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Tsirkin" , Mahmoud Mandour , Pierrick Bouvier Subject: [PATCH 10/12] plugins: detect qemu plugin API symbols from header Date: Wed, 30 Oct 2024 21:04:24 -0700 Message-Id: <20241031040426.772604-11-pierrick.bouvier@linaro.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241031040426.772604-1-pierrick.bouvier@linaro.org> References: <20241031040426.772604-1-pierrick.bouvier@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1029; envelope-from=pierrick.bouvier@linaro.org; helo=mail-pj1-x1029.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1730347645379116600 Content-Type: text/plain; charset="utf-8" Instead of using a static file (error prone and hard to keep in sync), we generate it using a script. Note: if a symbol is not exported, we'll now notice it when linking for Windows/MacOS platforms. Signed-off-by: Pierrick Bouvier --- MAINTAINERS | 1 + plugins/meson.build | 12 ++++++--- scripts/qemu-plugin-symbols.py | 45 ++++++++++++++++++++++++++++++++++ 3 files changed, 55 insertions(+), 3 deletions(-) create mode 100755 scripts/qemu-plugin-symbols.py diff --git a/MAINTAINERS b/MAINTAINERS index f48d9142b8a..d34b6606e95 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3719,6 +3719,7 @@ F: plugins/ F: tests/tcg/plugins/ F: tests/avocado/tcg_plugins.py F: contrib/plugins/ +F: scripts/qemu-plugin-symbols.py =20 AArch64 TCG target M: Richard Henderson diff --git a/plugins/meson.build b/plugins/meson.build index 51297582f93..d60be2a4d6d 100644 --- a/plugins/meson.build +++ b/plugins/meson.build @@ -2,11 +2,17 @@ if not get_option('plugins') subdir_done() endif =20 +qemu_plugin_symbols =3D configure_file( + input: files('../include/qemu/qemu-plugin.h'), + output: 'qemu-plugin.symbols', + capture: true, + command: [files('../scripts/qemu-plugin-symbols.py'), '@INPUT@']) + # Modules need more symbols than just those in plugins/qemu-plugins.symbols if not enable_modules if host_os =3D=3D 'darwin' configure_file( - input: files('qemu-plugins.symbols'), + input: qemu_plugin_symbols, output: 'qemu-plugins-ld64.symbols', capture: true, command: ['sed', '-ne', 's/^[[:space:]]*\\(qemu_.*\\);/_\\1/p', '@IN= PUT@']) @@ -15,7 +21,7 @@ if not enable_modules # LLVM/lld does not support exporting specific symbols. However, it wo= rks # out of the box with dllexport/dllimport attribute we set in the code. else - emulator_link_args +=3D ['-Xlinker', '--dynamic-list=3D' + (meson.proj= ect_source_root() / 'plugins/qemu-plugins.symbols')] + emulator_link_args +=3D ['-Xlinker', '--dynamic-list=3D' + qemu_plugin= _symbols.full_path()] endif endif =20 @@ -24,7 +30,7 @@ if host_os =3D=3D 'windows' # First, create a .def file listing all the symbols a plugin should expe= ct to have # available in qemu win32_plugin_def =3D configure_file( - input: files('qemu-plugins.symbols'), + input: qemu_plugin_symbols, output: 'qemu_plugin_api.def', capture: true, command: ['sed', '-e', '0,/^/s//EXPORTS/; s/[{};]//g', '@INPUT@']) diff --git a/scripts/qemu-plugin-symbols.py b/scripts/qemu-plugin-symbols.py new file mode 100755 index 00000000000..e285ebb8f9e --- /dev/null +++ b/scripts/qemu-plugin-symbols.py @@ -0,0 +1,45 @@ +#!/usr/bin/env python3 +# -*- coding: utf-8 -*- +# +# Extract QEMU Plugin API symbols from a header file +# +# Copyright 2024 Linaro Ltd +# +# Author: Pierrick Bouvier +# +# This work is licensed under the terms of the GNU GPL, version 2 or later. +# See the COPYING file in the top-level directory. +# +# SPDX-License-Identifier: GPL-2.0-or-later + +import argparse +import re + +def extract_symbols(plugin_header): + with open(plugin_header) as file: + content =3D file.read() + # Remove QEMU_PLUGIN_API macro definition. + content =3D content.replace('#define QEMU_PLUGIN_API', '') + expected =3D content.count('QEMU_PLUGIN_API') + # Find last word between QEMU_PLUGIN_API and (, matching on several li= nes. + # We use *? non-greedy quantifier. + syms =3D re.findall(r'QEMU_PLUGIN_API.*?(\w+)\s*\(', content, re.DOTAL= L) + syms.sort() + # Ensure we found as many symbols as API markers. + assert len(syms) =3D=3D expected + return syms + +def main() -> None: + parser =3D argparse.ArgumentParser(description=3D'Extract QEMU plugin = symbols') + parser.add_argument('plugin_header', help=3D'Path to QEMU plugin heade= r.') + args =3D parser.parse_args() + + syms =3D extract_symbols(args.plugin_header) + + print('{') + for s in syms: + print(" {};".format(s)) + print('};') + +if __name__ =3D=3D '__main__': + main() --=20 2.39.5