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#! /usr/bin/env perl
# Copyright (c) 1998-2007, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# ---
# Program for printing the profile generated by common/profiler.cc,
# or by the heap profiler (common/debugallocation.cc)
#
# The profile contains a sequence of entries of the form:
# <count> <stack trace>
# This program parses the profile, and generates user-readable
# output.
#
# Examples:
#
# % tools/jeprof "program" "profile"
# Enters "interactive" mode
#
# % tools/jeprof --text "program" "profile"
# Generates one line per procedure
#
# % tools/jeprof --gv "program" "profile"
# Generates annotated call-graph and displays via "gv"
#
# % tools/jeprof --gv --focus=Mutex "program" "profile"
# Restrict to code paths that involve an entry that matches "Mutex"
#
# % tools/jeprof --gv --focus=Mutex --ignore=string "program" "profile"
# Restrict to code paths that involve an entry that matches "Mutex"
# and does not match "string"
#
# % tools/jeprof --list=IBF_CheckDocid "program" "profile"
# Generates disassembly listing of all routines with at least one
# sample that match the --list=<regexp> pattern. The listing is
# annotated with the flat and cumulative sample counts at each line.
#
# % tools/jeprof --disasm=IBF_CheckDocid "program" "profile"
# Generates disassembly listing of all routines with at least one
# sample that match the --disasm=<regexp> pattern. The listing is
# annotated with the flat and cumulative sample counts at each PC value.
#
# TODO: Use color to indicate files?
use strict;
use warnings;
use Getopt::Long;
my $JEPROF_VERSION = "@jemalloc_version@";
my $PPROF_VERSION = "2.0";
# These are the object tools we use which can come from a
# user-specified location using --tools, from the JEPROF_TOOLS
# environment variable, or from the environment.
my %obj_tool_map = (
"objdump" => "objdump",
"nm" => "nm",
"addr2line" => "addr2line",
"c++filt" => "c++filt",
## ConfigureObjTools may add architecture-specific entries:
#"nm_pdb" => "nm-pdb", # for reading windows (PDB-format) executables
#"addr2line_pdb" => "addr2line-pdb", # ditto
#"otool" => "otool", # equivalent of objdump on OS X
);
# NOTE: these are lists, so you can put in commandline flags if you want.
my @DOT = ("dot"); # leave non-absolute, since it may be in /usr/local
my @GV = ("gv");
my @EVINCE = ("evince"); # could also be xpdf or perhaps acroread
my @KCACHEGRIND = ("kcachegrind");
my @PS2PDF = ("ps2pdf");
# These are used for dynamic profiles
my @URL_FETCHER = ("curl", "-s", "--fail");
# These are the web pages that servers need to support for dynamic profiles
my $HEAP_PAGE = "/pprof/heap";
my $PROFILE_PAGE = "/pprof/profile"; # must support cgi-param "?seconds=#"
my $PMUPROFILE_PAGE = "/pprof/pmuprofile(?:\\?.*)?"; # must support cgi-param
# ?seconds=#&event=x&period=n
my $GROWTH_PAGE = "/pprof/growth";
my $CONTENTION_PAGE = "/pprof/contention";
my $WALL_PAGE = "/pprof/wall(?:\\?.*)?"; # accepts options like namefilter
my $FILTEREDPROFILE_PAGE = "/pprof/filteredprofile(?:\\?.*)?";
my $CENSUSPROFILE_PAGE = "/pprof/censusprofile(?:\\?.*)?"; # must support cgi-param
# "?seconds=#",
# "?tags_regexp=#" and
# "?type=#".
my $SYMBOL_PAGE = "/pprof/symbol"; # must support symbol lookup via POST
my $PROGRAM_NAME_PAGE = "/pprof/cmdline";
# These are the web pages that can be named on the command line.
# All the alternatives must begin with /.
my $PROFILES = "($HEAP_PAGE|$PROFILE_PAGE|$PMUPROFILE_PAGE|" .
"$GROWTH_PAGE|$CONTENTION_PAGE|$WALL_PAGE|" .
"$FILTEREDPROFILE_PAGE|$CENSUSPROFILE_PAGE)";
# default binary name
my $UNKNOWN_BINARY = "(unknown)";
# There is a pervasive dependency on the length (in hex characters,
# i.e., nibbles) of an address, distinguishing between 32-bit and
# 64-bit profiles. To err on the safe size, default to 64-bit here:
my $address_length = 16;
my $dev_null = "/dev/null";
if (! -e $dev_null && $^O =~ /MSWin/) { # $^O is the OS perl was built for
$dev_null = "nul";
}
# A list of paths to search for shared object files
my @prefix_list = ();
# Special routine name that should not have any symbols.
# Used as separator to parse "addr2line -i" output.
my $sep_symbol = '_fini';
my $sep_address = undef;
##### Argument parsing #####
sub usage_string {
return <<EOF;
Usage:
jeprof [options] <program> <profiles>
<profiles> is a space separated list of profile names.
jeprof [options] <symbolized-profiles>
<symbolized-profiles> is a list of profile files where each file contains
the necessary symbol mappings as well as profile data (likely generated
with --raw).
jeprof [options] <profile>
<profile> is a remote form. Symbols are obtained from host:port$SYMBOL_PAGE
Each name can be:
/path/to/profile - a path to a profile file
host:port[/<service>] - a location of a service to get profile from
The /<service> can be $HEAP_PAGE, $PROFILE_PAGE, /pprof/pmuprofile,
$GROWTH_PAGE, $CONTENTION_PAGE, /pprof/wall,
$CENSUSPROFILE_PAGE, or /pprof/filteredprofile.
For instance:
jeprof http://myserver.com:80$HEAP_PAGE
If /<service> is omitted, the service defaults to $PROFILE_PAGE (cpu profiling).
jeprof --symbols <program>
Maps addresses to symbol names. In this mode, stdin should be a
list of library mappings, in the same format as is found in the heap-
and cpu-profile files (this loosely matches that of /proc/self/maps
on linux), followed by a list of hex addresses to map, one per line.
For more help with querying remote servers, including how to add the
necessary server-side support code, see this filename (or one like it):
/usr/doc/gperftools-$PPROF_VERSION/pprof_remote_servers.html
Options:
--cum Sort by cumulative data
--base=<base> Subtract <base> from <profile> before display
--interactive Run in interactive mode (interactive "help" gives help) [default]
--seconds=<n> Length of time for dynamic profiles [default=30 secs]
--add_lib=<file> Read additional symbols and line info from the given library
--lib_prefix=<dir> Comma separated list of library path prefixes
Reporting Granularity:
--addresses Report at address level
--lines Report at source line level
--functions Report at function level [default]
--files Report at source file level
Output type:
--text Generate text report
--callgrind Generate callgrind format to stdout
--gv Generate Postscript and display
--evince Generate PDF and display
--web Generate SVG and display
--list=<regexp> Generate source listing of matching routines
--disasm=<regexp> Generate disassembly of matching routines
--symbols Print demangled symbol names found at given addresses
--dot Generate DOT file to stdout
--ps Generate Postcript to stdout
--pdf Generate PDF to stdout
--svg Generate SVG to stdout
--gif Generate GIF to stdout
--raw Generate symbolized jeprof data (useful with remote fetch)
Heap-Profile Options:
--inuse_space Display in-use (mega)bytes [default]
--inuse_objects Display in-use objects
--alloc_space Display allocated (mega)bytes
--alloc_objects Display allocated objects
--show_bytes Display space in bytes
--drop_negative Ignore negative differences
Contention-profile options:
--total_delay Display total delay at each region [default]
--contentions Display number of delays at each region
--mean_delay Display mean delay at each region
Call-graph Options:
--nodecount=<n> Show at most so many nodes [default=80]
--nodefraction=<f> Hide nodes below <f>*total [default=.005]
--edgefraction=<f> Hide edges below <f>*total [default=.001]
--maxdegree=<n> Max incoming/outgoing edges per node [default=8]
--focus=<regexp> Focus on backtraces with nodes matching <regexp>
--thread=<n> Show profile for thread <n>
--ignore=<regexp> Ignore backtraces with nodes matching <regexp>
--scale=<n> Set GV scaling [default=0]
--heapcheck Make nodes with non-0 object counts
(i.e. direct leak generators) more visible
--retain=<regexp> Retain only nodes that match <regexp>
--exclude=<regexp> Exclude all nodes that match <regexp>
Miscellaneous:
--tools=<prefix or binary:fullpath>[,...] \$PATH for object tool pathnames
--test Run unit tests
--help This message
--version Version information
Environment Variables:
JEPROF_TMPDIR Profiles directory. Defaults to \$HOME/jeprof
JEPROF_TOOLS Prefix for object tools pathnames
Examples:
jeprof /bin/ls ls.prof
Enters "interactive" mode
jeprof --text /bin/ls ls.prof
Outputs one line per procedure
jeprof --web /bin/ls ls.prof
Displays annotated call-graph in web browser
jeprof --gv /bin/ls ls.prof
Displays annotated call-graph via 'gv'
jeprof --gv --focus=Mutex /bin/ls ls.prof
Restricts to code paths including a .*Mutex.* entry
jeprof --gv --focus=Mutex --ignore=string /bin/ls ls.prof
Code paths including Mutex but not string
jeprof --list=getdir /bin/ls ls.prof
(Per-line) annotated source listing for getdir()
jeprof --disasm=getdir /bin/ls ls.prof
(Per-PC) annotated disassembly for getdir()
jeprof http://localhost:1234/
Enters "interactive" mode
jeprof --text localhost:1234
Outputs one line per procedure for localhost:1234
jeprof --raw localhost:1234 > ./local.raw
jeprof --text ./local.raw
Fetches a remote profile for later analysis and then
analyzes it in text mode.
EOF
}
sub version_string {
return <<EOF
jeprof (part of jemalloc $JEPROF_VERSION)
based on pprof (part of gperftools $PPROF_VERSION)
Copyright 1998-2007 Google Inc.
This is BSD licensed software; see the source for copying conditions
and license information.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
EOF
}
sub usage {
my $msg = shift;
print STDERR "$msg\n\n";
print STDERR usage_string();
print STDERR "\nFATAL ERROR: $msg\n"; # just as a reminder
exit(1);
}
sub Init() {
# Setup tmp-file name and handler to clean it up.
# We do this in the very beginning so that we can use
# error() and cleanup() function anytime here after.
$main::tmpfile_sym = "/tmp/jeprof$$.sym";
$main::tmpfile_ps = "/tmp/jeprof$$";
$main::next_tmpfile = 0;
$SIG{'INT'} = \&sighandler;
# Cache from filename/linenumber to source code
$main::source_cache = ();
$main::opt_help = 0;
$main::opt_version = 0;
$main::opt_cum = 0;
$main::opt_base = '';
$main::opt_addresses = 0;
$main::opt_lines = 0;
$main::opt_functions = 0;
$main::opt_files = 0;
$main::opt_lib_prefix = "";
$main::opt_text = 0;
$main::opt_callgrind = 0;
$main::opt_list = "";
$main::opt_disasm = "";
$main::opt_symbols = 0;
$main::opt_gv = 0;
$main::opt_evince = 0;
$main::opt_web = 0;
$main::opt_dot = 0;
$main::opt_ps = 0;
$main::opt_pdf = 0;
$main::opt_gif = 0;
$main::opt_svg = 0;
$main::opt_raw = 0;
$main::opt_nodecount = 80;
$main::opt_nodefraction = 0.005;
$main::opt_edgefraction = 0.001;
$main::opt_maxdegree = 8;
$main::opt_focus = '';
$main::opt_thread = undef;
$main::opt_ignore = '';
$main::opt_scale = 0;
$main::opt_heapcheck = 0;
$main::opt_retain = '';
$main::opt_exclude = '';
$main::opt_seconds = 30;
$main::opt_lib = "";
$main::opt_inuse_space = 0;
$main::opt_inuse_objects = 0;
$main::opt_alloc_space = 0;
$main::opt_alloc_objects = 0;
$main::opt_show_bytes = 0;
$main::opt_drop_negative = 0;
$main::opt_interactive = 0;
$main::opt_total_delay = 0;
$main::opt_contentions = 0;
$main::opt_mean_delay = 0;
$main::opt_tools = "";
$main::opt_debug = 0;
$main::opt_test = 0;
# These are undocumented flags used only by unittests.
$main::opt_test_stride = 0;
# Are we using $SYMBOL_PAGE?
$main::use_symbol_page = 0;
# Files returned by TempName.
%main::tempnames = ();
# Type of profile we are dealing with
# Supported types:
# cpu
# heap
# growth
# contention
$main::profile_type = ''; # Empty type means "unknown"
GetOptions("help!" => \$main::opt_help,
"version!" => \$main::opt_version,
"cum!" => \$main::opt_cum,
"base=s" => \$main::opt_base,
"seconds=i" => \$main::opt_seconds,
"add_lib=s" => \$main::opt_lib,
"lib_prefix=s" => \$main::opt_lib_prefix,
"functions!" => \$main::opt_functions,
"lines!" => \$main::opt_lines,
"addresses!" => \$main::opt_addresses,
"files!" => \$main::opt_files,
"text!" => \$main::opt_text,
"callgrind!" => \$main::opt_callgrind,
"list=s" => \$main::opt_list,
"disasm=s" => \$main::opt_disasm,
"symbols!" => \$main::opt_symbols,
"gv!" => \$main::opt_gv,
"evince!" => \$main::opt_evince,
"web!" => \$main::opt_web,
"dot!" => \$main::opt_dot,
"ps!" => \$main::opt_ps,
"pdf!" => \$main::opt_pdf,
"svg!" => \$main::opt_svg,
"gif!" => \$main::opt_gif,
"raw!" => \$main::opt_raw,
"interactive!" => \$main::opt_interactive,
"nodecount=i" => \$main::opt_nodecount,
"nodefraction=f" => \$main::opt_nodefraction,
"edgefraction=f" => \$main::opt_edgefraction,
"maxdegree=i" => \$main::opt_maxdegree,
"focus=s" => \$main::opt_focus,
"thread=s" => \$main::opt_thread,
"ignore=s" => \$main::opt_ignore,
"scale=i" => \$main::opt_scale,
"heapcheck" => \$main::opt_heapcheck,
"retain=s" => \$main::opt_retain,
"exclude=s" => \$main::opt_exclude,
"inuse_space!" => \$main::opt_inuse_space,
"inuse_objects!" => \$main::opt_inuse_objects,
"alloc_space!" => \$main::opt_alloc_space,
"alloc_objects!" => \$main::opt_alloc_objects,
"show_bytes!" => \$main::opt_show_bytes,
"drop_negative!" => \$main::opt_drop_negative,
"total_delay!" => \$main::opt_total_delay,
"contentions!" => \$main::opt_contentions,
"mean_delay!" => \$main::opt_mean_delay,
"tools=s" => \$main::opt_tools,
"test!" => \$main::opt_test,
"debug!" => \$main::opt_debug,
# Undocumented flags used only by unittests:
"test_stride=i" => \$main::opt_test_stride,
) || usage("Invalid option(s)");
# Deal with the standard --help and --version
if ($main::opt_help) {
print usage_string();
exit(0);
}
if ($main::opt_version) {
print version_string();
exit(0);
}
# Disassembly/listing/symbols mode requires address-level info
if ($main::opt_disasm || $main::opt_list || $main::opt_symbols) {
$main::opt_functions = 0;
$main::opt_lines = 0;
$main::opt_addresses = 1;
$main::opt_files = 0;
}
# Check heap-profiling flags
if ($main::opt_inuse_space +
$main::opt_inuse_objects +
$main::opt_alloc_space +
$main::opt_alloc_objects > 1) {
usage("Specify at most on of --inuse/--alloc options");
}
# Check output granularities
my $grains =
$main::opt_functions +
$main::opt_lines +
$main::opt_addresses +
$main::opt_files +
0;
if ($grains > 1) {
usage("Only specify one output granularity option");
}
if ($grains == 0) {
$main::opt_functions = 1;
}
# Check output modes
my $modes =
$main::opt_text +
$main::opt_callgrind +
($main::opt_list eq '' ? 0 : 1) +
($main::opt_disasm eq '' ? 0 : 1) +
($main::opt_symbols == 0 ? 0 : 1) +
$main::opt_gv +
$main::opt_evince +
$main::opt_web +
$main::opt_dot +
$main::opt_ps +
$main::opt_pdf +
$main::opt_svg +
$main::opt_gif +
$main::opt_raw +
$main::opt_interactive +
0;
if ($modes > 1) {
usage("Only specify one output mode");
}
if ($modes == 0) {
if (-t STDOUT) { # If STDOUT is a tty, activate interactive mode
$main::opt_interactive = 1;
} else {
$main::opt_text = 1;
}
}
if ($main::opt_test) {
RunUnitTests();
# Should not return
exit(1);
}
# Binary name and profile arguments list
$main::prog = "";
@main::pfile_args = ();
# Remote profiling without a binary (using $SYMBOL_PAGE instead)
if (@ARGV > 0) {
if (IsProfileURL($ARGV[0])) {
$main::use_symbol_page = 1;
} elsif (IsSymbolizedProfileFile($ARGV[0])) {
$main::use_symbolized_profile = 1;
$main::prog = $UNKNOWN_BINARY; # will be set later from the profile file
}
}
if ($main::use_symbol_page || $main::use_symbolized_profile) {
# We don't need a binary!
my %disabled = ('--lines' => $main::opt_lines,
'--disasm' => $main::opt_disasm);
for my $option (keys %disabled) {
usage("$option cannot be used without a binary") if $disabled{$option};
}
# Set $main::prog later...
scalar(@ARGV) || usage("Did not specify profile file");
} elsif ($main::opt_symbols) {
# --symbols needs a binary-name (to run nm on, etc) but not profiles
$main::prog = shift(@ARGV) || usage("Did not specify program");
} else {
$main::prog = shift(@ARGV) || usage("Did not specify program");
scalar(@ARGV) || usage("Did not specify profile file");
}
# Parse profile file/location arguments
foreach my $farg (@ARGV) {
if ($farg =~ m/(.*)\@([0-9]+)(|\/.*)$/ ) {
my $machine = $1;
my $num_machines = $2;
my $path = $3;
for (my $i = 0; $i < $num_machines; $i++) {
unshift(@main::pfile_args, "$i.$machine$path");
}
} else {
unshift(@main::pfile_args, $farg);
}
}
if ($main::use_symbol_page) {
unless (IsProfileURL($main::pfile_args[0])) {
error("The first profile should be a remote form to use $SYMBOL_PAGE\n");
}
CheckSymbolPage();
$main::prog = FetchProgramName();
} elsif (!$main::use_symbolized_profile) { # may not need objtools!
ConfigureObjTools($main::prog)
}
# Break the opt_lib_prefix into the prefix_list array
@prefix_list = split (',', $main::opt_lib_prefix);
# Remove trailing / from the prefixes, in the list to prevent
# searching things like /my/path//lib/mylib.so
foreach (@prefix_list) {
s|/+$||;
}
}
sub FilterAndPrint {
my ($profile, $symbols, $libs, $thread) = @_;
# Get total data in profile
my $total = TotalProfile($profile);
# Remove uniniteresting stack items
$profile = RemoveUninterestingFrames($symbols, $profile);
# Focus?
if ($main::opt_focus ne '') {
$profile = FocusProfile($symbols, $profile, $main::opt_focus);
}
# Ignore?
if ($main::opt_ignore ne '') {
$profile = IgnoreProfile($symbols, $profile, $main::opt_ignore);
}
my $calls = ExtractCalls($symbols, $profile);
# Reduce profiles to required output granularity, and also clean
# each stack trace so a given entry exists at most once.
my $reduced = ReduceProfile($symbols, $profile);
# Get derived profiles
my $flat = FlatProfile($reduced);
my $cumulative = CumulativeProfile($reduced);
# Print
if (!$main::opt_interactive) {
if ($main::opt_disasm) {
PrintDisassembly($libs, $flat, $cumulative, $main::opt_disasm);
} elsif ($main::opt_list) {
PrintListing($total, $libs, $flat, $cumulative, $main::opt_list, 0);
} elsif ($main::opt_text) {
# Make sure the output is empty when have nothing to report
# (only matters when --heapcheck is given but we must be
# compatible with old branches that did not pass --heapcheck always):
if ($total != 0) {
printf("Total%s: %s %s\n",
(defined($thread) ? " (t$thread)" : ""),
Unparse($total), Units());
}
PrintText($symbols, $flat, $cumulative, -1);
} elsif ($main::opt_raw) {
PrintSymbolizedProfile($symbols, $profile, $main::prog);
} elsif ($main::opt_callgrind) {
PrintCallgrind($calls);
} else {
if (PrintDot($main::prog, $symbols, $profile, $flat, $cumulative, $total)) {
if ($main::opt_gv) {
RunGV(TempName($main::next_tmpfile, "ps"), "");
} elsif ($main::opt_evince) {
RunEvince(TempName($main::next_tmpfile, "pdf"), "");
} elsif ($main::opt_web) {
my $tmp = TempName($main::next_tmpfile, "svg");
RunWeb($tmp);
# The command we run might hand the file name off
# to an already running browser instance and then exit.
# Normally, we'd remove $tmp on exit (right now),
# but fork a child to remove $tmp a little later, so that the
# browser has time to load it first.
delete $main::tempnames{$tmp};
if (fork() == 0) {
sleep 5;
unlink($tmp);
exit(0);
}
}
} else {
cleanup();
exit(1);
}
}
} else {
InteractiveMode($profile, $symbols, $libs, $total);
}
}
sub Main() {
Init();
$main::collected_profile = undef;
@main::profile_files = ();
$main::op_time = time();
# Printing symbols is special and requires a lot less info that most.
if ($main::opt_symbols) {
PrintSymbols(*STDIN); # Get /proc/maps and symbols output from stdin
return;
}
# Fetch all profile data
FetchDynamicProfiles();
# this will hold symbols that we read from the profile files
my $symbol_map = {};
# Read one profile, pick the last item on the list
my $data = ReadProfile($main::prog, pop(@main::profile_files));
my $profile = $data->{profile};
my $pcs = $data->{pcs};
my $libs = $data->{libs}; # Info about main program and shared libraries
$symbol_map = MergeSymbols($symbol_map, $data->{symbols});
# Add additional profiles, if available.
if (scalar(@main::profile_files) > 0) {
foreach my $pname (@main::profile_files) {
my $data2 = ReadProfile($main::prog, $pname);
$profile = AddProfile($profile, $data2->{profile});
$pcs = AddPcs($pcs, $data2->{pcs});
$symbol_map = MergeSymbols($symbol_map, $data2->{symbols});
}
}
# Subtract base from profile, if specified
if ($main::opt_base ne '') {
my $base = ReadProfile($main::prog, $main::opt_base);
$profile = SubtractProfile($profile, $base->{profile});
$pcs = AddPcs($pcs, $base->{pcs});
$symbol_map = MergeSymbols($symbol_map, $base->{symbols});
}
# Collect symbols
my $symbols;
if ($main::use_symbolized_profile) {
$symbols = FetchSymbols($pcs, $symbol_map);
} elsif ($main::use_symbol_page) {
$symbols = FetchSymbols($pcs);
} else {
# TODO(csilvers): $libs uses the /proc/self/maps data from profile1,
# which may differ from the data from subsequent profiles, especially
# if they were run on different machines. Use appropriate libs for
# each pc somehow.
$symbols = ExtractSymbols($libs, $pcs);
}
if (!defined($main::opt_thread)) {
FilterAndPrint($profile, $symbols, $libs);
}
if (defined($data->{threads})) {
foreach my $thread (sort { $a <=> $b } keys(%{$data->{threads}})) {
if (defined($main::opt_thread) &&
($main::opt_thread eq '*' || $main::opt_thread == $thread)) {
my $thread_profile = $data->{threads}{$thread};
FilterAndPrint($thread_profile, $symbols, $libs, $thread);
}
}
}
cleanup();
exit(0);
}
##### Entry Point #####
Main();
# Temporary code to detect if we're running on a Goobuntu system.
# These systems don't have the right stuff installed for the special
# Readline libraries to work, so as a temporary workaround, we default
# to using the normal stdio code, rather than the fancier readline-based
# code
sub ReadlineMightFail {
if (-e '/lib/libtermcap.so.2') {
return 0; # libtermcap exists, so readline should be okay
} else {
return 1;
}
}
sub RunGV {
my $fname = shift;
my $bg = shift; # "" or " &" if we should run in background
if (!system(ShellEscape(@GV, "--version") . " >$dev_null 2>&1")) {
# Options using double dash are supported by this gv version.
# Also, turn on noantialias to better handle bug in gv for
# postscript files with large dimensions.
# TODO: Maybe we should not pass the --noantialias flag
# if the gv version is known to work properly without the flag.
system(ShellEscape(@GV, "--scale=$main::opt_scale", "--noantialias", $fname)
. $bg);
} else {
# Old gv version - only supports options that use single dash.
print STDERR ShellEscape(@GV, "-scale", $main::opt_scale) . "\n";
system(ShellEscape(@GV, "-scale", "$main::opt_scale", $fname) . $bg);
}
}
sub RunEvince {
my $fname = shift;
my $bg = shift; # "" or " &" if we should run in background
system(ShellEscape(@EVINCE, $fname) . $bg);
}
sub RunWeb {
my $fname = shift;
print STDERR "Loading web page file:///$fname\n";
if (`uname` =~ /Darwin/) {
# OS X: open will use standard preference for SVG files.
system("/usr/bin/open", $fname);
return;
}
# Some kind of Unix; try generic symlinks, then specific browsers.
# (Stop once we find one.)
# Works best if the browser is already running.
my @alt = (
"/etc/alternatives/gnome-www-browser",
"/etc/alternatives/x-www-browser",
"google-chrome",
"firefox",
);
foreach my $b (@alt) {
if (system($b, $fname) == 0) {
return;
}
}
print STDERR "Could not load web browser.\n";
}
sub RunKcachegrind {
my $fname = shift;
my $bg = shift; # "" or " &" if we should run in background
print STDERR "Starting '@KCACHEGRIND " . $fname . $bg . "'\n";
system(ShellEscape(@KCACHEGRIND, $fname) . $bg);
}
##### Interactive helper routines #####
sub InteractiveMode {
$| = 1; # Make output unbuffered for interactive mode
my ($orig_profile, $symbols, $libs, $total) = @_;
print STDERR "Welcome to jeprof! For help, type 'help'.\n";
# Use ReadLine if it's installed and input comes from a console.
if ( -t STDIN &&
!ReadlineMightFail() &&
defined(eval {require Term::ReadLine}) ) {
my $term = new Term::ReadLine 'jeprof';
while ( defined ($_ = $term->readline('(jeprof) '))) {
$term->addhistory($_) if /\S/;
if (!InteractiveCommand($orig_profile, $symbols, $libs, $total, $_)) {
last; # exit when we get an interactive command to quit
}
}
} else { # don't have readline
while (1) {
print STDERR "(jeprof) ";
$_ = <STDIN>;
last if ! defined $_ ;
s/\r//g; # turn windows-looking lines into unix-looking lines
# Save some flags that might be reset by InteractiveCommand()
my $save_opt_lines = $main::opt_lines;
if (!InteractiveCommand($orig_profile, $symbols, $libs, $total, $_)) {
last; # exit when we get an interactive command to quit
}
# Restore flags
$main::opt_lines = $save_opt_lines;
}
}
}
# Takes two args: orig profile, and command to run.
# Returns 1 if we should keep going, or 0 if we were asked to quit
sub InteractiveCommand {
my($orig_profile, $symbols, $libs, $total, $command) = @_;
$_ = $command; # just to make future m//'s easier
if (!defined($_)) {
print STDERR "\n";
return 0;
}
if (m/^\s*quit/) {
return 0;
}
if (m/^\s*help/) {
InteractiveHelpMessage();
return 1;
}
# Clear all the mode options -- mode is controlled by "$command"
$main::opt_text = 0;
$main::opt_callgrind = 0;
$main::opt_disasm = 0;
$main::opt_list = 0;
$main::opt_gv = 0;
$main::opt_evince = 0;
$main::opt_cum = 0;
if (m/^\s*(text|top)(\d*)\s*(.*)/) {
$main::opt_text = 1;
my $line_limit = ($2 ne "") ? int($2) : 10;
my $routine;
my $ignore;
($routine, $ignore) = ParseInteractiveArgs($3);
my $profile = ProcessProfile($total, $orig_profile, $symbols, "", $ignore);
my $reduced = ReduceProfile($symbols, $profile);
# Get derived profiles
my $flat = FlatProfile($reduced);
my $cumulative = CumulativeProfile($reduced);
PrintText($symbols, $flat, $cumulative, $line_limit);
return 1;
}
if (m/^\s*callgrind\s*([^ \n]*)/) {
$main::opt_callgrind = 1;
# Get derived profiles
my $calls = ExtractCalls($symbols, $orig_profile);
my $filename = $1;
if ( $1 eq '' ) {
$filename = TempName($main::next_tmpfile, "callgrind");
}
PrintCallgrind($calls, $filename);
if ( $1 eq '' ) {
RunKcachegrind($filename, " & ");
$main::next_tmpfile++;
}
return 1;
}
if (m/^\s*(web)?list\s*(.+)/) {
my $html = (defined($1) && ($1 eq "web"));
$main::opt_list = 1;
my $routine;
my $ignore;
($routine, $ignore) = ParseInteractiveArgs($2);
my $profile = ProcessProfile($total, $orig_profile, $symbols, "", $ignore);
my $reduced = ReduceProfile($symbols, $profile);
# Get derived profiles
my $flat = FlatProfile($reduced);
my $cumulative = CumulativeProfile($reduced);
PrintListing($total, $libs, $flat, $cumulative, $routine, $html);
return 1;
}
if (m/^\s*disasm\s*(.+)/) {
$main::opt_disasm = 1;
my $routine;
my $ignore;
($routine, $ignore) = ParseInteractiveArgs($1);
# Process current profile to account for various settings
my $profile = ProcessProfile($total, $orig_profile, $symbols, "", $ignore);
my $reduced = ReduceProfile($symbols, $profile);
# Get derived profiles
my $flat = FlatProfile($reduced);
my $cumulative = CumulativeProfile($reduced);
PrintDisassembly($libs, $flat, $cumulative, $routine);
return 1;
}
if (m/^\s*(gv|web|evince)\s*(.*)/) {
$main::opt_gv = 0;
$main::opt_evince = 0;
$main::opt_web = 0;
if ($1 eq "gv") {
$main::opt_gv = 1;
} elsif ($1 eq "evince") {
$main::opt_evince = 1;
} elsif ($1 eq "web") {
$main::opt_web = 1;
}
my $focus;
my $ignore;
($focus, $ignore) = ParseInteractiveArgs($2);
# Process current profile to account for various settings
my $profile = ProcessProfile($total, $orig_profile, $symbols,
$focus, $ignore);
my $reduced = ReduceProfile($symbols, $profile);
# Get derived profiles
my $flat = FlatProfile($reduced);
my $cumulative = CumulativeProfile($reduced);
if (PrintDot($main::prog, $symbols, $profile, $flat, $cumulative, $total)) {
if ($main::opt_gv) {
RunGV(TempName($main::next_tmpfile, "ps"), " &");
} elsif ($main::opt_evince) {
RunEvince(TempName($main::next_tmpfile, "pdf"), " &");
} elsif ($main::opt_web) {
RunWeb(TempName($main::next_tmpfile, "svg"));
}
$main::next_tmpfile++;
}
return 1;
}
if (m/^\s*$/) {
return 1;
}
print STDERR "Unknown command: try 'help'.\n";
return 1;
}
sub ProcessProfile {
my $total_count = shift;
my $orig_profile = shift;
my $symbols = shift;
my $focus = shift;
my $ignore = shift;
# Process current profile to account for various settings
my $profile = $orig_profile;
printf("Total: %s %s\n", Unparse($total_count), Units());
if ($focus ne '') {
$profile = FocusProfile($symbols, $profile, $focus);
my $focus_count = TotalProfile($profile);
printf("After focusing on '%s': %s %s of %s (%0.1f%%)\n",
$focus,
Unparse($focus_count), Units(),
Unparse($total_count), ($focus_count*100.0) / $total_count);
}
if ($ignore ne '') {
$profile = IgnoreProfile($symbols, $profile, $ignore);
my $ignore_count = TotalProfile($profile);
printf("After ignoring '%s': %s %s of %s (%0.1f%%)\n",
$ignore,
Unparse($ignore_count), Units(),
Unparse($total_count),
($ignore_count*100.0) / $total_count);
}
return $profile;
}
sub InteractiveHelpMessage {
print STDERR <<ENDOFHELP;
Interactive jeprof mode
Commands:
gv
gv [focus] [-ignore1] [-ignore2]
Show graphical hierarchical display of current profile. Without
any arguments, shows all samples in the profile. With the optional
"focus" argument, restricts the samples shown to just those where
the "focus" regular expression matches a routine name on the stack
trace.
web
web [focus] [-ignore1] [-ignore2]
Like GV, but displays profile in your web browser instead of using
Ghostview. Works best if your web browser is already running.
To change the browser that gets used:
On Linux, set the /etc/alternatives/gnome-www-browser symlink.
On OS X, change the Finder association for SVG files.
list [routine_regexp] [-ignore1] [-ignore2]
Show source listing of routines whose names match "routine_regexp"
weblist [routine_regexp] [-ignore1] [-ignore2]
Displays a source listing of routines whose names match "routine_regexp"
in a web browser. You can click on source lines to view the
corresponding disassembly.
top [--cum] [-ignore1] [-ignore2]
top20 [--cum] [-ignore1] [-ignore2]
top37 [--cum] [-ignore1] [-ignore2]
Show top lines ordered by flat profile count, or cumulative count
if --cum is specified. If a number is present after 'top', the
top K routines will be shown (defaults to showing the top 10)
disasm [routine_regexp] [-ignore1] [-ignore2]
Show disassembly of routines whose names match "routine_regexp",
annotated with sample counts.
callgrind
callgrind [filename]
Generates callgrind file. If no filename is given, kcachegrind is called.
help - This listing
quit or ^D - End jeprof
For commands that accept optional -ignore tags, samples where any routine in
the stack trace matches the regular expression in any of the -ignore
parameters will be ignored.
Further pprof details are available at this location (or one similar):
/usr/doc/gperftools-$PPROF_VERSION/cpu_profiler.html
/usr/doc/gperftools-$PPROF_VERSION/heap_profiler.html
ENDOFHELP
}
sub ParseInteractiveArgs {
my $args = shift;
my $focus = "";
my $ignore = "";
my @x = split(/ +/, $args);
foreach $a (@x) {
if ($a =~ m/^(--|-)lines$/) {
$main::opt_lines = 1;
} elsif ($a =~ m/^(--|-)cum$/) {
$main::opt_cum = 1;
} elsif ($a =~ m/^-(.*)/) {
$ignore .= (($ignore ne "") ? "|" : "" ) . $1;
} else {
$focus .= (($focus ne "") ? "|" : "" ) . $a;
}
}
if ($ignore ne "") {
print STDERR "Ignoring samples in call stacks that match '$ignore'\n";
}
return ($focus, $ignore);
}
##### Output code #####
sub TempName {
my $fnum = shift;
my $ext = shift;
my $file = "$main::tmpfile_ps.$fnum.$ext";
$main::tempnames{$file} = 1;
return $file;
}
# Print profile data in packed binary format (64-bit) to standard out
sub PrintProfileData {
my $profile = shift;
# print header (64-bit style)
# (zero) (header-size) (version) (sample-period) (zero)
print pack('L*', 0, 0, 3, 0, 0, 0, 1, 0, 0, 0);
foreach my $k (keys(%{$profile})) {
my $count = $profile->{$k};
my @addrs = split(/\n/, $k);
if ($#addrs >= 0) {
my $depth = $#addrs + 1;
# int(foo / 2**32) is the only reliable way to get rid of bottom
# 32 bits on both 32- and 64-bit systems.
print pack('L*', $count & 0xFFFFFFFF, int($count / 2**32));
print pack('L*', $depth & 0xFFFFFFFF, int($depth / 2**32));
foreach my $full_addr (@addrs) {
my $addr = $full_addr;
$addr =~ s/0x0*//; # strip off leading 0x, zeroes
if (length($addr) > 16) {
print STDERR "Invalid address in profile: $full_addr\n";
next;
}
my $low_addr = substr($addr, -8); # get last 8 hex chars
my $high_addr = substr($addr, -16, 8); # get up to 8 more hex chars
print pack('L*', hex('0x' . $low_addr), hex('0x' . $high_addr));
}
}
}
}
# Print symbols and profile data
sub PrintSymbolizedProfile {
my $symbols = shift;
my $profile = shift;
my $prog = shift;
$SYMBOL_PAGE =~ m,[^/]+$,; # matches everything after the last slash
my $symbol_marker = $&;
print '--- ', $symbol_marker, "\n";
if (defined($prog)) {
print 'binary=', $prog, "\n";
}
while (my ($pc, $name) = each(%{$symbols})) {
my $sep = ' ';
print '0x', $pc;
# We have a list of function names, which include the inlined
# calls. They are separated (and terminated) by --, which is
# illegal in function names.
for (my $j = 2; $j <= $#{$name}; $j += 3) {
print $sep, $name->[$j];
$sep = '--';
}
print "\n";
}
print '---', "\n";
my $profile_marker;
if ($main::profile_type eq 'heap') {
$HEAP_PAGE =~ m,[^/]+$,; # matches everything after the last slash
$profile_marker = $&;
} elsif ($main::profile_type eq 'growth') {
$GROWTH_PAGE =~ m,[^/]+$,; # matches everything after the last slash
$profile_marker = $&;
} elsif ($main::profile_type eq 'contention') {
$CONTENTION_PAGE =~ m,[^/]+$,; # matches everything after the last slash
$profile_marker = $&;
} else { # elsif ($main::profile_type eq 'cpu')
$PROFILE_PAGE =~ m,[^/]+$,; # matches everything after the last slash
$profile_marker = $&;
}
print '--- ', $profile_marker, "\n";
if (defined($main::collected_profile)) {
# if used with remote fetch, simply dump the collected profile to output.
open(SRC, "<$main::collected_profile");
while (<SRC>) {
print $_;
}
close(SRC);
} else {
# --raw/http: For everything to work correctly for non-remote profiles, we
# would need to extend PrintProfileData() to handle all possible profile
# types, re-enable the code that is currently disabled in ReadCPUProfile()
# and FixCallerAddresses(), and remove the remote profile dumping code in
# the block above.
die "--raw/http: jeprof can only dump remote profiles for --raw\n";
# dump a cpu-format profile to standard out
PrintProfileData($profile);
}
}
# Print text output
sub PrintText {
my $symbols = shift;
my $flat = shift;
my $cumulative = shift;
my $line_limit = shift;
my $total = TotalProfile($flat);
# Which profile to sort by?
my $s = $main::opt_cum ? $cumulative : $flat;
my $running_sum = 0;
my $lines = 0;
foreach my $k (sort { GetEntry($s, $b) <=> GetEntry($s, $a) || $a cmp $b }
keys(%{$cumulative})) {
my $f = GetEntry($flat, $k);
my $c = GetEntry($cumulative, $k);
$running_sum += $f;
my $sym = $k;
if (exists($symbols->{$k})) {
$sym = $symbols->{$k}->[0] . " " . $symbols->{$k}->[1];
if ($main::opt_addresses) {
$sym = $k . " " . $sym;
}
}
if ($f != 0 || $c != 0) {
printf("%8s %6s %6s %8s %6s %s\n",
Unparse($f),
Percent($f, $total),
Percent($running_sum, $total),
Unparse($c),
Percent($c, $total),
$sym);
}
$lines++;
last if ($line_limit >= 0 && $lines >= $line_limit);
}
}
# Callgrind format has a compression for repeated function and file
# names. You show the name the first time, and just use its number
# subsequently. This can cut down the file to about a third or a
# quarter of its uncompressed size. $key and $val are the key/value
# pair that would normally be printed by callgrind; $map is a map from
# value to number.
sub CompressedCGName {
my($key, $val, $map) = @_;
my $idx = $map->{$val};
# For very short keys, providing an index hurts rather than helps.
if (length($val) <= 3) {
return "$key=$val\n";
} elsif (defined($idx)) {
return "$key=($idx)\n";
} else {
# scalar(keys $map) gives the number of items in the map.
$idx = scalar(keys(%{$map})) + 1;
$map->{$val} = $idx;
return "$key=($idx) $val\n";
}
}
# Print the call graph in a way that's suiteable for callgrind.
sub PrintCallgrind {
my $calls = shift;
my $filename;
my %filename_to_index_map;
my %fnname_to_index_map;
if ($main::opt_interactive) {
$filename = shift;
print STDERR "Writing callgrind file to '$filename'.\n"
} else {
$filename = "&STDOUT";
}
open(CG, ">$filename");
printf CG ("events: Hits\n\n");
foreach my $call ( map { $_->[0] }
sort { $a->[1] cmp $b ->[1] ||
$a->[2] <=> $b->[2] }
map { /([^:]+):(\d+):([^ ]+)( -> ([^:]+):(\d+):(.+))?/;
[$_, $1, $2] }
keys %$calls ) {
my $count = int($calls->{$call});
$call =~ /([^:]+):(\d+):([^ ]+)( -> ([^:]+):(\d+):(.+))?/;
my ( $caller_file, $caller_line, $caller_function,
$callee_file, $callee_line, $callee_function ) =
( $1, $2, $3, $5, $6, $7 );
# TODO(csilvers): for better compression, collect all the
# caller/callee_files and functions first, before printing
# anything, and only compress those referenced more than once.
printf CG CompressedCGName("fl", $caller_file, \%filename_to_index_map);
printf CG CompressedCGName("fn", $caller_function, \%fnname_to_index_map);
if (defined $6) {
printf CG CompressedCGName("cfl", $callee_file, \%filename_to_index_map);
printf CG CompressedCGName("cfn", $callee_function, \%fnname_to_index_map);
printf CG ("calls=$count $callee_line\n");
}
printf CG ("$caller_line $count\n\n");
}
}
# Print disassembly for all all routines that match $main::opt_disasm
sub PrintDisassembly {
my $libs = shift;
my $flat = shift;
my $cumulative = shift;
my $disasm_opts = shift;
my $total = TotalProfile($flat);
foreach my $lib (@{$libs}) {
my $symbol_table = GetProcedureBoundaries($lib->[0], $disasm_opts);
my $offset = AddressSub($lib->[1], $lib->[3]);
foreach my $routine (sort ByName keys(%{$symbol_table})) {
my $start_addr = $symbol_table->{$routine}->[0];
my $end_addr = $symbol_table->{$routine}->[1];
# See if there are any samples in this routine
my $length = hex(AddressSub($end_addr, $start_addr));
my $addr = AddressAdd($start_addr, $offset);
for (my $i = 0; $i < $length; $i++) {
if (defined($cumulative->{$addr})) {
PrintDisassembledFunction($lib->[0], $offset,
$routine, $flat, $cumulative,
$start_addr, $end_addr, $total);
last;
}
$addr = AddressInc($addr);
}
}
}
}
# Return reference to array of tuples of the form:
# [start_address, filename, linenumber, instruction, limit_address]
# E.g.,
# ["0x806c43d", "/foo/bar.cc", 131, "ret", "0x806c440"]
sub Disassemble {
my $prog = shift;
my $offset = shift;
my $start_addr = shift;
my $end_addr = shift;
my $objdump = $obj_tool_map{"objdump"};
my $cmd = ShellEscape($objdump, "-C", "-d", "-l", "--no-show-raw-insn",
"--start-address=0x$start_addr",
"--stop-address=0x$end_addr", $prog);
open(OBJDUMP, "$cmd |") || error("$cmd: $!\n");
my @result = ();
my $filename = "";
my $linenumber = -1;
my $last = ["", "", "", ""];
while (<OBJDUMP>) {
s/\r//g; # turn windows-looking lines into unix-looking lines
chop;
if (m|\s*([^:\s]+):(\d+)\s*$|) {
# Location line of the form:
# <filename>:<linenumber>
$filename = $1;
$linenumber = $2;
} elsif (m/^ +([0-9a-f]+):\s*(.*)/) {
# Disassembly line -- zero-extend address to full length
my $addr = HexExtend($1);
my $k = AddressAdd($addr, $offset);
$last->[4] = $k; # Store ending address for previous instruction
$last = [$k, $filename, $linenumber, $2, $end_addr];
push(@result, $last);
}
}
close(OBJDUMP);
return @result;
}
# The input file should contain lines of the form /proc/maps-like
# output (same format as expected from the profiles) or that looks
# like hex addresses (like "0xDEADBEEF"). We will parse all
# /proc/maps output, and for all the hex addresses, we will output
# "short" symbol names, one per line, in the same order as the input.
sub PrintSymbols {
my $maps_and_symbols_file = shift;
# ParseLibraries expects pcs to be in a set. Fine by us...
my @pclist = (); # pcs in sorted order
my $pcs = {};
my $map = "";
foreach my $line (<$maps_and_symbols_file>) {
$line =~ s/\r//g; # turn windows-looking lines into unix-looking lines
if ($line =~ /\b(0x[0-9a-f]+)\b/i) {
push(@pclist, HexExtend($1));
$pcs->{$pclist[-1]} = 1;
} else {
$map .= $line;
}
}
my $libs = ParseLibraries($main::prog, $map, $pcs);
my $symbols = ExtractSymbols($libs, $pcs);
foreach my $pc (@pclist) {
# ->[0] is the shortname, ->[2] is the full name
print(($symbols->{$pc}->[0] || "??") . "\n");
}
}
# For sorting functions by name
sub ByName {
return ShortFunctionName($a) cmp ShortFunctionName($b);
}
# Print source-listing for all all routines that match $list_opts
sub PrintListing {
my $total = shift;
my $libs = shift;
my $flat = shift;
my $cumulative = shift;
my $list_opts = shift;
my $html = shift;
my $output = \*STDOUT;
my $fname = "";
if ($html) {
# Arrange to write the output to a temporary file
$fname = TempName($main::next_tmpfile, "html");
$main::next_tmpfile++;
if (!open(TEMP, ">$fname")) {
print STDERR "$fname: $!\n";
return;
}
$output = \*TEMP;
print $output HtmlListingHeader();
printf $output ("<div class=\"legend\">%s<br>Total: %s %s</div>\n",
$main::prog, Unparse($total), Units());
}
my $listed = 0;
foreach my $lib (@{$libs}) {
my $symbol_table = GetProcedureBoundaries($lib->[0], $list_opts);
my $offset = AddressSub($lib->[1], $lib->[3]);
foreach my $routine (sort ByName keys(%{$symbol_table})) {
# Print if there are any samples in this routine
my $start_addr = $symbol_table->{$routine}->[0];
my $end_addr = $symbol_table->{$routine}->[1];
my $length = hex(AddressSub($end_addr, $start_addr));
my $addr = AddressAdd($start_addr, $offset);
for (my $i = 0; $i < $length; $i++) {
if (defined($cumulative->{$addr})) {
$listed += PrintSource(
$lib->[0], $offset,
$routine, $flat, $cumulative,
$start_addr, $end_addr,
$html,
$output);
last;
}
$addr = AddressInc($addr);
}
}
}
if ($html) {
if ($listed > 0) {
print $output HtmlListingFooter();
close($output);
RunWeb($fname);
} else {
close($output);
unlink($fname);
}
}
}
sub HtmlListingHeader {
return <<'EOF';
<DOCTYPE html>
<html>
<head>
<title>Pprof listing</title>
<style type="text/css">
body {
font-family: sans-serif;
}
h1 {
font-size: 1.5em;
margin-bottom: 4px;
}
.legend {
font-size: 1.25em;
}
.line {
color: #aaaaaa;
}
.nop {
color: #aaaaaa;
}
.unimportant {
color: #cccccc;
}
.disasmloc {
color: #000000;
}
.deadsrc {
cursor: pointer;
}
.deadsrc:hover {
background-color: #eeeeee;
}
.livesrc {
color: #0000ff;
cursor: pointer;
}
.livesrc:hover {
background-color: #eeeeee;
}
.asm {
color: #008800;
display: none;
}
</style>
<script type="text/javascript">
function jeprof_toggle_asm(e) {
var target;
if (!e) e = window.event;
if (e.target) target = e.target;
else if (e.srcElement) target = e.srcElement;
if (target) {
var asm = target.nextSibling;
if (asm && asm.className == "asm") {
asm.style.display = (asm.style.display == "block" ? "" : "block");
e.preventDefault();
return false;
}
}
}
</script>
</head>
<body>
EOF
}
sub HtmlListingFooter {
return <<'EOF';
</body>
</html>
EOF
}
sub HtmlEscape {
my $text = shift;
$text =~ s/&/&amp;/g;
$text =~ s/</&lt;/g;
$text =~ s/>/&gt;/g;
return $text;
}
# Returns the indentation of the line, if it has any non-whitespace
# characters. Otherwise, returns -1.
sub Indentation {
my $line = shift;
if (m/^(\s*)\S/) {
return length($1);
} else {
return -1;
}
}
# If the symbol table contains inlining info, Disassemble() may tag an
# instruction with a location inside an inlined function. But for
# source listings, we prefer to use the location in the function we
# are listing. So use MapToSymbols() to fetch full location
# information for each instruction and then pick out the first
# location from a location list (location list contains callers before
# callees in case of inlining).
#
# After this routine has run, each entry in $instructions contains:
# [0] start address
# [1] filename for function we are listing
# [2] line number for function we are listing
# [3] disassembly
# [4] limit address
# [5] most specific filename (may be different from [1] due to inlining)
# [6] most specific line number (may be different from [2] due to inlining)
sub GetTopLevelLineNumbers {
my ($lib, $offset, $instructions) = @_;
my $pcs = [];
for (my $i = 0; $i <= $#{$instructions}; $i++) {
push(@{$pcs}, $instructions->[$i]->[0]);
}
my $symbols = {};
MapToSymbols($lib, $offset, $pcs, $symbols);
for (my $i = 0; $i <= $#{$instructions}; $i++) {
my $e = $instructions->[$i];
push(@{$e}, $e->[1]);
push(@{$e}, $e->[2]);
my $addr = $e->[0];
my $sym = $symbols->{$addr};
if (defined($sym)) {
if ($#{$sym} >= 2 && $sym->[1] =~ m/^(.*):(\d+)$/) {
$e->[1] = $1; # File name
$e->[2] = $2; # Line number
}
}
}
}
# Print source-listing for one routine
sub PrintSource {
my $prog = shift;
my $offset = shift;
my $routine = shift;
my $flat = shift;
my $cumulative = shift;
my $start_addr = shift;
my $end_addr = shift;
my $html = shift;
my $output = shift;
# Disassemble all instructions (just to get line numbers)
my @instructions = Disassemble($prog, $offset, $start_addr, $end_addr);
GetTopLevelLineNumbers($prog, $offset, \@instructions);
# Hack 1: assume that the first source file encountered in the
# disassembly contains the routine
my $filename = undef;
for (my $i = 0; $i <= $#instructions; $i++) {
if ($instructions[$i]->[2] >= 0) {
$filename = $instructions[$i]->[1];
last;
}
}
if (!defined($filename)) {
print STDERR "no filename found in $routine\n";
return 0;
}
# Hack 2: assume that the largest line number from $filename is the
# end of the procedure. This is typically safe since if P1 contains
# an inlined call to P2, then P2 usually occurs earlier in the
# source file. If this does not work, we might have to compute a
# density profile or just print all regions we find.
my $lastline = 0;
for (my $i = 0; $i <= $#instructions; $i++) {
my $f = $instructions[$i]->[1];
my $l = $instructions[$i]->[2];
if (($f eq $filename) && ($l > $lastline)) {
$lastline = $l;
}
}
# Hack 3: assume the first source location from "filename" is the start of
# the source code.
my $firstline = 1;
for (my $i = 0; $i <= $#instructions; $i++) {
if ($instructions[$i]->[1] eq $filename) {
$firstline = $instructions[$i]->[2];
last;
}
}
# Hack 4: Extend last line forward until its indentation is less than
# the indentation we saw on $firstline
my $oldlastline = $lastline;
{
if (!open(FILE, "<$filename")) {
print STDERR "$filename: $!\n";
return 0;
}
my $l = 0;
my $first_indentation = -1;
while (<FILE>) {
s/\r//g; # turn windows-looking lines into unix-looking lines
$l++;
my $indent = Indentation($_);
if ($l >= $firstline) {
if ($first_indentation < 0 && $indent >= 0) {
$first_indentation = $indent;
last if ($first_indentation == 0);
}
}
if ($l >= $lastline && $indent >= 0) {
if ($indent >= $first_indentation) {
$lastline = $l+1;
} else {
last;
}
}
}
close(FILE);
}
# Assign all samples to the range $firstline,$lastline,
# Hack 4: If an instruction does not occur in the range, its samples
# are moved to the next instruction that occurs in the range.
my $samples1 = {}; # Map from line number to flat count
my $samples2 = {}; # Map from line number to cumulative count
my $running1 = 0; # Unassigned flat counts
my $running2 = 0; # Unassigned cumulative counts
my $total1 = 0; # Total flat counts
my $total2 = 0; # Total cumulative counts
my %disasm = (); # Map from line number to disassembly
my $running_disasm = ""; # Unassigned disassembly
my $skip_marker = "---\n";
if ($html) {
$skip_marker = "";
for (my $l = $firstline; $l <= $lastline; $l++) {
$disasm{$l} = "";
}
}
my $last_dis_filename = '';
my $last_dis_linenum = -1;
my $last_touched_line = -1; # To detect gaps in disassembly for a line
foreach my $e (@instructions) {
# Add up counts for all address that fall inside this instruction
my $c1 = 0;
my $c2 = 0;
for (my $a = $e->[0]; $a lt $e->[4]; $a = AddressInc($a)) {
$c1 += GetEntry($flat, $a);
$c2 += GetEntry($cumulative, $a);
}
if ($html) {
my $dis = sprintf(" %6s %6s \t\t%8s: %s ",
HtmlPrintNumber($c1),
HtmlPrintNumber($c2),
UnparseAddress($offset, $e->[0]),
CleanDisassembly($e->[3]));
# Append the most specific source line associated with this instruction
if (length($dis) < 80) { $dis .= (' ' x (80 - length($dis))) };
$dis = HtmlEscape($dis);
my $f = $e->[5];
my $l = $e->[6];
if ($f ne $last_dis_filename) {
$dis .= sprintf("<span class=disasmloc>%s:%d</span>",
HtmlEscape(CleanFileName($f)), $l);
} elsif ($l ne $last_dis_linenum) {
# De-emphasize the unchanged file name portion
$dis .= sprintf("<span class=unimportant>%s</span>" .
"<span class=disasmloc>:%d</span>",
HtmlEscape(CleanFileName($f)), $l);
} else {
# De-emphasize the entire location
$dis .= sprintf("<span class=unimportant>%s:%d</span>",
HtmlEscape(CleanFileName($f)), $l);
}
$last_dis_filename = $f;
$last_dis_linenum = $l;
$running_disasm .= $dis;
$running_disasm .= "\n";
}
$running1 += $c1;
$running2 += $c2;
$total1 += $c1;
$total2 += $c2;
my $file = $e->[1];
my $line = $e->[2];
if (($file eq $filename) &&
($line >= $firstline) &&
($line <= $lastline)) {
# Assign all accumulated samples to this line
AddEntry($samples1, $line, $running1);
AddEntry($samples2, $line, $running2);
$running1 = 0;
$running2 = 0;
if ($html) {
if ($line != $last_touched_line && $disasm{$line} ne '') {
$disasm{$line} .= "\n";
}
$disasm{$line} .= $running_disasm;
$running_disasm = '';
$last_touched_line = $line;
}
}
}
# Assign any leftover samples to $lastline
AddEntry($samples1, $lastline, $running1);
AddEntry($samples2, $lastline, $running2);
if ($html) {
if ($lastline != $last_touched_line && $disasm{$lastline} ne '') {
$disasm{$lastline} .= "\n";
}
$disasm{$lastline} .= $running_disasm;
}
if ($html) {
printf $output (
"<h1>%s</h1>%s\n<pre onClick=\"jeprof_toggle_asm()\">\n" .
"Total:%6s %6s (flat / cumulative %s)\n",
HtmlEscape(ShortFunctionName($routine)),
HtmlEscape(CleanFileName($filename)),
Unparse($total1),
Unparse($total2),
Units());
} else {
printf $output (
"ROUTINE ====================== %s in %s\n" .
"%6s %6s Total %s (flat / cumulative)\n",
ShortFunctionName($routine),
CleanFileName($filename),
Unparse($total1),
Unparse($total2),
Units());
}
if (!open(FILE, "<$filename")) {
print STDERR "$filename: $!\n";
return 0;
}
my $l = 0;
while (<FILE>) {
s/\r//g; # turn windows-looking lines into unix-looking lines
$l++;
if ($l >= $firstline - 5 &&
(($l <= $oldlastline + 5) || ($l <= $lastline))) {
chop;
my $text = $_;
if ($l == $firstline) { print $output $skip_marker; }
my $n1 = GetEntry($samples1, $l);
my $n2 = GetEntry($samples2, $l);
if ($html) {
# Emit a span that has one of the following classes:
# livesrc -- has samples
# deadsrc -- has disassembly, but with no samples
# nop -- has no matching disasembly
# Also emit an optional span containing disassembly.
my $dis = $disasm{$l};
my $asm = "";
if (defined($dis) && $dis ne '') {
$asm = "<span class=\"asm\">" . $dis . "</span>";
}
my $source_class = (($n1 + $n2 > 0)
? "livesrc"
: (($asm ne "") ? "deadsrc" : "nop"));
printf $output (
"<span class=\"line\">%5d</span> " .
"<span class=\"%s\">%6s %6s %s</span>%s\n",
$l, $source_class,
HtmlPrintNumber($n1),
HtmlPrintNumber($n2),
HtmlEscape($text),
$asm);
} else {
printf $output(
"%6s %6s %4d: %s\n",
UnparseAlt($n1),
UnparseAlt($n2),
$l,
$text);
}
if ($l == $lastline) { print $output $skip_marker; }
};
}
close(FILE);
if ($html) {
print $output "</pre>\n";
}
return 1;
}
# Return the source line for the specified file/linenumber.
# Returns undef if not found.
sub SourceLine {
my $file = shift;
my $line = shift;
# Look in cache
if (!defined($main::source_cache{$file})) {
if (100 < scalar keys(%main::source_cache)) {
# Clear the cache when it gets too big
$main::source_cache = ();
}
# Read all lines from the file
if (!open(FILE, "<$file")) {
print STDERR "$file: $!\n";
$main::source_cache{$file} = []; # Cache the negative result
return undef;
}
my $lines = [];
push(@{$lines}, ""); # So we can use 1-based line numbers as indices
while (<FILE>) {
push(@{$lines}, $_);
}
close(FILE);
# Save the lines in the cache
$main::source_cache{$file} = $lines;
}
my $lines = $main::source_cache{$file};
if (($line < 0) || ($line > $#{$lines})) {
return undef;
} else {
return $lines->[$line];
}
}
# Print disassembly for one routine with interspersed source if available
sub PrintDisassembledFunction {
my $prog = shift;
my $offset = shift;
my $routine = shift;
my $flat = shift;
my $cumulative = shift;
my $start_addr = shift;
my $end_addr = shift;
my $total = shift;
# Disassemble all instructions
my @instructions = Disassemble($prog, $offset, $start_addr, $end_addr);
# Make array of counts per instruction
my @flat_count = ();
my @cum_count = ();
my $flat_total = 0;
my $cum_total = 0;
foreach my $e (@instructions) {
# Add up counts for all address that fall inside this instruction
my $c1 = 0;
my $c2 = 0;
for (my $a = $e->[0]; $a lt $e->[4]; $a = AddressInc($a)) {
$c1 += GetEntry($flat, $a);
$c2 += GetEntry($cumulative, $a);
}
push(@flat_count, $c1);
push(@cum_count, $c2);
$flat_total += $c1;
$cum_total += $c2;
}
# Print header with total counts
printf("ROUTINE ====================== %s\n" .
"%6s %6s %s (flat, cumulative) %.1f%% of total\n",
ShortFunctionName($routine),
Unparse($flat_total),
Unparse($cum_total),
Units(),
($cum_total * 100.0) / $total);
# Process instructions in order
my $current_file = "";
for (my $i = 0; $i <= $#instructions; ) {
my $e = $instructions[$i];
# Print the new file name whenever we switch files
if ($e->[1] ne $current_file) {
$current_file = $e->[1];
my $fname = $current_file;
$fname =~ s|^\./||; # Trim leading "./"
# Shorten long file names
if (length($fname) >= 58) {
$fname = "..." . substr($fname, -55);
}
printf("-------------------- %s\n", $fname);
}
# TODO: Compute range of lines to print together to deal with
# small reorderings.
my $first_line = $e->[2];
my $last_line = $first_line;
my %flat_sum = ();
my %cum_sum = ();
for (my $l = $first_line; $l <= $last_line; $l++) {
$flat_sum{$l} = 0;
$cum_sum{$l} = 0;
}
# Find run of instructions for this range of source lines
my $first_inst = $i;
while (($i <= $#instructions) &&
($instructions[$i]->[2] >= $first_line) &&
($instructions[$i]->[2] <= $last_line)) {
$e = $instructions[$i];
$flat_sum{$e->[2]} += $flat_count[$i];
$cum_sum{$e->[2]} += $cum_count[$i];
$i++;
}
my $last_inst = $i - 1;
# Print source lines
for (my $l = $first_line; $l <= $last_line; $l++) {
my $line = SourceLine($current_file, $l);
if (!defined($line)) {
$line = "?\n";
next;
} else {
$line =~ s/^\s+//;
}
printf("%6s %6s %5d: %s",
UnparseAlt($flat_sum{$l}),
UnparseAlt($cum_sum{$l}),
$l,
$line);
}
# Print disassembly
for (my $x = $first_inst; $x <= $last_inst; $x++) {
my $e = $instructions[$x];
printf("%6s %6s %8s: %6s\n",
UnparseAlt($flat_count[$x]),
UnparseAlt($cum_count[$x]),
UnparseAddress($offset, $e->[0]),
CleanDisassembly($e->[3]));
}
}
}
# Print DOT graph
sub PrintDot {
my $prog = shift;
my $symbols = shift;
my $raw = shift;
my $flat = shift;
my $cumulative = shift;
my $overall_total = shift;
# Get total
my $local_total = TotalProfile($flat);
my $nodelimit = int($main::opt_nodefraction * $local_total);
my $edgelimit = int($main::opt_edgefraction * $local_total);
my $nodecount = $main::opt_nodecount;
# Find nodes to include
my @list = (sort { abs(GetEntry($cumulative, $b)) <=>
abs(GetEntry($cumulative, $a))
|| $a cmp $b }
keys(%{$cumulative}));
my $last = $nodecount - 1;
if ($last > $#list) {
$last = $#list;
}
while (($last >= 0) &&
(abs(GetEntry($cumulative, $list[$last])) <= $nodelimit)) {
$last--;
}
if ($last < 0) {
print STDERR "No nodes to print\n";
return 0;
}
if ($nodelimit > 0 || $edgelimit > 0) {
printf STDERR ("Dropping nodes with <= %s %s; edges with <= %s abs(%s)\n",
Unparse($nodelimit), Units(),
Unparse($edgelimit), Units());
}
# Open DOT output file
my $output;
my $escaped_dot = ShellEscape(@DOT);
my $escaped_ps2pdf = ShellEscape(@PS2PDF);
if ($main::opt_gv) {
my $escaped_outfile = ShellEscape(TempName($main::next_tmpfile, "ps"));
$output = "| $escaped_dot -Tps2 >$escaped_outfile";
} elsif ($main::opt_evince) {
my $escaped_outfile = ShellEscape(TempName($main::next_tmpfile, "pdf"));
$output = "| $escaped_dot -Tps2 | $escaped_ps2pdf - $escaped_outfile";
} elsif ($main::opt_ps) {
$output = "| $escaped_dot -Tps2";
} elsif ($main::opt_pdf) {
$output = "| $escaped_dot -Tps2 | $escaped_ps2pdf - -";
} elsif ($main::opt_web || $main::opt_svg) {
# We need to post-process the SVG, so write to a temporary file always.
my $escaped_outfile = ShellEscape(TempName($main::next_tmpfile, "svg"));
$output = "| $escaped_dot -Tsvg >$escaped_outfile";
} elsif ($main::opt_gif) {
$output = "| $escaped_dot -Tgif";
} else {
$output = ">&STDOUT";
}
open(DOT, $output) || error("$output: $!\n");
# Title
printf DOT ("digraph \"%s; %s %s\" {\n",
$prog,
Unparse($overall_total),
Units());
if ($main::opt_pdf) {
# The output is more printable if we set the page size for dot.
printf DOT ("size=\"8,11\"\n");
}
printf DOT ("node [width=0.375,height=0.25];\n");
# Print legend
printf DOT ("Legend [shape=box,fontsize=24,shape=plaintext," .
"label=\"%s\\l%s\\l%s\\l%s\\l%s\\l\"];\n",
$prog,
sprintf("Total %s: %s", Units(), Unparse($overall_total)),
sprintf("Focusing on: %s", Unparse($local_total)),
sprintf("Dropped nodes with <= %s abs(%s)",
Unparse($nodelimit), Units()),
sprintf("Dropped edges with <= %s %s",
Unparse($edgelimit), Units())
);
# Print nodes
my %node = ();
my $nextnode = 1;
foreach my $a (@list[0..$last]) {
# Pick font size
my $f = GetEntry($flat, $a);
my $c = GetEntry($cumulative, $a);
my $fs = 8;
if ($local_total > 0) {
$fs = 8 + (50.0 * sqrt(abs($f * 1.0 / $local_total)));
}
$node{$a} = $nextnode++;
my $sym = $a;
$sym =~ s/\s+/\\n/g;
$sym =~ s/::/\\n/g;
# Extra cumulative info to print for non-leaves
my $extra = "";
if ($f != $c) {
$extra = sprintf("\\rof %s (%s)",
Unparse($c),
Percent($c, $local_total));
}
my $style = "";
if ($main::opt_heapcheck) {
if ($f > 0) {
# make leak-causing nodes more visible (add a background)
$style = ",style=filled,fillcolor=gray"
} elsif ($f < 0) {
# make anti-leak-causing nodes (which almost never occur)
# stand out as well (triple border)
$style = ",peripheries=3"
}
}
printf DOT ("N%d [label=\"%s\\n%s (%s)%s\\r" .
"\",shape=box,fontsize=%.1f%s];\n",
$node{$a},
$sym,
Unparse($f),
Percent($f, $local_total),
$extra,
$fs,
$style,
);
}
# Get edges and counts per edge
my %edge = ();
my $n;
my $fullname_to_shortname_map = {};
FillFullnameToShortnameMap($symbols, $fullname_to_shortname_map);
foreach my $k (keys(%{$raw})) {
# TODO: omit low %age edges
$n = $raw->{$k};
my @translated = TranslateStack($symbols, $fullname_to_shortname_map, $k);
for (my $i = 1; $i <= $#translated; $i++) {
my $src = $translated[$i];
my $dst = $translated[$i-1];
#next if ($src eq $dst); # Avoid self-edges?
if (exists($node{$src}) && exists($node{$dst})) {
my $edge_label = "$src\001$dst";
if (!exists($edge{$edge_label})) {
$edge{$edge_label} = 0;
}
$edge{$edge_label} += $n;
}
}
}
# Print edges (process in order of decreasing counts)
my %indegree = (); # Number of incoming edges added per node so far
my %outdegree = (); # Number of outgoing edges added per node so far
foreach my $e (sort { $edge{$b} <=> $edge{$a} } keys(%edge)) {
my @x = split(/\001/, $e);
$n = $edge{$e};
# Initialize degree of kept incoming and outgoing edges if necessary
my $src = $x[0];
my $dst = $x[1];
if (!exists($outdegree{$src})) { $outdegree{$src} = 0; }
if (!exists($indegree{$dst})) { $indegree{$dst} = 0; }
my $keep;
if ($indegree{$dst} == 0) {
# Keep edge if needed for reachability
$keep = 1;
} elsif (abs($n) <= $edgelimit) {
# Drop if we are below --edgefraction
$keep = 0;
} elsif ($outdegree{$src} >= $main::opt_maxdegree ||
$indegree{$dst} >= $main::opt_maxdegree) {
# Keep limited number of in/out edges per node
$keep = 0;
} else {
$keep = 1;
}
if ($keep) {
$outdegree{$src}++;
$indegree{$dst}++;
# Compute line width based on edge count
my $fraction = abs($local_total ? (3 * ($n / $local_total)) : 0);
if ($fraction > 1) { $fraction = 1; }
my $w = $fraction * 2;
if ($w < 1 && ($main::opt_web || $main::opt_svg)) {
# SVG output treats line widths < 1 poorly.
$w = 1;
}
# Dot sometimes segfaults if given edge weights that are too large, so
# we cap the weights at a large value
my $edgeweight = abs($n) ** 0.7;
if ($edgeweight > 100000) { $edgeweight = 100000; }
$edgeweight = int($edgeweight);
my $style = sprintf("setlinewidth(%f)", $w);
if ($x[1] =~ m/\(inline\)/) {
$style .= ",dashed";
}
# Use a slightly squashed function of the edge count as the weight
printf DOT ("N%s -> N%s [label=%s, weight=%d, style=\"%s\"];\n",
$node{$x[0]},
$node{$x[1]},
Unparse($n),
$edgeweight,
$style);
}
}
print DOT ("}\n");
close(DOT);
if ($main::opt_web || $main::opt_svg) {
# Rewrite SVG to be more usable inside web browser.
RewriteSvg(TempName($main::next_tmpfile, "svg"));
}
return 1;
}
sub RewriteSvg {
my $svgfile = shift;
open(SVG, $svgfile) || die "open temp svg: $!";
my @svg = <SVG>;
close(SVG);
unlink $svgfile;
my $svg = join('', @svg);
# Dot's SVG output is
#
# <svg width="___" height="___"
# viewBox="___" xmlns=...>
# <g id="graph0" transform="...">
# ...
# </g>
# </svg>
#
# Change it to
#
# <svg width="100%" height="100%"
# xmlns=...>
# $svg_javascript
# <g id="viewport" transform="translate(0,0)">
# <g id="graph0" transform="...">
# ...
# </g>
# </g>
# </svg>
# Fix width, height; drop viewBox.
$svg =~ s/(?s)<svg width="[^"]+" height="[^"]+"(.*?)viewBox="[^"]+"/<svg width="100%" height="100%"$1/;
# Insert script, viewport <g> above first <g>
my $svg_javascript = SvgJavascript();
my $viewport = "<g id=\"viewport\" transform=\"translate(0,0)\">\n";
$svg =~ s/<g id="graph\d"/$svg_javascript$viewport$&/;
# Insert final </g> above </svg>.
$svg =~ s/(.*)(<\/svg>)/$1<\/g>$2/;
$svg =~ s/<g id="graph\d"(.*?)/<g id="viewport"$1/;
if ($main::opt_svg) {
# --svg: write to standard output.
print $svg;
} else {
# Write back to temporary file.
open(SVG, ">$svgfile") || die "open $svgfile: $!";
print SVG $svg;
close(SVG);
}
}
sub SvgJavascript {
return <<'EOF';
<script type="text/ecmascript"><![CDATA[
// SVGPan
// http://www.cyberz.org/blog/2009/12/08/svgpan-a-javascript-svg-panzoomdrag-library/
// Local modification: if(true || ...) below to force panning, never moving.
/**
* SVGPan library 1.2
* ====================
*
* Given an unique existing element with id "viewport", including the
* the library into any SVG adds the following capabilities:
*
* - Mouse panning
* - Mouse zooming (using the wheel)
* - Object dargging
*
* Known issues:
*
* - Zooming (while panning) on Safari has still some issues
*
* Releases:
*
* 1.2, Sat Mar 20 08:42:50 GMT 2010, Zeng Xiaohui
* Fixed a bug with browser mouse handler interaction
*
* 1.1, Wed Feb 3 17:39:33 GMT 2010, Zeng Xiaohui
* Updated the zoom code to support the mouse wheel on Safari/Chrome
*
* 1.0, Andrea Leofreddi
* First release
*
* This code is licensed under the following BSD license:
*
* Copyright 2009-2010 Andrea Leofreddi <a.leofreddi@itcharm.com>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY Andrea Leofreddi ``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 Andrea Leofreddi OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of Andrea Leofreddi.
*/
var root = document.documentElement;
var state = 'none', stateTarget, stateOrigin, stateTf;
setupHandlers(root);
/**
* Register handlers
*/
function setupHandlers(root){
setAttributes(root, {
"onmouseup" : "add(evt)",
"onmousedown" : "handleMouseDown(evt)",
"onmousemove" : "handleMouseMove(evt)",
"onmouseup" : "handleMouseUp(evt)",
//"onmouseout" : "handleMouseUp(evt)", // Decomment this to stop the pan functionality when dragging out of the SVG element
});
if(navigator.userAgent.toLowerCase().indexOf('webkit') >= 0)
window.addEventListener('mousewheel', handleMouseWheel, false); // Chrome/Safari
else
window.addEventListener('DOMMouseScroll', handleMouseWheel, false); // Others
var g = svgDoc.getElementById("svg");
g.width = "100%";
g.height = "100%";
}
/**
* Instance an SVGPoint object with given event coordinates.
*/
function getEventPoint(evt) {
var p = root.createSVGPoint();
p.x = evt.clientX;
p.y = evt.clientY;
return p;
}
/**
* Sets the current transform matrix of an element.
*/
function setCTM(element, matrix) {
var s = "matrix(" + matrix.a + "," + matrix.b + "," + matrix.c + "," + matrix.d + "," + matrix.e + "," + matrix.f + ")";
element.setAttribute("transform", s);
}
/**
* Dumps a matrix to a string (useful for debug).
*/
function dumpMatrix(matrix) {
var s = "[ " + matrix.a + ", " + matrix.c + ", " + matrix.e + "\n " + matrix.b + ", " + matrix.d + ", " + matrix.f + "\n 0, 0, 1 ]";
return s;
}
/**
* Sets attributes of an element.
*/
function setAttributes(element, attributes){
for (i in attributes)
element.setAttributeNS(null, i, attributes[i]);
}
/**
* Handle mouse move event.
*/
function handleMouseWheel(evt) {
if(evt.preventDefault)
evt.preventDefault();
evt.returnValue = false;
var svgDoc = evt.target.ownerDocument;
var delta;
if(evt.wheelDelta)
delta = evt.wheelDelta / 3600; // Chrome/Safari
else
delta = evt.detail / -90; // Mozilla
var z = 1 + delta; // Zoom factor: 0.9/1.1
var g = svgDoc.getElementById("viewport");
var p = getEventPoint(evt);
p = p.matrixTransform(g.getCTM().inverse());
// Compute new scale matrix in current mouse position
var k = root.createSVGMatrix().translate(p.x, p.y).scale(z).translate(-p.x, -p.y);
setCTM(g, g.getCTM().multiply(k));
stateTf = stateTf.multiply(k.inverse());
}
/**
* Handle mouse move event.
*/
function handleMouseMove(evt) {
if(evt.preventDefault)
evt.preventDefault();
evt.returnValue = false;
var svgDoc = evt.target.ownerDocument;
var g = svgDoc.getElementById("viewport");
if(state == 'pan') {
// Pan mode
var p = getEventPoint(evt).matrixTransform(stateTf);
setCTM(g, stateTf.inverse().translate(p.x - stateOrigin.x, p.y - stateOrigin.y));
} else if(state == 'move') {
// Move mode
var p = getEventPoint(evt).matrixTransform(g.getCTM().inverse());
setCTM(stateTarget, root.createSVGMatrix().translate(p.x - stateOrigin.x, p.y - stateOrigin.y).multiply(g.getCTM().inverse()).multiply(stateTarget.getCTM()));
stateOrigin = p;
}
}
/**
* Handle click event.
*/
function handleMouseDown(evt) {
if(evt.preventDefault)
evt.preventDefault();
evt.returnValue = false;
var svgDoc = evt.target.ownerDocument;
var g = svgDoc.getElementById("viewport");
if(true || evt.target.tagName == "svg") {
// Pan mode
state = 'pan';
stateTf = g.getCTM().inverse();
stateOrigin = getEventPoint(evt).matrixTransform(stateTf);
} else {
// Move mode
state = 'move';
stateTarget = evt.target;
stateTf = g.getCTM().inverse();
stateOrigin = getEventPoint(evt).matrixTransform(stateTf);
}
}
/**
* Handle mouse button release event.
*/
function handleMouseUp(evt) {
if(evt.preventDefault)
evt.preventDefault();
evt.returnValue = false;
var svgDoc = evt.target.ownerDocument;
if(state == 'pan' || state == 'move') {
// Quit pan mode
state = '';
}
}
]]></script>
EOF
}
# Provides a map from fullname to shortname for cases where the
# shortname is ambiguous. The symlist has both the fullname and
# shortname for all symbols, which is usually fine, but sometimes --
# such as overloaded functions -- two different fullnames can map to
# the same shortname. In that case, we use the address of the
# function to disambiguate the two. This function fills in a map that
# maps fullnames to modified shortnames in such cases. If a fullname
# is not present in the map, the 'normal' shortname provided by the
# symlist is the appropriate one to use.
sub FillFullnameToShortnameMap {
my $symbols = shift;
my $fullname_to_shortname_map = shift;
my $shortnames_seen_once = {};
my $shortnames_seen_more_than_once = {};
foreach my $symlist (values(%{$symbols})) {
# TODO(csilvers): deal with inlined symbols too.
my $shortname = $symlist->[0];
my $fullname = $symlist->[2];
if ($fullname !~ /<[0-9a-fA-F]+>$/) { # fullname doesn't end in an address
next; # the only collisions we care about are when addresses differ
}
if (defined($shortnames_seen_once->{$shortname}) &&
$shortnames_seen_once->{$shortname} ne $fullname) {
$shortnames_seen_more_than_once->{$shortname} = 1;
} else {
$shortnames_seen_once->{$shortname} = $fullname;
}
}
foreach my $symlist (values(%{$symbols})) {
my $shortname = $symlist->[0];
my $fullname = $symlist->[2];
# TODO(csilvers): take in a list of addresses we care about, and only
# store in the map if $symlist->[1] is in that list. Saves space.
next if defined($fullname_to_shortname_map->{$fullname});
if (defined($shortnames_seen_more_than_once->{$shortname})) {
if ($fullname =~ /<0*([^>]*)>$/) { # fullname has address at end of it
$fullname_to_shortname_map->{$fullname} = "$shortname\@$1";
}
}
}
}
# Return a small number that identifies the argument.
# Multiple calls with the same argument will return the same number.
# Calls with different arguments will return different numbers.
sub ShortIdFor {
my $key = shift;
my $id = $main::uniqueid{$key};
if (!defined($id)) {
$id = keys(%main::uniqueid) + 1;
$main::uniqueid{$key} = $id;
}
return $id;
}
# Translate a stack of addresses into a stack of symbols
sub TranslateStack {
my $symbols = shift;
my $fullname_to_shortname_map = shift;
my $k = shift;
my @addrs = split(/\n/, $k);
my @result = ();
for (my $i = 0; $i <= $#addrs; $i++) {
my $a = $addrs[$i];
# Skip large addresses since they sometimes show up as fake entries on RH9
if (length($a) > 8 && $a gt "7fffffffffffffff") {
next;
}
if ($main::opt_disasm || $main::opt_list) {
# We want just the address for the key
push(@result, $a);
next;
}
my $symlist = $symbols->{$a};
if (!defined($symlist)) {
$symlist = [$a, "", $a];
}
# We can have a sequence of symbols for a particular entry
# (more than one symbol in the case of inlining). Callers
# come before callees in symlist, so walk backwards since
# the translated stack should contain callees before callers.
for (my $j = $#{$symlist}; $j >= 2; $j -= 3) {
my $func = $symlist->[$j-2];
my $fileline = $symlist->[$j-1];
my $fullfunc = $symlist->[$j];
if (defined($fullname_to_shortname_map->{$fullfunc})) {
$func = $fullname_to_shortname_map->{$fullfunc};
}
if ($j > 2) {
$func = "$func (inline)";
}
# Do not merge nodes corresponding to Callback::Run since that
# causes confusing cycles in dot display. Instead, we synthesize
# a unique name for this frame per caller.
if ($func =~ m/Callback.*::Run$/) {
my $caller = ($i > 0) ? $addrs[$i-1] : 0;
$func = "Run#" . ShortIdFor($caller);
}
if ($main::opt_addresses) {
push(@result, "$a $func $fileline");
} elsif ($main::opt_lines) {
if ($func eq '??' && $fileline eq '??:0') {
push(@result, "$a");
} else {
push(@result, "$func $fileline");
}
} elsif ($main::opt_functions) {
if ($func eq '??') {
push(@result, "$a");
} else {
push(@result, $func);
}
} elsif ($main::opt_files) {
if ($fileline eq '??:0' || $fileline eq '') {
push(@result, "$a");
} else {
my $f = $fileline;
$f =~ s/:\d+$//;
push(@result, $f);
}
} else {
push(@result, $a);
last; # Do not print inlined info
}
}
}
# print join(",", @addrs), " => ", join(",", @result), "\n";
return @result;
}
# Generate percent string for a number and a total
sub Percent {
my $num = shift;
my $tot = shift;
if ($tot != 0) {
return sprintf("%.1f%%", $num * 100.0 / $tot);
} else {
return ($num == 0) ? "nan" : (($num > 0) ? "+inf" : "-inf");
}
}
# Generate pretty-printed form of number
sub Unparse {
my $num = shift;
if ($main::profile_type eq 'heap' || $main::profile_type eq 'growth') {
if ($main::opt_inuse_objects || $main::opt_alloc_objects) {
return sprintf("%d", $num);
} else {
if ($main::opt_show_bytes) {
return sprintf("%d", $num);
} else {
return sprintf("%.1f", $num / 1048576.0);
}
}
} elsif ($main::profile_type eq 'contention' && !$main::opt_contentions) {
return sprintf("%.3f", $num / 1e9); # Convert nanoseconds to seconds
} else {
return sprintf("%d", $num);
}
}
# Alternate pretty-printed form: 0 maps to "."
sub UnparseAlt {
my $num = shift;
if ($num == 0) {
return ".";
} else {
return Unparse($num);
}
}
# Alternate pretty-printed form: 0 maps to ""
sub HtmlPrintNumber {
my $num = shift;
if ($num == 0) {
return "";
} else {
return Unparse($num);
}
}
# Return output units
sub Units {
if ($main::profile_type eq 'heap' || $main::profile_type eq 'growth') {
if ($main::opt_inuse_objects || $main::opt_alloc_objects) {
return "objects";
} else {
if ($main::opt_show_bytes) {
return "B";
} else {
return "MB";
}
}
} elsif ($main::profile_type eq 'contention' && !$main::opt_contentions) {
return "seconds";
} else {
return "samples";
}
}
##### Profile manipulation code #####
# Generate flattened profile:
# If count is charged to stack [a,b,c,d], in generated profile,
# it will be charged to [a]
sub FlatProfile {
my $profile = shift;
my $result = {};
foreach my $k (keys(%{$profile})) {
my $count = $profile->{$k};
my @addrs = split(/\n/, $k);
if ($#addrs >= 0) {
AddEntry($result, $addrs[0], $count);
}
}
return $result;
}
# Generate cumulative profile:
# If count is charged to stack [a,b,c,d], in generated profile,
# it will be charged to [a], [b], [c], [d]
sub CumulativeProfile {
my $profile = shift;
my $result = {};
foreach my $k (keys(%{$profile})) {
my $count = $profile->{$k};
my @addrs = split(/\n/, $k);
foreach my $a (@addrs) {
AddEntry($result, $a, $count);
}
}
return $result;
}
# If the second-youngest PC on the stack is always the same, returns
# that pc. Otherwise, returns undef.
sub IsSecondPcAlwaysTheSame {
my $profile = shift;
my $second_pc = undef;
foreach my $k (keys(%{$profile})) {
my @addrs = split(/\n/, $k);
if ($#addrs < 1) {
return undef;
}
if (not defined $second_pc) {
$second_pc = $addrs[1];
} else {
if ($second_pc ne $addrs[1]) {
return undef;
}
}
}
return $second_pc;
}
sub ExtractSymbolLocation {
my $symbols = shift;
my $address = shift;
# 'addr2line' outputs "??:0" for unknown locations; we do the
# same to be consistent.
my $location = "??:0:unknown";
if (exists $symbols->{$address}) {
my $file = $symbols->{$address}->[1];
if ($file eq "?") {
$file = "??:0"
}
$location = $file . ":" . $symbols->{$address}->[0];
}
return $location;
}
# Extracts a graph of calls.
sub ExtractCalls {
my $symbols = shift;
my $profile = shift;
my $calls = {};
while( my ($stack_trace, $count) = each %$profile ) {
my @address = split(/\n/, $stack_trace);
my $destination = ExtractSymbolLocation($symbols, $address[0]);
AddEntry($calls, $destination, $count);
for (my $i = 1; $i <= $#address; $i++) {
my $source = ExtractSymbolLocation($symbols, $address[$i]);
my $call = "$source -> $destination";
AddEntry($calls, $call, $count);
$destination = $source;
}
}
return $calls;
}
sub FilterFrames {
my $symbols = shift;
my $profile = shift;
if ($main::opt_retain eq '' && $main::opt_exclude eq '') {
return $profile;
}
my $result = {};
foreach my $k (keys(%{$profile})) {
my $count = $profile->{$k};
my @addrs = split(/\n/, $k);
my @path = ();
foreach my $a (@addrs) {
my $sym;
if (exists($symbols->{$a})) {
$sym = $symbols->{$a}->[0];
} else {
$sym = $a;
}
if ($main::opt_retain ne '' && $sym !~ m/$main::opt_retain/) {
next;
}
if ($main::opt_exclude ne '' && $sym =~ m/$main::opt_exclude/) {
next;
}
push(@path, $a);
}
if (scalar(@path) > 0) {
my $reduced_path = join("\n", @path);
AddEntry($result, $reduced_path, $count);
}
}
return $result;
}
sub RemoveUninterestingFrames {
my $symbols = shift;
my $profile = shift;
# List of function names to skip
my %skip = ();
my $skip_regexp = 'NOMATCH';
if ($main::profile_type eq 'heap' || $main::profile_type eq 'growth') {
foreach my $name ('calloc',
'cfree',
'malloc',
'free',
'memalign',
'posix_memalign',
'aligned_alloc',
'pvalloc',
'valloc',
'realloc',
'mallocx', # jemalloc
'rallocx', # jemalloc
'xallocx', # jemalloc
'dallocx', # jemalloc
'sdallocx', # jemalloc
'tc_calloc',
'tc_cfree',
'tc_malloc',
'tc_free',
'tc_memalign',
'tc_posix_memalign',
'tc_pvalloc',
'tc_valloc',
'tc_realloc',
'tc_new',
'tc_delete',
'tc_newarray',
'tc_deletearray',
'tc_new_nothrow',
'tc_newarray_nothrow',
'do_malloc',
'::do_malloc', # new name -- got moved to an unnamed ns
'::do_malloc_or_cpp_alloc',
'DoSampledAllocation',
'simple_alloc::allocate',
'__malloc_alloc_template::allocate',
'__builtin_delete',
'__builtin_new',
'__builtin_vec_delete',
'__builtin_vec_new',
'operator new',
'operator new[]',
# The entry to our memory-allocation routines on OS X
'malloc_zone_malloc',
'malloc_zone_calloc',
'malloc_zone_valloc',
'malloc_zone_realloc',
'malloc_zone_memalign',
'malloc_zone_free',
# These mark the beginning/end of our custom sections
'__start_google_malloc',
'__stop_google_malloc',
'__start_malloc_hook',
'__stop_malloc_hook') {
$skip{$name} = 1;
$skip{"_" . $name} = 1; # Mach (OS X) adds a _ prefix to everything
}
# TODO: Remove TCMalloc once everything has been
# moved into the tcmalloc:: namespace and we have flushed
# old code out of the system.
$skip_regexp = "TCMalloc|^tcmalloc::";
} elsif ($main::profile_type eq 'contention') {
foreach my $vname ('base::RecordLockProfileData',
'base::SubmitMutexProfileData',
'base::SubmitSpinLockProfileData',
'Mutex::Unlock',
'Mutex::UnlockSlow',
'Mutex::ReaderUnlock',
'MutexLock::~MutexLock',
'SpinLock::Unlock',
'SpinLock::SlowUnlock',
'SpinLockHolder::~SpinLockHolder') {
$skip{$vname} = 1;
}
} elsif ($main::profile_type eq 'cpu') {
# Drop signal handlers used for CPU profile collection
# TODO(dpeng): this should not be necessary; it's taken
# care of by the general 2nd-pc mechanism below.
foreach my $name ('ProfileData::Add', # historical
'ProfileData::prof_handler', # historical
'CpuProfiler::prof_handler',
'__FRAME_END__',
'__pthread_sighandler',
'__restore') {
$skip{$name} = 1;
}
} else {
# Nothing skipped for unknown types
}
if ($main::profile_type eq 'cpu') {
# If all the second-youngest program counters are the same,
# this STRONGLY suggests that it is an artifact of measurement,
# i.e., stack frames pushed by the CPU profiler signal handler.
# Hence, we delete them.
# (The topmost PC is read from the signal structure, not from
# the stack, so it does not get involved.)
while (my $second_pc = IsSecondPcAlwaysTheSame($profile)) {
my $result = {};
my $func = '';
if (exists($symbols->{$second_pc})) {
$second_pc = $symbols->{$second_pc}->[0];
}
print STDERR "Removing $second_pc from all stack traces.\n";
foreach my $k (keys(%{$profile})) {
my $count = $profile->{$k};
my @addrs = split(/\n/, $k);
splice @addrs, 1, 1;
my $reduced_path = join("\n", @addrs);
AddEntry($result, $reduced_path, $count);
}
$profile = $result;
}
}
my $result = {};
foreach my $k (keys(%{$profile})) {
my $count = $profile->{$k};
my @addrs = split(/\n/, $k);
my @path = ();
foreach my $a (@addrs) {
if (exists($symbols->{$a})) {
my $func = $symbols->{$a}->[0];
if ($skip{$func} || ($func =~ m/$skip_regexp/)) {
# Throw away the portion of the backtrace seen so far, under the
# assumption that previous frames were for functions internal to the
# allocator.
@path = ();
next;
}
}
push(@path, $a);
}
my $reduced_path = join("\n", @path);
AddEntry($result, $reduced_path, $count);
}
$result = FilterFrames($symbols, $result);
return $result;
}
# Reduce profile to granularity given by user
sub ReduceProfile {
my $symbols = shift;
my $profile = shift;
my $result = {};
my $fullname_to_shortname_map = {};
FillFullnameToShortnameMap($symbols, $fullname_to_shortname_map);
foreach my $k (keys(%{$profile})) {
my $count = $profile->{$k};
my @translated = TranslateStack($symbols, $fullname_to_shortname_map, $k);
my @path = ();
my %seen = ();
$seen{''} = 1; # So that empty keys are skipped
foreach my $e (@translated) {
# To avoid double-counting due to recursion, skip a stack-trace
# entry if it has already been seen
if (!$seen{$e}) {
$seen{$e} = 1;
push(@path, $e);
}
}
my $reduced_path = join("\n", @path);
AddEntry($result, $reduced_path, $count);
}
return $result;
}
# Does the specified symbol array match the regexp?
sub SymbolMatches {
my $sym = shift;
my $re = shift;
if (defined($sym)) {
for (my $i = 0; $i < $#{$sym}; $i += 3) {
if ($sym->[$i] =~ m/$re/ || $sym->[$i+1] =~ m/$re/) {
return 1;
}
}
}
return 0;
}
# Focus only on paths involving specified regexps
sub FocusProfile {
my $symbols = shift;
my $profile = shift;
my $focus = shift;
my $result = {};
foreach my $k (keys(%{$profile})) {
my $count = $profile->{$k};
my @addrs = split(/\n/, $k);
foreach my $a (@addrs) {
# Reply if it matches either the address/shortname/fileline
if (($a =~ m/$focus/) || SymbolMatches($symbols->{$a}, $focus)) {
AddEntry($result, $k, $count);
last;
}
}
}
return $result;
}
# Focus only on paths not involving specified regexps
sub IgnoreProfile {
my $symbols = shift;
my $profile = shift;
my $ignore = shift;
my $result = {};
foreach my $k (keys(%{$profile})) {
my $count = $profile->{$k};
my @addrs = split(/\n/, $k);
my $matched = 0;
foreach my $a (@addrs) {
# Reply if it matches either the address/shortname/fileline
if (($a =~ m/$ignore/) || SymbolMatches($symbols->{$a}, $ignore)) {
$matched = 1;
last;
}
}
if (!$matched) {
AddEntry($result, $k, $count);
}
}
return $result;
}
# Get total count in profile
sub TotalProfile {
my $profile = shift;
my $result = 0;
foreach my $k (keys(%{$profile})) {
$result += $profile->{$k};
}
return $result;
}
# Add A to B
sub AddProfile {
my $A = shift;
my $B = shift;
my $R = {};
# add all keys in A
foreach my $k (keys(%{$A})) {
my $v = $A->{$k};
AddEntry($R, $k, $v);
}
# add all keys in B
foreach my $k (keys(%{$B})) {
my $v = $B->{$k};
AddEntry($R, $k, $v);
}
return $R;
}
# Merges symbol maps
sub MergeSymbols {
my $A = shift;
my $B = shift;
my $R = {};
foreach my $k (keys(%{$A})) {
$R->{$k} = $A->{$k};
}
if (defined($B)) {
foreach my $k (keys(%{$B})) {
$R->{$k} = $B->{$k};
}
}
return $R;
}
# Add A to B
sub AddPcs {
my $A = shift;
my $B = shift;
my $R = {};
# add all keys in A
foreach my $k (keys(%{$A})) {
$R->{$k} = 1
}
# add all keys in B
foreach my $k (keys(%{$B})) {
$R->{$k} = 1
}
return $R;
}
# Subtract B from A
sub SubtractProfile {
my $A = shift;
my $B = shift;
my $R = {};
foreach my $k (keys(%{$A})) {
my $v = $A->{$k} - GetEntry($B, $k);
if ($v < 0 && $main::opt_drop_negative) {
$v = 0;
}
AddEntry($R, $k, $v);
}
if (!$main::opt_drop_negative) {
# Take care of when subtracted profile has more entries
foreach my $k (keys(%{$B})) {
if (!exists($A->{$k})) {
AddEntry($R, $k, 0 - $B->{$k});
}
}
}
return $R;
}
# Get entry from profile; zero if not present
sub GetEntry {
my $profile = shift;
my $k = shift;
if (exists($profile->{$k})) {
return $profile->{$k};
} else {
return 0;
}
}
# Add entry to specified profile
sub AddEntry {
my $profile = shift;
my $k = shift;
my $n = shift;
if (!exists($profile->{$k})) {
$profile->{$k} = 0;
}
$profile->{$k} += $n;
}
# Add a stack of entries to specified profile, and add them to the $pcs
# list.
sub AddEntries {
my $profile = shift;
my $pcs = shift;
my $stack = shift;
my $count = shift;
my @k = ();
foreach my $e (split(/\s+/, $stack)) {
my $pc = HexExtend($e);
$pcs->{$pc} = 1;
push @k, $pc;
}
AddEntry($profile, (join "\n", @k), $count);
}
##### Code to profile a server dynamically #####
sub CheckSymbolPage {
my $url = SymbolPageURL();
my $command = ShellEscape(@URL_FETCHER, $url);
open(SYMBOL, "$command |") or error($command);
my $line = <SYMBOL>;
$line =~ s/\r//g; # turn windows-looking lines into unix-looking lines
close(SYMBOL);
unless (defined($line)) {
error("$url doesn't exist\n");
}
if ($line =~ /^num_symbols:\s+(\d+)$/) {
if ($1 == 0) {
error("Stripped binary. No symbols available.\n");
}
} else {
error("Failed to get the number of symbols from $url\n");
}
}
sub IsProfileURL {
my $profile_name = shift;
if (-f $profile_name) {
printf STDERR "Using local file $profile_name.\n";
return 0;
}
return 1;
}
sub ParseProfileURL {
my $profile_name = shift;
if (!defined($profile_name) || $profile_name eq "") {
return ();
}
# Split profile URL - matches all non-empty strings, so no test.
$profile_name =~ m,^(https?://)?([^/]+)(.*?)(/|$PROFILES)?$,;
my $proto = $1 || "http://";
my $hostport = $2;
my $prefix = $3;
my $profile = $4 || "/";
my $host = $hostport;
$host =~ s/:.*//;
my $baseurl = "$proto$hostport$prefix";
return ($host, $baseurl, $profile);
}
# We fetch symbols from the first profile argument.
sub SymbolPageURL {
my ($host, $baseURL, $path) = ParseProfileURL($main::pfile_args[0]);
return "$baseURL$SYMBOL_PAGE";
}
sub FetchProgramName() {
my ($host, $baseURL, $path) = ParseProfileURL($main::pfile_args[0]);
my $url = "$baseURL$PROGRAM_NAME_PAGE";
my $command_line = ShellEscape(@URL_FETCHER, $url);
open(CMDLINE, "$command_line |") or error($command_line);
my $cmdline = <CMDLINE>;
$cmdline =~ s/\r//g; # turn windows-looking lines into unix-looking lines
close(CMDLINE);
error("Failed to get program name from $url\n") unless defined($cmdline);
$cmdline =~ s/\x00.+//; # Remove argv[1] and latters.
$cmdline =~ s!\n!!g; # Remove LFs.
return $cmdline;
}
# Gee, curl's -L (--location) option isn't reliable at least
# with its 7.12.3 version. Curl will forget to post data if
# there is a redirection. This function is a workaround for
# curl. Redirection happens on borg hosts.
sub ResolveRedirectionForCurl {
my $url = shift;
my $command_line = ShellEscape(@URL_FETCHER, "--head", $url);
open(CMDLINE, "$command_line |") or error($command_line);
while (<CMDLINE>) {
s/\r//g; # turn windows-looking lines into unix-looking lines
if (/^Location: (.*)/) {
$url = $1;
}
}
close(CMDLINE);
return $url;
}
# Add a timeout flat to URL_FETCHER. Returns a new list.
sub AddFetchTimeout {
my $timeout = shift;
my @fetcher = @_;
if (defined($timeout)) {
if (join(" ", @fetcher) =~ m/\bcurl -s/) {
push(@fetcher, "--max-time", sprintf("%d", $timeout));
} elsif (join(" ", @fetcher) =~ m/\brpcget\b/) {
push(@fetcher, sprintf("--deadline=%d", $timeout));
}
}
return @fetcher;
}
# Reads a symbol map from the file handle name given as $1, returning
# the resulting symbol map. Also processes variables relating to symbols.
# Currently, the only variable processed is 'binary=<value>' which updates
# $main::prog to have the correct program name.
sub ReadSymbols {
my $in = shift;
my $map = {};
while (<$in>) {
s/\r//g; # turn windows-looking lines into unix-looking lines
# Removes all the leading zeroes from the symbols, see comment below.
if (m/^0x0*([0-9a-f]+)\s+(.+)/) {
$map->{$1} = $2;
} elsif (m/^---/) {
last;
} elsif (m/^([a-z][^=]*)=(.*)$/ ) {
my ($variable, $value) = ($1, $2);
for ($variable, $value) {
s/^\s+//;
s/\s+$//;
}
if ($variable eq "binary") {
if ($main::prog ne $UNKNOWN_BINARY && $main::prog ne $value) {
printf STDERR ("Warning: Mismatched binary name '%s', using '%s'.\n",
$main::prog, $value);
}
$main::prog = $value;
} else {
printf STDERR ("Ignoring unknown variable in symbols list: " .
"'%s' = '%s'\n", $variable, $value);
}
}
}
return $map;
}
sub URLEncode {
my $str = shift;
$str =~ s/([^A-Za-z0-9\-_.!~*'()])/ sprintf "%%%02x", ord $1 /eg;
return $str;
}
sub AppendSymbolFilterParams {
my $url = shift;
my @params = ();
if ($main::opt_retain ne '') {
push(@params, sprintf("retain=%s", URLEncode($main::opt_retain)));
}
if ($main::opt_exclude ne '') {
push(@params, sprintf("exclude=%s", URLEncode($main::opt_exclude)));
}
if (scalar @params > 0) {
$url = sprintf("%s?%s", $url, join("&", @params));
}
return $url;
}
# Fetches and processes symbols to prepare them for use in the profile output
# code. If the optional 'symbol_map' arg is not given, fetches symbols from
# $SYMBOL_PAGE for all PC values found in profile. Otherwise, the raw symbols
# are assumed to have already been fetched into 'symbol_map' and are simply
# extracted and processed.
sub FetchSymbols {
my $pcset = shift;
my $symbol_map = shift;
my %seen = ();
my @pcs = grep { !$seen{$_}++ } keys(%$pcset); # uniq
if (!defined($symbol_map)) {
my $post_data = join("+", sort((map {"0x" . "$_"} @pcs)));
open(POSTFILE, ">$main::tmpfile_sym");
print POSTFILE $post_data;
close(POSTFILE);
my $url = SymbolPageURL();
my $command_line;
if (join(" ", @URL_FETCHER) =~ m/\bcurl -s/) {
$url = ResolveRedirectionForCurl($url);
$url = AppendSymbolFilterParams($url);
$command_line = ShellEscape(@URL_FETCHER, "-d", "\@$main::tmpfile_sym",
$url);
} else {
$url = AppendSymbolFilterParams($url);
$command_line = (ShellEscape(@URL_FETCHER, "--post", $url)
. " < " . ShellEscape($main::tmpfile_sym));
}
# We use c++filt in case $SYMBOL_PAGE gives us mangled symbols.
my $escaped_cppfilt = ShellEscape($obj_tool_map{"c++filt"});
open(SYMBOL, "$command_line | $escaped_cppfilt |") or error($command_line);
$symbol_map = ReadSymbols(*SYMBOL{IO});
close(SYMBOL);
}
my $symbols = {};
foreach my $pc (@pcs) {
my $fullname;
# For 64 bits binaries, symbols are extracted with 8 leading zeroes.
# Then /symbol reads the long symbols in as uint64, and outputs
# the result with a "0x%08llx" format which get rid of the zeroes.
# By removing all the leading zeroes in both $pc and the symbols from
# /symbol, the symbols match and are retrievable from the map.
my $shortpc = $pc;
$shortpc =~ s/^0*//;
# Each line may have a list of names, which includes the function
# and also other functions it has inlined. They are separated (in
# PrintSymbolizedProfile), by --, which is illegal in function names.
my $fullnames;
if (defined($symbol_map->{$shortpc})) {
$fullnames = $symbol_map->{$shortpc};
} else {
$fullnames = "0x" . $pc; # Just use addresses
}
my $sym = [];
$symbols->{$pc} = $sym;
foreach my $fullname (split("--", $fullnames)) {
my $name = ShortFunctionName($fullname);
push(@{$sym}, $name, "?", $fullname);
}
}
return $symbols;
}
sub BaseName {
my $file_name = shift;
$file_name =~ s!^.*/!!; # Remove directory name
return $file_name;
}
sub MakeProfileBaseName {
my ($binary_name, $profile_name) = @_;
my ($host, $baseURL, $path) = ParseProfileURL($profile_name);
my $binary_shortname = BaseName($binary_name);
return sprintf("%s.%s.%s",
$binary_shortname, $main::op_time, $host);
}
sub FetchDynamicProfile {
my $binary_name = shift;
my $profile_name = shift;
my $fetch_name_only = shift;
my $encourage_patience = shift;
if (!IsProfileURL($profile_name)) {
return $profile_name;
} else {
my ($host, $baseURL, $path) = ParseProfileURL($profile_name);
if ($path eq "" || $path eq "/") {
# Missing type specifier defaults to cpu-profile
$path = $PROFILE_PAGE;
}
my $profile_file = MakeProfileBaseName($binary_name, $profile_name);
my $url = "$baseURL$path";
my $fetch_timeout = undef;
if ($path =~ m/$PROFILE_PAGE|$PMUPROFILE_PAGE/) {
if ($path =~ m/[?]/) {
$url .= "&";
} else {
$url .= "?";
}
$url .= sprintf("seconds=%d", $main::opt_seconds);
$fetch_timeout = $main::opt_seconds * 1.01 + 60;
# Set $profile_type for consumption by PrintSymbolizedProfile.
$main::profile_type = 'cpu';
} else {
# For non-CPU profiles, we add a type-extension to
# the target profile file name.
my $suffix = $path;
$suffix =~ s,/,.,g;
$profile_file .= $suffix;
# Set $profile_type for consumption by PrintSymbolizedProfile.
if ($path =~ m/$HEAP_PAGE/) {
$main::profile_type = 'heap';
} elsif ($path =~ m/$GROWTH_PAGE/) {
$main::profile_type = 'growth';
} elsif ($path =~ m/$CONTENTION_PAGE/) {
$main::profile_type = 'contention';
}
}
my $profile_dir = $ENV{"JEPROF_TMPDIR"} || ($ENV{HOME} . "/jeprof");
if (! -d $profile_dir) {
mkdir($profile_dir)
|| die("Unable to create profile directory $profile_dir: $!\n");
}
my $tmp_profile = "$profile_dir/.tmp.$profile_file";
my $real_profile = "$profile_dir/$profile_file";
if ($fetch_name_only > 0) {
return $real_profile;
}
my @fetcher = AddFetchTimeout($fetch_timeout, @URL_FETCHER);
my $cmd = ShellEscape(@fetcher, $url) . " > " . ShellEscape($tmp_profile);
if ($path =~ m/$PROFILE_PAGE|$PMUPROFILE_PAGE|$CENSUSPROFILE_PAGE/){
print STDERR "Gathering CPU profile from $url for $main::opt_seconds seconds to\n ${real_profile}\n";
if ($encourage_patience) {
print STDERR "Be patient...\n";
}
} else {
print STDERR "Fetching $path profile from $url to\n ${real_profile}\n";
}
(system($cmd) == 0) || error("Failed to get profile: $cmd: $!\n");
(system("mv", $tmp_profile, $real_profile) == 0) || error("Unable to rename profile\n");
print STDERR "Wrote profile to $real_profile\n";
$main::collected_profile = $real_profile;
return $main::collected_profile;
}
}
# Collect profiles in parallel
sub FetchDynamicProfiles {
my $items = scalar(@main::pfile_args);
my $levels = log($items) / log(2);
if ($items == 1) {
$main::profile_files[0] = FetchDynamicProfile($main::prog, $main::pfile_args[0], 0, 1);
} else {
# math rounding issues
if ((2 ** $levels) < $items) {
$levels++;
}
my $count = scalar(@main::pfile_args);
for (my $i = 0; $i < $count; $i++) {
$main::profile_files[$i] = FetchDynamicProfile($main::prog, $main::pfile_args[$i], 1, 0);
}
print STDERR "Fetching $count profiles, Be patient...\n";
FetchDynamicProfilesRecurse($levels, 0, 0);
$main::collected_profile = join(" \\\n ", @main::profile_files);
}
}
# Recursively fork a process to get enough processes
# collecting profiles
sub FetchDynamicProfilesRecurse {
my $maxlevel = shift;
my $level = shift;
my $position = shift;
if (my $pid = fork()) {
$position = 0 | ($position << 1);
TryCollectProfile($maxlevel, $level, $position);
wait;
} else {
$position = 1 | ($position << 1);
TryCollectProfile($maxlevel, $level, $position);
cleanup();
exit(0);
}
}
# Collect a single profile
sub TryCollectProfile {
my $maxlevel = shift;
my $level = shift;
my $position = shift;
if ($level >= ($maxlevel - 1)) {
if ($position < scalar(@main::pfile_args)) {
FetchDynamicProfile($main::prog, $main::pfile_args[$position], 0, 0);
}
} else {
FetchDynamicProfilesRecurse($maxlevel, $level+1, $position);
}
}
##### Parsing code #####
# Provide a small streaming-read module to handle very large
# cpu-profile files. Stream in chunks along a sliding window.
# Provides an interface to get one 'slot', correctly handling
# endian-ness differences. A slot is one 32-bit or 64-bit word
# (depending on the input profile). We tell endianness and bit-size
# for the profile by looking at the first 8 bytes: in cpu profiles,
# the second slot is always 3 (we'll accept anything that's not 0).
BEGIN {
package CpuProfileStream;
sub new {
my ($class, $file, $fname) = @_;
my $self = { file => $file,
base => 0,
stride => 512 * 1024, # must be a multiple of bitsize/8
slots => [],
unpack_code => "", # N for big-endian, V for little
perl_is_64bit => 1, # matters if profile is 64-bit
};
bless $self, $class;
# Let unittests adjust the stride
if ($main::opt_test_stride > 0) {
$self->{stride} = $main::opt_test_stride;
}
# Read the first two slots to figure out bitsize and endianness.
my $slots = $self->{slots};
my $str;
read($self->{file}, $str, 8);
# Set the global $address_length based on what we see here.
# 8 is 32-bit (8 hexadecimal chars); 16 is 64-bit (16 hexadecimal chars).
$address_length = ($str eq (chr(0)x8)) ? 16 : 8;
if ($address_length == 8) {
if (substr($str, 6, 2) eq chr(0)x2) {
$self->{unpack_code} = 'V'; # Little-endian.
} elsif (substr($str, 4, 2) eq chr(0)x2) {
$self->{unpack_code} = 'N'; # Big-endian
} else {
::error("$fname: header size >= 2**16\n");
}
@$slots = unpack($self->{unpack_code} . "*", $str);
} else {
# If we're a 64-bit profile, check if we're a 64-bit-capable
# perl. Otherwise, each slot will be represented as a float
# instead of an int64, losing precision and making all the
# 64-bit addresses wrong. We won't complain yet, but will
# later if we ever see a value that doesn't fit in 32 bits.
my $has_q = 0;
eval { $has_q = pack("Q", "1") ? 1 : 1; };
if (!$has_q) {
$self->{perl_is_64bit} = 0;
}
read($self->{file}, $str, 8);
if (substr($str, 4, 4) eq chr(0)x4) {
# We'd love to use 'Q', but it's a) not universal, b) not endian-proof.
$self->{unpack_code} = 'V'; # Little-endian.
} elsif (substr($str, 0, 4) eq chr(0)x4) {
$self->{unpack_code} = 'N'; # Big-endian
} else {
::error("$fname: header size >= 2**32\n");
}
my @pair = unpack($self->{unpack_code} . "*", $str);
# Since we know one of the pair is 0, it's fine to just add them.
@$slots = (0, $pair[0] + $pair[1]);
}
return $self;
}
# Load more data when we access slots->get(X) which is not yet in memory.
sub overflow {
my ($self) = @_;
my $slots = $self->{slots};
$self->{base} += $#$slots + 1; # skip over data we're replacing
my $str;
read($self->{file}, $str, $self->{stride});
if ($address_length == 8) { # the 32-bit case
# This is the easy case: unpack provides 32-bit unpacking primitives.
@$slots = unpack($self->{unpack_code} . "*", $str);
} else {
# We need to unpack 32 bits at a time and combine.
my @b32_values = unpack($self->{unpack_code} . "*", $str);
my @b64_values = ();
for (my $i = 0; $i < $#b32_values; $i += 2) {
# TODO(csilvers): if this is a 32-bit perl, the math below
# could end up in a too-large int, which perl will promote
# to a double, losing necessary precision. Deal with that.
# Right now, we just die.
my ($lo, $hi) = ($b32_values[$i], $b32_values[$i+1]);