From patchwork Thu Apr 23 15:44:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Giuliano Procida X-Patchwork-Id: 39146 From: gprocida@google.com (Giuliano Procida) Date: Thu, 23 Apr 2020 16:44:39 +0100 Subject: [PATCH 19/21] Warn if user-supplied regexes fail to compile. In-Reply-To: <20200423154441.170531-1-gprocida@google.com> References: <20200423154441.170531-1-gprocida@google.com> Message-ID: <20200423154441.170531-20-gprocida@google.com> There are not many calls to regex::compile in the code base. Two of these pass internally-generated regexes and are followed by assertions that the regexes compile. The remaining cases deal with user-supplied regexes. If these fail to compile they are currently silently ignored. This patch makes sure failures now result in warning messages on stderr, but otherwise does not change program behaviour. * src/abg-corpus-priv.h (corpus::exported_decls_builder::priv::compiled_regex_fns_suppress): Emit a warning message if regex::compile fails. (corpus::exported_decls_builder::priv::compiled_regex_fns_keep): Ditto. (corpus::exported_decls_builder::priv::compiled_regex_vars_suppress): Ditto. (corpus::exported_decls_builder::priv::compiled_regex_vars_keep): Ditto. * src/abg-suppression.cc (maybe_get_string_prop): Ditto. (read_parameter_spec_from_string): Ditto. Signed-off-by: Giuliano Procida --- src/abg-corpus-priv.h | 8 ++++++++ src/abg-suppression.cc | 4 ++++ 2 files changed, 12 insertions(+) diff --git a/src/abg-corpus-priv.h b/src/abg-corpus-priv.h index 2618e2d0..cae2dfb0 100644 --- a/src/abg-corpus-priv.h +++ b/src/abg-corpus-priv.h @@ -126,6 +126,8 @@ public: regex_t_sptr r = regex::compile(*i); if (r) compiled_fns_suppress_regexp_.push_back(r); + else + std::cerr << "warning: bad regex '" << *i << "'\n"; } } return compiled_fns_suppress_regexp_; @@ -148,6 +150,8 @@ public: regex_t_sptr r = regex::compile(*i); if (r) compiled_fns_keep_regexps_.push_back(r); + else + std::cerr << "warning: bad regex '" << *i << "'\n"; } } return compiled_fns_keep_regexps_; @@ -170,6 +174,8 @@ public: regex_t_sptr r = regex::compile(*i); if (r) compiled_vars_suppress_regexp_.push_back(r); + else + std::cerr << "warning: bad regex '" << *i << "'\n"; } } return compiled_vars_suppress_regexp_; @@ -192,6 +198,8 @@ public: regex_t_sptr r = regex::compile(*i); if (r) compiled_vars_keep_regexps_.push_back(r); + else + std::cerr << "warning: bad regex '" << *i << "'\n"; } } return compiled_vars_keep_regexps_; diff --git a/src/abg-suppression.cc b/src/abg-suppression.cc index 3db2b7b1..8632d028 100644 --- a/src/abg-suppression.cc +++ b/src/abg-suppression.cc @@ -1644,6 +1644,8 @@ maybe_get_regex_prop(const ini::config::section& section, if (!maybe_get_string_prop(section, name, str)) return false; regex = regex::compile(str); + if (!regex) + std::cerr << "warning: bad regex '" << str << "'\n"; return true; } @@ -3161,6 +3163,8 @@ read_parameter_spec_from_string(const string& str) if (is_regex) { type_name_regex = regex::compile(type_name); + if (!type_name_regex) + std::cerr << "warning: bad regex '" << type_name << "'\n"; type_name.clear(); } function_suppression::parameter_spec* p =