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name : _dtrace
 #compdef dtrace

local curcontext="$curcontext" ret=1
local -a state line args xopts

case $OSTYPE in
  ^darwin*)
    args=(
      '-32[generate 32-bit D programs and ELF files]'
      '-64[generate 64-bit D programs and ELF files]'
      '(-A -h -l -V)-G[generate an ELF file containing embedded dtrace program]'
      '-X+[specify ISO C conformance settings for preprocessor]:ISO C conformance:((a\:"ISO plus K&R extensions (default)" c\:"Strictly conformant ISO C" s\:"K&R C only" t\:"ISO plus K&R extensions"))'
    )
    xopts=(
      'errexit[exit on error with specified status code]::status [1]'
      'noresolve[do not perform user address symbol resolution]'
      'uresolve[specify resolution of user addresses]:how:(no symbol basename absolute)'
    )
  ;;
  darwin*)
    args=(
      '*-W[wait for the named process to launch]:name'
    )
    xopts=(
      'amin[set minimum stability attributes]:attribute'
      'arch[set target data model]:arch'
      'argref[ignore additional positional command-line args]'
      'core[create core dump when exiting dtrace]'
      'cpp[run C preprocessor over D programs before compiling]'
      'cpphdrs[print each header file name used]'
      'ctypes[write all CTF definitions into a file]:file:_file'
      'debug[enable DTrace debug messages]'
      'define[add preprocessor define]:var[=val]'
      'disallow_dsym[do not use dSYM files]'
      'droptags[print drop tags to stderr]'
      'empty[allow empty D files]'
      'encoding[set encoding used for output]:encoding:(ascii utf8)'
      'errtags[prefix error message with error tags]'
      'evaltime[when to start instrumenting a new process]:when:(preinit postinit)'
      'incdir[add include file search directory]:directory:_files -/'
      'ireg[specify size of DIF integer register set]:size'
      'late[set whether references to dynamic translators are allowed]: :(dynamic static)'
      'libdir[add library search directory]:directory:_files -/'
      'mangled[show mangled symbols for C++/Swift probes]'
      'nolibs[do not include D system libraries]'
      'nojtanalysis[disable jump table analysis]'
      'noerror[do not show error messages]'
      'pgmax[set maximum number of processes DTrace can grab at the same time]:number'
      'preallocate[preallocate memory in dtrace before running the script]:size'
      'pspec[interpret ambiguous specifications as probe names]'
      'strip[strip non-loadable sections from D program]'
      'tree[show dtrace compiler parse tree at different stages]:bitmap:(1 2 4)'
      'tregs[specify size of DIF tuple register set]:size'
      'undef[add #undef into preprocessor predefines]:var name'
      'verbose[show D compiler intermediate code]'
      'version[request specific version of DTrace scripting language]:version'
      'zdefs[permit probe descriptions that match zero probes]'
      'buflimit[specify threshold percentage for early buffer switches]:percentage (1-99)'
      'temporal[whether to sort events in time order]:bool:(true false)'
      'stacksymbols[whether to symbolicate stack symbols]:bool:(true false)'
    )
  ;;
esac

xopts+=(
  'aggrate[rate of aggregation reading]:time'
  'aggsize[aggregation buffer size]:size'
  'ustackframes[number of user stack frames]:scalar'
  'bufpolicy[specify the buffer policy for the principal buffer]:policy:(fill switch ring)'
  'bufresize[buffer resizing policy]:policy:(auto manual)'
  'bufsize[size of the per-CPU principal buffer]:size'
  'cleanrate[cleaning rate (hz)]:time'
  'cpu[specify the CPU on which to enable tracing]:scalar'
  'defaultargs[allow references to unspecified macro arguments]'
  'destructive[allow destructive actions]'
  'dynvarsize[size of the dynamic variable space]:size'
  'flowindent[turn on flow indentation]'
  'grabanon[claim anonymous state]'
  'jstackframes[number of default stack frames for jstack()]:scalar'
  'jstackstrsize[default string space size for jstack()]:scalar'
  'nspec[number of speculations]:scalar'
  'quiet[set quiet mode]'
  'specsize[size of the speculation buffer]:size'
  'strsize[maximum size of strings]:size'
  'stackframes[maximum number of kernelspace stack frames to unwind for stack()]:scalar'
  'stackindent[whitespace characters to use when indenting stack() and ustack() output]:scalar'
  'statusrate[rate of status checking]:time'
  'switchrate[rate of buffer switching]:time'
  'ustackframes[maximum number of userspace stack frames to unwind for ustack()]:scalar'
  'agghist[whether to show histogram for all aggregations]:bool:(true false)'
  'aggpack[pack aggregations together]'
  'aggsortkey[sort aggregation by key]'
  'aggsortkeypos[position of aggregate key used for sorting]:position'
  'aggsortpos[position of the aggregate variable used for sorting]:position'
  'aggsortrev[sort aggregations in reverse order]'
  'aggzoom[zoom aggregation histogram to the maximum value]'
  'rawbytes[always print tracemem output in hexadecimal]'
)

_arguments -C -s $args \
  '-a[claim anonymous tracing state]' \
  '(-G -h -l -V)-A[generate driver.conf(4) directives for anonymous tracing]' \
  '-b+[set trace buffer size]:size' \
  '*-c+[run specified command and exit upon its completion]:command' \
  '-C[run cpp(1) preprocessor on script files]' \
  '*-D+[define symbol when invoking preprocessor]:name' \
  '-e[exit after compiling request but prior to enabling probes]' \
  '-f+[enable or list probes matching the specified function name]:function:->functions' \
  '-F[coalesce trace output by function]' \
  '-H[print included files when invoking preprocessor]' \
  '(-A -G -l -V)-h[generate a header file]' \
  '*-i+[enable or list probes matching the specified probe id]:probe-id' \
  '-I+[add include directory to preprocessor search path]:path:_directories' \
  '(-A -G -h -V)-l[list probes instead of enabling them]' \
  '-L+[add directory to search path for DTrace libraries]:path:_directories' \
  '*-m+[trace or list probes matching the specified module name]:module:->modules' \
  '*-n+[trace or list probes matching the specified probe name]:name:->probes' \
  '-o+[set output file]:output file:_files' \
  '-p+[grab specified process-ID and cache its symbol tables]:pid:_pids' \
  '*-P+[trace or list probes matching the specified provider name]:provider:->providers' \
  '-q[set quiet mode (only output explicitly traced data)]' \
  '*-s+[enable or list probes according to the specified D script]:script file:_files' \
  '-S[print D compiler intermediate code]' \
  '*-U+[undefine symbol when invoking preprocessor]:name' \
  '-v[set verbose mode (report program stability attributes)]' \
  '(-A -G -h -l)-V[report DTrace API version]' \
  '-w[permit destructive actions]' \
  '*-x+[enable or modify compiler and tracing options]: : _values option $xopts' \
  '-Z[permit probe descriptions that match zero probes]' && return

if [[ -n $state ]]; then
  local -a fields=( providers modules functions probes )
  local -a suf=( : : : )
  typeset -ga _cache_dtrace_probes
  (( $#_cache_dtrace_probes )) || _cache_dtrace_probes=(
      ${${${${(f)"$(_call_program dtrace-probes dtrace -l)"}[2,-1]}:#*[:[#]*}/(#b) #<-> #([^ ]#) #([^ ]#) #([^ ]#) ##([^ ]##)/${match[1]}:${match[3]:+$match[2]}:${match[3]:-$match[2]}:$match[4]}
  ) # filtering out those containing : and [, they occur on macos but may just be unmangled forms and not directly usable
  suf[${fields[(i)$state]}]=( "${compstate[quote][-1]} " ) # field matching the state gets a space suffix
  while compset -P 1 '*:'; do
    shift fields # each already listed field reduces one being possible
  done
  _tags dtrace-${^fields[1,(r)$state]}
  while _tags; do
    _requested dtrace-probes expl 'probe name' compadd -S "$suf[4]" - ${${(M)_cache_dtrace_probes:#((#s)|*:)${IPREFIX}[^:]#(#e)}##*:} && ret=0
    _requested dtrace-functions expl 'function' compadd -S "$suf[3]" - ${${${(M)_cache_dtrace_probes:#((#s)|*:)${IPREFIX}[^:]#:[^:]#(#e)}%:*}##*:} && ret=0
    _requested dtrace-modules expl 'module' compadd -S "$suf[2]" - ${${${(M)_cache_dtrace_probes:#((#s)|*:)${IPREFIX}[^:]#:[^:]#:[^:]#(#e)}#*:}%%:*} && ret=0
    _requested dtrace-providers expl 'provider' compadd -S "$suf[1]" - ${_cache_dtrace_probes%%:*} && ret=0
    (( ret )) || return 0
  done
fi

return 1
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