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calltree.pl
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#!/usr/bin/perl
#
# Copyright (c) 2020 Ran Panfeng. All rights reserved.
# Author: satanson
# Email: ranpanf@gmail.com
# Github repository: https://github.com/satanson/cpp_etudes.git
# Usage: show function call hierarchy of cpp project in the style of Linux utility tree.
#
# Format:
# ./calltree.pl <keyword|regex> <func_match_rule> <direction(called(1)|calling)> <verbose(0|1)> <depth(num)>
#
# - keyword for exact match, regex for fuzzy match;
# - subtrees whose leaf nodes does not match func_match_rule are pruned, default value is '' means match all;
# - direction: 1, in default, show functions called by other functions in callees' perspective; otherwise, show function calling relation in callers' perspective;
# - verbose=0, no file locations output; otherwise succinctly output;
# - depth=num, print max derivation depth.
#
# Examples:
#
# # show all functions (set depth=1 preventing output from overwhelming).
# ./calltree.pl '\w+' '' 1 1 1
#
# # show functions calling fdatasync in a backtrace way with depth 3;
# ./calltree.pl 'fdatasync' '' 1 1 3
#
# # show functions calling sync_file_range in a backtrace way with depth 3;
# ./calltree.pl 'sync_file_range' '' 1 1 3
#
# # show functions calling fsync in a backtrace way with depth 4;
# /calltree.pl 'fsync' '' 1 1 4
#
use warnings;
use strict;
use Data::Dumper;
use List::Util qw/max/;
use Storable qw/freeze thaw nstore retrieve/;
sub red_color($) {
my ($msg) = @_;
"\e[95;31;1m$msg\e[m"
}
sub any(&;@) {
my ($pred, @values) = @_;
my $n = () = grep {$_} map {$pred->($_)} @values;
$n > 0;
}
sub all(&;@) {
my ($pred, @values) = @_;
!(any {!$pred->($_)} @values);
}
package RAII {
sub new {
my ($cls, $ref, $unref) = @_;
$ref->();
my $obj = {
unref => $unref,
};
return bless $obj, $cls;
}
sub DESTROY {
local ($., $!, $?, $@, $^E);
my ($obj) = @_;
$obj->{unref}();
}
}
my $Global_isatty = -t STDOUT;
use Cwd qw/abs_path/;
sub get_path_of_script() {
if ($0 !~ qr'/') {
my ($path) = map {chomp;
$_} qx(which $0 2>/dev/null);
return $path;
}
else {
return abs_path($0);
}
}
sub mind(@) {
my ($title, @lines) = @_;
# [level, content, children]
my @stk = ([ 0, $title, [] ]);
foreach my $ln (@lines) {
if ($ln =~ /^([-]*)\s*(.*)/) {
my ($dashes, $content) = ($1, $2);
my $level = length($dashes);
while (scalar(@stk) > 0 && $stk[-1][0] + 1 != $level) {
pop @stk;
}
die "Ill-formed mind input" if (scalar(@stk) == 0);
my $top = $stk[-1];
my $curr = [ $level, $content, [] ];
push @stk, $curr;
my ($top_level, $parent_content, $top_children) = @$top;
push @$top_children, $curr;
}
}
return $stk[0];
}
sub file_newer_than($$) {
my ($file_a, $file_b) = @_;
return 0 unless ((-f $file_a) && (-f $file_b));
return (-M $file_a) < (-M $file_b);
}
sub file_newer_than_script($) {
file_newer_than(+shift, get_path_of_script());
}
sub get_cached_or_run(&$$;@) {
my ($func, $validate_func, $cached_file, @args) = @_;
if (file_newer_than_script($cached_file)) {
my $result = retrieve($cached_file);
if (defined($result) && ref($result) eq ref([]) && $validate_func->(@$result)) {
return @$result;
}
}
my @result = $func->(@args);
nstore [ @result ], $cached_file;
return @result;
}
sub get_cache_or_run_keyed(\@$$;@) {
my ($key, $file, $func, @args) = @_;
die "Invalid data" unless defined($key) && ref($key) eq ref([]);
die "Invalid func" unless defined($func);
my @key = @$key;
my $expect_key = join "\0", @key;
my $check_key = sub(\%) {
my $data = shift;
return exists $data->{cached_key} && $data->{cached_key} eq $expect_key;
};
my ($data) = get_cached_or_run {
+{ cached_key => $expect_key, cached_data => [ $func->(@args) ] }
} $check_key, $file;
return @{$data->{cached_data}};
}
sub ensure_ag_installed() {
my ($ag_path) = map {chomp;
$_} qx(which ag 2>/dev/null);
if (!defined($ag_path) || (!-e $ag_path)) {
printf STDERR "ag is missing, please install ag at first, refer to https://github.com/ggreer/the_silver_searcher;
the fork https://github.com/satanson/the_silver_searcher provides a --multiline-break options will generate exact
result because the modified ag insert break(--) between two function definitions that are not separated by blank
lines.";
exit 1;
}
}
sub multiline_break_enabled() {
my ($enabled) = map {chomp;
$_} qx(echo enabled|ag --multiline-break enabled 2>/dev/null);
return defined($enabled) && $enabled eq "enabled";
}
sub ensure_safe() {
my ($cwd, $home) = @ENV{qw/PWD HOME/};
my @supported_os = qw/Linux Darwin/;
my %supported_os = map {$_ => 1} @supported_os;
my ($os) = map {
if (defined($_)) {
chomp;
$_
}
else {"UNKNOWN"}
} qx'uname -s 2>/dev/null';
my $supported_os = join "|", @supported_os;
die "Platform '$os' is not supported, run calltree.pl in [$supported_os]" unless exists $supported_os{$os};
die "Undefined cwd or home" unless defined($cwd) && defined($home);
die "Never run calltree.pl in HOME directory: '$home'" if $cwd eq $home;
die "Never run calltree.pl in root directory: '$cwd'" if $cwd eq '/';
my @comp = split qr'/+', $cwd;
die "Never run calltree.pl in a directory whose depth <= 2" if scalar(@comp) <= 3;
}
my $ignore_pattern = join "", map {" --ignore '$_' "}
qw(*test* *benchmark* *CMakeFiles* *contrib/* *third_party/*
*thirdparty/* *3rd-[pP]arty/* *3rd[pP]arty/* *deps/*);
my $cpp_filename_pattern = qq/'\\.(c|cc|cpp|cu|C|h|hh|hpp|cuh|H)\$'/;
my $RE_IDENTIFIER = "\\b[A-Za-z_]\\w*\\b";
my $RE_WS = "(?:\\s)";
my $RE_TWO_COLON = "(?::{2})";
my $RE_SCOPED_IDENTIFIER = "(?:$RE_TWO_COLON $RE_WS*)? (?: $RE_IDENTIFIER $RE_WS* $RE_TWO_COLON $RE_WS*)* [~]?$RE_IDENTIFIER" =~ s/ //gr;
sub gen_nested_pair_re($$$) {
my ($L, $R, $others) = @_;
my $simple_case = "$others $L $others $R $others";
my $recursive_case = "$others $L(?-1)*$R $others";
my $nested = "($recursive_case|$simple_case)";
return "(?:$L $others $nested* $others $R)" =~ s/\s+//gr;
}
my $RE_NESTED_PARENTHESES = gen_nested_pair_re("\\(", "\\)", "[^()]*");
my $RE_NESTED_BRACES = gen_nested_pair_re("{", "}", "[^{}]*");
sub gen_re_list($$$) {
my ($re_delimiter, $re_item, $optional) = @_;
my $re = "(?: $re_item (?: $RE_WS* $re_delimiter $RE_WS* $re_item)*? ) $optional";
return $re =~ s/ //gr;
}
sub gen_re_initializer_list_of_ctor() {
my $re_csv = gen_re_list(",", "(?:[^,]+?)", "??");
my $initializer = "(?: $RE_SCOPED_IDENTIFIER $RE_WS* (?: (?: \\( $RE_WS* $re_csv $RE_WS* \\) ) | (?: \\{ $RE_WS* $re_csv $RE_WS* \\} ) ) )";
my $re_csv_initializer = gen_re_list(",", "(?: $initializer )", "");
my $initializer_list = "(?: (?<=\\) ) $RE_WS* : $RE_WS* $re_csv_initializer $RE_WS* (?={) )";
return $initializer_list =~ s/ //gr;
}
my $RE_INITIALIZER_LIST = gen_re_initializer_list_of_ctor();
sub gen_re_overload_operator() {
my $operators = "[-+*/%^&|~!=<>]=?|(?:(?:<<|>>|\\|\\||&&)=?)|<=>|->\\*|->|\\(\\s*\\)|\\[\\s*\\]|\\+\\+|--|,";
my $re = "(?:operator \\s* (?:$operators)\\s*(?=\\())";
return $re =~ s/ //gr;
}
my $RE_OVERLOAD_OPERATOR = gen_re_overload_operator();
sub gen_re_func_def() {
my $re_func_def = "";
$re_func_def .= "^.*?($RE_SCOPED_IDENTIFIER|$RE_OVERLOAD_OPERATOR) $RE_WS* $RE_NESTED_PARENTHESES";
$re_func_def .= "(?:$RE_INITIALIZER_LIST)?";
$re_func_def .= "$RE_WS* $RE_NESTED_BRACES";
$re_func_def =~ s/ //g;
return $re_func_def;
}
sub gen_re_func_def_name() {
my $re_func_def = "";
$re_func_def .= "^.*?($RE_SCOPED_IDENTIFIER|$RE_OVERLOAD_OPERATOR) $RE_WS* $RE_NESTED_PARENTHESES";
$re_func_def =~ s/ //g;
return $re_func_def;
}
my $RE_FUNC_DEFINITION = gen_re_func_def;
my $RE_FUNC_DEFINITION_NAME = gen_re_func_def_name;
sub gen_re_func_call() {
my $cs_tokens = "$RE_WS* (?:(?: $RE_SCOPED_IDENTIFIER $RE_WS* , $RE_WS*)* $RE_SCOPED_IDENTIFIER $RE_WS*)?";
#my $re_func_call = "((?:($RE_SCOPED_IDENTIFIER) $RE_WS *(?:\\($cs_tokens\\))? $RE_WS* (?: \\. | -> | :: ) $RE_WS* )? ($RE_SCOPED_IDENTIFIER)) $RE_WS* [(]";
my $re_func_call = "((?:($RE_SCOPED_IDENTIFIER) $RE_WS (?: \\. | -> | :: ) $RE_WS* )? ($RE_SCOPED_IDENTIFIER)) $RE_WS* [(]";
return $re_func_call =~ s/ //gr;
}
my $RE_FUNC_CALL = gen_re_func_call;
sub gen_re_gcc_attribute() {
my $attr = "(?: $RE_IDENTIFIER (?: $RE_WS* \\([^()]+\\) )? )";
my $attr_list = "(?: $attr (?: $RE_WS* , $RE_WS* $attr $RE_WS*)*)";
my $gcc_attribute = "__attribute__ $RE_WS* \\( \\(? $RE_WS* $attr_list $RE_WS* \\)? \\)";
return $gcc_attribute =~ s/ //gr;
}
my $RE_GCC_ATTRIBUTE = gen_re_gcc_attribute();
sub read_content($) {
my $file_name = shift;
if (-f $file_name) {
open my $handle, "<", $file_name or die "Fail to open '$file_name' for reading: $!";
local $/;
my $content = <$handle>;
close $handle;
return $content;
}
return undef;
}
sub write_content($@) {
my ($file_name, @lines) = @_;
open my $handle, "+>", $file_name or die "Fail to open '$file_name' for writing: $!";
print $handle join("\n", @lines);
close $handle;
}
sub read_lines($) {
my $file_name = shift;
if (-f $file_name) {
open my $handle, "<", $file_name or die "Fail to open '$file_name' for reading: $!";
my @lines = <$handle>;
close $handle;
return \@lines;
}
return undef;
}
## preprocess source file
my $RE_QUOTED_STRING = qr/("([^"]*\\")*[^"]*")/;
my $RE_SINGLE_CHAR = qr/'[\\]?.'/;
my $RE_SLASH_STAR_COMMENT = qr"(/[*]([^/*]*(([*]+|[/]+)[^/*]+)*([*]+|[/]+)?)[*]/)";
my $RE_NESTED_CHARS_IN_SINGLE_QUOTES = qr/'[{}<>()]'/;
my $RE_SINGLE_LINE_COMMENT = qr'/[/\\].*';
my $RE_LEFT_ANGLES = qr'<[<=]+';
my $RE_TEMPLATE_ARGS_1LAYER = qr'(<\s*(((::)?(\w+::)*\w+\s*,\s*)*(::)?(\w+::)*\w+\s*)>)';
my $RE_STD_FUNCTION = qr'(?:::\s*)?\b(?:\w+\s*::\s*)*(\w+)\s*<\s*\w+\s*\(\)\s*\>';
my $RE_CSV_TOKEN = gen_re_list(",", $RE_SCOPED_IDENTIFIER, "??");
my $RE_NOEXCEPT_THROW = qr"(\\b(noexcept|throw)\\b)(\\s*\\(\\s*$RE_CSV_TOKEN\\s*\\))?";
my $RE_MACRO_DEF = qr/(#define([^\n\r]*\\(\n\r?|\r\n?))*([^\n\r]*[^\n\r\\])?((\n\r?)|(\r\n?)|$))/;
my $RE_CONDITIONAL_COMPILE_BEGIN_BRANCH = qr/^[\t ]*#(if|endif).*$/;
my $RE_CONDITIONAL_COMPILE_MID_BRANCH = qr/(?s)(^[\t ]*#elif.*?)(?=^[\t ]*#(?:elif|else|endif))/ms;
my $RE_CONDITIONAL_COMPILE_END_BRANCH = qr/(?s)(^[\t ]*#(?:elif|else).*?#endif)/ms;
my $RE_ARROW_RETURN = qr/(?<=\))(\s*->\s*(::)?(\s*\w+\s*::)*\s*\w+\s*)(?={)/;
sub with_blank_lines($$) {
my ($var, $lines) = (@_);
$var . (join "\n", map {""} split "\n", $lines);
}
sub empty_string_with_blank_lines($) {
with_blank_lines(qq/""/, $_[0]);
}
sub xvar_with_blank_lines($) {
with_blank_lines("x", $_[0]);
}
sub blank_lines($) {
$_[0] =~ tr/\n\r//cdr;
}
sub replace_single_char($) {
$_[0] =~ s/$RE_SINGLE_CHAR/'x'/gr;
}
my $ignored_functions = "(?:clEnumValN|cl::\\w+)";
my $nested_parentheses = qr/(\b$ignored_functions\b(?:\([^()]*([^()]*\((?-1)*\)[^()]*|[^()]*\([^()]*\)[^()]*)*[^()]*\))?)/;
sub replace_ignored_functions($) {
return $_[0] =~ s/$nested_parentheses/&xvar_with_blank_lines($1)/gemr
}
sub replace_quoted_string($) {
return $_[0] =~ s/$RE_QUOTED_STRING/&empty_string_with_blank_lines($1)/gemr;
}
sub replace_slash_star_comment($) {
$_[0] =~ s/$RE_SLASH_STAR_COMMENT/&blank_lines($1)/gemr;
}
sub replace_conditional_compilation_begin_branch($) {
$_[0] =~ s/$RE_CONDITIONAL_COMPILE_BEGIN_BRANCH//gr;
}
sub replace_conditional_compilation_mid_branch($) {
($_[0] =~ s/$RE_CONDITIONAL_COMPILE_MID_BRANCH/&blank_lines($1)/gemr, $1);
}
sub replace_conditional_compilation_end_branch($) {
$_[0] =~ s/$RE_CONDITIONAL_COMPILE_END_BRANCH/&blank_lines($1)/gemr;
}
sub replace_nested_char($) {
$_[0] =~ s/$RE_NESTED_CHARS_IN_SINGLE_QUOTES/'x'/gr;
}
sub replace_single_line_comment($) {
$_[0] =~ s/$RE_SINGLE_LINE_COMMENT//gr;
}
sub replace_left_angles($) {
$_[0] =~ s/$RE_LEFT_ANGLES/++/gr;
}
sub replace_lt($) {
$_[0] =~ s/\s+<\s+/ + /gr;
}
sub replace_template_args_1layer($) {
($_[0] =~ s/$RE_TEMPLATE_ARGS_1LAYER/&blank_lines($1)/gemr, $1);
}
sub replace_std_function($) {
$_[0] =~ s/$RE_STD_FUNCTION/$1/gr;
}
sub replace_seastar($) {
$_[0] =~ s/^[\n ]*SEASTAR_CONCEPT.*$/ /gr;
}
sub replace_whitespaces($) {
($_[0] =~ s/(?:^\s+)|(?:\s+$)//gr) =~ s/(?:(?<=\W)\s+)|(?:\s+(?=\W))/ /gr;
}
sub remove_misc($) {
$_[0] =~ s/(?<=\))(\s*\w+\s*)(?={)/&blank_lines($1)/gemr;
}
sub remove_noexcept($) {
$_[0] =~ s/\bnoexcept\b/ /gr;
}
sub repeat_apply($\&$) {
my ($times, $fun, $arg) = @_;
my ($result, $continue) = $fun->($arg);
if (defined($continue) && $times > 1) {
return &repeat_apply($times - 1, $fun, $result);
}
return $result;
}
sub remove_keywords_and_attributes($) {
$_[0] =~ s/(\b(volatile|const|final|override)\b)|\[\[\w+\]\]//gr;
}
sub remove_noexcept_and_throw($) {
$_[0] =~ s/$RE_NOEXCEPT_THROW//gr;
}
sub replace_template_args_4layers($) {
repeat_apply(4, &replace_template_args_1layer, $_[0]);
}
sub remove_gcc_attributes($) {
$_[0] =~ s/$RE_GCC_ATTRIBUTE//gr;
}
sub replace_macro_defs($) {
$_[0] =~ s/$RE_MACRO_DEF/&blank_lines($1)/gemr;
}
sub replace_arrow_return($) {
$_[0] =~ s/$RE_ARROW_RETURN/&blank_lines($1)/gemr;
}
sub preprocess_one_cpp_file($) {
my $file = shift;
return unless -f $file;
my $content = read_content($file);
return unless defined($content) && length($content) > 0;
$content = repeat_apply(10, &replace_conditional_compilation_mid_branch, $content);
$content = repeat_apply(4, &replace_ignored_functions, $content);
$content = replace_conditional_compilation_end_branch($content);
$content = join qq/\n/, map {
replace_conditional_compilation_begin_branch($_);
} split qq/\n/, $content;
$content = replace_quoted_string(replace_single_char(replace_slash_star_comment($content)));
$content = join qq/\n/, map {
replace_whitespaces(replace_seastar(replace_lt(replace_left_angles(replace_nested_char(replace_single_line_comment($_))))))
} split qq/\n/, $content;
$content = remove_keywords_and_attributes($content);
$content = remove_gcc_attributes($content);
$content = replace_template_args_4layers($content);
$content = replace_std_function($content);
$content = remove_noexcept_and_throw($content);
$content = remove_noexcept($content);
$content = replace_macro_defs($content);
$content = replace_arrow_return($content);
$content = remove_misc($content);
my $tmp_file = "$file.tmp.created_by_call_tree";
write_content($tmp_file, $content);
rename $tmp_file => $file;
}
sub get_all_cpp_files() {
return grep {
defined($_) && length($_) > 0 && (-f $_)
} map {
chomp;
$_
} qx(ag -U -G $cpp_filename_pattern $ignore_pattern -l);
}
sub group_files($@) {
my ($num_groups, @files) = @_;
my $num_files = scalar(@files);
die "Illegal num_groups($num_groups)" if $num_groups < 1;
if ($num_files == 0) {
return;
}
$num_groups = $num_files if $num_files < $num_groups;
my @groups = map {[]} (1 .. $num_groups);
foreach my $i (0 .. ($num_files - 1)) {
push @{$groups[$i % $num_groups]}, $files[$i];
}
return @groups;
}
sub preprocess_cpp_files(\@) {
my @files = grep {defined($_) && length($_) > 0 && (-f $_) && (-T $_)} @{$_[0]};
foreach my $f (@files) {
my $saved_f = "$f.saved_by_calltree";
rename $f => $saved_f;
write_content($f, read_content($saved_f));
preprocess_one_cpp_file($f);
}
}
sub preprocess_all_cpp_files() {
my @files = get_all_cpp_files();
my @groups = group_files(10, @files);
my $num_groups = scalar(@groups);
return if $num_groups < 1;
my @pids = (undef) x $num_groups;
for (my $i = 0; $i < $num_groups; ++$i) {
my @group = @{$groups[$i]};
my $pid = fork();
if ($pid == 0) {
preprocess_cpp_files(@group);
exit 0;
}
elsif ($pid > 0) {
$pids[$i] = $pid;
}
else {
die "Fail to fork a process: $!";
}
}
for (my $i = 0; $i < $num_groups; ++$i) {
wait;
}
}
sub restore_saved_files() {
my @saved_files = grep {
defined($_) && length($_) > 0 && (-f $_)
} map {
chomp;
$_
} qx(ag -U -G '.+\\.saved_by_calltree\$' $ignore_pattern -l);
foreach my $f (@saved_files) {
my $original_f = substr($f, 0, length($f) - length(".saved_by_calltree"));
rename $f => $original_f;
}
my @tmp_files = grep {
defined($_) && length($_) > 0 && (-f $_)
} map {
chomp;
$_
} qx(ag -U -G '\\.tmp\\.created_by_calltree\$' $ignore_pattern -l);
foreach my $f (@tmp_files) {
unlink $f;
}
}
sub register_abnormal_shutdown_hook() {
my $abnormal_handler = sub {
my $cause = shift;
$cause = red_color($cause);
print qq/Abnormal exit caused by $cause\n/;
@SIG{keys %SIG} = qw/DEFAULT/ x (keys %SIG);
restore_saved_files();
exit 0;
};
my @sig = qw/__DIE__ QUIT INT TERM ABRT/;
@SIG{@sig} = ($abnormal_handler) x scalar(@sig);
}
sub merge_lines_multiline_break_enabled(\@) {
my @lines = @{+shift};
my @three_parts = map {
if (/^([^:]+):(\d+):(.*)$/) {
[ $1, $2, $3 ]
}
else {
undef
}
} @lines;
my ($prev_file, $prev_lineno, $prev_line) = (undef, undef, undef);
# result is array of quadruples: (file, func_start_lineno, func_end_lineno, func_body)
my @result = ();
for (my $i = 0; $i < scalar(@three_parts); ++$i) {
if (!defined($three_parts[$i])) {
if (defined($prev_file)) {
# $i-1 is last line of a match block
push @result, [ $prev_file, $prev_lineno, $three_parts[$i - 1][1], $prev_line ];
($prev_file, $prev_lineno, $prev_line) = (undef, undef, undef);
}
else {
# deplicate multiline-break.
}
}
else {
if (defined($prev_file)) {
# non-first lines of a match block
$prev_line = $prev_line . $three_parts[$i][2];
}
else {
# first line of a match block
($prev_file, $prev_lineno, $prev_line) = @{$three_parts[$i]};
}
}
}
if (defined($prev_file)) {
push @result, [ $prev_file, $prev_lineno, $three_parts[-1][1], $prev_line ];
}
return @result;
}
sub merge_lines_multiline_break_disabled(\@) {
my @lines = @{+shift};
my @three_parts = map {/^([^:]+):(\d+):(.*)$/;
[ $1, $2, $3 ]} @lines;
my ($prev_file, $prev_lineno, $prev_line) = @{$three_parts[0]};
my $prev_lineno_adjacent = $prev_lineno;
my @result = ();
for (my $i = 1; $i < scalar(@three_parts); ++$i) {
my ($file, $lineno, $line) = @{$three_parts[$i]};
if (($file eq $prev_file) && ($prev_lineno_adjacent + 1 == $lineno)) {
$prev_line = $prev_line . $line;
$prev_lineno_adjacent += 1;
}
else {
push @result, [ $prev_file, $prev_lineno, $three_parts[$i][1], $prev_line ];
($prev_file, $prev_lineno, $prev_line) = ($file, $lineno, $line);
$prev_lineno_adjacent = $prev_lineno;
}
}
push @result, [ $prev_file, $prev_lineno, $three_parts[-1][1], $prev_line ];
return @result;
}
sub merge_lines(\@) {
my @lines = @{+shift};
if (multiline_break_enabled()) {
return merge_lines_multiline_break_enabled(@lines);
}
else {
return merge_lines_multiline_break_disabled(@lines);
}
}
sub extract_all_callees($$) {
my ($line, $re_func_call) = @_;
my @callees = ();
while ($line =~ /$re_func_call/g) {
push @callees, { call => $1, prefix => $2, name => $3 };
}
return @callees;
}
sub simple_name($) {
my $name = shift;
$name =~ s/ //g;
$name =~ /(~?\w+\b)$/ ? $1 : $name;
}
sub scope($) {
$_[0] =~ /\b(\w+)\b::\s*(~?\w+\b)$/;
$1
}
sub filename($) {
$_[0] =~ m{/([^/]+)\.\w+:\d+};
$1;
}
sub script_basename() {
get_path_of_script() =~ m{/([^/]+?)(?:\.\w+)?$};
$1
}
sub is_pure_name($) {
all {'a' le $_ && $_ le 'z'} split //, +shift
}
sub extract_all_funcs(\%$$) {
my ($ignored, $trivial_threshold, $length_threshold) = @_;
my $multiline_break = "";
if (multiline_break_enabled()) {
$multiline_break = "--multiline-break";
}
print qq(ag -U $multiline_break -G $cpp_filename_pattern $ignore_pattern '$RE_FUNC_DEFINITION'), "\n";
my @matches = map {
chomp;
$_ . " "
} qx(ag -U $multiline_break -G $cpp_filename_pattern $ignore_pattern '$RE_FUNC_DEFINITION');
printf "extract lines: %d\n", scalar(@matches);
die "Current directory seems not a C/C++ project" if scalar(@matches) == 0;
my @func_file_line_def = merge_lines @matches;
printf "function definition after merge: %d\n", scalar(@func_file_line_def);
my $re_func_def_name = qr!$RE_FUNC_DEFINITION_NAME!;
my @func_def = map {$_->[3]} @func_file_line_def;
my @func_name = map {$_ =~ $re_func_def_name;
$1} @func_def;
my $re_func_call = qr!$RE_FUNC_CALL!;
printf "re_function_call=$RE_FUNC_CALL\n";
printf "process callees: begin\n";
my @func_callees = map {
my (undef, @rest) = extract_all_callees($_, $re_func_call);
[ @rest ]
} @func_def;
printf "process callees: end\n";
# remove trivial functions;
my %func_count = ();
foreach my $callees (@func_callees) {
foreach my $callee (@$callees) {
$func_count{$callee->{name}}++;
}
}
my %trivial = map {$_ => 1} grep {
is_pure_name($_) && ($func_count{$_} > $trivial_threshold || length($_) < $length_threshold)
} (keys %func_count);
my %ignored = (%$ignored, %trivial);
my %reserved = map {$_ => simple_name($_)} grep {!exists $ignored{$_}} (keys %func_count);
my @func_file_line = map {$_->[0] . ":" . $_->[1]} @func_file_line_def;
my @func_simple_name = map {simple_name($_)} @func_name;
my %calling = ();
my %called = ();
# When a function have no callees, we construct a dummy callee [NO_CALLEES] and add it to the
# called, and link this dummy node to the function. It is useful when search matched lines because
# the candidates nodes are picked from map{@$_}values %called.
my $no_callees = "[NO_CALLEES]";
$called{$no_callees} = [];
for (my $i = 0; $i < scalar(@func_name); ++$i) {
my $file_info = $func_file_line[$i];
my $caller_name = $func_name[$i];
my $caller_simple_name = $func_simple_name[$i];
my $scope = scope($caller_name);
my $filename = filename($file_info);
my ($file, $start_lineno, $end_lineno) = @{$func_file_line_def[$i]}[0 .. 2];
my @callees = @{$func_callees[$i]};
foreach my $seq (0 .. $#callees) {$callees[$seq]{seq} = $seq}
my %callees = map {
if (defined($_->{prefix})) {
$_->{prefix} . "/" . $_->{name} => $_
}
else {
$_->{name} => $_
}
} grep {exists $reserved{$_->{name}}} @callees;
@callees = values %callees;
@callees = sort {$a->{seq} <=> $b->{seq}} @callees;
my %callee_name2simple = map {$_->{name} => simple_name($_->{name})} @callees;
my $caller_node = {
name => $caller_name,
simple_name => $caller_simple_name,
scope => $scope,
file_info => $file_info,
file => $file,
start_lineno => $start_lineno,
end_lineno => $end_lineno,
filename => $filename,
callees => [ @callees ],
};
if (!exists $calling{$caller_name}) {
$calling{$caller_name} = [];
}
push @{$calling{$caller_name}}, $caller_node;
if ($caller_name ne $caller_simple_name) {
if (!exists $calling{$caller_simple_name}) {
$calling{$caller_simple_name} = [];
}
push @{$calling{$caller_simple_name}}, $caller_node;
}
my %processed_callee_names = ();
for my $callee (@callees) {
my $callee_name = $callee->{name};
my $callee_simple_name = $callee_name2simple{$callee_name};
if (!exists $called{$callee_name}) {
$called{$callee_name} = [];
}
push @{$called{$callee_name}}, $caller_node;
$processed_callee_names{$callee_name} = 1;
if (($callee_name ne $callee_simple_name) && !exists $processed_callee_names{$callee_simple_name}) {
if (!exists $called{$callee_simple_name}) {
$called{$callee_simple_name} = [];
}
push @{$called{$callee_simple_name}}, $caller_node;
$processed_callee_names{$callee_simple_name} = 1;
}
}
if (scalar(@callees) == 0) {
push @{$called{$no_callees}}, $caller_node;
}
}
my $calling_names = [ sort {$a cmp $b} keys %calling ];
my $called_names = [ sort {$a cmp $b} keys %called ];
return (\%calling, \%called, $calling_names, $called_names);
}
sub get_cached_or_extract_all_funcs(\%$$) {
my ($ignored, $trivial_threshold, $length_threshold) = @_;
restore_saved_files();
$trivial_threshold = int($trivial_threshold);
$length_threshold = int($length_threshold);
my $suffix = "$trivial_threshold.$length_threshold";
my $script_basename = script_basename();
my $file = ".$script_basename.summary.$suffix.dat";
my @key = ((sort {$a cmp $b} keys %$ignored), $trivial_threshold, $length_threshold);
my $do_summary = sub() {
print "preprocess_all_cpp_files\n";
preprocess_all_cpp_files();
print "register_abnormal_shutdown_hook\n";
register_abnormal_shutdown_hook();
print "extract_all_funcs: begin\n";
my @result =
extract_all_funcs(%$ignored, $trivial_threshold, $length_threshold);
print "extract_all_funcs: end\n";
@SIG{keys %SIG} = qw/DEFAULT/ x (keys %SIG);
restore_saved_files();
return @result;
};
my @result = get_cache_or_run_keyed(@key, $file, $do_summary);
return @result;
}
my @ignored = (
qw(for if while switch catch),
qw(VLOG LOG log warn log trace debug defined warn error fatal),
qw(static_cast reinterpret_cast const_cast dynamic_cast),
qw(return assert sizeof alignas),
qw(constexpr),
qw(set get),
qw(printf assert ASSERT),
qw(CHECK DCHECK_LT DCHECK DCHECK_EQ DCHECK_GT DCHECK_NE),
qw(UNLIKELY LIKELY unlikely likely)
);
sub get_env_or_default(&$$) {
my ($chk, $key, $default) = @_;
if (exists $ENV{$key}) {
my $value = $ENV{$key};
map {$chk->($_)} ($value);
return $value;
}
else {
return $default;
}
}
my $env_trivial_threshold = get_env_or_default {
die "Invariant 'calltree_trivial_threshold($_) > 0' is violated" unless int($_) > 0;
} qw/calltree_trivial_threshold 50/;
my $env_length_threshold = get_env_or_default {
die "Invalid 'calltree_length_threshold($_) > 1' is violated" unless int($_) > 1;
} qw/calltree_length_threshold 3/;
my %ignored = map {$_ => 1} @ignored;
my ($Global_calling, $Global_called, $Global_calling_names, $Global_called_names) = (undef, undef, undef, undef);
my $Global_pruned_cache = {};
my $Global_pruned_subtrees = {};
my $Global_common_quiet = 0;
my $Global_common_height = 0;
my $Global_common_count = 0;
sub should_prune_subtree($$) {
my ($node, $enable_prune) = @_;
if ($enable_prune && exists($node->{cache_key}) && exists($Global_pruned_cache->{$node->{cache_key}})) {
my $cache_key = $node->{cache_key};
my $cached_node = $Global_pruned_cache->{$cache_key};
if ($cached_node->{height} >= $Global_common_height && $cached_node->{count} >= $Global_common_count) {
if (!exists($Global_pruned_subtrees->{$cache_key})) {
$Global_pruned_subtrees->{$cache_key} = $cached_node;
my $idx = scalar(keys %$Global_pruned_subtrees) - 1;
$cached_node->{common_idx} = $idx;
}
return ($cached_node->{common_idx});
}
}
return ();
}
sub sub_tree($$$$$$$$) {
my ($graph, $node, $level, $depth, $path, $get_id_and_child, $install_child, $pruned) = @_;
my ($matched, $node_id, @child) = $get_id_and_child->($graph, $node);
# Assume the subtree is height of 1
$node->{height} = 1;
return undef unless defined($node_id);
$node->{leaf} = "internal";
if (scalar(@child) == 0 || ($level + 1) >= $depth || exists $path->{$node_id}) {
if (scalar(@child) == 0) {
$node->{leaf} = "outermost";
}
elsif (($level + 1) >= $depth) {
$node->{leaf} = "deep";
}
elsif (exists $path->{$node_id}) {
$node->{leaf} = "recursive";
}
else {
# never reach here;
}
return $matched ? $node : undef;
}
my $ref = sub() {
$level++;
# add node_id to path;
$path->{$node_id} = 1;
};
my $unref = sub() {
$level--;
# delete node_id from path;
delete $path->{$node_id};
};
my $raii = RAII->new($ref, $unref);
my @child_nodes = ();
my $unique_name = $node->{file_info} . "::" . $node->{name};
if (defined($pruned) && exists($pruned->{$unique_name})) {
my $cached_node = $pruned->{$unique_name};
# return undef if the current node is pruned
if (!defined($cached_node)) {
return undef;
}
else {
$cached_node->{count} += 1;
$node->{cache_key} = $unique_name;
$node->{cache_seqno} = $cached_node->{count};
$node->{height} = $cached_node->{height};
return $node;
}
}
else {
foreach my $chd (@child) {
push @child_nodes, &sub_tree($graph, $chd, $level, $depth, $path, $get_id_and_child, $install_child, $pruned);
}
}
@child_nodes = grep {defined($_)} @child_nodes;
if (@child_nodes) {
$install_child->($node, [ @child_nodes ]);
$node->{height} = max(map {$_->{height}} @child_nodes) + 1;
$node->{count} = 1;
if (defined($pruned)) {
$node->{cache_key} = $unique_name;
$pruned->{$unique_name} = $node;
}
return $node;
}
else {
$install_child->($node, []);
$node->{height} = 1;
$node->{count} = 1;
$node->{cache_key} = $unique_name if defined($pruned);
my $opt_node = ($matched || $level == 1) ? $node : undef;
if ($node->{leaf} eq "internal") {
$pruned->{$unique_name} = $opt_node if defined($pruned);
}
return $opt_node;
}
}
sub eliminate_empty_children($) {
my ($root) = @_;
unless (defined($root) && exists($root->{child})) {
return $root;
}
$root->{child} = [ grep {defined($_) && (!exists($_->{child}) || scalar(@{$_->{child}}) > 0)} @{$root->{child}} ];
if (scalar(@{$root->{child}}) > 0) {
return $root;
}
else {