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geninfo.perl
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geninfo.perl
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#!/usr/bin/perl -w
#
# Copyright (c) International Business Machines Corp., 2002,2012
#
# 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 2 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
#
# geninfo
#
# This script generates .info files from data files as created by code
# instrumented with gcc's built-in profiling mechanism. Call it with
# --help and refer to the geninfo man page to get information on usage
# and available options.
#
#
# Authors:
# 2002-08-23 created by Peter Oberparleiter <[email protected]>
# IBM Lab Boeblingen
# based on code by Manoj Iyer <[email protected]> and
# Megan Bock <[email protected]>
# IBM Austin
# 2002-09-05 / Peter Oberparleiter: implemented option that allows file list
# 2003-04-16 / Peter Oberparleiter: modified read_gcov so that it can also
# parse the new gcov format which is to be introduced in gcc 3.3
# 2003-04-30 / Peter Oberparleiter: made info write to STDERR, not STDOUT
# 2003-07-03 / Peter Oberparleiter: added line checksum support, added
# --no-checksum
# 2003-09-18 / Nigel Hinds: capture branch coverage data from GCOV
# 2003-12-11 / Laurent Deniel: added --follow option
# workaround gcov (<= 3.2.x) bug with empty .da files
# 2004-01-03 / Laurent Deniel: Ignore empty .bb files
# 2004-02-16 / Andreas Krebbel: Added support for .gcno/.gcda files and
# gcov versioning
# 2004-08-09 / Peter Oberparleiter: added configuration file support
# 2008-07-14 / Tom Zoerner: added --function-coverage command line option
# 2008-08-13 / Peter Oberparleiter: modified function coverage
# implementation (now enabled per default)
# 2014-09-12 / VaL Doroshchuk: ported to Windows
use strict;
use File::Basename;
# FR added use
use File::Find;
use File::Spec::Functions qw /abs2rel catdir file_name_is_absolute splitdir
splitpath catpath/;
use Getopt::Long;
use Digest::MD5 qw(md5_base64);
if( $^O eq "msys" )
{
require File::Spec::Win32;
}
# Constants
our $lcov_version = 'LCOV version 1.11';
our $lcov_url = "http://ltp.sourceforge.net/coverage/lcov.php";
# @todo Needs to be changed
our $gcov_tool = "c:\\PATH_to\\gcov.exe";
our $tool_name = basename($0);
our $GCOV_VERSION_4_7_0 = 0x40700;
our $GCOV_VERSION_3_4_0 = 0x30400;
our $GCOV_VERSION_3_3_0 = 0x30300;
our $GCNO_FUNCTION_TAG = 0x01000000;
our $GCNO_LINES_TAG = 0x01450000;
our $GCNO_FILE_MAGIC = 0x67636e6f;
our $BBG_FILE_MAGIC = 0x67626267;
# Error classes which users may specify to ignore during processing
our $ERROR_GCOV = 0;
our $ERROR_SOURCE = 1;
our $ERROR_GRAPH = 2;
our %ERROR_ID = (
"gcov" => $ERROR_GCOV,
"source" => $ERROR_SOURCE,
"graph" => $ERROR_GRAPH,
);
our $EXCL_START = "LCOV_EXCL_START";
our $EXCL_STOP = "LCOV_EXCL_STOP";
our $EXCL_LINE = "LCOV_EXCL_LINE";
# Marker to exclude branch coverage but keep function and line coveage
our $EXCL_BR_START = "LCOV_EXCL_BR_START";
our $EXCL_BR_STOP = "LCOV_EXCL_BR_STOP";
our $EXCL_BR_LINE = "LCOV_EXCL_BR_LINE";
# Compatibility mode values
our $COMPAT_VALUE_OFF = 0;
our $COMPAT_VALUE_ON = 1;
our $COMPAT_VALUE_AUTO = 2;
# Compatibility mode value names
our %COMPAT_NAME_TO_VALUE = (
"off" => $COMPAT_VALUE_OFF,
"on" => $COMPAT_VALUE_ON,
"auto" => $COMPAT_VALUE_AUTO,
);
# Compatiblity modes
our $COMPAT_MODE_LIBTOOL = 1 << 0;
our $COMPAT_MODE_HAMMER = 1 << 1;
our $COMPAT_MODE_SPLIT_CRC = 1 << 2;
# Compatibility mode names
our %COMPAT_NAME_TO_MODE = (
"libtool" => $COMPAT_MODE_LIBTOOL,
"hammer" => $COMPAT_MODE_HAMMER,
"split_crc" => $COMPAT_MODE_SPLIT_CRC,
"android_4_4_0" => $COMPAT_MODE_SPLIT_CRC,
);
# Map modes to names
our %COMPAT_MODE_TO_NAME = (
$COMPAT_MODE_LIBTOOL => "libtool",
$COMPAT_MODE_HAMMER => "hammer",
$COMPAT_MODE_SPLIT_CRC => "split_crc",
);
# Compatibility mode default values
our %COMPAT_MODE_DEFAULTS = (
$COMPAT_MODE_LIBTOOL => $COMPAT_VALUE_ON,
$COMPAT_MODE_HAMMER => $COMPAT_VALUE_AUTO,
$COMPAT_MODE_SPLIT_CRC => $COMPAT_VALUE_AUTO,
);
# Compatibility mode auto-detection routines
sub compat_hammer_autodetect();
our %COMPAT_MODE_AUTO = (
$COMPAT_MODE_HAMMER => \&compat_hammer_autodetect,
$COMPAT_MODE_SPLIT_CRC => 1, # will be done later
);
our $BR_LINE = 0;
our $BR_BLOCK = 1;
our $BR_BRANCH = 2;
our $BR_TAKEN = 3;
our $BR_VEC_ENTRIES = 4;
our $BR_VEC_WIDTH = 32;
our $BR_VEC_MAX = vec(pack('b*', 1 x $BR_VEC_WIDTH), 0, $BR_VEC_WIDTH);
our $UNNAMED_BLOCK = -1;
# Prototypes
sub print_usage(*);
sub gen_info($);
sub process_dafile($$);
sub match_filename($@);
sub solve_ambiguous_match($$$);
sub split_filename($);
sub solve_relative_path($$);
sub read_gcov_header($);
sub read_gcov_file($);
sub info(@);
sub get_gcov_version();
sub system_no_output($@);
sub read_config($);
sub apply_config($);
sub get_exclusion_data($);
sub apply_exclusion_data($$);
sub process_graphfile($$);
sub filter_fn_name($);
sub warn_handler($);
sub die_handler($);
sub graph_error($$);
sub graph_expect($);
sub graph_read(*$;$$);
sub graph_skip(*$;$);
sub sort_uniq(@);
sub sort_uniq_lex(@);
sub graph_cleanup($);
sub graph_find_base($);
sub graph_from_bb($$$);
sub graph_add_order($$$);
sub read_bb_word(*;$);
sub read_bb_value(*;$);
sub read_bb_string(*$);
sub read_bb($);
sub read_bbg_word(*;$);
sub read_bbg_value(*;$);
sub read_bbg_string(*);
sub read_bbg_lines_record(*$$$$$);
sub read_bbg($);
sub read_gcno_word(*;$$);
sub read_gcno_value(*$;$$);
sub read_gcno_string(*$);
sub read_gcno_lines_record(*$$$$$$);
sub determine_gcno_split_crc($$$);
sub read_gcno_function_record(*$$$$);
sub read_gcno($);
sub get_gcov_capabilities();
sub get_overall_line($$$$);
sub print_overall_rate($$$$$$$$$);
sub br_gvec_len($);
sub br_gvec_get($$);
sub debug($);
sub int_handler();
sub parse_ignore_errors(@);
sub is_external($);
sub compat_name($);
sub parse_compat_modes($);
sub is_compat($);
sub is_compat_auto($);
# FR added wanted subroutine
sub wanted;
# Global variables
our $gcov_version;
our $gcov_version_string;
our $graph_file_extension;
our $data_file_extension;
our @data_directory;
our $test_name = "";
our $quiet;
our $help;
our $output_filename;
our $base_directory;
our $version;
our $follow;
our $checksum;
our $no_checksum;
our $opt_compat_libtool;
our $opt_no_compat_libtool;
our $rc_adjust_src_path;# Regexp specifying parts to remove from source path
our $adjust_src_pattern;
our $adjust_src_replace;
our $adjust_testname;
our $config; # Configuration file contents
our @ignore_errors; # List of errors to ignore (parameter)
our @ignore; # List of errors to ignore (array)
our $initial;
our $no_recursion = 0;
our $maxdepth;
our $no_markers = 0;
our $opt_derive_func_data = 0;
our $opt_external = 1;
our $opt_no_external;
our $debug = 0;
our $gcov_caps;
our @gcov_options;
our @internal_dirs;
our $opt_config_file;
our $opt_gcov_all_blocks = 1;
our $opt_compat;
our %opt_rc;
our %compat_value;
our $gcno_split_crc;
our $func_coverage = 1;
our $br_coverage = 0;
our $rc_auto_base = 1;
# FR added temporary file list
our @filelist;
our $cwd = `pwd`;
chomp($cwd);
#
# Code entry point
#
# Register handler routine to be called when interrupted
$SIG{"INT"} = \&int_handler;
$SIG{__WARN__} = \&warn_handler;
$SIG{__DIE__} = \&die_handler;
# Prettify version string
$lcov_version =~ s/\$\s*Revision\s*:?\s*(\S+)\s*\$/$1/;
# Set LC_ALL so that gcov output will be in a unified format
$ENV{"LC_ALL"} = "C";
# Check command line for a configuration file name
Getopt::Long::Configure("pass_through", "no_auto_abbrev");
GetOptions("config-file=s" => \$opt_config_file,
"rc=s%" => \%opt_rc);
Getopt::Long::Configure("default");
# Remove spaces around rc options
while (my ($key, $value) = each(%opt_rc)) {
delete($opt_rc{$key});
$key =~ s/^\s+|\s+$//g;
$value =~ s/^\s+|\s+$//g;
$opt_rc{$key} = $value;
}
# Read configuration file if available
if (defined($opt_config_file)) {
$config = read_config($opt_config_file);
} elsif (defined($ENV{"HOME"}) && (-r $ENV{"HOME"}."/.lcovrc"))
{
$config = read_config($ENV{"HOME"}."/.lcovrc");
}
elsif (-r "/etc/lcovrc")
{
$config = read_config("/etc/lcovrc");
}
if ($config || %opt_rc)
{
# Copy configuration file and --rc values to variables
apply_config({
"geninfo_gcov_tool" => \$gcov_tool,
"geninfo_adjust_testname" => \$adjust_testname,
"geninfo_checksum" => \$checksum,
"geninfo_no_checksum" => \$no_checksum, # deprecated
"geninfo_compat_libtool" => \$opt_compat_libtool,
"geninfo_external" => \$opt_external,
"geninfo_gcov_all_blocks" => \$opt_gcov_all_blocks,
"geninfo_compat" => \$opt_compat,
"geninfo_adjust_src_path" => \$rc_adjust_src_path,
"geninfo_auto_base" => \$rc_auto_base,
"lcov_function_coverage" => \$func_coverage,
"lcov_branch_coverage" => \$br_coverage,
});
# Merge options
if (defined($no_checksum))
{
$checksum = ($no_checksum ? 0 : 1);
$no_checksum = undef;
}
# Check regexp
if (defined($rc_adjust_src_path)) {
my ($pattern, $replace) = split(/\s*=>\s*/,
$rc_adjust_src_path);
local $SIG{__DIE__};
eval '$adjust_src_pattern = qr>'.$pattern.'>;';
if (!defined($adjust_src_pattern)) {
my $msg = $@;
chomp($msg);
$msg =~ s/at \(eval.*$//;
warn("WARNING: invalid pattern in ".
"geninfo_adjust_src_path: $msg\n");
} elsif (!defined($replace)) {
# If no replacement is specified, simply remove pattern
$adjust_src_replace = "";
} else {
$adjust_src_replace = $replace;
}
}
}
# Parse command line options
if (!GetOptions("test-name|t=s" => \$test_name,
"output-filename|o=s" => \$output_filename,
"checksum" => \$checksum,
"no-checksum" => \$no_checksum,
"base-directory|b=s" => \$base_directory,
"version|v" =>\$version,
"quiet|q" => \$quiet,
"help|h|?" => \$help,
"follow|f" => \$follow,
"compat-libtool" => \$opt_compat_libtool,
"no-compat-libtool" => \$opt_no_compat_libtool,
"gcov-tool=s" => \$gcov_tool,
"ignore-errors=s" => \@ignore_errors,
"initial|i" => \$initial,
"no-recursion" => \$no_recursion,
"no-markers" => \$no_markers,
"derive-func-data" => \$opt_derive_func_data,
"debug" => \$debug,
"external" => \$opt_external,
"no-external" => \$opt_no_external,
"compat=s" => \$opt_compat,
"config-file=s" => \$opt_config_file,
"rc=s%" => \%opt_rc,
))
{
print(STDERR "Use $tool_name --help to get usage information\n");
exit(1);
}
else
{
# Merge options
if (defined($no_checksum))
{
$checksum = ($no_checksum ? 0 : 1);
$no_checksum = undef;
}
if (defined($opt_no_compat_libtool))
{
$opt_compat_libtool = ($opt_no_compat_libtool ? 0 : 1);
$opt_no_compat_libtool = undef;
}
if (defined($opt_no_external)) {
$opt_external = 0;
$opt_no_external = undef;
}
}
@data_directory = @ARGV;
# Check for help option
if ($help)
{
print_usage(*STDOUT);
exit(0);
}
# Check for version option
if ($version)
{
print("$tool_name: $lcov_version\n");
exit(0);
}
# Check gcov tool
if (system_no_output(3, $gcov_tool, "--help") == -1)
{
die("ERROR: need tool $gcov_tool!\n");
}
($gcov_version, $gcov_version_string) = get_gcov_version();
# Determine gcov options
$gcov_caps = get_gcov_capabilities();
push(@gcov_options, "-b") if ($gcov_caps->{'branch-probabilities'} &&
($br_coverage || $func_coverage));
push(@gcov_options, "-c") if ($gcov_caps->{'branch-counts'} &&
$br_coverage);
push(@gcov_options, "-a") if ($gcov_caps->{'all-blocks'} &&
$opt_gcov_all_blocks && $br_coverage);
push(@gcov_options, "-p") if ($gcov_caps->{'preserve-paths'});
# Determine compatibility modes
parse_compat_modes($opt_compat);
# Determine which errors the user wants us to ignore
parse_ignore_errors(@ignore_errors);
# Make sure test names only contain valid characters
if ($test_name =~ s/\W/_/g)
{
warn("WARNING: invalid characters removed from testname!\n");
}
# Adjust test name to include uname output if requested
if ($adjust_testname)
{
$test_name .= "__".`uname -a`;
$test_name =~ s/\W/_/g;
}
# Make sure base_directory contains an absolute path specification
if ($base_directory)
{
$base_directory = solve_relative_path($cwd, $base_directory);
}
# Check for follow option
if ($follow)
{
$follow = "-follow"
}
else
{
$follow = "";
}
# Determine checksum mode
if (defined($checksum))
{
# Normalize to boolean
$checksum = ($checksum ? 1 : 0);
}
else
{
# Default is off
$checksum = 0;
}
# Determine max depth for recursion
if ($no_recursion)
{
$maxdepth = "-maxdepth 1";
}
else
{
$maxdepth = "";
}
# Check for directory name
if (!@data_directory)
{
die("No directory specified\n".
"Use $tool_name --help to get usage information\n");
}
else
{
foreach (@data_directory)
{
stat($_);
if (!-r _)
{
die("ERROR: cannot read $_!\n");
}
}
}
if ($gcov_version < $GCOV_VERSION_3_4_0)
{
if (is_compat($COMPAT_MODE_HAMMER))
{
$data_file_extension = ".da";
$graph_file_extension = ".bbg";
}
else
{
$data_file_extension = ".da";
$graph_file_extension = ".bb";
}
}
else
{
$data_file_extension = ".gcda";
$graph_file_extension = ".gcno";
}
# Check output filename
if (defined($output_filename) && ($output_filename ne "-"))
{
# Initially create output filename, data is appended
# for each data file processed
local *DUMMY_HANDLE;
open(DUMMY_HANDLE, ">", $output_filename)
or die("ERROR: cannot create $output_filename!\n");
close(DUMMY_HANDLE);
# Make $output_filename an absolute path because we're going
# to change directories while processing files
if (!($output_filename =~ /^\/(.*)$/))
{
$output_filename = $cwd."/".$output_filename;
}
}
# Build list of directories to identify external files
foreach my $entry(@data_directory, $base_directory) {
next if (!defined($entry));
push(@internal_dirs, solve_relative_path($cwd, $entry));
}
# Do something
foreach my $entry (@data_directory) {
gen_info($entry);
}
if ($initial && $br_coverage) {
warn("Note: --initial does not generate branch coverage ".
"data\n");
}
info("Finished .info-file creation\n");
exit(0);
#
# print_usage(handle)
#
# Print usage information.
#
sub print_usage(*)
{
local *HANDLE = $_[0];
print(HANDLE <<END_OF_USAGE);
Usage: $tool_name [OPTIONS] DIRECTORY
Traverse DIRECTORY and create a .info file for each data file found. Note
that you may specify more than one directory, all of which are then processed
sequentially.
-h, --help Print this help, then exit
-v, --version Print version number, then exit
-q, --quiet Do not print progress messages
-i, --initial Capture initial zero coverage data
-t, --test-name NAME Use test case name NAME for resulting data
-o, --output-filename OUTFILE Write data only to OUTFILE
-f, --follow Follow links when searching .da/.gcda files
-b, --base-directory DIR Use DIR as base directory for relative paths
--(no-)checksum Enable (disable) line checksumming
--(no-)compat-libtool Enable (disable) libtool compatibility mode
--gcov-tool TOOL Specify gcov tool location
--ignore-errors ERROR Continue after ERROR (gcov, source, graph)
--no-recursion Exclude subdirectories from processing
--no-markers Ignore exclusion markers in source code
--derive-func-data Generate function data from line data
--(no-)external Include (ignore) data for external files
--config-file FILENAME Specify configuration file location
--rc SETTING=VALUE Override configuration file setting
--compat MODE=on|off|auto Set compat MODE (libtool, hammer, split_crc)
For more information see: $lcov_url
END_OF_USAGE
;
}
#
# get_common_prefix(min_dir, filenames)
#
# Return the longest path prefix shared by all filenames. MIN_DIR specifies
# the minimum number of directories that a filename may have after removing
# the prefix.
#
sub get_common_prefix($@)
{
my ($min_dir, @files) = @_;
my $file;
my @prefix;
my $i;
foreach $file (@files) {
my ($v, $d, $f) = splitpath($file);
my @comp = splitdir($d);
if (!@prefix) {
@prefix = @comp;
next;
}
for ($i = 0; $i < scalar(@comp) && $i < scalar(@prefix); $i++) {
if ($comp[$i] ne $prefix[$i] ||
((scalar(@comp) - ($i + 1)) <= $min_dir)) {
delete(@prefix[$i..scalar(@prefix)]);
last;
}
}
}
return catdir(@prefix);
}
#
# gen_info(directory)
#
# Traverse DIRECTORY and create a .info file for each data file found.
# The .info file contains TEST_NAME in the following format:
#
# TN:<test name>
#
# For each source file name referenced in the data file, there is a section
# containing source code and coverage data:
#
# SF:<absolute path to the source file>
# FN:<line number of function start>,<function name> for each function
# DA:<line number>,<execution count> for each instrumented line
# LH:<number of lines with an execution count> greater than 0
# LF:<number of instrumented lines>
#
# Sections are separated by:
#
# end_of_record
#
# In addition to the main source code file there are sections for each
# #included file containing executable code. Note that the absolute path
# of a source file is generated by interpreting the contents of the respective
# graph file. Relative filenames are prefixed with the directory in which the
# graph file is found. Note also that symbolic links to the graph file will be
# resolved so that the actual file path is used instead of the path to a link.
# This approach is necessary for the mechanism to work with the /proc/gcov
# files.
#
# Die on error.
#
# FR filter for Find method to
# search for files with gcda extension in all subfolders
sub wanted
{
if (-f $_)
{
if ($_ =~ m/\.gcda$/)
{
push @filelist, $File::Find::name;
}
}
}
sub gen_info($)
{
my $directory = $_[0];
my @file_list;
my $file;
my $prefix;
my $type;
my $ext;
if ($initial) {
$type = "graph";
$ext = $graph_file_extension;
} else {
$type = "data";
$ext = $data_file_extension;
}
if (-d $directory)
{
info("Scanning $directory for $ext files ...\n");
# FR rem @file_list = 'find "$directory" $maxdepth $follow -name \\*$ext -type f 2>/dev/null';
# FR added find instead of linux find
find(\&wanted, $directory);
@file_list = @filelist;
chomp(@file_list);
if (!@file_list) {
warn("WARNING: no $ext files found in $directory - ".
"skipping!\n");
return;
}
$prefix = get_common_prefix(1, @file_list);
info("Found %d %s files in %s\n", $#file_list+1, $type,
$directory);
}
else
{
@file_list = ($directory);
$prefix = "";
}
# Process all files in list
foreach $file (@file_list) {
# Process file
if ($initial) {
process_graphfile($file, $prefix);
} else {
process_dafile($file, $prefix);
}
}
}
#
# derive_data(contentdata, funcdata, bbdata)
#
# Calculate function coverage data by combining line coverage data and the
# list of lines belonging to a function.
#
# contentdata: [ instr1, count1, source1, instr2, count2, source2, ... ]
# instr<n>: Instrumentation flag for line n
# count<n>: Execution count for line n
# source<n>: Source code for line n
#
# funcdata: [ count1, func1, count2, func2, ... ]
# count<n>: Execution count for function number n
# func<n>: Function name for function number n
#
# bbdata: function_name -> [ line1, line2, ... ]
# line<n>: Line number belonging to the corresponding function
#
sub derive_data($$$)
{
my ($contentdata, $funcdata, $bbdata) = @_;
my @gcov_content = @{$contentdata};
my @gcov_functions = @{$funcdata};
my %fn_count;
my %ln_fn;
my $line;
my $maxline;
my %fn_name;
my $fn;
my $count;
if (!defined($bbdata)) {
return @gcov_functions;
}
# First add existing function data
while (@gcov_functions) {
$count = shift(@gcov_functions);
$fn = shift(@gcov_functions);
$fn_count{$fn} = $count;
}
# Convert line coverage data to function data
foreach $fn (keys(%{$bbdata})) {
my $line_data = $bbdata->{$fn};
my $line;
my $fninstr = 0;
if ($fn eq "") {
next;
}
# Find the lowest line count for this function
$count = 0;
foreach $line (@$line_data) {
my $linstr = $gcov_content[ ( $line - 1 ) * 3 + 0 ];
my $lcount = $gcov_content[ ( $line - 1 ) * 3 + 1 ];
next if (!$linstr);
$fninstr = 1;
if (($lcount > 0) &&
(($count == 0) || ($lcount < $count))) {
$count = $lcount;
}
}
next if (!$fninstr);
$fn_count{$fn} = $count;
}
# Check if we got data for all functions
foreach $fn (keys(%fn_name)) {
if ($fn eq "") {
next;
}
if (defined($fn_count{$fn})) {
next;
}
warn("WARNING: no derived data found for function $fn\n");
}
# Convert hash to list in @gcov_functions format
foreach $fn (sort(keys(%fn_count))) {
push(@gcov_functions, $fn_count{$fn}, $fn);
}
return @gcov_functions;
}
#
# get_filenames(directory, pattern)
#
# Return a list of filenames found in directory which match the specified
# pattern.
#
# Die on error.
#
sub get_filenames($$)
{
my ($dirname, $pattern) = @_;
my @result;
my $directory;
local *DIR;
opendir(DIR, $dirname) or
die("ERROR: cannot read directory $dirname\n");
while ($directory = readdir(DIR)) {
push(@result, $directory) if ($directory =~ /$pattern/);
}
closedir(DIR);
return @result;
}
#
# process_dafile(da_filename, dir)
#
# Create a .info file for a single data file.
#
# Die on error.
#
sub process_dafile($$)
{
my ($file, $dir) = @_;
my $da_filename; # Name of data file to process
my $da_dir; # Directory of data file
my $source_dir; # Directory of source file
my $da_basename; # data filename without ".da/.gcda" extension
my $bb_filename; # Name of respective graph file
my $bb_basename; # Basename of the original graph file
my $graph; # Contents of graph file
my $instr; # Contents of graph file part 2
my $gcov_error; # Error code of gcov tool
my $object_dir; # Directory containing all object files
my $source_filename; # Name of a source code file
my $gcov_file; # Name of a .gcov file
my @gcov_content; # Content of a .gcov file
my $gcov_branches; # Branch content of a .gcov file
my @gcov_functions; # Function calls of a .gcov file
my @gcov_list; # List of generated .gcov files
my $line_number; # Line number count
my $lines_hit; # Number of instrumented lines hit
my $lines_found; # Number of instrumented lines found
my $funcs_hit; # Number of instrumented functions hit
my $funcs_found; # Number of instrumented functions found
my $br_hit;
my $br_found;
my $source; # gcov source header information
my $object; # gcov object header information
my @matches; # List of absolute paths matching filename
my $base_dir; # Base directory for current file
my @tmp_links; # Temporary links to be cleaned up
my @result;
my $index;
my $da_renamed; # If data file is to be renamed
local *INFO_HANDLE;
info("Processing %s\n", abs2rel($file, $dir));
# Get path to data file in absolute and normalized form (begins with /,
# contains no more ../ or ./)
$da_filename = solve_relative_path($cwd, $file);
# Get directory and basename of data file
($da_dir, $da_basename) = split_filename($da_filename);
$source_dir = $da_dir;
if (is_compat($COMPAT_MODE_LIBTOOL)) {
# Avoid files from .libs dirs
$source_dir =~ s/\.libs$//;
}
if (-z $da_filename)
{
$da_renamed = 1;
}
else
{
$da_renamed = 0;
}
# Construct base_dir for current file
if ($base_directory)
{
$base_dir = $base_directory;
}
else
{
$base_dir = $source_dir;
}
# Check for writable $base_dir (gcov will try to write files there)
stat($base_dir);
if (!-w _)
{
die("ERROR: cannot write to directory $base_dir!\n");
}
# Construct name of graph file
$bb_basename = $da_basename.$graph_file_extension;
$bb_filename = "$da_dir/$bb_basename";
# Find out the real location of graph file in case we're just looking at
# a link
while (readlink($bb_filename))
{
my $last_dir = dirname($bb_filename);
$bb_filename = readlink($bb_filename);
$bb_filename = solve_relative_path($last_dir, $bb_filename);
}
# Ignore empty graph file (e.g. source file with no statement)
if (-z $bb_filename)
{
warn("WARNING: empty $bb_filename (skipped)\n");
return;
}
# Read contents of graph file into hash. We need it later to find out
# the absolute path to each .gcov file created as well as for
# information about functions and their source code positions.
if ($gcov_version < $GCOV_VERSION_3_4_0)
{
if (is_compat($COMPAT_MODE_HAMMER))
{
($instr, $graph) = read_bbg($bb_filename);
}
else
{
($instr, $graph) = read_bb($bb_filename);
}
}
else
{
($instr, $graph) = read_gcno($bb_filename);
}
# Try to find base directory automatically if requested by user
if ($rc_auto_base) {
$base_dir = find_base_from_graph($base_dir, $instr, $graph);
}
($instr, $graph) = adjust_graph_filenames($base_dir, $instr, $graph);
# Set $object_dir to real location of object files. This may differ