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 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 #TODO
  37 #move those without arguments to a separate file.
  38 #CLASS=noargs
  39 #grep "^syscall [^ ]* nr [^ ]* nbargs 0 " ${SRCFILE} > ${TMPFILE}
  40 #mv ${TMPFILE} ${SRCFILE}
  41
  42 HEADER=headers/${INPUTFILE}-${CLASS}.h
  43
  44 echo "/* THIS FILE IS AUTO-GENERATED. DO NOT EDIT */" > ${HEADER}
  45
  46 echo \
  47 "#ifndef CREATE_SYSCALL_TABLE
  48
  49 #undef TRACE_SYSTEM
  50 #define TRACE_SYSTEM syscalls
  51
  52 #if !defined(_TRACE_SYSCALLS_H) || defined(TRACE_HEADER_MULTI_READ)
  53 #define _TRACE_SYSCALLS_H
  54
  55 #include <linux/tracepoint.h>
  56 #include <linux/syscalls.h>
  57 " >> ${HEADER}
  58
  59 #TODO 0
  60
  61 # types: 4
  62 # args   5
  63
  64 NRARGS=1
  65 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
  66 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) '\
  67 'types: (\([^)]*\)) '\
  68 'args: (\([^)]*\))/'\
  69 'TRACE_EVENT(sys_\1,\n'\
  70 '       TP_PROTO(\4 \5),\n'\
  71 '       TP_ARGS(\5),\n'\
  72 '       TP_STRUCT__entry(__field(\4, \5)),\n'\
  73 '       TP_fast_assign(tp_assign(\5, \5)),\n'\
  74 '       TP_printk()\n'\
  75 ')/g'\
  76         ${TMPFILE} >> ${HEADER}
  77
  78 # types: 4 5
  79 # args   6 7
  80
  81 NRARGS=2
  82 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
  83 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) '\
  84 'types: (\([^,]*\), \([^)]*\)) '\
  85 'args: (\([^,]*\), \([^)]*\))/'\
  86 'TRACE_EVENT(sys_\1,\n'\
  87 '       TP_PROTO(\4 \6, \5 \7),\n'\
  88 '       TP_ARGS(\6, \7),\n'\
  89 '       TP_STRUCT__entry(__field(\4, \6) __field(\5, \7)),\n'\
  90 '       TP_fast_assign(tp_assign(\6, \6) tp_assign(\7, \7)),\n'\
  91 '       TP_printk()\n'\
  92 ')/g'\
  93         ${TMPFILE} >> ${HEADER}
  94
  95 # types: 4 5 6
  96 # args   7 8 9
  97
  98 NRARGS=3
  99 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 100 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) '\
 101 'types: (\([^,]*\), \([^,]*\), \([^)]*\)) '\
 102 'args: (\([^,]*\), \([^,]*\), \([^)]*\))/'\
 103 'TRACE_EVENT(sys_\1,\n'\
 104 '       TP_PROTO(\4 \7, \5 \8, \6 \9),\n'\
 105 '       TP_ARGS(\7, \8, \9),\n'\
 106 '       TP_STRUCT__entry(__field(\4, \7) __field(\5, \8) __field(\6, \9)),\n'\
 107 '       TP_fast_assign(tp_assign(\7, \7) tp_assign(\8, \8) tp_assign(\9, \9)),\n'\
 108 '       TP_printk()\n'\
 109 ')/g'\
 110         ${TMPFILE} >> ${HEADER}
 111
 112
 113 # types: 4 5  6  7
 114 # args   8 9 10 11
 115
 116 NRARGS=4
 117 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 118 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) '\
 119 'types: (\([^,]*\), \([^,]*\), \([^,]*\), \([^)]*\)) '\
 120 'args: (\([^,]*\), \([^,]*\), \([^,]*\), \([^)]*\))/'\
 121 'TRACE_EVENT(sys_\1,\n'\
 122 '       TP_PROTO(\4 \8, \5 \9, \6 \10, \7 \11),\n'\
 123 '       TP_ARGS(\8, \9, \10, \11),\n'\
 124 '       TP_STRUCT__entry(__field(\4, \8) __field(\5, \9) __field(\6, \10) __field(\7, \11)),\n'\
 125 '       TP_fast_assign(tp_assign(\8, \8) tp_assign(\9, \9) tp_assign(\10, \10) tp_assign(\11, \11)),\n'\
 126 '       TP_printk()\n'\
 127 ')/g'\
 128         ${TMPFILE} >> ${HEADER}
 129
 130 # types: 4  5  6  7  8
 131 # args   9 10 11 12 13
 132
 133 NRARGS=5
 134 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 135 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) '\
 136 'types: (\([^,]*\), \([^,]*\), \([^,]*\), \([^,]*\), \([^)]*\)) '\
 137 'args: (\([^,]*\), \([^,]*\), \([^,]*\), \([^,]*\), \([^)]*\))/'\
 138 'TRACE_EVENT(sys_\1,\n'\
 139 '       TP_PROTO(\4 \9, \5 \10, \6 \11, \7 \12, \8 \13),\n'\
 140 '       TP_ARGS(\9, \10, \11, \12, \13),\n'\
 141 '       TP_STRUCT__entry(__field(\4, \9) __field(\5, \10) __field(\6, \11) __field(\7, \12) __field(\8, \13)),\n'\
 142 '       TP_fast_assign(tp_assign(\9, \9) tp_assign(\10, \10) tp_assign(\11, \11) tp_assign(\12, \12) tp_assign(\13, \13)),\n'\
 143 '       TP_printk()\n'\
 144 ')/g'\
 145         ${TMPFILE} >> ${HEADER}
 146
 147
 148 # types: 4   5  6  7  8  9
 149 # args   10 11 12 13 14 15
 150
 151 NRARGS=6
 152 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 153 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) '\
 154 'types: (\([^,]*\), \([^,]*\), \([^,]*\), \([^,]*\), \([^,]*\), \([^)]*\)) '\
 155 'args: (\([^,]*\), \([^,]*\), \([^,]*\), \([^,]*\), \([^,]*\), \([^)]*\))/'\
 156 'TRACE_EVENT(sys_\1,\n'\
 157 '       TP_PROTO(\4 \10, \5 \11, \6 \12, \7 \13, \8 \14, \9 \15),\n'\
 158 '       TP_ARGS(\10, \11, \12, \13, \14, \15),\n'\
 159 '       TP_STRUCT__entry(__field(\4, \10) __field(\5, \11) __field(\6, \12) __field(\7, \13) __field(\8, \14) __field(\9, \15)),\n'\
 160 '       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'\
 161 '       TP_printk()\n'\
 162 ')/g'\
 163         ${TMPFILE} >> ${HEADER}
 164
 165 # Macro for tracing syscall table
 166
 167 rm -f ${TMPFILE}
 168 for NRARGS in $(seq 1 6); do
 169         grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} >> ${TMPFILE}
 170 done
 171
 172 echo \
 173 "
 174 #endif /*  _TRACE_SYSCALLS_H */
 175
 176 /* This part must be outside protection */
 177 #include \"../../../probes/define_trace.h\"
 178
 179 #else /* CREATE_SYSCALL_TABLE */
 180 " >> ${HEADER}
 181
 182 sed 's/^syscall \([^ ]*\) nr \([^ ]*\) nbargs \([^ ]*\) .*$/'\
 183 'TRACE_SYSCALL_TABLE(sys_\1, \2, \3)/g'\
 184         ${TMPFILE} >> ${HEADER}
 185
 186 echo -n \
 187 "
 188 #endif /* CREATE_SYSCALL_TABLE */
 189 " >> ${HEADER}
 190
 191 rm -f ${INPUTFILE}.tmp
 192 rm -f ${TMPFILE}
 193 rm -f ${SRCFILE}