3 # Generate system call probe description macros from syscall metadata dump file.
4 # The resulting header will be written in the headers subdirectory, in a file name
5 # based on the name of the input file.
9 # lttng-syscalls-generate-headers.sh <type> <input_dir> <input_filename_in_dir> <bitness>
10 # lttng-syscalls-generate-headers.sh integers 3.0.4 x86-64-syscalls-3.0.4 64
11 # lttng-syscalls-generate-headers.sh pointers 3.0.4 x86-64-syscalls-3.0.4 64
17 INPUT
=${INPUTDIR}/${INPUTFILE}
20 HEADER
=headers
/${INPUTFILE}_
${CLASS}.h
22 cp ${INPUT} ${SRCFILE}
25 perl
-p -e 's/^\[.*\] //g' ${SRCFILE} > ${TMPFILE}
26 mv ${TMPFILE} ${SRCFILE}
28 perl
-p -e 's/^syscall sys_([^ ]*)/syscall $1/g' ${SRCFILE} > ${TMPFILE}
29 mv ${TMPFILE} ${SRCFILE}
33 if [ "$CLASS" = integers
]; then
34 #select integers and no-args.
36 grep -v "\\*\|cap_user_header_t" ${SRCFILE} > ${TMPFILE}
37 mv ${TMPFILE} ${SRCFILE}
41 if [ "$CLASS" = pointers
]; then
42 #select system calls using pointers.
44 grep "\\*\|cap_#user_header_t" ${SRCFILE} > ${TMPFILE}
45 mv ${TMPFILE} ${SRCFILE}
48 echo "/* THIS FILE IS AUTO-GENERATED. DO NOT EDIT */" > ${HEADER}
51 "#ifndef CREATE_SYSCALL_TABLE
53 #if !defined(_TRACE_SYSCALLS_${CLASSCAP}_H) || defined(TRACE_HEADER_MULTI_READ)
54 #define _TRACE_SYSCALLS_${CLASSCAP}_H
56 #include <linux/tracepoint.h>
57 #include <linux/syscalls.h>
58 #include \"${INPUTFILE}_${CLASS}_override.h\"
59 #include \"syscalls_${CLASS}_override.h\"
62 if [ "$CLASS" = integers
]; then
67 'SC_DECLARE_EVENT_CLASS_NOARGS(syscalls_noargs,\n'\
68 ' TP_STRUCT__entry(),\n'\
69 ' TP_fast_assign(),\n'\
74 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
75 perl -p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) '\
76 'types: \(([^)]*)\) '\
78 '#ifndef OVERRIDE_'"${BITNESS}"'_sys_$1\n'\
79 'SC_DEFINE_EVENT_NOARGS(syscalls_noargs, sys_$1)\n'\
81 ${TMPFILE} >> ${HEADER}
90 grep "^syscall
[^
]* nr
[^
]* nbargs
${NRARGS} " ${SRCFILE} > ${TMPFILE}
91 perl
-p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) '\
92 'types: \(([^)]*)\) '\
94 '#ifndef OVERRIDE_'"${BITNESS}"'_sys_$1\n'\
95 'SC_TRACE_EVENT(sys_$1,\n'\
96 ' TP_PROTO($4 $5),\n'\
98 ' TP_STRUCT__entry(__field($4, $5)),\n'\
99 ' TP_fast_assign(tp_assign($4, $5, $5)),\n'\
103 ${TMPFILE} >> ${HEADER}
109 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
110 perl -p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) '\
111 'types: \(([^,]*), ([^)]*)\) '\
112 'args: \(([^,]*), ([^)]*)\)/'\
113 '#ifndef OVERRIDE_'"${BITNESS}"'_sys_$1\n'\
114 'SC_TRACE_EVENT(sys_$1,\n'\
115 ' TP_PROTO($4 $6, $5 $7),\n'\
116 ' TP_ARGS($6, $7),\n'\
117 ' TP_STRUCT__entry(__field($4, $6) __field($5, $7)),\n'\
118 ' TP_fast_assign(tp_assign($4, $6, $6) tp_assign($5, $7, $7)),\n'\
122 ${TMPFILE} >> ${HEADER}
128 grep "^syscall
[^
]* nr
[^
]* nbargs
${NRARGS} " ${SRCFILE} > ${TMPFILE}
129 perl
-p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) '\
130 'types: \(([^,]*), ([^,]*), ([^)]*)\) '\
131 'args: \(([^,]*), ([^,]*), ([^)]*)\)/'\
132 '#ifndef OVERRIDE_'"${BITNESS}"'_sys_$1\n'\
133 'SC_TRACE_EVENT(sys_$1,\n'\
134 ' TP_PROTO($4 $7, $5 $8, $6 $9),\n'\
135 ' TP_ARGS($7, $8, $9),\n'\
136 ' TP_STRUCT__entry(__field($4, $7) __field($5, $8) __field($6, $9)),\n'\
137 ' TP_fast_assign(tp_assign($4, $7, $7) tp_assign($5, $8, $8) tp_assign($6, $9, $9)),\n'\
141 ${TMPFILE} >> ${HEADER}
148 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
149 perl -p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) '\
150 'types: \(([^,]*), ([^,]*), ([^,]*), ([^)]*)\) '\
151 'args: \(([^,]*), ([^,]*), ([^,]*), ([^)]*)\)/'\
152 '#ifndef OVERRIDE_'"${BITNESS}"'_sys_$1\n'\
153 'SC_TRACE_EVENT(sys_$1,\n'\
154 ' TP_PROTO($4 $8, $5 $9, $6 $10, $7 $11),\n'\
155 ' TP_ARGS($8, $9, $10, $11),\n'\
156 ' TP_STRUCT__entry(__field($4, $8) __field($5, $9) __field($6, $10) __field($7, $11)),\n'\
157 ' TP_fast_assign(tp_assign($4, $8, $8) tp_assign($5, $9, $9) tp_assign($6, $10, $10) tp_assign($7, $11, $11)),\n'\
161 ${TMPFILE} >> ${HEADER}
167 grep "^syscall
[^
]* nr
[^
]* nbargs
${NRARGS} " ${SRCFILE} > ${TMPFILE}
168 perl
-p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) '\
169 'types: \(([^,]*), ([^,]*), ([^,]*), ([^,]*), ([^)]*)\) '\
170 'args: \(([^,]*), ([^,]*), ([^,]*), ([^,]*), ([^)]*)\)/'\
171 '#ifndef OVERRIDE_'"${BITNESS}"'_sys_$1\n'\
172 'SC_TRACE_EVENT(sys_$1,\n'\
173 ' TP_PROTO($4 $9, $5 $10, $6 $11, $7 $12, $8 $13),\n'\
174 ' TP_ARGS($9, $10, $11, $12, $13),\n'\
175 ' TP_STRUCT__entry(__field($4, $9) __field($5, $10) __field($6, $11) __field($7, $12) __field($8, $13)),\n'\
176 ' TP_fast_assign(tp_assign($4, $9, $9) tp_assign($5, $10, $10) tp_assign($6, $11, $11) tp_assign($7, $12, $12) tp_assign($8, $13, $13)),\n'\
180 ${TMPFILE} >> ${HEADER}
184 # args 10 11 12 13 14 15
187 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
188 perl -p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) '\
189 'types: \(([^,]*), ([^,]*), ([^,]*), ([^,]*), ([^,]*), ([^\)]*)\) '\
190 'args: \(([^,]*), ([^,]*), ([^,]*), ([^,]*), ([^,]*), ([^\)]*)\)/'\
191 '#ifndef OVERRIDE_'"${BITNESS}"'_sys_$1\n'\
192 'SC_TRACE_EVENT(sys_$1,\n'\
193 ' TP_PROTO($4 $10, $5 $11, $6 $12, $7 $13, $8 $14, $9 $15),\n'\
194 ' TP_ARGS($10, $11, $12, $13, $14, $15),\n'\
195 ' TP_STRUCT__entry(__field($4, $10) __field($5, $11) __field($6, $12) __field($7, $13) __field($8, $14) __field($9, $15)),\n'\
196 ' TP_fast_assign(tp_assign($4, $10, $10) tp_assign($5, $11, $11) tp_assign($6, $12, $12) tp_assign($7, $13, $13) tp_assign($8, $14, $14) tp_assign($9, $15, $15)),\n'\
200 ${TMPFILE} >> ${HEADER}
202 # Macro for tracing syscall table
205 for NRARGS in $(seq 0 6); do
206 grep "^syscall
[^
]* nr
[^
]* nbargs
${NRARGS} " ${SRCFILE} >> ${TMPFILE}
211 #endif /* _TRACE_SYSCALLS_${CLASSCAP}_H */
213 /* This part must be outside protection */
214 #include \"../../../probes/define_trace.h\"
216 #else /* CREATE_SYSCALL_TABLE */
218 #include \"${INPUTFILE}_${CLASS}_override.h\"
219 #include \"syscalls_${CLASS}_override.h\"
224 if [ "$CLASS" = integers
]; then
226 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
227 perl -p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) .*$/'\
228 '#ifndef OVERRIDE_TABLE_'"${BITNESS}"'_sys_$1\n'\
229 'TRACE_SYSCALL_TABLE\(syscalls_noargs, sys_$1, $2, $3\)\n'\
231 ${TMPFILE} >> ${HEADER}
235 grep -v "^syscall
[^
]* nr
[^
]* nbargs
${NRARGS} " ${SRCFILE} > ${TMPFILE}
236 perl
-p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) .*$/'\
237 '#ifndef OVERRIDE_TABLE_'"${BITNESS}"'_sys_$1\n'\
238 'TRACE_SYSCALL_TABLE(sys_$1, sys_$1, $2, $3)\n'\
240 ${TMPFILE} >> ${HEADER}
244 #endif /* CREATE_SYSCALL_TABLE */
247 #fields names: ...char * type with *name* or *file* or *path* or *root*
248 # or *put_old* or *type*
249 cp -f ${HEADER} ${TMPFILE}
251 perl
-p -e 's/__field\(([^,)]*char \*), ([^\)]*)(name|file|path|root|put_old|type)([^\)]*)\)/__string_from_user($2$3$4, $2$3$4)/g'\
252 ${TMPFILE} >> ${HEADER}
253 cp -f ${HEADER} ${TMPFILE}
255 perl
-p -e 's/tp_assign\(([^,)]*char \*), ([^,]*)(name|file|path|root|put_old|type)([^,]*), ([^\)]*)\)/tp_copy_string_from_user($2$3$4, $5)/g'\
256 ${TMPFILE} >> ${HEADER}
258 #prettify addresses heuristics.
259 #field names with addr or ptr
260 cp -f ${HEADER} ${TMPFILE}
262 perl
-p -e 's/__field\(([^,)]*), ([^,)]*addr|[^,)]*ptr)([^),]*)\)/__field_hex($1, $2$3)/g'\
263 ${TMPFILE} >> ${HEADER}
265 #field types ending with '*'
266 cp -f ${HEADER} ${TMPFILE}
268 perl
-p -e 's/__field\(([^,)]*\*), ([^),]*)\)/__field_hex($1, $2)/g'\
269 ${TMPFILE} >> ${HEADER}
271 #strip the extra type information from tp_assign.
272 cp -f ${HEADER} ${TMPFILE}
274 perl
-p -e 's/tp_assign\(([^,)]*), ([^,]*), ([^\)]*)\)/tp_assign($2, $3)/g'\
275 ${TMPFILE} >> ${HEADER}
277 rm -f ${INPUTFILE}.tmp
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