From: Stefano Brivio <sbrivio@redhat.com>
To: passt-dev@passt.top
Cc: David Gibson <david@gibson.dropbear.id.au>
Subject: [PATCH v6 4/8] Makefile: Disable readability-math-missing-parentheses clang-tidy check
Date: Wed, 30 Oct 2024 09:40:31 +0100 [thread overview]
Message-ID: <20241030084035.3195229-5-sbrivio@redhat.com> (raw)
In-Reply-To: <20241030084035.3195229-1-sbrivio@redhat.com>
With clang-tidy and LLVM 19:
/home/sbrivio/passt/conf.c:1218:29: error: '*' has higher precedence than '+'; add parentheses to explicitly specify the order of operations [readability-math-missing-parentheses,-warnings-as-errors]
1218 | const char *octet = str + 3 * i;
| ^~~~~~
| ( )
/home/sbrivio/passt/ndp.c:285:18: error: '*' has higher precedence than '+'; add parentheses to explicitly specify the order of operations [readability-math-missing-parentheses,-warnings-as-errors]
285 | .len = 1 + 2 * n,
| ^~~~~~
| ( )
/home/sbrivio/passt/ndp.c:329:23: error: '%' has higher precedence than '-'; add parentheses to explicitly specify the order of operations [readability-math-missing-parentheses,-warnings-as-errors]
329 | memset(ptr, 0, 8 - dns_s_len % 8); /* padding */
| ^~~~~~~~~~~~~~
| ( )
/home/sbrivio/passt/pcap.c:131:20: error: '*' has higher precedence than '+'; add parentheses to explicitly specify the order of operations [readability-math-missing-parentheses,-warnings-as-errors]
131 | pcap_frame(iov + i * frame_parts, frame_parts, offset, &now);
| ^~~~~~~~~~~~~~~~
| ( )
/home/sbrivio/passt/util.c:216:10: error: '/' has higher precedence than '+'; add parentheses to explicitly specify the order of operations [readability-math-missing-parentheses,-warnings-as-errors]
216 | return (a->tv_nsec + 1000000000 - b->tv_nsec) / 1000 +
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| ( )
/home/sbrivio/passt/util.c:217:10: error: '*' has higher precedence than '+'; add parentheses to explicitly specify the order of operations [readability-math-missing-parentheses,-warnings-as-errors]
217 | (a->tv_sec - b->tv_sec - 1) * 1000000;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| ( )
/home/sbrivio/passt/util.c:220:9: error: '/' has higher precedence than '+'; add parentheses to explicitly specify the order of operations [readability-math-missing-parentheses,-warnings-as-errors]
220 | return (a->tv_nsec - b->tv_nsec) / 1000 +
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| ( )
/home/sbrivio/passt/util.c:221:9: error: '*' has higher precedence than '+'; add parentheses to explicitly specify the order of operations [readability-math-missing-parentheses,-warnings-as-errors]
221 | (a->tv_sec - b->tv_sec) * 1000000;
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| ( )
/home/sbrivio/passt/util.c:545:32: error: '/' has higher precedence than '+'; add parentheses to explicitly specify the order of operations [readability-math-missing-parentheses,-warnings-as-errors]
545 | return clone(fn, stack_area + stack_size / 2, flags, arg);
| ^~~~~~~~~~~~~~~
| ( )
Just... no.
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
---
Makefile | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/Makefile b/Makefile
index 01f0cc1..c1c6e30 100644
--- a/Makefile
+++ b/Makefile
@@ -255,6 +255,12 @@ docs: README.md
# makes sense when those defines form an enum-like set, but
# weird for cases like standalone constants, and causes other
# awkwardness for a bunch of cases we use
+#
+# - readability-math-missing-parentheses
+# It's been a couple of centuries since multiplication has been granted
+# precedence over addition in modern mathematical notation. Adding
+# parentheses to reinforce that certainly won't improve readability.
+
clang-tidy: $(filter-out qrap.c,$(SRCS)) $(HEADERS)
clang-tidy -checks=*,-modernize-*,\
@@ -281,7 +287,8 @@ clang-tidy: $(filter-out qrap.c,$(SRCS)) $(HEADERS)
-concurrency-mt-unsafe,\
-readability-identifier-length,\
-misc-include-cleaner,\
- -cppcoreguidelines-macro-to-enum \
+ -cppcoreguidelines-macro-to-enum,\
+ -readability-math-missing-parentheses \
-config='{CheckOptions: [{key: bugprone-suspicious-string-compare.WarnOnImplicitComparison, value: "false"}]}' \
--warnings-as-errors=* $(filter-out qrap.c,$(SRCS)) -- $(filter-out -pie,$(FLAGS) $(CFLAGS) $(CPPFLAGS)) -DCLANG_TIDY_58992
--
@@ -255,6 +255,12 @@ docs: README.md
# makes sense when those defines form an enum-like set, but
# weird for cases like standalone constants, and causes other
# awkwardness for a bunch of cases we use
+#
+# - readability-math-missing-parentheses
+# It's been a couple of centuries since multiplication has been granted
+# precedence over addition in modern mathematical notation. Adding
+# parentheses to reinforce that certainly won't improve readability.
+
clang-tidy: $(filter-out qrap.c,$(SRCS)) $(HEADERS)
clang-tidy -checks=*,-modernize-*,\
@@ -281,7 +287,8 @@ clang-tidy: $(filter-out qrap.c,$(SRCS)) $(HEADERS)
-concurrency-mt-unsafe,\
-readability-identifier-length,\
-misc-include-cleaner,\
- -cppcoreguidelines-macro-to-enum \
+ -cppcoreguidelines-macro-to-enum,\
+ -readability-math-missing-parentheses \
-config='{CheckOptions: [{key: bugprone-suspicious-string-compare.WarnOnImplicitComparison, value: "false"}]}' \
--warnings-as-errors=* $(filter-out qrap.c,$(SRCS)) -- $(filter-out -pie,$(FLAGS) $(CFLAGS) $(CPPFLAGS)) -DCLANG_TIDY_58992
--
2.43.0
next prev parent reply other threads:[~2024-10-30 8:40 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-30 8:40 [PATCH v6 0/8] Take care of clang-tidy warnings with LLVM >= 16 Stefano Brivio
2024-10-30 8:40 ` [PATCH v6 1/8] Makefile: Exclude qrap.c from clang-tidy checks Stefano Brivio
2024-10-30 8:40 ` [PATCH v6 2/8] treewide: Comply with CERT C rule ERR33-C for snprintf() Stefano Brivio
2024-10-30 8:40 ` [PATCH v6 3/8] treewide: Silence cert-err33-c clang-tidy warnings for fprintf() Stefano Brivio
2024-10-30 8:40 ` Stefano Brivio [this message]
2024-10-30 8:40 ` [PATCH v6 5/8] treewide: Suppress clang-tidy warning if we already use O_CLOEXEC Stefano Brivio
2024-10-30 8:40 ` [PATCH v6 6/8] treewide: Address cert-err33-c clang-tidy warnings for clock and timer functions Stefano Brivio
2024-10-30 8:40 ` [PATCH v6 7/8] udp: Take care of cert-int09-c clang-tidy warning for enum udp_iov_idx Stefano Brivio
2024-10-30 8:40 ` [PATCH v6 8/8] util: Don't use errno after a successful call in __daemon() Stefano Brivio
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