oil AST

(command.CommandList
  children: [
    (command.CommandList
      children: [
        (command.Sentence
          child: 
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:opt_buckets)
                  op: assign_op.Equal
                  rhs: {(0)}
                  spids: [124]
                )
              ]
            )
          terminator: (Token id:Id.Op_Semi val:';' span_id:126)
        )
        (command.Sentence
          child: 
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:buckets)
                  op: assign_op.Equal
                  rhs: (word.Empty)
                  spids: [128]
                )
              ]
            )
          terminator: (Token id:Id.Op_Semi val:';' span_id:129)
        )
        (command.Sentence
          child: 
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:opt_power)
                  op: assign_op.Equal
                  rhs: {(0)}
                  spids: [131]
                )
              ]
            )
          terminator: (Token id:Id.Op_Semi val:';' span_id:133)
        )
        (command.Sentence
          child: 
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:power)
                  op: assign_op.Equal
                  rhs: {(4)}
                  spids: [135]
                )
              ]
            )
          terminator: (Token id:Id.Op_Semi val:';' span_id:137)
        )
        (command.Sentence
          child: 
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:opt_max)
                  op: assign_op.Equal
                  rhs: {(0)}
                  spids: [139]
                )
              ]
            )
          terminator: (Token id:Id.Op_Semi val:';' span_id:141)
        )
        (command.ShAssignment
          pairs: [
            (assign_pair
              lhs: (sh_lhs_expr.Name name:max)
              op: assign_op.Equal
              rhs: 
                {
                  (word_part.ArithSub
                    anode: 
                      (arith_expr.Binary
                        op_id: Id.Arith_Star
                        left: (arith_expr.ArithWord w:{(Id.Lit_Digits 1024)})
                        right: (arith_expr.ArithWord w:{(Id.Lit_Digits 1024)})
                      )
                  )
                }
              spids: [143]
            )
          ]
        )
      ]
    )
    (command.CommandList
      children: [
        (command.Sentence
          child: 
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:opt_filter)
                  op: assign_op.Equal
                  rhs: {(0)}
                  spids: [153]
                )
              ]
            )
          terminator: (Token id:Id.Op_Semi val:';' span_id:155)
        )
        (command.Sentence
          child: 
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:filter)
                  op: assign_op.Equal
                  rhs: (word.Empty)
                  spids: [157]
                )
              ]
            )
          terminator: (Token id:Id.Op_Semi val:';' span_id:158)
        )
        (command.Sentence
          child: 
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:duration)
                  op: assign_op.Equal
                  rhs: {(0)}
                  spids: [160]
                )
              ]
            )
          terminator: (Token id:Id.Op_Semi val:';' span_id:162)
        )
        (command.ShAssignment
          pairs: [
            (assign_pair
              lhs: (sh_lhs_expr.Name name:debug)
              op: assign_op.Equal
              rhs: {(0)}
              spids: [164]
            )
          ]
        )
      ]
    )
    (C {(trap)} {(SQ (Token id:Id.Lit_Chars val:':' span_id:170))} {(INT)} {(QUIT)} {(TERM)} {(PIPE)} 
      {(HUP)}
    )
    (command.ShFunction
      name: usage
      body: 
        (command.BraceGroup
          children: [
            (command.Simple
              words: [{(cat)}]
              redirects: [
                (redir.HereDoc
                  op: (Token id:Id.Redir_DLessDash val:'<<-' span_id:193)
                  fd: -1
                  here_begin: {(END)}
                  here_end_span_id: 232
                  stdin_parts: [
                    ('USAGE: perf-stat-hist [-h] [-b buckets|-P power] [-m max] [-f filter]\n')
                    ('                      tracepoint variable [seconds]\n')
                    ('                 -b buckets      # specify histogram bucket points\n')
                    ('                 -P power        # power-of (default is 4)\n')
                    ('                 -m max          # max value for power-of\n')
                    ('                 -f filter       # specify a filter \n')
                    ('                 -h              # this usage message\n')
                    ('   eg,\n')
                    ('       perf-stat-hist syscalls:sys_enter_read count 5\n')
                    ('                 # read() request histogram, 5 seconds\n')
                    ('       perf-stat-hist syscalls:sys_exit_read ret 5\n')
                    ('                 # read() return histogram, 5 seconds\n')
                    ('       perf-stat-hist -P 10 syscalls:sys_exit_read ret 5\n')
                    ('                 # ... use power-of-10\n')
                    ('       perf-stat-hist -P 2 -m 1024 syscalls:sys_exit_read ret 5\n')
                    ('                 # ... use power-of-2, max 1024\n')
                    ('       perf-stat-hist -b ')
                    (Id.Right_DoubleQuote '"')
                    ('10 50 100 500')
                    (Id.Right_DoubleQuote '"')
                    (' syscalls:sys_exit_read ret 5\n')
                    ('                 # ... histogram based on these bucket ranges\n')
                    ('       perf-stat-hist -b 10 syscalls:sys_exit_read ret 5\n')
                    ('                 # ... bifurcate by the value 10 (lowest overhead)\n')
                    ("       perf-stat-hist -f 'rwbs == ")
                    (Id.Right_DoubleQuote '"')
                    (WS)
                    (Id.Right_DoubleQuote '"')
                    ("' block:block_rq_complete nr_sector 5\n")
                    ('                 # ... synchronous writes histogram, 5 seconds\n')
                    ('\n')
                    ('See the man page and example file for more info.\n')
                  ]
                )
                (redir.Redir
                  op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:196)
                  fd: -1
                  arg_word: {(2)}
                )
              ]
            )
            (command.ControlFlow
              token: (Token id:Id.ControlFlow_Exit val:exit span_id:234)
            )
          ]
        )
    )
    (command.ShFunction
      name: die
      body: 
        (command.BraceGroup
          children: [
            (command.Simple
              words: [{(echo)} {(DQ ($ Id.VSub_At '$@'))}]
              redirects: [
                (redir.Redir
                  op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:248)
                  fd: -1
                  arg_word: {(2)}
                )
              ]
            )
            (command.ControlFlow
              token: (Token id:Id.ControlFlow_Exit val:exit span_id:256)
              arg_word: {(1)}
            )
          ]
        )
    )
    (command.WhileUntil
      keyword: (Token id:Id.KW_While val:while span_id:266)
      cond: [
        (C {(getopts)} 
          {(b) (Id.Lit_Other ':') (hm) (Id.Lit_Other ':') (P) (Id.Lit_Other ':') (f) (Id.Lit_Other ':')} {(opt)}
        )
      ]
      body: 
        (command.DoGroup
          children: [
            (command.Case
              to_match: {($ Id.VSub_DollarName '$opt')}
              arms: [
                (case_arm
                  pat_list: [{(b)}]
                  action: [
                    (command.Sentence
                      child: 
                        (command.ShAssignment
                          pairs: [
                            (assign_pair
                              lhs: (sh_lhs_expr.Name name:opt_buckets)
                              op: assign_op.Equal
                              rhs: {(1)}
                              spids: [294]
                            )
                          ]
                        )
                      terminator: (Token id:Id.Op_Semi val:';' span_id:296)
                    )
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:buckets)
                          op: assign_op.Equal
                          rhs: 
                            {
                              (sh_array_literal
                                left: (Token id:Id.Op_LParen val:'(' span_id:299)
                                words: [{($ Id.VSub_DollarName '$OPTARG')}]
                              )
                            }
                          spids: [298]
                        )
                      ]
                    )
                  ]
                  spids: [291 292 303 -1]
                )
                (case_arm
                  pat_list: [{(P)}]
                  action: [
                    (command.Sentence
                      child: 
                        (command.ShAssignment
                          pairs: [
                            (assign_pair
                              lhs: (sh_lhs_expr.Name name:opt_power)
                              op: assign_op.Equal
                              rhs: {(1)}
                              spids: [309]
                            )
                          ]
                        )
                      terminator: (Token id:Id.Op_Semi val:';' span_id:311)
                    )
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:power)
                          op: assign_op.Equal
                          rhs: {($ Id.VSub_DollarName '$OPTARG')}
                          spids: [313]
                        )
                      ]
                    )
                  ]
                  spids: [306 307 316 -1]
                )
                (case_arm
                  pat_list: [{(m)}]
                  action: [
                    (command.Sentence
                      child: 
                        (command.ShAssignment
                          pairs: [
                            (assign_pair
                              lhs: (sh_lhs_expr.Name name:opt_max)
                              op: assign_op.Equal
                              rhs: {(1)}
                              spids: [322]
                            )
                          ]
                        )
                      terminator: (Token id:Id.Op_Semi val:';' span_id:324)
                    )
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:max)
                          op: assign_op.Equal
                          rhs: {($ Id.VSub_DollarName '$OPTARG')}
                          spids: [326]
                        )
                      ]
                    )
                  ]
                  spids: [319 320 329 -1]
                )
                (case_arm
                  pat_list: [{(f)}]
                  action: [
                    (command.Sentence
                      child: 
                        (command.ShAssignment
                          pairs: [
                            (assign_pair
                              lhs: (sh_lhs_expr.Name name:opt_filter)
                              op: assign_op.Equal
                              rhs: {(1)}
                              spids: [335]
                            )
                          ]
                        )
                      terminator: (Token id:Id.Op_Semi val:';' span_id:337)
                    )
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:filter)
                          op: assign_op.Equal
                          rhs: {(DQ ($ Id.VSub_DollarName '$OPTARG') (' && '))}
                          spids: [339]
                        )
                      ]
                    )
                  ]
                  spids: [332 333 345 -1]
                )
                (case_arm
                  pat_list: [{(h)} {(Id.Lit_QMark '?')}]
                  action: [(C {(usage)})]
                  spids: [348 351 355 -1]
                )
              ]
            )
          ]
        )
    )
    (C {(shift)} 
      {
        (word_part.ArithSub
          anode: 
            (arith_expr.Binary
              op_id: Id.Arith_Minus
              left: (arith_expr.ArithWord w:{($ Id.VSub_DollarName '$OPTIND')})
              right: (arith_expr.ArithWord w:{(Id.Lit_Digits 1)})
            )
        )
      }
    )
    (command.AndOr
      ops: [Id.Op_DAmp]
      children: [
        (command.DParen
          child: 
            (arith_expr.Binary
              op_id: Id.Arith_Less
              left: (arith_expr.ArithWord w:{($ Id.VSub_Pound '$#')})
              right: (arith_expr.ArithWord w:{(Id.Lit_Digits 2)})
            )
        )
        (C {(usage)})
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:tpoint)
          op: assign_op.Equal
          rhs: {($ Id.VSub_Number '$1')}
          spids: [390]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:var)
          op: assign_op.Equal
          rhs: {($ Id.VSub_Number '$2')}
          spids: [396]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:duration)
          op: assign_op.Equal
          rhs: {(${ Id.VSub_Number 3)}
          spids: [402]
        )
      ]
    )
    (command.AndOr
      ops: [Id.Op_DAmp]
      children: [
        (command.DParen
          child: 
            (arith_expr.Binary
              op_id: Id.Arith_DAmp
              left: 
                (arith_expr.VarRef
                  token: (Token id:Id.Lit_ArithVarLike val:opt_buckets span_id:413)
                )
              right: 
                (arith_expr.VarRef
                  token: (Token id:Id.Lit_ArithVarLike val:opt_power span_id:417)
                )
            )
        )
        (C {(die)} {(DQ ('ERROR: use either -b or -P'))})
      ]
    )
    (command.AndOr
      ops: [Id.Op_DAmp]
      children: [
        (command.DParen
          child: 
            (arith_expr.Binary
              op_id: Id.Arith_DAmp
              left: (arith_expr.VarRef token:(Token id:Id.Lit_ArithVarLike val:opt_power span_id:432))
              right: 
                (arith_expr.Binary
                  op_id: Id.Arith_Less
                  left: (arith_expr.VarRef token:(Token id:Id.Lit_ArithVarLike val:power span_id:436))
                  right: (arith_expr.ArithWord w:{(Id.Lit_Digits 2)})
                )
            )
        )
        (C {(die)} {(DQ ('ERROR: -P power must be 2 or higher'))})
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Pipeline
              children: [
                (command.Simple
                  words: [
                    {(grep)}
                    {
                      (DQ ('^') ($ Id.VSub_DollarName '$tpoint') 
                        (word_part.EscapedLiteral
                          token: (Token id:Id.Lit_EscapedChar val:'\\$' span_id:466)
                        )
                      )
                    }
                    {(/sys/kernel/debug/tracing/available_events)}
                  ]
                  redirects: [
                    (redir.Redir
                      op: (Token id:Id.Redir_Great val:'>' span_id:471)
                      fd: -1
                      arg_word: {(/dev/null)}
                    )
                  ]
                )
              ]
              negated: T
            )
          ]
          action: [
            (command.Simple
              words: [
                {(echo)}
                {
                  (DQ ('ERROR: tracepoint ') 
                    (word_part.EscapedLiteral
                      token: (Token id:Id.Lit_EscapedChar val:'\\"' span_id:485)
                    ) ($ Id.VSub_DollarName '$tpoint') 
                    (word_part.EscapedLiteral
                      token: (Token id:Id.Lit_EscapedChar val:'\\"' span_id:487)
                    ) (' not found. Exiting...')
                  )
                }
              ]
              redirects: [
                (redir.Redir
                  op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:480)
                  fd: -1
                  arg_word: {(2)}
                )
              ]
            )
            (command.AndOr
              ops: [Id.Op_DAmp]
              children: [
                (command.DBracket
                  expr: 
                    (bool_expr.Binary
                      op_id: Id.BoolBinary_GlobNEqual
                      left: {(DQ ($ Id.VSub_DollarName '$USER'))}
                      right: {(DQ (root))}
                    )
                )
                (command.Simple
                  words: [{(echo)} {(DQ ('Not root user?'))}]
                  redirects: [
                    (redir.Redir
                      op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:510)
                      fd: -1
                      arg_word: {(2)}
                    )
                  ]
                )
              ]
            )
            (command.ControlFlow
              token: (Token id:Id.ControlFlow_Exit val:exit span_id:518)
              arg_word: {(1)}
            )
          ]
          spids: [457 475]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.DParen
                  child: 
                    (arith_expr.Unary
                      op_id: Id.Arith_Bang
                      child: 
                        (arith_expr.VarRef
                          token: (Token id:Id.Lit_ArithVarLike val:opt_buckets span_id:533)
                        )
                    )
                )
              terminator: (Token id:Id.Op_Semi val:';' span_id:537)
            )
          ]
          action: [
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:b)
                  op: assign_op.Equal
                  rhs: {(0)}
                  spids: [542]
                )
              ]
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:s)
                  op: assign_op.Equal
                  rhs: {(1)}
                  spids: [546]
                )
              ]
            )
            (command.WhileUntil
              keyword: (Token id:Id.KW_While val:while span_id:550)
              cond: [
                (command.Sentence
                  child: 
                    (command.DParen
                      child: 
                        (arith_expr.Binary
                          op_id: Id.Arith_LessEqual
                          left: 
                            (arith_expr.VarRef
                              token: (Token id:Id.Lit_ArithVarLike val:s span_id:554)
                            )
                          right: 
                            (arith_expr.VarRef
                              token: (Token id:Id.Lit_ArithVarLike val:max span_id:558)
                            )
                        )
                    )
                  terminator: (Token id:Id.Op_Semi val:';' span_id:562)
                )
              ]
              body: 
                (command.DoGroup
                  children: [
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:b)
                          op: assign_op.Equal
                          rhs: {(DQ ($ Id.VSub_DollarName '$b') (' ') ($ Id.VSub_DollarName '$s'))}
                          spids: [567]
                        )
                      ]
                    )
                    (command.DParen
                      child: 
                        (arith_expr.BinaryAssign
                          op_id: Id.Arith_StarEqual
                          left: (sh_lhs_expr.Name name:s)
                          right: 
                            (arith_expr.VarRef
                              token: (Token id:Id.Lit_ArithVarLike val:power span_id:581)
                            )
                        )
                    )
                  ]
                )
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:buckets)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (sh_array_literal
                        left: (Token id:Id.Op_LParen val:'(' span_id:591)
                        words: [{($ Id.VSub_DollarName '$b')}]
                      )
                    }
                  spids: [590]
                )
              ]
            )
          ]
          spids: [528 539]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:max)
          op: assign_op.Equal
          rhs: 
            {
              (braced_var_sub
                token: (Token id:Id.VSub_Name val:buckets span_id:603)
                bracket_op: 
                  (bracket_op.ArrayIndex
                    expr: 
                      (arith_expr.Binary
                        op_id: Id.Arith_Minus
                        left: 
                          (arith_expr.ArithWord
                            w: 
                              {
                                (braced_var_sub
                                  token: (Token id:Id.VSub_Name val:buckets span_id:607)
                                  prefix_op: (Id.VSub_Pound)
                                  bracket_op: (bracket_op.WholeArray op_id:Id.Lit_At)
                                )
                              }
                          )
                        right: (arith_expr.ArithWord w:{(Id.Lit_Digits 1)})
                      )
                  )
              )
            }
          spids: [601]
        )
      ]
    )
    (command.DParen
      child: 
        (arith_expr.BinaryAssign
          op_id: Id.Arith_Equal
          left: (sh_lhs_expr.Name name:max_i)
          right: 
            (arith_expr.Binary
              op_id: Id.Arith_Minus
              left: 
                (arith_expr.ArithWord
                  w: 
                    {
                      (braced_var_sub
                        token: (Token id:Id.VSub_Name val:buckets span_id:629)
                        prefix_op: (Id.VSub_Pound)
                        bracket_op: (bracket_op.WholeArray op_id:Id.Arith_Star)
                      )
                    }
                )
              right: (arith_expr.ArithWord w:{(Id.Lit_Digits 1)})
            )
        )
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:tpoints)
          op: assign_op.Equal
          rhs: 
            {
              (DQ ('-e ') ($ Id.VSub_DollarName '$tpoint') (' --filter ') 
                (word_part.EscapedLiteral
                  token: (Token id:Id.Lit_EscapedChar val:'\\"' span_id:646)
                ) ($ Id.VSub_DollarName '$filter') (' ') ($ Id.VSub_DollarName '$var') (' < ') 
                (braced_var_sub
                  token: (Token id:Id.VSub_Name val:buckets span_id:652)
                  bracket_op: (bracket_op.ArrayIndex expr:(arith_expr.ArithWord w:{(Id.Lit_Digits 0)}))
                ) (word_part.EscapedLiteral token:(Token id:Id.Lit_EscapedChar val:'\\"' span_id:657))
              )
            }
          spids: [641]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:awkarray)
          op: assign_op.Equal
          rhs: (word.Empty)
          spids: [660]
        )
      ]
    )
    (command.ShAssignment
      pairs: [(assign_pair lhs:(sh_lhs_expr.Name name:i) op:assign_op.Equal rhs:{(0)} spids:[662])]
    )
    (command.WhileUntil
      keyword: (Token id:Id.KW_While val:while span_id:665)
      cond: [
        (command.Sentence
          child: 
            (command.DParen
              child: 
                (arith_expr.Binary
                  op_id: Id.Arith_Less
                  left: (arith_expr.VarRef token:(Token id:Id.Lit_ArithVarLike val:i span_id:669))
                  right: 
                    (arith_expr.VarRef
                      token: (Token id:Id.Lit_ArithVarLike val:max_i span_id:673)
                    )
                )
            )
          terminator: (Token id:Id.Op_Semi val:';' span_id:677)
        )
      ]
      body: 
        (command.DoGroup
          children: [
            (command.If
              arms: [
                (if_arm
                  cond: [
                    (command.Sentence
                      child: 
                        (command.DParen
                          child: 
                            (arith_expr.Binary
                              op_id: Id.Arith_DAmp
                              left: 
                                (arith_expr.VarRef
                                  token: (Token id:Id.Lit_ArithVarLike val:i span_id:686)
                                )
                              right: 
                                (arith_expr.Binary
                                  op_id: Id.Arith_LessEqual
                                  left: 
                                    (arith_expr.ArithWord
                                      w: 
                                        {
                                          (braced_var_sub
                                            token: (Token id:Id.VSub_Name val:buckets span_id:691)
                                            bracket_op: 
                                              (bracket_op.ArrayIndex
                                                expr: 
                                                  (arith_expr.ArithWord
                                                    w: {($ Id.VSub_DollarName '$i')}
                                                  )
                                              )
                                          )
                                        }
                                    )
                                  right: 
                                    (arith_expr.ArithWord
                                      w: 
                                        {
                                          (braced_var_sub
                                            token: (Token id:Id.VSub_Name val:buckets span_id:700)
                                            bracket_op: 
                                              (bracket_op.ArrayIndex
                                                expr: 
                                                  (arith_expr.Binary
                                                    op_id: Id.Arith_Minus
                                                    left: 
                                                      (arith_expr.ArithWord
                                                        w: {($ Id.VSub_DollarName '$i')}
                                                      )
                                                    right: (arith_expr.ArithWord w:{(Id.Lit_Digits 1)})
                                                  )
                                              )
                                          )
                                        }
                                    )
                                )
                            )
                        )
                      terminator: (Token id:Id.Op_Semi val:';' span_id:712)
                    )
                  ]
                  action: [(C {(die)} {(DQ ('ERROR: bucket list must increase in size.'))})]
                  spids: [682 714]
                )
              ]
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:tpoints)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ ($ Id.VSub_DollarName '$tpoints') (' -e ') ($ Id.VSub_DollarName '$tpoint') 
                        (' --filter ') (word_part.EscapedLiteral token:(Token id:Id.Lit_EscapedChar val:'\\"' span_id:733)) 
                        ($ Id.VSub_DollarName '$filter') (' ') ($ Id.VSub_DollarName '$var') (' >= ') 
                        (braced_var_sub
                          token: (Token id:Id.VSub_Name val:buckets span_id:739)
                          bracket_op: 
                            (bracket_op.ArrayIndex
                              expr: (arith_expr.ArithWord w:{($ Id.VSub_DollarName '$i')})
                            )
                        ) (' && ')
                      )
                    }
                  spids: [727]
                )
              ]
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:tpoints)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ ($ Id.VSub_DollarName '$tpoints') (' ') ($ Id.VSub_DollarName '$var') (' < ') 
                        (braced_var_sub
                          token: (Token id:Id.VSub_Name val:buckets span_id:755)
                          bracket_op: 
                            (bracket_op.ArrayIndex
                              expr: 
                                (arith_expr.Binary
                                  op_id: Id.Arith_Plus
                                  left: (arith_expr.ArithWord w:{($ Id.VSub_DollarName '$i')})
                                  right: (arith_expr.ArithWord w:{(Id.Lit_Digits 1)})
                                )
                            )
                        ) (word_part.EscapedLiteral token:(Token id:Id.Lit_EscapedChar val:'\\"' span_id:764))
                      )
                    }
                  spids: [748]
                )
              ]
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:awkarray)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ ($ Id.VSub_DollarName '$awkarray') (' buckets[') ($ Id.VSub_DollarName '$i') 
                        (']=') 
                        (braced_var_sub
                          token: (Token id:Id.VSub_Name val:buckets span_id:775)
                          bracket_op: 
                            (bracket_op.ArrayIndex
                              expr: (arith_expr.ArithWord w:{($ Id.VSub_DollarName '$i')})
                            )
                        ) (';')
                      )
                    }
                  spids: [768]
                )
              ]
            )
            (command.DParen
              child: (arith_expr.UnaryAssign op_id:Id.Node_PostDPlus child:(sh_lhs_expr.Name name:i))
            )
          ]
        )
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:awkarray)
          op: assign_op.Equal
          rhs: 
            {
              (DQ ($ Id.VSub_DollarName '$awkarray') (' buckets[') ($ Id.VSub_DollarName '$max_i') 
                (']=') 
                (braced_var_sub
                  token: (Token id:Id.VSub_Name val:buckets span_id:801)
                  bracket_op: 
                    (bracket_op.ArrayIndex
                      expr: (arith_expr.ArithWord w:{($ Id.VSub_DollarName '$max_i')})
                    )
                ) (';')
              )
            }
          spids: [794]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:tpoints)
          op: assign_op.Equal
          rhs: 
            {
              (DQ ($ Id.VSub_DollarName '$tpoints') (' -e ') ($ Id.VSub_DollarName '$tpoint') 
                (' --filter ') (word_part.EscapedLiteral token:(Token id:Id.Lit_EscapedChar val:'\\"' span_id:815)) 
                ($ Id.VSub_DollarName '$filter') (' ') ($ Id.VSub_DollarName '$var') (' >= ') 
                (braced_var_sub
                  token: (Token id:Id.VSub_Name val:buckets span_id:821)
                  bracket_op: 
                    (bracket_op.ArrayIndex
                      expr: (arith_expr.ArithWord w:{($ Id.VSub_DollarName '$max_i')})
                    )
                ) (word_part.EscapedLiteral token:(Token id:Id.Lit_EscapedChar val:'\\"' span_id:826))
              )
            }
          spids: [809]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.DParen
                  child: 
                    (arith_expr.VarRef
                      token: (Token id:Id.Lit_ArithVarLike val:debug span_id:834)
                    )
                )
              terminator: (Token id:Id.Op_Semi val:';' span_id:838)
            )
          ]
          action: [
            (C {(echo)} {(buckets) (Id.Lit_Other ':')} 
              {
                (braced_var_sub
                  token: (Token id:Id.VSub_Name val:buckets span_id:849)
                  bracket_op: (bracket_op.WholeArray op_id:Id.Arith_Star)
                )
              }
            )
            (C {(echo)} {(tracepoints) (Id.Lit_Other ':')} {($ Id.VSub_DollarName '$tpoints')})
            (C {(echo)} {(awkarray) (Id.Lit_Other ':')} 
              {
                (braced_var_sub
                  token: (Token id:Id.VSub_Name val:awkarray span_id:870)
                  bracket_op: (bracket_op.WholeArray op_id:Id.Arith_Star)
                )
              }
            )
          ]
          spids: [830 840]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.DParen
                  child: 
                    (arith_expr.VarRef
                      token: (Token id:Id.Lit_ArithVarLike val:duration span_id:886)
                    )
                )
              terminator: (Token id:Id.Op_Semi val:';' span_id:890)
            )
          ]
          action: [
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:etext)
                  op: assign_op.Equal
                  rhs: {(DQ ('for ') ($ Id.VSub_DollarName '$duration') (' seconds'))}
                  spids: [895]
                )
              ]
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:cmd)
                  op: assign_op.Equal
                  rhs: {(DQ ('sleep ') ($ Id.VSub_DollarName '$duration'))}
                  spids: [903]
                )
              ]
            )
          ]
          spids: [882 892]
        )
      ]
      else_action: [
        (command.ShAssignment
          pairs: [
            (assign_pair
              lhs: (sh_lhs_expr.Name name:etext)
              op: assign_op.Equal
              rhs: {(DQ ('until Ctrl-C'))}
              spids: [912]
            )
          ]
        )
        (command.ShAssignment
          pairs: [
            (assign_pair
              lhs: (sh_lhs_expr.Name name:cmd)
              op: assign_op.Equal
              rhs: {(DQ ('sleep 999999'))}
              spids: [918]
            )
          ]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:p_tpoint)
          op: assign_op.Equal
          rhs: {($ Id.VSub_DollarName '$tpoint')}
          spids: [926]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (C {(Id.Lit_LBracket '[')} {(-n)} {(DQ ($ Id.VSub_DollarName '$filter'))} 
                  {(Id.Lit_RBracket ']')}
                )
              terminator: (Token id:Id.Op_Semi val:';' span_id:940)
            )
          ]
          action: [
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:p_tpoint)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (DQ ($ Id.VSub_DollarName '$tpoint') (' (Filter: ') 
                        (braced_var_sub
                          token: (Token id:Id.VSub_Name val:filter span_id:951)
                          suffix_op: (suffix_op.Unary op_id:Id.VOp1_Percent arg_word:{('????')})
                        ) (')')
                      )
                    }
                  spids: [946]
                )
              ]
            )
          ]
          spids: [929 942]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.DParen
                  child: 
                    (arith_expr.VarRef
                      token: (Token id:Id.Lit_ArithVarLike val:opt_buckets span_id:965)
                    )
                )
              terminator: (Token id:Id.Op_Semi val:';' span_id:969)
            )
          ]
          action: [
            (C {(echo)} 
              {
                (DQ ('Tracing ') ($ Id.VSub_DollarName '$p_tpoint') (', specified buckets, ') 
                  ($ Id.VSub_DollarName '$etext') (...)
                )
              }
            )
          ]
          spids: [961 971]
        )
      ]
      else_action: [
        (C {(echo)} 
          {
            (DQ ('Tracing ') ($ Id.VSub_DollarName '$p_tpoint') (', power-of-') 
              ($ Id.VSub_DollarName '$power') (', max ') ($ Id.VSub_DollarName '$max') (', ') ($ Id.VSub_DollarName '$etext') (...)
            )
          }
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:out)
          op: assign_op.Equal
          rhs: {(DQ ('-o /dev/stdout'))}
          spids: [1007]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:stat)
          op: assign_op.Equal
          rhs: 
            {
              (command_sub
                left_token: (Token id:Id.Left_DollarParen val:'$(' span_id:1016)
                command_list: 
                  (command.CommandList
                    children: [
                      (command.Simple
                        words: [
                          {(eval)}
                          {(perf)}
                          {(stat)}
                          {($ Id.VSub_DollarName '$tpoints')}
                          {(-a)}
                          {($ Id.VSub_DollarName '$out')}
                          {($ Id.VSub_DollarName '$cmd')}
                        ]
                        redirects: [
                          (redir.Redir
                            op: (Token id:Id.Redir_GreatAnd val:'2>&' span_id:1031)
                            fd: 2
                            arg_word: {(1)}
                          )
                        ]
                      )
                    ]
                  )
              )
            }
          spids: [1015]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.DParen
                  child: 
                    (arith_expr.Binary
                      op_id: Id.Arith_NEqual
                      left: (arith_expr.ArithWord w:{($ Id.VSub_QMark '$?')})
                      right: (arith_expr.ArithWord w:{(Id.Lit_Digits 0)})
                    )
                )
              terminator: (Token id:Id.Op_Semi val:';' span_id:1047)
            )
          ]
          action: [
            (command.Simple
              words: [{(echo)} {(DQ ('ERROR running perf:'))}]
              redirects: [
                (redir.Redir
                  op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:1054)
                  fd: -1
                  arg_word: {(2)}
                )
              ]
            )
            (command.Simple
              words: [{(echo)} {(DQ ($ Id.VSub_DollarName '$stat'))}]
              redirects: [
                (redir.Redir
                  op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:1064)
                  fd: -1
                  arg_word: {(2)}
                )
              ]
            )
            (command.ControlFlow
              token: (Token id:Id.ControlFlow_Exit val:exit span_id:1072)
            )
          ]
          spids: [1035 1049]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: [
            (command.Sentence
              child: 
                (command.DParen
                  child: 
                    (arith_expr.VarRef
                      token: (Token id:Id.Lit_ArithVarLike val:debug span_id:1081)
                    )
                )
              terminator: (Token id:Id.Op_Semi val:';' span_id:1085)
            )
          ]
          action: [
            (C {(echo)} {(raw)} {(output) (Id.Lit_Other ':')})
            (C {(echo)} {(DQ ($ Id.VSub_DollarName '$stat'))})
            (C {(echo)})
          ]
          spids: [1077 1087]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:most)
          op: assign_op.Equal
          rhs: 
            {
              (command_sub
                left_token: (Token id:Id.Left_DollarParen val:'$(' span_id:1114)
                command_list: 
                  (command.CommandList
                    children: [
                      (command.Pipeline
                        children: [
                          (C {(echo)} {(DQ ($ Id.VSub_DollarName '$stat'))})
                          (C {(awk)} {(-v)} 
                            {(Id.Lit_VarLike 'tpoint=') ($ Id.VSub_DollarName '$tpoint')} 
                            {
                              (SQ (Token id:Id.Lit_Chars val:'\n' span_id:1131) 
                                (Token
                                  id: Id.Lit_Chars
                                  val: '\t$2 == tpoint { gsub(/,/, ""); if ($1 > m) { m = $1 } }\n'
                                  span_id: 1132
                                ) (Token id:Id.Lit_Chars val:'\tEND { print m }' span_id:1133)
                              )
                            }
                          )
                        ]
                        negated: F
                      )
                    ]
                  )
              )
            }
          spids: [1113]
        )
      ]
    )
    (C {(echo)})
    (command.Pipeline
      children: [
        (C {(echo)} {(DQ ($ Id.VSub_DollarName '$stat'))})
        (C {(awk)} {(-v)} {(Id.Lit_VarLike 'tpoint=') ($ Id.VSub_DollarName '$tpoint')} {(-v)} 
          {(Id.Lit_VarLike 'max_i=') ($ Id.VSub_DollarName '$max_i')} {(-v)} {(Id.Lit_VarLike 'most=') ($ Id.VSub_DollarName '$most')} 
          {
            (SQ (Token id:Id.Lit_Chars val:'\n' span_id:1170) 
              (Token
                id: Id.Lit_Chars
                val: '\tfunction star(sval, smax, swidth) {\n'
                span_id: 1171
              ) (Token id:Id.Lit_Chars val:'\t\tstars = ""\n' span_id:1172) 
              (Token id:Id.Lit_Chars val:'\t\tif (smax == 0) return ""\n' span_id:1173) (Token id:Id.Lit_Chars val:'\t\tfor (si = 0; si < (swidth * sval / smax); si++) {\n' span_id:1174) 
              (Token id:Id.Lit_Chars val:'\t\t\tstars = stars "#"\n' span_id:1175) (Token id:Id.Lit_Chars val:'\t\t}\n' span_id:1176) 
              (Token id:Id.Lit_Chars val:'\t\treturn stars\n' span_id:1177) (Token id:Id.Lit_Chars val:'\t}\n' span_id:1178) 
              (Token id:Id.Lit_Chars val:'\tBEGIN {\n' span_id:1179) (Token id:Id.Lit_Chars val:'\t\t' span_id:1180)
            ) (DQ ($ Id.VSub_DollarName '$awkarray')) 
            (SQ (Token id:Id.Lit_Chars val:'\n' span_id:1186) 
              (Token
                id: Id.Lit_Chars
                val: '\t\tprintf("            %-15s: %-8s %s\\n", "Range", "Count",\n'
                span_id: 1187
              ) (Token id:Id.Lit_Chars val:'\t\t    "Distribution")\n' span_id:1188) 
              (Token id:Id.Lit_Chars val:'\t}\n' span_id:1189) (Token id:Id.Lit_Chars val:'\t/Performance counter stats/ { i = -1 }\n' span_id:1190) 
              (Token
                id: Id.Lit_Chars
                val: '\t# reverse order of rule set is important\n'
                span_id: 1191
              ) (Token id:Id.Lit_Chars val:'\t{ ok = 0 }\n' span_id:1192) 
              (Token
                id: Id.Lit_Chars
                val: '\t$2 == tpoint { num = $1; gsub(/,/, "", num); ok = 1 }\n'
                span_id: 1193
              ) (Token id:Id.Lit_Chars val:'\tok && i >= max_i {\n' span_id:1194) 
              (Token
                id: Id.Lit_Chars
                val: '\t\tprintf("   %10d -> %-10s: %-8s |%-38s|\\n", buckets[i],\n'
                span_id: 1195
              ) (Token id:Id.Lit_Chars val:'\t\t    "", num, star(num, most, 38))\n' span_id:1196) 
              (Token id:Id.Lit_Chars val:'\t\tnext\n' span_id:1197) (Token id:Id.Lit_Chars val:'\t}\n' span_id:1198) 
              (Token
                id: Id.Lit_Chars
                val: '\tok && i >= 0 && i < max_i {\n'
                span_id: 1199
              ) 
              (Token
                id: Id.Lit_Chars
                val: '\t\tprintf("   %10d -> %-10d: %-8s |%-38s|\\n", buckets[i],\n'
                span_id: 1200
              ) (Token id:Id.Lit_Chars val:'\t\t    buckets[i+1] - 1, num, star(num, most, 38))\n' span_id:1201) 
              (Token id:Id.Lit_Chars val:'\t\ti++\n' span_id:1202) (Token id:Id.Lit_Chars val:'\t\tnext\n' span_id:1203) (Token id:Id.Lit_Chars val:'\t}\n' span_id:1204) 
              (Token id:Id.Lit_Chars val:'\tok && i == -1 {\n' span_id:1205) (Token id:Id.Lit_Chars val:'\t\tprintf("   %10s -> %-10d: %-8s |%-38s|\\n", "",\n' span_id:1206) 
              (Token
                id: Id.Lit_Chars
                val: '\t\t    buckets[0] - 1, num, star(num, most, 38))\n'
                span_id: 1207
              ) (Token id:Id.Lit_Chars val:'\t\ti++\n' span_id:1208) (Token id:Id.Lit_Chars val:'\t}\n' span_id:1209)
            )
          }
        )
      ]
      negated: F
    )
  ]
)