[dpdk-dev] [PATCH v5] devtools: script to track map symbols

[Ray Kinsella <mdr@ashroe.eu>]

Script to track growth of stable and experimental symbols
over releases since v19.11.

Signed-off-by: Ray Kinsella <mdr@ashroe.eu>
---
v2: reworked to fix pylint errors
v3: sent with the correct in-reply-to
v4: fix typos picked up by the CI
v5: fix terminal_size & directory args

 devtools/count_symbols.py | 262 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 262 insertions(+)
 create mode 100755 devtools/count_symbols.py

diff --git a/devtools/count_symbols.py b/devtools/count_symbols.py
new file mode 100755
index 0000000000..96990f609f
--- /dev/null
+++ b/devtools/count_symbols.py
@@ -0,0 +1,262 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2021 Intel Corporation
+'''Tool to count the number of symbols in each DPDK release'''
+from pathlib import Path
+import sys
+import os
+import subprocess
+import argparse
+import re
+import datetime
+
+try:
+    from parsley import makeGrammar
+except ImportError:
+    print('This script uses the package Parsley to parse C Mapfiles.\n'
+          'This can be installed with \"pip install parsley".')
+    sys.exit()
+
+MAP_GRAMMAR = r"""
+
+ws = (' ' | '\r' | '\n' | '\t')*
+
+ABI_VER = ({})
+DPDK_VER = ('DPDK_' ABI_VER)
+ABI_NAME = ('INTERNAL' | 'EXPERIMENTAL' | DPDK_VER)
+comment = '#' (~'\n' anything)+ '\n'
+symbol = (~(';' | '}}' | '#') anything )+:c ';' -> ''.join(c)
+global = 'global:'
+local = 'local: *;'
+symbols = comment* symbol:s ws comment* -> s
+
+abi = (abi_section+):m -> dict(m)
+abi_section = (ws ABI_NAME:e ws '{{' ws global* (~local ws symbols)*:s ws local* ws '}}' ws DPDK_VER* ';' ws) -> (e,s)
+"""
+
+def get_abi_versions():
+    '''Returns a string of possible dpdk abi versions'''
+
+    year = datetime.date.today().year - 2000
+    tags = " |".join(['\'{}\''.format(i) \
+                     for i in reversed(range(21, year + 1)) ])
+    tags  = tags + ' | \'20.0.1\' | \'20.0\' | \'20\''
+
+    return tags
+
+def get_dpdk_releases():
+    '''Returns a list of dpdk release tags names  since v19.11'''
+
+    year = datetime.date.today().year - 2000
+    year_range = "|".join("{}".format(i) for i in range(19,year + 1))
+    pattern = re.compile(r'^\"v(' +  year_range + r')\.\d{2}\"$')
+
+    cmd = ['git', 'for-each-ref', '--sort=taggerdate', '--format', '"%(tag)"']
+    try:
+        result = subprocess.run(cmd, \
+                                stdout=subprocess.PIPE, \
+                                stderr=subprocess.PIPE,
+                                check=True)
+    except subprocess.CalledProcessError:
+        print("Failed to interogate git for release tags")
+        sys.exit()
+
+
+    tags = result.stdout.decode('utf-8').split('\n')
+
+    # find the non-rcs between now and v19.11
+    tags = [ tag.replace('\"','') \
+             for tag in reversed(tags) \
+             if pattern.match(tag) ][:-3]
+
+    return tags
+
+def fix_directory_name(path):
+    '''Prepend librte to the source directory name'''
+    mapfilepath1 = str(path.parent.name)
+    mapfilepath2 = str(path.parents[1])
+    mapfilepath = mapfilepath2 + '/librte_' + mapfilepath1
+
+    return mapfilepath
+
+def directory_renamed(path, rel):
+    '''Fix removal of the librte_ from the directory names'''
+
+    mapfilepath = fix_directory_name(path)
+    tagfile = '{}:{}/{}'.format(rel, mapfilepath,  path.name)
+
+    try:
+        result = subprocess.run(['git', 'show', tagfile], \
+                                stdout=subprocess.PIPE, \
+                                stderr=subprocess.PIPE,
+                                check=True)
+    except subprocess.CalledProcessError:
+        result = None
+
+    return result
+
+def mapfile_renamed(path, rel):
+    '''Fix renaming of the map file'''
+    newfile = None
+
+    result = subprocess.run(['git', 'ls-tree', \
+                             rel, str(path.parent) + '/'], \
+                            stdout=subprocess.PIPE, \
+                            stderr=subprocess.PIPE,
+                            check=True)
+    dentries = result.stdout.decode('utf-8')
+    dentries = dentries.split('\n')
+
+    # filter entries looking for the map file
+    dentries = [dentry for dentry in dentries if dentry.endswith('.map')]
+    if len(dentries) > 1 or len(dentries) == 0:
+        return None
+
+    dparts = dentries[0].split('/')
+    newfile = dparts[len(dparts) - 1]
+
+    if newfile is not None:
+        tagfile = '{}:{}/{}'.format(rel, path.parent, newfile)
+
+        try:
+            result = subprocess.run(['git', 'show', tagfile], \
+                                    stdout=subprocess.PIPE, \
+                                    stderr=subprocess.PIPE,
+                                    check=True)
+        except subprocess.CalledProcessError:
+            result = None
+
+    else:
+        result = None
+
+    return result
+
+def mapfile_and_directory_renamed(path, rel):
+    '''Fix renaming of the map file & the source directory'''
+    mapfilepath = Path("{}/{}".format(fix_directory_name(path),path.name))
+
+    return mapfile_renamed(mapfilepath, rel)
+
+def get_terminal_rows():
+    '''Find the number of rows in the terminal'''
+
+    return os.get_terminal_size().lines
+
+class FormatOutput():
+    '''Format the output to supported formats'''
+    output_fmt = ""
+    column_fmt = ""
+
+    def __init__(self, format_output, dpdk_releases):
+        self.OUTPUT_FORMATS[format_output](self,dpdk_releases)
+        self.column_titles = ['mapfile'] +  dpdk_releases
+
+        self.terminal_rows = get_terminal_rows()
+        self.row = 0
+
+    def set_terminal_output(self,dpdk_rel):
+        '''Set the output format to Tabbed Separated Values'''
+
+        self.output_fmt = '{:<50}' + \
+            ''.join(['{:<6}{:<6}'] * (len(dpdk_rel)))
+        self.column_fmt = '{:50}' + \
+            ''.join(['{:<12}'] * (len(dpdk_rel)))
+
+    def set_csv_output(self,dpdk_rel):
+        '''Set the output format to Comma Separated Values'''
+
+        self.output_fmt = '{},' + \
+            ','.join(['{},{}'] * (len(dpdk_rel)))
+        self.column_fmt = '{},' + \
+            ','.join(['{},'] * (len(dpdk_rel)))
+
+    def print_columns(self):
+        '''Print column rows with release names'''
+        print(self.column_fmt.format(*self.column_titles))
+        self.row += 1
+
+    def print_row(self,symbols):
+        '''Print row of symbol values'''
+        print(self.output_fmt.format(*symbols))
+        self.row += 1
+
+        if((self.terminal_rows>0) and ((self.row % self.terminal_rows) == 0)):
+            self.print_columns()
+
+    OUTPUT_FORMATS = { None: set_terminal_output, \
+                       'terminal': set_terminal_output, \
+                       'csv': set_csv_output }
+
+SRC_DIRECTORIES = 'drivers,lib'
+IGNORE_SECTIONS = ['EXPERIMENTAL','INTERNAL']
+FIX_STRATEGIES = [directory_renamed, \
+                  mapfile_renamed, \
+                  mapfile_and_directory_renamed]
+
+def count_release_symbols(map_parser, release, mapfile_path):
+    '''Count the symbols for a given release and mapfile'''
+    csym = [0] * 2
+    abi_sections = None
+
+    tagfile = '{}:{}'.format(release,mapfile_path)
+    try:
+        result = subprocess.run(['git', 'show', tagfile], \
+                                stdout=subprocess.PIPE, \
+                                stderr=subprocess.PIPE,
+                                check=True)
+    except subprocess.CalledProcessError:
+        result = None
+
+    for fix_strategy in FIX_STRATEGIES:
+        if result is not None:
+            break
+        result = fix_strategy(mapfile_path, release)
+
+    if result is not None:
+        mapfile = result.stdout.decode('utf-8')
+        abi_sections = map_parser(mapfile).abi()
+
+    if abi_sections is not None:
+        # which versions are present, and we care about
+        found_ver = [ver \
+                     for ver in abi_sections \
+                     if ver not in IGNORE_SECTIONS]
+
+        for ver in found_ver:
+            csym[0] += len(abi_sections[ver])
+
+        # count experimental symbols
+        if 'EXPERIMENTAL' in abi_sections:
+            csym[1] = len(abi_sections['EXPERIMENTAL'])
+
+    return csym
+
+def main():
+    '''Main entry point'''
+
+    parser = argparse.ArgumentParser(description='Count symbols in DPDK Libs')
+    parser.add_argument('--format-output', choices=['terminal','csv'], \
+                        default='terminal')
+    parser.add_argument('--directory', choices=SRC_DIRECTORIES.split(','),
+                        default=SRC_DIRECTORIES)
+    args = parser.parse_args()
+
+    dpdk_releases = get_dpdk_releases()
+    format_output = FormatOutput(args.format_output, dpdk_releases)
+
+    map_grammar = MAP_GRAMMAR.format(get_abi_versions())
+    map_parser = makeGrammar(map_grammar, {})
+
+    format_output.print_columns()
+    for src_dir in args.directory.split(','):
+        for path in Path(src_dir).rglob('*.map'):
+            relsym = [str(path)]
+
+            for release in dpdk_releases:
+                csym = count_release_symbols(map_parser, release, path)
+                relsym += csym
+
+            format_output.print_row(relsym)
+
+if __name__ == '__main__':
+    main()
-- 
2.26.2