Class: ProcView

Inherits:
Object
  • Object
show all
Defined in:
lib/procview.rb,
lib/procview/stats.rb,
lib/procview/version.rb

Defined Under Namespace

Classes: PSTATS, Stats

Constant Summary collapse

STRACE = 
%w{ /usr/bin/env strace -Tfq -e desc,network,file,process }
LSOF = 
%w{ /usr/bin/env lsof }
VERSION = 
'0.8.4'

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts = { quiet: true, debug: nil, stat: true }) ⇒ ProcView

Returns a new instance of ProcView.



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# File 'lib/procview.rb', line 39

def initialize opts = { quiet: true, debug: nil, stat: true }
    @calls = Hash.new {|h,k| h[k] = [0,0.0]}
    @unk = [] # record handles found that were not in the map
    @iomap = Hash.new{|h,k| h[k] = ProcView::Stats.new}
    @pstats = Hash.new{|h,k| h[k] = initPstats }
    @pid    = nil # used to pass the current pid around
    @sigmap = Hash.new(0)
    @dregs  = 0.0 # store unaccounted for time here
    @pwd    = nil
    @inithandles = nil
    @opts   = opts
end

Instance Attribute Details

#calls ⇒ Object (readonly)

Returns the value of attribute calls.



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# File 'lib/procview.rb', line 19

def calls
  @calls
end

#dregs ⇒ Object (readonly)

Returns the value of attribute dregs.



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# File 'lib/procview.rb', line 19

def dregs
  @dregs
end

#inithandles=(value) ⇒ Object (writeonly)

Sets the attribute inithandles

Parameters:

  • the value to set the attribute inithandles to.



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# File 'lib/procview.rb', line 20

def inithandles=(value)
  @inithandles = value
end

#iomap ⇒ Object (readonly)

Returns the value of attribute iomap.



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# File 'lib/procview.rb', line 19

def iomap
  @iomap
end

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/procview.rb', line 19

def pid
  @pid
end

#pstats ⇒ Object (readonly)

Returns the value of attribute pstats.



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# File 'lib/procview.rb', line 19

def pstats
  @pstats
end

#pwd=(value) ⇒ Object (writeonly)

Sets the attribute pwd

Parameters:

  • the value to set the attribute pwd to.



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# File 'lib/procview.rb', line 20

def pwd=(value)
  @pwd = value
end

#sigmap ⇒ Object (readonly)

Returns the value of attribute sigmap.



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# File 'lib/procview.rb', line 19

def sigmap
  @sigmap
end

Class Method Details

.checklsof(quiet = false) ⇒ Object 



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# File 'lib/procview.rb', line 52

def self.checklsof quiet = false
    lsof = `#{(ProcView::LSOF+%w{ -v 2>&1 }).join(' ')}`
    /\s+revision:\s+(?<rev>[.\d]+)\s+/ =~ lsof
    raise "'lsof' not found! Check that it is installed and on your PATH" if rev.nil?
    STDERR.puts "Using lsof #{rev}" unless quiet
end

.checkstrace(quiet = false) ⇒ Object 



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# File 'lib/procview.rb', line 59

def self.checkstrace quiet = false
    strace = `#{(ProcView::STRACE+%w{ -V 2>&1 }).join(' ')}`
    /^strace\s+--\s+version\s+(?<rev>[.\d]+)$/ =~ strace
    raise "'strace' not found! Check that it is installed and on your PATH" if rev.nil?
    STDERR.puts "Using strace #{rev}" unless quiet
end

Instance Method Details

#digest(line) ⇒ Object 



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# File 'lib/procview.rb', line 86

def digest line

    pid = (line.slice! /^(\d+)\s+/) ? $~[1].to_i: nil

    case line
    when /^TIME\s+/
        puts "TRACED on #{$'}" unless @opts[:quiet]

    when /^REQUEST\s+/
        puts $' unless @opts[:quiet]

    when /^LSOF/
        fields = line.split /\s+/
        unless fields.size > 9
            STDERR.print "Too few fields" unless @opts[:quiet]
            return 1
        end
        pid = fields[2].to_i
        fname = fields[9..-1].join(' ')
        case fields[4]
        when 'cwd'
            raise "PID set prior to cwd" if @pid
            @pid = pid
            @pstats[@pid].cwd = fname
        when /(\d+)\w/
            handle = $1.to_i
            @pstats[@pid].hmap[handle] = fname
        else
            STDERR.print "Invalid handle" unless @opts[:quiet]
            return 1
        end

    when /^(?<call>\w+)\((?<args>.*)\)\s+=\s+\?/x # process termination has ?
        return 0

    when /^(?<call>\w+)
            \((?<args>.*)\)\s+=\s+(?<rc>-?(\d+|\?))\s*
            (?<ret>.*)\s+
            <(?<duration>.*)>$
        /x
        return handleCall(pid, $1.to_sym, $2, $3.to_i, $4, $5.to_f)

    when / <unfinished ...>/
        @pstats[pid].resume.push $`

    when /<... (\w+) resumed> /
        call = $1.to_sym
        rest = $'.chomp
        prev = @pstats[pid].resume.find_index {|f| f =~ /^#{call}/}
        unless prev
            STDERR.print "Failed to find resumable call" unless @opts[:quiet]
            return 1
        end
        first = @pstats[pid].resume.delete_at(prev)
        return digest (pid.to_s+" "+first+rest)

    when /^---\s*(\w+)\s*/
        signal = $1.to_sym
        @sigmap[signal] += 1
    when /^+++.*+++$/
    else
        STDERR.print "Unknown" unless @opts[:quiet]
        return 1
    end
    return 0
end

#handleCall(pid, call, args, rc, ret, duration) ⇒ Object 



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# File 'lib/procview.rb', line 183

def handleCall pid, call, args, rc, ret, duration
    pstat = @pstats[pid]
    case call

    when :accept, :accept4 
        fd = StraceArgs.fd! args
        accumulate pstat.hmap, fd, :other, duration
        pstat.hmap[rc] = StraceArgs.sockaddr! args

    when :clone
        StraceArgs.nextcomma! args
        flags = StraceArgs.flags! args
        @pstats[rc] = initPstats @pstats[pid], flags.include?(:CLONE_FS), flags.include?(:CLONE_FILES)
        @dregs += duration

    when :stat, :lstat
        if @opts[:stat] and rc == -1
            @dregs += duration
        else
            file = StraceArgs.name! args
            @iomap[File.absolute_path(file, pstat.cwd)].acc! :other, duration
        end

    when :execve, :access, :readlink, :chmod
        file = StraceArgs.name! args
        @iomap[File.absolute_path(file, pstat.cwd)].acc! :other, duration

    when :open, :unlink
        file = StraceArgs.name! args
        pstat.hmap[rc] = File.absolute_path(file, pstat.cwd)
        accumulate pstat.hmap, rc, :other, duration

    when :mkdir, :rmdir, :getcwd, :statfs
        file = StraceArgs.name! args
        @iomap[File.absolute_path(file, pstat.cwd)].acc! :other, duration

    when :chdir
        file = StraceArgs.name! args
        pstat.cwd = File.absolute_path(file, pstat.cwd)
        @iomap[pstat.cwd].acc! :other, duration

    when :close
        fd = StraceArgs.fd! args
        accumulate pstat.hmap, fd, :other, duration
        pstat.hmap.delete fd

    when :pipe, :pipe2
        fds = StraceArgs.afds! args
        pstat.hmap[fds[0]] = call
        accumulate pstat.hmap, fds[0], :other, duration/2.0
        pstat.hmap[fds[1]] = call
        accumulate pstat.hmap, fds[1], :other, duration/2.0

    when :socket
        pstat.hmap[rc] = Stats.new
        accumulate pstat.hmap, rc, :other, duration

    when :getsockopt, :setsockopt
        fd = StraceArgs.fd! args
        accumulate pstat.hmap, fd, :other, duration

    when :connect, :getpeername
        fd = StraceArgs.fd! args
        name = StraceArgs.sockaddr! args
        accumulate pstat.hmap, fd, :other, duration
        movetoIOmap name, fd, pstat.hmap

    when :bind
        fd = StraceArgs.fd! args
        name = StraceArgs.sockaddr! args
        accumulate pstat.hmap, fd, :other, duration
        movetoIOmap name, fd, pstat.hmap

    when :listen
        fd = StraceArgs.fd! args
        accumulate pstat.hmap, fd, :other, duration

    when :dup, :fsync
        fd = args.slice(/^\d+/).to_i
        pstat.hmap[rc] = pstat.hmap[fd]
        accumulate pstat.hmap, rc, :other, duration

    when :dup2, :dup3
        fda = StraceArgs.fd! args
        fdb = StraceArgs.fd! args
        pstat.hmap[fdb] = pstat.hmap[fda]
        accumulate pstat.hmap, fdb, :other, duration

    when :flock, :fstat, :ioctl, :fcntl, :getsockname, :shutdown
        fd = StraceArgs.fd! args
        accumulate pstat.hmap, fd, :other, duration

    # Calls classed as 'wait'

    when :select
        max = StraceArgs.fd! args
        rfds = StraceArgs.afds!(args).to_set
        wfds = StraceArgs.afds!(args).to_set
        efds = StraceArgs.afds!(args).to_set
        fds = rfds+wfds+efds
        fds.each{|fd| accumulate pstat.hmap, fd, :wait, duration/fds.size}

    when :poll, :ppoll
        fds = StraceArgs.fds(args.slice(/^\[(.*?)\]/, 1))
        if (rc > 0)
            rds = StraceArgs.fds(ret.slice(/^\(\[(.*?)\]\)/, 1))
            rds.each{|rd| accumulate pstat.hmap, rd, :wait, duration/rds.size }
        else
            fds.each{|fd| accumulate pstat.hmap, fd, :wait, duration/fds.size }
        end

    when :epoll_ctl
        epfd = StraceArgs.fd! args
        act = StraceArgs.define! args
        fd  = StraceArgs.fd! args
        case act
        when :EPOLL_CTL_ADD, :EPOLL_CTL_MOD
            pstat.emap[epfd].add fd
        when :EPOLL_CTL_DEL
            pstat.emap[epfd].delete fd
        end

    when :epoll_wait, :epoll_pwait
        epfd = StraceArgs.fd! args
        if rc < 1
            pstat.emap[epfd].each do |fd|
                accumulate pstat.hmap, fd, :wait, duration/pstat.emap[epfd].size
            end
        else
            epfds = StraceArgs.epollevents! args
            epfds.each{|fd| accumulate pstat.hmap, fd, :wait, duration/epfds.size }
        end

    when :pread, :read, :recvfrom, :lseek, :recvmsg, :getdents
        fd = StraceArgs.fd! args
        accumulate pstat.hmap, fd, :read, duration

    when :pwrite, :write, :writev, :sendto
        fd = StraceArgs.fd! args
        accumulate pstat.hmap, fd, :write, duration

    when :arch_prctl, :wait4
        @dregs += duration

    else
        STDERR.print "Unhandled call" unless @opts[:quiet]
        return 1
    end
    @calls[call][0] += 1
    @calls[call][1] += duration
    return 0
end

#initPstats(parent = nil, same_wd = false, same_fds = false) ⇒ Object 



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# File 'lib/procview.rb', line 22

def initPstats parent = nil, same_wd = false, same_fds = false
    if parent
        cwd = same_wd ? parent.cwd : parent.cwd.clone
        hmap = same_fds ? parent.hmap : parent.hmap.clone
        emap = same_fds ? parent.emap : parent.emap.clone
        return PSTATS.new( cwd, hmap, emap, [] )
    else
        stats = PSTATS.new( @pwd,
               Hash.new{|h,k| @unk.push k; h[k] = "h#{k}".to_sym;},
               Hash.new{|h,k| h[k] = Set.new},
               []
        )
        @inithandles.each {|k,v| stats.hmap[k] = v} if @inithandles
        return stats
    end
end

#load(io) ⇒ Object 



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# File 'lib/procview.rb', line 66

def load io
    badLines = 0
    while line = io.gets
        @opts[:debug].puts line if @opts[:debug]
        begin
            if digest(line) > 0
                puts ": #{line}" unless @opts[:quiet]
                badLines += 1
            end
        rescue StandardError => e
            STDERR.puts "#{e.message} (#{e.backtrace[0]}): #{line}" unless @opts[:quiet]
            badLines += 1
        end
    end
    unless @opts[:quiet]
        STDERR.puts "WARNING: Unknown handles: #{@unk.join(', ')}" if @unk.size > 0
        STDERR.puts "WARNING: #{badLines} bad lines" if badLines > 0
    end
end