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AJvYcCWlwbUrLoSnrIBsOCk55qzpekD38jM9CRr9l9TTvNF9dcbRrqI9vOu3SEGAM2OkO2DtmSp/@lists.linux.dev X-Gm-Message-State: AOJu0Yx78w2PRO80HqJ/BqAGkDKD5aLRjLC4kIdFCNXgT1vBJHkZ+AdA nepZh6/KLfarCvsYcz/G3E5xuBuqbw1BWpH/Jr74SK8Bn/Wzo3+rYnkUBacLU1QbtbAF43FvwmZ vSEiBGg== X-Google-Smtp-Source: AGHT+IHkONYHJZfK+RtGOYuqOR3Tmv1Fc5hyNA9X/JV4Uor3w7tc3iAjbnOBIe0SDP0OTR36qQM2EwN7Mdm0 X-Received: from pjbpt8.prod.google.com ([2002:a17:90b:3d08:b0:308:670e:aa2c]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:1804:b0:301:1d03:93cf with SMTP id 98e67ed59e1d1-30a3447ef20mr4890430a91.30.1746035505522; Wed, 30 Apr 2025 10:51:45 -0700 (PDT) Date: Wed, 30 Apr 2025 10:50:12 -0700 In-Reply-To: <20250430175036.184610-1-irogers@google.com> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250430175036.184610-1-irogers@google.com> X-Mailer: git-send-email 2.49.0.906.g1f30a19c02-goog Message-ID: <20250430175036.184610-25-irogers@google.com> Subject: [PATCH v2 24/47] perf help: Silence -Wshorten-64-to-32 warnings From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Adrian Hunter , Kan Liang , Yury Norov , Rasmus Villemoes , Thomas Gleixner , Darren Hart , Davidlohr Bueso , "=?UTF-8?q?Andr=C3=A9=20Almeida?=" , John Garry , Will Deacon , James Clark , Mike Leach , Leo Yan , Yicong Yang , Jonathan Cameron , Nathan Chancellor , Bill Wendling , Justin Stitt , Josh Poimboeuf , Al Viro , Kyle Meyer , Ben Gainey , Athira Rajeev , Kajol Jain , Aditya Gupta , Eder Zulian , Dapeng Mi , Kuan-Wei Chiu , He Zhe , Dirk Gouders , Brian Geffon , Ravi Bangoria , Howard Chu , Charlie Jenkins , Colin Ian King , Dominique Martinet , Jann Horn , Masahiro Yamada , Arnd Bergmann , Yang Jihong , Dmitry Vyukov , Andi Kleen , Graham Woodward , Ilkka Koskinen , Anshuman Khandual , Zhongqiu Han , Hao Ge , Tengda Wu , Gabriele Monaco , Chun-Tse Shao , Casey Chen , "Dr. David Alan Gilbert" , Li Huafei , "Steinar H. Gunderson" , Levi Yun , Weilin Wang , Thomas Falcon , Thomas Richter , Andrew Kreimer , "=?UTF-8?q?Krzysztof=20=C5=81opatowski?=" , Christophe Leroy , Jean-Philippe Romain , Junhao He , "Masami Hiramatsu (Google)" , Xu Yang , Steve Clevenger , Zixian Cai , Stephen Brennan , Yujie Liu , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev Cc: Ian Rogers Content-Type: text/plain; charset="UTF-8" The clang warning -Wshorten-64-to-32 can be useful to catch inadvertent truncation. In some instances this truncation can lead to changing the sign of a result, for example, truncation to return an int to fit a sort routine. Silence the warning by making the implicit truncation explicit. Signed-off-by: Ian Rogers --- tools/perf/builtin-help.c | 4 ++-- tools/perf/util/help-unknown-cmd.c | 14 ++++++++------ tools/perf/util/levenshtein.c | 18 +++++++++--------- 3 files changed, 19 insertions(+), 17 deletions(-) diff --git a/tools/perf/builtin-help.c b/tools/perf/builtin-help.c index 7be6fb6df595..05151c68191f 100644 --- a/tools/perf/builtin-help.c +++ b/tools/perf/builtin-help.c @@ -301,7 +301,7 @@ static struct cmdnames main_cmds, other_cmds; void list_common_cmds_help(void) { - unsigned int i, longest = 0; + size_t i, longest = 0; for (i = 0; i < ARRAY_SIZE(common_cmds); i++) { if (longest < strlen(common_cmds[i].name)) @@ -310,7 +310,7 @@ void list_common_cmds_help(void) puts(" The most commonly used perf commands are:"); for (i = 0; i < ARRAY_SIZE(common_cmds); i++) { - printf(" %-*s ", longest, common_cmds[i].name); + printf(" %-*s ", (int)longest, common_cmds[i].name); puts(common_cmds[i].help); } } diff --git a/tools/perf/util/help-unknown-cmd.c b/tools/perf/util/help-unknown-cmd.c index a0a46e34f8d1..f0a0b8c13a92 100644 --- a/tools/perf/util/help-unknown-cmd.c +++ b/tools/perf/util/help-unknown-cmd.c @@ -24,14 +24,15 @@ static int levenshtein_compare(const void *p1, const void *p2) { const struct cmdname *const *c1 = p1, *const *c2 = p2; const char *s1 = (*c1)->name, *s2 = (*c2)->name; - int l1 = (*c1)->len; - int l2 = (*c2)->len; - return l1 != l2 ? l1 - l2 : strcmp(s1, s2); + ssize_t l1 = (*c1)->len; + ssize_t l2 = (*c2)->len; + + return l1 != l2 ? (int)(l1 - l2) : (int)strcmp(s1, s2); } static int add_cmd_list(struct cmdnames *cmds, struct cmdnames *old) { - unsigned int i, nr = cmds->cnt + old->cnt; + size_t nr = cmds->cnt + old->cnt; void *tmp; if (nr > cmds->alloc) { @@ -45,7 +46,7 @@ static int add_cmd_list(struct cmdnames *cmds, struct cmdnames *old) return -1; cmds->names = tmp; } - for (i = 0; i < old->cnt; i++) + for (size_t i = 0; i < old->cnt; i++) cmds->names[cmds->cnt++] = old->names[i]; zfree(&old->names); old->cnt = 0; @@ -54,7 +55,8 @@ static int add_cmd_list(struct cmdnames *cmds, struct cmdnames *old) const char *help_unknown_cmd(const char *cmd, struct cmdnames *main_cmds) { - unsigned int i, n = 0, best_similarity = 0; + unsigned int i, n = 0; + size_t best_similarity = 0; struct cmdnames other_cmds; memset(&other_cmds, 0, sizeof(other_cmds)); diff --git a/tools/perf/util/levenshtein.c b/tools/perf/util/levenshtein.c index 6a6712635aa4..f6912b848c4a 100644 --- a/tools/perf/util/levenshtein.c +++ b/tools/perf/util/levenshtein.c @@ -44,19 +44,19 @@ int levenshtein(const char *string1, const char *string2, int w, int s, int a, int d) { - int len1 = strlen(string1), len2 = strlen(string2); + size_t len1 = strlen(string1), len2 = strlen(string2); int *row0 = malloc(sizeof(int) * (len2 + 1)); int *row1 = malloc(sizeof(int) * (len2 + 1)); int *row2 = malloc(sizeof(int) * (len2 + 1)); - int i, j; + int ret; - for (j = 0; j <= len2; j++) - row1[j] = j * a; - for (i = 0; i < len1; i++) { + for (size_t j = 0; j <= len2; j++) + row1[j] = (int)j * a; + for (size_t i = 0; i < len1; i++) { int *dummy; - row2[0] = (i + 1) * d; - for (j = 0; j < len2; j++) { + row2[0] = ((int)i + 1) * d; + for (size_t j = 0; j < len2; j++) { /* substitution */ row2[j + 1] = row1[j] + s * (string1[i] != string2[j]); /* swap */ @@ -78,10 +78,10 @@ int levenshtein(const char *string1, const char *string2, row2 = dummy; } - i = row1[len2]; + ret = row1[len2]; free(row0); free(row1); free(row2); - return i; + return ret; } -- 2.49.0.906.g1f30a19c02-goog