8000 Fix build warning by vvb2060 · Pull Request #11874 · curl/curl · GitHub
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Fix build warning #11874

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Fix build warning #11874

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vvb2060
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@vvb2060 vvb2060 commented Sep 17, 2023 
C/C++: [armeabi-v7a] Compile thumb  : curl_static <= connect.c
C/C++: curl-android/curl/src/main/native/curl/lib/connect.c:650:11: error: format specifies type 'long' but the argument has type 'timediff_t' (aka 'long long') [-Werror,-Wformat]
C/C++:           Curl_timediff(now, data->progress.t_startsingle));
C/C++:           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C/C++: 1 error generated.

C/C++: [armeabi-v7a] Compile thumb  : curl_static <= http2.c
C/C++: curl-android/curl/src/main/native/curl/lib/http2.c:2316:17: error: format specifies type 'long long' but the argument has type 'ssize_t' (aka 'int') [-Werror,-Wformat]
C/C++:                 (ssize_t)stream->upload_left,
C/C++:                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C/C++: curl-android/curl/src/main/native/curl/lib/curl_trc.h:123:38: note: expanded from macro 'CURL_TRC_CF'
C/C++:          Curl_trc_cf_infof(data, cf, __VA_ARGS__); } while(0)
C/C++:                                      ^~~~~~~~~~~
C/C++: 1 error generated.

C/C++: [armeabi-v7a] Compile thumb  : curl_static <= mqtt.c
C/C++: curl-android/curl/src/main/native/curl/lib/mqtt.c:303:55: error: format specifies type 'unsigned long' but the argument has type 'size_t' (aka 'unsigned int') [-Werror,-Wformat]
C/C++:     failf(data, "Client ID length mismatched: [%lu]", strlen(client_id));
C/C++:                                                ~~~    ^~~~~~~~~~~~~~~~~
C/C++:                                                %zu
C/C++: curl-android/curl/src/main/native/curl/lib/mqtt.c:320:51: error: format specifies type 'unsigned long' but the argument has type 'size_t' (aka 'unsigned int') [-Werror,-Wformat]
C/C++:       failf(data, "Username is too large: [%lu]", ulen);
C/C++:                                            ~~~    ^~~~
C/C++:                                            %zu
C/C++: curl-android/curl/src/main/native/curl/lib/mqtt.c:330:51: error: format specifies type 'unsigned long' but the argument has type 'size_t' (aka 'unsigned int') [-Werror,-Wformat]
C/C++:       failf(data, "Password is too large: [%lu]", plen);
C/C++:                                            ~~~    ^~~~
C/C++:                                            %zu
C/C++: 3 errors generated.

C/C++: [armeabi-v7a] Compile thumb  : curl_static <= url.c
C/C++: curl-android/curl/src/main/native/curl/lib/url.c:892:11: error: format specifies type 'long' but the argument has type 'timediff_t' (aka 'long long') [-Werror,-Wformat]
C/C++:           idletime);
C/C++:           ^~~~~~~~
C/C++: curl-android/curl/src/main/native/curl/lib/curl_trc.h:120:27: note: expanded from macro 'infof'
C/C++:          Curl_infof(data, __VA_ARGS__); } while(0)
C/C++:                           ^~~~~~~~~~~
C/C++: curl-android/curl/src/main/native/curl/lib/url.c:902:11: error: format specifies type 'long' but the argument has type 'timediff_t' (aka 'long long') [-Werror,-Wformat]
C/C++:           lifetime);
C/C++:           ^~~~~~~~
C/C++: curl-android/curl/src/main/native/curl/lib/curl_trc.h:120:27: note: expanded from macro 'infof'
C/C++:          Curl_infof(data, __VA_ARGS__); } while(0)
C/C++:                           ^~~~~~~~~~~
C/C++: curl-android/curl/src/main/native/curl/lib/url.c:3044:52: warning: use of logical '||' with constant operand [-Wconstant-logical-operand]
C/C++:      ((conn->handler->protocol == CURLPROTO_HTTPS) ||
C/C++:                                                    ^
C/C++: curl-android/curl/src/main/native/curl/lib/url.c:3044:52: note: use '|' for a bitwise operation
C/C++:      ((conn->handler->protocol == CURLPROTO_HTTPS) ||
C/C++:                                                    ^~
C/C++:                                                    |
C/C++: curl-android/curl/src/main/native/curl/lib/url.c:3219:11: error: format specifies type 'long' but the argument has type 'timediff_t' (aka 'long long') [-Werror,-Wformat]
C/C++:           Curl_timediff(Curl_now(), data->progress.t_startsingle));
C/C++:           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
C/C++: 1 warning and 3 errors generated.

@vvb2060
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vvb2060 commented Sep 17, 2023

I ignored constant-logical-operand check because it had false positives(https://reviews.llvm.org/D142609), but I believe it did find some suspicious code.

C/C++: [arm64-v8a] Compile        : curl_static <= cf-h2-proxy.c
C/C++: curl-android/curl/src/main/native/curl/lib/cf-h2-proxy.c:236:39: warning: use of logical '||' with constant operand [-Wconstant-logical-operand]
C/C++:   if(data->state.dselect_bits != bits || 1) {
C/C++:                                       ^  ~
C/C++: curl-android/curl/src/main/native/curl/lib/cf-h2-proxy.c:236:39: note: use '|' for a bitwise operation
C/C++:   if(data->state.dselect_bits != bits || 1) {
C/C++:                                       ^~
C/C++:                                       |
C/C++: 1 warning generated.

Forgot to delete?

C/C++: curl-android/curl/src/main/native/curl/lib/hostip.c:789:41: warning: use of logical '&&' with constant operand [-Wconstant-logical-operand]
C/C++:       else if(allowDOH && data->set.doh && !ipnum)
C/C++:                                         ^  ~~~~~~
C/C++: curl-android/curl/src/main/native/curl/lib/hostip.c:789:41: note: use '&' for a bitwise operation
C/C++:       else if(allowDOH && data->set.doh && !ipnum)
C/C++:                                         ^~
C/C++:                                         &
C/C++: curl-android/curl/src/main/native/curl/lib/hostip.c:789:41: note: remove constant to silence this warning
C/C++:       else if(allowDOH && data->set.doh && !ipnum)
C/C++:                                        ~^~~~~~~~~
C/C++: 1 warning generated.

llvm/llvm-project#63963

C/C++: [arm64-v8a] Compile        : curl_static <= http.c
C/C++: curl-android/curl/src/main/native/curl/lib/http.c:3788:49: warning: use of logical '||' with constant operand [-Wconstant-logical-operand]
C/C++:           ((conn->handler->flags & PROTOPT_SSL) ||
C/C++:                                                 ^
C/C++: curl-android/curl/src/main/native/curl/lib/http.c:3788:49: note: use '|' for a bitwise operation
C/C++:           ((conn->handler->flags & PROTOPT_SSL) ||
C/C++:                                                 ^~
C/C++:                                                 |
C/C++: curl-android/curl/src/main/native/curl/lib/http.c:3811:49: warning: use of logical '||' with constant operand [-Wconstant-logical-operand]
C/C++:           ((conn->handler->flags & PROTOPT_SSL) ||
C/C++:                                                 ^
C/C++: curl-android/curl/src/main/native/curl/lib/http.c:3811:49: note: use '|' for a bitwise operation
C/C++:           ((conn->handler->flags & PROTOPT_SSL) ||
C/C++:                                                 ^~
C/C++:                                                 |
C/C++: 2 warnings generated.

llvm/llvm-project#63963 It can be fixed by moving || into macro. Should this be fixed by curl, or is this a normal use case?

C/C++: [arm64-v8a] Compile        : curl_static <= url.c
C/C++: curl-android/curl/src/main/native/curl/lib/url.c:3044:52: warning: use of logical '||' with constant operand [-Wconstant-logical-operand]
C/C++:      ((conn->handler->protocol == CURLPROTO_HTTPS) ||
C/C++:                                                    ^
C/C++: curl-android/curl/src/main/native/curl/lib/url.c:3044:52: note: use '|' for a bitwise operation
C/C++:      ((conn->handler->protocol == CURLPROTO_HTTPS) ||
C/C++:                                                    ^~
C/C++:                                                    |
C/C++: 1 warning generated.

Same as the previous one.

C/C++: curl-android/curl/src/main/native/curl/lib/setopt.c:495:40: warning: use of logical '||' with constant operand [-Wconstant-logical-operand]
C/C++:       if((data->set.postfieldsize < 0) ||
C/C++:                                        ^
C/C++: curl-android/curl/src/main/native/curl/lib/setopt.c:495:40: note: use '|' for a bitwise operation
C/C++:       if((data->set.postfieldsize < 0) ||
C/C++:                                        ^~
C/C++:                                        |
C/C++: 1 warning generated.

llvm/llvm-project#64356

@bagder
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bagder commented Sep 17, 2023

@icing, the cf-h2-proxy.c:236:39 || 1 thing looks like a mistake we should fix, right?

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bagder commented Sep 17, 2023

The hostip.c:789:41 warning looks wrong. They are not constant values in the expression.

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bagder commented Sep 17, 2023

The http.c:3788:49 warning is wrong too.

@vvb2060
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vvb2060 commented Sep 17, 2023

Yes, I think all but the first one are false positives. I show them all here to provide some practical use cases for llvm.

@bagder bagder closed this in 746dbc1 Sep 18, 2023
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bagder commented Sep 18, 2023

Thanks!

ptitSeb pushed a commit to wasix-org/curl that referenced this pull request Sep 25, 2023
@vvb2060 @ptitSeb
lib: failf/infof compiler warnings
d0e51c6 
Closes curl#11874
@vvb2060 vvb2060 deleted the build branch February 7, 2024 05:42
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