instrumentation/syscalls/lttng-syscalls-generate-headers.sh

   1 #!/bin/sh
   2
   3 # Generate system call probe description macros from syscall metadata dump file.
   4 # example usage:
   5 # lttng-syscalls-generate-headers.sh 3.0.4 x86-64-syscalls-3.0.4
   6
   7 INPUTDIR=$1
   8 INPUTFILE=$2
   9 INPUT=${INPUTDIR}/${INPUTFILE}
  10 SRCFILE=gen.tmp.0
  11 TMPFILE=gen.tmp.1
  12
  13 cp ${INPUT} ${SRCFILE}
  14
  15 #Cleanup
  16 sed 's/^\[.*\] //g' ${SRCFILE} > ${TMPFILE}
  17 mv ${TMPFILE} ${SRCFILE}
  18
  19 sed 's/^syscall sys_\([^ ]*\)/syscall \1/g' ${SRCFILE} > ${TMPFILE}
  20 mv ${TMPFILE} ${SRCFILE}
  21
  22 #Filter
  23
  24 #select only syscalls we currently support
  25 #move non-pointers with and without arguments to a integer-only file.
  26 CLASS=integers
  27 grep -v "\\*\|cap_user_header_t" ${SRCFILE} > ${TMPFILE}
  28 mv ${TMPFILE} ${SRCFILE}
  29
  30 #TODO
  31 # move all system calls using pointers to a separate file.
  32 #CLASS=pointers
  33 #grep "\\*\|cap_#user_header_t" ${SRCFILE} > ${TMPFILE}
  34 #mv ${TMPFILE} ${SRCFILE}
  35
  36 HEADER=headers/${INPUTFILE}-${CLASS}.h
  37
  38 echo "/* THIS FILE IS AUTO-GENERATED. DO NOT EDIT */" > ${HEADER}
  39
  40 echo \
  41 "#ifndef CREATE_SYSCALL_TABLE
  42
  43 #undef TRACE_SYSTEM
  44 #define TRACE_SYSTEM syscalls
  45
  46 #if !defined(_TRACE_SYSCALLS_H) || defined(TRACE_HEADER_MULTI_READ)
  47 #define _TRACE_SYSCALLS_H
  48
  49 #include <linux/tracepoint.h>
  50 #include <linux/syscalls.h>
  51 " >> ${HEADER}
  52
  53 NRARGS=0
  54
  55 echo \
  56 'DECLARE_EVENT_CLASS_NOARGS(syscalls_noargs,\n'\
  57 '       TP_STRUCT__entry(),\n'\
  58 '       TP_fast_assign(),\n'\
  59 '       TP_printk()\n'\
  60 ')'\
  61         >> ${HEADER}
  62
  63 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
  64 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) '\
  65 'types: (\([^)]*\)) '\
  66 'args: (\([^)]*\))/'\
  67 'DEFINE_EVENT_NOARGS(syscalls_noargs, sys_\1)'\
  68 '/g'\
  69         ${TMPFILE} >> ${HEADER}
  70
  71
  72 # types: 4
  73 # args   5
  74
  75 NRARGS=1
  76 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
  77 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) '\
  78 'types: (\([^)]*\)) '\
  79 'args: (\([^)]*\))/'\
  80 'TRACE_EVENT(sys_\1,\n'\
  81 '       TP_PROTO(\4 \5),\n'\
  82 '       TP_ARGS(\5),\n'\
  83 '       TP_STRUCT__entry(__field(\4, \5)),\n'\
  84 '       TP_fast_assign(tp_assign(\5, \5)),\n'\
  85 '       TP_printk()\n'\
  86 ')/g'\
  87         ${TMPFILE} >> ${HEADER}
  88
  89 # types: 4 5
  90 # args   6 7
  91
  92 NRARGS=2
  93 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
  94 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) '\
  95 'types: (\([^,]*\), \([^)]*\)) '\
  96 'args: (\([^,]*\), \([^)]*\))/'\
  97 'TRACE_EVENT(sys_\1,\n'\
  98 '       TP_PROTO(\4 \6, \5 \7),\n'\
  99 '       TP_ARGS(\6, \7),\n'\
 100 '       TP_STRUCT__entry(__field(\4, \6) __field(\5, \7)),\n'\
 101 '       TP_fast_assign(tp_assign(\6, \6) tp_assign(\7, \7)),\n'\
 102 '       TP_printk()\n'\
 103 ')/g'\
 104         ${TMPFILE} >> ${HEADER}
 105
 106 # types: 4 5 6
 107 # args   7 8 9
 108
 109 NRARGS=3
 110 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 111 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) '\
 112 'types: (\([^,]*\), \([^,]*\), \([^)]*\)) '\
 113 'args: (\([^,]*\), \([^,]*\), \([^)]*\))/'\
 114 'TRACE_EVENT(sys_\1,\n'\
 115 '       TP_PROTO(\4 \7, \5 \8, \6 \9),\n'\
 116 '       TP_ARGS(\7, \8, \9),\n'\
 117 '       TP_STRUCT__entry(__field(\4, \7) __field(\5, \8) __field(\6, \9)),\n'\
 118 '       TP_fast_assign(tp_assign(\7, \7) tp_assign(\8, \8) tp_assign(\9, \9)),\n'\
 119 '       TP_printk()\n'\
 120 ')/g'\
 121         ${TMPFILE} >> ${HEADER}
 122
 123
 124 # types: 4 5  6  7
 125 # args   8 9 10 11
 126
 127 NRARGS=4
 128 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 129 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) '\
 130 'types: (\([^,]*\), \([^,]*\), \([^,]*\), \([^)]*\)) '\
 131 'args: (\([^,]*\), \([^,]*\), \([^,]*\), \([^)]*\))/'\
 132 'TRACE_EVENT(sys_\1,\n'\
 133 '       TP_PROTO(\4 \8, \5 \9, \6 \10, \7 \11),\n'\
 134 '       TP_ARGS(\8, \9, \10, \11),\n'\
 135 '       TP_STRUCT__entry(__field(\4, \8) __field(\5, \9) __field(\6, \10) __field(\7, \11)),\n'\
 136 '       TP_fast_assign(tp_assign(\8, \8) tp_assign(\9, \9) tp_assign(\10, \10) tp_assign(\11, \11)),\n'\
 137 '       TP_printk()\n'\
 138 ')/g'\
 139         ${TMPFILE} >> ${HEADER}
 140
 141 # types: 4  5  6  7  8
 142 # args   9 10 11 12 13
 143
 144 NRARGS=5
 145 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 146 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) '\
 147 'types: (\([^,]*\), \([^,]*\), \([^,]*\), \([^,]*\), \([^)]*\)) '\
 148 'args: (\([^,]*\), \([^,]*\), \([^,]*\), \([^,]*\), \([^)]*\))/'\
 149 'TRACE_EVENT(sys_\1,\n'\
 150 '       TP_PROTO(\4 \9, \5 \10, \6 \11, \7 \12, \8 \13),\n'\
 151 '       TP_ARGS(\9, \10, \11, \12, \13),\n'\
 152 '       TP_STRUCT__entry(__field(\4, \9) __field(\5, \10) __field(\6, \11) __field(\7, \12) __field(\8, \13)),\n'\
 153 '       TP_fast_assign(tp_assign(\9, \9) tp_assign(\10, \10) tp_assign(\11, \11) tp_assign(\12, \12) tp_assign(\13, \13)),\n'\
 154 '       TP_printk()\n'\
 155 ')/g'\
 156         ${TMPFILE} >> ${HEADER}
 157
 158
 159 # types: 4   5  6  7  8  9
 160 # args   10 11 12 13 14 15
 161
 162 NRARGS=6
 163 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 164 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) '\
 165 'types: (\([^,]*\), \([^,]*\), \([^,]*\), \([^,]*\), \([^,]*\), \([^)]*\)) '\
 166 'args: (\([^,]*\), \([^,]*\), \([^,]*\), \([^,]*\), \([^,]*\), \([^)]*\))/'\
 167 'TRACE_EVENT(sys_\1,\n'\
 168 '       TP_PROTO(\4 \10, \5 \11, \6 \12, \7 \13, \8 \14, \9 \15),\n'\
 169 '       TP_ARGS(\10, \11, \12, \13, \14, \15),\n'\
 170 '       TP_STRUCT__entry(__field(\4, \10) __field(\5, \11) __field(\6, \12) __field(\7, \13) __field(\8, \14) __field(\9, \15)),\n'\
 171 '       TP_fast_assign(tp_assign(\10, \10) tp_assign(\11, \11) tp_assign(\12, 12) tp_assign(\13, \13) tp_assign(\14, \14) tp_assign(\15, \15)),\n'\
 172 '       TP_printk()\n'\
 173 ')/g'\
 174         ${TMPFILE} >> ${HEADER}
 175
 176 # Macro for tracing syscall table
 177
 178 rm -f ${TMPFILE}
 179 for NRARGS in $(seq 0 6); do
 180         grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} >> ${TMPFILE}
 181 done
 182
 183 echo \
 184 "
 185 #endif /*  _TRACE_SYSCALLS_H */
 186
 187 /* This part must be outside protection */
 188 #include \"../../../probes/define_trace.h\"
 189
 190 #else /* CREATE_SYSCALL_TABLE */
 191 " >> ${HEADER}
 192
 193
 194 NRARGS=0
 195 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 196
 197 #noargs
 198 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) .*$/'\
 199 'TRACE_SYSCALL_TABLE(syscalls_noargs, sys_\1, \2, \3)/g'\
 200         ${TMPFILE} >> ${HEADER}
 201
 202 #others.
 203 grep -v "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 204 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) .*$/'\
 205 'TRACE_SYSCALL_TABLE(sys_\1, sys_\1, \2, \3)/g'\
 206         ${TMPFILE} >> ${HEADER}
 207
 208 echo -n \
 209 "
 210 #endif /* CREATE_SYSCALL_TABLE */
 211 " >> ${HEADER}
 212
 213 rm -f ${INPUTFILE}.tmp
 214 rm -f ${TMPFILE}
 215 rm -f ${SRCFILE}