(command.CommandList children: [ (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:tracing) op: assign_op.Equal rhs: {(/sys/kernel/debug/tracing)} spids: [148] ) ] ) (command.CommandList children: [ (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:flock) op: assign_op.Equal rhs: {(/var/tmp/.ftrace-lock)} spids: [151] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:153) ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:wroteflock) op: assign_op.Equal rhs: {(0)} spids: [155] ) ] ) ] ) (command.CommandList children: [ (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_duration) op: assign_op.Equal rhs: {(0)} spids: [158] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:160) ) (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:duration) op: assign_op.Equal rhs: (word.Empty) spids: [162] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:163) ) (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_pid) op: assign_op.Equal rhs: {(0)} spids: [165] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:167) ) (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:pid) op: assign_op.Equal rhs: (word.Empty) spids: [169] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:170) ) (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_tid) op: assign_op.Equal rhs: {(0)} spids: [172] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:174) ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:tid) op: assign_op.Equal rhs: (word.Empty) spids: [176] ) ] ) ] ) (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: [178] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:180) ) (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:filter) op: assign_op.Equal rhs: (word.Empty) spids: [182] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:183) ) (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_view) op: assign_op.Equal rhs: {(0)} spids: [185] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:187) ) (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_headers) op: assign_op.Equal rhs: {(0)} spids: [189] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:191) ) (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_stack) op: assign_op.Equal rhs: {(0)} spids: [193] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:195) ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:dmesg) op: assign_op.Equal rhs: {(2)} spids: [197] ) ] ) ] ) (command.CommandList children: [ (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:debug) op: assign_op.Equal rhs: {(0)} spids: [200] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:202) ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_force) op: assign_op.Equal rhs: {(0)} spids: [204] ) ] ) ] ) (C {(trap)} {(SQ (Token id:Id.Lit_Chars val:':' span_id:210))} {(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:236) fd: -1 here_begin: {(END)} here_end_span_id: 286 stdin_parts: [ ( 'USAGE: kprobe [-FhHsv] [-d secs] [-p PID] [-L TID] kprobe_definition [filter]\n' ) (' -F # force. trace despite warnings.\n') (' -d seconds # trace duration, and use buffers\n') (' -p PID # PID to match on events\n') (' -L TID # thread id to match on events\n') (" -v # view format file (don't trace)\n") (' -H # include column headers\n') (' -s # show kernel stack traces\n') (' -h # this usage message\n') ('\n') ('Note that these examples may need modification to match your kernel\n') ("version's function names and platform's register usage.\n") (' eg,\n') (' kprobe p:do_sys_open\n') (' # trace open() entry\n') (' kprobe r:do_sys_open\n') (' # trace open() return\n') (" kprobe 'r:do_sys_open ") (word_part.EscapedLiteral token: (Token id:Id.Lit_EscapedChar val:'\\$' span_id:260) ) ("retval'\n") (' # trace open() return value\n') (" kprobe 'r:myopen do_sys_open ") (word_part.EscapedLiteral token: (Token id:Id.Lit_EscapedChar val:'\\$' span_id:264) ) ("retval'\n") (' # use a custom probe name\n') (" kprobe 'p:myopen do_sys_open mode=%cx:u16'\n") (' # trace open() file mode\n') (" kprobe 'p:myopen do_sys_open filename=+0(%si):string'\n") (' # trace open() with filename\n') (" kprobe -s 'p:myprobe tcp_retransmit_skb'\n") (' # show kernel stacks\n') (" kprobe 'p:do_sys_open file=+0(%si):string' 'file ~ ") (Id.Right_DoubleQuote '"') ('*stat') (Id.Right_DoubleQuote '"') ("'\n") (' # opened files ending in ') (Id.Right_DoubleQuote '"') (stat) (Id.Right_DoubleQuote '"') ('\n') ('\n') ('See the man page and example file for more info.\n') ] ) (redir.Redir op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:239) fd: -1 arg_word: {(2)} ) ] ) (command.ControlFlow token: (Token id:Id.ControlFlow_Exit val:exit span_id:288) ) ] ) ) (command.ShFunction name: warn body: (command.BraceGroup children: [ (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.Pipeline children: [(C {(eval)} {(DQ ($ Id.VSub_At '$@'))})] negated: T ) terminator: (Token id:Id.Op_Semi val:';' span_id:309) ) ] action: [ (command.Simple words: [ {(echo)} { (DQ ('WARNING: command failed ') (word_part.EscapedLiteral token: (Token id:Id.Lit_EscapedChar val:'\\"' span_id:321) ) ($ Id.VSub_At '$@') (word_part.EscapedLiteral token: (Token id:Id.Lit_EscapedChar val:'\\"' span_id:323) ) ) } ] redirects: [ (redir.Redir op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:316) fd: -1 arg_word: {(2)} ) ] ) ] spids: [300 311] ) ] ) ] ) ) (command.ShFunction name: end body: (command.BraceGroup children: [ (command.Simple words: [{(echo)}] redirects: [ (redir.Redir op: (Token id:Id.Redir_Great val:'2>' span_id:345) fd: 2 arg_word: {(/dev/null)} ) ] ) (command.Simple words: [{(echo)} {(DQ ('Ending tracing...'))}] redirects: [ (redir.Redir op: (Token id:Id.Redir_Great val:'2>' span_id:355) fd: 2 arg_word: {(/dev/null)} ) ] ) (C {(cd)} {($ Id.VSub_DollarName '$tracing')}) (C {(warn)} {(DQ ('echo 0 > events/kprobes/') ($ Id.VSub_DollarName '$kname') (/enable))}) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DParen child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_filter span_id:377) ) ) terminator: (Token id:Id.Op_Semi val:';' span_id:381) ) ] action: [ (C {(warn)} {(DQ ('echo 0 > events/kprobes/') ($ Id.VSub_DollarName '$kname') (/filter))} ) ] spids: [373 383] ) ] ) (C {(warn)} {(DQ ('echo -:') ($ Id.VSub_DollarName '$kname') (' >> kprobe_events'))}) (command.AndOr ops: [Id.Op_DAmp] children: [ (command.DParen child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_stack span_id:409) ) ) (C {(warn)} {(DQ ('echo 0 > options/stacktrace'))}) ] ) (C {(warn)} {(DQ ('echo > trace'))}) (command.AndOr ops: [Id.Op_DAmp] children: [ (command.DParen child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:wroteflock span_id:432) ) ) (C {(warn)} {(DQ ('rm ') ($ Id.VSub_DollarName '$flock'))}) ] ) ] ) ) (command.ShFunction name: die body: (command.BraceGroup children: [ (command.Simple words: [{(echo)} {(DQ ($ Id.VSub_At '$@'))}] redirects: [ (redir.Redir op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:458) fd: -1 arg_word: {(2)} ) ] ) (command.ControlFlow token: (Token id:Id.ControlFlow_Exit val:exit span_id:466) arg_word: {(1)} ) ] ) ) (command.ShFunction name: edie body: (command.BraceGroup children: [ (command.Simple words: [{(echo)} {(DQ ($ Id.VSub_At '$@'))}] redirects: [ (redir.Redir op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:486) fd: -1 arg_word: {(2)} ) ] ) (command.Simple words: [{(exec)}] redirects: [ (redir.Redir op: (Token id:Id.Redir_Great val:'>' span_id:496) fd: -1 arg_word: {(/dev/null)} ) (redir.Redir op: (Token id:Id.Redir_GreatAnd val:'2>&' span_id:499) fd: 2 arg_word: {(1)} ) ] ) (C {(end)}) (command.ControlFlow token: (Token id:Id.ControlFlow_Exit val:exit span_id:506) arg_word: {(1)} ) ] ) ) (command.WhileUntil keyword: (Token id:Id.KW_While val:while span_id:516) cond: [ (C {(getopts)} {(Fd) (Id.Lit_Other ':') (hHp) (Id.Lit_Other ':') (L) (Id.Lit_Other ':') (sv)} {(opt)} ) ] body: (command.DoGroup children: [ (command.Case to_match: {($ Id.VSub_DollarName '$opt')} arms: [ (case_arm pat_list: [{(F)}] action: [ (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_force) op: assign_op.Equal rhs: {(1)} spids: [543] ) ] ) ] spids: [540 541 546 -1] ) (case_arm pat_list: [{(d)}] action: [ (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_duration) op: assign_op.Equal rhs: {(1)} spids: [552] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:554) ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:duration) op: assign_op.Equal rhs: {($ Id.VSub_DollarName '$OPTARG')} spids: [556] ) ] ) ] spids: [549 550 559 -1] ) (case_arm pat_list: [{(p)}] action: [ (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_pid) op: assign_op.Equal rhs: {(1)} spids: [565] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:567) ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:pid) op: assign_op.Equal rhs: {($ Id.VSub_DollarName '$OPTARG')} spids: [569] ) ] ) ] spids: [562 563 572 -1] ) (case_arm pat_list: [{(L)}] action: [ (command.Sentence child: (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_tid) op: assign_op.Equal rhs: {(1)} spids: [578] ) ] ) terminator: (Token id:Id.Op_Semi val:';' span_id:580) ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:tid) op: assign_op.Equal rhs: {($ Id.VSub_DollarName '$OPTARG')} spids: [582] ) ] ) ] spids: [575 576 585 -1] ) (case_arm pat_list: [{(H)}] action: [ (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_headers) op: assign_op.Equal rhs: {(1)} spids: [591] ) ] ) ] spids: [588 589 594 -1] ) (case_arm pat_list: [{(s)}] action: [ (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_stack) op: assign_op.Equal rhs: {(1)} spids: [600] ) ] ) ] spids: [597 598 603 -1] ) (case_arm pat_list: [{(v)}] action: [ (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_view) op: assign_op.Equal rhs: {(1)} spids: [609] ) ] ) ] spids: [606 607 612 -1] ) (case_arm pat_list: [{(h)} {(Id.Lit_QMark '?')}] action: [(C {(usage)})] spids: [615 618 622 -1] ) ] ) ] ) ) (C {(shift)} { (word_part.ArithSub anode: (arith_expr.Binary op_id: Id.Arith_Minus left: (arith_expr.ArithWord w:{($ Id.VSub_DollarName '$OPTIND')}) right: (arith_expr.ArithWord w:{(Id.Lit_Digits 1)}) ) ) } ) (command.AndOr ops: [Id.Op_DPipe] children: [(command.DParen child:(arith_expr.ArithWord w:{($ Id.VSub_Pound '$#')})) (C {(usage)})] ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:kprobe) op: assign_op.Equal rhs: {($ Id.VSub_Number '$1')} spids: [653] ) ] ) (C {(shift)}) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DParen child:(arith_expr.ArithWord w:{($ Id.VSub_Pound '$#')})) terminator: (Token id:Id.Op_Semi val:';' span_id:666) ) ] action: [ (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_filter) op: assign_op.Equal rhs: {(1)} spids: [671] ) ] ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:filter) op: assign_op.Equal rhs: {($ Id.VSub_Number '$1')} spids: [675] ) ] ) ] spids: [658 668] ) ] ) (command.AndOr ops: [Id.Op_DAmp] children: [ (command.DParen child: (arith_expr.Binary op_id: Id.Arith_Great left: (arith_expr.Binary op_id: Id.Arith_Plus left: (arith_expr.Binary op_id: Id.Arith_Plus left: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_pid span_id:686) ) right: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_filter span_id:690) ) ) right: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_tid span_id:694) ) ) right: (arith_expr.ArithWord w:{(Id.Lit_Digits 1)}) ) ) (C {(die)} {(DQ ('ERROR: use at most one of -p, -L, or filter.'))}) ] ) (command.AndOr ops: [Id.Op_DAmp] children: [ (command.DParen child: (arith_expr.Binary op_id: Id.Arith_DAmp left: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_duration span_id:715) ) right: (arith_expr.VarRef token:(Token id:Id.Lit_ArithVarLike val:opt_view span_id:719)) ) ) (C {(die)} {(DQ ('ERROR: use either -d or -v.'))}) ] ) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DParen child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_pid span_id:736) ) ) terminator: (Token id:Id.Op_Semi val:';' span_id:740) ) ] action: [ (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_filter) op: assign_op.Equal rhs: {(1)} spids: [749] ) ] ) (command.ForEach iter_name: tid iter_words: [{(/proc/) ($ Id.VSub_DollarName '$pid') (/task/) (Id.Lit_Star '*')}] do_arg_iter: F body: (command.DoGroup children: [ (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:filter) op: assign_op.Equal rhs: { (DQ ($ Id.VSub_DollarName '$filter') (' || common_pid == ') (braced_var_sub token: (Token id:Id.VSub_Name val:tid span_id:777) suffix_op: (suffix_op.Unary op_id: Id.VOp1_DPound arg_word: {('*') (Id.Lit_Slash /)} ) ) ) } spids: [772] ) ] ) ] ) ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:filter) op: assign_op.Equal rhs: { (braced_var_sub token: (Token id:Id.VSub_Name val:filter span_id:790) suffix_op: (suffix_op.Slice begin:(arith_expr.ArithWord w:{(Id.Lit_Digits 3)})) ) } spids: [788] ) ] ) ] spids: [732 742] ) ] ) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DParen child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_tid span_id:804) ) ) terminator: (Token id:Id.Op_Semi val:';' span_id:808) ) ] action: [ (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:opt_filter) op: assign_op.Equal rhs: {(1)} spids: [813] ) ] ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:filter) op: assign_op.Equal rhs: {(DQ ('common_pid == ') ($ Id.VSub_DollarName '$tid'))} spids: [817] ) ] ) ] spids: [800 810] ) ] ) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DBracket expr: (bool_expr.LogicalAnd left: (bool_expr.Binary op_id: Id.BoolBinary_GlobNEqual left: {(DQ ($ Id.VSub_DollarName '$kprobe'))} right: {(p) (Id.Lit_Other ':') (Id.Lit_Other '*')} ) right: (bool_expr.Binary op_id: Id.BoolBinary_GlobNEqual left: {(DQ ($ Id.VSub_DollarName '$kprobe'))} right: {(r) (Id.Lit_Other ':') (Id.Lit_Other '*')} ) ) ) terminator: (Token id:Id.Op_Semi val:';' span_id:852) ) ] action: [ (command.Simple words: [{(echo)} {(DQ ('ERROR: invalid kprobe definition (should start with p: or r:)'))}] redirects: [ (redir.Redir op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:859) fd: -1 arg_word: {(2)} ) ] ) (C {(usage)}) ] spids: [825 854] ) ] ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:krest) op: assign_op.Equal rhs: { (braced_var_sub token: (Token id:Id.VSub_Name val:kprobe span_id:909) suffix_op: (suffix_op.Unary op_id:Id.VOp1_Pound arg_word:{('*:')}) ) } spids: [907] ) ] ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:kname) op: assign_op.Equal rhs: { (braced_var_sub token: (Token id:Id.VSub_Name val:krest span_id:916) suffix_op: (suffix_op.Unary op_id:Id.VOp1_DPercent arg_word:{(' *')}) ) } spids: [914] ) ] ) (C {(Id.KW_Set set)} {(--)} {($ Id.VSub_DollarName '$krest')}) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DBracket expr: (bool_expr.LogicalOr left: (bool_expr.Binary op_id: Id.BoolBinary_GlobDEqual left: {($ Id.VSub_Number '$2')} right: {(DQ )} ) right: (bool_expr.Binary op_id: Id.BoolBinary_GlobDEqual left: {($ Id.VSub_Number '$2')} right: {(Id.Lit_Other '*') (Id.Lit_Other '[') (Id.BoolBinary_GlobEqual '=') (Id.Lit_Other '%') (word_part.EscapedLiteral token:(Token id:Id.Lit_EscapedChar val:'\\$' span_id:948)) (Id.Lit_Other ']') (Id.Lit_Other '*') } ) ) ) terminator: (Token id:Id.Op_Semi val:';' span_id:953) ) ] action: [ (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:ktype) op: assign_op.Equal rhs: { (braced_var_sub token: (Token id:Id.VSub_Name val:kprobe span_id:964) suffix_op: (suffix_op.Unary op_id:Id.VOp1_DPercent arg_word:{(':*')}) ) } spids: [962] ) ] ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:kprobe) op: assign_op.Equal rhs: { (DQ ($ Id.VSub_DollarName '$ktype') (':') ($ Id.VSub_DollarName '$kname') (' ') ($ Id.VSub_DollarName '$krest') ) } spids: [970] ) ] ) ] spids: [927 955] ) ] ) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DParen child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:debug span_id:985) ) ) terminator: (Token id:Id.Op_Semi val:';' span_id:989) ) ] action: [ (C {(echo)} { (DQ ('kname: ') ($ Id.VSub_DollarName '$kname') (', kprobe: ') ($ Id.VSub_DollarName '$kprobe') ) } ) ] spids: [981 991] ) ] ) (command.AndOr ops: [Id.Op_DPipe] children: [ (C {(cd)} {($ Id.VSub_DollarName '$tracing')}) (C {(die)} { (DQ ('ERROR: accessing tracing. Root user? Kernel has FTRACE?\n') (' debugfs mounted? (mount -t debugfs debugfs /sys/kernel/debug)') ) } ) ] ) (C {(Id.KW_Set set)} {(--)} {($ Id.VSub_DollarName '$kprobe')}) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:fname) op: assign_op.Equal rhs: {($ Id.VSub_Number '$2')} spids: [1032] ) ] ) (command.If arms: [ (if_arm cond: [ (command.AndOr ops: [Id.Op_DAmp] children: [ (command.DParen child: (arith_expr.Unary op_id: Id.Arith_Bang child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_force span_id:1040) ) ) ) (command.Pipeline children: [ (command.Simple words: [ {(grep)} {(-w)} {($ Id.VSub_DollarName '$fname')} {(available_filter_functions)} ] redirects: [ (redir.Redir op: (Token id:Id.Redir_Great val:'>' span_id:1057) fd: -1 arg_word: {(/dev/null)} ) (redir.Redir op: (Token id:Id.Redir_GreatAnd val:'2>&' span_id:1062) fd: 2 arg_word: {(1)} ) ] ) ] negated: T ) ] ) ] action: [ (command.Simple words: [ {(echo)} { (DQ ('ERROR: func ') ($ Id.VSub_DollarName '$fname') (' not in ') ($ Id.VSub_DollarName '$PWD') (/available_filter_functions.) ) } ] redirects: [ (redir.Redir op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:1070) fd: -1 arg_word: {(2)} ) ] ) (command.Simple words: [{(printf)} {(DQ ("Either it doesn't exist, or, it might be unsafe to kprobe. "))}] redirects: [ (redir.Redir op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:1084) fd: -1 arg_word: {(2)} ) ] ) (command.Simple words: [{(echo)} {(DQ ('Exiting. Use -F to override.'))}] redirects: [ (redir.Redir op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:1094) fd: -1 arg_word: {(2)} ) ] ) (command.ControlFlow token: (Token id:Id.ControlFlow_Exit val:exit span_id:1102) arg_word: {(1)} ) ] spids: [1035 1065] ) ] ) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DParen child: (arith_expr.Unary op_id: Id.Arith_Bang child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_view span_id:1114) ) ) ) terminator: (Token id:Id.Op_Semi val:';' span_id:1118) ) ] action: [ (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DParen child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_duration span_id:1127) ) ) terminator: (Token id:Id.Op_Semi val:';' span_id:1131) ) ] action: [ (C {(echo)} { (DQ ('Tracing kprobe ') ($ Id.VSub_DollarName '$kname') (' for ') ($ Id.VSub_DollarName '$duration') (' seconds (buffered)...') ) } ) ] spids: [1123 1133] ) ] else_action: [ (C {(echo)} {(DQ ('Tracing kprobe ') ($ Id.VSub_DollarName '$kname') ('. Ctrl-C to end.'))} ) ] ) ] spids: [1109 1120] ) ] ) (command.AndOr ops: [Id.Op_DAmp] children: [ (command.DBracket expr: (bool_expr.Unary op_id:Id.BoolUnary_e child:{($ Id.VSub_DollarName '$flock')}) ) (C {(die)} { (DQ ('ERROR: ftrace may be in use by PID ') (command_sub left_token: (Token id:Id.Left_DollarParen val:'$(' span_id:1181) command_list: (command.CommandList children: [(C {(cat)} {($ Id.VSub_DollarName '$flock')})] ) ) (' ') ($ Id.VSub_DollarName '$flock') ) } ) ] ) (command.AndOr ops: [Id.Op_DPipe] children: [ (command.Simple words: [{(echo)} {($ Id.VSub_Dollar '$$')}] redirects: [ (redir.Redir op: (Token id:Id.Redir_Great val:'>' span_id:1194) fd: -1 arg_word: {($ Id.VSub_DollarName '$flock')} ) ] ) (C {(die)} {(DQ ('ERROR: unable to write ') ($ Id.VSub_DollarName '$flock') (.))}) ] ) (command.ShAssignment pairs: [ (assign_pair lhs: (sh_lhs_expr.Name name:wroteflock) op: assign_op.Equal rhs: {(1)} spids: [1208] ) ] ) (command.Simple words: [{(echo)} {(nop)}] redirects: [ (redir.Redir op: (Token id:Id.Redir_Great val:'>' span_id:1219) fd: -1 arg_word: {(current_tracer)} ) ] ) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.Pipeline children: [ (command.Simple words: [{(echo)} {(DQ ($ Id.VSub_DollarName '$kprobe'))}] redirects: [ (redir.Redir op: (Token id:Id.Redir_DGreat val:'>>' span_id:1233) fd: -1 arg_word: {(kprobe_events)} ) ] ) ] negated: T ) terminator: (Token id:Id.Op_Semi val:';' span_id:1236) ) ] action: [ (command.Simple words: [ {(echo)} { (DQ ('ERROR: adding kprobe ') (word_part.EscapedLiteral token: (Token id:Id.Lit_EscapedChar val:'\\"' span_id:1248) ) ($ Id.VSub_DollarName '$kprobe') (word_part.EscapedLiteral token: (Token id:Id.Lit_EscapedChar val:'\\"' span_id:1250) ) (.) ) } ] redirects: [ (redir.Redir op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:1243) fd: -1 arg_word: {(2)} ) ] ) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DParen child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:dmesg span_id:1259) ) ) terminator: (Token id:Id.Op_Semi val:';' span_id:1263) ) ] action: [ (command.Simple words: [ {(echo)} { (DQ ('Last ') ($ Id.VSub_DollarName '$dmesg') (' dmesg entries (might contain reason):') ) } ] redirects: [ (redir.Redir op: (Token id:Id.Redir_GreatAnd val:'>&' span_id:1270) fd: -1 arg_word: {(2)} ) ] ) (command.Pipeline children: [ (C {(dmesg)}) (C {(tail)} {(-) ($ Id.VSub_DollarName '$dmesg')}) (C {(sed)} {(SQ (Token id:Id.Lit_Chars val:'s/^/ /' span_id:1294))}) ] negated: F ) ] spids: [1255 1265] ) ] ) (C {(edie)} {(DQ (Exiting.))}) ] spids: [1223 1238] ) ] ) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DParen child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_view span_id:1313) ) ) terminator: (Token id:Id.Op_Semi val:';' span_id:1317) ) ] action: [ (C {(cat)} {(events/kprobes/) ($ Id.VSub_DollarName '$kname') (/format)}) (C {(edie)} {(DQ )}) ] spids: [1309 1319] ) ] ) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DParen child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_filter span_id:1340) ) ) terminator: (Token id:Id.Op_Semi val:';' span_id:1344) ) ] action: [ (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.Pipeline children: [ (command.Simple words: [{(echo)} {(DQ ($ Id.VSub_DollarName '$filter'))}] redirects: [ (redir.Redir op: (Token id:Id.Redir_Great val:'>' span_id:1359) fd: -1 arg_word: {(events/kprobes/) ($ Id.VSub_DollarName '$kname') (/filter)} ) ] ) ] negated: T ) terminator: (Token id:Id.Op_Semi val:';' span_id:1364) ) ] action: [(C {(edie)} {(DQ ('ERROR: setting filter or -p. Exiting.'))})] spids: [1349 1366] ) ] ) ] spids: [1336 1346] ) ] ) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DParen child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_stack span_id:1384) ) ) terminator: (Token id:Id.Op_Semi val:';' span_id:1388) ) ] action: [ (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.Pipeline children: [ (command.Simple words: [{(echo)} {(1)}] redirects: [ (redir.Redir op: (Token id:Id.Redir_Great val:'>' span_id:1401) fd: -1 arg_word: {(options/stacktrace)} ) ] ) ] negated: T ) terminator: (Token id:Id.Op_Semi val:';' span_id:1404) ) ] action: [(C {(edie)} {(DQ ('ERROR: enabling stack traces (-s). Exiting'))})] spids: [1393 1406] ) ] ) ] spids: [1380 1390] ) ] ) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.Pipeline children: [ (command.Simple words: [{(echo)} {(1)}] redirects: [ (redir.Redir op: (Token id:Id.Redir_Great val:'>' span_id:1428) fd: -1 arg_word: {(events/kprobes/) ($ Id.VSub_DollarName '$kname') (/enable)} ) ] ) ] negated: T ) terminator: (Token id:Id.Op_Semi val:';' span_id:1433) ) ] action: [ (C {(edie)} {(DQ ('ERROR: enabling kprobe ') ($ Id.VSub_DollarName '$kname') ('. Exiting.'))} ) ] spids: [1420 1435] ) ] ) (C {(warn)} {(DQ ('echo > trace'))}) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DParen child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_duration span_id:1462) ) ) terminator: (Token id:Id.Op_Semi val:';' span_id:1466) ) ] action: [ (C {(sleep)} {($ Id.VSub_DollarName '$duration')}) (command.If arms: [ (if_arm cond: [ (command.Sentence child: (command.DParen child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_headers span_id:1480) ) ) terminator: (Token id:Id.Op_Semi val:';' span_id:1484) ) ] action: [(C {(cat)} {(trace)})] spids: [1476 1486] ) ] else_action: [ (C {(grep)} {(-v)} {(SQ (Token id:Id.Lit_Chars val:'^#' span_id:1502))} {(trace)}) ] ) ] spids: [1458 1468] ) ] else_action: [ (command.AndOr ops: [Id.Op_DAmp] children: [ (command.DParen child: (arith_expr.VarRef token: (Token id:Id.Lit_ArithVarLike val:opt_headers span_id:1519) ) ) (C {(cat)} {(trace)}) ] ) (C {(cat)} {(trace_pipe)}) ] ) (C {(end)}) ] )