[PATCH 6/6] devtools: add trace function check in checkpatch

[Ankur Dwivedi <adwivedi@marvell.com>]

This patch adds a check in checkpatch tool, to check if trace
function is added in any new function added in ethdev library.

It uses the existing build_map_changes() function and version.map
file to create a list of newly added functions. The definition of
these functions are checked if they contain trace calls or not.
The checkpatch return error if the trace calls are not present.

Cc: tduszynski@marvell.com

Signed-off-by: Ankur Dwivedi <adwivedi@marvell.com>
---
 devtools/check-symbol-change.sh | 76 +-------------------------------
 devtools/check-trace-func.py    | 52 ++++++++++++++++++++++
 devtools/check-trace-func.sh    | 50 +++++++++++++++++++++
 devtools/checkpatches.sh        |  9 ++++
 devtools/common-func.sh         | 77 +++++++++++++++++++++++++++++++++
 5 files changed, 190 insertions(+), 74 deletions(-)
 create mode 100755 devtools/check-trace-func.py
 create mode 100755 devtools/check-trace-func.sh
 create mode 100644 devtools/common-func.sh

diff --git a/devtools/check-symbol-change.sh b/devtools/check-symbol-change.sh
index 8992214ac8..4bdd0d727a 100755
--- a/devtools/check-symbol-change.sh
+++ b/devtools/check-symbol-change.sh
@@ -2,80 +2,8 @@
 # SPDX-License-Identifier: BSD-3-Clause
 # Copyright(c) 2018 Neil Horman <nhorman@tuxdriver.com>
 
-build_map_changes()
-{
-	local fname="$1"
-	local mapdb="$2"
-
-	cat "$fname" | awk '
-		# Initialize our variables
-		BEGIN {map="";sym="";ar="";sec=""; in_sec=0; in_map=0}
-
-		# Anything that starts with + or -, followed by an a
-		# and ends in the string .map is the name of our map file
-		# This may appear multiple times in a patch if multiple
-		# map files are altered, and all section/symbol names
-		# appearing between a triggering of this rule and the
-		# next trigger of this rule are associated with this file
-		/[-+] [ab]\/.*\.map/ {map=$2; in_map=1; next}
-
-		# The previous rule catches all .map files, anything else
-		# indicates we left the map chunk.
-		/[-+] [ab]\// {in_map=0}
-
-		# Triggering this rule, which starts a line and ends it
-		# with a { identifies a versioned section.  The section name is
-		# the rest of the line with the + and { symbols removed.
-		# Triggering this rule sets in_sec to 1, which actives the
-		# symbol rule below
-		/^.*{/ {
-			gsub("+", "");
-			if (in_map == 1) {
-				sec=$(NF-1); in_sec=1;
-			}
-		}
-
-		# This rule identifies the end of a section, and disables the
-		# symbol rule
-		/.*}/ {in_sec=0}
-
-		# This rule matches on a + followed by any characters except a :
-		# (which denotes a global vs local segment), and ends with a ;.
-		# The semicolon is removed and the symbol is printed with its
-		# association file name and version section, along with an
-		# indicator that the symbol is a new addition.  Note this rule
-		# only works if we have found a version section in the rule
-		# above (hence the in_sec check) And found a map file (the
-		# in_map check).  If we are not in a map chunk, do nothing.  If
-		# we are in a map chunk but not a section chunk, record it as
-		# unknown.
-		/^+[^}].*[^:*];/ {gsub(";","");sym=$2;
-			if (in_map == 1) {
-				if (in_sec == 1) {
-					print map " " sym " " sec " add"
-				} else {
-					print map " " sym " unknown add"
-				}
-			}
-		}
-
-		# This is the same rule as above, but the rule matches on a
-		# leading - rather than a +, denoting that the symbol is being
-		# removed.
-		/^-[^}].*[^:*];/ {gsub(";","");sym=$2;
-			if (in_map == 1) {
-				if (in_sec == 1) {
-					print map " " sym " " sec " del"
-				} else {
-					print map " " sym " unknown del"
-				}
-			}
-		}' > "$mapdb"
-
-		sort -u "$mapdb" > "$mapdb.2"
-		mv -f "$mapdb.2" "$mapdb"
-
-}
+selfdir=$(dirname $(readlink -f $0))
+. $selfdir/common-func.sh
 
 is_stable_section() {
 	[ "$1" != 'EXPERIMENTAL' ] && [ "$1" != 'INTERNAL' ]
diff --git a/devtools/check-trace-func.py b/devtools/check-trace-func.py
new file mode 100755
index 0000000000..d38d8616cd
--- /dev/null
+++ b/devtools/check-trace-func.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (C) 2022 Marvell.
+
+import sys
+
+patch = sys.argv[1]
+fn = sys.argv[2]
+
+with open(patch, 'r') as fr:
+	fstr = fr.read()
+
+def find_fn_def():
+	found = 0
+	tmp = 0
+	idx = 0
+	while found == 0:
+		idx = fstr.find("+"+fn+"(", idx)
+		if (idx != -1):
+			tmp = fstr.find(')', idx)
+			if (fstr[tmp + 1] == ';'):
+				idx = tmp
+				continue
+			else:
+				found = 1
+		else:
+			break
+	return idx
+
+def find_trace(index):
+	fp = fstr.find("{", index)
+	sp = fstr.find("}", fp)
+	fd = fstr[fp:sp]
+
+	i = fd.find("_trace_")
+	if (i != -1):
+		return 0
+	else:
+		return 1
+
+
+def __main():
+	ret=0
+	index = find_fn_def()
+	if (index != -1):
+		# If function definition is present,
+		# check if trace call is present
+		ret = find_trace(index)
+	return ret
+
+if __name__ == "__main__":
+	sys.exit(__main())
diff --git a/devtools/check-trace-func.sh b/devtools/check-trace-func.sh
new file mode 100755
index 0000000000..777b9a03e0
--- /dev/null
+++ b/devtools/check-trace-func.sh
@@ -0,0 +1,50 @@
+#!/bin/sh
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (C) 2022 Marvell.
+
+selfdir=$(dirname $(readlink -f $0))
+. $selfdir/common-func.sh
+
+libdir="ethdev"
+check_for_trace_call()
+{
+	mapdb="$2"
+	ret=0
+
+	while read -r mname symname secname ar; do
+		libp=0
+		libname=$(echo $mname | awk 'BEGIN {FS="/"};{print $3}')
+
+		for i in $libdir; do
+			if [ $i = $libname ]; then
+				libp=1
+				break
+			fi
+		done
+
+		if [ $libp -eq 1 ] && [ "$ar" = "add" ]; then
+			if [ "$secname" = "EXPERIMENTAL" ]; then
+				# Check if new API is added with trace function call
+				if ! devtools/check-trace-func.py $1 $symname; then
+					ret=1
+					echo -n "ERROR: Function $symname "
+					echo "is added without trace call"
+				fi
+			fi
+		fi
+	done < "$mapdb"
+
+	return $ret
+}
+
+clean_and_exit_on_sig()
+{
+	rm -rf "$mapfile"
+}
+
+trap clean_and_exit_on_sig EXIT
+
+mapfile=$(mktemp -t dpdk.mapdb.XXXXXX)
+
+build_map_changes "$1" "$mapfile"
+check_for_trace_call "$1" "$mapfile"
diff --git a/devtools/checkpatches.sh b/devtools/checkpatches.sh
index 1edc5810ad..35c47b3e85 100755
--- a/devtools/checkpatches.sh
+++ b/devtools/checkpatches.sh
@@ -10,6 +10,7 @@
 . $(dirname $(readlink -f $0))/load-devel-config
 
 VALIDATE_NEW_API=$(dirname $(readlink -f $0))/check-symbol-change.sh
+VALIDATE_TRACE_FUNC=$(dirname $(readlink -f $0))/check-trace-func.sh
 
 # Enable codespell by default. This can be overwritten from a config file.
 # Codespell can also be enabled by setting DPDK_CHECKPATCH_CODESPELL to a valid path
@@ -338,6 +339,14 @@ check () { # <patch> <commit> <title>
 		ret=1
 	fi
 
+	! $verbose || printf '\nChecking API additions with trace function call :\n'
+	report=$($VALIDATE_TRACE_FUNC "$tmpinput")
+	if [ $? -ne 0 ] ; then
+		$headline_printed || print_headline "$3"
+		printf '%s\n' "$report"
+		ret=1
+	fi
+
 	if [ "$tmpinput" != "$1" ]; then
 		rm -f "$tmpinput"
 		trap - INT
diff --git a/devtools/common-func.sh b/devtools/common-func.sh
new file mode 100644
index 0000000000..c88e949890
--- /dev/null
+++ b/devtools/common-func.sh
@@ -0,0 +1,77 @@
+#!/bin/sh
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2018 Neil Horman <nhorman@tuxdriver.com>
+
+build_map_changes()
+{
+	local fname="$1"
+	local mapdb="$2"
+
+	cat "$fname" | awk '
+		# Initialize our variables
+		BEGIN {map="";sym="";ar="";sec=""; in_sec=0; in_map=0}
+
+		# Anything that starts with + or -, followed by an a
+		# and ends in the string .map is the name of our map file
+		# This may appear multiple times in a patch if multiple
+		# map files are altered, and all section/symbol names
+		# appearing between a triggering of this rule and the
+		# next trigger of this rule are associated with this file
+		/[-+] [ab]\/.*\.map/ {map=$2; in_map=1; next}
+
+		# The previous rule catches all .map files, anything else
+		# indicates we left the map chunk.
+		/[-+] [ab]\// {in_map=0}
+
+		# Triggering this rule, which starts a line and ends it
+		# with a { identifies a versioned section.  The section name is
+		# the rest of the line with the + and { symbols removed.
+		# Triggering this rule sets in_sec to 1, which actives the
+		# symbol rule below
+		/^.*{/ {
+			gsub("+", "");
+			if (in_map == 1) {
+				sec=$(NF-1); in_sec=1;
+			}
+		}
+
+		# This rule identifies the end of a section, and disables the
+		# symbol rule
+		/.*}/ {in_sec=0}
+
+		# This rule matches on a + followed by any characters except a :
+		# (which denotes a global vs local segment), and ends with a ;.
+		# The semicolon is removed and the symbol is printed with its
+		# association file name and version section, along with an
+		# indicator that the symbol is a new addition.  Note this rule
+		# only works if we have found a version section in the rule
+		# above (hence the in_sec check) And found a map file (the
+		# in_map check).  If we are not in a map chunk, do nothing.  If
+		# we are in a map chunk but not a section chunk, record it as
+		# unknown.
+		/^+[^}].*[^:*];/ {gsub(";","");sym=$2;
+			if (in_map == 1) {
+				if (in_sec == 1) {
+					print map " " sym " " sec " add"
+				} else {
+					print map " " sym " unknown add"
+				}
+			}
+		}
+
+		# This is the same rule as above, but the rule matches on a
+		# leading - rather than a +, denoting that the symbol is being
+		# removed.
+		/^-[^}].*[^:*];/ {gsub(";","");sym=$2;
+			if (in_map == 1) {
+				if (in_sec == 1) {
+					print map " " sym " " sec " del"
+				} else {
+					print map " " sym " unknown del"
+				}
+			}
+		}' > "$mapdb"
+
+		sort -u "$mapdb" > "$mapdb.2"
+		mv -f "$mapdb.2" "$mapdb"
+}
-- 
2.28.0