Allow trace syscall table override

[lttng-modules.git] / instrumentation / syscalls / lttng-syscalls-generate-headers.sh

diff --git a/instrumentation/syscalls/lttng-syscalls-generate-headers.sh b/instrumentation/syscalls/lttng-syscalls-generate-headers.sh
index c68f2e146460e4cf7d0774e654b5ec2ab879695a..b98a5e1031a31b6aa6b188df6b30b834ed2e1d16 100644 (file)
--- a/instrumentation/syscalls/lttng-syscalls-generate-headers.sh
+++ b/instrumentation/syscalls/lttng-syscalls-generate-headers.sh
@@ -53,6 +53,7 @@ echo \
 
 #include <linux/tracepoint.h>
 #include <linux/syscalls.h>
+#include \"${INPUTFILE}_${CLASS}_override.h\"
 " >> ${HEADER}
 
 if [ "$CLASS" = integers ]; then
@@ -71,8 +72,9 @@ grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 perl -p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) '\
 'types: \(([^)]*)\) '\
 'args: \(([^)]*)\)/'\
-'DEFINE_EVENT_NOARGS(syscalls_noargs, sys_$1)'\
-'/g'\
+'#ifndef OVERRIDE_sys_$1\n'\
+'DEFINE_EVENT_NOARGS(syscalls_noargs, sys_$1)\n'\
+'#endif/g'\
        ${TMPFILE} >> ${HEADER}
 
 fi
@@ -86,13 +88,15 @@ grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 perl -p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) '\
 'types: \(([^)]*)\) '\
 'args: \(([^)]*)\)/'\
+'#ifndef OVERRIDE_sys_$1\n'\
 'TRACE_EVENT(sys_$1,\n'\
 '      TP_PROTO($4 $5),\n'\
 '      TP_ARGS($5),\n'\
 '      TP_STRUCT__entry(__field($4, $5)),\n'\
 '      TP_fast_assign(tp_assign($5, $5)),\n'\
 '      TP_printk()\n'\
-')/g'\
+')\n'\
+'#endif/g'\
        ${TMPFILE} >> ${HEADER}
 
 # types: 4 5
@@ -103,13 +107,15 @@ grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 perl -p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) '\
 'types: \(([^,]*), ([^)]*)\) '\
 'args: \(([^,]*), ([^)]*)\)/'\
+'#ifndef OVERRIDE_sys_$1\n'\
 'TRACE_EVENT(sys_$1,\n'\
 '      TP_PROTO($4 $6, $5 $7),\n'\
 '      TP_ARGS($6, $7),\n'\
 '      TP_STRUCT__entry(__field($4, $6) __field($5, $7)),\n'\
 '      TP_fast_assign(tp_assign($6, $6) tp_assign($7, $7)),\n'\
 '      TP_printk()\n'\
-')/g'\
+')\n'\
+'#endif/g'\
        ${TMPFILE} >> ${HEADER}
 
 # types: 4 5 6
@@ -120,13 +126,15 @@ grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 perl -p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) '\
 'types: \(([^,]*), ([^,]*), ([^)]*)\) '\
 'args: \(([^,]*), ([^,]*), ([^)]*)\)/'\
+'#ifndef OVERRIDE_sys_$1\n'\
 'TRACE_EVENT(sys_$1,\n'\
 '      TP_PROTO($4 $7, $5 $8, $6 $9),\n'\
 '      TP_ARGS($7, $8, $9),\n'\
 '      TP_STRUCT__entry(__field($4, $7) __field($5, $8) __field($6, $9)),\n'\
 '      TP_fast_assign(tp_assign($7, $7) tp_assign($8, $8) tp_assign($9, $9)),\n'\
 '      TP_printk()\n'\
-')/g'\
+')\n'\
+'#endif/g'\
        ${TMPFILE} >> ${HEADER}
 
 
@@ -138,13 +146,15 @@ grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 perl -p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) '\
 'types: \(([^,]*), ([^,]*), ([^,]*), ([^)]*)\) '\
 'args: \(([^,]*), ([^,]*), ([^,]*), ([^)]*)\)/'\
+'#ifndef OVERRIDE_sys_$1\n'\
 'TRACE_EVENT(sys_$1,\n'\
 '      TP_PROTO($4 $8, $5 $9, $6 $10, $7 $11),\n'\
 '      TP_ARGS($8, $9, $10, $11),\n'\
 '      TP_STRUCT__entry(__field($4, $8) __field($5, $9) __field($6, $10) __field($7, $11)),\n'\
 '      TP_fast_assign(tp_assign($8, $8) tp_assign($9, $9) tp_assign($10, $10) tp_assign($11, $11)),\n'\
 '      TP_printk()\n'\
-')/g'\
+')\n'\
+'#endif/g'\
        ${TMPFILE} >> ${HEADER}
 
 # types: 4  5  6  7  8
@@ -155,13 +165,15 @@ grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 perl -p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) '\
 'types: \(([^,]*), ([^,]*), ([^,]*), ([^,]*), ([^)]*)\) '\
 'args: \(([^,]*), ([^,]*), ([^,]*), ([^,]*), ([^)]*)\)/'\
+'#ifndef OVERRIDE_sys_$1\n'\
 'TRACE_EVENT(sys_$1,\n'\
 '      TP_PROTO($4 $9, $5 $10, $6 $11, $7 $12, $8 $13),\n'\
 '      TP_ARGS($9, $10, $11, $12, $13),\n'\
 '      TP_STRUCT__entry(__field($4, $9) __field($5, $10) __field($6, $11) __field($7, $12) __field($8, $13)),\n'\
 '      TP_fast_assign(tp_assign($9, $9) tp_assign($10, $10) tp_assign($11, $11) tp_assign($12, $12) tp_assign($13, $13)),\n'\
 '      TP_printk()\n'\
-')/g'\
+')\n'\
+'#endif/g'\
        ${TMPFILE} >> ${HEADER}
 
 
@@ -173,13 +185,15 @@ grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 perl -p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) '\
 'types: \(([^,]*), ([^,]*), ([^,]*), ([^,]*), ([^,]*), ([^\)]*)\) '\
 'args: \(([^,]*), ([^,]*), ([^,]*), ([^,]*), ([^,]*), ([^\)]*)\)/'\
+'#ifndef OVERRIDE_sys_$1\n'\
 'TRACE_EVENT(sys_$1,\n'\
 '      TP_PROTO($4 $10, $5 $11, $6 $12, $7 $13, $8 $14, $9 $15),\n'\
 '      TP_ARGS($10, $11, $12, $13, $14, $15),\n'\
 '      TP_STRUCT__entry(__field($4, $10) __field($5, $11) __field($6, $12) __field($7, $13) __field($8, $14) __field($9, $15)),\n'\
 '      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'\
 '      TP_printk()\n'\
-')/g'\
+')\n'\
+'#endif/g'\
        ${TMPFILE} >> ${HEADER}
 
 # Macro for tracing syscall table
@@ -197,8 +211,9 @@ echo \
 #include \"../../../probes/define_trace.h\"
 
 #else /* CREATE_SYSCALL_TABLE */
-" >> ${HEADER}
 
+#include \"${INPUTFILE}_${CLASS}_override.h\"
+" >> ${HEADER}
 
 NRARGS=0
 
@@ -206,14 +221,18 @@ if [ "$CLASS" = integers ]; then
 #noargs
 grep "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 perl -p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) .*$/'\
-'TRACE_SYSCALL_TABLE\(syscalls_noargs, sys_$1, $2, $3\)/g'\
+'#ifndef OVERRIDE_sys_$1\n'\
+'TRACE_SYSCALL_TABLE\(syscalls_noargs, sys_$1, $2, $3\)\n'\
+'#endif/g'\
        ${TMPFILE} >> ${HEADER}
 fi
 
 #others.
 grep -v "^syscall [^ ]* nr [^ ]* nbargs ${NRARGS} " ${SRCFILE} > ${TMPFILE}
 perl -p -e 's/^syscall ([^ ]*) nr ([^ ]*) nbargs ([^ ]*) .*$/'\
-'TRACE_SYSCALL_TABLE(sys_$1, sys_$1, $2, $3)/g'\
+'#ifndef OVERRIDE_sys_$1\n'\
+'TRACE_SYSCALL_TABLE(sys_$1, sys_$1, $2, $3)\n'\
+'#endif/g'\
        ${TMPFILE} >> ${HEADER}
 
 echo -n \
@@ -221,6 +240,21 @@ echo -n \
 #endif /* CREATE_SYSCALL_TABLE */
 " >> ${HEADER}
 
+#prettify addresses heuristics.
+cp -f ${HEADER} ${TMPFILE}
+rm -f ${HEADER}
+
+#field names with addr or ptr
+perl -p -e 's/__field\(([^,)]*), ([^a,)]*addr|[^p,)]*ptr)([^),]*)\)/__field_hex($1, $2$3)/g'\
+       ${TMPFILE} >> ${HEADER}
+
+cp -f ${HEADER} ${TMPFILE}
+rm -f ${HEADER}
+
+#field types ending with '*'
+perl -p -e 's/__field\(([^,)]*\*), ([^),]*)\)/__field_hex($1, $2)/g'\
+       ${TMPFILE} >> ${HEADER}
+
 rm -f ${INPUTFILE}.tmp
 rm -f ${TMPFILE}
 rm -f ${SRCFILE}