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// inremental.cc -- incremental linking test/deubg tool
// Copyright 2009 Free Software Foundation, Inc.
// Written by Rafael Avila de Espindola <rafael.espindola@gmail.com>
// This file is part of gold.
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.
// This file is a (still incomplete) test/debug tool that should display
// all information available in the incremental linking sections in a
// format that is easy to read.
// Once the format is a bit more stable, this should probably be moved to
// readelf. Because of that, the use of gold's data structures and functions
// is just a short term convenience and not a design decision.
#include "gold.h"
#include <stdio.h>
#include <errno.h>
#include "incremental.h"
namespace gold
{
class Output_file;
}
using namespace gold;
int
main(int argc, char** argv)
{
if (argc != 2)
{
fprintf(stderr, "Usage: %s <file>\n", argv[0]);
return 1;
}
const char* filename = argv[1];
Output_file* file = new Output_file(filename);
bool t = file->open_for_modification();
if (!t)
{
fprintf(stderr, "%s: open_for_modification(%s): %s\n", argv[0], filename,
strerror(errno));
return 1;
}
Incremental_binary* inc = open_incremental_binary(file);
if (inc == NULL)
{
fprintf(stderr, "%s: open_incremental_binary(%s): %s\n", argv[0],
filename, strerror(errno));
return 1;
}
unsigned int strtab_shndx;
Incremental_binary::Location location;
t = inc->find_incremental_inputs_section(&location, &strtab_shndx);
if (!t)
{
fprintf(stderr, "%s: %s: no .gnu_incremental_inputs section\n", argv[0],
filename);
return 1;
}
Incremental_binary::View inputs_view(inc->view(location));
const unsigned char *p = inputs_view.data();
const Incremental_inputs_header_data* incremental_header =
reinterpret_cast<const Incremental_inputs_header_data*> (p);
const Incremental_inputs_entry_data* incremental_inputs =
reinterpret_cast<const Incremental_inputs_entry_data*>
(p + sizeof(Incremental_inputs_header_data));
if (incremental_header->version != 1)
{
fprintf(stderr, "%s: %s: unknown incremental version %d\n", argv[0],
filename, incremental_header->version);
return 1;
}
elfcpp::Elf_file<64, false, Incremental_binary> elf_file(inc);
if (elf_file.section_type(strtab_shndx) != elfcpp::SHT_STRTAB)
{
fprintf(stderr,
"%s: %s: invalid string table section %u (type %d != %d)\n",
argv[0], filename, strtab_shndx,
elf_file.section_type(strtab_shndx), elfcpp::SHT_STRTAB);
return 1;
}
Incremental_binary::Location
strtab_location(elf_file.section_contents(strtab_shndx));
Incremental_binary::View strtab_view(inc->view(strtab_location));
p = strtab_view.data();
elfcpp::Elf_strtab strtab(strtab_view.data(), strtab_location.data_size);
const char* command_line;
t = strtab.get_c_string(incremental_header->command_line_offset,
&command_line);
if (!t)
{
fprintf(stderr,
"%s: %s: failed to get link command line: %zu out of range\n",
argv[0], filename,
static_cast<size_t>(incremental_header->command_line_offset));
return 1;
}
printf("Link command line: %s\n", command_line);
printf("Input files:\n");
for (unsigned i = 0; i < incremental_header->input_file_count; ++i)
{
const Incremental_inputs_entry_data* input =
&incremental_inputs[i];
const char *objname;
t = strtab.get_c_string(input->filename_offset, &objname);
if (!t)
{
fprintf(stderr,"%s: %s: failed to get file name for object %u:"
" %zu out of range\n", argv[0], filename, i,
static_cast<size_t>(input->filename_offset));
return 1;
}
printf(" %s\n", objname);
printf(" Timestamp sec = %llu\n",
static_cast<unsigned long long>(input->timestamp_sec));
printf(" Timestamp nsec = %d\n", input->timestamp_nsec);
printf(" Type = ");
// TODO: print the data at input->data_offset once we have it.
switch (input->input_type)
{
case INCREMENTAL_INPUT_OBJECT:
printf("Object\n");
break;
case INCREMENTAL_INPUT_ARCHIVE:
printf("Archive\n");
break;
case INCREMENTAL_INPUT_SHARED_LIBRARY:
printf("Shared library\n");
break;
case INCREMENTAL_INPUT_SCRIPT:
printf("Linker script\n");
if (input->data_offset != 0)
{
fprintf(stderr,"%s: %s: %u is a script but offset is not zero",
argv[0], filename, i);
return 1;
}
break;
case INCREMENTAL_INPUT_INVALID:
default:
fprintf(stderr, "%s: invalid file type for object %u: %d\n",
argv[0], i, input->input_type);
return 1;
}
}
return 0;
}
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