd_ = -1;
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return fd;
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}
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private:
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int fd_;
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};
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//
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// MmapWrapper
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//
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// Wrapper class to make sure mapped regions are unmapped.
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//
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class MmapWrapper {
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public:
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MmapWrapper() : is_set_(false) {}
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~MmapWrapper() {
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if (is_set_ && base_ != NULL) {
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assert(size_ > 0);
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#ifndef _WIN32
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munmap(base_, size_);
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#else
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UnmapViewOfFile(base_);
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CloseHandle(hMap_);
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#endif
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}
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}
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void *set(int obj_fd, size_t mapped_size) {
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#ifndef _WIN32
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void *mapped_address = mmap(NULL, mapped_size,
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PROT_READ | PROT_WRITE, MAP_PRIVATE, obj_fd, 0);
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if (mapped_address == MAP_FAILED)
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return NULL;
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#else
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HANDLE h = (HANDLE)_get_osfhandle(obj_fd);
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hMap_ = CreateFileMapping(h, NULL, PAGE_READONLY,0, 0, NULL);
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// XXX: should also use SEC_IMAGE_NO_EXECUTE on Windows 6.2 or later
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if (!hMap_) {
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return NULL;
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}
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void *mapped_address = MapViewOfFile(hMap_, FILE_MAP_READ, 0, 0, 0);
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if (!mapped_address) {
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CloseHandle(hMap_);
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return NULL;
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}
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#endif
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is_set_ = true;
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base_ = mapped_address;
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size_ = mapped_size;
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return mapped_address;
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}
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void release() {
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assert(is_set_);
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is_set_ = false;
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base_ = NULL;
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size_ = 0;
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}
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private:
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bool is_set_;
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void *base_;
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size_t size_;
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#ifdef _WIN32
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HANDLE hMap_;
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#endif
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};
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#ifndef NO_STABS_SUPPORT
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template<typename ObjectFileReader>
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bool LoadStabs(const typename ObjectFileReader::ObjectFileBase header,
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const typename ObjectFileReader::Section stab_section,
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const typename ObjectFileReader::Section stabstr_section,
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const bool big_endian,
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Module* module) {
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// A callback object to handle data from the STABS reader.
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StabsToModule handler(module);
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// Find the addresses of the STABS data, and create a STABS reader object.
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// On Linux, STABS entries always have 32-bit values, regardless of the
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// address size of the architecture whose code they're describing, and
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// the strings are always "unitized".
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const uint8_t* stabs = ObjectFileReader::GetSectionPointer(header,
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stab_section);
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const uint8_t* stabstr = ObjectFileReader::GetSectionPointer(header,
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stabstr_section);
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google_breakpad::StabsReader reader(stabs,
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ObjectFileReader::GetSectionSize(header, stab_section),
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stabstr,
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ObjectFileReader::GetSectionSize(header, stabstr_section),
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big_endian, 4, true, &handler);
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// Read the STABS data, and do post-processing.
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if (!reader.Process())
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return false;
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handler.Finalize();
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return true;
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}
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#endif // NO_STABS_SUPPORT
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// A line-to-module loader that accepts line number info parsed by
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// dwarf2reader::LineInfo and populates a Module and a line vector
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// with the results.
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class DumperLineToModule: public DwarfCUToModule::LineToModuleHandler {
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public:
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// Create a line-to-module converter using BYTE_READER.
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explicit DumperLineToModule(dwarf2reader::ByteReader *byte_reader)
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: byte_reader_(byte_reader) { }
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void StartCompilationUnit(const string& compilation_dir) {
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compilation_dir_ = compilation_dir;
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}
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void ReadProgram(const char *program, uint64 length,
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Module *module, std::vector<Module::Line> *lines) {
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DwarfLineToModule handler(module, compilation_dir_, lines);
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dwarf2reader::LineInfo parser(program, length, byte_reader_, &handler);
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parser.Start();
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}
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private:
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string compilation_dir_;
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dwarf2reader::ByteReader *byte_reader_;
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};
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template<typename ObjectFileReader>
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bool LoadDwarf(const string& dwarf_filename,
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const typename ObjectFileReader::ObjectFileBase header,
|
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const bool big_endian,
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bool handle_inter_cu_refs,
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Module* module) {
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typedef typename ObjectFileReader::Section Shdr;
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const dwarf2reader::Endianness endianness = big_endian ?
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dwarf2reader::ENDIANNESS_BIG : dwarf2reader::ENDIANNESS_LITTLE;
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dwarf2reader::ByteReader byte_reader(endianness);
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|
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// Construct a context for this file.
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DwarfCUToModule::FileContext file_context(dwarf_filename,
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module,
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handle_inter_cu_refs);
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|
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// Build a map of the file's sections.
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int num_sections = ObjectFileReader::GetNumberOfSections(header);
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for (int i = 0; i < num_sections; ++i) {
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const Shdr section = ObjectFileReader::FindSectionByIndex(header, i);
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string name = ObjectFileReader::GetSectionName(header, section);
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const char* contents = reinterpret_cast<const char *>(ObjectFileReader::GetSectionPointer(header, section));
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file_context.AddSectionToSectionMap(name, contents,
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ObjectFileReader::GetSectionSize(header, section));
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}
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// Parse all the compilation units in the .debug_info section.
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DumperLineToModule line_to_module(&byte_reader);
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dwarf2reader::SectionMap::const_iterator debug_info_entry =
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file_context.section_map().find(".debug_info");
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assert(debug_info_entry != file_context.section_map().end());
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const std::pair<const char*, uint64>& debug_info_section =
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debug_info_entry->second;
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// This should never have been called if the file doesn't have a
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// .debug_info section.
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assert(debug_info_section.first);
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uint64 debug_info_length = debug_info_section.second;
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for (uint64 offset = 0; offset < debug_info_length;) {
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// Make a handler for the root DIE that populates MODULE with the
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// data that was found.
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DwarfCUToModule::WarningReporter reporter(dwarf_filename, offset);
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DwarfCUToModule root_handler(&file_context, &line_to_module, &reporter);
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// Make a Dwarf2Handler that drives the DIEHandler.
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dwarf2reader::DIEDispatcher die_dispatcher(&root_handler);
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// Make a DWARF parser for the compilation unit at OFFSET.
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dwarf2reader::CompilationUnit reader(file_context.section_map(),
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offset,
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&byte_reader,
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&die_dispatcher);
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// Process the entire compilation unit; get the offset of the next.
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offset += reader.Start();
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}
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return true;
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}
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// Fill REGISTER_NAMES with the register names appropriate to the
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// machine architecture, indexed by the register
|
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// numbers used in DWARF call frame information. Return true on
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// success, or false if HEADER's machine architecture is not
|
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// supported.
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bool DwarfCFIRegisterNames(const char *architecture,
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std::vector<string>* register_names) {
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if (strcmp(architecture, "x86" ) == 0)
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*register_names = DwarfCFIToModule::RegisterNames::I386();
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else if (strcmp(architecture, "arm" ) == 0)
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*register_names = DwarfCFIToModule::RegisterNames::ARM();
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else if (strcmp(architecture, "mips" ) == 0)
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*register_names = DwarfCFIToModule::RegisterNames::MIPS();
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else if (strcmp(architecture, "x86_64" ) == 0)
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*register_names = DwarfCFIToModule::RegisterNames::X86_64();
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else
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return false;
|
||||
|
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return true;
|
||||
}
|
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|
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template<typename ObjectFileReader>
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||||
bool LoadDwarfCFI(const string& dwarf_filename,
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||||
const typename ObjectFileReader::ObjectFileBase header,
|
||||
const char* section_name,
|
||||
const typename ObjectFileReader::Section section,
|
||||
const bool eh_frame,
|
||||
const typename ObjectFileReader::Section got_section,
|
||||
const typename ObjectFileReader::Section text_section,
|
||||
const bool big_endian,
|
||||
Module* module) {
|
||||
// Find the appropriate set of register names for this file's
|
||||
// architecture.
|
||||
const char *architecture = ObjectFileReader::Architecture(header);
|
||||
std::vector<string> register_names;
|
||||
if (!DwarfCFIRegisterNames(architecture, ®ister_names)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
const dwarf2reader::Endianness endianness = big_endian ?
|
||||
dwarf2reader::ENDIANNESS_BIG : dwarf2reader::ENDIANNESS_LITTLE;
|
||||
|
||||
// Find the call frame information and its size.
|
||||
const char* cfi = reinterpret_cast<const char *>(ObjectFileReader::GetSectionPointer(header, section));
|
||||
size_t cfi_size = ObjectFileReader::GetSectionSize(header, section);
|
||||
|
||||
// Plug together the parser, handler, and their entourages.
|
||||
DwarfCFIToModule::Reporter module_reporter(dwarf_filename, section_name);
|
||||
DwarfCFIToModule handler(module, register_names, &module_reporter);
|
||||
dwarf2reader::ByteReader byte_reader(endianness);
|
||||
|
||||
byte_reader.SetAddressSize(ObjectFileReader::kAddrSize);
|
||||
|
||||
// Provide the base addresses for .eh_frame encoded pointers, if
|
||||
// possible.
|
||||
byte_reader.SetCFIDataBase(ObjectFileReader::GetSectionRVA(header, section) +
|
||||
ObjectFileReader::GetLoadingAddress(header),
|
||||
cfi);
|
||||
if (got_section)
|
||||
byte_reader.SetDataBase(ObjectFileReader::GetSectionRVA(header, got_section) +
|
||||
ObjectFileReader::GetLoadingAddress(header));
|
||||
if (text_section)
|
||||
byte_reader.SetTextBase(ObjectFileReader::GetSectionRVA(header, text_section) +
|
||||
ObjectFileReader::GetLoadingAddress(header));
|
||||
|
||||
dwarf2reader::CallFrameInfo::Reporter dwarf_reporter(dwarf_filename,
|
||||
section_name);
|
||||
dwarf2reader::CallFrameInfo parser(cfi, cfi_size,
|
||||
&byte_reader, &handler, &dwarf_reporter,
|
||||
eh_frame);
|
||||
parser.Start();
|
||||
return true;
|
||||
}
|
||||
|
||||
bool LoadFile(const string& obj_file, MmapWrapper* map_wrapper,
|
||||
const void** header) {
|
||||
int obj_fd = open(obj_file.c_str(), O_RDONLY);
|
||||
if (obj_fd < 0) {
|
||||
fprintf(stderr, "Failed to open file '%s': %s\n",
|
||||
obj_file.c_str(), strerror(errno));
|
||||
return false;
|
||||
}
|
||||
FDWrapper obj_fd_wrapper(obj_fd);
|
||||
struct stat st;
|
||||
if (fstat(obj_fd, &st) != 0 && st.st_size <= 0) {
|
||||
fprintf(stderr, "Unable to fstat file '%s': %s\n",
|
||||
obj_file.c_str(), strerror(errno));
|
||||
return false;
|
||||
}
|
||||
*header = map_wrapper->set(obj_fd, st.st_size);
|
||||
if (!(*header)) {
|
||||
fprintf(stderr, "Failed to mmap file '%s': %s\n",
|
||||
obj_file.c_str(), strerror(errno));
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
// Read the .gnu_debuglink and get the debug file name. If anything goes
|
||||
// wrong, return an empty string.
|
||||
template<typename ObjectFileReader>
|
||||
string ReadDebugLink(const char* debuglink,
|
||||
size_t debuglink_size,
|
||||
const string& obj_file,
|
||||
const std::vector<string>& debug_dirs) {
|
||||
size_t debuglink_len = strlen(debuglink) + 5; // '\0' + CRC32.
|
||||
debuglink_len = 4 * ((debuglink_len + 3) / 4); // Round to nearest 4 bytes.
|
||||
|
||||
// Sanity check.
|
||||
if (debuglink_len != debuglink_size) {
|
||||
fprintf(stderr, "Mismatched .gnu_debuglink string / section size: "
|
||||
"%zx %zx\n", debuglink_len, debuglink_size);
|
||||
return "";
|
||||
}
|
||||
|
||||
bool found = false;
|
||||
int debuglink_fd = -1;
|
||||
string debuglink_path;
|
||||
std::vector<string>::const_iterator it;
|
||||
for (it = debug_dirs.begin(); it < debug_dirs.end(); ++it) {
|
||||
const string& debug_dir = *it;
|
||||
debuglink_path = debug_dir + "/" + debuglink;
|
||||
debuglink_fd = open(debuglink_path.c_str(), O_RDONLY);
|
||||
if (debuglink_fd >= 0) {
|
||||
found = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (!found) {
|
||||
fprintf(stderr, "Failed to find debug file for '%s' after trying:\n",
|
||||
obj_file.c_str());
|
||||
for (it = debug_dirs.begin(); it < debug_dirs.end(); ++it) {
|
||||
const string debug_dir = *it;
|
||||
fprintf(stderr, " %s/%s\n", debug_dir.c_str(), debuglink);
|
||||
}
|
||||
return "";
|
||||
}
|
||||
|
||||
FDWrapper debuglink_fd_wrapper(debuglink_fd);
|
||||
// TODO(thestig) check the CRC-32 at the end of the .gnu_debuglink
|
||||
// section.
|
||||
|
||||
return debuglink_path;
|
||||
}
|
||||
|
||||
//
|
||||
// LoadSymbolsInfo
|
||||
//
|
||||
// Holds the state between the two calls to LoadSymbols() in case it's necessary
|
||||
// to follow the .gnu_debuglink section and load debug information from a
|
||||
// different file.
|
||||
//
|
||||
template<typename ObjectFileReader>
|
||||
class LoadSymbolsInfo {
|
||||
public:
|
||||
typedef typename ObjectFileReader::Addr Addr;
|
||||
|
||||
explicit LoadSymbolsInfo(const std::vector<string>& dbg_dirs) :
|
||||
debug_dirs_(dbg_dirs),
|
||||
has_loading_addr_(false) {}
|
||||
|
||||
// Keeps track of which sections have been loaded so sections don't
|
||||
// accidentally get loaded twice from two different files.
|
||||
void LoadedSection(const string §ion) {
|
||||
if (loaded_sections_.count(section) == 0) {
|
||||
loaded_sections_.insert(section);
|
||||
} else {
|
||||
fprintf(stderr, "Section %s has already been loaded.\n",
|
||||
section.c_str());
|
||||
}
|
||||
}
|
||||
|
||||
// The file and linked debug file are expected to have the same preferred
|
||||
// loading address.
|
||||
void set_loading_addr(Addr addr, const string &filename) {
|
||||
if (!has_loading_addr_) {
|
||||
loading_addr_ = addr;
|
||||
loaded_file_ = filename;
|
||||
return;
|
||||
}
|
||||
|
||||
if (addr != loading_addr_) {
|
||||
fprintf(stderr,
|
||||
"file '%s' and debug file '%s' "
|
||||
"have different load addresses.\n",
|
||||
loaded_file_.c_str(), filename.c_str());
|
||||
assert(false);
|
||||
}
|
||||
}
|
||||
|
||||
// Setters and getters
|
||||
const std::vector<string>& debug_dirs() const {
|
||||
return debug_dirs_;
|
||||
}
|
||||
|
||||
string debuglink_file() const {
|
||||
return debuglink_file_;
|
||||
}
|
||||
void set_debuglink_file(string file) {
|
||||
debuglink_file_ = file;
|
||||
}
|
||||
|
||||
private:
|
||||
const std::vector<string>& debug_dirs_; // Directories in which to
|
||||
// search for the debug file.
|
||||
|
||||
string debuglink_file_; // Full path to the debug file.
|
||||
|
||||
bool has_loading_addr_; // Indicate if LOADING_ADDR_ is valid.
|
||||
|
||||
Addr loading_addr_; // Saves the preferred loading address from the
|
||||
// first call to LoadSymbols().
|
||||
|
||||
string loaded_file_; // Name of the file loaded from the first call to
|
||||
// LoadSymbols().
|
||||
|
||||
std::set<string> loaded_sections_; // Tracks the Loaded sections
|
||||
// between calls to LoadSymbols().
|
||||
};
|
||||
|
||||
template<typename ObjectFileReader>
|
||||
bool LoadSymbols(const string& obj_file,
|
||||
const bool big_endian,
|
||||
const typename ObjectFileReader::ObjectFileBase header,
|
||||
const bool read_gnu_debug_link,
|
||||
LoadSymbolsInfo<ObjectFileReader>* info,
|
||||
const DumpOptions& options,
|
||||
Module* module) {
|
||||
typedef typename ObjectFileReader::Addr Addr;
|
||||
typedef typename ObjectFileReader::Section Shdr;
|
||||
|
||||
Addr loading_addr = ObjectFileReader::GetLoadingAddress(header);
|
||||
module->SetLoadAddress(loading_addr);
|
||||
info->set_loading_addr(loading_addr, obj_file);
|
||||
|
||||
bool found_debug_info_section = false;
|
||||
bool found_usable_info = false;
|
||||
|
||||
if (options.symbol_data != ONLY_CFI) {
|
||||
#ifndef NO_STABS_SUPPORT
|
||||
// Look for STABS debugging information, and load it if present.
|
||||
const Shdr stab_section =
|
||||
ObjectFileReader::FindSectionByName(".stab", header);
|
||||
if (stab_section) {
|
||||
const Shdr stabstr_section = ObjectFileReader::FindLinkedSection(header, stab_section);
|
||||
if (stabstr_section) {
|
||||
found_debug_info_section = true;
|
||||
found_usable_info = true;
|
||||
info->LoadedSection(".stab");
|
||||
if (!LoadStabs<ObjectFileReader>(header, stab_section, stabstr_section,
|
||||
big_endian, module)) {
|
||||
fprintf(stderr, "%s: \".stab\" section found, but failed to load"
|
||||
" STABS debugging information\n", obj_file.c_str());
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif // NO_STABS_SUPPORT
|
||||
|
||||
// Look for DWARF debugging information, and load it if present.
|
||||
const Shdr dwarf_section =
|
||||
ObjectFileReader::FindSectionByName(".debug_info", header);
|
||||
if (dwarf_section) {
|
||||
found_debug_info_section = true;
|
||||
found_usable_info = true;
|
||||
info->LoadedSection(".debug_info");
|
||||
if (!LoadDwarf<ObjectFileReader>(obj_file, header, big_endian,
|
||||
options.handle_inter_cu_refs, module)) {
|
||||
fprintf(stderr, "%s: \".debug_info\" section found, but failed to load "
|
||||
"DWARF debugging information\n", obj_file.c_str());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (options.symbol_data != NO_CFI) {
|
||||
// Dwarf Call Frame Information (CFI) is actually independent from
|
||||
// the other DWARF debugging information, and can be used alone.
|
||||
const Shdr dwarf_cfi_section =
|
||||
ObjectFileReader::FindSectionByName(".debug_frame", header);
|
||||
if (dwarf_cfi_section) {
|
||||
// Ignore the return value of this function; even without call frame
|
||||
// information, the other debugging information could be perfectly
|
||||
// useful.
|
||||
info->LoadedSection(".debug_frame");
|
||||
bool result =
|
||||
LoadDwarfCFI<ObjectFileReader>(obj_file, header, ".debug_frame",
|
||||
dwarf_cfi_section, false, 0, 0, big_endian,
|
||||
module);
|
||||
found_usable_info = found_usable_info || result;
|
||||
}
|
||||
|
||||
// Linux C++ exception handling information can also provide
|
||||
// unwinding data.
|
||||
const Shdr eh_frame_section =
|
||||
ObjectFileReader::FindSectionByName(".eh_frame", header);
|
||||
if (eh_frame_section) {
|
||||
// Pointers in .eh_frame data may be relative to the base addresses of
|
||||
// certain sections. Provide those sections if present.
|
||||
const Shdr got_section =
|
||||
ObjectFileReader::FindSectionByName(".got", header);
|
||||
const Shdr text_section =
|
||||
ObjectFileReader::FindSectionByName(".text", header);
|
||||
info->LoadedSection(".eh_frame");
|
||||
// As above, ignore the return value of this function.
|
||||
bool result =
|
||||
LoadDwarfCFI<ObjectFileReader>(obj_file, header, ".eh_frame",
|
||||
eh_frame_section, true,
|
||||
got_section, text_section, big_endian, module);
|
||||
found_usable_info = found_usable_info || result;
|
||||
}
|
||||
}
|
||||
|
||||
if (!found_debug_info_section) {
|
||||
fprintf(stderr, "%s: file contains no debugging information"
|
||||
" (no \".stab\" or \".debug_info\" sections)\n",
|
||||
obj_file.c_str());
|
||||
|
||||
// Failed, but maybe there's a .gnu_debuglink section?
|
||||
if (read_gnu_debug_link) {
|
||||
const Shdr gnu_debuglink_section
|
||||
= ObjectFileReader::FindSectionByName(".gnu_debuglink", header);
|
||||
if (gnu_debuglink_section) {
|
||||
if (!info->debug_dirs().empty()) {
|
||||
const char* debuglink_contents = reinterpret_cast<const char *>
|
||||
(ObjectFileReader::GetSectionPointer(header, gnu_debuglink_section));
|
||||
string debuglink_file
|
||||
= ReadDebugLink<ObjectFileReader>(debuglink_contents,
|
||||
ObjectFileReader::GetSectionSize(header, gnu_debuglink_section),
|
||||
obj_file, info->debug_dirs());
|
||||
info->set_debuglink_file(debuglink_file);
|
||||
} else {
|
||||
fprintf(stderr, ".gnu_debuglink section found in '%s', "
|
||||
"but no debug path specified.\n", obj_file.c_str());
|
||||
}
|
||||
} else {
|
||||
fprintf(stderr, "%s does not contain a .gnu_debuglink section.\n",
|
||||
obj_file.c_str());
|
||||
}
|
||||
} else {
|
||||
if (options.symbol_data != ONLY_CFI) {
|
||||
// The caller doesn't want to consult .gnu_debuglink.
|
||||
// See if there are export symbols available.
|
||||
bool result = ObjectFileReader::ExportedSymbolsToModule(header, module);
|
||||
found_usable_info = found_usable_info || result;
|
||||
}
|
||||
|
||||
// Return true if some usable information was found, since
|
||||
// the caller doesn't want to use .gnu_debuglink.
|
||||
return found_usable_info;
|
||||
}
|
||||
|
||||
// No debug info was found, let the user try again with .gnu_debuglink
|
||||
// if present.
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
// Return the non-directory portion of FILENAME: the portion after the
|
||||
// last slash, or the whole filename if there are no slashes.
|
||||
string BaseFileName(const string &filename) {
|
||||
// Lots of copies! basename's behavior is less than ideal.
|
||||
char *c_filename = strdup(filename.c_str());
|
||||
string base = basename(c_filename);
|
||||
free(c_filename);
|
||||
return base;
|
||||
}
|
||||
|
||||
template<typename ObjectFileReader>
|
||||
bool ReadSymbolDataFromObjectFile(
|
||||
const typename ObjectFileReader::ObjectFileBase header,
|
||||
const string& obj_filename,
|
||||
const std::vector<string>& debug_dirs,
|
||||
const DumpOptions& options,
|
||||
Module** out_module) {
|
||||
|
||||
typedef typename ObjectFileReader::Section Shdr;
|
||||
|
||||
*out_module = NULL;
|
||||
|
||||
string identifier = ObjectFileReader::FileIdentifierFromMappedFile(header);
|
||||
if (identifier.empty()) {
|
||||
fprintf(stderr, "%s: unable to generate file identifier\n",
|
||||
obj_filename.c_str());
|
||||
return false;
|
||||
}
|
||||
|
||||
const char *architecture = ObjectFileReader::Architecture(header);
|
||||
if (!architecture) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Figure out what endianness this file is.
|
||||
bool big_endian;
|
||||
if (!ObjectFileReader::Endianness(header, &big_endian))
|
||||
return false;
|
||||
|
||||
string name = BaseFileName(obj_filename);
|
||||
string os = "windows";
|
||||
string id = identifier;
|
||||
|
||||
LoadSymbolsInfo<ObjectFileReader> info(debug_dirs);
|
||||
scoped_ptr<Module> module(new Module(name, os, architecture, id));
|
||||
if (!LoadSymbols<ObjectFileReader>(obj_filename, big_endian, header,
|
||||
!debug_dirs.empty(), &info,
|
||||
options, module.get())) {
|
||||
const string debuglink_file = info.debuglink_file();
|
||||
if (debuglink_file.empty())
|
||||
return false;
|
||||
|
||||
// Load debuglink file.
|
||||
fprintf(stderr, "Found debugging info in %s\n", debuglink_file.c_str());
|
||||
MmapWrapper debug_map_wrapper;
|
||||
typename ObjectFileReader::ObjectFileBase debug_header = NULL;
|
||||
if (!LoadFile(debuglink_file, &debug_map_wrapper,
|
||||
reinterpret_cast<const void**>(&debug_header)))
|
||||
return false;
|
||||
|
||||
if (!ObjectFileReader::IsValid(debug_header)) {
|
||||
fprintf(stderr, "Not a valid file: %s\n", debuglink_file.c_str());
|
||||
return false;
|
||||
}
|
||||
|
||||
// Sanity checks to make sure everything matches up.
|
||||
const char *debug_architecture =
|
||||
ObjectFileReader::Architecture(debug_header);
|
||||
if (!debug_architecture) {
|
||||
return false;
|
||||
}
|
||||
if (strcmp(architecture, debug_architecture)) {
|
||||
fprintf(stderr, "%s with machine architecture %s does not match "
|
||||
"%s with architecture %s\n",
|
||||
debuglink_file.c_str(), debug_architecture,
|
||||
obj_filename.c_str(), architecture);
|
||||
return false;
|
||||
}
|
||||
|
||||
bool debug_big_endian;
|
||||
if (!ObjectFileReader::Endianness(debug_header, &debug_big_endian))
|
||||
return false;
|
||||
if (debug_big_endian != big_endian) {
|
||||
fprintf(stderr, "%s and %s does not match in endianness\n",
|
||||
obj_filename.c_str(), debuglink_file.c_str());
|
||||
return false;
|
||||
}
|
||||
|
||||
if (!LoadSymbols<ObjectFileReader>(debuglink_file, debug_big_endian,
|
||||
debug_header, false, &info,
|
||||
options, module.get())) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
*out_module = module.release();
|
||||
return true;
|
||||
}
|
||||
|
||||
} // namespace
|
||||
|
||||
#endif // COMMON_PECOFF_DUMP_SYMBOLS_INL_H
|
||||
Reference in New Issue
Block a user